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+To: vim_dev@googlegroups.com
+Subject: Patch 8.1.0360
+Fcc: outbox
+From: Bram Moolenaar <Bram@moolenaar.net>
+Mime-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+------------
+
+Patch 8.1.0360
+Problem: Using an external diff program is slow and inflexible.
+Solution: Include the xdiff library. (Christian Brabandt, closes #2732)
+ Use it by default.
+Files: Filelist, runtime/doc/diff.txt, runtime/doc/options.txt,
+ src/Make_cyg_ming.mak, src/Make_mvc.mak, src/Makefile, src/diff.c,
+ src/structs.h, src/testdir/dumps/Test_diff_01.dump,
+ src/testdir/dumps/Test_diff_02.dump,
+ src/testdir/dumps/Test_diff_03.dump,
+ src/testdir/dumps/Test_diff_04.dump,
+ src/testdir/dumps/Test_diff_05.dump,
+ src/testdir/dumps/Test_diff_06.dump,
+ src/testdir/dumps/Test_diff_07.dump,
+ src/testdir/dumps/Test_diff_08.dump,
+ src/testdir/dumps/Test_diff_09.dump,
+ src/testdir/dumps/Test_diff_10.dump,
+ src/testdir/dumps/Test_diff_11.dump,
+ src/testdir/dumps/Test_diff_12.dump,
+ src/testdir/dumps/Test_diff_13.dump,
+ src/testdir/dumps/Test_diff_14.dump,
+ src/testdir/dumps/Test_diff_15.dump,
+ src/testdir/dumps/Test_diff_16.dump,
+ src/testdir/test_diffmode.vim, src/xdiff/COPYING,
+ src/xdiff/xdiff.h, src/xdiff/xdiffi.c, src/xdiff/xdiffi.h,
+ src/xdiff/xemit.c, src/xdiff/xemit.h, src/xdiff/xhistogram.c,
+ src/xdiff/xinclude.h, src/xdiff/xmacros.h, src/xdiff/xpatience.c,
+ src/xdiff/xprepare.c, src/xdiff/xprepare.h, src/xdiff/xtypes.h,
+ src/xdiff/xutils.c, src/xdiff/xutils.h, src/xdiff/README.txt
+
+
+*** ../vim-8.1.0359/Filelist 2018-09-02 15:26:53.829022193 +0200
+--- Filelist 2018-09-10 17:23:29.323602967 +0200
+***************
+*** 273,278 ****
+--- 273,292 ----
+ src/libvterm/t/92lp1640917.test \
+ src/libvterm/t/harness.c \
+ src/libvterm/t/run-test.pl \
++ src/xdiff/xdiff.h \
++ src/xdiff/xdiffi.c \
++ src/xdiff/xdiffi.h \
++ src/xdiff/xemit.c \
++ src/xdiff/xemit.h \
++ src/xdiff/xhistogram.c \
++ src/xdiff/xinclude.h \
++ src/xdiff/xmacros.h \
++ src/xdiff/xpatience.c \
++ src/xdiff/xprepare.c \
++ src/xdiff/xprepare.h \
++ src/xdiff/xtypes.h \
++ src/xdiff/xutils.c \
++ src/xdiff/xutils.h \
+
+
+ # source files for Unix only
+*** ../vim-8.1.0359/runtime/doc/diff.txt 2018-05-17 13:40:51.000000000 +0200
+--- runtime/doc/diff.txt 2018-09-10 17:24:29.783082384 +0200
+***************
+*** 39,45 ****
+ then append the file name of the first argument to the directory name to find
+ the file.
+
+! This only works when a standard "diff" command is available. See 'diffexpr'.
+
+ Diffs are local to the current tab page |tab-page|. You can't see diffs with
+ a window in another tab page. This does make it possible to have several
+--- 39,47 ----
+ then append the file name of the first argument to the directory name to find
+ the file.
+
+! By default an internal diff library will be used. When 'diffopt' or
+! 'diffexpr' has been set an external "diff" command will be used. This only
+! works when such a diff program is available.
+
+ Diffs are local to the current tab page |tab-page|. You can't see diffs with
+ a window in another tab page. This does make it possible to have several
+***************
+*** 344,351 ****
+
+ The ">" is replaced with the value of 'shellredir'.
+
+! The output of "diff" must be a normal "ed" style diff. Do NOT use a context
+! diff. This example explains the format that Vim expects: >
+
+ 1a2
+ > bbb
+--- 346,354 ----
+
+ The ">" is replaced with the value of 'shellredir'.
+
+! The output of "diff" must be a normal "ed" style diff or a unified diff. Do
+! NOT use a context diff. This example explains the format that Vim expects for
+! the "ed" style diff: >
+
+ 1a2
+ > bbb
+***************
+*** 384,395 ****
+--- 387,402 ----
+ endif
+ silent execute "!diff -a --binary " . opt . v:fname_in . " " . v:fname_new .
+ \ " > " . v:fname_out
++ redraw!
+ endfunction
+
+ The "-a" argument is used to force comparing the files as text, comparing as
+ binaries isn't useful. The "--binary" argument makes the files read in binary
+ mode, so that a CTRL-Z doesn't end the text on DOS.
+
++ The `redraw!` command may not be needed, depending on whether executing a
++ shell command shows something on the display or not.
++
+ *E810* *E97*
+ Vim will do a test if the diff output looks alright. If it doesn't, you will
+ get an error message. Possible causes:
+***************
+*** 441,444 ****
+ directory are accidentally patched. Vim will also delete files starting with
+ v:fname_in and ending in ".rej" and ".orig".
+
+! vim:tw=78:ts=8:ft=help:norl:
+--- 448,451 ----
+ directory are accidentally patched. Vim will also delete files starting with
+ v:fname_in and ending in ".rej" and ".orig".
+
+! vim:tw=78:ts=8:noet:ft=help:norl:
+*** ../vim-8.1.0359/runtime/doc/options.txt 2018-08-07 21:39:09.243060141 +0200
+--- runtime/doc/options.txt 2018-09-10 17:25:45.414250299 +0200
+***************
+*** 2605,2612 ****
+ {not in Vi}
+ {not available when compiled without the |+diff|
+ feature}
+! Expression which is evaluated to obtain an ed-style diff file from two
+! versions of a file. See |diff-diffexpr|.
+ This option cannot be set from a |modeline| or in the |sandbox|, for
+ security reasons.
+
+--- 2609,2616 ----
+ {not in Vi}
+ {not available when compiled without the |+diff|
+ feature}
+! Expression which is evaluated to obtain a diff file (either ed-style
+! or unified-style) from two versions of a file. See |diff-diffexpr|.
+ This option cannot be set from a |modeline| or in the |sandbox|, for
+ security reasons.
+
+***************
+*** 2653,2663 ****
+ foldcolumn:{n} Set the 'foldcolumn' option to {n} when
+ starting diff mode. Without this 2 is used.
+
+! Examples: >
+
+! :set diffopt=filler,context:4
+ :set diffopt=
+! :set diffopt=filler,foldcolumn:3
+ <
+ *'digraph'* *'dg'* *'nodigraph'* *'nodg'*
+ 'digraph' 'dg' boolean (default off)
+--- 2657,2687 ----
+ foldcolumn:{n} Set the 'foldcolumn' option to {n} when
+ starting diff mode. Without this 2 is used.
+
+! internal Use the internal diff library. This is
+! ignored when 'diffexpr' is set. *E960*
+! When running out of memory when writing a
+! buffer this item will be ignored for diffs
+! involving that buffer. Set the 'verbose'
+! option to see when this happens.
+!
+! indent-heuristic
+! Use the indent heuristic for the internal
+! diff library.
+!
+! algorithm:{text} Use the specified diff algorithm with the
+! internal diff engine. Currently supported
+! algorithms are:
+! myers the default algorithm
+! minimal spend extra time to generate the
+! smallest possible diff
+! patience patience diff algorithm
+! histogram histogram diff algorithm
+
+! Examples: >
+! :set diffopt=internal,filler,context:4
+ :set diffopt=
+! :set diffopt=internal,filler,foldcolumn:3
+! :set diffopt-=internal " do NOT use the internal diff parser
+ <
+ *'digraph'* *'dg'* *'nodigraph'* *'nodg'*
+ 'digraph' 'dg' boolean (default off)
+*** ../vim-8.1.0359/src/Make_cyg_ming.mak 2018-06-30 16:25:00.551755794 +0200
+--- src/Make_cyg_ming.mak 2018-09-10 17:29:26.599063750 +0200
+***************
+*** 166,171 ****
+--- 166,190 ----
+ ifndef CROSS_COMPILE
+ CROSS_COMPILE =
+ endif
++
++ # About the "sh.exe" condition, as explained by Ken Takata:
++ #
++ # If the makefile is executed with mingw32-make and sh.exe is not found in
++ # $PATH, then $SHELL is set to "sh.exe" (without any path). In this case,
++ # unix-like commands might not work and a dos-style path is needed.
++ #
++ # If the makefile is executed with mingw32-make and sh.exe IS found in $PATH,
++ # then $SHELL is set with the actual path of sh.exe (e.g.
++ # "C:/msys64/usr/bin/sh.exe"). In this case, unix-like commands can be used.
++ #
++ # If it is executed by the "make" command from cmd.exe, $SHELL is set to
++ # "/bin/sh". If the "make" command is in the $PATH, other unix-like commands
++ # might also work.
++ #
++ # If it is executed by the "make" command from a unix-like shell,
++ # $SHELL is set with the unix-style path (e.g. "/bin/bash").
++ # In this case, unix-like commands can be used.
++ #
+ ifneq (sh.exe, $(SHELL))
+ DEL = rm
+ MKDIR = mkdir -p
+***************
+*** 810,815 ****
+--- 829,851 ----
+ $(OUTDIR)/term_vterm.o
+ endif
+
++ # Include xdiff
++ OBJ += $(OUTDIR)/xdiffi.o \
++ $(OUTDIR)/xemit.o \
++ $(OUTDIR)/xprepare.o \
++ $(OUTDIR)/xutils.o \
++ $(OUTDIR)/xhistogram.o \
++ $(OUTDIR)/xpatience.o
++
++ XDIFF_DEPS = \
++ xdiff/xdiff.h \
++ xdiff/xdiffi.h \
++ xdiff/xemit.h \
++ xdiff/xinclude.h \
++ xdiff/xmacros.h \
++ xdiff/xprepare.h \
++ xdiff/xtypes.h \
++ xdiff/xutils.h
+
+ ifdef MZSCHEME
+ MZSCHEME_SUFFIX = Z
+***************
+*** 1055,1060 ****
+--- 1091,1113 ----
+ $(OUTDIR)/term_vterm.o: libvterm/src/vterm.c $(TERM_DEPS)
+ $(CCCTERM) libvterm/src/vterm.c -o $@
+
++ $(OUTDIR)/xdiffi.o: xdiff/xdiffi.c $(XDIFF_DEPS)
++ $(CC) -c $(CFLAGS) xdiff/xdiffi.c -o $(OUTDIR)/xdiffi.o
++
++ $(OUTDIR)/xemit.o: xdiff/xemit.c $(XDIFF_DEPS)
++ $(CC) -c $(CFLAGS) xdiff/xemit.c -o $(OUTDIR)/xemit.o
++
++ $(OUTDIR)/xprepare.o: xdiff/xprepare.c $(XDIFF_DEPS)
++ $(CC) -c $(CFLAGS) xdiff/xprepare.c -o $(OUTDIR)/xprepare.o
++
++ $(OUTDIR)/xutils.o: xdiff/xutils.c $(XDIFF_DEPS)
++ $(CC) -c $(CFLAGS) xdiff/xutils.c -o $(OUTDIR)/xutils.o
++
++ $(OUTDIR)/xhistogram.o: xdiff/xhistogram.c $(XDIFF_DEPS)
++ $(CC) -c $(CFLAGS) xdiff/xhistogram.c -o $(OUTDIR)/xhistogram.o
++
++ $(OUTDIR)/xpatience.o: xdiff/xpatience.c $(XDIFF_DEPS)
++ $(CC) -c $(CFLAGS) xdiff/xpatience.c -o $(OUTDIR)/xpatience.o
+
+ pathdef.c: $(INCL)
+ ifneq (sh.exe, $(SHELL))
+*** ../vim-8.1.0359/src/Make_mvc.mak 2018-07-04 23:05:19.221931527 +0200
+--- src/Make_mvc.mak 2018-09-10 17:32:03.885044447 +0200
+***************
+*** 813,818 ****
+--- 813,836 ----
+ !endif
+ SUBSYSTEM_TOOLS = console
+
++ XDIFF_OBJ = $(OBJDIR)/xdiffi.obj \
++ $(OBJDIR)/xemit.obj \
++ $(OBJDIR)/xprepare.obj \
++ $(OBJDIR)/xutils.obj \
++ $(OBJDIR)/xhistogram.obj \
++ $(OBJDIR)/xpatience.obj
++
++ XDIFF_DEPS = \
++ xdiff/xdiff.h \
++ xdiff/xdiffi.h \
++ xdiff/xemit.h \
++ xdiff/xinclude.h \
++ xdiff/xmacros.h \
++ xdiff/xprepare.h \
++ xdiff/xtypes.h \
++ xdiff/xutils.h
++
++
+ !if "$(SUBSYSTEM_VER)" != ""
+ SUBSYSTEM = $(SUBSYSTEM),$(SUBSYSTEM_VER)
+ SUBSYSTEM_TOOLS = $(SUBSYSTEM_TOOLS),$(SUBSYSTEM_VER)
+***************
+*** 1204,1215 ****
+ tee/tee.exe \
+ GvimExt/gvimext.dll
+
+! $(VIM).exe: $(OUTDIR) $(OBJ) $(GUI_OBJ) $(CUI_OBJ) $(OLE_OBJ) $(OLE_IDL) $(MZSCHEME_OBJ) \
+ $(LUA_OBJ) $(PERL_OBJ) $(PYTHON_OBJ) $(PYTHON3_OBJ) $(RUBY_OBJ) $(TCL_OBJ) \
+ $(CSCOPE_OBJ) $(TERM_OBJ) $(NETBEANS_OBJ) $(CHANNEL_OBJ) $(XPM_OBJ) \
+ version.c version.h
+ $(CC) $(CFLAGS_OUTDIR) version.c
+! $(link) $(LINKARGS1) -out:$(VIM).exe $(OBJ) $(GUI_OBJ) $(CUI_OBJ) $(OLE_OBJ) \
+ $(LUA_OBJ) $(MZSCHEME_OBJ) $(PERL_OBJ) $(PYTHON_OBJ) $(PYTHON3_OBJ) $(RUBY_OBJ) \
+ $(TCL_OBJ) $(CSCOPE_OBJ) $(TERM_OBJ) $(NETBEANS_OBJ) $(CHANNEL_OBJ) \
+ $(XPM_OBJ) $(OUTDIR)\version.obj $(LINKARGS2)
+--- 1222,1233 ----
+ tee/tee.exe \
+ GvimExt/gvimext.dll
+
+! $(VIM).exe: $(OUTDIR) $(OBJ) $(XDIFF_OBJ) $(GUI_OBJ) $(CUI_OBJ) $(OLE_OBJ) $(OLE_IDL) $(MZSCHEME_OBJ) \
+ $(LUA_OBJ) $(PERL_OBJ) $(PYTHON_OBJ) $(PYTHON3_OBJ) $(RUBY_OBJ) $(TCL_OBJ) \
+ $(CSCOPE_OBJ) $(TERM_OBJ) $(NETBEANS_OBJ) $(CHANNEL_OBJ) $(XPM_OBJ) \
+ version.c version.h
+ $(CC) $(CFLAGS_OUTDIR) version.c
+! $(link) $(LINKARGS1) -out:$(VIM).exe $(OBJ) $(XDIFF_OBJ) $(GUI_OBJ) $(CUI_OBJ) $(OLE_OBJ) \
+ $(LUA_OBJ) $(MZSCHEME_OBJ) $(PERL_OBJ) $(PYTHON_OBJ) $(PYTHON3_OBJ) $(RUBY_OBJ) \
+ $(TCL_OBJ) $(CSCOPE_OBJ) $(TERM_OBJ) $(NETBEANS_OBJ) $(CHANNEL_OBJ) \
+ $(XPM_OBJ) $(OUTDIR)\version.obj $(LINKARGS2)
+***************
+*** 1304,1309 ****
+--- 1322,1328 ----
+ $(MAKE) /NOLOGO -f Make_dos.mak nolog
+ $(MAKE) /NOLOGO -f Make_dos.mak $@.res
+ $(MAKE) /NOLOGO -f Make_dos.mak report
++ cat messages
+ cd ..
+
+ ###########################################################################
+***************
+*** 1344,1349 ****
+--- 1363,1386 ----
+
+ $(OUTDIR)/diff.obj: $(OUTDIR) diff.c $(INCL)
+
++ $(OUTDIR)/xdiffi.obj: $(OUTDIR) xdiff/xdiffi.c $(XDIFF_DEPS)
++ $(CC) $(CFLAGS_OUTDIR) xdiff/xdiffi.c
++
++ $(OUTDIR)/xemit.obj: $(OUTDIR) xdiff/xemit.c $(XDIFF_DEPS)
++ $(CC) $(CFLAGS_OUTDIR) xdiff/xemit.c
++
++ $(OUTDIR)/xprepare.obj: $(OUTDIR) xdiff/xprepare.c $(XDIFF_DEPS)
++ $(CC) $(CFLAGS_OUTDIR) xdiff/xprepare.c
++
++ $(OUTDIR)/xutils.obj: $(OUTDIR) xdiff/xutils.c $(XDIFF_DEPS)
++ $(CC) $(CFLAGS_OUTDIR) xdiff/xutils.c
++
++ $(OUTDIR)/xhistogram.obj: $(OUTDIR) xdiff/xhistogram.c $(XDIFF_DEPS)
++ $(CC) $(CFLAGS_OUTDIR) xdiff/xhistogram.c
++
++ $(OUTDIR)/xpatience.obj: $(OUTDIR) xdiff/xpatience.c $(XDIFF_DEPS)
++ $(CC) $(CFLAGS_OUTDIR) xdiff/xpatience.c
++
+ $(OUTDIR)/digraph.obj: $(OUTDIR) digraph.c $(INCL)
+
+ $(OUTDIR)/edit.obj: $(OUTDIR) edit.c $(INCL)
+*** ../vim-8.1.0359/src/Makefile 2018-07-07 22:26:49.306702821 +0200
+--- src/Makefile 2018-09-10 17:32:57.212394678 +0200
+***************
+*** 1400,1405 ****
+--- 1400,1431 ----
+
+ TERM_SRC = libvterm/src/*.c
+
++ XDIFF_SRC = \
++ xdiff/xdiffi.c \
++ xdiff/xemit.c \
++ xdiff/xprepare.c \
++ xdiff/xutils.c \
++ xdiff/xhistogram.c \
++ xdiff/xpatience.c \
++
++ XDIFF_OBJS = \
++ objects/xdiffi.o \
++ objects/xemit.o \
++ objects/xprepare.o \
++ objects/xutils.o \
++ objects/xhistogram.o \
++ objects/xpatience.o \
++
++ XDIFF_INCL = \
++ xdiff/xdiff.h \
++ xdiff/xdiffi.h \
++ xdiff/xemit.h \
++ xdiff/xinclude.h \
++ xdiff/xmacros.h \
++ xdiff/xprepare.h \
++ xdiff/xtypes.h \
++ xdiff/xutils.h \
++
+ ### Command to create dependencies based on #include "..."
+ ### prototype headers are ignored due to -DPROTO, system
+ ### headers #include <...> are ignored if we use the -MM option, as
+***************
+*** 1611,1616 ****
+--- 1637,1643 ----
+ SRC = $(BASIC_SRC) \
+ $(GUI_SRC) \
+ $(TERM_SRC) \
++ $(XDIFF_SRC) \
+ $(HANGULIN_SRC) \
+ $(LUA_SRC) \
+ $(MZSCHEME_SRC) \
+***************
+*** 1728,1733 ****
+--- 1755,1761 ----
+ $(WORKSHOP_OBJ) \
+ $(NETBEANS_OBJ) \
+ $(CHANNEL_OBJ) \
++ $(XDIFF_OBJS) \
+ $(WSDEBUG_OBJ)
+
+ # The files included by tests are not in OBJ_COMMON.
+***************
+*** 2731,2737 ****
+
+ shadow: runtime pixmaps
+ $(MKDIR_P) $(SHADOWDIR)
+! cd $(SHADOWDIR); ln -s ../*.[chm] ../*.in ../*.sh ../*.xs ../*.xbm ../gui_gtk_res.xml ../toolcheck ../proto ../libvterm ../vimtutor ../gvimtutor ../install-sh ../Make_all.mak .
+ mkdir $(SHADOWDIR)/auto
+ cd $(SHADOWDIR)/auto; ln -s ../../auto/configure .
+ $(MKDIR_P) $(SHADOWDIR)/po
+--- 2759,2765 ----
+
+ shadow: runtime pixmaps
+ $(MKDIR_P) $(SHADOWDIR)
+! cd $(SHADOWDIR); ln -s ../*.[chm] ../*.in ../*.sh ../*.xs ../*.xbm ../gui_gtk_res.xml ../toolcheck ../proto ../xdiff ../libvterm ../vimtutor ../gvimtutor ../install-sh ../Make_all.mak .
+ mkdir $(SHADOWDIR)/auto
+ cd $(SHADOWDIR)/auto; ln -s ../../auto/configure .
+ $(MKDIR_P) $(SHADOWDIR)/po
+***************
+*** 2915,2921 ****
+ objects/dict.o: dict.c
+ $(CCC) -o $@ dict.c
+
+! objects/diff.o: diff.c
+ $(CCC) -o $@ diff.c
+
+ objects/digraph.o: digraph.c
+--- 2943,2949 ----
+ objects/dict.o: dict.c
+ $(CCC) -o $@ dict.c
+
+! objects/diff.o: diff.c $(XDIFF_INCL)
+ $(CCC) -o $@ diff.c
+
+ objects/digraph.o: digraph.c
+***************
+*** 3229,3234 ****
+--- 3257,3283 ----
+ objects/term_vterm.o: libvterm/src/vterm.c $(TERM_DEPS)
+ $(CCCTERM) -o $@ libvterm/src/vterm.c
+
++ CCCDIFF = $(CCC_NF) $(ALL_CFLAGS)
++
++ objects/xdiffi.o: xdiff/xdiffi.c $(XDIFF_INCL)
++ $(CCCDIFF) -o $@ xdiff/xdiffi.c
++
++ objects/xprepare.o: xdiff/xprepare.c $(XDIFF_INCL)
++ $(CCCDIFF) -o $@ xdiff/xprepare.c
++
++ objects/xutils.o: xdiff/xutils.c $(XDIFF_INCL)
++ $(CCCDIFF) -o $@ xdiff/xutils.c
++
++ objects/xemit.o: xdiff/xemit.c $(XDIFF_INCL)
++ $(CCCDIFF) -o $@ xdiff/xemit.c
++
++ objects/xhistogram.o: xdiff/xhistogram.c $(XDIFF_INCL)
++ $(CCCDIFF) -o $@ xdiff/xhistogram.c
++
++ objects/xpatience.o: xdiff/xpatience.c $(XDIFF_INCL)
++ $(CCCDIFF) -o $@ xdiff/xpatience.c
++
++
+ ###############################################################################
+ ### MacOS X installation
+ ###
+*** ../vim-8.1.0359/src/diff.c 2018-06-03 14:42:17.840505115 +0200
+--- src/diff.c 2018-09-10 17:36:06.542197741 +0200
+***************
+*** 9,31 ****
+
+ /*
+ * diff.c: code for diff'ing two, three or four buffers.
+ */
+
+ #include "vim.h"
+
+ #if defined(FEAT_DIFF) || defined(PROTO)
+
+ static int diff_busy = FALSE; /* ex_diffgetput() is busy */
+
+ /* flags obtained from the 'diffopt' option */
+! #define DIFF_FILLER 1 /* display filler lines */
+! #define DIFF_ICASE 2 /* ignore case */
+! #define DIFF_IWHITE 4 /* ignore change in white space */
+! #define DIFF_HORIZONTAL 8 /* horizontal splits */
+! #define DIFF_VERTICAL 16 /* vertical splits */
+! #define DIFF_HIDDEN_OFF 32 /* diffoff when hidden */
+ static int diff_flags = DIFF_FILLER;
+
+ #define LBUFLEN 50 /* length of line in diff file */
+
+ static int diff_a_works = MAYBE; /* TRUE when "diff -a" works, FALSE when it
+--- 9,40 ----
+
+ /*
+ * diff.c: code for diff'ing two, three or four buffers.
++ *
++ * There are three ways to diff:
++ * - Shell out to an external diff program, using files.
++ * - Use the compiled-in xdiff library.
++ * - Let 'diffexpr' do the work, using files.
+ */
+
+ #include "vim.h"
++ #include "xdiff/xdiff.h"
+
+ #if defined(FEAT_DIFF) || defined(PROTO)
+
+ static int diff_busy = FALSE; /* ex_diffgetput() is busy */
+
+ /* flags obtained from the 'diffopt' option */
+! #define DIFF_FILLER 1 // display filler lines
+! #define DIFF_ICASE 2 // ignore case
+! #define DIFF_IWHITE 4 // ignore change in white space
+! #define DIFF_HORIZONTAL 8 // horizontal splits
+! #define DIFF_VERTICAL 16 // vertical splits
+! #define DIFF_HIDDEN_OFF 32 // diffoff when hidden
+! #define DIFF_INTERNAL 64 // use internal xdiff algorithm
+ static int diff_flags = DIFF_FILLER;
+
++ static long diff_algorithm = 0;
++
+ #define LBUFLEN 50 /* length of line in diff file */
+
+ static int diff_a_works = MAYBE; /* TRUE when "diff -a" works, FALSE when it
+***************
+*** 36,57 ****
+ checked yet */
+ #endif
+
+ static int diff_buf_idx(buf_T *buf);
+ static int diff_buf_idx_tp(buf_T *buf, tabpage_T *tp);
+ static void diff_mark_adjust_tp(tabpage_T *tp, int idx, linenr_T line1, linenr_T line2, long amount, long amount_after);
+ static void diff_check_unchanged(tabpage_T *tp, diff_T *dp);
+ static int diff_check_sanity(tabpage_T *tp, diff_T *dp);
+ static void diff_redraw(int dofold);
+! static int diff_write(buf_T *buf, char_u *fname);
+! static void diff_file(char_u *tmp_orig, char_u *tmp_new, char_u *tmp_diff);
+ static int diff_equal_entry(diff_T *dp, int idx1, int idx2);
+ static int diff_cmp(char_u *s1, char_u *s2);
+ #ifdef FEAT_FOLDING
+ static void diff_fold_update(diff_T *dp, int skip_idx);
+ #endif
+! static void diff_read(int idx_orig, int idx_new, char_u *fname);
+ static void diff_copy_entry(diff_T *dprev, diff_T *dp, int idx_orig, int idx_new);
+ static diff_T *diff_alloc_new(tabpage_T *tp, diff_T *dprev, diff_T *dp);
+
+ #ifndef USE_CR
+ # define tag_fgets vim_fgets
+--- 45,89 ----
+ checked yet */
+ #endif
+
++ // used for diff input
++ typedef struct {
++ char_u *din_fname; // used for external diff
++ mmfile_t din_mmfile; // used for internal diff
++ } diffin_T;
++
++ // used for diff result
++ typedef struct {
++ char_u *dout_fname; // used for external diff
++ garray_T dout_ga; // used for internal diff
++ } diffout_T;
++
++ // two diff inputs and one result
++ typedef struct {
++ diffin_T dio_orig; // original file input
++ diffin_T dio_new; // new file input
++ diffout_T dio_diff; // diff result
++ int dio_internal; // using internal diff
++ } diffio_T;
++
+ static int diff_buf_idx(buf_T *buf);
+ static int diff_buf_idx_tp(buf_T *buf, tabpage_T *tp);
+ static void diff_mark_adjust_tp(tabpage_T *tp, int idx, linenr_T line1, linenr_T line2, long amount, long amount_after);
+ static void diff_check_unchanged(tabpage_T *tp, diff_T *dp);
+ static int diff_check_sanity(tabpage_T *tp, diff_T *dp);
+ static void diff_redraw(int dofold);
+! static int check_external_diff(diffio_T *diffio);
+! static int diff_file(diffio_T *diffio);
+ static int diff_equal_entry(diff_T *dp, int idx1, int idx2);
+ static int diff_cmp(char_u *s1, char_u *s2);
+ #ifdef FEAT_FOLDING
+ static void diff_fold_update(diff_T *dp, int skip_idx);
+ #endif
+! static void diff_read(int idx_orig, int idx_new, diffout_T *fname);
+ static void diff_copy_entry(diff_T *dprev, diff_T *dp, int idx_orig, int idx_new);
+ static diff_T *diff_alloc_new(tabpage_T *tp, diff_T *dprev, diff_T *dp);
++ static int parse_diff_ed(char_u *line, linenr_T *lnum_orig, long *count_orig, linenr_T *lnum_new, long *count_new);
++ static int parse_diff_unified(char_u *line, linenr_T *lnum_orig, long *count_orig, linenr_T *lnum_new, long *count_new);
++ static int xdiff_out(void *priv, mmbuffer_t *mb, int nbuf);
+
+ #ifndef USE_CR
+ # define tag_fgets vim_fgets
+***************
+*** 631,711 ****
+ }
+ }
+
+ /*
+! * Write buffer "buf" to file "name".
+! * Always use 'fileformat' set to "unix".
+! * Return FAIL for failure
+ */
+ static int
+! diff_write(buf_T *buf, char_u *fname)
+ {
+ int r;
+ char_u *save_ff;
+
+ save_ff = buf->b_p_ff;
+ buf->b_p_ff = vim_strsave((char_u *)FF_UNIX);
+! r = buf_write(buf, fname, NULL, (linenr_T)1, buf->b_ml.ml_line_count,
+! NULL, FALSE, FALSE, FALSE, TRUE);
+ free_string_option(buf->b_p_ff);
+ buf->b_p_ff = save_ff;
+ return r;
+ }
+
+ /*
+ * Completely update the diffs for the buffers involved.
+ * This uses the ordinary "diff" command.
+ * The buffers are written to a file, also for unmodified buffers (the file
+ * could have been produced by autocommands, e.g. the netrw plugin).
