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-rw-r--r--isys/gzlib/Makefile14
-rw-r--r--isys/gzlib/README1
-rw-r--r--isys/gzlib/binding.c142
-rw-r--r--isys/gzlib/bits.c206
-rw-r--r--isys/gzlib/config.h95
-rw-r--r--isys/gzlib/deflate.c761
-rw-r--r--isys/gzlib/gzip.c536
-rw-r--r--isys/gzlib/gzip.h315
-rw-r--r--isys/gzlib/gzlib.h15
-rw-r--r--isys/gzlib/inflate.c957
-rw-r--r--isys/gzlib/lzw.c27
-rw-r--r--isys/gzlib/lzw.h42
-rw-r--r--isys/gzlib/tailor.h315
-rw-r--r--isys/gzlib/test.c39
-rw-r--r--isys/gzlib/trees.c1069
-rw-r--r--isys/gzlib/unzip.c204
-rw-r--r--isys/gzlib/util.c293
-rw-r--r--isys/gzlib/zip.c112
18 files changed, 0 insertions, 5143 deletions
diff --git a/isys/gzlib/Makefile b/isys/gzlib/Makefile
deleted file mode 100644
index c591ed9c0..000000000
--- a/isys/gzlib/Makefile
+++ /dev/null
@@ -1,14 +0,0 @@
-include ../../Makefile.inc
-
-CFLAGS += -I . -fPIC
-SOURCES = bits.c gzip.c inflate.c lzw.c trees.c unzip.c util.c zip.c binding.c \
- deflate.c zip.c
-OBJS = $(patsubst %.c,%.o,$(SOURCES))
-
-all: libgunzip.a($(OBJS)) test
-
-test: libgunzip.a test.c
- $(CC) $(CFLAGS) -o test test.c libgunzip.a
-
-clean:
- rm -f libgunzip.a $(OBJS)
diff --git a/isys/gzlib/README b/isys/gzlib/README
deleted file mode 100644
index 52eb1d998..000000000
--- a/isys/gzlib/README
+++ /dev/null
@@ -1 +0,0 @@
-This code was shamelessly borrowed from GNU gzip before being hacked at.
diff --git a/isys/gzlib/binding.c b/isys/gzlib/binding.c
deleted file mode 100644
index f3871f11d..000000000
--- a/isys/gzlib/binding.c
+++ /dev/null
@@ -1,142 +0,0 @@
-#include <sys/signal.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <unistd.h>
-#include <stdlib.h>
-#include <sys/wait.h>
-
-#include "gzlib.h"
-
-int gunzip_main(int decompress);
-
-struct gzFile_s {
- int fd;
-};
-
-gzFile gunzip_dopen(int fd) {
- int p[2];
- void * oldsig;
- pid_t child;
- gzFile str;
- int ret;
-
- ret = pipe(p);
-
- oldsig = signal(SIGCLD, SIG_DFL);
-
- child = fork();
- if (!child) {
- if (fork()) exit(0);
-
- dup2(fd, 0);
- dup2(p[1], 1);
- close(p[0]);
- close(p[1]);
- if (fd > 2) close(fd);
- gunzip_main(1);
- exit(0);
- }
-
- waitpid(child, NULL, 0);
- signal(SIGCLD, oldsig);
-
- close(p[1]);
-
- str = malloc(sizeof(*str));
- str->fd = p[0];
-
- return str;
-}
-
-gzFile gunzip_open(const char * file) {
- int fd;
- gzFile rc;
-
- fd = open(file, O_RDONLY);
- if (fd == -1) return NULL;
-
- rc = gunzip_dopen(fd);
- close(fd);
-
- return rc;
-}
-
-gzFile gzip_dopen(int fd) {
- int p[2];
- void * oldsig;
- pid_t child;
- gzFile str;
- int ret;
-
- ret = pipe(p);
-
- oldsig = signal(SIGCLD, SIG_IGN);
-
- child = fork();
- if (!child) {
- if (fork()) exit(0);
-
- dup2(p[0], 0);
- dup2(fd, 1);
- close(p[0]);
- close(p[1]);
- if (fd > 2) close(fd);
- gunzip_main(0);
- exit(0);
- }
-
- waitpid(child, NULL, 0);
- signal(SIGCLD, oldsig);
-
- close(p[0]);
-
- str = malloc(sizeof(*str));
- str->fd = p[1];
-
- return str;
-}
-
-
-gzFile gzip_open(const char * file, int flags, int perms) {
- int fd;
- gzFile rc;
-
- fd = open(file, flags, perms);
- if (fd == -1) return NULL;
-
- rc = gzip_dopen(fd);
- close(fd);
-
- return rc;
-}
-
-int gunzip_read(gzFile str, void * buf, int bytes) {
- int pos = 0;
- int i = 0;
-
- while ((pos != bytes) &&
- (i = read(str->fd, ((char *) buf) + pos, bytes - pos)) > 0) {
- pos += i;
- }
-
- if (i < 0) return -1;
-
- return pos;
-}
-
-int gzip_write(gzFile str, void * buf, int bytes) {
- return write(str->fd, buf, bytes);
-}
-
-int gunzip_close(gzFile str) {
- close(str->fd);
-
- return 0;
-}
-
-int gzip_close(gzFile str) {
- close(str->fd);
-
- return 0;
-}
-
diff --git a/isys/gzlib/bits.c b/isys/gzlib/bits.c
deleted file mode 100644
index 3745a9ef3..000000000
--- a/isys/gzlib/bits.c
+++ /dev/null
@@ -1,206 +0,0 @@
-/* bits.c -- output variable-length bit strings
- * Copyright (C) 1992-1993 Jean-loup Gailly
- * This is free software; you can redistribute it and/or modify it under the
- * terms of the GNU General Public License, see the file COPYING.
- */
-
-
-/*
- * PURPOSE
- *
- * Output variable-length bit strings. Compression can be done
- * to a file or to memory. (The latter is not supported in this version.)
- *
- * DISCUSSION
- *
- * The PKZIP "deflate" file format interprets compressed file data
- * as a sequence of bits. Multi-bit strings in the file may cross
- * byte boundaries without restriction.
- *
- * The first bit of each byte is the low-order bit.
- *
- * The routines in this file allow a variable-length bit value to
- * be output right-to-left (useful for literal values). For
- * left-to-right output (useful for code strings from the tree routines),
- * the bits must have been reversed first with bi_reverse().
- *
- * For in-memory compression, the compressed bit stream goes directly
- * into the requested output buffer. The input data is read in blocks
- * by the mem_read() function. The buffer is limited to 64K on 16 bit
- * machines.
- *
- * INTERFACE
- *
- * void bi_init (FILE *zipfile)
- * Initialize the bit string routines.
- *
- * void send_bits (int value, int length)
- * Write out a bit string, taking the source bits right to
- * left.
- *
- * int bi_reverse (int value, int length)
- * Reverse the bits of a bit string, taking the source bits left to
- * right and emitting them right to left.
- *
- * void bi_windup (void)
- * Write out any remaining bits in an incomplete byte.
- *
- * void copy_block(char *buf, unsigned len, int header)
- * Copy a stored block to the zip file, storing first the length and
- * its one's complement if requested.
- *
- */
-
-#include <config.h>
-#include "tailor.h"
-#include "gzip.h"
-#include "crypt.h"
-
-#ifdef DEBUG
-# include <stdio.h>
-#endif
-
-#ifdef RCSID
-static char rcsid[] = "$Id$";
-#endif
-
-/* ===========================================================================
- * Local data used by the "bit string" routines.
- */
-
-local file_t zfile; /* output gzip file */
-
-local unsigned short bi_buf;
-/* Output buffer. bits are inserted starting at the bottom (least significant
- * bits).
- */
-
-#define Buf_size (8 * 2*sizeof(char))
-/* Number of bits used within bi_buf. (bi_buf might be implemented on
- * more than 16 bits on some systems.)
- */
-
-local int bi_valid;
-/* Number of valid bits in bi_buf. All bits above the last valid bit
- * are always zero.
- */
-
-int (*read_buf) OF((char *buf, unsigned size));
-/* Current input function. Set to mem_read for in-memory compression */
-
-#ifdef DEBUG
- off_t bits_sent; /* bit length of the compressed data */
-#endif
-
-/* ===========================================================================
- * Initialize the bit string routines.
- */
-void bi_init (zipfile)
- file_t zipfile; /* output zip file, NO_FILE for in-memory compression */
-{
- zfile = zipfile;
- bi_buf = 0;
- bi_valid = 0;
-#ifdef DEBUG
- bits_sent = 0L;
-#endif
-
- /* Set the defaults for file compression. They are set by memcompress
- * for in-memory compression.
- */
- if (zfile != NO_FILE) {
- read_buf = file_read;
- }
-}
-
-/* ===========================================================================
- * Send a value on a given number of bits.
- * IN assertion: length <= 16 and value fits in length bits.
- */
-void send_bits(value, length)
- int value; /* value to send */
- int length; /* number of bits */
-{
-#ifdef DEBUG
- Tracev((stderr," l %2d v %4x ", length, value));
- Assert(length > 0 && length <= 15, "invalid length");
- bits_sent += (off_t)length;
-#endif
- /* If not enough room in bi_buf, use (valid) bits from bi_buf and
- * (16 - bi_valid) bits from value, leaving (width - (16-bi_valid))
- * unused bits in value.
- */
- if (bi_valid > (int)Buf_size - length) {
- bi_buf |= (value << bi_valid);
- put_short(bi_buf);
- bi_buf = (ush)value >> (Buf_size - bi_valid);
- bi_valid += length - Buf_size;
- } else {
- bi_buf |= value << bi_valid;
- bi_valid += length;
- }
-}
-
-/* ===========================================================================
- * Reverse the first len bits of a code, using straightforward code (a faster
- * method would use a table)
- * IN assertion: 1 <= len <= 15
- */
-unsigned bi_reverse(code, len)
- unsigned code; /* the value to invert */
- int len; /* its bit length */
-{
- register unsigned res = 0;
- do {
- res |= code & 1;
- code >>= 1, res <<= 1;
- } while (--len > 0);
- return res >> 1;
-}
-
-/* ===========================================================================
- * Write out any remaining bits in an incomplete byte.
- */
-void bi_windup()
-{
- if (bi_valid > 8) {
- put_short(bi_buf);
- } else if (bi_valid > 0) {
- put_byte(bi_buf);
- }
- bi_buf = 0;
- bi_valid = 0;
-#ifdef DEBUG
- bits_sent = (bits_sent+7) & ~7;
-#endif
-}
-
-/* ===========================================================================
- * Copy a stored block to the zip file, storing first the length and its
- * one's complement if requested.
- */
-void copy_block(buf, len, header)
- char *buf; /* the input data */
- unsigned len; /* its length */
- int header; /* true if block header must be written */
-{
- bi_windup(); /* align on byte boundary */
-
- if (header) {
- put_short((ush)len);
- put_short((ush)~len);
-#ifdef DEBUG
- bits_sent += 2*16;
-#endif
- }
-#ifdef DEBUG
- bits_sent += (off_t)len<<3;
-#endif
- while (len--) {
-#ifdef CRYPT
- int t;
- if (key) zencode(*buf, t);
-#endif
- put_byte(*buf++);
- }
-}
diff --git a/isys/gzlib/config.h b/isys/gzlib/config.h
deleted file mode 100644
index f578992c2..000000000
--- a/isys/gzlib/config.h
+++ /dev/null
@@ -1,95 +0,0 @@
-/* config.h. Generated automatically by configure. */
-/* config.h.in. Generated automatically from configure.in by autoheader. */
-
-/* Define if on AIX 3.
- System headers sometimes define this.
- We just want to avoid a redefinition error message. */
-#ifndef _ALL_SOURCE
-/* #undef _ALL_SOURCE */
-#endif
-
-/* Define to empty if the keyword does not work. */
-/* #undef const */
-
-/* Define if on MINIX. */
-/* #undef _MINIX */
-
-/* Define to `long' if <sys/types.h> doesn't define. */
-/* #undef off_t */
-
-/* Define if the system does not provide POSIX.1 features except
- with this defined. */
-/* #undef _POSIX_1_SOURCE */
-
-/* Define if you need to in order for stat and other things to work. */
-/* #undef _POSIX_SOURCE */
-
-/* Define as the return type of signal handlers (int or void). */
-#define RETSIGTYPE void
-
-/* Define to `unsigned' if <sys/types.h> doesn't define. */
-/* #undef size_t */
-
-/* Define if you have the ANSI C header files. */
-#define STDC_HEADERS 1
-
-/* Define if you have the utime function. */
-#define HAVE_UTIME 1
-
-/* Define if you have the <dirent.h> header file. */
-#define HAVE_DIRENT_H 1
-
-/* Define if you have the <fcntl.h> header file. */
-#define HAVE_FCNTL_H 1
-
-/* Define if you have the <limits.h> header file. */
-#define HAVE_LIMITS_H 1
-
-/* Define if you have the <memory.h> header file. */
-#define HAVE_MEMORY_H 1
-
-/* Define if you have the <ndir.h> header file. */
-/* #undef HAVE_NDIR_H */
-
-/* Define if you have the <stdlib.h> header file. */
-#define HAVE_STDLIB_H 1
-
-/* Define if you have the <string.h> header file. */
-#define HAVE_STRING_H 1
-
-/* Define if you have the <sys/dir.h> header file. */
-/* #undef HAVE_SYS_DIR_H */
-
-/* Define if you have the <sys/ndir.h> header file. */
-/* #undef HAVE_SYS_NDIR_H */
-
-/* Define if you have the <sys/utime.h> header file. */
-/* #undef HAVE_SYS_UTIME_H */
-
-/* Define if you have the <time.h> header file. */
-#define HAVE_TIME_H 1
-
-/* Define if you have the <unistd.h> header file. */
-#define HAVE_UNISTD_H 1
-
-/* Define if you have the <utime.h> header file. */
-#define HAVE_UTIME_H 1
-
-/* Name of package */
-#define PACKAGE "gzip"
-
-/* Version number of package */
-#define VERSION "1.3"
-
-/* Number of bits in a file offset, on hosts where this is settable. */
-#define _FILE_OFFSET_BITS 64
-
-/* Define to make fseeko etc. visible, on some hosts. */
-/* #undef _LARGEFILE_SOURCE */
-
-/* Define for large files, on AIX-style hosts. */
-/* #undef _LARGE_FILES */
-
-/* Define if an assembler version of longest_match is available. */
-/* #undef ASMV */
-
diff --git a/isys/gzlib/deflate.c b/isys/gzlib/deflate.c
deleted file mode 100644
index 9bd5358e1..000000000
--- a/isys/gzlib/deflate.c
+++ /dev/null
@@ -1,761 +0,0 @@
-/* deflate.c -- compress data using the deflation algorithm
- * Copyright (C) 1992-1993 Jean-loup Gailly
- * This is free software; you can redistribute it and/or modify it under the
- * terms of the GNU General Public License, see the file COPYING.
- */
-
-/*
- * PURPOSE
- *
- * Identify new text as repetitions of old text within a fixed-
- * length sliding window trailing behind the new text.
- *
- * DISCUSSION
- *
- * The "deflation" process depends on being able to identify portions
- * of the input text which are identical to earlier input (within a
- * sliding window trailing behind the input currently being processed).
- *
- * The most straightforward technique turns out to be the fastest for
- * most input files: try all possible matches and select the longest.
- * The key feature of this algorithm is that insertions into the string
- * dictionary are very simple and thus fast, and deletions are avoided
- * completely. Insertions are performed at each input character, whereas
- * string matches are performed only when the previous match ends. So it
- * is preferable to spend more time in matches to allow very fast string
- * insertions and avoid deletions. The matching algorithm for small
- * strings is inspired from that of Rabin & Karp. A brute force approach
- * is used to find longer strings when a small match has been found.
- * A similar algorithm is used in comic (by Jan-Mark Wams) and freeze
- * (by Leonid Broukhis).
- * A previous version of this file used a more sophisticated algorithm
- * (by Fiala and Greene) which is guaranteed to run in linear amortized
- * time, but has a larger average cost, uses more memory and is patented.
- * However the F&G algorithm may be faster for some highly redundant
- * files if the parameter max_chain_length (described below) is too large.
- *
- * ACKNOWLEDGEMENTS
- *
- * The idea of lazy evaluation of matches is due to Jan-Mark Wams, and
- * I found it in 'freeze' written by Leonid Broukhis.
- * Thanks to many info-zippers for bug reports and testing.
- *
- * REFERENCES
- *
- * APPNOTE.TXT documentation file in PKZIP 1.93a distribution.
- *
- * A description of the Rabin and Karp algorithm is given in the book
- * "Algorithms" by R. Sedgewick, Addison-Wesley, p252.
- *
- * Fiala,E.R., and Greene,D.H.
- * Data Compression with Finite Windows, Comm.ACM, 32,4 (1989) 490-595
- *
- * INTERFACE
- *
- * void lm_init (int pack_level, ush *flags)
- * Initialize the "longest match" routines for a new file
- *
- * off_t deflate (void)
- * Processes a new input file and return its compressed length. Sets
- * the compressed length, crc, deflate flags and internal file
- * attributes.
- */
-
-#include <config.h>
-#include <stdio.h>
-
-#include "tailor.h"
-#include "gzip.h"
-#include "lzw.h" /* just for consistency checking */
-
-#ifdef RCSID
-static char rcsid[] = "$Id$";
-#endif
-
-/* ===========================================================================
- * Configuration parameters
- */
-
-/* Compile with MEDIUM_MEM to reduce the memory requirements or
- * with SMALL_MEM to use as little memory as possible. Use BIG_MEM if the
- * entire input file can be held in memory (not possible on 16 bit systems).
- * Warning: defining these symbols affects HASH_BITS (see below) and thus
- * affects the compression ratio. The compressed output
- * is still correct, and might even be smaller in some cases.
- */
-
-#ifdef SMALL_MEM
-# define HASH_BITS 13 /* Number of bits used to hash strings */
-#endif
-#ifdef MEDIUM_MEM
-# define HASH_BITS 14
-#endif
-#ifndef HASH_BITS
-# define HASH_BITS 15
- /* For portability to 16 bit machines, do not use values above 15. */
-#endif
-
-/* To save space (see unlzw.c), we overlay prev+head with tab_prefix and
- * window with tab_suffix. Check that we can do this:
- */
-#if (WSIZE<<1) > (1<<BITS)
- error: cannot overlay window with tab_suffix and prev with tab_prefix0
-#endif
-#if HASH_BITS > BITS-1
- error: cannot overlay head with tab_prefix1
-#endif
-
-#define HASH_SIZE (unsigned)(1<<HASH_BITS)
-#define HASH_MASK (HASH_SIZE-1)
-#define WMASK (WSIZE-1)
-/* HASH_SIZE and WSIZE must be powers of two */
-
-#define NIL 0
-/* Tail of hash chains */
-
-#define FAST 4
-#define SLOW 2
-/* speed options for the general purpose bit flag */
-
-#ifndef TOO_FAR
-# define TOO_FAR 4096
-#endif
-/* Matches of length 3 are discarded if their distance exceeds TOO_FAR */
-
-/* ===========================================================================
- * Local data used by the "longest match" routines.
- */
-
-typedef ush Pos;
-typedef unsigned IPos;
-/* A Pos is an index in the character window. We use short instead of int to
- * save space in the various tables. IPos is used only for parameter passing.
- */
-
-/* DECLARE(uch, window, 2L*WSIZE); */
-/* Sliding window. Input bytes are read into the second half of the window,
- * and move to the first half later to keep a dictionary of at least WSIZE
- * bytes. With this organization, matches are limited to a distance of
- * WSIZE-MAX_MATCH bytes, but this ensures that IO is always
- * performed with a length multiple of the block size. Also, it limits
- * the window size to 64K, which is quite useful on MSDOS.
- * To do: limit the window size to WSIZE+BSZ if SMALL_MEM (the code would
- * be less efficient).
- */
-
-/* DECLARE(Pos, prev, WSIZE); */
-/* Link to older string with same hash index. To limit the size of this
- * array to 64K, this link is maintained only for the last 32K strings.
- * An index in this array is thus a window index modulo 32K.
- */
-
-/* DECLARE(Pos, head, 1<<HASH_BITS); */
-/* Heads of the hash chains or NIL. */
-
-ulg window_size = (ulg)2*WSIZE;
-/* window size, 2*WSIZE except for MMAP or BIG_MEM, where it is the
- * input file length plus MIN_LOOKAHEAD.
- */
-
-long block_start;
-/* window position at the beginning of the current output block. Gets
- * negative when the window is moved backwards.
- */
-
-local unsigned ins_h; /* hash index of string to be inserted */
-
-#define H_SHIFT ((HASH_BITS+MIN_MATCH-1)/MIN_MATCH)
-/* Number of bits by which ins_h and del_h must be shifted at each
- * input step. It must be such that after MIN_MATCH steps, the oldest
- * byte no longer takes part in the hash key, that is:
- * H_SHIFT * MIN_MATCH >= HASH_BITS
- */
-
-unsigned int near prev_length;
-/* Length of the best match at previous step. Matches not greater than this
- * are discarded. This is used in the lazy match evaluation.
- */
-
- unsigned near strstart; /* start of string to insert */
- unsigned near match_start; /* start of matching string */
-local int eofile; /* flag set at end of input file */
-local unsigned lookahead; /* number of valid bytes ahead in window */
-
-unsigned near max_chain_length;
-/* To speed up deflation, hash chains are never searched beyond this length.
- * A higher limit improves compression ratio but degrades the speed.
- */
-
-local unsigned int max_lazy_match;
-/* Attempt to find a better match only when the current match is strictly
- * smaller than this value. This mechanism is used only for compression
- * levels >= 4.
- */
-#define max_insert_length max_lazy_match
-/* Insert new strings in the hash table only if the match length
- * is not greater than this length. This saves time but degrades compression.
- * max_insert_length is used only for compression levels <= 3.
- */
-
-local int compr_level;
-/* compression level (1..9) */
-
-unsigned near good_match;
-/* Use a faster search when the previous match is longer than this */
-
-
-/* Values for max_lazy_match, good_match and max_chain_length, depending on
- * the desired pack level (0..9). The values given below have been tuned to
- * exclude worst case performance for pathological files. Better values may be
- * found for specific files.
