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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 | enum zip_method { | |
28 | ZIP_METHOD_STORE = 0, | |
29 | ZIP_METHOD_DEFLATE = 8 | |
30 | }; | |
31 | ||
32 | struct zip_local_header { | |
33 | unsigned char magic[4]; | |
34 | unsigned char version[2]; | |
35 | unsigned char flags[2]; | |
36 | unsigned char compression_method[2]; | |
37 | unsigned char mtime[2]; | |
38 | unsigned char mdate[2]; | |
39 | unsigned char crc32[4]; | |
40 | unsigned char compressed_size[4]; | |
41 | unsigned char size[4]; | |
42 | unsigned char filename_length[2]; | |
43 | unsigned char extra_length[2]; | |
44 | unsigned char _end[1]; | |
45 | }; | |
46 | ||
47 | struct zip_data_desc { | |
48 | unsigned char magic[4]; | |
49 | unsigned char crc32[4]; | |
50 | unsigned char compressed_size[4]; | |
51 | unsigned char size[4]; | |
52 | unsigned char _end[1]; | |
53 | }; | |
54 | ||
55 | struct zip64_data_desc { | |
56 | unsigned char magic[4]; | |
57 | unsigned char crc32[4]; | |
58 | unsigned char compressed_size[8]; | |
59 | unsigned char size[8]; | |
60 | unsigned char _end[1]; | |
61 | }; | |
62 | ||
63 | struct zip_dir_trailer { | |
64 | unsigned char magic[4]; | |
65 | unsigned char disk[2]; | |
66 | unsigned char directory_start_disk[2]; | |
67 | unsigned char entries_on_this_disk[2]; | |
68 | unsigned char entries[2]; | |
69 | unsigned char size[4]; | |
70 | unsigned char offset[4]; | |
71 | unsigned char comment_length[2]; | |
72 | unsigned char _end[1]; | |
73 | }; | |
74 | ||
75 | struct zip_extra_mtime { | |
76 | unsigned char magic[2]; | |
77 | unsigned char extra_size[2]; | |
78 | unsigned char flags[1]; | |
79 | unsigned char mtime[4]; | |
80 | unsigned char _end[1]; | |
81 | }; | |
82 | ||
83 | struct zip64_extra { | |
84 | unsigned char magic[2]; | |
85 | unsigned char extra_size[2]; | |
86 | unsigned char size[8]; | |
87 | unsigned char compressed_size[8]; | |
88 | unsigned char _end[1]; | |
89 | }; | |
90 | ||
91 | struct zip64_dir_trailer { | |
92 | unsigned char magic[4]; | |
93 | unsigned char record_size[8]; | |
94 | unsigned char creator_version[2]; | |
95 | unsigned char version[2]; | |
96 | unsigned char disk[4]; | |
97 | unsigned char directory_start_disk[4]; | |
98 | unsigned char entries_on_this_disk[8]; | |
99 | unsigned char entries[8]; | |
100 | unsigned char size[8]; | |
101 | unsigned char offset[8]; | |
102 | unsigned char _end[1]; | |
103 | }; | |
104 | ||
105 | struct zip64_dir_trailer_locator { | |
106 | unsigned char magic[4]; | |
107 | unsigned char disk[4]; | |
108 | unsigned char offset[8]; | |
109 | unsigned char number_of_disks[4]; | |
110 | unsigned char _end[1]; | |
111 | }; | |
112 | ||
113 | /* | |
114 | * On ARM, padding is added at the end of the struct, so a simple | |
115 | * sizeof(struct ...) reports two bytes more than the payload size | |
116 | * we're interested in. | |
117 | */ | |
118 | #define ZIP_LOCAL_HEADER_SIZE offsetof(struct zip_local_header, _end) | |
119 | #define ZIP_DATA_DESC_SIZE offsetof(struct zip_data_desc, _end) | |
120 | #define ZIP64_DATA_DESC_SIZE offsetof(struct zip64_data_desc, _end) | |
121 | #define ZIP_DIR_HEADER_SIZE offsetof(struct zip_dir_header, _end) | |
122 | #define ZIP_DIR_TRAILER_SIZE offsetof(struct zip_dir_trailer, _end) | |
