diff options
Diffstat (limited to 'src/3rdparty/zlib/src/deflate.c')
| -rw-r--r-- | src/3rdparty/zlib/src/deflate.c | 218 |
1 files changed, 112 insertions, 106 deletions
diff --git a/src/3rdparty/zlib/src/deflate.c b/src/3rdparty/zlib/src/deflate.c index 799fb93cc0..4a689db359 100644 --- a/src/3rdparty/zlib/src/deflate.c +++ b/src/3rdparty/zlib/src/deflate.c @@ -52,7 +52,7 @@ #include "deflate.h" const char deflate_copyright[] = - " deflate 1.2.12 Copyright 1995-2022 Jean-loup Gailly and Mark Adler "; + " deflate 1.2.13 Copyright 1995-2022 Jean-loup Gailly and Mark Adler "; /* If you use the zlib library in a product, an acknowledgment is welcome in the documentation of your product. If for some reason you cannot @@ -87,13 +87,7 @@ local void lm_init OF((deflate_state *s)); local void putShortMSB OF((deflate_state *s, uInt b)); local void flush_pending OF((z_streamp strm)); local unsigned read_buf OF((z_streamp strm, Bytef *buf, unsigned size)); -#ifdef ASMV -# pragma message("Assembler code may have bugs -- use at your own risk") - void match_init OF((void)); /* asm code initialization */ - uInt longest_match OF((deflate_state *s, IPos cur_match)); -#else local uInt longest_match OF((deflate_state *s, IPos cur_match)); -#endif #ifdef ZLIB_DEBUG local void check_match OF((deflate_state *s, IPos start, IPos match, @@ -160,7 +154,7 @@ local const config configuration_table[10] = { * characters, so that a running hash key can be computed from the previous * key instead of complete recalculation each time. */ -#define UPDATE_HASH(s,h,c) (h = (((h)<<s->hash_shift) ^ (c)) & s->hash_mask) +#define UPDATE_HASH(s,h,c) (h = (((h) << s->hash_shift) ^ (c)) & s->hash_mask) /* =========================================================================== @@ -191,9 +185,9 @@ local const config configuration_table[10] = { */ #define CLEAR_HASH(s) \ do { \ - s->head[s->hash_size-1] = NIL; \ + s->head[s->hash_size - 1] = NIL; \ zmemzero((Bytef *)s->head, \ - (unsigned)(s->hash_size-1)*sizeof(*s->head)); \ + (unsigned)(s->hash_size - 1)*sizeof(*s->head)); \ } while (0) /* =========================================================================== @@ -285,6 +279,8 @@ int ZEXPORT deflateInit2_(strm, level, method, windowBits, memLevel, strategy, if (windowBits < 0) { /* suppress zlib wrapper */ wrap = 0; + if (windowBits < -15) + return Z_STREAM_ERROR; windowBits = -windowBits; } #ifdef GZIP @@ -314,7 +310,7 @@ int ZEXPORT deflateInit2_(strm, level, method, windowBits, memLevel, strategy, s->hash_bits = (uInt)memLevel + 7; s->hash_size = 1 << s->hash_bits; s->hash_mask = s->hash_size - 1; - s->hash_shift = ((s->hash_bits+MIN_MATCH-1)/MIN_MATCH); + s->hash_shift = ((s->hash_bits + MIN_MATCH-1) / MIN_MATCH); s->window = (Bytef *) ZALLOC(strm, s->w_size, 2*sizeof(Byte)); s->prev = (Posf *) ZALLOC(strm, s->w_size, sizeof(Pos)); @@ -340,11 +336,11 @@ int ZEXPORT deflateInit2_(strm, level, method, windowBits, memLevel, strategy, * sym_buf value to read moves forward three bytes. From that symbol, up to * 31 bits are written to pending_buf. The closest the written pending_buf * bits gets to the next sym_buf symbol to read is just before the last - * code is written. At that time, 31*(n-2) bits have been written, just - * after 24*(n-2) bits have been consumed from sym_buf. sym_buf starts at - * 8*n bits into pending_buf. (Note that the symbol buffer fills when n-1 + * code is written. At that time, 31*(n - 2) bits have been written, just + * after 24*(n - 2) bits have been consumed from sym_buf. sym_buf starts at + * 8*n bits into pending_buf. (Note that the symbol buffer fills when n - 1 * symbols are written.) The closest the writing gets to what is unread is - * then n+14 bits. Here n is lit_bufsize, which is 16384 by default, and + * then n + 14 bits. Here n is lit_bufsize, which is 16384 by default, and * can range from 128 to 32768. * * Therefore, at a minimum, there are 142 bits of space between what is @@ -390,7 +386,7 @@ int ZEXPORT