![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to gzip.h CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [MW Coherent from dump] / coherent / g / usr / bin / gzip|
Return to gzip.h CVS log | Up to [MW Coherent from dump] / coherent / g / usr / bin / gzip |
1.1 root 1: /* gzip.h -- common declarations for all gzip modules
2: * Copyright (C) 1992-1993 Jean-loup Gailly.
3: * This is free software; you can redistribute it and/or modify it under the
4: * terms of the GNU General Public License, see the file COPYING.
5: */
6:
7: #if defined(__STDC__) || defined(PROTO)
8: # define OF(args) args
9: #else
10: # define OF(args) ()
11: #endif
12:
13: #ifdef __STDC__
14: typedef void *voidp;
15: #else
16: typedef char *voidp;
17: #endif
18:
19: /* I don't like nested includes, but the string functions are used too often */
20: #if !defined(NO_STRING_H) || defined(STDC_HEADERS)
21: # include <string.h>
22: # define memzero(s, n) memset ((s), 0, (n))
23: #else
24: # include <strings.h>
25: # define strchr index
26: # define strrchr rindex
27: # define memcpy(d, s, n) bcopy((s), (d), (n))
28: # define memcmp(s1, s2, n) bcmp((s1), (s2), (n))
29: # define memzero(s, n) bzero((s), (n))
30: #endif
31:
32: #if !defined(STDC_HEADERS) && !defined(NO_MEMORY_H)
33: # include <memory.h>
34: #endif
35:
36: #ifndef RETSIGTYPE
37: # define RETSIGTYPE void
38: #endif
39:
40: #define local static
41:
42: typedef unsigned char uch;
43: typedef unsigned short ush;
44: typedef unsigned long ulg;
45:
46: /* Return codes from gzip */
47: #define OK 0
48: #define ERROR 1
49: #define WARNING 2
50:
51: /* Compression methods (see algorithm.doc) */
52: #define STORED 0
53: #define COMPRESSED 1
54: #define PACKED 2
55: /* methods 3 to 7 reserved */
56: #define DEFLATED 8
57: extern int method; /* compression method */
58:
59: /* To save memory for 16 bit systems, some arrays are overlayed between
60: * the various modules:
61: * deflate: prev+head window d_buf l_buf outbuf
62: * unlzw: tab_prefix tab_suffix stack inbuf outbuf
63: * inflate: window inbuf
64: * unpack: window inbuf
65: * For compression, input is done in window[]. For decompression, output
66: * is done in window except for unlzw.
67: */
68:
69: #ifndef INBUFSIZ
70: # define INBUFSIZ 0x8000 /* input buffer size */
71: #endif
72: #define INBUF_EXTRA 64 /* required by unlzw() */
73:
74: #ifndef OUTBUFSIZ
75: # define OUTBUFSIZ 16384 /* output buffer size */
76: #endif
77: #define OUTBUF_EXTRA 2048 /* required by unlzw() */
78:
79: #define DIST_BUFSIZE 0x8000 /* buffer for distances, see trees.c */
80:
81: #ifdef DYN_ALLOC
82: # define EXTERN(type, array) extern type * near array
83: # define DECLARE(type, array, size) type * near array
84: # define ALLOC(type, array, size) { \
85: array = (type*)fcalloc((unsigned)(((size)+1L)/2), 2*sizeof(type)); \
86: if (array == NULL) error("insufficient memory"); \
87: }
88: # define FREE(array) {if (array != NULL) fcfree(array), array=NULL;}
89: #else
90: # define EXTERN(type, array) extern type array[]
91: # define DECLARE(type, array, size) type array[size]
92: # define ALLOC(type, array, size)
93: # define FREE(array)
94: #endif
95:
96: EXTERN(uch, inbuf); /* input buffer */
97: EXTERN(uch, outbuf); /* output buffer */
98: EXTERN(ush, d_buf); /* buffer for distances, see trees.c */
99: EXTERN(uch, window); /* Sliding window and suffix table (unlzw) */
100: #define tab_suffix window
101: #ifndef MAXSEG_64K
102: # define tab_prefix prev /* hash link (see deflate.c) */
103: # define head (prev+WSIZE) /* hash head (see deflate.c) */
104: EXTERN(ush, tab_prefix); /* prefix code (see unlzw.c) */