123 | #define ZIP_EXTRA_MTIME_SIZE offsetof(struct zip_extra_mtime, _end) | |
124 | #define ZIP_EXTRA_MTIME_PAYLOAD_SIZE \ | |
125 | (ZIP_EXTRA_MTIME_SIZE - offsetof(struct zip_extra_mtime, flags)) | |
126 | #define ZIP64_EXTRA_SIZE offsetof(struct zip64_extra, _end) | |
127 | #define ZIP64_EXTRA_PAYLOAD_SIZE \ | |
128 | (ZIP64_EXTRA_SIZE - offsetof(struct zip64_extra, size)) | |
129 | #define ZIP64_DIR_TRAILER_SIZE offsetof(struct zip64_dir_trailer, _end) | |
130 | #define ZIP64_DIR_TRAILER_RECORD_SIZE \ | |
131 | (ZIP64_DIR_TRAILER_SIZE - \ | |
132 | offsetof(struct zip64_dir_trailer, creator_version)) | |
133 | #define ZIP64_DIR_TRAILER_LOCATOR_SIZE \ | |
134 | offsetof(struct zip64_dir_trailer_locator, _end) | |
135 | ||
136 | static void copy_le16(unsigned char *dest, unsigned int n) | |
137 | { | |
138 | dest[0] = 0xff & n; | |
139 | dest[1] = 0xff & (n >> 010); | |
140 | } | |
141 | ||
142 | static void copy_le32(unsigned char *dest, unsigned int n) | |
143 | { | |
144 | dest[0] = 0xff & n; | |
145 | dest[1] = 0xff & (n >> 010); | |
146 | dest[2] = 0xff & (n >> 020); | |
147 | dest[3] = 0xff & (n >> 030); | |
148 | } | |
149 | ||
150 | static void copy_le64(unsigned char *dest, uint64_t n) | |
151 | { | |
152 | dest[0] = 0xff & n; | |
153 | dest[1] = 0xff & (n >> 010); | |
154 | dest[2] = 0xff & (n >> 020); | |
155 | dest[3] = 0xff & (n >> 030); | |
156 | dest[4] = 0xff & (n >> 040); | |
157 | dest[5] = 0xff & (n >> 050); | |
158 | dest[6] = 0xff & (n >> 060); | |
159 | dest[7] = 0xff & (n >> 070); | |
160 | } | |
161 | ||
162 | static uint64_t clamp_max(uint64_t n, uint64_t max, int *clamped) | |
163 | { | |
164 | if (n <= max) | |
165 | return n; | |
166 | *clamped = 1; | |
167 | return max; | |
168 | } | |
169 | ||
170 | static void copy_le16_clamp(unsigned char *dest, uint64_t n, int *clamped) | |
171 | { | |
172 | copy_le16(dest, clamp_max(n, 0xffff, clamped)); | |
173 | } | |
174 | ||
175 | static void copy_le32_clamp(unsigned char *dest, uint64_t n, int *clamped) | |
176 | { | |
177 | copy_le32(dest, clamp_max(n, 0xffffffff, clamped)); | |
178 | } | |
179 | ||
180 | static int strbuf_add_le(struct strbuf *sb, size_t size, uintmax_t n) | |
181 | { | |
182 | while (size-- > 0) { | |
183 | strbuf_addch(sb, n & 0xff); | |
184 | n >>= 8; | |
185 | } | |
186 | return -!!n; | |
187 | } | |
188 | ||
189 | static uint32_t clamp32(uintmax_t n) | |
190 | { | |
191 | const uintmax_t max = 0xffffffff; | |
192 | return (n < max) ? n : max; | |
193 | } | |
194 | ||
195 | static void *zlib_deflate_raw(void *data, unsigned long size, | |
196 | int compression_level, | |
197 | unsigned long *compressed_size) | |
198 | { | |
199 | git_zstream stream; | |
200 | unsigned long maxsize; | |
201 | void *buffer; | |
202 | int result; | |
203 | ||
204 | git_deflate_init_raw(&stream, compression_level); | |
205 | maxsize = git_deflate_bound(&stream, size); | |
206 | buffer = xmalloc(maxsize); | |
207 | ||
208 | stream.next_in = data; | |
209 | stream.avail_in = size; | |
210 | stream.next_out = buffer; | |
211 | stream.avail_out = maxsize; | |
212 | ||
213 | do { | |
214 | result = git_deflate(&stream, Z_FINISH); | |
215 | } while (result == Z_OK); | |
216 | ||
217 | if (result != Z_STREAM_END) { | |
218 | free(buffer); | |
219 | return NULL; | |
220 | } | |
