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1 | /* | |
2 | * Copyright (c) 2006 Rene Scharfe | |
3 | */ | |
4 | #include "cache.h" | |
5 | #include "config.h" | |
6 | #include "archive.h" | |
7 | #include "streaming.h" | |
8 | #include "utf8.h" | |
9 | #include "userdiff.h" | |
10 | #include "xdiff-interface.h" | |
11 | ||
12 | static int zip_date; | |
13 | static int zip_time; | |
14 | ||
15 | /* We only care about the "buf" part here. */ | |
16 | static struct strbuf zip_dir; | |
17 | ||
18 | static uintmax_t zip_offset; | |
19 | static uint64_t zip_dir_entries; | |
20 | ||
21 | static unsigned int max_creator_version; | |
22 | ||
23 | #define ZIP_STREAM (1 << 3) | |
24 | #define ZIP_UTF8 (1 << 11) | |
25 | ||
26 | struct zip_local_header { | |
27 | unsigned char magic[4]; | |
28 | unsigned char version[2]; | |
29 | unsigned char flags[2]; | |
30 | unsigned char compression_method[2]; | |
31 | unsigned char mtime[2]; | |
32 | unsigned char mdate[2]; | |
33 | unsigned char crc32[4]; | |
34 | unsigned char compressed_size[4]; | |
35 | unsigned char size[4]; | |
36 | unsigned char filename_length[2]; | |
37 | unsigned char extra_length[2]; | |
38 | unsigned char _end[1]; | |
39 | }; | |
40 | ||
41 | struct zip_data_desc { | |
42 | unsigned char magic[4]; | |
43 | unsigned char crc32[4]; | |
44 | unsigned char compressed_size[4]; | |
45 | unsigned char size[4]; | |
46 | unsigned char _end[1]; | |
47 | }; | |
48 | ||
49 | struct zip64_data_desc { | |
50 | unsigned char magic[4]; | |
51 | unsigned char crc32[4]; | |
52 | unsigned char compressed_size[8]; | |
53 | unsigned char size[8]; | |
54 | unsigned char _end[1]; | |
55 | }; | |
56 | ||
57 | struct zip_dir_trailer { | |
58 | unsigned char magic[4]; | |
59 | unsigned char disk[2]; | |
60 | unsigned char directory_start_disk[2]; | |
61 | unsigned char entries_on_this_disk[2]; | |
62 | unsigned char entries[2]; | |
63 | unsigned char size[4]; | |
64 | unsigned char offset[4]; | |
65 | unsigned char comment_length[2]; | |
66 | unsigned char _end[1]; | |
67 | }; | |
68 | ||
69 | struct zip_extra_mtime { | |
70 | unsigned char magic[2]; | |
71 | unsigned char extra_size[2]; | |
72 | unsigned char flags[1]; | |
73 | unsigned char mtime[4]; | |
74 | unsigned char _end[1]; | |
75 | }; | |
76 | ||
77 | struct zip64_extra { | |
78 | unsigned char magic[2]; | |
79 | unsigned char extra_size[2]; | |
80 | unsigned char size[8]; | |
81 | unsigned char compressed_size[8]; | |
82 | unsigned char _end[1]; | |
83 | }; | |
84 | ||
85 | struct zip64_dir_trailer { | |
86 | unsigned char magic[4]; | |
87 | unsigned char record_size[8]; | |
88 | unsigned char creator_version[2]; | |
89 | unsigned char version[2]; | |
90 | unsigned char disk[4]; | |
91 | unsigned char directory_start_disk[4]; | |
92 | unsigned char entries_on_this_disk[8]; | |
93 | unsigned char entries[8]; | |
94 | unsigned char size[8]; | |
95 | unsigned char offset[8]; | |
96 | unsigned char _end[1]; | |
97 | }; | |
98 | ||
99 | struct zip64_dir_trailer_locator { | |
100 | unsigned char magic[4]; | |
101 | unsigned char disk[4]; | |
102 | unsigned char offset[8]; | |
103 | unsigned char number_of_disks[4]; | |
104 | unsigned char _end[1]; | |
105 | }; | |
106 | ||
107 | /* | |
