/* 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)
/* I don't like nested includes, but the string and io functions are used
#if !defined(NO_STRING_H) || defined(STDC_HEADERS)
# if !defined(STDC_HEADERS) && !defined(NO_MEMORY_H) && !defined(__GNUC__)
# define memzero(s, n) memset ((voidp)(s), 0, (n))
# 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))
typedef unsigned char uch
;
typedef unsigned short ush
;
typedef unsigned long ulg
;
/* Return codes from gzip */
/* Compression methods (see algorithm.doc) */
/* methods 4 to 7 reserved */
extern int method
; /* compression method */
/* To save memory for 16 bit systems, some arrays are overlaid between
* deflate: prev+head window d_buf l_buf outbuf
* unlzw: tab_prefix tab_suffix stack inbuf outbuf
* 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.
# define INBUFSIZ 0x2000 /* input buffer size */
# define INBUFSIZ 0x8000 /* input buffer size */
#define INBUF_EXTRA 64 /* required by unlzw() */
# define OUTBUFSIZ 8192 /* output buffer size */
# define OUTBUFSIZ 16384 /* output buffer size */
#define OUTBUF_EXTRA 2048 /* required by unlzw() */
# define DIST_BUFSIZE 0x2000 /* buffer for distances, see trees.c */
# define DIST_BUFSIZE 0x8000 /* buffer for distances, see trees.c */
# 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;}
# define EXTERN(type, array) extern type array[]
# define DECLARE(type, array, size) type array[size]
# define ALLOC(type, array, size)
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
# 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) */
# define tab_prefix0 prev
# define head tab_prefix1
EXTERN(ush
, tab_prefix0
); /* prefix for even codes */
EXTERN(ush
, tab_prefix1
); /* prefix for odd codes */
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 */
/* 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 */
#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 WSIZE 0x8000 /* window size--must be a power of two, and */
#endif /* at least 32K for zip's deflate method */
/* 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
#define put_byte(c) {outbuf[outcnt++]=(uch)(c); if (outcnt==OUTBUFSIZ)\
#define put_ubyte(c) {window[outcnt++]=(uch)(c); if (outcnt==WSIZE)\
/* Output a 16 bit value, lsb first */
{ if (outcnt < OUTBUFSIZ-2) { \
outbuf[outcnt++] = (uch) ((w) & 0xff); \
outbuf[outcnt++] = (uch) ((ush)(w) >> 8); \
put_byte((uch)((w) & 0xff)); \
put_byte((uch)((ush)(w) >> 8)); \
/* Output a 32 bit value to the bit stream, lsb first */
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 */
# 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 ;}
# define Assert(cond,msg)
#define WARN(msg) {if (!quiet) fprintf msg ; \
if (exit_code == OK) exit_code = WARNING;}
extern int zip
OF((int in
, int out
));
extern int file_read
OF((char *buf
, unsigned size
));
extern int unzip
OF((int in
, int out
));
extern int check_zipfile
OF((int in
));
extern int unpack
OF((int in
, int out
));
extern int unlzh
OF((int in
, int out
));
RETSIGTYPE abort_gzip
OF((void));
void lm_init
OF((int pack_level
, ush
*flags
));
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
));
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
));
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
));
extern int inflate
OF((void));