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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 "object-store.h" | |
10 | #include "userdiff.h" | |
11 | #include "xdiff-interface.h" | |
12 | ||
13 | static int zip_date; | |
14 | static int zip_time; | |
15 | ||
16 | /* We only care about the "buf" part here. */ | |
17 | static struct strbuf zip_dir; | |
18 | ||
19 | static uintmax_t zip_offset; | |
20 | static uint64_t zip_dir_entries; | |
21 | ||
22 | static unsigned int max_creator_version; | |
23 | ||
24 | #define ZIP_STREAM (1 << 3) | |
25 | #define ZIP_UTF8 (1 << 11) | |
26 | ||
27 | struct zip_local_header { | |
28 | unsigned char magic[4]; | |
29 | unsigned char version[2]; | |
30 | unsigned char flags[2]; | |
31 | unsigned char compression_method[2]; | |
32 | unsigned char mtime[2]; | |
33 | unsigned char mdate[2]; | |
34 | unsigned char crc32[4]; | |
35 | unsigned char compressed_size[4]; | |
36 | unsigned char size[4]; | |
37 | unsigned char filename_length[2]; | |
38 | unsigned char extra_length[2]; | |
39 | unsigned char _end[1]; | |
40 | }; | |
41 | ||
42 | struct zip_data_desc { | |
43 | unsigned char magic[4]; | |
44 | unsigned char crc32[4]; | |
45 | unsigned char compressed_size[4]; | |
46 | unsigned char size[4]; | |
47 | unsigned char _end[1]; | |
48 | }; | |
49 | ||
50 | struct zip64_data_desc { | |
51 | unsigned char magic[4]; | |
52 | unsigned char crc32[4]; | |
53 | unsigned char compressed_size[8]; | |
54 | unsigned char size[8]; | |
55 | unsigned char _end[1]; | |
56 | }; | |
57 | ||
58 | struct zip_dir_trailer { | |
59 | unsigned char magic[4]; | |
60 | unsigned char disk[2]; | |
61 | unsigned char directory_start_disk[2]; | |
62 | unsigned char entries_on_this_disk[2]; | |
63 | unsigned char entries[2]; | |
64 | unsigned char size[4]; | |
65 | unsigned char offset[4]; | |
66 | unsigned char comment_length[2]; | |
67 | unsigned char _end[1]; | |
68 | }; | |
69 | ||
70 | struct zip_extra_mtime { | |
71 | unsigned char magic[2]; | |
72 | unsigned char extra_size[2]; | |
73 | unsigned char flags[1]; | |
74 | unsigned char mtime[4]; | |
75 | unsigned char _end[1]; | |
76 | }; | |
77 | ||
78 | struct zip64_extra { | |
79 | unsigned char magic[2]; | |
80 | unsigned char extra_size[2]; | |
81 | unsigned char size[8]; | |
82 | unsigned char compressed_size[8]; | |
83 | unsigned char _end[1]; | |
84 | }; | |
85 | ||
86 | struct zip64_dir_trailer { | |
87 | unsigned char magic[4]; | |
88 | unsigned char record_size[8]; | |
89 | unsigned char creator_version[2]; | |
90 | unsigned char version[2]; | |
91 | unsigned char disk[4]; | |
92 | unsigned char directory_start_disk[4]; | |
93 | unsigned char entries_on_this_disk[8]; | |
94 | unsigned char entries[8]; | |
95 | unsigned char size[8]; | |
96 | unsigned char offset[8]; | |
97 | unsigned char _end[1]; | |
98 | }; | |
99 | ||
100 | struct zip64_dir_trailer_locator { | |
101 | unsigned char magic[4]; | |
102 | unsigned char disk[4]; | |
103 | unsigned char offset[8]; | |
104 | unsigned char number_of_disks[4]; | |
105 | unsigned char _end[1]; | |
106 | }; | |
107 | ||
108 | /* | |
109 | * On ARM, padding is added at the end of the struct, so a simple | |
110 | * sizeof(struct ...) reports two bytes more than the payload size | |
