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Commit | Line | Data |
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83b5d2f5 | 1 | #include "cache.h" |
83b5d2f5 | 2 | #include "grep.h" |
60ecac98 | 3 | #include "userdiff.h" |
6bfce93e | 4 | #include "xdiff-interface.h" |
335ec3bf JK |
5 | #include "diff.h" |
6 | #include "diffcore.h" | |
83b5d2f5 | 7 | |
07a7d656 JH |
8 | static int grep_source_load(struct grep_source *gs); |
9 | static int grep_source_is_binary(struct grep_source *gs); | |
10 | ||
7687a054 JH |
11 | static struct grep_opt grep_defaults; |
12 | ||
13 | /* | |
14 | * Initialize the grep_defaults template with hardcoded defaults. | |
15 | * We could let the compiler do this, but without C99 initializers | |
16 | * the code gets unwieldy and unreadable, so... | |
17 | */ | |
18 | void init_grep_defaults(void) | |
19 | { | |
20 | struct grep_opt *opt = &grep_defaults; | |
918d4e1c JH |
21 | static int run_once; |
22 | ||
23 | if (run_once) | |
24 | return; | |
25 | run_once++; | |
7687a054 JH |
26 | |
27 | memset(opt, 0, sizeof(*opt)); | |
28 | opt->relative = 1; | |
29 | opt->pathname = 1; | |
30 | opt->regflags = REG_NEWLINE; | |
31 | opt->max_depth = -1; | |
32 | opt->pattern_type_option = GREP_PATTERN_TYPE_UNSPECIFIED; | |
33 | opt->extended_regexp_option = 0; | |
34 | strcpy(opt->color_context, ""); | |
35 | strcpy(opt->color_filename, ""); | |
36 | strcpy(opt->color_function, ""); | |
37 | strcpy(opt->color_lineno, ""); | |
38 | strcpy(opt->color_match, GIT_COLOR_BOLD_RED); | |
39 | strcpy(opt->color_selected, ""); | |
40 | strcpy(opt->color_sep, GIT_COLOR_CYAN); | |
41 | opt->color = -1; | |
42 | } | |
43 | ||
44 | static int parse_pattern_type_arg(const char *opt, const char *arg) | |
45 | { | |
46 | if (!strcmp(arg, "default")) | |
47 | return GREP_PATTERN_TYPE_UNSPECIFIED; | |
48 | else if (!strcmp(arg, "basic")) | |
49 | return GREP_PATTERN_TYPE_BRE; | |
50 | else if (!strcmp(arg, "extended")) | |
51 | return GREP_PATTERN_TYPE_ERE; | |
52 | else if (!strcmp(arg, "fixed")) | |
53 | return GREP_PATTERN_TYPE_FIXED; | |
54 | else if (!strcmp(arg, "perl")) | |
55 | return GREP_PATTERN_TYPE_PCRE; | |
56 | die("bad %s argument: %s", opt, arg); | |
57 | } | |
58 | ||
59 | /* | |
60 | * Read the configuration file once and store it in | |
61 | * the grep_defaults template. | |
62 | */ | |
63 | int grep_config(const char *var, const char *value, void *cb) | |
64 | { | |
65 | struct grep_opt *opt = &grep_defaults; | |
66 | char *color = NULL; | |
67 | ||
68 | if (userdiff_config(var, value) < 0) | |
69 | return -1; | |
70 | ||
71 | if (!strcmp(var, "grep.extendedregexp")) { | |
72 | if (git_config_bool(var, value)) | |
73 | opt->extended_regexp_option = 1; | |
74 | else | |
75 | opt->extended_regexp_option = 0; | |
76 | return 0; | |
77 | } | |
78 | ||
79 | if (!strcmp(var, "grep.patterntype")) { | |
80 | opt->pattern_type_option = parse_pattern_type_arg(var, value); | |
81 | return 0; | |
82 | } | |
83 | ||
84 | if (!strcmp(var, "grep.linenumber")) { | |
85 | opt->linenum = git_config_bool(var, value); | |
86 | return 0; | |
87 | } | |
88 | ||
6453f7b3 AS |
89 | if (!strcmp(var, "grep.fullname")) { |
90 | opt->relative = !git_config_bool(var, value); | |
91 | return 0; | |
92 | } | |
93 | ||
7687a054 JH |
94 | if (!strcmp(var, "color.grep")) |
95 | opt->color = git_config_colorbool(var, value); | |
96 | else if (!strcmp(var, "color.grep.context")) | |
97 | color = opt->color_context; | |
98 | else if (!strcmp(var, "color.grep.filename")) | |
99 | color = opt->color_filename; | |
100 | else if (!strcmp(var, "color.grep.function")) | |
101 | color = opt->color_function; | |
102 | else if (!strcmp(var, "color.grep.linenumber")) | |
103 | color = opt->color_lineno; | |
104 | else if (!strcmp(var, "color.grep.match")) | |
105 | color = opt->color_match; | |
106 | else if (!strcmp(var, "color.grep.selected")) | |
107 | color = opt->color_selected; | |
108 | else if (!strcmp(var, "color.grep.separator")) | |
109 | color = opt->color_sep; | |
110 | ||
111 | if (color) { | |
112 | if (!value) | |
113 | return config_error_nonbool(var); | |
114 | color_parse(value, var, color); | |
115 | } | |
116 | return 0; | |
117 | } | |
118 | ||
119 | /* | |
120 | * Initialize one instance of grep_opt and copy the | |
121 | * default values from the template we read the configuration | |
122 | * information in an earlier call to git_config(grep_config). | |
123 | */ | |
124 | void grep_init(struct grep_opt *opt, const char *prefix) | |
125 | { | |
126 | struct grep_opt *def = &grep_defaults; | |
127 | ||
128 | memset(opt, 0, sizeof(*opt)); | |
129 | opt->prefix = prefix; | |
130 | opt->prefix_length = (prefix && *prefix) ? strlen(prefix) : 0; | |
131 | opt->pattern_tail = &opt->pattern_list; | |
132 | opt->header_tail = &opt->header_list; | |
133 | ||
134 | opt->color = def->color; | |
135 | opt->extended_regexp_option = def->extended_regexp_option; | |
136 | opt->pattern_type_option = def->pattern_type_option; | |
137 | opt->linenum = def->linenum; | |
138 | opt->max_depth = def->max_depth; | |
139 | opt->pathname = def->pathname; | |
140 | opt->regflags = def->regflags; | |
141 | opt->relative = def->relative; | |
142 | ||
143 | strcpy(opt->color_context, def->color_context); | |
144 | strcpy(opt->color_filename, def->color_filename); | |
145 | strcpy(opt->color_function, def->color_function); | |
146 | strcpy(opt->color_lineno, def->color_lineno); | |
147 | strcpy(opt->color_match, def->color_match); | |
148 | strcpy(opt->color_selected, def->color_selected); | |
149 | strcpy(opt->color_sep, def->color_sep); | |
150 | } | |
07a7d656 | 151 | |
c5c31d33 JH |
152 | void grep_commit_pattern_type(enum grep_pattern_type pattern_type, struct grep_opt *opt) |
153 | { | |
154 | if (pattern_type != GREP_PATTERN_TYPE_UNSPECIFIED) | |
155 | grep_set_pattern_type_option(pattern_type, opt); | |
156 | else if (opt->pattern_type_option != GREP_PATTERN_TYPE_UNSPECIFIED) | |
157 | grep_set_pattern_type_option(opt->pattern_type_option, opt); | |
158 | else if (opt->extended_regexp_option) | |
159 | grep_set_pattern_type_option(GREP_PATTERN_TYPE_ERE, opt); | |
160 | } | |
161 | ||
162 | void grep_set_pattern_type_option(enum grep_pattern_type pattern_type, struct grep_opt *opt) | |
163 | { | |
164 | switch (pattern_type) { | |
165 | case GREP_PATTERN_TYPE_UNSPECIFIED: | |
166 | /* fall through */ | |
167 | ||
168 | case GREP_PATTERN_TYPE_BRE: | |
169 | opt->fixed = 0; | |
170 | opt->pcre = 0; | |
171 | opt->regflags &= ~REG_EXTENDED; | |
172 | break; | |
173 | ||
174 | case GREP_PATTERN_TYPE_ERE: | |
175 | opt->fixed = 0; | |
176 | opt->pcre = 0; | |
177 | opt->regflags |= REG_EXTENDED; | |
178 | break; | |
179 | ||
180 | case GREP_PATTERN_TYPE_FIXED: | |
181 | opt->fixed = 1; | |
182 | opt->pcre = 0; | |
183 | opt->regflags &= ~REG_EXTENDED; | |
184 | break; | |
185 | ||
186 | case GREP_PATTERN_TYPE_PCRE: | |
187 | opt->fixed = 0; | |
188 | opt->pcre = 1; | |
189 | opt->regflags &= ~REG_EXTENDED; | |
190 | break; | |
191 | } | |
192 | } | |
193 | ||
fc456751 RS |
194 | static struct grep_pat *create_grep_pat(const char *pat, size_t patlen, |
195 | const char *origin, int no, | |
196 | enum grep_pat_token t, | |
197 | enum grep_header_field field) | |
a4d7d2c6 JH |
198 | { |
199 | struct grep_pat *p = xcalloc(1, sizeof(*p)); | |
526a858a | 200 | p->pattern = xmemdupz(pat, patlen); |
fc456751 RS |
201 | p->patternlen = patlen; |
202 | p->origin = origin; | |
203 | p->no = no; | |
204 | p->token = t; | |
a4d7d2c6 | 205 | p->field = field; |
fc456751 RS |
206 | return p; |
207 | } | |
208 | ||
2b3873ff RS |
209 | static void do_append_grep_pat(struct grep_pat ***tail, struct grep_pat *p) |
