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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" |
83b5d2f5 | 5 | |
07a7d656 JH |
6 | static int grep_source_load(struct grep_source *gs); |
7 | static int grep_source_is_binary(struct grep_source *gs); | |
8 | ||
7687a054 JH |
9 | static struct grep_opt grep_defaults; |
10 | ||
11 | /* | |
12 | * Initialize the grep_defaults template with hardcoded defaults. | |
13 | * We could let the compiler do this, but without C99 initializers | |
14 | * the code gets unwieldy and unreadable, so... | |
15 | */ | |
16 | void init_grep_defaults(void) | |
17 | { | |
18 | struct grep_opt *opt = &grep_defaults; | |
918d4e1c JH |
19 | static int run_once; |
20 | ||
21 | if (run_once) | |
22 | return; | |
23 | run_once++; | |
7687a054 JH |
24 | |
25 | memset(opt, 0, sizeof(*opt)); | |
26 | opt->relative = 1; | |
27 | opt->pathname = 1; | |
28 | opt->regflags = REG_NEWLINE; | |
29 | opt->max_depth = -1; | |
30 | opt->pattern_type_option = GREP_PATTERN_TYPE_UNSPECIFIED; | |
31 | opt->extended_regexp_option = 0; | |
32 | strcpy(opt->color_context, ""); | |
33 | strcpy(opt->color_filename, ""); | |
34 | strcpy(opt->color_function, ""); | |
35 | strcpy(opt->color_lineno, ""); | |
36 | strcpy(opt->color_match, GIT_COLOR_BOLD_RED); | |
37 | strcpy(opt->color_selected, ""); | |
38 | strcpy(opt->color_sep, GIT_COLOR_CYAN); | |
39 | opt->color = -1; | |
40 | } | |
41 | ||
42 | static int parse_pattern_type_arg(const char *opt, const char *arg) | |
43 | { | |
44 | if (!strcmp(arg, "default")) | |
45 | return GREP_PATTERN_TYPE_UNSPECIFIED; | |
46 | else if (!strcmp(arg, "basic")) | |
47 | return GREP_PATTERN_TYPE_BRE; | |
48 | else if (!strcmp(arg, "extended")) | |
49 | return GREP_PATTERN_TYPE_ERE; | |
50 | else if (!strcmp(arg, "fixed")) | |
51 | return GREP_PATTERN_TYPE_FIXED; | |
52 | else if (!strcmp(arg, "perl")) | |
53 | return GREP_PATTERN_TYPE_PCRE; | |
54 | die("bad %s argument: %s", opt, arg); | |
55 | } | |
56 | ||
57 | /* | |
58 | * Read the configuration file once and store it in | |
59 | * the grep_defaults template. | |
60 | */ | |
61 | int grep_config(const char *var, const char *value, void *cb) | |
62 | { | |
63 | struct grep_opt *opt = &grep_defaults; | |
64 | char *color = NULL; | |
65 | ||
66 | if (userdiff_config(var, value) < 0) | |
67 | return -1; | |
68 | ||
69 | if (!strcmp(var, "grep.extendedregexp")) { | |
70 | if (git_config_bool(var, value)) | |
71 | opt->extended_regexp_option = 1; | |
72 | else | |
73 | opt->extended_regexp_option = 0; | |
74 | return 0; | |
75 | } | |
76 | ||
77 | if (!strcmp(var, "grep.patterntype")) { | |
78 | opt->pattern_type_option = parse_pattern_type_arg(var, value); | |
79 | return 0; | |
80 | } | |
81 | ||
82 | if (!strcmp(var, "grep.linenumber")) { | |
83 | opt->linenum = git_config_bool(var, value); | |
84 | return 0; | |
85 | } | |
86 | ||
87 | if (!strcmp(var, "color.grep")) | |
88 | opt->color = git_config_colorbool(var, value); | |
89 | else if (!strcmp(var, "color.grep.context")) | |
90 | color = opt->color_context; | |
91 | else if (!strcmp(var, "color.grep.filename")) | |
92 | color = opt->color_filename; | |
93 | else if (!strcmp(var, "color.grep.function")) | |
94 | color = opt->color_function; | |
95 | else if (!strcmp(var, "color.grep.linenumber")) | |
96 | color = opt->color_lineno; | |
97 | else if (!strcmp(var, "color.grep.match")) | |
98 | color = opt->color_match; | |
99 | else if (!strcmp(var, "color.grep.selected")) | |
100 | color = opt->color_selected; | |
101 | else if (!strcmp(var, "color.grep.separator")) | |
102 | color = opt->color_sep; | |
103 | ||
104 | if (color) { | |
105 | if (!value) | |
106 | return config_error_nonbool(var); | |
107 | color_parse(value, var, color); | |
108 | } | |
109 | return 0; | |
110 | } | |
111 | ||
112 | /* | |
113 | * Initialize one instance of grep_opt and copy the | |
114 | * default values from the template we read the configuration | |
115 | * information in an earlier call to git_config(grep_config). | |
116 | */ | |
117 | void grep_init(struct grep_opt *opt, const char *prefix) | |
118 | { | |
119 | struct grep_opt *def = &grep_defaults; | |
120 | ||
121 | memset(opt, 0, sizeof(*opt)); | |
122 | opt->prefix = prefix; | |
123 | opt->prefix_length = (prefix && *prefix) ? strlen(prefix) : 0; | |
124 | opt->pattern_tail = &opt->pattern_list; | |
125 | opt->header_tail = &opt->header_list; | |
126 | ||
127 | opt->color = def->color; | |
128 | opt->extended_regexp_option = def->extended_regexp_option; | |
129 | opt->pattern_type_option = def->pattern_type_option; | |
130 | opt->linenum = def->linenum; | |
131 | opt->max_depth = def->max_depth; | |
132 | opt->pathname = def->pathname; | |
133 | opt->regflags = def->regflags; | |
134 | opt->relative = def->relative; | |
135 | ||
136 | strcpy(opt->color_context, def->color_context); | |
137 | strcpy(opt->color_filename, def->color_filename); | |
138 | strcpy(opt->color_function, def->color_function); | |
139 | strcpy(opt->color_lineno, def->color_lineno); | |
140 | strcpy(opt->color_match, def->color_match); | |
141 | strcpy(opt->color_selected, def->color_selected); | |
142 | strcpy(opt->color_sep, def->color_sep); | |
143 | } | |
07a7d656 | 144 | |
c5c31d33 JH |
145 | void grep_commit_pattern_type(enum grep_pattern_type pattern_type, struct grep_opt *opt) |
146 | { | |
147 | if (pattern_type != GREP_PATTERN_TYPE_UNSPECIFIED) | |
148 | grep_set_pattern_type_option(pattern_type, opt); | |
149 | else if (opt->pattern_type_option != GREP_PATTERN_TYPE_UNSPECIFIED) | |
150 | grep_set_pattern_type_option(opt->pattern_type_option, opt); | |
151 | else if (opt->extended_regexp_option) | |
152 | grep_set_pattern_type_option(GREP_PATTERN_TYPE_ERE, opt); | |
153 | } | |
154 | ||
155 | void grep_set_pattern_type_option(enum grep_pattern_type pattern_type, struct grep_opt *opt) | |
156 | { | |
157 | switch (pattern_type) { | |
158 | case GREP_PATTERN_TYPE_UNSPECIFIED: | |
159 | /* fall through */ | |
160 | ||
161 | case GREP_PATTERN_TYPE_BRE: | |
162 | opt->fixed = 0; | |
163 | opt->pcre = 0; | |
164 | opt->regflags &= ~REG_EXTENDED; | |
165 | break; | |
166 | ||
167 | case GREP_PATTERN_TYPE_ERE: | |
168 | opt->fixed = 0; | |
169 | opt->pcre = 0; | |
170 | opt->regflags |= REG_EXTENDED; | |
171 | break; | |
172 | ||
173 | case GREP_PATTERN_TYPE_FIXED: | |
174 | opt->fixed = 1; | |
175 | opt->pcre = 0; | |
176 | opt->regflags &= ~REG_EXTENDED; | |
177 | break; | |
178 | ||
179 | case GREP_PATTERN_TYPE_PCRE: | |
180 | opt->fixed = 0; | |
181 | opt->pcre = 1; | |
182 | opt->regflags &= ~REG_EXTENDED; | |
183 | break; | |
184 | } | |
185 | } | |
186 | ||
fc456751 RS |
187 | static struct grep_pat *create_grep_pat(const char *pat, size_t patlen, |
188 | const char *origin, int no, | |
189 | enum grep_pat_token t, | |
190 | enum grep_header_field field) | |
a4d7d2c6 JH |
191 | { |
192 | struct grep_pat *p = xcalloc(1, sizeof(*p)); | |
526a858a | 193 | p->pattern = xmemdupz(pat, patlen); |
fc456751 RS |
194 | p->patternlen = patlen; |
195 | p->origin = origin; | |
196 | p->no = no; | |
197 | p->token = t; | |
a4d7d2c6 | 198 | p->field = field; |
fc456751 RS |
199 | return p; |
200 | } | |
201 | ||
2b3873ff RS |
202 | static void do_append_grep_pat(struct grep_pat ***tail, struct grep_pat *p) |
203 | { | |
