]>
Commit | Line | Data |
---|---|---|
83b5d2f5 | 1 | #include "cache.h" |
83b5d2f5 | 2 | #include "grep.h" |
60ecac98 | 3 | #include "userdiff.h" |
6bfce93e | 4 | #include "xdiff-interface.h" |
83b5d2f5 | 5 | |
fc456751 RS |
6 | static struct grep_pat *create_grep_pat(const char *pat, size_t patlen, |
7 | const char *origin, int no, | |
8 | enum grep_pat_token t, | |
9 | enum grep_header_field field) | |
a4d7d2c6 JH |
10 | { |
11 | struct grep_pat *p = xcalloc(1, sizeof(*p)); | |
526a858a | 12 | p->pattern = xmemdupz(pat, patlen); |
fc456751 RS |
13 | p->patternlen = patlen; |
14 | p->origin = origin; | |
15 | p->no = no; | |
16 | p->token = t; | |
a4d7d2c6 | 17 | p->field = field; |
fc456751 RS |
18 | return p; |
19 | } | |
20 | ||
2b3873ff RS |
21 | static void do_append_grep_pat(struct grep_pat ***tail, struct grep_pat *p) |
22 | { | |
23 | **tail = p; | |
24 | *tail = &p->next; | |
a4d7d2c6 | 25 | p->next = NULL; |
526a858a RS |
26 | |
27 | switch (p->token) { | |
28 | case GREP_PATTERN: /* atom */ | |
29 | case GREP_PATTERN_HEAD: | |
30 | case GREP_PATTERN_BODY: | |
31 | for (;;) { | |
32 | struct grep_pat *new_pat; | |
33 | size_t len = 0; | |
34 | char *cp = p->pattern + p->patternlen, *nl = NULL; | |
35 | while (++len <= p->patternlen) { | |
36 | if (*(--cp) == '\n') { | |
37 | nl = cp; | |
38 | break; | |
39 | } | |
40 | } | |
41 | if (!nl) | |
42 | break; | |
43 | new_pat = create_grep_pat(nl + 1, len - 1, p->origin, | |
44 | p->no, p->token, p->field); | |
45 | new_pat->next = p->next; | |
46 | if (!p->next) | |
47 | *tail = &new_pat->next; | |
48 | p->next = new_pat; | |
49 | *nl = '\0'; | |
50 | p->patternlen -= len; | |
51 | } | |
52 | break; | |
53 | default: | |
54 | break; | |
55 | } | |
2b3873ff RS |
56 | } |
57 | ||
fc456751 RS |
58 | void append_header_grep_pattern(struct grep_opt *opt, |
59 | enum grep_header_field field, const char *pat) | |
60 | { | |
61 | struct grep_pat *p = create_grep_pat(pat, strlen(pat), "header", 0, | |
62 | GREP_PATTERN_HEAD, field); | |
2b3873ff | 63 | do_append_grep_pat(&opt->header_tail, p); |
a4d7d2c6 JH |
64 | } |
65 | ||
83b5d2f5 JH |
66 | void append_grep_pattern(struct grep_opt *opt, const char *pat, |
67 | const char *origin, int no, enum grep_pat_token t) | |
ed40a095 RS |
68 | { |
69 | append_grep_pat(opt, pat, strlen(pat), origin, no, t); | |
70 | } | |
71 | ||
72 | void append_grep_pat(struct grep_opt *opt, const char *pat, size_t patlen, | |
73 | const char *origin, int no, enum grep_pat_token t) | |
83b5d2f5 | 74 | { |
fc456751 | 75 | struct grep_pat *p = create_grep_pat(pat, patlen, origin, no, t, 0); |
2b3873ff | 76 | do_append_grep_pat(&opt->pattern_tail, p); |
83b5d2f5 JH |
77 | } |
78 | ||
5b594f45 FK |
79 | struct grep_opt *grep_opt_dup(const struct grep_opt *opt) |
80 | { | |
81 | struct grep_pat *pat; | |
82 | struct grep_opt *ret = xmalloc(sizeof(struct grep_opt)); | |
83 | *ret = *opt; | |
84 | ||
85 | ret->pattern_list = NULL; | |
86 | ret->pattern_tail = &ret->pattern_list; | |
87 | ||
88 | for(pat = opt->pattern_list; pat != NULL; pat = pat->next) | |
89 | { | |
90 | if(pat->token == GREP_PATTERN_HEAD) | |
91 | append_header_grep_pattern(ret, pat->field, | |
92 | pat->pattern); | |
93 | else | |
ed40a095 RS |
94 | append_grep_pat(ret, pat->pattern, pat->patternlen, |
95 | pat->origin, pat->no, pat->token); | |
5b594f45 FK |
96 | } |
97 | ||
98 | return ret; | |
99 | } | |
100 | ||
a30c148a MK |
101 | static NORETURN void compile_regexp_failed(const struct grep_pat *p, |
102 | const char *error) | |
103 | { | |
104 | char where[1024]; | |
105 | ||
106 | if (p->no) | |
107 | sprintf(where, "In '%s' at %d, ", p->origin, p->no); | |
108 | else if (p->origin) | |
109 | sprintf(where, "%s, ", p->origin); | |
110 | else | |
111 | where[0] = 0; | |
112 | ||
113 | die("%s'%s': %s", where, p->pattern, error); | |
114 | } | |
115 | ||
63e7e9d8 MK |
116 | #ifdef USE_LIBPCRE |
117 | static void compile_pcre_regexp(struct grep_pat *p, const struct grep_opt *opt) | |
118 | { | |
119 | const char *error; | |
120 | int erroffset; | |
fba4f125 | 121 | int options = PCRE_MULTILINE; |
63e7e9d8 MK |
122 | |
123 | if (opt->ignore_case) | |
124 | options |= PCRE_CASELESS; | |
125 | ||
126 | p->pcre_regexp = pcre_compile(p->pattern, options, &error, &erroffset, | |
127 | NULL); | |
128 | if (!p->pcre_regexp) | |
129 | compile_regexp_failed(p, error); | |
130 | ||
131 | p->pcre_extra_info = pcre_study(p->pcre_regexp, 0, &error); | |
132 | if (!p->pcre_extra_info && error) | |
133 | die("%s", error); | |
134 | } | |
135 | ||
136 | static int pcrematch(struct grep_pat *p, const char *line, const char *eol, | |
137 | regmatch_t *match, int eflags) | |
138 | { | |
139 | int ovector[30], ret, flags = 0; | |
140 | ||
141 | if (eflags & REG_NOTBOL) | |
