diff options
author | pixel <pixel> | 2005-10-13 16:12:18 +0000 |
---|---|---|
committer | pixel <pixel> | 2005-10-13 16:12:18 +0000 |
commit | 32ae837d333bfeab34bbb3bbfac90eb0c78ada6f (patch) | |
tree | 5af2a2142ed36d9dd8303d69f8da78b61a28cbab /lib/zlib/src | |
parent | 0b7cc6372fd55d7f97122db97f6f8a2f5ef33809 (diff) |
Updating zlib to 1.2.3.
Diffstat (limited to 'lib/zlib/src')
-rw-r--r-- | lib/zlib/src/adler32.c | 113 | ||||
-rw-r--r-- | lib/zlib/src/compress.c | 4 | ||||
-rw-r--r-- | lib/zlib/src/crc32.c | 104 | ||||
-rw-r--r-- | lib/zlib/src/deflate.c | 284 | ||||
-rw-r--r-- | lib/zlib/src/gzio.c | 53 | ||||
-rw-r--r-- | lib/zlib/src/inffast.c | 13 | ||||
-rw-r--r-- | lib/zlib/src/inflate.c | 126 | ||||
-rw-r--r-- | lib/zlib/src/inftrees.c | 11 | ||||
-rw-r--r-- | lib/zlib/src/trees.c | 38 | ||||
-rw-r--r-- | lib/zlib/src/uncompr.c | 2 | ||||
-rw-r--r-- | lib/zlib/src/zutil.c | 35 |
11 files changed, 655 insertions, 128 deletions
diff --git a/lib/zlib/src/adler32.c b/lib/zlib/src/adler32.c index 72cbb87..66127b5 100644 --- a/lib/zlib/src/adler32.c +++ b/lib/zlib/src/adler32.c @@ -1,9 +1,9 @@ /* adler32.c -- compute the Adler-32 checksum of a data stream - * Copyright (C) 1995-2003 Mark Adler + * Copyright (C) 1995-2004 Mark Adler * For conditions of distribution and use, see copyright notice in zlib.h */ -/* @(#) $Id: adler32.c,v 1.4 2005-06-06 11:16:16 pixel Exp $ */ +/* @(#) $Id: adler32.c,v 1.5 2005-10-13 16:12:18 pixel Exp $ */ #define ZLIB_INTERNAL #include "zlib.h" @@ -12,12 +12,13 @@ #define NMAX 5552 /* NMAX is the largest n such that 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1 */ -#define DO1(buf,i) {s1 += buf[i]; s2 += s1;} +#define DO1(buf,i) {adler += (buf)[i]; sum2 += adler;} #define DO2(buf,i) DO1(buf,i); DO1(buf,i+1); #define DO4(buf,i) DO2(buf,i); DO2(buf,i+2); #define DO8(buf,i) DO4(buf,i); DO4(buf,i+4); #define DO16(buf) DO8(buf,0); DO8(buf,8); +/* use NO_DIVIDE if your processor does not do division in hardware */ #ifdef NO_DIVIDE # define MOD(a) \ do { \ @@ -39,8 +40,17 @@ if (a >= (BASE << 1)) a -= (BASE << 1); \ if (a >= BASE) a -= BASE; \ } while (0) +# define MOD4(a) \ + do { \ + if (a >= (BASE << 4)) a -= (BASE << 4); \ + if (a >= (BASE << 3)) a -= (BASE << 3); \ + if (a >= (BASE << 2)) a -= (BASE << 2); \ + if (a >= (BASE << 1)) a -= (BASE << 1); \ + if (a >= BASE) a -= BASE; \ + } while (0) #else # define MOD(a) a %= BASE +# define MOD4(a) a %= BASE #endif /* ========================================================================= */ @@ -49,26 +59,91 @@ uLong ZEXPORT adler32(adler, buf, len) const Bytef *buf; uInt len; { - unsigned long s1 = adler & 0xffff; - unsigned long s2 = (adler >> 16) & 0xffff; - int k; + unsigned long sum2; + unsigned n; + + /* split Adler-32 into component sums */ + sum2 = (adler >> 16) & 0xffff; + adler &= 0xffff; + + /* in case user likes doing a byte at a time, keep it fast */ + if (len == 1) { + adler += buf[0]; + if (adler >= BASE) + adler -= BASE; + sum2 += adler; + if (sum2 >= BASE) + sum2 -= BASE; + return adler | (sum2 << 16); + } - if (buf == Z_NULL) return 1L; + /* initial Adler-32 value (deferred check for len == 1 speed) */ + if (buf == Z_NULL) + return 1L; - while (len > 0) { - k = len < NMAX ? (int)len : NMAX; - len -= k; - while (k >= 16) { + /* in case short lengths are provided, keep it somewhat fast */ + if (len < 16) { + while (len--) { + adler += *buf++; + sum2 += adler; + } + if (adler >= BASE) + adler -= BASE; + MOD4(sum2); /* only added so many BASE's */ + return adler | (sum2 << 16); + } + + /* do length NMAX blocks -- requires just one modulo operation */ + while (len >= NMAX) { + len -= NMAX; + n = NMAX / 16; /* NMAX is divisible by 16 */ + do { + DO16(buf); /* 16 sums unrolled */ + buf += 16; + } while (--n); + MOD(adler); + MOD(sum2); + } + + /* do remaining bytes (less than NMAX, still just one modulo) */ + if (len) { /* avoid modulos if none remaining */ + while (len >= 16) { + len -= 16; DO16(buf); buf += 16; - k -= 16; } - if (k != 0) do { - s1 += *buf++; - s2 += s1; - } while (--k); - MOD(s1); - MOD(s2); + while (len--) { + adler += *buf++; + sum2 += adler; + } + MOD(adler); + MOD(sum2); } - return (s2 << 16) | s1; + + /* return recombined sums */ + return adler | (sum2 << 16); +} + +/* ========================================================================= */ +uLong ZEXPORT adler32_combine(adler1, adler2, len2) + uLong adler1; + uLong adler2; + z_off_t len2; +{ + unsigned long sum1; + unsigned long sum2; + unsigned rem; + + /* the derivation of this formula is left as an exercise for the reader */ + rem = (unsigned)(len2 % BASE); + sum1 = adler1 & 0xffff; + sum2 = rem * sum1; + MOD(sum2); + sum1 += (adler2 & 0xffff) + BASE - 1; + sum2 += ((adler1 >> 16) & 0xffff) + ((adler2 >> 16) & 0xffff) + BASE - rem; + if (sum1 > BASE) sum1 -= BASE; + if (sum1 > BASE) sum1 -= BASE; + if (sum2 > (BASE << 1)) sum2 -= (BASE << 1); + if (sum2 > BASE) sum2 -= BASE; + return sum1 | (sum2 << 16); } diff --git a/lib/zlib/src/compress.c b/lib/zlib/src/compress.c index cd7e3d7..e82b885 100644 --- a/lib/zlib/src/compress.c +++ b/lib/zlib/src/compress.c @@ -1,9 +1,9 @@ /* compress.c -- compress a memory buffer - * Copyright (C) 1995-2002 Jean-loup Gailly. + * Copyright (C) 1995-2003 Jean-loup Gailly. * For conditions of distribution and use, see copyright notice in zlib.h */ -/* @(#) $Id: compress.c,v 1.4 2005-06-06 11:16:16 pixel Exp $ */ +/* @(#) $Id: compress.c,v 1.5 2005-10-13 