+ */
+ void
+! ex_diffupdate(
+! exarg_T *eap) /* can be NULL */
+ {
+- buf_T *buf;
+ int idx_orig;
+ int idx_new;
+! char_u *tmp_orig;
+! char_u *tmp_new;
+! char_u *tmp_diff;
+! FILE *fd;
+! int ok;
+! int io_error = FALSE;
+
+! /* Delete all diffblocks. */
+ diff_clear(curtab);
+ curtab->tp_diff_invalid = FALSE;
+
+! /* Use the first buffer as the original text. */
+ for (idx_orig = 0; idx_orig < DB_COUNT; ++idx_orig)
+ if (curtab->tp_diffbuf[idx_orig] != NULL)
+ break;
+ if (idx_orig == DB_COUNT)
+ return;
+
+! /* Only need to do something when there is another buffer. */
+ for (idx_new = idx_orig + 1; idx_new < DB_COUNT; ++idx_new)
+ if (curtab->tp_diffbuf[idx_new] != NULL)
+ break;
+ if (idx_new == DB_COUNT)
+ return;
+
+! /* We need three temp file names. */
+! tmp_orig = vim_tempname('o', TRUE);
+! tmp_new = vim_tempname('n', TRUE);
+! tmp_diff = vim_tempname('d', TRUE);
+! if (tmp_orig == NULL || tmp_new == NULL || tmp_diff == NULL)
+! goto theend;
+
+! /*
+! * Do a quick test if "diff" really works. Otherwise it looks like there
+! * are no differences. Can't use the return value, it's non-zero when
+! * there are differences.
+! * May try twice, first with "-a" and then without.
+! */
+ for (;;)
+ {
+ ok = FALSE;
+! fd = mch_fopen((char *)tmp_orig, "w");
+ if (fd == NULL)
+ io_error = TRUE;
+ else
+--- 663,952 ----
+ }
+ }
+
++ static void
++ clear_diffin(diffin_T *din)
++ {
++ if (din->din_fname == NULL)
++ {
++ vim_free(din->din_mmfile.ptr);
++ din->din_mmfile.ptr = NULL;
++ }
++ else
++ mch_remove(din->din_fname);
++ }
++
++ static void
++ clear_diffout(diffout_T *dout)
++ {
++ if (dout->dout_fname == NULL)
++ ga_clear_strings(&dout->dout_ga);
++ else
++ mch_remove(dout->dout_fname);
++ }
++
+ /*
+! * Write buffer "buf" to a memory buffer.
+! * Return FAIL for failure.
+ */
+ static int
+! diff_write_buffer(buf_T *buf, diffin_T *din)
+! {
+! linenr_T lnum;
+! char_u *s;
+! long len = 0;
+! char_u *ptr;
+!
+! // xdiff requires one big block of memory with all the text.
+! for (lnum = 1; lnum <= buf->b_ml.ml_line_count; ++lnum)
+! len += STRLEN(ml_get_buf(buf, lnum, FALSE)) + 1;
+! ptr = lalloc(len, TRUE);
+! if (ptr == NULL)
+! {
+! // Allocating memory failed. This can happen, because we try to read
+! // the whole buffer text into memory. Set the failed flag, the diff
+! // will be retried with external diff. The flag is never reset.
+! buf->b_diff_failed = TRUE;
+! if (p_verbose > 0)
+! {
+! verbose_enter();
+! smsg((char_u *)
+! _("Not enough memory to use internal diff for buffer \"%s\""),
+! buf->b_fname);
+! verbose_leave();
+! }
+! return FAIL;
+! }
+! din->din_mmfile.ptr = (char *)ptr;
+! din->din_mmfile.size = len;
+!
+! len = 0;
+! for (lnum = 1; lnum <= buf->b_ml.ml_line_count; ++lnum)
+! {
+! for (s = ml_get_buf(buf, lnum, FALSE); *s != NUL; )
+! {
+! if (diff_flags & DIFF_ICASE)
+! {
+! int c;
+!
+! // xdiff doesn't support ignoring case, fold-case the text.
+! #ifdef FEAT_MBYTE
+! int orig_len;
+! char_u cbuf[MB_MAXBYTES + 1];
+!
+! c = PTR2CHAR(s);
+! c = enc_utf8 ? utf_fold(c) : MB_TOLOWER(c);
+! orig_len = MB_PTR2LEN(s);
+! if (mb_char2bytes(c, cbuf) != orig_len)
+! // TODO: handle byte length difference
+! mch_memmove(ptr + len, s, orig_len);
+! else
+! mch_memmove(ptr + len, cbuf, orig_len);
+!
+! s += orig_len;
+! len += orig_len;
+! #else
+! c = *s++;
+! ptr[len++] = TOLOWER_LOC(c);
+! #endif
+! }
+! else
+! ptr[len++] = *s++;
+! }
+! ptr[len++] = NL;
+! }
+! return OK;
+! }
+!
+! /*
+! * Write buffer "buf" to file or memory buffer.
+! * Return FAIL for failure.
+! */
+! static int
+! diff_write(buf_T *buf, diffin_T *din)
+ {
+ int r;
+ char_u *save_ff;
+
++ if (din->din_fname == NULL)
++ return diff_write_buffer(buf, din);
++
++ // Always use 'fileformat' set to "unix".
+ save_ff = buf->b_p_ff;
+ buf->b_p_ff = vim_strsave((char_u *)FF_UNIX);
+! r = buf_write(buf, din->din_fname, NULL,
+! (linenr_T)1, buf->b_ml.ml_line_count,
+! NULL, FALSE, FALSE, FALSE, TRUE);
+ free_string_option(buf->b_p_ff);
+ buf->b_p_ff = save_ff;
+ return r;
+ }
+
+ /*
++ * Update the diffs for all buffers involved.
++ */
++ static void
++ diff_try_update(
++ diffio_T *dio,
++ int idx_orig,
++ exarg_T *eap) // "eap" can be NULL
++ {
++ buf_T *buf;
++ int idx_new;
++
++ if (dio->dio_internal)
++ {
++ ga_init2(&dio->dio_diff.dout_ga, sizeof(char *), 1000);
++ }
++ else
++ {
++ // We need three temp file names.
++ dio->dio_orig.din_fname = vim_tempname('o', TRUE);
++ dio->dio_new.din_fname = vim_tempname('n', TRUE);
++ dio->dio_diff.dout_fname = vim_tempname('d', TRUE);
++ if (dio->dio_orig.din_fname == NULL
++ || dio->dio_new.din_fname == NULL
++ || dio->dio_diff.dout_fname == NULL)
++ goto theend;
++ }
++
++ // Check external diff is actually working.
++ if (!dio->dio_internal && check_external_diff(dio) == FAIL)
++ goto theend;
++
++ // :diffupdate!
++ if (eap != NULL && eap->forceit)
++ for (idx_new = idx_orig; idx_new < DB_COUNT; ++idx_new)
++ {
++ buf = curtab->tp_diffbuf[idx_new];
++ if (buf_valid(buf))
++ buf_check_timestamp(buf, FALSE);
++ }
++
++ // Write the first buffer to a tempfile or mmfile_t.
++ buf = curtab->tp_diffbuf[idx_orig];
++ if (diff_write(buf, &dio->dio_orig) == FAIL)
++ goto theend;
++
++ // Make a difference between the first buffer and every other.
++ for (idx_new = idx_orig + 1; idx_new < DB_COUNT; ++idx_new)
++ {
++ buf = curtab->tp_diffbuf[idx_new];
++ if (buf == NULL || buf->b_ml.ml_mfp == NULL)
++ continue; // skip buffer that isn't loaded
++
++ // Write the other buffer and diff with the first one.
++ if (diff_write(buf, &dio->dio_new) == FAIL)
++ continue;
++ if (diff_file(dio) == FAIL)
++ continue;
++
++ // Read the diff output and add each entry to the diff list.
++ diff_read(idx_orig, idx_new, &dio->dio_diff);
++
++ clear_diffin(&dio->dio_new);
++ clear_diffout(&dio->dio_diff);
++ }
++ clear_diffin(&dio->dio_orig);
++
++ theend:
++ vim_free(dio->dio_orig.din_fname);
++ vim_free(dio->dio_new.din_fname);
++ vim_free(dio->dio_diff.dout_fname);
++ }
++
++ /*
++ * Return TRUE if the options are set to use the internal diff library.
++ * Note that if the internal diff failed for one of the buffers, the external
++ * diff will be used anyway.
++ */
++ static int
++ diff_internal(void)
++ {
++ return (diff_flags & DIFF_INTERNAL) != 0 && *p_dex == NUL;
++ }
++
++ /*
++ * Return TRUE if the internal diff failed for one of the diff buffers.
++ */
++ static int
++ diff_internal_failed(void)
++ {
++ int idx;
++
++ // Only need to do something when there is another buffer.
++ for (idx = 0; idx < DB_COUNT; ++idx)
++ if (curtab->tp_diffbuf[idx] != NULL
++ && curtab->tp_diffbuf[idx]->b_diff_failed)
++ return TRUE;
++ return FALSE;
++ }
++
++ /*
+ * Completely update the diffs for the buffers involved.
+ * This uses the ordinary "diff" command.
+ * The buffers are written to a file, also for unmodified buffers (the file
+ * could have been produced by autocommands, e.g. the netrw plugin).
+ */
+ void
+! ex_diffupdate(exarg_T *eap) // "eap" can be NULL
+ {
+ int idx_orig;
+ int idx_new;
+! diffio_T diffio;
+
+! // Delete all diffblocks.
+ diff_clear(curtab);
+ curtab->tp_diff_invalid = FALSE;
+
+! // Use the first buffer as the original text.
+ for (idx_orig = 0; idx_orig < DB_COUNT; ++idx_orig)
+ if (curtab->tp_diffbuf[idx_orig] != NULL)
+ break;
+ if (idx_orig == DB_COUNT)
+ return;
+
+! // Only need to do something when there is another buffer.
+ for (idx_new = idx_orig + 1; idx_new < DB_COUNT; ++idx_new)
+ if (curtab->tp_diffbuf[idx_new] != NULL)
+ break;
+ if (idx_new == DB_COUNT)
+ return;
+
+! // Only use the internal method if it did not fail for one of the buffers.
+! vim_memset(&diffio, 0, sizeof(diffio));
+! diffio.dio_internal = diff_internal() && !diff_internal_failed();
+!
+! diff_try_update(&diffio, idx_orig, eap);
+! if (diffio.dio_internal && diff_internal_failed())
+! {
+! // Internal diff failed, use external diff instead.
+! vim_memset(&diffio, 0, sizeof(diffio));
+! diff_try_update(&diffio, idx_orig, eap);
+! }
+
+! // force updating cursor position on screen
+! curwin->w_valid_cursor.lnum = 0;
+!
+! diff_redraw(TRUE);
+! }
+!
+! /*
+! * Do a quick test if "diff" really works. Otherwise it looks like there
+! * are no differences. Can't use the return value, it's non-zero when
+! * there are differences.
+! */
+! static int
+! check_external_diff(diffio_T *diffio)
+! {
+! FILE *fd;
+! int ok;
+! int io_error = FALSE;
+!
+! // May try twice, first with "-a" and then without.
+ for (;;)
+ {
+ ok = FALSE;
+! fd = mch_fopen((char *)diffio->dio_orig.din_fname, "w");
+ if (fd == NULL)
+ io_error = TRUE;
+ else
+***************
+*** 713,719 ****
+ if (fwrite("line1\n", (size_t)6, (size_t)1, fd) != 1)
+ io_error = TRUE;
+ fclose(fd);
+! fd = mch_fopen((char *)tmp_new, "w");
+ if (fd == NULL)
+ io_error = TRUE;
+ else
+--- 954,960 ----
+ if (fwrite("line1\n", (size_t)6, (size_t)1, fd) != 1)
+ io_error = TRUE;
+ fclose(fd);
+! fd = mch_fopen((char *)diffio->dio_new.din_fname, "w");
+ if (fd == NULL)
+ io_error = TRUE;
+ else
+***************
+*** 721,728 ****
+ if (fwrite("line2\n", (size_t)6, (size_t)1, fd) != 1)
+ io_error = TRUE;
+ fclose(fd);
+! diff_file(tmp_orig, tmp_new, tmp_diff);
+! fd = mch_fopen((char *)tmp_diff, "r");
+ if (fd == NULL)
+ io_error = TRUE;
+ else
+--- 962,970 ----
+ if (fwrite("line2\n", (size_t)6, (size_t)1, fd) != 1)
+ io_error = TRUE;
+ fclose(fd);
+! fd = NULL;
+! if (diff_file(diffio) == OK)
+! fd = mch_fopen((char *)diffio->dio_diff.dout_fname, "r");
+ if (fd == NULL)
+ io_error = TRUE;
+ else
+***************
+*** 739,748 ****
+ }
+ fclose(fd);
+ }
+! mch_remove(tmp_diff);
+! mch_remove(tmp_new);
+ }
+! mch_remove(tmp_orig);
+ }
+
+ #ifdef FEAT_EVAL
+--- 981,990 ----
+ }
+ fclose(fd);
+ }
+! mch_remove(diffio->dio_diff.dout_fname);
+! mch_remove(diffio->dio_new.din_fname);
+ }
+! mch_remove(diffio->dio_orig.din_fname);
+ }
+
+ #ifdef FEAT_EVAL
+***************
+*** 785,882 ****
+ #if defined(MSWIN)
+ diff_bin_works = MAYBE;
+ #endif
+! goto theend;
+ }
+
+! /* :diffupdate! */
+! if (eap != NULL && eap->forceit)
+! for (idx_new = idx_orig; idx_new < DB_COUNT; ++idx_new)
+! {
+! buf = curtab->tp_diffbuf[idx_new];
+! if (buf_valid(buf))
+! buf_check_timestamp(buf, FALSE);
+! }
+!
+! /* Write the first buffer to a tempfile. */
+! buf = curtab->tp_diffbuf[idx_orig];
+! if (diff_write(buf, tmp_orig) == FAIL)
+! goto theend;
+!
+! /* Make a difference between the first buffer and every other. */
+! for (idx_new = idx_orig + 1; idx_new < DB_COUNT; ++idx_new)
+! {
+! buf = curtab->tp_diffbuf[idx_new];
+! if (buf == NULL || buf->b_ml.ml_mfp == NULL)
+! continue; /* skip buffer that isn't loaded */
+! if (diff_write(buf, tmp_new) == FAIL)
+! continue;
+! diff_file(tmp_orig, tmp_new, tmp_diff);
+
+! /* Read the diff output and add each entry to the diff list. */
+! diff_read(idx_orig, idx_new, tmp_diff);
+! mch_remove(tmp_diff);
+! mch_remove(tmp_new);
+! }
+! mch_remove(tmp_orig);
+
+! /* force updating cursor position on screen */
+! curwin->w_valid_cursor.lnum = 0;
+
+! diff_redraw(TRUE);
+
+! theend:
+! vim_free(tmp_orig);
+! vim_free(tmp_new);
+! vim_free(tmp_diff);
+ }
+
+ /*
+ * Make a diff between files "tmp_orig" and "tmp_new", results in "tmp_diff".
+ */
+! static void
+! diff_file(
+! char_u *tmp_orig,
+! char_u *tmp_new,
+! char_u *tmp_diff)
+ {
+ char_u *cmd;
+ size_t len;
+
+ #ifdef FEAT_EVAL
+ if (*p_dex != NUL)
+! /* Use 'diffexpr' to generate the diff file. */
+ eval_diff(tmp_orig, tmp_new, tmp_diff);
+ else
+ #endif
+ {
+ len = STRLEN(tmp_orig) + STRLEN(tmp_new)
+ + STRLEN(tmp_diff) + STRLEN(p_srr) + 27;
+ cmd = alloc((unsigned)len);
+! if (cmd != NULL)
+! {
+! /* We don't want $DIFF_OPTIONS to get in the way. */
+! if (getenv("DIFF_OPTIONS"))
+! vim_setenv((char_u *)"DIFF_OPTIONS", (char_u *)"");
+!
+! /* Build the diff command and execute it. Always use -a, binary
+! * differences are of no use. Ignore errors, diff returns
+! * non-zero when differences have been found. */
+! vim_snprintf((char *)cmd, len, "diff %s%s%s%s%s %s",
+! diff_a_works == FALSE ? "" : "-a ",
+ #if defined(MSWIN)
+! diff_bin_works == TRUE ? "--binary " : "",
+ #else
+! "",
+ #endif
+! (diff_flags & DIFF_IWHITE) ? "-b " : "",
+! (diff_flags & DIFF_ICASE) ? "-i " : "",
+! tmp_orig, tmp_new);
+! append_redir(cmd, (int)len, p_srr, tmp_diff);
+! block_autocmds(); /* Avoid ShellCmdPost stuff */
+! (void)call_shell(cmd, SHELL_FILTER|SHELL_SILENT|SHELL_DOOUT);
+! unblock_autocmds();
+! vim_free(cmd);
+! }
+ }
+ }
+
+--- 1027,1127 ----
+ #if defined(MSWIN)
+ diff_bin_works = MAYBE;
+ #endif
+! return FAIL;
+ }
++ return OK;
++ }
+
+! /*
+! * Invoke the xdiff function.
+! */
+! static int
+! diff_file_internal(diffio_T *diffio)
+! {
+! xpparam_t param;
+! xdemitconf_t emit_cfg;
+! xdemitcb_t emit_cb;
+
+! vim_memset(&param, 0, sizeof(param));
+! vim_memset(&emit_cfg, 0, sizeof(emit_cfg));
+! vim_memset(&emit_cb, 0, sizeof(emit_cb));
+
+! param.flags = diff_algorithm;
+
+! if (diff_flags & DIFF_IWHITE)
+! param.flags |= XDF_IGNORE_WHITESPACE_CHANGE;
+
+! emit_cfg.ctxlen = 0; // don't need any diff_context here
+! emit_cb.priv = &diffio->dio_diff;
+! emit_cb.outf = xdiff_out;
+! if (xdl_diff(&diffio->dio_orig.din_mmfile,
+! &diffio->dio_new.din_mmfile,
+! &param, &emit_cfg, &emit_cb) < 0)
+! {
+! EMSG(_("E960: Problem creating the internal diff"));
+! return FAIL;
+! }
+! return OK;
+ }
+
+ /*
+ * Make a diff between files "tmp_orig" and "tmp_new", results in "tmp_diff".
++ * return OK or FAIL;
+ */
+! static int
+! diff_file(diffio_T *dio)
+ {
+ char_u *cmd;
+ size_t len;
++ char_u *tmp_orig = dio->dio_orig.din_fname;
++ char_u *tmp_new = dio->dio_new.din_fname;
++ char_u *tmp_diff = dio->dio_diff.dout_fname;
+
+ #ifdef FEAT_EVAL
+ if (*p_dex != NUL)
+! {
+! // Use 'diffexpr' to generate the diff file.
+ eval_diff(tmp_orig, tmp_new, tmp_diff);
++ return OK;
++ }
+ else
+ #endif
++ // Use xdiff for generating the diff.
++ if (dio->dio_internal)
++ {
++ return diff_file_internal(dio);
++ }
++ else
+ {
+ len = STRLEN(tmp_orig) + STRLEN(tmp_new)
+ + STRLEN(tmp_diff) + STRLEN(p_srr) + 27;
+ cmd = alloc((unsigned)len);
+! if (cmd == NULL)
+! return FAIL;
+!
+! // We don't want $DIFF_OPTIONS to get in the way.
+! if (getenv("DIFF_OPTIONS"))
+! vim_setenv((char_u *)"DIFF_OPTIONS", (char_u *)"");
+!
+! // Build the diff command and execute it. Always use -a, binary
+! // differences are of no use. Ignore errors, diff returns
+! // non-zero when differences have been found.
+! vim_snprintf((char *)cmd, len, "diff %s%s%s%s%s %s",
+! diff_a_works == FALSE ? "" : "-a ",
+ #if defined(MSWIN)
+! diff_bin_works == TRUE ? "--binary " : "",
+ #else
+! "",
+ #endif
+! (diff_flags & DIFF_IWHITE) ? "-b " : "",
+! (diff_flags & DIFF_ICASE) ? "-i " : "",
+! tmp_orig, tmp_new);
+! append_redir(cmd, (int)len, p_srr, tmp_diff);
+! block_autocmds(); // avoid ShellCmdPost stuff
+! (void)call_shell(cmd, SHELL_FILTER|SHELL_SILENT|SHELL_DOOUT);
+! unblock_autocmds();
+! vim_free(cmd);
+! return OK;
+ }
+ }
+
+***************
+*** 1282,1370 ****
+ */
+ static void
+ diff_read(
+! int idx_orig, /* idx of original file */
+! int idx_new, /* idx of new file */
+! char_u *fname) /* name of diff output file */
+ {
+! FILE *fd;
+ diff_T *dprev = NULL;
+ diff_T *dp = curtab->tp_first_diff;
+ diff_T *dn, *dpl;
+- long f1, l1, f2, l2;
+ char_u linebuf[LBUFLEN]; /* only need to hold the diff line */
+! int difftype;
+! char_u *p;
+ long off;
+ int i;
+ linenr_T lnum_orig, lnum_new;
+ long count_orig, count_new;
+ int notset = TRUE; /* block "*dp" not set yet */
+
+! fd = mch_fopen((char *)fname, "r");
+! if (fd == NULL)
+ {
+! EMSG(_("E98: Cannot read diff output"));
+! return;
+ }
+!
+! for (;;)
+ {
+! if (tag_fgets(linebuf, LBUFLEN, fd))
+! break; /* end of file */
+! if (!isdigit(*linebuf))
+! continue; /* not the start of a diff block */
+!
+! /* This line must be one of three formats:
+! * {first}[,{last}]c{first}[,{last}]
+! * {first}a{first}[,{last}]
+! * {first}[,{last}]d{first}
+! */
+! p = linebuf;
+! f1 = getdigits(&p);
+! if (*p == ',')
+! {
+! ++p;
+! l1 = getdigits(&p);
+! }
+! else
+! l1 = f1;
+! if (*p != 'a' && *p != 'c' && *p != 'd')
+! continue; /* invalid diff format */
+! difftype = *p++;
+! f2 = getdigits(&p);
+! if (*p == ',')
+ {
+! ++p;
+! l2 = getdigits(&p);
+ }
+! else
+! l2 = f2;
+! if (l1 < f1 || l2 < f2)
+! continue; /* invalid line range */
+
+! if (difftype == 'a')
+ {
+! lnum_orig = f1 + 1;
+! count_orig = 0;
+ }
+ else
+ {
+! lnum_orig = f1;
+! count_orig = l1 - f1 + 1;
+ }
+! if (difftype == 'd')
+ {
+! lnum_new = f2 + 1;
+! count_new = 0;
+ }
+ else
+ {
+! lnum_new = f2;
+! count_new = l2 - f2 + 1;
+ }
+
+! /* Go over blocks before the change, for which orig and new are equal.
+! * Copy blocks from orig to new. */
+ while (dp != NULL
+ && lnum_orig > dp->df_lnum[idx_orig] + dp->df_count[idx_orig])
+ {
+--- 1527,1631 ----
+ */
+ static void
+ diff_read(
+! int idx_orig, // idx of original file
+! int idx_new, // idx of new file
+! diffout_T *dout) // diff output
+ {
+! FILE *fd = NULL;
+! int line_idx = 0;
+ diff_T *dprev = NULL;
+ diff_T *dp = curtab->tp_first_diff;
+ diff_T *dn, *dpl;
+ char_u linebuf[LBUFLEN]; /* only need to hold the diff line */
+! char_u *line;
+ long off;
+ int i;
+ linenr_T lnum_orig, lnum_new;
+ long count_orig, count_new;
+ int notset = TRUE; /* block "*dp" not set yet */
++ enum {
++ DIFF_ED,
++ DIFF_UNIFIED,
++ DIFF_NONE
++ } diffstyle = DIFF_NONE;
+
+! if (dout->dout_fname == NULL)
+ {
+! diffstyle = DIFF_UNIFIED;
+ }
+! else
+ {
+! fd = mch_fopen((char *)dout->dout_fname, "r");
+! if (fd == NULL)
+ {
+! EMSG(_("E98: Cannot read diff output"));
+! return;
+ }
+! }
+
+! for (;;)
+! {
+! if (fd == NULL)
+ {
+! if (line_idx >= dout->dout_ga.ga_len)
+! break; // did last line
+! line = ((char_u **)dout->dout_ga.ga_data)[line_idx++];
+ }
+ else
+ {
+! if (tag_fgets(linebuf, LBUFLEN, fd))
+! break; // end of file
+! line = linebuf;
+! }
+!
+! if (diffstyle == DIFF_NONE)
+! {
+! // Determine diff style.
+! // ed like diff looks like this:
+! // {first}[,{last}]c{first}[,{last}]
+! // {first}a{first}[,{last}]
+! // {first}[,{last}]d{first}
+! //
+! // unified diff looks like this:
+! // --- file1 2018-03-20 13:23:35.783153140 +0100
+! // +++ file2 2018-03-20 13:23:41.183156066 +0100
+! // @@ -1,3 +1,5 @@
+! if (isdigit(*line))
+! diffstyle = DIFF_ED;
+! else if ((STRNCMP(line, "@@ ", 3) == 0))
+! diffstyle = DIFF_UNIFIED;
+! else if ((STRNCMP(line, "--- ", 4) == 0)
+! && (tag_fgets(linebuf, LBUFLEN, fd) == 0)
+! && (STRNCMP(line, "+++ ", 4) == 0)
+! && (tag_fgets(linebuf, LBUFLEN, fd) == 0)
+! && (STRNCMP(line, "@@ ", 3) == 0))
+! diffstyle = DIFF_UNIFIED;
+! }
+!
+! if (diffstyle == DIFF_ED)
+! {
+! if (!isdigit(*line))
+! continue; // not the start of a diff block
+! if (parse_diff_ed(line, &lnum_orig, &count_orig,
+! &lnum_new, &count_new) == FAIL)
+! continue;
+ }
+! else if (diffstyle == DIFF_UNIFIED)
+ {
+! if (STRNCMP(line, "@@ ", 3) != 0)
+! continue; // not the start of a diff block
+! if (parse_diff_unified(line, &lnum_orig, &count_orig,
+! &lnum_new, &count_new) == FAIL)
+! continue;
+ }
+ else
+ {
+! EMSG(_("E959: Invalid diff format."));
+! break;
+ }
+
+! // Go over blocks before the change, for which orig and new are equal.
+! // Copy blocks from orig to new.
+ while (dp != NULL
+ && lnum_orig > dp->df_lnum[idx_orig] + dp->df_count[idx_orig])
+ {
+***************
+*** 1379,1392 ****
+ && lnum_orig <= dp->df_lnum[idx_orig] + dp->df_count[idx_orig]
+ && lnum_orig + count_orig >= dp->df_lnum[idx_orig])
+ {
+! /* New block overlaps with existing block(s).
+! * First find last block that overlaps. */
+ for (dpl = dp; dpl->df_next != NULL; dpl = dpl->df_next)
+ if (lnum_orig + count_orig < dpl->df_next->df_lnum[idx_orig])
+ break;
+
+! /* If the newly found block starts before the old one, set the
+! * start back a number of lines. */
+ off = dp->df_lnum[idx_orig] - lnum_orig;
+ if (off > 0)
+ {
+--- 1640,1653 ----
+ && lnum_orig <= dp->df_lnum[idx_orig] + dp->df_count[idx_orig]
+ && lnum_orig + count_orig >= dp->df_lnum[idx_orig])
+ {
+! // New block overlaps with existing block(s).
+! // First find last block that overlaps.
+ for (dpl = dp; dpl->df_next != NULL; dpl = dpl->df_next)
+ if (lnum_orig + count_orig < dpl->df_next->df_lnum[idx_orig])
+ break;
+
+! // If the newly found block starts before the old one, set the
+! // start back a number of lines.
+ off = dp->df_lnum[idx_orig] - lnum_orig;
+ if (off > 0)
+ {
+***************
+*** 1398,1421 ****
+ }
+ else if (notset)
+ {
+! /* new block inside existing one, adjust new block */
+ dp->df_lnum[idx_new] = lnum_new + off;
+ dp->df_count[idx_new] = count_new - off;
+ }
+ else
+! /* second overlap of new block with existing block */
+ dp->df_count[idx_new] += count_new - count_orig
+ + dpl->df_lnum[idx_orig] + dpl->df_count[idx_orig]
+ - (dp->df_lnum[idx_orig] + dp->df_count[idx_orig]);
+
+! /* Adjust the size of the block to include all the lines to the
+! * end of the existing block or the new diff, whatever ends last. */
+ off = (lnum_orig + count_orig)
+ - (dpl->df_lnum[idx_orig] + dpl->df_count[idx_orig]);
+ if (off < 0)
+ {
+! /* new change ends in existing block, adjust the end if not
+! * done already */
+ if (notset)
+ dp->df_count[idx_new] += -off;
+ off = 0;
+--- 1659,1682 ----
+ }
+ else if (notset)
+ {
+! // new block inside existing one, adjust new block
+ dp->df_lnum[idx_new] = lnum_new + off;
+ dp->df_count[idx_new] = count_new - off;
+ }
+ else
+! // second overlap of new block with existing block
+ dp->df_count[idx_new] += count_new - count_orig
+ + dpl->df_lnum[idx_orig] + dpl->df_count[idx_orig]
+ - (dp->df_lnum[idx_orig] + dp->df_count[idx_orig]);
+
+! // Adjust the size of the block to include all the lines to the
+! // end of the existing block or the new diff, whatever ends last.
+ off = (lnum_orig + count_orig)
+ - (dpl->df_lnum[idx_orig] + dpl->df_count[idx_orig]);
+ if (off < 0)
+ {
+! // new change ends in existing block, adjust the end if not
+! // done already
+ if (notset)
+ dp->df_count[idx_new] += -off;
+ off = 0;
+***************
+*** 1425,1431 ****
+ dp->df_count[i] = dpl->df_lnum[i] + dpl->df_count[i]
+ - dp->df_lnum[i] + off;
+
+! /* Delete the diff blocks that have been merged into one. */
+ dn = dp->df_next;
+ dp->df_next = dpl->df_next;
+ while (dn != dp->df_next)
+--- 1686,1692 ----
+ dp->df_count[i] = dpl->df_lnum[i] + dpl->df_count[i]
+ - dp->df_lnum[i] + off;
+
+! // Delete the diff blocks that have been merged into one.
+ dn = dp->df_next;
+ dp->df_next = dpl->df_next;
+ while (dn != dp->df_next)
+***************
+*** 1437,1443 ****
+ }
+ else
+ {
+! /* Allocate a new diffblock. */
+ dp = diff_alloc_new(curtab, dprev, dp);
+ if (dp == NULL)
+ goto done;
+--- 1698,1704 ----
+ }
+ else
+ {
+! // Allocate a new diffblock.