142 | flags |= PCRE_NOTBOL; | |
143 | ||
144 | ret = pcre_exec(p->pcre_regexp, p->pcre_extra_info, line, eol - line, | |
145 | 0, flags, ovector, ARRAY_SIZE(ovector)); | |
146 | if (ret < 0 && ret != PCRE_ERROR_NOMATCH) | |
147 | die("pcre_exec failed with error code %d", ret); | |
148 | if (ret > 0) { | |
149 | ret = 0; | |
150 | match->rm_so = ovector[0]; | |
151 | match->rm_eo = ovector[1]; | |
152 | } | |
153 | ||
154 | return ret; | |
155 | } | |
156 | ||
157 | static void free_pcre_regexp(struct grep_pat *p) | |
158 | { | |
159 | pcre_free(p->pcre_regexp); | |
160 | pcre_free(p->pcre_extra_info); | |
161 | } | |
162 | #else /* !USE_LIBPCRE */ | |
163 | static void compile_pcre_regexp(struct grep_pat *p, const struct grep_opt *opt) | |
164 | { | |
165 | die("cannot use Perl-compatible regexes when not compiled with USE_LIBPCRE"); | |
166 | } | |
167 | ||
168 | static int pcrematch(struct grep_pat *p, const char *line, const char *eol, | |
169 | regmatch_t *match, int eflags) | |
170 | { | |
171 | return 1; | |
172 | } | |
173 | ||
174 | static void free_pcre_regexp(struct grep_pat *p) | |
175 | { | |
176 | } | |
177 | #endif /* !USE_LIBPCRE */ | |
178 | ||
9eceddee FK |
179 | static int is_fixed(const char *s, size_t len) |
180 | { | |
181 | size_t i; | |
182 | ||
183 | /* regcomp cannot accept patterns with NULs so we | |
184 | * consider any pattern containing a NUL fixed. | |
185 | */ | |
186 | if (memchr(s, 0, len)) | |
187 | return 1; | |
188 | ||
189 | for (i = 0; i < len; i++) { | |
190 | if (is_regex_special(s[i])) | |
191 | return 0; | |
192 | } | |
193 | ||
194 | return 1; | |
195 | } | |
196 | ||
83b5d2f5 JH |
197 | static void compile_regexp(struct grep_pat *p, struct grep_opt *opt) |
198 | { | |
c822255c RS |
199 | int err; |
200 | ||
d7eb527d | 201 | p->word_regexp = opt->word_regexp; |
5183bf67 | 202 | p->ignore_case = opt->ignore_case; |
d7eb527d | 203 | |
9eceddee FK |
204 | if (opt->fixed || is_fixed(p->pattern, p->patternlen)) |
205 | p->fixed = 1; | |
206 | else | |
207 | p->fixed = 0; | |
208 | ||
209 | if (p->fixed) { | |
0f871cf5 JH |
210 | if (opt->regflags & REG_ICASE || p->ignore_case) |
211 | p->kws = kwsalloc(tolower_trans_tbl); | |
212 | else | |
9eceddee | 213 | p->kws = kwsalloc(NULL); |
9eceddee FK |
214 | kwsincr(p->kws, p->pattern, p->patternlen); |
215 | kwsprep(p->kws); | |
c822255c | 216 | return; |
9eceddee | 217 | } |
c822255c | 218 | |
63e7e9d8 MK |
219 | if (opt->pcre) { |
220 | compile_pcre_regexp(p, opt); | |
221 | return; | |
222 | } | |
223 | ||
c822255c | 224 | err = regcomp(&p->regexp, p->pattern, opt->regflags); |
83b5d2f5 JH |
225 | if (err) { |
226 | char errbuf[1024]; | |
83b5d2f5 JH |
227 | regerror(err, &p->regexp, errbuf, 1024); |
228 | regfree(&p->regexp); | |
a30c148a | 229 | compile_regexp_failed(p, errbuf); |
83b5d2f5 JH |
230 | } |
231 | } | |
232 | ||
0ab7befa | 233 | static struct grep_expr *compile_pattern_or(struct grep_pat **); |
83b5d2f5 JH |
234 | static struct grep_expr *compile_pattern_atom(struct grep_pat **list) |
235 | { | |
236 | struct grep_pat *p; | |
237 | struct grep_expr *x; | |
238 | ||
239 | p = *list; | |
c922b01f LT |
240 | if (!p) |
241 | return NULL; | |
83b5d2f5 JH |
242 | switch (p->token) { |
243 | case GREP_PATTERN: /* atom */ | |
480c1ca6 JH |
244 | case GREP_PATTERN_HEAD: |
245 | case GREP_PATTERN_BODY: | |
83b5d2f5 JH |
246 | x = xcalloc(1, sizeof (struct grep_expr)); |
247 | x->node = GREP_NODE_ATOM; | |
248 | x->u.atom = p; | |
249 | *list = p->next; | |
250 | return x; | |
251 | case GREP_OPEN_PAREN: | |
252 | *list = p->next; | |
0ab7befa | 253 | x = compile_pattern_or(list); |
83b5d2f5 JH |
254 | if (!*list || (*list)->token != GREP_CLOSE_PAREN) |
255 | die("unmatched parenthesis"); | |
256 | *list = (*list)->next; | |
257 | return x; | |
258 | default: | |
259 | return NULL; | |
260 | } | |
261 | } | |
262 | ||
263 | static struct grep_expr *compile_pattern_not(struct grep_pat **list) | |
264 | { | |
265 | struct grep_pat *p; | |
266 | struct grep_expr *x; | |
267 | ||
268 | p = *list; | |
c922b01f LT |
269 | if (!p) |
270 | return NULL; | |
83b5d2f5 JH |
271 | switch (p->token) { |
272 | case GREP_NOT: | |
273 | if (!p->next) | |
274 | die("--not not followed by pattern expression"); | |
275 | *list = p->next; | |
276 | x = xcalloc(1, sizeof (struct grep_expr)); | |
277 | x->node = GREP_NODE_NOT; | |
278 | x->u.unary = compile_pattern_not(list); | |
279 | if (!x->u.unary) | |
280 | die("--not followed by non pattern expression"); | |
281 | return x; | |
282 | default: | |
283 | return compile_pattern_atom(list); | |
284 | } | |
285 | } | |
286 | ||
287 | static struct grep_expr *compile_pattern_and(struct grep_pat **list) | |
288 | { | |
289 | struct grep_pat *p; | |
290 | struct grep_expr *x, *y, *z; | |
291 | ||
