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-rw-r--r--apt-pkg/deb/deblistparser.cc214
-rw-r--r--apt-pkg/deb/deblistparser.h11
2 files changed, 211 insertions, 14 deletions
diff --git a/apt-pkg/deb/deblistparser.cc b/apt-pkg/deb/deblistparser.cc
index 97ee88183..4c37eb775 100644
--- a/apt-pkg/deb/deblistparser.cc
+++ b/apt-pkg/deb/deblistparser.cc
@@ -1,6 +1,6 @@
// -*- mode: cpp; mode: fold -*-
// Description /*{{{*/
-// $Id: deblistparser.cc,v 1.2 1998/07/04 22:32:17 jgg Exp $
+// $Id: deblistparser.cc,v 1.3 1998/07/05 05:34:00 jgg Exp $
/* ######################################################################
Package Cache Generator - Generator for the cache structure.
@@ -124,16 +124,6 @@ string debListParser::Version()
return FindTag("Version");
}
/*}}}*/
-// ListParser::NewPackage - Fill in the package structure /*{{{*/
-// ---------------------------------------------------------------------
-/* This is called when a new package structure is created. It must fill
- in the static package information. */
-bool debListParser::NewPackage(pkgCache::PkgIterator Pkg)
-{
- // Debian doesnt have anything, everything is condionally megered
- return true;
-}
- /*}}}*/
// ListParser::NewVersion - Fill in the version structure /*{{{*/
// ---------------------------------------------------------------------
/* */
@@ -166,6 +156,22 @@ bool debListParser::NewVersion(pkgCache::VerIterator Ver)
_count(PrioList),Ver->Priority) == false)
return _error->Error("Malformed Priority line");
}
+
+ if (ParseDepends(Ver,"Depends",pkgCache::Depends) == false)
+ return false;
+ if (ParseDepends(Ver,"PreDepends",pkgCache::PreDepends) == false)
+ return false;
+ if (ParseDepends(Ver,"Suggests",pkgCache::Suggests) == false)
+ return false;
+ if (ParseDepends(Ver,"Recommends",pkgCache::Recommends) == false)
+ return false;
+ if (ParseDepends(Ver,"Conflicts",pkgCache::Conflicts) == false)
+ return false;
+ if (ParseDepends(Ver,"Replaces",pkgCache::Depends) == false)
+ return false;
+
+ if (ParseProvides(Ver) == false)
+ return false;
return true;
}
@@ -189,7 +195,7 @@ bool debListParser::UsePackage(pkgCache::PkgIterator Pkg,
return true;
}
/*}}}*/
-// ListParser::ParseStatus - Parse the status feild /*{{{*/
+// ListParser::ParseStatus - Parse the status field /*{{{*/
// ---------------------------------------------------------------------
/* Status lines are of the form,
Status: want flag status
@@ -279,6 +285,187 @@ bool debListParser::ParseStatus(pkgCache::PkgIterator Pkg,
return true;
}
/*}}}*/
+// ListParser::ParseDepends - Parse a dependency element /*{{{*/
+// ---------------------------------------------------------------------
+/* This parses the dependency elements out of a standard string in place,
+ bit by bit. */
+const char *debListParser::ParseDepends(const char *Start,const char *Stop,
+ string &Package,string &Ver,
+ unsigned int &Op)
+{
+ // Strip off leading space
+ for (;Start != Stop && isspace(*Start) != 0; Start++);
+
+ // Parse off the package name
+ const char *I = Start;
+ for (;I != Stop && isspace(*I) == 0 && *I != '(' && *I != ')' &&
+ *I != ',' && *I != '|'; I++);
+
+ // Malformed, no '('
+ if (I != Stop && *I == ')')
+ return 0;
+
+ if (I == Start)
+ return 0;
+
+ // Stash the package name
+ Package.assign(Start,I - Start);
+
+ // Skip white space to the '('
+ for (;I != Stop && isspace(*I) != 0 ; I++);
+
+ // Parse a version
+ if (I != Stop && *I == '(')
+ {
+ // Skip the '('
+ for (I++; I != Stop && isspace(*I) != 0 ; I++);
+ if (I + 3 >= Stop)
+ return 0;
+
+ // Determine the operator
+ switch (*I)
+ {
+ case '<':
+ I++;
+ if (*I == '=')
+ {
+ I++;
+ Op = pkgCache::LessEq;
+ break;
+ }
+
+ if (*I == '<')
+ {
+ I++;
+ Op = pkgCache::Less;
+ break;
+ }
+
+ // < is the same as <= and << is really Cs < for some reason
+ Op = pkgCache::LessEq;
+ break;
+
+ case '>':
+ I++;
+ if (*I == '=')
+ {
+ I++;
+ Op = pkgCache::GreaterEq;
+ break;
+ }
+
+ if (*I == '>')
+ {
+ I++;
+ Op = pkgCache::Greater;
+ break;
+ }
+
+ // > is the same as >= and >> is really Cs > for some reason
+ Op = pkgCache::GreaterEq;
+ break;
+
+ case '=':
+ Op = pkgCache::Equals;
+ I++;
+ break;
+
+ // HACK around bad package definitions
+ default:
+ Op = pkgCache::Equals;
+ break;
+ }
+
+ // Skip whitespace
+ for (;I != Stop && isspace(*I) != 0; I++);
+ Start = I;
+ for (;I != Stop && *I != ')'; I++);