111 | * we're interested in. | |
112 | */ | |
113 | #define ZIP_LOCAL_HEADER_SIZE offsetof(struct zip_local_header, _end) | |
114 | #define ZIP_DATA_DESC_SIZE offsetof(struct zip_data_desc, _end) | |
115 | #define ZIP64_DATA_DESC_SIZE offsetof(struct zip64_data_desc, _end) | |
116 | #define ZIP_DIR_HEADER_SIZE offsetof(struct zip_dir_header, _end) | |
117 | #define ZIP_DIR_TRAILER_SIZE offsetof(struct zip_dir_trailer, _end) | |
118 | #define ZIP_EXTRA_MTIME_SIZE offsetof(struct zip_extra_mtime, _end) | |
119 | #define ZIP_EXTRA_MTIME_PAYLOAD_SIZE \ | |
120 | (ZIP_EXTRA_MTIME_SIZE - offsetof(struct zip_extra_mtime, flags)) | |
121 | #define ZIP64_EXTRA_SIZE offsetof(struct zip64_extra, _end) | |
122 | #define ZIP64_EXTRA_PAYLOAD_SIZE \ | |
123 | (ZIP64_EXTRA_SIZE - offsetof(struct zip64_extra, size)) | |
124 | #define ZIP64_DIR_TRAILER_SIZE offsetof(struct zip64_dir_trailer, _end) | |
125 | #define ZIP64_DIR_TRAILER_RECORD_SIZE \ | |
126 | (ZIP64_DIR_TRAILER_SIZE - \ | |
127 | offsetof(struct zip64_dir_trailer, creator_version)) | |
128 | #define ZIP64_DIR_TRAILER_LOCATOR_SIZE \ | |
129 | offsetof(struct zip64_dir_trailer_locator, _end) | |
130 | ||
131 | static void copy_le16(unsigned char *dest, unsigned int n) | |
132 | { | |
133 | dest[0] = 0xff & n; | |
134 | dest[1] = 0xff & (n >> 010); | |
135 | } | |
136 | ||
137 | static void copy_le32(unsigned char *dest, unsigned int n) | |
138 | { | |
139 | dest[0] = 0xff & n; | |
140 | dest[1] = 0xff & (n >> 010); | |
141 | dest[2] = 0xff & (n >> 020); | |
142 | dest[3] = 0xff & (n >> 030); | |
143 | } | |
144 | ||
145 | static void copy_le64(unsigned char *dest, uint64_t n) | |
146 | { | |
147 | dest[0] = 0xff & n; | |
148 | dest[1] = 0xff & (n >> 010); | |
149 | dest[2] = 0xff & (n >> 020); | |
150 | dest[3] = 0xff & (n >> 030); | |
151 | dest[4] = 0xff & (n >> 040); | |
152 | dest[5] = 0xff & (n >> 050); | |
153 | dest[6] = 0xff & (n >> 060); | |
154 | dest[7] = 0xff & (n >> 070); | |
155 | } | |
156 | ||
157 | static uint64_t clamp_max(uint64_t n, uint64_t max, int *clamped) | |
158 | { | |
159 | if (n <= max) | |
160 | return n; | |
161 | *clamped = 1; | |
162 | return max; | |
163 | } | |
164 | ||
165 | static void copy_le16_clamp(unsigned char *dest, uint64_t n, int *clamped) | |
166 | { | |
167 | copy_le16(dest, clamp_max(n, 0xffff, clamped)); | |
168 | } | |
169 | ||
170 | static void copy_le32_clamp(unsigned char *dest, uint64_t n, int *clamped) | |
171 | { | |
172 | copy_le32(dest, clamp_max(n, 0xffffffff, clamped)); | |
173 | } | |
174 | ||
175 | static int strbuf_add_le(struct strbuf *sb, size_t size, uintmax_t n) | |
176 | { | |
177 | while (size-- > 0) { | |
178 | strbuf_addch(sb, n & 0xff); | |
179 | n >>= 8; | |
180 | } | |
181 | return -!!n; | |
182 | } | |
183 | ||
184 | static uint32_t clamp32(uintmax_t n) | |
185 | { | |
186 | const uintmax_t max = 0xffffffff; | |
187 | return (n < max) ? n : max; | |
188 | } | |
189 | ||
190 | static void *zlib_deflate_raw(void *data, unsigned long size, | |
191 | int compression_level, | |
192 | unsigned long *compressed_size) | |
193 | { | |
194 | git_zstream stream; | |
195 | unsigned long maxsize; | |
196 | void *buffer; | |
197 | int result; | |
198 | ||
199 | git_deflate_init_raw(&stream, compression_level); | |