deflateInit2_(strm, level, method, windowBits, memLevel, strategy, /* ========================================================================= * Check for a valid deflate stream state. Return 0 if ok, 1 if not. */ -local int deflateStateCheck (strm) +local int deflateStateCheck(strm) z_streamp strm; { deflate_state *s; @@ -413,7 +409,7 @@ local int deflateStateCheck (strm) } /* ========================================================================= */ -int ZEXPORT deflateSetDictionary (strm, dictionary, dictLength) +int ZEXPORT deflateSetDictionary(strm, dictionary, dictLength) z_streamp strm; const Bytef *dictionary; uInt dictLength; @@ -482,7 +478,7 @@ int ZEXPORT deflateSetDictionary (strm, dictionary, dictLength) } /* ========================================================================= */ -int ZEXPORT deflateGetDictionary (strm, dictionary, dictLength) +int ZEXPORT deflateGetDictionary(strm, dictionary, dictLength) z_streamp strm; Bytef *dictionary; uInt *dictLength; @@ -504,7 +500,7 @@ int ZEXPORT deflateGetDictionary (strm, dictionary, dictLength) } /* ========================================================================= */ -int ZEXPORT deflateResetKeep (strm) +int ZEXPORT deflateResetKeep(strm) z_streamp strm; { deflate_state *s; @@ -542,7 +538,7 @@ int ZEXPORT deflateResetKeep (strm) } /* ========================================================================= */ -int ZEXPORT deflateReset (strm) +int ZEXPORT deflateReset(strm) z_streamp strm; { int ret; @@ -554,7 +550,7 @@ int ZEXPORT deflateReset (strm) } /* ========================================================================= */ -int ZEXPORT deflateSetHeader (strm, head) +int ZEXPORT deflateSetHeader(strm, head) z_streamp strm; gz_headerp head; { @@ -565,7 +561,7 @@ int ZEXPORT deflateSetHeader (strm, head) } /* ========================================================================= */ -int ZEXPORT deflatePending (strm, pending, bits) +int ZEXPORT deflatePending(strm, pending, bits) unsigned *pending; int *bits; z_streamp strm; @@ -579,7 +575,7 @@ int ZEXPORT deflatePending (strm, pending, bits) } /* ========================================================================= */ -int ZEXPORT deflatePrime (strm, bits, value) +int ZEXPORT deflatePrime(strm, bits, value) z_streamp strm; int bits; int value; @@ -674,36 +670,50 @@ int ZEXPORT deflateTune(strm, good_length, max_lazy, nice_length, max_chain) } /* ========================================================================= - * For the default windowBits of 15 and memLevel of 8, this function returns - * a close to exact, as well as small, upper bound on the compressed size. - * They are coded as constants here for a reason--if the #define's are - * changed, then this function needs to be changed as well. The return - * value for 15 and 8 only works for those exact settings. + * For the default windowBits of 15 and memLevel of 8, this function returns a + * close to exact, as well as small, upper bound on the compressed size. This + * is an expansion of ~0.03%, plus a small constant. + * + * For any setting other than those defaults for windowBits and memLevel, one + * of two worst case bounds is returned. This is at most an expansion of ~4% or + * ~13%, plus a small constant. * - * For any setting other than those defaults for windowBits and memLevel, - * the value returned is a conservative worst case for the maximum expansion - * resulting from using fixed blocks instead of stored blocks, which deflate - * can emit on compressed data for some combinations of the parameters. + * Both the 0.03% and 4% derive from the overhead of stored blocks. The first + * one is for stored blocks of 16383 bytes (memLevel == 8), whereas the second + * is for stored blocks of 127 bytes (the worst case memLevel == 1). The + * expansion results from five bytes of header for each stored block. * - * This function could be more sophisticated to provide closer upper bounds for - * every combination