292 | x = compile_pattern_not(list); | |
293 | p = *list; | |
294 | if (p && p->token == GREP_AND) { | |
295 | if (!p->next) | |
296 | die("--and not followed by pattern expression"); | |
297 | *list = p->next; | |
298 | y = compile_pattern_and(list); | |
299 | if (!y) | |
300 | die("--and not followed by pattern expression"); | |
301 | z = xcalloc(1, sizeof (struct grep_expr)); | |
302 | z->node = GREP_NODE_AND; | |
303 | z->u.binary.left = x; | |
304 | z->u.binary.right = y; | |
305 | return z; | |
306 | } | |
307 | return x; | |
308 | } | |
309 | ||
310 | static struct grep_expr *compile_pattern_or(struct grep_pat **list) | |
311 | { | |
312 | struct grep_pat *p; | |
313 | struct grep_expr *x, *y, *z; | |
314 | ||
315 | x = compile_pattern_and(list); | |
316 | p = *list; | |
317 | if (x && p && p->token != GREP_CLOSE_PAREN) { | |
318 | y = compile_pattern_or(list); | |
319 | if (!y) | |
320 | die("not a pattern expression %s", p->pattern); | |
321 | z = xcalloc(1, sizeof (struct grep_expr)); | |
322 | z->node = GREP_NODE_OR; | |
323 | z->u.binary.left = x; | |
324 | z->u.binary.right = y; | |
325 | return z; | |
326 | } | |
327 | return x; | |
328 | } | |
329 | ||
330 | static struct grep_expr *compile_pattern_expr(struct grep_pat **list) | |
331 | { | |
332 | return compile_pattern_or(list); | |
333 | } | |
334 | ||
5aaeb733 JH |
335 | static struct grep_expr *grep_true_expr(void) |
336 | { | |
337 | struct grep_expr *z = xcalloc(1, sizeof(*z)); | |
338 | z->node = GREP_NODE_TRUE; | |
339 | return z; | |
340 | } | |
341 | ||
342 | static struct grep_expr *grep_or_expr(struct grep_expr *left, struct grep_expr *right) | |
343 | { | |
344 | struct grep_expr *z = xcalloc(1, sizeof(*z)); | |
345 | z->node = GREP_NODE_OR; | |
346 | z->u.binary.left = left; | |
347 | z->u.binary.right = right; | |
348 | return z; | |
349 | } | |
350 | ||
95ce9ce2 | 351 | static struct grep_expr *prep_header_patterns(struct grep_opt *opt) |
83b5d2f5 JH |
352 | { |
353 | struct grep_pat *p; | |
95ce9ce2 | 354 | struct grep_expr *header_expr; |
5aaeb733 JH |
355 | struct grep_expr *(header_group[GREP_HEADER_FIELD_MAX]); |
356 | enum grep_header_field fld; | |
83b5d2f5 | 357 | |
95ce9ce2 JH |
358 | if (!opt->header_list) |
359 | return NULL; | |
2385f246 | 360 | |
95ce9ce2 JH |
361 | for (p = opt->header_list; p; p = p->next) { |
362 | if (p->token != GREP_PATTERN_HEAD) | |
363 | die("bug: a non-header pattern in grep header list."); | |
364 | if (p->field < 0 || GREP_HEADER_FIELD_MAX <= p->field) | |
365 | die("bug: unknown header field %d", p->field); | |
366 | compile_regexp(p, opt); | |
80235ba7 | 367 | } |
5aaeb733 JH |
368 | |
369 | for (fld = 0; fld < GREP_HEADER_FIELD_MAX; fld++) | |
370 | header_group[fld] = NULL; | |
371 | ||
372 | for (p = opt->header_list; p; p = p->next) { | |
373 | struct grep_expr *h; | |
374 | struct grep_pat *pp = p; | |
375 | ||
376 | h = compile_pattern_atom(&pp); | |
377 | if (!h || pp != p->next) | |
378 | die("bug: malformed header expr"); | |
379 | if (!header_group[p->field]) { | |
380 | header_group[p->field] = h; | |
381 | continue; | |
382 | } | |
383 | header_group[p->field] = grep_or_expr(h, header_group[p->field]); | |
384 | } | |
385 | ||
386 | header_expr = NULL; | |
387 | ||
388 | for (fld = 0; fld < GREP_HEADER_FIELD_MAX; fld++) { | |
389 | if (!header_group[fld]) | |
390 | continue; | |
391 | if (!header_expr) | |
392 | header_expr = grep_true_expr(); | |
393 | header_expr = grep_or_expr(header_group[fld], header_expr); | |
394 | } | |
95ce9ce2 JH |
395 | return header_expr; |
396 | } | |
397 | ||
398 | void compile_grep_patterns(struct grep_opt *opt) | |
399 | { | |
400 | struct grep_pat *p; | |
401 | struct grep_expr *header_expr = prep_header_patterns(opt); | |
0ab7befa | 402 | |
83b5d2f5 | 403 | for (p = opt->pattern_list; p; p = p->next) { |
480c1ca6 JH |
404 | switch (p->token) { |
405 | case GREP_PATTERN: /* atom */ | |
406 | case GREP_PATTERN_HEAD: | |
407 | case GREP_PATTERN_BODY: | |
c822255c | 408 | compile_regexp(p, opt); |
480c1ca6 JH |
409 | break; |
410 | default: | |
83b5d2f5 | 411 | opt->extended = 1; |
480c1ca6 JH |
412 | break; |
413 | } | |
83b5d2f5 JH |
414 | } |
415 | ||
80235ba7 JH |
416 | if (opt->all_match || header_expr) |
417 | opt->extended = 1; | |
418 | else if (!opt->extended) | |
83b5d2f5 JH |
419 | return; |
420 | ||
83b5d2f5 | 421 | p = opt->pattern_list; |
ba150a3f MB |
422 | if (p) |
423 | opt->pattern_expression = compile_pattern_expr(&p); | |
83b5d2f5 JH |
424 | if (p) |
425 | die("incomplete pattern expression: %s", p->pattern); | |
80235ba7 JH |
426 | |
427 | if (!header_expr) | |
428 | return; | |
429 | ||
5aaeb733 | 430 | if (!opt->pattern_expression) |
80235ba7 | 431 | opt->pattern_expression = header_expr; |
5aaeb733 JH |
432 | else |
