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Imported from libpng-0.99d.tar

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This commit is contained in:
Glenn Randers-Pehrson
1998-02-08 20:56:40 -06:00
parent 0f881d62b3
commit a357b99113
24 changed files with 3267 additions and 1198 deletions
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54
pngmem.c
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@@ -1,11 +1,11 @@
/* pngmem.c - stub functions for memory allocation
*
* libpng 0.99c
* libpng 0.99d
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger
* Copyright (c) 1998, Glenn Randers-Pehrson
* February 7, 1998
* February 8, 1998
*
* This file provides a location for all memory allocation. Users which
* need special memory handling are expected to modify the code in this file
@@ -282,27 +282,22 @@ png_voidp
PNG_MALLOC(png_structp png_ptr, png_uint_32 size)
{
png_voidp ret;
png_size_t length;
if (png_ptr == NULL || size == 0)
return ((png_voidp)NULL);
#ifdef PNG_MAX_MALLOC_64K
if (png_size > (png_uint_32)65536L)
if (size > (png_uint_32)65536L)
png_error(png_ptr, "Cannot Allocate > 64K");
#endif
length = (png_size_t)size;
if ((png_uint_32)length != size)
png_error(png_ptr, "Cannot Allocate > size_t");
#if defined(__TURBOC__) && !defined(__FLAT__)
ret = farmalloc(length);
ret = farmalloc(size);
#else
# if defined(_MSC_VER) && defined(MAXSEG_64K)
ret = halloc(length, 1);
ret = halloc(size, 1);
# else
ret = malloc(length);
ret = malloc(size);
# endif
#endif
@@ -336,32 +331,29 @@ PNG_FREE(png_structp png_ptr, png_voidp ptr)
#endif /* Not Borland DOS special memory handler */
void
png_buffered_memcpy (png_structp png_ptr, png_voidp s1, png_voidp s2,
png_voidp
png_memcpy_check (png_structp png_ptr, png_voidp s1, png_voidp s2,
png_uint_32 length)
{
png_size_t size;
png_uint_32 i;
for (i=0; i<length; i+=65530)
{
size = (png_size_t)(length - i);
if (size > (png_size_t)65530L)
size=(png_size_t)65530L;
png_memcpy (s1, s2, size);
}
size = (png_size_t)length;
if ((png_uint_32)size != length)
png_error(png_ptr,"Overflow in png_memcpy_check.");
return(png_memcpy (s1, s2, size));
}
void
png_buffered_memset (png_structp png_ptr, png_voidp s1, int value,
png_voidp
png_memset_check (png_structp png_ptr, png_voidp s1, int value,
png_uint_32 length)
{
png_size_t size;
png_uint_32 i;
for (i=0; i<length; i+=65530)
{
size = length - i;
if (size > 65530)
size=65530;
png_memset (s1, value, size);
}
size = (png_size_t)length;
if ((png_uint_32)size != length)
png_error(png_ptr,"Overflow in png_memset_check.");
return (png_memset (s1, value, size));
}