diff options
Diffstat (limited to 'archival')
| -rw-r--r-- | archival/gzip.c | 1322 |
1 files changed, 193 insertions, 1129 deletions
diff --git a/archival/gzip.c b/archival/gzip.c index c4c592729..cdf226889 100644 --- a/archival/gzip.c +++ b/archival/gzip.c @@ -35,14 +35,20 @@ #define SMALL_MEM #define DYN_ALLOC -/* I don't like nested includes, but the string and io functions are used - * too often - */ #include <stdlib.h> #include <stdio.h> #include <string.h> #include <unistd.h> #include <errno.h> +#include <sys/types.h> +#include <signal.h> +#include <utime.h> +#include <ctype.h> +#include <sys/types.h> +#include <unistd.h> +#include <dirent.h> +#include <fcntl.h> +#include <time.h> #include "busybox.h" #define memzero(s, n) memset ((void *)(s), 0, (n)) @@ -51,8 +57,6 @@ # define RETSIGTYPE void #endif -#define local static - typedef unsigned char uch; typedef unsigned short ush; typedef unsigned long ulg; @@ -63,22 +67,16 @@ typedef unsigned long ulg; #define WARNING 2 /* Compression methods (see algorithm.doc) */ +/* Only STORED and DEFLATED are supported by this BusyBox module */ #define STORED 0 -#define COMPRESSED 1 -#define PACKED 2 -#define LZHED 3 /* methods 4 to 7 reserved */ #define DEFLATED 8 -#define MAX_METHODS 9 static 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. */ @@ -110,56 +108,27 @@ static int method; /* compression method */ #endif #ifdef DYN_ALLOC -# define EXTERN(type, array) extern type * array -# define DECLARE(type, array, size) type * array +# define DECLARE(type, array, size) static type * array # define ALLOC(type, array, size) { \ array = (type*)calloc((size_t)(((size)+1L)/2), 2*sizeof(type)); \ if (array == NULL) error_msg(memory_exhausted); \ } # define FREE(array) {if (array != NULL) free(array), array=NULL;} #else -# define EXTERN(type, array) extern type array[] -# define DECLARE(type, array, size) type array[size] +# define DECLARE(type, array, size) static 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 +#define tab_prefix prev /* hash link (see deflate.c) */ +#define head (prev+WSIZE) /* hash head (see deflate.c) */ -extern unsigned insize; /* valid bytes in inbuf */ -static unsigned inptr; /* index of next byte to be processed in inbuf */ -extern unsigned outcnt; /* bytes in output buffer */ - -extern long bytes_in; /* number of input bytes */ -extern long bytes_out; /* number of output bytes */ -extern long header_bytes; /* number of bytes in gzip header */ +static long bytes_in; /* number of input bytes */ #define isize bytes_in /* for compatibility with old zip sources (to be cleaned) */ -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 long time_stamp; /* original time stamp (modification time) */ -extern long 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 */ @@ -177,7 +146,6 @@ typedef int file_t; /* Do not use stdio */ #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 */ @@ -203,25 +171,9 @@ typedef int file_t; /* Do not use stdio */ * 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 test; /* check .z file integrity */ -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). - */ +/* put_byte is used for the compressed output */ #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) \ @@ -243,12 +195,6 @@ extern int save_orig_name; /* set if original name must be saved */ #define seekable() 0 /* force sequential output */ #define translate_eol 0 /* no option -a yet */ -#define tolow(c) (isupper(c) ? (c)-'A'+'a' : (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)) error_msg(msg);} @@ -269,56 +215,38 @@ extern int save_orig_name; /* set if original name must be saved */ #define WARN(msg) {if (!quiet) fprintf msg ; \ if (exit_code == OK) exit_code = WARNING;} +#ifndef MAX_PATH_LEN +# define MAX_PATH_LEN 1024 /* max pathname length */ +#endif + + - /* in zip.c: */ -extern int zip (int in, int out); -extern int file_read (char *buf, unsigned size); - - /* in unzip.c */ -extern int check_zipfile (int in); - - /* in unpack.c */ -extern int unpack (int in, int out); - - /* in unlzh.c */ -extern int unlzh (int in, int out); - - /* in gzip.c */ -RETSIGTYPE abort_gzip (void); - - /* in deflate.c */ -void lm_init (ush * flags); -ulg deflate (void); - - /* in trees.c */ -void ct_init (ush * attr, int *methodp); -int ct_tally (int dist, int lc); -ulg flush_block (char *buf, ulg stored_len, int eof); - - /* in bits.c */ -void bi_init (file_t zipfile); -void send_bits (int value, int length); -unsigned bi_reverse (unsigned value, int length); -void bi_windup (void); -void copy_block (char *buf, unsigned len, int header); -extern int (*read_buf) (char *buf, unsigned size); - - /* in util.c: */ -extern int copy (int in, int out); -//extern ulg updcrc (uch * s, unsigned n); -//extern void clear_bufs (void); -extern int fill_inbuf (int eof_ok); -extern void flush_outbuf (void); -extern void flush_window (void); -//extern void write_buf (int fd, void * buf, unsigned cnt); -extern char *strlwr (char *s); -extern char *add_envopt (int *argcp, char ***argvp, char *env); -//extern void read_error_msg (void); -//extern void write_error_msg (void); -extern void display_ratio (long num, long den, FILE * file); - - /* in inflate.c */ -extern int inflate (void); + /* from zip.c: */ +static int