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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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205
pngrutil.c
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@@ -1,7 +1,7 @@
/* pngrutil.c - utilities to read a PNG file
*
* 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)
@@ -201,19 +201,15 @@ png_decompress_chunk(png_structp png_ptr, int comp_type,
{
text_size = prefix_size + sizeof(msg) + 1;
text = (png_charp)png_malloc(png_ptr, text_size);
if (text != NULL)
png_memcpy(text, chunkdata, prefix_size);
png_memcpy(text, chunkdata, prefix_size);
}
if (text != NULL)
{
text[text_size - 1] = 0x00;
text[text_size - 1] = 0x00;
/* Copy what we can of the error message into the text chunk */
text_size = (png_size_t)(chunklength - (text - chunkdata) - 1);
text_size = sizeof(msg) > text_size ? text_size : sizeof(msg);
png_memcpy(text + prefix_size, msg, text_size + 1);
}
/* Copy what we can of the error message into the text chunk */
text_size = (png_size_t)(chunklength - (text - chunkdata) - 1);
text_size = sizeof(msg) > text_size ? text_size : sizeof(msg);
png_memcpy(text + prefix_size, msg, text_size + 1);
break;
}
if (!png_ptr->zstream.avail_out || ret == Z_STREAM_END)
@@ -223,13 +219,10 @@ png_decompress_chunk(png_structp png_ptr, int comp_type,
text_size = prefix_size +
png_ptr->zbuf_size - png_ptr->zstream.avail_out;
text = (png_charp)png_malloc(png_ptr, text_size + 1);
if (text != NULL)
{
png_memcpy(text + prefix_size, png_ptr->zbuf,
text_size - prefix_size);
png_memcpy(text, chunkdata, prefix_size);
*(text + text_size) = 0x00;
}
png_memcpy(text + prefix_size, png_ptr->zbuf,
text_size - prefix_size);
png_memcpy(text, chunkdata, prefix_size);
*(text + text_size) = 0x00;
}
else
{
@@ -238,20 +231,12 @@ png_decompress_chunk(png_structp png_ptr, int comp_type,
tmp = text;
text = (png_charp)png_malloc(png_ptr, (png_uint_32)(text_size +
png_ptr->zbuf_size - png_ptr->zstream.avail_out + 1));
if (text != NULL)
{
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) = 0x00;
}
else
{
png_warning (png_ptr, "Could not malloc text buffer");
text=tmp;
}
}
if (ret == Z_STREAM_END)
break;
@@ -285,13 +270,9 @@ png_decompress_chunk(png_structp png_ptr, int comp_type,
if (text == NULL)
{
text = (png_charp)png_malloc(png_ptr, text_size+1);
if (text != NULL)
png_memcpy(text, chunkdata, prefix_size);
else
png_warning(png_ptr, "Could not malloc text chunkdata");
png_memcpy(text, chunkdata, prefix_size);
}
if (text != NULL)
*(text + text_size) = 0x00;
*(text + text_size) = 0x00;
}
inflateReset(&png_ptr->zstream);
@@ -1002,14 +983,7 @@ png_handle_iCCP(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
chunkdata = (png_charp)png_malloc(png_ptr, length + 1);
slength = (png_size_t)length;
if (chunkdata != (png_charp)NULL)
png_crc_read(png_ptr, (png_bytep)chunkdata, slength);
else
{
png_warning(png_ptr, "Could not allocate memory for iCCP chunk");
png_crc_finish(png_ptr, slength);
return;
}
png_crc_read(png_ptr, (png_bytep)chunkdata, slength);
if (png_crc_finish(png_ptr, skip))
{
@@ -1105,16 +1079,8 @@ png_handle_sPLT(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
#endif
chunkdata = (png_bytep)png_malloc(png_ptr, length + 1);
if (chunkdata != (png_bytep)NULL)
{
slength = (png_size_t)length;
png_crc_read(png_ptr, (png_bytep)chunkdata, slength);
}
else
{
png_warning(png_ptr, "Could not allocate memory for sPLT chunk");
skip = (png_size_t)length;
}
slength = (png_size_t)length;
png_crc_read(png_ptr, (png_bytep)chunkdata, slength);
if (png_crc_finish(png_ptr, skip))
{
@@ -1151,12 +1117,6 @@ png_handle_sPLT(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
new_palette.nentries = data_length / entry_size;
new_palette.entries = (png_sPLT_entryp)png_malloc(
png_ptr, new_palette.nentries * sizeof(png_sPLT_entry));
