check that the version of __sync_sub_and_fetch that returns a value is supported...

[wxWidgets.git] / src / png / pngrio.c

diff --git a/src/png/pngrio.c b/src/png/pngrio.c
index bb4197d2bafd37fe3002004072178e9cfc552459..7d2522f1f86e9ca7ee3c0478c9522fadb948c93d 100644 (file)
--- a/src/png/pngrio.c
+++ b/src/png/pngrio.c
@@ -1,9 +1,9 @@
 
 /* pngrio.c - functions for data input
  *
 
 /* pngrio.c - functions for data input
  *

- * libpng 1.2.4 - July 8, 2002
+ * Last changed in libpng 1.2.13 November 13, 2006

  * For conditions of distribution and use, see copyright notice in png.h
  * For conditions of distribution and use, see copyright notice in png.h

- * Copyright (c) 1998-2002 Glenn Randers-Pehrson
+ * Copyright (c) 1998-2006 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.)
  *
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
  *


@@ -18,6 +18,8 @@
 #define PNG_INTERNAL
 #include "png.h"
 
 #define PNG_INTERNAL
 #include "png.h"
 

+#if defined(PNG_READ_SUPPORTED)
+

 /* Read the data from whatever input you are using.  The default routine
    reads from a file pointer.  Note that this routine sometimes gets called
    with very small lengths, so you should implement some kind of simple
 /* Read the data from whatever input you are using.  The default routine
    reads from a file pointer.  Note that this routine sometimes gets called
    with very small lengths, so you should implement some kind of simple


@@ -44,6 +46,7 @@ png_default_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
 {
    png_size_t check;
 
 {
    png_size_t check;
 

+   if(png_ptr == NULL) return;

    /* fread() returns 0 on error, so it is OK to store this in a png_size_t
     * instead of an int, which is what fread() actually returns.
     */
    /* fread() returns 0 on error, so it is OK to store this in a png_size_t
     * instead of an int, which is what fread() actually returns.
     */


@@ -67,13 +70,14 @@ png_default_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
 #define NEAR_BUF_SIZE 1024
 #define MIN(a,b) (a <= b ? a : b)
 
 #define NEAR_BUF_SIZE 1024
 #define MIN(a,b) (a <= b ? a : b)
 

-static void /* PRIVATE */
+static void PNGAPI

 png_default_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
 {
    int check;
    png_byte *n_data;
    png_FILE_p io_ptr;
 
 png_default_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
 {
    int check;
    png_byte *n_data;
    png_FILE_p io_ptr;
 

+   if(png_ptr == NULL) return;

    /* Check if data really is near. If so, use usual code. */
    n_data = (png_byte *)CVT_PTR_NOCHECK(data);
    io_ptr = (png_FILE_p)CVT_PTR(png_ptr->io_ptr);
    /* Check if data really is near. If so, use usual code. */
    n_data = (png_byte *)CVT_PTR_NOCHECK(data);
    io_ptr = (png_FILE_p)CVT_PTR(png_ptr->io_ptr);


@@ -134,6 +138,7 @@ void PNGAPI
 png_set_read_fn(png_structp png_ptr, png_voidp io_ptr,
    png_rw_ptr read_data_fn)
 {
 png_set_read_fn(png_structp png_ptr, png_voidp io_ptr,
    png_rw_ptr read_data_fn)
 {

+   if(png_ptr == NULL) return;

    png_ptr->io_ptr = io_ptr;
 
 #if !defined(PNG_NO_STDIO)
    png_ptr->io_ptr = io_ptr;
 
 #if !defined(PNG_NO_STDIO)


@@ -159,3 +164,4 @@ png_set_read_fn(png_structp png_ptr, png_voidp io_ptr,
    png_ptr->output_flush_fn = NULL;
 #endif
 }
    png_ptr->output_flush_fn = NULL;
 #endif
 }

+#endif /* PNG_READ_SUPPORTED */