zip (int in, int out); +static int file_read (char *buf, unsigned size); + + /* from gzip.c */ +static RETSIGTYPE abort_gzip (void); + + /* from deflate.c */ +static void lm_init (ush * flags); +static ulg deflate (void); + + /* from trees.c */ +static void ct_init (ush * attr, int *methodp); +static int ct_tally (int dist, int lc); +static ulg flush_block (char *buf, ulg stored_len, int eof); + + /* from bits.c */ +static void bi_init (file_t zipfile); +static void send_bits (int value, int length); +static unsigned bi_reverse (unsigned value, int length); +static void bi_windup (void); +static void copy_block (char *buf, unsigned len, int header); +static int (*read_buf) (char *buf, unsigned size); + + /* from util.c: */ +static void flush_outbuf (void); /* lzw.h -- define the lzw functions. * Copyright (C) 1992-1993 Jean-loup Gailly. @@ -345,34 +273,6 @@ extern int inflate (void); * "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 */ - -/* revision.h -- define the version number - * 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. - */ - -#define VERSION "1.2.4" -#define PATCHLEVEL 0 -#define REVDATE "18 Aug 93" - -/* This version does not support compression into old compress format: */ -#ifdef LZW -# undef LZW -#endif - /* 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 @@ -384,259 +284,6 @@ extern int block_mode; /* block compress mode -C compatible with 2.0 */ */ -#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 DIRENT, since <unistd.h> defines POSIX_SOURCE which - * implies DIRENT. - */ -# define near -# else -# define MAXSEG_64K -# ifdef __TURBOC__ -# define NO_OFF_T -# ifdef __BORLANDC__ -# define DIRENT -# else -# define NO_UTIME -# endif -# else /* MSC */ -# define HAVE_SYS_UTIME_H -# define NO_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 NO_CHOWN -# define PROTO -# define STDC_HEADERS -# define NO_SIZE_CHECK -# 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 NO_CHOWN -# define PROTO -# define STDC_HEADERS -# 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 NO_UTIME_H -# define MAXSEG_64K -# undef near -# define near _near -# endif -# ifdef __EMX__ -# define HAVE_SYS_UTIME_H -# define NO_UTIME_H -# define DIRENT -# define EXPAND(argc,argv) \ - {_response(&argc, &argv); _wildcard(&argc, &argv);} -# endif -# ifdef __BORLANDC__ -# define DIRENT -# endif -# ifdef __ZTC__ -# define NO_DIR -# define NO_UTIME_H -# include <dos.h> -# define EXPAND(argc,argv) \ - {response_expand(&argc, &argv);} -# endif -#endif - -#ifdef WIN32 /* Windows NT */ -# define HAVE_SYS_UTIME_H -# define NO_UTIME_H -# define PATH_SEP2 '\\' -# define PATH_SEP3 ':' -# define MAX_PATH_LEN 260 -# define NO_CHOWN -# define PROTO -# define STDC_HEADERS -# define SET_BINARY_MODE(fd) setmode(fd, O_BINARY) -# 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 NO_UTIME -# define EXPAND(argc,argv) vms_expand_args(&argc,&argv); -# include <file.h> -# define unlink delete -# ifdef VAXC -# define NO_FCNTL_H -# include <unixio.h> -# endif -#endif - -#ifdef AMIGA -# define PATH_SEP2 ':' -# define STDC_HEADERS -# define OS_CODE 0x01 -# define ASMV -# ifdef __GNUC__ -# define DIRENT -# define HAVE_UNISTD_H -# else /* SASC */ -# define NO_STDIN_FSTAT -# define SYSDIR -# define NO_SYMLINK -# define NO_CHOWN -# define NO_FCNTL_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 DIRENT -# 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 NO_CHOWN -# define casemap(c) tolow(c) /* Force file names to lower case */ -# define NO_SYMLINK -# endif -#endif - -#ifdef MACOS -# define PATH_SEP ':' -# define DYN_ALLOC -# define PROTO -# define NO_STDIN_FSTAT -# define NO_CHOWN -# define NO_UTIME -# 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_MEMORY_H -# define NO_UTIME_H -# define NO_UTIME -# define NO_CHOWN -# define NO_STDIN_FSTAT -# define NO_SIZE_CHECK -# define NO_SYMLINK -# 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 @@ -647,10 +294,6 @@ extern void _expand_args(int *argc, char ***argv); # define PATH_SEP '/' #endif -#ifndef casemap -# define casemap(c) (c) -#endif - #ifndef OPTIONS_VAR # define OPTIONS_VAR "GZIP" #endif @@ -665,49 +308,36 @@ extern void _expand_args(int *argc, char ***argv); # 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 + /* global buffers */ -#ifndef OPEN -# define OPEN(name, flags, mode) open(name, flags, mode) -#endif +DECLARE(uch, inbuf, INBUFSIZ + INBUF_EXTRA); +DECLARE(uch, outbuf, OUTBUFSIZ + OUTBUF_EXTRA); +DECLARE(ush, d_buf, DIST_BUFSIZE); +DECLARE(uch, window, 2L * WSIZE); +DECLARE(ush, tab_prefix, 1L << BITS); -#ifndef get_char -# define get_char() get_byte() -#endif +static int crc_table_empty = 1; -#ifndef put_char -# define put_char(c) put_byte(c) -#endif +static int foreground; /* set if program run in foreground */ +static int method = DEFLATED; /* compression method */ +static int exit_code = OK; /* program exit code */ +static int part_nb; /* number of parts in .gz file */ +static long time_stamp; /* original time stamp (modification time) */ +static long ifile_size; /* input file size, -1 for devices (debug only) */ +static char z_suffix[MAX_SUFFIX + 1]; /* default suffix (can be set with --suffix) */ +static int z_len; /* strlen(z_suffix) */ -int crc_table_empty = 1; +static char