X-Git-Url: https://git.saurik.com/apt.git/blobdiff_plain/39699139701d03d62527223dcf230cae66171238..8d3489abd90a64715b92976a7c60b42a386a4c5c:/apt-pkg/tagfile.cc

diff --git a/apt-pkg/tagfile.cc b/apt-pkg/tagfile.cc
index 040562fff..96a681bec 100644
--- a/apt-pkg/tagfile.cc
+++ b/apt-pkg/tagfile.cc
@@ -11,10 +11,6 @@
    ##################################################################### */
 									/*}}}*/
 // Include Files							/*{{{*/
-#ifdef __GNUG__
-#pragma implementation "apt-pkg/tagfile.h"
-#endif
-
 #include <apt-pkg/tagfile.h>
 #include <apt-pkg/error.h>
 #include <apt-pkg/strutl.h>
@@ -59,19 +55,52 @@ pkgTagFile::~pkgTagFile()
    delete [] Buffer;
 }
 									/*}}}*/
+// TagFile::Resize - Resize the internal buffer				/*{{{*/
+// ---------------------------------------------------------------------
+/* Resize the internal buffer (double it in size). Fail if a maximum size
+ * size is reached.
+ */
+bool pkgTagFile::Resize()
+{
+   char *tmp;
+   unsigned long EndSize = End - Start;
+
+   // fail is the buffer grows too big
+   if(Size > 1024*1024+1)
+      return false;
+
+   // get new buffer and use it
+   tmp = new char[2*Size];
+   memcpy(tmp, Buffer, Size);
+   Size = Size*2;
+   delete [] Buffer;
+   Buffer = tmp;
+
+   // update the start/end pointers to the new buffer
+   Start = Buffer;
+   End = Start + EndSize;
+   return true;
+}
+									/*}}}*/
 // TagFile::Step - Advance to the next section				/*{{{*/
 // ---------------------------------------------------------------------
-/* If the Section Scanner fails we refill the buffer and try again. */
+/* If the Section Scanner fails we refill the buffer and try again. 
+ * If that fails too, double the buffer size and try again until a
+ * maximum buffer is reached.
+ */
 bool pkgTagFile::Step(pkgTagSection &Tag)
 {
-   if (Tag.Scan(Start,End - Start) == false)
+   while (Tag.Scan(Start,End - Start) == false)
    {
       if (Fill() == false)
 	 return false;
       
-      if (Tag.Scan(Start,End - Start) == false)
+      if(Tag.Scan(Start,End - Start))
+	 break;
+
+      if (Resize() == false)
 	 return _error->Error(_("Unable to parse package file %s (1)"),
-			      Fd.Name().c_str());
+				 Fd.Name().c_str());
    }
    Start += Tag.size();
    iOffset += Tag.size();
@@ -164,17 +193,8 @@ bool pkgTagFile::Jump(pkgTagSection &Tag,unsigned long Offset)
 									/*}}}*/
 // TagSection::Scan - Scan for the end of the header information	/*{{{*/
 // ---------------------------------------------------------------------
-/* This looks for the first double new line in the data stream. It also
-   indexes the tags in the section. 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;
-}
-
+/* This looks for the first double new line in the data stream.
+   It also indexes the tags in the section. */
 bool pkgTagSection::Scan(const char *Start,unsigned long MaxLength)
 {
    const char *End = Start + MaxLength;
@@ -183,10 +203,12 @@ bool pkgTagSection::Scan(const char *Start,unsigned long MaxLength)
 
    if (Stop == 0)
       return false;
-   
+
    TagCount = 0;
    while (TagCount+1 < sizeof(Indexes)/sizeof(Indexes[0]) && Stop < End)
    {
+       TrimRecord(true,End);
+
       // Start a new index and add it to the hash
       if (isspace(Stop[0]) == 0)
       {
@@ -198,14 +220,14 @@ bool pkgTagSection::Scan(const char *Start,unsigned long MaxLength)
       
       if (Stop == 0)
 	 return false;
-      
+
       for (; Stop+1 < End && Stop[1] == '\r'; Stop++);
 
       // Double newline marks the end of the record
       if (Stop+1 < End && Stop[1] == '\n')
       {
 	 Indexes[TagCount] = Stop - Section;
-	 for (; Stop < End && (Stop[0] == '\n' || Stop[0] == '\r'); Stop++);
+	 TrimRecord(false,End);
 	 return true;
       }
       
@@ -215,6 +237,16 @@ bool pkgTagSection::Scan(const char *Start,unsigned long MaxLength)
    return false;
 }
 									/*}}}*/
+// TagSection::TrimRecord - Trim off any garbage before/after a record	/*{{{*/
+// ---------------------------------------------------------------------
+/* There should be exactly 2 newline at the end of the record, no more. */
+void pkgTagSection::TrimRecord(bool BeforeRecord, const char*& End)
+{
+   if (BeforeRecord == true)
+      return;
+   for (; Stop < End && (Stop[0] == '\n' || Stop[0] == '\r'); Stop++);
+}
+									/*}}}*/
 // TagSection::Trim - Trim off any trailing garbage			/*{{{*/
 // ---------------------------------------------------------------------
 /* There should be exactly 1 newline at the end of the buffer, no more. */
@@ -333,6 +365,30 @@ signed int pkgTagSection::FindI(const char *Tag,signed long Default) const
    return Result;
 }
 									/*}}}*/
+// TagSection::FindULL - Find an unsigned long long integer		/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+unsigned long long pkgTagSection::FindULL(const char *Tag, unsigned long long const &Default) const
+{
+   const char *Start;
+   const char *Stop;
+   if (Find(Tag,Start,Stop) == false)
+      return Default;
+
+   // Copy it into a temp buffer so we can use strtoull
+   char S[100];
+   if ((unsigned)(Stop - Start) >= sizeof(S))
+      return Default;
+   strncpy(S,Start,Stop-Start);
+   S[Stop - Start] = 0;
+   
+   char *End;
+   unsigned long long Result = strtoull(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 */
@@ -361,7 +417,6 @@ bool pkgTagSection::FindFlag(const char *Tag,unsigned long &Flags,
    return true;
 }
 									/*}}}*/
-
 // TFRewrite - Rewrite a control record					/*{{{*/
 // ---------------------------------------------------------------------
 /* This writes the control record to stdout rewriting it as necessary. The
@@ -378,6 +433,7 @@ static const char *iTFRewritePackageOrder[] = {
                           "Section",
                           "Installed-Size",
                           "Maintainer",
+                          "Original-Maintainer",
                           "Architecture",
                           "Source",
                           "Version",
@@ -390,6 +446,7 @@ static const char *iTFRewritePackageOrder[] = {
                           "Recommends",
                           "Suggests",
                           "Conflicts",
+                          "Breaks",
                           "Conffiles",
                           "Filename",
                           "Size",
@@ -406,6 +463,7 @@ static const char *iTFRewriteSourceOrder[] = {"Package",
                                       "Priority",
                                       "Section",
                                       "Maintainer",
+				      "Original-Maintainer",
                                       "Build-Depends",
                                       "Build-Depends-Indep",
                                       "Build-Conflicts",