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authorDavid Kalnischkies <kalnischkies@gmail.com>2010-05-30 23:12:41 +0200
committerDavid Kalnischkies <kalnischkies@gmail.com>2010-05-30 23:12:41 +0200
commitffee1c2bed4accfe25b2ac9e9f0ab9a0ebae9b5b (patch)
tree300268d8dc2bec4b4537dfa7f106395290be44e9 /apt-pkg/packageset.cc
parente1dbde8dd006ca0ed6b7a6c383af7bbc60014912 (diff)
move regex magic from apt-get to new FromRegEx method
Diffstat (limited to 'apt-pkg/packageset.cc')
-rw-r--r--apt-pkg/packageset.cc62
1 files changed, 62 insertions, 0 deletions
diff --git a/apt-pkg/packageset.cc b/apt-pkg/packageset.cc
new file mode 100644
index 000000000..f452bc052
--- /dev/null
+++ b/apt-pkg/packageset.cc
@@ -0,0 +1,62 @@
+// -*- mode: cpp; mode: fold -*-
+// Description /*{{{*/
+/* ######################################################################
+
+ Simple wrapper around a std::set to provide a similar interface to
+ a set of packages as to the complete set of all packages in the
+ pkgCache.
+
+ ##################################################################### */
+ /*}}}*/
+// Include Files /*{{{*/
+#include <apt-pkg/error.h>
+#include <apt-pkg/packageset.h>
+#include <apt-pkg/strutl.h>
+
+#include <apti18n.h>
+
+#include <regex.h>
+ /*}}}*/
+namespace APT {
+// FromRegEx - Return all packages in the cache matching a pattern /*{{{*/
+PackageSet PackageSet::FromRegEx(pkgCache &Cache, const char * const pattern, std::ostream &out) {
+ PackageSet pkgset;
+
+ const char * I;
+ for (I = pattern; *I != 0; I++)
+ if (*I == '.' || *I == '?' || *I == '+' || *I == '*' ||
+ *I == '|' || *I == '[' || *I == '^' || *I == '$')
+ break;
+ if (*I == 0)
+ return pkgset;
+
+ regex_t Pattern;
+ int Res;
+ if ((Res = regcomp(&Pattern, pattern , REG_EXTENDED | REG_ICASE | REG_NOSUB)) != 0) {
+ char Error[300];
+ regerror(Res, &Pattern, Error, sizeof(Error));
+ _error->Error(_("Regex compilation error - %s"), Error);
+ return pkgset;
+ }
+
+ for (pkgCache::GrpIterator Grp = Cache.GrpBegin(); Grp.end() == false; ++Grp)
+ {
+ if (regexec(&Pattern, Grp.Name(), 0, 0, 0) != 0)
+ continue;
+ pkgCache::PkgIterator Pkg = Grp.FindPkg("native");
+ if (unlikely(Pkg.end() == true))
+ // FIXME: Fallback to different architectures here?
+ continue;
+
+ ioprintf(out, _("Note, selecting %s for regex '%s'\n"),
+ Pkg.Name(), pattern);
+
+ pkgset.insert(Pkg);
+ }
+
+ regfree(&Pattern);
+
+ return pkgset;
+}
+ /*}}}*/
+}