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author | Maurus Cuelenaere <mcuelenaere@gmail.com> | 2008-07-11 15:50:46 +0000 |
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committer | Maurus Cuelenaere <mcuelenaere@gmail.com> | 2008-07-11 15:50:46 +0000 |
commit | 14c7f45cdae826f88dc539c8c38dd95caf305731 (patch) | |
tree | 832da054b7cfb2dc6fd63339af736625f31d21aa /utils/zenutils/libraries/zlib123/zlib/minigzip.c | |
parent | 7c84ede3781c27db73403bd6302f320c76a58c8c (diff) | |
download | rockbox-14c7f45cdae826f88dc539c8c38dd95caf305731.tar.gz rockbox-14c7f45cdae826f88dc539c8c38dd95caf305731.zip |
Add zook's ZenUtils to SVN
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@18010 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'utils/zenutils/libraries/zlib123/zlib/minigzip.c')
-rwxr-xr-x | utils/zenutils/libraries/zlib123/zlib/minigzip.c | 322 |
1 files changed, 322 insertions, 0 deletions
diff --git a/utils/zenutils/libraries/zlib123/zlib/minigzip.c b/utils/zenutils/libraries/zlib123/zlib/minigzip.c new file mode 100755 index 0000000000..41996dbc9a --- /dev/null +++ b/utils/zenutils/libraries/zlib123/zlib/minigzip.c | |||
@@ -0,0 +1,322 @@ | |||
1 | /* minigzip.c -- simulate gzip using the zlib compression library | ||
2 | * Copyright (C) 1995-2005 Jean-loup Gailly. | ||
3 | * For conditions of distribution and use, see copyright notice in zlib.h | ||
4 | */ | ||
5 | |||
6 | /* | ||
7 | * minigzip is a minimal implementation of the gzip utility. This is | ||
8 | * only an example of using zlib and isn't meant to replace the | ||
9 | * full-featured gzip. No attempt is made to deal with file systems | ||
10 | * limiting names to 14 or 8+3 characters, etc... Error checking is | ||
11 | * very limited. So use minigzip only for testing; use gzip for the | ||
12 | * real thing. On MSDOS, use only on file names without extension | ||
13 | * or in pipe mode. | ||
14 | */ | ||
15 | |||
16 | /* @(#) $Id$ */ | ||
17 | |||
18 | #include <stdio.h> | ||
19 | #include "zlib.h" | ||
20 | |||
21 | #ifdef STDC | ||
22 | # include <string.h> | ||
23 | # include <stdlib.h> | ||
24 | #endif | ||
25 | |||
26 | #ifdef USE_MMAP | ||
27 | # include <sys/types.h> | ||
28 | # include <sys/mman.h> | ||
29 | # include <sys/stat.h> | ||
30 | #endif | ||
31 | |||
32 | #if defined(MSDOS) || defined(OS2) || defined(WIN32) || defined(__CYGWIN__) | ||
33 | # include <fcntl.h> | ||
34 | # include <io.h> | ||
35 | # define SET_BINARY_MODE(file) setmode(fileno(file), O_BINARY) | ||
36 | #else | ||
37 | # define SET_BINARY_MODE(file) | ||
38 | #endif | ||
39 | |||
40 | #ifdef VMS | ||
41 | # define unlink delete | ||
42 | # define GZ_SUFFIX "-gz" | ||
43 | #endif | ||
44 | #ifdef RISCOS | ||
45 | # define unlink remove | ||
46 | # define GZ_SUFFIX "-gz" | ||
47 | # define fileno(file) file->__file | ||
48 | #endif | ||
49 | #if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os | ||
50 | # include <unix.h> /* for fileno */ | ||
51 | #endif | ||
52 | |||
53 | #ifndef WIN32 /* unlink already in stdio.h for WIN32 */ | ||
54 | extern int unlink OF((const char *)); | ||
55 | #endif | ||
56 | |||
57 | #ifndef GZ_SUFFIX | ||
58 | # define GZ_SUFFIX ".gz" | ||
59 | #endif | ||
60 | #define SUFFIX_LEN (sizeof(GZ_SUFFIX)-1) | ||
61 | |||
62 | #define BUFLEN 16384 | ||
63 | #define MAX_NAME_LEN 1024 | ||
64 | |||
65 | #ifdef MAXSEG_64K | ||
66 | # define local static | ||
67 | /* Needed for systems with limitation on stack size. */ | ||
68 | #else | ||
69 | # define local | ||
70 | #endif | ||
71 | |||
72 | char *prog; | ||
73 | |||
74 | void error OF((const char *msg)); | ||
75 | void gz_compress OF((FILE *in, gzFile out)); | ||
76 | #ifdef USE_MMAP | ||
77 | int gz_compress_mmap OF((FILE *in, gzFile out)); | ||
78 | #endif | ||
79 | void gz_uncompress OF((gzFile in, FILE *out)); | ||
