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Imported from libpng-1.2.6beta4.tar

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This commit is contained in:
Glenn Randers-Pehrson
2004-07-28 08:20:44 -05:00
parent 5b5dcf8b88
commit 5fea36fb00
37 changed files with 621 additions and 307 deletions
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46
png.c
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@@ -1,7 +1,7 @@
/* png.c - location for general purpose libpng functions
*
* libpng version 1.2.6beta3 - July 18, 2004
* libpng version 1.2.6beta4 - July 28, 2004
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1998-2004 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -13,7 +13,7 @@
#include "png.h"
/* Generate a compiler error if there is an old png.h in the search path. */
typedef version_1_2_6beta3 Your_png_h_is_not_version_1_2_6beta3;
typedef version_1_2_6beta4 Your_png_h_is_not_version_1_2_6beta4;
/* Version information for C files. This had better match the version
* string defined in png.h. */
@@ -142,16 +142,23 @@ voidpf /* private */
#endif
png_zalloc(voidpf png_ptr, uInt items, uInt size)
{
png_uint_32 num_bytes = (png_uint_32)items * size;
png_voidp ptr;
png_structp p=png_ptr;
png_uint_32 save_flags=p->flags;
png_uint_32 num_bytes;
if (items > PNG_UINT_32_MAX/size)
{
png_warning (png_ptr, "Potential overflow in png_zalloc()");
return (NULL);
}
num_bytes = (png_uint_32)items * size;
p->flags|=PNG_FLAG_MALLOC_NULL_MEM_OK;
ptr = (png_voidp)png_malloc((png_structp)png_ptr, num_bytes);
p->flags=save_flags;
#ifndef PNG_NO_ZALLOC_ZERO
#if defined(PNG_1_0_X) && !defined(PNG_NO_ZALLOC_ZERO)
if (ptr == NULL)
return ((voidpf)ptr);
@@ -217,7 +224,7 @@ png_calculate_crc(png_structp png_ptr, png_bytep ptr, png_size_t length)
/* Allocate the memory for an info_struct for the application. We don't
* really need the png_ptr, but it could potentially be useful in the
* future. This should be used in favour of malloc(sizeof(png_info))
* future. This should be used in favour of malloc(png_sizeof(png_info))
* and png_info_init() so that applications that want to use a shared
* libpng don't have to be recompiled if png_info changes size.
*/
@@ -235,7 +242,7 @@ png_create_info_struct(png_structp png_ptr)
info_ptr = (png_infop)png_create_struct(PNG_STRUCT_INFO);
#endif
if (info_ptr != NULL)
png_info_init_3(&info_ptr, sizeof(png_info));
png_info_init_3(&info_ptr, png_sizeof(png_info));
return (info_ptr);
}
@@ -287,7 +294,7 @@ png_info_init_3(png_infopp ptr_ptr, png_size_t png_info_struct_size)
png_debug(1, "in png_info_init_3\n");
if(sizeof(png_info) > png_info_struct_size)
if(png_sizeof(png_info) > png_info_struct_size)
{
png_destroy_struct(info_ptr);
info_ptr = (png_infop)png_create_struct(PNG_STRUCT_INFO);
@@ -295,7 +302,7 @@ png_info_init_3(png_infopp ptr_ptr, png_size_t png_info_struct_size)
}
/* set everything to 0 */
png_memset(info_ptr, 0, sizeof (png_info));
png_memset(info_ptr, 0, png_sizeof (png_info));
}
#ifdef PNG_FREE_ME_SUPPORTED
@@ -581,7 +588,7 @@ png_info_destroy(png_structp png_ptr, png_infop info_ptr)
}
#endif
png_info_init_3(&info_ptr, sizeof(png_info));
png_info_init_3(&info_ptr, png_sizeof(png_info));
}
/* This function returns a pointer to the io_ptr associated with the user
@@ -623,7 +630,7 @@ png_convert_to_rfc1123(png_structp png_ptr, png_timep ptime)
if (png_ptr->time_buffer == NULL)
{
png_ptr->time_buffer = (png_charp)png_malloc(png_ptr, (png_uint_32)(29*
sizeof(char)));
png_sizeof(char)));
}
#if defined(_WIN32_WCE)
@@ -645,7 +652,7 @@ png_convert_to_rfc1123(png_structp png_ptr, png_timep ptime)
ptime->year, ptime->hour % 24, ptime->minute % 60,
ptime->second % 61);
png_memcpy(png_ptr->time_buffer, near_time_buf,
29*sizeof(char));
29*png_sizeof(char));
}
#else
sprintf(png_ptr->time_buffer, "%d %s %d %02d:%02d:%02d +0000",
@@ -671,9 +678,8 @@ png_charp PNGAPI
png_get_copyright(png_structp png_ptr)
{
if (&png_ptr != NULL) /* silence compiler warning about unused png_ptr */
return ((png_charp) "\n libpng version 1.2.6beta3 - July 18, 2004\n\
Copyright (c) 2003-2004 Cosmin Truta\n\
Copyright (c) 1998-2002 Glenn Randers-Pehrson\n\
return ((png_charp) "\n libpng version 1.2.6beta4 - July 28, 2004\n\
Copyright (c) 1998-2004 Glenn Randers-Pehrson\n\
Copyright (c) 1996-1997 Andreas Dilger\n\
Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.\n");
return ((png_charp) "");
@@ -806,3 +812,15 @@ png_mmx_support(void)
}
#endif
#endif /* PNG_1_0_X */
#ifdef PNG_SIZE_T
/* Added at libpng version 1.2.6 */
PNG_EXTERN png_size_t PNGAPI png_convert_size PNGARG((size_t size));
png_size_t PNGAPI
png_convert_size(size_t size)
{
if (size > (png_size_t)-1)
PNG_ABORT(); /* We haven't got access to png_ptr, so no png_error() */
return ((png_size_t)size);
}
#endif /* PNG_SIZE_T */