16:12:18 pixel Exp $ */ #define ZLIB_INTERNAL #include "zlib.h" diff --git a/lib/zlib/src/crc32.c b/lib/zlib/src/crc32.c index 4d57a28..4143da7 100644 --- a/lib/zlib/src/crc32.c +++ b/lib/zlib/src/crc32.c @@ -1,15 +1,15 @@ /* crc32.c -- compute the CRC-32 of a data stream - * Copyright (C) 1995-2003 Mark Adler + * Copyright (C) 1995-2005 Mark Adler * For conditions of distribution and use, see copyright notice in zlib.h * * Thanks to Rodney Brown <rbrown64@csc.com.au> for his contribution of faster * CRC methods: exclusive-oring 32 bits of data at a time, and pre-computing * tables for updating the shift register in one step with three exclusive-ors - * instead of four steps with four exclusive-ors. This results about a factor - * of two increase in speed on a Power PC G4 (PPC7455) using gcc -O3. + * instead of four steps with four exclusive-ors. This results in about a + * factor of two increase in speed on a Power PC G4 (PPC7455) using gcc -O3. */ -/* @(#) $Id: crc32.c,v 1.4 2005-06-06 11:16:16 pixel Exp $ */ +/* @(#) $Id: crc32.c,v 1.5 2005-10-13 16:12:18 pixel Exp $ */ /* Note on the use of DYNAMIC_CRC_TABLE: there is no mutex or semaphore @@ -64,6 +64,11 @@ # define TBLS 1 #endif /* BYFOUR */ +/* Local functions for crc concatenation */ +local unsigned long gf2_matrix_times OF((unsigned long *mat, + unsigned long vec)); +local void gf2_matrix_square OF((unsigned long *square, unsigned long *mat)); + #ifdef DYNAMIC_CRC_TABLE local volatile int crc_table_empty = 1; @@ -72,7 +77,6 @@ local void make_crc_table OF((void)); #ifdef MAKECRCH local void write_table OF((FILE *, const unsigned long FAR *)); #endif /* MAKECRCH */ - /* Generate tables for a byte-wise 32-bit CRC calculation on the polynomial: x^32+x^26+x^23+x^22+x^16+x^12+x^11+x^10+x^8+x^7+x^5+x^4+x^2+x+1. @@ -270,7 +274,7 @@ local unsigned long crc32_little(crc, buf, len) len--; } - buf4 = (const u4 FAR *)buf; + buf4 = (const u4 FAR *)(const void FAR *)buf; while (len >= 32) { DOLIT32; len -= 32; @@ -310,7 +314,7 @@ local unsigned long crc32_big(crc, buf, len) len--; } - buf4 = (const u4 FAR *)buf; + buf4 = (const u4 FAR *)(const void FAR *)buf; buf4--; while (len >= 32) { DOBIG32; @@ -331,3 +335,89 @@ local unsigned long crc32_big(crc, buf, len) } #endif /* BYFOUR */ + +#define GF2_DIM 32 /* dimension of GF(2) vectors (length of CRC) */ + +/* ========================================================================= */ +local unsigned long gf2_matrix_times(mat, vec) + unsigned long *mat; + unsigned long vec; +{ + unsigned long sum; + + sum = 0; + while (vec) { + if (vec & 1) + sum ^= *mat; + vec >>= 1; + mat++; + } + return sum; +} + +/* ========================================================================= */ +local void gf2_matrix_square(square, mat) + unsigned long *square; + unsigned long *mat; +{ + int n; + + for (n = 0; n < GF2_DIM; n++) + square[n] = gf2_matrix_times(mat, mat[n]); +} + +/* ========================================================================= */ +uLong ZEXPORT crc32_combine(crc1, crc2, len2) + uLong crc1; + uLong crc2; + z_off_t len2; +{ + int n; + unsigned long row; + unsigned long even[GF2_DIM]; /* even-power-of-two zeros operator */ + unsigned long odd[GF2_DIM]; /* odd-power-of-two zeros operator */ + + /* degenerate case */ + if (len2 == 0) + return crc1; + + /* put operator for one zero bit in odd */ + odd[0] = 0xedb88320L; /* CRC-32 polynomial */ + row = 1; + for (n = 1; n < GF2_DIM; n++) { + odd[n] = row; + row <<= 1; + } + + /* put operator for two zero bits in even */ + gf2_matrix_square(even, odd); + + /* put operator for four zero bits in odd */ + gf2_matrix_square(odd, even); + + /* apply len2 zeros to crc1 (first square will put the operator for one + zero byte, eight zero bits, in even) */ + do { + /* apply zeros operator for this bit of len2 */ + gf2_matrix_square(even, odd); + if (len2 & 1) + crc1 = gf2_matrix_times(even, crc1); + len2 >>= 1; + + /* if no more bits set, then done */ + if (len2 == 0) + break; + + /* another iteration of the loop with odd and even swapped */ + gf2_matrix_square(odd, even); + if (len2 & 1) + crc1 = gf2_matrix_times(odd, crc1); + len2 >>= 1; + + /* if no more bits set, then done */ + } while (len2 != 0); + + /* return combined crc */ + crc1 ^= crc2; + return crc1; +} diff --git a/lib/zlib/src/deflate.c b/lib/zlib/src/deflate.c index 8953302..6a5442f 100644 --- a/lib/zlib/src/deflate.c +++ b/lib/zlib/src/deflate.c @@ -1,5 +1,5 @@ /* deflate.c -- compress data using the deflation algorithm - * Copyright (C) 1995-2004 Jean-loup Gailly. + * Copyright (C) 1995-2005 Jean-loup Gailly. * For conditions of distribution and use, see copyright notice in zlib.h */ @@ -47,12 +47,12 @@ * */ -/* @(#) $Id: deflate.c,v 1.4 2005-06-06 11:16:16 pixel Exp $ */ +/* @(#) $Id: deflate.c,v 1.5 2005-10-13 16:12:18 pixel Exp $ */ #include "deflate.h" const char deflate_copyright[] = - " deflate 1.2.2 Copyright 1995-2004 Jean-loup Gailly "; + " deflate 1.2.3 Copyright 1995-2005 Jean-loup Gailly "; /* 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 @@ -264,7 +264,7 @@ int ZEXPORT deflateInit2_(strm, level, method, windowBits, memLevel, strategy, #endif if (memLevel < 1 || memLevel > MAX_MEM_LEVEL || method != Z_DEFLATED || windowBits < 8 || windowBits > 15 || level < 0 || level > 9 || - strategy < 0 || strategy > Z_RLE) { + strategy < 0 || strategy > Z_FIXED) { return Z_STREAM_ERROR; } if (windowBits == 8) windowBits = 9; /* until 256-byte window bug