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Imported from pngcrush-1.5.9.tar

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This commit is contained in:
Glenn Randers-Pehrson
2002-07-08 19:10:41 -05:00
parent 2eb0852fd6
commit bfee24162a
23 changed files with 1214 additions and 443 deletions
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93
pngmem.c
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@@ -1,9 +1,9 @@
/* pngmem.c - stub functions for memory allocation
*
* libpng 1.2.1 - December 12, 2001
* libpng 1.2.4 - July 8, 2002
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1998-2001 Glenn Randers-Pehrson
* Copyright (c) 1998-2002 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.)
*
@@ -43,7 +43,7 @@ png_create_struct_2(int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr)
else if (type == PNG_STRUCT_PNG)
size = sizeof(png_struct);
else
return (NULL);
return (png_get_copyright());
#ifdef PNG_USER_MEM_SUPPORTED
if(malloc_fn != NULL)
@@ -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);
@@ -123,7 +123,7 @@ png_malloc(png_structp png_ptr, png_uint_32 size)
if(png_ptr->malloc_fn != NULL)
{
ret = ((png_voidp)(*(png_ptr->malloc_fn))(png_ptr, (png_size_t)size));
if (ret == NULL)
if (ret == NULL && (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
png_error(png_ptr, "Out of memory!");
return (ret);
}
@@ -177,12 +177,22 @@ png_malloc_default(png_structp png_ptr, png_uint_32 size)
if (table == NULL)
{
png_error(png_ptr, "Out Of Memory."); /* Note "O" and "M" */
if (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
png_error(png_ptr, "Out Of Memory."); /* Note "O" and "M" */
else
png_warning(png_ptr, "Out Of Memory.");
return (NULL);
}
if ((png_size_t)table & 0xfff0)
{
png_error(png_ptr, "Farmalloc didn't return normalized pointer");
if (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
png_error(png_ptr,
"Farmalloc didn't return normalized pointer");
else
png_warning(png_ptr,
"Farmalloc didn't return normalized pointer");
return (NULL);
}
png_ptr->offset_table = table;
@@ -191,7 +201,11 @@ png_malloc_default(png_structp png_ptr, png_uint_32 size)
if (png_ptr->offset_table_ptr == NULL)
{
png_error(png_ptr, "Out Of memory.");
if (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
png_error(png_ptr, "Out Of memory."); /* Note "O" and "M" */
else
png_warning(png_ptr, "Out Of memory.");
return (NULL);
}
hptr = (png_byte huge *)table;
@@ -213,7 +227,13 @@ png_malloc_default(png_structp png_ptr, png_uint_32 size)
}
if (png_ptr->offset_table_count >= png_ptr->offset_table_number)
png_error(png_ptr, "Out of Memory.");
{
if (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
png_error(png_ptr, "Out of Memory."); /* Note "o" and "M" */
else
png_warning(png_ptr, "Out of Memory.");
return (NULL);
}
ret = png_ptr->offset_table_ptr[png_ptr->offset_table_count++];
}
@@ -222,7 +242,10 @@ png_malloc_default(png_structp png_ptr, png_uint_32 size)
if (ret == NULL)
{
png_error(png_ptr, "Out of memory."); /* Note "o" and "m" */
if (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
png_error(png_ptr, "Out of memory."); /* Note "o" and "m" */
else
png_warning(png_ptr, "Out of memory."); /* Note "o" and "m" */
}
return (ret);
@@ -283,7 +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)
{
@@ -293,7 +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)
{
@@ -376,7 +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
@@ -387,21 +409,23 @@ 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));
if (ret == NULL)
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);
}
else
return (png_malloc_default(png_ptr, size));
}
png_voidp /* PRIVATE */
png_voidp PNGAPI
png_malloc_default(png_structp png_ptr, png_uint_32 size)
{
png_voidp ret;
@@ -409,7 +433,12 @@ png_malloc_default(png_structp png_ptr, png_uint_32 size)
#ifdef PNG_MAX_MALLOC_64K
if (size > (png_uint_32)65536L)
png_error(png_ptr, "Cannot Allocate > 64K");
{
if(png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
png_error(png_ptr, "Cannot Allocate > 64K");
else
return NULL;
}
#endif
#if defined(__TURBOC__) && !defined(__FLAT__)
@@ -422,7 +451,7 @@ png_malloc_default(png_structp png_ptr, png_uint_32 size)
# endif
#endif
if (ret == NULL)
if (ret == NULL && (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
png_error(png_ptr, "Out of Memory");
return (ret);
@@ -444,7 +473,7 @@ png_free(png_structp png_ptr, png_voidp ptr)
}
else png_free_default(png_ptr, ptr);
}
void /* PRIVATE */
void PNGAPI
png_free_default(png_structp png_ptr, png_voidp ptr)
{
if (png_ptr == NULL || ptr == NULL)
@@ -465,7 +494,27 @@ png_free_default(png_structp png_ptr, png_voidp ptr)
#endif /* Not Borland DOS special memory handler */
png_voidp /* PRIVATE */
#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)
{
@@ -478,7 +527,7 @@ png_memcpy_check (png_structp png_ptr, png_voidp s1, png_voidp s2,
return(png_memcpy (s1, s2, size));
}
png_voidp /* PRIVATE */
png_voidp PNGAPI
png_memset_check (png_structp png_ptr, png_voidp s1, int value,
png_uint_32 length)
{