*** empty log message ***

1 files changed, 66 insertions, 57 deletions

diff --git a/src/libpng/pngmem.c b/src/libpng/pngmem.c
index 248060f..d1999b6 100644
--- a/src/libpng/pngmem.c
+++ b/src/libpng/pngmem.c
@@ -1,9 +1,9 @@
 
 /* pngmem.c - stub functions for memory allocation
  *
- * Last changed in libpng 1.2.13 November 13, 2006
+ * Last changed in libpng 1.2.37 [June 4, 2009]
  * For conditions of distribution and use, see copyright notice in png.h
- * Copyright (c) 1998-2006 Glenn Randers-Pehrson
+ * Copyright (c) 1998-2009 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
  *
@@ -16,12 +16,11 @@
 
 #define PNG_INTERNAL
 #include "png.h"
-
 #if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
 
 /* Borland DOS special memory handler */
 #if defined(__TURBOC__) && !defined(_Windows) && !defined(__FLAT__)
-/* if you change this, be sure to change the one in png.h also */
+/* If you change this, be sure to change the one in png.h also */
 
 /* Allocate memory for a png_struct.  The malloc and memset can be replaced
    by a single call to calloc() if this is thought to improve performance. */
@@ -41,14 +40,14 @@ png_create_struct_2(int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr)
    png_voidp struct_ptr;
 
    if (type == PNG_STRUCT_INFO)
-     size = png_sizeof(png_info);
+      size = png_sizeof(png_info);
    else if (type == PNG_STRUCT_PNG)
-     size = png_sizeof(png_struct);
+      size = png_sizeof(png_struct);
    else
-     return (png_get_copyright(NULL));
+      return (png_get_copyright(NULL));
 
 #ifdef PNG_USER_MEM_SUPPORTED
-   if(malloc_fn != NULL)
+   if (malloc_fn != NULL)
    {
       png_struct dummy_struct;
       png_structp png_ptr = &dummy_struct;
@@ -57,7 +56,7 @@ png_create_struct_2(int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr)
    }
    else
 #endif /* PNG_USER_MEM_SUPPORTED */
-      struct_ptr = (png_voidp)farmalloc(size);
+   struct_ptr = (png_voidp)farmalloc(size);
    if (struct_ptr != NULL)
       png_memset(struct_ptr, 0, size);
    return (struct_ptr);
@@ -80,7 +79,7 @@ png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn,
    if (struct_ptr != NULL)
    {
 #ifdef PNG_USER_MEM_SUPPORTED
-      if(free_fn != NULL)
+      if (free_fn != NULL)
       {
          png_struct dummy_struct;
          png_structp png_ptr = &dummy_struct;
@@ -122,10 +121,10 @@ png_malloc(png_structp png_ptr, png_uint_32 size)
       return (NULL);
 
 #ifdef PNG_USER_MEM_SUPPORTED
-   if(png_ptr->malloc_fn != NULL)
-       ret = ((png_voidp)(*(png_ptr->malloc_fn))(png_ptr, (png_size_t)size));
+   if (png_ptr->malloc_fn != NULL)
+      ret = ((png_voidp)(*(png_ptr->malloc_fn))(png_ptr, (png_size_t)size));
    else
-       ret = (png_malloc_default(png_ptr, size));
+      ret = (png_malloc_default(png_ptr, size));
    if (ret == NULL && (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
        png_error(png_ptr, "Out of memory!");
    return (ret);
@@ -150,12 +149,12 @@ png_malloc_default(png_structp png_ptr, png_uint_32 size)
 #endif
 
    if (size != (size_t)size)
-     ret = NULL;
+      ret = NULL;
    else if (size == (png_uint_32)65536L)
    {
       if (png_ptr->offset_table == NULL)
       {
-         /* try to see if we need to do any of this fancy stuff */
+         /* Try to see if we need to do any of this fancy stuff */
          ret = farmalloc(size);
          if (ret == NULL || ((png_size_t)ret & 0xffff))
          {
@@ -171,7 +170,7 @@ png_malloc_default(png_structp png_ptr, png_uint_32 size)
                ret = NULL;
             }
 