- */
-
-typedef struct config {
- ush good_length; /* reduce lazy search above this match length */
- ush max_lazy; /* do not perform lazy search above this match length */
- ush nice_length; /* quit search above this match length */
- ush max_chain;
-} config;
-
-#ifdef FULL_SEARCH
-# define nice_match MAX_MATCH
-#else
- int near nice_match; /* Stop searching when current match exceeds this */
-#endif
-
-local config configuration_table[10] = {
-/* good lazy nice chain */
-/* 0 */ {0, 0, 0, 0}, /* store only */
-/* 1 */ {4, 4, 8, 4}, /* maximum speed, no lazy matches */
-/* 2 */ {4, 5, 16, 8},
-/* 3 */ {4, 6, 32, 32},
-
-/* 4 */ {4, 4, 16, 16}, /* lazy matches */
-/* 5 */ {8, 16, 32, 32},
-/* 6 */ {8, 16, 128, 128},
-/* 7 */ {8, 32, 128, 256},
-/* 8 */ {32, 128, 258, 1024},
-/* 9 */ {32, 258, 258, 4096}}; /* maximum compression */
-
-/* Note: the deflate() code requires max_lazy >= MIN_MATCH and max_chain >= 4
- * For deflate_fast() (levels <= 3) good is ignored and lazy has a different
- * meaning.
- */
-
-#define EQUAL 0
-/* result of memcmp for equal strings */
-
-/* ===========================================================================
- * Prototypes for local functions.
- */
-local void fill_window OF((void));
-local off_t deflate_fast OF((void));
-
- int longest_match OF((IPos cur_match));
-#ifdef ASMV
- void match_init OF((void)); /* asm code initialization */
-#endif
-
-#ifdef DEBUG
-local void check_match OF((IPos start, IPos match, int length));
-#endif
-
-/* ===========================================================================
- * Update a hash value with the given input byte
- * IN assertion: all calls to to UPDATE_HASH are made with consecutive
- * input characters, so that a running hash key can be computed from the
- * previous key instead of complete recalculation each time.
- */
-#define UPDATE_HASH(h,c) (h = (((h)<<H_SHIFT) ^ (c)) & HASH_MASK)
-
-/* ===========================================================================
- * Insert string s in the dictionary and set match_head to the previous head
- * of the hash chain (the most recent string with same hash key). Return
- * the previous length of the hash chain.
- * IN assertion: all calls to to INSERT_STRING are made with consecutive
- * input characters and the first MIN_MATCH bytes of s are valid
- * (except for the last MIN_MATCH-1 bytes of the input file).
- */
-#define INSERT_STRING(s, match_head) \
- (UPDATE_HASH(ins_h, window[(s) + MIN_MATCH-1]), \
- prev[(s) & WMASK] = match_head = head[ins_h], \
- head[ins_h] = (s))
-
-/* ===========================================================================
- * Initialize the "longest match" routines for a new file
- */
-void lm_init (pack_level, flags)
- int pack_level; /* 0: store, 1: best speed, 9: best compression */
- ush *flags; /* general purpose bit flag */
-{
- register unsigned j;
-
- if (pack_level < 1 || pack_level > 9) warning("bad pack level");
- compr_level = pack_level;
-
- /* Initialize the hash table. */
-#if defined(MAXSEG_64K) && HASH_BITS == 15
- for (j = 0; j < HASH_SIZE; j++) head[j] = NIL;
-#else
- memzero((char*)head, HASH_SIZE*sizeof(*head));
-#endif
- /* prev will be initialized on the fly */
-
- /* Set the default configuration parameters:
- */
- max_lazy_match = configuration_table[pack_level].max_lazy;
- good_match = configuration_table[pack_level].good_length;
-#ifndef FULL_SEARCH
- nice_match = configuration_table[pack_level].nice_length;
-#endif
- max_chain_length = configuration_table[pack_level].max_chain;
- if (pack_level == 1) {
- *flags |= FAST;
- } else if (pack_level == 9) {
- *flags |= SLOW;
- }
- /* ??? reduce max_chain_length for binary files */
-
- strstart = 0;
- block_start = 0L;
-#ifdef ASMV
- match_init(); /* initialize the asm code */
-#endif
-
- lookahead = read_buf((char*)window,
- sizeof(int) <= 2 ? (unsigned)WSIZE : 2*WSIZE);
-
- if (lookahead == 0 || lookahead == (unsigned)EOF) {
- eofile = 1, lookahead = 0;
- return;
- }
- eofile = 0;
- /* Make sure that we always have enough lookahead. This is important
- * if input comes from a device such as a tty.
- */
- while (lookahead < MIN_LOOKAHEAD && !eofile) fill_window();
-
- ins_h = 0;
- for (j=0; j<MIN_MATCH-1; j++) UPDATE_HASH(ins_h, window[j]);
- /* If lookahead < MIN_MATCH, ins_h is garbage, but this is
- * not important since only literal bytes will be emitted.
- */
-}
-
-/* ===========================================================================
- * Set match_start to the longest match starting at the given string and
- * return its length. Matches shorter or equal to prev_length are discarded,
- * in which case the result is equal to prev_length and match_start is
- * garbage.
- * IN assertions: cur_match is the head of the hash chain for the current
- * string (strstart) and its distance is <= MAX_DIST, and prev_length >= 1
- */
-#ifndef ASMV
-/* For MSDOS, OS/2 and 386 Unix, an optimized version is in match.asm or
- * match.s. The code is functionally equivalent, so you can use the C version
- * if desired.
- */
-int longest_match(cur_match)
- IPos cur_match; /* current match */
-{
- unsigned chain_length = max_chain_length; /* max hash chain length */
- register uch *scan = window + strstart; /* current string */
- register uch *match; /* matched string */
- register int len; /* length of current match */
- int best_len = prev_length; /* best match length so far */
- IPos limit = strstart > (IPos)MAX_DIST ? strstart - (IPos)MAX_DIST : NIL;
- /* Stop when cur_match becomes <= limit. To simplify the code,
- * we prevent matches with the string of window index 0.
- */
-
-/* The code is optimized for HASH_BITS >= 8 and MAX_MATCH-2 multiple of 16.
- * It is easy to get rid of this optimization if necessary.
- */
-#if HASH_BITS < 8 || MAX_MATCH != 258
- error: Code too clever
-#endif
-
-#ifdef UNALIGNED_OK
- /* Compare two bytes at a time. Note: this is not always beneficial.
- * Try with and without -DUNALIGNED_OK to check.
- */
- register uch *strend = window + strstart + MAX_MATCH - 1;
- register ush scan_start = *(ush*)scan;
- register ush scan_end = *(ush*)(scan+best_len-1);
-#else
- register uch *strend = window + strstart + MAX_MATCH;
- register uch scan_end1 = scan[best_len-1];
- register uch scan_end = scan[best_len];
-#endif
-
- /* Do not waste too much time if we already have a good match: */
- if (prev_length >= good_match) {
- chain_length >>= 2;
- }
- Assert(strstart <= window_size-MIN_LOOKAHEAD, "insufficient lookahead");
-
- do {
- Assert(cur_match < strstart, "no future");
- match = window + cur_match;
-
- /* Skip to next match if the match length cannot increase
- * or if the match length is less than 2:
- */
-#if (defined(UNALIGNED_OK) && MAX_MATCH == 258)
- /* This code assumes sizeof(unsigned short) == 2. Do not use
- * UNALIGNED_OK if your compiler uses a different size.
- */
- if (*(ush*)(match+best_len-1) != scan_end ||
- *(ush*)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
- * 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
- * necessary to put more guard bytes at the end of the window, or
- * to check more often for insufficient lookahead.
- */
- scan++, match++;
- do {
- } while (*(ush*)(scan+=2) == *(ush*)(match+=2) &&
- *(ush*)(scan+=2) == *(ush*)(match+=2) &&
- *(ush*)(scan+=2) == *(ush*)(match+=2) &&
- *(ush*)(scan+=2) == *(ush*)(match+=2) &&
- scan < strend);
- /* The funny "do {}" generates better code on most compilers */
-
- /* Here, scan <= window+strstart+257 */
- Assert(scan <= window+(unsigned)(window_size-1), "wild scan");
- if (*scan == *match) 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;
-
- /* 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
- * the hash keys are equal and that HASH_BITS >= 8.
- */
- scan += 2, match++;
-
- /* We check for insufficient lookahead only every 8th comparison;
- * the 256th check will be made at strstart+258.
- */
- do {
- } while (*++scan == *++match && *++scan == *++match &&
- *++scan == *++match && *++scan == *++match &&
- *++scan == *++match && *++scan == *++match &&
- *++scan == *++match && *++scan == *++match &&
- scan < strend);
-
- len = MAX_MATCH - (int)(strend - scan);
- scan = strend - MAX_MATCH;
-
-#endif /* UNALIGNED_OK */
-
- if (len > best_len) {
- match_start = cur_match;
- best_len = len;
- if (len >= nice_match) break;
-#ifdef UNALIGNED_OK
- scan_end = *(ush*)(scan+best_len-1);
-#else
- scan_end1 = scan[best_len-1];
- scan_end = scan[best_len];
-#endif
- }
- } while ((cur_match = prev[cur_match & WMASK]) > limit
- && --chain_length != 0);
-
- return best_len;
-}
-#endif /* ASMV */
-
-#ifdef DEBUG
-/* ===========================================================================
- * Check that the match at match_start is indeed a match.
- */
-local void check_match(start, match, length)
- IPos start, match;
- int length;
-{
- /* check that the match is indeed a match */
- if (memcmp((char*)window + match,
- (char*)window + start, length) != EQUAL) {
- fprintf(stderr,
- " start %d, match %d, length %d\n",
- start, match, length);
- warning("invalid match");
- }
- if (verbose > 1) {
- fprintf(stderr,"\\[%d,%d]", start-match, length);
- do { putc(window[start++], stderr); } while (--length != 0);
- }
-}
-#else
-# define check_match(start, match, length)
-#endif
-
-/* ===========================================================================
- * Fill the window when the lookahead becomes insufficient.
- * Updates strstart and lookahead, and sets eofile if end of input file.
- * IN assertion: lookahead < MIN_LOOKAHEAD && strstart + lookahead > 0
- * OUT assertions: at least one byte has been read, or eofile is set;
- * file reads are performed for at least two bytes (required for the
- * translate_eol option).
- */
-local void fill_window()
-{
- register unsigned n, m;
- unsigned more = (unsigned)(window_size - (ulg)lookahead - (ulg)strstart);
- /* Amount of free space at the end of the window. */
-
- /* 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 (more == (unsigned)EOF) {
- /* Very unlikely, but possible on 16 bit machine if strstart == 0
- * and lookahead == 1 (input done one byte at time)
- */
- more--;
- } else if (strstart >= WSIZE+MAX_DIST) {
- /* By the IN assertion, the window is not empty so we can't confuse
- * more == 0 with more == 64K on a 16 bit machine.
- */
- Assert(window_size == (ulg)2*WSIZE, "no sliding with BIG_MEM");
-
- memcpy((char*)window, (char*)window+WSIZE, (unsigned)WSIZE);
- match_start -= WSIZE;
- strstart -= WSIZE; /* we now have strstart >= MAX_DIST: */
-
- block_start -= (long) WSIZE;
-
- for (n = 0; n < HASH_SIZE; n++) {
- m = head[n];
- head[n] = (Pos)(m >= WSIZE ? m-WSIZE : NIL);
- }
- for (n = 0; n < WSIZE; n++) {
- m = prev[n];
- prev[n] = (Pos)(m >= WSIZE ? m-WSIZE : NIL);
- /* If n is not on any hash chain, prev[n] is garbage but
- * its value will never be used.
- */
- }
- more += WSIZE;
- }
- /* At this point, more >= 2 */
- if (!eofile) {
- n = read_buf((char*)window+strstart+lookahead, more);
- if (n == 0 || n == (unsigned)EOF) {
- eofile = 1;
- } else {
- lookahead += n;
- }
- }
-}
-
-/* ===========================================================================
- * Flush the current block, with given end-of-file flag.
- * IN assertion: strstart is set to the end of the current match.
- */
-#define FLUSH_BLOCK(eof) \
- flush_block(block_start >= 0L ? (char*)&window[(unsigned)block_start] : \
- (char*)NULL, (long)strstart - block_start, (eof))
-
-/* ===========================================================================
- * Processes a new input file and return its compressed length. This
- * function does not perform lazy evaluationof matches and inserts
- * new strings in the dictionary only for unmatched strings or for short
- * matches. It is used only for the fast compression options.
- */
-local off_t deflate_fast()
-{
- IPos hash_head; /* head of the hash chain */
- int flush; /* set if current block must be flushed */
- unsigned match_length = 0; /* length of best match */
-
- prev_length = MIN_MATCH-1;
- while (lookahead != 0) {
- /* Insert the string window[strstart .. strstart+2] in the
- * dictionary, and set hash_head to the head of the hash chain:
- */
- INSERT_STRING(strstart, hash_head);
-
- /* Find the longest match, discarding those <= prev_length.
- * At this point we have always match_length < MIN_MATCH
- */
- if (hash_head != NIL && strstart - hash_head <= MAX_DIST) {
- /* To simplify the code, we prevent matches with the string
- * of window index 0 (in particular we have to avoid a match
- * of the string with itself at the start of the input file).
- */
- match_length = longest_match (hash_head);
- /* longest_match() sets match_start */
- if (match_length > lookahead) match_length = lookahead;
- }
- if (match_length >= MIN_MATCH) {
- check_match(strstart, match_start, match_length);
-
- flush = ct_tally(strstart-match_start, match_length - MIN_MATCH);
-
- lookahead -= match_length;
-
- /* Insert new strings in the hash table only if the match length
- * is not too large. This saves time but degrades compression.
- */
- if (match_length <= max_insert_length) {
- match_length--; /* string at strstart already in hash table */
- do {
- strstart++;
- INSERT_STRING(strstart, hash_head);
- /* strstart never exceeds WSIZE-MAX_MATCH, so there are
- * always MIN_MATCH bytes ahead. If lookahead < MIN_MATCH
- * these bytes are garbage, but it does not matter since
- * the next lookahead bytes will be emitted as literals.
- */
- } while (--match_length != 0);
- strstart++;
- } else {
- strstart += match_length;
- match_length = 0;
- ins_h = window[strstart];
- UPDATE_HASH(ins_h, window[strstart+1]);
-#if MIN_MATCH != 3
- Call UPDATE_HASH() MIN_MATCH-3 more times
-#endif
- }
- } else {
- /* No match, output a literal byte */
- Tracevv((stderr,"%c",window[strstart]));
- flush = ct_tally (0, window[strstart]);
- lookahead--;
- strstart++;
- }
- if (flush) FLUSH_BLOCK(0), block_start = strstart;
-
- /* Make sure that we always have enough lookahead, except
- * at the end of the input file. We need MAX_MATCH bytes
- * for the next match, plus MIN_MATCH bytes to insert the
- * string following the next match.
- */
- while (lookahead < MIN_LOOKAHEAD && !eofile) fill_window();
-
- }
- return FLUSH_BLOCK(1); /* eof */
-}
-
-/* ===========================================================================
- * Same as above, but achieves better compression. We use a lazy
- * evaluation for matches: a match is finally adopted only if there is
- * no better match at the next window position.
- */
-off_t deflate()
-{
- IPos hash_head; /* head of hash chain */
- IPos prev_match; /* previous match */
- int flush; /* set if current block must be flushed */
- int match_available = 0; /* set if previous match exists */
- register unsigned match_length = MIN_MATCH-1; /* length of best match */
-
- if (compr_level <= 3) return deflate_fast(); /* optimized for speed */
-
- /* Process the input block. */
- while (lookahead != 0) {
- /* Insert the string window[strstart .. strstart+2] in the
- * dictionary, and set hash_head to the head of the hash chain:
- */
- INSERT_STRING(strstart, hash_head);
-
- /* Find the longest match, discarding those <= prev_length.
- */
- prev_length = match_length, prev_match = match_start;
- match_length = MIN_MATCH-1;
-
- if (hash_head != NIL && prev_length < max_lazy_match &&
- strstart - hash_head <= MAX_DIST) {
- /* To simplify the code, we prevent matches with the string
- * of window index 0 (in particular we have to avoid a match
- * of the string with itself at the start of the input file).
- */
- match_length = longest_match (hash_head);
- /* longest_match() sets match_start */
- if (match_length > lookahead) match_length = lookahead;
-
- /* Ignore a length 3 match if it is too distant: */
- if (match_length == MIN_MATCH && strstart-match_start > TOO_FAR){
- /* If prev_match is also MIN_MATCH, match_start is garbage
- * but we will ignore the current match anyway.
- */
- match_length--;
- }
- }
- /* If there was a match at the previous step and the current
- * match is not better, output the previous match:
- */
- if (prev_length >= MIN_MATCH && match_length <= prev_length) {
-
- check_match(strstart-1, prev_match, prev_length);
-
- flush = ct_tally(strstart-1-prev_match, prev_length - MIN_MATCH);
-
- /* Insert in hash table all strings up to the end of the match.
- * strstart-1 and strstart are already inserted.
- */
- lookahead -= prev_length-1;
- prev_length -= 2;
- do {
- strstart++;
- INSERT_STRING(strstart, hash_head);
- /* strstart never exceeds WSIZE-MAX_MATCH, so there are
- * always MIN_MATCH bytes ahead. If lookahead < MIN_MATCH
- * these bytes are garbage, but it does not matter since the
- * next lookahead bytes will always be emitted as literals.
- */
- } while (--prev_length != 0);
- match_available = 0;
- match_length = MIN_MATCH-1;
- strstart++;
- if (flush) FLUSH_BLOCK(0), block_start = strstart;
-
- } else if (match_available) {
- /* If there was no match at the previous position, output a
- * single literal. If there was a match but the current match
- * is longer, truncate the previous match to a single literal.
- */
- Tracevv((stderr,"%c",window[strstart-1]));
- if (ct_tally (0, window[strstart-1])) {
- FLUSH_BLOCK(0), block_start = strstart;
- }
- strstart++;
- lookahead--;
- } else {
- /* There is no previous match to compare with, wait for
- * the next step to decide.
- */
- match_available = 1;
- strstart++;
- lookahead--;
- }
- Assert (strstart <= bytes_in && lookahead <= bytes_in, "a bit too far");
-
- /* Make sure that we always have enough lookahead, except
- * at the end of the input file. We need MAX_MATCH bytes
- * for the next match, plus MIN_MATCH bytes to insert the
- * string following the next match.
- */
- while (lookahead < MIN_LOOKAHEAD && !eofile) fill_window();
- }
- if (match_available) ct_tally (0, window[strstart-1]);
-
- return FLUSH_BLOCK(1); /* eof */
-}
diff --git a/isys/gzlib/gzip.c b/isys/gzlib/gzip.c
deleted file mode 100644
index 77eb3f256..000000000
--- a/isys/gzlib/gzip.c
+++ /dev/null
@@ -1,536 +0,0 @@
-/* gzip (GNU zip) -- compress files with zip algorithm and 'compress' interface
- * Copyright (C) 1992-1993 Jean-loup Gailly
- * The unzip code was written and put in the public domain by Mark Adler.
- * Portions of the lzw code are derived from the public domain 'compress'
- * written by Spencer Thomas, Joe Orost, James Woods, Jim McKie, Steve Davies,
- * Ken Turkowski, Dave Mack and Peter Jannesen.
- *
- * See the license_msg below and the file COPYING for the software license.
- * See the file algorithm.doc for the compression algorithms and file formats.
- */
-
-
-/* Compress files with zip algorithm and 'compress' interface.
- * See usage() and help() functions below for all options.
- * Outputs:
- * file.gz: compressed file with same mode, owner, and utimes
- * or stdout with -c option or if stdin used as input.
- * If the output file name had to be truncated, the original name is kept
- * in the compressed file.
- * On MSDOS, file.tmp -> file.tmz. On VMS, file.tmp -> file.tmp-gz.
- *
- * Using gz on MSDOS would create too many file name conflicts. For
- * example, foo.txt -> foo.tgz (.tgz must be reserved as shorthand for
- * tar.gz). Similarly, foo.dir and foo.doc would both be mapped to foo.dgz.
- * I also considered 12345678.txt -> 12345txt.gz but this truncates the name
- * too heavily. There is no ideal solution given the MSDOS 8+3 limitation.
- *
- * For the meaning of all compilation flags, see comments in Makefile.in.