204 | **tail = p; | |
205 | *tail = &p->next; | |
a4d7d2c6 | 206 | p->next = NULL; |
526a858a RS |
207 | |
208 | switch (p->token) { | |
209 | case GREP_PATTERN: /* atom */ | |
210 | case GREP_PATTERN_HEAD: | |
211 | case GREP_PATTERN_BODY: | |
212 | for (;;) { | |
213 | struct grep_pat *new_pat; | |
214 | size_t len = 0; | |
215 | char *cp = p->pattern + p->patternlen, *nl = NULL; | |
216 | while (++len <= p->patternlen) { | |
217 | if (*(--cp) == '\n') { | |
218 | nl = cp; | |
219 | break; | |
220 | } | |
221 | } | |
222 | if (!nl) | |
223 | break; | |
224 | new_pat = create_grep_pat(nl + 1, len - 1, p->origin, | |
225 | p->no, p->token, p->field); | |
226 | new_pat->next = p->next; | |
227 | if (!p->next) | |
228 | *tail = &new_pat->next; | |
229 | p->next = new_pat; | |
230 | *nl = '\0'; | |
231 | p->patternlen -= len; | |
232 | } | |
233 | break; | |
234 | default: | |
235 | break; | |
236 | } | |
2b3873ff RS |
237 | } |
238 | ||
fc456751 RS |
239 | void append_header_grep_pattern(struct grep_opt *opt, |
240 | enum grep_header_field field, const char *pat) | |
241 | { | |
242 | struct grep_pat *p = create_grep_pat(pat, strlen(pat), "header", 0, | |
243 | GREP_PATTERN_HEAD, field); | |
baa6378f JH |
244 | if (field == GREP_HEADER_REFLOG) |
245 | opt->use_reflog_filter = 1; | |
2b3873ff | 246 | do_append_grep_pat(&opt->header_tail, p); |
a4d7d2c6 JH |
247 | } |
248 | ||
83b5d2f5 JH |
249 | void append_grep_pattern(struct grep_opt *opt, const char *pat, |
250 | const char *origin, int no, enum grep_pat_token t) | |
ed40a095 RS |
251 | { |
252 | append_grep_pat(opt, pat, strlen(pat), origin, no, t); | |
253 | } | |
254 | ||
255 | void append_grep_pat(struct grep_opt *opt, const char *pat, size_t patlen, | |
256 | const char *origin, int no, enum grep_pat_token t) | |
83b5d2f5 | 257 | { |
fc456751 | 258 | struct grep_pat *p = create_grep_pat(pat, patlen, origin, no, t, 0); |
2b3873ff | 259 | do_append_grep_pat(&opt->pattern_tail, p); |
83b5d2f5 JH |
260 | } |
261 | ||
5b594f45 FK |
262 | struct grep_opt *grep_opt_dup(const struct grep_opt *opt) |
263 | { | |
264 | struct grep_pat *pat; | |
265 | struct grep_opt *ret = xmalloc(sizeof(struct grep_opt)); | |
266 | *ret = *opt; | |
267 | ||
268 | ret->pattern_list = NULL; | |
269 | ret->pattern_tail = &ret->pattern_list; | |
270 | ||
271 | for(pat = opt->pattern_list; pat != NULL; pat = pat->next) | |
272 | { | |
273 | if(pat->token == GREP_PATTERN_HEAD) | |
274 | append_header_grep_pattern(ret, pat->field, | |
275 | pat->pattern); | |
276 | else | |
ed40a095 RS |
277 | append_grep_pat(ret, pat->pattern, pat->patternlen, |
278 | pat->origin, pat->no, pat->token); | |
5b594f45 FK |
279 | } |
280 | ||
281 | return ret; | |
282 | } | |
283 | ||
a30c148a MK |
284 | static NORETURN void compile_regexp_failed(const struct grep_pat *p, |
285 | const char *error) | |
286 | { | |
287 | char where[1024]; | |
288 | ||
289 | if (p->no) | |
290 | sprintf(where, "In '%s' at %d, ", p->origin, p->no); | |
291 | else if (p->origin) | |
292 | sprintf(where, "%s, ", p->origin); | |
293 | else | |
294 | where[0] = 0; | |
295 | ||
296 | die("%s'%s': %s", where, p->pattern, error); | |
297 | } | |
298 | ||
63e7e9d8 MK |
299 | #ifdef USE_LIBPCRE |
300 | static void compile_pcre_regexp(struct grep_pat *p, const struct grep_opt *opt) | |
301 | { | |
302 | const char *error; | |
303 | int erroffset; | |
fba4f125 | 304 | int options = PCRE_MULTILINE; |
63e7e9d8 MK |
305 | |
306 | if (opt->ignore_case) | |
307 | options |= PCRE_CASELESS; | |
308 | ||
309 | p->pcre_regexp = pcre_compile(p->pattern, options, &error, &erroffset, | |
310 | NULL); | |
311 | if (!p->pcre_regexp) | |
312 | compile_regexp_failed(p, error); | |
313 | ||
314 | p->pcre_extra_info = pcre_study(p->pcre_regexp, 0, &error); | |
315 | if (!p->pcre_extra_info && error) | |
316 | die("%s", error); | |
317 | } | |
318 | ||
319 | static int pcrematch(struct grep_pat *p, const char *line, const char *eol, | |
320 | regmatch_t *match, int eflags) | |
321 | { | |
322 | int ovector[30], ret, flags = 0; | |
323 | ||
324 | if (eflags & REG_NOTBOL) | |
325 | flags |= PCRE_NOTBOL; | |
326 | ||
327 | ret = pcre_exec(p->pcre_regexp, p->pcre_extra_info, line, eol - line, | |
328 | 0, flags, ovector, ARRAY_SIZE(ovector)); | |
329 | if (ret < 0 && ret != PCRE_ERROR_NOMATCH) | |
330 | die("pcre_exec failed with error code %d", ret); | |
331 | if (ret > 0) { | |
332 | ret = 0; | |
333 | match->rm_so = ovector[0]; | |
334 | match->rm_eo = ovector[1]; | |
335 | } | |
336 | ||
337 | return ret; | |
338 | } | |
339 | ||
340 | static void free_pcre_regexp(struct grep_pat *p) | |
341 | { | |
342 | pcre_free(p->pcre_regexp); | |
343 | pcre_free(p->pcre_extra_info); | |
344 | } | |
345 | #else /* !USE_LIBPCRE */ | |
346 | static void compile_pcre_regexp(struct grep_pat *p, const struct grep_opt *opt) | |
347 | { | |
348 | die("cannot use Perl-compatible regexes when not compiled with USE_LIBPCRE"); | |
349 | } | |
350 | ||
351 | static int pcrematch(struct grep_pat *p, const char *line, const char *eol, | |
352 | regmatch_t *match, int eflags) | |
353 | { | |
354 | return 1; | |
355 | } | |
356 | ||
357 | static void free_pcre_regexp(struct grep_pat *p) | |
358 | { | |
359 | } | |
360 | #endif /* !USE_LIBPCRE */ | |
361 | ||
9eceddee FK |
362 | static int is_fixed(const char *s, size_t len) |
363 | { | |
364 | size_t i; | |
365 | ||
366 | /* regcomp cannot accept patterns with NULs so we | |
367 | * consider any pattern containing a NUL fixed. | |
368 | */ | |
369 | if (memchr(s, 0, len)) | |
370 | return 1; | |
371 | ||
372 | for (i = 0; i < len; i++) { | |
373 | if (is_regex_special(s[i])) | |
374 | return 0; | |
375 | } | |
376 | ||
377 | return 1; | |
378 | } | |
379 | ||
83b5d2f5 JH |
380 | static void compile_regexp(struct grep_pat *p, struct grep_opt *opt) |
381 | { | |
c822255c RS |
382 | int err; |
383 | ||
d7eb527d | 384 | p->word_regexp = opt->word_regexp; |
5183bf67 | 385 | p->ignore_case = opt->ignore_case; |
d7eb527d | 386 | |
9eceddee FK |
387 | if (opt->fixed || is_fixed(p->pattern, p->patternlen)) |
388 | p->fixed = 1; | |
389 | else | |
390 | p->fixed = 0; | |
391 | ||
392 | if (p->fixed) { | |
0f871cf5 JH |
393 | if (opt->regflags & REG_ICASE || p->ignore_case) |
394 | p->kws = kwsalloc(tolower_trans_tbl); | |
395 | else | |
9eceddee | 396 | p->kws = kwsalloc(NULL); |
9eceddee FK |
397 | kwsincr(p->kws, p->pattern, p->patternlen); |
398 | kwsprep(p->kws); | |
c822255c | 399 | return; |
9eceddee | 400 | } |
c822255c | 401 | |
63e7e9d8 MK |
402 | if (opt->pcre) { |
403 | compile_pcre_regexp(p, opt); | |
404 | return; | |
405 | } | |
406 | ||
c822255c | 407 | err = regcomp(&p->regexp, p->pattern, opt->regflags); |
83b5d2f5 JH |
408 | if (err) { |
409 | char errbuf[1024]; | |
83b5d2f5 JH |
410 | regerror(err, &p->regexp, errbuf, 1024); |
411 | regfree(&p->regexp); | |
a30c148a | 412 | compile_regexp_failed(p, errbuf); |
83b5d2f5 JH |
413 | } |
414 | } | |
415 | ||
0ab7befa | 416 | static struct grep_expr *compile_pattern_or(struct grep_pat **); |
83b5d2f5 JH |
417 | static struct grep_expr *compile_pattern_atom(struct grep_pat **list) |
418 | { | |
419 | struct grep_pat *p; | |
420 | struct grep_expr *x; | |
421 | ||
422 | p = *list; | |
c922b01f LT |
423 | if (!p) |
424 | return NULL; | |
83b5d2f5 JH |
