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Imported from libpng-1.0.11rc1.tar

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This commit is contained in:
Glenn Randers-Pehrson
2001-04-20 10:32:10 -05:00
parent e1eff58f87
commit 82ae383331
54 changed files with 396 additions and 739 deletions
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168
pngpread.c
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@@ -1,7 +1,7 @@
/* pngpread.c - read a png file in push mode
*
* libpng 1.0.11beta3 - April 15, 2001
* libpng 1.0.11rc1 - April 20, 2001
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1998-2001 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -585,18 +585,9 @@ png_push_save_buffer(png_structp png_ptr)
old_buffer = png_ptr->save_buffer;
png_ptr->save_buffer = (png_bytep)png_malloc(png_ptr,
(png_uint_32)new_max);
if (png_ptr->save_buffer == (png_bytep)NULL)
{
png_warning(png_ptr, "Malloc of save buffer failed");
png_ptr->save_buffer=old_buffer;
png_ptr->current_buffer_size = 0;
}
else
{
png_memcpy(png_ptr->save_buffer, old_buffer, png_ptr->save_buffer_size);
png_free(png_ptr, old_buffer);
png_ptr->save_buffer_max = new_max;
}
png_memcpy(png_ptr->save_buffer, old_buffer, png_ptr->save_buffer_size);
png_free(png_ptr, old_buffer);
png_ptr->save_buffer_max = new_max;
}
if (png_ptr->current_buffer_size)
{
@@ -1004,7 +995,8 @@ png_read_push_finish_row(png_structp png_ptr)
#if defined(PNG_READ_tEXt_SUPPORTED)
void /* PRIVATE */
png_push_handle_tEXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
png_push_handle_tEXt(png_structp png_ptr, png_infop info_ptr, png_uint_32
length)
{
if (!(png_ptr->mode & PNG_HAVE_IHDR) || (png_ptr->mode & PNG_HAVE_IEND))
{
@@ -1016,7 +1008,7 @@ png_push_handle_tEXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length
#ifdef PNG_MAX_MALLOC_64K
png_ptr->skip_length = 0; /* This may not be necessary */
if (length > (png_uint_32)65535L) /* Can't hold the entire string in memory */
if (length > (png_uint_32)65535L) /* Can't hold entire string in memory */
{
png_warning(png_ptr, "tEXt chunk too large to fit in memory");
png_ptr->skip_length = length - (png_uint_32)65535L;
@@ -1026,12 +1018,6 @@ png_push_handle_tEXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length
png_ptr->current_text = (png_charp)png_malloc(png_ptr,
(png_uint_32)(length+1));
if (png_ptr->current_text == (png_charp)NULL)
{
png_warning (png_ptr, "malloc of current text failed");
png_ptr->skip_length=length;
return;
}
png_ptr->current_text[length] = '\0';
png_ptr->current_text_ptr = png_ptr->current_text;
png_ptr->current_text_size = (png_size_t)length;
@@ -1083,11 +1069,6 @@ png_push_read_tEXt(png_structp png_ptr, png_infop info_ptr)
text++;
text_ptr = (png_textp)png_malloc(png_ptr, (png_uint_32)sizeof(png_text));
if (text_ptr == (png_textp)NULL)
{
png_warning (png_ptr, "malloc of text buffer failed");
return;
}
text_ptr->compression = PNG_TEXT_COMPRESSION_NONE;
text_ptr->key = key;
#ifdef PNG_iTXt_SUPPORTED
@@ -1106,7 +1087,8 @@ png_push_read_tEXt(png_structp png_ptr, png_infop info_ptr)
#if defined(PNG_READ_zTXt_SUPPORTED)
void /* PRIVATE */
png_push_handle_zTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
png_push_handle_zTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32
length)
{
if (!(png_ptr->mode & PNG_HAVE_IHDR) || (png_ptr->mode & PNG_HAVE_IEND))
{
@@ -1130,12 +1112,6 @@ png_push_handle_zTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length
png_ptr->current_text = (png_charp)png_malloc(png_ptr,