433 | opt->pattern_expression = grep_or_expr(opt->pattern_expression, | |
434 | header_expr); | |
80235ba7 | 435 | opt->all_match = 1; |
83b5d2f5 JH |
436 | } |
437 | ||
b48fb5b6 JH |
438 | static void free_pattern_expr(struct grep_expr *x) |
439 | { | |
440 | switch (x->node) { | |
5aaeb733 | 441 | case GREP_NODE_TRUE: |
b48fb5b6 JH |
442 | case GREP_NODE_ATOM: |
443 | break; | |
444 | case GREP_NODE_NOT: | |
445 | free_pattern_expr(x->u.unary); | |
446 | break; | |
447 | case GREP_NODE_AND: | |
448 | case GREP_NODE_OR: | |
449 | free_pattern_expr(x->u.binary.left); | |
450 | free_pattern_expr(x->u.binary.right); | |
451 | break; | |
452 | } | |
453 | free(x); | |
454 | } | |
455 | ||
456 | void free_grep_patterns(struct grep_opt *opt) | |
457 | { | |
458 | struct grep_pat *p, *n; | |
459 | ||
460 | for (p = opt->pattern_list; p; p = n) { | |
461 | n = p->next; | |
462 | switch (p->token) { | |
463 | case GREP_PATTERN: /* atom */ | |
464 | case GREP_PATTERN_HEAD: | |
465 | case GREP_PATTERN_BODY: | |
9eceddee FK |
466 | if (p->kws) |
467 | kwsfree(p->kws); | |
468 | else if (p->pcre_regexp) | |
63e7e9d8 MK |
469 | free_pcre_regexp(p); |
470 | else | |
471 | regfree(&p->regexp); | |
526a858a | 472 | free(p->pattern); |
b48fb5b6 JH |
473 | break; |
474 | default: | |
475 | break; | |
476 | } | |
477 | free(p); | |
478 | } | |
479 | ||
480 | if (!opt->extended) | |
481 | return; | |
482 | free_pattern_expr(opt->pattern_expression); | |
483 | } | |
484 | ||
83b5d2f5 JH |
485 | static char *end_of_line(char *cp, unsigned long *left) |
486 | { | |
487 | unsigned long l = *left; | |
488 | while (l && *cp != '\n') { | |
489 | l--; | |
490 | cp++; | |
491 | } | |
492 | *left = l; | |
493 | return cp; | |
494 | } | |
495 | ||
496 | static int word_char(char ch) | |
497 | { | |
498 | return isalnum(ch) || ch == '_'; | |
499 | } | |
500 | ||
55f638bd ML |
501 | static void output_color(struct grep_opt *opt, const void *data, size_t size, |
502 | const char *color) | |
503 | { | |
daa0c3d9 | 504 | if (want_color(opt->color) && color && color[0]) { |
55f638bd ML |
505 | opt->output(opt, color, strlen(color)); |
506 | opt->output(opt, data, size); | |
507 | opt->output(opt, GIT_COLOR_RESET, strlen(GIT_COLOR_RESET)); | |
508 | } else | |
509 | opt->output(opt, data, size); | |
510 | } | |
511 | ||
512 | static void output_sep(struct grep_opt *opt, char sign) | |
513 | { | |
514 | if (opt->null_following_name) | |
515 | opt->output(opt, "\0", 1); | |
516 | else | |
517 | output_color(opt, &sign, 1, opt->color_sep); | |
518 | } | |
519 | ||
83caecca RZ |
520 | static void show_name(struct grep_opt *opt, const char *name) |
521 | { | |
55f638bd | 522 | output_color(opt, name, strlen(name), opt->color_filename); |
5b594f45 | 523 | opt->output(opt, opt->null_following_name ? "\0" : "\n", 1); |
83caecca RZ |
524 | } |
525 | ||
ed40a095 RS |
526 | static int fixmatch(struct grep_pat *p, char *line, char *eol, |
527 | regmatch_t *match) | |
83b5d2f5 | 528 | { |
9eceddee FK |
529 | struct kwsmatch kwsm; |
530 | size_t offset = kwsexec(p->kws, line, eol - line, &kwsm); | |
531 | if (offset == -1) { | |
83b5d2f5 JH |
532 | match->rm_so = match->rm_eo = -1; |
533 | return REG_NOMATCH; | |
9eceddee FK |
534 | } else { |
535 | match->rm_so = offset; | |
536 | match->rm_eo = match->rm_so + kwsm.size[0]; | |
83b5d2f5 JH |
537 | return 0; |
538 | } | |
539 | } | |
540 | ||
f96e5673 RS |
541 | static int regmatch(const regex_t *preg, char *line, char *eol, |
542 | regmatch_t *match, int eflags) | |
543 | { | |
544 | #ifdef REG_STARTEND | |
545 | match->rm_so = 0; | |
546 | match->rm_eo = eol - line; | |
547 | eflags |= REG_STARTEND; | |
548 | #endif | |
549 | return regexec(preg, line, 1, match, eflags); | |
550 | } | |
551 | ||
97e77784 MK |
552 | static int patmatch(struct grep_pat *p, char *line, char *eol, |
553 | regmatch_t *match, int eflags) | |
554 | { | |
555 | int hit; | |
556 | ||
557 | if (p->fixed) | |
558 | hit = !fixmatch(p, line, eol, match); | |
63e7e9d8 MK |
559 | else if (p->pcre_regexp) |
560 | hit = !pcrematch(p, line, eol, match, eflags); | |
97e77784 MK |
561 | else |
562 | hit = !regmatch(&p->regexp, line, eol, match, eflags); | |
563 | ||
564 | return hit; | |
565 | } | |
566 | ||
a4d7d2c6 JH |
567 | static int strip_timestamp(char *bol, char **eol_p) |
568 | { | |
569 | char *eol = *eol_p; | |
570 | int ch; | |
571 | ||
572 | while (bol < --eol) { | |
573 | if (*eol != '>') | |
574 | continue; | |
575 | *eol_p = ++eol; | |
576 | ch = *eol; | |
577 | *eol = '\0'; | |
578 | return ch; | |
579 | } | |
580 | return 0; | |
581 | } | |
582 | ||
583 | static struct { | |
584 | const char *field; | |
585 | size_t len; | |
586 | } header_field[] = { | |
587 | { "author ", 7 }, | |
588 | { "committer ", 10 }, | |
589 | }; | |
590 | ||