200 | maxsize = git_deflate_bound(&stream, size); | |
201 | buffer = xmalloc(maxsize); | |
202 | ||
203 | stream.next_in = data; | |
204 | stream.avail_in = size; | |
205 | stream.next_out = buffer; | |
206 | stream.avail_out = maxsize; | |
207 | ||
208 | do { | |
209 | result = git_deflate(&stream, Z_FINISH); | |
210 | } while (result == Z_OK); | |
211 | ||
212 | if (result != Z_STREAM_END) { | |
213 | free(buffer); | |
214 | return NULL; | |
215 | } | |
216 | ||
217 | git_deflate_end(&stream); | |
218 | *compressed_size = stream.total_out; | |
219 | ||
220 | return buffer; | |
221 | } | |
222 | ||
223 | static void write_zip_data_desc(unsigned long size, | |
224 | unsigned long compressed_size, | |
225 | unsigned long crc) | |
226 | { | |
227 | if (size >= 0xffffffff || compressed_size >= 0xffffffff) { | |
228 | struct zip64_data_desc trailer; | |
229 | copy_le32(trailer.magic, 0x08074b50); | |
230 | copy_le32(trailer.crc32, crc); | |
231 | copy_le64(trailer.compressed_size, compressed_size); | |
232 | copy_le64(trailer.size, size); | |
233 | write_or_die(1, &trailer, ZIP64_DATA_DESC_SIZE); | |
234 | zip_offset += ZIP64_DATA_DESC_SIZE; | |
235 | } else { | |
236 | struct zip_data_desc trailer; | |
237 | copy_le32(trailer.magic, 0x08074b50); | |
238 | copy_le32(trailer.crc32, crc); | |
239 | copy_le32(trailer.compressed_size, compressed_size); | |
240 | copy_le32(trailer.size, size); | |
241 | write_or_die(1, &trailer, ZIP_DATA_DESC_SIZE); | |
242 | zip_offset += ZIP_DATA_DESC_SIZE; | |
243 | } | |
244 | } | |
245 | ||
246 | static void set_zip_header_data_desc(struct zip_local_header *header, | |
247 | unsigned long size, | |
248 | unsigned long compressed_size, | |
249 | unsigned long crc) | |
250 | { | |
251 | copy_le32(header->crc32, crc); | |
252 | copy_le32(header->compressed_size, compressed_size); | |
253 | copy_le32(header->size, size); | |
254 | } | |
255 | ||
256 | static int has_only_ascii(const char *s) | |
257 | { | |
258 | for (;;) { | |
259 | int c = *s++; | |
260 | if (c == '\0') | |
261 | return 1; | |
262 | if (!isascii(c)) | |
263 | return 0; | |
264 | } | |
265 | } | |
266 | ||
267 | static int entry_is_binary(struct index_state *istate, const char *path, | |
268 | const void *buffer, size_t size) | |
269 | { | |
270 | struct userdiff_driver *driver = userdiff_find_by_path(istate, path); | |
271 | if (!driver) | |
272 | driver = userdiff_find_by_name("default"); | |
273 | if (driver->binary != -1) | |
274 | return driver->binary; | |
275 | return buffer_is_binary(buffer, size); | |
276 | } | |
277 | ||
278 | #define STREAM_BUFFER_SIZE (1024 * 16) | |
279 | ||
280 | static int write_zip_entry(struct archiver_args *args, | |
281 | const struct object_id *oid, | |
282 | const char *path, size_t pathlen, | |
283 | unsigned int mode) | |
284 | { | |
285 | struct zip_local_header header; | |
286 | uintmax_t offset = zip_offset; | |
287 | struct zip_extra_mtime extra; | |
288 | struct zip64_extra extra64; | |
289 | size_t header_extra_size = ZIP_EXTRA_MTIME_SIZE; | |
290 | int need_zip64_extra = 0; | |
291 | unsigned long attr2; | |
292 | unsigned long compressed_size; | |
293 | unsigned long crc; | |
294 | int method; | |
295 | unsigned char *out; | |
