Package Record parser

Author: jgg
Date: 1998-08-09 00:51:33 GMT
Package Record parser

apt-pkg/deb/deblistparser.cc

@@ -1,6 +1,6 @@
 // -*- mode: cpp; mode: fold -*-
 // Description								/*{{{*/
-// $Id: deblistparser.cc,v 1.9 1998/07/26 04:49:37 jgg Exp $
+// $Id: deblistparser.cc,v 1.10 1998/08/09 00:51:35 jgg Exp $
 /* ######################################################################
    
    Package Cache Generator - Generator for the cache structure.
@@ -167,7 +167,7 @@ bool debListParser::NewVersion(pkgCache::VerIterator Ver)
       return false;
    if (ParseDepends(Ver,"Conflicts",pkgCache::Dep::Conflicts) == false)
       return false;
-   if (ParseDepends(Ver,"Replaces",pkgCache::Dep::Depends) == false)
+   if (ParseDepends(Ver,"Replaces",pkgCache::Dep::Replaces) == false)
       return false;
 
    if (ParseProvides(Ver) == false)

apt-pkg/deb/debrecords.cc

@@ -0,0 +1,32 @@
+// -*- mode: cpp; mode: fold -*-
+// Description								/*{{{*/
+// $Id: debrecords.cc,v 1.1 1998/08/09 00:51:36 jgg Exp $
+/* ######################################################################
+   
+   Debian Package Records - Parser for debian package records
+     
+   ##################################################################### */
+									/*}}}*/
+// Include Files							/*{{{*/
+#ifdef __GNUG__
+#pragma implementation "apt-pkg/debrecords.h"
+#endif
+#include <apt-pkg/debrecords.h>
+#include <apt-pkg/error.h>
+									/*}}}*/
+
+// RecordParser::debRecordParser - Constructor				/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+debRecordParser::debRecordParser(FileFd &File) : Tags(File,4*1024)
+{
+}
+									/*}}}*/
+// RecordParser::Jump - Jump to a specific record			/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+bool debRecordParser::Jump(pkgCache::VerFileIterator &Ver)
+{
+   return Tags.Jump(Section,Ver->Offset);
+}
+									/*}}}*/

apt-pkg/deb/debrecords.h

@@ -0,0 +1,38 @@
+// -*- mode: cpp; mode: fold -*-
+// Description								/*{{{*/
+// $Id: debrecords.h,v 1.1 1998/08/09 00:51:36 jgg Exp $
+/* ######################################################################
+   
+   Debian Package Records - Parser for debian package records
+   
+   This provides display-type parsing for the Packages file. This is 
+   different than the the list parser which provides cache generation
+   services. There should be no overlap between these two.
+   
+   ##################################################################### */
+									/*}}}*/
+// Header section: pkglib
+#ifndef PKGLIB_DEBRECORDS_H
+#define PKGLIB_DEBRECORDS_H
+
+#ifdef __GNUG__
+#pragma interface "apt-pkg/debrecords.h"
+#endif 
+
+#include <apt-pkg/pkgrecords.h>
+#include <apt-pkg/tagfile.h>
+
+class debRecordParser : public pkgRecords::Parser
+{
+   pkgTagFile Tags;
+   pkgTagSection Section;
+   
+   public:
+   
+   virtual bool Jump(pkgCache::VerFileIterator &Ver);
+   
+   debRecordParser(FileFd &File);
+};
+
+
+#endif

apt-pkg/makefile

@@ -20,16 +20,16 @@ SOURCE = contrib/mmap.cc contrib/error.cc contrib/strutl.cc \
 # Source code for the main library
 SOURCE+= pkgcache.cc version.cc fileutl.cc pkgcachegen.cc depcache.cc \
          orderlist.cc tagfile.cc sourcelist.cc packagemanager.cc \
-	 algorithms.cc init.cc templates.cc
+	 pkgrecords.cc algorithms.cc init.cc templates.cc
 	 
 # Source code for the debian specific components	 
-SOURCE+= deb/deblistparser.cc
+SOURCE+= deb/deblistparser.cc deb/debrecords.cc
 
