Simplified time calculations

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

diff --git a/apt-pkg/tagfile.cc b/apt-pkg/tagfile.cc
index 68ab7856ea78adf297ef81a5b8aa2cb76f660420..53e1e5e8bfc29b469bbb55c87a8dcb3f6f66e756 100644 (file)
--- a/apt-pkg/tagfile.cc
+++ b/apt-pkg/tagfile.cc
@@ -1,6 +1,6 @@
 // -*- mode: cpp; mode: fold -*-
 // Description                                                         /*{{{*/
-// $Id: tagfile.cc,v 1.17 1998/12/07 07:26:22 jgg Exp $
+// $Id: tagfile.cc,v 1.24 1999/02/22 03:30:06 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>
@@ -45,7 +46,7 @@ bool pkgTagFile::Step(pkgTagSection &Tag)
         return false;
       
       if (Tag.Scan(Start,End - Start) == false)
-        return _error->Error("Unable to parse package file");
+        return _error->Error("Unable to parse package file %s (1)",Fd.Name().c_str());
    }   
    Start += Tag.size();
    iOffset += Tag.size();
@@ -61,17 +62,28 @@ bool pkgTagFile::Fill()
 {
    unsigned long EndSize = End - Start;
    
+   memmove(Buffer,Start,EndSize);
+   Start = Buffer;
+   End = Buffer + EndSize;
+   
    if (Left == 0)
    {
-      if (EndSize <= 1)
+      if (EndSize <= 3)
         return false;
+      if (Size - (End - Buffer) < 4)
+        return true;
+      
+      // Append a double new line if one does not exist
+      unsigned int LineCount = 0;
+      for (const char *E = End - 1; E - End < 6 && (*E == '\n' || *E == '\r'); E--)
+        if (*E == '\n')
+           LineCount++;
+      for (; LineCount < 2; LineCount++)
+        *End++ = '\n';
+      
       return true;
    }
    
-   memmove(Buffer,Start,EndSize);
-   Start = Buffer;
-   End = Buffer + EndSize;
-   
    // See if only a bit of the file is left
    if (Left < Size - (End - Buffer))
    {
@@ -104,11 +116,22 @@ 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;
 }
                                                                        /*}}}*/
@@ -122,10 +145,14 @@ bool pkgTagSection::Scan(const char *Start,unsigned long MaxLength)
    const char *End = Start + MaxLength;
    Stop = Section = Start;
    memset(AlphaIndexes,0,sizeof(AlphaIndexes));
+
+   if (Stop == 0)
+      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;
@@ -139,9 +166,11 @@ 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++);
@@ -150,7 +179,7 @@ bool pkgTagSection::Scan(const char *Start,unsigned long MaxLength)
       
       Stop++;
    }
-   
+
    return false;
 }
                                                                        /*}}}*/
@@ -186,9 +215,12 @@ 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;
    }
    
@@ -211,14 +243,52 @@ 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;
 }
                                                                        /*}}}*/
-