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Removed some development remarks

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and implemented skipping of zisofs headers larger than 16 bytes.
This commit is contained in:
Thomas Schmitt
2009-04-15 13:22:20 +02:00
parent 00802a1934
commit d87e5721db
6 changed files with 26 additions and 56 deletions
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41
libisofs/filters/zisofs.c
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@@ -507,12 +507,8 @@ int ziso_stream_uncompress(IsoStream *stream, void *buf, size_t desired)
size_t fill = 0;
char *cbuf = buf;
uLongf buf_len;
#ifndef NIX
uint32_t uncompressed_size;
#else
char zisofs_head[16];
#endif
char waste_word[4];
if (stream == NULL) {
return ISO_NULL_POINTER;
@@ -530,8 +526,6 @@ int ziso_stream_uncompress(IsoStream *stream, void *buf, size_t desired)
while (1) {
if (rng->state == 0) {
/* Reading file header */
#ifndef NIX
ret = ziso_parse_zisofs_head(data->orig, &header_size, &bs_log2,
&uncompressed_size, 0);
if (ret < 0)
@@ -539,34 +533,15 @@ int ziso_stream_uncompress(IsoStream *stream, void *buf, size_t desired)
nstd->header_size_div4 = header_size;
header_size *= 4;
data->size = uncompressed_size;
#else
ret = iso_stream_read(data->orig, zisofs_head, 16);
if (ret < 0)
return (rng->error_ret = ret);
header_size = ((unsigned char *) zisofs_head)[12] * 4;
bs_log2 = ((unsigned char *) zisofs_head)[13];
if (ret != 16 || memcmp(zisofs_head, zisofs_magic, 8) != 0 ||
header_size < 16 || bs_log2 < 15 || bs_log2 > 17) {
return (rng->error_ret = ISO_ZISOFS_WRONG_INPUT);
}
data->size = iso_read_lsb(((uint8_t *) zisofs_head) + 8, 4);
nstd->header_size_div4 = header_size / 4;
#endif /* NIX */
nstd->block_size_log2 = bs_log2;
rng->block_size = 1 << bs_log2;
if (header_size > 16) {
/* Skip surplus header bytes */
/* >>> This must be a loop
ret = iso_stream_read(data->orig, zisofs_head, header_size-16);
if (ret < 0)
return (rng->error_ret = ret);
if (ret != header_size - 16)
*/
return (rng->error_ret = ISO_ZISOFS_WRONG_INPUT);
for (i = 16; i < header_size; i += 4) {
/* Skip surplus header words */
ret = iso_stream_read(data->orig, waste_word, 4);
if (ret < 0)
return (rng->error_ret = ret);
if (ret != 4)
return (rng->error_ret = ISO_ZISOFS_WRONG_INPUT);
}
if (desired == 0) {