108 | * On ARM, padding is added at the end of the struct, so a simple | |
109 | * sizeof(struct ...) reports two bytes more than the payload size | |
110 | * we're interested in. | |
111 | */ | |
112 | #define ZIP_LOCAL_HEADER_SIZE offsetof(struct zip_local_header, _end) | |
113 | #define ZIP_DATA_DESC_SIZE offsetof(struct zip_data_desc, _end) | |
114 | #define ZIP64_DATA_DESC_SIZE offsetof(struct zip64_data_desc, _end) | |
115 | #define ZIP_DIR_HEADER_SIZE offsetof(struct zip_dir_header, _end) | |
116 | #define ZIP_DIR_TRAILER_SIZE offsetof(struct zip_dir_trailer, _end) | |
117 | #define ZIP_EXTRA_MTIME_SIZE offsetof(struct zip_extra_mtime, _end) | |
118 | #define ZIP_EXTRA_MTIME_PAYLOAD_SIZE \ | |
119 | (ZIP_EXTRA_MTIME_SIZE - offsetof(struct zip_extra_mtime, flags)) | |
120 | #define ZIP64_EXTRA_SIZE offsetof(struct zip64_extra, _end) | |
121 | #define ZIP64_EXTRA_PAYLOAD_SIZE \ | |
122 | (ZIP64_EXTRA_SIZE - offsetof(struct zip64_extra, size)) | |
123 | #define ZIP64_DIR_TRAILER_SIZE offsetof(struct zip64_dir_trailer, _end) | |
124 | #define ZIP64_DIR_TRAILER_RECORD_SIZE \ | |
125 | (ZIP64_DIR_TRAILER_SIZE - \ | |
126 | offsetof(struct zip64_dir_trailer, creator_version)) | |
127 | #define ZIP64_DIR_TRAILER_LOCATOR_SIZE \ | |
128 | offsetof(struct zip64_dir_trailer_locator, _end) | |
129 | ||
130 | static void copy_le16(unsigned char *dest, unsigned int n) | |
131 | { | |
132 | dest[0] = 0xff & n; | |
133 | dest[1] = 0xff & (n >> 010); | |
134 | } | |
135 | ||
136 | static void copy_le32(unsigned char *dest, unsigned int n) | |
137 | { | |
138 | dest[0] = 0xff & n; | |
139 | dest[1] = 0xff & (n >> 010); | |
140 | dest[2] = 0xff & (n >> 020); | |
141 | dest[3] = 0xff & (n >> 030); | |
142 | } | |
143 | ||
144 | static void copy_le64(unsigned char *dest, uint64_t n) | |
145 | { | |
146 | dest[0] = 0xff & n; | |
147 | dest[1] = 0xff & (n >> 010); | |
148 | dest[2] = 0xff & (n >> 020); | |
149 | dest[3] = 0xff & (n >> 030); | |
150 | dest[4] = 0xff & (n >> 040); | |
151 | dest[5] = 0xff & (n >> 050); | |
152 | dest[6] = 0xff & (n >> 060); | |
153 | dest[7] = 0xff & (n >> 070); | |
154 | } | |
155 | ||
156 | static uint64_t clamp_max(uint64_t n, uint64_t max, int *clamped) | |
157 | { | |
158 | if (n <= max) | |
159 | return n; | |
160 | *clamped = 1; | |
161 | return max; | |
162 | } | |
163 | ||
164 | static void copy_le16_clamp(unsigned char *dest, uint64_t n, int *clamped) | |
165 | { | |
166 | copy_le16(dest, clamp_max(n, 0xffff, clamped)); | |
167 | } | |
168 | ||
169 | static void copy_le32_clamp(unsigned char *dest, uint64_t n, int *clamped) | |
170 | { | |
171 | copy_le32(dest, clamp_max(n, 0xffffffff, clamped)); | |
172 | } | |
173 | ||
174 | static int strbuf_add_le(struct strbuf *sb, size_t size, uintmax_t n) | |
175 | { | |
176 | while (size-- > 0) { | |
177 | strbuf_addch(sb, n & 0xff); | |
178 | n >>= 8; | |
179 | } | |
180 | return -!!n; | |
181 | } | |
182 | ||
183 | static uint32_t clamp32(uintmax_t n) | |
184 | { | |
185 | const uintmax_t max = 0xffffffff; | |
186 | return (n < max) ? n : max; | |
187 | } | |
188 | ||
189 | static void *zlib_deflate_raw(void *data, unsigned long size, | |
190 | int compression_level, | |
191 | unsigned long *compressed_size) | |
192 | { | |
193 | git_zstream stream; | |
