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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" |
88182bab | 7 | #include "utf8.h" |
4aff646d RS |
8 | #include "userdiff.h" |
9 | #include "xdiff-interface.h" | |
e4fbbfe9 | 10 | |
e4fbbfe9 RS |
11 | static int zip_date; |
12 | static int zip_time; | |
13 | ||
14 | static unsigned char *zip_dir; | |
15 | static unsigned int zip_dir_size; | |
16 | ||
17 | static unsigned int zip_offset; | |
18 | static unsigned int zip_dir_offset; | |
19 | static unsigned int zip_dir_entries; | |
20 | ||
21 | #define ZIP_DIRECTORY_MIN_SIZE (1024 * 1024) | |
88182bab RS |
22 | #define ZIP_STREAM (1 << 3) |
23 | #define ZIP_UTF8 (1 << 11) | |
e4fbbfe9 RS |
24 | |
25 | struct zip_local_header { | |
26 | unsigned char magic[4]; | |
27 | unsigned char version[2]; | |
28 | unsigned char flags[2]; | |
29 | unsigned char compression_method[2]; | |
30 | unsigned char mtime[2]; | |
31 | unsigned char mdate[2]; | |
32 | unsigned char crc32[4]; | |
33 | unsigned char compressed_size[4]; | |
34 | unsigned char size[4]; | |
35 | unsigned char filename_length[2]; | |
36 | unsigned char extra_length[2]; | |
0ea865ce | 37 | unsigned char _end[1]; |
e4fbbfe9 RS |
38 | }; |
39 | ||
2158f883 RS |
40 | struct zip_data_desc { |
41 | unsigned char magic[4]; | |
42 | unsigned char crc32[4]; | |
43 | unsigned char compressed_size[4]; | |
44 | unsigned char size[4]; | |
45 | unsigned char _end[1]; | |
46 | }; | |
47 | ||
e4fbbfe9 RS |
48 | struct zip_dir_header { |
49 | unsigned char magic[4]; | |
50 | unsigned char creator_version[2]; | |
51 | unsigned char version[2]; | |
52 | unsigned char flags[2]; | |
53 | unsigned char compression_method[2]; | |
54 | unsigned char mtime[2]; | |
55 | unsigned char mdate[2]; | |
56 | unsigned char crc32[4]; | |
57 | unsigned char compressed_size[4]; | |
58 | unsigned char size[4]; | |
59 | unsigned char filename_length[2]; | |
60 | unsigned char extra_length[2]; | |
61 | unsigned char comment_length[2]; | |
62 | unsigned char disk[2]; | |
63 | unsigned char attr1[2]; | |
64 | unsigned char attr2[4]; | |
65 | unsigned char offset[4]; | |
0ea865ce | 66 | unsigned char _end[1]; |
e4fbbfe9 RS |
67 | }; |
68 | ||
69 | struct zip_dir_trailer { | |
70 | unsigned char magic[4]; | |
71 | unsigned char disk[2]; | |
72 | unsigned char directory_start_disk[2]; | |
73 | unsigned char entries_on_this_disk[2]; | |
74 | unsigned char entries[2]; | |
75 | unsigned char size[4]; | |
76 | unsigned char offset[4]; | |
77 | unsigned char comment_length[2]; | |
0ea865ce | 78 | unsigned char _end[1]; |
e4fbbfe9 RS |
79 | }; |
80 | ||
227bf598 RS |
81 | struct zip_extra_mtime { |
82 | unsigned char magic[2]; | |
83 | unsigned char extra_size[2]; | |
84 | unsigned char flags[1]; | |
85 | unsigned char mtime[4]; | |
86 | unsigned char _end[1]; | |
87 | }; | |
88 | ||
0ea865ce RS |
89 | /* |
90 | * On ARM, padding is added at the end of the struct, so a simple | |
91 | * sizeof(struct ...) reports two bytes more than the payload size | |
92 | * we're interested in. | |
93 | */ | |