- */
-
-#ifdef RCSID
-static char rcsid[] = "$Id$";
-#endif
-
-#include <config.h>
-#include <ctype.h>
-#include <sys/types.h>
-#include <signal.h>
-#include <sys/stat.h>
-#include <errno.h>
-
-#include "tailor.h"
-#include "gzip.h"
-#include "lzw.h"
-
- /* configuration */
-
-#ifdef HAVE_TIME_H
-# include <time.h>
-#else
-# include <sys/time.h>
-#endif
-
-#ifdef HAVE_FCNTL_H
-# include <fcntl.h>
-#endif
-
-#ifdef HAVE_LIMITS_H
-# include <limits.h>
-#endif
-
-#ifdef HAVE_UNISTD_H
-# include <unistd.h>
-#endif
-
-#if defined STDC_HEADERS || defined HAVE_STDLIB_H
-# include <stdlib.h>
-#endif
-
-#ifdef HAVE_DIRENT_H
-# include <dirent.h>
-# define NAMLEN(direct) strlen((direct)->d_name)
-# define DIR_OPT "DIRENT"
-#else
-# define dirent direct
-# define NAMLEN(direct) ((direct)->d_namlen)
-# ifdef HAVE_SYS_NDIR_H
-# include <sys/ndir.h>
-# define DIR_OPT "SYS_NDIR"
-# endif
-# ifdef HAVE_SYS_DIR_H
-# include <sys/dir.h>
-# define DIR_OPT "SYS_DIR"
-# endif
-# ifdef HAVE_NDIR_H
-# include <ndir.h>
-# define DIR_OPT "NDIR"
-# endif
-# ifndef DIR_OPT
-# define DIR_OPT "NO_DIR"
-# endif
-#endif
-
-#ifdef CLOSEDIR_VOID
-# define CLOSEDIR(d) (closedir(d), 0)
-#else
-# define CLOSEDIR(d) closedir(d)
-#endif
-
-#ifdef HAVE_UTIME
-# ifdef HAVE_UTIME_H
-# include <utime.h>
-# define TIME_OPT "UTIME"
-# else
-# ifdef HAVE_SYS_UTIME_H
-# include <sys/utime.h>
-# define TIME_OPT "SYS_UTIME"
-# else
- struct utimbuf {
- time_t actime;
- time_t modtime;
- };
-# define TIME_OPT "STRUCT_UTIMBUF"
-# endif
-# endif
-#else
-# define TIME_OPT "NO_UTIME"
-#endif
-
-#if !defined(S_ISDIR) && defined(S_IFDIR)
-# define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
-#endif
-#if !defined(S_ISREG) && defined(S_IFREG)
-# define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
-#endif
-
-typedef RETSIGTYPE (*sig_type) OF((int));
-
-#ifndef O_BINARY
-# define O_BINARY 0 /* creation mode for open() */
-#endif
-
-#ifndef O_CREAT
- /* Pure BSD system? */
-# include <sys/file.h>
-# ifndef O_CREAT
-# define O_CREAT FCREAT
-# endif
-# ifndef O_EXCL
-# define O_EXCL FEXCL
-# endif
-#endif
-
-#ifndef S_IRUSR
-# define S_IRUSR 0400
-#endif
-#ifndef S_IWUSR
-# define S_IWUSR 0200
-#endif
-#define RW_USER (S_IRUSR | S_IWUSR) /* creation mode for open() */
-
-#ifndef MAX_PATH_LEN
-# define MAX_PATH_LEN 1024 /* max pathname length */
-#endif
-
-#ifndef SEEK_END
-# define SEEK_END 2
-#endif
-
-#ifndef CHAR_BIT
-# define CHAR_BIT 8
-#endif
-
-#ifdef off_t
- off_t lseek OF((int fd, off_t offset, int whence));
-#endif
-
-#ifndef OFF_T_MIN
-#define OFF_T_MIN (~ (off_t) 0 << (sizeof (off_t) * CHAR_BIT - 1))
-#endif
-
-#ifndef OFF_T_MAX
-#define OFF_T_MAX (~ (off_t) 0 - OFF_T_MIN)
-#endif
-
- /* global buffers */
-
-DECLARE(uch, inbuf, INBUFSIZ +INBUF_EXTRA);
-DECLARE(uch, outbuf, OUTBUFSIZ+OUTBUF_EXTRA);
-DECLARE(ush, d_buf, DIST_BUFSIZE);
-DECLARE(uch, window, 2L*WSIZE);
-#ifndef MAXSEG_64K
- DECLARE(ush, tab_prefix, 1L<<BITS);
-#else
- DECLARE(ush, tab_prefix0, 1L<<(BITS-1));
- DECLARE(ush, tab_prefix1, 1L<<(BITS-1));
-#endif
-
- /* local variables */
-
-long block_start;
-unsigned strstart; /* start of string to insert */
-
-int to_stdout = 0; /* output to stdout (-c) */
-int decompress = 0; /* decompress (-d) */
-int force = 1; /* don't ask questions, compress links (-f) */
-int no_name = -1; /* don't save or restore the original file name */
-int no_time = -1; /* don't save or restore the original file time */
-int recursive = 0; /* recurse through directories (-r) */
-int list = 0; /* list the file contents (-l) */
-int quiet = 0; /* be very quiet (-q) */
-int do_lzw = 0; /* generate output compatible with old compress (-Z) */
-int test = 0; /* test .gz file integrity */
-int foreground; /* set if program run in foreground */
-char *progname = "gzlib";
-int maxbits = BITS; /* max bits per code for LZW */
-int method = DEFLATED;/* compression method */
-int level = 6; /* compression level */
-int exit_code = OK; /* program exit code */
-int last_member; /* set for .zip and .Z files */
-int part_nb; /* number of parts in .gz file */
-time_t time_stamp; /* original time stamp (modification time) */
-off_t ifile_size; /* input file size, -1 for devices (debug only) */
-char *env; /* contents of GZIP env variable */
-char **args = NULL; /* argv pointer if GZIP env variable defined */
-char *z_suffix; /* default suffix (can be set with --suffix) */
-int z_len; /* strlen(z_suffix) */
-
-off_t bytes_in; /* number of input bytes */
-off_t bytes_out; /* number of output bytes */
-off_t total_in; /* input bytes for all files */
-off_t total_out; /* output bytes for all files */
-char ifname[MAX_PATH_LEN]; /* input file name */
-char ofname[MAX_PATH_LEN]; /* output file name */
-int remove_ofname = 0; /* remove output file on error */
-struct stat istat; /* status for input file */
-int ifd; /* input file descriptor */
-int ofd; /* output file descriptor */
-unsigned insize; /* valid bytes in inbuf */
-unsigned inptr; /* index of next byte to be processed in inbuf */
-unsigned outcnt; /* bytes in output buffer */
-
-/* local functions */
-
-local int input_eof OF((void));
-local void treat_stdin OF((void));
-local int get_method OF((int in));
-local void do_exit OF((int exitcode));
-int (*work) OF((int infile, int outfile)) = zip;
-
-#define strequ(s1, s2) (strcmp((s1),(s2)) == 0)
-
-local void progerror (char * string) __attribute__ ((unused));
-
-local void progerror (string)
- char *string;
-{
- int e = errno;
- fprintf(stderr, "%s: ", progname);
- errno = e;
- perror(string);
- exit_code = ERROR;
-}
-
-/* ======================================================================== */
-int gunzip_main (int do_decompress_arg)
-{
- int file_count; /* number of files to precess */
- int proglen; /* length of progname */
- int optc __attribute__ ((unused)); /* current option */
- int argc __attribute__ ((unused)) = 1;
- char *argv[] __attribute__ ((unused)) = { "gunzip ", NULL };
-
- EXPAND(argc, argv); /* wild card expansion if necessary */
-
- proglen = strlen(progname);
-
- /* Suppress .exe for MSDOS, OS/2 and VMS: */
- if (proglen > 4 && strequ(progname+proglen-4, ".exe")) {
- progname[proglen-4] = '\0';
- }
-
- foreground = signal(SIGINT, SIG_IGN) != SIG_IGN;
- if (foreground) {
- (void) signal (SIGINT, (sig_type)abort_gzip);
- }
-#ifdef SIGTERM
- if (signal(SIGTERM, SIG_IGN) != SIG_IGN) {
- (void) signal(SIGTERM, (sig_type)abort_gzip);
- }
-#endif
-#ifdef SIGHUP
- if (signal(SIGHUP, SIG_IGN) != SIG_IGN) {
- (void) signal(SIGHUP, (sig_type)abort_gzip);
- }
-#endif
-
- if (do_decompress_arg)
- decompress = 1;
-
- z_suffix = Z_SUFFIX;
- z_len = strlen(z_suffix);
-
-#ifdef SIGPIPE
- /* Ignore "Broken Pipe" message with --quiet */
- if (quiet && signal (SIGPIPE, SIG_IGN) != SIG_IGN)
- signal (SIGPIPE, (sig_type) abort_gzip);
-#endif
-
- /* By default, save name and timestamp on compression but do not
- * restore them on decompression.
- */
- if (no_time < 0) no_time = decompress;
- if (no_name < 0) no_name = decompress;
-
- file_count = argc - optind;
-
- /* Allocate all global buffers (for DYN_ALLOC option) */
- ALLOC(uch, inbuf, INBUFSIZ +INBUF_EXTRA);
- ALLOC(uch, outbuf, OUTBUFSIZ+OUTBUF_EXTRA);
- ALLOC(ush, d_buf, DIST_BUFSIZE);
- ALLOC(uch, window, 2L*WSIZE);
-#ifndef MAXSEG_64K
- ALLOC(ush, tab_prefix, 1L<<BITS);
-#else
- ALLOC(ush, tab_prefix0, 1L<<(BITS-1));
- ALLOC(ush, tab_prefix1, 1L<<(BITS-1));
-#endif
-
- treat_stdin();
-
- do_exit(exit_code);
- return exit_code; /* just to avoid lint warning */
-}
-
-/* Return nonzero when at end of file on input. */
-local int
-input_eof ()
-{
- if (!decompress || last_member)
- return 1;
-
- if (inptr == insize)
- {
- if (insize != INBUFSIZ || fill_inbuf (1) == EOF)
- return 1;
-
- /* Unget the char that fill_inbuf got. */
- inptr = 0;
- }
-
- return 0;
-}
-
-/* ========================================================================
- * Compress or decompress stdin
- */
-local void treat_stdin()
-{
- strcpy(ifname, "stdin");
- strcpy(ofname, "stdout");
-
- /* Get the time stamp on the input file. */
- time_stamp = 0; /* time unknown by default */
-
- ifile_size = -1L; /* convention for unknown size */
-
- clear_bufs(); /* clear input and output buffers */
- to_stdout = 1;
- part_nb = 0;
-
- if (decompress) {
- method = get_method(ifd);
- if (method < 0) {
- do_exit(exit_code); /* error message already emitted */
- }
- }
-
- /* Actually do the compression/decompression. Loop over zipped members.
- */
- for (;;) {
- if ((*work)(fileno(stdin), fileno(stdout)) != OK) return;
-
- if (input_eof ())
- break;
-
- method = get_method(ifd);
- if (method < 0) return; /* error message already emitted */
- bytes_out = 0; /* required for length check */
- }
-
-}
-
-
-/* ========================================================================
- * Check the magic number of the input file and update ofname if an
- * original name was given and to_stdout is not set.
- * Return the compression method, -1 for error, -2 for warning.
- * Set inptr to the offset of the next byte to be processed.
- * Updates time_stamp if there is one and --no-time is not used.
- * This function may be called repeatedly for an input file consisting
- * of several contiguous gzip'ed members.
- * IN assertions: there is at least one remaining compressed member.
- * If the member is a zip file, it must be the only one.
- */
-local int get_method(in)
- int in; /* input file descriptor */
-{
- uch flags; /* compression flags */
- char magic[2]; /* magic header */
- int imagic1; /* like magic[1], but can represent EOF */
- ulg stamp; /* time stamp */
-
- /* If --force and --stdout, zcat == cat, so do not complain about
- * premature end of file: use try_byte instead of get_byte.
- */
- if (force && to_stdout) {
- magic[0] = (char)try_byte();
- imagic1 = try_byte ();
- magic[1] = (char) imagic1;
- /* If try_byte returned EOF, magic[1] == (char) EOF. */
- } else {
- magic[0] = (char)get_byte();
- magic[1] = (char)get_byte();
- imagic1 = 0; /* avoid lint warning */
- }
- method = -1; /* unknown yet */
- part_nb++; /* number of parts in gzip file */
- header_bytes = 0;
- last_member = RECORD_IO;
- /* assume multiple members in gzip file except for record oriented I/O */
-
- if (memcmp(magic, GZIP_MAGIC, 2) == 0
- || memcmp(magic, OLD_GZIP_MAGIC, 2) == 0) {
-
- method = (int)get_byte();
- if (method != DEFLATED) {
- fprintf(stderr,
- "%s: %s: unknown method %d -- get newer version of gzip\n",
- progname, ifname, method);
- exit_code = ERROR;
- return -1;
- }
- work = unzip;
- flags = (uch)get_byte();
-
- stamp = (ulg)get_byte();
- stamp |= ((ulg)get_byte()) << 8;
- stamp |= ((ulg)get_byte()) << 16;
- stamp |= ((ulg)get_byte()) << 24;
- if (stamp != 0 && !no_time) time_stamp = stamp;
-
- (void)get_byte(); /* Ignore extra flags for the moment */
- (void)get_byte(); /* Ignore OS type for the moment */
-
- if ((flags & CONTINUATION) != 0) {
- unsigned part = (unsigned)get_byte();
- part |= ((unsigned)get_byte())<<8;
- }
- if ((flags & EXTRA_FIELD) != 0) {
- unsigned len = (unsigned)get_byte();
- len |= ((unsigned)get_byte())<<8;
- while (len--) (void)get_byte();
- }
-
- /* Get original file name if it was truncated */
- if ((flags & ORIG_NAME) != 0) {
- char c; /* dummy used for NeXTstep 3.0 cc optimizer bug */
- do {c=get_byte();} while (c != 0);
- } /* ORIG_NAME */
-
- /* Discard file comment if any */
- if ((flags & COMMENT) != 0) {
- while (get_char() != 0) /* null */ ;
- }
- if (part_nb == 1) {
- header_bytes = inptr + 2*sizeof(long); /* include crc and size */
- }
-
- } else if (force && to_stdout && !list) { /* pass input unchanged */
- method = STORED;
- work = copy;
- inptr = 0;
- last_member = 1;
- }
-
- if (method >= 0) return method;
-
- if (part_nb == 1) {
- fprintf(stderr, "\n%s: %s: not in gzip format\n", progname, ifname);
- exit_code = ERROR;
- return -1;
- } else {
- if (magic[0] == 0)
- {
- int inbyte;
- for (inbyte = imagic1; inbyte == 0; inbyte = try_byte ())
- continue;
- if (inbyte == EOF)
- {
- return -3;
- }
- }
-
- WARN((stderr, "\n%s: %s: decompression OK, trailing garbage ignored\n",
- progname, ifname));
- return -2;
- }
-}
-
-/* ========================================================================
- * Free all dynamically allocated variables and exit with the given code.
- */
-local void do_exit(exitcode)
- int exitcode;
-{
- static int in_exit = 0;
-
- if (in_exit) exit(exitcode);
- in_exit = 1;
- if (env != NULL) free(env), env = NULL;
- if (args != NULL) free((char*)args), args = NULL;
- FREE(inbuf);
- FREE(outbuf);
- FREE(d_buf);
- FREE(window);
-#ifndef MAXSEG_64K
- FREE(tab_prefix);
-#else
- FREE(tab_prefix0);
- FREE(tab_prefix1);
-#endif
- exit(exitcode);
-}
-
-/* ========================================================================
- * Signal and error handler.
- */
-RETSIGTYPE abort_gzip()
-{
- if (remove_ofname) {
- close(ofd);
- unlink (ofname);
- }
- do_exit(ERROR);
-}
diff --git a/isys/gzlib/gzip.h b/isys/gzlib/gzip.h
deleted file mode 100644
index 7f8613866..000000000
--- a/isys/gzlib/gzip.h
+++ /dev/null
@@ -1,315 +0,0 @@
-/* gzip.h -- common declarations for all gzip modules
- * Copyright (C) 1992-1993 Jean-loup Gailly.
- * This is free software; you can redistribute it and/or modify it under the
- * terms of the GNU General Public License, see the file COPYING.
- */
-
-#if defined(__STDC__) || defined(PROTO)
-# define OF(args) args
-#else
-# define OF(args) ()
-#endif
-
-#ifdef __STDC__
- typedef void *voidp;
-#else
- typedef char *voidp;
-#endif
-
-/* I don't like nested includes, but the following headers are used
- * too often
- */
-#include <stdio.h>
-#include <sys/types.h> /* for off_t, time_t */
-#if defined HAVE_STRING_H || defined STDC_HEADERS
-# include <string.h>
-# if !defined STDC_HEADERS && defined HAVE_MEMORY_H && !defined __GNUC__
-# include <memory.h>
-# endif
-# define memzero(s, n) memset ((voidp)(s), 0, (n))
-#else
-# include <strings.h>
-# define strchr index
-# define strrchr rindex
-# define memcpy(d, s, n) bcopy((s), (d), (n))
-# define memcmp(s1, s2, n) bcmp((s1), (s2), (n))
-# define memzero(s, n) bzero((s), (n))
-#endif
-
-#ifndef RETSIGTYPE
-# define RETSIGTYPE void
-#endif
-
-#define local static
-
-typedef unsigned char uch;
-typedef unsigned short ush;
-typedef unsigned long ulg;
-
-/* Return codes from gzip */
-#define OK 0
-#define ERROR 1
-#define WARNING 2
-
-/* Compression methods (see algorithm.doc) */
-#define STORED 0
-#define COMPRESSED 1
-#define PACKED 2
-#define LZHED 3
-/* methods 4 to 7 reserved */
-#define DEFLATED 8
-#define MAX_METHODS 9
-extern int method; /* compression method */
-
-/* To save memory for 16 bit systems, some arrays are overlaid between
- * the various modules:
- * deflate: prev+head window d_buf l_buf outbuf
- * unlzw: tab_prefix tab_suffix stack inbuf outbuf
- * inflate: window inbuf
- * unpack: window inbuf prefix_len
- * unlzh: left+right window c_table inbuf c_len
- * For compression, input is done in window[]. For decompression, output
- * is done in window except for unlzw.
- */
-
-#ifndef INBUFSIZ
-# ifdef SMALL_MEM
-# define INBUFSIZ 0x2000 /* input buffer size */
-# else
-# define INBUFSIZ 0x8000 /* input buffer size */
-# endif
-#endif
-#define INBUF_EXTRA 64 /* required by unlzw() */
-
-#ifndef OUTBUFSIZ
-# ifdef SMALL_MEM
-# define OUTBUFSIZ 8192 /* output buffer size */
-# else
-# define OUTBUFSIZ 16384 /* output buffer size */
-# endif
-#endif
-#define OUTBUF_EXTRA 2048 /* required by unlzw() */
-
-#ifndef DIST_BUFSIZE
-# ifdef SMALL_MEM
-# define DIST_BUFSIZE 0x2000 /* buffer for distances, see trees.c */
-# else
-# define DIST_BUFSIZE 0x8000 /* buffer for distances, see trees.c */
-# endif
-#endif
-
-#ifdef DYN_ALLOC
-# define EXTERN(type, array) extern type * near array
-# define DECLARE(type, array, size) type * near array
-# define ALLOC(type, array, size) { \
- array = (type*)fcalloc((size_t)(((size)+1L)/2), 2*sizeof(type)); \
- if (array == NULL) gzerror("insufficient memory"); \
- }
-# define FREE(array) {if (array != NULL) fcfree(array), array=NULL;}
-#else
-# define EXTERN(type, array) extern type array[]
-# define DECLARE(type, array, size) type array[size]
-# define ALLOC(type, array, size)
-# define FREE(array)
-#endif
-
-EXTERN(uch, inbuf); /* input buffer */
-EXTERN(uch, outbuf); /* output buffer */
-EXTERN(ush, d_buf); /* buffer for distances, see trees.c */
-EXTERN(uch, window); /* Sliding window and suffix table (unlzw) */
-#define tab_suffix window
-#ifndef MAXSEG_64K
-# define tab_prefix prev /* hash link (see deflate.c) */
-# define head (prev+WSIZE) /* hash head (see deflate.c) */
- EXTERN(ush, tab_prefix); /* prefix code (see unlzw.c) */
-#else
-# define tab_prefix0 prev
-# define head tab_prefix1
- EXTERN(ush, tab_prefix0); /* prefix for even codes */
- EXTERN(ush, tab_prefix1); /* prefix for odd codes */
-#endif
-
-extern unsigned insize; /* valid bytes in inbuf */
-extern unsigned inptr; /* index of next byte to be processed in inbuf */
-extern unsigned outcnt; /* bytes in output buffer */
-
-extern off_t bytes_in; /* number of input bytes */
-extern off_t bytes_out; /* number of output bytes */
-extern off_t header_bytes;/* number of bytes in gzip header */
-
-extern int ifd; /* input file descriptor */
-extern int ofd; /* output file descriptor */
-extern char ifname[]; /* input file name or "stdin" */
-extern char ofname[]; /* output file name or "stdout" */
-extern char *progname; /* program name */
-
-extern time_t time_stamp; /* original time stamp (modification time) */
-extern off_t ifile_size; /* input file size, -1 for devices (debug only) */
-
-typedef int file_t; /* Do not use stdio */
-#define NO_FILE (-1) /* in memory compression */
-
-
-#define PACK_MAGIC "\037\036" /* Magic header for packed files */
-#define GZIP_MAGIC "\037\213" /* Magic header for gzip files, 1F 8B */
-#define OLD_GZIP_MAGIC "\037\236" /* Magic header for gzip 0.5 = freeze 1.x */
-#define LZH_MAGIC "\037\240" /* Magic header for SCO LZH Compress files*/
-#define PKZIP_MAGIC "\120\113\003\004" /* Magic header for pkzip files */
-
-/* gzip flag byte */
-#define ASCII_FLAG 0x01 /* bit 0 set: file probably ascii text */
-#define CONTINUATION 0x02 /* bit 1 set: continuation of multi-part gzip file */
-#define EXTRA_FIELD 0x04 /* bit 2 set: extra field present */
-#define ORIG_NAME 0x08 /* bit 3 set: original file name present */
-#define COMMENT 0x10 /* bit 4 set: file comment present */
-#define ENCRYPTED 0x20 /* bit 5 set: file is encrypted */
-#define RESERVED 0xC0 /* bit 6,7: reserved */
-
-/* internal file attribute */
-#define UNKNOWN 0xffff
-#define BINARY 0
-#define ASCII 1
-
-#ifndef WSIZE
-# define WSIZE 0x8000 /* window size--must be a power of two, and */
-#endif /* at least 32K for zip's deflate method */
-
-#define MIN_MATCH 3
-#define MAX_MATCH 258
-/* The minimum and maximum match lengths */
-
-#define MIN_LOOKAHEAD (MAX_MATCH+MIN_MATCH+1)
-/* Minimum amount of lookahead, except at the end of the input file.
- * See deflate.c for comments about the MIN_MATCH+1.
- */
-
-#define MAX_DIST (WSIZE-MIN_LOOKAHEAD)
-/* In order to simplify the code, particularly on 16 bit machines, match
- * distances are limited to MAX_DIST instead of WSIZE.
- */
-
-extern int decrypt; /* flag to turn on decryption */
-extern int exit_code; /* program exit code */
-extern int verbose; /* be verbose (-v) */
-extern int quiet; /* be quiet (-q) */
-extern int level; /* compression level */
-extern int test; /* check .z file integrity */
-extern int to_stdout; /* output to stdout (-c) */
-extern int save_orig_name; /* set if original name must be saved */
-
-#define get_byte() (inptr < insize ? inbuf[inptr++] : fill_inbuf(0))
-#define try_byte() (inptr < insize ? inbuf[inptr++] : fill_inbuf(1))
-
-/* put_byte is used for the compressed output, put_ubyte for the
- * uncompressed output. However unlzw() uses window for its
- * suffix table instead of its output buffer, so it does not use put_ubyte
- * (to be cleaned up).