d7eb527d | 591 | static int match_one_pattern(struct grep_pat *p, char *bol, char *eol, |
79212772 RS |
592 | enum grep_context ctx, |
593 | regmatch_t *pmatch, int eflags) | |
83b5d2f5 JH |
594 | { |
595 | int hit = 0; | |
a4d7d2c6 | 596 | int saved_ch = 0; |
e701fadb | 597 | const char *start = bol; |
83b5d2f5 | 598 | |
480c1ca6 JH |
599 | if ((p->token != GREP_PATTERN) && |
600 | ((p->token == GREP_PATTERN_HEAD) != (ctx == GREP_CONTEXT_HEAD))) | |
601 | return 0; | |
602 | ||
a4d7d2c6 JH |
603 | if (p->token == GREP_PATTERN_HEAD) { |
604 | const char *field; | |
605 | size_t len; | |
606 | assert(p->field < ARRAY_SIZE(header_field)); | |
607 | field = header_field[p->field].field; | |
608 | len = header_field[p->field].len; | |
609 | if (strncmp(bol, field, len)) | |
610 | return 0; | |
611 | bol += len; | |
612 | saved_ch = strip_timestamp(bol, &eol); | |
613 | } | |
614 | ||
83b5d2f5 | 615 | again: |
97e77784 | 616 | hit = patmatch(p, bol, eol, pmatch, eflags); |
83b5d2f5 | 617 | |
d7eb527d | 618 | if (hit && p->word_regexp) { |
83b5d2f5 | 619 | if ((pmatch[0].rm_so < 0) || |
84201eae | 620 | (eol - bol) < pmatch[0].rm_so || |
83b5d2f5 JH |
621 | (pmatch[0].rm_eo < 0) || |
622 | (eol - bol) < pmatch[0].rm_eo) | |
623 | die("regexp returned nonsense"); | |
624 | ||
625 | /* Match beginning must be either beginning of the | |
626 | * line, or at word boundary (i.e. the last char must | |
627 | * not be a word char). Similarly, match end must be | |
628 | * either end of the line, or at word boundary | |
629 | * (i.e. the next char must not be a word char). | |
630 | */ | |
fb62eb7f | 631 | if ( ((pmatch[0].rm_so == 0) || |
83b5d2f5 JH |
632 | !word_char(bol[pmatch[0].rm_so-1])) && |
633 | ((pmatch[0].rm_eo == (eol-bol)) || | |
634 | !word_char(bol[pmatch[0].rm_eo])) ) | |
635 | ; | |
636 | else | |
637 | hit = 0; | |
638 | ||
84201eae RS |
639 | /* Words consist of at least one character. */ |
640 | if (pmatch->rm_so == pmatch->rm_eo) | |
641 | hit = 0; | |
642 | ||
83b5d2f5 JH |
643 | if (!hit && pmatch[0].rm_so + bol + 1 < eol) { |
644 | /* There could be more than one match on the | |
645 | * line, and the first match might not be | |
646 | * strict word match. But later ones could be! | |
fb62eb7f RS |
647 | * Forward to the next possible start, i.e. the |
648 | * next position following a non-word char. | |
83b5d2f5 JH |
649 | */ |
650 | bol = pmatch[0].rm_so + bol + 1; | |
fb62eb7f RS |
651 | while (word_char(bol[-1]) && bol < eol) |
652 | bol++; | |
dbb6a4ad | 653 | eflags |= REG_NOTBOL; |
fb62eb7f RS |
654 | if (bol < eol) |
655 | goto again; | |
83b5d2f5 JH |
656 | } |
657 | } | |
a4d7d2c6 JH |
658 | if (p->token == GREP_PATTERN_HEAD && saved_ch) |
659 | *eol = saved_ch; | |
e701fadb RS |
660 | if (hit) { |
661 | pmatch[0].rm_so += bol - start; | |
662 | pmatch[0].rm_eo += bol - start; | |
663 | } | |
83b5d2f5 JH |
664 | return hit; |
665 | } | |
666 | ||
d7eb527d RS |
667 | static int match_expr_eval(struct grep_expr *x, char *bol, char *eol, |
668 | enum grep_context ctx, int collect_hits) | |
83b5d2f5 | 669 | { |
0ab7befa | 670 | int h = 0; |
79212772 | 671 | regmatch_t match; |
0ab7befa | 672 | |
c922b01f LT |
673 | if (!x) |
674 | die("Not a valid grep expression"); | |
83b5d2f5 | 675 | switch (x->node) { |
5aaeb733 JH |
676 | case GREP_NODE_TRUE: |
677 | h = 1; | |
678 | break; | |
83b5d2f5 | 679 | case GREP_NODE_ATOM: |
79212772 | 680 | h = match_one_pattern(x->u.atom, bol, eol, ctx, &match, 0); |
83b5d2f5 JH |
681 | break; |
682 | case GREP_NODE_NOT: | |
d7eb527d | 683 | h = !match_expr_eval(x->u.unary, bol, eol, ctx, 0); |
0ab7befa | 684 | break; |
83b5d2f5 | 685 | case GREP_NODE_AND: |
d7eb527d | 686 | if (!match_expr_eval(x->u.binary.left, bol, eol, ctx, 0)) |
252d560d | 687 | return 0; |
d7eb527d | 688 | h = match_expr_eval(x->u.binary.right, bol, eol, ctx, 0); |
0ab7befa | 689 | break; |
83b5d2f5 | 690 | case GREP_NODE_OR: |
0ab7befa | 691 | if (!collect_hits) |
d7eb527d | 692 | return (match_expr_eval(x->u.binary.left, |
0ab7befa | 693 | bol, eol, ctx, 0) || |
d7eb527d | 694 | match_expr_eval(x->u.binary.right, |
0ab7befa | 695 | bol, eol, ctx, 0)); |
d7eb527d | 696 | h = match_expr_eval(x->u.binary.left, bol, eol, ctx, 0); |
0ab7befa | 697 | x->u.binary.left->hit |= h; |
d7eb527d | 698 | h |= match_expr_eval(x->u.binary.right, bol, eol, ctx, 1); |
0ab7befa JH |
699 | break; |
700 | default: | |
d7530708 | 701 | die("Unexpected node type (internal error) %d", x->node); |
83b5d2f5 | 702 | } |
0ab7befa JH |
703 | if (collect_hits) |
704 | x->hit |= h; | |
705 | return h; | |
83b5d2f5 JH |
706 | } |
707 | ||
480c1ca6 | 708 | static int match_expr(struct grep_opt *opt, char *bol, char *eol, |
0ab7befa | 709 | enum grep_context ctx, int collect_hits) |
83b5d2f5 JH |
710 | { |
