X-Git-Url: https://git.saurik.com/apt.git/blobdiff_plain/c7b5ce1cf17ebbf845b58ce33956251176d471b2..a3eaf9544039a9adfef159e8185f376f19b15c68:/apt-pkg/tagfile.cc?ds=inline

diff --git a/apt-pkg/tagfile.cc b/apt-pkg/tagfile.cc
index 7f2bf6b1d..97e5c244a 100644
--- a/apt-pkg/tagfile.cc
+++ b/apt-pkg/tagfile.cc
@@ -1,6 +1,6 @@
 // -*- mode: cpp; mode: fold -*-
 // Description								/*{{{*/
-// $Id: tagfile.cc,v 1.18 1998/12/08 05:24:41 jgg Exp $
+// $Id: tagfile.cc,v 1.25 1999/07/03 06:45:40 jgg Exp $
 /* ######################################################################
 
    Fast scanner for RFC-822 type header information
@@ -17,6 +17,7 @@
 
 #include <apt-pkg/tagfile.h>
 #include <apt-pkg/error.h>
+#include <apt-pkg/strutl.h>
 
 #include <string>
 #include <stdio.h>
@@ -34,6 +35,14 @@ pkgTagFile::pkgTagFile(FileFd &Fd,unsigned long Size) : Fd(Fd), Size(Size)
    Fill();
 }
 									/*}}}*/
+// pkgTagFile::~pkgTagFile - Destructor					/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+pkgTagFile::~pkgTagFile()
+{
+   delete [] Buffer;
+}
+									/*}}}*/
 // TagFile::Step - Advance to the next section				/*{{{*/
 // ---------------------------------------------------------------------
 /* If the Section Scanner fails we refill the buffer and try again. */
@@ -45,7 +54,7 @@ bool pkgTagFile::Step(pkgTagSection &Tag)
 	 return false;
       
       if (Tag.Scan(Start,End - Start) == false)
-	 return _error->Error("Unable to parse package file %s",Fd.Name().c_str());
+	 return _error->Error("Unable to parse package file %s (1)",Fd.Name().c_str());
    }   
    Start += Tag.size();
    iOffset += Tag.size();
@@ -115,11 +124,22 @@ bool pkgTagFile::Jump(pkgTagSection &Tag,unsigned long Offset)
       return false;
    End = Start = Buffer;
    
+   if (Fill() == false)
+      return false;
+
+   if (Tag.Scan(Start,End - Start) == true)
+      return true;
+   
+   // This appends a double new line (for the real eof handling)
    if (Fill() == false)
       return false;
    
    if (Tag.Scan(Start,End - Start) == false)
-      return _error->Error("Unable to parse package file");
+   {
+      cout << string(Start,End) << endl;
+      return _error->Error("Unable to parse package file %s (2)",Fd.Name().c_str());
+   }
+   
    return true;
 }
 									/*}}}*/
@@ -138,8 +158,9 @@ bool pkgTagSection::Scan(const char *Start,unsigned long MaxLength)
       return false;
    
    TagCount = 0;
-   while (TagCount < sizeof(Indexes)/sizeof(Indexes[0]))
+   while (TagCount < sizeof(Indexes)/sizeof(Indexes[0]) && Stop < End)
    {
+      // Start a new index and add it to the hash
       if (isspace(Stop[0]) == 0)
       {
 	 Indexes[TagCount++] = Stop - Section;
@@ -153,9 +174,11 @@ bool pkgTagSection::Scan(const char *Start,unsigned long MaxLength)
       
       if (Stop == 0)
 	 return false;
-      for (; Stop[1] == '\r' && Stop < End; Stop++);
+      
+      for (; Stop[1] == '\r' && Stop+1 < End; Stop++);
 
-      if (Stop[1] == '\n')
+      // Double newline marks the end of the record
+      if (Stop+1 < End && Stop[1] == '\n')
       {
 	 Indexes[TagCount] = Stop - Section;
 	 for (; (Stop[0] == '\n' || Stop[0] == '\r') && Stop < End; Stop++);
@@ -164,7 +187,7 @@ bool pkgTagSection::Scan(const char *Start,unsigned long MaxLength)
       
       Stop++;
    }
-   
+
    return false;
 }
 									/*}}}*/
@@ -200,9 +223,12 @@ bool pkgTagSection::Find(const char *Tag,const char *&Start,
       // Strip off the gunk from the start end
       Start = C;
       End = Section + Indexes[I+1];
+      if (Start >= End)
+	 return _error->Error("Internal parsing error");
+      
       for (; (isspace(*Start) != 0 || *Start == ':') && Start < End; Start++);
       for (; isspace(End[-1]) != 0 && End > Start; End--);
-
+      
       return true;
    }
    
@@ -225,14 +251,52 @@ string pkgTagSection::FindS(const char *Tag)
 // TagSection::FindI - Find an integer					/*{{{*/
 // ---------------------------------------------------------------------
 /* */
-unsigned int pkgTagSection::FindI(const char *Tag)
+signed int pkgTagSection::FindI(const char *Tag,signed long Default)
 {
    const char *Start;
-   const char *End;
-   if (Find(Tag,Start,End) == false)
-      return 0;
+   const char *Stop;
+   if (Find(Tag,Start,Stop) == false)
+      return Default;
+
+   // Copy it into a temp buffer so we can use strtol
+   char S[300];
+   if ((unsigned)(Stop - Start) >= sizeof(S))
+      return Default;
+   strncpy(S,Start,Stop-Start);
+   S[Stop - Start] = 0;
+   
+   char *End;
+   signed long Result = strtol(S,&End,10);
+   if (S == End)
+      return Default;
+   return Result;
+}
+									/*}}}*/
+// TagSection::FindFlag - Locate a yes/no type flag			/*{{{*/
+// ---------------------------------------------------------------------
+/* The bits marked in Flag are masked on/off in Flags */
+bool pkgTagSection::FindFlag(const char *Tag,unsigned long &Flags,
+			     unsigned long Flag)
+{
+   const char *Start;
+   const char *Stop;
+   if (Find(Tag,Start,Stop) == false)
+      return true;
    
-   return atoi(string(Start,End).c_str());
+   switch (StringToBool(string(Start,Stop)))
+   {     
+      case 0:
+      Flags &= ~Flag;
+      return true;
+
+      case 1:
+      Flags |= Flag;
+      return true;
+
+      default:
+      _error->Warning("Unknown flag value");
+      return true;
+   }
+   return true;
 }
 									/*}}}*/
-