210 | { | |
211 | **tail = p; | |
212 | *tail = &p->next; | |
a4d7d2c6 | 213 | p->next = NULL; |
526a858a RS |
214 | |
215 | switch (p->token) { | |
216 | case GREP_PATTERN: /* atom */ | |
217 | case GREP_PATTERN_HEAD: | |
218 | case GREP_PATTERN_BODY: | |
219 | for (;;) { | |
220 | struct grep_pat *new_pat; | |
221 | size_t len = 0; | |
222 | char *cp = p->pattern + p->patternlen, *nl = NULL; | |
223 | while (++len <= p->patternlen) { | |
224 | if (*(--cp) == '\n') { | |
225 | nl = cp; | |
226 | break; | |
227 | } | |
228 | } | |
229 | if (!nl) | |
230 | break; | |
231 | new_pat = create_grep_pat(nl + 1, len - 1, p->origin, | |
232 | p->no, p->token, p->field); | |
233 | new_pat->next = p->next; | |
234 | if (!p->next) | |
235 | *tail = &new_pat->next; | |
236 | p->next = new_pat; | |
237 | *nl = '\0'; | |
238 | p->patternlen -= len; | |
239 | } | |
240 | break; | |
241 | default: | |
242 | break; | |
243 | } | |
2b3873ff RS |
244 | } |
245 | ||
fc456751 RS |
246 | void append_header_grep_pattern(struct grep_opt *opt, |
247 | enum grep_header_field field, const char *pat) | |
248 | { | |
249 | struct grep_pat *p = create_grep_pat(pat, strlen(pat), "header", 0, | |
250 | GREP_PATTERN_HEAD, field); | |
baa6378f JH |
251 | if (field == GREP_HEADER_REFLOG) |
252 | opt->use_reflog_filter = 1; | |
2b3873ff | 253 | do_append_grep_pat(&opt->header_tail, p); |
a4d7d2c6 JH |
254 | } |
255 | ||
83b5d2f5 JH |
256 | void append_grep_pattern(struct grep_opt *opt, const char *pat, |
257 | const char *origin, int no, enum grep_pat_token t) | |
ed40a095 RS |
258 | { |
259 | append_grep_pat(opt, pat, strlen(pat), origin, no, t); | |
260 | } | |
261 | ||
262 | void append_grep_pat(struct grep_opt *opt, const char *pat, size_t patlen, | |
263 | const char *origin, int no, enum grep_pat_token t) | |
83b5d2f5 | 264 | { |
fc456751 | 265 | struct grep_pat *p = create_grep_pat(pat, patlen, origin, no, t, 0); |
2b3873ff | 266 | do_append_grep_pat(&opt->pattern_tail, p); |
83b5d2f5 JH |
267 | } |
268 | ||
5b594f45 FK |
269 | struct grep_opt *grep_opt_dup(const struct grep_opt *opt) |
270 | { | |
271 | struct grep_pat *pat; | |
272 | struct grep_opt *ret = xmalloc(sizeof(struct grep_opt)); | |
273 | *ret = *opt; | |
274 | ||
275 | ret->pattern_list = NULL; | |
276 | ret->pattern_tail = &ret->pattern_list; | |
277 | ||
278 | for(pat = opt->pattern_list; pat != NULL; pat = pat->next) | |
279 | { | |
280 | if(pat->token == GREP_PATTERN_HEAD) | |
281 | append_header_grep_pattern(ret, pat->field, | |
282 | pat->pattern); | |
283 | else | |
ed40a095 RS |
284 | append_grep_pat(ret, pat->pattern, pat->patternlen, |
285 | pat->origin, pat->no, pat->token); | |
5b594f45 FK |
286 | } |
287 | ||
288 | return ret; | |
289 | } | |
290 | ||
a30c148a MK |
291 | static NORETURN void compile_regexp_failed(const struct grep_pat *p, |
292 | const char *error) | |
293 | { | |
294 | char where[1024]; | |
295 | ||
296 | if (p->no) | |
297 | sprintf(where, "In '%s' at %d, ", p->origin, p->no); | |
298 | else if (p->origin) | |
299 | sprintf(where, "%s, ", p->origin); | |
300 | else | |
301 | where[0] = 0; | |
302 | ||
303 | die("%s'%s': %s", where, p->pattern, error); | |
304 | } | |
305 | ||
63e7e9d8 MK |
306 | #ifdef USE_LIBPCRE |
307 | static void compile_pcre_regexp(struct grep_pat *p, const struct grep_opt *opt) | |
308 | { | |
309 | const char *error; | |
310 | int erroffset; | |
fba4f125 | 311 | int options = PCRE_MULTILINE; |
63e7e9d8 MK |
312 | |
313 | if (opt->ignore_case) | |
314 | options |= PCRE_CASELESS; | |
315 | ||
316 | p->pcre_regexp = pcre_compile(p->pattern, options, &error, &erroffset, | |
317 | NULL); | |
318 | if (!p->pcre_regexp) | |
319 | compile_regexp_failed(p, error); | |
320 | ||
321 | p->pcre_extra_info = pcre_study(p->pcre_regexp, 0, &error); | |
322 | if (!p->pcre_extra_info && error) | |
323 | die("%s", error); | |
324 | } | |
325 | ||
326 | static int pcrematch(struct grep_pat *p, const char *line, const char *eol, | |
327 | regmatch_t *match, int eflags) | |
328 | { | |
329 | int ovector[30], ret, flags = 0; | |
330 | ||
331 | if (eflags & REG_NOTBOL) | |
332 | flags |= PCRE_NOTBOL; | |
333 | ||
334 | ret = pcre_exec(p->pcre_regexp, p->pcre_extra_info, line, eol - line, | |
335 | 0, flags, ovector, ARRAY_SIZE(ovector)); | |
336 | if (ret < 0 && ret != PCRE_ERROR_NOMATCH) | |
337 | die("pcre_exec failed with error code %d", ret); | |
338 | if (ret > 0) { | |
339 | ret = 0; | |
340 | match->rm_so = ovector[0]; | |
341 | match->rm_eo = ovector[1]; | |
342 | } | |
343 | ||
344 | return ret; | |
345 | } | |
346 | ||
347 | static void free_pcre_regexp(struct grep_pat *p) | |
348 | { | |
349 | pcre_free(p->pcre_regexp); | |
350 | pcre_free(p->pcre_extra_info); | |
351 | } | |
352 | #else /* !USE_LIBPCRE */ | |
353 | static void compile_pcre_regexp(struct grep_pat *p, const struct grep_opt *opt) | |
354 | { | |
355 | die("cannot use Perl-compatible regexes when not compiled with USE_LIBPCRE"); | |
356 | } | |
357 | ||
358 | static int pcrematch(struct grep_pat *p, const char *line, const char *eol, | |
359 | regmatch_t *match, int eflags) | |
360 | { | |
361 | return 1; | |
362 | } | |
363 | ||
364 | static void free_pcre_regexp(struct grep_pat *p) | |
365 | { | |
366 | } | |
367 | #endif /* !USE_LIBPCRE */ | |
368 | ||
9eceddee FK |
369 | static int is_fixed(const char *s, size_t len) |
370 | { | |
371 | size_t i; | |
372 | ||
373 | /* regcomp cannot accept patterns with NULs so we | |
374 | * consider any pattern containing a NUL fixed. | |
375 | */ | |
376 | if (memchr(s, 0, len)) | |
377 | return 1; | |
378 | ||
379 | for (i = 0; i < len; i++) { | |
380 | if (is_regex_special(s[i])) | |
381 | return 0; | |
382 | } | |
383 | ||
384 | return 1; | |
385 | } | |
386 | ||
83b5d2f5 JH |
387 | static void compile_regexp(struct grep_pat *p, struct grep_opt *opt) |
388 | { | |
c822255c RS |
389 | int err; |
390 | ||
d7eb527d | 391 | p->word_regexp = opt->word_regexp; |
5183bf67 | 392 | p->ignore_case = opt->ignore_case; |
d7eb527d | 393 | |
9eceddee FK |
394 | if (opt->fixed || is_fixed(p->pattern, p->patternlen)) |
395 | p->fixed = 1; | |
396 | else | |
397 | p->fixed = 0; | |
398 | ||
399 | if (p->fixed) { | |
0f871cf5 JH |
400 | if (opt->regflags & REG_ICASE || p->ignore_case) |
401 | p->kws = kwsalloc(tolower_trans_tbl); | |
402 | else | |
9eceddee | 403 | p->kws = kwsalloc(NULL); |
9eceddee FK |
404 | kwsincr(p->kws, p->pattern, p->patternlen); |
405 | kwsprep(p->kws); | |
c822255c | 406 | return; |
9eceddee | 407 | } |
c822255c | 408 | |
63e7e9d8 MK |
409 | if (opt->pcre) { |
410 | compile_pcre_regexp(p, opt); | |
411 | return; | |
412 | } | |
413 | ||
c822255c | 414 | err = regcomp(&p->regexp, p->pattern, opt->regflags); |
83b5d2f5 JH |
415 | if (err) { |
416 | char errbuf[1024]; | |
83b5d2f5 JH |
417 | regerror(err, &p->regexp, errbuf, 1024); |
418 | regfree(&p->regexp); | |
a30c148a | 419 | compile_regexp_failed(p, errbuf); |
83b5d2f5 JH |
420 | } |
421 | } | |
422 | ||
0ab7befa | 423 | static struct grep_expr *compile_pattern_or(struct grep_pat **); |
83b5d2f5 JH |
424 | static struct grep_expr *compile_pattern_atom(struct grep_pat **list) |
425 | { | |
426 | struct grep_pat *p; | |
427 | struct grep_expr *x; | |
428 | ||
429 | p = *list; | |
c922b01f LT |
430 | if (!p) |
431 | return NULL; | |
83b5d2f5 JH |
432 | switch (p->token) { |
433 | case GREP_PATTERN: /* atom */ | |
480c1ca6 JH |
434 | case GREP_PATTERN_HEAD: |
435 | case GREP_PATTERN_BODY: | |
83b5d2f5 JH |
436 | x = xcalloc(1, sizeof (struct grep_expr)); |
437 | x->node = GREP_NODE_ATOM; | |
438 | x->u.atom = p; | |
439 | *list = p->next; | |
440 | return x; | |
441 | case GREP_OPEN_PAREN: | |
442 | *list = p->next; | |