+ dp = diff_alloc_new(curtab, dprev, dp);
+ if (dp == NULL)
+ goto done;
+***************
+*** 1447,1463 ****
+ dp->df_lnum[idx_new] = lnum_new;
+ dp->df_count[idx_new] = count_new;
+
+! /* Set values for other buffers, these must be equal to the
+! * original buffer, otherwise there would have been a change
+! * already. */
+ for (i = idx_orig + 1; i < idx_new; ++i)
+ if (curtab->tp_diffbuf[i] != NULL)
+ diff_copy_entry(dprev, dp, idx_orig, i);
+ }
+! notset = FALSE; /* "*dp" has been set */
+ }
+
+! /* for remaining diff blocks orig and new are equal */
+ while (dp != NULL)
+ {
+ if (notset)
+--- 1708,1724 ----
+ dp->df_lnum[idx_new] = lnum_new;
+ dp->df_count[idx_new] = count_new;
+
+! // Set values for other buffers, these must be equal to the
+! // original buffer, otherwise there would have been a change
+! // already.
+ for (i = idx_orig + 1; i < idx_new; ++i)
+ if (curtab->tp_diffbuf[i] != NULL)
+ diff_copy_entry(dprev, dp, idx_orig, i);
+ }
+! notset = FALSE; // "*dp" has been set
+ }
+
+! // for remaining diff blocks orig and new are equal
+ while (dp != NULL)
+ {
+ if (notset)
+***************
+*** 1468,1474 ****
+ }
+
+ done:
+! fclose(fd);
+ }
+
+ /*
+--- 1729,1736 ----
+ }
+
+ done:
+! if (fd != NULL)
+! fclose(fd);
+ }
+
+ /*
+***************
+*** 1860,1865 ****
+--- 2122,2128 ----
+ int diff_context_new = 6;
+ int diff_flags_new = 0;
+ int diff_foldcolumn_new = 2;
++ long diff_algorithm_new = 0;
+ tabpage_T *tp;
+
+ p = p_dip;
+***************
+*** 1905,1910 ****
+--- 2168,2208 ----
+ p += 9;
+ diff_flags_new |= DIFF_HIDDEN_OFF;
+ }
++ else if (STRNCMP(p, "indent-heuristic", 16) == 0)
++ {
++ p += 16;
++ diff_algorithm_new |= XDF_INDENT_HEURISTIC;
++ }
++ else if (STRNCMP(p, "internal", 8) == 0)
++ {
++ p += 8;
++ diff_flags_new |= DIFF_INTERNAL;
++ }
++ else if (STRNCMP(p, "algorithm:", 10) == 0)
++ {
++ p += 10;
++ if (STRNCMP(p, "myers", 5) == 0)
++ {
++ p += 5;
++ diff_algorithm_new = 0;
++ }
++ else if (STRNCMP(p, "minimal", 7) == 0)
++ {
++ p += 7;
++ diff_algorithm_new = XDF_NEED_MINIMAL;
++ }
++ else if (STRNCMP(p, "patience", 8) == 0)
++ {
++ p += 8;
++ diff_algorithm_new = XDF_PATIENCE_DIFF;
++ }
++ else if (STRNCMP(p, "histogram", 9) == 0)
++ {
++ p += 9;
++ diff_algorithm_new = XDF_HISTOGRAM_DIFF;
++ }
++ }
++
+ if (*p != ',' && *p != NUL)
+ return FAIL;
+ if (*p == ',')
+***************
+*** 1916,1928 ****
+ return FAIL;
+
+ /* If "icase" or "iwhite" was added or removed, need to update the diff. */
+! if (diff_flags != diff_flags_new)
+ FOR_ALL_TABPAGES(tp)
+ tp->tp_diff_invalid = TRUE;
+
+ diff_flags = diff_flags_new;
+ diff_context = diff_context_new;
+ diff_foldcolumn = diff_foldcolumn_new;
+
+ diff_redraw(TRUE);
+
+--- 2214,2227 ----
+ return FAIL;
+
+ /* If "icase" or "iwhite" was added or removed, need to update the diff. */
+! if (diff_flags != diff_flags_new || diff_algorithm != diff_algorithm_new)
+ FOR_ALL_TABPAGES(tp)
+ tp->tp_diff_invalid = TRUE;
+
+ diff_flags = diff_flags_new;
+ diff_context = diff_context_new;
+ diff_foldcolumn = diff_foldcolumn_new;
++ diff_algorithm = diff_algorithm_new;
+
+ diff_redraw(TRUE);
+
+***************
+*** 2690,2693 ****
+--- 2989,3144 ----
+ return n;
+ }
+
++ /*
++ * Handle an ED style diff line.
++ * Return FAIL if the line does not contain diff info.
++ */
++ static int
++ parse_diff_ed(
++ char_u *line,
++ linenr_T *lnum_orig,
++ long *count_orig,
++ linenr_T *lnum_new,
++ long *count_new)
++ {
++ char_u *p;
++ long f1, l1, f2, l2;
++ int difftype;
++
++ // The line must be one of three formats:
++ // change: {first}[,{last}]c{first}[,{last}]
++ // append: {first}a{first}[,{last}]
++ // delete: {first}[,{last}]d{first}
++ p = line;
++ f1 = getdigits(&p);
++ if (*p == ',')
++ {
++ ++p;
++ l1 = getdigits(&p);
++ }
++ else
++ l1 = f1;
++ if (*p != 'a' && *p != 'c' && *p != 'd')
++ return FAIL; // invalid diff format
++ difftype = *p++;
++ f2 = getdigits(&p);
++ if (*p == ',')
++ {
++ ++p;
++ l2 = getdigits(&p);
++ }
++ else
++ l2 = f2;
++ if (l1 < f1 || l2 < f2)
++ return FAIL;
++
++ if (difftype == 'a')
++ {
++ *lnum_orig = f1 + 1;
++ *count_orig = 0;
++ }
++ else
++ {
++ *lnum_orig = f1;
++ *count_orig = l1 - f1 + 1;
++ }
++ if (difftype == 'd')
++ {
++ *lnum_new = f2 + 1;
++ *count_new = 0;
++ }
++ else
++ {
++ *lnum_new = f2;
++ *count_new = l2 - f2 + 1;
++ }
++ return OK;
++ }
++
++ /*
++ * Parses unified diff with zero(!) context lines.
++ * Return FAIL if there is no diff information in "line".
++ */
++ static int
++ parse_diff_unified(
++ char_u *line,
++ linenr_T *lnum_orig,
++ long *count_orig,
++ linenr_T *lnum_new,
++ long *count_new)
++ {
++ char_u *p;
++ long oldline, oldcount, newline, newcount;
++
++ // Parse unified diff hunk header:
++ // @@ -oldline,oldcount +newline,newcount @@
++ p = line;
++ if (*p++ == '@' && *p++ == '@' && *p++ == ' ' && *p++ == '-')
++ {
++ oldline = getdigits(&p);
++ if (*p == ',')
++ {
++ ++p;
++ oldcount = getdigits(&p);
++ }
++ else
++ oldcount = 1;
++ if (*p++ == ' ' && *p++ == '+')
++ {
++ newline = getdigits(&p);
++ if (*p == ',')
++ {
++ ++p;
++ newcount = getdigits(&p);
++ }
++ else
++ newcount = 1;
++ }
++ else
++ return FAIL; // invalid diff format
++
++ if (oldcount == 0)
++ oldline += 1;
++ if (newcount == 0)
++ newline += 1;
++ if (newline == 0)
++ newline = 1;
++
++ *lnum_orig = oldline;
++ *count_orig = oldcount;
++ *lnum_new = newline;
++ *count_new = newcount;
++
++ return OK;
++ }
++
++ return FAIL;
++ }
++
++ /*
++ * Callback function for the xdl_diff() function.
++ * Stores the diff output in a grow array.
++ */
++ static int
++ xdiff_out(void *priv, mmbuffer_t *mb, int nbuf)
++ {
++ diffout_T *dout = (diffout_T *)priv;
++ int i;
++ char_u *p;
++
++ for (i = 0; i < nbuf; i++)
++ {
++ // We are only interested in the header lines, skip text lines.
++ if (STRNCMP(mb[i].ptr, "@@ ", 3) != 0)
++ continue;
++ if (ga_grow(&dout->dout_ga, 1) == FAIL)
++ return -1;
++ p = vim_strnsave((char_u *)mb[i].ptr, mb[i].size);
++ if (p == NULL)
++ return -1;
++ ((char_u **)dout->dout_ga.ga_data)[dout->dout_ga.ga_len++] = p;
++ }
++ return 0;
++ }
++
+ #endif /* FEAT_DIFF */
+*** ../vim-8.1.0359/src/structs.h 2018-09-06 16:27:20.664831945 +0200
+--- src/structs.h 2018-09-10 17:36:24.457997346 +0200
+***************
+*** 2433,2439 ****
+ term_T *b_term; /* When not NULL this buffer is for a terminal
+ * window. */
+ #endif
+!
+ }; /* file_buffer */
+
+
+--- 2433,2441 ----
+ term_T *b_term; /* When not NULL this buffer is for a terminal
+ * window. */
+ #endif
+! #ifdef FEAT_DIFF
+! int b_diff_failed; // internal diff failed for this buffer
+! #endif
+ }; /* file_buffer */
+
+
+*** ../vim-8.1.0359/src/testdir/dumps/Test_diff_01.dump 2018-09-10 17:44:36.056826154 +0200
+--- src/testdir/dumps/Test_diff_01.dump 2018-09-10 17:36:51.625695584 +0200
+***************
+*** 0 ****
+--- 1,20 ----
++ | +0#0000e05#a8a8a8255@1|-+0#4040ff13#afffff255@34||+1#0000000#ffffff0| +0#0000e05#a8a8a8255@1|0+0#0000000#5fd7ff255| @33
++ | +0#0000e05#a8a8a8255@1|1+0#0000000#ffffff0| @33||+1&&| +0#0000e05#a8a8a8255@1|1+0#0000000#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|2+0#0000000#ffffff0| @33||+1&&| +0#0000e05#a8a8a8255@1|2+0#0000000#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|3+0#0000000#ffffff0| @33||+1&&| +0#0000e05#a8a8a8255@1|3+0#0000000#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|4+0#0000000#ffffff0| @33||+1&&| +0#0000e05#a8a8a8255@1|4+0#0000000#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|5+0#0000000#ffffff0| @33||+1&&| +0#0000e05#a8a8a8255@1|5+0#0000000#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|6+0#0000000#ffffff0| @33||+1&&| +0#0000e05#a8a8a8255@1|6+0#0000000#ffffff0| @33
++ |++0#0000e05#a8a8a8255| |+|-@1| @1|4| |l|i|n|e|s|:| |7|-@19||+1#0000000#ffffff0|++0#0000e05#a8a8a8255| |+|-@1| @1|4| |l|i|n|e|s|:| |7|-@19
++ | @1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ |X+3#0000000&|f|i|l|e|1| @12|1|,|1| @11|A|l@1| |X+1&&|f|i|l|e|2| @12|1|,|1| @11|A|l@1
++ |:+0&&> @73
+*** ../vim-8.1.0359/src/testdir/dumps/Test_diff_02.dump 2018-09-10 17:44:36.060826113 +0200
+--- src/testdir/dumps/Test_diff_02.dump 2018-09-10 17:36:51.625695584 +0200
+***************
+*** 0 ****
+--- 1,20 ----
++ | +0#0000e05#a8a8a8255@1|0+0#0000000#5fd7ff255| @33||+1&#ffffff0| +0#0000e05#a8a8a8255@1|-+0#4040ff13#afffff255@34
++ | +0#0000e05#a8a8a8255@1|1+0#0000000#ffffff0| @33||+1&&| +0#0000e05#a8a8a8255@1|1+0#0000000#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|2+0#0000000#ffffff0| @33||+1&&| +0#0000e05#a8a8a8255@1|2+0#0000000#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|3+0#0000000#ffffff0| @33||+1&&| +0#0000e05#a8a8a8255@1|3+0#0000000#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|4+0#0000000#ffffff0| @33||+1&&| +0#0000e05#a8a8a8255@1|4+0#0000000#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|5+0#0000000#ffffff0| @33||+1&&| +0#0000e05#a8a8a8255@1|5+0#0000000#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|6+0#0000000#ffffff0| @33||+1&&| +0#0000e05#a8a8a8255@1|6+0#0000000#ffffff0| @33
++ |++0#0000e05#a8a8a8255| |+|-@1| @1|4| |l|i|n|e|s|:| |7|-@19||+1#0000000#ffffff0|++0#0000e05#a8a8a8255| |+|-@1| @1|4| |l|i|n|e|s|:| |7|-@19
++ | @1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ |X+3#0000000&|f|i|l|e|1| @12|1|,|1| @11|A|l@1| |X+1&&|f|i|l|e|2| @12|1|,|1| @11|A|l@1
++ |:+0&&> @73
+*** ../vim-8.1.0359/src/testdir/dumps/Test_diff_03.dump 2018-09-10 17:44:36.064826075 +0200
+--- src/testdir/dumps/Test_diff_03.dump 2018-09-10 17:36:51.625695584 +0200
+***************
+*** 0 ****
+--- 1,20 ----
++ |++0#0000e05#a8a8a8255| |+|-@1| @1|4| |l|i|n|e|s|:| |1|-@19||+1#0000000#ffffff0|++0#0000e05#a8a8a8255| |+|-@1| @1|4| |l|i|n|e|s|:| |1|-@19
++ | @1|5+0#0000000#ffffff0| @33||+1&&| +0#0000e05#a8a8a8255@1|5+0#0000000#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|6+0#0000000#ffffff0| @33||+1&&| +0#0000e05#a8a8a8255@1|6+0#0000000#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|7+0#0000000#ffffff0| @33||+1&&| +0#0000e05#a8a8a8255@1|7+0#0000000#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|8+0#0000000#ffffff0| @33||+1&&| +0#0000e05#a8a8a8255@1|8+0#0000000#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|9+0#0000000#ffffff0| @33||+1&&| +0#0000e05#a8a8a8255@1|9+0#0000000#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|1+0#0000000#ffffff0|0| @32||+1&&| +0#0000e05#a8a8a8255@1|1+0#0000000#ffffff0|0| @32
++ | +0#0000e05#a8a8a8255@1|-+0#4040ff13#afffff255@34||+1#0000000#ffffff0| +0#0000e05#a8a8a8255@1|1+0#0000000#5fd7ff255@1| @32
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ |X+3#0000000&|f|i|l|e|1| @12|1|,|1| @11|A|l@1| |X+1&&|f|i|l|e|2| @12|1|,|1| @11|A|l@1
++ |:+0&&> @73
+*** ../vim-8.1.0359/src/testdir/dumps/Test_diff_04.dump 2018-09-10 17:44:36.068826034 +0200
+--- src/testdir/dumps/Test_diff_04.dump 2018-09-10 17:36:51.625695584 +0200
+***************
+*** 0 ****
+--- 1,20 ----
++ |++0#0000e05#a8a8a8255| |+|-@1| @1|4| |l|i|n|e|s|:| |1|-@19||+1#0000000#ffffff0|++0#0000e05#a8a8a8255| |+|-@1| @1|4| |l|i|n|e|s|:| |1|-@19
++ | @1|5+0#0000000#ffffff0| @33||+1&&| +0#0000e05#a8a8a8255@1|5+0#0000000#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|6+0#0000000#ffffff0| @33||+1&&| +0#0000e05#a8a8a8255@1|6+0#0000000#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|7+0#0000000#ffffff0| @33||+1&&| +0#0000e05#a8a8a8255@1|7+0#0000000#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|8+0#0000000#ffffff0| @33||+1&&| +0#0000e05#a8a8a8255@1|8+0#0000000#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|9+0#0000000#ffffff0| @33||+1&&| +0#0000e05#a8a8a8255@1|9+0#0000000#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|1+0#0000000#ffffff0|0| @32||+1&&| +0#0000e05#a8a8a8255@1|1+0#0000000#ffffff0|0| @32
++ | +0#0000e05#a8a8a8255@1|1+0#0000000#5fd7ff255@1| @32||+1&#ffffff0| +0#0000e05#a8a8a8255@1|-+0#4040ff13#afffff255@34
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ |X+3#0000000&|f|i|l|e|1| @12|1|,|1| @11|A|l@1| |X+1&&|f|i|l|e|2| @12|1|,|1| @11|A|l@1
++ |:+0&&> @73
+*** ../vim-8.1.0359/src/testdir/dumps/Test_diff_05.dump 2018-09-10 17:44:36.072825994 +0200
+--- src/testdir/dumps/Test_diff_05.dump 2018-09-10 17:36:51.625695584 +0200
+***************
+*** 0 ****
+--- 1,20 ----
++ | +0#0000e05#a8a8a8255@1|1+0#0000000#ffffff0| @33||+1&&| +0#0000e05#a8a8a8255@1|1+0#0000000#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|2+0#0000000#ffffff0| @33||+1&&| +0#0000e05#a8a8a8255@1|2+0#0000000#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|3+0#0000000#ffffff0| @33||+1&&| +0#0000e05#a8a8a8255@1|3+0#0000000#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|4+0#0000000#ffffff0| @33||+1&&| +0#0000e05#a8a8a8255@1|4+0#0000000#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|-+0#4040ff13#afffff255@34||+1#0000000#ffffff0| +0#0000e05#a8a8a8255@1|4+0#0000000#5fd7ff255| @33
++ | +0#0000e05#a8a8a8255@1|5+0#0000000#ffffff0| @33||+1&&| +0#0000e05#a8a8a8255@1|5+0#0000000#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|6+0#0000000#ffffff0| @33||+1&&| +0#0000e05#a8a8a8255@1|6+0#0000000#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|7+0#0000000#ffffff0| @33||+1&&| +0#0000e05#a8a8a8255@1|7+0#0000000#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|8+0#0000000#ffffff0| @33||+1&&| +0#0000e05#a8a8a8255@1|8+0#0000000#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|9+0#0000000#ffffff0| @33||+1&&| +0#0000e05#a8a8a8255@1|9+0#0000000#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|1+0#0000000#ffffff0|0| @32||+1&&| +0#0000e05#a8a8a8255@1|1+0#0000000#ffffff0|0| @32
++ | +0#0000e05#a8a8a8255@1|1+0#0000000#5fd7ff255@1| @32||+1&#ffffff0| +0#0000e05#a8a8a8255@1|-+0#4040ff13#afffff255@34
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ |X+3#0000000&|f|i|l|e|1| @12|1|,|1| @11|A|l@1| |X+1&&|f|i|l|e|2| @12|1|,|1| @11|A|l@1
++ |:+0&&> @73
+*** ../vim-8.1.0359/src/testdir/dumps/Test_diff_06.dump 2018-09-10 17:44:36.072825994 +0200
+--- src/testdir/dumps/Test_diff_06.dump 2018-09-10 17:36:51.625695584 +0200
+***************
+*** 0 ****
+--- 1,20 ----
++ | +0#0000e05#a8a8a8255@1|1+0#0000000#ffffff0| @33||+1&&| +0#0000e05#a8a8a8255@1|1+0#0000000#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|2+0#0000000#ffffff0| @33||+1&&| +0#0000e05#a8a8a8255@1|2+0#0000000#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|3+0#0000000#ffffff0| @33||+1&&| +0#0000e05#a8a8a8255@1|3+0#0000000#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|4+0#0000000#ffffff0| @33||+1&&| +0#0000e05#a8a8a8255@1|4+0#0000000#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|4+0#0000000#5fd7ff255| @33||+1&#ffffff0| +0#0000e05#a8a8a8255@1|-+0#4040ff13#afffff255@34
++ | +0#0000e05#a8a8a8255@1|5+0#0000000#ffffff0| @33||+1&&| +0#0000e05#a8a8a8255@1|5+0#0000000#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|6+0#0000000#ffffff0| @33||+1&&| +0#0000e05#a8a8a8255@1|6+0#0000000#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|7+0#0000000#ffffff0| @33||+1&&| +0#0000e05#a8a8a8255@1|7+0#0000000#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|8+0#0000000#ffffff0| @33||+1&&| +0#0000e05#a8a8a8255@1|8+0#0000000#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|9+0#0000000#ffffff0| @33||+1&&| +0#0000e05#a8a8a8255@1|9+0#0000000#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|1+0#0000000#ffffff0|0| @32||+1&&| +0#0000e05#a8a8a8255@1|1+0#0000000#ffffff0|0| @32
++ | +0#0000e05#a8a8a8255@1|-+0#4040ff13#afffff255@34||+1#0000000#ffffff0| +0#0000e05#a8a8a8255@1|1+0#0000000#5fd7ff255@1| @32
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ |X+3#0000000&|f|i|l|e|1| @12|1|,|1| @11|A|l@1| |X+1&&|f|i|l|e|2| @12|1|,|1| @11|A|l@1
++ |:+0&&> @73
+*** ../vim-8.1.0359/src/testdir/dumps/Test_diff_07.dump 2018-09-10 17:44:36.076825953 +0200
+--- src/testdir/dumps/Test_diff_07.dump 2018-09-10 17:36:51.625695584 +0200
+***************
+*** 0 ****
+--- 1,20 ----
++ | +0#0000e05#a8a8a8255@1>#+0#0000000#ffffff0|i|n|c|l|u|d|e| |<|s|t|d|i|o|.|h|>| @16||+1&&| +0#0000e05#a8a8a8255@1|#+0#0000000#ffffff0|i|n|c|l|u|d|e| |<|s|t|d|i|o|.|h|>| @16
++ | +0#0000e05#a8a8a8255@1| +0#0000000#ffffff0@34||+1&&| +0#0000e05#a8a8a8255@1| +0#0000000#ffffff0@34
++ | +0#0000e05#a8a8a8255@1|/+2#0000000#ff404010@1| |F|r|o|b|s| |f|o@1| |h|e|a|r|t|i|l|y| +0&#ffd7ff255@13||+1&#ffffff0| +0#0000e05#a8a8a8255@1|i+2#0000000#ff404010|n|t| |f|i|b|(|i|n|t| |n|)| +0&#ffd7ff255@20
++ | +0#0000e05#a8a8a8255@1|i+0#0000000#5fd7ff255|n|t| |f|r|o|b|n|i|t|z|(|i|n|t| |f|o@1|)| @13||+1&#ffffff0| +0#0000e05#a8a8a8255@1|-+0#4040ff13#afffff255@34
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++ | +0#0000e05#a8a8a8255@1| +0#0000000#ffffff0@34||+1&&| +0#0000e05#a8a8a8255@1| +0#0000000#ffffff0@34
++ | +0#0000e05#a8a8a8255@1|i+2#0000000#ff404010|n|t| |f|a|c|t|(|i|n|t| |n|)| +0&#ffd7ff255@19||+1&#ffffff0| +0#0000e05#a8a8a8255@1|/+2#0000000#ff404010@1| |F|r|o|b|s| |f|o@1| |h|e|a|r|t|i|l|y| +0&#ffd7ff255@13
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++ | +0#0000e05#a8a8a8255@1|{+0#0000000#ffffff0| @33||+1&&| +0#0000e05#a8a8a8255@1|{+0#0000000#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1| +0#0000000#ffd7ff255@3|i|f+2&#ff404010|(|n| |>| |1|)| +0&#ffd7ff255@21||+1&#ffffff0| +0#0000e05#a8a8a8255@1| +0#0000000#ffd7ff255@3|i|n+2&#ff404010|t| |i|;| +0&#ffd7ff255@24
++ |X+3&#ffffff0|f|i|l|e|1| @12|1|,|1| @11|T|o|p| |X+1&&|f|i|l|e|2| @12|1|,|1| @11|T|o|p
++ |:+0&&|s|e|t| |d|i|f@1|o|p|t|+|=|i|n|t|e|r|n|a|l| @52
+*** ../vim-8.1.0359/src/testdir/dumps/Test_diff_08.dump 2018-09-10 17:44:36.080825913 +0200
+--- src/testdir/dumps/Test_diff_08.dump 2018-09-10 17:36:51.625695584 +0200
+***************
+*** 0 ****
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++ | +0#0000e05#a8a8a8255@1| +0#0000000#ffffff0@34||+1&&| +0#0000e05#a8a8a8255@1| +0#0000000#ffffff0@34
++ | +0#0000e05#a8a8a8255@1|-+0#4040ff13#afffff255@34||+1#0000000#ffffff0| +0#0000e05#a8a8a8255@1|i+0#0000000#5fd7ff255|n|t| |f|i|b|(|i|n|t| |n|)| @20
++ | +0#0000e05#a8a8a8255@1|-+0#4040ff13#afffff255@34||+1#0000000#ffffff0| +0#0000e05#a8a8a8255@1|{+0#0000000#5fd7ff255| @33
++ | +0#0000e05#a8a8a8255@1|-+0#4040ff13#afffff255@34||+1#0000000#ffffff0| +0#0000e05#a8a8a8255@1| +0#0000000#5fd7ff255@3|i|f|(|n| |>| |2|)| @21
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++ | +0#0000e05#a8a8a8255@1|-+0#4040ff13#afffff255@34||+1#0000000#ffffff0| +0#0000e05#a8a8a8255@1| +0#0000000#5fd7ff255@7|r|e|t|u|r|n| |f|i|b|(|n|-|1|)| |+| |f|i|b|(|n|-|2|)|;
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++ | +0#0000e05#a8a8a8255@1|-+0#4040ff13#afffff255@34||+1#0000000#ffffff0| +0#0000e05#a8a8a8255@1| +0#0000000#5fd7ff255@34
++ | +0#0000e05#a8a8a8255@1|/+0#0000000#ffffff0@1| |F|r|o|b|s| |f|o@1| |h|e|a|r|t|i|l|y| @13||+1&&| +0#0000e05#a8a8a8255@1|/+0#0000000#ffffff0@1| |F|r|o|b|s| |f|o@1| |h|e|a|r|t|i|l|y| @13
++ | +0#0000e05#a8a8a8255@1|i+0#0000000#ffffff0|n|t| |f|r|o|b|n|i|t|z|(|i|n|t| |f|o@1|)| @13||+1&&| +0#0000e05#a8a8a8255@1|i+0#0000000#ffffff0|n|t| |f|r|o|b|n|i|t|z|(|i|n|t| |f|o@1|)| @13
++ | +0#0000e05#a8a8a8255@1|{+0#0000000#ffffff0| @33||+1&&| +0#0000e05#a8a8a8255@1|{+0#0000000#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1| +0#0000000#ffffff0@3|i|n|t| |i|;| @24||+1&&| +0#0000e05#a8a8a8255@1| +0#0000000#ffffff0@3|i|n|t| |i|;| @24
++ | +0#0000e05#a8a8a8255@1| +0#0000000#ffffff0@3|f|o|r|(|i| |=| |0|;| |i| |<| |1|0|;| |i|+@1|)| @7||+1&&| +0#0000e05#a8a8a8255@1| +0#0000000#ffffff0@3|f|o|r|(|i| |=| |0|;| |i| |<| |1|0|;| |i|+@1|)| @7
++ | +0#0000e05#a8a8a8255@1| +0#0000000#ffffff0@3|{| @29||+1&&| +0#0000e05#a8a8a8255@1| +0#0000000#ffffff0@3|{| @29
++ | +0#0000e05#a8a8a8255@1| +0#0000000#5fd7ff255@7|p|r|i|n|t|f|(|"|Y|o|u|r| |a|n|s|w|e|r| |i|s|:| |"|)|;||+1&#ffffff0| +0#0000e05#a8a8a8255@1|-+0#4040ff13#afffff255@34
++ |X+3#0000000#ffffff0|f|i|l|e|1| @12|1|,|1| @11|T|o|p| |X+1&&|f|i|l|e|2| @12|1|,|1| @11|T|o|p
++ |:+0&&|s|e|t| |d|i|f@1|o|p|t|+|=|a|l|g|o|r|i|t|h|m|:|p|a|t|i|e|n|c|e| @42
+*** ../vim-8.1.0359/src/testdir/dumps/Test_diff_09.dump 2018-09-10 17:44:36.084825872 +0200
+--- src/testdir/dumps/Test_diff_09.dump 2018-09-10 17:36:51.625695584 +0200
+***************
+*** 0 ****
+--- 1,20 ----
++ | +0#0000e05#a8a8a8255@1>#+0#0000000#ffffff0|i|n|c|l|u|d|e| |<|s|t|d|i|o|.|h|>| @16||+1&&| +0#0000e05#a8a8a8255@1|#+0#0000000#ffffff0|i|n|c|l|u|d|e| |<|s|t|d|i|o|.|h|>| @16
++ | +0#0000e05#a8a8a8255@1| +0#0000000#ffffff0@34||+1&&| +0#0000e05#a8a8a8255@1| +0#0000000#ffffff0@34
++ | +0#0000e05#a8a8a8255@1|-+0#4040ff13#afffff255@34||+1#0000000#ffffff0| +0#0000e05#a8a8a8255@1|i+0#0000000#5fd7ff255|n|t| |f|i|b|(|i|n|t| |n|)| @20
++ | +0#0000e05#a8a8a8255@1|-+0#4040ff13#afffff255@34||+1#0000000#ffffff0| +0#0000e05#a8a8a8255@1|{+0#0000000#5fd7ff255| @33
++ | +0#0000e05#a8a8a8255@1|-+0#4040ff13#afffff255@34||+1#0000000#ffffff0| +0#0000e05#a8a8a8255@1| +0#0000000#5fd7ff255@3|i|f|(|n| |>| |2|)| @21
++ | +0#0000e05#a8a8a8255@1|-+0#4040ff13#afffff255@34||+1#0000000#ffffff0| +0#0000e05#a8a8a8255@1| +0#0000000#5fd7ff255@3|{| @29
++ | +0#0000e05#a8a8a8255@1|-+0#4040ff13#afffff255@34||+1#0000000#ffffff0| +0#0000e05#a8a8a8255@1| +0#0000000#5fd7ff255@7|r|e|t|u|r|n| |f|i|b|(|n|-|1|)| |+| |f|i|b|(|n|-|2|)|;
++ | +0#0000e05#a8a8a8255@1|-+0#4040ff13#afffff255@34||+1#0000000#ffffff0| +0#0000e05#a8a8a8255@1| +0#0000000#5fd7ff255@3|}| @29