94 | #define ZIP_LOCAL_HEADER_SIZE offsetof(struct zip_local_header, _end) | |
2158f883 | 95 | #define ZIP_DATA_DESC_SIZE offsetof(struct zip_data_desc, _end) |
0ea865ce RS |
96 | #define ZIP_DIR_HEADER_SIZE offsetof(struct zip_dir_header, _end) |
97 | #define ZIP_DIR_TRAILER_SIZE offsetof(struct zip_dir_trailer, _end) | |
227bf598 RS |
98 | #define ZIP_EXTRA_MTIME_SIZE offsetof(struct zip_extra_mtime, _end) |
99 | #define ZIP_EXTRA_MTIME_PAYLOAD_SIZE \ | |
100 | (ZIP_EXTRA_MTIME_SIZE - offsetof(struct zip_extra_mtime, flags)) | |
0ea865ce | 101 | |
e4fbbfe9 RS |
102 | static void copy_le16(unsigned char *dest, unsigned int n) |
103 | { | |
104 | dest[0] = 0xff & n; | |
105 | dest[1] = 0xff & (n >> 010); | |
106 | } | |
107 | ||
108 | static void copy_le32(unsigned char *dest, unsigned int n) | |
109 | { | |
110 | dest[0] = 0xff & n; | |
111 | dest[1] = 0xff & (n >> 010); | |
112 | dest[2] = 0xff & (n >> 020); | |
113 | dest[3] = 0xff & (n >> 030); | |
114 | } | |
115 | ||
c3c2e1a0 RS |
116 | static void *zlib_deflate_raw(void *data, unsigned long size, |
117 | int compression_level, | |
118 | unsigned long *compressed_size) | |
e4fbbfe9 | 119 | { |
ef49a7a0 | 120 | git_zstream stream; |
e4fbbfe9 RS |
121 | unsigned long maxsize; |
122 | void *buffer; | |
123 | int result; | |
124 | ||
c3c2e1a0 | 125 | git_deflate_init_raw(&stream, compression_level); |
225a6f10 | 126 | maxsize = git_deflate_bound(&stream, size); |
e4fbbfe9 RS |
127 | buffer = xmalloc(maxsize); |
128 | ||
129 | stream.next_in = data; | |
130 | stream.avail_in = size; | |
131 | stream.next_out = buffer; | |
132 | stream.avail_out = maxsize; | |
133 | ||
134 | do { | |
55bb5c91 | 135 | result = git_deflate(&stream, Z_FINISH); |
e4fbbfe9 RS |
136 | } while (result == Z_OK); |
137 | ||
138 | if (result != Z_STREAM_END) { | |
139 | free(buffer); | |
140 | return NULL; | |
141 | } | |
142 | ||
55bb5c91 | 143 | git_deflate_end(&stream); |
e4fbbfe9 RS |
144 | *compressed_size = stream.total_out; |
145 | ||
146 | return buffer; | |
147 | } | |
148 | ||
2158f883 RS |
149 | static void write_zip_data_desc(unsigned long size, |
150 | unsigned long compressed_size, | |
151 | unsigned long crc) | |
152 | { | |
153 | struct zip_data_desc trailer; | |
154 | ||
155 | copy_le32(trailer.magic, 0x08074b50); | |
156 | copy_le32(trailer.crc32, crc); | |
157 | copy_le32(trailer.compressed_size, compressed_size); | |
158 | copy_le32(trailer.size, size); | |
159 | write_or_die(1, &trailer, ZIP_DATA_DESC_SIZE); | |
160 | } | |
161 | ||
ebf5374a RS |
162 | static void set_zip_dir_data_desc(struct zip_dir_header *header, |
163 | unsigned long size, | |
164 | unsigned long compressed_size, | |
165 | unsigned long crc) | |
166 | { | |
167 | copy_le32(header->crc32, crc); | |
168 | copy_le32(header->compressed_size, compressed_size); | |
169 | copy_le32(header->size, size); | |
170 | } | |
171 | ||
172 | static void set_zip_header_data_desc(struct zip_local_header *header, | |
173 | unsigned long size, | |
174 | unsigned long compressed_size, | |
175 | unsigned long crc) | |
176 | { | |
177 | copy_le32(header->crc32, crc); | |