- */
-#define put_byte(c) {outbuf[outcnt++]=(uch)(c); if (outcnt==OUTBUFSIZ)\
- flush_outbuf();}
-#define put_ubyte(c) {window[outcnt++]=(uch)(c); if (outcnt==WSIZE)\
- flush_window();}
-
-/* Output a 16 bit value, lsb first */
-#define put_short(w) \
-{ if (outcnt < OUTBUFSIZ-2) { \
- outbuf[outcnt++] = (uch) ((w) & 0xff); \
- outbuf[outcnt++] = (uch) ((ush)(w) >> 8); \
- } else { \
- put_byte((uch)((w) & 0xff)); \
- put_byte((uch)((ush)(w) >> 8)); \
- } \
-}
-
-/* Output a 32 bit value to the bit stream, lsb first */
-#define put_long(n) { \
- put_short((n) & 0xffff); \
- put_short(((ulg)(n)) >> 16); \
-}
-
-#define seekable() 0 /* force sequential output */
-#define translate_eol 0 /* no option -a yet */
-
-#define tolow(c) (isupper (c) ? tolower (c) : (c)) /* force to lower case */
-
-/* Macros for getting two-byte and four-byte header values */
-#define SH(p) ((ush)(uch)((p)[0]) | ((ush)(uch)((p)[1]) << 8))
-#define LG(p) ((ulg)(SH(p)) | ((ulg)(SH((p)+2)) << 16))
-
-/* Diagnostic functions */
-#ifdef DEBUG
-# define Assert(cond,msg) {if(!(cond)) gzerror(msg);}
-# define Trace(x) fprintf x
-# define Tracev(x) {if (verbose) fprintf x ;}
-# define Tracevv(x) {if (verbose>1) fprintf x ;}
-# define Tracec(c,x) {if (verbose && (c)) fprintf x ;}
-# define Tracecv(c,x) {if (verbose>1 && (c)) fprintf x ;}
-#else
-# define Assert(cond,msg)
-# define Trace(x)
-# define Tracev(x)
-# define Tracevv(x)
-# define Tracec(c,x)
-# define Tracecv(c,x)
-#endif
-
-#define WARN(msg) {if (!quiet) fprintf msg ; \
- if (exit_code == OK) exit_code = WARNING;}
-
- /* in zip.c: */
-extern int zip OF((int in, int out));
-extern int file_read OF((char *buf, unsigned size));
-
- /* in unzip.c */
-extern int unzip OF((int in, int out));
-extern int check_zipfile OF((int in));
-
- /* in unpack.c */
-extern int unpack OF((int in, int out));
-
- /* in unlzh.c */
-extern int unlzh OF((int in, int out));
-
- /* in gzip.c */
-RETSIGTYPE abort_gzip OF((void));
-
- /* in deflate.c */
-void lm_init OF((int pack_level, ush *flags));
-off_t deflate OF((void));
-
- /* in trees.c */
-void ct_init OF((ush *attr, int *method));
-int ct_tally OF((int dist, int lc));
-off_t flush_block OF((char *buf, ulg stored_len, int eof));
-
- /* in bits.c */
-void bi_init OF((file_t zipfile));
-void send_bits OF((int value, int length));
-unsigned bi_reverse OF((unsigned value, int length));
-void bi_windup OF((void));
-void copy_block OF((char *buf, unsigned len, int header));
-extern int (*read_buf) OF((char *buf, unsigned size));
-
- /* in util.c: */
-extern int copy OF((int in, int out));
-extern ulg updcrc OF((uch *s, unsigned n));
-extern void clear_bufs OF((void));
-extern int fill_inbuf OF((int eof_ok));
-extern void flush_outbuf OF((void));
-extern void flush_window OF((void));
-extern void write_buf OF((int fd, voidp buf, unsigned cnt));
-extern char *strlwr OF((char *s));
-extern char *base_name OF((char *fname));
-extern int xunlink OF((char *fname));
-extern void make_simple_name OF((char *name));
-extern char *add_envopt OF((int *argcp, char ***argvp, char *env));
-extern void gzerror OF((char *m));
-extern void warning OF((char *m));
-extern void read_error OF((void));
-extern void write_error OF((void));
-extern void display_ratio OF((off_t num, off_t den, FILE *file));
-extern void fprint_off OF((FILE *, off_t, int));
-extern voidp gzxmalloc OF((unsigned int size));
-
- /* in inflate.c */
-extern int inflate OF((void));
diff --git a/isys/gzlib/gzlib.h b/isys/gzlib/gzlib.h
deleted file mode 100644
index 8677737f8..000000000
--- a/isys/gzlib/gzlib.h
+++ /dev/null
@@ -1,15 +0,0 @@
-#ifndef H_GZFILE
-#define H_GZFILE
-
-typedef struct gzFile_s * gzFile;
-
-gzFile gunzip_open(const char * file);
-gzFile gunzip_dopen(int fd);
-gzFile gzip_open(const char * file, int mode, int perms);
-gzFile gzip_dopen(int fd);
-int gunzip_read(gzFile str, void * buf, int bytes);
-int gzip_write(gzFile str, void * buf, int bytes);
-int gunzip_close(gzFile str);
-int gzip_close(gzFile str);
-
-#endif
diff --git a/isys/gzlib/inflate.c b/isys/gzlib/inflate.c
deleted file mode 100644
index ba58617bd..000000000
--- a/isys/gzlib/inflate.c
+++ /dev/null
@@ -1,957 +0,0 @@
-/* inflate.c -- Not copyrighted 1992 by Mark Adler
- version c10p1, 10 January 1993 */
-
-/* You can do whatever you like with this source file, though I would
- prefer that if you modify it and redistribute it that you include
- comments to that effect with your name and the date. Thank you.
- [The history has been moved to the file ChangeLog.]
- */
-
-/*
- Inflate deflated (PKZIP's method 8 compressed) data. The compression
- method searches for as much of the current string of bytes (up to a
- length of 258) in the previous 32K bytes. If it doesn't find any
- matches (of at least length 3), it codes the next byte. Otherwise, it
- codes the length of the matched string and its distance backwards from
- the current position. There is a single Huffman code that codes both
- single bytes (called "literals") and match lengths. A second Huffman
- code codes the distance information, which follows a length code. Each
- length or distance code actually represents a base value and a number
- of "extra" (sometimes zero) bits to get to add to the base value. At
- the end of each deflated block is a special end-of-block (EOB) literal/
- length code. The decoding process is basically: get a literal/length
- code; if EOB then done; if a literal, emit the decoded byte; if a
- length then get the distance and emit the referred-to bytes from the
- sliding window of previously emitted data.
-
- There are (currently) three kinds of inflate blocks: stored, fixed, and
- dynamic. The compressor deals with some chunk of data at a time, and
- decides which method to use on a chunk-by-chunk basis. A chunk might
- typically be 32K or 64K. If the chunk is uncompressible, then the
- "stored" method is used. In this case, the bytes are simply stored as
- is, eight bits per byte, with none of the above coding. The bytes are
- preceded by a count, since there is no longer an EOB code.
-
- If the data is compressible, then either the fixed or dynamic methods
- are used. In the dynamic method, the compressed data is preceded by
- an encoding of the literal/length and distance Huffman codes that are
- to be used to decode this block. The representation is itself Huffman
- coded, and so is preceded by a description of that code. These code
- descriptions take up a little space, and so for small blocks, there is
- a predefined set of codes, called the fixed codes. The fixed method is
- used if the block codes up smaller that way (usually for quite small
- chunks), otherwise the dynamic method is used. In the latter case, the
- codes are customized to the probabilities in the current block, and so
- can code it much better than the pre-determined fixed codes.
-
- The Huffman codes themselves are decoded using a mutli-level table
- lookup, in order to maximize the speed of decoding plus the speed of
- building the decoding tables. See the comments below that precede the
- lbits and dbits tuning parameters.
- */
-
-
-/*
- Notes beyond the 1.93a appnote.txt:
-
- 1. Distance pointers never point before the beginning of the output
- stream.
- 2. Distance pointers can point back across blocks, up to 32k away.
- 3. There is an implied maximum of 7 bits for the bit length table and
- 15 bits for the actual data.
- 4. If only one code exists, then it is encoded using one bit. (Zero
- would be more efficient, but perhaps a little confusing.) If two
- codes exist, they are coded using one bit each (0 and 1).
- 5. There is no way of sending zero distance codes--a dummy must be
- sent if there are none. (History: a pre 2.0 version of PKZIP would
- store blocks with no distance codes, but this was discovered to be
- too harsh a criterion.) Valid only for 1.93a. 2.04c does allow
- zero distance codes, which is sent as one code of zero bits in
- length.
- 6. There are up to 286 literal/length codes. Code 256 represents the
- end-of-block. Note however that the static length tree defines
- 288 codes just to fill out the Huffman codes. Codes 286 and 287
- cannot be used though, since there is no length base or extra bits
- defined for them. Similarly, there are up to 30 distance codes.
- However, static trees define 32 codes (all 5 bits) to fill out the
- Huffman codes, but the last two had better not show up in the data.
- 7. Unzip can check dynamic Huffman blocks for complete code sets.
- The exception is that a single code would not be complete (see #4).
- 8. The five bits following the block type is really the number of
- literal codes sent minus 257.
- 9. Length codes 8,16,16 are interpreted as 13 length codes of 8 bits
- (1+6+6). Therefore, to output three times the length, you output
- three codes (1+1+1), whereas to output four times the same length,
- you only need two codes (1+3). Hmm.
- 10. In the tree reconstruction algorithm, Code = Code + Increment
- only if BitLength(i) is not zero. (Pretty obvious.)
- 11. Correction: 4 Bits: # of Bit Length codes - 4 (4 - 19)
- 12. Note: length code 284 can represent 227-258, but length code 285
- really is 258. The last length deserves its own, short code
- since it gets used a lot in very redundant files. The length
- 258 is special since 258 - 3 (the min match length) is 255.
- 13. The literal/length and distance code bit lengths are read as a
- single stream of lengths. It is possible (and advantageous) for
- a repeat code (16, 17, or 18) to go across the boundary between
- the two sets of lengths.
- */
-
-#ifdef RCSID
-static char rcsid[] = "$Id$";
-#endif
-
-#include <config.h>
-#include "tailor.h"
-
-#if defined STDC_HEADERS || defined HAVE_STDLIB_H
-# include <stdlib.h>
-#endif
-
-#include "gzip.h"
-#define slide window
-
-/* Huffman code lookup table entry--this entry is four bytes for machines
- that have 16-bit pointers (e.g. PC's in the small or medium model).
- Valid extra bits are 0..13. e == 15 is EOB (end of block), e == 16
- means that v is a literal, 16 < e < 32 means that v is a pointer to
- the next table, which codes e - 16 bits, and lastly e == 99 indicates
- an unused code. If a code with e == 99 is looked up, this implies an
- error in the data. */
-struct huft {
- uch e; /* number of extra bits or operation */
- uch b; /* number of bits in this code or subcode */
- union {
- ush n; /* literal, length base, or distance base */
- struct huft *t; /* pointer to next level of table */
- } v;
-};
-
-
-/* Function prototypes */
-int huft_build OF((unsigned *, unsigned, unsigned, ush *, ush *,
- struct huft **, int *));
-int huft_free OF((struct huft *));
-int inflate_codes OF((struct huft *, struct huft *, int, int));
-int inflate_stored OF((void));
-int inflate_fixed OF((void));
-int inflate_dynamic OF((void));
-int inflate_block OF((int *));
-int inflate OF((void));
-
-
-/* The inflate algorithm uses a sliding 32K byte window on the uncompressed
- stream to find repeated byte strings. This is implemented here as a
- circular buffer. The index is updated simply by incrementing and then
- and'ing with 0x7fff (32K-1). */
-/* It is left to other modules to supply the 32K area. It is assumed
- to be usable as if it were declared "uch slide[32768];" or as just
- "uch *slide;" and then malloc'ed in the latter case. The definition
- must be in unzip.h, included above. */
-/* unsigned wp; current position in slide */
-#define wp outcnt
-#define flush_output(w) (wp=(w),flush_window())
-
-/* Tables for deflate from PKZIP's appnote.txt. */
-static unsigned border[] = { /* Order of the bit length code lengths */
- 16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15};
-static ush cplens[] = { /* Copy lengths for literal codes 257..285 */
- 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 15, 17, 19, 23, 27, 31,
- 35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 258, 0, 0};
- /* note: see note #13 above about the 258 in this list. */
-static ush cplext[] = { /* Extra bits for literal codes 257..285 */
- 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2,
- 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 0, 99, 99}; /* 99==invalid */
-static ush cpdist[] = { /* Copy offsets for distance codes 0..29 */
- 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,
- 8193, 12289, 16385, 24577};
-static ush cpdext[] = { /* Extra bits for distance codes */
- 0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6,
- 7, 7, 8, 8, 9, 9, 10, 10, 11, 11,
- 12, 12, 13, 13};
-
-
-
-/* Macros for inflate() bit peeking and grabbing.
- The usage is:
-
- NEEDBITS(j)
- x = b & mask_bits[j];
- DUMPBITS(j)
-
- where NEEDBITS makes sure that b has at least j bits in it, and
- DUMPBITS removes the bits from b. The macros use the variable k
- for the number of bits in b. Normally, b and k are register
- variables for speed, and are initialized at the beginning of a
- routine that uses these macros from a global bit buffer and count.
-
- If we assume that EOB will be the longest code, then we will never
- ask for bits with NEEDBITS that are beyond the end of the stream.
- So, NEEDBITS should not read any more bytes than are needed to
- meet the request. Then no bytes need to be "returned" to the buffer
- at the end of the last block.
-
- However, this assumption is not true for fixed blocks--the EOB code
- is 7 bits, but the other literal/length codes can be 8 or 9 bits.
- (The EOB code is shorter than other codes because fixed blocks are
- generally short. So, while a block always has an EOB, many other
- literal/length codes have a significantly lower probability of
- showing up at all.) However, by making the first table have a
- lookup of seven bits, the EOB code will be found in that first
- lookup, and so will not require that too many bits be pulled from
- the stream.
- */
-
-ulg bb; /* bit buffer */
-unsigned bk; /* bits in bit buffer */
-
-ush mask_bits[] = {
- 0x0000,
- 0x0001, 0x0003, 0x0007, 0x000f, 0x001f, 0x003f, 0x007f, 0x00ff,
- 0x01ff, 0x03ff, 0x07ff, 0x0fff, 0x1fff, 0x3fff, 0x7fff, 0xffff
-};
-
-#ifdef CRYPT
- uch cc;
-# define NEXTBYTE() \
- (decrypt ? (cc = get_byte(), zdecode(cc), cc) : get_byte())
-#else
-# define NEXTBYTE() (uch)get_byte()
-#endif
-#define NEEDBITS(n) {while(k<(n)){b|=((ulg)NEXTBYTE())<<k;k+=8;}}
-#define DUMPBITS(n) {b>>=(n);k-=(n);}
-
-
-/*
- Huffman code decoding is performed using a multi-level table lookup.
- The fastest way to decode is to simply build a lookup table whose
- size is determined by the longest code. However, the time it takes
- to build this table can also be a factor if the data being decoded
- is not very long. The most common codes are necessarily the
- shortest codes, so those codes dominate the decoding time, and hence
- the speed. The idea is you can have a shorter table that decodes the
- shorter, more probable codes, and then point to subsidiary tables for
- the longer codes. The time it costs to decode the longer codes is
- then traded against the time it takes to make longer tables.
-
- This results of this trade are in the variables lbits and dbits
- below. lbits is the number of bits the first level table for literal/
- length codes can decode in one step, and dbits is the same thing for
- the distance codes. Subsequent tables are also less than or equal to
- those sizes. These values may be adjusted either when all of the
- codes are shorter than that, in which case the longest code length in
- bits is used, or when the shortest code is *longer* than the requested
- table size, in which case the length of the shortest code in bits is
- used.
-
- There are two different values for the two tables, since they code a
- different number of possibilities each. The literal/length table
- codes 286 possible values, or in a flat code, a little over eight
- bits. The distance table codes 30 possible values, or a little less
- than five bits, flat. The optimum values for speed end up being
- about one bit more than those, so lbits is 8+1 and dbits is 5+1.
- The optimum values may differ though from machine to machine, and
- possibly even between compilers. Your mileage may vary.
- */
-
-
-int lbits = 9; /* bits in base literal/length lookup table */
-int dbits = 6; /* bits in base distance lookup table */
-
-
-/* If BMAX needs to be larger than 16, then h and x[] should be ulg. */
-#define BMAX 16 /* maximum bit length of any code (16 for explode) */
-#define N_MAX 288 /* maximum number of codes in any set */
-
-
-unsigned hufts; /* track memory usage */
-
-
-int huft_build(b, n, s, d, e, t, m)
-unsigned *b; /* code lengths in bits (all assumed <= BMAX) */
-unsigned n; /* number of codes (assumed <= N_MAX) */
-unsigned s; /* number of simple-valued codes (0..s-1) */
-ush *d; /* list of base values for non-simple codes */
-ush *e; /* list of extra bits for non-simple codes */
-struct huft **t; /* result: starting table */
-int *m; /* maximum lookup bits, returns actual */
-/* Given a list of code lengths and a maximum table size, make a set of
- tables to decode that set of codes. Return zero on success, one if
- the given code set is incomplete (the tables are still built in this
- case), two if the input is invalid (all zero length codes or an
- oversubscribed set of lengths), and three if not enough memory. */
-{
- unsigned a; /* counter for codes of length k */
- unsigned c[BMAX+1]; /* bit length count table */
- unsigned f; /* i repeats in table every f entries */
- int g; /* maximum code length */
- int h; /* table level */
- register unsigned i; /* counter, current code */
- register unsigned j; /* counter */
- register int k; /* number of bits in current code */
- int l; /* bits per table (returned in m) */
- register unsigned *p; /* pointer into c[], b[], or v[] */
- register struct huft *q; /* points to current table */
- struct huft r; /* table entry for structure assignment */
- struct huft *u[BMAX]; /* table stack */
- unsigned v[N_MAX]; /* values in order of bit length */
- register int w; /* bits before this table == (l * h) */
- unsigned x[BMAX+1]; /* bit offsets, then code stack */
- unsigned *xp; /* pointer into x */
- int y; /* number of dummy codes added */
- unsigned z; /* number of entries in current table */
-
-
- /* Generate counts for each bit length */
- memzero(c, sizeof(c));
- p = b; i = n;
- do {
- Tracecv(*p, (stderr, (n-i >= ' ' && n-i <= '~' ? "%c %d\n" : "0x%x %d\n"),
- n-i, *p));
- c[*p]++; /* assume all entries <= BMAX */
- p++; /* Can't combine with above line (Solaris bug) */
- } while (--i);
- if (c[0] == n) /* null input--all zero length codes */
- {
- *t = (struct huft *)NULL;
- *m = 0;
- return 0;
- }
-
-
- /* Find minimum and maximum length, bound *m by those */
- l = *m;
- for (j = 1; j <= BMAX; j++)
- if (c[j])
- break;
- k = j; /* minimum code length */
- if ((unsigned)l < j)
- l = j;
- for (i = BMAX; i; i--)
- if (c[i])
- break;
- g = i; /* maximum code length */
- if ((unsigned)l > i)
- l = i;
- *m = l;
-
-
- /* Adjust last length count to fill out codes, if needed */
- for (y = 1 << j; j < i; j++, y <<= 1)
- if ((y -= c[j]) < 0)
- return 2; /* bad input: more codes than bits */
- if ((y -= c[i]) < 0)
- return 2;
- c[i] += y;
-
-
- /* Generate starting offsets into the value table for each length */
- x[1] = j = 0;
- p = c + 1; xp = x + 2;
- while (--i) { /* note that i == g from above */
- *xp++ = (j += *p++);
- }
-
-
- /* Make a table of values in order of bit lengths */
- p = b; i = 0;
- do {
- if ((j = *p++) != 0)
- v[x[j]++] = i;
- } while (++i < n);
- n = x[g]; /* set n to length of v */
-
-
- /* Generate the Huffman codes and for each, make the table entries */
- x[0] = i = 0; /* first Huffman code is zero */
- p = v; /* grab values in bit order */
- h = -1; /* no tables yet--level -1 */
- w = -l; /* bits decoded == (l * h) */
- u[0] = (struct huft *)NULL; /* just to keep compilers happy */
- q = (struct huft *)NULL; /* ditto */
- z = 0; /* ditto */
-
- /* go through the bit lengths (k already is bits in shortest code) */
- for (; k <= g; k++)
- {
- a = c[k];
- while (a--)
- {
- /* here i is the Huffman code of length k bits for value *p */
- /* make tables up to required level */
- while (k > w + l)
- {
- h++;
- w += l; /* previous table always l bits */
-
- /* compute minimum size table less than or equal to l bits */
- z = (z = g - w) > (unsigned)l ? (unsigned)l : z; /* upper limit on table size */
- if ((f = 1 << (j = k - w)) > a + 1) /* try a k-w bit table */
- { /* too few codes for k-w bit table */
- f -= a + 1; /* deduct codes from patterns left */
- xp = c + k;
- if (j < z)
- while (++j < z) /* try smaller tables up to z bits */
- {
- if ((f <<= 1) <= *++xp)
- break; /* enough codes to use up j bits */
- f -= *xp; /* else deduct codes from patterns */
- }
- }
- z = 1 << j; /* table entries for j-bit table */
-
- /* allocate and link in new table */
- if ((q = (struct huft *)malloc((z + 1)*sizeof(struct huft))) ==
- (struct huft *)NULL)
- {
- if (h)
- huft_free(u[0]);
- return 3; /* not enough memory */
- }
- hufts += z + 1; /* track memory usage */
- *t = q + 1; /* link to list for huft_free() */
- *(t = &(q->v.t)) = (struct huft *)NULL;
- u[h] = ++q; /* table starts after link */
-
- /* connect to last table, if there is one */
- if (h)
- {
- x[h] = i; /* save pattern for backing up */
- r.b = (uch)l; /* bits to dump before this table */
- r.e = (uch)(16 + j); /* bits in this table */
- r.v.t = q; /* pointer to this table */
- j = i >> (w - l); /* (get around Turbo C bug) */
- u[h-1][j] = r; /* connect to last table */
- }
- }
-
- /* set up table entry in r */
- r.b = (uch)(k - w);
- if (p >= v + n)
- r.e = 99; /* out of values--invalid code */
- else if (*p < s)
- {
- r.e = (uch)(*p < 256 ? 16 : 15); /* 256 is end-of-block code */
- r.v.n = (ush)(*p); /* simple code is just the value */
- p++; /* one compiler does not like *p++ */
- }
- else
- {
- r.e = (uch)e[*p - s]; /* non-simple--look up in lists */
- r.v.n = d[*p++ - s];
- }
-
- /* fill code-like entries with r */
- f = 1 << (k - w);
- for (j = i >> w; j < z; j += f)
- q[j] = r;
-
- /* backwards increment the k-bit code i */
- for (j = 1 << (k - 1); i & j; j >>= 1)
- i ^= j;
- i ^= j;
-
- /* backup over finished tables */
- while ((i & ((1 << w) - 1)) != x[h])
- {
- h--; /* don't need to update q */
- w -= l;
- }
- }
- }
-
-
- /* Return true (1) if we were given an incomplete table */
- return y != 0 && g != 1;
-}
-
-
-
-int huft_free(t)
-struct huft *t; /* table to free */
-/* Free the malloc'ed tables built by huft_build(), which makes a linked
- list of the tables it made, with the links in a dummy first entry of
- each table. */
-{
- register struct huft *p, *q;
-
-
- /* Go through linked list, freeing from the malloced (t[-1]) address. */
- p = t;
- while (p != (struct huft *)NULL)
- {
- q = (--p)->v.t;
- free((char*)p);
- p = q;
- }
- return 0;
-}
-
-
-int inflate_codes(tl, td, bl, bd)
-struct huft *tl, *td; /* literal/length and distance decoder tables */
-int bl, bd; /* number of bits decoded by tl[] and td[] */
-/* inflate (decompress) the codes in a deflated (compressed) block.
