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Commit | Line | Data |
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e4fbbfe9 RS |
1 | /* |
2 | * Copyright (c) 2006 Rene Scharfe | |
3 | */ | |
e4fbbfe9 | 4 | #include "cache.h" |
ec06bff5 | 5 | #include "archive.h" |
2158f883 | 6 | #include "streaming.h" |
e4fbbfe9 | 7 | |
e4fbbfe9 RS |
8 | static int zip_date; |
9 | static int zip_time; | |
10 | ||
11 | static unsigned char *zip_dir; | |
12 | static unsigned int zip_dir_size; | |
13 | ||
14 | static unsigned int zip_offset; | |
15 | static unsigned int zip_dir_offset; | |
16 | static unsigned int zip_dir_entries; | |
17 | ||
18 | #define ZIP_DIRECTORY_MIN_SIZE (1024 * 1024) | |
2158f883 | 19 | #define ZIP_STREAM (8) |
e4fbbfe9 RS |
20 | |
21 | struct zip_local_header { | |
22 | unsigned char magic[4]; | |
23 | unsigned char version[2]; | |
24 | unsigned char flags[2]; | |
25 | unsigned char compression_method[2]; | |
26 | unsigned char mtime[2]; | |
27 | unsigned char mdate[2]; | |
28 | unsigned char crc32[4]; | |
29 | unsigned char compressed_size[4]; | |
30 | unsigned char size[4]; | |
31 | unsigned char filename_length[2]; | |
32 | unsigned char extra_length[2]; | |
0ea865ce | 33 | unsigned char _end[1]; |
e4fbbfe9 RS |
34 | }; |
35 | ||
2158f883 RS |
36 | struct zip_data_desc { |
37 | unsigned char magic[4]; | |
38 | unsigned char crc32[4]; | |
39 | unsigned char compressed_size[4]; | |
40 | unsigned char size[4]; | |
41 | unsigned char _end[1]; | |
42 | }; | |
43 | ||
e4fbbfe9 RS |
44 | struct zip_dir_header { |
45 | unsigned char magic[4]; | |
46 | unsigned char creator_version[2]; | |
47 | unsigned char version[2]; | |
48 | unsigned char flags[2]; | |
49 | unsigned char compression_method[2]; | |
50 | unsigned char mtime[2]; | |
51 | unsigned char mdate[2]; | |
52 | unsigned char crc32[4]; | |
53 | unsigned char compressed_size[4]; | |
54 | unsigned char size[4]; | |
55 | unsigned char filename_length[2]; | |
56 | unsigned char extra_length[2]; | |
57 | unsigned char comment_length[2]; | |
58 | unsigned char disk[2]; | |
59 | unsigned char attr1[2]; | |
60 | unsigned char attr2[4]; | |
61 | unsigned char offset[4]; | |
0ea865ce | 62 | unsigned char _end[1]; |
e4fbbfe9 RS |
63 | }; |
64 | ||
65 | struct zip_dir_trailer { | |
66 | unsigned char magic[4]; | |
67 | unsigned char disk[2]; | |
68 | unsigned char directory_start_disk[2]; | |
69 | unsigned char entries_on_this_disk[2]; | |
70 | unsigned char entries[2]; | |
71 | unsigned char size[4]; | |
72 | unsigned char offset[4]; | |
73 | unsigned char comment_length[2]; | |
0ea865ce | 74 | unsigned char _end[1]; |
e4fbbfe9 RS |
75 | }; |
76 | ||
0ea865ce RS |
77 | /* |
78 | * On ARM, padding is added at the end of the struct, so a simple | |
79 | * sizeof(struct ...) reports two bytes more than the payload size | |
80 | * we're interested in. | |
81 | */ | |
82 | #define ZIP_LOCAL_HEADER_SIZE offsetof(struct zip_local_header, _end) | |
2158f883 | 83 | #define ZIP_DATA_DESC_SIZE offsetof(struct zip_data_desc, _end) |
0ea865ce RS |
84 | #define ZIP_DIR_HEADER_SIZE offsetof(struct zip_dir_header, _end) |
85 | #define ZIP_DIR_TRAILER_SIZE offsetof(struct zip_dir_trailer, _end) | |
86 | ||
e4fbbfe9 RS |
87 | static void copy_le16(unsigned char *dest, unsigned int n) |
88 | { | |