of windowBits and memLevel. But even the conservative - * upper bound of about 14% expansion does not seem onerous for output buffer - * allocation. + * The larger expansion of 13% results from a window size less than or equal to + * the symbols buffer size (windowBits <= memLevel + 7). In that case some of + * the data being compressed may have slid out of the sliding window, impeding + * a stored block from being emitted. Then the only choice is a fixed or + * dynamic block, where a fixed block limits the maximum expansion to 9 bits + * per 8-bit byte, plus 10 bits for every block. The smallest block size for + * which this can occur is 255 (memLevel == 2). + * + * Shifts are used to approximate divisions, for speed. */ uLong ZEXPORT deflateBound(strm, sourceLen) z_streamp strm; uLong sourceLen; { deflate_state *s; - uLong complen, wraplen; + uLong fixedlen, storelen, wraplen; + + /* upper bound for fixed blocks with 9-bit literals and length 255 + (memLevel == 2, which is the lowest that may not use stored blocks) -- + ~13% overhead plus a small constant */ + fixedlen = sourceLen + (sourceLen >> 3) + (sourceLen >> 8) + + (sourceLen >> 9) + 4; - /* conservative upper bound for compressed data */ - complen = sourceLen + - ((sourceLen + 7) >> 3) + ((sourceLen + 63) >> 6) + 5; + /* upper bound for stored blocks with length 127 (memLevel == 1) -- + ~4% overhead plus a small constant */ + storelen = sourceLen + (sourceLen >> 5) + (sourceLen >> 7) + + (sourceLen >> 11) + 7; - /* if can't get parameters, return conservative bound plus zlib wrapper */ + /* if can't get parameters, return larger bound plus a zlib wrapper */ if (deflateStateCheck(strm)) - return complen + 6; + return (fixedlen > storelen ? fixedlen : storelen) + 6; /* compute wrapper length */ s = strm->state; @@ -740,11 +750,12 @@ uLong ZEXPORT deflateBound(strm, sourceLen) wraplen = 6; } - /* if not default parameters, return conservative bound */ + /* if not default parameters, return one of the conservative bounds */ if (s->w_bits != 15 || s->hash_bits != 8 + 7) - return complen + wraplen; + return (s->w_bits <= s->hash_bits ? fixedlen : storelen) + wraplen; - /* default settings: return tight bound for that case */ + /* default settings: return tight bound for that case -- ~0.03% overhead + plus a small constant */ return sourceLen + (sourceLen >> 12) + (sourceLen >> 14) + (sourceLen >> 25) + 13 - 6 + wraplen; } @@ -754,7 +765,7 @@ uLong ZEXPORT deflateBound(strm, sourceLen) * IN assertion: the stream state is correct and there is enough room in * pending_buf. */ -local void putShortMSB (s, b) +local void putShortMSB(s, b) deflate_state *s; uInt b; { @@ -801,7 +812,7 @@ local void flush_pending(strm) } while (0) /* ========================================================================= */ -int ZEXPORT deflate (strm, flush) +int ZEXPORT deflate(strm, flush) z_streamp strm; int flush; { @@ -856,7 +867,7 @@ int ZEXPORT deflate (strm, flush) s->status = BUSY_STATE; if (s->status == INIT_STATE) { /* zlib header */ - uInt header = (Z_DEFLATED + ((s->w_bits-8)<<4)) << 8; + uInt header = (Z_DEFLATED + ((s->w_bits - 8) << 4)) << 8; uInt level_flags; if (s->strategy >= Z_HUFFMAN_ONLY || s->level < 2) @@ -1116,7 +1127,7 @@ int ZEXPORT deflate (strm, flush) } /* ========================================================================= */ -int ZEXPORT deflateEnd (strm) +int ZEXPORT deflateEnd(strm) z_streamp strm; { int status; @@ -1142,7 +1153,7 @@ int ZEXPORT deflateEnd (strm) * To simplify the source, this is not supported for 16-bit MSDOS (which * doesn't have enough memory anyway to duplicate compression states). */ -int ZEXPORT deflateCopy (dest, source) +int ZEXPORT deflateCopy(dest, source) z_streamp dest; z_streamp source; { @@ -1231,7 +1242,7 @@ local unsigned read_buf(strm, buf, size) /* =========================================================================== * Initialize the "longest match" routines for a new zlib stream */ -local void lm_init (s) +local void lm_init(s) deflate_state *s; { s->window_size = (ulg)2L*s->w_size; @@ -1252,11 +1263,6 @@ local void lm_init (s) s->match_length = s->prev_length = MIN_MATCH-1; s->match_available = 0; s->ins_h = 0; -#ifndef FASTEST -#ifdef ASMV - match_init(); /* initialize the asm code */ -#endif -#endif } #ifndef FASTEST @@ -1269,10 +1275,6 @@ local void lm_init (s) * string (strstart) and its distance is <= MAX_DIST, and prev_length >= 1 * OUT assertion: the match length is not greater than s->lookahead. */ -#ifndef ASMV -/* For 80x86 and 680x0, an optimized version will be provided in match.asm or - * match.S. The code will be functionally equivalent. - */ local uInt longest_match(s, cur_match) deflate_state *s; IPos cur_match; /* current match */ @@ -1297,10 +1299,10 @@ local uInt longest_match(s, cur_match) */ register Bytef *strend = s->window + s->strstart + MAX_MATCH - 1; register ush scan_start = *(ushf*)scan; - register ush scan_end = *(ushf*)(scan+best_len-1); + register ush scan_end = *(ushf*)(scan + best_len - 1); #else register Bytef *strend = s->window + s->strstart + MAX_MATCH; - register Byte scan_end1 = scan[best_len-1]; + register Byte scan_end1 = scan[best_len - 1]; register Byte scan_end = scan[best_len]; #endif @@ -1318,7 +1320,8 @@ local uInt longest_match(s, cur_match) */ if ((uInt)nice_match > s->lookahead) nice_match = (int)s->lookahead; - Assert((ulg)s->strstart <= s->window_size-MIN_LOOKAHEAD, "need lookahead"); + Assert((ulg)s->strstart <= s->window_size - MIN_LOOKAHEAD, + "need lookahead"); do { Assert(cur_match < s->strstart, "no future"); @@ -1336,43 +1339,44 @@ local uInt longest_match(s, cur_match) /* This code assumes sizeof(unsigned short) == 2. Do not use * UNALIGNED_OK if your compiler uses a different size. */ - if (*(ushf*)(match+best_len-1) != scan_end || + if (*(ushf*)(match + best_len - 1) != scan_end || *(ushf*)match != scan_start) continue; /* It is not necessary to compare scan[2] and match[2] since they are * always equal when the other bytes match, given that the hash keys * are equal and that HASH_BITS >= 8. Compare 2 bytes at a time at - * strstart+3, +5, ... up to strstart+257. We check for insufficient + * strstart + 3, + 5, up to strstart + 257. We check for insufficient * lookahead only every 4th comparison; the 128th check will be made - * at strstart+257. If MAX_MATCH-2 is not a multiple of 8, it is + * at strstart + 257. If MAX_MATCH-2 is not a multiple of 8, it is * necessary to put more guard bytes at the end of the window, or * to check more often for insufficient lookahead. */ Assert(scan[2] == match[2], "scan[2]?"); scan++, match++; do { - } while (*(ushf*)(scan+=2) == *(ushf*)(match+=2) && - *(ushf*)(scan+=2) == *(ushf*)(match+=2) && - *(ushf*)(scan+=2) == *(ushf*)(match+=2) && - *(ushf*)(scan+=2) == *(ushf*)(match+=2) && + } while (*(ushf*)(scan += 2) == *(ushf*)(match += 2) && + *(ushf*)(scan += 2) == *(ushf*)(match += 2) && + *(ushf*)(scan += 2) == *(ushf*)(match += 2) && + *(ushf*)(scan += 2) == *(ushf*)(match += 2) && scan < strend); /* The funny "do {}" generates better code on most compilers */ - /* Here, scan <= window+strstart+257 */ - Assert(scan <= s->window+(unsigned)(s->window_size-1), "wild scan"); + /* Here, scan <= window + strstart + 257 */ + Assert(scan <= s->window + (unsigned)(s->window_size - 1), + "wild scan"); if (*scan == *match) scan++; - len = (MAX_MATCH - 1) - (int)(strend-scan); + len = (MAX_MATCH - 1) - (int)(strend - scan); scan = strend - (MAX_MATCH-1); #else /* UNALIGNED_OK */ - if (match[best_len] != scan_end || - match[best_len-1] != scan_end1 || - *match != *scan || - *++match != scan[1]) continue; + if (match[best_len] != scan_end || + match[best_len - 1] != scan_end1 || + *match != *scan || + *++match != scan[1]) continue; - /* The check at best_len-1 can be removed because it will be made + /* The check at best_len - 1 can be removed because it will be made * again later. (This heuristic is not always a