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Commit | Line | Data |
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6973dcae JH |
1 | /* |
2 | * Copyright (C) 2005 Junio C Hamano | |
3 | */ | |
4 | #include <sys/types.h> | |
5 | #include <sys/wait.h> | |
6 | #include <signal.h> | |
7 | #include "cache.h" | |
8 | #include "quote.h" | |
9 | #include "diff.h" | |
10 | #include "diffcore.h" | |
051308f6 | 11 | #include "delta.h" |
6973dcae | 12 | #include "xdiff-interface.h" |
7c92fe0e | 13 | #include "color.h" |
6973dcae JH |
14 | |
15 | static int use_size_cache; | |
16 | ||
96f1e58f | 17 | static int diff_detect_rename_default; |
801235c5 | 18 | static int diff_rename_limit_default = -1; |
96f1e58f | 19 | static int diff_use_color_default; |
6973dcae | 20 | |
7c92fe0e | 21 | static char diff_colors[][COLOR_MAXLEN] = { |
f37399e6 | 22 | "\033[m", /* reset */ |
448c3ef1 JH |
23 | "", /* PLAIN (normal) */ |
24 | "\033[1m", /* METAINFO (bold) */ | |
25 | "\033[36m", /* FRAGINFO (cyan) */ | |
26 | "\033[31m", /* OLD (red) */ | |
27 | "\033[32m", /* NEW (green) */ | |
28 | "\033[33m", /* COMMIT (yellow) */ | |
29 | "\033[41m", /* WHITESPACE (red background) */ | |
cd112cef JS |
30 | }; |
31 | ||
801235c5 JH |
32 | static int parse_diff_color_slot(const char *var, int ofs) |
33 | { | |
34 | if (!strcasecmp(var+ofs, "plain")) | |
35 | return DIFF_PLAIN; | |
36 | if (!strcasecmp(var+ofs, "meta")) | |
37 | return DIFF_METAINFO; | |
38 | if (!strcasecmp(var+ofs, "frag")) | |
39 | return DIFF_FRAGINFO; | |
40 | if (!strcasecmp(var+ofs, "old")) | |
41 | return DIFF_FILE_OLD; | |
42 | if (!strcasecmp(var+ofs, "new")) | |
43 | return DIFF_FILE_NEW; | |
ce436973 JK |
44 | if (!strcasecmp(var+ofs, "commit")) |
45 | return DIFF_COMMIT; | |
448c3ef1 JH |
46 | if (!strcasecmp(var+ofs, "whitespace")) |
47 | return DIFF_WHITESPACE; | |
801235c5 JH |
48 | die("bad config variable '%s'", var); |
49 | } | |
50 | ||
83ad63cf JH |
51 | /* |
52 | * These are to give UI layer defaults. | |
53 | * The core-level commands such as git-diff-files should | |
54 | * never be affected by the setting of diff.renames | |
55 | * the user happens to have in the configuration file. | |
56 | */ | |
57 | int git_diff_ui_config(const char *var, const char *value) | |
801235c5 JH |
58 | { |
59 | if (!strcmp(var, "diff.renamelimit")) { | |
60 | diff_rename_limit_default = git_config_int(var, value); | |
61 | return 0; | |
62 | } | |
63 | if (!strcmp(var, "diff.color")) { | |
7c92fe0e | 64 | diff_use_color_default = git_config_colorbool(var, value); |
801235c5 JH |
65 | return 0; |
66 | } | |
b68ea12e EW |
67 | if (!strcmp(var, "diff.renames")) { |
68 | if (!value) | |
69 | diff_detect_rename_default = DIFF_DETECT_RENAME; | |
70 | else if (!strcasecmp(value, "copies") || | |
71 | !strcasecmp(value, "copy")) | |
72 | diff_detect_rename_default = DIFF_DETECT_COPY; | |
73 | else if (git_config_bool(var,value)) | |
74 | diff_detect_rename_default = DIFF_DETECT_RENAME; | |
75 | return 0; | |
76 | } | |
801235c5 JH |
77 | if (!strncmp(var, "diff.color.", 11)) { |
78 | int slot = parse_diff_color_slot(var, 11); | |
7c92fe0e | 79 | color_parse(value, var, diff_colors[slot]); |
801235c5 JH |
80 | return 0; |
81 | } | |
82 | return git_default_config(var, value); | |
83 | } | |
84 | ||
6973dcae JH |
85 | static char *quote_one(const char *str) |
86 | { | |
87 | int needlen; | |
88 | char *xp; | |
89 | ||
90 | if (!str) | |
91 | return NULL; | |
92 | needlen = quote_c_style(str, NULL, NULL, 0); | |
93 | if (!needlen) | |
9befac47 | 94 | return xstrdup(str); |
6973dcae JH |
95 | xp = xmalloc(needlen + 1); |
96 | quote_c_style(str, xp, NULL, 0); | |
97 | return xp; | |
98 | } | |
99 | ||
100 | static char *quote_two(const char *one, const char *two) | |
101 | { | |
102 | int need_one = quote_c_style(one, NULL, NULL, 1); | |
103 | int need_two = quote_c_style(two, NULL, NULL, 1); | |
104 | char *xp; | |
105 | ||
106 | if (need_one + need_two) { | |
107 | if (!need_one) need_one = strlen(one); | |
108 | if (!need_two) need_one = strlen(two); | |
109 | ||
110 | xp = xmalloc(need_one + need_two + 3); | |
111 | xp[0] = '"'; | |
112 | quote_c_style(one, xp + 1, NULL, 1); | |
113 | quote_c_style(two, xp + need_one + 1, NULL, 1); | |
114 | strcpy(xp + need_one + need_two + 1, "\""); | |
115 | return xp; | |
116 | } | |
117 | need_one = strlen(one); | |
118 | need_two = strlen(two); | |
119 | xp = xmalloc(need_one + need_two + 1); | |
120 | strcpy(xp, one); | |
121 | strcpy(xp + need_one, two); | |
122 | return xp; | |
123 | } | |
124 | ||
125 | static const char *external_diff(void) | |
126 | { | |
127 | static const char *external_diff_cmd = NULL; | |
128 | static int done_preparing = 0; | |
129 | ||
130 | if (done_preparing) | |
131 | return external_diff_cmd; | |
132 | external_diff_cmd = getenv("GIT_EXTERNAL_DIFF"); | |
133 | done_preparing = 1; | |
134 | return external_diff_cmd; | |
135 | } | |
136 | ||
137 | #define TEMPFILE_PATH_LEN 50 | |
138 | ||
139 | static struct diff_tempfile { | |
140 | const char *name; /* filename external diff should read from */ | |
141 | char hex[41]; | |
142 | char mode[10]; | |
143 | char tmp_path[TEMPFILE_PATH_LEN]; | |
144 | } diff_temp[2]; | |
145 | ||
146 | static int count_lines(const char *data, int size) | |
147 | { | |
148 | int count, ch, completely_empty = 1, nl_just_seen = 0; | |
149 | count = 0; | |
150 | while (0 < size--) { | |
151 | ch = *data++; | |
152 | if (ch == '\n') { | |
153 | count++; | |
154 | nl_just_seen = 1; | |
155 | completely_empty = 0; | |
156 | } | |
157 | else { | |
158 | nl_just_seen = 0; | |
159 | completely_empty = 0; | |
160 | } | |
161 | } | |
162 | if (completely_empty) | |
163 | return 0; | |
164 | if (!nl_just_seen) | |
165 | count++; /* no trailing newline */ | |
166 | return count; | |
167 | } | |
168 | ||
169 | static void print_line_count(int count) | |
170 | { | |
171 | switch (count) { | |
172 | case 0: | |
173 | printf("0,0"); | |
174 | break; | |
175 | case 1: | |
176 | printf("1"); | |
177 | break; | |
178 | default: | |
179 | printf("1,%d", count); | |
180 | break; | |
181 | } | |
182 | } | |
183 | ||
184 | static void copy_file(int prefix, const char *data, int size) | |
185 | { | |
186 | int ch, nl_just_seen = 1; | |
187 | while (0 < size--) { | |
188 | ch = *data++; | |
189 | if (nl_just_seen) | |
190 | putchar(prefix); | |
191 | putchar(ch); | |
192 | if (ch == '\n') | |
193 | nl_just_seen = 1; | |
194 | else | |
195 | nl_just_seen = 0; | |
196 | } | |
197 | if (!nl_just_seen) | |
198 | printf("\n\\ No newline at end of file\n"); | |
199 | } | |
200 | ||
201 | static void emit_rewrite_diff(const char *name_a, | |
202 | const char *name_b, | |
203 | struct diff_filespec *one, | |
204 | struct diff_filespec *two) | |
205 | { | |
206 | int lc_a, lc_b; | |
207 | diff_populate_filespec(one, 0); | |
208 | diff_populate_filespec(two, 0); | |
209 | lc_a = count_lines(one->data, one->size); | |
210 | lc_b = count_lines(two->data, two->size); | |
bc1a5807 | 211 | printf("--- a/%s\n+++ b/%s\n@@ -", name_a, name_b); |
6973dcae JH |
212 | print_line_count(lc_a); |
213 | printf(" +"); | |
214 | print_line_count(lc_b); | |
215 | printf(" @@\n"); | |
216 | if (lc_a) | |
217 | copy_file('-', one->data, one->size); | |
218 | if (lc_b) | |
219 | copy_file('+', two->data, two->size); | |
220 | } | |
221 | ||
222 | static int fill_mmfile(mmfile_t *mf, struct diff_filespec *one) | |
223 | { | |
224 | if (!DIFF_FILE_VALID(one)) { | |
d2543b8e | 225 | mf->ptr = (char *)""; /* does not matter */ |
6973dcae JH |
226 | mf->size = 0; |
227 | return 0; | |
228 | } | |
229 | else if (diff_populate_filespec(one, 0)) | |
230 | return -1; | |
231 | mf->ptr = one->data; | |
232 | mf->size = one->size; | |
233 | return 0; | |
234 | } | |
235 | ||
f59a59e2 JS |
236 | struct diff_words_buffer { |
237 | mmfile_t text; | |
238 | long alloc; | |
239 | long current; /* output pointer */ | |
240 | int suppressed_newline; | |
241 | }; | |
242 | ||
243 | static void diff_words_append(char *line, unsigned long len, | |
244 | struct diff_words_buffer *buffer) | |
245 | { | |
246 | if (buffer->text.size + len > buffer->alloc) { | |
247 | buffer->alloc = (buffer->text.size + len) * 3 / 2; | |
248 | buffer->text.ptr = xrealloc(buffer->text.ptr, buffer->alloc); | |
249 | } | |
250 | line++; | |
251 | len--; | |
252 | memcpy(buffer->text.ptr + buffer->text.size, line, len); | |
253 | buffer->text.size += len; | |
254 | } | |
255 | ||
256 | struct diff_words_data { | |
257 | struct xdiff_emit_state xm; | |
258 | struct diff_words_buffer minus, plus; | |
259 | }; | |
260 | ||
261 | static void print_word(struct diff_words_buffer *buffer, int len, int color, | |
262 | int suppress_newline) | |
263 | { | |
264 | const char *ptr; | |
265 | int eol = 0; | |
266 | ||
267 | if (len == 0) | |
268 | return; | |
269 | ||
270 | ptr = buffer->text.ptr + buffer->current; | |
271 | buffer->current += len; | |
272 | ||
273 | if (ptr[len - 1] == '\n') { | |
274 | eol = 1; | |
275 | len--; | |
276 | } | |
277 | ||
278 | fputs(diff_get_color(1, color), stdout); | |
279 | fwrite(ptr, len, 1, stdout); | |
280 | fputs(diff_get_color(1, DIFF_RESET), stdout); | |
281 | ||
282 | if (eol) { | |
283 | if (suppress_newline) | |
284 | buffer->suppressed_newline = 1; | |
285 | else | |
286 | putchar('\n'); | |
287 | } | |
288 | } | |
289 | ||
290 | static void fn_out_diff_words_aux(void *priv, char *line, unsigned long len) | |
291 | { | |
292 | struct diff_words_data *diff_words = priv; | |
293 | ||
294 | if (diff_words->minus.suppressed_newline) { | |
295 | if (line[0] != '+') | |
296 | putchar('\n'); | |
297 | diff_words->minus.suppressed_newline = 0; | |
298 | } | |
299 | ||
300 | len--; | |
301 | switch (line[0]) { | |
302 | case '-': | |
303 | print_word(&diff_words->minus, len, DIFF_FILE_OLD, 1); | |
304 | break; | |
305 | case '+': | |
306 | print_word(&diff_words->plus, len, DIFF_FILE_NEW, 0); | |
307 | break; | |
308 | case ' ': | |
309 | print_word(&diff_words->plus, len, DIFF_PLAIN, 0); | |
310 | diff_words->minus.current += len; | |
311 | break; | |
312 | } | |
313 | } | |
314 | ||
315 | /* this executes the word diff on the accumulated buffers */ | |
316 | static void diff_words_show(struct diff_words_data *diff_words) | |
317 | { | |
318 | xpparam_t xpp; | |
319 | xdemitconf_t xecfg; | |
320 | xdemitcb_t ecb; | |
321 | mmfile_t minus, plus; | |
322 | int i; | |
323 | ||
324 | minus.size = diff_words->minus.text.size; | |
325 | minus.ptr = xmalloc(minus.size); | |
326 | memcpy(minus.ptr, diff_words->minus.text.ptr, minus.size); | |
327 | for (i = 0; i < minus.size; i++) | |
328 | if (isspace(minus.ptr[i])) | |
329 | minus.ptr[i] = '\n'; | |
330 | diff_words->minus.current = 0; | |
331 | ||
332 | plus.size = diff_words->plus.text.size; | |
333 | plus.ptr = xmalloc(plus.size); | |
334 | memcpy(plus.ptr, diff_words->plus.text.ptr, plus.size); | |
335 | for (i = 0; i < plus.size; i++) | |
336 | if (isspace(plus.ptr[i])) | |
337 | plus.ptr[i] = '\n'; | |
338 | diff_words->plus.current = 0; | |
339 | ||
340 | xpp.flags = XDF_NEED_MINIMAL; | |
341 | xecfg.ctxlen = diff_words->minus.alloc + diff_words->plus.alloc; | |
342 | xecfg.flags = 0; | |
343 | ecb.outf = xdiff_outf; | |
344 | ecb.priv = diff_words; | |
345 | diff_words->xm.consume = fn_out_diff_words_aux; | |
346 | xdl_diff(&minus, &plus, &xpp, &xecfg, &ecb); | |
347 | ||
348 | free(minus.ptr); | |
349 | free(plus.ptr); | |
350 | diff_words->minus.text.size = diff_words->plus.text.size = 0; | |
351 | ||
352 | if (diff_words->minus.suppressed_newline) { | |
353 | putchar('\n'); | |
354 | diff_words->minus.suppressed_newline = 0; | |
355 | } | |
356 | } | |
357 | ||
6973dcae | 358 | struct emit_callback { |
cd112cef JS |
359 | struct xdiff_emit_state xm; |
360 | int nparents, color_diff; | |
6973dcae | 361 | const char **label_path; |
f59a59e2 | 362 | struct diff_words_data *diff_words; |
6973dcae JH |
363 | }; |
364 | ||
f59a59e2 JS |
365 | static void free_diff_words_data(struct emit_callback *ecbdata) |
366 | { | |
367 | if (ecbdata->diff_words) { | |
368 | /* flush buffers */ | |
369 | if (ecbdata->diff_words->minus.text.size || | |
370 | ecbdata->diff_words->plus.text.size) | |