-            if(png_ptr->zlib_window_bits > 14)
+            if (png_ptr->zlib_window_bits > 14)
                num_blocks = (int)(1 << (png_ptr->zlib_window_bits - 14));
             else
                num_blocks = 1;
@@ -210,7 +209,7 @@ png_malloc_default(png_structp png_ptr, png_uint_32 size)
 
             png_ptr->offset_table = table;
             png_ptr->offset_table_ptr = farmalloc(num_blocks *
-               png_sizeof (png_bytep));
+               png_sizeof(png_bytep));
 
             if (png_ptr->offset_table_ptr == NULL)
             {
@@ -270,9 +269,10 @@ png_malloc_default(png_structp png_ptr, png_uint_32 size)
    return (ret);
 }
 
-/* free a pointer allocated by png_malloc().  In the default
-   configuration, png_ptr is not used, but is passed in case it
-   is needed.  If ptr is NULL, return without taking any action. */
+/* Free a pointer allocated by png_malloc().  In the default
+ * configuration, png_ptr is not used, but is passed in case it
+ * is needed.  If ptr is NULL, return without taking any action.
+ */
 void PNGAPI
 png_free(png_structp png_ptr, png_voidp ptr)
 {
@@ -285,7 +285,8 @@ png_free(png_structp png_ptr, png_voidp ptr)
       (*(png_ptr->free_fn))(png_ptr, ptr);
       return;
    }
-   else png_free_default(png_ptr, ptr);
+   else
+      png_free_default(png_ptr, ptr);
 }
 
 void PNGAPI
@@ -293,7 +294,8 @@ png_free_default(png_structp png_ptr, png_voidp ptr)
 {
 #endif /* PNG_USER_MEM_SUPPORTED */
 
-   if(png_ptr == NULL) return;
+   if (png_ptr == NULL || ptr == NULL)
+      return;
 
    if (png_ptr->offset_table != NULL)
    {
@@ -353,7 +355,7 @@ png_create_struct_2(int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr)
       return (NULL);
 
 #ifdef PNG_USER_MEM_SUPPORTED
-   if(malloc_fn != NULL)
+   if (malloc_fn != NULL)
    {
       png_struct dummy_struct;
       png_structp png_ptr = &dummy_struct;
@@ -369,7 +371,7 @@ png_create_struct_2(int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr)
    struct_ptr = (png_voidp)farmalloc(size);
 #else
 # if defined(_MSC_VER) && defined(MAXSEG_64K)
-   struct_ptr = (png_voidp)halloc(size,1);
+   struct_ptr = (png_voidp)halloc(size, 1);
 # else
    struct_ptr = (png_voidp)malloc(size);
 # endif
@@ -398,7 +400,7 @@ png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn,
    if (struct_ptr != NULL)
    {
 #ifdef PNG_USER_MEM_SUPPORTED
-      if(free_fn != NULL)
+      if (free_fn != NULL)
       {
          png_struct dummy_struct;
          png_structp png_ptr = &dummy_struct;
@@ -420,10 +422,12 @@ png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn,
 }
 
 /* Allocate memory.  For reasonable files, size should never exceed
-   64K.  However, zlib may allocate more then 64K if you don't tell
-   it not to.  See zconf.h and png.h for more information.  zlib does
-   need to allocate exactly 64K, so whatever you call here must
-   have the ability to do that. */
+ * 64K.  However, zlib may allocate more then 64K if you don't tell
+ * it not to.  See zconf.h and png.h for more information.  zlib does
+ * need to allocate exactly 64K, so whatever you call here must
+ * have the ability to do that.
+ */
+
 
 png_voidp PNGAPI
 png_malloc(png_structp png_ptr, png_uint_32 size)
@@ -434,10 +438,10 @@ png_malloc(png_structp png_ptr, png_uint_32 size)
    if (png_ptr == NULL || size == 0)
       return (NULL);
 
-   if(png_ptr->malloc_fn != NULL)
-       ret = ((png_voidp)(*(png_ptr->malloc_fn))(png_ptr, (png_size_t)size));
+   if (png_ptr->malloc_fn != NULL)
+      ret = ((png_voidp)(*(png_ptr->malloc_fn))(png_ptr, (png_size_t)size));
    else
-       ret = (png_malloc_default(png_ptr, size));
+      ret = (png_malloc_default(png_ptr, size));
    if (ret == NULL && (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
        png_error(png_ptr, "Out of Memory!");
    return (ret);
@@ -456,7 +460,7 @@ png_malloc_default(png_structp png_ptr, png_uint_32 size)
    if (size > (png_uint_32)65536L)
    {
 #ifndef PNG_USER_MEM_SUPPORTED
-      if(png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
+      if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
          png_error(png_ptr, "Cannot Allocate > 64K");
       else
 #endif
@@ -464,23 +468,23 @@ png_malloc_default(png_structp png_ptr, png_uint_32 size)
    }
 #endif
 