++ | +0#0000e05#a8a8a8255@1|-+0#4040ff13#afffff255@34||+1#0000000#ffffff0| +0#0000e05#a8a8a8255@1| +0#0000000#5fd7ff255@3|r|e|t|u|r|n| |1|;| @21
++ | +0#0000e05#a8a8a8255@1|-+0#4040ff13#afffff255@34||+1#0000000#ffffff0| +0#0000e05#a8a8a8255@1|}+0#0000000#5fd7ff255| @33
++ | +0#0000e05#a8a8a8255@1|-+0#4040ff13#afffff255@34||+1#0000000#ffffff0| +0#0000e05#a8a8a8255@1| +0#0000000#5fd7ff255@34
++ | +0#0000e05#a8a8a8255@1|/+0#0000000#ffffff0@1| |F|r|o|b|s| |f|o@1| |h|e|a|r|t|i|l|y| @13||+1&&| +0#0000e05#a8a8a8255@1|/+0#0000000#ffffff0@1| |F|r|o|b|s| |f|o@1| |h|e|a|r|t|i|l|y| @13
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++ | +0#0000e05#a8a8a8255@1|{+0#0000000#ffffff0| @33||+1&&| +0#0000e05#a8a8a8255@1|{+0#0000000#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1| +0#0000000#ffffff0@3|i|n|t| |i|;| @24||+1&&| +0#0000e05#a8a8a8255@1| +0#0000000#ffffff0@3|i|n|t| |i|;| @24
++ | +0#0000e05#a8a8a8255@1| +0#0000000#ffffff0@3|f|o|r|(|i| |=| |0|;| |i| |<| |1|0|;| |i|+@1|)| @7||+1&&| +0#0000e05#a8a8a8255@1| +0#0000000#ffffff0@3|f|o|r|(|i| |=| |0|;| |i| |<| |1|0|;| |i|+@1|)| @7
++ | +0#0000e05#a8a8a8255@1| +0#0000000#ffffff0@3|{| @29||+1&&| +0#0000e05#a8a8a8255@1| +0#0000000#ffffff0@3|{| @29
++ | +0#0000e05#a8a8a8255@1| +0#0000000#5fd7ff255@7|p|r|i|n|t|f|(|"|Y|o|u|r| |a|n|s|w|e|r| |i|s|:| |"|)|;||+1&#ffffff0| +0#0000e05#a8a8a8255@1|-+0#4040ff13#afffff255@34
++ |X+3#0000000#ffffff0|f|i|l|e|1| @12|1|,|1| @11|T|o|p| |X+1&&|f|i|l|e|2| @12|1|,|1| @11|T|o|p
++ |:+0&&|s|e|t| |d|i|f@1|o|p|t|+|=|a|l|g|o|r|i|t|h|m|:|p|a|t|i|e|n|c|e| @42
+*** ../vim-8.1.0359/src/testdir/dumps/Test_diff_10.dump 2018-09-10 17:44:36.088825834 +0200
+--- src/testdir/dumps/Test_diff_10.dump 2018-09-10 17:36:51.625695584 +0200
+***************
+*** 0 ****
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++ | +0#0000e05#a8a8a8255@1> +0#0000000#ffffff0@34||+1&&| +0#0000e05#a8a8a8255@1| +0#0000000#ffffff0@34
++ | +0#0000e05#a8a8a8255@1| +0#0000000#ffffff0@1|d|e|f| |f|i|n|a|l|i|z|e|(|v|a|l|u|e|s|)| @12||+1&&| +0#0000e05#a8a8a8255@1| +0#0000000#ffffff0@1|d|e|f| |f|i|n|a|l|i|z|e|(|v|a|l|u|e|s|)| @12
++ | +0#0000e05#a8a8a8255@1| +0#0000000#ffffff0@34||+1&&| +0#0000e05#a8a8a8255@1| +0#0000000#ffffff0@34
++ | +0#0000e05#a8a8a8255@1| +0#0000000#ffffff0@3|v|a|l|u|e|s|.|e|a|c|h| |d|o| |||v||| @12||+1&&| +0#0000e05#a8a8a8255@1| +0#0000000#ffffff0@3|v|a|l|u|e|s|.|e|a|c|h| |d|o| |||v||| @12
++ | +0#0000e05#a8a8a8255@1|-+0#4040ff13#afffff255@34||+1#0000000#ffffff0| +0#0000e05#a8a8a8255@1| +0#0000000#5fd7ff255@5|v|.|p|r|e|p|a|r|e| @19
++ | +0#0000e05#a8a8a8255@1|-+0#4040ff13#afffff255@34||+1#0000000#ffffff0| +0#0000e05#a8a8a8255@1| +0#0000000#5fd7ff255@3|e|n|d| @27
++ | +0#0000e05#a8a8a8255@1|-+0#4040ff13#afffff255@34||+1#0000000#ffffff0| +0#0000e05#a8a8a8255@1| +0#0000000#5fd7ff255@34
++ | +0#0000e05#a8a8a8255@1|-+0#4040ff13#afffff255@34||+1#0000000#ffffff0| +0#0000e05#a8a8a8255@1| +0#0000000#5fd7ff255@3|v|a|l|u|e|s|.|e|a|c|h| |d|o| |||v||| @12
++ | +0#0000e05#a8a8a8255@1| +0#0000000#ffffff0@5|v|.|f|i|n|a|l|i|z|e| @18||+1&&| +0#0000e05#a8a8a8255@1| +0#0000000#ffffff0@5|v|.|f|i|n|a|l|i|z|e| @18
++ | +0#0000e05#a8a8a8255@1| +0#0000000#ffffff0@3|e|n|d| @27||+1&&| +0#0000e05#a8a8a8255@1| +0#0000000#ffffff0@3|e|n|d| @27
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ |X+3#0000000&|f|i|l|e|1| @12|1|,|0|-|1| @9|A|l@1| |X+1&&|f|i|l|e|2| @12|1|,|0|-|1| @9|A|l@1
++ |:+0&&|s|e|t| |d|i|f@1|o|p|t|+|=|i|n|t|e|r|n|a|l| @52
+*** ../vim-8.1.0359/src/testdir/dumps/Test_diff_11.dump 2018-09-10 17:44:36.092825793 +0200
+--- src/testdir/dumps/Test_diff_11.dump 2018-09-10 17:36:51.625695584 +0200
+***************
+*** 0 ****
+--- 1,20 ----
++ | +0#0000e05#a8a8a8255@1> +0#0000000#ffffff0@34||+1&&| +0#0000e05#a8a8a8255@1| +0#0000000#ffffff0@34
++ | +0#0000e05#a8a8a8255@1| +0#0000000#ffffff0@1|d|e|f| |f|i|n|a|l|i|z|e|(|v|a|l|u|e|s|)| @12||+1&&| +0#0000e05#a8a8a8255@1| +0#0000000#ffffff0@1|d|e|f| |f|i|n|a|l|i|z|e|(|v|a|l|u|e|s|)| @12
++ | +0#0000e05#a8a8a8255@1| +0#0000000#ffffff0@34||+1&&| +0#0000e05#a8a8a8255@1| +0#0000000#ffffff0@34
++ | +0#0000e05#a8a8a8255@1|-+0#4040ff13#afffff255@34||+1#0000000#ffffff0| +0#0000e05#a8a8a8255@1| +0#0000000#5fd7ff255@3|v|a|l|u|e|s|.|e|a|c|h| |d|o| |||v||| @12
++ | +0#0000e05#a8a8a8255@1|-+0#4040ff13#afffff255@34||+1#0000000#ffffff0| +0#0000e05#a8a8a8255@1| +0#0000000#5fd7ff255@5|v|.|p|r|e|p|a|r|e| @19
++ | +0#0000e05#a8a8a8255@1|-+0#4040ff13#afffff255@34||+1#0000000#ffffff0| +0#0000e05#a8a8a8255@1| +0#0000000#5fd7ff255@3|e|n|d| @27
++ | +0#0000e05#a8a8a8255@1|-+0#4040ff13#afffff255@34||+1#0000000#ffffff0| +0#0000e05#a8a8a8255@1| +0#0000000#5fd7ff255@34
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+*** ../vim-8.1.0359/src/testdir/dumps/Test_diff_12.dump 2018-09-10 17:44:36.096825753 +0200
+--- src/testdir/dumps/Test_diff_12.dump 2018-09-10 17:36:51.625695584 +0200
+***************
+*** 0 ****
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++ |X+3#0000000&|f|i|l|e|1| @12|1|,|1| @11|A|l@1| |X+1&&|f|i|l|e|2| @12|1|,|1| @11|A|l@1
++ |:+0&&> @73
+*** ../vim-8.1.0359/src/testdir/dumps/Test_diff_13.dump 2018-09-10 17:44:36.096825753 +0200
+--- src/testdir/dumps/Test_diff_13.dump 2018-09-10 17:36:51.625695584 +0200
+***************
+*** 0 ****
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++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ |X+3#0000000&|f|i|l|e|1| @12|0|,|0|-|1| @9|A|l@1| |X+1&&|f|i|l|e|2| @12|0|,|0|-|1| @9|A|l@1
++ |:+0&&> @73
+*** ../vim-8.1.0359/src/testdir/dumps/Test_diff_14.dump 2018-09-10 17:44:36.100825712 +0200
+--- src/testdir/dumps/Test_diff_14.dump 2018-09-10 17:36:51.625695584 +0200
+***************
+*** 0 ****
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++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
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++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
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++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ |X+3#0000000&|f|i|l|e|1| @12|1|,|1| @11|A|l@1| |X+1&&|f|i|l|e|2| @12|1|,|1| @11|A|l@1
++ |:+0&&> @73
+*** ../vim-8.1.0359/src/testdir/dumps/Test_diff_15.dump 2018-09-10 17:44:36.104825672 +0200
+--- src/testdir/dumps/Test_diff_15.dump 2018-09-10 17:36:51.625695584 +0200
+***************
+*** 0 ****
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++ | +0#0000e05#a8a8a8255@1| +0#0000000#ffffff0@2|p|r|i|n|t|f|(|"|H|e|l@1|o|,| |W|o|r|l|d|!|"|)|;| @7||+1&&| +0#0000e05#a8a8a8255@1| +0#0000000#ffffff0@5|p|r|i|n|t|f|(|"|H|e|l@1|o|,| |W|o|r|l|d|!|"|)|;| @4
++ | +0#0000e05#a8a8a8255@1| +0#0000000#ffffff0@2|r|e|t|u|r|n| |0|;| @22||+1&&| +0#0000e05#a8a8a8255@1| +0#0000000#ffffff0@5|r|e|t|u|r|n| |0|;| @19
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++ | +0#0000e05#a8a8a8255@1|}+0#0000000#ffffff0| @33||+1&&| +0#0000e05#a8a8a8255@1|}+0#0000000#ffffff0| @33
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++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
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++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
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++ |X+3#0000000&|f|i|l|e|1| @12|1|,|1| @11|A|l@1| |X+1&&|f|i|l|e|2| @12|1|,|1| @11|A|l@1
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+*** ../vim-8.1.0359/src/testdir/dumps/Test_diff_16.dump 2018-09-10 17:44:36.108825631 +0200
+--- src/testdir/dumps/Test_diff_16.dump 2018-09-10 17:36:51.625695584 +0200
+***************
+*** 0 ****
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++ | +0#0000e05#a8a8a8255@1|-+0#4040ff13#afffff255@34||+1#0000000#ffffff0| +0#0000e05#a8a8a8255@1| +0#0000000#5fd7ff255@2|{| @30
++ | +0#0000e05#a8a8a8255@1| +0#0000000#ffffff0@2|p|r|i|n|t|f|(|"|H|e|l@1|o|,| |W|o|r|l|d|!|"|)|;| @7||+1&&| +0#0000e05#a8a8a8255@1| +0#0000000#ffffff0@5|p|r|i|n|t|f|(|"|H|e|l@1|o|,| |W|o|r|l|d|!|"|)|;| @4
++ | +0#0000e05#a8a8a8255@1| +0#0000000#ffffff0@2|r|e|t|u|r|n| |0|;| @22||+1&&| +0#0000e05#a8a8a8255@1| +0#0000000#ffffff0@5|r|e|t|u|r|n| |0|;| @19
++ | +0#0000e05#a8a8a8255@1|-+0#4040ff13#afffff255@34||+1#0000000#ffffff0| +0#0000e05#a8a8a8255@1| +0#0000000#5fd7ff255@2|}| @30
++ | +0#0000e05#a8a8a8255@1|}+0#0000000#ffffff0| @33||+1&&| +0#0000e05#a8a8a8255@1|}+0#0000000#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ | +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33||+1#0000000&| +0#0000e05#a8a8a8255@1|~+0#4040ff13#ffffff0| @33
++ |X+3#0000000&|f|i|l|e|1| @12|1|,|1| @11|A|l@1| |X+1&&|f|i|l|e|2| @12|1|,|1| @11|A|l@1
++ |:+0&&|s|e|t| |d|i|f@1|o|p|t|+|=|i|n|t|e|r|n|a|l| @52
+*** ../vim-8.1.0359/src/testdir/test_diffmode.vim 2017-12-01 20:25:59.000000000 +0100
+--- src/testdir/test_diffmode.vim 2018-09-10 17:38:33.584583735 +0200
+***************
+*** 1,4 ****
+--- 1,6 ----
+ " Tests for diff mode
++ source shared.vim
++ source screendump.vim
+
+ func Test_diff_fold_sync()
+ enew!
+***************
+*** 33,38 ****
+--- 35,52 ----
+ endfunc
+
+ func Test_vert_split()
++ set diffopt=filler
++ call Common_vert_split()
++ set diffopt&
++ endfunc
++
++ func Test_vert_split_internal()
++ set diffopt=internal,filler
++ call Common_vert_split()
++ set diffopt&
++ endfunc
++
++ func Common_vert_split()
+ " Disable the title to avoid xterm keeping the wrong one.
+ set notitle noicon
+ new
+***************
+*** 275,284 ****
+ bwipe!
+ endfunc
+
+! func Test_diffopt_icase()
+! set diffopt=icase,foldcolumn:0
+!
+! e one
+ call setline(1, ['One', 'Two', 'Three', 'Four', 'Fi#ve'])
+ redraw
+ let normattr = screenattr(1, 1)
+--- 295,302 ----
+ bwipe!
+ endfunc
+
+! func Common_icase_test()
+! edit one
+ call setline(1, ['One', 'Two', 'Three', 'Four', 'Fi#ve'])
+ redraw
+ let normattr = screenattr(1, 1)
+***************
+*** 300,331 ****
+
+ diffoff!
+ %bwipe!
+ set diffopt&
+ endfunc
+
+! func Test_diffopt_iwhite()
+! set diffopt=iwhite,foldcolumn:0
+
+! e one
+! " Difference in trailing spaces should be ignored,
+ " but not other space differences.
+! call setline(1, ["One \t", 'Two', 'Three', 'Four'])
+ redraw
+ let normattr = screenattr(1, 1)
+ diffthis
+
+ botright vert new two
+! call setline(1, ["One\t ", "Two\t ", 'Three', ' Four'])
+ diffthis
+
+ redraw
+ call assert_equal(normattr, screenattr(1, 1))
+ call assert_equal(normattr, screenattr(2, 1))
+ call assert_equal(normattr, screenattr(3, 1))
+! call assert_notequal(normattr, screenattr(4, 1))
+
+ diffoff!
+ %bwipe!
+ set diffopt&
+ endfunc
+
+--- 318,371 ----
+
+ diffoff!
+ %bwipe!
++ endfunc
++
++ func Test_diffopt_icase()
++ set diffopt=icase,foldcolumn:0
++ call Common_icase_test()
+ set diffopt&
+ endfunc
+
+! func Test_diffopt_icase_internal()
+! set diffopt=icase,foldcolumn:0,internal
+! call Common_icase_test()
+! set diffopt&
+! endfunc
+
+! func Common_iwhite_test()
+! edit one
+! " Difference in trailing spaces and amount of spaces should be ignored,
+ " but not other space differences.
+! call setline(1, ["One \t", 'Two', 'Three', 'one two', 'one two', 'Four'])
+ redraw
+ let normattr = screenattr(1, 1)
+ diffthis
+
+ botright vert new two
+! call setline(1, ["One\t ", "Two\t ", 'Three', 'one two', 'onetwo', ' Four'])
+ diffthis
+
+ redraw
+ call assert_equal(normattr, screenattr(1, 1))
+ call assert_equal(normattr, screenattr(2, 1))
+ call assert_equal(normattr, screenattr(3, 1))
+! call assert_equal(normattr, screenattr(4, 1))
+! call assert_notequal(normattr, screenattr(5, 1))
+! call assert_notequal(normattr, screenattr(6, 1))
+
+ diffoff!
+ %bwipe!
++ endfunc
++
++ func Test_diffopt_iwhite()
++ set diffopt=iwhite,foldcolumn:0
++ call Common_iwhite_test()
++ set diffopt&
++ endfunc
++
++ func Test_diffopt_iwhite_internal()
++ set diffopt=internal,iwhite,foldcolumn:0
++ call Common_iwhite_test()
+ set diffopt&
+ endfunc
+
+***************
+*** 339,346 ****
+--- 379,391 ----
+
+ set diffopt=context:2
+ call assert_equal('+-- 2 lines: 1', foldtextresult(1))
++ set diffopt=internal,context:2
++ call assert_equal('+-- 2 lines: 1', foldtextresult(1))
++
+ set diffopt=context:1
+ call assert_equal('+-- 3 lines: 1', foldtextresult(1))
++ set diffopt=internal,context:1
++ call assert_equal('+-- 3 lines: 1', foldtextresult(1))
+
+ diffoff!
+ %bwipe!
+***************
+*** 348,354 ****
+ endfunc
+
+ func Test_diffopt_horizontal()
+! set diffopt=horizontal
+ diffsplit
+
+ call assert_equal(&columns, winwidth(1))
+--- 393,399 ----
+ endfunc
+
+ func Test_diffopt_horizontal()
+! set diffopt=internal,horizontal
+ diffsplit
+
+ call assert_equal(&columns, winwidth(1))
+***************
+*** 362,368 ****
+ endfunc
+
+ func Test_diffopt_vertical()
+! set diffopt=vertical
+ diffsplit
+
+ call assert_equal(&lines - 2, winheight(1))
+--- 407,413 ----
+ endfunc
+
+ func Test_diffopt_vertical()
+! set diffopt=internal,vertical
+ diffsplit
+
+ call assert_equal(&lines - 2, winheight(1))
+***************
+*** 376,382 ****
+ endfunc
+
+ func Test_diffopt_hiddenoff()
+! set diffopt=filler,foldcolumn:0,hiddenoff
+ e! one
+ call setline(1, ['Two', 'Three'])
+ redraw
+--- 421,427 ----
+ endfunc
+
+ func Test_diffopt_hiddenoff()
+! set diffopt=internal,filler,foldcolumn:0,hiddenoff
+ e! one
+ call setline(1, ['Two', 'Three'])
+ redraw
+***************
+*** 399,405 ****
+ endfunc
+
+ func Test_diffoff_hidden()
+! set diffopt=filler,foldcolumn:0
+ e! one
+ call setline(1, ['Two', 'Three'])
+ redraw
+--- 444,450 ----
+ endfunc
+
+ func Test_diffoff_hidden()
+! set diffopt=internal,filler,foldcolumn:0
+ e! one
+ call setline(1, ['Two', 'Three'])
+ redraw
+***************
+*** 629,631 ****
+--- 674,791 ----
+ bwipe!
+ bwipe!
+ endfunc
++
++ func WriteDiffFiles(list1, list2)
++ call writefile(a:list1, 'Xfile1')
++ call writefile(a:list2, 'Xfile2')
++ endfunc
++
++ " Verify a screendump with both the external and external diff.
++ func VerifyBoth(buf, dumpfile, extra)
++ call term_sendkeys(a:buf, ":diffupdate!\<cr>")
++ " trailing : for leaving the cursor on the command line
++ for cmd in [":set diffopt=filler" . a:extra . "\<cr>:", ":set diffopt+=internal\<cr>:"]
++ call term_sendkeys(a:buf, cmd)
++ if VerifyScreenDump(a:buf, a:dumpfile, {}, cmd =~ 'internal' ? 'internal' : 'external')
++ break " don't let the next iteration overwrite the "failed" file.
++ endif
++ endfor
++ endfunc
++
++ func Test_diff_screen()
++ if !CanRunVimInTerminal() || !has('menu')
++ return
++ endif
++ " clean up already existing swap files, just in case
++ call delete('.Xfile1.swp')
++ call delete('.Xfile2.swp')
++
++ " Test 1: Add a line in beginning of file 2
++ call WriteDiffFiles([1, 2, 3, 4, 5, 6, 7, 8, 9, 10], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10])
++ let buf = RunVimInTerminal('-d Xfile1 Xfile2', {})
++ " Set autoread mode, ,so that Vim won't complain once we re-write the test
++ " files
++ call term_sendkeys(buf, ":set autoread\<cr>\<c-w>w:set autoread\<cr>\<c-w>w")
++
++ call VerifyBoth(buf, 'Test_diff_01', '')
++
++ " Test 2: Add a line in beginning of file 1
++ call WriteDiffFiles([0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10], [1, 2, 3, 4, 5, 6, 7, 8, 9, 10])
++ call VerifyBoth(buf, 'Test_diff_02', '')
++
++ " Test 3: Add a line at the end of file 2
++ call WriteDiffFiles([1, 2, 3, 4, 5, 6, 7, 8, 9, 10], [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11])
++ call VerifyBoth(buf, 'Test_diff_03', '')
++
++ " Test 4: Add a line at the end of file 1
++ call WriteDiffFiles([1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11], [1, 2, 3, 4, 5, 6, 7, 8, 9, 10])
++ call VerifyBoth(buf, 'Test_diff_04', '')
++
++ " Test 5: Add a line in the middle of file 2, remove on at the end of file 1
++ call WriteDiffFiles([1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11], [1, 2, 3, 4, 4, 5, 6, 7, 8, 9, 10])
++ call VerifyBoth(buf, 'Test_diff_05', '')
++
++ " Test 6: Add a line in the middle of file 1, remove on at the end of file 2
++ call WriteDiffFiles([1, 2, 3, 4, 4, 5, 6, 7, 8, 9, 10], [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11])
++ call VerifyBoth(buf, 'Test_diff_06', '')
++
++ " Test 7 - 9: Test normal/patience/histogram diff algorithm
++ call WriteDiffFiles(['#include <stdio.h>', '', '// Frobs foo heartily', 'int frobnitz(int foo)', '{',
++ \ ' int i;', ' for(i = 0; i < 10; i++)', ' {', ' printf("Your answer is: ");',
++ \ ' printf("%d\n", foo);', ' }', '}', '', 'int fact(int n)', '{', ' if(n > 1)', ' {',
++ \ ' return fact(n-1) * n;', ' }', ' return 1;', '}', '', 'int main(int argc, char **argv)',
++ \ '{', ' frobnitz(fact(10));', '}'],
++ \ ['#include <stdio.h>', '', 'int fib(int n)', '{', ' if(n > 2)', ' {',
++ \ ' return fib(n-1) + fib(n-2);', ' }', ' return 1;', '}', '', '// Frobs foo heartily',
++ \ 'int frobnitz(int foo)', '{', ' int i;', ' for(i = 0; i < 10; i++)', ' {',
++ \ ' printf("%d\n", foo);', ' }', '}', '',
++ \ 'int main(int argc, char **argv)', '{', ' frobnitz(fib(10));', '}'])
++ call term_sendkeys(buf, ":diffupdate!\<cr>")
++ call term_sendkeys(buf, ":set diffopt+=internal\<cr>")
++ call VerifyScreenDump(buf, 'Test_diff_07', {})
++
++ call term_sendkeys(buf, ":set diffopt+=algorithm:patience\<cr>")
++ call VerifyScreenDump(buf, 'Test_diff_08', {})
++
++ call term_sendkeys(buf, ":set diffopt+=algorithm:histogram\<cr>")
++ call VerifyScreenDump(buf, 'Test_diff_09', {})
++
++ " Test 10-11: normal/indent-heuristic
++ call term_sendkeys(buf, ":set diffopt&vim\<cr>")
++ call WriteDiffFiles(['', ' def finalize(values)', '', ' values.each do |v|', ' v.finalize', ' end'],
++ \ ['', ' def finalize(values)', '', ' values.each do |v|', ' v.prepare', ' end', '',
++ \ ' values.each do |v|', ' v.finalize', ' end'])
++ call term_sendkeys(buf, ":diffupdate!\<cr>")
++ call term_sendkeys(buf, ":set diffopt+=internal\<cr>")
++ call VerifyScreenDump(buf, 'Test_diff_10', {})
++
++ call term_sendkeys(buf, ":set diffopt+=indent-heuristic\<cr>")
++ call VerifyScreenDump(buf, 'Test_diff_11', {})
++
++ " Test 12: diff the same file
++ call WriteDiffFiles([1, 2, 3, 4, 5, 6, 7, 8, 9, 10], [1, 2, 3, 4, 5, 6, 7, 8, 9, 10])
++ call VerifyBoth(buf, 'Test_diff_12', '')
++
++ " Test 13: diff an empty file
++ call WriteDiffFiles([], [])
++ call VerifyBoth(buf, 'Test_diff_13', '')
++
++ " Test 14: test diffopt+=icase
++ call WriteDiffFiles(['a', 'b', 'cd'], ['A', 'b', 'cDe'])
++ call VerifyBoth(buf, 'Test_diff_14', " diffopt+=filler diffopt+=icase")
++
++ " Test 15-16: test diffopt+=iwhite
++ call WriteDiffFiles(['int main()', '{', ' printf("Hello, World!");', ' return 0;', '}'],
++ \ ['int main()', '{', ' if (0)', ' {', ' printf("Hello, World!");', ' return 0;', ' }', '}'])
++ call term_sendkeys(buf, ":diffupdate!\<cr>")
++ call term_sendkeys(buf, ":set diffopt&vim diffopt+=filler diffopt+=iwhite\<cr>")
++ call VerifyScreenDump(buf, 'Test_diff_15', {})
++ call term_sendkeys(buf, ":set diffopt+=internal\<cr>")
++ call VerifyScreenDump(buf, 'Test_diff_16', {})
++
++ " clean up
++ call StopVimInTerminal(buf)
++ call delete('Xfile1')
++ call delete('Xfile2')
++ endfunc
++
+*** ../vim-8.1.0359/src/xdiff/COPYING 1970-01-01 01:00:00.000000000 +0100
+--- src/xdiff/COPYING 2018-09-10 17:39:20.324083781 +0200
+***************
+*** 0 ****
+--- 1,504 ----
++ GNU LESSER GENERAL PUBLIC LICENSE
++ Version 2.1, February 1999
++
++ Copyright (C) 1991, 1999 Free Software Foundation, Inc.
++ 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
++ Everyone is permitted to copy and distribute verbatim copies
++ of this license document, but changing it is not allowed.
++
++ [This is the first released version of the Lesser GPL. It also counts
++ as the successor of the GNU Library Public License, version 2, hence
++ the version number 2.1.]
++
++ Preamble
++
++ The licenses for most software are designed to take away your
++ freedom to share and change it. By contrast, the GNU General Public
++ Licenses are intended to guarantee your freedom to share and change
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++
++ This license, the Lesser General Public License, applies to some
++ specially designated software packages--typically libraries--of the
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++ can use it too, but we suggest you first think carefully about whether
++ this license or the ordinary General Public License is the better
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++
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++ but WITHOUT ANY WARRANTY; without even the implied warranty of
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++ Lesser General Public License for more details.
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++
+*** ../vim-8.1.0359/src/xdiff/xdiff.h 1970-01-01 01:00:00.000000000 +0100
+--- src/xdiff/xdiff.h 2018-09-10 17:39:20.324083781 +0200
+***************
+*** 0 ****
+--- 1,142 ----
++ /*
++ * LibXDiff by Davide Libenzi ( File Differential Library )
++ * Copyright (C) 2003 Davide Libenzi
++ *
++ * This library is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU Lesser General Public
++ * License as published by the Free Software Foundation; either
++ * version 2.1 of the License, or (at your option) any later version.
++ *
++ * This library is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
++ * Lesser General Public License for more details.
++ *
++ * You should have received a copy of the GNU Lesser General Public
++ * License along with this library; if not, see
++ * <http://www.gnu.org/licenses/>.
