/* trees.c -- output deflated data using Huffman coding
- * Copyright (C) 1995-1998 Jean-loup Gailly
+ * Copyright (C) 1995-2002 Jean-loup Gailly
* For conditions of distribution and use, see copyright notice in zlib.h
*/
if (static_init_done) return;
+ /* For some embedded targets, global variables are not initialized: */
+ static_l_desc.static_tree = static_ltree;
+ static_l_desc.extra_bits = extra_lbits;
+ static_d_desc.static_tree = static_dtree;
+ static_d_desc.extra_bits = extra_dbits;
+ static_bl_desc.extra_bits = extra_blbits;
+
/* Initialize the mapping length (0..255) -> length code (0..28) */
length = 0;
for (code = 0; code < LENGTH_CODES-1; code++) {
{
tr_static_init();
- s->compressed_len = 0L;
-
s->l_desc.dyn_tree = s->dyn_ltree;
s->l_desc.stat_desc = &static_l_desc;
s->bi_valid = 0;
s->last_eob_len = 8; /* enough lookahead for inflate */
#ifdef __WXDEBUG__
+ s->compressed_len = 0L;
s->bits_sent = 0L;
#endif
/* Check that the bit counts in bl_count are consistent. The last code
* must be all ones.
*/
- Assert (code + bl_count[MAX_BITS]-1 == (ush)(1<<MAX_BITS)-(ush)1,
+ Assert (code + bl_count[MAX_BITS]-1 == (1<<MAX_BITS)-1,
"inconsistent bit counts");
Tracev((stderr,"\ngen_codes: max_code %d ", max_code));
#endif
{
send_bits(s, (STORED_BLOCK<<1)+eof, 3); /* send block type */
+#ifdef __WXDEBUG__
s->compressed_len = (s->compressed_len + 3 + 7) & (ulg)~7L;
s->compressed_len += (stored_len + 4) << 3;
-
+#endif
copy_block(s, buf, (unsigned)stored_len, 1); /* with header */
}
{
send_bits(s, STATIC_TREES<<1, 3);
send_code(s, END_BLOCK, static_ltree);
+#ifdef __WXDEBUG__
s->compressed_len += 10L; /* 3 for block type, 7 for EOB */
+#endif
bi_flush(s);
/* Of the 10 bits for the empty block, we have already sent
* (10 - bi_valid) bits. The lookahead for the last real code (before
if (1 + s->last_eob_len + 10 - s->bi_valid < 9) {
send_bits(s, STATIC_TREES<<1, 3);
send_code(s, END_BLOCK, static_ltree);
+#ifdef __WXDEBUG__
s->compressed_len += 10L;
+#endif
bi_flush(s);
}
s->last_eob_len = 7;
/* ===========================================================================
* 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
- * returns the total compressed length for the file so far.
+ * trees or store, and output the encoded block to the zip file.
*/
#if defined(__VISAGECPP__) /* Visualage can't handle this antiquated interface */
-ulg _tr_flush_block(deflate_state* s, charf* buf, ulg stored_len, int eof)
+void _tr_flush_block(deflate_state* s, charf* buf, ulg stored_len, int eof)
#else
-ulg _tr_flush_block(s, buf, stored_len, eof)
+void _tr_flush_block(s, buf, stored_len, eof)
deflate_state *s;
charf *buf; /* input block, or NULL if too old */
ulg stored_len; /* length of input block */
opt_lenb = static_lenb = stored_len + 5; /* force a stored block */
}
- /* If compression failed and this is the first and last block,
- * and if the .zip file can be seeked (to rewrite the local header),
- * the whole file is transformed into a stored file:
- */
-#ifdef STORED_FILE_OK
-# ifdef FORCE_STORED_FILE
- if (eof && s->compressed_len == 0L) { /* force stored file */
-# else
- if (stored_len <= opt_lenb && eof && s->compressed_len==0L && seekable()) {
-# endif
- /* Since LIT_BUFSIZE <= 2*WSIZE, the input data must be there: */
- if (buf == (charf*)0) error ("block vanished");
-
- copy_block(buf, (unsigned)stored_len, 0); /* without header */
- s->compressed_len = stored_len << 3;
- s->method = STORED;
- } else
-#endif /* STORED_FILE_OK */
-
#ifdef FORCE_STORED
if (buf != (char*)0) { /* force stored block */
#else
#endif
send_bits(s, (STATIC_TREES<<1)+eof, 3);
compress_block(s, (ct_data *)static_ltree, (ct_data *)static_dtree);
+#ifdef __WXDEBUG__
s->compressed_len += 3 + s->static_len;
+#endif
} else {
send_bits(s, (DYN_TREES<<1)+eof, 3);
send_all_trees(s, s->l_desc.max_code+1, s->d_desc.max_code+1,
max_blindex+1);
compress_block(s, (ct_data *)s->dyn_ltree, (ct_data *)s->dyn_dtree);
+#ifdef __WXDEBUG__
s->compressed_len += 3 + s->opt_len;
+#endif
}
Assert (s->compressed_len == s->bits_sent, "bad compressed size");
+ /* The above check is made mod 2^32, for files larger than 512 MB
+ * and uLong implemented on 32 bits.
+ */
init_block(s);
if (eof) {
bi_windup(s);
+#ifdef __WXDEBUG__
s->compressed_len += 7; /* align on byte boundary */
+#endif
}
Tracev((stderr,"\ncomprlen %lu(%lu) ", s->compressed_len>>3,
s->compressed_len-7*eof));
-
- return s->compressed_len >> 3;
}
/* ===========================================================================
} /* literal or match pair ? */
/* Check that the overlay between pending_buf and d_buf+l_buf is ok: */
- Assert((unsigned)s->pending < s->lit_bufsize + 2*lx, "pendingBuf overflow");
+ Assert(s->pending < s->lit_bufsize + 2*lx, "pendingBuf overflow");
} while (lx < s->last_lit);
projects / wxWidgets.git / blobdiff