194 | unsigned long maxsize; | |
195 | void *buffer; | |
196 | int result; | |
197 | ||
198 | git_deflate_init_raw(&stream, compression_level); | |
199 | maxsize = git_deflate_bound(&stream, size); | |
200 | buffer = xmalloc(maxsize); | |
201 | ||
202 | stream.next_in = data; | |
203 | stream.avail_in = size; | |
204 | stream.next_out = buffer; | |
205 | stream.avail_out = maxsize; | |
206 | ||
207 | do { | |
208 | result = git_deflate(&stream, Z_FINISH); | |
209 | } while (result == Z_OK); | |
210 | ||
211 | if (result != Z_STREAM_END) { | |
212 | free(buffer); | |
213 | return NULL; | |
214 | } | |
215 | ||
216 | git_deflate_end(&stream); | |
217 | *compressed_size = stream.total_out; | |
218 | ||
219 | return buffer; | |
220 | } | |
221 | ||
222 | static void write_zip_data_desc(unsigned long size, | |
223 | unsigned long compressed_size, | |
224 | unsigned long crc) | |
225 | { | |
226 | if (size >= 0xffffffff || compressed_size >= 0xffffffff) { | |
227 | struct zip64_data_desc trailer; | |
228 | copy_le32(trailer.magic, 0x08074b50); | |
229 | copy_le32(trailer.crc32, crc); | |
230 | copy_le64(trailer.compressed_size, compressed_size); | |
231 | copy_le64(trailer.size, size); | |
232 | write_or_die(1, &trailer, ZIP64_DATA_DESC_SIZE); | |
233 | zip_offset += ZIP64_DATA_DESC_SIZE; | |
234 | } else { | |
235 | struct zip_data_desc trailer; | |
236 | copy_le32(trailer.magic, 0x08074b50); | |
237 | copy_le32(trailer.crc32, crc); | |
238 | copy_le32(trailer.compressed_size, compressed_size); | |
239 | copy_le32(trailer.size, size); | |
240 | write_or_die(1, &trailer, ZIP_DATA_DESC_SIZE); | |
241 | zip_offset += ZIP_DATA_DESC_SIZE; | |
242 | } | |
243 | } | |
244 | ||
245 | static void set_zip_header_data_desc(struct zip_local_header *header, | |
246 | unsigned long size, | |
247 | unsigned long compressed_size, | |
248 | unsigned long crc) | |
249 | { | |
250 | copy_le32(header->crc32, crc); | |
251 | copy_le32(header->compressed_size, compressed_size); | |
252 | copy_le32(header->size, size); | |
253 | } | |
254 | ||
255 | static int has_only_ascii(const char *s) | |
256 | { | |
257 | for (;;) { | |
258 | int c = *s++; | |
259 | if (c == '\0') | |
260 | return 1; | |
261 | if (!isascii(c)) | |
262 | return 0; | |
263 | } | |
264 | } | |
265 | ||
266 | static int entry_is_binary(const char *path, const void *buffer, size_t size) | |
267 | { | |
268 | struct userdiff_driver *driver = userdiff_find_by_path(path); | |
269 | if (!driver) | |
270 | driver = userdiff_find_by_name("default"); | |
271 | if (driver->binary != -1) | |
272 | return driver->binary; | |
273 | return buffer_is_binary(buffer, size); | |
274 | } | |
275 | ||
276 | #define STREAM_BUFFER_SIZE (1024 * 16) | |
277 | ||
278 | static int write_zip_entry(struct archiver_args *args, | |
279 | const unsigned char *sha1, | |
280 | const char *path, size_t pathlen, | |
281 | unsigned int mode) | |
282 | { | |
283 | struct zip_local_header header; | |
284 | uintmax_t offset = zip_offset; | |
285 | struct zip_extra_mtime extra; | |
286 | struct zip64_extra extra64; | |
287 | size_t header_extra_size = ZIP_EXTRA_MTIME_SIZE; | |
288 | int need_zip64_extra = 0; | |
289 | unsigned long attr2; | |
290 | unsigned long compressed_size; | |