fixed */ @@ -274,6 +274,7 @@ int ZEXPORT deflateInit2_(strm, level, method, windowBits, memLevel, strategy, s->strm = strm; s->wrap = wrap; + s->gzhead = Z_NULL; s->w_bits = windowBits; s->w_size = 1 << s->w_bits; s->w_mask = s->w_size - 1; @@ -333,9 +334,7 @@ int ZEXPORT deflateSetDictionary (strm, dictionary, dictLength) if (length < MIN_MATCH) return Z_OK; if (length > MAX_DIST(s)) { length = MAX_DIST(s); -#ifndef USE_DICT_HEAD dictionary += dictLength - length; /* use the tail of the dictionary */ -#endif } zmemcpy(s->window, dictionary, length); s->strstart = length; @@ -391,6 +390,17 @@ int ZEXPORT deflateReset (strm) } /* ========================================================================= */ +int ZEXPORT deflateSetHeader (strm, head) + z_streamp strm; + gz_headerp head; +{ + if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR; + if (strm->state->wrap != 2) return Z_STREAM_ERROR; + strm->state->gzhead = head; + return Z_OK; +} + +/* ========================================================================= */ int ZEXPORT deflatePrime (strm, bits, value) z_streamp strm; int bits; @@ -420,7 +430,7 @@ int ZEXPORT deflateParams(strm, level, strategy) #else if (level == Z_DEFAULT_COMPRESSION) level = 6; #endif - if (level < 0 || level > 9 || strategy < 0 || strategy > Z_RLE) { + if (level < 0 || level > 9 || strategy < 0 || strategy > Z_FIXED) { return Z_STREAM_ERROR; } func = configuration_table[s->level].func; @@ -440,6 +450,25 @@ int ZEXPORT deflateParams(strm, level, strategy) return err; } +/* ========================================================================= */ +int ZEXPORT deflateTune(strm, good_length, max_lazy, nice_length, max_chain) + z_streamp strm; + int good_length; + int max_lazy; + int nice_length; + int max_chain; +{ + deflate_state *s; + + if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR; + s = strm->state; + s->good_match = good_length; + s->max_lazy_match = max_lazy; + s->nice_match = nice_length; + s->max_chain_length = max_chain; + return Z_OK; +} + /* ========================================================================= * 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. @@ -548,20 +577,47 @@ int ZEXPORT deflate (strm, flush) if (s->status == INIT_STATE) { #ifdef GZIP if (s->wrap == 2) { + strm->adler = crc32(0L, Z_NULL, 0); put_byte(s, 31); put_byte(s, 139); put_byte(s, 8); - put_byte(s, 0); - put_byte(s, 0); - put_byte(s, 0); - put_byte(s, 0); - put_byte(s, 0); - put_byte(s, s->level == 9 ? 2 : - (s->strategy >= Z_HUFFMAN_ONLY || s->level < 2 ? - 4 : 0)); - put_byte(s, 255); - s->status = BUSY_STATE; - strm->adler = crc32(0L, Z_NULL, 0); + if (s->gzhead == NULL) { + put_byte(s, 0); + put_byte(s, 0); + put_byte(s, 0); + put_byte(s, 0); + put_byte(s, 0); + put_byte(s, s->level == 9 ? 2 : + (s->strategy >= Z_HUFFMAN_ONLY || s->level < 2 ? + 4 : 0)); + put_byte(s, OS_CODE); + s->status = BUSY_STATE; + } + else { + put_byte(s, (s->gzhead->text ? 1 : 0) + + (s->gzhead->hcrc ? 2 : 0) + + (s->gzhead->extra == Z_NULL ? 0 : 4) + + (s->gzhead->name == Z_NULL ? 0 : 8) + + (s->gzhead->comment == Z_NULL ? 0 : 16) + ); + put_byte(s, (Byte)(s->gzhead->time & 0xff)); + put_byte(s, (Byte)((s->gzhead->time >> 8) & 0xff)); + put_byte(s, (Byte)((s->gzhead->time >> 16) & 0xff)); + put_byte(s, (Byte)((s->gzhead->time >> 24) & 0xff)); + put_byte(s, s->level == 9 ? 2 : + (s->strategy >= Z_HUFFMAN_ONLY || s->level < 2 ? + 4 : 0)); + put_byte(s, s->gzhead->os & 0xff); + if (s->gzhead->extra != NULL) { + put_byte(s, s->gzhead->extra_len & 0xff); + put_byte(s, (s->gzhead->extra_len >> 8) & 0xff); + } + if (s->gzhead->hcrc) + strm->adler = crc32(strm->adler, s->pending_buf, + s->pending); + s->gzindex = 0; + s->status = EXTRA_STATE; + } } else #endif @@ -592,6 +648,110 @@ int ZEXPORT deflate (strm, flush) strm->adler = adler32(0L, Z_NULL, 0); } } +#ifdef GZIP + if (s->status == EXTRA_STATE) { + if (s->gzhead->extra != NULL) { + uInt beg = s->pending; /* start of bytes to update crc */ + + while (s->gzindex < (s->gzhead->extra_len & 0xffff)) { + if (s->pending == s->pending_buf_size) { + if (s->gzhead->hcrc && s->pending > beg) + strm->adler = crc32(strm->adler, s->pending_buf + beg, + s->pending - beg); + flush_pending(strm); + beg = s->pending; + if (s->pending == s->pending_buf_size) + break; + } + put_byte(s, s->gzhead->extra[s->gzindex]); + s->gzindex++; + } + if (s->gzhead->hcrc && s->pending > beg) + strm->adler = crc32(strm->adler, s->pending_buf + beg, + s->pending - beg); + if (s->gzindex == s->gzhead->extra_len) { + s->gzindex = 0; + s->status = NAME_STATE; + } + } + else + s->status = NAME_STATE; + } + if (s->status == NAME_STATE) { + if (s->gzhead->name != NULL) { + uInt beg = s->pending; /* start of bytes to update crc */ + int val; + + do { + if (s->pending == s->pending_buf_size) { + if (s->gzhead->hcrc && s->pending > beg) + strm->adler = crc32(strm->adler, s->pending_buf + beg, + s->pending - beg); + flush_pending(strm); + beg = s->pending; + if (s->pending == s->pending_buf_size) { + val = 1; + break; + } + } + val = s->gzhead->name[s->gzindex++]; + put_byte(s, val); + } while (val != 0); + if (s->gzhead->hcrc && s->pending > beg) + strm->adler = crc32(strm->adler, s->pending_buf + beg, + s->pending - beg); + if (val == 0) { + s->gzindex = 0; + s->status = COMMENT_STATE; + } + } + else + s->status = COMMENT_STATE; + } + if (s->status == COMMENT_STATE) { + if (s->gzhead->comment != NULL) { + uInt beg = s->pending; /* start