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Imported from pngcrush-1.3.0.tar

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This commit is contained in:
Glenn Randers-Pehrson
1999-12-21 11:25:28 -06:00
parent ce85ad6640
commit 7a16d67a4b
26 changed files with 6719 additions and 674 deletions
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146
png.c
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@@ -1,15 +1,16 @@
/* png.c - location for general purpose libpng functions
*
* libpng version 1.0.5f - December 6, 1999
* libpng version 1.0.5j - December 21, 1999
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger
* Copyright (c) 1998, 1999 Glenn Randers-Pehrson
*
*
*/
#define PNG_INTERNAL
#define PNG_NO_EXTERN
#include <assert.h>
#include "png.h"
/* Version information for C files. This had better match the version
@@ -18,12 +19,12 @@
#ifdef PNG_USE_GLOBAL_ARRAYS
/* png_libpng_ver was changed to a function in version 1.0.5c */
char png_libpng_ver[12] = "1.0.5f";
char png_libpng_ver[12] = "1.0.5j";
/* png_sig was changed to a function in version 1.0.5c */
/* Place to hold the signature string for a PNG file. */
png_byte FARDATA png_sig[8] = {137, 80, 78, 71, 13, 10, 26, 10};
/* Invoke global declarations for constant strings for known chunk types */
PNG_IHDR;
PNG_IDAT;
@@ -263,27 +264,28 @@ png_info_init(png_infop info_ptr)
void
png_free_text(png_structp png_ptr, png_infop info_ptr, int num)
{
if (num != -1)
{
if (info_ptr->text[num].key)
{
png_free(png_ptr, info_ptr->text[num].key);
info_ptr->text[num].key = NULL;
}
if (info_ptr->text[num].lang)
{
png_free(png_ptr, info_ptr->text[num].lang);
info_ptr->text[num].lang = NULL;
}
}
else if (info_ptr->text != NULL)
{
int i;
for (i = 0; i < info_ptr->num_text; i++)
png_free_text(png_ptr, info_ptr, i);
png_free(png_ptr, info_ptr->text);
info_ptr->text = NULL;
}
if (png_ptr == NULL || info_ptr == NULL)
return;
if (num != -1)
{
if (info_ptr->text[num].key)
{
png_free(png_ptr, info_ptr->text[num].key);
info_ptr->text[num].key = NULL;
}
}
else if (info_ptr->text != NULL)
{
int i;
if(info_ptr->text != NULL)
{
for (i = 0; i < info_ptr->num_text; i++)
png_free_text(png_ptr, info_ptr, i);
png_free(png_ptr, info_ptr->text);
info_ptr->text = NULL;
}
info_ptr->num_text=0;
}
}
#endif
@@ -292,10 +294,18 @@ png_free_text(png_structp png_ptr, png_infop info_ptr, int num)
void
png_free_sCAL(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr == NULL || info_ptr == NULL)
return;
if (info_ptr->valid & PNG_INFO_sCAL)
{
png_free(png_ptr, info_ptr->scal_unit);
info_ptr->valid &= ~PNG_INFO_sCAL;
#if defined(PNG_FIXED_POINT_SUPPORTED)&& !defined(PNG_FLOATING_POINT_SUPPORTED)
png_free(png_ptr, info_ptr->scal_s_width);
png_free(png_ptr, info_ptr->scal_s_height);
#else
if(png_ptr != NULL)
/* silence a compiler warning */ ;
#endif
info_ptr->valid &= ~PNG_INFO_sCAL;
}
}
#endif
@@ -305,6 +315,8 @@ png_free_sCAL(png_structp png_ptr, png_infop info_ptr)
void
png_free_pCAL(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr == NULL || info_ptr == NULL)
return;
if (info_ptr->valid & PNG_INFO_pCAL)
{
png_free(png_ptr, info_ptr->pcal_purpose);
@@ -313,9 +325,9 @@ png_free_pCAL(png_structp png_ptr, png_infop info_ptr)
{
int i;
for (i = 0; i < (int)info_ptr->pcal_nparams; i++)
{
png_free(png_ptr, info_ptr->pcal_params[i]);
}
{
png_free(png_ptr, info_ptr->pcal_params[i]);
}
png_free(png_ptr, info_ptr->pcal_params);
}
info_ptr->valid &= ~PNG_INFO_pCAL;
@@ -324,10 +336,12 @@ png_free_pCAL(png_structp png_ptr, png_infop info_ptr)
#endif