291 | unsigned long crc; | |
292 | int method; | |
293 | unsigned char *out; | |
294 | void *deflated = NULL; | |
295 | void *buffer; | |
296 | struct git_istream *stream = NULL; | |
297 | unsigned long flags = 0; | |
298 | unsigned long size; | |
299 | int is_binary = -1; | |
300 | const char *path_without_prefix = path + args->baselen; | |
301 | unsigned int creator_version = 0; | |
302 | unsigned int version_needed = 10; | |
303 | size_t zip_dir_extra_size = ZIP_EXTRA_MTIME_SIZE; | |
304 | size_t zip64_dir_extra_payload_size = 0; | |
305 | ||
306 | crc = crc32(0, NULL, 0); | |
307 | ||
308 | if (!has_only_ascii(path)) { | |
309 | if (is_utf8(path)) | |
310 | flags |= ZIP_UTF8; | |
311 | else | |
312 | warning("Path is not valid UTF-8: %s", path); | |
313 | } | |
314 | ||
315 | if (pathlen > 0xffff) { | |
316 | return error("path too long (%d chars, SHA1: %s): %s", | |
317 | (int)pathlen, sha1_to_hex(sha1), path); | |
318 | } | |
319 | ||
320 | if (S_ISDIR(mode) || S_ISGITLINK(mode)) { | |
321 | method = 0; | |
322 | attr2 = 16; | |
323 | out = NULL; | |
324 | size = 0; | |
325 | compressed_size = 0; | |
326 | buffer = NULL; | |
327 | } else if (S_ISREG(mode) || S_ISLNK(mode)) { | |
328 | enum object_type type = sha1_object_info(sha1, &size); | |
329 | ||
330 | method = 0; | |
331 | attr2 = S_ISLNK(mode) ? ((mode | 0777) << 16) : | |
332 | (mode & 0111) ? ((mode) << 16) : 0; | |
333 | if (S_ISLNK(mode) || (mode & 0111)) | |
334 | creator_version = 0x0317; | |
335 | if (S_ISREG(mode) && args->compression_level != 0 && size > 0) | |
336 | method = 8; | |
337 | ||
338 | if (S_ISREG(mode) && type == OBJ_BLOB && !args->convert && | |
339 | size > big_file_threshold) { | |
340 | stream = open_istream(sha1, &type, &size, NULL); | |
341 | if (!stream) | |
342 | return error("cannot stream blob %s", | |
343 | sha1_to_hex(sha1)); | |
344 | flags |= ZIP_STREAM; | |
345 | out = buffer = NULL; | |
346 | } else { | |
347 | buffer = sha1_file_to_archive(args, path, sha1, mode, | |
348 | &type, &size); | |
349 | if (!buffer) | |
350 | return error("cannot read %s", | |
351 | sha1_to_hex(sha1)); | |
352 | crc = crc32(crc, buffer, size); | |
353 | is_binary = entry_is_binary(path_without_prefix, | |
354 | buffer, size); | |
355 | out = buffer; | |
356 | } | |
357 | compressed_size = (method == 0) ? size : 0; | |
358 | } else { | |
359 | return error("unsupported file mode: 0%o (SHA1: %s)", mode, | |
360 | sha1_to_hex(sha1)); | |
361 | } | |
362 | ||
363 | if (creator_version > max_creator_version) | |
364 | max_creator_version = creator_version; | |
365 | ||
366 | if (buffer && method == 8) { | |
367 | out = deflated = zlib_deflate_raw(buffer, size, | |
368 | args->compression_level, | |
369 | &compressed_size); | |
370 | if (!out || compressed_size >= size) { | |
371 | out = buffer; | |
372 | method = 0; | |
373 | compressed_size = size; | |
374 | } | |
375 | } | |
376 | ||
377 | copy_le16(extra.magic, 0x5455); | |
378 | copy_le16(extra.extra_size, ZIP_EXTRA_MTIME_PAYLOAD_SIZE); | |
379 | extra.flags[0] = 1; /* just mtime */ | |
380 | copy_le32(extra.mtime, args->time); | |
381 | ||
382 | if (size > 0xffffffff || compressed_size > 0xffffffff) | |
383 | need_zip64_extra = 1; | |
384 | if (stream && size > 0x7fffffff) | |