80 | void file_compress OF((char *file, char *mode)); | ||
81 | void file_uncompress OF((char *file)); | ||
82 | int main OF((int argc, char *argv[])); | ||
83 | |||
84 | /* =========================================================================== | ||
85 | * Display error message and exit | ||
86 | */ | ||
87 | void error(msg) | ||
88 | const char *msg; | ||
89 | { | ||
90 | fprintf(stderr, "%s: %s\n", prog, msg); | ||
91 | exit(1); | ||
92 | } | ||
93 | |||
94 | /* =========================================================================== | ||
95 | * Compress input to output then close both files. | ||
96 | */ | ||
97 | |||
98 | void gz_compress(in, out) | ||
99 | FILE *in; | ||
100 | gzFile out; | ||
101 | { | ||
102 | local char buf[BUFLEN]; | ||
103 | int len; | ||
104 | int err; | ||
105 | |||
106 | #ifdef USE_MMAP | ||
107 | /* Try first compressing with mmap. If mmap fails (minigzip used in a | ||
108 | * pipe), use the normal fread loop. | ||
109 | */ | ||
110 | if (gz_compress_mmap(in, out) == Z_OK) return; | ||
111 | #endif | ||
112 | for (;;) { | ||
113 | len = (int)fread(buf, 1, sizeof(buf), in); | ||
114 | if (ferror(in)) { | ||
115 | perror("fread"); | ||
116 | exit(1); | ||
117 | } | ||
118 | if (len == 0) break; | ||
119 | |||
120 | if (gzwrite(out, buf, (unsigned)len) != len) error(gzerror(out, &err)); | ||
121 | } | ||
122 | fclose(in); | ||
123 | if (gzclose(out) != Z_OK) error("failed gzclose"); | ||
124 | } | ||
125 | |||
126 | #ifdef USE_MMAP /* MMAP version, Miguel Albrecht <malbrech@eso.org> */ | ||
127 | |||
128 | /* Try compressing the input file at once using mmap. Return Z_OK if | ||
129 | * if success, Z_ERRNO otherwise. | ||
130 | */ | ||
131 | int gz_compress_mmap(in, out) | ||
132 | FILE *in; | ||
133 | gzFile out; | ||
134 | { | ||
135 | int len; | ||
136 | int err; | ||
137 | int ifd = fileno(in); | ||
138 | caddr_t buf; /* mmap'ed buffer for the entire input file */ | ||
139 | off_t buf_len; /* length of the input file */ | ||
140 | struct stat sb; | ||
141 | |||
142 | /* Determine the size of the file, needed for mmap: */ | ||
143 | if (fstat(ifd, &sb) < 0) return Z_ERRNO; | ||
144 | buf_len = sb.st_size; | ||
145 | if (buf_len <= 0) return Z_ERRNO; | ||
146 | |||
147 | /* Now do the actual mmap: */ | ||
148 | buf = mmap((caddr_t) 0, buf_len, PROT_READ, MAP_SHARED, ifd, (off_t)0); | ||
149 | if (buf == (caddr_t)(-1)) return Z_ERRNO; | ||
150 | |||
151 | /* Compress the whole file at once: */ | ||
152 | len = gzwrite(out, (char *)buf, (unsigned)buf_len); | ||
153 | |||
154 | if (len != (int)buf_len) error(gzerror(out, &err)); | ||
155 | |||
156 | munmap(buf, buf_len); | ||
157 | fclose(in); | ||
158 | if (gzclose(out) != Z_OK) error("failed gzclose"); | ||
159 | return Z_OK; | ||
160 | } | ||
161 | #endif /* USE_MMAP */ | ||
162 | |||
163 | /* =========================================================================== | ||
164 | * Uncompress input to output then close both files. | ||
165 | */ | ||
166 | void gz_uncompress(in, out) | ||
167 | gzFile in; | ||
168 | FILE *out; | ||
169 | { | ||
170 | local char buf[BUFLEN]; | ||
171 | int len; | ||
172 | int err; | ||
173 | |||
174 | for (;;) { | ||
175 | len = gzread(in, buf, sizeof(buf)); | ||
176 | if (len < 0) error (gzerror(in, &err)); | ||
177 | if (len == 0) break; | ||
178 | |||
179 | if ((int)fwrite(buf, 1, (unsigned)len, out) != len) { | ||
180 | error("failed fwrite"); | ||
181 | } | ||
182 | } | ||
183 | if (fclose(out)) error("failed fclose"); | ||
184 | |||
185 | if (gzclose(in) != Z_OK) error("failed gzclose"); | ||
186 | } | ||
187 | |||
188 | |||
189 | /* =========================================================================== | ||
190 | * Compress the given file: create a corresponding .gz file and remove the | ||
191 | * original. | ||