296 | void *deflated = NULL; | |
297 | void *buffer; | |
298 | struct git_istream *stream = NULL; | |
299 | unsigned long flags = 0; | |
300 | unsigned long size; | |
301 | int is_binary = -1; | |
302 | const char *path_without_prefix = path + args->baselen; | |
303 | unsigned int creator_version = 0; | |
304 | unsigned int version_needed = 10; | |
305 | size_t zip_dir_extra_size = ZIP_EXTRA_MTIME_SIZE; | |
306 | size_t zip64_dir_extra_payload_size = 0; | |
307 | ||
308 | crc = crc32(0, NULL, 0); | |
309 | ||
310 | if (!has_only_ascii(path)) { | |
311 | if (is_utf8(path)) | |
312 | flags |= ZIP_UTF8; | |
313 | else | |
314 | warning(_("path is not valid UTF-8: %s"), path); | |
315 | } | |
316 | ||
317 | if (pathlen > 0xffff) { | |
318 | return error(_("path too long (%d chars, SHA1: %s): %s"), | |
319 | (int)pathlen, oid_to_hex(oid), path); | |
320 | } | |
321 | ||
322 | if (S_ISDIR(mode) || S_ISGITLINK(mode)) { | |
323 | method = 0; | |
324 | attr2 = 16; | |
325 | out = NULL; | |
326 | size = 0; | |
327 | compressed_size = 0; | |
328 | buffer = NULL; | |
329 | } else if (S_ISREG(mode) || S_ISLNK(mode)) { | |
330 | enum object_type type = oid_object_info(args->repo, oid, | |
331 | &size); | |
332 | ||
333 | method = 0; | |
334 | attr2 = S_ISLNK(mode) ? ((mode | 0777) << 16) : | |
335 | (mode & 0111) ? ((mode) << 16) : 0; | |
336 | if (S_ISLNK(mode) || (mode & 0111)) | |
337 | creator_version = 0x0317; | |
338 | if (S_ISREG(mode) && args->compression_level != 0 && size > 0) | |
339 | method = 8; | |
340 | ||
341 | if (S_ISREG(mode) && type == OBJ_BLOB && !args->convert && | |
342 | size > big_file_threshold) { | |
343 | stream = open_istream(oid, &type, &size, NULL); | |
344 | if (!stream) | |
345 | return error(_("cannot stream blob %s"), | |
346 | oid_to_hex(oid)); | |
347 | flags |= ZIP_STREAM; | |
348 | out = buffer = NULL; | |
349 | } else { | |
350 | buffer = object_file_to_archive(args, path, oid, mode, | |
351 | &type, &size); | |
352 | if (!buffer) | |
353 | return error(_("cannot read %s"), | |
354 | oid_to_hex(oid)); | |
355 | crc = crc32(crc, buffer, size); | |
356 | is_binary = entry_is_binary(args->repo->index, | |
357 | path_without_prefix, | |
358 | buffer, size); | |
359 | out = buffer; | |
360 | } | |
361 | compressed_size = (method == 0) ? size : 0; | |
362 | } else { | |
363 | return error(_("unsupported file mode: 0%o (SHA1: %s)"), mode, | |
364 | oid_to_hex(oid)); | |
365 | } | |
366 | ||
367 | if (creator_version > max_creator_version) | |
368 | max_creator_version = creator_version; | |
369 | ||
370 | if (buffer && method == 8) { | |
371 | out = deflated = zlib_deflate_raw(buffer, size, | |
372 | args->compression_level, | |
373 | &compressed_size); | |
374 | if (!out || compressed_size >= size) { | |
375 | out = buffer; | |
376 | method = 0; | |
377 | compressed_size = size; | |
378 | } | |
379 | } | |
380 | ||
381 | copy_le16(extra.magic, 0x5455); | |
382 | copy_le16(extra.extra_size, ZIP_EXTRA_MTIME_PAYLOAD_SIZE); | |
383 | extra.flags[0] = 1; /* just mtime */ | |
384 | copy_le32(extra.mtime, args->time); | |
385 | ||
386 | if (size > 0xffffffff || compressed_size > 0xffffffff) | |
387 | need_zip64_extra = 1; | |
388 | if (stream && size > 0x7fffffff) | |
389 | need_zip64_extra = 1; | |