371 | diff_words_show(ecbdata->diff_words); | |
372 | ||
373 | if (ecbdata->diff_words->minus.text.ptr) | |
374 | free (ecbdata->diff_words->minus.text.ptr); | |
375 | if (ecbdata->diff_words->plus.text.ptr) | |
376 | free (ecbdata->diff_words->plus.text.ptr); | |
377 | free(ecbdata->diff_words); | |
378 | ecbdata->diff_words = NULL; | |
379 | } | |
380 | } | |
381 | ||
ce436973 | 382 | const char *diff_get_color(int diff_use_color, enum color_diff ix) |
cd112cef JS |
383 | { |
384 | if (diff_use_color) | |
50f575fc LT |
385 | return diff_colors[ix]; |
386 | return ""; | |
cd112cef JS |
387 | } |
388 | ||
448c3ef1 JH |
389 | static void emit_line(const char *set, const char *reset, const char *line, int len) |
390 | { | |
391 | if (len > 0 && line[len-1] == '\n') | |
392 | len--; | |
393 | fputs(set, stdout); | |
394 | fwrite(line, len, 1, stdout); | |
395 | puts(reset); | |
396 | } | |
397 | ||
398 | static void emit_add_line(const char *reset, struct emit_callback *ecbdata, const char *line, int len) | |
399 | { | |
400 | int col0 = ecbdata->nparents; | |
401 | int last_tab_in_indent = -1; | |
402 | int last_space_in_indent = -1; | |
403 | int i; | |
404 | int tail = len; | |
405 | int need_highlight_leading_space = 0; | |
406 | const char *ws = diff_get_color(ecbdata->color_diff, DIFF_WHITESPACE); | |
407 | const char *set = diff_get_color(ecbdata->color_diff, DIFF_FILE_NEW); | |
408 | ||
409 | if (!*ws) { | |
410 | emit_line(set, reset, line, len); | |
411 | return; | |
412 | } | |
413 | ||
414 | /* The line is a newly added line. Does it have funny leading | |
415 | * whitespaces? In indent, SP should never precede a TAB. | |
416 | */ | |
417 | for (i = col0; i < len; i++) { | |
418 | if (line[i] == '\t') { | |
419 | last_tab_in_indent = i; | |
420 | if (0 <= last_space_in_indent) | |
421 | need_highlight_leading_space = 1; | |
422 | } | |
423 | else if (line[i] == ' ') | |
424 | last_space_in_indent = i; | |
425 | else | |
426 | break; | |
427 | } | |
428 | fputs(set, stdout); | |
429 | fwrite(line, col0, 1, stdout); | |
430 | fputs(reset, stdout); | |
431 | if (((i == len) || line[i] == '\n') && i != col0) { | |
432 | /* The whole line was indent */ | |
433 | emit_line(ws, reset, line + col0, len - col0); | |
434 | return; | |
435 | } | |
436 | i = col0; | |
437 | if (need_highlight_leading_space) { | |
438 | while (i < last_tab_in_indent) { | |
439 | if (line[i] == ' ') { | |
440 | fputs(ws, stdout); | |
441 | putchar(' '); | |
442 | fputs(reset, stdout); | |
443 | } | |
444 | else | |
445 | putchar(line[i]); | |
446 | i++; | |
447 | } | |
448 | } | |
449 | tail = len - 1; | |
450 | if (line[tail] == '\n' && i < tail) | |
451 | tail--; | |
452 | while (i < tail) { | |
453 | if (!isspace(line[tail])) | |
454 | break; | |
455 | tail--; | |
456 | } | |
457 | if ((i < tail && line[tail + 1] != '\n')) { | |
458 | /* This has whitespace between tail+1..len */ | |
459 | fputs(set, stdout); | |
460 | fwrite(line + i, tail - i + 1, 1, stdout); | |
461 | fputs(reset, stdout); | |
462 | emit_line(ws, reset, line + tail + 1, len - tail - 1); | |
463 | } | |
464 | else | |
465 | emit_line(set, reset, line + i, len - i); | |
466 | } | |
467 | ||
cd112cef | 468 | static void fn_out_consume(void *priv, char *line, unsigned long len) |
6973dcae JH |
469 | { |
470 | int i; | |
448c3ef1 | 471 | int color; |
6973dcae | 472 | struct emit_callback *ecbdata = priv; |
ce436973 JK |
473 | const char *set = diff_get_color(ecbdata->color_diff, DIFF_METAINFO); |
474 | const char *reset = diff_get_color(ecbdata->color_diff, DIFF_RESET); | |
6973dcae JH |
475 | |
476 | if (ecbdata->label_path[0]) { | |
50f575fc LT |
477 | printf("%s--- %s%s\n", set, ecbdata->label_path[0], reset); |
478 | printf("%s+++ %s%s\n", set, ecbdata->label_path[1], reset); | |
6973dcae JH |
479 | ecbdata->label_path[0] = ecbdata->label_path[1] = NULL; |
480 | } | |
cd112cef JS |
481 | |
482 | /* This is not really necessary for now because | |
483 | * this codepath only deals with two-way diffs. | |
484 | */ | |
485 | for (i = 0; i < len && line[i] == '@'; i++) | |
486 | ; | |
487 | if (2 <= i && i < len && line[i] == ' ') { | |
488 | ecbdata->nparents = i - 1; | |
448c3ef1 JH |
489 | emit_line(diff_get_color(ecbdata->color_diff, DIFF_FRAGINFO), |
490 | reset, line, len); | |
491 | return; | |
cd112cef | 492 | } |
448c3ef1 JH |
493 | |
494 | if (len < ecbdata->nparents) { | |
50f575fc | 495 | set = reset; |
448c3ef1 JH |
496 | emit_line(reset, reset, line, len); |
497 | return; | |
cd112cef | 498 | } |
448c3ef1 JH |
499 | |
500 | color = DIFF_PLAIN; | |
501 | if (ecbdata->diff_words && ecbdata->nparents != 1) | |
502 | /* fall back to normal diff */ | |
503 | free_diff_words_data(ecbdata); | |
504 | if (ecbdata->diff_words) { | |
505 | if (line[0] == '-') { | |
506 | diff_words_append(line, len, | |
507 | &ecbdata->diff_words->minus); | |
508 | return; | |
509 | } else if (line[0] == '+') { | |
510 | diff_words_append(line, len, | |
511 | &ecbdata->diff_words->plus); | |
512 | return; | |
513 | } | |
514 | if (ecbdata->diff_words->minus.text.size || | |
515 | ecbdata->diff_words->plus.text.size) | |
516 | diff_words_show(ecbdata->diff_words); | |
517 | line++; | |
50f575fc | 518 | len--; |
448c3ef1 JH |
519 | emit_line(set, reset, line, len); |
520 | return; | |
521 | } | |
522 | for (i = 0; i < ecbdata->nparents && len; i++) { | |
523 | if (line[i] == '-') | |
524 | color = DIFF_FILE_OLD; | |
525 | else if (line[i] == '+') | |
526 | color = DIFF_FILE_NEW; | |
527 | } | |
528 | ||
529 | if (color != DIFF_FILE_NEW) { | |
530 | emit_line(diff_get_color(ecbdata->color_diff, color), | |
531 | reset, line, len); | |
532 | return; | |
533 | } | |
534 | emit_add_line(reset, ecbdata, line, len); | |
6973dcae JH |
535 | } |
536 | ||
537 | static char *pprint_rename(const char *a, const char *b) | |
538 | { | |
539 | const char *old = a; | |
540 | const char *new = b; | |
541 | char *name = NULL; | |
542 | int pfx_length, sfx_length; | |
543 | int len_a = strlen(a); | |
544 | int len_b = strlen(b); | |
545 | ||
546 | /* Find common prefix */ | |
547 | pfx_length = 0; | |
548 | while (*old && *new && *old == *new) { | |
549 | if (*old == '/') | |
550 | pfx_length = old - a + 1; | |
551 | old++; | |
552 | new++; | |
553 | } | |
554 | ||
555 | /* Find common suffix */ | |
556 | old = a + len_a; | |
557 | new = b + len_b; | |
558 | sfx_length = 0; | |
559 | while (a <= old && b <= new && *old == *new) { | |
560 | if (*old == '/') | |
561 | sfx_length = len_a - (old - a); | |
562 | old--; | |
563 | new--; | |
564 | } | |
565 | ||
566 | /* | |
567 | * pfx{mid-a => mid-b}sfx | |
568 | * {pfx-a => pfx-b}sfx | |
569 | * pfx{sfx-a => sfx-b} | |
570 | * name-a => name-b | |
571 | */ | |
572 | if (pfx_length + sfx_length) { | |
cc908b82 JH |
573 | int a_midlen = len_a - pfx_length - sfx_length; |
574 | int b_midlen = len_b - pfx_length - sfx_length; | |
575 | if (a_midlen < 0) a_midlen = 0; | |
576 | if (b_midlen < 0) b_midlen = 0; | |
577 | ||
e3008464 | 578 | name = xmalloc(pfx_length + a_midlen + b_midlen + sfx_length + 7); |
6973dcae JH |
579 | sprintf(name, "%.*s{%.*s => %.*s}%s", |
580 | pfx_length, a, | |
cc908b82 JH |
581 | a_midlen, a + pfx_length, |
582 | b_midlen, b + pfx_length, | |
6973dcae JH |
583 | a + len_a - sfx_length); |
584 | } | |
585 | else { | |
586 | name = xmalloc(len_a + len_b + 5); | |
587 | sprintf(name, "%s => %s", a, b); | |
588 | } | |
589 | return name; | |
590 | } | |
591 | ||
592 | struct diffstat_t { | |
593 | struct xdiff_emit_state xm; | |
594 | ||
595 | int nr; | |
596 | int alloc; | |
597 | struct diffstat_file { | |
598 | char *name; | |
599 | unsigned is_unmerged:1; | |
600 | unsigned is_binary:1; | |
601 | unsigned is_renamed:1; | |
602 | unsigned int added, deleted; | |
603 | } **files; | |
604 | }; | |
605 | ||
606 | static struct diffstat_file *diffstat_add(struct diffstat_t *diffstat, | |
607 | const char *name_a, | |
608 | const char *name_b) | |
609 | { | |
610 | struct diffstat_file *x; | |
611 | x = xcalloc(sizeof (*x), 1); | |
612 | if (diffstat->nr == diffstat->alloc) { | |
613 | diffstat->alloc = alloc_nr(diffstat->alloc); | |
614 | diffstat->files = xrealloc(diffstat->files, | |
615 | diffstat->alloc * sizeof(x)); | |
616 | } | |
617 | diffstat->files[diffstat->nr++] = x; | |
618 | if (name_b) { | |
619 | x->name = pprint_rename(name_a, name_b); | |
620 | x->is_renamed = 1; | |
621 | } | |
622 | else | |
9befac47 | 623 | x->name = xstrdup(name_a); |
6973dcae JH |
624 | return x; |
625 | } | |
626 | ||
627 | static void diffstat_consume(void *priv, char *line, unsigned long len) | |
628 | { | |
629 | struct diffstat_t *diffstat = priv; | |
630 | struct diffstat_file *x = diffstat->files[diffstat->nr - 1]; | |
631 | ||
632 | if (line[0] == '+') | |
633 | x->added++; | |
634 | else if (line[0] == '-') | |
635 | x->deleted++; | |
636 | } | |
637 | ||
698ce6f8 | 638 | const char mime_boundary_leader[] = "------------"; |
6973dcae | 639 | |
a2540023 JH |
640 | static int scale_linear(int it, int width, int max_change) |
641 | { | |
642 | /* | |
3ed74e60 JS |
643 | * make sure that at least one '-' is printed if there were deletions, |
644 | * and likewise for '+'. | |
a2540023 | 645 | */ |
3ed74e60 JS |
646 | if (max_change < 2) |
647 | return it; | |
648 | return ((it - 1) * (width - 1) + max_change - 1) / (max_change - 1); | |
a2540023 JH |
649 | } |
650 | ||
785f7432 JH |
651 | static void show_name(const char *prefix, const char *name, int len, |
652 | const char *reset, const char *set) | |
a2540023 | 653 | { |
785f7432 | 654 | printf(" %s%s%-*s%s |", set, prefix, len, name, reset); |
a2540023 JH |
655 | } |
656 | ||
785f7432 | 657 | static void show_graph(char ch, int cnt, const char *set, const char *reset) |
a2540023 JH |
658 | { |
659 | if (cnt <= 0) | |
660 | return; | |
785f7432 | 661 | printf("%s", set); |
a2540023 JH |
662 | while (cnt--) |
663 | putchar(ch); | |
785f7432 | 664 | printf("%s", reset); |
a2540023 JH |
665 | } |
666 | ||
667 | static void show_stats(struct diffstat_t* data, struct diff_options *options) | |
6973dcae | 668 | { |
6973dcae | 669 | int i, len, add, del, total, adds = 0, dels = 0; |
a2540023 | 670 | int max_change = 0, max_len = 0; |
6973dcae | 671 | int total_files = data->nr; |
a2540023 | 672 | int width, name_width; |
785f7432 | 673 | const char *reset, *set, *add_c, *del_c; |
6973dcae JH |
674 | |
675 | if (data->nr == 0) | |
676 | return; | |
677 | ||
a2540023 JH |
678 | width = options->stat_width ? options->stat_width : 80; |
679 | name_width = options->stat_name_width ? options->stat_name_width : 50; | |
680 | ||
681 | /* Sanity: give at least 5 columns to the graph, | |
682 | * but leave at least 10 columns for the name. | |
683 | */ | |
684 | if (width < name_width + 15) { | |
685 | if (name_width <= 25) | |
686 | width = name_width + 15; | |
687 | else | |
688 | name_width = width - 15; | |
689 | } | |
690 | ||
691 | /* Find the longest filename and max number of changes */ | |
785f7432 JH |
692 | reset = diff_get_color(options->color_diff, DIFF_RESET); |
693 | set = diff_get_color(options->color_diff, DIFF_PLAIN); | |
694 | add_c = diff_get_color(options->color_diff, DIFF_FILE_NEW); | |
695 | del_c = diff_get_color(options->color_diff, DIFF_FILE_OLD); | |
696 | ||
6973dcae JH |
697 | for (i = 0; i < data->nr; i++) { |
698 | struct diffstat_file *file = data->files[i]; | |
a2540023 JH |
699 | int change = file->added + file->deleted; |
700 | ||
701 | len = quote_c_style(file->name, NULL, NULL, 0); | |
702 | if (len) { | |
703 | char *qname = xmalloc(len + 1); | |
704 | quote_c_style(file->name, qname, NULL, 0); | |
705 | free(file->name); | |
706 | file->name = qname; | |
707 | } | |
6973dcae JH |
708 | |
709 | len = strlen(file->name); | |
710 | if (max_len < len) | |
711 | max_len = len; | |
712 | ||
713 | if (file->is_binary || file->is_unmerged) | |
714 | continue; | |
a2540023 JH |
715 | if (max_change < change) |
716 | max_change = change; | |
6973dcae JH |
717 | } |
718 | ||
a2540023 JH |
719 | /* Compute the width of the graph part; |
720 | * 10 is for one blank at the beginning of the line plus | |
721 | * " | count " between the name and the graph. | |
722 | * | |
723 | * From here on, name_width is the width of the name area, | |