178 | copy_le32(header->compressed_size, compressed_size); | |
179 | copy_le32(header->size, size); | |
180 | } | |
181 | ||
88182bab RS |
182 | static int has_only_ascii(const char *s) |
183 | { | |
184 | for (;;) { | |
185 | int c = *s++; | |
186 | if (c == '\0') | |
187 | return 1; | |
188 | if (!isascii(c)) | |
189 | return 0; | |
190 | } | |
191 | } | |
192 | ||
4aff646d RS |
193 | static int entry_is_binary(const char *path, const void *buffer, size_t size) |
194 | { | |
195 | struct userdiff_driver *driver = userdiff_find_by_path(path); | |
196 | if (!driver) | |
197 | driver = userdiff_find_by_name("default"); | |
198 | if (driver->binary != -1) | |
199 | return driver->binary; | |
200 | return buffer_is_binary(buffer, size); | |
201 | } | |
202 | ||
2158f883 RS |
203 | #define STREAM_BUFFER_SIZE (1024 * 16) |
204 | ||
562e25ab | 205 | static int write_zip_entry(struct archiver_args *args, |
9cb513b7 NTND |
206 | const unsigned char *sha1, |
207 | const char *path, size_t pathlen, | |
208 | unsigned int mode) | |
e4fbbfe9 RS |
209 | { |
210 | struct zip_local_header header; | |
211 | struct zip_dir_header dirent; | |
227bf598 | 212 | struct zip_extra_mtime extra; |
bb52d22e | 213 | unsigned long attr2; |
e4fbbfe9 | 214 | unsigned long compressed_size; |
e4fbbfe9 RS |
215 | unsigned long crc; |
216 | unsigned long direntsize; | |
e4fbbfe9 | 217 | int method; |
e4fbbfe9 | 218 | unsigned char *out; |
e4fbbfe9 | 219 | void *deflated = NULL; |
9cb513b7 | 220 | void *buffer; |
2158f883 RS |
221 | struct git_istream *stream = NULL; |
222 | unsigned long flags = 0; | |
9cb513b7 | 223 | unsigned long size; |
4aff646d RS |
224 | int is_binary = -1; |
225 | const char *path_without_prefix = path + args->baselen; | |
e4fbbfe9 | 226 | |
38f4d138 | 227 | crc = crc32(0, NULL, 0); |
e4fbbfe9 | 228 | |
88182bab RS |
229 | if (!has_only_ascii(path)) { |
230 | if (is_utf8(path)) | |
231 | flags |= ZIP_UTF8; | |
232 | else | |
233 | warning("Path is not valid UTF-8: %s", path); | |
234 | } | |
235 | ||
e4fbbfe9 | 236 | if (pathlen > 0xffff) { |
562e25ab RS |
237 | return error("path too long (%d chars, SHA1: %s): %s", |
238 | (int)pathlen, sha1_to_hex(sha1), path); | |
e4fbbfe9 RS |
239 | } |
240 | ||
302b9282 | 241 | if (S_ISDIR(mode) || S_ISGITLINK(mode)) { |
e4fbbfe9 | 242 | method = 0; |
62cdce17 | 243 | attr2 = 16; |
e4fbbfe9 | 244 | out = NULL; |
60df6bd1 | 245 | size = 0; |
e4fbbfe9 | 246 | compressed_size = 0; |
9cb513b7 | 247 | buffer = NULL; |
62cdce17 | 248 | } else if (S_ISREG(mode) || S_ISLNK(mode)) { |
2158f883 | 249 | enum object_type type = sha1_object_info(sha1, &size); |
9cb513b7 | 250 | |
62cdce17 | 251 | method = 0; |
bb52d22e JH |
252 | attr2 = S_ISLNK(mode) ? ((mode | 0777) << 16) : |
253 | (mode & 0111) ? ((mode) << 16) : 0; | |
2158f883 | 254 | if (S_ISREG(mode) && args->compression_level != 0 && size > 0) |
62cdce17 | 255 | method = 8; |
2158f883 RS |
256 | |
257 | if (S_ISREG(mode) && type == OBJ_BLOB && !args->convert && | |
c743c215 | 258 | size > big_file_threshold) { |
2158f883 RS |
259 | stream = open_istream(sha1, &type, &size, NULL); |