 # Public apt-pkg header files
 HEADERS = algorithms.h depcache.h mmap.h pkgcachegen.h cacheiterators.h \
           error.h orderlist.h sourcelist.h configuration.h fileutl.h \
           packagemanager.h tagfile.h deblistparser.h init.h pkgcache.h \
-          version.h progress.h
+          version.h progress.h pkgrecords.h debrecords.h
 HEADERS := $(addprefix apt-pkg/,$(HEADERS))
 
 # Private header files

apt-pkg/pkgcachegen.h

@@ -1,6 +1,6 @@
 // -*- mode: cpp; mode: fold -*-
 // Description								/*{{{*/
-// $Id: pkgcachegen.h,v 1.9 1998/07/26 04:49:32 jgg Exp $
+// $Id: pkgcachegen.h,v 1.10 1998/08/09 00:51:34 jgg Exp $
 /* ######################################################################
    
    Package Cache Generator - Generator for the cache structure.
@@ -34,6 +34,7 @@ class pkgCacheGenerator
    public:
    
    class ListParser;
+   friend ListParser;
    
    protected:
    
@@ -51,41 +52,7 @@ class pkgCacheGenerator
    unsigned long WriteUniqString(const char *S,unsigned int Size);
    inline unsigned long WriteUniqString(string S) {return WriteUniqString(S);};
    
-   public:
-   
-   // This is the abstract package list parser class.
-   class ListParser
-   {
-      pkgCacheGenerator *Owner;
-      friend pkgCacheGenerator;
-      
-      protected:
-      
-      inline unsigned long WriteUniqString(string S) {return Owner->WriteUniqString(S);};
-      inline unsigned long WriteUniqString(const char *S,unsigned int Size) {return Owner->WriteUniqString(S,Size);};
-      inline unsigned long WriteString(string S) {return Owner->Map.WriteString(S);};
-      inline unsigned long WriteString(const char *S,unsigned int Size) {return Owner->Map.WriteString(S,Size);};
-      bool NewDepends(pkgCache::VerIterator Ver,string Package,
-			 string Version,unsigned int Op,
-			 unsigned int Type);
-      bool NewProvides(pkgCache::VerIterator Ver,string Package,string Version);
-      
-      public:
-      
-      // These all operate against the current section
-      virtual string Package() = 0;
-      virtual string Version() = 0;
-      virtual bool NewVersion(pkgCache::VerIterator Ver) = 0;
-      virtual bool UsePackage(pkgCache::PkgIterator Pkg,
-			      pkgCache::VerIterator Ver) = 0;
-      virtual unsigned long Offset() = 0;
-      virtual unsigned long Size() = 0;
-      
-      virtual bool Step() = 0;
-      
-      virtual ~ListParser() {};
-   };
-   friend ListParser;
+   public:   
 
    bool SelectFile(string File,unsigned long Flags = 0);
    bool MergeList(ListParser &List);
@@ -99,4 +66,37 @@ bool pkgSrcCacheCheck(pkgSourceList &List);
 bool pkgPkgCacheCheck(string CacheFile);
 bool pkgMakeStatusCache(pkgSourceList &List,OpProgress &Progress);
 
+// This is the abstract package list parser class.
+class pkgCacheGenerator::ListParser
+{
+   pkgCacheGenerator *Owner;
+   friend pkgCacheGenerator;
+   
+   protected:
+   
+   inline unsigned long WriteUniqString(string S) {return Owner->WriteUniqString(S);};
+   inline unsigned long WriteUniqString(const char *S,unsigned int Size) {return Owner->WriteUniqString(S,Size);};
+   inline unsigned long WriteString(string S) {return Owner->Map.WriteString(S);};
+   inline unsigned long WriteString(const char *S,unsigned int Size) {return Owner->Map.WriteString(S,Size);};
+   bool NewDepends(pkgCache::VerIterator Ver,string Package,
+		   string Version,unsigned int Op,
+		   unsigned int Type);
+   bool NewProvides(pkgCache::VerIterator Ver,string Package,string Version);
+   
+   public:
+   
+   // These all operate against the current section
+   virtual string Package() = 0;
+   virtual string Version() = 0;
+   virtual bool NewVersion(pkgCache::VerIterator Ver) = 0;
+   virtual bool UsePackage(pkgCache::PkgIterator Pkg,
+			   pkgCache::VerIterator Ver) = 0;
+   virtual unsigned long Offset() = 0;
+   virtual unsigned long Size() = 0;
+   
+   virtual bool Step() = 0;
+   
+   virtual ~ListParser() {};
+};
+
 #endif