0ab7befa | 443 | x = compile_pattern_or(list); |
83b5d2f5 JH |
444 | if (!*list || (*list)->token != GREP_CLOSE_PAREN) |
445 | die("unmatched parenthesis"); | |
446 | *list = (*list)->next; | |
447 | return x; | |
448 | default: | |
449 | return NULL; | |
450 | } | |
451 | } | |
452 | ||
453 | static struct grep_expr *compile_pattern_not(struct grep_pat **list) | |
454 | { | |
455 | struct grep_pat *p; | |
456 | struct grep_expr *x; | |
457 | ||
458 | p = *list; | |
c922b01f LT |
459 | if (!p) |
460 | return NULL; | |
83b5d2f5 JH |
461 | switch (p->token) { |
462 | case GREP_NOT: | |
463 | if (!p->next) | |
464 | die("--not not followed by pattern expression"); | |
465 | *list = p->next; | |
466 | x = xcalloc(1, sizeof (struct grep_expr)); | |
467 | x->node = GREP_NODE_NOT; | |
468 | x->u.unary = compile_pattern_not(list); | |
469 | if (!x->u.unary) | |
470 | die("--not followed by non pattern expression"); | |
471 | return x; | |
472 | default: | |
473 | return compile_pattern_atom(list); | |
474 | } | |
475 | } | |
476 | ||
477 | static struct grep_expr *compile_pattern_and(struct grep_pat **list) | |
478 | { | |
479 | struct grep_pat *p; | |
480 | struct grep_expr *x, *y, *z; | |
481 | ||
482 | x = compile_pattern_not(list); | |
483 | p = *list; | |
484 | if (p && p->token == GREP_AND) { | |
485 | if (!p->next) | |
486 | die("--and not followed by pattern expression"); | |
487 | *list = p->next; | |
488 | y = compile_pattern_and(list); | |
489 | if (!y) | |
490 | die("--and not followed by pattern expression"); | |
491 | z = xcalloc(1, sizeof (struct grep_expr)); | |
492 | z->node = GREP_NODE_AND; | |
493 | z->u.binary.left = x; | |
494 | z->u.binary.right = y; | |
495 | return z; | |
496 | } | |
497 | return x; | |
498 | } | |
499 | ||
500 | static struct grep_expr *compile_pattern_or(struct grep_pat **list) | |
501 | { | |
502 | struct grep_pat *p; | |
503 | struct grep_expr *x, *y, *z; | |
504 | ||
505 | x = compile_pattern_and(list); | |
506 | p = *list; | |
507 | if (x && p && p->token != GREP_CLOSE_PAREN) { | |
508 | y = compile_pattern_or(list); | |
509 | if (!y) | |
510 | die("not a pattern expression %s", p->pattern); | |
511 | z = xcalloc(1, sizeof (struct grep_expr)); | |
512 | z->node = GREP_NODE_OR; | |
513 | z->u.binary.left = x; | |
514 | z->u.binary.right = y; | |
515 | return z; | |
516 | } | |
517 | return x; | |
518 | } | |
519 | ||
520 | static struct grep_expr *compile_pattern_expr(struct grep_pat **list) | |
521 | { | |
522 | return compile_pattern_or(list); | |
523 | } | |
524 | ||
17bf35a3 JH |
525 | static void indent(int in) |
526 | { | |
527 | while (in-- > 0) | |
528 | fputc(' ', stderr); | |
529 | } | |
530 | ||
531 | static void dump_grep_pat(struct grep_pat *p) | |
532 | { | |
533 | switch (p->token) { | |
534 | case GREP_AND: fprintf(stderr, "*and*"); break; | |
535 | case GREP_OPEN_PAREN: fprintf(stderr, "*(*"); break; | |
536 | case GREP_CLOSE_PAREN: fprintf(stderr, "*)*"); break; | |
537 | case GREP_NOT: fprintf(stderr, "*not*"); break; | |
538 | case GREP_OR: fprintf(stderr, "*or*"); break; | |
539 | ||
540 | case GREP_PATTERN: fprintf(stderr, "pattern"); break; | |
541 | case GREP_PATTERN_HEAD: fprintf(stderr, "pattern_head"); break; | |
542 | case GREP_PATTERN_BODY: fprintf(stderr, "pattern_body"); break; | |
543 | } | |
544 | ||
545 | switch (p->token) { | |
546 | default: break; | |
547 | case GREP_PATTERN_HEAD: | |
548 | fprintf(stderr, "<head %d>", p->field); break; | |
549 | case GREP_PATTERN_BODY: | |
550 | fprintf(stderr, "<body>"); break; | |
551 | } | |
552 | switch (p->token) { | |
553 | default: break; | |
554 | case GREP_PATTERN_HEAD: | |
555 | case GREP_PATTERN_BODY: | |
556 | case GREP_PATTERN: | |
557 | fprintf(stderr, "%.*s", (int)p->patternlen, p->pattern); | |
558 | break; | |
559 | } | |
560 | fputc('\n', stderr); | |
561 | } | |
562 | ||
563 | static void dump_grep_expression_1(struct grep_expr *x, int in) | |
564 | { | |
565 | indent(in); | |
566 | switch (x->node) { | |
567 | case GREP_NODE_TRUE: | |
568 | fprintf(stderr, "true\n"); | |
569 | break; | |
570 | case GREP_NODE_ATOM: | |
571 | dump_grep_pat(x->u.atom); | |
572 | break; | |
573 | case GREP_NODE_NOT: | |
574 | fprintf(stderr, "(not\n"); | |
575 | dump_grep_expression_1(x->u.unary, in+1); | |
576 | indent(in); | |
577 | fprintf(stderr, ")\n"); | |
578 | break; | |
579 | case GREP_NODE_AND: | |
580 | fprintf(stderr, "(and\n"); | |
581 | dump_grep_expression_1(x->u.binary.left, in+1); | |
582 | dump_grep_expression_1(x->u.binary.right, in+1); | |
583 | indent(in); | |
584 | fprintf(stderr, ")\n"); | |
585 | break; | |
586 | case GREP_NODE_OR: | |
587 | fprintf(stderr, "(or\n"); | |
588 | dump_grep_expression_1(x->u.binary.left, in+1); | |
589 | dump_grep_expression_1(x->u.binary.right, in+1); | |
590 | indent(in); | |
591 | fprintf(stderr, ")\n"); | |
592 | break; | |
593 | } | |
594 | } | |
595 | ||
07a7d656 | 596 | static void dump_grep_expression(struct grep_opt *opt) |
17bf35a3 JH |
597 | { |
598 | struct grep_expr *x = opt->pattern_expression; | |
599 | ||
600 | if (opt->all_match) | |
601 | fprintf(stderr, "[all-match]\n"); | |
602 | dump_grep_expression_1(x, 0); | |
603 | fflush(NULL); | |
604 | } | |
605 | ||
5aaeb733 JH |
606 | static struct grep_expr *grep_true_expr(void) |
607 | { | |
608 | struct grep_expr *z = xcalloc(1, sizeof(*z)); | |
609 | z->node = GREP_NODE_TRUE; | |
610 | return z; | |
611 | } | |
612 | ||
613 | static struct grep_expr *grep_or_expr(struct grep_expr *left, struct grep_expr *right) | |
614 | { | |
615 | struct grep_expr *z = xcalloc(1, sizeof(*z)); | |
616 | z->node = GREP_NODE_OR; | |
617 | z->u.binary.left = left; | |
618 | z->u.binary.right = right; | |
619 | return z; | |
620 | } | |
621 | ||
95ce9ce2 | 622 | static struct grep_expr *prep_header_patterns(struct grep_opt *opt) |
83b5d2f5 JH |
623 | { |
624 | struct grep_pat *p; | |
95ce9ce2 | 625 | struct grep_expr *header_expr; |
5aaeb733 JH |
626 | struct grep_expr *(header_group[GREP_HEADER_FIELD_MAX]); |
627 | enum grep_header_field fld; | |
83b5d2f5 | 628 | |
95ce9ce2 JH |
629 | if (!opt->header_list) |
630 | return NULL; | |
2385f246 | 631 | |
95ce9ce2 JH |
632 | for (p = opt->header_list; p; p = p->next) { |
633 | if (p->token != GREP_PATTERN_HEAD) | |
634 | die("bug: a non-header pattern in grep header list."); | |
3ce3ffb8 AP |
635 | if (p->field < GREP_HEADER_FIELD_MIN || |
636 | GREP_HEADER_FIELD_MAX <= p->field) | |
95ce9ce2 JH |
637 | die("bug: unknown header field %d", p->field); |
638 | compile_regexp(p, opt); | |
80235ba7 | 639 | } |
5aaeb733 JH |
640 | |
641 | for (fld = 0; fld < GREP_HEADER_FIELD_MAX; fld++) | |
642 | header_group[fld] = NULL; | |
643 | ||
644 | for (p = opt->header_list; p; p = p->next) { | |
645 | struct grep_expr *h; | |
646 | struct grep_pat *pp = p; | |
647 | ||
648 | h = compile_pattern_atom(&pp); | |
649 | if (!h || pp != p->next) | |
650 | die("bug: malformed header expr"); | |
651 | if (!header_group[p->field]) { | |
652 | header_group[p->field] = h; | |
653 | continue; | |
654 | } | |
655 | header_group[p->field] = grep_or_expr(h, header_group[p->field]); | |
656 | } | |
657 | ||
658 | header_expr = NULL; | |
659 | ||
660 | for (fld = 0; fld < GREP_HEADER_FIELD_MAX; fld++) { | |
661 | if (!header_group[fld]) | |
662 | continue; | |
663 | if (!header_expr) | |
664 | header_expr = grep_true_expr(); | |
665 | header_expr = grep_or_expr(header_group[fld], header_expr); | |
666 | } | |
95ce9ce2 JH |
667 | return header_expr; |
668 | } | |
669 | ||
13e4fc7e JH |
670 | static struct grep_expr *grep_splice_or(struct grep_expr *x, struct grep_expr *y) |
671 | { | |
672 | struct grep_expr *z = x; | |
673 | ||
674 | while (x) { | |