711 | struct grep_expr *x = opt->pattern_expression; | |
d7eb527d | 712 | return match_expr_eval(x, bol, eol, ctx, collect_hits); |
83b5d2f5 JH |
713 | } |
714 | ||
480c1ca6 | 715 | static int match_line(struct grep_opt *opt, char *bol, char *eol, |
0ab7befa | 716 | enum grep_context ctx, int collect_hits) |
83b5d2f5 JH |
717 | { |
718 | struct grep_pat *p; | |
79212772 RS |
719 | regmatch_t match; |
720 | ||
83b5d2f5 | 721 | if (opt->extended) |
0ab7befa JH |
722 | return match_expr(opt, bol, eol, ctx, collect_hits); |
723 | ||
724 | /* we do not call with collect_hits without being extended */ | |
83b5d2f5 | 725 | for (p = opt->pattern_list; p; p = p->next) { |
79212772 | 726 | if (match_one_pattern(p, bol, eol, ctx, &match, 0)) |
83b5d2f5 JH |
727 | return 1; |
728 | } | |
729 | return 0; | |
730 | } | |
731 | ||
7e8f59d5 RS |
732 | static int match_next_pattern(struct grep_pat *p, char *bol, char *eol, |
733 | enum grep_context ctx, | |
734 | regmatch_t *pmatch, int eflags) | |
735 | { | |
736 | regmatch_t match; | |
737 | ||
738 | if (!match_one_pattern(p, bol, eol, ctx, &match, eflags)) | |
739 | return 0; | |
740 | if (match.rm_so < 0 || match.rm_eo < 0) | |
741 | return 0; | |
742 | if (pmatch->rm_so >= 0 && pmatch->rm_eo >= 0) { | |
743 | if (match.rm_so > pmatch->rm_so) | |
744 | return 1; | |
745 | if (match.rm_so == pmatch->rm_so && match.rm_eo < pmatch->rm_eo) | |
746 | return 1; | |
747 | } | |
748 | pmatch->rm_so = match.rm_so; | |
749 | pmatch->rm_eo = match.rm_eo; | |
750 | return 1; | |
751 | } | |
752 | ||
753 | static int next_match(struct grep_opt *opt, char *bol, char *eol, | |
754 | enum grep_context ctx, regmatch_t *pmatch, int eflags) | |
755 | { | |
756 | struct grep_pat *p; | |
757 | int hit = 0; | |
758 | ||
759 | pmatch->rm_so = pmatch->rm_eo = -1; | |
760 | if (bol < eol) { | |
761 | for (p = opt->pattern_list; p; p = p->next) { | |
762 | switch (p->token) { | |
763 | case GREP_PATTERN: /* atom */ | |
764 | case GREP_PATTERN_HEAD: | |
765 | case GREP_PATTERN_BODY: | |
766 | hit |= match_next_pattern(p, bol, eol, ctx, | |
767 | pmatch, eflags); | |
768 | break; | |
769 | default: | |
770 | break; | |
771 | } | |
772 | } | |
773 | } | |
774 | return hit; | |
775 | } | |
776 | ||
777 | static void show_line(struct grep_opt *opt, char *bol, char *eol, | |
778 | const char *name, unsigned lno, char sign) | |
779 | { | |
780 | int rest = eol - bol; | |
00588bb5 | 781 | char *line_color = NULL; |
7e8f59d5 | 782 | |
a8f0e764 RS |
783 | if (opt->file_break && opt->last_shown == 0) { |
784 | if (opt->show_hunk_mark) | |
785 | opt->output(opt, "\n", 1); | |
ba8ea749 | 786 | } else if (opt->pre_context || opt->post_context || opt->funcbody) { |
046802d0 | 787 | if (opt->last_shown == 0) { |
55f638bd ML |
788 | if (opt->show_hunk_mark) { |
789 | output_color(opt, "--", 2, opt->color_sep); | |
790 | opt->output(opt, "\n", 1); | |
07b838f0 | 791 | } |
55f638bd ML |
792 | } else if (lno > opt->last_shown + 1) { |
793 | output_color(opt, "--", 2, opt->color_sep); | |
794 | opt->output(opt, "\n", 1); | |
795 | } | |
5dd06d38 | 796 | } |
1d84f72e RS |
797 | if (opt->heading && opt->last_shown == 0) { |
798 | output_color(opt, name, strlen(name), opt->color_filename); | |
799 | opt->output(opt, "\n", 1); | |
800 | } | |
5dd06d38 RS |
801 | opt->last_shown = lno; |
802 | ||
1d84f72e | 803 | if (!opt->heading && opt->pathname) { |
55f638bd ML |
804 | output_color(opt, name, strlen(name), opt->color_filename); |
805 | output_sep(opt, sign); | |
5b594f45 FK |
806 | } |
807 | if (opt->linenum) { | |
808 | char buf[32]; | |
809 | snprintf(buf, sizeof(buf), "%d", lno); | |
55f638bd ML |
810 | output_color(opt, buf, strlen(buf), opt->color_lineno); |
811 | output_sep(opt, sign); | |
5b594f45 | 812 | } |
7e8f59d5 RS |
813 | if (opt->color) { |
814 | regmatch_t match; | |
815 | enum grep_context ctx = GREP_CONTEXT_BODY; | |
816 | int ch = *eol; | |
817 | int eflags = 0; | |
818 | ||
00588bb5 ML |
819 | if (sign == ':') |
820 | line_color = opt->color_selected; | |
821 | else if (sign == '-') | |
822 | line_color = opt->color_context; | |
823 | else if (sign == '=') | |
824 | line_color = opt->color_function; | |
7e8f59d5 RS |
825 | *eol = '\0'; |
826 | while (next_match(opt, bol, eol, ctx, &match, eflags)) { | |
1f5b9cc4 RS |
827 | if (match.rm_so == match.rm_eo) |
828 | break; | |
5b594f45 | 829 | |
00588bb5 | 830 | output_color(opt, bol, match.rm_so, line_color); |
55f638bd ML |
831 | output_color(opt, bol + match.rm_so, |
832 | match.rm_eo - match.rm_so, | |
833 | opt->color_match); | |
7e8f59d5 RS |
834 | bol += match.rm_eo; |
835 | rest -= match.rm_eo; | |
836 | eflags = REG_NOTBOL; | |
837 | } | |
838 | *eol = ch; | |
839 | } | |
00588bb5 | 840 | output_color(opt, bol, rest, line_color); |
5b594f45 | 841 | opt->output(opt, "\n", 1); |