++ *
++ * Davide Libenzi <davidel@xmailserver.org>
++ *
++ */
++
++ #if !defined(XDIFF_H)
++ #define XDIFF_H
++
++ #ifdef __cplusplus
++ extern "C" {
++ #endif /* #ifdef __cplusplus */
++
++ /* xpparm_t.flags */
++ #define XDF_NEED_MINIMAL (1 << 0)
++
++ #define XDF_IGNORE_WHITESPACE (1 << 1)
++ #define XDF_IGNORE_WHITESPACE_CHANGE (1 << 2)
++ #define XDF_IGNORE_WHITESPACE_AT_EOL (1 << 3)
++ #define XDF_IGNORE_CR_AT_EOL (1 << 4)
++ #define XDF_WHITESPACE_FLAGS (XDF_IGNORE_WHITESPACE | \
++ XDF_IGNORE_WHITESPACE_CHANGE | \
++ XDF_IGNORE_WHITESPACE_AT_EOL | \
++ XDF_IGNORE_CR_AT_EOL)
++
++ #define XDF_IGNORE_BLANK_LINES (1 << 7)
++
++ #define XDF_PATIENCE_DIFF (1 << 14)
++ #define XDF_HISTOGRAM_DIFF (1 << 15)
++ #define XDF_DIFF_ALGORITHM_MASK (XDF_PATIENCE_DIFF | XDF_HISTOGRAM_DIFF)
++ #define XDF_DIFF_ALG(x) ((x) & XDF_DIFF_ALGORITHM_MASK)
++
++ #define XDF_INDENT_HEURISTIC (1 << 23)
++
++ /* xdemitconf_t.flags */
++ #define XDL_EMIT_FUNCNAMES (1 << 0)
++ #define XDL_EMIT_FUNCCONTEXT (1 << 2)
++
++ /* merge simplification levels */
++ #define XDL_MERGE_MINIMAL 0
++ #define XDL_MERGE_EAGER 1
++ #define XDL_MERGE_ZEALOUS 2
++ #define XDL_MERGE_ZEALOUS_ALNUM 3
++
++ /* merge favor modes */
++ #define XDL_MERGE_FAVOR_OURS 1
++ #define XDL_MERGE_FAVOR_THEIRS 2
++ #define XDL_MERGE_FAVOR_UNION 3
++
++ /* merge output styles */
++ #define XDL_MERGE_DIFF3 1
++
++ typedef struct s_mmfile {
++ char *ptr;
++ long size;
++ } mmfile_t;
++
++ typedef struct s_mmbuffer {
++ char *ptr;
++ long size;
++ } mmbuffer_t;
++
++ typedef struct s_xpparam {
++ unsigned long flags;
++
++ /* See Documentation/diff-options.txt. */
++ char **anchors;
++ size_t anchors_nr;
++ } xpparam_t;
++
++ typedef struct s_xdemitcb {
++ void *priv;
++ int (*outf)(void *, mmbuffer_t *, int);
++ } xdemitcb_t;
++
++ typedef long (*find_func_t)(const char *line, long line_len, char *buffer, long buffer_size, void *priv);
++
++ typedef int (*xdl_emit_hunk_consume_func_t)(long start_a, long count_a,
++ long start_b, long count_b,
++ void *cb_data);
++
++ typedef struct s_xdemitconf {
++ long ctxlen;
++ long interhunkctxlen;
++ unsigned long flags;
++ find_func_t find_func;
++ void *find_func_priv;
++ xdl_emit_hunk_consume_func_t hunk_func;
++ } xdemitconf_t;
++
++ typedef struct s_bdiffparam {
++ long bsize;
++ } bdiffparam_t;
++
++
++ #define xdl_malloc(x) malloc(x)
++ #define xdl_free(ptr) free(ptr)
++ #define xdl_realloc(ptr,x) realloc(ptr,x)
++
++ void *xdl_mmfile_first(mmfile_t *mmf, long *size);
++ long xdl_mmfile_size(mmfile_t *mmf);
++
++ int xdl_diff(mmfile_t *mf1, mmfile_t *mf2, xpparam_t const *xpp,
++ xdemitconf_t const *xecfg, xdemitcb_t *ecb);
++
++ typedef struct s_xmparam {
++ xpparam_t xpp;
++ int marker_size;
++ int level;
++ int favor;
++ int style;
++ const char *ancestor; /* label for orig */
++ const char *file1; /* label for mf1 */
++ const char *file2; /* label for mf2 */
++ } xmparam_t;
++
++ #define DEFAULT_CONFLICT_MARKER_SIZE 7
++
++ int xdl_merge(mmfile_t *orig, mmfile_t *mf1, mmfile_t *mf2,
++ xmparam_t const *xmp, mmbuffer_t *result);
++
++ #ifdef __cplusplus
++ }
++ #endif /* #ifdef __cplusplus */
++
++ #endif /* #if !defined(XDIFF_H) */
+*** ../vim-8.1.0359/src/xdiff/xdiffi.c 1970-01-01 01:00:00.000000000 +0100
+--- src/xdiff/xdiffi.c 2018-09-10 17:39:20.324083781 +0200
+***************
+*** 0 ****
+--- 1,1043 ----
++ /*
++ * LibXDiff by Davide Libenzi ( File Differential Library )
++ * Copyright (C) 2003 Davide Libenzi
++ *
++ * This library is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU Lesser General Public
++ * License as published by the Free Software Foundation; either
++ * version 2.1 of the License, or (at your option) any later version.
++ *
++ * This library is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
++ * Lesser General Public License for more details.
++ *
++ * You should have received a copy of the GNU Lesser General Public
++ * License along with this library; if not, see
++ * <http://www.gnu.org/licenses/>.
++ *
++ * Davide Libenzi <davidel@xmailserver.org>
++ *
++ */
++
++ #include "xinclude.h"
++
++ #define XDL_MAX_COST_MIN 256
++ #define XDL_HEUR_MIN_COST 256
++ #define XDL_LINE_MAX (long)((1UL << (CHAR_BIT * sizeof(long) - 1)) - 1)
++ #define XDL_SNAKE_CNT 20
++ #define XDL_K_HEUR 4
++
++ typedef struct s_xdpsplit {
++ long i1, i2;
++ int min_lo, min_hi;
++ } xdpsplit_t;
++
++ /*
++ * See "An O(ND) Difference Algorithm and its Variations", by Eugene Myers.
++ * Basically considers a "box" (off1, off2, lim1, lim2) and scan from both
++ * the forward diagonal starting from (off1, off2) and the backward diagonal
++ * starting from (lim1, lim2). If the K values on the same diagonal crosses
++ * returns the furthest point of reach. We might end up having to expensive
++ * cases using this algorithm is full, so a little bit of heuristic is needed
++ * to cut the search and to return a suboptimal point.
++ */
++ static long xdl_split(unsigned long const *ha1, long off1, long lim1,
++ unsigned long const *ha2, long off2, long lim2,
++ long *kvdf, long *kvdb, int need_min, xdpsplit_t *spl,
++ xdalgoenv_t *xenv) {
++ long dmin = off1 - lim2, dmax = lim1 - off2;
++ long fmid = off1 - off2, bmid = lim1 - lim2;
++ long odd = (fmid - bmid) & 1;
++ long fmin = fmid, fmax = fmid;
++ long bmin = bmid, bmax = bmid;
++ long ec, d, i1, i2, prev1, best, dd, v, k;
++
++ /*
++ * Set initial diagonal values for both forward and backward path.
++ */
++ kvdf[fmid] = off1;
++ kvdb[bmid] = lim1;
++
++ for (ec = 1;; ec++) {
++ int got_snake = 0;
++
++ /*
++ * We need to extent the diagonal "domain" by one. If the next
++ * values exits the box boundaries we need to change it in the
++ * opposite direction because (max - min) must be a power of two.
++ * Also we initialize the external K value to -1 so that we can
++ * avoid extra conditions check inside the core loop.
++ */
++ if (fmin > dmin)
++ kvdf[--fmin - 1] = -1;
++ else
++ ++fmin;
++ if (fmax < dmax)
++ kvdf[++fmax + 1] = -1;
++ else
++ --fmax;
++
++ for (d = fmax; d >= fmin; d -= 2) {
++ if (kvdf[d - 1] >= kvdf[d + 1])
++ i1 = kvdf[d - 1] + 1;
++ else
++ i1 = kvdf[d + 1];
++ prev1 = i1;
++ i2 = i1 - d;
++ for (; i1 < lim1 && i2 < lim2 && ha1[i1] == ha2[i2]; i1++, i2++);
++ if (i1 - prev1 > xenv->snake_cnt)
++ got_snake = 1;
++ kvdf[d] = i1;
++ if (odd && bmin <= d && d <= bmax && kvdb[d] <= i1) {
++ spl->i1 = i1;
++ spl->i2 = i2;
++ spl->min_lo = spl->min_hi = 1;
++ return ec;
++ }
++ }
++
++ /*
++ * We need to extent the diagonal "domain" by one. If the next
++ * values exits the box boundaries we need to change it in the
++ * opposite direction because (max - min) must be a power of two.
++ * Also we initialize the external K value to -1 so that we can
++ * avoid extra conditions check inside the core loop.
++ */
++ if (bmin > dmin)
++ kvdb[--bmin - 1] = XDL_LINE_MAX;
++ else
++ ++bmin;
++ if (bmax < dmax)
++ kvdb[++bmax + 1] = XDL_LINE_MAX;
++ else
++ --bmax;
++
++ for (d = bmax; d >= bmin; d -= 2) {
++ if (kvdb[d - 1] < kvdb[d + 1])
++ i1 = kvdb[d - 1];
++ else
++ i1 = kvdb[d + 1] - 1;
++ prev1 = i1;
++ i2 = i1 - d;
++ for (; i1 > off1 && i2 > off2 && ha1[i1 - 1] == ha2[i2 - 1]; i1--, i2--);
++ if (prev1 - i1 > xenv->snake_cnt)
++ got_snake = 1;
++ kvdb[d] = i1;
++ if (!odd && fmin <= d && d <= fmax && i1 <= kvdf[d]) {
++ spl->i1 = i1;
++ spl->i2 = i2;
++ spl->min_lo = spl->min_hi = 1;
++ return ec;
++ }
++ }
++
++ if (need_min)
++ continue;
++
++ /*
++ * If the edit cost is above the heuristic trigger and if
++ * we got a good snake, we sample current diagonals to see
++ * if some of the, have reached an "interesting" path. Our
++ * measure is a function of the distance from the diagonal
++ * corner (i1 + i2) penalized with the distance from the
++ * mid diagonal itself. If this value is above the current
++ * edit cost times a magic factor (XDL_K_HEUR) we consider
++ * it interesting.
++ */
++ if (got_snake && ec > xenv->heur_min) {
++ for (best = 0, d = fmax; d >= fmin; d -= 2) {
++ dd = d > fmid ? d - fmid: fmid - d;
++ i1 = kvdf[d];
++ i2 = i1 - d;
++ v = (i1 - off1) + (i2 - off2) - dd;
++
++ if (v > XDL_K_HEUR * ec && v > best &&
++ off1 + xenv->snake_cnt <= i1 && i1 < lim1 &&
++ off2 + xenv->snake_cnt <= i2 && i2 < lim2) {
++ for (k = 1; ha1[i1 - k] == ha2[i2 - k]; k++)
++ if (k == xenv->snake_cnt) {
++ best = v;
++ spl->i1 = i1;
++ spl->i2 = i2;
++ break;
++ }
++ }
++ }
++ if (best > 0) {
++ spl->min_lo = 1;
++ spl->min_hi = 0;
++ return ec;
++ }
++
++ for (best = 0, d = bmax; d >= bmin; d -= 2) {
++ dd = d > bmid ? d - bmid: bmid - d;
++ i1 = kvdb[d];
++ i2 = i1 - d;
++ v = (lim1 - i1) + (lim2 - i2) - dd;
++
++ if (v > XDL_K_HEUR * ec && v > best &&
++ off1 < i1 && i1 <= lim1 - xenv->snake_cnt &&
++ off2 < i2 && i2 <= lim2 - xenv->snake_cnt) {
++ for (k = 0; ha1[i1 + k] == ha2[i2 + k]; k++)
++ if (k == xenv->snake_cnt - 1) {
++ best = v;
++ spl->i1 = i1;
++ spl->i2 = i2;
++ break;
++ }
++ }
++ }
++ if (best > 0) {
++ spl->min_lo = 0;
++ spl->min_hi = 1;
++ return ec;
++ }
++ }
++
++ /*
++ * Enough is enough. We spent too much time here and now we collect
++ * the furthest reaching path using the (i1 + i2) measure.
++ */
++ if (ec >= xenv->mxcost) {
++ long fbest, fbest1, bbest, bbest1;
++
++ fbest = fbest1 = -1;
++ for (d = fmax; d >= fmin; d -= 2) {
++ i1 = XDL_MIN(kvdf[d], lim1);
++ i2 = i1 - d;
++ if (lim2 < i2)
++ i1 = lim2 + d, i2 = lim2;
++ if (fbest < i1 + i2) {
++ fbest = i1 + i2;
++ fbest1 = i1;
++ }
++ }
++
++ bbest = bbest1 = XDL_LINE_MAX;
++ for (d = bmax; d >= bmin; d -= 2) {
++ i1 = XDL_MAX(off1, kvdb[d]);
++ i2 = i1 - d;
++ if (i2 < off2)
++ i1 = off2 + d, i2 = off2;
++ if (i1 + i2 < bbest) {
++ bbest = i1 + i2;
++ bbest1 = i1;
++ }
++ }
++
++ if ((lim1 + lim2) - bbest < fbest - (off1 + off2)) {
++ spl->i1 = fbest1;
++ spl->i2 = fbest - fbest1;
++ spl->min_lo = 1;
++ spl->min_hi = 0;
++ } else {
++ spl->i1 = bbest1;
++ spl->i2 = bbest - bbest1;
++ spl->min_lo = 0;
++ spl->min_hi = 1;
++ }
++ return ec;
++ }
++ }
++ }
++
++
++ /*
++ * Rule: "Divide et Impera". Recursively split the box in sub-boxes by calling
++ * the box splitting function. Note that the real job (marking changed lines)
++ * is done in the two boundary reaching checks.
++ */
++ int xdl_recs_cmp(diffdata_t *dd1, long off1, long lim1,
++ diffdata_t *dd2, long off2, long lim2,
++ long *kvdf, long *kvdb, int need_min, xdalgoenv_t *xenv) {
++ unsigned long const *ha1 = dd1->ha, *ha2 = dd2->ha;
++
++ /*
++ * Shrink the box by walking through each diagonal snake (SW and NE).
++ */
++ for (; off1 < lim1 && off2 < lim2 && ha1[off1] == ha2[off2]; off1++, off2++);
++ for (; off1 < lim1 && off2 < lim2 && ha1[lim1 - 1] == ha2[lim2 - 1]; lim1--, lim2--);
++
++ /*
++ * If one dimension is empty, then all records on the other one must
++ * be obviously changed.
++ */
++ if (off1 == lim1) {
++ char *rchg2 = dd2->rchg;
++ long *rindex2 = dd2->rindex;
++
++ for (; off2 < lim2; off2++)
++ rchg2[rindex2[off2]] = 1;
++ } else if (off2 == lim2) {
++ char *rchg1 = dd1->rchg;
++ long *rindex1 = dd1->rindex;
++
++ for (; off1 < lim1; off1++)
++ rchg1[rindex1[off1]] = 1;
++ } else {
++ xdpsplit_t spl;
++ spl.i1 = spl.i2 = 0;
++
++ /*
++ * Divide ...
++ */
++ if (xdl_split(ha1, off1, lim1, ha2, off2, lim2, kvdf, kvdb,
++ need_min, &spl, xenv) < 0) {
++
++ return -1;
++ }
++
++ /*
++ * ... et Impera.
++ */
++ if (xdl_recs_cmp(dd1, off1, spl.i1, dd2, off2, spl.i2,
++ kvdf, kvdb, spl.min_lo, xenv) < 0 ||
++ xdl_recs_cmp(dd1, spl.i1, lim1, dd2, spl.i2, lim2,
++ kvdf, kvdb, spl.min_hi, xenv) < 0) {
++
++ return -1;
++ }
++ }
++
++ return 0;
++ }
++
++
++ int xdl_do_diff(mmfile_t *mf1, mmfile_t *mf2, xpparam_t const *xpp,
++ xdfenv_t *xe) {
++ long ndiags;
++ long *kvd, *kvdf, *kvdb;
++ xdalgoenv_t xenv;
++ diffdata_t dd1, dd2;
++
++ if (XDF_DIFF_ALG(xpp->flags) == XDF_PATIENCE_DIFF)
++ return xdl_do_patience_diff(mf1, mf2, xpp, xe);
++
++ if (XDF_DIFF_ALG(xpp->flags) == XDF_HISTOGRAM_DIFF)
++ return xdl_do_histogram_diff(mf1, mf2, xpp, xe);
++
++ if (xdl_prepare_env(mf1, mf2, xpp, xe) < 0) {
++
++ return -1;
++ }
++
++ /*
++ * Allocate and setup K vectors to be used by the differential algorithm.
++ * One is to store the forward path and one to store the backward path.
++ */
++ ndiags = xe->xdf1.nreff + xe->xdf2.nreff + 3;
++ if (!(kvd = (long *) xdl_malloc((2 * ndiags + 2) * sizeof(long)))) {
++
++ xdl_free_env(xe);
++ return -1;
++ }
++ kvdf = kvd;
++ kvdb = kvdf + ndiags;
++ kvdf += xe->xdf2.nreff + 1;
++ kvdb += xe->xdf2.nreff + 1;
++
++ xenv.mxcost = xdl_bogosqrt(ndiags);
++ if (xenv.mxcost < XDL_MAX_COST_MIN)
++ xenv.mxcost = XDL_MAX_COST_MIN;
++ xenv.snake_cnt = XDL_SNAKE_CNT;
++ xenv.heur_min = XDL_HEUR_MIN_COST;
++
++ dd1.nrec = xe->xdf1.nreff;
++ dd1.ha = xe->xdf1.ha;
++ dd1.rchg = xe->xdf1.rchg;
++ dd1.rindex = xe->xdf1.rindex;
++ dd2.nrec = xe->xdf2.nreff;
++ dd2.ha = xe->xdf2.ha;
++ dd2.rchg = xe->xdf2.rchg;
++ dd2.rindex = xe->xdf2.rindex;
++
++ if (xdl_recs_cmp(&dd1, 0, dd1.nrec, &dd2, 0, dd2.nrec,
++ kvdf, kvdb, (xpp->flags & XDF_NEED_MINIMAL) != 0, &xenv) < 0) {
++
++ xdl_free(kvd);
++ xdl_free_env(xe);
++ return -1;
++ }
++
++ xdl_free(kvd);
++
++ return 0;
++ }
++
++
++ static xdchange_t *xdl_add_change(xdchange_t *xscr, long i1, long i2, long chg1, long chg2) {
++ xdchange_t *xch;
++
++ if (!(xch = (xdchange_t *) xdl_malloc(sizeof(xdchange_t))))
++ return NULL;
++
++ xch->next = xscr;
++ xch->i1 = i1;
++ xch->i2 = i2;
++ xch->chg1 = chg1;
++ xch->chg2 = chg2;
++ xch->ignore = 0;
++
++ return xch;
++ }
++
++
++ static int recs_match(xrecord_t *rec1, xrecord_t *rec2, long flags)
++ {
++ return (rec1->ha == rec2->ha &&
++ xdl_recmatch(rec1->ptr, rec1->size,
++ rec2->ptr, rec2->size,
++ flags));
++ }
++
++ /*
++ * If a line is indented more than this, get_indent() just returns this value.
++ * This avoids having to do absurd amounts of work for data that are not
++ * human-readable text, and also ensures that the output of get_indent fits within
++ * an int.
++ */
++ #define MAX_INDENT 200
++
++ /*
++ * Return the amount of indentation of the specified line, treating TAB as 8
++ * columns. Return -1 if line is empty or contains only whitespace. Clamp the
++ * output value at MAX_INDENT.
++ */
++ static int get_indent(xrecord_t *rec)
++ {
++ long i;
++ int ret = 0;
++
++ for (i = 0; i < rec->size; i++) {
++ char c = rec->ptr[i];
++
++ if (!XDL_ISSPACE(c))
++ return ret;
++ else if (c == ' ')
++ ret += 1;
++ else if (c == '\t')
++ ret += 8 - ret % 8;
++ /* ignore other whitespace characters */
++
++ if (ret >= MAX_INDENT)
++ return MAX_INDENT;
++ }
++
++ /* The line contains only whitespace. */
++ return -1;
++ }
++
++ /*
++ * If more than this number of consecutive blank rows are found, just return this
++ * value. This avoids requiring O(N^2) work for pathological cases, and also
++ * ensures that the output of score_split fits in an int.
++ */
++ #define MAX_BLANKS 20
++
++ /* Characteristics measured about a hypothetical split position. */
++ struct split_measurement {
++ /*
++ * Is the split at the end of the file (aside from any blank lines)?
++ */
++ int end_of_file;
++
++ /*
++ * How much is the line immediately following the split indented (or -1 if
++ * the line is blank):
++ */
++ int indent;
++
++ /*
++ * How many consecutive lines above the split are blank?
++ */
++ int pre_blank;
++
++ /*
++ * How much is the nearest non-blank line above the split indented (or -1
++ * if there is no such line)?
++ */
++ int pre_indent;
++
++ /*
++ * How many lines after the line following the split are blank?
++ */
++ int post_blank;
++
++ /*
++ * How much is the nearest non-blank line after the line following the
++ * split indented (or -1 if there is no such line)?
++ */
++ int post_indent;
++ };
++
++ struct split_score {
++ /* The effective indent of this split (smaller is preferred). */
++ int effective_indent;
++
++ /* Penalty for this split (smaller is preferred). */
++ int penalty;
++ };
++
++ /*
++ * Fill m with information about a hypothetical split of xdf above line split.
++ */
++ static void measure_split(const xdfile_t *xdf, long split,
++ struct split_measurement *m)
++ {
++ long i;
++
++ if (split >= xdf->nrec) {
++ m->end_of_file = 1;
++ m->indent = -1;
++ } else {
++ m->end_of_file = 0;
++ m->indent = get_indent(xdf->recs[split]);
++ }
++
++ m->pre_blank = 0;
++ m->pre_indent = -1;
++ for (i = split - 1; i >= 0; i--) {
++ m->pre_indent = get_indent(xdf->recs[i]);
++ if (m->pre_indent != -1)
++ break;
++ m->pre_blank += 1;
++ if (m->pre_blank == MAX_BLANKS) {
++ m->pre_indent = 0;
++ break;
++ }
++ }
++
++ m->post_blank = 0;
++ m->post_indent = -1;
++ for (i = split + 1; i < xdf->nrec; i++) {
++ m->post_indent = get_indent(xdf->recs[i]);
++ if (m->post_indent != -1)
++ break;
++ m->post_blank += 1;
++ if (m->post_blank == MAX_BLANKS) {
++ m->post_indent = 0;
++ break;
++ }
++ }
++ }
++
++ /*
++ * The empirically-determined weight factors used by score_split() below.
++ * Larger values means that the position is a less favorable place to split.
++ *
++ * Note that scores are only ever compared against each other, so multiplying
++ * all of these weight/penalty values by the same factor wouldn't change the
++ * heuristic's behavior. Still, we need to set that arbitrary scale *somehow*.
++ * In practice, these numbers are chosen to be large enough that they can be
++ * adjusted relative to each other with sufficient precision despite using
++ * integer math.
++ */
++
++ /* Penalty if there are no non-blank lines before the split */
++ #define START_OF_FILE_PENALTY 1
++
++ /* Penalty if there are no non-blank lines after the split */
++ #define END_OF_FILE_PENALTY 21
++
++ /* Multiplier for the number of blank lines around the split */
++ #define TOTAL_BLANK_WEIGHT (-30)
++
++ /* Multiplier for the number of blank lines after the split */
++ #define POST_BLANK_WEIGHT 6
++
++ /*
++ * Penalties applied if the line is indented more than its predecessor
++ */
++ #define RELATIVE_INDENT_PENALTY (-4)
++ #define RELATIVE_INDENT_WITH_BLANK_PENALTY 10
++
++ /*
++ * Penalties applied if the line is indented less than both its predecessor and
++ * its successor
++ */
++ #define RELATIVE_OUTDENT_PENALTY 24
++ #define RELATIVE_OUTDENT_WITH_BLANK_PENALTY 17
++
++ /*
++ * Penalties applied if the line is indented less than its predecessor but not
++ * less than its successor
++ */
++ #define RELATIVE_DEDENT_PENALTY 23
++ #define RELATIVE_DEDENT_WITH_BLANK_PENALTY 17
++
++ /*
++ * We only consider whether the sum of the effective indents for splits are
++ * less than (-1), equal to (0), or greater than (+1) each other. The resulting
++ * value is multiplied by the following weight and combined with the penalty to
++ * determine the better of two scores.
++ */
++ #define INDENT_WEIGHT 60
++
++ /*
++ * How far do we slide a hunk at most?
++ */
++ #define INDENT_HEURISTIC_MAX_SLIDING 100
++
++ /*
++ * Compute a badness score for the hypothetical split whose measurements are
++ * stored in m. The weight factors were determined empirically using the tools and
++ * corpus described in
++ *
++ * https://github.com/mhagger/diff-slider-tools
++ *
++ * Also see that project if you want to improve the weights based on, for example,
++ * a larger or more diverse corpus.
++ */
++ static void score_add_split(const struct split_measurement *m, struct split_score *s)
++ {
++ /*
++ * A place to accumulate penalty factors (positive makes this index more
++ * favored):
++ */
++ int post_blank, total_blank, indent, any_blanks;
++
++ if (m->pre_indent == -1 && m->pre_blank == 0)
++ s->penalty += START_OF_FILE_PENALTY;
++
++ if (m->end_of_file)
++ s->penalty += END_OF_FILE_PENALTY;
++
++ /*
++ * Set post_blank to the number of blank lines following the split,
++ * including the line immediately after the split:
++ */
++ post_blank = (m->indent == -1) ? 1 + m->post_blank : 0;
++ total_blank = m->pre_blank + post_blank;
++
++ /* Penalties based on nearby blank lines: */
++ s->penalty += TOTAL_BLANK_WEIGHT * total_blank;
++ s->penalty += POST_BLANK_WEIGHT * post_blank;
++
++ if (m->indent != -1)
++ indent = m->indent;
++ else
++ indent = m->post_indent;
++
++ any_blanks = (total_blank != 0);
++
++ /* Note that the effective indent is -1 at the end of the file: */
++ s->effective_indent += indent;
++
++ if (indent == -1) {
++ /* No additional adjustments needed. */
++ } else if (m->pre_indent == -1) {
++ /* No additional adjustments needed. */
++ } else if (indent > m->pre_indent) {
++ /*
++ * The line is indented more than its predecessor.
++ */
++ s->penalty += any_blanks ?
++ RELATIVE_INDENT_WITH_BLANK_PENALTY :
++ RELATIVE_INDENT_PENALTY;
++ } else if (indent == m->pre_indent) {
++ /*
++ * The line has the same indentation level as its predecessor.
++ * No additional adjustments needed.
++ */
++ } else {
++ /*
++ * The line is indented less than its predecessor. It could be
++ * the block terminator of the previous block, but it could
++ * also be the start of a new block (e.g., an "else" block, or
++ * maybe the previous block didn't have a block terminator).
++ * Try to distinguish those cases based on what comes next:
++ */
++ if (m->post_indent != -1 && m->post_indent > indent) {
++ /*
++ * The following line is indented more. So it is likely
++ * that this line is the start of a block.
++ */
++ s->penalty += any_blanks ?
++ RELATIVE_OUTDENT_WITH_BLANK_PENALTY :
++ RELATIVE_OUTDENT_PENALTY;
++ } else {
++ /*
++ * That was probably the end of a block.
++ */
++ s->penalty += any_blanks ?
++ RELATIVE_DEDENT_WITH_BLANK_PENALTY :
++ RELATIVE_DEDENT_PENALTY;
++ }
++ }
++ }
++
++ static int score_cmp(struct split_score *s1, struct split_score *s2)
++ {
++ /* -1 if s1.effective_indent < s2->effective_indent, etc. */
++ int cmp_indents = ((s1->effective_indent > s2->effective_indent) -
++ (s1->effective_indent < s2->effective_indent));
++
++ return INDENT_WEIGHT * cmp_indents + (s1->penalty - s2->penalty);
++ }
++
++ /*
++ * Represent a group of changed lines in an xdfile_t (i.e., a contiguous group
++ * of lines that was inserted or deleted from the corresponding version of the
++ * file). We consider there to be such a group at the beginning of the file, at
++ * the end of the file, and between any two unchanged lines, though most such
++ * groups will usually be empty.
++ *
++ * If the first line in a group is equal to the line following the group, then
++ * the group can be slid down. Similarly, if the last line in a group is equal
++ * to the line preceding the group, then the group can be slid up. See
++ * group_slide_down() and group_slide_up().
++ *
++ * Note that loops that are testing for changed lines in xdf->rchg do not need
++ * index bounding since the array is prepared with a zero at position -1 and N.
++ */
++ struct xdlgroup {
++ /*
++ * The index of the first changed line in the group, or the index of
++ * the unchanged line above which the (empty) group is located.
++ */
++ long start;
++
++ /*
++ * The index of the first unchanged line after the group. For an empty
++ * group, end is equal to start.
++ */
++ long end;
++ };
++
++ /*
++ * Initialize g to point at the first group in xdf.
++ */
++ static void group_init(xdfile_t *xdf, struct xdlgroup *g)
++ {
++ g->start = g->end = 0;
++ while (xdf->rchg[g->end])
++ g->end++;
++ }
++
++ /*
++ * Move g to describe the next (possibly empty) group in xdf and return 0. If g
++ * is already at the end of the file, do nothing and return -1.
++ */
++ static inline int group_next(xdfile_t *xdf, struct xdlgroup *g)
++ {
++ if (g->end == xdf->nrec)
++ return -1;
++
++ g->start = g->end + 1;
++ for (g->end = g->start; xdf->rchg[g->end]; g->end++)
++ ;
++
++ return 0;
++ }
++
++ /*
++ * Move g to describe the previous (possibly empty) group in xdf and return 0.
++ * If g is already at the beginning of the file, do nothing and return -1.
++ */
++ static inline int group_previous(xdfile_t *xdf, struct xdlgroup *g)
++ {
++ if (g->start == 0)
++ return -1;
++
++ g->end = g->start - 1;
++ for (g->start = g->end; xdf->rchg[g->start - 1]; g->start--)
++ ;
++
++ return 0;
++ }
++
++ /*
++ * If g can be slid toward the end of the file, do so, and if it bumps into a
++ * following group, expand this group to include it. Return 0 on success or -1
++ * if g cannot be slid down.
++ */
++ static int group_slide_down(xdfile_t *xdf, struct xdlgroup *g, long flags)
++ {
++ if (g->end < xdf->nrec &&
++ recs_match(xdf->recs[g->start], xdf->recs[g->end], flags)) {
++ xdf->rchg[g->start++] = 0;
++ xdf->rchg[g->end++] = 1;
++
++ while (xdf->rchg[g->end])
++ g->end++;
++
++ return 0;
++ } else {
++ return -1;
++ }
++ }
++
++ /*
++ * If g can be slid toward the beginning of the file, do so, and if it bumps
++ * into a previous group, expand this group to include it. Return 0 on success
++ * or -1 if g cannot be slid up.
++ */
++ static int group_slide_up(xdfile_t *xdf, struct xdlgroup *g, long flags)
++ {
++ if (g->start > 0 &&
++ recs_match(xdf->recs[g->start - 1], xdf->recs[g->end - 1], flags)) {
++ xdf->rchg[--g->start] = 1;
++ xdf->rchg[--g->end] = 0;
++
++ while (xdf->rchg[g->start - 1])
++ g->start--;
++
++ return 0;
++ } else {
++ return -1;
++ }
++ }
++
++ static void xdl_bug(const char *msg)
++ {
++ fprintf(stderr, "BUG: %s\n", msg);
++ exit(1);
++ }
++
++ /*
++ * Move back and forward change groups for a consistent and pretty diff output.
++ * This also helps in finding joinable change groups and reducing the diff
++ * size.
++ */
++ int xdl_change_compact(xdfile_t *xdf, xdfile_t *xdfo, long flags) {
++ struct xdlgroup g, go;
++ long earliest_end, end_matching_other;
++ long groupsize;
++
++ group_init(xdf, &g);
++ group_init(xdfo, &go);
++
++ while (1) {
++ /* If the group is empty in the to-be-compacted file, skip it: */
++ if (g.end == g.start)
++ goto next;
++
++ /*
++ * Now shift the change up and then down as far as possible in
++ * each direction. If it bumps into any other changes, merge them.