260 | if (!stream) | |
261 | return error("cannot stream blob %s", | |
262 | sha1_to_hex(sha1)); | |
263 | flags |= ZIP_STREAM; | |
264 | out = buffer = NULL; | |
265 | } else { | |
266 | buffer = sha1_file_to_archive(args, path, sha1, mode, | |
267 | &type, &size); | |
268 | if (!buffer) | |
269 | return error("cannot read %s", | |
270 | sha1_to_hex(sha1)); | |
271 | crc = crc32(crc, buffer, size); | |
4aff646d RS |
272 | is_binary = entry_is_binary(path_without_prefix, |
273 | buffer, size); | |
2158f883 RS |
274 | out = buffer; |
275 | } | |
d3c1472f | 276 | compressed_size = (method == 0) ? size : 0; |
e4fbbfe9 | 277 | } else { |
562e25ab RS |
278 | return error("unsupported file mode: 0%o (SHA1: %s)", mode, |
279 | sha1_to_hex(sha1)); | |
e4fbbfe9 RS |
280 | } |
281 | ||
2158f883 | 282 | if (buffer && method == 8) { |
c3c2e1a0 RS |
283 | out = deflated = zlib_deflate_raw(buffer, size, |
284 | args->compression_level, | |
285 | &compressed_size); | |
286 | if (!out || compressed_size >= size) { | |
287 | out = buffer; | |
e4fbbfe9 RS |
288 | method = 0; |
289 | compressed_size = size; | |
290 | } | |
291 | } | |
292 | ||
227bf598 RS |
293 | copy_le16(extra.magic, 0x5455); |
294 | copy_le16(extra.extra_size, ZIP_EXTRA_MTIME_PAYLOAD_SIZE); | |
295 | extra.flags[0] = 1; /* just mtime */ | |
296 | copy_le32(extra.mtime, args->time); | |
297 | ||
e4fbbfe9 | 298 | /* make sure we have enough free space in the dictionary */ |
227bf598 | 299 | direntsize = ZIP_DIR_HEADER_SIZE + pathlen + ZIP_EXTRA_MTIME_SIZE; |
e4fbbfe9 RS |
300 | while (zip_dir_size < zip_dir_offset + direntsize) { |
301 | zip_dir_size += ZIP_DIRECTORY_MIN_SIZE; | |
302 | zip_dir = xrealloc(zip_dir, zip_dir_size); | |
303 | } | |
304 | ||
305 | copy_le32(dirent.magic, 0x02014b50); | |
bb52d22e JH |
306 | copy_le16(dirent.creator_version, |
307 | S_ISLNK(mode) || (S_ISREG(mode) && (mode & 0111)) ? 0x0317 : 0); | |
cf72fb07 | 308 | copy_le16(dirent.version, 10); |
2158f883 | 309 | copy_le16(dirent.flags, flags); |
e4fbbfe9 RS |
310 | copy_le16(dirent.compression_method, method); |
311 | copy_le16(dirent.mtime, zip_time); | |
312 | copy_le16(dirent.mdate, zip_date); | |
ebf5374a | 313 | set_zip_dir_data_desc(&dirent, size, compressed_size, crc); |
e4fbbfe9 | 314 | copy_le16(dirent.filename_length, pathlen); |
227bf598 | 315 | copy_le16(dirent.extra_length, ZIP_EXTRA_MTIME_SIZE); |
e4fbbfe9 RS |
316 | copy_le16(dirent.comment_length, 0); |
317 | copy_le16(dirent.disk, 0); | |
62cdce17 | 318 | copy_le32(dirent.attr2, attr2); |
e4fbbfe9 | 319 | copy_le32(dirent.offset, zip_offset); |
e4fbbfe9 RS |
320 | |
321 | copy_le32(header.magic, 0x04034b50); | |
cf72fb07 | 322 | copy_le16(header.version, 10); |
2158f883 | 323 | copy_le16(header.flags, flags); |
e4fbbfe9 RS |
324 | copy_le16(header.compression_method, method); |
325 | copy_le16(header.mtime, zip_time); | |
326 | copy_le16(header.mdate, zip_date); | |
5ea2c847 | 327 | set_zip_header_data_desc(&header, size, compressed_size, crc); |
e4fbbfe9 | 328 | copy_le16(header.filename_length, pathlen); |