385 | need_zip64_extra = 1; | |
386 | ||
387 | if (need_zip64_extra) | |
388 | version_needed = 45; | |
389 | ||
390 | copy_le32(header.magic, 0x04034b50); | |
391 | copy_le16(header.version, version_needed); | |
392 | copy_le16(header.flags, flags); | |
393 | copy_le16(header.compression_method, method); | |
394 | copy_le16(header.mtime, zip_time); | |
395 | copy_le16(header.mdate, zip_date); | |
396 | if (need_zip64_extra) { | |
397 | set_zip_header_data_desc(&header, 0xffffffff, 0xffffffff, crc); | |
398 | header_extra_size += ZIP64_EXTRA_SIZE; | |
399 | } else { | |
400 | set_zip_header_data_desc(&header, size, compressed_size, crc); | |
401 | } | |
402 | copy_le16(header.filename_length, pathlen); | |
403 | copy_le16(header.extra_length, header_extra_size); | |
404 | write_or_die(1, &header, ZIP_LOCAL_HEADER_SIZE); | |
405 | zip_offset += ZIP_LOCAL_HEADER_SIZE; | |
406 | write_or_die(1, path, pathlen); | |
407 | zip_offset += pathlen; | |
408 | write_or_die(1, &extra, ZIP_EXTRA_MTIME_SIZE); | |
409 | zip_offset += ZIP_EXTRA_MTIME_SIZE; | |
410 | if (need_zip64_extra) { | |
411 | copy_le16(extra64.magic, 0x0001); | |
412 | copy_le16(extra64.extra_size, ZIP64_EXTRA_PAYLOAD_SIZE); | |
413 | copy_le64(extra64.size, size); | |
414 | copy_le64(extra64.compressed_size, compressed_size); | |
415 | write_or_die(1, &extra64, ZIP64_EXTRA_SIZE); | |
416 | zip_offset += ZIP64_EXTRA_SIZE; | |
417 | } | |
418 | ||
419 | if (stream && method == 0) { | |
420 | unsigned char buf[STREAM_BUFFER_SIZE]; | |
421 | ssize_t readlen; | |
422 | ||
423 | for (;;) { | |
424 | readlen = read_istream(stream, buf, sizeof(buf)); | |
425 | if (readlen <= 0) | |
426 | break; | |
427 | crc = crc32(crc, buf, readlen); | |
428 | if (is_binary == -1) | |
429 | is_binary = entry_is_binary(path_without_prefix, | |
430 | buf, readlen); | |
431 | write_or_die(1, buf, readlen); | |
432 | } | |
433 | close_istream(stream); | |
434 | if (readlen) | |
435 | return readlen; | |
436 | ||
437 | compressed_size = size; | |
438 | zip_offset += compressed_size; | |
439 | ||
440 | write_zip_data_desc(size, compressed_size, crc); | |
441 | } else if (stream && method == 8) { | |
442 | unsigned char buf[STREAM_BUFFER_SIZE]; | |
443 | ssize_t readlen; | |
444 | git_zstream zstream; | |
445 | int result; | |
446 | size_t out_len; | |
447 | unsigned char compressed[STREAM_BUFFER_SIZE * 2]; | |
448 | ||
449 | git_deflate_init_raw(&zstream, args->compression_level); | |
450 | ||
451 | compressed_size = 0; | |
452 | zstream.next_out = compressed; | |
453 | zstream.avail_out = sizeof(compressed); | |
454 | ||
455 | for (;;) { | |
456 | readlen = read_istream(stream, buf, sizeof(buf)); | |
457 | if (readlen <= 0) | |
458 | break; | |
459 | crc = crc32(crc, buf, readlen); | |
460 | if (is_binary == -1) | |
461 | is_binary = entry_is_binary(path_without_prefix, | |
462 | buf, readlen); | |
463 | ||
464 | zstream.next_in = buf; | |
465 | zstream.avail_in = readlen; | |
466 | result = git_deflate(&zstream, 0); | |
467 | if (result != Z_OK) | |
468 | die("deflate error (%d)", result); | |
469 | out_len = zstream.next_out - compressed; | |
470 | ||
471 | if (out_len > 0) { | |
472 | write_or_die(1, compressed, out_len); | |