724 | * and width is the width of the graph area. | |
725 | */ | |
726 | name_width = (name_width < max_len) ? name_width : max_len; | |
727 | if (width < (name_width + 10) + max_change) | |
728 | width = width - (name_width + 10); | |
729 | else | |
730 | width = max_change; | |
731 | ||
6973dcae | 732 | for (i = 0; i < data->nr; i++) { |
d2543b8e | 733 | const char *prefix = ""; |
6973dcae JH |
734 | char *name = data->files[i]->name; |
735 | int added = data->files[i]->added; | |
736 | int deleted = data->files[i]->deleted; | |
a2540023 | 737 | int name_len; |
6973dcae JH |
738 | |
739 | /* | |
740 | * "scale" the filename | |
741 | */ | |
a2540023 JH |
742 | len = name_width; |
743 | name_len = strlen(name); | |
744 | if (name_width < name_len) { | |
6973dcae JH |
745 | char *slash; |
746 | prefix = "..."; | |
a2540023 JH |
747 | len -= 3; |
748 | name += name_len - len; | |
6973dcae JH |
749 | slash = strchr(name, '/'); |
750 | if (slash) | |
751 | name = slash; | |
752 | } | |
6973dcae JH |
753 | |
754 | if (data->files[i]->is_binary) { | |
785f7432 | 755 | show_name(prefix, name, len, reset, set); |
a2540023 | 756 | printf(" Bin\n"); |
6973dcae JH |
757 | goto free_diffstat_file; |
758 | } | |
759 | else if (data->files[i]->is_unmerged) { | |
785f7432 | 760 | show_name(prefix, name, len, reset, set); |
a2540023 | 761 | printf(" Unmerged\n"); |
6973dcae JH |
762 | goto free_diffstat_file; |
763 | } | |
764 | else if (!data->files[i]->is_renamed && | |
765 | (added + deleted == 0)) { | |
766 | total_files--; | |
767 | goto free_diffstat_file; | |
768 | } | |
769 | ||
a2540023 JH |
770 | /* |
771 | * scale the add/delete | |
772 | */ | |
6973dcae JH |
773 | add = added; |
774 | del = deleted; | |
775 | total = add + del; | |
776 | adds += add; | |
777 | dels += del; | |
778 | ||
a2540023 | 779 | if (width <= max_change) { |
a2540023 | 780 | add = scale_linear(add, width, max_change); |
3ed74e60 JS |
781 | del = scale_linear(del, width, max_change); |
782 | total = add + del; | |
6973dcae | 783 | } |
785f7432 | 784 | show_name(prefix, name, len, reset, set); |
a2540023 | 785 | printf("%5d ", added + deleted); |
785f7432 JH |
786 | show_graph('+', add, add_c, reset); |
787 | show_graph('-', del, del_c, reset); | |
a2540023 | 788 | putchar('\n'); |
6973dcae JH |
789 | free_diffstat_file: |
790 | free(data->files[i]->name); | |
791 | free(data->files[i]); | |
792 | } | |
793 | free(data->files); | |
785f7432 JH |
794 | printf("%s %d files changed, %d insertions(+), %d deletions(-)%s\n", |
795 | set, total_files, adds, dels, reset); | |
6973dcae JH |
796 | } |
797 | ||
88246898 JS |
798 | struct checkdiff_t { |
799 | struct xdiff_emit_state xm; | |
800 | const char *filename; | |
801 | int lineno; | |
802 | }; | |
803 | ||
804 | static void checkdiff_consume(void *priv, char *line, unsigned long len) | |
805 | { | |
806 | struct checkdiff_t *data = priv; | |
807 | ||
808 | if (line[0] == '+') { | |
809 | int i, spaces = 0; | |
810 | ||
811 | data->lineno++; | |
812 | ||
813 | /* check space before tab */ | |
814 | for (i = 1; i < len && (line[i] == ' ' || line[i] == '\t'); i++) | |
815 | if (line[i] == ' ') | |
816 | spaces++; | |
817 | if (line[i - 1] == '\t' && spaces) | |
818 | printf("%s:%d: space before tab:%.*s\n", | |
819 | data->filename, data->lineno, (int)len, line); | |
820 | ||
821 | /* check white space at line end */ | |
822 | if (line[len - 1] == '\n') | |
823 | len--; | |
824 | if (isspace(line[len - 1])) | |
825 | printf("%s:%d: white space at end: %.*s\n", | |
826 | data->filename, data->lineno, (int)len, line); | |
827 | } else if (line[0] == ' ') | |
828 | data->lineno++; | |
829 | else if (line[0] == '@') { | |
830 | char *plus = strchr(line, '+'); | |
831 | if (plus) | |
9e848163 | 832 | data->lineno = strtol(plus, NULL, 10); |
88246898 JS |
833 | else |
834 | die("invalid diff"); | |
835 | } | |
836 | } | |
837 | ||
0660626c JH |
838 | static unsigned char *deflate_it(char *data, |
839 | unsigned long size, | |
840 | unsigned long *result_size) | |
051308f6 | 841 | { |
0660626c JH |
842 | int bound; |
843 | unsigned char *deflated; | |
844 | z_stream stream; | |
845 | ||
846 | memset(&stream, 0, sizeof(stream)); | |
12f6c308 | 847 | deflateInit(&stream, zlib_compression_level); |
0660626c JH |
848 | bound = deflateBound(&stream, size); |
849 | deflated = xmalloc(bound); | |
850 | stream.next_out = deflated; | |
851 | stream.avail_out = bound; | |
852 | ||
853 | stream.next_in = (unsigned char *)data; | |
854 | stream.avail_in = size; | |
855 | while (deflate(&stream, Z_FINISH) == Z_OK) | |
856 | ; /* nothing */ | |
857 | deflateEnd(&stream); | |
858 | *result_size = stream.total_out; | |
859 | return deflated; | |
051308f6 JH |
860 | } |
861 | ||
d4c452f0 | 862 | static void emit_binary_diff_body(mmfile_t *one, mmfile_t *two) |
051308f6 | 863 | { |
0660626c JH |
864 | void *cp; |
865 | void *delta; | |
866 | void *deflated; | |
867 | void *data; | |
868 | unsigned long orig_size; | |
869 | unsigned long delta_size; | |
870 | unsigned long deflate_size; | |
871 | unsigned long data_size; | |
051308f6 | 872 | |
0660626c JH |
873 | /* We could do deflated delta, or we could do just deflated two, |
874 | * whichever is smaller. | |
051308f6 | 875 | */ |
0660626c JH |
876 | delta = NULL; |
877 | deflated = deflate_it(two->ptr, two->size, &deflate_size); | |
878 | if (one->size && two->size) { | |
879 | delta = diff_delta(one->ptr, one->size, | |
880 | two->ptr, two->size, | |
881 | &delta_size, deflate_size); | |
882 | if (delta) { | |
883 | void *to_free = delta; | |
884 | orig_size = delta_size; | |
885 | delta = deflate_it(delta, delta_size, &delta_size); | |
886 | free(to_free); | |
051308f6 JH |
887 | } |
888 | } | |
051308f6 | 889 | |
0660626c JH |
890 | if (delta && delta_size < deflate_size) { |
891 | printf("delta %lu\n", orig_size); | |
892 | free(deflated); | |
893 | data = delta; | |
894 | data_size = delta_size; | |
895 | } | |
896 | else { | |
897 | printf("literal %lu\n", two->size); | |
898 | free(delta); | |
899 | data = deflated; | |
900 | data_size = deflate_size; | |
901 | } | |
051308f6 | 902 | |
0660626c JH |
903 | /* emit data encoded in base85 */ |
904 | cp = data; | |
905 | while (data_size) { | |
906 | int bytes = (52 < data_size) ? 52 : data_size; | |
051308f6 | 907 | char line[70]; |
0660626c | 908 | data_size -= bytes; |
051308f6 JH |
909 | if (bytes <= 26) |
910 | line[0] = bytes + 'A' - 1; | |
911 | else | |
912 | line[0] = bytes - 26 + 'a' - 1; | |
913 | encode_85(line + 1, cp, bytes); | |
1d7f171c | 914 | cp = (char *) cp + bytes; |
051308f6 JH |
915 | puts(line); |
916 | } | |
917 | printf("\n"); | |
0660626c | 918 | free(data); |
051308f6 JH |
919 | } |
920 | ||
d4c452f0 JH |
921 | static void emit_binary_diff(mmfile_t *one, mmfile_t *two) |
922 | { | |
923 | printf("GIT binary patch\n"); | |
924 | emit_binary_diff_body(one, two); | |
925 | emit_binary_diff_body(two, one); | |
926 | } | |
927 | ||
6973dcae JH |
928 | #define FIRST_FEW_BYTES 8000 |
929 | static int mmfile_is_binary(mmfile_t *mf) | |
930 | { | |
931 | long sz = mf->size; | |
932 | if (FIRST_FEW_BYTES < sz) | |
933 | sz = FIRST_FEW_BYTES; | |
8c0b2bb6 | 934 | return !!memchr(mf->ptr, 0, sz); |
6973dcae JH |
935 | } |
936 | ||
937 | static void builtin_diff(const char *name_a, | |
938 | const char *name_b, | |
939 | struct diff_filespec *one, | |
940 | struct diff_filespec *two, | |
941 | const char *xfrm_msg, | |
051308f6 | 942 | struct diff_options *o, |
6973dcae JH |
943 | int complete_rewrite) |
944 | { | |
945 | mmfile_t mf1, mf2; | |
946 | const char *lbl[2]; | |
947 | char *a_one, *b_two; | |
ce436973 JK |
948 | const char *set = diff_get_color(o->color_diff, DIFF_METAINFO); |
949 | const char *reset = diff_get_color(o->color_diff, DIFF_RESET); | |
6973dcae JH |
950 | |
951 | a_one = quote_two("a/", name_a); | |
952 | b_two = quote_two("b/", name_b); | |
953 | lbl[0] = DIFF_FILE_VALID(one) ? a_one : "/dev/null"; | |
954 | lbl[1] = DIFF_FILE_VALID(two) ? b_two : "/dev/null"; | |
50f575fc | 955 | printf("%sdiff --git %s %s%s\n", set, a_one, b_two, reset); |
6973dcae JH |
956 | if (lbl[0][0] == '/') { |
957 | /* /dev/null */ | |
50f575fc LT |
958 | printf("%snew file mode %06o%s\n", set, two->mode, reset); |
959 | if (xfrm_msg && xfrm_msg[0]) | |
960 | printf("%s%s%s\n", set, xfrm_msg, reset); | |
6973dcae JH |
961 | } |
962 | else if (lbl[1][0] == '/') { | |
50f575fc LT |
963 | printf("%sdeleted file mode %06o%s\n", set, one->mode, reset); |
964 | if (xfrm_msg && xfrm_msg[0]) | |
965 | printf("%s%s%s\n", set, xfrm_msg, reset); | |
6973dcae JH |
966 | } |
967 | else { | |
968 | if (one->mode != two->mode) { | |
50f575fc LT |
969 | printf("%sold mode %06o%s\n", set, one->mode, reset); |
970 | printf("%snew mode %06o%s\n", set, two->mode, reset); | |
cd112cef | 971 | } |
50f575fc LT |
972 | if (xfrm_msg && xfrm_msg[0]) |
973 | printf("%s%s%s\n", set, xfrm_msg, reset); | |
6973dcae JH |
974 | /* |
975 | * we do not run diff between different kind | |
976 | * of objects. | |
977 | */ | |
978 | if ((one->mode ^ two->mode) & S_IFMT) | |
979 | goto free_ab_and_return; | |
980 | if (complete_rewrite) { | |
981 | emit_rewrite_diff(name_a, name_b, one, two); | |
982 | goto free_ab_and_return; | |
983 | } | |
984 | } | |
985 | ||
986 | if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0) | |
987 | die("unable to read files to diff"); | |
988 | ||
6d64ea96 | 989 | if (!o->text && (mmfile_is_binary(&mf1) || mmfile_is_binary(&mf2))) { |
0660626c JH |
990 | /* Quite common confusing case */ |
991 | if (mf1.size == mf2.size && | |
992 | !memcmp(mf1.ptr, mf2.ptr, mf1.size)) | |
993 | goto free_ab_and_return; | |
994 | if (o->binary) | |
051308f6 JH |
995 | emit_binary_diff(&mf1, &mf2); |
996 | else | |
997 | printf("Binary files %s and %s differ\n", | |
998 | lbl[0], lbl[1]); | |
999 | } | |
6973dcae JH |
1000 | else { |
1001 | /* Crazy xdl interfaces.. */ | |
1002 | const char *diffopts = getenv("GIT_DIFF_OPTS"); | |
1003 | xpparam_t xpp; | |
1004 | xdemitconf_t xecfg; | |
1005 | xdemitcb_t ecb; | |
1006 | struct emit_callback ecbdata; | |
1007 | ||
cd112cef | 1008 | memset(&ecbdata, 0, sizeof(ecbdata)); |
6973dcae | 1009 | ecbdata.label_path = lbl; |
cd112cef | 1010 | ecbdata.color_diff = o->color_diff; |
0d21efa5 | 1011 | xpp.flags = XDF_NEED_MINIMAL | o->xdl_opts; |
ee1e5412 | 1012 | xecfg.ctxlen = o->context; |
6973dcae JH |
1013 | xecfg.flags = XDL_EMIT_FUNCNAMES; |
1014 | if (!diffopts) | |
1015 | ; | |
1016 | else if (!strncmp(diffopts, "--unified=", 10)) | |
1017 | xecfg.ctxlen = strtoul(diffopts + 10, NULL, 10); | |
1018 | else if (!strncmp(diffopts, "-u", 2)) | |
1019 | xecfg.ctxlen = strtoul(diffopts + 2, NULL, 10); | |
cd112cef | 1020 | ecb.outf = xdiff_outf; |
6973dcae | 1021 | ecb.priv = &ecbdata; |
cd112cef | 1022 | ecbdata.xm.consume = fn_out_consume; |
f59a59e2 JS |
1023 | if (o->color_diff_words) |
1024 | ecbdata.diff_words = | |
1025 | xcalloc(1, sizeof(struct diff_words_data)); | |
6973dcae | 1026 | xdl_diff(&mf1, &mf2, &xpp, &xecfg, &ecb); |
f59a59e2 JS |
1027 | if (o->color_diff_words) |
1028 | free_diff_words_data(&ecbdata); | |
6973dcae JH |
1029 | } |
1030 | ||
1031 | free_ab_and_return: | |
1032 | free(a_one); | |
1033 | free(b_two); | |
1034 | return; | |
1035 | } | |
1036 | ||
1037 | static void builtin_diffstat(const char *name_a, const char *name_b, | |
1038 | struct diff_filespec *one, | |
1039 | struct diff_filespec *two, | |
710158e3 | 1040 | struct diffstat_t *diffstat, |
0d21efa5 | 1041 | struct diff_options *o, |
710158e3 | 1042 | int complete_rewrite) |
6973dcae JH |
1043 | { |
1044 | mmfile_t mf1, mf2; | |
1045 | struct diffstat_file *data; | |
1046 | ||
1047 | data = diffstat_add(diffstat, name_a, name_b); | |
1048 | ||
1049 | if (!one || !two) { | |
1050 | data->is_unmerged = 1; | |
1051 | return; | |
1052 | } | |
710158e3 JH |
1053 | if (complete_rewrite) { |
1054 | diff_populate_filespec(one, 0); | |
1055 | diff_populate_filespec(two, 0); | |
1056 | data->deleted = count_lines(one->data, one->size); | |
1057 | data->added = count_lines(two->data, two->size); | |
1058 | return; | |
1059 | } | |
6973dcae JH |
1060 | if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0) |