- Return an error code or zero if it all goes ok. */
-{
- register unsigned e; /* table entry flag/number of extra bits */
- unsigned n, d; /* length and index for copy */
- unsigned w; /* current window position */
- struct huft *t; /* pointer to table entry */
- unsigned ml, md; /* masks for bl and bd bits */
- register ulg b; /* bit buffer */
- register unsigned k; /* number of bits in bit buffer */
-
-
- /* make local copies of globals */
- b = bb; /* initialize bit buffer */
- k = bk;
- w = wp; /* initialize window position */
-
- /* inflate the coded data */
- ml = mask_bits[bl]; /* precompute masks for speed */
- md = mask_bits[bd];
- for (;;) /* do until end of block */
- {
- NEEDBITS((unsigned)bl)
- if ((e = (t = tl + ((unsigned)b & ml))->e) > 16)
- do {
- if (e == 99)
- return 1;
- DUMPBITS(t->b)
- e -= 16;
- NEEDBITS(e)
- } while ((e = (t = t->v.t + ((unsigned)b & mask_bits[e]))->e) > 16);
- DUMPBITS(t->b)
- if (e == 16) /* then it's a literal */
- {
- slide[w++] = (uch)t->v.n;
- Tracevv((stderr, "%c", slide[w-1]));
- if (w == WSIZE)
- {
- flush_output(w);
- w = 0;
- }
- }
- else /* it's an EOB or a length */
- {
- /* exit if end of block */
- if (e == 15)
- break;
-
- /* get length of block to copy */
- NEEDBITS(e)
- n = t->v.n + ((unsigned)b & mask_bits[e]);
- DUMPBITS(e);
-
- /* decode distance of block to copy */
- NEEDBITS((unsigned)bd)
- if ((e = (t = td + ((unsigned)b & md))->e) > 16)
- do {
- if (e == 99)
- return 1;
- DUMPBITS(t->b)
- e -= 16;
- NEEDBITS(e)
- } while ((e = (t = t->v.t + ((unsigned)b & mask_bits[e]))->e) > 16);
- DUMPBITS(t->b)
- NEEDBITS(e)
- d = w - t->v.n - ((unsigned)b & mask_bits[e]);
- DUMPBITS(e)
- Tracevv((stderr,"\\[%d,%d]", w-d, n));
-
- /* do the copy */
- do {
- n -= (e = (e = WSIZE - ((d &= WSIZE-1) > w ? d : w)) > n ? n : e);
-#if !defined(NOMEMCPY) && !defined(DEBUG)
- if (w - d >= e) /* (this test assumes unsigned comparison) */
- {
- memcpy(slide + w, slide + d, e);
- w += e;
- d += e;
- }
- else /* do it slow to avoid memcpy() overlap */
-#endif /* !NOMEMCPY */
- do {
- slide[w++] = slide[d++];
- Tracevv((stderr, "%c", slide[w-1]));
- } while (--e);
- if (w == WSIZE)
- {
- flush_output(w);
- w = 0;
- }
- } while (n);
- }
- }
-
-
- /* restore the globals from the locals */
- wp = w; /* restore global window pointer */
- bb = b; /* restore global bit buffer */
- bk = k;
-
- /* done */
- return 0;
-}
-
-
-
-int inflate_stored()
-/* "decompress" an inflated type 0 (stored) block. */
-{
- unsigned n; /* number of bytes in block */
- unsigned w; /* current window position */
- register ulg b; /* bit buffer */
- register unsigned k; /* number of bits in bit buffer */
-
-
- /* make local copies of globals */
- b = bb; /* initialize bit buffer */
- k = bk;
- w = wp; /* initialize window position */
-
-
- /* go to byte boundary */
- n = k & 7;
- DUMPBITS(n);
-
-
- /* get the length and its complement */
- NEEDBITS(16)
- n = ((unsigned)b & 0xffff);
- DUMPBITS(16)
- NEEDBITS(16)
- if (n != (unsigned)((~b) & 0xffff))
- return 1; /* error in compressed data */
- DUMPBITS(16)
-
-
- /* read and output the compressed data */
- while (n--)
- {
- NEEDBITS(8)
- slide[w++] = (uch)b;
- if (w == WSIZE)
- {
- flush_output(w);
- w = 0;
- }
- DUMPBITS(8)
- }
-
-
- /* restore the globals from the locals */
- wp = w; /* restore global window pointer */
- bb = b; /* restore global bit buffer */
- bk = k;
- return 0;
-}
-
-
-
-int inflate_fixed()
-/* decompress an inflated type 1 (fixed Huffman codes) block. We should
- either replace this with a custom decoder, or at least precompute the
- Huffman tables. */
-{
- int i; /* temporary variable */
- struct huft *tl; /* literal/length code table */
- struct huft *td; /* distance code table */
- int bl; /* lookup bits for tl */
- int bd; /* lookup bits for td */
- unsigned l[288]; /* length list for huft_build */
-
-
- /* set up literal table */
- for (i = 0; i < 144; i++)
- l[i] = 8;
- for (; i < 256; i++)
- l[i] = 9;
- for (; i < 280; i++)
- l[i] = 7;
- for (; i < 288; i++) /* make a complete, but wrong code set */
- l[i] = 8;
- bl = 7;
- if ((i = huft_build(l, 288, 257, cplens, cplext, &tl, &bl)) != 0)
- return i;
-
-
- /* set up distance table */
- for (i = 0; i < 30; i++) /* make an incomplete code set */
- l[i] = 5;
- bd = 5;
- if ((i = huft_build(l, 30, 0, cpdist, cpdext, &td, &bd)) > 1)
- {
- huft_free(tl);
- return i;
- }
-
-
- /* decompress until an end-of-block code */
- if (inflate_codes(tl, td, bl, bd))
- return 1;
-
-
- /* free the decoding tables, return */
- huft_free(tl);
- huft_free(td);
- return 0;
-}
-
-
-
-int inflate_dynamic()
-/* decompress an inflated type 2 (dynamic Huffman codes) block. */
-{
- int i; /* temporary variables */
- unsigned j;
- unsigned l; /* last length */
- unsigned m; /* mask for bit lengths table */
- unsigned n; /* number of lengths to get */
- struct huft *tl; /* literal/length code table */
- struct huft *td; /* distance code table */
- int bl; /* lookup bits for tl */
- int bd; /* lookup bits for td */
- unsigned nb; /* number of bit length codes */
- unsigned nl; /* number of literal/length codes */
- unsigned nd; /* number of distance codes */
-#ifdef PKZIP_BUG_WORKAROUND
- unsigned ll[288+32]; /* literal/length and distance code lengths */
-#else
- unsigned ll[286+30]; /* literal/length and distance code lengths */
-#endif
- register ulg b; /* bit buffer */
- register unsigned k; /* number of bits in bit buffer */
-
-
- /* make local bit buffer */
- b = bb;
- k = bk;
-
-
- /* read in table lengths */
- NEEDBITS(5)
- nl = 257 + ((unsigned)b & 0x1f); /* number of literal/length codes */
- DUMPBITS(5)
- NEEDBITS(5)
- nd = 1 + ((unsigned)b & 0x1f); /* number of distance codes */
- DUMPBITS(5)
- NEEDBITS(4)
- nb = 4 + ((unsigned)b & 0xf); /* number of bit length codes */
- DUMPBITS(4)
-#ifdef PKZIP_BUG_WORKAROUND
- if (nl > 288 || nd > 32)
-#else
- if (nl > 286 || nd > 30)
-#endif
- return 1; /* bad lengths */
-
-
- /* read in bit-length-code lengths */
- for (j = 0; j < nb; j++)
- {
- NEEDBITS(3)
- ll[border[j]] = (unsigned)b & 7;
- DUMPBITS(3)
- }
- for (; j < 19; j++)
- ll[border[j]] = 0;
-
-
- /* build decoding table for trees--single level, 7 bit lookup */
- bl = 7;
- if ((i = huft_build(ll, 19, 19, NULL, NULL, &tl, &bl)) != 0)
- {
- if (i == 1)
- huft_free(tl);
- return i; /* incomplete code set */
- }
-
- if (tl == NULL) /* Grrrhhh */
- return 2;
-
- /* read in literal and distance code lengths */
- n = nl + nd;
- m = mask_bits[bl];
- i = l = 0;
- while ((unsigned)i < n)
- {
- NEEDBITS((unsigned)bl)
- j = (td = tl + ((unsigned)b & m))->b;
- DUMPBITS(j)
- j = td->v.n;
- if (j < 16) /* length of code in bits (0..15) */
- ll[i++] = l = j; /* save last length in l */
- else if (j == 16) /* repeat last length 3 to 6 times */
- {
- NEEDBITS(2)
- j = 3 + ((unsigned)b & 3);
- DUMPBITS(2)
- if ((unsigned)i + j > n)
- return 1;
- while (j--)
- ll[i++] = l;
- }
- else if (j == 17) /* 3 to 10 zero length codes */
- {
- NEEDBITS(3)
- j = 3 + ((unsigned)b & 7);
- DUMPBITS(3)
- if ((unsigned)i + j > n)
- return 1;
- while (j--)
- ll[i++] = 0;
- l = 0;
- }
- else /* j == 18: 11 to 138 zero length codes */
- {
- NEEDBITS(7)
- j = 11 + ((unsigned)b & 0x7f);
- DUMPBITS(7)
- if ((unsigned)i + j > n)
- return 1;
- while (j--)
- ll[i++] = 0;
- l = 0;
- }
- }
-
-
- /* free decoding table for trees */
- huft_free(tl);
-
-
- /* restore the global bit buffer */
- bb = b;
- bk = k;
-
-
- /* build the decoding tables for literal/length and distance codes */
- bl = lbits;
- if ((i = huft_build(ll, nl, 257, cplens, cplext, &tl, &bl)) != 0)
- {
- if (i == 1) {
- fprintf(stderr, " incomplete literal tree\n");
- huft_free(tl);
- }
- return i; /* incomplete code set */
- }
- bd = dbits;
- if ((i = huft_build(ll + nl, nd, 0, cpdist, cpdext, &td, &bd)) != 0)
- {
- if (i == 1) {
- fprintf(stderr, " incomplete distance tree\n");
-#ifdef PKZIP_BUG_WORKAROUND
- i = 0;
- }
-#else
- huft_free(td);
- }
- huft_free(tl);
- return i; /* incomplete code set */
-#endif
- }
-
-
- /* decompress until an end-of-block code */
- if (inflate_codes(tl, td, bl, bd))
- return 1;
-
-
- /* free the decoding tables, return */
- huft_free(tl);
- huft_free(td);
- return 0;
-}
-
-
-
-int inflate_block(e)
-int *e; /* last block flag */
-/* decompress an inflated block */
-{
- unsigned t; /* block type */
- register ulg b; /* bit buffer */
- register unsigned k; /* number of bits in bit buffer */
-
-
- /* make local bit buffer */
- b = bb;
- k = bk;
-
-
- /* read in last block bit */
- NEEDBITS(1)
- *e = (int)b & 1;
- DUMPBITS(1)
-
-
- /* read in block type */
- NEEDBITS(2)
- t = (unsigned)b & 3;
- DUMPBITS(2)
-
-
- /* restore the global bit buffer */
- bb = b;
- bk = k;
-
-
- /* inflate that block type */
- if (t == 2)
- return inflate_dynamic();
- if (t == 0)
- return inflate_stored();
- if (t == 1)
- return inflate_fixed();
-
-
- /* bad block type */
- return 2;
-}
-
-
-
-int inflate()
-/* decompress an inflated entry */
-{
- int e; /* last block flag */
- int r; /* result code */
- unsigned h; /* maximum struct huft's malloc'ed */
-
-
- /* initialize window, bit buffer */
- wp = 0;
- bk = 0;
- bb = 0;
-
-
- /* decompress until the last block */
- h = 0;
- do {
- hufts = 0;
- if ((r = inflate_block(&e)) != 0)
- return r;
- if (hufts > h)
- h = hufts;
- } while (!e);
-
- /* Undo too much lookahead. The next read will be byte aligned so we
- * can discard unused bits in the last meaningful byte.
- */
- while (bk >= 8) {
- bk -= 8;
- inptr--;
- }
-
- /* flush out slide */
- flush_output(wp);
-
-
- /* return success */
-#ifdef DEBUG
- fprintf(stderr, "<%u> ", h);
-#endif /* DEBUG */
- return 0;
-}
diff --git a/isys/gzlib/lzw.c b/isys/gzlib/lzw.c
deleted file mode 100644
index 0dc2fe063..000000000
--- a/isys/gzlib/lzw.c
+++ /dev/null
@@ -1,27 +0,0 @@
-/* lzw.c -- compress files in LZW format.
- * This is a dummy version avoiding patent problems.
- */
-
-#ifdef RCSID
-static char rcsid[] = "$Id$";
-#endif
-
-#include <config.h>
-#include "tailor.h"
-#include "gzip.h"
-#include "lzw.h"
-
-static int msg_done = 0;
-
-/* Compress in to out with lzw method. */
-int lzw(in, out)
- int in, out;
-{
- if (msg_done) return ERROR;
- msg_done = 1;
- fprintf(stderr,"output in compress .Z format not supported\n");
- if (in != out) { /* avoid warnings on unused variables */
- exit_code = ERROR;
- }
- return ERROR;
-}
diff --git a/isys/gzlib/lzw.h b/isys/gzlib/lzw.h
deleted file mode 100644
index 4b7ac8680..000000000
--- a/isys/gzlib/lzw.h
+++ /dev/null
@@ -1,42 +0,0 @@
-/* lzw.h -- define the lzw functions.
- * Copyright (C) 1992-1993 Jean-loup Gailly.
- * This is free software; you can redistribute it and/or modify it under the
- * terms of the GNU General Public License, see the file COPYING.
- */
-
-#if !defined(OF) && defined(lint)
-# include "gzip.h"
-#endif
-
-#ifndef BITS
-# define BITS 16
-#endif
-#define INIT_BITS 9 /* Initial number of bits per code */
-
-#define LZW_MAGIC "\037\235" /* Magic header for lzw files, 1F 9D */
-
-#define BIT_MASK 0x1f /* Mask for 'number of compression bits' */
-/* Mask 0x20 is reserved to mean a fourth header byte, and 0x40 is free.
- * It's a pity that old uncompress does not check bit 0x20. That makes
- * extension of the format actually undesirable because old compress
- * would just crash on the new format instead of giving a meaningful
- * error message. It does check the number of bits, but it's more
- * helpful to say "unsupported format, get a new version" than
- * "can only handle 16 bits".
- */
-
-#define BLOCK_MODE 0x80
-/* Block compression: if table is full and compression rate is dropping,
- * clear the dictionary.
- */
-
-#define LZW_RESERVED 0x60 /* reserved bits */
-
-#define CLEAR 256 /* flush the dictionary */
-#define FIRST (CLEAR+1) /* first free entry */
-
-extern int maxbits; /* max bits per code for LZW */
-extern int block_mode; /* block compress mode -C compatible with 2.0 */
-
-extern int lzw OF((int in, int out));
-extern int unlzw OF((int in, int out));
diff --git a/isys/gzlib/tailor.h b/isys/gzlib/tailor.h
deleted file mode 100644
index 3e45e12c1..000000000
--- a/isys/gzlib/tailor.h
+++ /dev/null
@@ -1,315 +0,0 @@
-/* tailor.h -- target dependent definitions
- * Copyright (C) 1992-1993 Jean-loup Gailly.
- * This is free software; you can redistribute it and/or modify it under the
- * terms of the GNU General Public License, see the file COPYING.
- */
-
-/* The target dependent definitions should be defined here only.
- * The target dependent functions should be defined in tailor.c.
- */
-
-/* $Id$ */
-
-#if defined(__MSDOS__) && !defined(MSDOS)
-# define MSDOS
-#endif
-
-#if defined(__OS2__) && !defined(OS2)
-# define OS2
-#endif
-
-#if defined(OS2) && defined(MSDOS) /* MS C under OS/2 */
-# undef MSDOS
-#endif
-
-#ifdef MSDOS
-# ifdef __GNUC__
- /* DJGPP version 1.09+ on MS-DOS.
- * The DJGPP 1.09 stat() function must be upgraded before gzip will
- * fully work.
- * No need for HAVE_DIRENT_H, since <unistd.h> defines POSIX_SOURCE which
- * implies HAVE_DIRENT_H.
- */
-# define near
-# else
-# define MAXSEG_64K
-# ifdef __TURBOC__
-# define off_t long
-# ifdef __BORLANDC__
-# define HAVE_DIRENT_H
-# define HAVE_UTIME
-# endif
-# define HAVE_UTIME_H
-# else /* MSC */
-# define HAVE_SYS_UTIME_H
-# endif
-# endif
-# define PATH_SEP2 '\\'
-# define PATH_SEP3 ':'
-# define MAX_PATH_LEN 128
-# define NO_MULTIPLE_DOTS
-# define MAX_EXT_CHARS 3
-# define Z_SUFFIX "z"
-# define PROTO
-# define STDC_HEADERS
-# define NO_SIZE_CHECK
-# define UNLINK_READONLY_BUG
-# define casemap(c) tolow(c) /* Force file names to lower case */
-# include <io.h>
-# define OS_CODE 0x00
-# define SET_BINARY_MODE(fd) setmode(fd, O_BINARY)
-# if !defined(NO_ASM) && !defined(ASMV)
-# define ASMV
-# endif
-#else
-# define near
-#endif
-
-#ifdef OS2
-# define PATH_SEP2 '\\'
-# define PATH_SEP3 ':'
-# define MAX_PATH_LEN 260
-# ifdef OS2FAT
-# define NO_MULTIPLE_DOTS
-# define MAX_EXT_CHARS 3
-# define Z_SUFFIX "z"
-# define casemap(c) tolow(c)
-# endif
-# define PROTO
-# define STDC_HEADERS
-# define UNLINK_READONLY_BUG
-# include <io.h>
-# define OS_CODE 0x06
-# define SET_BINARY_MODE(fd) setmode(fd, O_BINARY)
-# ifdef _MSC_VER
-# define HAVE_SYS_UTIME_H
-# define MAXSEG_64K
-# undef near
-# define near _near
-# endif
-# ifdef __EMX__
-# define HAVE_SYS_UTIME_H
-# define HAVE_DIRENT_H
-# define EXPAND(argc,argv) \
- {_response(&argc, &argv); _wildcard(&argc, &argv);}
-# endif
-# ifdef __BORLANDC__
-# define HAVE_DIRENT_H
-# define HAVE_UTIME_H
-# endif
-# ifdef __ZTC__
-# define NO_DIR
-# include <dos.h>
-# define EXPAND(argc,argv) \
- {response_expand(&argc, &argv);}
-# endif
-#endif
-
-#ifdef WIN32 /* Windows NT */
-# define HAVE_SYS_UTIME_H
-# define PATH_SEP2 '\\'
-# define PATH_SEP3 ':'
-# define MAX_PATH_LEN 260
-# define PROTO
-# define STDC_HEADERS
-# define SET_BINARY_MODE(fd) setmode(fd, O_BINARY)
-# define UNLINK_READONLY_BUG
-# include <io.h>
-# include <malloc.h>
-# ifdef NTFAT
-# define NO_MULTIPLE_DOTS
-# define MAX_EXT_CHARS 3
-# define Z_SUFFIX "z"
-# define casemap(c) tolow(c) /* Force file names to lower case */
-# endif
-# define OS_CODE 0x0b
-#endif
-
-#ifdef MSDOS
-# ifdef __TURBOC__
-# include <alloc.h>
-# define DYN_ALLOC
- /* Turbo C 2.0 does not accept static allocations of large arrays */
- void * fcalloc (unsigned items, unsigned size);
- void fcfree (void *ptr);
-# else /* MSC */
-# include <malloc.h>
-# define fcalloc(nitems,itemsize) halloc((long)(nitems),(itemsize))
-# define fcfree(ptr) hfree(ptr)
-# endif
-#else
-# ifdef MAXSEG_64K
-# define fcalloc(items,size) calloc((items),(size))
-# else
-# define fcalloc(items,size) malloc((size_t)(items)*(size_t)(size))
-# endif
-# define fcfree(ptr) free(ptr)
-#endif
-
-#if defined(VAXC) || defined(VMS)
-# define PATH_SEP ']'
-# define PATH_SEP2 ':'
-# define SUFFIX_SEP ';'
-# define NO_MULTIPLE_DOTS
-# define Z_SUFFIX "-gz"
-# define RECORD_IO 1
-# define casemap(c) tolow(c)
-# define OS_CODE 0x02
-# define OPTIONS_VAR "GZIP_OPT"
-# define STDC_HEADERS
-# define EXPAND(argc,argv) vms_expand_args(&argc,&argv);
-# include <file.h>
-# define unlink delete
-# ifdef VAXC
-# include <unixio.h>
-# else
-# define HAVE_FCNTL_H
-# endif
-#endif
-
-#ifdef AMIGA
-# define PATH_SEP2 ':'
-# define STDC_HEADERS
-# define OS_CODE 0x01
-# define ASMV
-# ifdef __GNUC__
-# define HAVE_DIRENT_H
-# define HAVE_FCNTL_H
-# define HAVE_UNISTD_H
-# define HAVE_CHOWN
-# define HAVE_LSTAT
-# else /* SASC */
-# define NO_STDIN_FSTAT
-# define HAVE_SYS_DIR_H
-# include <fcntl.h> /* for read() and write() */
-# define direct dirent
- extern void _expand_args(int *argc, char ***argv);
-# define EXPAND(argc,argv) _expand_args(&argc,&argv);
-# undef O_BINARY /* disable useless --ascii option */
-# endif
-#endif
-
-#if defined(ATARI) || defined(atarist)
-# ifndef STDC_HEADERS
-# define STDC_HEADERS
-# define HAVE_UNISTD_H
-# define HAVE_DIRENT_H
-# endif
-# define ASMV
-# define OS_CODE 0x05
-# ifdef TOSFS
-# define PATH_SEP2 '\\'
-# define PATH_SEP3 ':'
-# define MAX_PATH_LEN 128
-# define NO_MULTIPLE_DOTS
-# define MAX_EXT_CHARS 3
-# define Z_SUFFIX "z"
-# define casemap(c) tolow(c) /* Force file names to lower case */
-# endif
-#endif
-
-#ifdef MACOS
-# define PATH_SEP ':'
-# define DYN_ALLOC
-# define PROTO
-# define NO_STDIN_FSTAT
-# define chmod(file, mode) (0)
-# define OPEN(name, flags, mode) open(name, flags)
-# define OS_CODE 0x07
-# ifdef MPW
-# define isatty(fd) ((fd) <= 2)
-# endif
-#endif
-
-#ifdef __50SERIES /* Prime/PRIMOS */
-# define PATH_SEP '>'
-# define STDC_HEADERS
-# define NO_STDIN_FSTAT
-# define NO_SIZE_CHECK
-# define RECORD_IO 1
-# define casemap(c) tolow(c) /* Force file names to lower case */
-# define put_char(c) put_byte((c) & 0x7F)
-# define get_char(c) ascii2pascii(get_byte())
-# define OS_CODE 0x0F /* temporary, subject to change */
-# ifdef SIGTERM
-# undef SIGTERM /* We don't want a signal handler for SIGTERM */
-# endif
-#endif
-
-#if defined(pyr) && !defined(NOMEMCPY) /* Pyramid */
-# define NOMEMCPY /* problem with overlapping copies */
-#endif
-
-#ifdef TOPS20
-# define OS_CODE 0x0a
-#endif
-
-#ifndef unix
-# define NO_ST_INO /* don't rely on inode numbers */
-#endif
-
-
- /* Common defaults */
-
-#ifndef OS_CODE
-# define OS_CODE 0x03 /* assume Unix */
-#endif
-
-#ifndef PATH_SEP
-# define PATH_SEP '/'
-#endif
-
-#ifndef casemap
-# define casemap(c) (c)
-#endif
-
-#ifndef OPTIONS_VAR
-# define OPTIONS_VAR "GZIP"
-#endif
-
-#ifndef Z_SUFFIX
-# define Z_SUFFIX ".gz"
-#endif
-
-#ifdef MAX_EXT_CHARS
-# define MAX_SUFFIX MAX_EXT_CHARS
-#else
-# define MAX_SUFFIX 30
-#endif
-
-#ifndef MAKE_LEGAL_NAME
-# ifdef NO_MULTIPLE_DOTS
-# define MAKE_LEGAL_NAME(name) make_simple_name(name)
-# else
-# define MAKE_LEGAL_NAME(name)
-# endif
-#endif
-
-#ifndef MIN_PART
-# define MIN_PART 3
- /* keep at least MIN_PART chars between dots in a file name. */
-#endif
-
-#ifndef EXPAND
-# define EXPAND(argc,argv)
-#endif
-
-#ifndef RECORD_IO
-# define RECORD_IO 0
-#endif
-
-#ifndef SET_BINARY_MODE
-# define SET_BINARY_MODE(fd)
-#endif
-
-#ifndef OPEN
-# define OPEN(name, flags, mode) open(name, flags, mode)
-#endif
-
-#ifndef get_char
-# define get_char() get_byte()
-#endif
-
-#ifndef put_char
-# define put_char(c) put_byte(c)
-#endif
diff --git a/isys/gzlib/test.c b/isys/gzlib/test.c
deleted file mode 100644
index 227df6928..000000000
--- a/isys/gzlib/test.c
+++ /dev/null
@@ -1,39 +0,0 @@
-#include <errno.h>
-#include <fcntl.h>
-#include <stdio.h>
-#include <string.h>
-#include <unistd.h>
-
-#include "gzlib.h"
-
-int main(int argc, char ** argv) {
- gzFile fd;
- char buf[4096];
- int i;
-
- if (argv[1]) {
- if (!strcmp(argv[1], "-d")) {
- fd = gunzip_dopen(0);
- while ((i = gunzip_read(fd, buf, sizeof(buf))) > 0)
- if (write(1, buf, i) != i) break;
- if (i != 0) {
- fprintf(stderr, "error occured: %s\n", strerror(errno));
- return -1;
- }
- } else {
- fprintf(stderr, "unknown argument\n");
- return -1;
- }
- } else {
- fd = gzip_dopen(1);
- while ((i = read(0, buf, sizeof(buf))) > 0)
- if (gzip_write(fd, buf, i) != i) break;
-
- if (i != 0) {
- fprintf(stderr, "error occured: %s\n", strerror(errno));
- return -1;
- }
- }
-
- return 0;
-}
diff --git a/isys/gzlib/trees.c b/isys/gzlib/trees.c
deleted file mode 100644
index 704c3ab6d..000000000
--- a/isys/gzlib/trees.c
+++ /dev/null
@@ -1,1069 +0,0 @@
-/* trees.c -- output deflated data using Huffman coding
- * Copyright (C) 1992-1993 Jean-loup Gailly
- * This is free software; you can redistribute it and/or modify it under the
- * terms of the GNU General Public License, see the file COPYING.