#if defined(PNG_iCCP_SUPPORTED)
/* free any pCAL entry */
/* free any iCCP entry */
void
png_free_iCCP(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr == NULL || info_ptr == NULL)
return;
if (info_ptr->valid & PNG_INFO_iCCP)
{
png_free(png_ptr, info_ptr->iccp_name);
@@ -342,17 +356,23 @@ png_free_iCCP(png_structp png_ptr, png_infop info_ptr)
void
png_free_spalettes(png_structp png_ptr, png_infop info_ptr, int num)
{
if (png_ptr == NULL || info_ptr == NULL)
return;
if (num != -1)
{
png_free(png_ptr, info_ptr->splt_palettes[num].name);
png_free(png_ptr, info_ptr->splt_palettes[num].entries);
info_ptr->valid &=~ PNG_INFO_sPLT;
}
else
{
png_uint_32 i;
int i;
for (i = 0; i < info_ptr->splt_palettes_num; i++)
png_free_spalettes(png_ptr, info_ptr, num);
if(info_ptr->splt_palettes_num == 0)
return;
for (i = 0; i < (int)info_ptr->splt_palettes_num; i++)
png_free_spalettes(png_ptr, info_ptr, i);
png_free(png_ptr, info_ptr->splt_palettes);
info_ptr->splt_palettes_num = 0;
@@ -360,6 +380,48 @@ png_free_spalettes(png_structp png_ptr, png_infop info_ptr, int num)
}
#endif
#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
void
png_free_unknown_chunks(png_structp png_ptr, png_infop info_ptr, int num)
{
if (png_ptr == NULL || info_ptr == NULL)
return;
if (num != -1)
{
png_free(png_ptr, info_ptr->unknown_chunks[num].data);
info_ptr->unknown_chunks[num].data = NULL;
}
else
{
int i;
if(info_ptr->unknown_chunks_num == 0)
return;
for (i = 0; i < (int)info_ptr->unknown_chunks_num; i++)
png_free_unknown_chunks(png_ptr, info_ptr, i);
png_free(png_ptr, info_ptr->unknown_chunks);
info_ptr->unknown_chunks_num = 0;
}
}
#endif
#if defined(PNG_hIST_SUPPORTED)
/* free any hIST entry */
void
png_free_hIST(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr == NULL || info_ptr == NULL)
return;
if (info_ptr->valid & PNG_INFO_hIST)
{
png_free(png_ptr, info_ptr->hist);
info_ptr->valid &= ~PNG_INFO_hIST;
}
}
#endif
/* This is an internal routine to free any memory that the info struct is
* pointing to before re-using it or freeing the struct itself. Recall
* that png_free() checks for NULL pointers for us.
@@ -382,6 +444,12 @@ png_info_destroy(png_structp png_ptr, png_infop info_ptr)
#endif
#if defined(PNG_READ_sPLT_SUPPORTED)
png_free_spalettes(png_ptr, info_ptr, -1);
#endif
#if defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED)
png_free_unknown_chunks(png_ptr, info_ptr, -1);
#endif
#if defined(PNG_hIST_SUPPORTED)
png_free_hIST(png_ptr, info_ptr);
#endif
png_info_init(info_ptr);
}
@@ -460,7 +528,7 @@ png_charp
png_get_copyright(png_structp png_ptr)
{
if (png_ptr != NULL || png_ptr == NULL) /* silence compiler warning */
return ("\n libpng version 1.0.5f - December 6, 1999\n\
return ("\n libpng version 1.0.5j - December 21, 1999\n\
Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.\n\
Copyright (c) 1996, 1997 Andreas Dilger\n\
Copyright (c) 1998, 1999 Glenn Randers-Pehrson\n");
@@ -478,8 +546,8 @@ png_get_libpng_ver(png_structp png_ptr)
{
/* Version of *.c files used when building libpng */
if(png_ptr != NULL) /* silence compiler warning about unused png_ptr */
return("1.0.5f");
return("1.0.5f");
return("1.0.5j");
return("1.0.5j");
}
png_charp
@@ -503,8 +571,8 @@ png_get_header_version(png_structp png_ptr)
/* Generate a compiler error if there is an old png.h in the search path. */
void
png_check_version
(version_1_0_5f png_h_is_not_version_1_0_5f)
(version_1_0_5j png_h_is_not_version_1_0_5j)
{
if(png_h_is_not_version_1_0_5f == NULL)
if(png_h_is_not_version_1_0_5j == NULL)
return;
}