227bf598 | 329 | copy_le16(header.extra_length, ZIP_EXTRA_MTIME_SIZE); |
0ea865ce RS |
330 | write_or_die(1, &header, ZIP_LOCAL_HEADER_SIZE); |
331 | zip_offset += ZIP_LOCAL_HEADER_SIZE; | |
e4fbbfe9 RS |
332 | write_or_die(1, path, pathlen); |
333 | zip_offset += pathlen; | |
227bf598 RS |
334 | write_or_die(1, &extra, ZIP_EXTRA_MTIME_SIZE); |
335 | zip_offset += ZIP_EXTRA_MTIME_SIZE; | |
2158f883 RS |
336 | if (stream && method == 0) { |
337 | unsigned char buf[STREAM_BUFFER_SIZE]; | |
338 | ssize_t readlen; | |
339 | ||
340 | for (;;) { | |
341 | readlen = read_istream(stream, buf, sizeof(buf)); | |
342 | if (readlen <= 0) | |
343 | break; | |
344 | crc = crc32(crc, buf, readlen); | |
4aff646d RS |
345 | if (is_binary == -1) |
346 | is_binary = entry_is_binary(path_without_prefix, | |
347 | buf, readlen); | |
2158f883 RS |
348 | write_or_die(1, buf, readlen); |
349 | } | |
350 | close_istream(stream); | |
351 | if (readlen) | |
352 | return readlen; | |
353 | ||
354 | compressed_size = size; | |
355 | zip_offset += compressed_size; | |
356 | ||
357 | write_zip_data_desc(size, compressed_size, crc); | |
358 | zip_offset += ZIP_DATA_DESC_SIZE; | |
359 | ||
c743c215 RS |
360 | set_zip_dir_data_desc(&dirent, size, compressed_size, crc); |
361 | } else if (stream && method == 8) { | |
362 | unsigned char buf[STREAM_BUFFER_SIZE]; | |
363 | ssize_t readlen; | |
364 | git_zstream zstream; | |
365 | int result; | |
366 | size_t out_len; | |
367 | unsigned char compressed[STREAM_BUFFER_SIZE * 2]; | |
368 | ||
c3c2e1a0 | 369 | git_deflate_init_raw(&zstream, args->compression_level); |
c743c215 RS |
370 | |
371 | compressed_size = 0; | |
372 | zstream.next_out = compressed; | |
373 | zstream.avail_out = sizeof(compressed); | |
374 | ||
375 | for (;;) { | |
376 | readlen = read_istream(stream, buf, sizeof(buf)); | |
377 | if (readlen <= 0) | |
378 | break; | |
379 | crc = crc32(crc, buf, readlen); | |
4aff646d RS |
380 | if (is_binary == -1) |
381 | is_binary = entry_is_binary(path_without_prefix, | |
382 | buf, readlen); | |
c743c215 RS |
383 | |
384 | zstream.next_in = buf; | |
385 | zstream.avail_in = readlen; | |
386 | result = git_deflate(&zstream, 0); | |
387 | if (result != Z_OK) | |
388 | die("deflate error (%d)", result); | |
c3c2e1a0 | 389 | out_len = zstream.next_out - compressed; |
c743c215 RS |
390 | |
391 | if (out_len > 0) { | |
c3c2e1a0 | 392 | write_or_die(1, compressed, out_len); |
c743c215 RS |
393 | compressed_size += out_len; |
394 | zstream.next_out = compressed; | |
395 | zstream.avail_out = sizeof(compressed); | |
396 | } | |
397 | ||
398 | } | |
399 | close_istream(stream); | |
400 | if (readlen) | |
401 | return readlen; | |
402 | ||
403 | zstream.next_in = buf; | |
404 | zstream.avail_in = 0; | |
405 | result = git_deflate(&zstream, Z_FINISH); | |
406 | if (result != Z_STREAM_END) | |
407 | die("deflate error (%d)", result); | |
408 | ||
409 | git_deflate_end(&zstream); | |
c3c2e1a0 RS |
410 | out_len = zstream.next_out - compressed; |
411 | write_or_die(1, compressed, out_len); | |
c743c215 RS |
412 | compressed_size += out_len; |