425 | switch (p->token) { |
426 | case GREP_PATTERN: /* atom */ | |
480c1ca6 JH |
427 | case GREP_PATTERN_HEAD: |
428 | case GREP_PATTERN_BODY: | |
83b5d2f5 JH |
429 | x = xcalloc(1, sizeof (struct grep_expr)); |
430 | x->node = GREP_NODE_ATOM; | |
431 | x->u.atom = p; | |
432 | *list = p->next; | |
433 | return x; | |
434 | case GREP_OPEN_PAREN: | |
435 | *list = p->next; | |
0ab7befa | 436 | x = compile_pattern_or(list); |
83b5d2f5 JH |
437 | if (!*list || (*list)->token != GREP_CLOSE_PAREN) |
438 | die("unmatched parenthesis"); | |
439 | *list = (*list)->next; | |
440 | return x; | |
441 | default: | |
442 | return NULL; | |
443 | } | |
444 | } | |
445 | ||
446 | static struct grep_expr *compile_pattern_not(struct grep_pat **list) | |
447 | { | |
448 | struct grep_pat *p; | |
449 | struct grep_expr *x; | |
450 | ||
451 | p = *list; | |
c922b01f LT |
452 | if (!p) |
453 | return NULL; | |
83b5d2f5 JH |
454 | switch (p->token) { |
455 | case GREP_NOT: | |
456 | if (!p->next) | |
457 | die("--not not followed by pattern expression"); | |
458 | *list = p->next; | |
459 | x = xcalloc(1, sizeof (struct grep_expr)); | |
460 | x->node = GREP_NODE_NOT; | |
461 | x->u.unary = compile_pattern_not(list); | |
462 | if (!x->u.unary) | |
463 | die("--not followed by non pattern expression"); | |
464 | return x; | |
465 | default: | |
466 | return compile_pattern_atom(list); | |
467 | } | |
468 | } | |
469 | ||
470 | static struct grep_expr *compile_pattern_and(struct grep_pat **list) | |
471 | { | |
472 | struct grep_pat *p; | |
473 | struct grep_expr *x, *y, *z; | |
474 | ||
475 | x = compile_pattern_not(list); | |
476 | p = *list; | |
477 | if (p && p->token == GREP_AND) { | |
478 | if (!p->next) | |
479 | die("--and not followed by pattern expression"); | |
480 | *list = p->next; | |
481 | y = compile_pattern_and(list); | |
482 | if (!y) | |
483 | die("--and not followed by pattern expression"); | |
484 | z = xcalloc(1, sizeof (struct grep_expr)); | |
485 | z->node = GREP_NODE_AND; | |
486 | z->u.binary.left = x; | |
487 | z->u.binary.right = y; | |
488 | return z; | |
489 | } | |
490 | return x; | |
491 | } | |
492 | ||
493 | static struct grep_expr *compile_pattern_or(struct grep_pat **list) | |
494 | { | |
495 | struct grep_pat *p; | |
496 | struct grep_expr *x, *y, *z; | |
497 | ||
498 | x = compile_pattern_and(list); | |
499 | p = *list; | |
500 | if (x && p && p->token != GREP_CLOSE_PAREN) { | |
501 | y = compile_pattern_or(list); | |
502 | if (!y) | |
503 | die("not a pattern expression %s", p->pattern); | |
504 | z = xcalloc(1, sizeof (struct grep_expr)); | |
505 | z->node = GREP_NODE_OR; | |
506 | z->u.binary.left = x; | |
507 | z->u.binary.right = y; | |
508 | return z; | |
509 | } | |
510 | return x; | |
511 | } | |
512 | ||
513 | static struct grep_expr *compile_pattern_expr(struct grep_pat **list) | |
514 | { | |
515 | return compile_pattern_or(list); | |
516 | } | |
517 | ||
17bf35a3 JH |
518 | static void indent(int in) |
519 | { | |
520 | while (in-- > 0) | |
521 | fputc(' ', stderr); | |
522 | } | |
523 | ||
524 | static void dump_grep_pat(struct grep_pat *p) | |
525 | { | |
526 | switch (p->token) { | |
527 | case GREP_AND: fprintf(stderr, "*and*"); break; | |
528 | case GREP_OPEN_PAREN: fprintf(stderr, "*(*"); break; | |
529 | case GREP_CLOSE_PAREN: fprintf(stderr, "*)*"); break; | |
530 | case GREP_NOT: fprintf(stderr, "*not*"); break; | |
531 | case GREP_OR: fprintf(stderr, "*or*"); break; | |
532 | ||
533 | case GREP_PATTERN: fprintf(stderr, "pattern"); break; | |
534 | case GREP_PATTERN_HEAD: fprintf(stderr, "pattern_head"); break; | |
535 | case GREP_PATTERN_BODY: fprintf(stderr, "pattern_body"); break; | |
536 | } | |
537 | ||
538 | switch (p->token) { | |
539 | default: break; | |
540 | case GREP_PATTERN_HEAD: | |
541 | fprintf(stderr, "<head %d>", p->field); break; | |
542 | case GREP_PATTERN_BODY: | |
543 | fprintf(stderr, "<body>"); break; | |
544 | } | |
545 | switch (p->token) { | |
546 | default: break; | |
547 | case GREP_PATTERN_HEAD: | |
548 | case GREP_PATTERN_BODY: | |
549 | case GREP_PATTERN: | |
550 | fprintf(stderr, "%.*s", (int)p->patternlen, p->pattern); | |
551 | break; | |
552 | } | |
553 | fputc('\n', stderr); | |
554 | } | |
555 | ||
556 | static void dump_grep_expression_1(struct grep_expr *x, int in) | |
557 | { | |
558 | indent(in); | |
559 | switch (x->node) { | |
560 | case GREP_NODE_TRUE: | |
561 | fprintf(stderr, "true\n"); | |
562 | break; | |
563 | case GREP_NODE_ATOM: | |
564 | dump_grep_pat(x->u.atom); | |
565 | break; | |
566 | case GREP_NODE_NOT: | |
567 | fprintf(stderr, "(not\n"); | |
568 | dump_grep_expression_1(x->u.unary, in+1); | |
569 | indent(in); | |
570 | fprintf(stderr, ")\n"); | |
571 | break; | |
572 | case GREP_NODE_AND: | |
573 | fprintf(stderr, "(and\n"); | |
574 | dump_grep_expression_1(x->u.binary.left, in+1); | |
575 | dump_grep_expression_1(x->u.binary.right, in+1); | |
576 | indent(in); | |
577 | fprintf(stderr, ")\n"); | |
578 | break; | |
579 | case GREP_NODE_OR: | |
580 | fprintf(stderr, "(or\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 | } | |
587 | } | |
588 | ||
07a7d656 | 589 | static void dump_grep_expression(struct grep_opt *opt) |
17bf35a3 JH |
590 | { |
591 | struct grep_expr *x = opt->pattern_expression; | |
592 | ||
593 | if (opt->all_match) | |
594 | fprintf(stderr, "[all-match]\n"); | |
595 | dump_grep_expression_1(x, 0); | |
596 | fflush(NULL); | |
597 | } | |
598 | ||
5aaeb733 JH |
599 | static struct grep_expr *grep_true_expr(void) |
600 | { | |
601 | struct grep_expr *z = xcalloc(1, sizeof(*z)); | |
602 | z->node = GREP_NODE_TRUE; | |
603 | return z; | |
604 | } | |
605 | ||
606 | static struct grep_expr *grep_or_expr(struct grep_expr *left, struct grep_expr *right) | |
607 | { | |
608 | struct grep_expr *z = xcalloc(1, sizeof(*z)); | |
609 | z->node = GREP_NODE_OR; | |
610 | z->u.binary.left = left; | |
611 | z->u.binary.right = right; | |
612 | return z; | |
613 | } | |
614 | ||
95ce9ce2 | 615 | static struct grep_expr *prep_header_patterns(struct grep_opt *opt) |
83b5d2f5 JH |
616 | { |
617 | struct grep_pat *p; | |
95ce9ce2 | 618 | struct grep_expr *header_expr; |
5aaeb733 JH |
619 | struct grep_expr *(header_group[GREP_HEADER_FIELD_MAX]); |
620 | enum grep_header_field fld; | |
83b5d2f5 | 621 | |
95ce9ce2 JH |
622 | if (!opt->header_list) |
623 | return NULL; | |
2385f246 | 624 | |
95ce9ce2 JH |
625 | for (p = opt->header_list; p; p = p->next) { |
626 | if (p->token != GREP_PATTERN_HEAD) | |
627 | die("bug: a non-header pattern in grep header list."); | |
3ce3ffb8 AP |
628 | if (p->field < GREP_HEADER_FIELD_MIN || |
629 | GREP_HEADER_FIELD_MAX <= p->field) | |
95ce9ce2 JH |
630 | die("bug: unknown header field %d", p->field); |
631 | compile_regexp(p, opt); | |
80235ba7 | 632 | } |
5aaeb733 JH |
633 | |
634 | for (fld = 0; fld < GREP_HEADER_FIELD_MAX; fld++) | |
635 | header_group[fld] = NULL; | |
636 | ||
637 | for (p = opt->header_list; p; p = p->next) { | |
638 | struct grep_expr *h; | |
639 | struct grep_pat *pp = p; | |
640 | ||
641 | h = compile_pattern_atom(&pp); | |
642 | if (!h || pp != p->next) | |
643 | die("bug: malformed header expr"); | |
644 | if (!header_group[p->field]) { | |
645 | header_group[p->field] = h; | |
646 | continue; | |
647 | } | |