ifname[MAX_PATH_LEN]; /* input file name */ +static char ofname[MAX_PATH_LEN]; /* output file name */ +static int ifd; /* input file descriptor */ +static int ofd; /* output file descriptor */ +static unsigned insize; /* valid bytes in inbuf */ +static unsigned outcnt; /* bytes in output buffer */ /* ======================================================================== * Signal and error handler. */ -void abort_gzip() +static void abort_gzip() { exit(ERROR); } @@ -718,8 +348,8 @@ void abort_gzip() static void clear_bufs(void) { outcnt = 0; - insize = inptr = 0; - bytes_in = bytes_out = 0L; + insize = 0; + bytes_in = 0L; } static void write_error_msg() @@ -733,10 +363,7 @@ static void write_error_msg() * Does the same as write(), but also handles partial pipe writes and checks * for error return. */ -static void write_buf(fd, buf, cnt) -int fd; -void * buf; -unsigned cnt; +static void write_buf(int fd, void *buf, unsigned cnt) { unsigned n; @@ -749,43 +376,26 @@ unsigned cnt; } } -/* ======================================================================== - * Error handlers. - */ -static void read_error_msg() -{ - fprintf(stderr, "\n"); - if (errno != 0) { - perror(""); - } else { - fprintf(stderr, "unexpected end of file\n"); - } - abort_gzip(); -} - /* =========================================================================== * 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. */ -static ulg updcrc(s, n) -uch *s; /* pointer to bytes to pump through */ -unsigned n; /* number of bytes in s[] */ +static ulg updcrc(uch *s, unsigned n) { static ulg crc = (ulg) 0xffffffffL; /* shift register contents */ register ulg c; /* temporary variable */ static unsigned long crc_32_tab[256]; if (crc_table_empty) { unsigned long csr; /* crc shift register */ - unsigned long e; /* polynomial exclusive-or pattern */ + unsigned long e=0; /* polynomial exclusive-or pattern */ int i; /* counter for all possible eight bit values */ int k; /* byte being shifted into crc apparatus */ /* terms of polynomial defining this crc (except x^32): */ - static int p[] = {0,1,2,4,5,7,8,10,11,12,16,22,23,26}; + static const int p[] = {0,1,2,4,5,7,8,10,11,12,16,22,23,26}; /* Make exclusive-or pattern from polynomial (0xedb88320) */ - e = 0; for (i = 0; i < sizeof(p)/sizeof(int); i++) e |= 1L << (31 - p[i]); @@ -868,17 +478,13 @@ unsigned n; /* number of bytes in s[] */ * */ -#ifdef DEBUG -# include <stdio.h> -#endif - /* =========================================================================== * Local data used by the "bit string" routines. */ -local file_t zfile; /* output gzip file */ +static file_t zfile; /* output gzip file */ -local unsigned short bi_buf; +static unsigned short bi_buf; /* Output buffer. bits are inserted starting at the bottom (least significant * bits). @@ -889,13 +495,7 @@ local unsigned short bi_buf; * 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) (char *buf, unsigned size); +static int bi_valid; /* Current input function. Set to mem_read for in-memory compression */ @@ -906,8 +506,7 @@ ulg bits_sent; /* bit length of the compressed data */ /* =========================================================================== * Initialize the bit string routines. */ -void bi_init(zipfile) -file_t zipfile; /* output zip file, NO_FILE for in-memory compression */ +static void bi_init(file_t zipfile) { zfile = zipfile; bi_buf = 0; @@ -928,9 +527,7 @@ file_t zipfile; /* output zip file, NO_FILE for in-memory compression */ * 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 */ +static void send_bits(int value, int length) { #ifdef DEBUG Tracev((stderr, " l %2d v %4x ", length, value)); @@ -957,9 +554,7 @@ int length; /* number of bits */ * 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 */ +static unsigned bi_reverse(unsigned code, int len) { register unsigned res = 0; @@ -973,7 +568,7 @@ int len; /* its bit length */ /* =========================================================================== * Write out any remaining bits in an incomplete byte. */ -void bi_windup() +static void bi_windup() { if (bi_valid > 8) { put_short(bi_buf); @@ -991,10 +586,7 @@ void bi_windup() * 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 */ +static void copy_block(char *buf, unsigned len, int header) { bi_windup(); /* align on byte boundary */ @@ -1009,12 +601,6 @@ int header; /* true if block header must be written */ bits_sent += (ulg) len << 3; #endif while (len--) { -#ifdef CRYPT - int t; - - if (key) - zencode(*buf, t); -#endif put_byte(*buf++); } } @@ -1082,7 +668,6 @@ int header; /* true if block header must be written */ * attributes. */ -#include <stdio.h> /* =========================================================================== * Configuration parameters @@ -1111,10 +696,10 @@ int header; /* true if block header must be written */ * 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 +# 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 +# error cannot overlay head with tab_prefix1 #endif #define HASH_SIZE (unsigned)(1<<HASH_BITS) #define HASH_MASK (HASH_SIZE-1) @@ -1159,19 +744,19 @@ typedef unsigned IPos; /* DECLARE(Pos, head, 1<<HASH_BITS); */ /* Heads of the hash chains or NIL. */ -ulg window_size = (ulg) 2 * WSIZE; +static const 