From 0a7c36af5431bc86e8e4a53e652002acd0079ffa Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michaelni@gmx.at>
Date: Thu, 17 Aug 2006 08:18:48 +0000
Subject: [PATCH] revert aligned realloc() changesm this should be identical to
 r5784

Originally committed as revision 6008 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 libavutil/mem.c | 26 +++++++++++---------------
 1 file changed, 11 insertions(+), 15 deletions(-)

diff --git a/libavutil/mem.c b/libavutil/mem.c
index cdfefd6..440328b 100644
--- a/libavutil/mem.c
+++ b/libavutil/mem.c
@@ -50,7 +50,7 @@ void *av_malloc(unsigned int size)
 #endif
 
     /* let's disallow possible ambiguous cases */
-    if(size > (INT_MAX-16) || !size)
+    if(size > (INT_MAX-16) )
         return NULL;
 
 #ifdef MEMALIGN_HACK
@@ -101,26 +101,22 @@ void *av_malloc(unsigned int size)
  */
 void *av_realloc(void *ptr, unsigned int size)
 {
-    void *ptr2;
+#ifdef MEMALIGN_HACK
+    int diff;
+#endif
 
     /* let's disallow possible ambiguous cases */
     if(size > (INT_MAX-16) )
         return NULL;
 
-#ifndef MEMALIGN_HACK
-    ptr= realloc(ptr, size);
-assert(((int)((void*)0)&15) == 0); //for the null pointer pedants
-    if(!((int)ptr&15))
-        return ptr;
+#ifdef MEMALIGN_HACK
+    //FIXME this isn't aligned correctly, though it probably isn't needed
+    if(!ptr) return av_malloc(size);
+    diff= ((char*)ptr)[-1];
+    return realloc(ptr - diff, size + diff) + diff;
+#else
+    return realloc(ptr, size);
 #endif
-
-    ptr2= av_malloc(size);
-    if(ptr && ptr2)
-        memcpy(ptr2, ptr, size);
-    if(ptr2 || !size)
-        av_free(ptr);
-
-    return ptr2;
 }
 
 /**
-- 
2.7.4