of bytes to update crc */ + int val; + + do { + if (s->pending == s->pending_buf_size) { + if (s->gzhead->hcrc && s->pending > beg) + strm->adler = crc32(strm->adler, s->pending_buf + beg, + s->pending - beg); + flush_pending(strm); + beg = s->pending; + if (s->pending == s->pending_buf_size) { + val = 1; + break; + } + } + val = s->gzhead->comment[s->gzindex++]; + put_byte(s, val); + } while (val != 0); + if (s->gzhead->hcrc && s->pending > beg) + strm->adler = crc32(strm->adler, s->pending_buf + beg, + s->pending - beg); + if (val == 0) + s->status = HCRC_STATE; + } + else + s->status = HCRC_STATE; + } + if (s->status == HCRC_STATE) { + if (s->gzhead->hcrc) { + if (s->pending + 2 > s->pending_buf_size) + flush_pending(strm); + if (s->pending + 2 <= s->pending_buf_size) { + put_byte(s, (Byte)(strm->adler & 0xff)); + put_byte(s, (Byte)((strm->adler >> 8) & 0xff)); + strm->adler = crc32(0L, Z_NULL, 0); + s->status = BUSY_STATE; + } + } + else + s->status = BUSY_STATE; + } +#endif /* Flush as much pending output as possible */ if (s->pending != 0) { @@ -704,7 +864,12 @@ int ZEXPORT deflateEnd (strm) if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR; status = strm->state->status; - if (status != INIT_STATE && status != BUSY_STATE && + if (status != INIT_STATE && + status != EXTRA_STATE && + status != NAME_STATE && + status != COMMENT_STATE && + status != HCRC_STATE && + status != BUSY_STATE && status != FINISH_STATE) { return Z_STREAM_ERROR; } @@ -744,12 +909,12 @@ int ZEXPORT deflateCopy (dest, source) ss = source->state; - *dest = *source; + zmemcpy(dest, source, sizeof(z_stream)); ds = (deflate_state *) ZALLOC(dest, 1, sizeof(deflate_state)); if (ds == Z_NULL) return Z_MEM_ERROR; dest->state = (struct internal_state FAR *) ds; - *ds = *ss; + zmemcpy(ds, ss, sizeof(deflate_state)); ds->strm = dest; ds->window = (Bytef *) ZALLOC(dest, ds->w_size, 2*sizeof(Byte)); @@ -838,9 +1003,11 @@ 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 @@ -909,7 +1076,12 @@ local uInt longest_match(s, cur_match) match = s->window + cur_match; /* Skip to next match if the match length cannot increase - * or if the match length is less than 2: + * or if the match length is less than 2. Note that the checks below + * for insufficient lookahead only occur occasionally for performance + * reasons. Therefore uninitialized memory will be accessed, and + * conditional jumps will be made that depend on those values. + * However the length of the match is limited to the lookahead, so + * the output of deflate is not affected by the uninitialized values. */ #if (defined(UNALIGNED_OK) && MAX_MATCH == 258) /* This code assumes sizeof(unsigned short) == 2. Do not use @@ -1131,6 +1303,7 @@ local void fill_window(s) later. (Using level 0 permanently is not an optimal usage of zlib, so we don't care about this pathological case.) */ + /* %%% avoid this when Z_RLE */ n = s->hash_size; p = &s->head[n]; do { @@ -1309,12 +1482,12 @@ local block_state deflate_fast(s, flush) * of the string with itself at the start of the input file). */ #ifdef FASTEST - if ((s->strategy < Z_HUFFMAN_ONLY) || + if ((s->strategy != Z_HUFFMAN_ONLY && s->strategy != Z_RLE) || (s->strategy == Z_RLE && s->strstart - hash_head == 1)) { s->match_length = longest_match_fast (s, hash_head); } #else - if (s->strategy < Z_HUFFMAN_ONLY) { + if (s->strategy != Z_HUFFMAN_ONLY && s->strategy != Z_RLE) { s->match_length = longest_match (s, hash_head); } else if (s->strategy == Z_RLE && s->strstart - hash_head == 1) { s->match_length = longest_match_fast (s, hash_head); @@ -1418,7 +1591,7 @@ local block_state deflate_slow(s, flush) * of window index 0 (in particular we have to avoid a match * of the string with itself at the start of the input file). */ - if (s->strategy < Z_HUFFMAN_ONLY) { + if (s->strategy != Z_HUFFMAN_ONLY && s->strategy != Z_RLE) { s->match_length = longest_match (s, hash_head); } else if (s->strategy == Z_RLE && s->strstart - hash_head == 1) { s->match_length = longest_match_fast (s, hash_head); @@ -1500,3 +1673,64 @@ local block_state deflate_slow(s, flush) return flush == Z_FINISH ? finish_done : block_done; } #endif /* FASTEST */ + +#if 0 +/* =========================================================================== + * For Z_RLE, simply look for runs of bytes, generate matches only of distance + * one. Do not maintain a hash table. (It will be regenerated if this run of + * deflate switches away from Z_RLE.) + */ +local block_state deflate_rle(s, flush) + deflate_state *s; + int flush; +{ + int bflush; /* set if current block must be flushed */ + uInt run; /* length of run */ + uInt max; /* maximum length of run */ + uInt prev; /* byte at distance one to match */ + Bytef *scan; /* scan for end of run */ + + for (;;) { + /* Make sure that we always have enough lookahead, except + * at the end of the input file. We need MAX_MATCH bytes + * for the longest encodable run. + */ + if (s->lookahead < MAX_MATCH) { + fill_window(s); + if (s->lookahead < MAX_MATCH && flush == Z_NO_FLUSH) { + return need_more; + } + if (s->lookahead == 0) break; /* flush the current block */ + } + + /* See how many times the previous byte repeats */ + run = 0; + if (s->strstart > 0) { /* if there is a previous byte, that is */ + max = s->lookahead < MAX_MATCH ? s->lookahead : MAX_MATCH; + scan = s->window + s->strstart - 1; + prev = *scan++; + do { + if (*scan++ != prev) + break; + } while (++run < max); + } + + /* Emit match