473 | compressed_size += out_len; | |
474 | zstream.next_out = compressed; | |
475 | zstream.avail_out = sizeof(compressed); | |
476 | } | |
477 | ||
478 | } | |
479 | close_istream(stream); | |
480 | if (readlen) | |
481 | return readlen; | |
482 | ||
483 | zstream.next_in = buf; | |
484 | zstream.avail_in = 0; | |
485 | result = git_deflate(&zstream, Z_FINISH); | |
486 | if (result != Z_STREAM_END) | |
487 | die("deflate error (%d)", result); | |
488 | ||
489 | git_deflate_end(&zstream); | |
490 | out_len = zstream.next_out - compressed; | |
491 | write_or_die(1, compressed, out_len); | |
492 | compressed_size += out_len; | |
493 | zip_offset += compressed_size; | |
494 | ||
495 | write_zip_data_desc(size, compressed_size, crc); | |
496 | } else if (compressed_size > 0) { | |
497 | write_or_die(1, out, compressed_size); | |
498 | zip_offset += compressed_size; | |
499 | } | |
500 | ||
501 | free(deflated); | |
502 | free(buffer); | |
503 | ||
504 | if (compressed_size > 0xffffffff || size > 0xffffffff || | |
505 | offset > 0xffffffff) { | |
506 | if (compressed_size >= 0xffffffff) | |
507 | zip64_dir_extra_payload_size += 8; | |
508 | if (size >= 0xffffffff) | |
509 | zip64_dir_extra_payload_size += 8; | |
510 | if (offset >= 0xffffffff) | |
511 | zip64_dir_extra_payload_size += 8; | |
512 | zip_dir_extra_size += 2 + 2 + zip64_dir_extra_payload_size; | |
513 | } | |
514 | ||
515 | strbuf_add_le(&zip_dir, 4, 0x02014b50); /* magic */ | |
516 | strbuf_add_le(&zip_dir, 2, creator_version); | |
517 | strbuf_add_le(&zip_dir, 2, version_needed); | |
518 | strbuf_add_le(&zip_dir, 2, flags); | |
519 | strbuf_add_le(&zip_dir, 2, method); | |
520 | strbuf_add_le(&zip_dir, 2, zip_time); | |
521 | strbuf_add_le(&zip_dir, 2, zip_date); | |
522 | strbuf_add_le(&zip_dir, 4, crc); | |
523 | strbuf_add_le(&zip_dir, 4, clamp32(compressed_size)); | |
524 | strbuf_add_le(&zip_dir, 4, clamp32(size)); | |
525 | strbuf_add_le(&zip_dir, 2, pathlen); | |
526 | strbuf_add_le(&zip_dir, 2, zip_dir_extra_size); | |
527 | strbuf_add_le(&zip_dir, 2, 0); /* comment length */ | |
528 | strbuf_add_le(&zip_dir, 2, 0); /* disk */ | |
529 | strbuf_add_le(&zip_dir, 2, !is_binary); | |
530 | strbuf_add_le(&zip_dir, 4, attr2); | |
531 | strbuf_add_le(&zip_dir, 4, clamp32(offset)); | |
532 | strbuf_add(&zip_dir, path, pathlen); | |
533 | strbuf_add(&zip_dir, &extra, ZIP_EXTRA_MTIME_SIZE); | |
534 | if (zip64_dir_extra_payload_size) { | |
535 | strbuf_add_le(&zip_dir, 2, 0x0001); /* magic */ | |
536 | strbuf_add_le(&zip_dir, 2, zip64_dir_extra_payload_size); | |
537 | if (size >= 0xffffffff) | |
538 | strbuf_add_le(&zip_dir, 8, size); | |
539 | if (compressed_size >= 0xffffffff) | |
540 | strbuf_add_le(&zip_dir, 8, compressed_size); | |
541 | if (offset >= 0xffffffff) | |
542 | strbuf_add_le(&zip_dir, 8, offset); | |
543 | } | |
544 | zip_dir_entries++; | |
545 | ||
546 | return 0; | |
547 | } | |
548 | ||
549 | static void write_zip64_trailer(void) | |
550 | { | |
551 | struct zip64_dir_trailer trailer64; | |
552 | struct zip64_dir_trailer_locator locator64; | |
553 | ||
554 | copy_le32(trailer64.magic, 0x06064b50); | |
555 | copy_le64(trailer64.record_size, ZIP64_DIR_TRAILER_RECORD_SIZE); | |
556 | copy_le16(trailer64.creator_version, max_creator_version); | |