648 | header_group[p->field] = grep_or_expr(h, header_group[p->field]); | |
649 | } | |
650 | ||
651 | header_expr = NULL; | |
652 | ||
653 | for (fld = 0; fld < GREP_HEADER_FIELD_MAX; fld++) { | |
654 | if (!header_group[fld]) | |
655 | continue; | |
656 | if (!header_expr) | |
657 | header_expr = grep_true_expr(); | |
658 | header_expr = grep_or_expr(header_group[fld], header_expr); | |
659 | } | |
95ce9ce2 JH |
660 | return header_expr; |
661 | } | |
662 | ||
13e4fc7e JH |
663 | static struct grep_expr *grep_splice_or(struct grep_expr *x, struct grep_expr *y) |
664 | { | |
665 | struct grep_expr *z = x; | |
666 | ||
667 | while (x) { | |
668 | assert(x->node == GREP_NODE_OR); | |
669 | if (x->u.binary.right && | |
670 | x->u.binary.right->node == GREP_NODE_TRUE) { | |
671 | x->u.binary.right = y; | |
672 | break; | |
673 | } | |
674 | x = x->u.binary.right; | |
675 | } | |
676 | return z; | |
677 | } | |
678 | ||
17bf35a3 | 679 | static void compile_grep_patterns_real(struct grep_opt *opt) |
95ce9ce2 JH |
680 | { |
681 | struct grep_pat *p; | |
682 | struct grep_expr *header_expr = prep_header_patterns(opt); | |
0ab7befa | 683 | |
83b5d2f5 | 684 | for (p = opt->pattern_list; p; p = p->next) { |
480c1ca6 JH |
685 | switch (p->token) { |
686 | case GREP_PATTERN: /* atom */ | |
687 | case GREP_PATTERN_HEAD: | |
688 | case GREP_PATTERN_BODY: | |
c822255c | 689 | compile_regexp(p, opt); |
480c1ca6 JH |
690 | break; |
691 | default: | |
83b5d2f5 | 692 | opt->extended = 1; |
480c1ca6 JH |
693 | break; |
694 | } | |
83b5d2f5 JH |
695 | } |
696 | ||
80235ba7 JH |
697 | if (opt->all_match || header_expr) |
698 | opt->extended = 1; | |
17bf35a3 | 699 | else if (!opt->extended && !opt->debug) |
83b5d2f5 JH |
700 | return; |
701 | ||
83b5d2f5 | 702 | p = opt->pattern_list; |
ba150a3f MB |
703 | if (p) |
704 | opt->pattern_expression = compile_pattern_expr(&p); | |
83b5d2f5 JH |
705 | if (p) |
706 | die("incomplete pattern expression: %s", p->pattern); | |
80235ba7 JH |
707 | |
708 | if (!header_expr) | |
709 | return; | |
710 | ||
5aaeb733 | 711 | if (!opt->pattern_expression) |
80235ba7 | 712 | opt->pattern_expression = header_expr; |
13e4fc7e JH |
713 | else if (opt->all_match) |
714 | opt->pattern_expression = grep_splice_or(header_expr, | |
715 | opt->pattern_expression); | |
5aaeb733 JH |
716 | else |
717 | opt->pattern_expression = grep_or_expr(opt->pattern_expression, | |
718 | header_expr); | |
80235ba7 | 719 | opt->all_match = 1; |
83b5d2f5 JH |
720 | } |
721 | ||
17bf35a3 JH |
722 | void compile_grep_patterns(struct grep_opt *opt) |
723 | { | |
724 | compile_grep_patterns_real(opt); | |
725 | if (opt->debug) | |
726 | dump_grep_expression(opt); | |
727 | } | |
728 | ||
b48fb5b6 JH |
729 | static void free_pattern_expr(struct grep_expr *x) |
730 | { | |
731 | switch (x->node) { | |
5aaeb733 | 732 | case GREP_NODE_TRUE: |
b48fb5b6 JH |
733 | case GREP_NODE_ATOM: |
734 | break; | |
735 | case GREP_NODE_NOT: | |
736 | free_pattern_expr(x->u.unary); | |
737 | break; | |
738 | case GREP_NODE_AND: | |
739 | case GREP_NODE_OR: | |
740 | free_pattern_expr(x->u.binary.left); | |
741 | free_pattern_expr(x->u.binary.right); | |
742 | break; | |
743 | } | |
744 | free(x); | |
745 | } | |
746 | ||
747 | void free_grep_patterns(struct grep_opt *opt) | |
748 | { | |
749 | struct grep_pat *p, *n; | |
750 | ||
751 | for (p = opt->pattern_list; p; p = n) { | |
752 | n = p->next; | |
753 | switch (p->token) { | |
754 | case GREP_PATTERN: /* atom */ | |
755 | case GREP_PATTERN_HEAD: | |
756 | case GREP_PATTERN_BODY: | |
9eceddee FK |
757 | if (p->kws) |
758 | kwsfree(p->kws); | |
759 | else if (p->pcre_regexp) | |
63e7e9d8 MK |
760 | free_pcre_regexp(p); |
761 | else | |
762 | regfree(&p->regexp); | |
526a858a | 763 | free(p->pattern); |
b48fb5b6 JH |
764 | break; |
765 | default: | |
766 | break; | |
767 | } | |
768 | free(p); | |
769 | } | |
770 | ||
771 | if (!opt->extended) | |
772 | return; | |
773 | free_pattern_expr(opt->pattern_expression); | |
774 | } | |
775 | ||
83b5d2f5 JH |
776 | static char *end_of_line(char *cp, unsigned long *left) |
777 | { | |
778 | unsigned long l = *left; | |
779 | while (l && *cp != '\n') { | |
780 | l--; | |
781 | cp++; | |
782 | } | |
783 | *left = l; | |
784 | return cp; | |
785 | } | |
786 | ||
787 | static int word_char(char ch) | |
788 | { | |
789 | return isalnum(ch) || ch == '_'; | |
790 | } | |
791 | ||
55f638bd ML |
792 | static void output_color(struct grep_opt *opt, const void *data, size_t size, |
793 | const char *color) | |
794 | { | |
daa0c3d9 | 795 | if (want_color(opt->color) && color && color[0]) { |
55f638bd ML |
796 | opt->output(opt, color, strlen(color)); |
797 | opt->output(opt, data, size); | |
798 | opt->output(opt, GIT_COLOR_RESET, strlen(GIT_COLOR_RESET)); | |
799 | } else | |
800 | opt->output(opt, data, size); | |
801 | } | |
802 | ||
803 | static void output_sep(struct grep_opt *opt, char sign) | |
804 | { | |
805 | if (opt->null_following_name) | |
806 | opt->output(opt, "\0", 1); | |
807 | else | |
808 | output_color(opt, &sign, 1, opt->color_sep); | |
809 | } | |
810 | ||
83caecca RZ |
811 | static void show_name(struct grep_opt *opt, const char *name) |
812 | { | |
55f638bd | 813 | output_color(opt, name, strlen(name), opt->color_filename); |
5b594f45 | 814 | opt->output(opt, opt->null_following_name ? "\0" : "\n", 1); |
83caecca RZ |
815 | } |
816 | ||
ed40a095 RS |
817 | static int fixmatch(struct grep_pat *p, char *line, char *eol, |
818 | regmatch_t *match) | |
83b5d2f5 | 819 | { |
9eceddee FK |
820 | struct kwsmatch kwsm; |
821 | size_t offset = kwsexec(p->kws, line, eol - line, &kwsm); | |
822 | if (offset == -1) { | |
83b5d2f5 JH |
823 | match->rm_so = match->rm_eo = -1; |
824 | return REG_NOMATCH; | |
9eceddee FK |
825 | } else { |
826 | match->rm_so = offset; | |
827 | match->rm_eo = match->rm_so + kwsm.size[0]; | |
83b5d2f5 JH |
828 | return 0; |
829 | } | |
830 | } | |
831 | ||
f96e5673 RS |
832 | static int regmatch(const regex_t *preg, char *line, char *eol, |
833 | regmatch_t *match, int eflags) | |
834 | { | |
835 | #ifdef REG_STARTEND | |
836 | match->rm_so = 0; | |
837 | match->rm_eo = eol - line; | |
838 | eflags |= REG_STARTEND; | |
839 | #endif | |
840 | return regexec(preg, line, 1, match, eflags); | |
841 | } | |
842 | ||
97e77784 MK |
843 | static int patmatch(struct grep_pat *p, char *line, char *eol, |
844 | regmatch_t *match, int eflags) | |
845 | { | |
846 | int hit; | |
847 | ||
848 | if (p->fixed) | |
849 | hit = !fixmatch(p, line, eol, match); | |
63e7e9d8 MK |
850 | else if (p->pcre_regexp) |
851 | hit = !pcrematch(p, line, eol, match, eflags); | |
97e77784 MK |
852 | else |
853 | hit = !regmatch(&p->regexp, line, eol, match, eflags); | |
854 | ||
855 | return hit; | |
856 | } | |
857 | ||
a4d7d2c6 JH |
858 | static int strip_timestamp(char *bol, char **eol_p) |
859 | { | |
860 | char *eol = *eol_p; | |
861 | int ch; | |
862 | ||
863 | while (bol < --eol) { | |
864 | if (*eol != '>') | |
865 | continue; | |
866 | *eol_p = ++eol; | |
867 | ch = *eol; | |
868 | *eol = '\0'; | |
869 | return ch; | |
870 | } | |
871 | return 0; | |
872 | } | |
873 | ||
874 | static struct { | |
875 | const char *field; | |
876 | size_t len; | |
877 | } header_field[] = { | |
878 | { "author ", 7 }, | |
879 | { "committer ", 10 }, | |
72fd13f7 | 880 | { "reflog ", 7 }, |