675 | assert(x->node == GREP_NODE_OR); | |
676 | if (x->u.binary.right && | |
677 | x->u.binary.right->node == GREP_NODE_TRUE) { | |
678 | x->u.binary.right = y; | |
679 | break; | |
680 | } | |
681 | x = x->u.binary.right; | |
682 | } | |
683 | return z; | |
684 | } | |
685 | ||
17bf35a3 | 686 | static void compile_grep_patterns_real(struct grep_opt *opt) |
95ce9ce2 JH |
687 | { |
688 | struct grep_pat *p; | |
689 | struct grep_expr *header_expr = prep_header_patterns(opt); | |
0ab7befa | 690 | |
83b5d2f5 | 691 | for (p = opt->pattern_list; p; p = p->next) { |
480c1ca6 JH |
692 | switch (p->token) { |
693 | case GREP_PATTERN: /* atom */ | |
694 | case GREP_PATTERN_HEAD: | |
695 | case GREP_PATTERN_BODY: | |
c822255c | 696 | compile_regexp(p, opt); |
480c1ca6 JH |
697 | break; |
698 | default: | |
83b5d2f5 | 699 | opt->extended = 1; |
480c1ca6 JH |
700 | break; |
701 | } | |
83b5d2f5 JH |
702 | } |
703 | ||
80235ba7 JH |
704 | if (opt->all_match || header_expr) |
705 | opt->extended = 1; | |
17bf35a3 | 706 | else if (!opt->extended && !opt->debug) |
83b5d2f5 JH |
707 | return; |
708 | ||
83b5d2f5 | 709 | p = opt->pattern_list; |
ba150a3f MB |
710 | if (p) |
711 | opt->pattern_expression = compile_pattern_expr(&p); | |
83b5d2f5 JH |
712 | if (p) |
713 | die("incomplete pattern expression: %s", p->pattern); | |
80235ba7 JH |
714 | |
715 | if (!header_expr) | |
716 | return; | |
717 | ||
5aaeb733 | 718 | if (!opt->pattern_expression) |
80235ba7 | 719 | opt->pattern_expression = header_expr; |
13e4fc7e JH |
720 | else if (opt->all_match) |
721 | opt->pattern_expression = grep_splice_or(header_expr, | |
722 | opt->pattern_expression); | |
5aaeb733 JH |
723 | else |
724 | opt->pattern_expression = grep_or_expr(opt->pattern_expression, | |
725 | header_expr); | |
80235ba7 | 726 | opt->all_match = 1; |
83b5d2f5 JH |
727 | } |
728 | ||
17bf35a3 JH |
729 | void compile_grep_patterns(struct grep_opt *opt) |
730 | { | |
731 | compile_grep_patterns_real(opt); | |
732 | if (opt->debug) | |
733 | dump_grep_expression(opt); | |
734 | } | |
735 | ||
b48fb5b6 JH |
736 | static void free_pattern_expr(struct grep_expr *x) |
737 | { | |
738 | switch (x->node) { | |
5aaeb733 | 739 | case GREP_NODE_TRUE: |
b48fb5b6 JH |
740 | case GREP_NODE_ATOM: |
741 | break; | |
742 | case GREP_NODE_NOT: | |
743 | free_pattern_expr(x->u.unary); | |
744 | break; | |
745 | case GREP_NODE_AND: | |
746 | case GREP_NODE_OR: | |
747 | free_pattern_expr(x->u.binary.left); | |
748 | free_pattern_expr(x->u.binary.right); | |
749 | break; | |
750 | } | |
751 | free(x); | |
752 | } | |
753 | ||
754 | void free_grep_patterns(struct grep_opt *opt) | |
755 | { | |
756 | struct grep_pat *p, *n; | |
757 | ||
758 | for (p = opt->pattern_list; p; p = n) { | |
759 | n = p->next; | |
760 | switch (p->token) { | |
761 | case GREP_PATTERN: /* atom */ | |
762 | case GREP_PATTERN_HEAD: | |
763 | case GREP_PATTERN_BODY: | |
9eceddee FK |
764 | if (p->kws) |
765 | kwsfree(p->kws); | |
766 | else if (p->pcre_regexp) | |
63e7e9d8 MK |
767 | free_pcre_regexp(p); |
768 | else | |
769 | regfree(&p->regexp); | |
526a858a | 770 | free(p->pattern); |
b48fb5b6 JH |
771 | break; |
772 | default: | |
773 | break; | |
774 | } | |
775 | free(p); | |
776 | } | |
777 | ||
778 | if (!opt->extended) | |
779 | return; | |
780 | free_pattern_expr(opt->pattern_expression); | |
781 | } | |
782 | ||
83b5d2f5 JH |
783 | static char *end_of_line(char *cp, unsigned long *left) |
784 | { | |
785 | unsigned long l = *left; | |
786 | while (l && *cp != '\n') { | |
787 | l--; | |
788 | cp++; | |
789 | } | |
790 | *left = l; | |
791 | return cp; | |
792 | } | |
793 | ||
794 | static int word_char(char ch) | |
795 | { | |
796 | return isalnum(ch) || ch == '_'; | |
797 | } | |
798 | ||
55f638bd ML |
799 | static void output_color(struct grep_opt *opt, const void *data, size_t size, |
800 | const char *color) | |
801 | { | |
daa0c3d9 | 802 | if (want_color(opt->color) && color && color[0]) { |
55f638bd ML |
803 | opt->output(opt, color, strlen(color)); |
804 | opt->output(opt, data, size); | |
805 | opt->output(opt, GIT_COLOR_RESET, strlen(GIT_COLOR_RESET)); | |
806 | } else | |
807 | opt->output(opt, data, size); | |
808 | } | |
809 | ||
810 | static void output_sep(struct grep_opt *opt, char sign) | |
811 | { | |
812 | if (opt->null_following_name) | |
813 | opt->output(opt, "\0", 1); | |
814 | else | |
815 | output_color(opt, &sign, 1, opt->color_sep); | |
816 | } | |
817 | ||
83caecca RZ |
818 | static void show_name(struct grep_opt *opt, const char *name) |
819 | { | |
55f638bd | 820 | output_color(opt, name, strlen(name), opt->color_filename); |
5b594f45 | 821 | opt->output(opt, opt->null_following_name ? "\0" : "\n", 1); |
83caecca RZ |
822 | } |
823 | ||
ed40a095 RS |
824 | static int fixmatch(struct grep_pat *p, char *line, char *eol, |
825 | regmatch_t *match) | |
83b5d2f5 | 826 | { |
9eceddee FK |
827 | struct kwsmatch kwsm; |
828 | size_t offset = kwsexec(p->kws, line, eol - line, &kwsm); | |
829 | if (offset == -1) { | |
83b5d2f5 JH |
830 | match->rm_so = match->rm_eo = -1; |
831 | return REG_NOMATCH; | |
9eceddee FK |
832 | } else { |
833 | match->rm_so = offset; | |
834 | match->rm_eo = match->rm_so + kwsm.size[0]; | |
83b5d2f5 JH |
835 | return 0; |
836 | } | |
837 | } | |
838 | ||
f96e5673 RS |
839 | static int regmatch(const regex_t *preg, char *line, char *eol, |
840 | regmatch_t *match, int eflags) | |
841 | { | |
842 | #ifdef REG_STARTEND | |
843 | match->rm_so = 0; | |
844 | match->rm_eo = eol - line; | |
845 | eflags |= REG_STARTEND; | |
846 | #endif | |
847 | return regexec(preg, line, 1, match, eflags); | |
848 | } | |
849 | ||
97e77784 MK |
850 | static int patmatch(struct grep_pat *p, char *line, char *eol, |
851 | regmatch_t *match, int eflags) | |
852 | { | |
853 | int hit; | |
854 | ||
855 | if (p->fixed) | |
856 | hit = !fixmatch(p, line, eol, match); | |
63e7e9d8 MK |
857 | else if (p->pcre_regexp) |
858 | hit = !pcrematch(p, line, eol, match, eflags); | |
97e77784 MK |
859 | else |
860 | hit = !regmatch(&p->regexp, line, eol, match, eflags); | |
861 | ||
862 | return hit; | |
863 | } | |
864 | ||
a4d7d2c6 JH |
865 | static int strip_timestamp(char *bol, char **eol_p) |
866 | { | |
867 | char *eol = *eol_p; | |
868 | int ch; | |
869 | ||
870 | while (bol < --eol) { | |
871 | if (*eol != '>') | |
872 | continue; | |
873 | *eol_p = ++eol; | |
874 | ch = *eol; | |
875 | *eol = '\0'; | |
876 | return ch; | |
877 | } | |
878 | return 0; | |
879 | } | |
880 | ||
881 | static struct { | |
882 | const char *field; | |
883 | size_t len; | |
884 | } header_field[] = { | |
885 | { "author ", 7 }, | |
886 | { "committer ", 10 }, | |
72fd13f7 | 887 | { "reflog ", 7 }, |
a4d7d2c6 JH |
888 | }; |
889 | ||
d7eb527d | 890 | static int match_one_pattern(struct grep_pat *p, char *bol, char *eol, |
79212772 RS |
891 | enum grep_context ctx, |
892 | regmatch_t *pmatch, int eflags) | |
83b5d2f5 JH |
893 | { |
894 | int hit = 0; | |
a4d7d2c6 | 895 | int saved_ch = 0; |
e701fadb | 896 | const char *start = bol; |
83b5d2f5 | 897 | |
480c1ca6 JH |
898 | if ((p->token != GREP_PATTERN) && |
899 | ((p->token == GREP_PATTERN_HEAD) != (ctx == GREP_CONTEXT_HEAD))) | |
900 | return 0; | |
901 | ||
a4d7d2c6 JH |
902 | if (p->token == GREP_PATTERN_HEAD) { |
903 | const char *field; | |
904 | size_t len; | |
905 | assert(p->field < ARRAY_SIZE(header_field)); | |
906 | field = header_field[p->field].field; | |
907 | len = header_field[p->field].len; | |
908 | if (strncmp(bol, field, len)) | |
909 | return 0; | |
910 | bol += len; | |
ad4813b3 NTND |
911 | switch (p->field) { |
912 | case GREP_HEADER_AUTHOR: | |
913 | case GREP_HEADER_COMMITTER: | |
914 | saved_ch = strip_timestamp(bol, &eol); | |