if have run of MIN_MATCH or longer, else emit literal */ + if (run >= MIN_MATCH) { + check_match(s, s->strstart, s->strstart - 1, run); + _tr_tally_dist(s, 1, run - MIN_MATCH, bflush); + s->lookahead -= run; + s->strstart += run; + } else { + /* No match, output a literal byte */ + Tracevv((stderr,"%c", s->window[s->strstart])); + _tr_tally_lit (s, s->window[s->strstart], bflush); + s->lookahead--; + s->strstart++; + } + if (bflush) FLUSH_BLOCK(s, 0); + } + FLUSH_BLOCK(s, flush == Z_FINISH); + return flush == Z_FINISH ? finish_done : block_done; +} +#endif diff --git a/lib/zlib/src/gzio.c b/lib/zlib/src/gzio.c index aa3c931..69ec165 100644 --- a/lib/zlib/src/gzio.c +++ b/lib/zlib/src/gzio.c @@ -1,17 +1,17 @@ /* gzio.c -- IO on .gz files - * Copyright (C) 1995-2003 Jean-loup Gailly. + * Copyright (C) 1995-2005 Jean-loup Gailly. * For conditions of distribution and use, see copyright notice in zlib.h * * Compile this file with -DNO_GZCOMPRESS to avoid the compression code. */ -/* @(#) $Id: gzio.c,v 1.7 2005-06-06 11:16:16 pixel Exp $ */ +/* @(#) $Id: gzio.c,v 1.8 2005-10-13 16:12:18 pixel Exp $ */ #include <stdio.h> #include "zutil.h" -#ifdef NO_DEFLATE /* for compatiblity with old definition */ +#ifdef NO_DEFLATE /* for compatibility with old definition */ # define NO_GZCOMPRESS #endif @@ -220,7 +220,7 @@ gzFile ZEXPORT gzdopen (fd, mode) int fd; const char *mode; { - char name[20]; + char name[46]; /* allow for up to 128-bit integers */ if (fd < 0) return (gzFile)Z_NULL; sprintf(name, "<fd:%d>", fd); /* for debugging */ @@ -264,7 +264,7 @@ local int get_byte(s) if (s->z_eof) return EOF; if (s->stream.avail_in == 0) { errno = 0; - s->stream.avail_in = fread(s->inbuf, 1, Z_BUFSIZE, s->file); + s->stream.avail_in = (uInt)fread(s->inbuf, 1, Z_BUFSIZE, s->file); if (s->stream.avail_in == 0) { s->z_eof = 1; if (ferror(s->file)) s->z_err = Z_ERRNO; @@ -300,7 +300,7 @@ local void check_header(s) if (len < 2) { if (len) s->inbuf[0] = s->stream.next_in[0]; errno = 0; - len = fread(s->inbuf + len, 1, Z_BUFSIZE >> len, s->file); + len = (uInt)fread(s->inbuf + len, 1, Z_BUFSIZE >> len, s->file); if (len == 0 && ferror(s->file)) s->z_err = Z_ERRNO; s->stream.avail_in += len; s->stream.next_in = s->inbuf; @@ -415,6 +415,7 @@ int ZEXPORT gzread (file, buf, len) s->stream.avail_out--; s->back = EOF; s->out++; + start++; if (s->last) { s->z_err = Z_STREAM_END; return 1; @@ -436,8 +437,8 @@ int ZEXPORT gzread (file, buf, len) s->stream.avail_in -= n; } if (s->stream.avail_out > 0) { - s->stream.avail_out -= fread(next_out, 1, s->stream.avail_out, - s->file); + s->stream.avail_out -= + (uInt)fread(next_out, 1, s->stream.avail_out, s->file); } len -= s->stream.avail_out; s->in += len; @@ -448,17 +449,13 @@ int ZEXPORT gzread (file, buf, len) if (s->stream.avail_in == 0 && !s->z_eof) { errno = 0; - s->stream.avail_in = fread(s->inbuf, 1, Z_BUFSIZE, s->file); + s->stream.avail_in = (uInt)fread(s->inbuf, 1, Z_BUFSIZE, s->file); if (s->stream.avail_in == 0) { s->z_eof = 1; if (ferror(s->file)) { s->z_err = Z_ERRNO; break; } - if (feof(s->file)) { /* avoid error for empty file */ - s->z_err = Z_STREAM_END; - break; - } } s->stream.next_in = s->inbuf; } @@ -492,6 +489,9 @@ int ZEXPORT gzread (file, buf, len) } s->crc = crc32(s->crc, start, (uInt)(s->stream.next_out - start)); + if (len == s->stream.avail_out && + (s->z_err == Z_DATA_ERROR || s->z_err == Z_ERRNO)) + return -1; return (int)(len - s->stream.avail_out); } @@ -903,6 +903,18 @@ int ZEXPORT gzeof (file) } /* =========================================================================== + Returns 1 if reading and doing so transparently, otherwise zero. +*/ +int ZEXPORT gzdirect (file) + gzFile file; +{ + gz_stream *s = (gz_stream*)file; + + if (s == NULL || s->mode != 'r') return 0; + return s->transparent; +} + +/* =========================================================================== Outputs a long in LSB order to the given file */ local void putLong (file, x) @@ -941,7 +953,6 @@ local uLong getLong (s) int ZEXPORT gzclose (file) gzFile file; { - int err; gz_stream *s = (gz_stream*)file; if (s == NULL) return Z_STREAM_ERROR; @@ -950,8 +961,8 @@ int ZEXPORT gzclose (file) #ifdef NO_GZCOMPRESS return Z_STREAM_ERROR; #else - err = do_flush (file, Z_FINISH); - if (err != Z_OK) return destroy((gz_stream*)file); + if (do_flush (file, Z_FINISH) != Z_OK) + return destroy((gz_stream*)file); putLong (s->file, s->crc); putLong (s->file, (uLong)(s->in & 0xffffffff)); @@ -960,10 +971,16 @@ int ZEXPORT gzclose (file) return destroy((gz_stream*)file); } +#ifdef STDC +# define zstrerror(errnum) strerror(errnum) +#else +# define zstrerror(errnum) "" +#endif + /* =========================================================================== - Returns the error message for the last error which occured on the + Returns the error message for the last error which occurred on the given compressed file. errnum is set to zlib error number. If an - error occured in the file system and not in the compression library, + error occurred in the file system and not in the compression library, errnum is set to Z_ERRNO and the application may consult errno to get the exact error code. */ diff --git a/lib/zlib/src/inffast.c b/lib/zlib/src/inffast.c index 8c02a17..bbee92e 100644 --- a/lib/zlib/src/inffast.c +++ b/lib/zlib/src/inffast.c @@ -74,6 +74,9 @@ unsigned start; /* inflate()'s starting value for strm->avail_out */ unsigned char FAR *out; /* local strm->next_out */ unsigned char FAR *beg; /* inflate()'s initial strm->next_out */ unsigned char FAR *end; /* while out < end, enough space available */ +#ifdef INFLATE_STRICT + unsigned dmax; /* maximum distance from zlib header */ +#endif unsigned wsize; /* window size or zero if not using window */ unsigned whave; /* valid bytes in the window */ unsigned write; /* window write index */ @@ -98,6 +101,9 @@ unsigned start; /* inflate()'s starting value for strm->avail_out */ out = strm->next_out - OFF; beg = out - (start - strm->avail_out); end = out + (strm->avail_out - 257); +#ifdef INFLATE_STRICT + dmax = state->dmax; +#endif wsize = state->wsize; whave = state->whave; write = state->write; @@ -167,6 +173,13 @@ unsigned start; /* inflate()'s starting value for strm->avail_out */ } } dist += (unsigned)hold & ((1U << op) - 1); +#ifdef INFLATE_STRICT + if (dist > dmax) { + strm->msg = (char *)"invalid distance too far back"; + state->mode = BAD; + break; + } +#endif hold >>= op; bits -= op; Tracevv((stderr, "inflate: distance %u\n", dist)); diff --git a/lib/zlib/src/inflate.c b/lib/zlib/src/inflate.c index c6d3826..792fdee 100644 --- a/lib/zlib/src/inflate.c +++ b/lib/zlib/src/inflate.c @@ -1,5 +1,5 @@ /* inflate.c -- zlib decompression - * Copyright (C) 1995-2003 Mark Adler + * Copyright (C) 1995-2005 Mark Adler * For conditions of distribution and use, see copyright notice in zlib.h */ @@ -113,8 +113,11 @@ z_streamp strm; state->mode = HEAD; state->last = 0; state->havedict = 0; + state->dmax = 32768U; + state->head = Z_NULL; state->wsize = 0; state->whave = 0; + state->write = 0; state->hold = 0; state->bits = 0; state->lencode = state->distcode = state->next = state->codes; @@ -122,6 +125,22 @@ z_streamp strm; return Z_OK; } +int ZEXPORT inflatePrime(strm, bits, value) +z_streamp strm; +int bits; +int value; +{ + struct inflate_state FAR *state; + + if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR; + state = (struct inflate_state FAR *)strm->state; + if (bits > 16 || state->bits + bits > 32) return Z_STREAM_ERROR; + value &= (1L << bits) - 1; + state->hold += value << state->bits; + state->bits += bits; + return Z_OK; +} + int ZEXPORT inflateInit2_(strm, windowBits, version, stream_size) z_streamp strm; int windowBits; @@ -144,7 +163,7 @@ int stream_size; ZALLOC(strm, 1, sizeof(struct inflate_state)); if (state == Z_NULL) return Z_MEM_ERROR; Tracev((stderr, "inflate: allocated\n")); - strm->state = (voidpf)state; + strm->state = (struct internal_state FAR *)state; if (windowBits < 0) { state->wrap = 0; windowBits = -windowBits; @@ -582,6 +601,8 @@ int flush; break; } state->flags = 0; /* expect zlib header */ + if (state->head != Z_NULL) + state->head->done = -1; if (!(state->wrap & 1) || /* check if zlib header allowed */ #else if ( @@ -597,11 +618,13 @@ int flush; break; } DROPBITS(4); - if (BITS(4) + 8 > state->wbits) { + len = BITS(4) + 8; + if (len > state->wbits) { strm->msg = (char *)"invalid window size"; state->mode = BAD; break; } + state->dmax = 1U << len; Tracev((stderr, "inflate: zlib header ok\n")); strm->adler = state->check = adler32(0L, Z_NULL, 0); state->mode = hold & 0x200 ? DICTID : TYPE; @@ -621,16 +644,24 @@ int flush; state->mode = BAD; break; } + if (state->head != Z_NULL) + state->head->text = (int)((hold >> 8) & 1); if (state->flags & 0x0200) CRC2(state->check, hold); INITBITS(); state->mode = TIME; case TIME: NEEDBITS(32); + if (state->head != Z_NULL) + state->head->time = hold; if (state->flags & 0x0200) CRC4(state->check, hold); INITBITS(); state->mode = OS; case OS: NEEDBITS(16); + if (state->head != Z_NULL) { + state->head->xflags = (int)(hold & 0xff); + state->head->os = (int)(hold >> 8); + } if (state->flags & 0x0200) CRC2(state->check, hold); INITBITS(); state->mode = EXLEN; @@ -638,15 +669,26 @@ int flush; if (state->flags & 0x0400) { NEEDBITS(16); state->length = (unsigned)(hold); + if (state->head != Z_NULL) + state->head->extra_len = (unsigned)hold; if (state->flags & 0x0200) CRC2(state->check, hold); INITBITS(); } + else if (state->head != Z_NULL) + state->head->extra = Z_NULL; state->mode = EXTRA; case EXTRA: if (state->flags & 0x0400) { copy = state->length; if (copy > have) copy = have; if (copy) { + if (state->head != Z_NULL && + state->head->extra != Z_NULL) { + len = state->head->extra_len - state->length; + zmemcpy(state->head->extra + len, next, + len + copy > state->head->extra_max ? + state->head->extra_max - len : copy); + } if (state->flags & 0x0200) state->check = crc32(state->check, next, copy); have -= copy; @@ -655,6 +697,7 @@ int flush; } if (state->length) goto inf_leave; } + state->length = 0; state->mode = NAME; case NAME: if (state->flags & 0x0800) { @@ -662,13 +705,20 @@ int flush; copy = 0; do { len = (unsigned)(next[copy++]); + if (state->head != Z_NULL && + state->head->name != Z_NULL && + state->length < state->head->name_max) + state->head->name[state->length++] = len; } while (len && copy < have); - if (state->flags & 0x02000) + if (state->flags & 0x0200) state->check = crc32(state->check, next, copy); have -= copy; next += copy; if (len) goto inf_leave; } + else if (state->head != Z_NULL) + state->head->name = Z_NULL; + state->length = 0; state->mode = COMMENT; case COMMENT: if (state->flags & 0x1000) { @@ -676,13 +726,19 @@ int flush; copy = 0; do { len = (unsigned)(next[copy++]); + if (state->head != Z_NULL && + state->head->comment != Z_NULL && + state->length < state->head->comm_max) + state->head->comment[state->length++] = len; } while (len && copy < have); - if (state->flags & 0x02000) + if (state->flags & 0x0200) state->check = crc32(state->check, next, copy); have -= copy; next += copy; if (len) goto inf_leave; } + else if (state->head != Z_NULL) + state->head->comment = Z_NULL; state->mode = HCRC; case HCRC: if (state->flags & 0x0200) { @@ -694,6 +750,10 @@ int flush; } INITBITS(); } + if (state->head != Z_NULL) { + state->head->hcrc = (int)((state->flags >> 9) & 1); + state->head->done = 1; + } strm->adler = state->check = crc32(0L, Z_NULL, 0); state->mode = TYPE; break; @@ -969,6 +1029,13 @@ int flush; state->offset += BITS(state->extra); DROPBITS(state->extra); } +#ifdef INFLATE_STRICT + if (state->offset > state->dmax) { + strm->msg = (char *)"invalid distance too far back"; + state->mode = BAD; + break; + } +#endif if (state->offset > state->whave + out - left) { strm->msg = (char *)"invalid distance too far back"; state->mode = BAD; @@ -1110,12 +1177,16 @@ uInt dictLength; /* check state */ if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR; state = (struct inflate_state FAR *)strm->state; - if (state->mode != DICT) return Z_STREAM_ERROR; + if (state->wrap != 0 && state->mode != DICT) + return Z_STREAM_ERROR; /* check for correct dictionary id */ - id = adler32(0L, Z_NULL, 0); - id = adler32(id, dictionary, dictLength); - if (id != state->check) return Z_DATA_ERROR; + if (state->mode == DICT) { + id = adler32(0L, Z_NULL, 0); + id = adler32(id, dictionary, dictLength); + if (id != state->check) + return Z_DATA_ERROR; + } /* copy dictionary to window */ if (updatewindow(strm, strm->avail_out)) { @@ -1137,6 +1208,23 @@ uInt dictLength; return Z_OK; } +int ZEXPORT inflateGetHeader(strm, head) +z_streamp strm; +gz_headerp head; +{ + struct inflate_state FAR *state; + + /* check state */ + if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR; + state = (struct inflate_state FAR *)strm->state; + if ((state->wrap & 2) == 0) return Z_STREAM_ERROR; + + /* save header structure */ + state->head = head; + head->done = 0; + return Z_OK; +} + /* Search buf[0..len-1] for the pattern: 0, 0, 0xff, 0xff. Return when found or when out of input. When called, *have is the number of pattern bytes @@ -1239,6 +1327,7 @@ z_streamp source; struct inflate_state FAR *state; struct inflate_state FAR *copy; unsigned char FAR *window; + unsigned wsize; /* check input */ if (dest == Z_NULL || source == Z_NULL || source->state == Z_NULL || @@ -1261,14 +1350,19 @@ z_streamp source; } /* copy state */ - *dest = *source; - *copy = *state; - copy->lencode = copy->codes + (state->lencode - state->codes); - copy->distcode = copy->codes + (state->distcode - state->codes); + zmemcpy(dest, source, sizeof(z_stream)); + zmemcpy(copy, state, sizeof(struct inflate_state)); + if (state->lencode >= state->codes && + state->lencode <= state->codes + ENOUGH - 1) { + copy->lencode = copy->codes + (state->lencode - state->codes); + copy->distcode = copy->codes + (state->distcode - state->codes); + } copy->next = copy->codes + (state->next - state->codes); - if (window != Z_NULL) - zmemcpy(window, state->window, 1U << state->wbits); + if (window != Z_NULL) { + wsize = 1U << state->wbits; + zmemcpy(window, state->window, wsize); + } copy->window = window; - dest->state = (voidpf)copy; + dest->state = (struct internal_state FAR *)copy; return Z_OK; } diff --git a/lib/zlib/src/inftrees.c b/lib/zlib/src/inftrees.c index 8a896b2..8a9c13f 100644 --- a/lib/zlib/src/inftrees.c +++ b/lib/zlib/src/inftrees.c @@ -1,5 +1,5 @@ /* inftrees.c -- generate Huffman trees for efficient decoding - * Copyright (C) 1995-2004 Mark Adler + * Copyright (C) 1995-2005 Mark Adler * For conditions of distribution and use, see copyright notice in zlib.h */ @@ -9,7 +9,7 @@ #define MAXBITS 15 const char inflate_copyright[] = - " inflate 1.2.2 Copyright 1995-2004 Mark Adler "; + " inflate 1.2.3 Copyright 1995-2005 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 @@ -62,7 +62,7 @@ unsigned short FAR *work; 35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 258, 0, 0}; static const unsigned short lext[31] = { /* Length codes 257..285 extra */ 16, 16, 16, 16, 16, 16, 16, 16, 17, 17, 17, 17, 18, 18, 18, 18, - 19, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 16, 199, 198}; + 19, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 16, 201, 196}; static const unsigned short dbase[32] = { /* Distance codes 0..29 base */ 1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49, 65, 97, 129, 193, 257, 385, 513, 769, 1025, 1537, 2049, 3073, 4097, 6145, @@ -134,7 +134,7 @@ unsigned short FAR *work; left -= count[len]; if (left < 0) return -1; /* over-subscribed */ } - if (left > 0 && (type == CODES || (codes - count[0] != 1))) + if (left > 0 && (type == CODES || max != 1)) return -1; /* incomplete set */ /* generate offsets into symbol table for each length for sorting */ @@ -232,6 +232,7 @@ unsigned short FAR *work; /* replicate for those indices with low len bits equal to huff */ incr = 1U << (len - drop); fill = 1U << curr; + min = fill; /* save offset to next table */ do { fill -= incr; next[(huff >> drop) + fill] = this; @@ -262,7 +263,7 @@ unsigned short FAR *work; drop = root; /* increment past last table */ - next += 1U << curr; + next += min; /* here min is 1 << curr */ /* determine length of next table */ curr = len - drop; diff --git a/lib/zlib/src/trees.c b/lib/zlib/src/trees.c index a265973..acb8053 