a4d7d2c6 JH |
881 | }; |
882 | ||
d7eb527d | 883 | static int match_one_pattern(struct grep_pat *p, char *bol, char *eol, |
79212772 RS |
884 | enum grep_context ctx, |
885 | regmatch_t *pmatch, int eflags) | |
83b5d2f5 JH |
886 | { |
887 | int hit = 0; | |
a4d7d2c6 | 888 | int saved_ch = 0; |
e701fadb | 889 | const char *start = bol; |
83b5d2f5 | 890 | |
480c1ca6 JH |
891 | if ((p->token != GREP_PATTERN) && |
892 | ((p->token == GREP_PATTERN_HEAD) != (ctx == GREP_CONTEXT_HEAD))) | |
893 | return 0; | |
894 | ||
a4d7d2c6 JH |
895 | if (p->token == GREP_PATTERN_HEAD) { |
896 | const char *field; | |
897 | size_t len; | |
898 | assert(p->field < ARRAY_SIZE(header_field)); | |
899 | field = header_field[p->field].field; | |
900 | len = header_field[p->field].len; | |
901 | if (strncmp(bol, field, len)) | |
902 | return 0; | |
903 | bol += len; | |
ad4813b3 NTND |
904 | switch (p->field) { |
905 | case GREP_HEADER_AUTHOR: | |
906 | case GREP_HEADER_COMMITTER: | |
907 | saved_ch = strip_timestamp(bol, &eol); | |
908 | break; | |
909 | default: | |
910 | break; | |
911 | } | |
a4d7d2c6 JH |
912 | } |
913 | ||
83b5d2f5 | 914 | again: |
97e77784 | 915 | hit = patmatch(p, bol, eol, pmatch, eflags); |
83b5d2f5 | 916 | |
d7eb527d | 917 | if (hit && p->word_regexp) { |
83b5d2f5 | 918 | if ((pmatch[0].rm_so < 0) || |
84201eae | 919 | (eol - bol) < pmatch[0].rm_so || |
83b5d2f5 JH |
920 | (pmatch[0].rm_eo < 0) || |
921 | (eol - bol) < pmatch[0].rm_eo) | |
922 | die("regexp returned nonsense"); | |
923 | ||
924 | /* Match beginning must be either beginning of the | |
925 | * line, or at word boundary (i.e. the last char must | |
926 | * not be a word char). Similarly, match end must be | |
927 | * either end of the line, or at word boundary | |
928 | * (i.e. the next char must not be a word char). | |
929 | */ | |
fb62eb7f | 930 | if ( ((pmatch[0].rm_so == 0) || |
83b5d2f5 JH |
931 | !word_char(bol[pmatch[0].rm_so-1])) && |
932 | ((pmatch[0].rm_eo == (eol-bol)) || | |
933 | !word_char(bol[pmatch[0].rm_eo])) ) | |
934 | ; | |
935 | else | |
936 | hit = 0; | |
937 | ||
84201eae RS |
938 | /* Words consist of at least one character. */ |
939 | if (pmatch->rm_so == pmatch->rm_eo) | |
940 | hit = 0; | |
941 | ||
83b5d2f5 JH |
942 | if (!hit && pmatch[0].rm_so + bol + 1 < eol) { |
943 | /* There could be more than one match on the | |
944 | * line, and the first match might not be | |
945 | * strict word match. But later ones could be! | |
fb62eb7f RS |
946 | * Forward to the next possible start, i.e. the |
947 | * next position following a non-word char. | |
83b5d2f5 JH |
948 | */ |
949 | bol = pmatch[0].rm_so + bol + 1; | |
fb62eb7f RS |
950 | while (word_char(bol[-1]) && bol < eol) |
951 | bol++; | |
dbb6a4ad | 952 | eflags |= REG_NOTBOL; |
fb62eb7f RS |
953 | if (bol < eol) |
954 | goto again; | |
83b5d2f5 JH |
955 | } |
956 | } | |
a4d7d2c6 JH |
957 | if (p->token == GREP_PATTERN_HEAD && saved_ch) |
958 | *eol = saved_ch; | |
e701fadb RS |
959 | if (hit) { |
960 | pmatch[0].rm_so += bol - start; | |
961 | pmatch[0].rm_eo += bol - start; | |
962 | } | |
83b5d2f5 JH |
963 | return hit; |
964 | } | |
965 | ||
d7eb527d RS |
966 | static int match_expr_eval(struct grep_expr *x, char *bol, char *eol, |
967 | enum grep_context ctx, int collect_hits) | |
83b5d2f5 | 968 | { |
0ab7befa | 969 | int h = 0; |
79212772 | 970 | regmatch_t match; |
0ab7befa | 971 | |
c922b01f LT |
972 | if (!x) |
973 | die("Not a valid grep expression"); | |
83b5d2f5 | 974 | switch (x->node) { |
5aaeb733 JH |
975 | case GREP_NODE_TRUE: |
976 | h = 1; | |
977 | break; | |
83b5d2f5 | 978 | case GREP_NODE_ATOM: |
79212772 | 979 | h = match_one_pattern(x->u.atom, bol, eol, ctx, &match, 0); |
83b5d2f5 JH |
980 | break; |
981 | case GREP_NODE_NOT: | |
d7eb527d | 982 | h = !match_expr_eval(x->u.unary, bol, eol, ctx, 0); |
0ab7befa | 983 | break; |
83b5d2f5 | 984 | case GREP_NODE_AND: |
d7eb527d | 985 | if (!match_expr_eval(x->u.binary.left, bol, eol, ctx, 0)) |
252d560d | 986 | return 0; |
d7eb527d | 987 | h = match_expr_eval(x->u.binary.right, bol, eol, ctx, 0); |
0ab7befa | 988 | break; |
83b5d2f5 | 989 | case GREP_NODE_OR: |
0ab7befa | 990 | if (!collect_hits) |
d7eb527d | 991 | return (match_expr_eval(x->u.binary.left, |
0ab7befa | 992 | bol, eol, ctx, 0) || |
d7eb527d | 993 | match_expr_eval(x->u.binary.right, |
0ab7befa | 994 | bol, eol, ctx, 0)); |
d7eb527d | 995 | h = match_expr_eval(x->u.binary.left, bol, eol, ctx, 0); |
0ab7befa | 996 | x->u.binary.left->hit |= h; |
d7eb527d | 997 | h |= match_expr_eval(x->u.binary.right, bol, eol, ctx, 1); |
0ab7befa JH |
998 | break; |
999 | default: | |
d7530708 | 1000 | die("Unexpected node type (internal error) %d", x->node); |
83b5d2f5 | 1001 | } |
0ab7befa JH |
1002 | if (collect_hits) |
1003 | x->hit |= h; | |
1004 | return h; | |
83b5d2f5 JH |
1005 | } |
1006 | ||
480c1ca6 | 1007 | static int match_expr(struct grep_opt *opt, char *bol, char *eol, |
0ab7befa | 1008 | enum grep_context ctx, int collect_hits) |
83b5d2f5 JH |
1009 | { |
1010 | struct grep_expr *x = opt->pattern_expression; | |
d7eb527d | 1011 | return match_expr_eval(x, bol, eol, ctx, collect_hits); |
83b5d2f5 JH |
1012 | } |
1013 | ||
480c1ca6 | 1014 | static int match_line(struct grep_opt *opt, char *bol, char *eol, |
0ab7befa | 1015 | enum grep_context ctx, int collect_hits) |
83b5d2f5 JH |
1016 | { |
1017 | struct grep_pat *p; | |
79212772 RS |
1018 | regmatch_t match; |
1019 | ||
83b5d2f5 | 1020 | if (opt->extended) |
0ab7befa JH |
1021 | return match_expr(opt, bol, eol, ctx, collect_hits); |
1022 | ||
1023 | /* we do not call with collect_hits without being extended */ | |
83b5d2f5 | 1024 | for (p = opt->pattern_list; p; p = p->next) { |
79212772 | 1025 | if (match_one_pattern(p, bol, eol, ctx, &match, 0)) |
83b5d2f5 JH |
1026 | return 1; |
1027 | } | |
1028 | return 0; | |
1029 | } | |
1030 | ||
7e8f59d5 RS |
1031 | static int match_next_pattern(struct grep_pat *p, char *bol, char *eol, |
1032 | enum grep_context ctx, | |
1033 | regmatch_t *pmatch, int eflags) | |
1034 | { | |
1035 | regmatch_t match; | |
1036 | ||
1037 | if (!match_one_pattern(p, bol, eol, ctx, &match, eflags)) | |
1038 | return 0; | |
1039 | if (match.rm_so < 0 || match.rm_eo < 0) | |
1040 | return 0; | |
1041 | if (pmatch->rm_so >= 0 && pmatch->rm_eo >= 0) { | |
1042 | if (match.rm_so > pmatch->rm_so) | |
1043 | return 1; | |
1044 | if (match.rm_so == pmatch->rm_so && match.rm_eo < pmatch->rm_eo) | |
1045 | return 1; | |
1046 | } | |
1047 | pmatch->rm_so = match.rm_so; | |
1048 | pmatch->rm_eo = match.rm_eo; | |
1049 | return 1; | |
1050 | } | |
1051 | ||
1052 | static int next_match(struct grep_opt *opt, char *bol, char *eol, | |
1053 | enum grep_context ctx, regmatch_t *pmatch, int eflags) | |
1054 | { | |
1055 | struct grep_pat *p; | |
1056 | int hit = 0; | |
1057 | ||
1058 | pmatch->rm_so = pmatch->rm_eo = -1; | |
1059 | if (bol < eol) { | |
1060 | for (p = opt->pattern_list; p; p = p->next) { | |
1061 | switch (p->token) { | |
1062 | case GREP_PATTERN: /* atom */ | |
1063 | case GREP_PATTERN_HEAD: | |
1064 | case GREP_PATTERN_BODY: | |
1065 | hit |= match_next_pattern(p, bol, eol, ctx, | |
1066 | pmatch, eflags); | |
1067 | break; | |
1068 | default: | |
1069 | break; | |
1070 | } | |
1071 | } | |
1072 | } | |
1073 | return hit; | |