7e8f59d5 RS |
842 | } |
843 | ||
0579f91d | 844 | #ifndef NO_PTHREADS |
78db6ea9 JK |
845 | int grep_use_locks; |
846 | ||
0579f91d TR |
847 | /* |
848 | * This lock protects access to the gitattributes machinery, which is | |
849 | * not thread-safe. | |
850 | */ | |
851 | pthread_mutex_t grep_attr_mutex; | |
852 | ||
78db6ea9 | 853 | static inline void grep_attr_lock(void) |
0579f91d | 854 | { |
78db6ea9 | 855 | if (grep_use_locks) |
0579f91d TR |
856 | pthread_mutex_lock(&grep_attr_mutex); |
857 | } | |
858 | ||
78db6ea9 | 859 | static inline void grep_attr_unlock(void) |
0579f91d | 860 | { |
78db6ea9 | 861 | if (grep_use_locks) |
0579f91d TR |
862 | pthread_mutex_unlock(&grep_attr_mutex); |
863 | } | |
b3aeb285 JK |
864 | |
865 | /* | |
866 | * Same as git_attr_mutex, but protecting the thread-unsafe object db access. | |
867 | */ | |
868 | pthread_mutex_t grep_read_mutex; | |
869 | ||
0579f91d | 870 | #else |
78db6ea9 JK |
871 | #define grep_attr_lock() |
872 | #define grep_attr_unlock() | |
0579f91d TR |
873 | #endif |
874 | ||
e1327023 | 875 | static int match_funcname(struct grep_opt *opt, struct grep_source *gs, char *bol, char *eol) |
2944e4e6 | 876 | { |
60ecac98 | 877 | xdemitconf_t *xecfg = opt->priv; |
0579f91d | 878 | if (xecfg && !xecfg->find_func) { |
94ad9d9e JK |
879 | grep_source_load_driver(gs); |
880 | if (gs->driver->funcname.pattern) { | |
881 | const struct userdiff_funcname *pe = &gs->driver->funcname; | |
0579f91d TR |
882 | xdiff_set_find_func(xecfg, pe->pattern, pe->cflags); |
883 | } else { | |
884 | xecfg = opt->priv = NULL; | |
885 | } | |
886 | } | |
887 | ||
888 | if (xecfg) { | |
60ecac98 RS |
889 | char buf[1]; |
890 | return xecfg->find_func(bol, eol - bol, buf, 1, | |
891 | xecfg->find_func_priv) >= 0; | |
892 | } | |
893 | ||
2944e4e6 RS |
894 | if (bol == eol) |
895 | return 0; | |
896 | if (isalpha(*bol) || *bol == '_' || *bol == '$') | |
897 | return 1; | |
898 | return 0; | |
899 | } | |
900 | ||
e1327023 JK |
901 | static void show_funcname_line(struct grep_opt *opt, struct grep_source *gs, |
902 | char *bol, unsigned lno) | |
2944e4e6 | 903 | { |
e1327023 | 904 | while (bol > gs->buf) { |
2944e4e6 RS |
905 | char *eol = --bol; |
906 | ||
e1327023 | 907 | while (bol > gs->buf && bol[-1] != '\n') |
2944e4e6 RS |
908 | bol--; |
909 | lno--; | |
910 | ||
911 | if (lno <= opt->last_shown) | |
912 | break; | |
913 | ||
e1327023 JK |
914 | if (match_funcname(opt, gs, bol, eol)) { |
915 | show_line(opt, bol, eol, gs->name, lno, '='); | |
2944e4e6 RS |
916 | break; |
917 | } | |
918 | } | |
919 | } | |
920 | ||
e1327023 | 921 | static void show_pre_context(struct grep_opt *opt, struct grep_source *gs, |
ba8ea749 | 922 | char *bol, char *end, unsigned lno) |
49de3216 | 923 | { |
2944e4e6 | 924 | unsigned cur = lno, from = 1, funcname_lno = 0; |
ba8ea749 RS |
925 | int funcname_needed = !!opt->funcname; |
926 | ||
e1327023 | 927 | if (opt->funcbody && !match_funcname(opt, gs, bol, end)) |
ba8ea749 | 928 | funcname_needed = 2; |
49de3216 RS |
929 | |
930 | if (opt->pre_context < lno) | |
931 | from = lno - opt->pre_context; | |
932 | if (from <= opt->last_shown) | |
933 | from = opt->last_shown + 1; | |
934 | ||
935 | /* Rewind. */ | |
e1327023 | 936 | while (bol > gs->buf && |
ba8ea749 | 937 | cur > (funcname_needed == 2 ? opt->last_shown + 1 : from)) { |
2944e4e6 RS |
938 | char *eol = --bol; |
939 | ||
e1327023 | 940 | while (bol > gs->buf && bol[-1] != '\n') |
49de3216 RS |
941 | bol--; |
942 | cur--; | |
e1327023 | 943 | if (funcname_needed && match_funcname(opt, gs, bol, eol)) { |
2944e4e6 RS |
944 | funcname_lno = cur; |
945 | funcname_needed = 0; | |
946 | } | |
49de3216 RS |
947 | } |
948 | ||
2944e4e6 RS |
949 | /* We need to look even further back to find a function signature. */ |
950 | if (opt->funcname && funcname_needed) | |
e1327023 | 951 | show_funcname_line(opt, gs, bol, cur); |
2944e4e6 | 952 | |
49de3216 RS |
953 | /* Back forward. */ |
954 | while (cur < lno) { | |
2944e4e6 | 955 | char *eol = bol, sign = (cur == funcname_lno) ? '=' : '-'; |
49de3216 RS |
956 | |
957 | while (*eol != '\n') | |
958 | eol++; | |
e1327023 | 959 | show_line(opt, bol, eol, gs->name, cur, sign); |
49de3216 RS |
960 | bol = eol + 1; |
961 | cur++; | |
962 | } | |
963 | } | |
964 | ||
a26345b6 JH |
965 | static int should_lookahead(struct grep_opt *opt) |
966 | { | |
967 | struct grep_pat *p; | |
968 | ||
969 | if (opt->extended) | |
970 | return 0; /* punt for too complex stuff */ | |
971 | if (opt->invert) | |
972 | return 0; | |
973 | for (p = opt->pattern_list; p; p = p->next) { | |
974 | if (p->token != GREP_PATTERN) | |
975 | return 0; /* punt for "header only" and stuff */ | |
976 | } | |
977 | return 1; | |
978 | } | |
979 | ||
980 | static int look_ahead(struct grep_opt *opt, | |
