Multiple different versions support

Author: jgg
Date: 1999-05-23 22:55:54 GMT
Multiple different versions support

2 files changed, 38 insertions, 2 deletions

diff --git a/apt-pkg/deb/deblistparser.cc b/apt-pkg/deb/deblistparser.cc
index 9adc60044..273b7fd42 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 1.18 1999/04/12 19:16:11 jgg Exp $
+// $Id: deblistparser.cc,v 1.19 1999/05/23 22:55:54 jgg Exp $
 /* ######################################################################
    
    Package Cache Generator - Generator for the cache structure.
@@ -14,6 +14,7 @@
 #include <apt-pkg/error.h>
 #include <apt-pkg/configuration.h>
 #include <apt-pkg/strutl.h>
+#include <apt-pkg/crc-16.h>
 
 #include <system.h>
 									/*}}}*/
@@ -130,6 +131,40 @@ bool debListParser::UsePackage(pkgCache::PkgIterator Pkg,
    return true;
 }
 									/*}}}*/
+// ListParser::VersionHash - Compute a unique hash for this version	/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+unsigned short debListParser::VersionHash()
+{
+   const char *Sections[] ={"Installed-Size",
+                            "Depends",
+                            "Pre-Depends",
+                            "Suggests",
+                            "Recommends",
+                            "Conflicts",
+                            "Replaces",0};
+   unsigned long Result = INIT_FCS;
+   char S[300];
+   for (const char **I = Sections; *I != 0; I++)
+   {
+      const char *Start;
+      const char *End;
+      if (Section.Find(*I,Start,End) == false || End - Start >= (signed)sizeof(S))
+	 continue;
+      
+      /* Strip out any spaces from the text, this undoes dpkgs reformatting
+         of certain fields */
+      char *I = S;
+      for (; Start != End; Start++)
+	 if (isspace(*Start) == 0)
+	    *I++ = *Start;
+      
+      Result = AddCRC16(Result,S,I - S);
+   }
+   
+   return Result;
+}
+									/*}}}*/
 // ListParser::ParseStatus - Parse the status field			/*{{{*/
 // ---------------------------------------------------------------------
 /* Status lines are of the form,
diff --git a/apt-pkg/deb/deblistparser.h b/apt-pkg/deb/deblistparser.h
index 6888c1a5e..3c8ea5b0a 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 1.6 1998/12/14 02:23:47 jgg Exp $
+// $Id: deblistparser.h,v 1.7 1999/05/23 22:55:55 jgg Exp $
 /* ######################################################################
    
    Debian Package List Parser - This implements the abstract parser 
@@ -43,6 +43,7 @@ class debListParser : public pkgCacheGenerator::ListParser
    virtual string Package();
    virtual string Version();
    virtual bool NewVersion(pkgCache::VerIterator Ver);
+   virtual unsigned short VersionHash();
    virtual bool UsePackage(pkgCache::PkgIterator Pkg,
 			   pkgCache::VerIterator Ver);
    virtual unsigned long Offset() {return iOffset;};