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[libpng10] Imported from libpng-1.0.14.tar

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This commit is contained in:
Glenn Randers-Pehrson
2002-07-07 19:48:06 -05:00
parent 80b4f15ae3
commit 787081f75b
71 changed files with 2878 additions and 1162 deletions
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35
pngmem.c
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@@ -1,7 +1,7 @@
/* pngmem.c - stub functions for memory allocation
*
* libpng 1.0.13 - April 15, 2002
* libpng 1.0.14 - July 8, 2002
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1998-2002 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -110,12 +110,12 @@ png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn,
* result, we would be truncating potentially larger memory requests
* (which should cause a fatal error) and introducing major problems.
*/
png_voidp PNGAPI
png_malloc(png_structp png_ptr, png_uint_32 size)
{
#ifndef PNG_USER_MEM_SUPPORTED
png_voidp ret;
#endif
if (png_ptr == NULL || size == 0)
return (NULL);
@@ -306,7 +306,7 @@ png_free_default(png_structp png_ptr, png_voidp ptr)
/* Allocate memory for a png_struct or a png_info. The malloc and
memset can be replaced by a single call to calloc() if this is thought
to improve performance noticably.*/
to improve performance noticably. */
png_voidp /* PRIVATE */
png_create_struct(int type)
{
@@ -316,7 +316,7 @@ png_create_struct(int type)
/* Allocate memory for a png_struct or a png_info. The malloc and
memset can be replaced by a single call to calloc() if this is thought
to improve performance noticably.*/
to improve performance noticably. */
png_voidp /* PRIVATE */
png_create_struct_2(int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr)
{
@@ -399,7 +399,6 @@ 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
@@ -410,13 +409,14 @@ png_voidp PNGAPI
png_malloc(png_structp png_ptr, png_uint_32 size)
{
png_voidp ret;
if (png_ptr == NULL || size == 0)
return (NULL);
#ifdef PNG_USER_MEM_SUPPORTED
if(png_ptr->malloc_fn != NULL)
{
ret = ((png_voidp)(*(png_ptr->malloc_fn))(png_ptr, size));
ret = ((png_voidp)(*(png_ptr->malloc_fn))(png_ptr, (png_size_t)size));
if (ret == NULL && (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
png_error(png_ptr, "Out of Memory!");
return (ret);
@@ -424,6 +424,7 @@ png_malloc(png_structp png_ptr, png_uint_32 size)
else
return (png_malloc_default(png_ptr, size));
}
png_voidp PNGAPI
png_malloc_default(png_structp png_ptr, png_uint_32 size)
{
@@ -493,6 +494,26 @@ png_free_default(png_structp png_ptr, png_voidp ptr)
#endif /* Not Borland DOS special memory handler */
#if defined(PNG_1_0_X)
# define png_malloc_warn png_malloc
#else
/* This function was added at libpng version 1.2.3. The png_malloc_warn()
* function will issue a png_warning and return NULL instead of issuing a
* png_error, if it fails to allocate the requested memory.
*/
png_voidp PNGAPI
png_malloc_warn(png_structp png_ptr, png_uint_32 size)
{
png_voidp ptr;
png_uint_32 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;
return(ptr);
}
#endif
png_voidp PNGAPI
png_memcpy_check (png_structp png_ptr, png_voidp s1, png_voidp s2,
png_uint_32 length)