100644 --- a/lib/zlib/src/trees.c +++ b/lib/zlib/src/trees.c @@ -1,5 +1,5 @@ /* trees.c -- output deflated data using Huffman coding - * Copyright (C) 1995-2003 Jean-loup Gailly + * Copyright (C) 1995-2005 Jean-loup Gailly * For conditions of distribution and use, see copyright notice in zlib.h */ @@ -29,7 +29,7 @@ * Addison-Wesley, 1983. ISBN 0-201-06672-6. */ -/* @(#) $Id: trees.c,v 1.4 2005-06-06 11:16:16 pixel Exp $ */ +/* @(#) $Id: trees.c,v 1.5 2005-10-13 16:12:18 pixel Exp $ */ /* #define GEN_TREES_H */ @@ -555,7 +555,7 @@ local void gen_bitlen(s, desc) while (n != 0) { m = s->heap[--h]; if (m > max_code) continue; - if (tree[m].Len != (unsigned) bits) { + if ((unsigned) tree[m].Len != (unsigned) bits) { Trace((stderr,"code %d bits %d->%d\n", m, tree[m].Len, bits)); s->opt_len += ((long)bits - (long)tree[m].Len) *(long)tree[m].Freq; @@ -930,8 +930,9 @@ void _tr_flush_block(s, buf, stored_len, eof) /* Build the Huffman trees unless a stored block is forced */ if (s->level > 0) { - /* Check if the file is ascii or binary */ - if (s->strm->data_type == Z_UNKNOWN) set_data_type(s); + /* Check if the file is binary or text */ + if (stored_len > 0 && s->strm->data_type == Z_UNKNOWN) + set_data_type(s); /* Construct the literal and distance trees */ build_tree(s, (tree_desc *)(&(s->l_desc))); @@ -982,7 +983,7 @@ void _tr_flush_block(s, buf, stored_len, eof) #ifdef FORCE_STATIC } else if (static_lenb >= 0) { /* force static trees */ #else - } else if (static_lenb == opt_lenb) { + } else if (s->strategy == Z_FIXED || static_lenb == opt_lenb) { #endif send_bits(s, (STATIC_TREES<<1)+eof, 3); compress_block(s, (ct_data *)static_ltree, (ct_data *)static_dtree); @@ -1117,21 +1118,24 @@ local void compress_block(s, ltree, dtree) } /* =========================================================================== - * Set the data type to ASCII or BINARY, using a crude approximation: - * binary if more than 20% of the bytes are <= 6 or >= 128, ascii otherwise. - * IN assertion: the fields freq of dyn_ltree are set and the total of all - * frequencies does not exceed 64K (to fit in an int on 16 bit machines). + * Set the data type to BINARY or TEXT, using a crude approximation: + * set it to Z_TEXT if all symbols are either printable characters (33 to 255) + * or white spaces (9 to 13, or 32); or set it to Z_BINARY otherwise. + * IN assertion: the fields Freq of dyn_ltree are set. */ local void set_data_type(s) deflate_state *s; { - int n = 0; - unsigned ascii_freq = 0; - unsigned bin_freq = 0; - while (n < 7) bin_freq += s->dyn_ltree[n++].Freq; - while (n < 128) ascii_freq += s->dyn_ltree[n++].Freq; - while (n < LITERALS) bin_freq += s->dyn_ltree[n++].Freq; - s->strm->data_type = bin_freq > (ascii_freq >> 2) ? Z_BINARY : Z_ASCII; + int n; + + for (n = 0; n < 9; n++) + if (s->dyn_ltree[n].Freq != 0) + break; + if (n == 9) + for (n = 14; n < 32; n++) + if (s->dyn_ltree[n].Freq != 0) + break; + s->strm->data_type = (n == 32) ? Z_TEXT : Z_BINARY; } /* =========================================================================== diff --git a/lib/zlib/src/uncompr.c b/lib/zlib/src/uncompr.c index e607d70..f294253 100644 --- a/lib/zlib/src/uncompr.c +++ b/lib/zlib/src/uncompr.c @@ -3,7 +3,7 @@ * For conditions of distribution and use, see copyright notice in zlib.h */ -/* @(#) $Id: uncompr.c,v 1.4 2005-06-06 11:16:16 pixel Exp $ */ +/* @(#) $Id: uncompr.c,v 1.5 2005-10-13 16:12:18 pixel Exp $ */ #define ZLIB_INTERNAL #include "zlib.h" diff --git a/lib/zlib/src/zutil.c b/lib/zlib/src/zutil.c index e6a998d..a89fec4 100644 --- a/lib/zlib/src/zutil.c +++ b/lib/zlib/src/zutil.c @@ -1,9 +1,9 @@ /* zutil.c -- target dependent utility functions for the compression library - * Copyright (C) 1995-2003 Jean-loup Gailly. + * Copyright (C) 1995-2005 Jean-loup Gailly. * For conditions of distribution and use, see copyright notice in zlib.h */ -/* @(#) $Id: zutil.c,v 1.4 2005-06-06 11:16:16 pixel Exp $ */ +/* @(#) $Id: zutil.c,v 1.5 2005-10-13 16:12:18 pixel Exp $ */ #include "zutil.h" @@ -11,10 +11,6 @@ struct internal_state {int dummy;}; /* for buggy compilers */ #endif -#ifndef STDC -extern void exit OF((int)); -#endif - const char * const z_errmsg[10] = { "need dictionary", /* Z_NEED_DICT 2 */ "stream end", /* Z_STREAM_END 1 */ @@ -78,38 +74,38 @@ uLong ZEXPORT zlibCompileFlags() flags += 1 << 13; #endif #ifdef NO_GZCOMPRESS - flags += 1 << 16; + flags += 1L << 16; #endif #ifdef NO_GZIP - flags += 1 << 17; + flags += 1L << 17; #endif #ifdef PKZIP_BUG_WORKAROUND - flags += 1 << 20; + flags += 1L << 20; #endif #ifdef FASTEST - flags += 1 << 21; + flags += 1L << 21; #endif #ifdef STDC # ifdef NO_vsnprintf - flags += 1 << 25; + flags += 1L << 25; # ifdef HAS_vsprintf_void - flags += 1 << 26; + flags += 1L << 26; # endif # else # ifdef HAS_vsnprintf_void - flags += 1 << 26; + flags += 1L << 26; # endif # endif #else - flags += 1 << 24; + flags += 1L << 24; # ifdef NO_snprintf - flags += 1 << 25; + flags += 1L << 25; # ifdef HAS_sprintf_void - flags += 1 << 26; + flags += 1L << 26; # endif # else # ifdef HAS_snprintf_void - flags += 1 << 26; + flags += 1L << 26; # endif # endif #endif @@ -141,7 +137,10 @@ const char * ZEXPORT zError(err) } #if defined(_WIN32_WCE) - /* does not exist on WCE */ + /* The Microsoft C Run-Time Library for Windows CE doesn't have + * errno. We define it as a global variable to simplify porting. + * Its value is always 0 and should not be used. + */ int errno = 0; #endif |