- */
-
-/*
- * PURPOSE
- *
- * Encode various sets of source values using variable-length
- * binary code trees.
- *
- * DISCUSSION
- *
- * The PKZIP "deflation" process uses several Huffman trees. The more
- * common source values are represented by shorter bit sequences.
- *
- * Each code tree is stored in the ZIP file in a compressed form
- * which is itself a Huffman encoding of the lengths of
- * all the code strings (in ascending order by source values).
- * The actual code strings are reconstructed from the lengths in
- * the UNZIP process, as described in the "application note"
- * (APPNOTE.TXT) distributed as part of PKWARE's PKZIP program.
- *
- * REFERENCES
- *
- * Lynch, Thomas J.
- * Data Compression: Techniques and Applications, pp. 53-55.
- * Lifetime Learning Publications, 1985. ISBN 0-534-03418-7.
- *
- * Storer, James A.
- * Data Compression: Methods and Theory, pp. 49-50.
- * Computer Science Press, 1988. ISBN 0-7167-8156-5.
- *
- * Sedgewick, R.
- * Algorithms, p290.
- * Addison-Wesley, 1983. ISBN 0-201-06672-6.
- *
- * INTERFACE
- *
- * void ct_init (ush *attr, int *methodp)
- * Allocate the match buffer, initialize the various tables and save
- * the location of the internal file attribute (ascii/binary) and
- * method (DEFLATE/STORE)
- *
- * void ct_tally (int dist, int lc);
- * Save the match info and tally the frequency counts.
- *
- * off_t flush_block (char *buf, ulg stored_len, int eof)
- * Determine the best encoding for the current block: dynamic trees,
- * static trees or store, and output the encoded block to the zip
- * file. Returns the total compressed length for the file so far.
- *
- */
-
-#include <config.h>
-#include <ctype.h>
-
-#include "tailor.h"
-#include "gzip.h"
-
-#ifdef RCSID
-static char rcsid[] = "$Id$";
-#endif
-
-/* ===========================================================================
- * Constants
- */
-
-#define MAX_BITS 15
-/* All codes must not exceed MAX_BITS bits */
-
-#define MAX_BL_BITS 7
-/* Bit length codes must not exceed MAX_BL_BITS bits */
-
-#define LENGTH_CODES 29
-/* number of length codes, not counting the special END_BLOCK code */
-
-#define LITERALS 256
-/* number of literal bytes 0..255 */
-
-#define END_BLOCK 256
-/* end of block literal code */
-
-#define L_CODES (LITERALS+1+LENGTH_CODES)
-/* number of Literal or Length codes, including the END_BLOCK code */
-
-#define D_CODES 30
-/* number of distance codes */
-
-#define BL_CODES 19
-/* number of codes used to transfer the bit lengths */
-
-
-local int near extra_lbits[LENGTH_CODES] /* extra bits for each length code */
- = {0,0,0,0,0,0,0,0,1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,5,5,5,5,0};
-
-local int near extra_dbits[D_CODES] /* extra bits for each distance code */
- = {0,0,0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,12,12,13,13};
-
-local int near extra_blbits[BL_CODES]/* extra bits for each bit length code */
- = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,3,7};
-
-#define STORED_BLOCK 0
-#define STATIC_TREES 1
-#define DYN_TREES 2
-/* The three kinds of block type */
-
-#ifndef LIT_BUFSIZE
-# ifdef SMALL_MEM
-# define LIT_BUFSIZE 0x2000
-# else
-# ifdef MEDIUM_MEM
-# define LIT_BUFSIZE 0x4000
-# else
-# define LIT_BUFSIZE 0x8000
-# endif
-# endif
-#endif
-#ifndef DIST_BUFSIZE
-# define DIST_BUFSIZE LIT_BUFSIZE
-#endif
-/* Sizes of match buffers for literals/lengths and distances. There are
- * 4 reasons for limiting LIT_BUFSIZE to 64K:
- * - frequencies can be kept in 16 bit counters
- * - if compression is not successful for the first block, all input data is
- * still in the window so we can still emit a stored block even when input
- * comes from standard input. (This can also be done for all blocks if
- * LIT_BUFSIZE is not greater than 32K.)
- * - if compression is not successful for a file smaller than 64K, we can
- * even emit a stored file instead of a stored block (saving 5 bytes).
- * - creating new Huffman trees less frequently may not provide fast
- * adaptation to changes in the input data statistics. (Take for
- * example a binary file with poorly compressible code followed by
- * a highly compressible string table.) Smaller buffer sizes give
- * fast adaptation but have of course the overhead of transmitting trees
- * more frequently.
- * - I can't count above 4
- * The current code is general and allows DIST_BUFSIZE < LIT_BUFSIZE (to save
- * memory at the expense of compression). Some optimizations would be possible
- * if we rely on DIST_BUFSIZE == LIT_BUFSIZE.
- */
-#if LIT_BUFSIZE > INBUFSIZ
- error cannot overlay l_buf and inbuf
-#endif
-
-#define REP_3_6 16
-/* repeat previous bit length 3-6 times (2 bits of repeat count) */
-
-#define REPZ_3_10 17
-/* repeat a zero length 3-10 times (3 bits of repeat count) */
-
-#define REPZ_11_138 18
-/* repeat a zero length 11-138 times (7 bits of repeat count) */
-
-/* ===========================================================================
- * Local data
- */
-
-/* Data structure describing a single value and its code string. */
-typedef struct ct_data {
- union {
- ush freq; /* frequency count */
- ush code; /* bit string */
- } fc;
- union {
- ush dad; /* father node in Huffman tree */
- ush len; /* length of bit string */
- } dl;
-} ct_data;
-
-#define Freq fc.freq
-#define Code fc.code
-#define Dad dl.dad
-#define Len dl.len
-
-#define HEAP_SIZE (2*L_CODES+1)
-/* maximum heap size */
-
-local ct_data near dyn_ltree[HEAP_SIZE]; /* literal and length tree */
-local ct_data near dyn_dtree[2*D_CODES+1]; /* distance tree */
-
-local ct_data near static_ltree[L_CODES+2];
-/* The static literal tree. Since the bit lengths are imposed, there is no
- * need for the L_CODES extra codes used during heap construction. However
- * The codes 286 and 287 are needed to build a canonical tree (see ct_init
- * below).
- */
-
-local ct_data near static_dtree[D_CODES];
-/* The static distance tree. (Actually a trivial tree since all codes use
- * 5 bits.)
- */
-
-local ct_data near bl_tree[2*BL_CODES+1];
-/* Huffman tree for the bit lengths */
-
-typedef struct tree_desc {
- ct_data near *dyn_tree; /* the dynamic tree */
- ct_data near *static_tree; /* corresponding static tree or NULL */
- int near *extra_bits; /* extra bits for each code or NULL */
- int extra_base; /* base index for extra_bits */
- int elems; /* max number of elements in the tree */
- int max_length; /* max bit length for the codes */
- int max_code; /* largest code with non zero frequency */
-} tree_desc;
-
-local tree_desc near l_desc =
-{dyn_ltree, static_ltree, extra_lbits, LITERALS+1, L_CODES, MAX_BITS, 0};
-
-local tree_desc near d_desc =
-{dyn_dtree, static_dtree, extra_dbits, 0, D_CODES, MAX_BITS, 0};
-
-local tree_desc near bl_desc =
-{bl_tree, (ct_data near *)0, extra_blbits, 0, BL_CODES, MAX_BL_BITS, 0};
-
-
-local ush near bl_count[MAX_BITS+1];
-/* number of codes at each bit length for an optimal tree */
-
-local uch near bl_order[BL_CODES]
- = {16,17,18,0,8,7,9,6,10,5,11,4,12,3,13,2,14,1,15};
-/* The lengths of the bit length codes are sent in order of decreasing
- * probability, to avoid transmitting the lengths for unused bit length codes.
- */
-
-local int near heap[2*L_CODES+1]; /* heap used to build the Huffman trees */
-local int heap_len; /* number of elements in the heap */
-local int heap_max; /* element of largest frequency */
-/* The sons of heap[n] are heap[2*n] and heap[2*n+1]. heap[0] is not used.
- * The same heap array is used to build all trees.
- */
-
-local uch near depth[2*L_CODES+1];
-/* Depth of each subtree used as tie breaker for trees of equal frequency */
-
-local uch length_code[MAX_MATCH-MIN_MATCH+1];
-/* length code for each normalized match length (0 == MIN_MATCH) */
-
-local uch dist_code[512];
-/* distance codes. The first 256 values correspond to the distances
- * 3 .. 258, the last 256 values correspond to the top 8 bits of
- * the 15 bit distances.
- */
-
-local int near base_length[LENGTH_CODES];
-/* First normalized length for each code (0 = MIN_MATCH) */
-
-local int near base_dist[D_CODES];
-/* First normalized distance for each code (0 = distance of 1) */
-
-#define l_buf inbuf
-/* DECLARE(uch, l_buf, LIT_BUFSIZE); buffer for literals or lengths */
-
-/* DECLARE(ush, d_buf, DIST_BUFSIZE); buffer for distances */
-
-local uch near flag_buf[(LIT_BUFSIZE/8)];
-/* flag_buf is a bit array distinguishing literals from lengths in
- * l_buf, thus indicating the presence or absence of a distance.
- */
-
-local unsigned last_lit; /* running index in l_buf */
-local unsigned last_dist; /* running index in d_buf */
-local unsigned last_flags; /* running index in flag_buf */
-local uch flags; /* current flags not yet saved in flag_buf */
-local uch flag_bit; /* current bit used in flags */
-/* bits are filled in flags starting at bit 0 (least significant).
- * Note: these flags are overkill in the current code since we don't
- * take advantage of DIST_BUFSIZE == LIT_BUFSIZE.
- */
-
-local ulg opt_len; /* bit length of current block with optimal trees */
-local ulg static_len; /* bit length of current block with static trees */
-
-local off_t compressed_len; /* total bit length of compressed file */
-
-local off_t input_len; /* total byte length of input file */
-/* input_len is for debugging only since we can get it by other means. */
-
-ush *file_type; /* pointer to UNKNOWN, BINARY or ASCII */
-int *file_method; /* pointer to DEFLATE or STORE */
-
-#ifdef DEBUG
-extern off_t bits_sent; /* bit length of the compressed data */
-#endif
-
-extern long block_start; /* window offset of current block */
-extern unsigned near strstart; /* window offset of current string */
-
-/* ===========================================================================
- * Local (static) routines in this file.
- */
-
-local void init_block OF((void));
-local void pqdownheap OF((ct_data near *tree, int k));
-local void gen_bitlen OF((tree_desc near *desc));
-local void gen_codes OF((ct_data near *tree, int max_code));
-local void build_tree OF((tree_desc near *desc));
-local void scan_tree OF((ct_data near *tree, int max_code));
-local void send_tree OF((ct_data near *tree, int max_code));
-local int build_bl_tree OF((void));
-local void send_all_trees OF((int lcodes, int dcodes, int blcodes));
-local void compress_block OF((ct_data near *ltree, ct_data near *dtree));
-local void set_file_type OF((void));
-
-
-#ifndef DEBUG
-# define send_code(c, tree) send_bits(tree[c].Code, tree[c].Len)
- /* Send a code of the given tree. c and tree must not have side effects */
-
-#else /* DEBUG */
-# define send_code(c, tree) \
- { send_bits(tree[c].Code, tree[c].Len); }
-#endif
-
-#define d_code(dist) \
- ((dist) < 256 ? dist_code[dist] : dist_code[256+((dist)>>7)])
-/* Mapping from a distance to a distance code. dist is the distance - 1 and
- * must not have side effects. dist_code[256] and dist_code[257] are never
- * used.
- */
-
-#define MAX(a,b) (a >= b ? a : b)
-/* the arguments must not have side effects */
-
-/* ===========================================================================
- * Allocate the match buffer, initialize the various tables and save the
- * location of the internal file attribute (ascii/binary) and method
- * (DEFLATE/STORE).
- */
-void ct_init(attr, methodp)
- ush *attr; /* pointer to internal file attribute */
- int *methodp; /* pointer to compression method */
-{
- int n; /* iterates over tree elements */
- int bits; /* bit counter */
- int length; /* length value */
- int code; /* code value */
- int dist; /* distance index */
-
- file_type = attr;
- file_method = methodp;
- compressed_len = input_len = 0L;
-
- if (static_dtree[0].Len != 0) return; /* ct_init already called */
-
- /* Initialize the mapping length (0..255) -> length code (0..28) */
- length = 0;
- for (code = 0; code < LENGTH_CODES-1; code++) {
- base_length[code] = length;
- for (n = 0; n < (1<<extra_lbits[code]); n++) {
- length_code[length++] = (uch)code;
- }
- }
- Assert (length == 256, "ct_init: length != 256");
- /* Note that the length 255 (match length 258) can be represented
- * in two different ways: code 284 + 5 bits or code 285, so we
- * overwrite length_code[255] to use the best encoding:
- */
- length_code[length-1] = (uch)code;
-
- /* Initialize the mapping dist (0..32K) -> dist code (0..29) */
- dist = 0;
- for (code = 0 ; code < 16; code++) {
- base_dist[code] = dist;
- for (n = 0; n < (1<<extra_dbits[code]); n++) {
- dist_code[dist++] = (uch)code;
- }
- }
- Assert (dist == 256, "ct_init: dist != 256");
- dist >>= 7; /* from now on, all distances are divided by 128 */
- for ( ; code < D_CODES; code++) {
- base_dist[code] = dist << 7;
- for (n = 0; n < (1<<(extra_dbits[code]-7)); n++) {
- dist_code[256 + dist++] = (uch)code;
- }
- }
- Assert (dist == 256, "ct_init: 256+dist != 512");
-
- /* Construct the codes of the static literal tree */
- for (bits = 0; bits <= MAX_BITS; bits++) bl_count[bits] = 0;
- n = 0;
- while (n <= 143) static_ltree[n++].Len = 8, bl_count[8]++;
- while (n <= 255) static_ltree[n++].Len = 9, bl_count[9]++;
- while (n <= 279) static_ltree[n++].Len = 7, bl_count[7]++;
- while (n <= 287) static_ltree[n++].Len = 8, bl_count[8]++;
- /* Codes 286 and 287 do not exist, but we must include them in the
- * tree construction to get a canonical Huffman tree (longest code
- * all ones)
- */
- gen_codes((ct_data near *)static_ltree, L_CODES+1);
-
- /* The static distance tree is trivial: */
- for (n = 0; n < D_CODES; n++) {
- static_dtree[n].Len = 5;
- static_dtree[n].Code = bi_reverse(n, 5);
- }
-
- /* Initialize the first block of the first file: */
- init_block();
-}
-
-/* ===========================================================================
- * Initialize a new block.
- */
-local void init_block()
-{
- int n; /* iterates over tree elements */
-
- /* Initialize the trees. */
- for (n = 0; n < L_CODES; n++) dyn_ltree[n].Freq = 0;
- for (n = 0; n < D_CODES; n++) dyn_dtree[n].Freq = 0;
- for (n = 0; n < BL_CODES; n++) bl_tree[n].Freq = 0;
-
- dyn_ltree[END_BLOCK].Freq = 1;
- opt_len = static_len = 0L;
- last_lit = last_dist = last_flags = 0;
- flags = 0; flag_bit = 1;
-}
-
-#define SMALLEST 1
-/* Index within the heap array of least frequent node in the Huffman tree */
-
-
-/* ===========================================================================
- * Remove the smallest element from the heap and recreate the heap with
- * one less element. Updates heap and heap_len.
- */
-#define pqremove(tree, top) \
-{\
- top = heap[SMALLEST]; \
- heap[SMALLEST] = heap[heap_len--]; \
- pqdownheap(tree, SMALLEST); \
-}
-
-/* ===========================================================================
- * Compares to subtrees, using the tree depth as tie breaker when
- * the subtrees have equal frequency. This minimizes the worst case length.
- */
-#define smaller(tree, n, m) \
- (tree[n].Freq < tree[m].Freq || \
- (tree[n].Freq == tree[m].Freq && depth[n] <= depth[m]))
-
-/* ===========================================================================
- * Restore the heap property by moving down the tree starting at node k,
- * exchanging a node with the smallest of its two sons if necessary, stopping
- * when the heap property is re-established (each father smaller than its
- * two sons).
- */
-local void pqdownheap(tree, k)
- ct_data near *tree; /* the tree to restore */
- int k; /* node to move down */
-{
- int v = heap[k];
- int j = k << 1; /* left son of k */
- while (j <= heap_len) {
- /* Set j to the smallest of the two sons: */
- if (j < heap_len && smaller(tree, heap[j+1], heap[j])) j++;
-
- /* Exit if v is smaller than both sons */
- if (smaller(tree, v, heap[j])) break;
-
- /* Exchange v with the smallest son */
- heap[k] = heap[j]; k = j;
-
- /* And continue down the tree, setting j to the left son of k */
- j <<= 1;
- }
- heap[k] = v;
-}
-
-/* ===========================================================================
- * Compute the optimal bit lengths for a tree and update the total bit length
- * for the current block.
- * IN assertion: the fields freq and dad are set, heap[heap_max] and
- * above are the tree nodes sorted by increasing frequency.
- * OUT assertions: the field len is set to the optimal bit length, the
- * array bl_count contains the frequencies for each bit length.
- * The length opt_len is updated; static_len is also updated if stree is
- * not null.
- */
-local void gen_bitlen(desc)
- tree_desc near *desc; /* the tree descriptor */
-{
- ct_data near *tree = desc->dyn_tree;
- int near *extra = desc->extra_bits;
- int base = desc->extra_base;
- int max_code = desc->max_code;
- int max_length = desc->max_length;
- ct_data near *stree = desc->static_tree;
- int h; /* heap index */
- int n, m; /* iterate over the tree elements */
- int bits; /* bit length */
- int xbits; /* extra bits */
- ush f; /* frequency */
- int overflow = 0; /* number of elements with bit length too large */
-
- for (bits = 0; bits <= MAX_BITS; bits++) bl_count[bits] = 0;
-
- /* In a first pass, compute the optimal bit lengths (which may
- * overflow in the case of the bit length tree).