89 | dest[0] = 0xff & n; | |
90 | dest[1] = 0xff & (n >> 010); | |
91 | } | |
92 | ||
93 | static void copy_le32(unsigned char *dest, unsigned int n) | |
94 | { | |
95 | dest[0] = 0xff & n; | |
96 | dest[1] = 0xff & (n >> 010); | |
97 | dest[2] = 0xff & (n >> 020); | |
98 | dest[3] = 0xff & (n >> 030); | |
99 | } | |
100 | ||
101 | static void *zlib_deflate(void *data, unsigned long size, | |
3a176c6c | 102 | int compression_level, unsigned long *compressed_size) |
e4fbbfe9 | 103 | { |
ef49a7a0 | 104 | git_zstream stream; |
e4fbbfe9 RS |
105 | unsigned long maxsize; |
106 | void *buffer; | |
107 | int result; | |
108 | ||
109 | memset(&stream, 0, sizeof(stream)); | |
55bb5c91 | 110 | git_deflate_init(&stream, compression_level); |
225a6f10 | 111 | maxsize = git_deflate_bound(&stream, size); |
e4fbbfe9 RS |
112 | buffer = xmalloc(maxsize); |
113 | ||
114 | stream.next_in = data; | |
115 | stream.avail_in = size; | |
116 | stream.next_out = buffer; | |
117 | stream.avail_out = maxsize; | |
118 | ||
119 | do { | |
55bb5c91 | 120 | result = git_deflate(&stream, Z_FINISH); |
e4fbbfe9 RS |
121 | } while (result == Z_OK); |
122 | ||
123 | if (result != Z_STREAM_END) { | |
124 | free(buffer); | |
125 | return NULL; | |
126 | } | |
127 | ||
55bb5c91 | 128 | git_deflate_end(&stream); |
e4fbbfe9 RS |
129 | *compressed_size = stream.total_out; |
130 | ||
131 | return buffer; | |
132 | } | |
133 | ||
2158f883 RS |
134 | static void write_zip_data_desc(unsigned long size, |
135 | unsigned long compressed_size, | |
136 | unsigned long crc) | |
137 | { | |
138 | struct zip_data_desc trailer; | |
139 | ||
140 | copy_le32(trailer.magic, 0x08074b50); | |
141 | copy_le32(trailer.crc32, crc); | |
142 | copy_le32(trailer.compressed_size, compressed_size); | |
143 | copy_le32(trailer.size, size); | |
144 | write_or_die(1, &trailer, ZIP_DATA_DESC_SIZE); | |
145 | } | |
146 | ||
ebf5374a RS |
147 | static void set_zip_dir_data_desc(struct zip_dir_header *header, |
148 | unsigned long size, | |
149 | unsigned long compressed_size, | |
150 | unsigned long crc) | |
151 | { | |
152 | copy_le32(header->crc32, crc); | |
153 | copy_le32(header->compressed_size, compressed_size); | |
154 | copy_le32(header->size, size); | |
155 | } | |
156 | ||
157 | static void set_zip_header_data_desc(struct zip_local_header *header, | |
158 | unsigned long size, | |
159 | unsigned long compressed_size, | |
160 | unsigned long crc) | |
161 | { | |
162 | copy_le32(header->crc32, crc); | |
163 | copy_le32(header->compressed_size, compressed_size); | |
164 | copy_le32(header->size, size); | |
165 | } | |
166 | ||
2158f883 RS |
167 | #define STREAM_BUFFER_SIZE (1024 * 16) |
168 | ||
562e25ab | 169 | static int write_zip_entry(struct archiver_args *args, |
9cb513b7 NTND |
170 | const unsigned char *sha1, |
171 | const char *path, size_t pathlen, | |
172 | unsigned int mode) | |
e4fbbfe9 RS |
173 | { |
174 | struct zip_local_header header; | |
175 | struct zip_dir_header dirent; | |
62cdce17 | 176 | unsigned long attr2; |
e4fbbfe9 | 177 | unsigned long compressed_size; |
e4fbbfe9 RS |
178 | unsigned long crc; |
179 | unsigned long direntsize; | |
e4fbbfe9 | 180 | int method; |
e4fbbfe9 | 181 | unsigned char *out; |
e4fbbfe9 | 182 | void *deflated = NULL; |
9cb513b7 | 183 | void *buffer; |
2158f883 RS |