++ */
++ do {
++ groupsize = g.end - g.start;
++
++ /*
++ * Keep track of the last "end" index that causes this
++ * group to align with a group of changed lines in the
++ * other file. -1 indicates that we haven't found such
++ * a match yet:
++ */
++ end_matching_other = -1;
++
++ /* Shift the group backward as much as possible: */
++ while (!group_slide_up(xdf, &g, flags))
++ if (group_previous(xdfo, &go))
++ xdl_bug("group sync broken sliding up");
++
++ /*
++ * This is this highest that this group can be shifted.
++ * Record its end index:
++ */
++ earliest_end = g.end;
++
++ if (go.end > go.start)
++ end_matching_other = g.end;
++
++ /* Now shift the group forward as far as possible: */
++ while (1) {
++ if (group_slide_down(xdf, &g, flags))
++ break;
++ if (group_next(xdfo, &go))
++ xdl_bug("group sync broken sliding down");
++
++ if (go.end > go.start)
++ end_matching_other = g.end;
++ }
++ } while (groupsize != g.end - g.start);
++
++ /*
++ * If the group can be shifted, then we can possibly use this
++ * freedom to produce a more intuitive diff.
++ *
++ * The group is currently shifted as far down as possible, so the
++ * heuristics below only have to handle upwards shifts.
++ */
++
++ if (g.end == earliest_end) {
++ /* no shifting was possible */
++ } else if (end_matching_other != -1) {
++ /*
++ * Move the possibly merged group of changes back to line
++ * up with the last group of changes from the other file
++ * that it can align with.
++ */
++ while (go.end == go.start) {
++ if (group_slide_up(xdf, &g, flags))
++ xdl_bug("match disappeared");
++ if (group_previous(xdfo, &go))
++ xdl_bug("group sync broken sliding to match");
++ }
++ } else if (flags & XDF_INDENT_HEURISTIC) {
++ /*
++ * Indent heuristic: a group of pure add/delete lines
++ * implies two splits, one between the end of the "before"
++ * context and the start of the group, and another between
++ * the end of the group and the beginning of the "after"
++ * context. Some splits are aesthetically better and some
++ * are worse. We compute a badness "score" for each split,
++ * and add the scores for the two splits to define a
++ * "score" for each position that the group can be shifted
++ * to. Then we pick the shift with the lowest score.
++ */
++ long shift, best_shift = -1;
++ struct split_score best_score;
++
++ shift = earliest_end;
++ if (g.end - groupsize - 1 > shift)
++ shift = g.end - groupsize - 1;
++ if (g.end - INDENT_HEURISTIC_MAX_SLIDING > shift)
++ shift = g.end - INDENT_HEURISTIC_MAX_SLIDING;
++ for (; shift <= g.end; shift++) {
++ struct split_measurement m;
++ struct split_score score = {0, 0};
++
++ measure_split(xdf, shift, &m);
++ score_add_split(&m, &score);
++ measure_split(xdf, shift - groupsize, &m);
++ score_add_split(&m, &score);
++ if (best_shift == -1 ||
++ score_cmp(&score, &best_score) <= 0) {
++ best_score.effective_indent = score.effective_indent;
++ best_score.penalty = score.penalty;
++ best_shift = shift;
++ }
++ }
++
++ while (g.end > best_shift) {
++ if (group_slide_up(xdf, &g, flags))
++ xdl_bug("best shift unreached");
++ if (group_previous(xdfo, &go))
++ xdl_bug("group sync broken sliding to blank line");
++ }
++ }
++
++ next:
++ /* Move past the just-processed group: */
++ if (group_next(xdf, &g))
++ break;
++ if (group_next(xdfo, &go))
++ xdl_bug("group sync broken moving to next group");
++ }
++
++ if (!group_next(xdfo, &go))
++ xdl_bug("group sync broken at end of file");
++
++ return 0;
++ }
++
++
++ int xdl_build_script(xdfenv_t *xe, xdchange_t **xscr) {
++ xdchange_t *cscr = NULL, *xch;
++ char *rchg1 = xe->xdf1.rchg, *rchg2 = xe->xdf2.rchg;
++ long i1, i2, l1, l2;
++
++ /*
++ * Trivial. Collects "groups" of changes and creates an edit script.
++ */
++ for (i1 = xe->xdf1.nrec, i2 = xe->xdf2.nrec; i1 >= 0 || i2 >= 0; i1--, i2--)
++ if (rchg1[i1 - 1] || rchg2[i2 - 1]) {
++ for (l1 = i1; rchg1[i1 - 1]; i1--);
++ for (l2 = i2; rchg2[i2 - 1]; i2--);
++
++ if (!(xch = xdl_add_change(cscr, i1, i2, l1 - i1, l2 - i2))) {
++ xdl_free_script(cscr);
++ return -1;
++ }
++ cscr = xch;
++ }
++
++ *xscr = cscr;
++
++ return 0;
++ }
++
++
++ void xdl_free_script(xdchange_t *xscr) {
++ xdchange_t *xch;
++
++ while ((xch = xscr) != NULL) {
++ xscr = xscr->next;
++ xdl_free(xch);
++ }
++ }
++
++ static int xdl_call_hunk_func(xdfenv_t *xe UNUSED, xdchange_t *xscr, xdemitcb_t *ecb,
++ xdemitconf_t const *xecfg)
++ {
++ xdchange_t *xch, *xche;
++
++ for (xch = xscr; xch; xch = xche->next) {
++ xche = xdl_get_hunk(&xch, xecfg);
++ if (!xch)
++ break;
++ if (xecfg->hunk_func(xch->i1, xche->i1 + xche->chg1 - xch->i1,
++ xch->i2, xche->i2 + xche->chg2 - xch->i2,
++ ecb->priv) < 0)
++ return -1;
++ }
++ return 0;
++ }
++
++ static void xdl_mark_ignorable(xdchange_t *xscr, xdfenv_t *xe, long flags)
++ {
++ xdchange_t *xch;
++
++ for (xch = xscr; xch; xch = xch->next) {
++ int ignore = 1;
++ xrecord_t **rec;
++ long i;
++
++ rec = &xe->xdf1.recs[xch->i1];
++ for (i = 0; i < xch->chg1 && ignore; i++)
++ ignore = xdl_blankline(rec[i]->ptr, rec[i]->size, flags);
++
++ rec = &xe->xdf2.recs[xch->i2];
++ for (i = 0; i < xch->chg2 && ignore; i++)
++ ignore = xdl_blankline(rec[i]->ptr, rec[i]->size, flags);
++
++ xch->ignore = ignore;
++ }
++ }
++
++ int xdl_diff(mmfile_t *mf1, mmfile_t *mf2, xpparam_t const *xpp,
++ xdemitconf_t const *xecfg, xdemitcb_t *ecb) {
++ xdchange_t *xscr;
++ xdfenv_t xe;
++ emit_func_t ef = xecfg->hunk_func ? xdl_call_hunk_func : xdl_emit_diff;
++
++ if (xdl_do_diff(mf1, mf2, xpp, &xe) < 0) {
++
++ return -1;
++ }
++ if (xdl_change_compact(&xe.xdf1, &xe.xdf2, xpp->flags) < 0 ||
++ xdl_change_compact(&xe.xdf2, &xe.xdf1, xpp->flags) < 0 ||
++ xdl_build_script(&xe, &xscr) < 0) {
++
++ xdl_free_env(&xe);
++ return -1;
++ }
++ if (xscr) {
++ if (xpp->flags & XDF_IGNORE_BLANK_LINES)
++ xdl_mark_ignorable(xscr, &xe, xpp->flags);
++
++ if (ef(&xe, xscr, ecb, xecfg) < 0) {
++
++ xdl_free_script(xscr);
++ xdl_free_env(&xe);
++ return -1;
++ }
++ xdl_free_script(xscr);
++ }
++ xdl_free_env(&xe);
++
++ return 0;
++ }
+*** ../vim-8.1.0359/src/xdiff/xdiffi.h 1970-01-01 01:00:00.000000000 +0100
+--- src/xdiff/xdiffi.h 2018-09-10 17:39:20.324083781 +0200
+***************
+*** 0 ****
+--- 1,64 ----
++ /*
++ * LibXDiff by Davide Libenzi ( File Differential Library )
++ * Copyright (C) 2003 Davide Libenzi
++ *
++ * This library is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU Lesser General Public
++ * License as published by the Free Software Foundation; either
++ * version 2.1 of the License, or (at your option) any later version.
++ *
++ * This library is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
++ * Lesser General Public License for more details.
++ *
++ * You should have received a copy of the GNU Lesser General Public
++ * License along with this library; if not, see
++ * <http://www.gnu.org/licenses/>.
++ *
++ * Davide Libenzi <davidel@xmailserver.org>
++ *
++ */
++
++ #if !defined(XDIFFI_H)
++ #define XDIFFI_H
++
++
++ typedef struct s_diffdata {
++ long nrec;
++ unsigned long const *ha;
++ long *rindex;
++ char *rchg;
++ } diffdata_t;
++
++ typedef struct s_xdalgoenv {
++ long mxcost;
++ long snake_cnt;
++ long heur_min;
++ } xdalgoenv_t;
++
++ typedef struct s_xdchange {
++ struct s_xdchange *next;
++ long i1, i2;
++ long chg1, chg2;
++ int ignore;
++ } xdchange_t;
++
++
++
++ int xdl_recs_cmp(diffdata_t *dd1, long off1, long lim1,
++ diffdata_t *dd2, long off2, long lim2,
++ long *kvdf, long *kvdb, int need_min, xdalgoenv_t *xenv);
++ int xdl_do_diff(mmfile_t *mf1, mmfile_t *mf2, xpparam_t const *xpp,
++ xdfenv_t *xe);
++ int xdl_change_compact(xdfile_t *xdf, xdfile_t *xdfo, long flags);
++ int xdl_build_script(xdfenv_t *xe, xdchange_t **xscr);
++ void xdl_free_script(xdchange_t *xscr);
++ int xdl_emit_diff(xdfenv_t *xe, xdchange_t *xscr, xdemitcb_t *ecb,
++ xdemitconf_t const *xecfg);
++ int xdl_do_patience_diff(mmfile_t *mf1, mmfile_t *mf2, xpparam_t const *xpp,
++ xdfenv_t *env);
++ int xdl_do_histogram_diff(mmfile_t *mf1, mmfile_t *mf2, xpparam_t const *xpp,
++ xdfenv_t *env);
++
++ #endif /* #if !defined(XDIFFI_H) */
+*** ../vim-8.1.0359/src/xdiff/xemit.c 1970-01-01 01:00:00.000000000 +0100
+--- src/xdiff/xemit.c 2018-09-10 17:39:20.324083781 +0200
+***************
+*** 0 ****
+--- 1,312 ----
++ /*
++ * LibXDiff by Davide Libenzi ( File Differential Library )
++ * Copyright (C) 2003 Davide Libenzi
++ *
++ * This library is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU Lesser General Public
++ * License as published by the Free Software Foundation; either
++ * version 2.1 of the License, or (at your option) any later version.
++ *
++ * This library is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
++ * Lesser General Public License for more details.
++ *
++ * You should have received a copy of the GNU Lesser General Public
++ * License along with this library; if not, see
++ * <http://www.gnu.org/licenses/>.
++ *
++ * Davide Libenzi <davidel@xmailserver.org>
++ *
++ */
++
++ #include "xinclude.h"
++
++ static long xdl_get_rec(xdfile_t *xdf, long ri, char const **rec) {
++
++ *rec = xdf->recs[ri]->ptr;
++
++ return xdf->recs[ri]->size;
++ }
++
++
++ static int xdl_emit_record(xdfile_t *xdf, long ri, char const *pre, xdemitcb_t *ecb) {
++ long size, psize = strlen(pre);
++ char const *rec;
++
++ size = xdl_get_rec(xdf, ri, &rec);
++ if (xdl_emit_diffrec(rec, size, pre, psize, ecb) < 0) {
++
++ return -1;
++ }
++
++ return 0;
++ }
++
++
++ /*
++ * Starting at the passed change atom, find the latest change atom to be included
++ * inside the differential hunk according to the specified configuration.
++ * Also advance xscr if the first changes must be discarded.
++ */
++ xdchange_t *xdl_get_hunk(xdchange_t **xscr, xdemitconf_t const *xecfg)
++ {
++ xdchange_t *xch, *xchp, *lxch;
++ long max_common = 2 * xecfg->ctxlen + xecfg->interhunkctxlen;
++ long max_ignorable = xecfg->ctxlen;
++ unsigned long ignored = 0; /* number of ignored blank lines */
++
++ /* remove ignorable changes that are too far before other changes */
++ for (xchp = *xscr; xchp && xchp->ignore; xchp = xchp->next) {
++ xch = xchp->next;
++
++ if (xch == NULL ||
++ xch->i1 - (xchp->i1 + xchp->chg1) >= max_ignorable)
++ *xscr = xch;
++ }
++
++ if (*xscr == NULL)
++ return NULL;
++
++ lxch = *xscr;
++
++ for (xchp = *xscr, xch = xchp->next; xch; xchp = xch, xch = xch->next) {
++ long distance = xch->i1 - (xchp->i1 + xchp->chg1);
++ if (distance > max_common)
++ break;
++
++ if (distance < max_ignorable && (!xch->ignore || lxch == xchp)) {
++ lxch = xch;
++ ignored = 0;
++ } else if (distance < max_ignorable && xch->ignore) {
++ ignored += xch->chg2;
++ } else if (lxch != xchp &&
++ xch->i1 + (long)ignored - (lxch->i1 + lxch->chg1) > max_common) {
++ break;
++ } else if (!xch->ignore) {
++ lxch = xch;
++ ignored = 0;
++ } else {
++ ignored += xch->chg2;
++ }
++ }
++
++ return lxch;
++ }
++
++
++ static long def_ff(const char *rec, long len, char *buf, long sz, void *priv UNUSED)
++ {
++ if (len > 0 &&
++ (isalpha((unsigned char)*rec) || /* identifier? */
++ *rec == '_' || /* also identifier? */
++ *rec == '$')) { /* identifiers from VMS and other esoterico */
++ if (len > sz)
++ len = sz;
++ while (0 < len && isspace((unsigned char)rec[len - 1]))
++ len--;
++ memcpy(buf, rec, len);
++ return len;
++ }
++ return -1;
++ }
++
++ static long match_func_rec(xdfile_t *xdf, xdemitconf_t const *xecfg, long ri,
++ char *buf, long sz)
++ {
++ const char *rec;
++ long len = xdl_get_rec(xdf, ri, &rec);
++ if (!xecfg->find_func)
++ return def_ff(rec, len, buf, sz, xecfg->find_func_priv);
++ return xecfg->find_func(rec, len, buf, sz, xecfg->find_func_priv);
++ }
++
++ static int is_func_rec(xdfile_t *xdf, xdemitconf_t const *xecfg, long ri)
++ {
++ char dummy[1];
++ return match_func_rec(xdf, xecfg, ri, dummy, sizeof(dummy)) >= 0;
++ }
++
++ struct func_line {
++ long len;
++ char buf[80];
++ };
++
++ static long get_func_line(xdfenv_t *xe, xdemitconf_t const *xecfg,
++ struct func_line *func_line, long start, long limit)
++ {
++ long l, size, step = (start > limit) ? -1 : 1;
++ char *buf, dummy[1];
++
++ buf = func_line ? func_line->buf : dummy;
++ size = func_line ? sizeof(func_line->buf) : sizeof(dummy);
++
++ for (l = start; l != limit && 0 <= l && l < xe->xdf1.nrec; l += step) {
++ long len = match_func_rec(&xe->xdf1, xecfg, l, buf, size);
++ if (len >= 0) {
++ if (func_line)
++ func_line->len = len;
++ return l;
++ }
++ }
++ return -1;
++ }
++
++ static int is_empty_rec(xdfile_t *xdf, long ri)
++ {
++ const char *rec;
++ long len = xdl_get_rec(xdf, ri, &rec);
++
++ while (len > 0 && XDL_ISSPACE(*rec)) {
++ rec++;
++ len--;
++ }
++ return !len;
++ }
++
++ int xdl_emit_diff(xdfenv_t *xe, xdchange_t *xscr, xdemitcb_t *ecb,
++ xdemitconf_t const *xecfg) {
++ long s1, s2, e1, e2, lctx;
++ xdchange_t *xch, *xche;
++ long funclineprev = -1;
++ struct func_line func_line = { 0 };
++
++ for (xch = xscr; xch; xch = xche->next) {
++ xche = xdl_get_hunk(&xch, xecfg);
++ if (!xch)
++ break;
++
++ s1 = XDL_MAX(xch->i1 - xecfg->ctxlen, 0);
++ s2 = XDL_MAX(xch->i2 - xecfg->ctxlen, 0);
++
++ if (xecfg->flags & XDL_EMIT_FUNCCONTEXT) {
++ long fs1, i1 = xch->i1;
++
++ /* Appended chunk? */
++ if (i1 >= xe->xdf1.nrec) {
++ long i2 = xch->i2;
++
++ /*
++ * We don't need additional context if
++ * a whole function was added.
++ */
++ while (i2 < xe->xdf2.nrec) {
++ if (is_func_rec(&xe->xdf2, xecfg, i2))
++ goto post_context_calculation;
++ i2++;
++ }
++
++ /*
++ * Otherwise get more context from the
++ * pre-image.
++ */
++ i1 = xe->xdf1.nrec - 1;
++ }
++
++ fs1 = get_func_line(xe, xecfg, NULL, i1, -1);
++ while (fs1 > 0 && !is_empty_rec(&xe->xdf1, fs1 - 1) &&
++ !is_func_rec(&xe->xdf1, xecfg, fs1 - 1))
++ fs1--;
++ if (fs1 < 0)
++ fs1 = 0;
++ if (fs1 < s1) {
++ s2 -= s1 - fs1;
++ s1 = fs1;
++ }
++ }
++
++ post_context_calculation:
++ lctx = xecfg->ctxlen;
++ lctx = XDL_MIN(lctx, xe->xdf1.nrec - (xche->i1 + xche->chg1));
++ lctx = XDL_MIN(lctx, xe->xdf2.nrec - (xche->i2 + xche->chg2));
++
++ e1 = xche->i1 + xche->chg1 + lctx;
++ e2 = xche->i2 + xche->chg2 + lctx;
++
++ if (xecfg->flags & XDL_EMIT_FUNCCONTEXT) {
++ long fe1 = get_func_line(xe, xecfg, NULL,
++ xche->i1 + xche->chg1,
++ xe->xdf1.nrec);
++ while (fe1 > 0 && is_empty_rec(&xe->xdf1, fe1 - 1))
++ fe1--;
++ if (fe1 < 0)
++ fe1 = xe->xdf1.nrec;
++ if (fe1 > e1) {
++ e2 += fe1 - e1;
++ e1 = fe1;
++ }
++
++ /*
++ * Overlap with next change? Then include it
++ * in the current hunk and start over to find
++ * its new end.
++ */
++ if (xche->next) {
++ long l = XDL_MIN(xche->next->i1,
++ xe->xdf1.nrec - 1);
++ if (l - xecfg->ctxlen <= e1 ||
++ get_func_line(xe, xecfg, NULL, l, e1) < 0) {
++ xche = xche->next;
++ goto post_context_calculation;
++ }
++ }
++ }
++
++ /*
++ * Emit current hunk header.
++ */
++
++ if (xecfg->flags & XDL_EMIT_FUNCNAMES) {
++ get_func_line(xe, xecfg, &func_line,
++ s1 - 1, funclineprev);
++ funclineprev = s1 - 1;
++ }
++ if (xdl_emit_hunk_hdr(s1 + 1, e1 - s1, s2 + 1, e2 - s2,
++ func_line.buf, func_line.len, ecb) < 0)
++ return -1;
++
++ /*
++ * Emit pre-context.
++ */
++ for (; s2 < xch->i2; s2++)
++ if (xdl_emit_record(&xe->xdf2, s2, " ", ecb) < 0)
++ return -1;
++
++ for (s1 = xch->i1, s2 = xch->i2;; xch = xch->next) {
++ /*
++ * Merge previous with current change atom.
++ */
++ for (; s1 < xch->i1 && s2 < xch->i2; s1++, s2++)
++ if (xdl_emit_record(&xe->xdf2, s2, " ", ecb) < 0)
++ return -1;
++
++ /*
++ * Removes lines from the first file.
++ */
++ for (s1 = xch->i1; s1 < xch->i1 + xch->chg1; s1++)
++ if (xdl_emit_record(&xe->xdf1, s1, "-", ecb) < 0)
++ return -1;
++
++ /*
++ * Adds lines from the second file.
++ */
++ for (s2 = xch->i2; s2 < xch->i2 + xch->chg2; s2++)
++ if (xdl_emit_record(&xe->xdf2, s2, "+", ecb) < 0)
++ return -1;
++
++ if (xch == xche)
++ break;
++ s1 = xch->i1 + xch->chg1;
++ s2 = xch->i2 + xch->chg2;
++ }
++
++ /*
++ * Emit post-context.
++ */
++ for (s2 = xche->i2 + xche->chg2; s2 < e2; s2++)
++ if (xdl_emit_record(&xe->xdf2, s2, " ", ecb) < 0)
++ return -1;
++ }
++
++ return 0;
++ }
+*** ../vim-8.1.0359/src/xdiff/xemit.h 1970-01-01 01:00:00.000000000 +0100
+--- src/xdiff/xemit.h 2018-09-10 17:39:20.324083781 +0200
+***************
+*** 0 ****
+--- 1,36 ----
++ /*
++ * LibXDiff by Davide Libenzi ( File Differential Library )
++ * Copyright (C) 2003 Davide Libenzi
++ *
++ * This library is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU Lesser General Public
++ * License as published by the Free Software Foundation; either
++ * version 2.1 of the License, or (at your option) any later version.
++ *
++ * This library is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
++ * Lesser General Public License for more details.
++ *
++ * You should have received a copy of the GNU Lesser General Public
++ * License along with this library; if not, see
++ * <http://www.gnu.org/licenses/>.
++ *
++ * Davide Libenzi <davidel@xmailserver.org>
++ *
++ */
++
++ #if !defined(XEMIT_H)
++ #define XEMIT_H
++
++
++ typedef int (*emit_func_t)(xdfenv_t *xe, xdchange_t *xscr, xdemitcb_t *ecb,
++ xdemitconf_t const *xecfg);
++
++ xdchange_t *xdl_get_hunk(xdchange_t **xscr, xdemitconf_t const *xecfg);
++ int xdl_emit_diff(xdfenv_t *xe, xdchange_t *xscr, xdemitcb_t *ecb,
++ xdemitconf_t const *xecfg);
++
++
++
++ #endif /* #if !defined(XEMIT_H) */
+*** ../vim-8.1.0359/src/xdiff/xhistogram.c 1970-01-01 01:00:00.000000000 +0100
+--- src/xdiff/xhistogram.c 2018-09-10 17:39:20.324083781 +0200
+***************
+*** 0 ****
+--- 1,386 ----
++ /*
++ * Copyright (C) 2010, Google Inc.
++ * and other copyright owners as documented in JGit's IP log.
++ *
++ * This program and the accompanying materials are made available
++ * under the terms of the Eclipse Distribution License v1.0 which
++ * accompanies this distribution, is reproduced below, and is
++ * available at http://www.eclipse.org/org/documents/edl-v10.php
++ *
++ * All rights reserved.
++ *
++ * Redistribution and use in source and binary forms, with or
++ * without modification, are permitted provided that the following
++ * conditions are met:
++ *
++ * - Redistributions of source code must retain the above copyright
++ * notice, this list of conditions and the following disclaimer.
++ *
++ * - Redistributions in binary form must reproduce the above
++ * copyright notice, this list of conditions and the following
++ * disclaimer in the documentation and/or other materials provided
++ * with the distribution.
++ *
++ * - Neither the name of the Eclipse Foundation, Inc. nor the
++ * names of its contributors may be used to endorse or promote
++ * products derived from this software without specific prior
++ * written permission.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
++ * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
++ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
++ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
++ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
++ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
++ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
++ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
++ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
++ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
++ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
++ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
++ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
++ */
++
++ #include "xinclude.h"
++ #include "xtypes.h"
++ #include "xdiff.h"
++
++ #define MAX_PTR INT_MAX
++ #define MAX_CNT INT_MAX
++
++ #define LINE_END(n) (line##n + count##n - 1)
++ #define LINE_END_PTR(n) (*line##n + *count##n - 1)
++
++ struct histindex {
++ struct record {
++ unsigned int ptr, cnt;
++ struct record *next;
++ } **records, /* an occurrence */
++ **line_map; /* map of line to record chain */
++ chastore_t rcha;
++ unsigned int *next_ptrs;
++ unsigned int table_bits,
++ records_size,
++ line_map_size;
++
++ unsigned int max_chain_length,
++ key_shift,
++ ptr_shift;
++
++ unsigned int cnt,
++ has_common;
++
++ xdfenv_t *env;
++ xpparam_t const *xpp;
++ };
++
++ struct region {
++ unsigned int begin1, end1;
++ unsigned int begin2, end2;
++ };
++
++ #define LINE_MAP(i, a) (i->line_map[(a) - i->ptr_shift])
++
++ #define NEXT_PTR(index, ptr) \
++ (index->next_ptrs[(ptr) - index->ptr_shift])
++
++ #define CNT(index, ptr) \
++ ((LINE_MAP(index, ptr))->cnt)
++
++ #define REC(env, s, l) \
++ (env->xdf##s.recs[l - 1])
++
++ static int cmp_recs(xpparam_t const *xpp,
++ xrecord_t *r1, xrecord_t *r2)
++ {
++ return r1->ha == r2->ha &&
++ xdl_recmatch(r1->ptr, r1->size, r2->ptr, r2->size,
++ xpp->flags);
++ }
++
++ #define CMP_ENV(xpp, env, s1, l1, s2, l2) \
++ (cmp_recs(xpp, REC(env, s1, l1), REC(env, s2, l2)))
++
++ #define CMP(i, s1, l1, s2, l2) \
++ (cmp_recs(i->xpp, REC(i->env, s1, l1), REC(i->env, s2, l2)))
++
++ #define TABLE_HASH(index, side, line) \
++ XDL_HASHLONG((REC(index->env, side, line))->ha, index->table_bits)
++
++ static int scanA(struct histindex *index, int line1, int count1)
++ {
++ int ptr, tbl_idx;
++ unsigned int chain_len;
++ struct record **rec_chain, *rec;
++
++ for (ptr = LINE_END(1); line1 <= ptr; ptr--) {
++ tbl_idx = TABLE_HASH(index, 1, ptr);
++ rec_chain = index->records + tbl_idx;
++ rec = *rec_chain;
++
++ chain_len = 0;
++ while (rec) {
++ if (CMP(index, 1, rec->ptr, 1, ptr)) {
++ /*
++ * ptr is identical to another element. Insert
++ * it onto the front of the existing element
++ * chain.
++ */
++ NEXT_PTR(index, ptr) = rec->ptr;
++ rec->ptr = ptr;
++ /* cap rec->cnt at MAX_CNT */
++ rec->cnt = XDL_MIN(MAX_CNT, rec->cnt + 1);
++ LINE_MAP(index, ptr) = rec;
++ goto continue_scan;
++ }
++
++ rec = rec->next;
++ chain_len++;
++ }
++
++ if (chain_len == index->max_chain_length)
++ return -1;
++
++ /*
++ * This is the first time we have ever seen this particular
++ * element in the sequence. Construct a new chain for it.
