diff options
Diffstat (limited to 'compat/zlib/trees.c')
| -rw-r--r-- | compat/zlib/trees.c | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/compat/zlib/trees.c b/compat/zlib/trees.c index 8dbdc40..6a523ef 100644 --- a/compat/zlib/trees.c +++ b/compat/zlib/trees.c @@ -1,5 +1,5 @@ /* trees.c -- output deflated data using Huffman coding - * Copyright (C) 1995-2021 Jean-loup Gailly + * Copyright (C) 1995-2024 Jean-loup Gailly * detect_data_type() function provided freely by Cosmin Truta, 2006 * For conditions of distribution and use, see copyright notice in zlib.h */ @@ -899,14 +899,19 @@ local void compress_block(deflate_state *s, const ct_data *ltree, const ct_data *dtree) { unsigned dist; /* distance of matched string */ int lc; /* match length or unmatched char (if dist == 0) */ - unsigned sx = 0; /* running index in sym_buf */ + unsigned sx = 0; /* running index in symbol buffers */ unsigned code; /* the code to send */ int extra; /* number of extra bits to send */ if (s->sym_next != 0) do { +#ifdef LIT_MEM + dist = s->d_buf[sx]; + lc = s->l_buf[sx++]; +#else dist = s->sym_buf[sx++] & 0xff; dist += (unsigned)(s->sym_buf[sx++] & 0xff) << 8; lc = s->sym_buf[sx++]; +#endif if (dist == 0) { send_code(s, lc, ltree); /* send a literal byte */ Tracecv(isgraph(lc), (stderr," '%c' ", lc)); @@ -931,8 +936,12 @@ local void compress_block(deflate_state *s, const ct_data *ltree, } } /* literal or match pair ? */ - /* Check that the overlay between pending_buf and sym_buf is ok: */ + /* Check for no overlay of pending_buf on needed symbols */ +#ifdef LIT_MEM + Assert(s->pending < 2 * (s->lit_bufsize + sx), "pendingBuf overflow"); +#else Assert(s->pending < s->lit_bufsize + sx, "pendingBuf overflow"); +#endif } while (sx < s->sym_next); @@ -1082,9 +1091,14 @@ void ZLIB_INTERNAL _tr_flush_block(deflate_state *s, charf *buf, * the current block must be flushed. */ int ZLIB_INTERNAL _tr_tally(deflate_state *s, unsigned dist, unsigned lc) { +#ifdef LIT_MEM + s->d_buf[s->sym_next] = (ush)dist; + s->l_buf[s->sym_next++] = (uch)lc; +#else s->sym_buf[s->sym_next++] = (uch)dist; s->sym_buf[s->sym_next++] = (uch)(dist >> 8); s->sym_buf[s->sym_next++] = (uch)lc; +#endif if (dist == 0) { /* lc is the unmatched char */ s->dyn_ltree[lc].Freq++; |