1074 | } | |
1075 | ||
1076 | static void show_line(struct grep_opt *opt, char *bol, char *eol, | |
1077 | const char *name, unsigned lno, char sign) | |
1078 | { | |
1079 | int rest = eol - bol; | |
00588bb5 | 1080 | char *line_color = NULL; |
7e8f59d5 | 1081 | |
a8f0e764 RS |
1082 | if (opt->file_break && opt->last_shown == 0) { |
1083 | if (opt->show_hunk_mark) | |
1084 | opt->output(opt, "\n", 1); | |
ba8ea749 | 1085 | } else if (opt->pre_context || opt->post_context || opt->funcbody) { |
046802d0 | 1086 | if (opt->last_shown == 0) { |
55f638bd ML |
1087 | if (opt->show_hunk_mark) { |
1088 | output_color(opt, "--", 2, opt->color_sep); | |
1089 | opt->output(opt, "\n", 1); | |
07b838f0 | 1090 | } |
55f638bd ML |
1091 | } else if (lno > opt->last_shown + 1) { |
1092 | output_color(opt, "--", 2, opt->color_sep); | |
1093 | opt->output(opt, "\n", 1); | |
1094 | } | |
5dd06d38 | 1095 | } |
1d84f72e RS |
1096 | if (opt->heading && opt->last_shown == 0) { |
1097 | output_color(opt, name, strlen(name), opt->color_filename); | |
1098 | opt->output(opt, "\n", 1); | |
1099 | } | |
5dd06d38 RS |
1100 | opt->last_shown = lno; |
1101 | ||
1d84f72e | 1102 | if (!opt->heading && opt->pathname) { |
55f638bd ML |
1103 | output_color(opt, name, strlen(name), opt->color_filename); |
1104 | output_sep(opt, sign); | |
5b594f45 FK |
1105 | } |
1106 | if (opt->linenum) { | |
1107 | char buf[32]; | |
1108 | snprintf(buf, sizeof(buf), "%d", lno); | |
55f638bd ML |
1109 | output_color(opt, buf, strlen(buf), opt->color_lineno); |
1110 | output_sep(opt, sign); | |
5b594f45 | 1111 | } |
7e8f59d5 RS |
1112 | if (opt->color) { |
1113 | regmatch_t match; | |
1114 | enum grep_context ctx = GREP_CONTEXT_BODY; | |
1115 | int ch = *eol; | |
1116 | int eflags = 0; | |
1117 | ||
00588bb5 ML |
1118 | if (sign == ':') |
1119 | line_color = opt->color_selected; | |
1120 | else if (sign == '-') | |
1121 | line_color = opt->color_context; | |
1122 | else if (sign == '=') | |
1123 | line_color = opt->color_function; | |
7e8f59d5 RS |
1124 | *eol = '\0'; |
1125 | while (next_match(opt, bol, eol, ctx, &match, eflags)) { | |
1f5b9cc4 RS |
1126 | if (match.rm_so == match.rm_eo) |
1127 | break; | |
5b594f45 | 1128 | |
00588bb5 | 1129 | output_color(opt, bol, match.rm_so, line_color); |
55f638bd ML |
1130 | output_color(opt, bol + match.rm_so, |
1131 | match.rm_eo - match.rm_so, | |
1132 | opt->color_match); | |
7e8f59d5 RS |
1133 | bol += match.rm_eo; |
1134 | rest -= match.rm_eo; | |
1135 | eflags = REG_NOTBOL; | |
1136 | } | |
1137 | *eol = ch; | |
1138 | } | |
00588bb5 | 1139 | output_color(opt, bol, rest, line_color); |
5b594f45 | 1140 | opt->output(opt, "\n", 1); |
7e8f59d5 RS |
1141 | } |
1142 | ||
0579f91d | 1143 | #ifndef NO_PTHREADS |
78db6ea9 JK |
1144 | int grep_use_locks; |
1145 | ||
0579f91d TR |
1146 | /* |
1147 | * This lock protects access to the gitattributes machinery, which is | |
1148 | * not thread-safe. | |
1149 | */ | |
1150 | pthread_mutex_t grep_attr_mutex; | |
1151 | ||
78db6ea9 | 1152 | static inline void grep_attr_lock(void) |
0579f91d | 1153 | { |
78db6ea9 | 1154 | if (grep_use_locks) |
0579f91d TR |
1155 | pthread_mutex_lock(&grep_attr_mutex); |
1156 | } | |
1157 | ||
78db6ea9 | 1158 | static inline void grep_attr_unlock(void) |
0579f91d | 1159 | { |
78db6ea9 | 1160 | if (grep_use_locks) |
0579f91d TR |
1161 | pthread_mutex_unlock(&grep_attr_mutex); |
1162 | } | |
b3aeb285 JK |
1163 | |
1164 | /* | |
1165 | * Same as git_attr_mutex, but protecting the thread-unsafe object db access. | |
1166 | */ | |
1167 | pthread_mutex_t grep_read_mutex; | |
1168 | ||
0579f91d | 1169 | #else |
78db6ea9 JK |
1170 | #define grep_attr_lock() |
1171 | #define grep_attr_unlock() | |
0579f91d TR |
1172 | #endif |
1173 | ||
e1327023 | 1174 | static int match_funcname(struct grep_opt *opt, struct grep_source *gs, char *bol, char *eol) |
2944e4e6 | 1175 | { |
60ecac98 | 1176 | xdemitconf_t *xecfg = opt->priv; |
0579f91d | 1177 | if (xecfg && !xecfg->find_func) { |
94ad9d9e JK |
1178 | grep_source_load_driver(gs); |
1179 | if (gs->driver->funcname.pattern) { | |
1180 | const struct userdiff_funcname *pe = &gs->driver->funcname; | |
0579f91d TR |
1181 | xdiff_set_find_func(xecfg, pe->pattern, pe->cflags); |
1182 | } else { | |
1183 | xecfg = opt->priv = NULL; | |
1184 | } | |
1185 | } | |
1186 | ||
1187 | if (xecfg) { | |
60ecac98 RS |
1188 | char buf[1]; |
1189 | return xecfg->find_func(bol, eol - bol, buf, 1, | |
1190 | xecfg->find_func_priv) >= 0; | |
1191 | } | |
1192 | ||
2944e4e6 RS |
1193 | if (bol == eol) |
1194 | return 0; | |
1195 | if (isalpha(*bol) || *bol == '_' || *bol == '$') | |
1196 | return 1; | |
1197 | return 0; | |
1198 | } | |
1199 | ||
e1327023 JK |
1200 | static void show_funcname_line(struct grep_opt *opt, struct grep_source *gs, |
1201 | char *bol, unsigned lno) | |
2944e4e6 | 1202 | { |
e1327023 | 1203 | while (bol > gs->buf) { |
2944e4e6 RS |
1204 | char *eol = --bol; |
1205 | ||
e1327023 | 1206 | while (bol > gs->buf && bol[-1] != '\n') |
2944e4e6 RS |
1207 | bol--; |
1208 | lno--; | |
1209 | ||
1210 | if (lno <= opt->last_shown) | |
1211 | break; | |
1212 | ||
e1327023 JK |
1213 | if (match_funcname(opt, gs, bol, eol)) { |
1214 | show_line(opt, bol, eol, gs->name, lno, '='); | |
2944e4e6 RS |
1215 | break; |
1216 | } | |
1217 | } | |
1218 | } | |
1219 | ||
e1327023 | 1220 | static void show_pre_context(struct grep_opt *opt, struct grep_source *gs, |
ba8ea749 | 1221 | char *bol, char *end, unsigned lno) |
49de3216 | 1222 | { |
2944e4e6 | 1223 | unsigned cur = lno, from = 1, funcname_lno = 0; |
ba8ea749 RS |
1224 | int funcname_needed = !!opt->funcname; |
1225 | ||
e1327023 | 1226 | if (opt->funcbody && !match_funcname(opt, gs, bol, end)) |
ba8ea749 | 1227 | funcname_needed = 2; |
49de3216 RS |
1228 | |
1229 | if (opt->pre_context < lno) | |
1230 | from = lno - opt->pre_context; | |
1231 | if (from <= opt->last_shown) | |
1232 | from = opt->last_shown + 1; | |
1233 | ||
1234 | /* Rewind. */ | |
e1327023 | 1235 | while (bol > gs->buf && |
ba8ea749 | 1236 | cur > (funcname_needed == 2 ? opt->last_shown + 1 : from)) { |
2944e4e6 RS |
1237 | char *eol = --bol; |
1238 | ||
e1327023 | 1239 | while (bol > gs->buf && bol[-1] != '\n') |
49de3216 RS |
1240 | bol--; |
1241 | cur--; | |
e1327023 | 1242 | if (funcname_needed && match_funcname(opt, gs, bol, eol)) { |
2944e4e6 RS |
1243 | funcname_lno = cur; |
1244 | funcname_needed = 0; | |
1245 | } | |
49de3216 RS |
1246 | } |
1247 | ||
2944e4e6 RS |
1248 | /* We need to look even further back to find a function signature. */ |
1249 | if (opt->funcname && funcname_needed) | |
e1327023 | 1250 | show_funcname_line(opt, gs, bol, cur); |
2944e4e6 | 1251 | |
49de3216 RS |
1252 | /* Back forward. */ |
1253 | while (cur < lno) { | |
2944e4e6 | 1254 | char *eol = bol, sign = (cur == funcname_lno) ? '=' : '-'; |
49de3216 RS |
1255 | |
1256 | while (*eol != '\n') | |
1257 | eol++; | |
e1327023 | 1258 | show_line(opt, bol, eol, gs->name, cur, sign); |
49de3216 RS |
1259 | bol = eol + 1; |
1260 | cur++; | |
1261 | } | |
1262 | } | |
1263 | ||
a26345b6 JH |
1264 | static int should_lookahead(struct grep_opt *opt) |
1265 | { | |
1266 | struct grep_pat *p; | |
1267 | ||
1268 | if (opt->extended) | |
1269 | return 0; /* punt for too complex stuff */ | |
1270 | if (opt->invert) | |