413 | zip_offset += compressed_size; | |
414 | ||
415 | write_zip_data_desc(size, compressed_size, crc); | |
416 | zip_offset += ZIP_DATA_DESC_SIZE; | |
417 | ||
2158f883 RS |
418 | set_zip_dir_data_desc(&dirent, size, compressed_size, crc); |
419 | } else if (compressed_size > 0) { | |
e4fbbfe9 RS |
420 | write_or_die(1, out, compressed_size); |
421 | zip_offset += compressed_size; | |
422 | } | |
423 | ||
e4fbbfe9 | 424 | free(deflated); |
9cb513b7 | 425 | free(buffer); |
e4fbbfe9 | 426 | |
4aff646d RS |
427 | copy_le16(dirent.attr1, !is_binary); |
428 | ||
ebf5374a RS |
429 | memcpy(zip_dir + zip_dir_offset, &dirent, ZIP_DIR_HEADER_SIZE); |
430 | zip_dir_offset += ZIP_DIR_HEADER_SIZE; | |
431 | memcpy(zip_dir + zip_dir_offset, path, pathlen); | |
432 | zip_dir_offset += pathlen; | |
227bf598 RS |
433 | memcpy(zip_dir + zip_dir_offset, &extra, ZIP_EXTRA_MTIME_SIZE); |
434 | zip_dir_offset += ZIP_EXTRA_MTIME_SIZE; | |
ebf5374a RS |
435 | zip_dir_entries++; |
436 | ||
562e25ab | 437 | return 0; |
e4fbbfe9 RS |
438 | } |
439 | ||
440 | static void write_zip_trailer(const unsigned char *sha1) | |
441 | { | |
442 | struct zip_dir_trailer trailer; | |
443 | ||
444 | copy_le32(trailer.magic, 0x06054b50); | |
445 | copy_le16(trailer.disk, 0); | |
446 | copy_le16(trailer.directory_start_disk, 0); | |
447 | copy_le16(trailer.entries_on_this_disk, zip_dir_entries); | |
448 | copy_le16(trailer.entries, zip_dir_entries); | |
449 | copy_le32(trailer.size, zip_dir_offset); | |
450 | copy_le32(trailer.offset, zip_offset); | |
451 | copy_le16(trailer.comment_length, sha1 ? 40 : 0); | |
452 | ||
453 | write_or_die(1, zip_dir, zip_dir_offset); | |
0ea865ce | 454 | write_or_die(1, &trailer, ZIP_DIR_TRAILER_SIZE); |
e4fbbfe9 RS |
455 | if (sha1) |
456 | write_or_die(1, sha1_to_hex(sha1), 40); | |
457 | } | |
458 | ||
459 | static void dos_time(time_t *time, int *dos_date, int *dos_time) | |
460 | { | |
461 | struct tm *t = localtime(time); | |
462 | ||
463 | *dos_date = t->tm_mday + (t->tm_mon + 1) * 32 + | |
464 | (t->tm_year + 1900 - 1980) * 512; | |
465 | *dos_time = t->tm_sec / 2 + t->tm_min * 32 + t->tm_hour * 2048; | |
466 | } | |
467 | ||
4d7c9898 JK |
468 | static int write_zip_archive(const struct archiver *ar, |
469 | struct archiver_args *args) | |
ec06bff5 | 470 | { |
562e25ab RS |
471 | int err; |
472 | ||
ec06bff5 FBH |
473 | dos_time(&args->time, &zip_date, &zip_time); |
474 | ||
475 | zip_dir = xmalloc(ZIP_DIRECTORY_MIN_SIZE); | |
476 | zip_dir_size = ZIP_DIRECTORY_MIN_SIZE; | |
562e25ab RS |
477 | |
478 | err = write_archive_entries(args, write_zip_entry); | |
479 | if (!err) | |
480 | write_zip_trailer(args->commit_sha1); | |
ec06bff5 FBH |
481 | |
482 | free(zip_dir); | |
483 | ||
562e25ab | 484 | return err; |
ec06bff5 | 485 | } |
13e0f88d JK |
486 | |
487 | static struct archiver zip_archiver = { | |
488 | "zip", | |
489 | write_zip_archive, | |
7b97730b | 490 | ARCHIVER_WANT_COMPRESSION_LEVELS|ARCHIVER_REMOTE |
13e0f88d JK |
491 | }; |
492 | ||
493 | void init_zip_archiver(void) | |
494 | { | |
495 | register_archiver(&zip_archiver); | |
496 | } |