++ */
++ if (!(rec = xdl_cha_alloc(&index->rcha)))
++ return -1;
++ rec->ptr = ptr;
++ rec->cnt = 1;
++ rec->next = *rec_chain;
++ *rec_chain = rec;
++ LINE_MAP(index, ptr) = rec;
++
++ continue_scan:
++ ; /* no op */
++ }
++
++ return 0;
++ }
++
++ static int try_lcs(struct histindex *index, struct region *lcs, int b_ptr,
++ int line1, int count1, int line2, int count2)
++ {
++ unsigned int b_next = b_ptr + 1;
++ struct record *rec = index->records[TABLE_HASH(index, 2, b_ptr)];
++ unsigned int as, ae, bs, be, np, rc;
++ int should_break;
++
++ for (; rec; rec = rec->next) {
++ if (rec->cnt > index->cnt) {
++ if (!index->has_common)
++ index->has_common = CMP(index, 1, rec->ptr, 2, b_ptr);
++ continue;
++ }
++
++ as = rec->ptr;
++ if (!CMP(index, 1, as, 2, b_ptr))
++ continue;
++
++ index->has_common = 1;
++ for (;;) {
++ should_break = 0;
++ np = NEXT_PTR(index, as);
++ bs = b_ptr;
++ ae = as;
++ be = bs;
++ rc = rec->cnt;
++
++ while (line1 < (int)as && line2 < (int)bs
++ && CMP(index, 1, as - 1, 2, bs - 1)) {
++ as--;
++ bs--;
++ if (1 < rc)
++ rc = XDL_MIN(rc, CNT(index, as));
++ }
++ while ((int)ae < LINE_END(1) && (int)be < LINE_END(2)
++ && CMP(index, 1, ae + 1, 2, be + 1)) {
++ ae++;
++ be++;
++ if (1 < rc)
++ rc = XDL_MIN(rc, CNT(index, ae));
++ }
++
++ if (b_next <= be)
++ b_next = be + 1;
++ if (lcs->end1 - lcs->begin1 < ae - as || rc < index->cnt) {
++ lcs->begin1 = as;
++ lcs->begin2 = bs;
++ lcs->end1 = ae;
++ lcs->end2 = be;
++ index->cnt = rc;
++ }
++
++ if (np == 0)
++ break;
++
++ while (np <= ae) {
++ np = NEXT_PTR(index, np);
++ if (np == 0) {
++ should_break = 1;
++ break;
++ }
++ }
++
++ if (should_break)
++ break;
++
++ as = np;
++ }
++ }
++ return b_next;
++ }
++
++ static int fall_back_to_classic_diff(xpparam_t const *xpp, xdfenv_t *env,
++ int line1, int count1, int line2, int count2)
++ {
++ xpparam_t xpparam;
++ xpparam.flags = xpp->flags & ~XDF_DIFF_ALGORITHM_MASK;
++
++ return xdl_fall_back_diff(env, &xpparam,
++ line1, count1, line2, count2);
++ }
++
++ static inline void free_index(struct histindex *index)
++ {
++ xdl_free(index->records);
++ xdl_free(index->line_map);
++ xdl_free(index->next_ptrs);
++ xdl_cha_free(&index->rcha);
++ }
++
++ static int find_lcs(xpparam_t const *xpp, xdfenv_t *env,
++ struct region *lcs,
++ int line1, int count1, int line2, int count2)
++ {
++ int b_ptr;
++ int sz, ret = -1;
++ struct histindex index;
++
++ memset(&index, 0, sizeof(index));
++
++ index.env = env;
++ index.xpp = xpp;
++
++ index.records = NULL;
++ index.line_map = NULL;
++ /* in case of early xdl_cha_free() */
++ index.rcha.head = NULL;
++
++ index.table_bits = xdl_hashbits(count1);
++ sz = index.records_size = 1 << index.table_bits;
++ sz *= sizeof(struct record *);
++ if (!(index.records = (struct record **) xdl_malloc(sz)))
++ goto cleanup;
++ memset(index.records, 0, sz);
++
++ sz = index.line_map_size = count1;
++ sz *= sizeof(struct record *);
++ if (!(index.line_map = (struct record **) xdl_malloc(sz)))
++ goto cleanup;
++ memset(index.line_map, 0, sz);
++
++ sz = index.line_map_size;
++ sz *= sizeof(unsigned int);
++ if (!(index.next_ptrs = (unsigned int *) xdl_malloc(sz)))
++ goto cleanup;
++ memset(index.next_ptrs, 0, sz);
++
++ /* lines / 4 + 1 comes from xprepare.c:xdl_prepare_ctx() */
++ if (xdl_cha_init(&index.rcha, sizeof(struct record), count1 / 4 + 1) < 0)
++ goto cleanup;
++
++ index.ptr_shift = line1;
++ index.max_chain_length = 64;
++
++ if (scanA(&index, line1, count1))
++ goto cleanup;
++
++ index.cnt = index.max_chain_length + 1;
++
++ for (b_ptr = line2; b_ptr <= LINE_END(2); )
++ b_ptr = try_lcs(&index, lcs, b_ptr, line1, count1, line2, count2);
++
++ if (index.has_common && index.max_chain_length < index.cnt)
++ ret = 1;
++ else
++ ret = 0;
++
++ cleanup:
++ free_index(&index);
++ return ret;
++ }
++
++ static int histogram_diff(xpparam_t const *xpp, xdfenv_t *env,
++ int line1, int count1, int line2, int count2)
++ {
++ struct region lcs;
++ int lcs_found;
++ int result;
++ redo:
++ result = -1;
++
++ if (count1 <= 0 && count2 <= 0)
++ return 0;
++
++ if (LINE_END(1) >= MAX_PTR)
++ return -1;
++
++ if (!count1) {
++ while(count2--)
++ env->xdf2.rchg[line2++ - 1] = 1;
++ return 0;
++ } else if (!count2) {
++ while(count1--)
++ env->xdf1.rchg[line1++ - 1] = 1;
++ return 0;
++ }
++
++ memset(&lcs, 0, sizeof(lcs));
++ lcs_found = find_lcs(xpp, env, &lcs, line1, count1, line2, count2);
++ if (lcs_found < 0)
++ goto out;
++ else if (lcs_found)
++ result = fall_back_to_classic_diff(xpp, env, line1, count1, line2, count2);
++ else {
++ if (lcs.begin1 == 0 && lcs.begin2 == 0) {
++ while (count1--)
++ env->xdf1.rchg[line1++ - 1] = 1;
++ while (count2--)
++ env->xdf2.rchg[line2++ - 1] = 1;
++ result = 0;
++ } else {
++ result = histogram_diff(xpp, env,
++ line1, lcs.begin1 - line1,
++ line2, lcs.begin2 - line2);
++ if (result)
++ goto out;
++ /*
++ * result = histogram_diff(xpp, env,
++ * lcs.end1 + 1, LINE_END(1) - lcs.end1,
++ * lcs.end2 + 1, LINE_END(2) - lcs.end2);
++ * but let's optimize tail recursion ourself:
++ */
++ count1 = LINE_END(1) - lcs.end1;
++ line1 = lcs.end1 + 1;
++ count2 = LINE_END(2) - lcs.end2;
++ line2 = lcs.end2 + 1;
++ goto redo;
++ }
++ }
++ out:
++ return result;
++ }
++
++ int xdl_do_histogram_diff(mmfile_t *file1, mmfile_t *file2,
++ xpparam_t const *xpp, xdfenv_t *env)
++ {
++ if (xdl_prepare_env(file1, file2, xpp, env) < 0)
++ return -1;
++
++ return histogram_diff(xpp, env,
++ env->xdf1.dstart + 1, env->xdf1.dend - env->xdf1.dstart + 1,
++ env->xdf2.dstart + 1, env->xdf2.dend - env->xdf2.dstart + 1);
++ }
+*** ../vim-8.1.0359/src/xdiff/xinclude.h 1970-01-01 01:00:00.000000000 +0100
+--- src/xdiff/xinclude.h 2018-09-10 17:39:20.324083781 +0200
+***************
+*** 0 ****
+--- 1,61 ----
++ /*
++ * LibXDiff by Davide Libenzi ( File Differential Library )
++ * Copyright (C) 2003 Davide Libenzi
++ *
++ * This library is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU Lesser General Public
++ * License as published by the Free Software Foundation; either
++ * version 2.1 of the License, or (at your option) any later version.
++ *
++ * This library is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
++ * Lesser General Public License for more details.
++ *
++ * You should have received a copy of the GNU Lesser General Public
++ * License along with this library; if not, see
++ * <http://www.gnu.org/licenses/>.
++ *
++ * Davide Libenzi <davidel@xmailserver.org>
++ *
++ */
++
++ /* defines HAVE_ATTRIBUTE_UNUSED */
++ #ifdef HAVE_CONFIG_H
++ # include "../auto/config.h"
++ #endif
++
++ /* Mark unused function arguments with UNUSED, so that gcc -Wunused-parameter
++ * can be used to check for mistakes. */
++ #ifdef HAVE_ATTRIBUTE_UNUSED
++ # define UNUSED __attribute__((unused))
++ #else
++ # define UNUSED
++ #endif
++
++ #if defined(_MSC_VER)
++ # define inline __inline
++ #endif
++
++ #if !defined(XINCLUDE_H)
++ #define XINCLUDE_H
++
++ #include <ctype.h>
++ #include <stdio.h>
++ #include <stdlib.h>
++ #if !defined(_WIN32)
++ #include <unistd.h>
++ #endif
++ #include <string.h>
++ #include <limits.h>
++
++ #include "xmacros.h"
++ #include "xdiff.h"
++ #include "xtypes.h"
++ #include "xutils.h"
++ #include "xprepare.h"
++ #include "xdiffi.h"
++ #include "xemit.h"
++
++
++ #endif /* #if !defined(XINCLUDE_H) */
+*** ../vim-8.1.0359/src/xdiff/xmacros.h 1970-01-01 01:00:00.000000000 +0100
+--- src/xdiff/xmacros.h 2018-09-10 17:39:20.324083781 +0200
+***************
+*** 0 ****
+--- 1,54 ----
++ /*
++ * LibXDiff by Davide Libenzi ( File Differential Library )
++ * Copyright (C) 2003 Davide Libenzi
++ *
++ * This library is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU Lesser General Public
++ * License as published by the Free Software Foundation; either
++ * version 2.1 of the License, or (at your option) any later version.
++ *
++ * This library is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
++ * Lesser General Public License for more details.
++ *
++ * You should have received a copy of the GNU Lesser General Public
++ * License along with this library; if not, see
++ * <http://www.gnu.org/licenses/>.
++ *
++ * Davide Libenzi <davidel@xmailserver.org>
++ *
++ */
++
++ #if !defined(XMACROS_H)
++ #define XMACROS_H
++
++
++
++
++ #define XDL_MIN(a, b) ((a) < (b) ? (a): (b))
++ #define XDL_MAX(a, b) ((a) > (b) ? (a): (b))
++ #define XDL_ABS(v) ((v) >= 0 ? (v): -(v))
++ #define XDL_ISDIGIT(c) ((c) >= '0' && (c) <= '9')
++ #define XDL_ISSPACE(c) (isspace((unsigned char)(c)))
++ #define XDL_ADDBITS(v,b) ((v) + ((v) >> (b)))
++ #define XDL_MASKBITS(b) ((1UL << (b)) - 1)
++ #define XDL_HASHLONG(v,b) (XDL_ADDBITS((unsigned long)(v), b) & XDL_MASKBITS(b))
++ #define XDL_PTRFREE(p) do { if (p) { xdl_free(p); (p) = NULL; } } while (0)
++ #define XDL_LE32_PUT(p, v) \
++ do { \
++ unsigned char *__p = (unsigned char *) (p); \
++ *__p++ = (unsigned char) (v); \
++ *__p++ = (unsigned char) ((v) >> 8); \
++ *__p++ = (unsigned char) ((v) >> 16); \
++ *__p = (unsigned char) ((v) >> 24); \
++ } while (0)
++ #define XDL_LE32_GET(p, v) \
++ do { \
++ unsigned char const *__p = (unsigned char const *) (p); \
++ (v) = (unsigned long) __p[0] | ((unsigned long) __p[1]) << 8 | \
++ ((unsigned long) __p[2]) << 16 | ((unsigned long) __p[3]) << 24; \
++ } while (0)
++
++
++ #endif /* #if !defined(XMACROS_H) */
+*** ../vim-8.1.0359/src/xdiff/xpatience.c 1970-01-01 01:00:00.000000000 +0100
+--- src/xdiff/xpatience.c 2018-09-10 17:39:20.324083781 +0200
+***************
+*** 0 ****
+--- 1,390 ----
++ /*
++ * LibXDiff by Davide Libenzi ( File Differential Library )
++ * Copyright (C) 2003-2016 Davide Libenzi, Johannes E. Schindelin
++ *
++ * This library is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU Lesser General Public
++ * License as published by the Free Software Foundation; either
++ * version 2.1 of the License, or (at your option) any later version.
++ *
++ * This library is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
++ * Lesser General Public License for more details.
++ *
++ * You should have received a copy of the GNU Lesser General Public
++ * License along with this library; if not, see
++ * <http://www.gnu.org/licenses/>.
++ *
++ * Davide Libenzi <davidel@xmailserver.org>
++ *
++ */
++ #include "xinclude.h"
++ #include "xtypes.h"
++ #include "xdiff.h"
++
++ /*
++ * The basic idea of patience diff is to find lines that are unique in
++ * both files. These are intuitively the ones that we want to see as
++ * common lines.
++ *
++ * The maximal ordered sequence of such line pairs (where ordered means
++ * that the order in the sequence agrees with the order of the lines in
++ * both files) naturally defines an initial set of common lines.
++ *
++ * Now, the algorithm tries to extend the set of common lines by growing
++ * the line ranges where the files have identical lines.
++ *
++ * Between those common lines, the patience diff algorithm is applied
++ * recursively, until no unique line pairs can be found; these line ranges
++ * are handled by the well-known Myers algorithm.
++ */
++
++ #define NON_UNIQUE ULONG_MAX
++
++ /*
++ * This is a hash mapping from line hash to line numbers in the first and
++ * second file.
++ */
++ struct hashmap {
++ int nr, alloc;
++ struct entry {
++ unsigned long hash;
++ /*
++ * 0 = unused entry, 1 = first line, 2 = second, etc.
++ * line2 is NON_UNIQUE if the line is not unique
++ * in either the first or the second file.
++ */
++ unsigned long line1, line2;
++ /*
++ * "next" & "previous" are used for the longest common
++ * sequence;
++ * initially, "next" reflects only the order in file1.
++ */
++ struct entry *next, *previous;
++
++ /*
++ * If 1, this entry can serve as an anchor. See
++ * Documentation/diff-options.txt for more information.
++ */
++ unsigned anchor : 1;
++ } *entries, *first, *last;
++ /* were common records found? */
++ unsigned long has_matches;
++ mmfile_t *file1, *file2;
++ xdfenv_t *env;
++ xpparam_t const *xpp;
++ };
++
++ static int is_anchor(xpparam_t const *xpp, const char *line)
++ {
++ size_t i;
++ for (i = 0; i < xpp->anchors_nr; i++) {
++ if (!strncmp(line, xpp->anchors[i], strlen(xpp->anchors[i])))
++ return 1;
++ }
++ return 0;
++ }
++
++ /* The argument "pass" is 1 for the first file, 2 for the second. */
++ static void insert_record(xpparam_t const *xpp, int line, struct hashmap *map,
++ int pass)
++ {
++ xrecord_t **records = pass == 1 ?
++ map->env->xdf1.recs : map->env->xdf2.recs;
++ xrecord_t *record = records[line - 1], *other;
++ /*
++ * After xdl_prepare_env() (or more precisely, due to
++ * xdl_classify_record()), the "ha" member of the records (AKA lines)
++ * is _not_ the hash anymore, but a linearized version of it. In
++ * other words, the "ha" member is guaranteed to start with 0 and
++ * the second record's ha can only be 0 or 1, etc.
++ *
++ * So we multiply ha by 2 in the hope that the hashing was
++ * "unique enough".
++ */
++ int index = (int)((record->ha << 1) % map->alloc);
++
++ while (map->entries[index].line1) {
++ other = map->env->xdf1.recs[map->entries[index].line1 - 1];
++ if (map->entries[index].hash != record->ha ||
++ !xdl_recmatch(record->ptr, record->size,
++ other->ptr, other->size,
++ map->xpp->flags)) {
++ if (++index >= map->alloc)
++ index = 0;
++ continue;
++ }
++ if (pass == 2)
++ map->has_matches = 1;
++ if (pass == 1 || map->entries[index].line2)
++ map->entries[index].line2 = NON_UNIQUE;
++ else
++ map->entries[index].line2 = line;
++ return;
++ }
++ if (pass == 2)
++ return;
++ map->entries[index].line1 = line;
++ map->entries[index].hash = record->ha;
++ map->entries[index].anchor = is_anchor(xpp, map->env->xdf1.recs[line - 1]->ptr);
++ if (!map->first)
++ map->first = map->entries + index;
++ if (map->last) {
++ map->last->next = map->entries + index;
++ map->entries[index].previous = map->last;
++ }
++ map->last = map->entries + index;
++ map->nr++;
++ }
++
++ /*
++ * This function has to be called for each recursion into the inter-hunk
++ * parts, as previously non-unique lines can become unique when being
++ * restricted to a smaller part of the files.
++ *
++ * It is assumed that env has been prepared using xdl_prepare().
++ */
++ static int fill_hashmap(mmfile_t *file1, mmfile_t *file2,
++ xpparam_t const *xpp, xdfenv_t *env,
++ struct hashmap *result,
++ int line1, int count1, int line2, int count2)
++ {
++ result->file1 = file1;
++ result->file2 = file2;
++ result->xpp = xpp;
++ result->env = env;
++
++ /* We know exactly how large we want the hash map */
++ result->alloc = count1 * 2;
++ result->entries = (struct entry *)
++ xdl_malloc(result->alloc * sizeof(struct entry));
++ if (!result->entries)
++ return -1;
++ memset(result->entries, 0, result->alloc * sizeof(struct entry));
++
++ /* First, fill with entries from the first file */
++ while (count1--)
++ insert_record(xpp, line1++, result, 1);
++
++ /* Then search for matches in the second file */
++ while (count2--)
++ insert_record(xpp, line2++, result, 2);
++
++ return 0;
++ }
++
++ /*
++ * Find the longest sequence with a smaller last element (meaning a smaller
++ * line2, as we construct the sequence with entries ordered by line1).
++ */
++ static int binary_search(struct entry **sequence, int longest,
++ struct entry *entry)
++ {
++ int left = -1, right = longest;
++
++ while (left + 1 < right) {
++ int middle = left + (right - left) / 2;
++ /* by construction, no two entries can be equal */
++ if (sequence[middle]->line2 > entry->line2)
++ right = middle;
++ else
++ left = middle;
++ }
++ /* return the index in "sequence", _not_ the sequence length */
++ return left;
++ }
++
++ /*
++ * The idea is to start with the list of common unique lines sorted by
++ * the order in file1. For each of these pairs, the longest (partial)
++ * sequence whose last element's line2 is smaller is determined.
++ *
++ * For efficiency, the sequences are kept in a list containing exactly one
++ * item per sequence length: the sequence with the smallest last
++ * element (in terms of line2).
++ */
++ static struct entry *find_longest_common_sequence(struct hashmap *map)
++ {
++ struct entry **sequence = xdl_malloc(map->nr * sizeof(struct entry *));
++ int longest = 0, i;
++ struct entry *entry;
++
++ /*
++ * If not -1, this entry in sequence must never be overridden.
++ * Therefore, overriding entries before this has no effect, so
++ * do not do that either.
++ */
++ int anchor_i = -1;
++
++ for (entry = map->first; entry; entry = entry->next) {
++ if (!entry->line2 || entry->line2 == NON_UNIQUE)
++ continue;
++ i = binary_search(sequence, longest, entry);
++ entry->previous = i < 0 ? NULL : sequence[i];
++ ++i;
++ if (i <= anchor_i)
++ continue;
++ sequence[i] = entry;
++ if (entry->anchor) {
++ anchor_i = i;
++ longest = anchor_i + 1;
++ } else if (i == longest) {
++ longest++;
++ }
++ }
++
++ /* No common unique lines were found */
++ if (!longest) {
++ xdl_free(sequence);
++ return NULL;
++ }
++
++ /* Iterate starting at the last element, adjusting the "next" members */
++ entry = sequence[longest - 1];
++ entry->next = NULL;
++ while (entry->previous) {
++ entry->previous->next = entry;
++ entry = entry->previous;
++ }
++ xdl_free(sequence);
++ return entry;
++ }
++
++ static int match(struct hashmap *map, int line1, int line2)
++ {
++ xrecord_t *record1 = map->env->xdf1.recs[line1 - 1];
++ xrecord_t *record2 = map->env->xdf2.recs[line2 - 1];
++ return xdl_recmatch(record1->ptr, record1->size,
++ record2->ptr, record2->size, map->xpp->flags);
++ }
++
++ static int patience_diff(mmfile_t *file1, mmfile_t *file2,
++ xpparam_t const *xpp, xdfenv_t *env,
++ int line1, int count1, int line2, int count2);
++
++ static int walk_common_sequence(struct hashmap *map, struct entry *first,
++ int line1, int count1, int line2, int count2)
++ {
++ int end1 = line1 + count1, end2 = line2 + count2;
++ int next1, next2;
++
++ for (;;) {
++ /* Try to grow the line ranges of common lines */
++ if (first) {
++ next1 = first->line1;
++ next2 = first->line2;
++ while (next1 > line1 && next2 > line2 &&
++ match(map, next1 - 1, next2 - 1)) {
++ next1--;
++ next2--;
++ }
++ } else {
++ next1 = end1;
++ next2 = end2;
++ }
++ while (line1 < next1 && line2 < next2 &&
++ match(map, line1, line2)) {
++ line1++;
++ line2++;
++ }
++
++ /* Recurse */
++ if (next1 > line1 || next2 > line2) {
++ struct hashmap submap;
++
++ memset(&submap, 0, sizeof(submap));
++ if (patience_diff(map->file1, map->file2,
++ map->xpp, map->env,
++ line1, next1 - line1,
++ line2, next2 - line2))
++ return -1;
++ }
++
++ if (!first)
++ return 0;
++
++ while (first->next &&
++ first->next->line1 == first->line1 + 1 &&
++ first->next->line2 == first->line2 + 1)
++ first = first->next;
++
++ line1 = first->line1 + 1;
++ line2 = first->line2 + 1;
++
++ first = first->next;
++ }
++ }
++
++ static int fall_back_to_classic_diff(struct hashmap *map,
++ int line1, int count1, int line2, int count2)
++ {
++ xpparam_t xpp;
++ xpp.flags = map->xpp->flags & ~XDF_DIFF_ALGORITHM_MASK;
++
++ return xdl_fall_back_diff(map->env, &xpp,
++ line1, count1, line2, count2);
++ }
++
++ /*
++ * Recursively find the longest common sequence of unique lines,
++ * and if none was found, ask xdl_do_diff() to do the job.
++ *
++ * This function assumes that env was prepared with xdl_prepare_env().
++ */
++ static int patience_diff(mmfile_t *file1, mmfile_t *file2,
++ xpparam_t const *xpp, xdfenv_t *env,
++ int line1, int count1, int line2, int count2)
++ {
++ struct hashmap map;
++ struct entry *first;
++ int result = 0;
++
++ /* trivial case: one side is empty */
++ if (!count1) {
++ while(count2--)
++ env->xdf2.rchg[line2++ - 1] = 1;
++ return 0;
++ } else if (!count2) {
++ while(count1--)
++ env->xdf1.rchg[line1++ - 1] = 1;
++ return 0;
++ }
++
++ memset(&map, 0, sizeof(map));
++ if (fill_hashmap(file1, file2, xpp, env, &map,
++ line1, count1, line2, count2))
++ return -1;
++
++ /* are there any matching lines at all? */
++ if (!map.has_matches) {
++ while(count1--)
++ env->xdf1.rchg[line1++ - 1] = 1;
++ while(count2--)
++ env->xdf2.rchg[line2++ - 1] = 1;
++ xdl_free(map.entries);
++ return 0;
++ }
++
++ first = find_longest_common_sequence(&map);
++ if (first)
++ result = walk_common_sequence(&map, first,
++ line1, count1, line2, count2);
++ else
++ result = fall_back_to_classic_diff(&map,
++ line1, count1, line2, count2);
++
++ xdl_free(map.entries);
++ return result;
++ }
++
++ int xdl_do_patience_diff(mmfile_t *file1, mmfile_t *file2,
++ xpparam_t const *xpp, xdfenv_t *env)
++ {
++ if (xdl_prepare_env(file1, file2, xpp, env) < 0)
++ return -1;
++
++ /* environment is cleaned up in xdl_diff() */
++ return patience_diff(file1, file2, xpp, env,
++ 1, env->xdf1.nrec, 1, env->xdf2.nrec);
++ }
+*** ../vim-8.1.0359/src/xdiff/xprepare.c 1970-01-01 01:00:00.000000000 +0100
+--- src/xdiff/xprepare.c 2018-09-10 17:39:20.324083781 +0200
+***************
+*** 0 ****
+--- 1,483 ----
++ /*
++ * LibXDiff by Davide Libenzi ( File Differential Library )
++ * Copyright (C) 2003 Davide Libenzi
++ *
++ * This library is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU Lesser General Public
++ * License as published by the Free Software Foundation; either
++ * version 2.1 of the License, or (at your option) any later version.
++ *
++ * This library is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
++ * Lesser General Public License for more details.
++ *
++ * You should have received a copy of the GNU Lesser General Public
++ * License along with this library; if not, see
++ * <http://www.gnu.org/licenses/>.
++ *
++ * Davide Libenzi <davidel@xmailserver.org>
++ *
++ */
++
++ #include "xinclude.h"
++
++
++ #define XDL_KPDIS_RUN 4
++ #define XDL_MAX_EQLIMIT 1024
++ #define XDL_SIMSCAN_WINDOW 100
++ #define XDL_GUESS_NLINES1 256
++ #define XDL_GUESS_NLINES2 20
++
++
++ typedef struct s_xdlclass {
++ struct s_xdlclass *next;
++ unsigned long ha;
++ char const *line;
++ long size;
++ long idx;
++ long len1, len2;
++ } xdlclass_t;
++
++ typedef struct s_xdlclassifier {
++ unsigned int hbits;
++ long hsize;
++ xdlclass_t **rchash;
++ chastore_t ncha;
++ xdlclass_t **rcrecs;
++ long alloc;
++ long count;
++ long flags;
++ } xdlclassifier_t;
++
++
++
++
++ static int xdl_init_classifier(xdlclassifier_t *cf, long size, long flags);
++ static void xdl_free_classifier(xdlclassifier_t *cf);
++ static int xdl_classify_record(unsigned int pass, xdlclassifier_t *cf, xrecord_t **rhash,
++ unsigned int hbits, xrecord_t *rec);
++ static int xdl_prepare_ctx(unsigned int pass, mmfile_t *mf, long narec, xpparam_t const *xpp,
++ xdlclassifier_t *cf, xdfile_t *xdf);
++ static void xdl_free_ctx(xdfile_t *xdf);
++ static int xdl_clean_mmatch(char const *dis, long i, long s, long e);
++ static int xdl_cleanup_records(xdlclassifier_t *cf, xdfile_t *xdf1, xdfile_t *xdf2);
++ static int xdl_trim_ends(xdfile_t *xdf1, xdfile_t *xdf2);
++ static int xdl_optimize_ctxs(xdlclassifier_t *cf, xdfile_t *xdf1, xdfile_t *xdf2);
++
++
++
++
++ static int xdl_init_classifier(xdlclassifier_t *cf, long size, long flags) {
++ cf->flags = flags;
++
++ cf->hbits = xdl_hashbits((unsigned int) size);
++ cf->hsize = 1 << cf->hbits;
++
++ if (xdl_cha_init(&cf->ncha, sizeof(xdlclass_t), size / 4 + 1) < 0) {
++
++ return -1;
++ }
++ if (!(cf->rchash = (xdlclass_t **) xdl_malloc(cf->hsize * sizeof(xdlclass_t *)))) {
++
++ xdl_cha_free(&cf->ncha);
++ return -1;
++ }
++ memset(cf->rchash, 0, cf->hsize * sizeof(xdlclass_t *));
++
++ cf->alloc = size;
++ if (!(cf->rcrecs = (xdlclass_t **) xdl_malloc(cf->alloc * sizeof(xdlclass_t *)))) {
++
++ xdl_free(cf->rchash);
++ xdl_cha_free(&cf->ncha);
++ return -1;
++ }
++
++ cf->count = 0;
++
++ return 0;
++ }
++
++
++ static void xdl_free_classifier(xdlclassifier_t *cf) {
++
++ xdl_free(cf->rcrecs);
++ xdl_free(cf->rchash);
++ xdl_cha_free(&cf->ncha);
++ }
++
++
++ static int xdl_classify_record(unsigned int pass, xdlclassifier_t *cf, xrecord_t **rhash,
++ unsigned int hbits, xrecord_t *rec) {
++ long hi;
++ char const *line;
++ xdlclass_t *rcrec;
++ xdlclass_t **rcrecs;
++
++ line = rec->ptr;
++ hi = (long) XDL_HASHLONG(rec->ha, cf->hbits);
++ for (rcrec = cf->rchash[hi]; rcrec; rcrec = rcrec->next)
++ if (rcrec->ha == rec->ha &&
++ xdl_recmatch(rcrec->line, rcrec->size,
++ rec->ptr, rec->size, cf->flags))
++ break;
++
++ if (!rcrec) {
++ if (!(rcrec = xdl_cha_alloc(&cf->ncha))) {
++
++ return -1;
++ }
++ rcrec->idx = cf->count++;
++ if (cf->count > cf->alloc) {
++ cf->alloc *= 2;
++ if (!(rcrecs = (xdlclass_t **) xdl_realloc(cf->rcrecs, cf->alloc * sizeof(xdlclass_t *)))) {
++
++ return -1;
++ }
++ cf->rcrecs = rcrecs;
++ }
++ cf->rcrecs[rcrec->idx] = rcrec;
++ rcrec->line = line;
++ rcrec->size = rec->size;
++ rcrec->ha = rec->ha;
++ rcrec->len1 = rcrec->len2 = 0;
++ rcrec->next = cf->rchash[hi];
++ cf->rchash[hi] = rcrec;
++ }
++
++ (pass == 1) ? rcrec->len1++ : rcrec->len2++;
++
++ rec->ha = (unsigned long) rcrec->idx;
++
++ hi = (long) XDL_HASHLONG(rec->ha, hbits);
++ rec->next = rhash[hi];
++ rhash[hi] = rec;
++
++ return 0;
++ }
++
++
++ static int xdl_prepare_ctx(unsigned int pass, mmfile_t *mf, long narec, xpparam_t const *xpp,
++ xdlclassifier_t *cf, xdfile_t *xdf) {
++ unsigned int hbits;
++ long nrec, hsize, bsize;
++ unsigned long hav;
++ char const *blk, *cur, *top, *prev;
++ xrecord_t *crec;
++ xrecord_t **recs, **rrecs;
++ xrecord_t **rhash;
++ unsigned long *ha;
++ char *rchg;
++ long *rindex;
++
++ ha = NULL;
++ rindex = NULL;
++ rchg = NULL;
++ rhash = NULL;
++ recs = NULL;
++
++ if (xdl_cha_init(&xdf->rcha, sizeof(xrecord_t), narec / 4 + 1) < 0)
++ goto abort;
++ if (!(recs = (xrecord_t **) xdl_malloc(narec * sizeof(xrecord_t *))))
++ goto abort;
++
++ if (XDF_DIFF_ALG(xpp->flags) == XDF_HISTOGRAM_DIFF)
++ hbits = hsize = 0;
++ else {
++ hbits = xdl_hashbits((unsigned int) narec);
++ hsize = 1 << hbits;
++ if (!(rhash = (xrecord_t **) xdl_malloc(hsize * sizeof(xrecord_t *))))
++ goto abort;
++ memset(rhash, 0, hsize * sizeof(xrecord_t *));
++ }
++
++ nrec = 0;
++ if ((cur = blk = xdl_mmfile_first(mf, &bsize)) != NULL) {
++ for (top = blk + bsize; cur < top; ) {
++ prev = cur;
++ hav = xdl_hash_record(&cur, top, xpp->flags);
++ if (nrec >= narec) {
++ narec *= 2;
++ if (!(rrecs = (xrecord_t **) xdl_realloc(recs, narec * sizeof(xrecord_t *))))
++ goto abort;
++ recs = rrecs;
++ }
++ if (!(crec = xdl_cha_alloc(&xdf->rcha)))
++ goto abort;
++ crec->ptr = prev;
++ crec->size = (long) (cur - prev);
++ crec->ha = hav;
++ recs[nrec++] = crec;
++
++ if ((XDF_DIFF_ALG(xpp->flags) != XDF_HISTOGRAM_DIFF) &&
++ xdl_classify_record(pass, cf, rhash, hbits, crec) < 0)
++ goto abort;
++ }
++ }
++
++ if (!(rchg = (char *) xdl_malloc((nrec + 2) * sizeof(char))))
++ goto abort;
++ memset(rchg, 0, (nrec + 2) * sizeof(char));
++
++ if (!(rindex = (long *) xdl_malloc((nrec + 1) * sizeof(long))))
++ goto abort;
++ if (!(ha = (unsigned long *) xdl_malloc((nrec + 1) * sizeof(unsigned long))))
++ goto abort;
++
++ xdf->nrec = nrec;
++ xdf->recs = recs;
++ xdf->hbits = hbits;
++ xdf->rhash = rhash;
++ xdf->rchg = rchg + 1;
++ xdf->rindex = rindex;
++ xdf->nreff = 0;
++ xdf->ha = ha;
++ xdf->dstart = 0;
++ xdf->dend = nrec - 1;
++
++ return 0;
++
++ abort:
++ xdl_free(ha);
++ xdl_free(rindex);
++ xdl_free(rchg);
++ xdl_free(rhash);
++ xdl_free(recs);
++ xdl_cha_free(&xdf->rcha);
++ return -1;
++ }
++
++
++ static void xdl_free_ctx(xdfile_t *xdf) {
++
++ xdl_free(xdf->rhash);
++ xdl_free(xdf->rindex);
++ xdl_free(xdf->rchg - 1);
++ xdl_free(xdf->ha);
++ xdl_free(xdf->recs);
++ xdl_cha_free(&xdf->rcha);
++ }
++
++
++ int xdl_prepare_env(mmfile_t *mf1, mmfile_t *mf2, xpparam_t const *xpp,
++ xdfenv_t *xe) {
++ long enl1, enl2, sample;
++ xdlclassifier_t cf;
++
++ memset(&cf, 0, sizeof(cf));
++
++ /*
++ * For histogram diff, we can afford a smaller sample size and
++ * thus a poorer estimate of the number of lines, as the hash
++ * table (rhash) won't be filled up/grown. The number of lines
++ * (nrecs) will be updated correctly anyway by
++ * xdl_prepare_ctx().