915 | break; | |
916 | default: | |
917 | break; | |
918 | } | |
a4d7d2c6 JH |
919 | } |
920 | ||
83b5d2f5 | 921 | again: |
97e77784 | 922 | hit = patmatch(p, bol, eol, pmatch, eflags); |
83b5d2f5 | 923 | |
d7eb527d | 924 | if (hit && p->word_regexp) { |
83b5d2f5 | 925 | if ((pmatch[0].rm_so < 0) || |
84201eae | 926 | (eol - bol) < pmatch[0].rm_so || |
83b5d2f5 JH |
927 | (pmatch[0].rm_eo < 0) || |
928 | (eol - bol) < pmatch[0].rm_eo) | |
929 | die("regexp returned nonsense"); | |
930 | ||
931 | /* Match beginning must be either beginning of the | |
932 | * line, or at word boundary (i.e. the last char must | |
933 | * not be a word char). Similarly, match end must be | |
934 | * either end of the line, or at word boundary | |
935 | * (i.e. the next char must not be a word char). | |
936 | */ | |
fb62eb7f | 937 | if ( ((pmatch[0].rm_so == 0) || |
83b5d2f5 JH |
938 | !word_char(bol[pmatch[0].rm_so-1])) && |
939 | ((pmatch[0].rm_eo == (eol-bol)) || | |
940 | !word_char(bol[pmatch[0].rm_eo])) ) | |
941 | ; | |
942 | else | |
943 | hit = 0; | |
944 | ||
84201eae RS |
945 | /* Words consist of at least one character. */ |
946 | if (pmatch->rm_so == pmatch->rm_eo) | |
947 | hit = 0; | |
948 | ||
83b5d2f5 JH |
949 | if (!hit && pmatch[0].rm_so + bol + 1 < eol) { |
950 | /* There could be more than one match on the | |
951 | * line, and the first match might not be | |
952 | * strict word match. But later ones could be! | |
fb62eb7f RS |
953 | * Forward to the next possible start, i.e. the |
954 | * next position following a non-word char. | |
83b5d2f5 JH |
955 | */ |
956 | bol = pmatch[0].rm_so + bol + 1; | |
fb62eb7f RS |
957 | while (word_char(bol[-1]) && bol < eol) |
958 | bol++; | |
dbb6a4ad | 959 | eflags |= REG_NOTBOL; |
fb62eb7f RS |
960 | if (bol < eol) |
961 | goto again; | |
83b5d2f5 JH |
962 | } |
963 | } | |
a4d7d2c6 JH |
964 | if (p->token == GREP_PATTERN_HEAD && saved_ch) |
965 | *eol = saved_ch; | |
e701fadb RS |
966 | if (hit) { |
967 | pmatch[0].rm_so += bol - start; | |
968 | pmatch[0].rm_eo += bol - start; | |
969 | } | |
83b5d2f5 JH |
970 | return hit; |
971 | } | |
972 | ||
d7eb527d RS |
973 | static int match_expr_eval(struct grep_expr *x, char *bol, char *eol, |
974 | enum grep_context ctx, int collect_hits) | |
83b5d2f5 | 975 | { |
0ab7befa | 976 | int h = 0; |
79212772 | 977 | regmatch_t match; |
0ab7befa | 978 | |
c922b01f LT |
979 | if (!x) |
980 | die("Not a valid grep expression"); | |
83b5d2f5 | 981 | switch (x->node) { |
5aaeb733 JH |
982 | case GREP_NODE_TRUE: |
983 | h = 1; | |
984 | break; | |
83b5d2f5 | 985 | case GREP_NODE_ATOM: |
79212772 | 986 | h = match_one_pattern(x->u.atom, bol, eol, ctx, &match, 0); |
83b5d2f5 JH |
987 | break; |
988 | case GREP_NODE_NOT: | |
d7eb527d | 989 | h = !match_expr_eval(x->u.unary, bol, eol, ctx, 0); |
0ab7befa | 990 | break; |
83b5d2f5 | 991 | case GREP_NODE_AND: |
d7eb527d | 992 | if (!match_expr_eval(x->u.binary.left, bol, eol, ctx, 0)) |
252d560d | 993 | return 0; |
d7eb527d | 994 | h = match_expr_eval(x->u.binary.right, bol, eol, ctx, 0); |
0ab7befa | 995 | break; |
83b5d2f5 | 996 | case GREP_NODE_OR: |
0ab7befa | 997 | if (!collect_hits) |
d7eb527d | 998 | return (match_expr_eval(x->u.binary.left, |
0ab7befa | 999 | bol, eol, ctx, 0) || |
d7eb527d | 1000 | match_expr_eval(x->u.binary.right, |
0ab7befa | 1001 | bol, eol, ctx, 0)); |
d7eb527d | 1002 | h = match_expr_eval(x->u.binary.left, bol, eol, ctx, 0); |
0ab7befa | 1003 | x->u.binary.left->hit |= h; |
d7eb527d | 1004 | h |= match_expr_eval(x->u.binary.right, bol, eol, ctx, 1); |
0ab7befa JH |
1005 | break; |
1006 | default: | |
d7530708 | 1007 | die("Unexpected node type (internal error) %d", x->node); |
83b5d2f5 | 1008 | } |
0ab7befa JH |
1009 | if (collect_hits) |
1010 | x->hit |= h; | |
1011 | return h; | |
83b5d2f5 JH |
1012 | } |
1013 | ||
480c1ca6 | 1014 | static int match_expr(struct grep_opt *opt, char *bol, char *eol, |
0ab7befa | 1015 | enum grep_context ctx, int collect_hits) |
83b5d2f5 JH |
1016 | { |
1017 | struct grep_expr *x = opt->pattern_expression; | |
d7eb527d | 1018 | return match_expr_eval(x, bol, eol, ctx, collect_hits); |
83b5d2f5 JH |
1019 | } |
1020 | ||
480c1ca6 | 1021 | static int match_line(struct grep_opt *opt, char *bol, char *eol, |
0ab7befa | 1022 | enum grep_context ctx, int collect_hits) |
83b5d2f5 JH |
1023 | { |
1024 | struct grep_pat *p; | |
79212772 RS |
1025 | regmatch_t match; |
1026 | ||
83b5d2f5 | 1027 | if (opt->extended) |
0ab7befa JH |
1028 | return match_expr(opt, bol, eol, ctx, collect_hits); |
1029 | ||
1030 | /* we do not call with collect_hits without being extended */ | |
83b5d2f5 | 1031 | for (p = opt->pattern_list; p; p = p->next) { |
79212772 | 1032 | if (match_one_pattern(p, bol, eol, ctx, &match, 0)) |
83b5d2f5 JH |
1033 | return 1; |
1034 | } | |
1035 | return 0; | |
1036 | } | |
1037 | ||
7e8f59d5 RS |
1038 | static int match_next_pattern(struct grep_pat *p, char *bol, char *eol, |
1039 | enum grep_context ctx, | |
1040 | regmatch_t *pmatch, int eflags) | |
1041 | { | |
1042 | regmatch_t match; | |
1043 | ||
1044 | if (!match_one_pattern(p, bol, eol, ctx, &match, eflags)) | |
1045 | return 0; | |
1046 | if (match.rm_so < 0 || match.rm_eo < 0) | |
1047 | return 0; | |
1048 | if (pmatch->rm_so >= 0 && pmatch->rm_eo >= 0) { | |
1049 | if (match.rm_so > pmatch->rm_so) | |
1050 | return 1; | |
1051 | if (match.rm_so == pmatch->rm_so && match.rm_eo < pmatch->rm_eo) | |
1052 | return 1; | |
1053 | } | |
1054 | pmatch->rm_so = match.rm_so; | |
1055 | pmatch->rm_eo = match.rm_eo; | |
1056 | return 1; | |
1057 | } | |
1058 | ||
1059 | static int next_match(struct grep_opt *opt, char *bol, char *eol, | |
1060 | enum grep_context ctx, regmatch_t *pmatch, int eflags) | |
1061 | { | |
1062 | struct grep_pat *p; | |
1063 | int hit = 0; | |
1064 | ||
1065 | pmatch->rm_so = pmatch->rm_eo = -1; | |
1066 | if (bol < eol) { | |
1067 | for (p = opt->pattern_list; p; p = p->next) { | |
1068 | switch (p->token) { | |
1069 | case GREP_PATTERN: /* atom */ | |
1070 | case GREP_PATTERN_HEAD: | |
1071 | case GREP_PATTERN_BODY: | |
1072 | hit |= match_next_pattern(p, bol, eol, ctx, | |
1073 | pmatch, eflags); | |
1074 | break; | |
1075 | default: | |
1076 | break; | |
1077 | } | |
1078 | } | |
1079 | } | |
1080 | return hit; | |
1081 | } | |
1082 | ||
1083 | static void show_line(struct grep_opt *opt, char *bol, char *eol, | |
1084 | const char *name, unsigned lno, char sign) | |
1085 | { | |
1086 | int rest = eol - bol; | |
00588bb5 | 1087 | char *line_color = NULL; |
7e8f59d5 | 1088 | |
a8f0e764 RS |
1089 | if (opt->file_break && opt->last_shown == 0) { |
1090 | if (opt->show_hunk_mark) | |
1091 | opt->output(opt, "\n", 1); | |
ba8ea749 | 1092 | } else if (opt->pre_context || opt->post_context || opt->funcbody) { |
046802d0 | 1093 | if (opt->last_shown == 0) { |
55f638bd ML |
1094 | if (opt->show_hunk_mark) { |
1095 | output_color(opt, "--", 2, opt->color_sep); | |
1096 | opt->output(opt, "\n", 1); | |
07b838f0 | 1097 | } |
55f638bd ML |
1098 | } else if (lno > opt->last_shown + 1) { |
1099 | output_color(opt, "--", 2, opt->color_sep); | |
1100 | opt->output(opt, "\n", 1); | |
1101 | } | |
5dd06d38 | 1102 | } |
1d84f72e RS |
1103 | if (opt->heading && opt->last_shown == 0) { |
1104 | output_color(opt, name, strlen(name), opt->color_filename); | |
1105 | opt->output(opt, "\n", 1); | |
1106 | } | |
5dd06d38 RS |
1107 | opt->last_shown = lno; |
1108 | ||
1d84f72e | 1109 | if (!opt->heading && opt->pathname) { |
55f638bd ML |
1110 | output_color(opt, name, strlen(name), opt->color_filename); |
1111 | output_sep(opt, sign); | |
5b594f45 FK |
1112 | } |
1113 | if (opt->linenum) { | |
1114 | char buf[32]; | |