1061 | die("unable to read files to diff"); | |
1062 | ||
1063 | if (mmfile_is_binary(&mf1) || mmfile_is_binary(&mf2)) | |
1064 | data->is_binary = 1; | |
1065 | else { | |
1066 | /* Crazy xdl interfaces.. */ | |
1067 | xpparam_t xpp; | |
1068 | xdemitconf_t xecfg; | |
1069 | xdemitcb_t ecb; | |
1070 | ||
0d21efa5 | 1071 | xpp.flags = XDF_NEED_MINIMAL | o->xdl_opts; |
6973dcae JH |
1072 | xecfg.ctxlen = 0; |
1073 | xecfg.flags = 0; | |
1074 | ecb.outf = xdiff_outf; | |
1075 | ecb.priv = diffstat; | |
1076 | xdl_diff(&mf1, &mf2, &xpp, &xecfg, &ecb); | |
1077 | } | |
1078 | } | |
1079 | ||
88246898 JS |
1080 | static void builtin_checkdiff(const char *name_a, const char *name_b, |
1081 | struct diff_filespec *one, | |
1082 | struct diff_filespec *two) | |
1083 | { | |
1084 | mmfile_t mf1, mf2; | |
1085 | struct checkdiff_t data; | |
1086 | ||
1087 | if (!two) | |
1088 | return; | |
1089 | ||
1090 | memset(&data, 0, sizeof(data)); | |
1091 | data.xm.consume = checkdiff_consume; | |
1092 | data.filename = name_b ? name_b : name_a; | |
1093 | data.lineno = 0; | |
1094 | ||
1095 | if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0) | |
1096 | die("unable to read files to diff"); | |
1097 | ||
1098 | if (mmfile_is_binary(&mf2)) | |
1099 | return; | |
1100 | else { | |
1101 | /* Crazy xdl interfaces.. */ | |
1102 | xpparam_t xpp; | |
1103 | xdemitconf_t xecfg; | |
1104 | xdemitcb_t ecb; | |
1105 | ||
1106 | xpp.flags = XDF_NEED_MINIMAL; | |
1107 | xecfg.ctxlen = 0; | |
1108 | xecfg.flags = 0; | |
1109 | ecb.outf = xdiff_outf; | |
1110 | ecb.priv = &data; | |
1111 | xdl_diff(&mf1, &mf2, &xpp, &xecfg, &ecb); | |
1112 | } | |
1113 | } | |
1114 | ||
6973dcae JH |
1115 | struct diff_filespec *alloc_filespec(const char *path) |
1116 | { | |
1117 | int namelen = strlen(path); | |
1118 | struct diff_filespec *spec = xmalloc(sizeof(*spec) + namelen + 1); | |
1119 | ||
1120 | memset(spec, 0, sizeof(*spec)); | |
1121 | spec->path = (char *)(spec + 1); | |
1122 | memcpy(spec->path, path, namelen+1); | |
1123 | return spec; | |
1124 | } | |
1125 | ||
1126 | void fill_filespec(struct diff_filespec *spec, const unsigned char *sha1, | |
1127 | unsigned short mode) | |
1128 | { | |
1129 | if (mode) { | |
1130 | spec->mode = canon_mode(mode); | |
e702496e | 1131 | hashcpy(spec->sha1, sha1); |
0bef57ee | 1132 | spec->sha1_valid = !is_null_sha1(sha1); |
6973dcae JH |
1133 | } |
1134 | } | |
1135 | ||
1136 | /* | |
1137 | * Given a name and sha1 pair, if the dircache tells us the file in | |
1138 | * the work tree has that object contents, return true, so that | |
1139 | * prepare_temp_file() does not have to inflate and extract. | |
1140 | */ | |
1141 | static int work_tree_matches(const char *name, const unsigned char *sha1) | |
1142 | { | |
1143 | struct cache_entry *ce; | |
1144 | struct stat st; | |
1145 | int pos, len; | |
1146 | ||
1147 | /* We do not read the cache ourselves here, because the | |
1148 | * benchmark with my previous version that always reads cache | |
1149 | * shows that it makes things worse for diff-tree comparing | |
1150 | * two linux-2.6 kernel trees in an already checked out work | |
1151 | * tree. This is because most diff-tree comparisons deal with | |
1152 | * only a small number of files, while reading the cache is | |
1153 | * expensive for a large project, and its cost outweighs the | |
1154 | * savings we get by not inflating the object to a temporary | |
1155 | * file. Practically, this code only helps when we are used | |
1156 | * by diff-cache --cached, which does read the cache before | |
1157 | * calling us. | |
1158 | */ | |
1159 | if (!active_cache) | |
1160 | return 0; | |
1161 | ||
1162 | len = strlen(name); | |
1163 | pos = cache_name_pos(name, len); | |
1164 | if (pos < 0) | |
1165 | return 0; | |
1166 | ce = active_cache[pos]; | |
1167 | if ((lstat(name, &st) < 0) || | |
1168 | !S_ISREG(st.st_mode) || /* careful! */ | |
1169 | ce_match_stat(ce, &st, 0) || | |
a89fccd2 | 1170 | hashcmp(sha1, ce->sha1)) |
6973dcae JH |
1171 | return 0; |
1172 | /* we return 1 only when we can stat, it is a regular file, | |
1173 | * stat information matches, and sha1 recorded in the cache | |
1174 | * matches. I.e. we know the file in the work tree really is | |
1175 | * the same as the <name, sha1> pair. | |
1176 | */ | |
1177 | return 1; | |
1178 | } | |
1179 | ||
1180 | static struct sha1_size_cache { | |
1181 | unsigned char sha1[20]; | |
1182 | unsigned long size; | |
1183 | } **sha1_size_cache; | |
1184 | static int sha1_size_cache_nr, sha1_size_cache_alloc; | |
1185 | ||
1186 | static struct sha1_size_cache *locate_size_cache(unsigned char *sha1, | |
1187 | int find_only, | |
1188 | unsigned long size) | |
1189 | { | |
1190 | int first, last; | |
1191 | struct sha1_size_cache *e; | |
1192 | ||
1193 | first = 0; | |
1194 | last = sha1_size_cache_nr; | |
1195 | while (last > first) { | |
1196 | int cmp, next = (last + first) >> 1; | |
1197 | e = sha1_size_cache[next]; | |
a89fccd2 | 1198 | cmp = hashcmp(e->sha1, sha1); |
6973dcae JH |
1199 | if (!cmp) |
1200 | return e; | |
1201 | if (cmp < 0) { | |
1202 | last = next; | |
1203 | continue; | |
1204 | } | |
1205 | first = next+1; | |
1206 | } | |
1207 | /* not found */ | |
1208 | if (find_only) | |
1209 | return NULL; | |
1210 | /* insert to make it at "first" */ | |
1211 | if (sha1_size_cache_alloc <= sha1_size_cache_nr) { | |
1212 | sha1_size_cache_alloc = alloc_nr(sha1_size_cache_alloc); | |
1213 | sha1_size_cache = xrealloc(sha1_size_cache, | |
1214 | sha1_size_cache_alloc * | |
1215 | sizeof(*sha1_size_cache)); | |
1216 | } | |
1217 | sha1_size_cache_nr++; | |
1218 | if (first < sha1_size_cache_nr) | |
1219 | memmove(sha1_size_cache + first + 1, sha1_size_cache + first, | |
1220 | (sha1_size_cache_nr - first - 1) * | |
1221 | sizeof(*sha1_size_cache)); | |
1222 | e = xmalloc(sizeof(struct sha1_size_cache)); | |
1223 | sha1_size_cache[first] = e; | |
e702496e | 1224 | hashcpy(e->sha1, sha1); |
6973dcae JH |
1225 | e->size = size; |
1226 | return e; | |
1227 | } | |
1228 | ||
1229 | /* | |
1230 | * While doing rename detection and pickaxe operation, we may need to | |
1231 | * grab the data for the blob (or file) for our own in-core comparison. | |
1232 | * diff_filespec has data and size fields for this purpose. | |
1233 | */ | |
1234 | int diff_populate_filespec(struct diff_filespec *s, int size_only) | |
1235 | { | |
1236 | int err = 0; | |
1237 | if (!DIFF_FILE_VALID(s)) | |
1238 | die("internal error: asking to populate invalid file."); | |
1239 | if (S_ISDIR(s->mode)) | |
1240 | return -1; | |
1241 | ||
1242 | if (!use_size_cache) | |
1243 | size_only = 0; | |
1244 | ||
1245 | if (s->data) | |
1246 | return err; | |
1247 | if (!s->sha1_valid || | |
1248 | work_tree_matches(s->path, s->sha1)) { | |
1249 | struct stat st; | |
1250 | int fd; | |
1251 | if (lstat(s->path, &st) < 0) { | |
1252 | if (errno == ENOENT) { | |
1253 | err_empty: | |
1254 | err = -1; | |
1255 | empty: | |
d2543b8e | 1256 | s->data = (char *)""; |
6973dcae JH |
1257 | s->size = 0; |
1258 | return err; | |
1259 | } | |
1260 | } | |
1261 | s->size = st.st_size; | |
1262 | if (!s->size) | |
1263 | goto empty; | |
1264 | if (size_only) | |
1265 | return 0; | |
1266 | if (S_ISLNK(st.st_mode)) { | |
1267 | int ret; | |
1268 | s->data = xmalloc(s->size); | |
1269 | s->should_free = 1; | |
1270 | ret = readlink(s->path, s->data, s->size); | |
1271 | if (ret < 0) { | |
1272 | free(s->data); | |
1273 | goto err_empty; | |
1274 | } | |
1275 | return 0; | |
1276 | } | |
1277 | fd = open(s->path, O_RDONLY); | |
1278 | if (fd < 0) | |
1279 | goto err_empty; | |
1280 | s->data = mmap(NULL, s->size, PROT_READ, MAP_PRIVATE, fd, 0); | |
1281 | close(fd); | |
1282 | if (s->data == MAP_FAILED) | |
1283 | goto err_empty; | |
1284 | s->should_munmap = 1; | |
1285 | } | |
1286 | else { | |
1287 | char type[20]; | |
1288 | struct sha1_size_cache *e; | |
1289 | ||
1290 | if (size_only) { | |
1291 | e = locate_size_cache(s->sha1, 1, 0); | |
1292 | if (e) { | |
1293 | s->size = e->size; | |
1294 | return 0; | |
1295 | } | |
1296 | if (!sha1_object_info(s->sha1, type, &s->size)) | |
1297 | locate_size_cache(s->sha1, 0, s->size); | |
1298 | } | |
1299 | else { | |
1300 | s->data = read_sha1_file(s->sha1, type, &s->size); | |
1301 | s->should_free = 1; | |
1302 | } | |
1303 | } | |
1304 | return 0; | |
1305 | } | |
1306 | ||
1307 | void diff_free_filespec_data(struct diff_filespec *s) | |
1308 | { | |
1309 | if (s->should_free) | |
1310 | free(s->data); | |
1311 | else if (s->should_munmap) | |
1312 | munmap(s->data, s->size); | |
1313 | s->should_free = s->should_munmap = 0; | |
1314 | s->data = NULL; | |
1315 | free(s->cnt_data); | |
1316 | s->cnt_data = NULL; | |
1317 | } | |
1318 | ||
1319 | static void prep_temp_blob(struct diff_tempfile *temp, | |
1320 | void *blob, | |
1321 | unsigned long size, | |
1322 | const unsigned char *sha1, | |
1323 | int mode) | |
1324 | { | |
1325 | int fd; | |
1326 | ||
1327 | fd = git_mkstemp(temp->tmp_path, TEMPFILE_PATH_LEN, ".diff_XXXXXX"); | |
1328 | if (fd < 0) | |
1329 | die("unable to create temp-file"); | |
1330 | if (write(fd, blob, size) != size) | |
1331 | die("unable to write temp-file"); | |
1332 | close(fd); | |
1333 | temp->name = temp->tmp_path; | |
1334 | strcpy(temp->hex, sha1_to_hex(sha1)); | |
1335 | temp->hex[40] = 0; | |
1336 | sprintf(temp->mode, "%06o", mode); | |
1337 | } | |
1338 | ||
1339 | static void prepare_temp_file(const char *name, | |
1340 | struct diff_tempfile *temp, | |
1341 | struct diff_filespec *one) | |
1342 | { | |
1343 | if (!DIFF_FILE_VALID(one)) { | |
1344 | not_a_valid_file: | |
1345 | /* A '-' entry produces this for file-2, and | |
1346 | * a '+' entry produces this for file-1. | |
1347 | */ | |
1348 | temp->name = "/dev/null"; | |
1349 | strcpy(temp->hex, "."); | |
1350 | strcpy(temp->mode, "."); | |
1351 | return; | |
1352 | } | |
1353 | ||
1354 | if (!one->sha1_valid || | |
1355 | work_tree_matches(name, one->sha1)) { | |
1356 | struct stat st; | |
1357 | if (lstat(name, &st) < 0) { | |
1358 | if (errno == ENOENT) | |
1359 | goto not_a_valid_file; | |
1360 | die("stat(%s): %s", name, strerror(errno)); | |
1361 | } | |
1362 | if (S_ISLNK(st.st_mode)) { | |
1363 | int ret; | |
1364 | char buf[PATH_MAX + 1]; /* ought to be SYMLINK_MAX */ | |
1365 | if (sizeof(buf) <= st.st_size) | |
1366 | die("symlink too long: %s", name); | |
1367 | ret = readlink(name, buf, st.st_size); | |
1368 | if (ret < 0) | |
1369 | die("readlink(%s)", name); | |
1370 | prep_temp_blob(temp, buf, st.st_size, | |
1371 | (one->sha1_valid ? | |
1372 | one->sha1 : null_sha1), | |
1373 | (one->sha1_valid ? | |
1374 | one->mode : S_IFLNK)); | |
1375 | } | |
1376 | else { | |
1377 | /* we can borrow from the file in the work tree */ | |
1378 | temp->name = name; | |
1379 | if (!one->sha1_valid) | |
1380 | strcpy(temp->hex, sha1_to_hex(null_sha1)); | |
1381 | else | |
1382 | strcpy(temp->hex, sha1_to_hex(one->sha1)); | |
1383 | /* Even though we may sometimes borrow the | |
1384 | * contents from the work tree, we always want | |
1385 | * one->mode. mode is trustworthy even when | |
1386 | * !(one->sha1_valid), as long as | |
1387 | * DIFF_FILE_VALID(one). | |
1388 | */ | |
1389 | sprintf(temp->mode, "%06o", one->mode); | |
1390 | } | |
1391 | return; | |
1392 | } | |
1393 | else { | |
1394 | if (diff_populate_filespec(one, 0)) | |
1395 | die("cannot read data blob for %s", one->path); | |
1396 | prep_temp_blob(temp, one->data, one->size, | |
1397 | one->sha1, one->mode); | |
1398 | } | |
1399 | } | |
1400 | ||
1401 | static void remove_tempfile(void) | |
1402 | { | |
1403 | int i; | |
1404 | ||
1405 | for (i = 0; i < 2; i++) | |
1406 | if (diff_temp[i].name == diff_temp[i].tmp_path) { | |
1407 | unlink(diff_temp[i].name); | |
1408 | diff_temp[i].name = NULL; | |
1409 | } | |
1410 | } | |
1411 | ||
1412 | static void remove_tempfile_on_signal(int signo) | |
1413 | { | |
1414 | remove_tempfile(); | |
1415 | signal(SIGINT, SIG_DFL); | |
1416 | raise(signo); | |
1417 | } | |
1418 | ||
1419 | static int spawn_prog(const char *pgm, const char **arg) | |
1420 | { | |
1421 | pid_t pid; | |
1422 | int status; | |
1423 | ||
1424 | fflush(NULL); | |