221 | ||
222 | git_deflate_end(&stream); | |
223 | *compressed_size = stream.total_out; | |
224 | ||
225 | return buffer; | |
226 | } | |
227 | ||
228 | static void write_zip_data_desc(unsigned long size, | |
229 | unsigned long compressed_size, | |
230 | unsigned long crc) | |
231 | { | |
232 | if (size >= 0xffffffff || compressed_size >= 0xffffffff) { | |
233 | struct zip64_data_desc trailer; | |
234 | copy_le32(trailer.magic, 0x08074b50); | |
235 | copy_le32(trailer.crc32, crc); | |
236 | copy_le64(trailer.compressed_size, compressed_size); | |
237 | copy_le64(trailer.size, size); | |
238 | write_or_die(1, &trailer, ZIP64_DATA_DESC_SIZE); | |
239 | zip_offset += ZIP64_DATA_DESC_SIZE; | |
240 | } else { | |
241 | struct zip_data_desc trailer; | |
242 | copy_le32(trailer.magic, 0x08074b50); | |
243 | copy_le32(trailer.crc32, crc); | |
244 | copy_le32(trailer.compressed_size, compressed_size); | |
245 | copy_le32(trailer.size, size); | |
246 | write_or_die(1, &trailer, ZIP_DATA_DESC_SIZE); | |
247 | zip_offset += ZIP_DATA_DESC_SIZE; | |
248 | } | |
249 | } | |
250 | ||
251 | static void set_zip_header_data_desc(struct zip_local_header *header, | |
252 | unsigned long size, | |
253 | unsigned long compressed_size, | |
254 | unsigned long crc) | |
255 | { | |
256 | copy_le32(header->crc32, crc); | |
257 | copy_le32(header->compressed_size, compressed_size); | |
258 | copy_le32(header->size, size); | |
259 | } | |
260 | ||
261 | static int has_only_ascii(const char *s) | |
262 | { | |
263 | for (;;) { | |
264 | int c = *s++; | |
265 | if (c == '\0') | |
266 | return 1; | |
267 | if (!isascii(c)) | |
268 | return 0; | |
269 | } | |
270 | } | |
271 | ||
272 | static int entry_is_binary(struct index_state *istate, const char *path, | |
273 | const void *buffer, size_t size) | |
274 | { | |
275 | struct userdiff_driver *driver = userdiff_find_by_path(istate, path); | |
276 | if (!driver) | |
277 | driver = userdiff_find_by_name("default"); | |
278 | if (driver->binary != -1) | |
279 | return driver->binary; | |
280 | return buffer_is_binary(buffer, size); | |
281 | } | |
282 | ||
283 | #define STREAM_BUFFER_SIZE (1024 * 16) | |
284 | ||
285 | static int write_zip_entry(struct archiver_args *args, | |
286 | const struct object_id *oid, | |
287 | const char *path, size_t pathlen, | |
288 | unsigned int mode, | |
289 | void *buffer, unsigned long size) | |
290 | { | |
291 | struct zip_local_header header; | |
292 | uintmax_t offset = zip_offset; | |
293 | struct zip_extra_mtime extra; | |
294 | struct zip64_extra extra64; | |
295 | size_t header_extra_size = ZIP_EXTRA_MTIME_SIZE; | |
296 | int need_zip64_extra = 0; | |
297 | unsigned long attr2; | |
298 | unsigned long compressed_size; | |
299 | unsigned long crc; | |
300 | enum zip_method method; | |
301 | unsigned char *out; | |
302 | void *deflated = NULL; | |
303 | struct git_istream *stream = NULL; | |
304 | unsigned long flags = 0; | |
305 | int is_binary = -1; | |
306 | const char *path_without_prefix = path + args->baselen; | |
307 | unsigned int creator_version = 0; | |
308 | unsigned int version_needed = 10; | |
309 | size_t zip_dir_extra_size = ZIP_EXTRA_MTIME_SIZE; | |
310 | size_t zip64_dir_extra_payload_size = 0; | |
311 | ||
312 | crc = crc32(0, NULL, 0); | |
313 | ||
314 | if (!has_only_ascii(path)) { | |