if (new_palette.entries == (png_sPLT_entryp)NULL)
{
png_free(png_ptr, chunkdata);
png_warning (png_ptr, "Could not allocate sPLT entries");
return;
}
#ifndef PNG_NO_POINTER_INDEXING
for (i = 0; i < new_palette.nentries; i++)
@@ -1566,12 +1526,6 @@ png_handle_pCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
png_debug1(2, "Allocating and reading pCAL chunk data (%lu bytes)\n",
length + 1);
purpose = (png_charp)png_malloc(png_ptr, length + 1);
if (purpose == (png_charp)NULL)
{
png_warning (png_ptr, "Could not allocate memory for pCAL purpose");
png_crc_finish(png_ptr, length);
return;
}
slength = (png_size_t)length;
png_crc_read(png_ptr, (png_bytep)purpose, slength);
@@ -1628,11 +1582,6 @@ png_handle_pCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
png_debug(3, "Allocating pCAL parameters array\n");
params = (png_charpp)png_malloc(png_ptr, (png_uint_32)(nparams
*sizeof(png_charp))) ;
if (params == (png_charpp)NULL)
{
png_warning (png_ptr, "Could not allocate pCAL parameters array");
nparams=0;
}
/* Get pointers to the start of each parameter string. */
for (i = 0; i < (int)nparams; i++)
@@ -1697,12 +1646,6 @@ png_handle_sCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
png_debug1(2, "Allocating and reading sCAL chunk data (%lu bytes)\n",
length + 1);
buffer = (png_charp)png_malloc(png_ptr, length + 1);
if (buffer == (png_charp)NULL)
{
png_warning (png_ptr, "Could not allocate memory for sCAL buffer");
png_crc_finish(png_ptr, length);
return;
}
slength = (png_size_t)length;
png_crc_read(png_ptr, (png_bytep)buffer, slength);
@@ -1726,8 +1669,7 @@ png_handle_sCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
#else
#ifdef PNG_FIXED_POINT_SUPPORTED
swidth = (png_charp)png_malloc(png_ptr, png_strlen(ep) + 1);
if (swidth != (png_charp)NULL)
png_memcpy(swidth, ep, (png_size_t)png_strlen(ep));
png_memcpy(swidth, ep, (png_size_t)png_strlen(ep));
#endif
#endif
@@ -1745,8 +1687,7 @@ png_handle_sCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
#else
#ifdef PNG_FIXED_POINT_SUPPORTED
sheight = (png_charp)png_malloc(png_ptr, png_strlen(ep) + 1);
if (sheight != (png_charp)NULL)
png_memcpy(sheight, ep, (png_size_t)png_strlen(ep));
png_memcpy(sheight, ep, (png_size_t)png_strlen(ep));
#endif
#endif
@@ -1855,14 +1796,7 @@ png_handle_tEXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
key = (png_charp)png_malloc(png_ptr, length + 1);
slength = (png_size_t)length;
if (key == (png_charp)NULL)
{
png_warning (png_ptr, "Could not allocate memory for tEXt chunk");
png_crc_finish(png_ptr, slength);
return;
}
else
png_crc_read(png_ptr, (png_bytep)key, slength);
png_crc_read(png_ptr, (png_bytep)key, slength);
if (png_crc_finish(png_ptr, skip))
{
@@ -1879,8 +1813,6 @@ png_handle_tEXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
text++;
text_ptr = (png_textp)png_malloc(png_ptr, (png_uint_32)sizeof(png_text));
if (text_ptr != (png_textp)NULL)
{
text_ptr->compression = PNG_TEXT_COMPRESSION_NONE;
text_ptr->key = key;
#ifdef PNG_iTXt_SUPPORTED
@@ -1893,11 +1825,8 @@ png_handle_tEXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
png_set_text(png_ptr, info_ptr, text_ptr, 1);
png_free(png_ptr, text_ptr);
}
else
png_warning(png_ptr, "Could not allocate iTXt pointer");
png_free(png_ptr, key);
png_free(png_ptr, text_ptr);
}
#endif
@@ -1931,17 +1860,8 @@ png_handle_zTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
#endif
chunkdata = (png_charp)png_malloc(png_ptr, length + 1);
if (chunkdata != (png_charp)NULL)
{
slength = (png_size_t)length;
png_crc_read(png_ptr, (png_bytep)chunkdata, slength);
}
else
{
png_warning (png_ptr, "Could not allocate memory for zTXt chunk data");
png_crc_finish(png_ptr, length);
return;
}
png_crc_read(png_ptr, (png_bytep)chunkdata, slength);
if (png_crc_finish(png_ptr, 0))
{
png_free(png_ptr, chunkdata);
@@ -1975,24 +1895,19 @@ png_handle_zTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
