From 4ab24e53db1d39cd26072f03795efd0f6425a369 Mon Sep 17 00:00:00 2001
From: Michael Vogt <michael.vogt@ubuntu.com>
Date: Thu, 30 Nov 2006 15:06:28 +0100
Subject: [PATCH] * apt-pkg/deb/debsrcrecords.{cc,h}:   - make the buffer
 dynmaic

---
 apt-pkg/deb/debsrcrecords.cc | 28 +++++++++-------------------
 apt-pkg/deb/debsrcrecords.h  | 10 +++++-----
 debian/changelog             |  2 ++
 3 files changed, 16 insertions(+), 24 deletions(-)

diff --git a/apt-pkg/deb/debsrcrecords.cc b/apt-pkg/deb/debsrcrecords.cc
index cac36c2e..17645a5a 100644
--- a/apt-pkg/deb/debsrcrecords.cc
+++ b/apt-pkg/deb/debsrcrecords.cc
@@ -18,6 +18,8 @@
 #include <apt-pkg/error.h>
 #include <apt-pkg/strutl.h>
 #include <apt-pkg/configuration.h>
+
+using std::max;
 									/*}}}*/
 
 // SrcRecordParser::Binaries - Return the binaries field		/*{{{*/
@@ -34,31 +36,19 @@ const char **debSrcRecordParser::Binaries()
    if (Bins.empty() == true || Bins.length() >= 102400)
       return 0;
    
-   // Workaround for #236688.  Only allocate a new buffer if the field
-   // is large, to avoid a performance penalty
-   char *BigBuf = NULL;
-   char *Buf;
-   if (Bins.length() > sizeof(Buffer))
-   {
-      BigBuf = new char[Bins.length()];
-      Buf = BigBuf;
-   }
-   else
+   if (Bins.length() > BufSize)
    {
-      Buf = Buffer;
+      delete [] Buffer;
+      // allocate new size based on buffer (but never smaller than 4000)
+      BufSize = max((unsigned long)4000, max(Bins.length()+1,2*BufSize));
+      Buffer = new char[BufSize];
    }
 
-   strcpy(Buf,Bins.c_str());
-   if (TokSplitString(',',Buf,StaticBinList,
+   strcpy(Buffer,Bins.c_str());
+   if (TokSplitString(',',Buffer,StaticBinList,
 		      sizeof(StaticBinList)/sizeof(StaticBinList[0])) == false)
-   {
-      if (BigBuf != NULL)
-         delete BigBuf;
       return 0;
-   }
 
-   if (BigBuf != NULL)
-      delete BigBuf;
    return (const char **)StaticBinList;
 }
 									/*}}}*/
diff --git a/apt-pkg/deb/debsrcrecords.h b/apt-pkg/deb/debsrcrecords.h
index f899993d..f4e2cb46 100644
--- a/apt-pkg/deb/debsrcrecords.h
+++ b/apt-pkg/deb/debsrcrecords.h
@@ -24,9 +24,10 @@ class debSrcRecordParser : public pkgSrcRecords::Parser
    FileFd Fd;
    pkgTagFile Tags;
    pkgTagSection Sect;
-   char Buffer[10000];
    char *StaticBinList[400];
    unsigned long iOffset;
+   char *Buffer;
+   unsigned long BufSize;
    
    public:
 
@@ -49,10 +50,9 @@ class debSrcRecordParser : public pkgSrcRecords::Parser
    };
    virtual bool Files(vector<pkgSrcRecords::File> &F);
 
-   debSrcRecordParser(string File,pkgIndexFile const *Index) :
-                   Parser(Index),      
-                   Fd(File,FileFd::ReadOnly),
-                   Tags(&Fd,102400) {};
+   debSrcRecordParser(string File,pkgIndexFile const *Index) 
+      : Parser(Index), Fd(File,FileFd::ReadOnly), Tags(&Fd,102400), 
+        Buffer(0), BufSize(0) {}
 };
 
 #endif
diff --git a/debian/changelog b/debian/changelog
index 8da0d647..a3cb3028 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -4,6 +4,8 @@ apt (0.6.46.4) unstable; urgency=low
   * apt-pkg/deb/dpkgpm.cc:
     - added "Dpkg::StopOnError" variable that controls if apt
       will abort on errors from dpkg
+  * apt-pkg/deb/debsrcrecords.{cc,h}:
+    - make the Buffer dynmaic
 
  --
 
-- 
2.20.1