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; +static 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 */ +static 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 @@ -1180,24 +765,24 @@ local unsigned ins_h; /* hash index of string to be inserted */ * H_SHIFT * MIN_MATCH >= HASH_BITS */ -unsigned int near prev_length; +static unsigned int 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 */ +static unsigned strstart; /* start of string to insert */ +static unsigned match_start; /* start of matching string */ +static int eofile; /* flag set at end of input file */ +static unsigned lookahead; /* number of valid bytes ahead in window */ -unsigned near max_chain_length; +static const unsigned max_chain_length=4096; /* 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; +static const unsigned int max_lazy_match=258; /* Attempt to find a better match only when the current match is strictly * smaller than this value. This mechanism is used only for compression @@ -1209,7 +794,7 @@ local unsigned int max_lazy_match; * max_insert_length is used only for compression levels <= 3. */ -unsigned near good_match; +static const unsigned good_match=32; /* Use a faster search when the previous match is longer than this */ @@ -1220,22 +805,7 @@ unsigned near good_match; * 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 = - /* 9 */ { 32, 258, 258, 4096 }; - /* maximum compression */ +static const int nice_match=258; /* Stop searching when current match exceeds this */ /* 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 @@ -1248,16 +818,12 @@ local config configuration_table = /* =========================================================================== * Prototypes for local functions. */ -local void fill_window (void); - -int longest_match (IPos cur_match); +static void fill_window (void); -#ifdef ASMV -void match_init (void); /* asm code initialization */ -#endif +static int longest_match (IPos cur_match); #ifdef DEBUG -local void check_match (IPos start, IPos match, int length); +static void check_match (IPos start, IPos match, int length); #endif /* =========================================================================== @@ -1284,36 +850,19 @@ local void check_match (IPos start, IPos match, int length); /* =========================================================================== * Initialize the "longest match" routines for a new file */ -void lm_init(flags) -ush *flags; /* general purpose bit flag */ +static void lm_init(ush *flags) { register unsigned j; /* 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.max_lazy; - good_match = configuration_table.good_length; -#ifndef FULL_SEARCH - nice_match = configuration_table.nice_length; -#endif - max_chain_length = configuration_table.max_chain; *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); @@ -1345,13 +894,12 @@ ush *flags; /* general purpose bit flag */ * 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 */ +static int longest_match(IPos cur_match) { unsigned chain_length = max_chain_length; /* max hash chain length */ register uch *scan = window + strstart; /* current string */ @@ -1369,20 +917,11 @@ IPos cur_match; /* current match */ * It is easy to get rid of this optimization if necessary. */ #if HASH_BITS < 8 || MAX_MATCH != 258 - error:Code too clever +# 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) { @@ -1398,42 +937,6 @@ IPos cur_match; /* current 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]) @@ -1460,34 +963,25 @@ IPos cur_match; /* current match */ 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; +static void check_match(IPos start, IPos match, int length) { /* check that the match is indeed a match */ if (memcmp((char *) window + match, @@ -1515,7 +1009,7 @@ int length; * file reads are performed for at least two bytes (required for the * translate_eol option). */ -local void fill_window() +static void fill_window() { register unsigned n, m; unsigned more = @@ -1580,7 +1074,7 @@ local void fill_window() * evaluation for matches: a match is finally adopted only if there is * no better match at the next window position. */ -ulg deflate() +static ulg deflate() { IPos hash_head; /* head of hash chain */ IPos prev_match; /* previous match */ @@ -1588,10 +1082,6 @@ ulg deflate() int match_available = 0; /* set if previous match exists */ register unsigned match_length = MIN_MATCH - 1; /* length of best match */ -#ifdef DEBUG - extern long isize; /* byte length of input file, for debug only */ -#endif - /* Process the input block. */ while (lookahead != 0) { /* Insert the string window[strstart .. strstart+2] in the @@ -1708,180 +1198,14 @@ ulg deflate() * 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. */ -#include <ctype.h> -#include <sys/types.h> -#include <signal.h> -#include <errno.h> - /* configuration */ -#ifdef NO_TIME_H -# include <sys/time.h> -#else -# include <time.h> -#endif - -#ifndef NO_FCNTL_H -# include <fcntl.h> -#endif - -#ifdef HAVE_UNISTD_H -# include <unistd.h> -#endif - -#if defined(DIRENT) -# include <dirent.h> typedef struct dirent dir_type; -# define NLENGTH(dirent) ((int)strlen((dirent)->d_name)) -# define DIR_OPT "DIRENT" -#else -# define NLENGTH(dirent) ((dirent)->d_namlen) -# ifdef SYSDIR -# include <sys/dir.h> -typedef