105: #else
106: # define tab_prefix0 prev
107: # define head tab_prefix1
108: EXTERN(ush, tab_prefix0); /* prefix for even codes */
109: EXTERN(ush, tab_prefix1); /* prefix for odd codes */
110: #endif
111:
112: extern unsigned insize; /* valid bytes in inbuf */
113: extern unsigned inptr; /* index of next byte to be processed in inbuf */
114: extern unsigned outcnt; /* bytes in output buffer */
115:
116: extern long bytes_in; /* number of input bytes */
117: extern long bytes_out; /* number of output bytes */
118: extern long overhead; /* number of bytes in gzip header */
119:
120: #define isize bytes_in
121: /* for compatibility with old zip sources (to be cleaned) */
122:
123: extern int ifd; /* input file descriptor */
124: extern int ofd; /* output file descriptor */
125: extern char ifname[]; /* input filename or "stdin" */
126: extern char ofname[]; /* output filename or "stdout" */
127:
128: extern ulg time_stamp; /* original time stamp (modification time) */
129: extern long ifile_size; /* input file size, -1 for devices (debug only) */
130:
131: typedef int file_t; /* Do not use stdio */
132: #define NO_FILE (-1) /* in memory compression */
133:
134:
135: #define GZIP_MAGIC "\037\213" /* Magic header for gzip files, 1F 8B */
136: #define OLD_GZIP_MAGIC "\037\236" /* Magic header for gzip 0.5 = freeze 1.x */
137: #define PKZIP_MAGIC "PK\003\004" /* Magic header for pkzip files */
138: #define PACK_MAGIC "\037\036" /* Magic header for packed files */
139:
140: /* gzip flag byte */
141: #define ASCII_FLAG 0x01 /* bit 0 set: file probably ascii text */
142: #define CONTINUATION 0x02 /* bit 1 set: continuation of multi-part gzip file */
143: #define EXTRA_FIELD 0x04 /* bit 2 set: extra field present */
144: #define ORIG_NAME 0x08 /* bit 3 set: original file name present */
145: #define COMMENT 0x10 /* bit 4 set: file comment present */
146: #define ENCRYPTED 0x20 /* bit 5 set: file is encrypted */
147: #define RESERVED 0xC0 /* bit 6,7: reserved */
148:
149: /* internal file attribute */
150: #define UNKNOWN (-1)
151: #define BINARY 0
152: #define ASCII 1
153:
154: #ifndef WSIZE
155: # define WSIZE 0x8000 /* window size--must be a power of two, and */
156: #endif /* at least 32K for zip's deflate method */
157:
158: #define MIN_MATCH 3
159: #define MAX_MATCH 258
160: /* The minimum and maximum match lengths */
161:
162: #define MIN_LOOKAHEAD (MAX_MATCH+MIN_MATCH+1)
163: /* Minimum amount of lookahead, except at the end of the input file.
164: * See deflate.c for comments about the MIN_MATCH+1.
165: */
166:
167: #define MAX_DIST (WSIZE-MIN_LOOKAHEAD)
168: /* In order to simplify the code, particularly on 16 bit machines, match
169: * distances are limited to MAX_DIST instead of WSIZE.
170: */
171:
172: extern int decrypt; /* flag to turn on decryption */
173: extern int exit_code; /* program exit code */
174: extern int verbose; /* be verbose (-v) */
175: extern int quiet; /* be quiet (-q) */
176: extern int level; /* compression level */
177: extern int test; /* check .z file integrity */
178: extern int to_stdout; /* output to stdout (-c) */
179: extern int save_orig_name; /* set if original name must be saved */
180: extern int text_mode; /* set if original file is a text file (in variable
181: record format for VMS). Must stay 0 if unknown. */
182:
183: #define get_byte() (inptr < insize ? inbuf[inptr++] : fill_inbuf())
184:
185: /* put_byte is used for the compressed output, put_char for the
186: * uncompressed output. However unlzw() uses window for its
187: * suffix table instead of its output buffer, so it does not use put_char.
188: * (to be cleaned up).