390 | ||
391 | if (need_zip64_extra) | |
392 | version_needed = 45; | |
393 | ||
394 | copy_le32(header.magic, 0x04034b50); | |
395 | copy_le16(header.version, version_needed); | |
396 | copy_le16(header.flags, flags); | |
397 | copy_le16(header.compression_method, method); | |
398 | copy_le16(header.mtime, zip_time); | |
399 | copy_le16(header.mdate, zip_date); | |
400 | if (need_zip64_extra) { | |
401 | set_zip_header_data_desc(&header, 0xffffffff, 0xffffffff, crc); | |
402 | header_extra_size += ZIP64_EXTRA_SIZE; | |
403 | } else { | |
404 | set_zip_header_data_desc(&header, size, compressed_size, crc); | |
405 | } | |
406 | copy_le16(header.filename_length, pathlen); | |
407 | copy_le16(header.extra_length, header_extra_size); | |
408 | write_or_die(1, &header, ZIP_LOCAL_HEADER_SIZE); | |
409 | zip_offset += ZIP_LOCAL_HEADER_SIZE; | |
410 | write_or_die(1, path, pathlen); | |
411 | zip_offset += pathlen; | |
412 | write_or_die(1, &extra, ZIP_EXTRA_MTIME_SIZE); | |
413 | zip_offset += ZIP_EXTRA_MTIME_SIZE; | |
414 | if (need_zip64_extra) { | |
415 | copy_le16(extra64.magic, 0x0001); | |
416 | copy_le16(extra64.extra_size, ZIP64_EXTRA_PAYLOAD_SIZE); | |
417 | copy_le64(extra64.size, size); | |
418 | copy_le64(extra64.compressed_size, compressed_size); | |
419 | write_or_die(1, &extra64, ZIP64_EXTRA_SIZE); | |
420 | zip_offset += ZIP64_EXTRA_SIZE; | |
421 | } | |
422 | ||
423 | if (stream && method == 0) { | |
424 | unsigned char buf[STREAM_BUFFER_SIZE]; | |
425 | ssize_t readlen; | |
426 | ||
427 | for (;;) { | |
428 | readlen = read_istream(stream, buf, sizeof(buf)); | |
429 | if (readlen <= 0) | |
430 | break; | |
431 | crc = crc32(crc, buf, readlen); | |
432 | if (is_binary == -1) | |
433 | is_binary = entry_is_binary(args->repo->index, | |
434 | path_without_prefix, | |
435 | buf, readlen); | |
436 | write_or_die(1, buf, readlen); | |
437 | } | |
438 | close_istream(stream); | |
439 | if (readlen) | |
440 | return readlen; | |
441 | ||
442 | compressed_size = size; | |
443 | zip_offset += compressed_size; | |
444 | ||
445 | write_zip_data_desc(size, compressed_size, crc); | |
446 | } else if (stream && method == 8) { | |
447 | unsigned char buf[STREAM_BUFFER_SIZE]; | |
448 | ssize_t readlen; | |
449 | git_zstream zstream; | |
450 | int result; | |
451 | size_t out_len; | |
452 | unsigned char compressed[STREAM_BUFFER_SIZE * 2]; | |
453 | ||
454 | git_deflate_init_raw(&zstream, args->compression_level); | |
455 | ||
456 | compressed_size = 0; | |
457 | zstream.next_out = compressed; | |
458 | zstream.avail_out = sizeof(compressed); | |
459 | ||
460 | for (;;) { | |
461 | readlen = read_istream(stream, buf, sizeof(buf)); | |
462 | if (readlen <= 0) | |
463 | break; | |
464 | crc = crc32(crc, buf, readlen); | |
465 | if (is_binary == -1) | |
466 | is_binary = entry_is_binary(args->repo->index, | |
467 | path_without_prefix, | |
468 | buf, readlen); | |
469 | ||
470 | zstream.next_in = buf; | |
471 | zstream.avail_in = readlen; | |
472 | result = git_deflate(&zstream, 0); | |
473 | if (result != Z_OK) | |
474 | die(_("deflate error (%d)"), result); | |
475 | out_len = zstream.next_out - compressed; | |
476 | ||
477 | if (out_len > 0) { | |
478 | write_or_die(1, compressed, out_len); | |