184 | struct git_istream *stream = NULL; |
185 | unsigned long flags = 0; | |
9cb513b7 | 186 | unsigned long size; |
e4fbbfe9 | 187 | |
38f4d138 | 188 | crc = crc32(0, NULL, 0); |
e4fbbfe9 | 189 | |
e4fbbfe9 | 190 | if (pathlen > 0xffff) { |
562e25ab RS |
191 | return error("path too long (%d chars, SHA1: %s): %s", |
192 | (int)pathlen, sha1_to_hex(sha1), path); | |
e4fbbfe9 RS |
193 | } |
194 | ||
302b9282 | 195 | if (S_ISDIR(mode) || S_ISGITLINK(mode)) { |
e4fbbfe9 | 196 | method = 0; |
62cdce17 | 197 | attr2 = 16; |
e4fbbfe9 | 198 | out = NULL; |
60df6bd1 | 199 | size = 0; |
e4fbbfe9 | 200 | compressed_size = 0; |
9cb513b7 NTND |
201 | buffer = NULL; |
202 | size = 0; | |
62cdce17 | 203 | } else if (S_ISREG(mode) || S_ISLNK(mode)) { |
2158f883 | 204 | enum object_type type = sha1_object_info(sha1, &size); |
9cb513b7 | 205 | |
62cdce17 | 206 | method = 0; |
76bf8d0e DP |
207 | attr2 = S_ISLNK(mode) ? ((mode | 0777) << 16) : |
208 | (mode & 0111) ? ((mode) << 16) : 0; | |
2158f883 | 209 | if (S_ISREG(mode) && args->compression_level != 0 && size > 0) |
62cdce17 | 210 | method = 8; |
e4fbbfe9 | 211 | compressed_size = size; |
2158f883 RS |
212 | |
213 | if (S_ISREG(mode) && type == OBJ_BLOB && !args->convert && | |
c743c215 | 214 | size > big_file_threshold) { |
2158f883 RS |
215 | stream = open_istream(sha1, &type, &size, NULL); |
216 | if (!stream) | |
217 | return error("cannot stream blob %s", | |
218 | sha1_to_hex(sha1)); | |
219 | flags |= ZIP_STREAM; | |
220 | out = buffer = NULL; | |
221 | } else { | |
222 | buffer = sha1_file_to_archive(args, path, sha1, mode, | |
223 | &type, &size); | |
224 | if (!buffer) | |
225 | return error("cannot read %s", | |
226 | sha1_to_hex(sha1)); | |
227 | crc = crc32(crc, buffer, size); | |
228 | out = buffer; | |
229 | } | |
e4fbbfe9 | 230 | } else { |
562e25ab RS |
231 | return error("unsupported file mode: 0%o (SHA1: %s)", mode, |
232 | sha1_to_hex(sha1)); | |
e4fbbfe9 RS |
233 | } |
234 | ||
2158f883 | 235 | if (buffer && method == 8) { |
3a176c6c RS |
236 | deflated = zlib_deflate(buffer, size, args->compression_level, |
237 | &compressed_size); | |
e4fbbfe9 RS |
238 | if (deflated && compressed_size - 6 < size) { |
239 | /* ZLIB --> raw compressed data (see RFC 1950) */ | |
240 | /* CMF and FLG ... */ | |
241 | out = (unsigned char *)deflated + 2; | |
242 | compressed_size -= 6; /* ... and ADLER32 */ | |
243 | } else { | |
244 | method = 0; | |
245 | compressed_size = size; | |
246 | } | |
247 | } | |
248 | ||
249 | /* make sure we have enough free space in the dictionary */ | |
0ea865ce | 250 | direntsize = ZIP_DIR_HEADER_SIZE + pathlen; |
e4fbbfe9 RS |
251 | while (zip_dir_size < zip_dir_offset + direntsize) { |
252 | zip_dir_size += ZIP_DIRECTORY_MIN_SIZE; | |
253 | zip_dir = xrealloc(zip_dir, zip_dir_size); | |
254 | } | |
255 | ||
256 | copy_le32(dirent.magic, 0x02014b50); | |
76bf8d0e DP |
257 | copy_le16(dirent.creator_version, |
258 | S_ISLNK(mode) || (S_ISREG(mode) && (mode & 0111)) ? 0x0317 : 0); | |
cf72fb07 | 259 | copy_le16(dirent.version, 10); |
2158f883 | 260 | copy_le16(dirent.flags, flags); |
e4fbbfe9 RS |
261 | copy_le16(dirent.compression_method, method); |
262 | copy_le16(dirent.mtime, zip_time); | |
263 | copy_le16(dirent.mdate, zip_date); | |
ebf5374a | 264 | set_zip_dir_data_desc(&dirent, size, compressed_size, crc); |