1115 | snprintf(buf, sizeof(buf), "%d", lno); | |
55f638bd ML |
1116 | output_color(opt, buf, strlen(buf), opt->color_lineno); |
1117 | output_sep(opt, sign); | |
5b594f45 | 1118 | } |
7e8f59d5 RS |
1119 | if (opt->color) { |
1120 | regmatch_t match; | |
1121 | enum grep_context ctx = GREP_CONTEXT_BODY; | |
1122 | int ch = *eol; | |
1123 | int eflags = 0; | |
1124 | ||
00588bb5 ML |
1125 | if (sign == ':') |
1126 | line_color = opt->color_selected; | |
1127 | else if (sign == '-') | |
1128 | line_color = opt->color_context; | |
1129 | else if (sign == '=') | |
1130 | line_color = opt->color_function; | |
7e8f59d5 RS |
1131 | *eol = '\0'; |
1132 | while (next_match(opt, bol, eol, ctx, &match, eflags)) { | |
1f5b9cc4 RS |
1133 | if (match.rm_so == match.rm_eo) |
1134 | break; | |
5b594f45 | 1135 | |
00588bb5 | 1136 | output_color(opt, bol, match.rm_so, line_color); |
55f638bd ML |
1137 | output_color(opt, bol + match.rm_so, |
1138 | match.rm_eo - match.rm_so, | |
1139 | opt->color_match); | |
7e8f59d5 RS |
1140 | bol += match.rm_eo; |
1141 | rest -= match.rm_eo; | |
1142 | eflags = REG_NOTBOL; | |
1143 | } | |
1144 | *eol = ch; | |
1145 | } | |
00588bb5 | 1146 | output_color(opt, bol, rest, line_color); |
5b594f45 | 1147 | opt->output(opt, "\n", 1); |
7e8f59d5 RS |
1148 | } |
1149 | ||
0579f91d | 1150 | #ifndef NO_PTHREADS |
78db6ea9 JK |
1151 | int grep_use_locks; |
1152 | ||
0579f91d TR |
1153 | /* |
1154 | * This lock protects access to the gitattributes machinery, which is | |
1155 | * not thread-safe. | |
1156 | */ | |
1157 | pthread_mutex_t grep_attr_mutex; | |
1158 | ||
78db6ea9 | 1159 | static inline void grep_attr_lock(void) |
0579f91d | 1160 | { |
78db6ea9 | 1161 | if (grep_use_locks) |
0579f91d TR |
1162 | pthread_mutex_lock(&grep_attr_mutex); |
1163 | } | |
1164 | ||
78db6ea9 | 1165 | static inline void grep_attr_unlock(void) |
0579f91d | 1166 | { |
78db6ea9 | 1167 | if (grep_use_locks) |
0579f91d TR |
1168 | pthread_mutex_unlock(&grep_attr_mutex); |
1169 | } | |
b3aeb285 JK |
1170 | |
1171 | /* | |
1172 | * Same as git_attr_mutex, but protecting the thread-unsafe object db access. | |
1173 | */ | |
1174 | pthread_mutex_t grep_read_mutex; | |
1175 | ||
0579f91d | 1176 | #else |
78db6ea9 JK |
1177 | #define grep_attr_lock() |
1178 | #define grep_attr_unlock() | |
0579f91d TR |
1179 | #endif |
1180 | ||
e1327023 | 1181 | static int match_funcname(struct grep_opt *opt, struct grep_source *gs, char *bol, char *eol) |
2944e4e6 | 1182 | { |
60ecac98 | 1183 | xdemitconf_t *xecfg = opt->priv; |
0579f91d | 1184 | if (xecfg && !xecfg->find_func) { |
94ad9d9e JK |
1185 | grep_source_load_driver(gs); |
1186 | if (gs->driver->funcname.pattern) { | |
1187 | const struct userdiff_funcname *pe = &gs->driver->funcname; | |
0579f91d TR |
1188 | xdiff_set_find_func(xecfg, pe->pattern, pe->cflags); |
1189 | } else { | |
1190 | xecfg = opt->priv = NULL; | |
1191 | } | |
1192 | } | |
1193 | ||
1194 | if (xecfg) { | |
60ecac98 RS |
1195 | char buf[1]; |
1196 | return xecfg->find_func(bol, eol - bol, buf, 1, | |
1197 | xecfg->find_func_priv) >= 0; | |
1198 | } | |
1199 | ||
2944e4e6 RS |
1200 | if (bol == eol) |
1201 | return 0; | |
1202 | if (isalpha(*bol) || *bol == '_' || *bol == '$') | |
1203 | return 1; | |
1204 | return 0; | |
1205 | } | |
1206 | ||
e1327023 JK |
1207 | static void show_funcname_line(struct grep_opt *opt, struct grep_source *gs, |
1208 | char *bol, unsigned lno) | |
2944e4e6 | 1209 | { |
e1327023 | 1210 | while (bol > gs->buf) { |
2944e4e6 RS |
1211 | char *eol = --bol; |
1212 | ||
e1327023 | 1213 | while (bol > gs->buf && bol[-1] != '\n') |
2944e4e6 RS |
1214 | bol--; |
1215 | lno--; | |
1216 | ||
1217 | if (lno <= opt->last_shown) | |
1218 | break; | |
1219 | ||
e1327023 JK |
1220 | if (match_funcname(opt, gs, bol, eol)) { |
1221 | show_line(opt, bol, eol, gs->name, lno, '='); | |
2944e4e6 RS |
1222 | break; |
1223 | } | |
1224 | } | |
1225 | } | |
1226 | ||
e1327023 | 1227 | static void show_pre_context(struct grep_opt *opt, struct grep_source *gs, |
ba8ea749 | 1228 | char *bol, char *end, unsigned lno) |
49de3216 | 1229 | { |
2944e4e6 | 1230 | unsigned cur = lno, from = 1, funcname_lno = 0; |
ba8ea749 RS |
1231 | int funcname_needed = !!opt->funcname; |
1232 | ||
e1327023 | 1233 | if (opt->funcbody && !match_funcname(opt, gs, bol, end)) |
ba8ea749 | 1234 | funcname_needed = 2; |
49de3216 RS |
1235 | |
1236 | if (opt->pre_context < lno) | |
1237 | from = lno - opt->pre_context; | |
1238 | if (from <= opt->last_shown) | |
1239 | from = opt->last_shown + 1; | |
1240 | ||
1241 | /* Rewind. */ | |
e1327023 | 1242 | while (bol > gs->buf && |
ba8ea749 | 1243 | cur > (funcname_needed == 2 ? opt->last_shown + 1 : from)) { |
2944e4e6 RS |
1244 | char *eol = --bol; |
1245 | ||
e1327023 | 1246 | while (bol > gs->buf && bol[-1] != '\n') |
49de3216 RS |
1247 | bol--; |
1248 | cur--; | |
e1327023 | 1249 | if (funcname_needed && match_funcname(opt, gs, bol, eol)) { |
2944e4e6 RS |
1250 | funcname_lno = cur; |
1251 | funcname_needed = 0; | |
1252 | } | |
49de3216 RS |
1253 | } |
1254 | ||
2944e4e6 RS |
1255 | /* We need to look even further back to find a function signature. */ |
1256 | if (opt->funcname && funcname_needed) | |
e1327023 | 1257 | show_funcname_line(opt, gs, bol, cur); |
2944e4e6 | 1258 | |
49de3216 RS |
1259 | /* Back forward. */ |
1260 | while (cur < lno) { | |
2944e4e6 | 1261 | char *eol = bol, sign = (cur == funcname_lno) ? '=' : '-'; |
49de3216 RS |
1262 | |
1263 | while (*eol != '\n') | |
1264 | eol++; | |
e1327023 | 1265 | show_line(opt, bol, eol, gs->name, cur, sign); |
49de3216 RS |
1266 | bol = eol + 1; |
1267 | cur++; | |
1268 | } | |
1269 | } | |
1270 | ||
a26345b6 JH |
1271 | static int should_lookahead(struct grep_opt *opt) |
1272 | { | |
1273 | struct grep_pat *p; | |
1274 | ||
1275 | if (opt->extended) | |
1276 | return 0; /* punt for too complex stuff */ | |
1277 | if (opt->invert) | |
1278 | return 0; | |
1279 | for (p = opt->pattern_list; p; p = p->next) { | |
1280 | if (p->token != GREP_PATTERN) | |
1281 | return 0; /* punt for "header only" and stuff */ | |
1282 | } | |
1283 | return 1; | |
1284 | } | |
1285 | ||
1286 | static int look_ahead(struct grep_opt *opt, | |
1287 | unsigned long *left_p, | |
1288 | unsigned *lno_p, | |
1289 | char **bol_p) | |
1290 | { | |
1291 | unsigned lno = *lno_p; | |
1292 | char *bol = *bol_p; | |
1293 | struct grep_pat *p; | |
1294 | char *sp, *last_bol; | |
1295 | regoff_t earliest = -1; | |
1296 | ||
1297 | for (p = opt->pattern_list; p; p = p->next) { | |
1298 | int hit; | |
1299 | regmatch_t m; | |
1300 | ||
97e77784 | 1301 | hit = patmatch(p, bol, bol + *left_p, &m, 0); |
a26345b6 JH |
1302 | if (!hit || m.rm_so < 0 || m.rm_eo < 0) |
1303 | continue; | |
1304 | if (earliest < 0 || m.rm_so < earliest) | |
1305 | earliest = m.rm_so; | |
1306 | } | |
1307 | ||
1308 | if (earliest < 0) { | |
1309 | *bol_p = bol + *left_p; | |
1310 | *left_p = 0; | |
1311 | return 1; | |
1312 | } | |
1313 | for (sp = bol + earliest; bol < sp && sp[-1] != '\n'; sp--) | |
1314 | ; /* find the beginning of the line */ | |
1315 | last_bol = sp; | |
1316 | ||
1317 | for (sp = bol; sp < last_bol; sp++) { | |
1318 | if (*sp == '\n') | |
1319 | lno++; | |
1320 | } | |
1321 | *left_p -= last_bol - bol; | |
1322 | *bol_p = last_bol; | |
1323 | *lno_p = lno; | |
1324 | return 0; | |
1325 | } | |
1326 | ||
5b594f45 FK |
1327 | static void std_output(struct grep_opt *opt, const void *buf, size_t size) |
1328 | { | |
1329 | fwrite(buf, size, 1, stdout); | |
1330 | } | |
1331 | ||
335ec3bf JK |
1332 | static int fill_textconv_grep(struct userdiff_driver *driver, |
1333 | struct grep_source *gs) | |
1334 | { | |
1335 | struct diff_filespec *df; | |