479 | compressed_size += out_len; | |
480 | zstream.next_out = compressed; | |
481 | zstream.avail_out = sizeof(compressed); | |
482 | } | |
483 | ||
484 | } | |
485 | close_istream(stream); | |
486 | if (readlen) | |
487 | return readlen; | |
488 | ||
489 | zstream.next_in = buf; | |
490 | zstream.avail_in = 0; | |
491 | result = git_deflate(&zstream, Z_FINISH); | |
492 | if (result != Z_STREAM_END) | |
493 | die("deflate error (%d)", result); | |
494 | ||
495 | git_deflate_end(&zstream); | |
496 | out_len = zstream.next_out - compressed; | |
497 | write_or_die(1, compressed, out_len); | |
498 | compressed_size += out_len; | |
499 | zip_offset += compressed_size; | |
500 | ||
501 | write_zip_data_desc(size, compressed_size, crc); | |
502 | } else if (compressed_size > 0) { | |
503 | write_or_die(1, out, compressed_size); | |
504 | zip_offset += compressed_size; | |
505 | } | |
506 | ||
507 | free(deflated); | |
508 | free(buffer); | |
509 | ||
510 | if (compressed_size > 0xffffffff || size > 0xffffffff || | |
511 | offset > 0xffffffff) { | |
512 | if (compressed_size >= 0xffffffff) | |
513 | zip64_dir_extra_payload_size += 8; | |
514 | if (size >= 0xffffffff) | |
515 | zip64_dir_extra_payload_size += 8; | |
516 | if (offset >= 0xffffffff) | |
517 | zip64_dir_extra_payload_size += 8; | |
518 | zip_dir_extra_size += 2 + 2 + zip64_dir_extra_payload_size; | |
519 | } | |
520 | ||
521 | strbuf_add_le(&zip_dir, 4, 0x02014b50); /* magic */ | |
522 | strbuf_add_le(&zip_dir, 2, creator_version); | |
523 | strbuf_add_le(&zip_dir, 2, version_needed); | |
524 | strbuf_add_le(&zip_dir, 2, flags); | |
525 | strbuf_add_le(&zip_dir, 2, method); | |
526 | strbuf_add_le(&zip_dir, 2, zip_time); | |
527 | strbuf_add_le(&zip_dir, 2, zip_date); | |
528 | strbuf_add_le(&zip_dir, 4, crc); | |
529 | strbuf_add_le(&zip_dir, 4, clamp32(compressed_size)); | |
530 | strbuf_add_le(&zip_dir, 4, clamp32(size)); | |
531 | strbuf_add_le(&zip_dir, 2, pathlen); | |
532 | strbuf_add_le(&zip_dir, 2, zip_dir_extra_size); | |
533 | strbuf_add_le(&zip_dir, 2, 0); /* comment length */ | |
534 | strbuf_add_le(&zip_dir, 2, 0); /* disk */ | |
535 | strbuf_add_le(&zip_dir, 2, !is_binary); | |
536 | strbuf_add_le(&zip_dir, 4, attr2); | |
537 | strbuf_add_le(&zip_dir, 4, clamp32(offset)); | |
538 | strbuf_add(&zip_dir, path, pathlen); | |
539 | strbuf_add(&zip_dir, &extra, ZIP_EXTRA_MTIME_SIZE); | |
540 | if (zip64_dir_extra_payload_size) { | |
541 | strbuf_add_le(&zip_dir, 2, 0x0001); /* magic */ | |
542 | strbuf_add_le(&zip_dir, 2, zip64_dir_extra_payload_size); | |
543 | if (size >= 0xffffffff) | |
544 | strbuf_add_le(&zip_dir, 8, size); | |
545 | if (compressed_size >= 0xffffffff) | |
546 | strbuf_add_le(&zip_dir, 8, compressed_size); | |
547 | if (offset >= 0xffffffff) | |
548 | strbuf_add_le(&zip_dir, 8, offset); | |
549 | } | |
550 | zip_dir_entries++; | |
551 | ||
552 | return 0; | |
553 | } | |
554 | ||
555 | static void write_zip64_trailer(void) | |
556 | { | |
557 | struct zip64_dir_trailer trailer64; | |
558 | struct zip64_dir_trailer_locator locator64; | |
559 | ||
560 | copy_le32(trailer64.magic, 0x06064b50); | |
561 | copy_le64(trailer64.record_size, ZIP64_DIR_TRAILER_RECORD_SIZE); | |
562 | copy_le16(trailer64.creator_version, max_creator_version); | |
