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- /* 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 string and io functions are used
- * too often
- */
- #include <stdio.h>
- #if !defined(NO_STRING_H) || defined(STDC_HEADERS)
- # include <string.h>
- # if !defined(STDC_HEADERS) && !defined(NO_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) error("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 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 */
-
- #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 */
-
-
- #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) ? (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);}
- # 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));
- ulg deflate OF((void));
-
- /* in trees.c */
- void ct_init OF((ush *attr, int *method));
- int ct_tally OF((int dist, int lc));
- ulg 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 *basename OF((char *fname));
- extern void make_simple_name OF((char *name));
- extern char *add_envopt OF((int *argcp, char ***argvp, char *env));
- extern void error OF((char *m));
- extern void warn OF((char *a, char *b));
- extern void read_error OF((void));
- extern void write_error OF((void));
- extern void display_ratio OF((long num, long den, FILE *file));
- extern voidp xmalloc OF((unsigned int size));
-
- /* in inflate.c */
- extern int inflate OF((void));
-