1336 | char *buf; | |
1337 | size_t size; | |
1338 | ||
1339 | if (!driver || !driver->textconv) | |
1340 | return grep_source_load(gs); | |
1341 | ||
1342 | /* | |
1343 | * The textconv interface is intimately tied to diff_filespecs, so we | |
1344 | * have to pretend to be one. If we could unify the grep_source | |
1345 | * and diff_filespec structs, this mess could just go away. | |
1346 | */ | |
1347 | df = alloc_filespec(gs->path); | |
1348 | switch (gs->type) { | |
1349 | case GREP_SOURCE_SHA1: | |
1350 | fill_filespec(df, gs->identifier, 1, 0100644); | |
1351 | break; | |
1352 | case GREP_SOURCE_FILE: | |
1353 | fill_filespec(df, null_sha1, 0, 0100644); | |
1354 | break; | |
1355 | default: | |
1356 | die("BUG: attempt to textconv something without a path?"); | |
1357 | } | |
1358 | ||
1359 | /* | |
1360 | * fill_textconv is not remotely thread-safe; it may load objects | |
1361 | * behind the scenes, and it modifies the global diff tempfile | |
1362 | * structure. | |
1363 | */ | |
1364 | grep_read_lock(); | |
1365 | size = fill_textconv(driver, df, &buf); | |
1366 | grep_read_unlock(); | |
1367 | free_filespec(df); | |
1368 | ||
1369 | /* | |
1370 | * The normal fill_textconv usage by the diff machinery would just keep | |
1371 | * the textconv'd buf separate from the diff_filespec. But much of the | |
1372 | * grep code passes around a grep_source and assumes that its "buf" | |
1373 | * pointer is the beginning of the thing we are searching. So let's | |
1374 | * install our textconv'd version into the grep_source, taking care not | |
1375 | * to leak any existing buffer. | |
1376 | */ | |
1377 | grep_source_clear_data(gs); | |
1378 | gs->buf = buf; | |
1379 | gs->size = size; | |
1380 | ||
1381 | return 0; | |
1382 | } | |
1383 | ||
e1327023 | 1384 | static int grep_source_1(struct grep_opt *opt, struct grep_source *gs, int collect_hits) |
83b5d2f5 | 1385 | { |
e1327023 JK |
1386 | char *bol; |
1387 | unsigned long left; | |
83b5d2f5 | 1388 | unsigned lno = 1; |
83b5d2f5 | 1389 | unsigned last_hit = 0; |
83b5d2f5 | 1390 | int binary_match_only = 0; |
83b5d2f5 | 1391 | unsigned count = 0; |
a26345b6 | 1392 | int try_lookahead = 0; |
ba8ea749 | 1393 | int show_function = 0; |
335ec3bf | 1394 | struct userdiff_driver *textconv = NULL; |
480c1ca6 | 1395 | enum grep_context ctx = GREP_CONTEXT_HEAD; |
60ecac98 | 1396 | xdemitconf_t xecfg; |
83b5d2f5 | 1397 | |
5b594f45 FK |
1398 | if (!opt->output) |
1399 | opt->output = std_output; | |
1400 | ||
ba8ea749 RS |
1401 | if (opt->pre_context || opt->post_context || opt->file_break || |
1402 | opt->funcbody) { | |
08303c36 RS |
1403 | /* Show hunk marks, except for the first file. */ |
1404 | if (opt->last_shown) | |
1405 | opt->show_hunk_mark = 1; | |
1406 | /* | |
1407 | * If we're using threads then we can't easily identify | |
1408 | * the first file. Always put hunk marks in that case | |
1409 | * and skip the very first one later in work_done(). | |
1410 | */ | |
1411 | if (opt->output != std_output) | |
1412 | opt->show_hunk_mark = 1; | |
1413 | } | |
431d6e7b RS |
1414 | opt->last_shown = 0; |
1415 | ||
335ec3bf JK |
1416 | if (opt->allow_textconv) { |
1417 | grep_source_load_driver(gs); | |
1418 | /* | |
1419 | * We might set up the shared textconv cache data here, which | |
1420 | * is not thread-safe. | |
1421 | */ | |
1422 | grep_attr_lock(); | |
1423 | textconv = userdiff_get_textconv(gs->driver); | |
1424 | grep_attr_unlock(); | |
1425 | } | |
1426 | ||
1427 | /* | |
1428 | * We know the result of a textconv is text, so we only have to care | |
1429 | * about binary handling if we are not using it. | |
1430 | */ | |
1431 | if (!textconv) { | |
1432 | switch (opt->binary) { | |
1433 | case GREP_BINARY_DEFAULT: | |
1434 | if (grep_source_is_binary(gs)) | |
1435 | binary_match_only = 1; | |
1436 | break; | |
1437 | case GREP_BINARY_NOMATCH: | |
1438 | if (grep_source_is_binary(gs)) | |
1439 | return 0; /* Assume unmatch */ | |
1440 | break; | |
1441 | case GREP_BINARY_TEXT: | |
1442 | break; | |
1443 | default: | |
1444 | die("bug: unknown binary handling mode"); | |
1445 | } | |
83b5d2f5 JH |
1446 | } |
1447 | ||
60ecac98 | 1448 | memset(&xecfg, 0, sizeof(xecfg)); |
0579f91d TR |
1449 | opt->priv = &xecfg; |
1450 | ||
a26345b6 | 1451 | try_lookahead = should_lookahead(opt); |
60ecac98 | 1452 | |
335ec3bf | 1453 | if (fill_textconv_grep(textconv, gs) < 0) |
08265798 JK |
1454 | return 0; |
1455 | ||
e1327023 JK |
1456 | bol = gs->buf; |
1457 | left = gs->size; | |
83b5d2f5 JH |
1458 | while (left) { |
1459 | char *eol, ch; | |
0ab7befa | 1460 | int hit; |
83b5d2f5 | 1461 | |
a26345b6 | 1462 | /* |
8997da38 | 1463 | * look_ahead() skips quickly to the line that possibly |
a26345b6 JH |
1464 | * has the next hit; don't call it if we need to do |
1465 | * something more than just skipping the current line | |
1466 | * in response to an unmatch for the current line. E.g. | |
1467 | * inside a post-context window, we will show the current | |
1468 | * line as a context around the previous hit when it | |
1469 | * doesn't hit. | |
1470 | */ | |
1471 | if (try_lookahead | |
1472 | && !(last_hit | |
ba8ea749 RS |
1473 | && (show_function || |
1474 | lno <= last_hit + opt->post_context)) | |
a26345b6 JH |
1475 | && look_ahead(opt, &left, &lno, &bol)) |
1476 | break; | |
83b5d2f5 JH |
1477 | eol = end_of_line(bol, &left); |
1478 | ch = *eol; | |
1479 | *eol = 0; | |
1480 | ||
480c1ca6 JH |
1481 | if ((ctx == GREP_CONTEXT_HEAD) && (eol == bol)) |
1482 | ctx = GREP_CONTEXT_BODY; | |
1483 | ||
0ab7befa | 1484 | hit = match_line(opt, bol, eol, ctx, collect_hits); |
83b5d2f5 JH |
1485 | *eol = ch; |
1486 | ||
0ab7befa JH |
1487 | if (collect_hits) |
1488 | goto next_line; | |
1489 | ||
83b5d2f5 JH |
1490 | /* "grep -v -e foo -e bla" should list lines |
1491 | * that do not have either, so inversion should | |
1492 | * be done outside. | |
1493 | */ | |
1494 | if (opt->invert) | |
1495 | hit = !hit; | |
1496 | if (opt->unmatch_name_only) { | |
1497 | if (hit) | |
1498 | return 0; | |
1499 | goto next_line; | |
1500 | } | |
1501 | if (hit) { | |
1502 | count++; | |
1503 | if (opt->status_only) | |
1504 | return 1; | |
321ffcc0 | 1505 | if (opt->name_only) { |
e1327023 | 1506 | show_name(opt, gs->name); |
321ffcc0 RS |
1507 | return 1; |
1508 | } | |
c30c10cf RS |
1509 | if (opt->count) |
1510 | goto next_line; | |
83b5d2f5 | 1511 | if (binary_match_only) { |
5b594f45 | 1512 | opt->output(opt, "Binary file ", 12); |
e1327023 | 1513 | output_color(opt, gs->name, strlen(gs->name), |
55f638bd | 1514 | opt->color_filename); |
5b594f45 | 1515 | opt->output(opt, " matches\n", 9); |
83b5d2f5 JH |
1516 | return 1; |
1517 | } | |
83b5d2f5 JH |
1518 | /* Hit at this line. If we haven't shown the |
1519 | * pre-context lines, we would need to show them. | |
83b5d2f5 | 1520 | */ |
ba8ea749 | 1521 | if (opt->pre_context || opt->funcbody) |
e1327023 | 1522 | show_pre_context(opt, gs, bol, eol, lno); |
2944e4e6 | 1523 | else if (opt->funcname) |
e1327023 JK |
1524 | show_funcname_line(opt, gs, bol, lno); |
1525 | show_line(opt, bol, eol, gs->name, lno, ':'); | |
5dd06d38 | 1526 | last_hit = lno; |
ba8ea749 RS |
1527 | if (opt->funcbody) |
1528 | show_function = 1; | |
1529 | goto next_line; | |
83b5d2f5 | 1530 | } |
e1327023 | 1531 | if (show_function && match_funcname(opt, gs, bol, eol)) |
ba8ea749 RS |
1532 | show_function = 0; |
1533 | if (show_function || | |
1534 | (last_hit && lno <= last_hit + opt->post_context)) { | |
83b5d2f5 JH |
1535 | /* If the last hit is within the post context, |
1536 | * we need to show this line. | |
1537 | */ | |
e1327023 | 1538 | show_line(opt, bol, eol, gs->name, lno, '-'); |
83b5d2f5 | 1539 | } |
83b5d2f5 JH |