(png_uint_32)(length+1));
if (png_ptr->current_text == (png_charp)NULL)
{
png_warning (png_ptr, "malloc of zTXt buffer failed");
png_push_crc_skip(png_ptr, length);
return;
}
png_ptr->current_text[length] = '\0';
png_ptr->current_text_ptr = png_ptr->current_text;
png_ptr->current_text_size = (png_size_t)length;
@@ -1224,19 +1200,14 @@ png_push_read_zTXt(png_structp png_ptr, png_infop info_ptr)
if (text == NULL)
{
text = (png_charp)png_malloc(png_ptr,
(png_uint_32)(png_ptr->zbuf_size - png_ptr->zstream.avail_out +
key_size + 1));
if (text == (png_charp)NULL)
png_warning(png_ptr, "Malloc of text block failed");
else
{
png_memcpy(text + key_size, png_ptr->zbuf,
png_ptr->zbuf_size - png_ptr->zstream.avail_out);
png_memcpy(text, key, key_size);
text_size = key_size + png_ptr->zbuf_size -
png_ptr->zstream.avail_out;
*(text + text_size) = '\0';
}
(png_uint_32)(png_ptr->zbuf_size - png_ptr->zstream.avail_out
+ key_size + 1));
png_memcpy(text + key_size, png_ptr->zbuf,
png_ptr->zbuf_size - png_ptr->zstream.avail_out);
png_memcpy(text, key, key_size);
text_size = key_size + png_ptr->zbuf_size -
png_ptr->zstream.avail_out;
*(text + text_size) = '\0';
}
else
{
@@ -1246,17 +1217,12 @@ png_push_read_zTXt(png_structp png_ptr, png_infop info_ptr)
text = (png_charp)png_malloc(png_ptr, text_size +
(png_uint_32)(png_ptr->zbuf_size - png_ptr->zstream.avail_out
+ 1));
if (text != (png_charp)NULL)
png_warning(png_ptr, "Malloc of new text block failed");
else
{
png_memcpy(text, tmp, text_size);
png_free(png_ptr, tmp);
png_memcpy(text + text_size, png_ptr->zbuf,
png_ptr->zbuf_size - png_ptr->zstream.avail_out);
text_size += png_ptr->zbuf_size - png_ptr->zstream.avail_out;
*(text + text_size) = '\0';
}
png_memcpy(text, tmp, text_size);
png_free(png_ptr, tmp);
png_memcpy(text + text_size, png_ptr->zbuf,
png_ptr->zbuf_size - png_ptr->zstream.avail_out);
text_size += png_ptr->zbuf_size - png_ptr->zstream.avail_out;
*(text + text_size) = '\0';
}
if (ret != Z_STREAM_END)
{
@@ -1288,30 +1254,26 @@ png_push_read_zTXt(png_structp png_ptr, png_infop info_ptr)
text += key_size;
text_ptr = (png_textp)png_malloc(png_ptr, (png_uint_32)sizeof(png_text));
if (text_ptr == (png_textp)NULL)
png_warning (png_ptr, "Malloc of iTXt failed");
else
{
text_ptr->compression = PNG_TEXT_COMPRESSION_zTXt;
text_ptr->key = key;
text_ptr->compression = PNG_TEXT_COMPRESSION_zTXt;
text_ptr->key = key;
#ifdef PNG_iTXt_SUPPORTED
text_ptr->lang = (char *)NULL;
text_ptr->lang_key = (char *)NULL;
text_ptr->lang = (char *)NULL;
text_ptr->lang_key = (char *)NULL;
#endif
text_ptr->text = text;
text_ptr->text = text;
png_set_text(png_ptr, info_ptr, text_ptr, 1);
png_set_text(png_ptr, info_ptr, text_ptr, 1);
png_free(png_ptr, text_ptr);
}
png_free(png_ptr, key);
png_free(png_ptr, text_ptr);
}
}
#endif
#if defined(PNG_READ_iTXt_SUPPORTED)
void /* PRIVATE */
png_push_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
png_push_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32
length)
{
if (!(png_ptr->mode & PNG_HAVE_IHDR) || (png_ptr->mode & PNG_HAVE_IEND))
{
@@ -1323,7 +1285,7 @@ png_push_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length
#ifdef PNG_MAX_MALLOC_64K
png_ptr->skip_length = 0; /* This may not be necessary */
if (length > (png_uint_32)65535L) /* Can't hold the entire string in memory */
if (length > (png_uint_32)65535L) /* Can't hold entire string in memory */
{
png_warning(png_ptr, "iTXt chunk too large to fit in memory");