win.) * It is not necessary to compare scan[2] and match[2] since they * are always equal when the other bytes match, given that @@ -1382,7 +1386,7 @@ local uInt longest_match(s, cur_match) Assert(*scan == *match, "match[2]?"); /* We check for insufficient lookahead only every 8th comparison; - * the 256th check will be made at strstart+258. + * the 256th check will be made at strstart + 258. */ do { } while (*++scan == *++match && *++scan == *++match && @@ -1391,7 +1395,8 @@ local uInt longest_match(s, cur_match) *++scan == *++match && *++scan == *++match && scan < strend); - Assert(scan <= s->window+(unsigned)(s->window_size-1), "wild scan"); + Assert(scan <= s->window + (unsigned)(s->window_size - 1), + "wild scan"); len = MAX_MATCH - (int)(strend - scan); scan = strend - MAX_MATCH; @@ -1403,9 +1408,9 @@ local uInt longest_match(s, cur_match) best_len = len; if (len >= nice_match) break; #ifdef UNALIGNED_OK - scan_end = *(ushf*)(scan+best_len-1); + scan_end = *(ushf*)(scan + best_len - 1); #else - scan_end1 = scan[best_len-1]; + scan_end1 = scan[best_len - 1]; scan_end = scan[best_len]; #endif } @@ -1415,7 +1420,6 @@ local uInt longest_match(s, cur_match) if ((uInt)best_len <= s->lookahead) return (uInt)best_len; return s->lookahead; } -#endif /* ASMV */ #else /* FASTEST */ @@ -1436,7 +1440,8 @@ local uInt longest_match(s, cur_match) */ Assert(s->hash_bits >= 8 && MAX_MATCH == 258, "Code too clever"); - Assert((ulg)s->strstart <= s->window_size-MIN_LOOKAHEAD, "need lookahead"); + Assert((ulg)s->strstart <= s->window_size - MIN_LOOKAHEAD, + "need lookahead"); Assert(cur_match < s->strstart, "no future"); @@ -1446,7 +1451,7 @@ local uInt longest_match(s, cur_match) */ if (match[0] != scan[0] || match[1] != scan[1]) return MIN_MATCH-1; - /* The check at best_len-1 can be removed because it will be made + /* The check at best_len - 1 can be removed because it will be made * again later. (This heuristic is not always a win.) * It is not necessary to compare scan[2] and match[2] since they * are always equal when the other bytes match, given that @@ -1456,7 +1461,7 @@ local uInt longest_match(s, cur_match) Assert(*scan == *match, "match[2]?"); /* We check for insufficient lookahead only every 8th comparison; - * the 256th check will be made at strstart+258. + * the 256th check will be made at strstart + 258. */ do { } while (*++scan == *++match && *++scan == *++match && @@ -1465,7 +1470,7 @@ local uInt longest_match(s, cur_match) *++scan == *++match && *++scan == *++match && scan < strend); - Assert(scan <= s->window+(unsigned)(s->window_size-1), "wild scan"); + Assert(scan <= s->window + (unsigned)(s->window_size - 1), "wild scan"); len = MAX_MATCH - (int)(strend - scan); @@ -1501,7 +1506,7 @@ local void check_match(s, start, match, length) z_error("invalid match"); } if (z_verbose > 1) { - fprintf(stderr,"\\[%d,%d]", start-match, length); + fprintf(stderr,"\\[%d,%d]", start - match, length); do { putc(s->window[start++], stderr); } while (--length != 0); } } @@ -1547,9 +1552,9 @@ local void fill_window(s) /* If the window is almost full and there is insufficient lookahead, * move the upper half to the lower one to make room in the upper half. */ - if (s->strstart >= wsize+MAX_DIST(s)) { + if (s->strstart >= wsize + MAX_DIST(s)) { - zmemcpy(s->window, s->window+wsize, (unsigned)wsize - more); + zmemcpy(s->window, s->window + wsize, (unsigned)wsize - more); s->match_start -= wsize; s->strstart -= wsize; /* we now have strstart >= MAX_DIST */ s->block_start -= (long) wsize; @@ -1680,7 +1685,7 @@ local void fill_window(s) * * deflate_stored() is written to minimize the number of times an input byte is * copied. It is most efficient with large input and output buffers, which - * maximizes the opportunites to have a single copy from next_in to next_out. + * maximizes the opportunities to have a single copy from next_in to next_out. */ local block_state deflate_stored(s, flush) deflate_state *s; @@ -1890,7 +1895,7 @@ local