1425 | pid = fork(); | |
1426 | if (pid < 0) | |
1427 | die("unable to fork"); | |
1428 | if (!pid) { | |
1429 | execvp(pgm, (char *const*) arg); | |
1430 | exit(255); | |
1431 | } | |
1432 | ||
1433 | while (waitpid(pid, &status, 0) < 0) { | |
1434 | if (errno == EINTR) | |
1435 | continue; | |
1436 | return -1; | |
1437 | } | |
1438 | ||
1439 | /* Earlier we did not check the exit status because | |
1440 | * diff exits non-zero if files are different, and | |
1441 | * we are not interested in knowing that. It was a | |
1442 | * mistake which made it harder to quit a diff-* | |
1443 | * session that uses the git-apply-patch-script as | |
1444 | * the GIT_EXTERNAL_DIFF. A custom GIT_EXTERNAL_DIFF | |
1445 | * should also exit non-zero only when it wants to | |
1446 | * abort the entire diff-* session. | |
1447 | */ | |
1448 | if (WIFEXITED(status) && !WEXITSTATUS(status)) | |
1449 | return 0; | |
1450 | return -1; | |
1451 | } | |
1452 | ||
1453 | /* An external diff command takes: | |
1454 | * | |
1455 | * diff-cmd name infile1 infile1-sha1 infile1-mode \ | |
1456 | * infile2 infile2-sha1 infile2-mode [ rename-to ] | |
1457 | * | |
1458 | */ | |
1459 | static void run_external_diff(const char *pgm, | |
1460 | const char *name, | |
1461 | const char *other, | |
1462 | struct diff_filespec *one, | |
1463 | struct diff_filespec *two, | |
1464 | const char *xfrm_msg, | |
1465 | int complete_rewrite) | |
1466 | { | |
1467 | const char *spawn_arg[10]; | |
1468 | struct diff_tempfile *temp = diff_temp; | |
1469 | int retval; | |
1470 | static int atexit_asked = 0; | |
1471 | const char *othername; | |
1472 | const char **arg = &spawn_arg[0]; | |
1473 | ||
1474 | othername = (other? other : name); | |
1475 | if (one && two) { | |
1476 | prepare_temp_file(name, &temp[0], one); | |
1477 | prepare_temp_file(othername, &temp[1], two); | |
1478 | if (! atexit_asked && | |
1479 | (temp[0].name == temp[0].tmp_path || | |
1480 | temp[1].name == temp[1].tmp_path)) { | |
1481 | atexit_asked = 1; | |
1482 | atexit(remove_tempfile); | |
1483 | } | |
1484 | signal(SIGINT, remove_tempfile_on_signal); | |
1485 | } | |
1486 | ||
1487 | if (one && two) { | |
1488 | *arg++ = pgm; | |
1489 | *arg++ = name; | |
1490 | *arg++ = temp[0].name; | |
1491 | *arg++ = temp[0].hex; | |
1492 | *arg++ = temp[0].mode; | |
1493 | *arg++ = temp[1].name; | |
1494 | *arg++ = temp[1].hex; | |
1495 | *arg++ = temp[1].mode; | |
1496 | if (other) { | |
1497 | *arg++ = other; | |
1498 | *arg++ = xfrm_msg; | |
1499 | } | |
1500 | } else { | |
1501 | *arg++ = pgm; | |
1502 | *arg++ = name; | |
1503 | } | |
1504 | *arg = NULL; | |
1505 | retval = spawn_prog(pgm, spawn_arg); | |
1506 | remove_tempfile(); | |
1507 | if (retval) { | |
1508 | fprintf(stderr, "external diff died, stopping at %s.\n", name); | |
1509 | exit(1); | |
1510 | } | |
1511 | } | |
1512 | ||
1513 | static void run_diff_cmd(const char *pgm, | |
1514 | const char *name, | |
1515 | const char *other, | |
1516 | struct diff_filespec *one, | |
1517 | struct diff_filespec *two, | |
1518 | const char *xfrm_msg, | |
051308f6 | 1519 | struct diff_options *o, |
6973dcae JH |
1520 | int complete_rewrite) |
1521 | { | |
1522 | if (pgm) { | |
1523 | run_external_diff(pgm, name, other, one, two, xfrm_msg, | |
1524 | complete_rewrite); | |
1525 | return; | |
1526 | } | |
1527 | if (one && two) | |
1528 | builtin_diff(name, other ? other : name, | |
051308f6 | 1529 | one, two, xfrm_msg, o, complete_rewrite); |
6973dcae JH |
1530 | else |
1531 | printf("* Unmerged path %s\n", name); | |
1532 | } | |
1533 | ||
1534 | static void diff_fill_sha1_info(struct diff_filespec *one) | |
1535 | { | |
1536 | if (DIFF_FILE_VALID(one)) { | |
1537 | if (!one->sha1_valid) { | |
1538 | struct stat st; | |
1539 | if (lstat(one->path, &st) < 0) | |
1540 | die("stat %s", one->path); | |
1541 | if (index_path(one->sha1, one->path, &st, 0)) | |
1542 | die("cannot hash %s\n", one->path); | |
1543 | } | |
1544 | } | |
1545 | else | |
e702496e | 1546 | hashclr(one->sha1); |
6973dcae JH |
1547 | } |
1548 | ||
1549 | static void run_diff(struct diff_filepair *p, struct diff_options *o) | |
1550 | { | |
1551 | const char *pgm = external_diff(); | |
1552 | char msg[PATH_MAX*2+300], *xfrm_msg; | |
1553 | struct diff_filespec *one; | |
1554 | struct diff_filespec *two; | |
1555 | const char *name; | |
1556 | const char *other; | |
1557 | char *name_munged, *other_munged; | |
1558 | int complete_rewrite = 0; | |
1559 | int len; | |
1560 | ||
1561 | if (DIFF_PAIR_UNMERGED(p)) { | |
1562 | /* unmerged */ | |
051308f6 | 1563 | run_diff_cmd(pgm, p->one->path, NULL, NULL, NULL, NULL, o, 0); |
6973dcae JH |
1564 | return; |
1565 | } | |
1566 | ||
1567 | name = p->one->path; | |
1568 | other = (strcmp(name, p->two->path) ? p->two->path : NULL); | |
1569 | name_munged = quote_one(name); | |
1570 | other_munged = quote_one(other); | |
1571 | one = p->one; two = p->two; | |
1572 | ||
1573 | diff_fill_sha1_info(one); | |
1574 | diff_fill_sha1_info(two); | |
1575 | ||
1576 | len = 0; | |
1577 | switch (p->status) { | |
1578 | case DIFF_STATUS_COPIED: | |
1579 | len += snprintf(msg + len, sizeof(msg) - len, | |
1580 | "similarity index %d%%\n" | |
1581 | "copy from %s\n" | |
1582 | "copy to %s\n", | |
1583 | (int)(0.5 + p->score * 100.0/MAX_SCORE), | |
1584 | name_munged, other_munged); | |
1585 | break; | |
1586 | case DIFF_STATUS_RENAMED: | |
1587 | len += snprintf(msg + len, sizeof(msg) - len, | |
1588 | "similarity index %d%%\n" | |
1589 | "rename from %s\n" | |
1590 | "rename to %s\n", | |
1591 | (int)(0.5 + p->score * 100.0/MAX_SCORE), | |
1592 | name_munged, other_munged); | |
1593 | break; | |
1594 | case DIFF_STATUS_MODIFIED: | |
1595 | if (p->score) { | |
1596 | len += snprintf(msg + len, sizeof(msg) - len, | |
1597 | "dissimilarity index %d%%\n", | |
1598 | (int)(0.5 + p->score * | |
1599 | 100.0/MAX_SCORE)); | |
1600 | complete_rewrite = 1; | |
1601 | break; | |
1602 | } | |
1603 | /* fallthru */ | |
1604 | default: | |
1605 | /* nothing */ | |
1606 | ; | |
1607 | } | |
1608 | ||
a89fccd2 | 1609 | if (hashcmp(one->sha1, two->sha1)) { |
6973dcae | 1610 | int abbrev = o->full_index ? 40 : DEFAULT_ABBREV; |
6973dcae | 1611 | |
82793c55 JH |
1612 | if (o->binary) { |
1613 | mmfile_t mf; | |
1614 | if ((!fill_mmfile(&mf, one) && mmfile_is_binary(&mf)) || | |
1615 | (!fill_mmfile(&mf, two) && mmfile_is_binary(&mf))) | |
1616 | abbrev = 40; | |
1617 | } | |
6973dcae JH |
1618 | len += snprintf(msg + len, sizeof(msg) - len, |
1619 | "index %.*s..%.*s", | |
dcb3450f LT |
1620 | abbrev, sha1_to_hex(one->sha1), |
1621 | abbrev, sha1_to_hex(two->sha1)); | |
6973dcae JH |
1622 | if (one->mode == two->mode) |
1623 | len += snprintf(msg + len, sizeof(msg) - len, | |
1624 | " %06o", one->mode); | |
1625 | len += snprintf(msg + len, sizeof(msg) - len, "\n"); | |
1626 | } | |
1627 | ||
1628 | if (len) | |
1629 | msg[--len] = 0; | |
1630 | xfrm_msg = len ? msg : NULL; | |
1631 | ||
1632 | if (!pgm && | |
1633 | DIFF_FILE_VALID(one) && DIFF_FILE_VALID(two) && | |
1634 | (S_IFMT & one->mode) != (S_IFMT & two->mode)) { | |
1635 | /* a filepair that changes between file and symlink | |
1636 | * needs to be split into deletion and creation. | |
1637 | */ | |
1638 | struct diff_filespec *null = alloc_filespec(two->path); | |
051308f6 | 1639 | run_diff_cmd(NULL, name, other, one, null, xfrm_msg, o, 0); |
6973dcae JH |
1640 | free(null); |
1641 | null = alloc_filespec(one->path); | |
051308f6 | 1642 | run_diff_cmd(NULL, name, other, null, two, xfrm_msg, o, 0); |
6973dcae JH |
1643 | free(null); |
1644 | } | |
1645 | else | |
051308f6 | 1646 | run_diff_cmd(pgm, name, other, one, two, xfrm_msg, o, |
6973dcae JH |
1647 | complete_rewrite); |
1648 | ||
1649 | free(name_munged); | |
1650 | free(other_munged); | |
1651 | } | |
1652 | ||
1653 | static void run_diffstat(struct diff_filepair *p, struct diff_options *o, | |
1654 | struct diffstat_t *diffstat) | |
1655 | { | |
1656 | const char *name; | |
1657 | const char *other; | |
710158e3 | 1658 | int complete_rewrite = 0; |
6973dcae JH |
1659 | |
1660 | if (DIFF_PAIR_UNMERGED(p)) { | |
1661 | /* unmerged */ | |
0d21efa5 | 1662 | builtin_diffstat(p->one->path, NULL, NULL, NULL, diffstat, o, 0); |
6973dcae JH |
1663 | return; |
1664 | } | |
1665 | ||
1666 | name = p->one->path; | |
1667 | other = (strcmp(name, p->two->path) ? p->two->path : NULL); | |
1668 | ||
1669 | diff_fill_sha1_info(p->one); | |
1670 | diff_fill_sha1_info(p->two); | |
1671 | ||
710158e3 JH |
1672 | if (p->status == DIFF_STATUS_MODIFIED && p->score) |
1673 | complete_rewrite = 1; | |
0d21efa5 | 1674 | builtin_diffstat(name, other, p->one, p->two, diffstat, o, complete_rewrite); |
6973dcae JH |
1675 | } |
1676 | ||
88246898 JS |
1677 | static void run_checkdiff(struct diff_filepair *p, struct diff_options *o) |
1678 | { | |
1679 | const char *name; | |
1680 | const char *other; | |
1681 | ||
1682 | if (DIFF_PAIR_UNMERGED(p)) { | |
1683 | /* unmerged */ | |
1684 | return; | |
1685 | } | |
1686 | ||
1687 | name = p->one->path; | |
1688 | other = (strcmp(name, p->two->path) ? p->two->path : NULL); | |
1689 | ||
1690 | diff_fill_sha1_info(p->one); | |
1691 | diff_fill_sha1_info(p->two); | |
1692 | ||
1693 | builtin_checkdiff(name, other, p->one, p->two); | |
1694 | } | |
1695 | ||
6973dcae JH |
1696 | void diff_setup(struct diff_options *options) |
1697 | { | |
1698 | memset(options, 0, sizeof(*options)); | |
6973dcae JH |
1699 | options->line_termination = '\n'; |
1700 | options->break_opt = -1; | |
1701 | options->rename_limit = -1; | |
ee1e5412 | 1702 | options->context = 3; |
3969cf7d | 1703 | options->msg_sep = ""; |
6973dcae JH |
1704 | |
1705 | options->change = diff_change; | |
1706 | options->add_remove = diff_addremove; | |
801235c5 | 1707 | options->color_diff = diff_use_color_default; |
b68ea12e | 1708 | options->detect_rename = diff_detect_rename_default; |
6973dcae JH |
1709 | } |
1710 | ||
1711 | int diff_setup_done(struct diff_options *options) | |
1712 | { | |
d7de00f7 TH |
1713 | int count = 0; |
1714 | ||
1715 | if (options->output_format & DIFF_FORMAT_NAME) | |
1716 | count++; | |
1717 | if (options->output_format & DIFF_FORMAT_NAME_STATUS) | |
1718 | count++; | |
1719 | if (options->output_format & DIFF_FORMAT_CHECKDIFF) | |
1720 | count++; | |
1721 | if (options->output_format & DIFF_FORMAT_NO_OUTPUT) | |
1722 | count++; | |
1723 | if (count > 1) | |
1724 | die("--name-only, --name-status, --check and -s are mutually exclusive"); | |
1725 | ||
03b9d560 JH |
1726 | if (options->find_copies_harder) |
1727 | options->detect_rename = DIFF_DETECT_COPY; | |
1728 | ||
c6744349 TH |
1729 | if (options->output_format & (DIFF_FORMAT_NAME | |
1730 | DIFF_FORMAT_NAME_STATUS | | |
1731 | DIFF_FORMAT_CHECKDIFF | | |
1732 | DIFF_FORMAT_NO_OUTPUT)) | |
1733 | options->output_format &= ~(DIFF_FORMAT_RAW | | |
1734 | DIFF_FORMAT_DIFFSTAT | | |
1735 | DIFF_FORMAT_SUMMARY | | |
1736 | DIFF_FORMAT_PATCH); | |
1737 | ||
6973dcae JH |
1738 | /* |
1739 | * These cases always need recursive; we do not drop caller-supplied | |
1740 | * recursive bits for other formats here. | |
1741 | */ | |
c6744349 TH |
1742 | if (options->output_format & (DIFF_FORMAT_PATCH | |
1743 | DIFF_FORMAT_DIFFSTAT | | |
1744 | DIFF_FORMAT_CHECKDIFF)) | |
6973dcae | 1745 | options->recursive = 1; |
5e363541 | 1746 | /* |
3969cf7d | 1747 | * Also pickaxe would not work very well if you do not say recursive |
5e363541 | 1748 | */ |
3969cf7d JH |
1749 | if (options->pickaxe) |
1750 | options->recursive = 1; | |
5e363541 | 1751 | |
6973dcae JH |
1752 | if (options->detect_rename && options->rename_limit < 0) |
1753 | options->rename_limit = diff_rename_limit_default; | |
1754 | if (options->setup & DIFF_SETUP_USE_CACHE) { | |
1755 | if (!active_cache) | |
1756 | /* read-cache does not die even when it fails | |
1757 | * so it is safe for us to do this here. Also | |
1758 | * it does not smudge active_cache or active_nr | |
1759 | * when it fails, so we do not have to worry about | |
1760 | * cleaning it up ourselves either. | |
1761 | */ | |
1762 | read_cache(); | |
1763 | } | |
1764 | if (options->setup & DIFF_SETUP_USE_SIZE_CACHE) | |
1765 | use_size_cache = 1; | |
1766 | if (options->abbrev <= 0 || 40 < options->abbrev) | |