192 | */ | ||
193 | void file_compress(file, mode) | ||
194 | char *file; | ||
195 | char *mode; | ||
196 | { | ||
197 | local char outfile[MAX_NAME_LEN]; | ||
198 | FILE *in; | ||
199 | gzFile out; | ||
200 | |||
201 | strcpy(outfile, file); | ||
202 | strcat(outfile, GZ_SUFFIX); | ||
203 | |||
204 | in = fopen(file, "rb"); | ||
205 | if (in == NULL) { | ||
206 | perror(file); | ||
207 | exit(1); | ||
208 | } | ||
209 | out = gzopen(outfile, mode); | ||
210 | if (out == NULL) { | ||
211 | fprintf(stderr, "%s: can't gzopen %s\n", prog, outfile); | ||
212 | exit(1); | ||
213 | } | ||
214 | gz_compress(in, out); | ||
215 | |||
216 | unlink(file); | ||
217 | } | ||
218 | |||
219 | |||
220 | /* =========================================================================== | ||
221 | * Uncompress the given file and remove the original. | ||
222 | */ | ||
223 | void file_uncompress(file) | ||
224 | char *file; | ||
225 | { | ||
226 | local char buf[MAX_NAME_LEN]; | ||
227 | char *infile, *outfile; | ||
228 | FILE *out; | ||
229 | gzFile in; | ||
230 | uInt len = (uInt)strlen(file); | ||
231 | |||
232 | strcpy(buf, file); | ||
233 | |||
234 | if (len > SUFFIX_LEN && strcmp(file+len-SUFFIX_LEN, GZ_SUFFIX) == 0) { | ||
235 | infile = file; | ||
236 | outfile = buf; | ||
237 | outfile[len-3] = '\0'; | ||
238 | } else { | ||
239 | outfile = file; | ||
240 | infile = buf; | ||
241 | strcat(infile, GZ_SUFFIX); | ||
242 | } | ||
243 | in = gzopen(infile, "rb"); | ||
244 | if (in == NULL) { | ||
245 | fprintf(stderr, "%s: can't gzopen %s\n", prog, infile); | ||
246 | exit(1); | ||
247 | } | ||
248 | out = fopen(outfile, "wb"); | ||
249 | if (out == NULL) { | ||
250 | perror(file); | ||
251 | exit(1); | ||
252 | } | ||
253 | |||
254 | gz_uncompress(in, out); | ||
255 | |||
256 | unlink(infile); | ||
257 | } | ||
258 | |||
259 | |||
260 | /* =========================================================================== | ||
261 | * Usage: minigzip [-d] [-f] [-h] [-r] [-1 to -9] [files...] | ||
262 | * -d : decompress | ||
263 | * -f : compress with Z_FILTERED | ||
264 | * -h : compress with Z_HUFFMAN_ONLY | ||
265 | * -r : compress with Z_RLE | ||
266 | * -1 to -9 : compression level | ||
267 | */ | ||
268 | |||
269 | int main(argc, argv) | ||
270 | int argc; | ||
271 | char *argv[]; | ||
272 | { | ||
273 | int uncompr = 0; | ||
274 | gzFile file; | ||
275 | char outmode[20]; | ||
276 | |||
277 | strcpy(outmode, "wb6 "); | ||
278 | |||
279 | prog = argv[0]; | ||
280 | argc--, argv++; | ||
281 | |||
282 | while (argc > 0) { | ||
283 | if (strcmp(*argv, "-d") == 0) | ||
284 | uncompr = 1; | ||
285 | else if (strcmp(*argv, "-f") == 0) | ||
286 | outmode[3] = 'f'; | ||
287 | else if (strcmp(*argv, "-h") == 0) | ||
288 | outmode[3] = 'h'; | ||
289 | else if (strcmp(*argv, "-r") == 0) | ||
290 | outmode[3] = 'R'; | ||
291 | else if ((*argv)[0] == '-' && (*argv)[1] >= '1' && (*argv)[1] <= '9' && | ||
292 | (*argv)[2] == 0) | ||
293 | outmode[2] = (*argv)[1]; | ||
294 | else | ||
295 | break; | ||
296 | argc--, argv++; | ||
297 | } | ||
298 | if (outmode[3] == ' ') | ||
299 | outmode[3] = 0; | ||
300 | if (argc == 0) { | ||
301 | SET_BINARY_MODE(stdin); | ||
302 | SET_BINARY_MODE(stdout); | ||
303 | if (uncompr) { | ||
304 | file = gzdopen(fileno(stdin), "rb"); | ||
305 | if (file == NULL) error("can't gzdopen stdin"); | ||
306 | gz_uncompress(file, stdout); | ||
307 | } else { | ||
308 | file = gzdopen(fileno(stdout), outmode); | ||
309 | if (file == NULL) error("can't gzdopen stdout"); | ||
310 | gz_compress(stdin, file); | ||
311 | } | ||
312 | } else { | ||
313 | do { | ||
314 | if (uncompr) { | ||
315 | file_uncompress(*argv); | ||
316 | } else { | ||
317 | file_compress(*argv, outmode); | ||
318 | } | ||
319 | } while (argv++, --argc); | ||
320 | } | ||
321 | return 0; | ||
322 | } | ||