++ */
++ sample = (XDF_DIFF_ALG(xpp->flags) == XDF_HISTOGRAM_DIFF
++ ? XDL_GUESS_NLINES2 : XDL_GUESS_NLINES1);
++
++ enl1 = xdl_guess_lines(mf1, sample) + 1;
++ enl2 = xdl_guess_lines(mf2, sample) + 1;
++
++ if (XDF_DIFF_ALG(xpp->flags) != XDF_HISTOGRAM_DIFF &&
++ xdl_init_classifier(&cf, enl1 + enl2 + 1, xpp->flags) < 0)
++ return -1;
++
++ if (xdl_prepare_ctx(1, mf1, enl1, xpp, &cf, &xe->xdf1) < 0) {
++
++ xdl_free_classifier(&cf);
++ return -1;
++ }
++ if (xdl_prepare_ctx(2, mf2, enl2, xpp, &cf, &xe->xdf2) < 0) {
++
++ xdl_free_ctx(&xe->xdf1);
++ xdl_free_classifier(&cf);
++ return -1;
++ }
++
++ if ((XDF_DIFF_ALG(xpp->flags) != XDF_PATIENCE_DIFF) &&
++ (XDF_DIFF_ALG(xpp->flags) != XDF_HISTOGRAM_DIFF) &&
++ xdl_optimize_ctxs(&cf, &xe->xdf1, &xe->xdf2) < 0) {
++
++ xdl_free_ctx(&xe->xdf2);
++ xdl_free_ctx(&xe->xdf1);
++ xdl_free_classifier(&cf);
++ return -1;
++ }
++
++ if (XDF_DIFF_ALG(xpp->flags) != XDF_HISTOGRAM_DIFF)
++ xdl_free_classifier(&cf);
++
++ return 0;
++ }
++
++
++ void xdl_free_env(xdfenv_t *xe) {
++
++ xdl_free_ctx(&xe->xdf2);
++ xdl_free_ctx(&xe->xdf1);
++ }
++
++
++ static int xdl_clean_mmatch(char const *dis, long i, long s, long e) {
++ long r, rdis0, rpdis0, rdis1, rpdis1;
++
++ /*
++ * Limits the window the is examined during the similar-lines
++ * scan. The loops below stops when dis[i - r] == 1 (line that
++ * has no match), but there are corner cases where the loop
++ * proceed all the way to the extremities by causing huge
++ * performance penalties in case of big files.
++ */
++ if (i - s > XDL_SIMSCAN_WINDOW)
++ s = i - XDL_SIMSCAN_WINDOW;
++ if (e - i > XDL_SIMSCAN_WINDOW)
++ e = i + XDL_SIMSCAN_WINDOW;
++
++ /*
++ * Scans the lines before 'i' to find a run of lines that either
++ * have no match (dis[j] == 0) or have multiple matches (dis[j] > 1).
++ * Note that we always call this function with dis[i] > 1, so the
++ * current line (i) is already a multimatch line.
++ */
++ for (r = 1, rdis0 = 0, rpdis0 = 1; (i - r) >= s; r++) {
++ if (!dis[i - r])
++ rdis0++;
++ else if (dis[i - r] == 2)
++ rpdis0++;
++ else
++ break;
++ }
++ /*
++ * If the run before the line 'i' found only multimatch lines, we
++ * return 0 and hence we don't make the current line (i) discarded.
++ * We want to discard multimatch lines only when they appear in the
++ * middle of runs with nomatch lines (dis[j] == 0).
++ */
++ if (rdis0 == 0)
++ return 0;
++ for (r = 1, rdis1 = 0, rpdis1 = 1; (i + r) <= e; r++) {
++ if (!dis[i + r])
++ rdis1++;
++ else if (dis[i + r] == 2)
++ rpdis1++;
++ else
++ break;
++ }
++ /*
++ * If the run after the line 'i' found only multimatch lines, we
++ * return 0 and hence we don't make the current line (i) discarded.
++ */
++ if (rdis1 == 0)
++ return 0;
++ rdis1 += rdis0;
++ rpdis1 += rpdis0;
++
++ return rpdis1 * XDL_KPDIS_RUN < (rpdis1 + rdis1);
++ }
++
++
++ /*
++ * Try to reduce the problem complexity, discard records that have no
++ * matches on the other file. Also, lines that have multiple matches
++ * might be potentially discarded if they happear in a run of discardable.
++ */
++ static int xdl_cleanup_records(xdlclassifier_t *cf, xdfile_t *xdf1, xdfile_t *xdf2) {
++ long i, nm, nreff, mlim;
++ xrecord_t **recs;
++ xdlclass_t *rcrec;
++ char *dis, *dis1, *dis2;
++
++ if (!(dis = (char *) xdl_malloc(xdf1->nrec + xdf2->nrec + 2))) {
++
++ return -1;
++ }
++ memset(dis, 0, xdf1->nrec + xdf2->nrec + 2);
++ dis1 = dis;
++ dis2 = dis1 + xdf1->nrec + 1;
++
++ if ((mlim = xdl_bogosqrt(xdf1->nrec)) > XDL_MAX_EQLIMIT)
++ mlim = XDL_MAX_EQLIMIT;
++ for (i = xdf1->dstart, recs = &xdf1->recs[xdf1->dstart]; i <= xdf1->dend; i++, recs++) {
++ rcrec = cf->rcrecs[(*recs)->ha];
++ nm = rcrec ? rcrec->len2 : 0;
++ dis1[i] = (nm == 0) ? 0: (nm >= mlim) ? 2: 1;
++ }
++
++ if ((mlim = xdl_bogosqrt(xdf2->nrec)) > XDL_MAX_EQLIMIT)
++ mlim = XDL_MAX_EQLIMIT;
++ for (i = xdf2->dstart, recs = &xdf2->recs[xdf2->dstart]; i <= xdf2->dend; i++, recs++) {
++ rcrec = cf->rcrecs[(*recs)->ha];
++ nm = rcrec ? rcrec->len1 : 0;
++ dis2[i] = (nm == 0) ? 0: (nm >= mlim) ? 2: 1;
++ }
++
++ for (nreff = 0, i = xdf1->dstart, recs = &xdf1->recs[xdf1->dstart];
++ i <= xdf1->dend; i++, recs++) {
++ if (dis1[i] == 1 ||
++ (dis1[i] == 2 && !xdl_clean_mmatch(dis1, i, xdf1->dstart, xdf1->dend))) {
++ xdf1->rindex[nreff] = i;
++ xdf1->ha[nreff] = (*recs)->ha;
++ nreff++;
++ } else
++ xdf1->rchg[i] = 1;
++ }
++ xdf1->nreff = nreff;
++
++ for (nreff = 0, i = xdf2->dstart, recs = &xdf2->recs[xdf2->dstart];
++ i <= xdf2->dend; i++, recs++) {
++ if (dis2[i] == 1 ||
++ (dis2[i] == 2 && !xdl_clean_mmatch(dis2, i, xdf2->dstart, xdf2->dend))) {
++ xdf2->rindex[nreff] = i;
++ xdf2->ha[nreff] = (*recs)->ha;
++ nreff++;
++ } else
++ xdf2->rchg[i] = 1;
++ }
++ xdf2->nreff = nreff;
++
++ xdl_free(dis);
++
++ return 0;
++ }
++
++
++ /*
++ * Early trim initial and terminal matching records.
++ */
++ static int xdl_trim_ends(xdfile_t *xdf1, xdfile_t *xdf2) {
++ long i, lim;
++ xrecord_t **recs1, **recs2;
++
++ recs1 = xdf1->recs;
++ recs2 = xdf2->recs;
++ for (i = 0, lim = XDL_MIN(xdf1->nrec, xdf2->nrec); i < lim;
++ i++, recs1++, recs2++)
++ if ((*recs1)->ha != (*recs2)->ha)
++ break;
++
++ xdf1->dstart = xdf2->dstart = i;
++
++ recs1 = xdf1->recs + xdf1->nrec - 1;
++ recs2 = xdf2->recs + xdf2->nrec - 1;
++ for (lim -= i, i = 0; i < lim; i++, recs1--, recs2--)
++ if ((*recs1)->ha != (*recs2)->ha)
++ break;
++
++ xdf1->dend = xdf1->nrec - i - 1;
++ xdf2->dend = xdf2->nrec - i - 1;
++
++ return 0;
++ }
++
++
++ static int xdl_optimize_ctxs(xdlclassifier_t *cf, xdfile_t *xdf1, xdfile_t *xdf2) {
++
++ if (xdl_trim_ends(xdf1, xdf2) < 0 ||
++ xdl_cleanup_records(cf, xdf1, xdf2) < 0) {
++
++ return -1;
++ }
++
++ return 0;
++ }
+*** ../vim-8.1.0359/src/xdiff/xprepare.h 1970-01-01 01:00:00.000000000 +0100
+--- src/xdiff/xprepare.h 2018-09-10 17:39:20.324083781 +0200
+***************
+*** 0 ****
+--- 1,34 ----
++ /*
++ * LibXDiff by Davide Libenzi ( File Differential Library )
++ * Copyright (C) 2003 Davide Libenzi
++ *
++ * This library is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU Lesser General Public
++ * License as published by the Free Software Foundation; either
++ * version 2.1 of the License, or (at your option) any later version.
++ *
++ * This library is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
++ * Lesser General Public License for more details.
++ *
++ * You should have received a copy of the GNU Lesser General Public
++ * License along with this library; if not, see
++ * <http://www.gnu.org/licenses/>.
++ *
++ * Davide Libenzi <davidel@xmailserver.org>
++ *
++ */
++
++ #if !defined(XPREPARE_H)
++ #define XPREPARE_H
++
++
++
++ int xdl_prepare_env(mmfile_t *mf1, mmfile_t *mf2, xpparam_t const *xpp,
++ xdfenv_t *xe);
++ void xdl_free_env(xdfenv_t *xe);
++
++
++
++ #endif /* #if !defined(XPREPARE_H) */
+*** ../vim-8.1.0359/src/xdiff/xtypes.h 1970-01-01 01:00:00.000000000 +0100
+--- src/xdiff/xtypes.h 2018-09-10 17:39:20.324083781 +0200
+***************
+*** 0 ****
+--- 1,67 ----
++ /*
++ * LibXDiff by Davide Libenzi ( File Differential Library )
++ * Copyright (C) 2003 Davide Libenzi
++ *
++ * This library is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU Lesser General Public
++ * License as published by the Free Software Foundation; either
++ * version 2.1 of the License, or (at your option) any later version.
++ *
++ * This library is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
++ * Lesser General Public License for more details.
++ *
++ * You should have received a copy of the GNU Lesser General Public
++ * License along with this library; if not, see
++ * <http://www.gnu.org/licenses/>.
++ *
++ * Davide Libenzi <davidel@xmailserver.org>
++ *
++ */
++
++ #if !defined(XTYPES_H)
++ #define XTYPES_H
++
++
++
++ typedef struct s_chanode {
++ struct s_chanode *next;
++ long icurr;
++ } chanode_t;
++
++ typedef struct s_chastore {
++ chanode_t *head, *tail;
++ long isize, nsize;
++ chanode_t *ancur;
++ chanode_t *sncur;
++ long scurr;
++ } chastore_t;
++
++ typedef struct s_xrecord {
++ struct s_xrecord *next;
++ char const *ptr;
++ long size;
++ unsigned long ha;
++ } xrecord_t;
++
++ typedef struct s_xdfile {
++ chastore_t rcha;
++ long nrec;
++ unsigned int hbits;
++ xrecord_t **rhash;
++ long dstart, dend;
++ xrecord_t **recs;
++ char *rchg;
++ long *rindex;
++ long nreff;
++ unsigned long *ha;
++ } xdfile_t;
++
++ typedef struct s_xdfenv {
++ xdfile_t xdf1, xdf2;
++ } xdfenv_t;
++
++
++
++ #endif /* #if !defined(XTYPES_H) */
+*** ../vim-8.1.0359/src/xdiff/xutils.c 1970-01-01 01:00:00.000000000 +0100
+--- src/xdiff/xutils.c 2018-09-10 17:39:20.324083781 +0200
+***************
+*** 0 ****
+--- 1,425 ----
++ /*
++ * LibXDiff by Davide Libenzi ( File Differential Library )
++ * Copyright (C) 2003 Davide Libenzi
++ *
++ * This library is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU Lesser General Public
++ * License as published by the Free Software Foundation; either
++ * version 2.1 of the License, or (at your option) any later version.
++ *
++ * This library is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
++ * Lesser General Public License for more details.
++ *
++ * You should have received a copy of the GNU Lesser General Public
++ * License along with this library; if not, see
++ * <http://www.gnu.org/licenses/>.
++ *
++ * Davide Libenzi <davidel@xmailserver.org>
++ *
++ */
++
++ #include <limits.h>
++ #include <assert.h>
++ #include "xinclude.h"
++
++
++
++
++ long xdl_bogosqrt(long n) {
++ long i;
++
++ /*
++ * Classical integer square root approximation using shifts.
++ */
++ for (i = 1; n > 0; n >>= 2)
++ i <<= 1;
++
++ return i;
++ }
++
++
++ int xdl_emit_diffrec(char const *rec, long size, char const *pre, long psize,
++ xdemitcb_t *ecb) {
++ int i = 2;
++ mmbuffer_t mb[3];
++
++ mb[0].ptr = (char *) pre;
++ mb[0].size = psize;
++ mb[1].ptr = (char *) rec;
++ mb[1].size = size;
++ if (size > 0 && rec[size - 1] != '\n') {
++ mb[2].ptr = (char *) "\n\\ No newline at end of file\n";
++ mb[2].size = strlen(mb[2].ptr);
++ i++;
++ }
++ if (ecb->outf(ecb->priv, mb, i) < 0) {
++
++ return -1;
++ }
++
++ return 0;
++ }
++
++ void *xdl_mmfile_first(mmfile_t *mmf, long *size)
++ {
++ *size = mmf->size;
++ return mmf->ptr;
++ }
++
++
++ long xdl_mmfile_size(mmfile_t *mmf)
++ {
++ return mmf->size;
++ }
++
++
++ int xdl_cha_init(chastore_t *cha, long isize, long icount) {
++
++ cha->head = cha->tail = NULL;
++ cha->isize = isize;
++ cha->nsize = icount * isize;
++ cha->ancur = cha->sncur = NULL;
++ cha->scurr = 0;
++
++ return 0;
++ }
++
++
++ void xdl_cha_free(chastore_t *cha) {
++ chanode_t *cur, *tmp;
++
++ for (cur = cha->head; (tmp = cur) != NULL;) {
++ cur = cur->next;
++ xdl_free(tmp);
++ }
++ }
++
++
++ void *xdl_cha_alloc(chastore_t *cha) {
++ chanode_t *ancur;
++ void *data;
++
++ if (!(ancur = cha->ancur) || ancur->icurr == cha->nsize) {
++ if (!(ancur = (chanode_t *) xdl_malloc(sizeof(chanode_t) + cha->nsize))) {
++
++ return NULL;
++ }
++ ancur->icurr = 0;
++ ancur->next = NULL;
++ if (cha->tail)
++ cha->tail->next = ancur;
++ if (!cha->head)
++ cha->head = ancur;
++ cha->tail = ancur;
++ cha->ancur = ancur;
++ }
++
++ data = (char *) ancur + sizeof(chanode_t) + ancur->icurr;
++ ancur->icurr += cha->isize;
++
++ return data;
++ }
++
++ long xdl_guess_lines(mmfile_t *mf, long sample) {
++ long nl = 0, size, tsize = 0;
++ char const *data, *cur, *top;
++
++ if ((cur = data = xdl_mmfile_first(mf, &size)) != NULL) {
++ for (top = data + size; nl < sample && cur < top; ) {
++ nl++;
++ if (!(cur = memchr(cur, '\n', top - cur)))
++ cur = top;
++ else
++ cur++;
++ }
++ tsize += (long) (cur - data);
++ }
++
++ if (nl && tsize)
++ nl = xdl_mmfile_size(mf) / (tsize / nl);
++
++ return nl + 1;
++ }
++
++ int xdl_blankline(const char *line, long size, long flags)
++ {
++ long i;
++
++ if (!(flags & XDF_WHITESPACE_FLAGS))
++ return (size <= 1);
++
++ for (i = 0; i < size && XDL_ISSPACE(line[i]); i++)
++ ;
++
++ return (i == size);
++ }
++
++ /*
++ * Have we eaten everything on the line, except for an optional
++ * CR at the very end?
++ */
++ static int ends_with_optional_cr(const char *l, long s, long i)
++ {
++ int complete = s && l[s-1] == '\n';
++
++ if (complete)
++ s--;
++ if (s == i)
++ return 1;
++ /* do not ignore CR at the end of an incomplete line */
++ if (complete && s == i + 1 && l[i] == '\r')
++ return 1;
++ return 0;
++ }
++
++ int xdl_recmatch(const char *l1, long s1, const char *l2, long s2, long flags)
++ {
++ int i1, i2;
++
++ if (s1 == s2 && !memcmp(l1, l2, s1))
++ return 1;
++ if (!(flags & XDF_WHITESPACE_FLAGS))
++ return 0;
++
++ i1 = 0;
++ i2 = 0;
++
++ /*
++ * -w matches everything that matches with -b, and -b in turn
++ * matches everything that matches with --ignore-space-at-eol,
++ * which in turn matches everything that matches with --ignore-cr-at-eol.
++ *
++ * Each flavor of ignoring needs different logic to skip whitespaces
++ * while we have both sides to compare.
++ */
++ if (flags & XDF_IGNORE_WHITESPACE) {
++ goto skip_ws;
++ while (i1 < s1 && i2 < s2) {
++ if (l1[i1++] != l2[i2++])
++ return 0;
++ skip_ws:
++ while (i1 < s1 && XDL_ISSPACE(l1[i1]))
++ i1++;
++ while (i2 < s2 && XDL_ISSPACE(l2[i2]))
++ i2++;
++ }
++ } else if (flags & XDF_IGNORE_WHITESPACE_CHANGE) {
++ while (i1 < s1 && i2 < s2) {
++ if (XDL_ISSPACE(l1[i1]) && XDL_ISSPACE(l2[i2])) {
++ /* Skip matching spaces and try again */
++ while (i1 < s1 && XDL_ISSPACE(l1[i1]))
++ i1++;
++ while (i2 < s2 && XDL_ISSPACE(l2[i2]))
++ i2++;
++ continue;
++ }
++ if (l1[i1++] != l2[i2++])
++ return 0;
++ }
++ } else if (flags & XDF_IGNORE_WHITESPACE_AT_EOL) {
++ while (i1 < s1 && i2 < s2 && l1[i1] == l2[i2]) {
++ i1++;
++ i2++;
++ }
++ } else if (flags & XDF_IGNORE_CR_AT_EOL) {
++ /* Find the first difference and see how the line ends */
++ while (i1 < s1 && i2 < s2 && l1[i1] == l2[i2]) {
++ i1++;
++ i2++;
++ }
++ return (ends_with_optional_cr(l1, s1, i1) &&
++ ends_with_optional_cr(l2, s2, i2));
++ }
++
++ /*
++ * After running out of one side, the remaining side must have
++ * nothing but whitespace for the lines to match. Note that
++ * ignore-whitespace-at-eol case may break out of the loop
++ * while there still are characters remaining on both lines.
++ */
++ if (i1 < s1) {
++ while (i1 < s1 && XDL_ISSPACE(l1[i1]))
++ i1++;
++ if (s1 != i1)
++ return 0;
++ }
++ if (i2 < s2) {
++ while (i2 < s2 && XDL_ISSPACE(l2[i2]))
++ i2++;
++ return (s2 == i2);
++ }
++ return 1;
++ }
++
++ static unsigned long xdl_hash_record_with_whitespace(char const **data,
++ char const *top, long flags) {
++ unsigned long ha = 5381;
++ char const *ptr = *data;
++ int cr_at_eol_only = (flags & XDF_WHITESPACE_FLAGS) == XDF_IGNORE_CR_AT_EOL;
++
++ for (; ptr < top && *ptr != '\n'; ptr++) {
++ if (cr_at_eol_only) {
++ /* do not ignore CR at the end of an incomplete line */
++ if (*ptr == '\r' &&
++ (ptr + 1 < top && ptr[1] == '\n'))
++ continue;
++ }
++ else if (XDL_ISSPACE(*ptr)) {
++ const char *ptr2 = ptr;
++ int at_eol;
++ while (ptr + 1 < top && XDL_ISSPACE(ptr[1])
++ && ptr[1] != '\n')
++ ptr++;
++ at_eol = (top <= ptr + 1 || ptr[1] == '\n');
++ if (flags & XDF_IGNORE_WHITESPACE)
++ ; /* already handled */
++ else if (flags & XDF_IGNORE_WHITESPACE_CHANGE
++ && !at_eol) {
++ ha += (ha << 5);
++ ha ^= (unsigned long) ' ';
++ }
++ else if (flags & XDF_IGNORE_WHITESPACE_AT_EOL
++ && !at_eol) {
++ while (ptr2 != ptr + 1) {
++ ha += (ha << 5);
++ ha ^= (unsigned long) *ptr2;
++ ptr2++;
++ }
++ }
++ continue;
++ }
++ ha += (ha << 5);
++ ha ^= (unsigned long) *ptr;
++ }
++ *data = ptr < top ? ptr + 1: ptr;
++
++ return ha;
++ }
++
++ unsigned long xdl_hash_record(char const **data, char const *top, long flags) {
++ unsigned long ha = 5381;
++ char const *ptr = *data;
++
++ if (flags & XDF_WHITESPACE_FLAGS)
++ return xdl_hash_record_with_whitespace(data, top, flags);
++
++ for (; ptr < top && *ptr != '\n'; ptr++) {
++ ha += (ha << 5);
++ ha ^= (unsigned long) *ptr;
++ }
++ *data = ptr < top ? ptr + 1: ptr;
++
++ return ha;
++ }
++
++ unsigned int xdl_hashbits(unsigned int size) {
++ unsigned int val = 1, bits = 0;
++
++ for (; val < size && bits < CHAR_BIT * sizeof(unsigned int); val <<= 1, bits++);
++ return bits ? bits: 1;
++ }
++
++
++ int xdl_num_out(char *out, long val) {
++ char *ptr, *str = out;
++ char buf[32];
++
++ ptr = buf + sizeof(buf) - 1;
++ *ptr = '\0';
++ if (val < 0) {
++ *--ptr = '-';
++ val = -val;
++ }
++ for (; val && ptr > buf; val /= 10)
++ *--ptr = "0123456789"[val % 10];
++ if (*ptr)
++ for (; *ptr; ptr++, str++)
++ *str = *ptr;
++ else
++ *str++ = '0';
++ *str = '\0';
++
++ return str - out;
++ }
++
++ int xdl_emit_hunk_hdr(long s1, long c1, long s2, long c2,
++ const char *func, long funclen, xdemitcb_t *ecb) {
++ int nb = 0;
++ mmbuffer_t mb;
++ char buf[128];
++
++ memcpy(buf, "@@ -", 4);
++ nb += 4;
++
++ nb += xdl_num_out(buf + nb, c1 ? s1: s1 - 1);
++
++ if (c1 != 1) {
++ memcpy(buf + nb, ",", 1);
++ nb += 1;
++
++ nb += xdl_num_out(buf + nb, c1);
++ }
++
++ memcpy(buf + nb, " +", 2);
++ nb += 2;
++
++ nb += xdl_num_out(buf + nb, c2 ? s2: s2 - 1);
++
++ if (c2 != 1) {
++ memcpy(buf + nb, ",", 1);
++ nb += 1;
++
++ nb += xdl_num_out(buf + nb, c2);
++ }
++
++ memcpy(buf + nb, " @@", 3);
++ nb += 3;
++ if (func && funclen) {
++ buf[nb++] = ' ';
++ if (funclen > (long)sizeof(buf) - nb - 1)
++ funclen = sizeof(buf) - nb - 1;
++ memcpy(buf + nb, func, funclen);
++ nb += funclen;
++ }
++ buf[nb++] = '\n';
++
++ mb.ptr = buf;
++ mb.size = nb;
++ if (ecb->outf(ecb->priv, &mb, 1) < 0)
++ return -1;
++
++ return 0;
++ }
++
++ int xdl_fall_back_diff(xdfenv_t *diff_env, xpparam_t const *xpp,
++ int line1, int count1, int line2, int count2)
++ {
++ /*
++ * This probably does not work outside Git, since
++ * we have a very simple mmfile structure.
++ *
++ * Note: ideally, we would reuse the prepared environment, but
++ * the libxdiff interface does not (yet) allow for diffing only
++ * ranges of lines instead of the whole files.
++ */
++ mmfile_t subfile1, subfile2;
++ xdfenv_t env;
++
++ subfile1.ptr = (char *)diff_env->xdf1.recs[line1 - 1]->ptr;
++ subfile1.size = diff_env->xdf1.recs[line1 + count1 - 2]->ptr +
++ diff_env->xdf1.recs[line1 + count1 - 2]->size - subfile1.ptr;
++ subfile2.ptr = (char *)diff_env->xdf2.recs[line2 - 1]->ptr;
++ subfile2.size = diff_env->xdf2.recs[line2 + count2 - 2]->ptr +
++ diff_env->xdf2.recs[line2 + count2 - 2]->size - subfile2.ptr;
++ if (xdl_do_diff(&subfile1, &subfile2, xpp, &env) < 0)
++ return -1;
++
++ memcpy(diff_env->xdf1.rchg + line1 - 1, env.xdf1.rchg, count1);
++ memcpy(diff_env->xdf2.rchg + line2 - 1, env.xdf2.rchg, count2);
++
++ xdl_free_env(&env);
++
++ return 0;
++ }
+*** ../vim-8.1.0359/src/xdiff/xutils.h 1970-01-01 01:00:00.000000000 +0100
+--- src/xdiff/xutils.h 2018-09-10 17:39:20.324083781 +0200
+***************
+*** 0 ****
+--- 1,47 ----
++ /*
++ * LibXDiff by Davide Libenzi ( File Differential Library )
++ * Copyright (C) 2003 Davide Libenzi
++ *
++ * This library is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU Lesser General Public
++ * License as published by the Free Software Foundation; either
++ * version 2.1 of the License, or (at your option) any later version.
++ *
++ * This library is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
++ * Lesser General Public License for more details.
++ *
++ * You should have received a copy of the GNU Lesser General Public
++ * License along with this library; if not, see
++ * <http://www.gnu.org/licenses/>.
++ *
++ * Davide Libenzi <davidel@xmailserver.org>
++ *
++ */
++
++ #if !defined(XUTILS_H)
++ #define XUTILS_H
++
++
++
++ long xdl_bogosqrt(long n);
++ int xdl_emit_diffrec(char const *rec, long size, char const *pre, long psize,
++ xdemitcb_t *ecb);
++ int xdl_cha_init(chastore_t *cha, long isize, long icount);
++ void xdl_cha_free(chastore_t *cha);
++ void *xdl_cha_alloc(chastore_t *cha);
++ long xdl_guess_lines(mmfile_t *mf, long sample);
++ int xdl_blankline(const char *line, long size, long flags);
++ int xdl_recmatch(const char *l1, long s1, const char *l2, long s2, long flags);
++ unsigned long xdl_hash_record(char const **data, char const *top, long flags);
++ unsigned int xdl_hashbits(unsigned int size);
++ int xdl_num_out(char *out, long val);
++ int xdl_emit_hunk_hdr(long s1, long c1, long s2, long c2,
++ const char *func, long funclen, xdemitcb_t *ecb);
++ int xdl_fall_back_diff(xdfenv_t *diff_env, xpparam_t const *xpp,
++ int line1, int count1, int line2, int count2);
++
++
++
++ #endif /* #if !defined(XUTILS_H) */
+*** ../vim-8.1.0359/src/xdiff/README.txt 1970-01-01 01:00:00.000000000 +0100
+--- src/xdiff/README.txt 2018-09-10 17:39:20.324083781 +0200
+***************
+*** 0 ****
+--- 1,14 ----
++ The files in this directory come from the xdiff implementation in git.
++ You can find it here: https://github.com/git/git/tree/master/xdiff
++ The files were last updated 2018 September 10.
++
++ This is originally based on libxdiff, which can be found here:
++ http://www.xmailserver.org/xdiff-lib.html
++
++ The git version was used because it has been maintained and improved.
++ And since it's part of git it is expected to be reliable.
++
++ The code is distributed under the GNU LGPL license. It is included in the
++ COPYING file.
++
++ The first work for including xdiff in Vim was done by Christian Brabandt.
+*** ../vim-8.1.0359/src/version.c 2018-09-09 22:02:21.165859748 +0200
+--- src/version.c 2018-09-10 17:23:11.443756983 +0200
+***************
+*** 796,797 ****
+--- 796,799 ----
+ { /* Add new patch number below this line */
++ /**/
++ 360,
+ /**/
+
+--
+'Well, here's something to occupy you and keep your mind off things.'
+'It won't work, I have an exceptionally large mind.'
+ -- Douglas Adams, "The Hitchhiker's Guide to the Galaxy"
+
+ /// Bram Moolenaar -- Bram@Moolenaar.net -- http://www.Moolenaar.net \\\
+/// sponsor Vim, vote for features -- http://www.Vim.org/sponsor/ \\\
+\\\ an exciting new programming language -- http://www.Zimbu.org ///
+ \\\ help me help AIDS victims -- http://ICCF-Holland.org ///