e4fbbfe9 RS |
265 | copy_le16(dirent.filename_length, pathlen); |
266 | copy_le16(dirent.extra_length, 0); | |
267 | copy_le16(dirent.comment_length, 0); | |
268 | copy_le16(dirent.disk, 0); | |
269 | copy_le16(dirent.attr1, 0); | |
62cdce17 | 270 | copy_le32(dirent.attr2, attr2); |
e4fbbfe9 | 271 | copy_le32(dirent.offset, zip_offset); |
e4fbbfe9 RS |
272 | |
273 | copy_le32(header.magic, 0x04034b50); | |
cf72fb07 | 274 | copy_le16(header.version, 10); |
2158f883 | 275 | copy_le16(header.flags, flags); |
e4fbbfe9 RS |
276 | copy_le16(header.compression_method, method); |
277 | copy_le16(header.mtime, zip_time); | |
278 | copy_le16(header.mdate, zip_date); | |
2158f883 RS |
279 | if (flags & ZIP_STREAM) |
280 | set_zip_header_data_desc(&header, 0, 0, 0); | |
281 | else | |
282 | set_zip_header_data_desc(&header, size, compressed_size, crc); | |
e4fbbfe9 RS |
283 | copy_le16(header.filename_length, pathlen); |
284 | copy_le16(header.extra_length, 0); | |
0ea865ce RS |
285 | write_or_die(1, &header, ZIP_LOCAL_HEADER_SIZE); |
286 | zip_offset += ZIP_LOCAL_HEADER_SIZE; | |
e4fbbfe9 RS |
287 | write_or_die(1, path, pathlen); |
288 | zip_offset += pathlen; | |
2158f883 RS |
289 | if (stream && method == 0) { |
290 | unsigned char buf[STREAM_BUFFER_SIZE]; | |
291 | ssize_t readlen; | |
292 | ||
293 | for (;;) { | |
294 | readlen = read_istream(stream, buf, sizeof(buf)); | |
295 | if (readlen <= 0) | |
296 | break; | |
297 | crc = crc32(crc, buf, readlen); | |
298 | write_or_die(1, buf, readlen); | |
299 | } | |
300 | close_istream(stream); | |
301 | if (readlen) | |
302 | return readlen; | |
303 | ||
304 | compressed_size = size; | |
305 | zip_offset += compressed_size; | |
306 | ||
307 | write_zip_data_desc(size, compressed_size, crc); | |
308 | zip_offset += ZIP_DATA_DESC_SIZE; | |
309 | ||
c743c215 RS |
310 | set_zip_dir_data_desc(&dirent, size, compressed_size, crc); |
311 | } else if (stream && method == 8) { | |
312 | unsigned char buf[STREAM_BUFFER_SIZE]; | |
313 | ssize_t readlen; | |
314 | git_zstream zstream; | |
315 | int result; | |
316 | size_t out_len; | |
317 | unsigned char compressed[STREAM_BUFFER_SIZE * 2]; | |
318 | ||
319 | memset(&zstream, 0, sizeof(zstream)); | |
320 | git_deflate_init(&zstream, args->compression_level); | |
321 | ||
322 | compressed_size = 0; | |
323 | zstream.next_out = compressed; | |
324 | zstream.avail_out = sizeof(compressed); | |
325 | ||
326 | for (;;) { | |
327 | readlen = read_istream(stream, buf, sizeof(buf)); | |
328 | if (readlen <= 0) | |
329 | break; | |
330 | crc = crc32(crc, buf, readlen); | |
331 | ||
332 | zstream.next_in = buf; | |
333 | zstream.avail_in = readlen; | |
334 | result = git_deflate(&zstream, 0); | |
335 | if (result != Z_OK) | |
336 | die("deflate error (%d)", result); | |
337 | out = compressed; | |
338 | if (!compressed_size) | |
339 | out += 2; | |
340 | out_len = zstream.next_out - out; | |
341 | ||
342 | if (out_len > 0) { | |
343 | write_or_die(1, out, out_len); | |
344 | compressed_size += out_len; | |
345 | zstream.next_out = compressed; | |
346 | zstream.avail_out = sizeof(compressed); | |
347 | } | |
348 | ||
349 | } | |
350 | close_istream(stream); | |
351 | if (readlen) | |
352 | return readlen; | |
353 | ||
354 | zstream.next_in = buf; | |