189: */
190: #define put_byte(c) {outbuf[outcnt++]=(uch)(c); if (outcnt==OUTBUFSIZ)\
191: flush_outbuf();}
192: #define put_char(c) {window[outcnt++]=(uch)(c); if (outcnt==WSIZE)\
193: flush_window();}
194:
195: /* Output a 16 bit value, lsb first */
196: #define put_short(w) \
197: { if (outcnt < OUTBUFSIZ-2) { \
198: outbuf[outcnt++] = (uch) ((w) & 0xff); \
199: outbuf[outcnt++] = (uch) ((ush)(w) >> 8); \
200: } else { \
201: put_byte((uch)((w) & 0xff)); \
202: put_byte((uch)((ush)(w) >> 8)); \
203: } \
204: }
205:
206: /* Output a 32 bit value to the bit stream, lsb first */
207: #define put_long(n) { \
208: put_short((n) & 0xffff); \
209: put_short(((ulg)(n)) >> 16); \
210: }
211:
212: #define seekable() 0 /* force sequential output */
213: #define translate_eol 0 /* no option -a yet */
214:
215: #define tolow(c) (isupper(c) ? (c)-'A'+'a' : (c)) /* force to lower case */
216:
217: /* Macros for getting two-byte and four-byte header values */
218: #define SH(p) ((ush)(uch)((p)[0]) | ((ush)(uch)((p)[1]) << 8))
219: #define LG(p) ((ulg)(SH(p)) | ((ulg)(SH((p)+2)) << 16))
220:
221: /* Diagnostic functions */
222: #ifdef DEBUG
223: # define Assert(cond,msg) {if(!(cond)) error(msg);}
224: # define Trace(x) fprintf x
225: # define Tracev(x) {if (verbose) fprintf x ;}
226: # define Tracevv(x) {if (verbose>1) fprintf x ;}
227: # define Tracec(c,x) {if (verbose && (c)) fprintf x ;}
228: # define Tracecv(c,x) {if (verbose>1 && (c)) fprintf x ;}
229: #else
230: # define Assert(cond,msg)
231: # define Trace(x)
232: # define Tracev(x)
233: # define Tracevv(x)
234: # define Tracec(c,x)
235: # define Tracecv(c,x)
236: #endif
237:
238: #define WARN(msg) {if (!quiet) fprintf msg ; \
239: if (exit_code == OK) exit_code = WARNING;}
240:
241: /* in zip.c: */
242: extern void zip OF((int in, int out));
243: extern int file_read OF((char *buf, unsigned size));
244:
245: /* in unzip.c */
246: extern void unzip OF((int in, int out));
247: extern int check_zipfile OF((int in));
248:
249: /* in unpack.c */
250: extern void unpack OF((int in, int out));
251:
252: /* in gzip.c */
253: RETSIGTYPE abort_gzip OF((void));
254:
255: /* in deflate.c */
256: void lm_init OF((int pack_level, ush *flags));
257: ulg deflate OF((void));
258:
259: /* in trees.c */
260: void ct_init OF((ush *attr, int *method));
261: int ct_tally OF((int dist, int lc));
262: ulg flush_block OF((char *buf, ulg stored_len, int eof));
263:
264: /* in bits.c */
265: void bi_init OF((file_t zipfile));
266: void send_bits OF((int value, int length));
267: unsigned bi_reverse OF((unsigned value, int length));
268: void bi_windup OF((void));
269: void copy_block OF((char *buf, unsigned len, int header));
270: extern int (*read_buf) OF((char *buf, unsigned size));
271:
272: /* in util.c: */
273: extern ulg updcrc OF((uch *s, unsigned n));
274: extern void clear_bufs OF((void));
275: extern int fill_inbuf OF((void));
276: extern void flush_outbuf OF((void));
277: extern void flush_window OF((void));
278: extern char *strlwr OF((char *s));
279: extern char *basename OF((char *fname));
280: extern char *add_envopt OF((int *argcp, char ***argvp, char *env));
281: extern void error OF((char *m));
282: extern void warn OF((char *a, char *b));
283: extern void read_error OF((void));
284: extern void write_error OF((void));
285: extern void display_ratio OF((long num, long den));
286: extern voidp xmalloc OF((unsigned int size));
287:
288: /* in inflate.c */
289: extern int inflate OF((void));
This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.