1271 | return 0; | |
1272 | for (p = opt->pattern_list; p; p = p->next) { | |
1273 | if (p->token != GREP_PATTERN) | |
1274 | return 0; /* punt for "header only" and stuff */ | |
1275 | } | |
1276 | return 1; | |
1277 | } | |
1278 | ||
1279 | static int look_ahead(struct grep_opt *opt, | |
1280 | unsigned long *left_p, | |
1281 | unsigned *lno_p, | |
1282 | char **bol_p) | |
1283 | { | |
1284 | unsigned lno = *lno_p; | |
1285 | char *bol = *bol_p; | |
1286 | struct grep_pat *p; | |
1287 | char *sp, *last_bol; | |
1288 | regoff_t earliest = -1; | |
1289 | ||
1290 | for (p = opt->pattern_list; p; p = p->next) { | |
1291 | int hit; | |
1292 | regmatch_t m; | |
1293 | ||
97e77784 | 1294 | hit = patmatch(p, bol, bol + *left_p, &m, 0); |
a26345b6 JH |
1295 | if (!hit || m.rm_so < 0 || m.rm_eo < 0) |
1296 | continue; | |
1297 | if (earliest < 0 || m.rm_so < earliest) | |
1298 | earliest = m.rm_so; | |
1299 | } | |
1300 | ||
1301 | if (earliest < 0) { | |
1302 | *bol_p = bol + *left_p; | |
1303 | *left_p = 0; | |
1304 | return 1; | |
1305 | } | |
1306 | for (sp = bol + earliest; bol < sp && sp[-1] != '\n'; sp--) | |
1307 | ; /* find the beginning of the line */ | |
1308 | last_bol = sp; | |
1309 | ||
1310 | for (sp = bol; sp < last_bol; sp++) { | |
1311 | if (*sp == '\n') | |
1312 | lno++; | |
1313 | } | |
1314 | *left_p -= last_bol - bol; | |
1315 | *bol_p = last_bol; | |
1316 | *lno_p = lno; | |
1317 | return 0; | |
1318 | } | |
1319 | ||
5b594f45 FK |
1320 | static void std_output(struct grep_opt *opt, const void *buf, size_t size) |
1321 | { | |
1322 | fwrite(buf, size, 1, stdout); | |
1323 | } | |
1324 | ||
e1327023 | 1325 | static int grep_source_1(struct grep_opt *opt, struct grep_source *gs, int collect_hits) |
83b5d2f5 | 1326 | { |
e1327023 JK |
1327 | char *bol; |
1328 | unsigned long left; | |
83b5d2f5 | 1329 | unsigned lno = 1; |
83b5d2f5 | 1330 | unsigned last_hit = 0; |
83b5d2f5 | 1331 | int binary_match_only = 0; |
83b5d2f5 | 1332 | unsigned count = 0; |
a26345b6 | 1333 | int try_lookahead = 0; |
ba8ea749 | 1334 | int show_function = 0; |
480c1ca6 | 1335 | enum grep_context ctx = GREP_CONTEXT_HEAD; |
60ecac98 | 1336 | xdemitconf_t xecfg; |
83b5d2f5 | 1337 | |
5b594f45 FK |
1338 | if (!opt->output) |
1339 | opt->output = std_output; | |
1340 | ||
ba8ea749 RS |
1341 | if (opt->pre_context || opt->post_context || opt->file_break || |
1342 | opt->funcbody) { | |
08303c36 RS |
1343 | /* Show hunk marks, except for the first file. */ |
1344 | if (opt->last_shown) | |
1345 | opt->show_hunk_mark = 1; | |
1346 | /* | |
1347 | * If we're using threads then we can't easily identify | |
1348 | * the first file. Always put hunk marks in that case | |
1349 | * and skip the very first one later in work_done(). | |
1350 | */ | |
1351 | if (opt->output != std_output) | |
1352 | opt->show_hunk_mark = 1; | |
1353 | } | |
431d6e7b RS |
1354 | opt->last_shown = 0; |
1355 | ||
64fcec78 RS |
1356 | switch (opt->binary) { |
1357 | case GREP_BINARY_DEFAULT: | |
41b59bfc | 1358 | if (grep_source_is_binary(gs)) |
83b5d2f5 | 1359 | binary_match_only = 1; |
64fcec78 RS |
1360 | break; |
1361 | case GREP_BINARY_NOMATCH: | |
41b59bfc | 1362 | if (grep_source_is_binary(gs)) |
83b5d2f5 | 1363 | return 0; /* Assume unmatch */ |
64fcec78 RS |
1364 | break; |
1365 | case GREP_BINARY_TEXT: | |
1366 | break; | |
1367 | default: | |
1368 | die("bug: unknown binary handling mode"); | |
83b5d2f5 JH |
1369 | } |
1370 | ||
60ecac98 | 1371 | memset(&xecfg, 0, sizeof(xecfg)); |
0579f91d TR |
1372 | opt->priv = &xecfg; |
1373 | ||
a26345b6 | 1374 | try_lookahead = should_lookahead(opt); |
60ecac98 | 1375 | |
08265798 JK |
1376 | if (grep_source_load(gs) < 0) |
1377 | return 0; | |
1378 | ||
e1327023 JK |
1379 | bol = gs->buf; |
1380 | left = gs->size; | |
83b5d2f5 JH |
1381 | while (left) { |
1382 | char *eol, ch; | |
0ab7befa | 1383 | int hit; |
83b5d2f5 | 1384 | |
a26345b6 | 1385 | /* |
8997da38 | 1386 | * look_ahead() skips quickly to the line that possibly |
a26345b6 JH |
1387 | * has the next hit; don't call it if we need to do |
1388 | * something more than just skipping the current line | |
1389 | * in response to an unmatch for the current line. E.g. | |
1390 | * inside a post-context window, we will show the current | |
1391 | * line as a context around the previous hit when it | |
1392 | * doesn't hit. | |
1393 | */ | |
1394 | if (try_lookahead | |
1395 | && !(last_hit | |
ba8ea749 RS |
1396 | && (show_function || |
1397 | lno <= last_hit + opt->post_context)) | |
a26345b6 JH |
1398 | && look_ahead(opt, &left, &lno, &bol)) |
1399 | break; | |
83b5d2f5 JH |
1400 | eol = end_of_line(bol, &left); |
1401 | ch = *eol; | |
1402 | *eol = 0; | |
1403 | ||
480c1ca6 JH |
1404 | if ((ctx == GREP_CONTEXT_HEAD) && (eol == bol)) |
1405 | ctx = GREP_CONTEXT_BODY; | |
1406 | ||
0ab7befa | 1407 | hit = match_line(opt, bol, eol, ctx, collect_hits); |
83b5d2f5 JH |
1408 | *eol = ch; |
1409 | ||
0ab7befa JH |
1410 | if (collect_hits) |
1411 | goto next_line; | |
1412 | ||
83b5d2f5 JH |
1413 | /* "grep -v -e foo -e bla" should list lines |
1414 | * that do not have either, so inversion should | |
1415 | * be done outside. | |
1416 | */ | |
1417 | if (opt->invert) | |
1418 | hit = !hit; | |
1419 | if (opt->unmatch_name_only) { | |
1420 | if (hit) | |
1421 | return 0; | |
1422 | goto next_line; | |
1423 | } | |
1424 | if (hit) { | |
1425 | count++; | |
1426 | if (opt->status_only) | |
1427 | return 1; | |
321ffcc0 | 1428 | if (opt->name_only) { |
e1327023 | 1429 | show_name(opt, gs->name); |
321ffcc0 RS |
1430 | return 1; |
1431 | } | |
c30c10cf RS |
1432 | if (opt->count) |
1433 | goto next_line; | |
83b5d2f5 | 1434 | if (binary_match_only) { |
5b594f45 | 1435 | opt->output(opt, "Binary file ", 12); |
e1327023 | 1436 | output_color(opt, gs->name, strlen(gs->name), |
55f638bd | 1437 | opt->color_filename); |
5b594f45 | 1438 | opt->output(opt, " matches\n", 9); |
83b5d2f5 JH |
1439 | return 1; |
1440 | } | |
83b5d2f5 JH |
1441 | /* Hit at this line. If we haven't shown the |
1442 | * pre-context lines, we would need to show them. | |
83b5d2f5 | 1443 | */ |
ba8ea749 | 1444 | if (opt->pre_context || opt->funcbody) |
e1327023 | 1445 | show_pre_context(opt, gs, bol, eol, lno); |
2944e4e6 | 1446 | else if (opt->funcname) |
e1327023 JK |
1447 | show_funcname_line(opt, gs, bol, lno); |
1448 | show_line(opt, bol, eol, gs->name, lno, ':'); | |
5dd06d38 | 1449 | last_hit = lno; |
ba8ea749 RS |
1450 | if (opt->funcbody) |
1451 | show_function = 1; | |
1452 | goto next_line; | |
83b5d2f5 | 1453 | } |
e1327023 | 1454 | if (show_function && match_funcname(opt, gs, bol, eol)) |
ba8ea749 RS |
1455 | show_function = 0; |
1456 | if (show_function || | |
1457 | (last_hit && lno <= last_hit + opt->post_context)) { | |
83b5d2f5 JH |
1458 | /* If the last hit is within the post context, |
1459 | * we need to show this line. | |
1460 | */ | |
e1327023 | 1461 | show_line(opt, bol, eol, gs->name, lno, '-'); |
83b5d2f5 | 1462 | } |
83b5d2f5 JH |
1463 | |
1464 | next_line: | |
1465 | bol = eol + 1; | |
1466 | if (!left) | |
1467 | break; | |
1468 | left--; | |
1469 | lno++; | |
1470 | } | |
1471 | ||
0ab7befa JH |
1472 | if (collect_hits) |
1473 | return 0; | |
b48fb5b6 | 1474 | |
83b5d2f5 JH |
1475 | if (opt->status_only) |
1476 | return 0; | |