557 | copy_le16(trailer64.version, 45); | |
558 | copy_le32(trailer64.disk, 0); | |
559 | copy_le32(trailer64.directory_start_disk, 0); | |
560 | copy_le64(trailer64.entries_on_this_disk, zip_dir_entries); | |
561 | copy_le64(trailer64.entries, zip_dir_entries); | |
562 | copy_le64(trailer64.size, zip_dir.len); | |
563 | copy_le64(trailer64.offset, zip_offset); | |
564 | ||
565 | copy_le32(locator64.magic, 0x07064b50); | |
566 | copy_le32(locator64.disk, 0); | |
567 | copy_le64(locator64.offset, zip_offset + zip_dir.len); | |
568 | copy_le32(locator64.number_of_disks, 1); | |
569 | ||
570 | write_or_die(1, &trailer64, ZIP64_DIR_TRAILER_SIZE); | |
571 | write_or_die(1, &locator64, ZIP64_DIR_TRAILER_LOCATOR_SIZE); | |
572 | } | |
573 | ||
574 | static void write_zip_trailer(const unsigned char *sha1) | |
575 | { | |
576 | struct zip_dir_trailer trailer; | |
577 | int clamped = 0; | |
578 | ||
579 | copy_le32(trailer.magic, 0x06054b50); | |
580 | copy_le16(trailer.disk, 0); | |
581 | copy_le16(trailer.directory_start_disk, 0); | |
582 | copy_le16_clamp(trailer.entries_on_this_disk, zip_dir_entries, | |
583 | &clamped); | |
584 | copy_le16_clamp(trailer.entries, zip_dir_entries, &clamped); | |
585 | copy_le32(trailer.size, zip_dir.len); | |
586 | copy_le32_clamp(trailer.offset, zip_offset, &clamped); | |
587 | copy_le16(trailer.comment_length, sha1 ? GIT_SHA1_HEXSZ : 0); | |
588 | ||
589 | write_or_die(1, zip_dir.buf, zip_dir.len); | |
590 | if (clamped) | |
591 | write_zip64_trailer(); | |
592 | write_or_die(1, &trailer, ZIP_DIR_TRAILER_SIZE); | |
593 | if (sha1) | |
594 | write_or_die(1, sha1_to_hex(sha1), GIT_SHA1_HEXSZ); | |
595 | } | |
596 | ||
597 | static void dos_time(timestamp_t *timestamp, int *dos_date, int *dos_time) | |
598 | { | |
599 | time_t time; | |
600 | struct tm *t; | |
601 | ||
602 | if (date_overflows(*timestamp)) | |
603 | die("timestamp too large for this system: %"PRItime, | |
604 | *timestamp); | |
605 | time = (time_t)*timestamp; | |
606 | t = localtime(&time); | |
607 | *timestamp = time; | |
608 | ||
609 | *dos_date = t->tm_mday + (t->tm_mon + 1) * 32 + | |
610 | (t->tm_year + 1900 - 1980) * 512; | |
611 | *dos_time = t->tm_sec / 2 + t->tm_min * 32 + t->tm_hour * 2048; | |
612 | } | |
613 | ||
614 | static int archive_zip_config(const char *var, const char *value, void *data) | |
615 | { | |
616 | return userdiff_config(var, value); | |
617 | } | |
618 | ||
619 | static int write_zip_archive(const struct archiver *ar, | |
620 | struct archiver_args *args) | |
621 | { | |
622 | int err; | |
623 | ||
624 | git_config(archive_zip_config, NULL); | |
625 | ||
626 | dos_time(&args->time, &zip_date, &zip_time); | |
627 | ||
628 | strbuf_init(&zip_dir, 0); | |
629 | ||
630 | err = write_archive_entries(args, write_zip_entry); | |
631 | if (!err) | |
632 | write_zip_trailer(args->commit_sha1); | |
633 | ||
634 | strbuf_release(&zip_dir); | |
635 | ||
636 | return err; | |
637 | } | |
638 | ||
639 | static struct archiver zip_archiver = { | |
640 | "zip", | |
641 | write_zip_archive, | |
642 | ARCHIVER_WANT_COMPRESSION_LEVELS|ARCHIVER_REMOTE | |
643 | }; | |
644 | ||
645 | void init_zip_archiver(void) | |
646 | { | |
647 | register_archiver(&zip_archiver); | |
648 | } |