merge patch from Daniel Hartwig to Show a error message if {,dist-}upgrade is used...

[apt.git] / apt-pkg / tagfile.h

diff --git a/apt-pkg/tagfile.h b/apt-pkg/tagfile.h
index a85d24b7ee6db4ad65506a80ca15fb673e466595..4718f5101171bf68f5e63e11830e0fb8e77b1f44 100644 (file)
--- a/apt-pkg/tagfile.h
+++ b/apt-pkg/tagfile.h
@@ -1,6 +1,6 @@
 // -*- mode: cpp; mode: fold -*-
 // Description                                                         /*{{{*/
-// $Id: tagfile.h,v 1.16 2001/03/11 07:22:19 jgg Exp $
+// $Id: tagfile.h,v 1.20 2003/05/19 17:13:57 doogie Exp $
 /* ######################################################################
 
    Fast scanner for RFC-822 type header information
@@ -20,40 +20,61 @@
 #ifndef PKGLIB_TAGFILE_H
 #define PKGLIB_TAGFILE_H
 
-#ifdef __GNUG__
-#pragma interface "apt-pkg/tagfile.h"
-#endif 
+#include <stdio.h>
+
+#include <string>
 
+#ifndef APT_8_CLEANER_HEADERS
 #include <apt-pkg/fileutl.h>
-#include <stdio.h>
-    
+#endif
+
+class FileFd;
+
 class pkgTagSection
 {
    const char *Section;
-   const char *Stop;
-   
    // We have a limit of 256 tags per section.
-   unsigned short Indexes[256];
-   unsigned short AlphaIndexes[0xff];
-   
+   unsigned int Indexes[256];
+   unsigned int AlphaIndexes[0x100];
    unsigned int TagCount;
-     
+   // dpointer placeholder (for later in case we need it)
+   void *d;
+
+   /* This very simple hash function for the last 8 letters gives
+      very good performance on the debian package files */
+   inline static unsigned long AlphaHash(const char *Text, const char *End = 0)
+   {
+      unsigned long Res = 0;
+      for (; Text != End && *Text != ':' && *Text != 0; Text++)
+        Res = ((unsigned long)(*Text) & 0xDF) ^ (Res << 1);
+      return Res & 0xFF;
+   }
+
+   protected:
+   const char *Stop;
+
    public:
    
    inline bool operator ==(const pkgTagSection &rhs) {return Section == rhs.Section;};
    inline bool operator !=(const pkgTagSection &rhs) {return Section != rhs.Section;};
    
    bool Find(const char *Tag,const char *&Start, const char *&End) const;
-   bool Find(const char *Tag,unsigned &Pos) const;
-   string FindS(const char *Tag) const;
+   bool Find(const char *Tag,unsigned int &Pos) const;
+   std::string FindS(const char *Tag) const;
    signed int FindI(const char *Tag,signed long Default = 0) const ;
+   unsigned long long FindULL(const char *Tag, unsigned long long const &Default = 0) const;
    bool FindFlag(const char *Tag,unsigned long &Flags,
                 unsigned long Flag) const;
+   bool static const FindFlag(unsigned long &Flags, unsigned long Flag,
+                               const char* Start, const char* Stop);
    bool Scan(const char *Start,unsigned long MaxLength);
    inline unsigned long size() const {return Stop - Section;};
    void Trim();
+   virtual void TrimRecord(bool BeforeRecord, const char* &End);
    
    inline unsigned int Count() const {return TagCount;};
+   bool Exists(const char* const Tag);
+ 
    inline void Get(const char *&Start,const char *&Stop,unsigned int I) const
                    {Start = Section + Indexes[I]; Stop = Section + Indexes[I+1];}
            
@@ -63,30 +84,26 @@ class pkgTagSection
       Stop = this->Stop;
    };
    
-   pkgTagSection() : Section(0), Stop(0) {};
+   pkgTagSection() : Section(0), TagCount(0), Stop(0) {};
+   virtual ~pkgTagSection() {};
 };
 
+class pkgTagFilePrivate;
 class pkgTagFile
 {
-   FileFd &Fd;
-   char *Buffer;
-   char *Start;
-   char *End;
-   unsigned long Left;
-   unsigned long iOffset;
-   unsigned long Size;
-   unsigned long TotalSize;
-   
+   pkgTagFilePrivate *d;
+
    bool Fill();
-   
+   bool Resize();
+
    public:
 
    bool Step(pkgTagSection &Section);
-   inline unsigned long Offset() {return iOffset;};
-   bool Jump(pkgTagSection &Tag,unsigned long Offset);
+   unsigned long Offset();
+   bool Jump(pkgTagSection &Tag,unsigned long long Offset);
 
-   pkgTagFile(FileFd *F,unsigned long Size = 32*1024);
-   ~pkgTagFile();
+   pkgTagFile(FileFd *F,unsigned long long Size = 32*1024);
+   virtual ~pkgTagFile();
 };
 
 /* This is the list of things to rewrite. The rewriter