1540 | |
1541 | next_line: | |
1542 | bol = eol + 1; | |
1543 | if (!left) | |
1544 | break; | |
1545 | left--; | |
1546 | lno++; | |
1547 | } | |
1548 | ||
0ab7befa JH |
1549 | if (collect_hits) |
1550 | return 0; | |
b48fb5b6 | 1551 | |
83b5d2f5 JH |
1552 | if (opt->status_only) |
1553 | return 0; | |
1554 | if (opt->unmatch_name_only) { | |
1555 | /* We did not see any hit, so we want to show this */ | |
e1327023 | 1556 | show_name(opt, gs->name); |
83b5d2f5 JH |
1557 | return 1; |
1558 | } | |
1559 | ||
60ecac98 RS |
1560 | xdiff_clear_find_func(&xecfg); |
1561 | opt->priv = NULL; | |
1562 | ||
83b5d2f5 JH |
1563 | /* NEEDSWORK: |
1564 | * The real "grep -c foo *.c" gives many "bar.c:0" lines, | |
1565 | * which feels mostly useless but sometimes useful. Maybe | |
1566 | * make it another option? For now suppress them. | |
1567 | */ | |
5b594f45 FK |
1568 | if (opt->count && count) { |
1569 | char buf[32]; | |
f76d947a RS |
1570 | if (opt->pathname) { |
1571 | output_color(opt, gs->name, strlen(gs->name), | |
1572 | opt->color_filename); | |
1573 | output_sep(opt, ':'); | |
1574 | } | |
55f638bd | 1575 | snprintf(buf, sizeof(buf), "%u\n", count); |
5b594f45 | 1576 | opt->output(opt, buf, strlen(buf)); |
c30c10cf | 1577 | return 1; |
5b594f45 | 1578 | } |
83b5d2f5 JH |
1579 | return !!last_hit; |
1580 | } | |
1581 | ||
0ab7befa JH |
1582 | static void clr_hit_marker(struct grep_expr *x) |
1583 | { | |
1584 | /* All-hit markers are meaningful only at the very top level | |
1585 | * OR node. | |
1586 | */ | |
1587 | while (1) { | |
1588 | x->hit = 0; | |
1589 | if (x->node != GREP_NODE_OR) | |
1590 | return; | |
1591 | x->u.binary.left->hit = 0; | |
1592 | x = x->u.binary.right; | |
1593 | } | |
1594 | } | |
1595 | ||
1596 | static int chk_hit_marker(struct grep_expr *x) | |
1597 | { | |
1598 | /* Top level nodes have hit markers. See if they all are hits */ | |
1599 | while (1) { | |
1600 | if (x->node != GREP_NODE_OR) | |
1601 | return x->hit; | |
1602 | if (!x->u.binary.left->hit) | |
1603 | return 0; | |
1604 | x = x->u.binary.right; | |
1605 | } | |
1606 | } | |
1607 | ||
e1327023 | 1608 | int grep_source(struct grep_opt *opt, struct grep_source *gs) |
0ab7befa JH |
1609 | { |
1610 | /* | |
1611 | * we do not have to do the two-pass grep when we do not check | |
1612 | * buffer-wide "all-match". | |
1613 | */ | |
1614 | if (!opt->all_match) | |
e1327023 | 1615 | return grep_source_1(opt, gs, 0); |
0ab7befa JH |
1616 | |
1617 | /* Otherwise the toplevel "or" terms hit a bit differently. | |
1618 | * We first clear hit markers from them. | |
1619 | */ | |
1620 | clr_hit_marker(opt->pattern_expression); | |
e1327023 | 1621 | grep_source_1(opt, gs, 1); |
0ab7befa JH |
1622 | |
1623 | if (!chk_hit_marker(opt->pattern_expression)) | |
1624 | return 0; | |
1625 | ||
e1327023 JK |
1626 | return grep_source_1(opt, gs, 0); |
1627 | } | |
1628 | ||
c876d6da | 1629 | int grep_buffer(struct grep_opt *opt, char *buf, unsigned long size) |
e1327023 JK |
1630 | { |
1631 | struct grep_source gs; | |
1632 | int r; | |
1633 | ||
55c61688 | 1634 | grep_source_init(&gs, GREP_SOURCE_BUF, NULL, NULL, NULL); |
e1327023 JK |
1635 | gs.buf = buf; |
1636 | gs.size = size; | |
1637 | ||
1638 | r = grep_source(opt, &gs); | |
1639 | ||
1640 | grep_source_clear(&gs); | |
1641 | return r; | |
1642 | } | |
1643 | ||
1644 | void grep_source_init(struct grep_source *gs, enum grep_source_type type, | |
55c61688 NTND |
1645 | const char *name, const char *path, |
1646 | const void *identifier) | |
e1327023 JK |
1647 | { |
1648 | gs->type = type; | |
1649 | gs->name = name ? xstrdup(name) : NULL; | |
55c61688 | 1650 | gs->path = path ? xstrdup(path) : NULL; |
e1327023 JK |
1651 | gs->buf = NULL; |
1652 | gs->size = 0; | |
94ad9d9e | 1653 | gs->driver = NULL; |
e1327023 JK |
1654 | |
1655 | switch (type) { | |
1656 | case GREP_SOURCE_FILE: | |
1657 | gs->identifier = xstrdup(identifier); | |
1658 | break; | |
1659 | case GREP_SOURCE_SHA1: | |
1660 | gs->identifier = xmalloc(20); | |
50546b15 | 1661 | hashcpy(gs->identifier, identifier); |
e1327023 JK |
1662 | break; |
1663 | case GREP_SOURCE_BUF: | |
1664 | gs->identifier = NULL; | |
1665 | } | |
1666 | } | |
1667 | ||
1668 | void grep_source_clear(struct grep_source *gs) | |
1669 | { | |
1670 | free(gs->name); | |
1671 | gs->name = NULL; | |
55c61688 NTND |
1672 | free(gs->path); |
1673 | gs->path = NULL; | |
e1327023 JK |
1674 | free(gs->identifier); |
1675 | gs->identifier = NULL; | |
1676 | grep_source_clear_data(gs); | |
1677 | } | |
1678 | ||
1679 | void grep_source_clear_data(struct grep_source *gs) | |
1680 | { | |
1681 | switch (gs->type) { | |
1682 | case GREP_SOURCE_FILE: | |
1683 | case GREP_SOURCE_SHA1: | |
1684 | free(gs->buf); | |
1685 | gs->buf = NULL; | |
1686 | gs->size = 0; | |
1687 | break; | |
1688 | case GREP_SOURCE_BUF: | |
1689 | /* leave user-provided buf intact */ | |
1690 | break; | |
1691 | } | |
1692 | } | |
1693 | ||
1694 | static int grep_source_load_sha1(struct grep_source *gs) | |
1695 | { | |
1696 | enum object_type type; | |
1697 | ||
1698 | grep_read_lock(); | |
1699 | gs->buf = read_sha1_file(gs->identifier, &type, &gs->size); | |
1700 | grep_read_unlock(); | |
1701 | ||
1702 | if (!gs->buf) | |
1703 | return error(_("'%s': unable to read %s"), | |
1704 | gs->name, | |
1705 | sha1_to_hex(gs->identifier)); | |
1706 | return 0; | |
1707 | } | |
1708 | ||
1709 | static int grep_source_load_file(struct grep_source *gs) | |
1710 | { | |
1711 | const char *filename = gs->identifier; | |
1712 | struct stat st; | |
1713 | char *data; | |
1714 | size_t size; | |
1715 | int i; | |
1716 | ||
1717 | if (lstat(filename, &st) < 0) { | |
1718 | err_ret: | |
1719 | if (errno != ENOENT) | |
1720 | error(_("'%s': %s"), filename, strerror(errno)); | |
1721 | return -1; | |
1722 | } | |
1723 | if (!S_ISREG(st.st_mode)) | |
1724 | return -1; | |
1725 | size = xsize_t(st.st_size); | |
1726 | i = open(filename, O_RDONLY); | |
1727 | if (i < 0) | |
1728 | goto err_ret; | |
1729 | data = xmalloc(size + 1); | |
1730 | if (st.st_size != read_in_full(i, data, size)) { | |
1731 | error(_("'%s': short read %s"), filename, strerror(errno)); | |
1732 | close(i); | |
1733 | free(data); | |
1734 | return -1; | |
1735 | } | |
1736 | close(i); | |
1737 | data[size] = 0; | |
1738 | ||
1739 | gs->buf = data; | |
1740 | gs->size = size; | |
1741 | return 0; | |
1742 | } | |
1743 | ||
3083301e | 1744 | static int grep_source_load(struct grep_source *gs) |
e1327023 JK |
1745 | { |
1746 | if (gs->buf) | |
1747 | return 0; | |
1748 | ||
1749 | switch (gs->type) { | |
1750 | case GREP_SOURCE_FILE: | |
1751 | return grep_source_load_file(gs); | |
1752 | case GREP_SOURCE_SHA1: | |
1753 | return grep_source_load_sha1(gs); | |
1754 | case GREP_SOURCE_BUF: | |
1755 | return gs->buf ? 0 : -1; | |
1756 | } | |
1757 | die("BUG: invalid grep_source type"); | |
0ab7befa | 1758 | } |
94ad9d9e JK |
1759 | |
1760 | void grep_source_load_driver(struct grep_source *gs) | |
1761 | { | |
1762 | if (gs->driver) | |
1763 | return; | |
1764 | ||
1765 | grep_attr_lock(); | |
55c61688 NTND |
1766 | if (gs->path) |
1767 | gs->driver = userdiff_find_by_path(gs->path); | |
94ad9d9e JK |
1768 | if (!gs->driver) |
1769 | gs->driver = userdiff_find_by_name("default"); | |
1770 | grep_attr_unlock(); | |
1771 | } | |
41b59bfc | 1772 | |
3083301e | 1773 | static int grep_source_is_binary(struct grep_source *gs) |
41b59bfc JK |
1774 | { |
1775 | grep_source_load_driver(gs); | |
1776 | if (gs->driver->binary != -1) | |
1777 | return gs->driver->binary; | |
1778 | ||
1779 | if (!grep_source_load(gs)) | |
1780 | return buffer_is_binary(gs->buf, gs->size); | |
1781 | ||
1782 | return 0; | |
1783 | } |