1767 | options->abbrev = 40; /* full */ | |
1768 | ||
1769 | return 0; | |
1770 | } | |
1771 | ||
d2543b8e | 1772 | static int opt_arg(const char *arg, int arg_short, const char *arg_long, int *val) |
ee1e5412 LT |
1773 | { |
1774 | char c, *eq; | |
1775 | int len; | |
1776 | ||
1777 | if (*arg != '-') | |
1778 | return 0; | |
1779 | c = *++arg; | |
1780 | if (!c) | |
1781 | return 0; | |
1782 | if (c == arg_short) { | |
1783 | c = *++arg; | |
1784 | if (!c) | |
1785 | return 1; | |
1786 | if (val && isdigit(c)) { | |
1787 | char *end; | |
1788 | int n = strtoul(arg, &end, 10); | |
1789 | if (*end) | |
1790 | return 0; | |
1791 | *val = n; | |
1792 | return 1; | |
1793 | } | |
1794 | return 0; | |
1795 | } | |
1796 | if (c != '-') | |
1797 | return 0; | |
1798 | arg++; | |
1799 | eq = strchr(arg, '='); | |
1800 | if (eq) | |
1801 | len = eq - arg; | |
1802 | else | |
1803 | len = strlen(arg); | |
1804 | if (!len || strncmp(arg, arg_long, len)) | |
1805 | return 0; | |
1806 | if (eq) { | |
1807 | int n; | |
1808 | char *end; | |
1809 | if (!isdigit(*++eq)) | |
1810 | return 0; | |
1811 | n = strtoul(eq, &end, 10); | |
1812 | if (*end) | |
1813 | return 0; | |
1814 | *val = n; | |
1815 | } | |
1816 | return 1; | |
1817 | } | |
1818 | ||
6973dcae JH |
1819 | int diff_opt_parse(struct diff_options *options, const char **av, int ac) |
1820 | { | |
1821 | const char *arg = av[0]; | |
1822 | if (!strcmp(arg, "-p") || !strcmp(arg, "-u")) | |
c6744349 | 1823 | options->output_format |= DIFF_FORMAT_PATCH; |
ee1e5412 | 1824 | else if (opt_arg(arg, 'U', "unified", &options->context)) |
c6744349 | 1825 | options->output_format |= DIFF_FORMAT_PATCH; |
a610786f TH |
1826 | else if (!strcmp(arg, "--raw")) |
1827 | options->output_format |= DIFF_FORMAT_RAW; | |
6973dcae | 1828 | else if (!strcmp(arg, "--patch-with-raw")) { |
c6744349 | 1829 | options->output_format |= DIFF_FORMAT_PATCH | DIFF_FORMAT_RAW; |
6973dcae | 1830 | } |
5c5b2ea9 LT |
1831 | else if (!strncmp(arg, "--stat", 6)) { |
1832 | char *end; | |
1833 | int width = options->stat_width; | |
1834 | int name_width = options->stat_name_width; | |
1835 | arg += 6; | |
1836 | end = (char *)arg; | |
1837 | ||
1838 | switch (*arg) { | |
1839 | case '-': | |
1840 | if (!strncmp(arg, "-width=", 7)) | |
1841 | width = strtoul(arg + 7, &end, 10); | |
1842 | else if (!strncmp(arg, "-name-width=", 12)) | |
1843 | name_width = strtoul(arg + 12, &end, 10); | |
1844 | break; | |
1845 | case '=': | |
1846 | width = strtoul(arg+1, &end, 10); | |
1847 | if (*end == ',') | |
1848 | name_width = strtoul(end+1, &end, 10); | |
1849 | } | |
1850 | ||
1851 | /* Important! This checks all the error cases! */ | |
1852 | if (*end) | |
1853 | return 0; | |
c6744349 | 1854 | options->output_format |= DIFF_FORMAT_DIFFSTAT; |
5c5b2ea9 LT |
1855 | options->stat_name_width = name_width; |
1856 | options->stat_width = width; | |
a2540023 | 1857 | } |
88246898 | 1858 | else if (!strcmp(arg, "--check")) |
c6744349 | 1859 | options->output_format |= DIFF_FORMAT_CHECKDIFF; |
4bbd261b | 1860 | else if (!strcmp(arg, "--summary")) |
c6744349 | 1861 | options->output_format |= DIFF_FORMAT_SUMMARY; |
6973dcae | 1862 | else if (!strcmp(arg, "--patch-with-stat")) { |
c6744349 | 1863 | options->output_format |= DIFF_FORMAT_PATCH | DIFF_FORMAT_DIFFSTAT; |
6973dcae JH |
1864 | } |
1865 | else if (!strcmp(arg, "-z")) | |
1866 | options->line_termination = 0; | |
1867 | else if (!strncmp(arg, "-l", 2)) | |
1868 | options->rename_limit = strtoul(arg+2, NULL, 10); | |
1869 | else if (!strcmp(arg, "--full-index")) | |
1870 | options->full_index = 1; | |
0660626c | 1871 | else if (!strcmp(arg, "--binary")) { |
c6744349 | 1872 | options->output_format |= DIFF_FORMAT_PATCH; |
82793c55 | 1873 | options->binary = 1; |
0660626c | 1874 | } |
63ac4501 | 1875 | else if (!strcmp(arg, "-a") || !strcmp(arg, "--text")) { |
6d64ea96 SF |
1876 | options->text = 1; |
1877 | } | |
6973dcae | 1878 | else if (!strcmp(arg, "--name-only")) |
c6744349 | 1879 | options->output_format |= DIFF_FORMAT_NAME; |
6973dcae | 1880 | else if (!strcmp(arg, "--name-status")) |
c6744349 | 1881 | options->output_format |= DIFF_FORMAT_NAME_STATUS; |
6973dcae JH |
1882 | else if (!strcmp(arg, "-R")) |
1883 | options->reverse_diff = 1; | |
1884 | else if (!strncmp(arg, "-S", 2)) | |
1885 | options->pickaxe = arg + 2; | |
c6744349 TH |
1886 | else if (!strcmp(arg, "-s")) { |
1887 | options->output_format |= DIFF_FORMAT_NO_OUTPUT; | |
1888 | } | |
6973dcae JH |
1889 | else if (!strncmp(arg, "-O", 2)) |
1890 | options->orderfile = arg + 2; | |
1891 | else if (!strncmp(arg, "--diff-filter=", 14)) | |
1892 | options->filter = arg + 14; | |
1893 | else if (!strcmp(arg, "--pickaxe-all")) | |
1894 | options->pickaxe_opts = DIFF_PICKAXE_ALL; | |
1895 | else if (!strcmp(arg, "--pickaxe-regex")) | |
1896 | options->pickaxe_opts = DIFF_PICKAXE_REGEX; | |
1897 | else if (!strncmp(arg, "-B", 2)) { | |
1898 | if ((options->break_opt = | |
1899 | diff_scoreopt_parse(arg)) == -1) | |
1900 | return -1; | |
1901 | } | |
1902 | else if (!strncmp(arg, "-M", 2)) { | |
1903 | if ((options->rename_score = | |
1904 | diff_scoreopt_parse(arg)) == -1) | |
1905 | return -1; | |
1906 | options->detect_rename = DIFF_DETECT_RENAME; | |
1907 | } | |
1908 | else if (!strncmp(arg, "-C", 2)) { | |
1909 | if ((options->rename_score = | |
1910 | diff_scoreopt_parse(arg)) == -1) | |
1911 | return -1; | |
1912 | options->detect_rename = DIFF_DETECT_COPY; | |
1913 | } | |
1914 | else if (!strcmp(arg, "--find-copies-harder")) | |
1915 | options->find_copies_harder = 1; | |
1916 | else if (!strcmp(arg, "--abbrev")) | |
1917 | options->abbrev = DEFAULT_ABBREV; | |
1918 | else if (!strncmp(arg, "--abbrev=", 9)) { | |
1919 | options->abbrev = strtoul(arg + 9, NULL, 10); | |
1920 | if (options->abbrev < MINIMUM_ABBREV) | |
1921 | options->abbrev = MINIMUM_ABBREV; | |
1922 | else if (40 < options->abbrev) | |
1923 | options->abbrev = 40; | |
1924 | } | |
cd112cef JS |
1925 | else if (!strcmp(arg, "--color")) |
1926 | options->color_diff = 1; | |
fef88bb0 JH |
1927 | else if (!strcmp(arg, "--no-color")) |
1928 | options->color_diff = 0; | |
0d21efa5 JS |
1929 | else if (!strcmp(arg, "-w") || !strcmp(arg, "--ignore-all-space")) |
1930 | options->xdl_opts |= XDF_IGNORE_WHITESPACE; | |
1931 | else if (!strcmp(arg, "-b") || !strcmp(arg, "--ignore-space-change")) | |
1932 | options->xdl_opts |= XDF_IGNORE_WHITESPACE_CHANGE; | |
f59a59e2 JS |
1933 | else if (!strcmp(arg, "--color-words")) |
1934 | options->color_diff = options->color_diff_words = 1; | |
b68ea12e EW |
1935 | else if (!strcmp(arg, "--no-renames")) |
1936 | options->detect_rename = 0; | |
6973dcae JH |
1937 | else |
1938 | return 0; | |
1939 | return 1; | |
1940 | } | |
1941 | ||
1942 | static int parse_num(const char **cp_p) | |
1943 | { | |
1944 | unsigned long num, scale; | |
1945 | int ch, dot; | |
1946 | const char *cp = *cp_p; | |
1947 | ||
1948 | num = 0; | |
1949 | scale = 1; | |
1950 | dot = 0; | |
1951 | for(;;) { | |
1952 | ch = *cp; | |
1953 | if ( !dot && ch == '.' ) { | |
1954 | scale = 1; | |
1955 | dot = 1; | |
1956 | } else if ( ch == '%' ) { | |
1957 | scale = dot ? scale*100 : 100; | |
1958 | cp++; /* % is always at the end */ | |
1959 | break; | |
1960 | } else if ( ch >= '0' && ch <= '9' ) { | |
1961 | if ( scale < 100000 ) { | |
1962 | scale *= 10; | |
1963 | num = (num*10) + (ch-'0'); | |
1964 | } | |
1965 | } else { | |
1966 | break; | |
1967 | } | |
1968 | cp++; | |
1969 | } | |
1970 | *cp_p = cp; | |
1971 | ||
1972 | /* user says num divided by scale and we say internally that | |
1973 | * is MAX_SCORE * num / scale. | |
1974 | */ | |
1975 | return (num >= scale) ? MAX_SCORE : (MAX_SCORE * num / scale); | |
1976 | } | |
1977 | ||
1978 | int diff_scoreopt_parse(const char *opt) | |
1979 | { | |
1980 | int opt1, opt2, cmd; | |
1981 | ||
1982 | if (*opt++ != '-') | |
1983 | return -1; | |
1984 | cmd = *opt++; | |
1985 | if (cmd != 'M' && cmd != 'C' && cmd != 'B') | |
1986 | return -1; /* that is not a -M, -C nor -B option */ | |
1987 | ||
1988 | opt1 = parse_num(&opt); | |
1989 | if (cmd != 'B') | |
1990 | opt2 = 0; | |
1991 | else { | |
1992 | if (*opt == 0) | |
1993 | opt2 = 0; | |
1994 | else if (*opt != '/') | |
1995 | return -1; /* we expect -B80/99 or -B80 */ | |
1996 | else { | |
1997 | opt++; | |
1998 | opt2 = parse_num(&opt); | |
1999 | } | |
2000 | } | |
2001 | if (*opt != 0) | |
2002 | return -1; | |
2003 | return opt1 | (opt2 << 16); | |
2004 | } | |
2005 | ||
2006 | struct diff_queue_struct diff_queued_diff; | |
2007 | ||
2008 | void diff_q(struct diff_queue_struct *queue, struct diff_filepair *dp) | |
2009 | { | |
2010 | if (queue->alloc <= queue->nr) { | |
2011 | queue->alloc = alloc_nr(queue->alloc); | |
2012 | queue->queue = xrealloc(queue->queue, | |
2013 | sizeof(dp) * queue->alloc); | |
2014 | } | |
2015 | queue->queue[queue->nr++] = dp; | |
2016 | } | |
2017 | ||
2018 | struct diff_filepair *diff_queue(struct diff_queue_struct *queue, | |
2019 | struct diff_filespec *one, | |
2020 | struct diff_filespec *two) | |
2021 | { | |
ef677686 | 2022 | struct diff_filepair *dp = xcalloc(1, sizeof(*dp)); |
6973dcae JH |
2023 | dp->one = one; |
2024 | dp->two = two; | |
6973dcae JH |
2025 | if (queue) |
2026 | diff_q(queue, dp); | |
2027 | return dp; | |
2028 | } | |
2029 | ||
2030 | void diff_free_filepair(struct diff_filepair *p) | |
2031 | { | |
2032 | diff_free_filespec_data(p->one); | |
2033 | diff_free_filespec_data(p->two); | |
2034 | free(p->one); | |
2035 | free(p->two); | |
2036 | free(p); | |
2037 | } | |
2038 | ||
2039 | /* This is different from find_unique_abbrev() in that | |
2040 | * it stuffs the result with dots for alignment. | |
2041 | */ | |
2042 | const char *diff_unique_abbrev(const unsigned char *sha1, int len) | |
2043 | { | |
2044 | int abblen; | |
2045 | const char *abbrev; | |
2046 | if (len == 40) | |
2047 | return sha1_to_hex(sha1); | |
2048 | ||
2049 | abbrev = find_unique_abbrev(sha1, len); | |
2050 | if (!abbrev) | |
2051 | return sha1_to_hex(sha1); | |
2052 | abblen = strlen(abbrev); | |
2053 | if (abblen < 37) { | |
2054 | static char hex[41]; | |
2055 | if (len < abblen && abblen <= len + 2) | |
2056 | sprintf(hex, "%s%.*s", abbrev, len+3-abblen, ".."); | |
2057 | else | |
2058 | sprintf(hex, "%s...", abbrev); | |
2059 | return hex; | |
2060 | } | |
2061 | return sha1_to_hex(sha1); | |
2062 | } | |
2063 | ||
2064 | static void diff_flush_raw(struct diff_filepair *p, | |
c6744349 | 2065 | struct diff_options *options) |
6973dcae JH |
2066 | { |
2067 | int two_paths; | |
2068 | char status[10]; | |
2069 | int abbrev = options->abbrev; | |
2070 | const char *path_one, *path_two; | |
c6744349 TH |
2071 | int inter_name_termination = '\t'; |
2072 | int line_termination = options->line_termination; | |
2073 | ||
2074 | if (!line_termination) | |
2075 | inter_name_termination = 0; | |
6973dcae JH |
2076 | |
2077 | path_one = p->one->path; | |
2078 | path_two = p->two->path; | |
2079 | if (line_termination) { | |
2080 | path_one = quote_one(path_one); | |
2081 | path_two = quote_one(path_two); | |
2082 | } | |
2083 | ||
2084 | if (p->score) | |
2085 | sprintf(status, "%c%03d", p->status, | |
2086 | (int)(0.5 + p->score * 100.0/MAX_SCORE)); | |
2087 | else { | |
2088 | status[0] = p->status; | |
2089 | status[1] = 0; | |
2090 | } | |
2091 | switch (p->status) { | |
2092 | case DIFF_STATUS_COPIED: | |
2093 | case DIFF_STATUS_RENAMED: | |
2094 | two_paths = 1; | |
2095 | break; | |
2096 | case DIFF_STATUS_ADDED: | |
2097 | case DIFF_STATUS_DELETED: | |
2098 | two_paths = 0; | |
2099 | break; | |
2100 | default: | |
2101 | two_paths = 0; | |
2102 | break; | |
2103 | } | |
c6744349 | 2104 | if (!(options->output_format & DIFF_FORMAT_NAME_STATUS)) { |
6973dcae JH |
2105 | printf(":%06o %06o %s ", |
2106 | p->one->mode, p->two->mode, | |
2107 | diff_unique_abbrev(p->one->sha1, abbrev)); | |
2108 | printf("%s ", | |
2109 | diff_unique_abbrev(p->two->sha1, abbrev)); | |
2110 | } | |
2111 | printf("%s%c%s", status, inter_name_termination, path_one); | |
2112 | if (two_paths) | |
2113 | printf("%c%s", inter_name_termination, path_two); | |
2114 | putchar(line_termination); | |
