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zlib 0.9

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This commit is contained in:
Mark Adler
2011-09-09 23:06:52 -07:00
parent 4ca984fb44
commit 64b2e89203
23 changed files with 783 additions and 200 deletions
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36
trees.c
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@@ -29,7 +29,7 @@
* Addison-Wesley, 1983. ISBN 0-201-06672-6.
*/
/* $Id: trees.c,v 1.3 1995/04/29 13:49:46 jloup Exp $ */
/* $Id: trees.c,v 1.4 1995/05/01 16:53:44 jloup Exp $ */
#include "deflate.h"
@@ -722,6 +722,22 @@ local void send_all_trees(s, lcodes, dcodes, blcodes)
Tracev((stderr, "\ndist tree: sent %ld", s->bits_sent));
}
/* ===========================================================================
* Send a stored block
*/
void ct_stored_block(s, buf, stored_len, eof)
deflate_state *s;
char *buf; /* input block */
ulg stored_len; /* length of input block */
int eof; /* true if this is the last block for a file */
{
send_bits(s, (STORED_BLOCK<<1)+eof, 3); /* send block type */
s->compressed_len = (s->compressed_len + 3 + 7) & ~7L;
s->compressed_len += (stored_len + 4) << 3;
copy_block(s, buf, (unsigned)stored_len, 1); /* with header */
}
/* ===========================================================================
* Determine the best encoding for the current block: dynamic trees, static
* trees or store, and output the encoded block to the zip file. This function
@@ -771,8 +787,8 @@ ulg ct_flush_block(s, buf, stored_len, eof)
* the whole file is transformed into a stored file:
*/
#ifdef STORED_FILE_OK
# ifdef FORCE_METHOD
if (level == 1 && eof && compressed_len == 0L) { /* force stored file */
# ifdef FORCE_STORED_FILE
if (eof && compressed_len == 0L) { /* force stored file */
# else
if (stored_len <= opt_lenb && eof && s->compressed_len==0L && seekable()) {
# endif
@@ -785,8 +801,8 @@ ulg ct_flush_block(s, buf, stored_len, eof)
} else
#endif /* STORED_FILE_OK */
#ifdef FORCE_METHOD
if (level == 2 && buf != (char*)0) { /* force stored block */
#ifdef FORCE_STORED
if (buf != (char*)0) { /* force stored block */
#else
if (stored_len+4 <= opt_lenb && buf != (char*)0) {
/* 4: two words for the lengths */
@@ -797,14 +813,10 @@ ulg ct_flush_block(s, buf, stored_len, eof)
* successful. If LIT_BUFSIZE <= WSIZE, it is never too late to
* transform a block into a stored block.
*/
send_bits(s, (STORED_BLOCK<<1)+eof, 3); /* send block type */
s->compressed_len = (s->compressed_len + 3 + 7) & ~7L;
s->compressed_len += (stored_len + 4) << 3;
ct_stored_block(s, buf, stored_len, eof);
copy_block(s, buf, (unsigned)stored_len, 1); /* with header */
#ifdef FORCE_METHOD
} else if (level == 3) { /* force static trees */
#ifdef FORCE_STATIC
} else if (static_lenb >= 0) { /* force static trees */
#else
} else if (static_lenb == opt_lenb) {
#endif