315 | if (is_utf8(path)) | |
316 | flags |= ZIP_UTF8; | |
317 | else | |
318 | warning(_("path is not valid UTF-8: %s"), path); | |
319 | } | |
320 | ||
321 | if (pathlen > 0xffff) { | |
322 | return error(_("path too long (%d chars, SHA1: %s): %s"), | |
323 | (int)pathlen, oid_to_hex(oid), path); | |
324 | } | |
325 | ||
326 | if (S_ISDIR(mode) || S_ISGITLINK(mode)) { | |
327 | method = ZIP_METHOD_STORE; | |
328 | attr2 = 16; | |
329 | out = NULL; | |
330 | compressed_size = 0; | |
331 | } else if (S_ISREG(mode) || S_ISLNK(mode)) { | |
332 | method = ZIP_METHOD_STORE; | |
333 | attr2 = S_ISLNK(mode) ? ((mode | 0777) << 16) : | |
334 | (mode & 0111) ? ((mode) << 16) : 0; | |
335 | if (S_ISLNK(mode) || (mode & 0111)) | |
336 | creator_version = 0x0317; | |
337 | if (S_ISREG(mode) && args->compression_level != 0 && size > 0) | |
338 | method = ZIP_METHOD_DEFLATE; | |
339 | ||
340 | if (!buffer) { | |
341 | enum object_type type; | |
342 | stream = open_istream(args->repo, oid, &type, &size, | |
343 | NULL); | |
344 | if (!stream) | |
345 | return error(_("cannot stream blob %s"), | |
346 | oid_to_hex(oid)); | |
347 | flags |= ZIP_STREAM; | |
348 | out = NULL; | |
349 | } else { | |
350 | crc = crc32(crc, buffer, size); | |
351 | is_binary = entry_is_binary(args->repo->index, | |
352 | path_without_prefix, | |
353 | buffer, size); | |
354 | out = buffer; | |
355 | } | |
356 | compressed_size = (method == ZIP_METHOD_STORE) ? size : 0; | |
357 | } else { | |
358 | return error(_("unsupported file mode: 0%o (SHA1: %s)"), mode, | |
359 | oid_to_hex(oid)); | |
360 | } | |
361 | ||
362 | if (creator_version > max_creator_version) | |
363 | max_creator_version = creator_version; | |
364 | ||
365 | if (buffer && method == ZIP_METHOD_DEFLATE) { | |
366 | out = deflated = zlib_deflate_raw(buffer, size, | |
367 | args->compression_level, | |
368 | &compressed_size); | |
369 | if (!out || compressed_size >= size) { | |
370 | out = buffer; | |
371 | method = ZIP_METHOD_STORE; | |
372 | compressed_size = size; | |
373 | } | |
374 | } | |
375 | ||
376 | copy_le16(extra.magic, 0x5455); | |
377 | copy_le16(extra.extra_size, ZIP_EXTRA_MTIME_PAYLOAD_SIZE); | |
378 | extra.flags[0] = 1; /* just mtime */ | |
379 | copy_le32(extra.mtime, args->time); | |
380 | ||
381 | if (size > 0xffffffff || compressed_size > 0xffffffff) | |
382 | need_zip64_extra = 1; | |
383 | if (stream && size > 0x7fffffff) | |
384 | need_zip64_extra = 1; | |
385 | ||
386 | if (need_zip64_extra) | |
387 | version_needed = 45; | |
388 | ||
389 | copy_le32(header.magic, 0x04034b50); | |
390 | copy_le16(header.version, version_needed); | |
391 | copy_le16(header.flags, flags); | |
392 | copy_le16(header.compression_method, method); | |
393 | copy_le16(header.mtime, zip_time); | |
394 | copy_le16(header.mdate, zip_date); | |
395 | if (need_zip64_extra) { | |
396 | set_zip_header_data_desc(&header, 0xffffffff, 0xffffffff, crc); | |
397 | header_extra_size += ZIP64_EXTRA_SIZE; | |
398 | } else { | |
399 | set_zip_header_data_desc(&header, size, compressed_size, crc); | |
400 | } | |
401 | copy_le16(header.filename_length, pathlen); | |
402 | copy_le16(header.extra_length, header_extra_size); | |
403 | write_or_die(1, &header, ZIP_LOCAL_HEADER_SIZE); | |
404 | zip_offset += ZIP_LOCAL_HEADER_SIZE; | |