- /* Check for overflow */
+   /* Check for overflow */
 #if defined(__TURBOC__) && !defined(__FLAT__)
- if (size != (unsigned long)size)
-   ret = NULL;
- else
-   ret = farmalloc(size);
+   if (size != (unsigned long)size)
+      ret = NULL;
+   else
+      ret = farmalloc(size);
 #else
 # if defined(_MSC_VER) && defined(MAXSEG_64K)
- if (size != (unsigned long)size)
-   ret = NULL;
- else
-   ret = halloc(size, 1);
+   if (size != (unsigned long)size)
+      ret = NULL;
+   else
+      ret = halloc(size, 1);
 # else
- if (size != (size_t)size)
-   ret = NULL;
- else
-   ret = malloc((size_t)size);
+   if (size != (size_t)size)
+      ret = NULL;
+   else
+      ret = malloc((size_t)size);
 # endif
 #endif
 
@@ -493,7 +497,8 @@ png_malloc_default(png_structp png_ptr, png_uint_32 size)
 }
 
 /* Free a pointer allocated by png_malloc().  If ptr is NULL, return
-   without taking any action. */
+ * without taking any action.
+ */
 void PNGAPI
 png_free(png_structp png_ptr, png_voidp ptr)
 {
@@ -506,7 +511,8 @@ png_free(png_structp png_ptr, png_voidp ptr)
       (*(png_ptr->free_fn))(png_ptr, ptr);
       return;
    }
-   else png_free_default(png_ptr, ptr);
+   else
+      png_free_default(png_ptr, ptr);
 }
 void PNGAPI
 png_free_default(png_structp png_ptr, png_voidp ptr)
@@ -542,9 +548,10 @@ png_malloc_warn(png_structp png_ptr, png_uint_32 size)
 {
    png_voidp ptr;
    png_uint_32 save_flags;
-   if(png_ptr == NULL) return (NULL);
+   if (png_ptr == NULL)
+      return (NULL);
 
-   save_flags=png_ptr->flags;
+   save_flags = png_ptr->flags;
    png_ptr->flags|=PNG_FLAG_MALLOC_NULL_MEM_OK;
    ptr = (png_voidp)png_malloc((png_structp)png_ptr, size);
    png_ptr->flags=save_flags;
@@ -560,7 +567,7 @@ png_memcpy_check (png_structp png_ptr, png_voidp s1, png_voidp s2,
 
    size = (png_size_t)length;
    if ((png_uint_32)size != length)
-      png_error(png_ptr,"Overflow in png_memcpy_check.");
+      png_error(png_ptr, "Overflow in png_memcpy_check.");
 
    return(png_memcpy (s1, s2, size));
 }
@@ -573,7 +580,7 @@ png_memset_check (png_structp png_ptr, png_voidp s1, int value,
 
    size = (png_size_t)length;
    if ((png_uint_32)size != length)
-      png_error(png_ptr,"Overflow in png_memset_check.");
+      png_error(png_ptr, "Overflow in png_memset_check.");
 
    return (png_memset (s1, value, size));
 
@@ -587,10 +594,11 @@ void PNGAPI
 png_set_mem_fn(png_structp png_ptr, png_voidp mem_ptr, png_malloc_ptr
   malloc_fn, png_free_ptr free_fn)
 {
-   if(png_ptr != NULL) {
-   png_ptr->mem_ptr = mem_ptr;
-   png_ptr->malloc_fn = malloc_fn;
-   png_ptr->free_fn = free_fn;
+   if (png_ptr != NULL)
+   {
+      png_ptr->mem_ptr = mem_ptr;
+      png_ptr->malloc_fn = malloc_fn;
+      png_ptr->free_fn = free_fn;
    }
 }
 
@@ -601,7 +609,8 @@ png_set_mem_fn(png_structp png_ptr, png_voidp mem_ptr, png_malloc_ptr
 png_voidp PNGAPI
 png_get_mem_ptr(png_structp png_ptr)
 {
-   if(png_ptr == NULL) return (NULL);
+   if (png_ptr == NULL)
+      return (NULL);
    return ((png_voidp)png_ptr->mem_ptr);
 }
 #endif /* PNG_USER_MEM_SUPPORTED */