- */
- tree[heap[heap_max]].Len = 0; /* root of the heap */
-
- for (h = heap_max+1; h < HEAP_SIZE; h++) {
- n = heap[h];
- bits = tree[tree[n].Dad].Len + 1;
- if (bits > max_length) bits = max_length, overflow++;
- tree[n].Len = (ush)bits;
- /* We overwrite tree[n].Dad which is no longer needed */
-
- if (n > max_code) continue; /* not a leaf node */
-
- bl_count[bits]++;
- xbits = 0;
- if (n >= base) xbits = extra[n-base];
- f = tree[n].Freq;
- opt_len += (ulg)f * (bits + xbits);
- if (stree) static_len += (ulg)f * (stree[n].Len + xbits);
- }
- if (overflow == 0) return;
-
- Trace((stderr,"\nbit length overflow\n"));
- /* This happens for example on obj2 and pic of the Calgary corpus */
-
- /* Find the first bit length which could increase: */
- do {
- bits = max_length-1;
- while (bl_count[bits] == 0) bits--;
- bl_count[bits]--; /* move one leaf down the tree */
- bl_count[bits+1] += 2; /* move one overflow item as its brother */
- bl_count[max_length]--;
- /* The brother of the overflow item also moves one step up,
- * but this does not affect bl_count[max_length]
- */
- overflow -= 2;
- } while (overflow > 0);
-
- /* Now recompute all bit lengths, scanning in increasing frequency.
- * h is still equal to HEAP_SIZE. (It is simpler to reconstruct all
- * lengths instead of fixing only the wrong ones. This idea is taken
- * from 'ar' written by Haruhiko Okumura.)
- */
- for (bits = max_length; bits != 0; bits--) {
- n = bl_count[bits];
- while (n != 0) {
- m = heap[--h];
- if (m > max_code) continue;
- if (tree[m].Len != (unsigned) bits) {
- Trace((stderr,"code %d bits %d->%d\n", m, tree[m].Len, bits));
- opt_len += ((long)bits-(long)tree[m].Len)*(long)tree[m].Freq;
- tree[m].Len = (ush)bits;
- }
- n--;
- }
- }
-}
-
-/* ===========================================================================
- * Generate the codes for a given tree and bit counts (which need not be
- * optimal).
- * IN assertion: the array bl_count contains the bit length statistics for
- * the given tree and the field len is set for all tree elements.
- * OUT assertion: the field code is set for all tree elements of non
- * zero code length.
- */
-local void gen_codes (tree, max_code)
- ct_data near *tree; /* the tree to decorate */
- int max_code; /* largest code with non zero frequency */
-{
- ush next_code[MAX_BITS+1]; /* next code value for each bit length */
- ush code = 0; /* running code value */
- int bits; /* bit index */
- int n; /* code index */
-
- /* The distribution counts are first used to generate the code values
- * without bit reversal.
- */
- for (bits = 1; bits <= MAX_BITS; bits++) {
- next_code[bits] = code = (code + bl_count[bits-1]) << 1;
- }
- /* Check that the bit counts in bl_count are consistent. The last code
- * must be all ones.
- */
- Assert (code + bl_count[MAX_BITS]-1 == (1<<MAX_BITS)-1,
- "inconsistent bit counts");
- Tracev((stderr,"\ngen_codes: max_code %d ", max_code));
-
- for (n = 0; n <= max_code; n++) {
- int len = tree[n].Len;
- if (len == 0) continue;
- /* Now reverse the bits */
- tree[n].Code = bi_reverse(next_code[len]++, len);
-
- Tracec(tree != static_ltree, (stderr,"\nn %3d %c l %2d c %4x (%x) ",
- n, (isgraph(n) ? n : ' '), len, tree[n].Code, next_code[len]-1));
- }
-}
-
-/* ===========================================================================
- * Construct one Huffman tree and assigns the code bit strings and lengths.
- * Update the total bit length for the current block.
- * IN assertion: the field freq is set for all tree elements.
- * OUT assertions: the fields len and code are set to the optimal bit length
- * and corresponding code. The length opt_len is updated; static_len is
- * also updated if stree is not null. The field max_code is set.
- */
-local void build_tree(desc)
- tree_desc near *desc; /* the tree descriptor */
-{
- ct_data near *tree = desc->dyn_tree;
- ct_data near *stree = desc->static_tree;
- int elems = desc->elems;
- int n, m; /* iterate over heap elements */
- int max_code = -1; /* largest code with non zero frequency */
- int node = elems; /* next internal node of the tree */
-
- /* Construct the initial heap, with least frequent element in
- * heap[SMALLEST]. The sons of heap[n] are heap[2*n] and heap[2*n+1].
- * heap[0] is not used.
- */
- heap_len = 0, heap_max = HEAP_SIZE;
-
- for (n = 0; n < elems; n++) {
- if (tree[n].Freq != 0) {
- heap[++heap_len] = max_code = n;
- depth[n] = 0;
- } else {
- tree[n].Len = 0;
- }
- }
-
- /* The pkzip format requires that at least one distance code exists,
- * and that at least one bit should be sent even if there is only one
- * possible code. So to avoid special checks later on we force at least
- * two codes of non zero frequency.
- */
- while (heap_len < 2) {
- int new = heap[++heap_len] = (max_code < 2 ? ++max_code : 0);
- tree[new].Freq = 1;
- depth[new] = 0;
- opt_len--; if (stree) static_len -= stree[new].Len;
- /* new is 0 or 1 so it does not have extra bits */
- }
- desc->max_code = max_code;
-
- /* The elements heap[heap_len/2+1 .. heap_len] are leaves of the tree,
- * establish sub-heaps of increasing lengths:
- */
- for (n = heap_len/2; n >= 1; n--) pqdownheap(tree, n);
-
- /* Construct the Huffman tree by repeatedly combining the least two
- * frequent nodes.
- */
- do {
- pqremove(tree, n); /* n = node of least frequency */
- m = heap[SMALLEST]; /* m = node of next least frequency */
-
- heap[--heap_max] = n; /* keep the nodes sorted by frequency */
- heap[--heap_max] = m;
-
- /* Create a new node father of n and m */
- tree[node].Freq = tree[n].Freq + tree[m].Freq;
- depth[node] = (uch) (MAX(depth[n], depth[m]) + 1);
- tree[n].Dad = tree[m].Dad = (ush)node;
-#ifdef DUMP_BL_TREE
- if (tree == bl_tree) {
- fprintf(stderr,"\nnode %d(%d), sons %d(%d) %d(%d)",
- node, tree[node].Freq, n, tree[n].Freq, m, tree[m].Freq);
- }
-#endif
- /* and insert the new node in the heap */
- heap[SMALLEST] = node++;
- pqdownheap(tree, SMALLEST);
-
- } while (heap_len >= 2);
-
- heap[--heap_max] = heap[SMALLEST];
-
- /* At this point, the fields freq and dad are set. We can now
- * generate the bit lengths.
- */
- gen_bitlen((tree_desc near *)desc);
-
- /* The field len is now set, we can generate the bit codes */
- gen_codes ((ct_data near *)tree, max_code);
-}
-
-/* ===========================================================================
- * Scan a literal or distance tree to determine the frequencies of the codes
- * in the bit length tree. Updates opt_len to take into account the repeat
- * counts. (The contribution of the bit length codes will be added later
- * during the construction of bl_tree.)
- */
-local void scan_tree (tree, max_code)
- ct_data near *tree; /* the tree to be scanned */
- int max_code; /* and its largest code of non zero frequency */
-{
- int n; /* iterates over all tree elements */
- int prevlen = -1; /* last emitted length */
- int curlen; /* length of current code */
- int nextlen = tree[0].Len; /* length of next code */
- int count = 0; /* repeat count of the current code */
- int max_count = 7; /* max repeat count */
- int min_count = 4; /* min repeat count */
-
- if (nextlen == 0) max_count = 138, min_count = 3;
- tree[max_code+1].Len = (ush)0xffff; /* guard */
-
- for (n = 0; n <= max_code; n++) {
- curlen = nextlen; nextlen = tree[n+1].Len;
- if (++count < max_count && curlen == nextlen) {
- continue;
- } else if (count < min_count) {
- bl_tree[curlen].Freq += count;
- } else if (curlen != 0) {
- if (curlen != prevlen) bl_tree[curlen].Freq++;
- bl_tree[REP_3_6].Freq++;
- } else if (count <= 10) {
- bl_tree[REPZ_3_10].Freq++;
- } else {
- bl_tree[REPZ_11_138].Freq++;
- }
- count = 0; prevlen = curlen;
- if (nextlen == 0) {
- max_count = 138, min_count = 3;
- } else if (curlen == nextlen) {
- max_count = 6, min_count = 3;
- } else {
- max_count = 7, min_count = 4;
- }
- }
-}
-
-/* ===========================================================================
- * Send a literal or distance tree in compressed form, using the codes in
- * bl_tree.
- */
-local void send_tree (tree, max_code)
- ct_data near *tree; /* the tree to be scanned */
- int max_code; /* and its largest code of non zero frequency */
-{
- int n; /* iterates over all tree elements */
- int prevlen = -1; /* last emitted length */
- int curlen; /* length of current code */
- int nextlen = tree[0].Len; /* length of next code */
- int count = 0; /* repeat count of the current code */
- int max_count = 7; /* max repeat count */
- int min_count = 4; /* min repeat count */
-
- /* tree[max_code+1].Len = -1; */ /* guard already set */
- if (nextlen == 0) max_count = 138, min_count = 3;
-
- for (n = 0; n <= max_code; n++) {
- curlen = nextlen; nextlen = tree[n+1].Len;
- if (++count < max_count && curlen == nextlen) {
- continue;
- } else if (count < min_count) {
- do { send_code(curlen, bl_tree); } while (--count != 0);
-
- } else if (curlen != 0) {
- if (curlen != prevlen) {
- send_code(curlen, bl_tree); count--;
- }
- Assert(count >= 3 && count <= 6, " 3_6?");
- send_code(REP_3_6, bl_tree); send_bits(count-3, 2);
-
- } else if (count <= 10) {
- send_code(REPZ_3_10, bl_tree); send_bits(count-3, 3);
-
- } else {
- send_code(REPZ_11_138, bl_tree); send_bits(count-11, 7);
- }
- count = 0; prevlen = curlen;
- if (nextlen == 0) {
- max_count = 138, min_count = 3;
- } else if (curlen == nextlen) {
- max_count = 6, min_count = 3;
- } else {
- max_count = 7, min_count = 4;
- }
- }
-}
-
-/* ===========================================================================
- * Construct the Huffman tree for the bit lengths and return the index in
- * bl_order of the last bit length code to send.
- */
-local int build_bl_tree()
-{
- int max_blindex; /* index of last bit length code of non zero freq */
-
- /* Determine the bit length frequencies for literal and distance trees */
- scan_tree((ct_data near *)dyn_ltree, l_desc.max_code);
- scan_tree((ct_data near *)dyn_dtree, d_desc.max_code);
-
- /* Build the bit length tree: */
- build_tree((tree_desc near *)(&bl_desc));
- /* opt_len now includes the length of the tree representations, except
- * the lengths of the bit lengths codes and the 5+5+4 bits for the counts.
- */
-
- /* Determine the number of bit length codes to send. The pkzip format
- * requires that at least 4 bit length codes be sent. (appnote.txt says
- * 3 but the actual value used is 4.)
- */
- for (max_blindex = BL_CODES-1; max_blindex >= 3; max_blindex--) {
- if (bl_tree[bl_order[max_blindex]].Len != 0) break;
- }
- /* Update opt_len to include the bit length tree and counts */
- opt_len += 3*(max_blindex+1) + 5+5+4;
- Tracev((stderr, "\ndyn trees: dyn %lu, stat %lu", opt_len, static_len));
-
- return max_blindex;
-}
-
-/* ===========================================================================
- * Send the header for a block using dynamic Huffman trees: the counts, the
- * lengths of the bit length codes, the literal tree and the distance tree.
- * IN assertion: lcodes >= 257, dcodes >= 1, blcodes >= 4.
- */
-local void send_all_trees(lcodes, dcodes, blcodes)
- int lcodes, dcodes, blcodes; /* number of codes for each tree */
-{
- int rank; /* index in bl_order */
-
- Assert (lcodes >= 257 && dcodes >= 1 && blcodes >= 4, "not enough codes");
- Assert (lcodes <= L_CODES && dcodes <= D_CODES && blcodes <= BL_CODES,
- "too many codes");
- Tracev((stderr, "\nbl counts: "));
- send_bits(lcodes-257, 5); /* not +255 as stated in appnote.txt */
- send_bits(dcodes-1, 5);
- send_bits(blcodes-4, 4); /* not -3 as stated in appnote.txt */
- for (rank = 0; rank < blcodes; rank++) {
- Tracev((stderr, "\nbl code %2d ", bl_order[rank]));
- send_bits(bl_tree[bl_order[rank]].Len, 3);
- }
-
- send_tree((ct_data near *)dyn_ltree, lcodes-1); /* send the literal tree */
-
- send_tree((ct_data near *)dyn_dtree, dcodes-1); /* send the distance tree */
-}
-
-/* ===========================================================================
- * 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.
- */
-off_t flush_block(buf, stored_len, eof)
- char *buf; /* input block, or NULL if too old */
- ulg stored_len; /* length of input block */
- int eof; /* true if this is the last block for a file */
-{
- ulg opt_lenb, static_lenb; /* opt_len and static_len in bytes */
- int max_blindex; /* index of last bit length code of non zero freq */
-
- flag_buf[last_flags] = flags; /* Save the flags for the last 8 items */
-
- /* Check if the file is ascii or binary */
- if (*file_type == (ush)UNKNOWN) set_file_type();
-
- /* Construct the literal and distance trees */
- build_tree((tree_desc near *)(&l_desc));
- Tracev((stderr, "\nlit data: dyn %lu, stat %lu", opt_len, static_len));
-
- build_tree((tree_desc near *)(&d_desc));
- Tracev((stderr, "\ndist data: dyn %lu, stat %lu", opt_len, static_len));
- /* At this point, opt_len and static_len are the total bit lengths of
- * the compressed block data, excluding the tree representations.
- */
-
- /* Build the bit length tree for the above two trees, and get the index
- * in bl_order of the last bit length code to send.
- */
- max_blindex = build_bl_tree();
-
- /* Determine the best encoding. Compute first the block length in bytes */
- opt_lenb = (opt_len+3+7)>>3;
- static_lenb = (static_len+3+7)>>3;
- input_len += stored_len; /* for debugging only */
-
- Trace((stderr, "\nopt %lu(%lu) stat %lu(%lu) stored %lu lit %u dist %u ",
- opt_lenb, opt_len, static_lenb, static_len, stored_len,
- last_lit, last_dist));
-
- if (static_lenb <= opt_lenb) opt_lenb = static_lenb;
-
- /* 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 FORCE_METHOD
- if (level == 1 && eof && compressed_len == 0L) { /* force stored file */
-#else
- if (stored_len <= opt_lenb && eof && compressed_len == 0L && seekable()) {
-#endif
- /* Since LIT_BUFSIZE <= 2*WSIZE, the input data must be there: */
- if (buf == (char*)0) gzerror ("block vanished");
-
- copy_block(buf, (unsigned)stored_len, 0); /* without header */
- compressed_len = stored_len << 3;
- *file_method = STORED;
-
-#ifdef FORCE_METHOD
- } else if (level == 2 && buf != (char*)0) { /* force stored block */
-#else
- } else if (stored_len+4 <= opt_lenb && buf != (char*)0) {
- /* 4: two words for the lengths */
-#endif
- /* The test buf != NULL is only necessary if LIT_BUFSIZE > WSIZE.
- * Otherwise we can't have processed more than WSIZE input bytes since
- * the last block flush, because compression would have been
- * successful. If LIT_BUFSIZE <= WSIZE, it is never too late to
- * transform a block into a stored block.
- */
- send_bits((STORED_BLOCK<<1)+eof, 3); /* send block type */
- compressed_len = (compressed_len + 3 + 7) & ~7L;
- compressed_len += (stored_len + 4) << 3;
-
- copy_block(buf, (unsigned)stored_len, 1); /* with header */
-
-#ifdef FORCE_METHOD
- } else if (level == 3) { /* force static trees */
-#else
- } else if (static_lenb == opt_lenb) {
-#endif
- send_bits((STATIC_TREES<<1)+eof, 3);
- compress_block((ct_data near *)static_ltree, (ct_data near *)static_dtree);
- compressed_len += 3 + static_len;
- } else {
- send_bits((DYN_TREES<<1)+eof, 3);
- send_all_trees(l_desc.max_code+1, d_desc.max_code+1, max_blindex+1);
- compress_block((ct_data near *)dyn_ltree, (ct_data near *)dyn_dtree);
- compressed_len += 3 + opt_len;
- }
- Assert (compressed_len == bits_sent, "bad compressed size");
- init_block();
-
- if (eof) {
- Assert (input_len == bytes_in, "bad input size");
- bi_windup();
- compressed_len += 7; /* align on byte boundary */
- }
-
- return compressed_len >> 3;
-}
-
-/* ===========================================================================
- * Save the match info and tally the frequency counts. Return true if
- * the current block must be flushed.
- */
-int ct_tally (dist, lc)
- int dist; /* distance of matched string */
- int lc; /* match length-MIN_MATCH or unmatched char (if dist==0) */
-{
- l_buf[last_lit++] = (uch)lc;
- if (dist == 0) {
- /* lc is the unmatched char */
- dyn_ltree[lc].Freq++;
- } else {
- /* Here, lc is the match length - MIN_MATCH */
- dist--; /* dist = match distance - 1 */
- Assert((ush)dist < (ush)MAX_DIST &&
- (ush)lc <= (ush)(MAX_MATCH-MIN_MATCH) &&
- (ush)d_code(dist) < (ush)D_CODES, "ct_tally: bad match");
-
- dyn_ltree[length_code[lc]+LITERALS+1].Freq++;
- dyn_dtree[d_code(dist)].Freq++;
-
- d_buf[last_dist++] = (ush)dist;
- flags |= flag_bit;
- }
- flag_bit <<= 1;
-
- /* Output the flags if they fill a byte: */
- if ((last_lit & 7) == 0) {
- flag_buf[last_flags++] = flags;
- flags = 0, flag_bit = 1;
- }
- /* Try to guess if it is profitable to stop the current block here */
- if (level > 2 && (last_lit & 0xfff) == 0) {
- /* Compute an upper bound for the compressed length */
- ulg out_length = (ulg)last_lit*8L;
- ulg in_length = (ulg)strstart-block_start;
- int dcode;
- for (dcode = 0; dcode < D_CODES; dcode++) {
- out_length += (ulg)dyn_dtree[dcode].Freq*(5L+extra_dbits[dcode]);
- }
- out_length >>= 3;
- Trace((stderr,"\nlast_lit %u, last_dist %u, in %ld, out ~%ld(%ld%%) ",
- last_lit, last_dist, in_length, out_length,
- 100L - out_length*100L/in_length));
- if (last_dist < last_lit/2 && out_length < in_length/2) return 1;
- }
- return (last_lit == LIT_BUFSIZE-1 || last_dist == DIST_BUFSIZE);
- /* We avoid equality with LIT_BUFSIZE because of wraparound at 64K
- * on 16 bit machines and because stored blocks are restricted to
- * 64K-1 bytes.
- */
-}
-
-/* ===========================================================================
- * Send the block data compressed using the given Huffman trees
- */
-local void compress_block(ltree, dtree)
- ct_data near *ltree; /* literal tree */
- ct_data near *dtree; /* distance tree */
-{
- unsigned dist; /* distance of matched string */
- int lc; /* match length or unmatched char (if dist == 0) */
- unsigned lx = 0; /* running index in l_buf */
- unsigned dx = 0; /* running index in d_buf */
- unsigned fx = 0; /* running index in flag_buf */
- uch flag = 0; /* current flags */
- unsigned code; /* the code to send */
- int extra; /* number of extra bits to send */
-
- if (last_lit != 0) do {
- if ((lx & 7) == 0) flag = flag_buf[fx++];
- lc = l_buf[lx++];
- if ((flag & 1) == 0) {
- send_code(lc, ltree); /* send a literal byte */
- Tracecv(isgraph(lc), (stderr," '%c' ", lc));
- } else {
- /* Here, lc is the match length - MIN_MATCH */
- code = length_code[lc];
- send_code(code+LITERALS+1, ltree); /* send the length code */
- extra = extra_lbits[code];
- if (extra != 0) {
- lc -= base_length[code];
- send_bits(lc, extra); /* send the extra length bits */
- }
- dist = d_buf[dx++];
- /* Here, dist is the match distance - 1 */
- code = d_code(dist);
- Assert (code < D_CODES, "bad d_code");
-
- send_code(code, dtree); /* send the distance code */
- extra = extra_dbits[code];
- if (extra != 0) {
- dist -= base_dist[code];
- send_bits(dist, extra); /* send the extra distance bits */
- }
- } /* literal or match pair ? */
- flag >>= 1;
- } while (lx < last_lit);
-
- send_code(END_BLOCK, ltree);
-}
-
-/* ===========================================================================
- * Set the file 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).
- */
-local void set_file_type()
-{
- int n = 0;
- unsigned ascii_freq = 0;
- unsigned bin_freq = 0;
- while (n < 7) bin_freq += dyn_ltree[n++].Freq;
- while (n < 128) ascii_freq += dyn_ltree[n++].Freq;
- while (n < LITERALS) bin_freq += dyn_ltree[n++].Freq;
- *file_type = bin_freq > (ascii_freq >> 2) ? BINARY : ASCII;
- if (*file_type == BINARY && translate_eol) {
- warning ("-l used on binary file");
- }
-}
diff --git a/isys/gzlib/unzip.c b/isys/gzlib/unzip.c
deleted file mode 100644
index a672b62d0..000000000
--- a/isys/gzlib/unzip.c
+++ /dev/null
@@ -1,204 +0,0 @@
-/* unzip.c -- decompress files in gzip or pkzip format.
- * Copyright (C) 1992-1993 Jean-loup Gailly
- * This is free software; you can redistribute it and/or modify it under the
- * terms of the GNU General Public License, see the file COPYING.
- *
- * The code in this file is derived from the file funzip.c written
- * and put in the public domain by Mark Adler.
- */
-
-/*
- This version can extract files in gzip or pkzip format.
- For the latter, only the first entry is extracted, and it has to be
- either deflated or stored.