405 | write_or_die(1, path, pathlen); | |
406 | zip_offset += pathlen; | |
407 | write_or_die(1, &extra, ZIP_EXTRA_MTIME_SIZE); | |
408 | zip_offset += ZIP_EXTRA_MTIME_SIZE; | |
409 | if (need_zip64_extra) { | |
410 | copy_le16(extra64.magic, 0x0001); | |
411 | copy_le16(extra64.extra_size, ZIP64_EXTRA_PAYLOAD_SIZE); | |
412 | copy_le64(extra64.size, size); | |
413 | copy_le64(extra64.compressed_size, compressed_size); | |
414 | write_or_die(1, &extra64, ZIP64_EXTRA_SIZE); | |
415 | zip_offset += ZIP64_EXTRA_SIZE; | |
416 | } | |
417 | ||
418 | if (stream && method == ZIP_METHOD_STORE) { | |
419 | unsigned char buf[STREAM_BUFFER_SIZE]; | |
420 | ssize_t readlen; | |
421 | ||
422 | for (;;) { | |
423 | readlen = read_istream(stream, buf, sizeof(buf)); | |
424 | if (readlen <= 0) | |
425 | break; | |
426 | crc = crc32(crc, buf, readlen); | |
427 | if (is_binary == -1) | |
428 | is_binary = entry_is_binary(args->repo->index, | |
429 | 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 == ZIP_METHOD_DEFLATE) { | |
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(args->repo->index, | |
462 | path_without_prefix, | |
463 | buf, readlen); | |
464 | ||
465 | zstream.next_in = buf; | |
466 | zstream.avail_in = readlen; | |
467 | result = git_deflate(&zstream, 0); | |
468 | if (result != Z_OK) | |
469 | die(_("deflate error (%d)"), result); | |
470 | out_len = zstream.next_out - compressed; | |
471 | ||
472 | if (out_len > 0) { | |
473 | write_or_die(1, compressed, out_len); | |
474 | compressed_size += out_len; | |
475 | zstream.next_out = compressed; | |
476 | zstream.avail_out = sizeof(compressed); | |
477 | } | |
478 | ||
479 | } | |
480 | close_istream(stream); | |
481 | if (readlen) | |
482 | return readlen; | |
483 | ||
484 | zstream.next_in = buf; | |
485 | zstream.avail_in = 0; | |
486 | result = git_deflate(&zstream, Z_FINISH); | |
487 | if (result != Z_STREAM_END) | |
488 | die("deflate error (%d)", result); | |
489 | ||
490 | git_deflate_end(&zstream); | |
491 | out_len = zstream.next_out - compressed; | |
492 | write_or_die(1, compressed, out_len); | |
493 | compressed_size += out_len; | |
494 | zip_offset += compressed_size; | |
495 | ||
496 | write_zip_data_desc(size, compressed_size, crc); | |
497 | } else if (compressed_size > 0) { | |
498 | write_or_die(1, out, compressed_size); | |
499 | zip_offset += compressed_size; | |
500 | } | |
501 | ||
502 | free(deflated); | |
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 struct object_id *oid) | |
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, oid ? the_hash_algo->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 (oid) | |
594 | write_or_die(1, oid_to_hex(oid), the_hash_algo->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 tm; | |
601 | ||
602 | if (date_overflows(*timestamp)) | |
603 | die(_("timestamp too large for this system: %"PRItime), | |
604 | *timestamp); | |
605 | time = (time_t)*timestamp; | |
606 | localtime_r(&time, &tm); | |
607 | *timestamp = time; | |
608 | ||
609 | *dos_date = tm.tm_mday + (tm.tm_mon + 1) * 32 + | |
610 | (tm.tm_year + 1900 - 1980) * 512; | |
611 | *dos_time = tm.tm_sec / 2 + tm.tm_min * 32 + tm.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_oid); | |
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 | } |