struct direct dir_type; - -# define DIR_OPT "SYSDIR" -# else -# ifdef SYSNDIR -# include <sys/ndir.h> -typedef struct direct dir_type; - -# define DIR_OPT "SYSNDIR" -# else -# ifdef NDIR -# include <ndir.h> -typedef struct direct dir_type; - -# define DIR_OPT "NDIR" -# else -# define NO_DIR -# define DIR_OPT "NO_DIR" -# endif -# endif -# endif -#endif - -#ifndef NO_UTIME -# ifndef NO_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 "" -# 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) (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 - -#ifdef NO_OFF_T -typedef long off_t; -off_t lseek (int fd, off_t offset, int whence); -#endif - -/* Separator for file name parts (see shorten_name()) */ -#ifdef NO_MULTIPLE_DOTS -# define PART_SEP "-" -#else -# define PART_SEP "." -#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 */ - -static int foreground; /* set if program run in foreground */ -static int method = DEFLATED; /* compression method */ -static int exit_code = OK; /* program exit code */ -static int part_nb; /* number of parts in .gz file */ -static long time_stamp; /* original time stamp (modification time) */ -static long ifile_size; /* input file size, -1 for devices (debug only) */ -static char z_suffix[MAX_SUFFIX + 1]; /* default suffix (can be set with --suffix) */ -static int z_len; /* strlen(z_suffix) */ - -static long bytes_in; /* number of input bytes */ -static long bytes_out; /* number of output bytes */ -static char ifname[MAX_PATH_LEN]; /* input file name */ -static char ofname[MAX_PATH_LEN]; /* output file name */ -static int ifd; /* input file descriptor */ -static int ofd; /* output file descriptor */ -static unsigned insize; /* valid bytes in inbuf */ -static unsigned outcnt; /* bytes in output buffer */ - -/* local functions */ - -#define strequ(s1, s2) (strcmp((s1),(s2)) == 0) /* ======================================================================== */ // int main (argc, argv) @@ -1953,12 +1277,7 @@ int gzip_main(int argc, char **argv) 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 if (fromstdin == 1) { strcpy(ofname, "stdin"); @@ -1986,7 +1305,6 @@ int gzip_main(int argc, char **argv) /* And get to work */ strcpy(ofname, "stdout"); outFileNum = fileno(stdout); - SET_BINARY_MODE(fileno(stdout)); clear_bufs(); /* clear input and output buffers */ part_nb = 0; @@ -2009,7 +1327,6 @@ int gzip_main(int argc, char **argv) #endif if (outFileNum < 0) perror_msg_and_die("%s", ofname); - SET_BINARY_MODE(outFileNum); /* Set permissions on the file */ fchmod(outFileNum, statBuf.st_mode); @@ -2088,8 +1405,6 @@ int gzip_main(int argc, char **argv) * */ -#include <ctype.h> - /* =========================================================================== * Constants */ @@ -2119,15 +1434,15 @@ int gzip_main(int argc, char **argv) /* number of codes used to transfer the bit lengths */ -local int near extra_lbits[LENGTH_CODES] /* extra bits for each length code */ +static const int 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 */ +static const int 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 */ +static const int 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 @@ -2198,10 +1513,10 @@ error cannot overlay l_buf and inbuf #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 */ +static ct_data dyn_ltree[HEAP_SIZE]; /* literal and length tree */ +static ct_data dyn_dtree[2 * D_CODES + 1]; /* distance tree */ -local ct_data near static_ltree[L_CODES + 2]; +static ct_data 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 @@ -2209,77 +1524,77 @@ local ct_data near static_ltree[L_CODES + 2]; * below). */ -local ct_data near static_dtree[D_CODES]; +static ct_data 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]; +static ct_data 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 */ + ct_data *dyn_tree; /* the dynamic tree */ + ct_data *static_tree; /* corresponding static tree or NULL */ + const int *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 = +static tree_desc l_desc = { dyn_ltree, static_ltree, extra_lbits, LITERALS + 1, L_CODES, MAX_BITS, 0 }; -local tree_desc near d_desc = +static tree_desc 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, +static tree_desc bl_desc = + { bl_tree, (ct_data *) 0, extra_blbits, 0, BL_CODES, MAX_BL_BITS, 0 }; -local ush near bl_count[MAX_BITS + 1]; +static ush bl_count[MAX_BITS + 1]; /* number of codes at each bit length for an optimal tree */ -local uch near bl_order[BL_CODES] +static const uch 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 */ +static int heap[2 * L_CODES + 1]; /* heap used to build the Huffman trees */ +static int heap_len; /* number of elements in the heap */ +static 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]; +static uch 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]; +static uch length_code[MAX_MATCH - MIN_MATCH + 1]; /* length code for each normalized match length (0 == MIN_MATCH) */ -local uch dist_code[512]; +static 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]; +static int base_length[LENGTH_CODES]; /* First normalized length for each code (0 = MIN_MATCH) */ -local int near base_dist[D_CODES]; +static int base_dist[D_CODES]; /* First normalized distance for each code (0 = distance of 