1477 | if (opt->unmatch_name_only) { | |
1478 | /* We did not see any hit, so we want to show this */ | |
e1327023 | 1479 | show_name(opt, gs->name); |
83b5d2f5 JH |
1480 | return 1; |
1481 | } | |
1482 | ||
60ecac98 RS |
1483 | xdiff_clear_find_func(&xecfg); |
1484 | opt->priv = NULL; | |
1485 | ||
83b5d2f5 JH |
1486 | /* NEEDSWORK: |
1487 | * The real "grep -c foo *.c" gives many "bar.c:0" lines, | |
1488 | * which feels mostly useless but sometimes useful. Maybe | |
1489 | * make it another option? For now suppress them. | |
1490 | */ | |
5b594f45 FK |
1491 | if (opt->count && count) { |
1492 | char buf[32]; | |
e1327023 | 1493 | output_color(opt, gs->name, strlen(gs->name), opt->color_filename); |
55f638bd ML |
1494 | output_sep(opt, ':'); |
1495 | snprintf(buf, sizeof(buf), "%u\n", count); | |
5b594f45 | 1496 | opt->output(opt, buf, strlen(buf)); |
c30c10cf | 1497 | return 1; |
5b594f45 | 1498 | } |
83b5d2f5 JH |
1499 | return !!last_hit; |
1500 | } | |
1501 | ||
0ab7befa JH |
1502 | static void clr_hit_marker(struct grep_expr *x) |
1503 | { | |
1504 | /* All-hit markers are meaningful only at the very top level | |
1505 | * OR node. | |
1506 | */ | |
1507 | while (1) { | |
1508 | x->hit = 0; | |
1509 | if (x->node != GREP_NODE_OR) | |
1510 | return; | |
1511 | x->u.binary.left->hit = 0; | |
1512 | x = x->u.binary.right; | |
1513 | } | |
1514 | } | |
1515 | ||
1516 | static int chk_hit_marker(struct grep_expr *x) | |
1517 | { | |
1518 | /* Top level nodes have hit markers. See if they all are hits */ | |
1519 | while (1) { | |
1520 | if (x->node != GREP_NODE_OR) | |
1521 | return x->hit; | |
1522 | if (!x->u.binary.left->hit) | |
1523 | return 0; | |
1524 | x = x->u.binary.right; | |
1525 | } | |
1526 | } | |
1527 | ||
e1327023 | 1528 | int grep_source(struct grep_opt *opt, struct grep_source *gs) |
0ab7befa JH |
1529 | { |
1530 | /* | |
1531 | * we do not have to do the two-pass grep when we do not check | |
1532 | * buffer-wide "all-match". | |
1533 | */ | |
1534 | if (!opt->all_match) | |
e1327023 | 1535 | return grep_source_1(opt, gs, 0); |
0ab7befa JH |
1536 | |
1537 | /* Otherwise the toplevel "or" terms hit a bit differently. | |
1538 | * We first clear hit markers from them. | |
1539 | */ | |
1540 | clr_hit_marker(opt->pattern_expression); | |
e1327023 | 1541 | grep_source_1(opt, gs, 1); |
0ab7befa JH |
1542 | |
1543 | if (!chk_hit_marker(opt->pattern_expression)) | |
1544 | return 0; | |
1545 | ||
e1327023 JK |
1546 | return grep_source_1(opt, gs, 0); |
1547 | } | |
1548 | ||
c876d6da | 1549 | int grep_buffer(struct grep_opt *opt, char *buf, unsigned long size) |
e1327023 JK |
1550 | { |
1551 | struct grep_source gs; | |
1552 | int r; | |
1553 | ||
55c61688 | 1554 | grep_source_init(&gs, GREP_SOURCE_BUF, NULL, NULL, NULL); |
e1327023 JK |
1555 | gs.buf = buf; |
1556 | gs.size = size; | |
1557 | ||
1558 | r = grep_source(opt, &gs); | |
1559 | ||
1560 | grep_source_clear(&gs); | |
1561 | return r; | |
1562 | } | |
1563 | ||
1564 | void grep_source_init(struct grep_source *gs, enum grep_source_type type, | |
55c61688 NTND |
1565 | const char *name, const char *path, |
1566 | const void *identifier) | |
e1327023 JK |
1567 | { |
1568 | gs->type = type; | |
1569 | gs->name = name ? xstrdup(name) : NULL; | |
55c61688 | 1570 | gs->path = path ? xstrdup(path) : NULL; |
e1327023 JK |
1571 | gs->buf = NULL; |
1572 | gs->size = 0; | |
94ad9d9e | 1573 | gs->driver = NULL; |
e1327023 JK |
1574 | |
1575 | switch (type) { | |
1576 | case GREP_SOURCE_FILE: | |
1577 | gs->identifier = xstrdup(identifier); | |
1578 | break; | |
1579 | case GREP_SOURCE_SHA1: | |
1580 | gs->identifier = xmalloc(20); | |
1581 | memcpy(gs->identifier, identifier, 20); | |
1582 | break; | |
1583 | case GREP_SOURCE_BUF: | |
1584 | gs->identifier = NULL; | |
1585 | } | |
1586 | } | |
1587 | ||
1588 | void grep_source_clear(struct grep_source *gs) | |
1589 | { | |
1590 | free(gs->name); | |
1591 | gs->name = NULL; | |
55c61688 NTND |
1592 | free(gs->path); |
1593 | gs->path = NULL; | |
e1327023 JK |
1594 | free(gs->identifier); |
1595 | gs->identifier = NULL; | |
1596 | grep_source_clear_data(gs); | |
1597 | } | |
1598 | ||
1599 | void grep_source_clear_data(struct grep_source *gs) | |
1600 | { | |
1601 | switch (gs->type) { | |
1602 | case GREP_SOURCE_FILE: | |
1603 | case GREP_SOURCE_SHA1: | |
1604 | free(gs->buf); | |
1605 | gs->buf = NULL; | |
1606 | gs->size = 0; | |
1607 | break; | |
1608 | case GREP_SOURCE_BUF: | |
1609 | /* leave user-provided buf intact */ | |
1610 | break; | |
1611 | } | |
1612 | } | |
1613 | ||
1614 | static int grep_source_load_sha1(struct grep_source *gs) | |
1615 | { | |
1616 | enum object_type type; | |
1617 | ||
1618 | grep_read_lock(); | |
1619 | gs->buf = read_sha1_file(gs->identifier, &type, &gs->size); | |
1620 | grep_read_unlock(); | |
1621 | ||
1622 | if (!gs->buf) | |
1623 | return error(_("'%s': unable to read %s"), | |
1624 | gs->name, | |
1625 | sha1_to_hex(gs->identifier)); | |
1626 | return 0; | |
1627 | } | |
1628 | ||
1629 | static int grep_source_load_file(struct grep_source *gs) | |
1630 | { | |
1631 | const char *filename = gs->identifier; | |
1632 | struct stat st; | |
1633 | char *data; | |
1634 | size_t size; | |
1635 | int i; | |
1636 | ||
1637 | if (lstat(filename, &st) < 0) { | |
1638 | err_ret: | |
1639 | if (errno != ENOENT) | |
1640 | error(_("'%s': %s"), filename, strerror(errno)); | |
1641 | return -1; | |
1642 | } | |
1643 | if (!S_ISREG(st.st_mode)) | |
1644 | return -1; | |
1645 | size = xsize_t(st.st_size); | |
1646 | i = open(filename, O_RDONLY); | |
1647 | if (i < 0) | |
1648 | goto err_ret; | |
1649 | data = xmalloc(size + 1); | |
1650 | if (st.st_size != read_in_full(i, data, size)) { | |
1651 | error(_("'%s': short read %s"), filename, strerror(errno)); | |
1652 | close(i); | |
1653 | free(data); | |
1654 | return -1; | |
1655 | } | |
1656 | close(i); | |
1657 | data[size] = 0; | |
1658 | ||
1659 | gs->buf = data; | |
1660 | gs->size = size; | |
1661 | return 0; | |
1662 | } | |
1663 | ||
3083301e | 1664 | static int grep_source_load(struct grep_source *gs) |
e1327023 JK |
1665 | { |
1666 | if (gs->buf) | |
1667 | return 0; | |
1668 | ||
1669 | switch (gs->type) { | |
1670 | case GREP_SOURCE_FILE: | |
1671 | return grep_source_load_file(gs); | |
1672 | case GREP_SOURCE_SHA1: | |
1673 | return grep_source_load_sha1(gs); | |
1674 | case GREP_SOURCE_BUF: | |
1675 | return gs->buf ? 0 : -1; | |
1676 | } | |
1677 | die("BUG: invalid grep_source type"); | |
0ab7befa | 1678 | } |
94ad9d9e JK |
1679 | |
1680 | void grep_source_load_driver(struct grep_source *gs) | |
1681 | { | |
1682 | if (gs->driver) | |
1683 | return; | |
1684 | ||
1685 | grep_attr_lock(); | |
55c61688 NTND |
1686 | if (gs->path) |
1687 | gs->driver = userdiff_find_by_path(gs->path); | |
94ad9d9e JK |
1688 | if (!gs->driver) |
1689 | gs->driver = userdiff_find_by_name("default"); | |
1690 | grep_attr_unlock(); | |
1691 | } | |
41b59bfc | 1692 | |
3083301e | 1693 | static int grep_source_is_binary(struct grep_source *gs) |
41b59bfc JK |
1694 | { |
1695 | grep_source_load_driver(gs); | |
1696 | if (gs->driver->binary != -1) | |
1697 | return gs->driver->binary; | |
1698 | ||
1699 | if (!grep_source_load(gs)) | |
1700 | return buffer_is_binary(gs->buf, gs->size); | |
1701 | ||
1702 | return 0; | |
1703 | } |