- */
-
-#ifdef RCSID
-static char rcsid[] = "$Id$";
-#endif
-
-#include <config.h>
-#include "tailor.h"
-#include "gzip.h"
-#include "crypt.h"
-
-/* PKZIP header definitions */
-#define LOCSIG 0x04034b50L /* four-byte lead-in (lsb first) */
-#define LOCFLG 6 /* offset of bit flag */
-#define CRPFLG 1 /* bit for encrypted entry */
-#define EXTFLG 8 /* bit for extended local header */
-#define LOCHOW 8 /* offset of compression method */
-#define LOCTIM 10 /* file mod time (for decryption) */
-#define LOCCRC 14 /* offset of crc */
-#define LOCSIZ 18 /* offset of compressed size */
-#define LOCLEN 22 /* offset of uncompressed length */
-#define LOCFIL 26 /* offset of file name field length */
-#define LOCEXT 28 /* offset of extra field length */
-#define LOCHDR 30 /* size of local header, including sig */
-#define EXTHDR 16 /* size of extended local header, inc sig */
-#define RAND_HEAD_LEN 12 /* length of encryption random header */
-
-
-/* Globals */
-
-int decrypt; /* flag to turn on decryption */
-char *key; /* not used--needed to link crypt.c */
-int pkzip = 0; /* set for a pkzip file */
-int ext_header = 0; /* set if extended local header */
-
-/* ===========================================================================
- * Check zip file and advance inptr to the start of the compressed data.
- * Get ofname from the local header if necessary.
- */
-int check_zipfile(in)
- int in; /* input file descriptors */
-{
- uch *h = inbuf + inptr; /* first local header */
-
- ifd = in;
-
- /* Check validity of local header, and skip name and extra fields */
- inptr += LOCHDR + SH(h + LOCFIL) + SH(h + LOCEXT);
-
- if (inptr > insize || LG(h) != LOCSIG) {
- fprintf(stderr, "\n%s: %s: not a valid zip file\n",
- progname, ifname);
- exit_code = ERROR;
- return ERROR;
- }
- method = h[LOCHOW];
- if (method != STORED && method != DEFLATED) {
- fprintf(stderr,
- "\n%s: %s: first entry not deflated or stored -- use unzip\n",
- progname, ifname);
- exit_code = ERROR;
- return ERROR;
- }
-
- /* If entry encrypted, decrypt and validate encryption header */
- if ((decrypt = h[LOCFLG] & CRPFLG) != 0) {
- fprintf(stderr, "\n%s: %s: encrypted file -- use unzip\n",
- progname, ifname);
- exit_code = ERROR;
- return ERROR;
- }
-
- /* Save flags for unzip() */
- ext_header = (h[LOCFLG] & EXTFLG) != 0;
- pkzip = 1;
-
- /* Get ofname and time stamp from local header (to be done) */
- return OK;
-}
-
-/* ===========================================================================
- * Unzip in to out. This routine works on both gzip and pkzip files.
- *
- * IN assertions: the buffer inbuf contains already the beginning of
- * the compressed data, from offsets inptr to insize-1 included.
- * The magic header has already been checked. The output buffer is cleared.
- */
-int unzip(in, out)
- int in, out; /* input and output file descriptors */
-{
- ulg orig_crc = 0; /* original crc */
- ulg orig_len = 0; /* original uncompressed length */
- int n;
- uch buf[EXTHDR]; /* extended local header */
- int err = OK;
-
- ifd = in;
- ofd = out;
-
- updcrc(NULL, 0); /* initialize crc */
-
- if (pkzip && !ext_header) { /* crc and length at the end otherwise */
- orig_crc = LG(inbuf + LOCCRC);
- orig_len = LG(inbuf + LOCLEN);
- }
-
- /* Decompress */
- if (method == DEFLATED) {
-
- int res = inflate();
-
- if (res == 3) {
- gzerror("out of memory");
- } else if (res != 0) {
- gzerror("invalid compressed data--format violated");
- }
-
- } else if (pkzip && method == STORED) {
-
- register ulg n = LG(inbuf + LOCLEN);
-
- if (n != LG(inbuf + LOCSIZ) - (decrypt ? RAND_HEAD_LEN : 0)) {
-
- fprintf(stderr, "len %ld, siz %ld\n", n, LG(inbuf + LOCSIZ));
- gzerror("invalid compressed data--length mismatch");
- }
- while (n--) {
- uch c = (uch)get_byte();
- put_ubyte(c);
- }
- flush_window();
- } else {
- gzerror("internal error, invalid method");
- }
-
- /* Get the crc and original length */
- if (!pkzip) {
- /* crc32 (see algorithm.doc)
- * uncompressed input size modulo 2^32
- */
- for (n = 0; n < 8; n++) {
- buf[n] = (uch)get_byte(); /* may cause an error if EOF */
- }
- orig_crc = LG(buf);
- orig_len = LG(buf+4);
-
- } else if (ext_header) { /* If extended header, check it */
- /* signature - 4bytes: 0x50 0x4b 0x07 0x08
- * CRC-32 value
- * compressed size 4-bytes
- * uncompressed size 4-bytes
- */
- for (n = 0; n < EXTHDR; n++) {
- buf[n] = (uch)get_byte(); /* may cause an error if EOF */
- }
- orig_crc = LG(buf+4);
- orig_len = LG(buf+12);
- }
-
- /* Validate decompression */
- if (orig_crc != updcrc(outbuf, 0)) {
- fprintf(stderr, "\n%s: %s: invalid compressed data--crc error\n",
- progname, ifname);
- err = ERROR;
- }
- if (orig_len != (ulg)(bytes_out & 0xffffffff)) {
- fprintf(stderr, "\n%s: %s: invalid compressed data--length error\n",
- progname, ifname);
- err = ERROR;
- }
-
- /* Check if there are more entries in a pkzip file */
- if (pkzip && inptr + 4 < insize && LG(inbuf+inptr) == LOCSIG) {
- if (to_stdout) {
- WARN((stderr,
- "%s: %s has more than one entry--rest ignored\n",
- progname, ifname));
- } else {
- /* Don't destroy the input zip file */
- fprintf(stderr,
- "%s: %s has more than one entry -- unchanged\n",
- progname, ifname);
- err = ERROR;
- }
- }
- ext_header = pkzip = 0; /* for next file */
- if (err == OK) return OK;
- exit_code = ERROR;
- if (!test) abort_gzip();
- return err;
-}
diff --git a/isys/gzlib/util.c b/isys/gzlib/util.c
deleted file mode 100644
index 873721a24..000000000
--- a/isys/gzlib/util.c
+++ /dev/null
@@ -1,293 +0,0 @@
-/* util.c -- utility functions for gzip support
- * Copyright (C) 1992-1993 Jean-loup Gailly
- * This is free software; you can redistribute it and/or modify it under the
- * terms of the GNU General Public License, see the file COPYING.
- */
-
-#ifdef RCSID
-static char rcsid[] = "$Id$";
-#endif
-
-#include <config.h>
-#include <ctype.h>
-#include <errno.h>
-
-#include "tailor.h"
-
-#ifdef HAVE_LIMITS_H
-# include <limits.h>
-#endif
-#ifdef HAVE_UNISTD_H
-# include <unistd.h>
-#endif
-#ifdef HAVE_FCNTL_H
-# include <fcntl.h>
-#endif
-
-#if defined STDC_HEADERS || defined HAVE_STDLIB_H
-# include <stdlib.h>
-#endif
-
-#include "gzip.h"
-#include "crypt.h"
-
-#ifndef CHAR_BIT
-# define CHAR_BIT 8
-#endif
-
-extern ulg crc_32_tab[]; /* crc table, defined below */
-
-/* ===========================================================================
- * Copy input to output unchanged: zcat == cat with --force.
- * IN assertion: insize bytes have already been read in inbuf.
- */
-int copy(in, out)
- int in, out; /* input and output file descriptors */
-{
- errno = 0;
- while (insize != 0 && (int)insize != -1) {
- write_buf(out, (char*)inbuf, insize);
- bytes_out += insize;
- insize = read(in, (char*)inbuf, INBUFSIZ);
- }
- if ((int)insize == -1) {
- read_error();
- }
- bytes_in = bytes_out;
- return OK;
-}
-
-/* ===========================================================================
- * Run a set of bytes through the crc shift register. If s is a NULL
- * pointer, then initialize the crc shift register contents instead.
- * Return the current crc in either case.
- */
-ulg updcrc(s, n)
- uch *s; /* pointer to bytes to pump through */
- unsigned n; /* number of bytes in s[] */
-{
- register ulg c; /* temporary variable */
-
- static ulg crc = (ulg)0xffffffffL; /* shift register contents */
-
- if (s == NULL) {
- c = 0xffffffffL;
- } else {
- c = crc;
- if (n) do {
- c = crc_32_tab[((int)c ^ (*s++)) & 0xff] ^ (c >> 8);
- } while (--n);
- }
- crc = c;
- return c ^ 0xffffffffL; /* (instead of ~c for 64-bit machines) */
-}
-
-/* ===========================================================================
- * Clear input and output buffers
- */
-void clear_bufs()
-{
- outcnt = 0;
- insize = inptr = 0;
- bytes_in = bytes_out = 0L;
-}
-
-/* ===========================================================================
- * Fill the input buffer. This is called only when the buffer is empty.
- */
-int fill_inbuf(eof_ok)
- int eof_ok; /* set if EOF acceptable as a result */
-{
- int len;
-
- /* Read as much as possible */
- insize = 0;
- do {
- len = read(ifd, (char*)inbuf+insize, INBUFSIZ-insize);
- if (len == 0) break;
- if (len == -1) {
- read_error();
- break;
- }
- insize += len;
- } while (insize < INBUFSIZ);
-
- if (insize == 0) {
- if (eof_ok) return EOF;
- flush_window();
- errno = 0;
- read_error();
- }
- bytes_in += (off_t)insize;
- inptr = 1;
- return inbuf[0];
-}
-
-/* ===========================================================================
- * Write the output buffer outbuf[0..outcnt-1] and update bytes_out.
- * (used for the compressed data only)
- */
-void flush_outbuf()
-{
- if (outcnt == 0) return;
-
- write_buf(ofd, (char *)outbuf, outcnt);
- bytes_out += (off_t)outcnt;
- outcnt = 0;
-}
-
-/* ===========================================================================
- * Write the output window window[0..outcnt-1] and update crc and bytes_out.
- * (Used for the decompressed data only.)
- */
-void flush_window()
-{
- if (outcnt == 0) return;
- updcrc(window, outcnt);
-
- if (!test) {
- write_buf(ofd, (char *)window, outcnt);
- }
- bytes_out += (off_t)outcnt;
- outcnt = 0;
-}
-
-/* ===========================================================================
- * Does the same as write(), but also handles partial pipe writes and checks
- * for error return.
- */
-void write_buf(fd, buf, cnt)
- int fd;
- voidp buf;
- unsigned cnt;
-{
- unsigned n;
-
- while ((n = write(fd, buf, cnt)) != cnt) {
- if (n == (unsigned)(-1)) {
- write_error();
- }
- cnt -= n;
- buf = (voidp)((char*)buf+n);
- }
-}
-
-/* ========================================================================
- * Put string s in lower case, return s.
- */
-char *strlwr(s)
- char *s;
-{
- char *t;
- for (t = s; *t; t++)
- *t = tolow ((unsigned char) *t);
- return s;
-}
-
-/* ========================================================================
- * Error handlers.
- */
-void gzerror(m)
- char *m;
-{
- fprintf(stderr, "\n%s: %s: %s\n", progname, ifname, m);
- abort_gzip();
-}
-
-void warning (m)
- char *m;
-{
- WARN ((stderr, "%s: %s: warning: %s\n", progname, ifname, m));
-}
-
-void read_error()
-{
- int e = errno;
- fprintf(stderr, "\n%s: ", progname);
- if (e != 0) {
- errno = e;
- perror(ifname);
- } else {
- fprintf(stderr, "%s: unexpected end of file\n", ifname);
- }
- abort_gzip();
-}
-
-void write_error()
-{
- int e = errno;
- fprintf(stderr, "\n%s: ", progname);
- errno = e;
- perror(ofname);
- abort_gzip();
-}
-
-/* ========================================================================
- * Semi-safe malloc -- never returns NULL.
- */
-voidp gzxmalloc (size)
- unsigned size;
-{
- voidp cp = (voidp)malloc (size);
-
- if (cp == NULL) gzerror("out of memory");
- return cp;
-}
-
-/* ========================================================================
- * Table of CRC-32's of all single-byte values (made by makecrc.c)
- */
-ulg crc_32_tab[] = {
- 0x00000000L, 0x77073096L, 0xee0e612cL, 0x990951baL, 0x076dc419L,
- 0x706af48fL, 0xe963a535L, 0x9e6495a3L, 0x0edb8832L, 0x79dcb8a4L,
- 0xe0d5e91eL, 0x97d2d988L, 0x09b64c2bL, 0x7eb17cbdL, 0xe7b82d07L,
- 0x90bf1d91L, 0x1db71064L, 0x6ab020f2L, 0xf3b97148L, 0x84be41deL,
- 0x1adad47dL, 0x6ddde4ebL, 0xf4d4b551L, 0x83d385c7L, 0x136c9856L,
- 0x646ba8c0L, 0xfd62f97aL, 0x8a65c9ecL, 0x14015c4fL, 0x63066cd9L,
- 0xfa0f3d63L, 0x8d080df5L, 0x3b6e20c8L, 0x4c69105eL, 0xd56041e4L,
- 0xa2677172L, 0x3c03e4d1L, 0x4b04d447L, 0xd20d85fdL, 0xa50ab56bL,
- 0x35b5a8faL, 0x42b2986cL, 0xdbbbc9d6L, 0xacbcf940L, 0x32d86ce3L,
- 0x45df5c75L, 0xdcd60dcfL, 0xabd13d59L, 0x26d930acL, 0x51de003aL,
- 0xc8d75180L, 0xbfd06116L, 0x21b4f4b5L, 0x56b3c423L, 0xcfba9599L,
- 0xb8bda50fL, 0x2802b89eL, 0x5f058808L, 0xc60cd9b2L, 0xb10be924L,
- 0x2f6f7c87L, 0x58684c11L, 0xc1611dabL, 0xb6662d3dL, 0x76dc4190L,
- 0x01db7106L, 0x98d220bcL, 0xefd5102aL, 0x71b18589L, 0x06b6b51fL,
- 0x9fbfe4a5L, 0xe8b8d433L, 0x7807c9a2L, 0x0f00f934L, 0x9609a88eL,
- 0xe10e9818L, 0x7f6a0dbbL, 0x086d3d2dL, 0x91646c97L, 0xe6635c01L,
- 0x6b6b51f4L, 0x1c6c6162L, 0x856530d8L, 0xf262004eL, 0x6c0695edL,
- 0x1b01a57bL, 0x8208f4c1L, 0xf50fc457L, 0x65b0d9c6L, 0x12b7e950L,
- 0x8bbeb8eaL, 0xfcb9887cL, 0x62dd1ddfL, 0x15da2d49L, 0x8cd37cf3L,
- 0xfbd44c65L, 0x4db26158L, 0x3ab551ceL, 0xa3bc0074L, 0xd4bb30e2L,
- 0x4adfa541L, 0x3dd895d7L, 0xa4d1c46dL, 0xd3d6f4fbL, 0x4369e96aL,
- 0x346ed9fcL, 0xad678846L, 0xda60b8d0L, 0x44042d73L, 0x33031de5L,
- 0xaa0a4c5fL, 0xdd0d7cc9L, 0x5005713cL, 0x270241aaL, 0xbe0b1010L,
- 0xc90c2086L, 0x5768b525L, 0x206f85b3L, 0xb966d409L, 0xce61e49fL,
- 0x5edef90eL, 0x29d9c998L, 0xb0d09822L, 0xc7d7a8b4L, 0x59b33d17L,
- 0x2eb40d81L, 0xb7bd5c3bL, 0xc0ba6cadL, 0xedb88320L, 0x9abfb3b6L,
- 0x03b6e20cL, 0x74b1d29aL, 0xead54739L, 0x9dd277afL, 0x04db2615L,
- 0x73dc1683L, 0xe3630b12L, 0x94643b84L, 0x0d6d6a3eL, 0x7a6a5aa8L,
- 0xe40ecf0bL, 0x9309ff9dL, 0x0a00ae27L, 0x7d079eb1L, 0xf00f9344L,
- 0x8708a3d2L, 0x1e01f268L, 0x6906c2feL, 0xf762575dL, 0x806567cbL,
- 0x196c3671L, 0x6e6b06e7L, 0xfed41b76L, 0x89d32be0L, 0x10da7a5aL,
- 0x67dd4accL, 0xf9b9df6fL, 0x8ebeeff9L, 0x17b7be43L, 0x60b08ed5L,
- 0xd6d6a3e8L, 0xa1d1937eL, 0x38d8c2c4L, 0x4fdff252L, 0xd1bb67f1L,
- 0xa6bc5767L, 0x3fb506ddL, 0x48b2364bL, 0xd80d2bdaL, 0xaf0a1b4cL,
- 0x36034af6L, 0x41047a60L, 0xdf60efc3L, 0xa867df55L, 0x316e8eefL,
- 0x4669be79L, 0xcb61b38cL, 0xbc66831aL, 0x256fd2a0L, 0x5268e236L,
- 0xcc0c7795L, 0xbb0b4703L, 0x220216b9L, 0x5505262fL, 0xc5ba3bbeL,
- 0xb2bd0b28L, 0x2bb45a92L, 0x5cb36a04L, 0xc2d7ffa7L, 0xb5d0cf31L,
- 0x2cd99e8bL, 0x5bdeae1dL, 0x9b64c2b0L, 0xec63f226L, 0x756aa39cL,
- 0x026d930aL, 0x9c0906a9L, 0xeb0e363fL, 0x72076785L, 0x05005713L,
- 0x95bf4a82L, 0xe2b87a14L, 0x7bb12baeL, 0x0cb61b38L, 0x92d28e9bL,
- 0xe5d5be0dL, 0x7cdcefb7L, 0x0bdbdf21L, 0x86d3d2d4L, 0xf1d4e242L,
- 0x68ddb3f8L, 0x1fda836eL, 0x81be16cdL, 0xf6b9265bL, 0x6fb077e1L,
- 0x18b74777L, 0x88085ae6L, 0xff0f6a70L, 0x66063bcaL, 0x11010b5cL,
- 0x8f659effL, 0xf862ae69L, 0x616bffd3L, 0x166ccf45L, 0xa00ae278L,
- 0xd70dd2eeL, 0x4e048354L, 0x3903b3c2L, 0xa7672661L, 0xd06016f7L,
- 0x4969474dL, 0x3e6e77dbL, 0xaed16a4aL, 0xd9d65adcL, 0x40df0b66L,
- 0x37d83bf0L, 0xa9bcae53L, 0xdebb9ec5L, 0x47b2cf7fL, 0x30b5ffe9L,
- 0xbdbdf21cL, 0xcabac28aL, 0x53b39330L, 0x24b4a3a6L, 0xbad03605L,
- 0xcdd70693L, 0x54de5729L, 0x23d967bfL, 0xb3667a2eL, 0xc4614ab8L,
- 0x5d681b02L, 0x2a6f2b94L, 0xb40bbe37L, 0xc30c8ea1L, 0x5a05df1bL,
- 0x2d02ef8dL
-};
diff --git a/isys/gzlib/zip.c b/isys/gzlib/zip.c
deleted file mode 100644
index ad3379dac..000000000
--- a/isys/gzlib/zip.c
+++ /dev/null
@@ -1,112 +0,0 @@
-/* zip.c -- compress files to the gzip or pkzip format
- * Copyright (C) 1992-1993 Jean-loup Gailly
- * This is free software; you can redistribute it and/or modify it under the
- * terms of the GNU General Public License, see the file COPYING.
- */
-
-#ifdef RCSID
-static char rcsid[] = "$Id$";
-#endif
-
-#include <config.h>
-#include <ctype.h>
-
-#include "tailor.h"
-#include "gzip.h"
-#include "crypt.h"
-
-#ifdef HAVE_UNISTD_H
-# include <unistd.h>
-#endif
-#ifdef HAVE_FCNTL_H
-# include <fcntl.h>
-#endif
-
-local ulg crc; /* crc on uncompressed file data */
-off_t header_bytes; /* number of bytes in gzip header */
-
-/* ===========================================================================
- * Deflate in to out.
- * IN assertions: the input and output buffers are cleared.
- * The variables time_stamp and save_orig_name are initialized.
- */
-int zip(in, out)
- int in, out; /* input and output file descriptors */
-{
- uch flags = 0; /* general purpose bit flags */
- ush attr = 0; /* ascii/binary flag */
- ush deflate_flags = 0; /* pkzip -es, -en or -ex equivalent */
-
- ifd = in;
- ofd = out;
- outcnt = 0;
-
- /* Write the header to the gzip file. See algorithm.doc for the format */
-
- method = DEFLATED;
- put_byte(GZIP_MAGIC[0]); /* magic header */
- put_byte(GZIP_MAGIC[1]);
- put_byte(DEFLATED); /* compression method */
-
- put_byte(flags); /* general flags */
- put_long(time_stamp == (time_stamp & 0xffffffff)
- ? (ulg)time_stamp : (ulg)0);
-
- /* Write deflated file to zip file */
- crc = updcrc(0, 0);
-
- bi_init(out);
- ct_init(&attr, &method);
- lm_init(level, &deflate_flags);
-
- put_byte((uch)deflate_flags); /* extra flags */
- put_byte(OS_CODE); /* OS identifier */
-
- header_bytes = (off_t)outcnt;
-
- (void)deflate();
-
-#if !defined(NO_SIZE_CHECK) && !defined(RECORD_IO)
- /* Check input size (but not in VMS -- variable record lengths mess it up)
- * and not on MSDOS -- diet in TSR mode reports an incorrect file size)
- */
- if (ifile_size != -1L && bytes_in != ifile_size) {
- fprintf(stderr, "%s: %s: file size changed while zipping\n",
- progname, ifname);
- }
-#endif
-
- /* Write the crc and uncompressed size */
- put_long(crc);
- put_long((ulg)bytes_in);
- header_bytes += 2*sizeof(long);
-
- flush_outbuf();
- return OK;
-}
-
-
-/* ===========================================================================
- * Read a new buffer from the current input file, perform end-of-line
- * translation, and update the crc and input file size.
- * IN assertion: size >= 2 (for end-of-line translation)
- */
-int file_read(buf, size)
- char *buf;
- unsigned size;
-{
- unsigned len;
-
- Assert(insize == 0, "inbuf not empty");
-
- len = read(ifd, buf, size);
- if (len == 0) return (int)len;
- if (len == (unsigned)-1) {
- read_error();
- return EOF;
- }
-
- crc = updcrc((uch*)buf, len);
- bytes_in += (off_t)len;
- return (int)len;
-}
generated by cgit (git 2.34.1) at 2024-11-14 11:13:37 +0000