563 | copy_le16(trailer64.version, 45); | |
564 | copy_le32(trailer64.disk, 0); | |
565 | copy_le32(trailer64.directory_start_disk, 0); | |
566 | copy_le64(trailer64.entries_on_this_disk, zip_dir_entries); | |
567 | copy_le64(trailer64.entries, zip_dir_entries); | |
568 | copy_le64(trailer64.size, zip_dir.len); | |
569 | copy_le64(trailer64.offset, zip_offset); | |
570 | ||
571 | copy_le32(locator64.magic, 0x07064b50); | |
572 | copy_le32(locator64.disk, 0); | |
573 | copy_le64(locator64.offset, zip_offset + zip_dir.len); | |
574 | copy_le32(locator64.number_of_disks, 1); | |
575 | ||
576 | write_or_die(1, &trailer64, ZIP64_DIR_TRAILER_SIZE); | |
577 | write_or_die(1, &locator64, ZIP64_DIR_TRAILER_LOCATOR_SIZE); | |
578 | } | |
579 | ||
580 | static void write_zip_trailer(const struct object_id *oid) | |
581 | { | |
582 | struct zip_dir_trailer trailer; | |
583 | int clamped = 0; | |
584 | ||
585 | copy_le32(trailer.magic, 0x06054b50); | |
586 | copy_le16(trailer.disk, 0); | |
587 | copy_le16(trailer.directory_start_disk, 0); | |
588 | copy_le16_clamp(trailer.entries_on_this_disk, zip_dir_entries, | |
589 | &clamped); | |
590 | copy_le16_clamp(trailer.entries, zip_dir_entries, &clamped); | |
591 | copy_le32(trailer.size, zip_dir.len); | |
592 | copy_le32_clamp(trailer.offset, zip_offset, &clamped); | |
593 | copy_le16(trailer.comment_length, oid ? the_hash_algo->hexsz : 0); | |
594 | ||
595 | write_or_die(1, zip_dir.buf, zip_dir.len); | |
596 | if (clamped) | |
597 | write_zip64_trailer(); | |
598 | write_or_die(1, &trailer, ZIP_DIR_TRAILER_SIZE); | |
599 | if (oid) | |
600 | write_or_die(1, oid_to_hex(oid), the_hash_algo->hexsz); | |
601 | } | |
602 | ||
603 | static void dos_time(timestamp_t *timestamp, int *dos_date, int *dos_time) | |
604 | { | |
605 | time_t time; | |
606 | struct tm *t; | |
607 | ||
608 | if (date_overflows(*timestamp)) | |
609 | die(_("timestamp too large for this system: %"PRItime), | |
610 | *timestamp); | |
611 | time = (time_t)*timestamp; | |
612 | t = localtime(&time); | |
613 | *timestamp = time; | |
614 | ||
615 | *dos_date = t->tm_mday + (t->tm_mon + 1) * 32 + | |
616 | (t->tm_year + 1900 - 1980) * 512; | |
617 | *dos_time = t->tm_sec / 2 + t->tm_min * 32 + t->tm_hour * 2048; | |
618 | } | |
619 | ||
620 | static int archive_zip_config(const char *var, const char *value, void *data) | |
621 | { | |
622 | return userdiff_config(var, value); | |
623 | } | |
624 | ||
625 | static int write_zip_archive(const struct archiver *ar, | |
626 | struct archiver_args *args) | |
627 | { | |
628 | int err; | |
629 | ||
630 | git_config(archive_zip_config, NULL); | |
631 | ||
632 | dos_time(&args->time, &zip_date, &zip_time); | |
633 | ||
634 | strbuf_init(&zip_dir, 0); | |
635 | ||
636 | err = write_archive_entries(args, write_zip_entry); | |
637 | if (!err) | |
638 | write_zip_trailer(args->commit_oid); | |
639 | ||
640 | strbuf_release(&zip_dir); | |
641 | ||
642 | return err; | |
643 | } | |
644 | ||
645 | static struct archiver zip_archiver = { | |
646 | "zip", | |
647 | write_zip_archive, | |
648 | ARCHIVER_WANT_COMPRESSION_LEVELS|ARCHIVER_REMOTE | |
649 | }; | |
650 | ||
651 | void init_zip_archiver(void) | |
652 | { | |
653 | register_archiver(&zip_archiver); | |
654 | } |