2115 | if (path_one != p->one->path) | |
2116 | free((void*)path_one); | |
2117 | if (path_two != p->two->path) | |
2118 | free((void*)path_two); | |
2119 | } | |
2120 | ||
d2543b8e | 2121 | static void diff_flush_name(struct diff_filepair *p, int line_termination) |
6973dcae JH |
2122 | { |
2123 | char *path = p->two->path; | |
2124 | ||
2125 | if (line_termination) | |
2126 | path = quote_one(p->two->path); | |
6973dcae JH |
2127 | printf("%s%c", path, line_termination); |
2128 | if (p->two->path != path) | |
2129 | free(path); | |
2130 | } | |
2131 | ||
2132 | int diff_unmodified_pair(struct diff_filepair *p) | |
2133 | { | |
2134 | /* This function is written stricter than necessary to support | |
2135 | * the currently implemented transformers, but the idea is to | |
2136 | * let transformers to produce diff_filepairs any way they want, | |
2137 | * and filter and clean them up here before producing the output. | |
2138 | */ | |
2139 | struct diff_filespec *one, *two; | |
2140 | ||
2141 | if (DIFF_PAIR_UNMERGED(p)) | |
2142 | return 0; /* unmerged is interesting */ | |
2143 | ||
2144 | one = p->one; | |
2145 | two = p->two; | |
2146 | ||
2147 | /* deletion, addition, mode or type change | |
2148 | * and rename are all interesting. | |
2149 | */ | |
2150 | if (DIFF_FILE_VALID(one) != DIFF_FILE_VALID(two) || | |
2151 | DIFF_PAIR_MODE_CHANGED(p) || | |
2152 | strcmp(one->path, two->path)) | |
2153 | return 0; | |
2154 | ||
2155 | /* both are valid and point at the same path. that is, we are | |
2156 | * dealing with a change. | |
2157 | */ | |
2158 | if (one->sha1_valid && two->sha1_valid && | |
a89fccd2 | 2159 | !hashcmp(one->sha1, two->sha1)) |
6973dcae JH |
2160 | return 1; /* no change */ |
2161 | if (!one->sha1_valid && !two->sha1_valid) | |
2162 | return 1; /* both look at the same file on the filesystem. */ | |
2163 | return 0; | |
2164 | } | |
2165 | ||
2166 | static void diff_flush_patch(struct diff_filepair *p, struct diff_options *o) | |
2167 | { | |
2168 | if (diff_unmodified_pair(p)) | |
2169 | return; | |
2170 | ||
2171 | if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) || | |
2172 | (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode))) | |
2173 | return; /* no tree diffs in patch format */ | |
2174 | ||
2175 | run_diff(p, o); | |
2176 | } | |
2177 | ||
2178 | static void diff_flush_stat(struct diff_filepair *p, struct diff_options *o, | |
2179 | struct diffstat_t *diffstat) | |
2180 | { | |
2181 | if (diff_unmodified_pair(p)) | |
2182 | return; | |
2183 | ||
2184 | if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) || | |
2185 | (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode))) | |
2186 | return; /* no tree diffs in patch format */ | |
2187 | ||
2188 | run_diffstat(p, o, diffstat); | |
2189 | } | |
2190 | ||
88246898 JS |
2191 | static void diff_flush_checkdiff(struct diff_filepair *p, |
2192 | struct diff_options *o) | |
2193 | { | |
2194 | if (diff_unmodified_pair(p)) | |
2195 | return; | |
2196 | ||
2197 | if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) || | |
2198 | (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode))) | |
2199 | return; /* no tree diffs in patch format */ | |
2200 | ||
2201 | run_checkdiff(p, o); | |
2202 | } | |
2203 | ||
6973dcae JH |
2204 | int diff_queue_is_empty(void) |
2205 | { | |
2206 | struct diff_queue_struct *q = &diff_queued_diff; | |
2207 | int i; | |
2208 | for (i = 0; i < q->nr; i++) | |
2209 | if (!diff_unmodified_pair(q->queue[i])) | |
2210 | return 0; | |
2211 | return 1; | |
2212 | } | |
2213 | ||
2214 | #if DIFF_DEBUG | |
2215 | void diff_debug_filespec(struct diff_filespec *s, int x, const char *one) | |
2216 | { | |
2217 | fprintf(stderr, "queue[%d] %s (%s) %s %06o %s\n", | |
2218 | x, one ? one : "", | |
2219 | s->path, | |
2220 | DIFF_FILE_VALID(s) ? "valid" : "invalid", | |
2221 | s->mode, | |
2222 | s->sha1_valid ? sha1_to_hex(s->sha1) : ""); | |
2223 | fprintf(stderr, "queue[%d] %s size %lu flags %d\n", | |
2224 | x, one ? one : "", | |
2225 | s->size, s->xfrm_flags); | |
2226 | } | |
2227 | ||
2228 | void diff_debug_filepair(const struct diff_filepair *p, int i) | |
2229 | { | |
2230 | diff_debug_filespec(p->one, i, "one"); | |
2231 | diff_debug_filespec(p->two, i, "two"); | |
2232 | fprintf(stderr, "score %d, status %c stays %d broken %d\n", | |
2233 | p->score, p->status ? p->status : '?', | |
2234 | p->source_stays, p->broken_pair); | |
2235 | } | |
2236 | ||
2237 | void diff_debug_queue(const char *msg, struct diff_queue_struct *q) | |
2238 | { | |
2239 | int i; | |
2240 | if (msg) | |
2241 | fprintf(stderr, "%s\n", msg); | |
2242 | fprintf(stderr, "q->nr = %d\n", q->nr); | |
2243 | for (i = 0; i < q->nr; i++) { | |
2244 | struct diff_filepair *p = q->queue[i]; | |
2245 | diff_debug_filepair(p, i); | |
2246 | } | |
2247 | } | |
2248 | #endif | |
2249 | ||
2250 | static void diff_resolve_rename_copy(void) | |
2251 | { | |
2252 | int i, j; | |
2253 | struct diff_filepair *p, *pp; | |
2254 | struct diff_queue_struct *q = &diff_queued_diff; | |
2255 | ||
2256 | diff_debug_queue("resolve-rename-copy", q); | |
2257 | ||
2258 | for (i = 0; i < q->nr; i++) { | |
2259 | p = q->queue[i]; | |
2260 | p->status = 0; /* undecided */ | |
2261 | if (DIFF_PAIR_UNMERGED(p)) | |
2262 | p->status = DIFF_STATUS_UNMERGED; | |
2263 | else if (!DIFF_FILE_VALID(p->one)) | |
2264 | p->status = DIFF_STATUS_ADDED; | |
2265 | else if (!DIFF_FILE_VALID(p->two)) | |
2266 | p->status = DIFF_STATUS_DELETED; | |
2267 | else if (DIFF_PAIR_TYPE_CHANGED(p)) | |
2268 | p->status = DIFF_STATUS_TYPE_CHANGED; | |
2269 | ||
2270 | /* from this point on, we are dealing with a pair | |
2271 | * whose both sides are valid and of the same type, i.e. | |
2272 | * either in-place edit or rename/copy edit. | |
2273 | */ | |
2274 | else if (DIFF_PAIR_RENAME(p)) { | |
2275 | if (p->source_stays) { | |
2276 | p->status = DIFF_STATUS_COPIED; | |
2277 | continue; | |
2278 | } | |
2279 | /* See if there is some other filepair that | |
2280 | * copies from the same source as us. If so | |
2281 | * we are a copy. Otherwise we are either a | |
2282 | * copy if the path stays, or a rename if it | |
2283 | * does not, but we already handled "stays" case. | |
2284 | */ | |
2285 | for (j = i + 1; j < q->nr; j++) { | |
2286 | pp = q->queue[j]; | |
2287 | if (strcmp(pp->one->path, p->one->path)) | |
2288 | continue; /* not us */ | |
2289 | if (!DIFF_PAIR_RENAME(pp)) | |
2290 | continue; /* not a rename/copy */ | |
2291 | /* pp is a rename/copy from the same source */ | |
2292 | p->status = DIFF_STATUS_COPIED; | |
2293 | break; | |
2294 | } | |
2295 | if (!p->status) | |
2296 | p->status = DIFF_STATUS_RENAMED; | |
2297 | } | |
a89fccd2 | 2298 | else if (hashcmp(p->one->sha1, p->two->sha1) || |
6973dcae JH |
2299 | p->one->mode != p->two->mode) |
2300 | p->status = DIFF_STATUS_MODIFIED; | |
2301 | else { | |
2302 | /* This is a "no-change" entry and should not | |
2303 | * happen anymore, but prepare for broken callers. | |
2304 | */ | |
2305 | error("feeding unmodified %s to diffcore", | |
2306 | p->one->path); | |
2307 | p->status = DIFF_STATUS_UNKNOWN; | |
2308 | } | |
2309 | } | |
2310 | diff_debug_queue("resolve-rename-copy done", q); | |
2311 | } | |
2312 | ||
c6744349 | 2313 | static int check_pair_status(struct diff_filepair *p) |
6973dcae | 2314 | { |
6973dcae JH |
2315 | switch (p->status) { |
2316 | case DIFF_STATUS_UNKNOWN: | |
c6744349 | 2317 | return 0; |
6973dcae JH |
2318 | case 0: |
2319 | die("internal error in diff-resolve-rename-copy"); | |
6973dcae | 2320 | default: |
c6744349 | 2321 | return 1; |
6973dcae JH |
2322 | } |
2323 | } | |
2324 | ||
c6744349 TH |
2325 | static void flush_one_pair(struct diff_filepair *p, struct diff_options *opt) |
2326 | { | |
2327 | int fmt = opt->output_format; | |
2328 | ||
2329 | if (fmt & DIFF_FORMAT_CHECKDIFF) | |
2330 | diff_flush_checkdiff(p, opt); | |
2331 | else if (fmt & (DIFF_FORMAT_RAW | DIFF_FORMAT_NAME_STATUS)) | |
2332 | diff_flush_raw(p, opt); | |
2333 | else if (fmt & DIFF_FORMAT_NAME) | |
2334 | diff_flush_name(p, opt->line_termination); | |
2335 | } | |
2336 | ||
4bbd261b SE |
2337 | static void show_file_mode_name(const char *newdelete, struct diff_filespec *fs) |
2338 | { | |
2339 | if (fs->mode) | |
2340 | printf(" %s mode %06o %s\n", newdelete, fs->mode, fs->path); | |
2341 | else | |
2342 | printf(" %s %s\n", newdelete, fs->path); | |
2343 | } | |
2344 | ||
2345 | ||
2346 | static void show_mode_change(struct diff_filepair *p, int show_name) | |
2347 | { | |
2348 | if (p->one->mode && p->two->mode && p->one->mode != p->two->mode) { | |
2349 | if (show_name) | |
2350 | printf(" mode change %06o => %06o %s\n", | |
2351 | p->one->mode, p->two->mode, p->two->path); | |
2352 | else | |
2353 | printf(" mode change %06o => %06o\n", | |
2354 | p->one->mode, p->two->mode); | |
2355 | } | |
2356 | } | |
2357 | ||
2358 | static void show_rename_copy(const char *renamecopy, struct diff_filepair *p) | |
2359 | { | |
2360 | const char *old, *new; | |
2361 | ||
2362 | /* Find common prefix */ | |
2363 | old = p->one->path; | |
2364 | new = p->two->path; | |
2365 | while (1) { | |
2366 | const char *slash_old, *slash_new; | |
2367 | slash_old = strchr(old, '/'); | |
2368 | slash_new = strchr(new, '/'); | |
2369 | if (!slash_old || | |
2370 | !slash_new || | |
2371 | slash_old - old != slash_new - new || | |
2372 | memcmp(old, new, slash_new - new)) | |
2373 | break; | |
2374 | old = slash_old + 1; | |
2375 | new = slash_new + 1; | |
2376 | } | |
2377 | /* p->one->path thru old is the common prefix, and old and new | |
2378 | * through the end of names are renames | |
2379 | */ | |
2380 | if (old != p->one->path) | |
2381 | printf(" %s %.*s{%s => %s} (%d%%)\n", renamecopy, | |
2382 | (int)(old - p->one->path), p->one->path, | |
2383 | old, new, (int)(0.5 + p->score * 100.0/MAX_SCORE)); | |
2384 | else | |
2385 | printf(" %s %s => %s (%d%%)\n", renamecopy, | |
2386 | p->one->path, p->two->path, | |
2387 | (int)(0.5 + p->score * 100.0/MAX_SCORE)); | |
2388 | show_mode_change(p, 0); | |
2389 | } | |
2390 | ||
2391 | static void diff_summary(struct diff_filepair *p) | |
2392 | { | |
2393 | switch(p->status) { | |
2394 | case DIFF_STATUS_DELETED: | |
2395 | show_file_mode_name("delete", p->one); | |
2396 | break; | |
2397 | case DIFF_STATUS_ADDED: | |
2398 | show_file_mode_name("create", p->two); | |
2399 | break; | |
2400 | case DIFF_STATUS_COPIED: | |
2401 | show_rename_copy("copy", p); | |
2402 | break; | |
2403 | case DIFF_STATUS_RENAMED: | |
2404 | show_rename_copy("rename", p); | |
2405 | break; | |
2406 | default: | |
2407 | if (p->score) { | |
2408 | printf(" rewrite %s (%d%%)\n", p->two->path, | |
2409 | (int)(0.5 + p->score * 100.0/MAX_SCORE)); | |
2410 | show_mode_change(p, 0); | |
2411 | } else show_mode_change(p, 1); | |
2412 | break; | |
2413 | } | |
2414 | } | |
2415 | ||
fcb3d0ad JS |
2416 | struct patch_id_t { |
2417 | struct xdiff_emit_state xm; | |
2418 | SHA_CTX *ctx; | |
2419 | int patchlen; | |
2420 | }; | |
2421 | ||
2422 | static int remove_space(char *line, int len) | |
2423 | { | |
2424 | int i; | |
2425 | char *dst = line; | |
2426 | unsigned char c; | |
2427 | ||
2428 | for (i = 0; i < len; i++) | |
2429 | if (!isspace((c = line[i]))) | |
2430 | *dst++ = c; | |
2431 | ||
2432 | return dst - line; | |
2433 | } | |
2434 | ||
2435 | static void patch_id_consume(void *priv, char *line, unsigned long len) | |
2436 | { | |
2437 | struct patch_id_t *data = priv; | |
2438 | int new_len; | |
2439 | ||
2440 | /* Ignore line numbers when computing the SHA1 of the patch */ | |
2441 | if (!strncmp(line, "@@ -", 4)) | |
2442 | return; | |
2443 | ||
2444 | new_len = remove_space(line, len); | |
2445 | ||
2446 | SHA1_Update(data->ctx, line, new_len); | |
2447 | data->patchlen += new_len; | |
2448 | } | |
2449 | ||
2450 | /* returns 0 upon success, and writes result into sha1 */ | |
2451 | static int diff_get_patch_id(struct diff_options *options, unsigned char *sha1) | |
2452 | { | |
2453 | struct diff_queue_struct *q = &diff_queued_diff; | |
2454 | int i; | |
2455 | SHA_CTX ctx; | |
2456 | struct patch_id_t data; | |
2457 | char buffer[PATH_MAX * 4 + 20]; | |
2458 | ||
2459 | SHA1_Init(&ctx); | |