+ if (I == Stop || Start == I)
+ return 0;
+
+ Ver = string(Start,I-Start);
+ I++;
+ }
+ else
+ {
+ Ver = string();
+ Op = pkgCache::NoOp;
+ }
+
+ // Skip whitespace
+ for (;I != Stop && isspace(*I) != 0; I++);
+ if (I != Stop && *I == '|')
+ Op |= pkgCache::Or;
+
+ if (I == Stop || *I == ',' || *I == '|')
+ {
+ if (I != Stop)
+ for (I++; I != Stop && isspace(*I) != 0; I++);
+ return I;
+ }
+
+ return 0;
+}
+ /*}}}*/
+// ListParser::ParseDepends - Parse a dependency list /*{{{*/
+// ---------------------------------------------------------------------
+/* This is the higher level depends parser. It takes a tag and generates
+ a complete depends tree for the given version. */
+bool debListParser::ParseDepends(pkgCache::VerIterator Ver,
+ const char *Tag,unsigned int Type)
+{
+ const char *Start;
+ const char *Stop;
+ if (Section.Find(Tag,Start,Stop) == false)
+ return true;
+
+ string Package;
+ string Version;
+ unsigned int Op;
+
+ while ((Start = ParseDepends(Start,Stop,Package,Version,Op)) != Stop)
+ {
+ if (Start == 0)
+ return _error->Error("Problem parsing dependency %s",Tag);
+
+ if (NewDepends(Ver,Package,Version,Op,Type) == false)
+ return false;
+ }
+ return true;
+}
+ /*}}}*/
+// ListParser::ParseProvides - Parse the provides list /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+bool debListParser::ParseProvides(pkgCache::VerIterator Ver)
+{
+ const char *Start;
+ const char *Stop;
+ if (Section.Find("Provides",Start,Stop) == false)
+ return true;
+
+ string Package;
+ string Version;
+ unsigned int Op;
+
+ while (1)
+ {
+ Start = ParseDepends(Start,Stop,Package,Version,Op);
+ if (Start == 0)
+ return _error->Error("Problem parsing Provides line");
+ if (Op != pkgCache::NoOp)
+ return _error->Error("Malformed provides line");
+
+ if (NewProvides(Ver,Package,Version) == false)
+ return false;
+
+ if (Start == Stop)
+ break;
+ }
+
+ return true;
+}
+ /*}}}*/
// ListParser::GrabWord - Matches a word and returns /*{{{*/
// ---------------------------------------------------------------------
/* Looks for a word in a list of words - for ParseStatus */
@@ -301,6 +488,7 @@ bool debListParser::GrabWord(string Word,WordList *List,int Count,
/* This has to be carefull to only process the correct architecture */
bool debListParser::Step()
{
+ iOffset = Tags.Offset();
while (Tags.Step(Section) == true)
{
/* See if this is the correct Architecture, if it isnt then we
@@ -317,6 +505,8 @@ bool debListParser::Step()
if (strncmp(Start,"all",Stop - Start) == 0 &&
3 == (unsigned)(Stop - Start))
return true;
+
+ iOffset = Tags.Offset();
}
return false;
}
diff --git a/apt-pkg/deb/deblistparser.h b/apt-pkg/deb/deblistparser.h
index a458eb60c..c7a97c16a 100644
--- a/apt-pkg/deb/deblistparser.h
+++ b/apt-pkg/deb/deblistparser.h
@@ -1,6 +1,6 @@
// -*- mode: cpp; mode: fold -*-
// Description /*{{{*/
-// $Id: deblistparser.h,v 1.2 1998/07/04 22:32:18 jgg Exp $
+// $Id: deblistparser.h,v 1.3 1998/07/05 05:34:01 jgg Exp $
/* ######################################################################
Debian Package List Parser - This implements the abstract parser
@@ -19,6 +19,7 @@ class debListParser : public pkgCacheGenerator::ListParser
{
pkgTagFile Tags;
pkgTagSection Section;
+ unsigned long iOffset;
// Parser Helper
struct WordList
@@ -32,6 +33,11 @@ class debListParser : public pkgCacheGenerator::ListParser
unsigned long UniqFindTagWrite(const char *Tag);
bool HandleFlag(const char *Tag,unsigned long &Flags,unsigned long Flag);
bool ParseStatus(pkgCache::PkgIterator Pkg,pkgCache::VerIterator Ver);
+ const char *ParseDepends(const char *Start,const char *Stop,
+ string &Package,string &Ver,unsigned int &Op);
+ bool ParseDepends(pkgCache::VerIterator Ver,const char *Tag,
+ unsigned int Type);
+ bool ParseProvides(pkgCache::VerIterator Ver);
bool GrabWord(string Word,WordList *List,int Count,unsigned char &Out);
public:
@@ -40,9 +46,10 @@ class debListParser : public pkgCacheGenerator::ListParser
virtual string Package();
virtual string Version();
virtual bool NewVersion(pkgCache::VerIterator Ver);
- virtual bool NewPackage(pkgCache::PkgIterator Pkg);
virtual bool UsePackage(pkgCache::PkgIterator Pkg,
pkgCache::VerIterator Ver);
+ virtual unsigned long Offset() {return iOffset;};
+ virtual unsigned long Size() {return Section.size();};
virtual bool Step();