1) */ @@ -2288,58 +1603,47 @@ local int near base_dist[D_CODES]; /* DECLARE(ush, d_buf, DIST_BUFSIZE); buffer for distances */ -local uch near flag_buf[(LIT_BUFSIZE / 8)]; +static uch 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 */ +static unsigned last_lit; /* running index in l_buf */ +static unsigned last_dist; /* running index in d_buf */ +static unsigned last_flags; /* running index in flag_buf */ +static uch flags; /* current flags not yet saved in flag_buf */ +static 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 ulg compressed_len; /* total bit length of compressed file */ +static ulg opt_len; /* bit length of current block with optimal trees */ +static ulg static_len; /* bit length of current block with static trees */ -local ulg input_len; /* total byte length of input file */ +static ulg compressed_len; /* total bit length of compressed 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 ulg bits_sent; /* bit length of the compressed data */ -extern long isize; /* byte length of input file */ -#endif - -extern long block_start; /* window offset of current block */ -extern unsigned near strstart; /* window offset of current string */ +static ush *file_type; /* pointer to UNKNOWN, BINARY or ASCII */ +static int *file_method; /* pointer to DEFLATE or STORE */ /* =========================================================================== * Local (static) routines in this file. */ -local void init_block (void); -local void pqdownheap (ct_data near * tree, int k); -local void gen_bitlen (tree_desc near * desc); -local void gen_codes (ct_data near * tree, int max_code); -local void build_tree (tree_desc near * desc); -local void scan_tree (ct_data near * tree, int max_code); -local void send_tree (ct_data near * tree, int max_code); -local int build_bl_tree (void); -local void send_all_trees (int lcodes, int dcodes, int blcodes); -local void compress_block (ct_data near * ltree, ct_data near * dtree); -local void set_file_type (void); +static void init_block (void); +static void pqdownheap (ct_data * tree, int k); +static void gen_bitlen (tree_desc * desc); +static void gen_codes (ct_data * tree, int max_code); +static void build_tree (tree_desc * desc); +static void scan_tree (ct_data * tree, int max_code); +static void send_tree (ct_data * tree, int max_code); +static int build_bl_tree (void); +static void send_all_trees (int lcodes, int dcodes, int blcodes); +static void compress_block (ct_data * ltree, ct_data * dtree); +static void set_file_type (void); #ifndef DEBUG @@ -2366,9 +1670,7 @@ local void set_file_type (void); * 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 */ +static void ct_init(ush *attr, int *methodp) { int n; /* iterates over tree elements */ int bits; /* bit counter */ @@ -2378,7 +1680,7 @@ int *methodp; /* pointer to compression method */ file_type = attr; file_method = methodp; - compressed_len = input_len = 0L; + compressed_len = 0L; if (static_dtree[0].Len != 0) return; /* ct_init already called */ @@ -2432,7 +1734,7 @@ int *methodp; /* pointer to compression method */ * tree construction to get a canonical Huffman tree (longest code * all ones) */ - gen_codes((ct_data near *) static_ltree, L_CODES + 1); + gen_codes((ct_data *) static_ltree, L_CODES + 1); /* The static distance tree is trivial: */ for (n = 0; n < D_CODES; n++) { @@ -2447,7 +1749,7 @@ int *methodp; /* pointer to compression method */ /* =========================================================================== * Initialize a new block. */ -local void init_block() +static void init_block() { int n; /* iterates over tree elements */ @@ -2495,9 +1797,7 @@ local void init_block() * 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 */ +static void pqdownheap(ct_data *tree, int k) { int v = heap[k]; int j = k << 1; /* left son of k */ @@ -2531,15 +1831,14 @@ int k; /* node to move down */ * 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 */ +static void gen_bitlen(tree_desc *desc) { - ct_data near *tree = desc->dyn_tree; - int near *extra = desc->extra_bits; + ct_data *tree = desc->dyn_tree; + const int *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; + ct_data *stree = desc->static_tree; int h; /* heap index */ int n, m; /* iterate over the tree elements */ int bits; /* bit length */ @@ -2629,9 +1928,7 @@ tree_desc near *desc; /* the tree descriptor */ * 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 */ +static void gen_codes(ct_data *tree, int max_code) { ush next_code[MAX_BITS + 1]; /* next code value for each bit length */ ush code = 0; /* running code value */ @@ -2674,11 +1971,10 @@ int max_code; /* largest code with non zero frequency */ * 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 */ +static void build_tree(tree_desc *desc) { - ct_data near *tree = desc->dyn_tree; - ct_data near *stree = desc->static_tree; + ct_data *tree = desc->dyn_tree; + ct_data *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 */ @@ -2754,10 +2050,10 @@ tree_desc near *desc; /* the tree descriptor */ /* At this point, the fields freq and dad are set. We can now * generate the bit lengths. */ - gen_bitlen((tree_desc near *) desc); + gen_bitlen((tree_desc *) desc); /* The field len is now set, we can generate the bit codes */ - gen_codes((ct_data near *) tree, max_code); + gen_codes((ct_data *) tree, max_code); } /* =========================================================================== @@ -2766,9 +2062,7 @@ tree_desc near *desc; /* the tree descriptor */ * 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 */ +static void scan_tree(ct_data *tree, int max_code) { int n; /* iterates over all tree elements */ int prevlen = -1; /* last emitted length */ @@ -2814,9 +2108,7 @@ int max_code; /* and its largest code of non zero frequency */ * 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 */ +static void send_tree(ct_data *tree, int max_code) { int n; /* iterates over all tree elements */ int prevlen = -1; /* last emitted length */ @@ -2873,16 +2165,16 @@ int max_code; /* and its largest code of non zero frequency */ * 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() +static const 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); + scan_tree((ct_data *) dyn_ltree, l_desc.max_code); + scan_tree((ct_data *) dyn_dtree, d_desc.max_code); /* Build the bit length tree: */ - build_tree((tree_desc near *) (&bl_desc)); + build_tree((tree_desc *) (&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. */ @@ -2909,8 +2201,7 @@ local int build_bl_tree() * 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 */ +static void send_all_trees(int lcodes, int dcodes, int blcodes) { int rank; /* index in bl_order */ @@ -2928,10 +2219,10 @@ int lcodes, dcodes, blcodes; /* number of codes for each tree */ } Tracev((stderr, "\nbl tree: sent %ld", bits_sent)); - send_tree((ct_data near *) dyn_ltree, lcodes - 1); /* send the literal tree */ + send_tree((ct_data *) dyn_ltree, lcodes - 1); /* send the literal tree */ Tracev((stderr, "\nlit tree: sent %ld", bits_sent)); - send_tree((ct_data near *) dyn_dtree, dcodes - 1); /* send the distance tree */ + send_tree((ct_data *) dyn_dtree, dcodes - 1); /* send the distance tree */ Tracev((stderr, "\ndist tree: sent %ld", bits_sent)); } @@ -2940,10 +2231,7 @@ int lcodes, dcodes, blcodes; /* number of codes for each tree */ * trees or store, and output the encoded block to the zip file. This function * returns the total compressed length for the file so far. */ -ulg 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 */ +static ulg flush_block(char *buf, ulg stored_len, int eof) { 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 */ @@ -2955,10 +2243,10 @@ int eof; /* true if this is the last block for a file */ set_file_type(); /* Construct the literal and distance trees */ - build_tree((tree_desc near *) (&l_desc)); + build_tree((tree_desc *) (&l_desc)); Tracev((stderr, "\nlit data: dyn %ld, stat %ld", opt_len, static_len)); - build_tree((tree_desc near *) (&d_desc)); + build_tree((tree_desc *) (&d_desc)); Tracev( (stderr, "\ndist data: dyn %ld, stat %ld", opt_len, static_len)); @@ -2974,7 +2262,6 @@ int eof; /* true if this is the last block for a file */ /* 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, @@ -2989,11 +2276,8 @@ int eof; /* true if this is the last block for a file */ * 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 -#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) error_msg("block vanished"); @@ -3002,11 +2286,8 @@ int eof; /* true if this is the last block for a file */ compressed_len = stored_len << 3; *file_method = STORED; -#ifdef FORCE_METHOD -#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 @@ -3019,27 +2300,23 @@ int eof; /* true if this is the last block for a file */ copy_block(buf, (unsigned) stored_len, 1); /* with header */ -#ifdef FORCE_METHOD -#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); + compress_block((ct_data *) static_ltree, + (ct_data *) 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); + compress_block((ct_data *) dyn_ltree, + (ct_data *) dyn_dtree); compressed_len += 3 + opt_len; } Assert(compressed_len == bits_sent, "bad compressed size"); init_block(); if (eof) { - Assert(input_len == isize, "bad input size"); bi_windup(); compressed_len += 7; /* align on byte boundary */ } @@ -3053,9 +2330,7 @@ int eof; /* true if this is the last block for a file */ * 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) */ +static int ct_tally(int dist, int lc) { l_buf[last_lit++] = (uch) lc; if (dist == 0) { @@ -3111,9 +2386,7 @@ int lc; /* match length-MIN_MATCH or unmatched char (if dist==0) */ /* =========================================================================== * 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 */ +static void compress_block(ct_data *ltree, ct_data *dtree) { unsigned dist; /* distance of matched string */ int lc; /* match length or unmatched char (if dist == 0) */ @@ -3165,7 +2438,7 @@ ct_data near *dtree; /* distance tree */ * 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() +static void set_file_type() { int n = 0; unsigned ascii_freq = 0; @@ -3183,228 +2456,22 @@ local void set_file_type() } } -/* 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. - */ - -#include <ctype.h> -#include <errno.h> -#include <sys/types.h> - -#ifdef HAVE_UNISTD_H -# include <unistd.h> -#endif -#ifndef NO_FCNTL_H -# include <fcntl.h> -#endif - -/* =========================================================================== - * 