2460 | memset(&data, 0, sizeof(struct patch_id_t)); | |
2461 | data.ctx = &ctx; | |
2462 | data.xm.consume = patch_id_consume; | |
2463 | ||
2464 | for (i = 0; i < q->nr; i++) { | |
2465 | xpparam_t xpp; | |
2466 | xdemitconf_t xecfg; | |
2467 | xdemitcb_t ecb; | |
2468 | mmfile_t mf1, mf2; | |
2469 | struct diff_filepair *p = q->queue[i]; | |
2470 | int len1, len2; | |
2471 | ||
2472 | if (p->status == 0) | |
2473 | return error("internal diff status error"); | |
2474 | if (p->status == DIFF_STATUS_UNKNOWN) | |
2475 | continue; | |
2476 | if (diff_unmodified_pair(p)) | |
2477 | continue; | |
2478 | if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) || | |
2479 | (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode))) | |
2480 | continue; | |
2481 | if (DIFF_PAIR_UNMERGED(p)) | |
2482 | continue; | |
2483 | ||
2484 | diff_fill_sha1_info(p->one); | |
2485 | diff_fill_sha1_info(p->two); | |
2486 | if (fill_mmfile(&mf1, p->one) < 0 || | |
2487 | fill_mmfile(&mf2, p->two) < 0) | |
2488 | return error("unable to read files to diff"); | |
2489 | ||
2490 | /* Maybe hash p->two? into the patch id? */ | |
2491 | if (mmfile_is_binary(&mf2)) | |
2492 | continue; | |
2493 | ||
2494 | len1 = remove_space(p->one->path, strlen(p->one->path)); | |
2495 | len2 = remove_space(p->two->path, strlen(p->two->path)); | |
2496 | if (p->one->mode == 0) | |
2497 | len1 = snprintf(buffer, sizeof(buffer), | |
2498 | "diff--gita/%.*sb/%.*s" | |
2499 | "newfilemode%06o" | |
2500 | "---/dev/null" | |
2501 | "+++b/%.*s", | |
2502 | len1, p->one->path, | |
2503 | len2, p->two->path, | |
2504 | p->two->mode, | |
2505 | len2, p->two->path); | |
2506 | else if (p->two->mode == 0) | |
2507 | len1 = snprintf(buffer, sizeof(buffer), | |
2508 | "diff--gita/%.*sb/%.*s" | |
2509 | "deletedfilemode%06o" | |
2510 | "---a/%.*s" | |
2511 | "+++/dev/null", | |
2512 | len1, p->one->path, | |
2513 | len2, p->two->path, | |
2514 | p->one->mode, | |
2515 | len1, p->one->path); | |
2516 | else | |
2517 | len1 = snprintf(buffer, sizeof(buffer), | |
2518 | "diff--gita/%.*sb/%.*s" | |
2519 | "---a/%.*s" | |
2520 | "+++b/%.*s", | |
2521 | len1, p->one->path, | |
2522 | len2, p->two->path, | |
2523 | len1, p->one->path, | |
2524 | len2, p->two->path); | |
2525 | SHA1_Update(&ctx, buffer, len1); | |
2526 | ||
2527 | xpp.flags = XDF_NEED_MINIMAL; | |
2528 | xecfg.ctxlen = 3; | |
9fdc3bb5 | 2529 | xecfg.flags = XDL_EMIT_FUNCNAMES; |
fcb3d0ad JS |
2530 | ecb.outf = xdiff_outf; |
2531 | ecb.priv = &data; | |
2532 | xdl_diff(&mf1, &mf2, &xpp, &xecfg, &ecb); | |
2533 | } | |
2534 | ||
2535 | SHA1_Final(sha1, &ctx); | |
2536 | return 0; | |
2537 | } | |
2538 | ||
2539 | int diff_flush_patch_id(struct diff_options *options, unsigned char *sha1) | |
2540 | { | |
2541 | struct diff_queue_struct *q = &diff_queued_diff; | |
2542 | int i; | |
2543 | int result = diff_get_patch_id(options, sha1); | |
2544 | ||
2545 | for (i = 0; i < q->nr; i++) | |
2546 | diff_free_filepair(q->queue[i]); | |
2547 | ||
2548 | free(q->queue); | |
2549 | q->queue = NULL; | |
2550 | q->nr = q->alloc = 0; | |
2551 | ||
2552 | return result; | |
2553 | } | |
2554 | ||
946c3784 | 2555 | static int is_summary_empty(const struct diff_queue_struct *q) |
6973dcae | 2556 | { |
6973dcae | 2557 | int i; |
6973dcae | 2558 | |
946c3784 TH |
2559 | for (i = 0; i < q->nr; i++) { |
2560 | const struct diff_filepair *p = q->queue[i]; | |
2561 | ||
2562 | switch (p->status) { | |
2563 | case DIFF_STATUS_DELETED: | |
2564 | case DIFF_STATUS_ADDED: | |
2565 | case DIFF_STATUS_COPIED: | |
2566 | case DIFF_STATUS_RENAMED: | |
2567 | return 0; | |
2568 | default: | |
2569 | if (p->score) | |
2570 | return 0; | |
2571 | if (p->one->mode && p->two->mode && | |
2572 | p->one->mode != p->two->mode) | |
2573 | return 0; | |
2574 | break; | |
2575 | } | |
6973dcae | 2576 | } |
946c3784 TH |
2577 | return 1; |
2578 | } | |
2579 | ||
6973dcae JH |
2580 | void diff_flush(struct diff_options *options) |
2581 | { | |
2582 | struct diff_queue_struct *q = &diff_queued_diff; | |
c6744349 | 2583 | int i, output_format = options->output_format; |
946c3784 | 2584 | int separator = 0; |
6973dcae | 2585 | |
c6744349 TH |
2586 | /* |
2587 | * Order: raw, stat, summary, patch | |
2588 | * or: name/name-status/checkdiff (other bits clear) | |
2589 | */ | |
946c3784 TH |
2590 | if (!q->nr) |
2591 | goto free_queue; | |
6973dcae | 2592 | |
c6744349 TH |
2593 | if (output_format & (DIFF_FORMAT_RAW | |
2594 | DIFF_FORMAT_NAME | | |
2595 | DIFF_FORMAT_NAME_STATUS | | |
2596 | DIFF_FORMAT_CHECKDIFF)) { | |
6973dcae JH |
2597 | for (i = 0; i < q->nr; i++) { |
2598 | struct diff_filepair *p = q->queue[i]; | |
c6744349 TH |
2599 | if (check_pair_status(p)) |
2600 | flush_one_pair(p, options); | |
6973dcae | 2601 | } |
946c3784 | 2602 | separator++; |
6973dcae | 2603 | } |
c6744349 TH |
2604 | |
2605 | if (output_format & DIFF_FORMAT_DIFFSTAT) { | |
5e2b0636 | 2606 | struct diffstat_t diffstat; |
c6744349 | 2607 | |
5e2b0636 TH |
2608 | memset(&diffstat, 0, sizeof(struct diffstat_t)); |
2609 | diffstat.xm.consume = diffstat_consume; | |
6973dcae JH |
2610 | for (i = 0; i < q->nr; i++) { |
2611 | struct diff_filepair *p = q->queue[i]; | |
c6744349 | 2612 | if (check_pair_status(p)) |
5e2b0636 | 2613 | diff_flush_stat(p, options, &diffstat); |
6973dcae | 2614 | } |
a2540023 | 2615 | show_stats(&diffstat, options); |
3969cf7d | 2616 | separator++; |
6973dcae JH |
2617 | } |
2618 | ||
946c3784 | 2619 | if (output_format & DIFF_FORMAT_SUMMARY && !is_summary_empty(q)) { |
c6744349 TH |
2620 | for (i = 0; i < q->nr; i++) |
2621 | diff_summary(q->queue[i]); | |
3969cf7d | 2622 | separator++; |
6973dcae JH |
2623 | } |
2624 | ||
c6744349 | 2625 | if (output_format & DIFF_FORMAT_PATCH) { |
946c3784 TH |
2626 | if (separator) { |
2627 | if (options->stat_sep) { | |
2628 | /* attach patch instead of inline */ | |
c6744349 | 2629 | fputs(options->stat_sep, stdout); |
946c3784 | 2630 | } else { |
c6744349 | 2631 | putchar(options->line_termination); |
946c3784 | 2632 | } |
c6744349 TH |
2633 | } |
2634 | ||
2635 | for (i = 0; i < q->nr; i++) { | |
2636 | struct diff_filepair *p = q->queue[i]; | |
2637 | if (check_pair_status(p)) | |
2638 | diff_flush_patch(p, options); | |
2639 | } | |
4bbd261b SE |
2640 | } |
2641 | ||
04245581 JK |
2642 | if (output_format & DIFF_FORMAT_CALLBACK) |
2643 | options->format_callback(q, options, options->format_callback_data); | |
2644 | ||
c6744349 TH |
2645 | for (i = 0; i < q->nr; i++) |
2646 | diff_free_filepair(q->queue[i]); | |
946c3784 | 2647 | free_queue: |
6973dcae JH |
2648 | free(q->queue); |
2649 | q->queue = NULL; | |
2650 | q->nr = q->alloc = 0; | |
2651 | } | |
2652 | ||
2653 | static void diffcore_apply_filter(const char *filter) | |
2654 | { | |
2655 | int i; | |
2656 | struct diff_queue_struct *q = &diff_queued_diff; | |
2657 | struct diff_queue_struct outq; | |
2658 | outq.queue = NULL; | |
2659 | outq.nr = outq.alloc = 0; | |
2660 | ||
2661 | if (!filter) | |
2662 | return; | |
2663 | ||
2664 | if (strchr(filter, DIFF_STATUS_FILTER_AON)) { | |
2665 | int found; | |
2666 | for (i = found = 0; !found && i < q->nr; i++) { | |
2667 | struct diff_filepair *p = q->queue[i]; | |
2668 | if (((p->status == DIFF_STATUS_MODIFIED) && | |
2669 | ((p->score && | |
2670 | strchr(filter, DIFF_STATUS_FILTER_BROKEN)) || | |
2671 | (!p->score && | |
2672 | strchr(filter, DIFF_STATUS_MODIFIED)))) || | |
2673 | ((p->status != DIFF_STATUS_MODIFIED) && | |
2674 | strchr(filter, p->status))) | |
2675 | found++; | |
2676 | } | |
2677 | if (found) | |
2678 | return; | |
2679 | ||
2680 | /* otherwise we will clear the whole queue | |
2681 | * by copying the empty outq at the end of this | |
2682 | * function, but first clear the current entries | |
2683 | * in the queue. | |
2684 | */ | |
2685 | for (i = 0; i < q->nr; i++) | |
2686 | diff_free_filepair(q->queue[i]); | |
2687 | } | |
2688 | else { | |
2689 | /* Only the matching ones */ | |
2690 | for (i = 0; i < q->nr; i++) { | |
2691 | struct diff_filepair *p = q->queue[i]; | |
2692 | ||
2693 | if (((p->status == DIFF_STATUS_MODIFIED) && | |
2694 | ((p->score && | |
2695 | strchr(filter, DIFF_STATUS_FILTER_BROKEN)) || | |
2696 | (!p->score && | |
2697 | strchr(filter, DIFF_STATUS_MODIFIED)))) || | |
2698 | ((p->status != DIFF_STATUS_MODIFIED) && | |
2699 | strchr(filter, p->status))) | |
2700 | diff_q(&outq, p); | |
2701 | else | |
2702 | diff_free_filepair(p); | |
2703 | } | |
2704 | } | |
2705 | free(q->queue); | |
2706 | *q = outq; | |
2707 | } | |
2708 | ||
2709 | void diffcore_std(struct diff_options *options) | |
2710 | { | |
2711 | if (options->break_opt != -1) | |
2712 | diffcore_break(options->break_opt); | |
2713 | if (options->detect_rename) | |
2714 | diffcore_rename(options); | |
2715 | if (options->break_opt != -1) | |
2716 | diffcore_merge_broken(); | |
2717 | if (options->pickaxe) | |
2718 | diffcore_pickaxe(options->pickaxe, options->pickaxe_opts); | |
2719 | if (options->orderfile) | |
2720 | diffcore_order(options->orderfile); | |
2721 | diff_resolve_rename_copy(); | |
2722 | diffcore_apply_filter(options->filter); | |
2723 | } | |
2724 | ||
2725 | ||
2726 | void diffcore_std_no_resolve(struct diff_options *options) | |
2727 | { | |
2728 | if (options->pickaxe) | |
2729 | diffcore_pickaxe(options->pickaxe, options->pickaxe_opts); | |
2730 | if (options->orderfile) | |
2731 | diffcore_order(options->orderfile); | |
2732 | diffcore_apply_filter(options->filter); | |
2733 | } | |
2734 | ||
2735 | void diff_addremove(struct diff_options *options, | |
2736 | int addremove, unsigned mode, | |
2737 | const unsigned char *sha1, | |
2738 | const char *base, const char *path) | |
2739 | { | |
2740 | char concatpath[PATH_MAX]; | |
2741 | struct diff_filespec *one, *two; | |
2742 | ||
2743 | /* This may look odd, but it is a preparation for | |
2744 | * feeding "there are unchanged files which should | |
2745 | * not produce diffs, but when you are doing copy | |
2746 | * detection you would need them, so here they are" | |
2747 | * entries to the diff-core. They will be prefixed | |
2748 | * with something like '=' or '*' (I haven't decided | |
2749 | * which but should not make any difference). | |
2750 | * Feeding the same new and old to diff_change() | |
2751 | * also has the same effect. | |
2752 | * Before the final output happens, they are pruned after | |
2753 | * merged into rename/copy pairs as appropriate. | |
2754 | */ | |
2755 | if (options->reverse_diff) | |
2756 | addremove = (addremove == '+' ? '-' : | |
2757 | addremove == '-' ? '+' : addremove); | |
2758 | ||
2759 | if (!path) path = ""; | |
2760 | sprintf(concatpath, "%s%s", base, path); | |
2761 | one = alloc_filespec(concatpath); | |
2762 | two = alloc_filespec(concatpath); | |
2763 | ||
2764 | if (addremove != '+') | |
2765 | fill_filespec(one, sha1, mode); | |
2766 | if (addremove != '-') | |
2767 | fill_filespec(two, sha1, mode); | |
2768 | ||
2769 | diff_queue(&diff_queued_diff, one, two); | |
2770 | } | |
2771 | ||
2772 | void diff_change(struct diff_options *options, | |
2773 | unsigned old_mode, unsigned new_mode, | |
2774 | const unsigned char *old_sha1, | |
2775 | const unsigned char *new_sha1, | |
2776 | const char *base, const char *path) | |
2777 | { | |
2778 | char concatpath[PATH_MAX]; | |
2779 | struct diff_filespec *one, *two; | |
2780 | ||
2781 | if (options->reverse_diff) { | |
2782 | unsigned tmp; | |
2783 | const unsigned char *tmp_c; | |
2784 | tmp = old_mode; old_mode = new_mode; new_mode = tmp; | |
2785 | tmp_c = old_sha1; old_sha1 = new_sha1; new_sha1 = tmp_c; | |
2786 | } | |
2787 | if (!path) path = ""; | |
2788 | sprintf(concatpath, "%s%s", base, path); | |
2789 | one = alloc_filespec(concatpath); | |
2790 | two = alloc_filespec(concatpath); | |
2791 | fill_filespec(one, old_sha1, old_mode); | |
2792 | fill_filespec(two, new_sha1, new_mode); | |
2793 | ||
2794 | diff_queue(&diff_queued_diff, one, two); | |
2795 | } | |
2796 | ||
2797 | void diff_unmerge(struct diff_options *options, | |
2798 | const char *path) | |
2799 | { | |
2800 | struct diff_filespec *one, *two; | |
2801 | one = alloc_filespec(path); | |
2802 | two = alloc_filespec(path); | |
2803 | diff_queue(&diff_queued_diff, one, two); | |
2804 | } |