block_state deflate_fast(s, flush) if (s->lookahead == 0) break; /* flush the current block */ } - /* Insert the string window[strstart .. strstart+2] in the + /* Insert the string window[strstart .. strstart + 2] in the * dictionary, and set hash_head to the head of the hash chain: */ hash_head = NIL; @@ -1938,7 +1943,7 @@ local block_state deflate_fast(s, flush) s->strstart += s->match_length; s->match_length = 0; s->ins_h = s->window[s->strstart]; - UPDATE_HASH(s, s->ins_h, s->window[s->strstart+1]); + UPDATE_HASH(s, s->ins_h, s->window[s->strstart + 1]); #if MIN_MATCH != 3 Call UPDATE_HASH() MIN_MATCH-3 more times #endif @@ -1949,7 +1954,7 @@ local block_state deflate_fast(s, flush) } else { /* No match, output a literal byte */ Tracevv((stderr,"%c", s->window[s->strstart])); - _tr_tally_lit (s, s->window[s->strstart], bflush); + _tr_tally_lit(s, s->window[s->strstart], bflush); s->lookahead--; s->strstart++; } @@ -1993,7 +1998,7 @@ local block_state deflate_slow(s, flush) if (s->lookahead == 0) break; /* flush the current block */ } - /* Insert the string window[strstart .. strstart+2] in the + /* Insert the string window[strstart .. strstart + 2] in the * dictionary, and set hash_head to the head of the hash chain: */ hash_head = NIL; @@ -2035,17 +2040,17 @@ local block_state deflate_slow(s, flush) uInt max_insert = s->strstart + s->lookahead - MIN_MATCH; /* Do not insert strings in hash table beyond this. */ - check_match(s, s->strstart-1, s->prev_match, s->prev_length); + check_match(s, s->strstart - 1, s->prev_match, s->prev_length); - _tr_tally_dist(s, s->strstart -1 - s->prev_match, + _tr_tally_dist(s, s->strstart - 1 - s->prev_match, s->prev_length - MIN_MATCH, bflush); /* Insert in hash table all strings up to the end of the match. - * strstart-1 and strstart are already inserted. If there is not + * strstart - 1 and strstart are already inserted. If there is not * enough lookahead, the last two strings are not inserted in * the hash table. */ - s->lookahead -= s->prev_length-1; + s->lookahead -= s->prev_length - 1; s->prev_length -= 2; do { if (++s->strstart <= max_insert) { @@ -2063,8 +2068,8 @@ local block_state deflate_slow(s, flush) * single literal. If there was a match but the current match * is longer, truncate the previous match to a single literal. */ - Tracevv((stderr,"%c", s->window[s->strstart-1])); - _tr_tally_lit(s, s->window[s->strstart-1], bflush); + Tracevv((stderr,"%c", s->window[s->strstart - 1])); + _tr_tally_lit(s, s->window[s->strstart - 1], bflush); if (bflush) { FLUSH_BLOCK_ONLY(s, 0); } @@ -2082,8 +2087,8 @@ local block_state deflate_slow(s, flush) } Assert (flush != Z_NO_FLUSH, "no flush?"); if (s->match_available) { - Tracevv((stderr,"%c", s->window[s->strstart-1])); - _tr_tally_lit(s, s->window[s->strstart-1], bflush); + Tracevv((stderr,"%c", s->window[s->strstart - 1])); + _tr_tally_lit(s, s->window[s->strstart - 1], bflush); s->match_available = 0; } s->insert = s->strstart < MIN_MATCH-1 ? s->strstart : MIN_MATCH-1; @@ -2140,7 +2145,8 @@ local block_state deflate_rle(s, flush) if (s->match_length > s->lookahead) s->match_length = s->lookahead; } - Assert(scan <= s->window+(uInt)(s->window_size-1), "wild scan"); + Assert(scan <= s->window + (uInt)(s->window_size - 1), + "wild scan"); } /* Emit match if have run of MIN_MATCH or longer, else emit literal */ @@ -2155,7 +2161,7 @@ local block_state deflate_rle(s, flush) } else { /* No match, output a literal byte */ Tracevv((stderr,"%c", s->window[s->strstart])); - _tr_tally_lit (s, s->window[s->strstart], bflush); + _tr_tally_lit(s, s->window[s->strstart], bflush); s->lookahead--; s->strstart++; } @@ -2195,7 +2201,7 @@ local block_state deflate_huff(s, flush) /* Output a literal byte */ s->match_length = 0; Tracevv((stderr,"%c", s->window[s->strstart])); - _tr_tally_lit (s, s->window[s->strstart], bflush); + _tr_tally_lit(s, s->window[s->strstart], bflush); s->lookahead--; s->strstart++; if (bflush) FLUSH_BLOCK(s, 0); |