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 != EOF) { - write_buf(out, (char *) inbuf, insize); - bytes_out += insize; - insize = read(in, (char *) inbuf, INBUFSIZ); - } - if ((int) insize == EOF && errno != 0) { - read_error_msg(); - } - bytes_in = bytes_out; - return OK; -} - -/* ======================================================================== - * Put string s in lower case, return s. - */ -char *strlwr(s) -char *s; -{ - char *t; - - for (t = s; *t; t++) - *t = tolow(*t); - return s; -} - -#if defined(NO_STRING_H) && !defined(STDC_HEADERS) - -/* Provide missing strspn and strcspn functions. */ - -int strspn (const char *s, const char *accept); -int strcspn (const char *s, const char *reject); - -/* ======================================================================== - * Return the length of the maximum initial segment - * of s which contains only characters in accept. - */ -int strspn(s, accept) -const char *s; -const char *accept; -{ - register const char *p; - register const char *a; - register int count = 0; - - for (p = s; *p != '\0'; ++p) { - for (a = accept; *a != '\0'; ++a) { - if (*p == *a) - break; - } - if (*a == '\0') - return count; - ++count; - } - return count; -} - -/* ======================================================================== - * Return the length of the maximum inital segment of s - * which contains no characters from reject. - */ -int strcspn(s, reject) -const char *s; -const char *reject; -{ - register int count = 0; - - while (*s != '\0') { - if (strchr(reject, *s++) != NULL) - return count; - ++count; - } - return count; -} - -#endif /* NO_STRING_H */ - -/* ======================================================================== - * Add an environment variable (if any) before argv, and update argc. - * Return the expanded environment variable to be freed later, or NULL - * if no options were added to argv. - */ -#define SEPARATOR " \t" /* separators in env variable */ - -char *add_envopt(argcp, argvp, env) -int *argcp; /* pointer to argc */ -char ***argvp; /* pointer to argv */ -char *env; /* name of environment variable */ -{ - char *p; /* running pointer through env variable */ - char **oargv; /* runs through old argv array */ - char **nargv; /* runs through new argv array */ - int oargc = *argcp; /* old argc */ - int nargc = 0; /* number of arguments in env variable */ - - env = (char *) getenv(env); - if (env == NULL) - return NULL; - - p = (char *) xmalloc(strlen(env) + 1); - env = strcpy(p, env); /* keep env variable intact */ - - for (p = env; *p; nargc++) { /* move through env */ - p += strspn(p, SEPARATOR); /* skip leading separators */ - if (*p == '\0') - break; - - p += strcspn(p, SEPARATOR); /* find end of word */ - if (*p) - *p++ = '\0'; /* mark it */ - } - if (nargc == 0) { - free(env); - return NULL; - } - *argcp += nargc; - /* Allocate the new argv array, with an extra element just in case - * the original arg list did not end with a NULL. - */ - nargv = (char **) calloc(*argcp + 1, sizeof(char *)); - - if (nargv == NULL) - error_msg(memory_exhausted); - oargv = *argvp; - *argvp = nargv; - - /* Copy the program name first */ - if (oargc-- < 0) - error_msg("argc<=0"); - *(nargv++) = *(oargv++); - - /* Then copy the environment args */ - for (p = env; nargc > 0; nargc--) { - p += strspn(p, SEPARATOR); /* skip separators */ - *(nargv++) = p; /* store start */ - while (*p++); /* skip over word */ - } - - /* Finally copy the old args and add a NULL (usual convention) */ - while (oargc--) - *(nargv++) = *(oargv++); - *nargv = NULL; - return env; -} - -/* ======================================================================== - * Display compression ratio on the given stream on 6 characters. - */ -void display_ratio(num, den, file) -long num; -long den; -FILE *file; -{ - long ratio; /* 1000 times the compression ratio */ - - if (den == 0) { - ratio = 0; /* no compression */ - } else if (den < 2147483L) { /* (2**31 -1)/1000 */ - ratio = 1000L * num / den; - } else { - ratio = num / (den / 1000L); - } - if (ratio < 0) { - putc('-', file); - ratio = -ratio; - } else { - putc(' ', file); - } - fprintf(file, "%2ld.%1ld%%", ratio / 10L, ratio % 10L); -} - - /* 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. */ -#include <ctype.h> -#include <sys/types.h> - -#ifdef HAVE_UNISTD_H -# include <unistd.h> -#endif -#ifndef NO_FCNTL_H -# include <fcntl.h> -#endif -local ulg crc; /* crc on uncompressed file data */ -long header_bytes; /* number of bytes in gzip header */ +static ulg crc; /* crc on uncompressed file data */ +static long 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 */ +static int zip(int in, int out) { uch my_flags = 0; /* general purpose bit flags */ ush attr = 0; /* ascii/binary flag */ @@ -3454,9 +2521,7 @@ int in, out; /* input and output file descriptors */ * 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; +static int file_read(char *buf, unsigned size) { unsigned len; @@ -3475,12 +2540,11 @@ unsigned size; * Write the output buffer outbuf[0..outcnt-1] and update bytes_out. * (used for the compressed data only) */ -void flush_outbuf() +static void flush_outbuf() { if (outcnt == 0) return; write_buf(ofd, (char *) outbuf, outcnt); - bytes_out += (ulg) outcnt; outcnt = 0; } |