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Added additional handlers for compressed swf files, which require

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entire file to be downloaded for successful decompression.
This commit is contained in:
Ilia Alshanetsky 2002-09-18 20:37:24 +00:00
parent 7dfa439185
commit 869c42a511
1 changed files with 49 additions and 8 deletions
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57
ext/standard/image.c
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@ -208,8 +208,10 @@ static struct gfxinfo *php_handle_swc(php_stream * stream TSRMLS_DC)
long bits;
unsigned char a[64];
unsigned long len = 64;
char *b;
unsigned long len=64, szlength;
int factor=1,maxfactor=16;
int slength, status=0;
char *b, *buf=NULL, *bufz=NULL;
b = ecalloc (1, len + 1);
@ -217,13 +219,52 @@ static struct gfxinfo *php_handle_swc(php_stream * stream TSRMLS_DC)
php_stream_seek(stream, 5, SEEK_CUR);
php_stream_read(stream, a, sizeof(a)); /* fread(a, sizeof(a), 1, fp); */
uncompress (b, &len, a, sizeof(a));
if (uncompress(b, &len, a, sizeof(a)) != Z_OK) {
/* failed to decompress the file, will try reading the rest of the file */
php_stream_seek(stream, 8, SEEK_SET);
slength = php_stream_copy_to_mem(stream, &bufz, PHP_STREAM_COPY_ALL, 0);
/*
* zlib::uncompress() wants to know the output data length
* if none was given as a parameter
* we try from input length * 2 up to input length * 2^8
* doubling it whenever it wasn't big enough
* that should be eneugh for all real life cases
*/
do {
szlength=slength*(1<<factor++);
buf = (char *) erealloc(buf,szlength);
if (!buf) {
status = 1;
break;
}
status = uncompress(buf, &szlength, bufz, slength);
} while ((status==Z_BUF_ERROR)&&(factor<maxfactor));
if (bufz) {
pefree(bufz, 0);
}
if (status == Z_OK) {
memcpy(b, buf, len);
}
if (buf) {
efree(buf);
}
}
bits = php_swf_get_bits (b, 0, 5);
result->width = (php_swf_get_bits (b, 5 + bits, bits) -
php_swf_get_bits (b, 5, bits)) / 20;
result->height = (php_swf_get_bits (b, 5 + (3 * bits), bits) -
php_swf_get_bits (b, 5 + (2 * bits), bits)) / 20;
if (!status) {
bits = php_swf_get_bits (b, 0, 5);
result->width = (php_swf_get_bits (b, 5 + bits, bits) -
php_swf_get_bits (b, 5, bits)) / 20;
result->height = (php_swf_get_bits (b, 5 + (3 * bits), bits) -
php_swf_get_bits (b, 5 + (2 * bits), bits)) / 20;
} else {
result->width = result->height = 0;
}
efree (b);
result->bits = 0;
result->channels = 0;