apt-pkg/pkgrecords.cc

@@ -0,0 +1,65 @@
+// -*- mode: cpp; mode: fold -*-
+// Description								/*{{{*/
+// $Id: pkgrecords.cc,v 1.1 1998/08/09 00:51:35 jgg Exp $
+/* ######################################################################
+   
+   Package Records - Allows access to complete package description records
+                     directly from the file.
+     
+   ##################################################################### */
+									/*}}}*/
+// Include Files							/*{{{*/
+#ifdef __GNUG__
+#pragma implementation "apt-pkg/pkgrecords.h"
+#endif
+#include <apt-pkg/pkgrecords.h>
+#include <apt-pkg/debrecords.h>
+#include <apt-pkg/error.h>
+									/*}}}*/
+
+// Records::pkgRecords - Constructor					/*{{{*/
+// ---------------------------------------------------------------------
+/* This will create the necessary structures to access the status files */
+pkgRecords::pkgRecords(pkgCache &Cache) : Cache(Cache), Files(0)
+{
+   Files = new PkgFile[Cache.HeaderP->PackageFileCount];   
+   for (pkgCache::PkgFileIterator I = Cache.FileBegin(); 
+	I.end() == false; I++)
+   {
+      Files[I->ID].File = new FileFd(I.FileName(),FileFd::ReadOnly);
+      if (_error->PendingError() == true)
+	 return;
+      Files[I->ID].Parse = new debRecordParser(*Files[I->ID].File);
+      if (_error->PendingError() == true)
+	 return;
+   }   
+}
+									/*}}}*/
+// Records::~pkgRecords - Destructor					/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+pkgRecords::~pkgRecords()
+{
+   delete [] Files;
+}
+									/*}}}*/
+// Records::Lookup - Get a parser for the package version file		/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+pkgRecords::Parser &pkgRecords::Lookup(pkgCache::VerFileIterator &Ver)
+{   
+   PkgFile &File = Files[Ver.File()->ID];
+   File.Parse->Jump(Ver);
+
+   return *File.Parse;
+}
+									/*}}}*/
+// Records::Pkgfile::~PkgFile - Destructor				/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+pkgRecords::PkgFile::~PkgFile()
+{
+   delete Parse;
+   delete File;
+}
+									/*}}}*/

apt-pkg/pkgrecords.h

@@ -0,0 +1,67 @@
+// -*- mode: cpp; mode: fold -*-
+// Description								/*{{{*/
+// $Id: pkgrecords.h,v 1.1 1998/08/09 00:51:35 jgg Exp $
+/* ######################################################################
+   
+   Package Records - Allows access to complete package description records
+                     directly from the file.
+   
+   The package record system abstracts the actual parsing of the 
+   package files. This is different than the generators parser in that
+   it is used to access information not generate information. No 
+   information touched by the generator should be parable from here as
+   it can always be retreived directly from the cache.
+   
+   ##################################################################### */
+									/*}}}*/
+// Header section: pkglib
+#ifndef PKGLIB_PKGRECORDS_H
+#define PKGLIB_PKGRECORDS_H
+
+#ifdef __GNUG__
+#pragma interface "apt-pkg/pkgrecords.h"
+#endif 
+
+#include <apt-pkg/pkgcache.h>
+#include <apt-pkg/fileutl.h>
+
+class pkgRecords
+{
+   public:
+   class Parser;
+   
+   private:
+   
+   pkgCache &Cache;
+   
+   // List of package files
+   struct PkgFile
+   {
+      FileFd *File;
+      Parser *Parse;
+
+      PkgFile() : File(0), Parse(0) {};
+      ~PkgFile();
+   };
+   PkgFile *Files;
+   
+   public:
+
+   // Lookup function
+   Parser &Lookup(pkgCache::VerFileIterator &Ver);
+      
+   // Construct destruct
+   pkgRecords(pkgCache &Cache);
+   ~pkgRecords();
+};
+
+class pkgRecords::Parser
+{
+   public:
+   
+   virtual bool Jump(pkgCache::VerFileIterator &Ver) = 0;
+   
+   virtual ~Parser() {};
+};
+
+#endif