(png_size_t)length, prefix_len, &data_len);
text_ptr = (png_textp)png_malloc(png_ptr, (png_uint_32)sizeof(png_text));
if (text_ptr != (png_textp)NULL)
{
text_ptr->compression = comp_type;
text_ptr->key = chunkdata;
text_ptr->compression = comp_type;
text_ptr->key = chunkdata;
#ifdef PNG_iTXt_SUPPORTED
text_ptr->lang = NULL;
text_ptr->lang_key = NULL;
text_ptr->itxt_length = 0;
text_ptr->lang = NULL;
text_ptr->lang_key = NULL;
text_ptr->itxt_length = 0;
#endif
text_ptr->text = chunkdata + prefix_len;
text_ptr->text_length = data_len;
text_ptr->text = chunkdata + prefix_len;
text_ptr->text_length = data_len;
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);
}
else
png_warning (png_ptr, "Could not allocate memory for zTXt data");
png_free(png_ptr, text_ptr);
png_free(png_ptr, chunkdata);
}
#endif
@@ -2029,17 +1944,8 @@ png_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
#endif
chunkdata = (png_charp)png_malloc(png_ptr, length + 1);
if (chunkdata != (png_charp)NULL)
{
slength = (png_size_t)length;
png_crc_read(png_ptr, (png_bytep)chunkdata, slength);
}
else
{
png_warning (png_ptr, "Could not allocate memory for iTXt chunk data");
png_crc_finish(png_ptr, length);
return;
}
slength = (png_size_t)length;
png_crc_read(png_ptr, (png_bytep)chunkdata, slength);
if (png_crc_finish(png_ptr, 0))
{
png_free(png_ptr, chunkdata);
@@ -2084,22 +1990,17 @@ png_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
else
data_len=png_strlen(chunkdata + prefix_len);
text_ptr = (png_textp)png_malloc(png_ptr, (png_uint_32)sizeof(png_text));
if (text_ptr != (png_textp)NULL)
{
text_ptr->compression = (int)comp_flag + 1;
text_ptr->lang_key = chunkdata+(lang_key-key);
text_ptr->lang = chunkdata+(lang-key);
text_ptr->itxt_length = data_len;
text_ptr->text_length = 0;
text_ptr->key = chunkdata;
text_ptr->text = chunkdata + prefix_len;
text_ptr->compression = (int)comp_flag + 1;
text_ptr->lang_key = chunkdata+(lang_key-key);
text_ptr->lang = chunkdata+(lang-key);
text_ptr->itxt_length = data_len;
text_ptr->text_length = 0;
text_ptr->key = chunkdata;
text_ptr->text = chunkdata + prefix_len;
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);
}
else
png_warning (png_ptr, "Could not allocate memory for iTXt chunk data");
png_free(png_ptr, text_ptr);
png_free(png_ptr, chunkdata);
}
#endif
@@ -2133,7 +2034,7 @@ png_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
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
@@ -2155,19 +2056,10 @@ png_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
#endif
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)
{
chunk.size = (png_size_t)length;
png_crc_read(png_ptr, (png_bytep)chunk.data, length);
}
else
{
png_warning (png_ptr, "Could not allocate memory for iTXt chunk data");
png_crc_finish(png_ptr, length);
return;
}
chunk.size = (png_size_t)length;
png_crc_read(png_ptr, (png_bytep)chunk.data, length);
#if defined(PNG_READ_USER_CHUNKS_SUPPORTED)
if(png_ptr->read_user_chunk_fn != (png_user_chunk_ptr)NULL)
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)
@@ -3072,8 +2964,6 @@ defined(PNG_USER_TRANSFORM_PTR_SUPPORTED)
png_error(png_ptr, "This image requires a row greater than 64KB");
#endif
png_ptr->row_buf = (png_bytep)png_malloc(png_ptr, row_bytes);
if (png_ptr->row_buf == (png_bytep)NULL)
png_error (png_ptr, "Could not allocate memory for row buffer");
png_ptr->row_buf_size = row_bytes;
#ifdef PNG_MAX_MALLOC_64K
@@ -3082,11 +2972,6 @@ defined(PNG_USER_TRANSFORM_PTR_SUPPORTED)
#endif
png_ptr->prev_row = (png_bytep)png_malloc(png_ptr, (png_uint_32)(
png_ptr->rowbytes + 1));
if (png_ptr->prev_row == (png_bytep)NULL)
{
png_free (png_ptr, png_ptr->row_buf);
png_error (png_ptr, "Could not allocate memory for previous row buffer");
}
png_memset_check(png_ptr, png_ptr->prev_row, 0, png_ptr->rowbytes + 1);