355 | zstream.avail_in = 0; | |
356 | result = git_deflate(&zstream, Z_FINISH); | |
357 | if (result != Z_STREAM_END) | |
358 | die("deflate error (%d)", result); | |
359 | ||
360 | git_deflate_end(&zstream); | |
361 | out = compressed; | |
362 | if (!compressed_size) | |
363 | out += 2; | |
364 | out_len = zstream.next_out - out - 4; | |
365 | write_or_die(1, out, out_len); | |
366 | compressed_size += out_len; | |
367 | zip_offset += compressed_size; | |
368 | ||
369 | write_zip_data_desc(size, compressed_size, crc); | |
370 | zip_offset += ZIP_DATA_DESC_SIZE; | |
371 | ||
2158f883 RS |
372 | set_zip_dir_data_desc(&dirent, size, compressed_size, crc); |
373 | } else if (compressed_size > 0) { | |
e4fbbfe9 RS |
374 | write_or_die(1, out, compressed_size); |
375 | zip_offset += compressed_size; | |
376 | } | |
377 | ||
e4fbbfe9 | 378 | free(deflated); |
9cb513b7 | 379 | free(buffer); |
e4fbbfe9 | 380 | |
ebf5374a RS |
381 | memcpy(zip_dir + zip_dir_offset, &dirent, ZIP_DIR_HEADER_SIZE); |
382 | zip_dir_offset += ZIP_DIR_HEADER_SIZE; | |
383 | memcpy(zip_dir + zip_dir_offset, path, pathlen); | |
384 | zip_dir_offset += pathlen; | |
385 | zip_dir_entries++; | |
386 | ||
562e25ab | 387 | return 0; |
e4fbbfe9 RS |
388 | } |
389 | ||
390 | static void write_zip_trailer(const unsigned char *sha1) | |
391 | { | |
392 | struct zip_dir_trailer trailer; | |
393 | ||
394 | copy_le32(trailer.magic, 0x06054b50); | |
395 | copy_le16(trailer.disk, 0); | |
396 | copy_le16(trailer.directory_start_disk, 0); | |
397 | copy_le16(trailer.entries_on_this_disk, zip_dir_entries); | |
398 | copy_le16(trailer.entries, zip_dir_entries); | |
399 | copy_le32(trailer.size, zip_dir_offset); | |
400 | copy_le32(trailer.offset, zip_offset); | |
401 | copy_le16(trailer.comment_length, sha1 ? 40 : 0); | |
402 | ||
403 | write_or_die(1, zip_dir, zip_dir_offset); | |
0ea865ce | 404 | write_or_die(1, &trailer, ZIP_DIR_TRAILER_SIZE); |
e4fbbfe9 RS |
405 | if (sha1) |
406 | write_or_die(1, sha1_to_hex(sha1), 40); | |
407 | } | |
408 | ||
409 | static void dos_time(time_t *time, int *dos_date, int *dos_time) | |
410 | { | |
411 | struct tm *t = localtime(time); | |
412 | ||
413 | *dos_date = t->tm_mday + (t->tm_mon + 1) * 32 + | |
414 | (t->tm_year + 1900 - 1980) * 512; | |
415 | *dos_time = t->tm_sec / 2 + t->tm_min * 32 + t->tm_hour * 2048; | |
416 | } | |
417 | ||
4d7c9898 JK |
418 | static int write_zip_archive(const struct archiver *ar, |
419 | struct archiver_args *args) | |
ec06bff5 | 420 | { |
562e25ab RS |
421 | int err; |
422 | ||
ec06bff5 FBH |
423 | dos_time(&args->time, &zip_date, &zip_time); |
424 | ||
425 | zip_dir = xmalloc(ZIP_DIRECTORY_MIN_SIZE); | |
426 | zip_dir_size = ZIP_DIRECTORY_MIN_SIZE; | |
562e25ab RS |
427 | |
428 | err = write_archive_entries(args, write_zip_entry); | |
429 | if (!err) | |
430 | write_zip_trailer(args->commit_sha1); | |
ec06bff5 FBH |
431 | |
432 | free(zip_dir); | |
433 | ||
562e25ab | 434 | return err; |
ec06bff5 | 435 | } |
13e0f88d JK |
436 | |
437 | static struct archiver zip_archiver = { | |
438 | "zip", | |
439 | write_zip_archive, | |
7b97730b | 440 | ARCHIVER_WANT_COMPRESSION_LEVELS|ARCHIVER_REMOTE |
13e0f88d JK |
441 | }; |
442 | ||
443 | void init_zip_archiver(void) | |
444 | { | |
445 | register_archiver(&zip_archiver); | |
446 | } |