png_ptr->skip_length = length - (png_uint_32)65535L;
@@ -1333,16 +1295,11 @@ png_push_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length
png_ptr->current_text = (png_charp)png_malloc(png_ptr,
(png_uint_32)(length+1));
if (png_ptr->current_text == (png_charp)NULL)
png_warning (png_ptr, "malloc of iTXt buffer failed");
else
{
png_ptr->current_text[length] = '\0';
png_ptr->current_text_ptr = png_ptr->current_text;
png_ptr->current_text_size = (png_size_t)length;
png_ptr->current_text_left = (png_size_t)length;
png_ptr->process_mode = PNG_READ_iTXt_MODE;
}
png_ptr->current_text[length] = '\0';
png_ptr->current_text_ptr = png_ptr->current_text;
png_ptr->current_text_size = (png_size_t)length;
png_ptr->current_text_left = (png_size_t)length;
png_ptr->process_mode = PNG_READ_iTXt_MODE;
}
void /* PRIVATE */
@@ -1406,10 +1363,6 @@ png_push_read_iTXt(png_structp png_ptr, png_infop info_ptr)
text++;
text_ptr = (png_textp)png_malloc(png_ptr, (png_uint_32)sizeof(png_text));
if(text_ptr == (png_textp)NULL)
png_warning (png_ptr, "Malloc of iTXt pointer failed");
else
{
text_ptr->compression = comp_flag + 2;
text_ptr->key = key;
text_ptr->lang = lang;
@@ -1421,7 +1374,6 @@ png_push_read_iTXt(png_structp png_ptr, png_infop info_ptr)
png_set_text(png_ptr, info_ptr, text_ptr, 1);
png_free(png_ptr, text_ptr);
}
}
}
#endif
@@ -1431,7 +1383,8 @@ png_push_read_iTXt(png_structp png_ptr, png_infop info_ptr)
* name or a critical chunk), the chunk is (currently) silently ignored.
*/
void /* PRIVATE */
png_push_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
png_push_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32
length)
{
png_uint_32 skip=0;
png_check_chunk_name(png_ptr, png_ptr->chunk_name);
@@ -1442,7 +1395,7 @@ png_push_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 len
if(png_handle_as_unknown(png_ptr, png_ptr->chunk_name) !=
HANDLE_CHUNK_ALWAYS
#if defined(PNG_READ_USER_CHUNKS_SUPPORTED)
&& png_ptr->read_user_chunk_fn == (png_user_chunk_ptr)NULL
&& png_ptr->read_user_chunk_fn == NULL
#endif
)
#endif
@@ -1469,30 +1422,25 @@ png_push_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 len
png_strcpy((png_charp)chunk.name, (png_charp)png_ptr->chunk_name);
chunk.data = (png_bytep)png_malloc(png_ptr, length);
if (chunk.data == (png_bytep)NULL)
png_warning (png_ptr, "Malloc of unknown chunk data failed");
else
{
png_crc_read(png_ptr, chunk.data, length);
chunk.size = length;
png_crc_read(png_ptr, chunk.data, length);
chunk.size = length;
#if defined(PNG_READ_USER_CHUNKS_SUPPORTED)
if(png_ptr->read_user_chunk_fn != (png_user_chunk_ptr)NULL)
{
/* callback to user unknown chunk handler */
if ((*(png_ptr->read_user_chunk_fn)) (png_ptr, &chunk) <= 0)
{
if (!(png_ptr->chunk_name[0] & 0x20))
if(png_handle_as_unknown(png_ptr, png_ptr->chunk_name) !=
HANDLE_CHUNK_ALWAYS)
png_chunk_error(png_ptr, "unknown critical chunk");
}
png_set_unknown_chunks(png_ptr, info_ptr, &chunk, 1);
}
else
#endif
png_set_unknown_chunks(png_ptr, info_ptr, &chunk, 1);
png_free(png_ptr, chunk.data);
if(png_ptr->read_user_chunk_fn != NULL)
{
/* callback to user unknown chunk handler */
if ((*(png_ptr->read_user_chunk_fn)) (png_ptr, &chunk) <= 0)
{
if (!(png_ptr->chunk_name[0] & 0x20))
if(png_handle_as_unknown(png_ptr, png_ptr->chunk_name) !=
HANDLE_CHUNK_ALWAYS)
png_chunk_error(png_ptr, "unknown critical chunk");
}
png_set_unknown_chunks(png_ptr, info_ptr, &chunk, 1);
}
else
#endif
png_set_unknown_chunks(png_ptr, info_ptr, &chunk, 1);
png_free(png_ptr, chunk.data);
}
else
#endif