981 | unsigned long *left_p, | |
982 | unsigned *lno_p, | |
983 | char **bol_p) | |
984 | { | |
985 | unsigned lno = *lno_p; | |
986 | char *bol = *bol_p; | |
987 | struct grep_pat *p; | |
988 | char *sp, *last_bol; | |
989 | regoff_t earliest = -1; | |
990 | ||
991 | for (p = opt->pattern_list; p; p = p->next) { | |
992 | int hit; | |
993 | regmatch_t m; | |
994 | ||
97e77784 | 995 | hit = patmatch(p, bol, bol + *left_p, &m, 0); |
a26345b6 JH |
996 | if (!hit || m.rm_so < 0 || m.rm_eo < 0) |
997 | continue; | |
998 | if (earliest < 0 || m.rm_so < earliest) | |
999 | earliest = m.rm_so; | |
1000 | } | |
1001 | ||
1002 | if (earliest < 0) { | |
1003 | *bol_p = bol + *left_p; | |
1004 | *left_p = 0; | |
1005 | return 1; | |
1006 | } | |
1007 | for (sp = bol + earliest; bol < sp && sp[-1] != '\n'; sp--) | |
1008 | ; /* find the beginning of the line */ | |
1009 | last_bol = sp; | |
1010 | ||
1011 | for (sp = bol; sp < last_bol; sp++) { | |
1012 | if (*sp == '\n') | |
1013 | lno++; | |
1014 | } | |
1015 | *left_p -= last_bol - bol; | |
1016 | *bol_p = last_bol; | |
1017 | *lno_p = lno; | |
1018 | return 0; | |
1019 | } | |
1020 | ||
5b594f45 FK |
1021 | static void std_output(struct grep_opt *opt, const void *buf, size_t size) |
1022 | { | |
1023 | fwrite(buf, size, 1, stdout); | |
1024 | } | |
1025 | ||
e1327023 | 1026 | static int grep_source_1(struct grep_opt *opt, struct grep_source *gs, int collect_hits) |
83b5d2f5 | 1027 | { |
e1327023 JK |
1028 | char *bol; |
1029 | unsigned long left; | |
83b5d2f5 | 1030 | unsigned lno = 1; |
83b5d2f5 | 1031 | unsigned last_hit = 0; |
83b5d2f5 | 1032 | int binary_match_only = 0; |
83b5d2f5 | 1033 | unsigned count = 0; |
a26345b6 | 1034 | int try_lookahead = 0; |
ba8ea749 | 1035 | int show_function = 0; |
480c1ca6 | 1036 | enum grep_context ctx = GREP_CONTEXT_HEAD; |
60ecac98 | 1037 | xdemitconf_t xecfg; |
83b5d2f5 | 1038 | |
5b594f45 FK |
1039 | if (!opt->output) |
1040 | opt->output = std_output; | |
1041 | ||
ba8ea749 RS |
1042 | if (opt->pre_context || opt->post_context || opt->file_break || |
1043 | opt->funcbody) { | |
08303c36 RS |
1044 | /* Show hunk marks, except for the first file. */ |
1045 | if (opt->last_shown) | |
1046 | opt->show_hunk_mark = 1; | |
1047 | /* | |
1048 | * If we're using threads then we can't easily identify | |
1049 | * the first file. Always put hunk marks in that case | |
1050 | * and skip the very first one later in work_done(). | |
1051 | */ | |
1052 | if (opt->output != std_output) | |
1053 | opt->show_hunk_mark = 1; | |
1054 | } | |
431d6e7b RS |
1055 | opt->last_shown = 0; |
1056 | ||
64fcec78 RS |
1057 | switch (opt->binary) { |
1058 | case GREP_BINARY_DEFAULT: | |
41b59bfc | 1059 | if (grep_source_is_binary(gs)) |
83b5d2f5 | 1060 | binary_match_only = 1; |
64fcec78 RS |
1061 | break; |
1062 | case GREP_BINARY_NOMATCH: | |
41b59bfc | 1063 | if (grep_source_is_binary(gs)) |
83b5d2f5 | 1064 | return 0; /* Assume unmatch */ |
64fcec78 RS |
1065 | break; |
1066 | case GREP_BINARY_TEXT: | |
1067 | break; | |
1068 | default: | |
1069 | die("bug: unknown binary handling mode"); | |
83b5d2f5 JH |
1070 | } |
1071 | ||
60ecac98 | 1072 | memset(&xecfg, 0, sizeof(xecfg)); |
0579f91d TR |
1073 | opt->priv = &xecfg; |
1074 | ||
a26345b6 | 1075 | try_lookahead = should_lookahead(opt); |
60ecac98 | 1076 | |
08265798 JK |
1077 | if (grep_source_load(gs) < 0) |
1078 | return 0; | |
1079 | ||
e1327023 JK |
1080 | bol = gs->buf; |
1081 | left = gs->size; | |
83b5d2f5 JH |
1082 | while (left) { |
1083 | char *eol, ch; | |
0ab7befa | 1084 | int hit; |
83b5d2f5 | 1085 | |
a26345b6 | 1086 | /* |
8997da38 | 1087 | * look_ahead() skips quickly to the line that possibly |
a26345b6 JH |
1088 | * has the next hit; don't call it if we need to do |
1089 | * something more than just skipping the current line | |
1090 | * in response to an unmatch for the current line. E.g. | |
1091 | * inside a post-context window, we will show the current | |
1092 | * line as a context around the previous hit when it | |
1093 | * doesn't hit. | |
1094 | */ | |
1095 | if (try_lookahead | |
1096 | && !(last_hit | |
ba8ea749 RS |
1097 | && (show_function || |
1098 | lno <= last_hit + opt->post_context)) | |
a26345b6 JH |
1099 | && look_ahead(opt, &left, &lno, &bol)) |
1100 | break; | |
83b5d2f5 JH |
1101 | eol = end_of_line(bol, &left); |
1102 | ch = *eol; | |
1103 | *eol = 0; | |
1104 | ||
480c1ca6 JH |
1105 | if ((ctx == GREP_CONTEXT_HEAD) && (eol == bol)) |
1106 | ctx = GREP_CONTEXT_BODY; | |
1107 | ||
0ab7befa | 1108 | hit = match_line(opt, bol, eol, ctx, collect_hits); |
83b5d2f5 JH |
1109 | *eol = ch; |
1110 | ||
0ab7befa JH |
1111 | if (collect_hits) |
1112 | goto next_line; | |
1113 | ||
83b5d2f5 JH |
1114 | /* "grep -v -e foo -e bla" should list lines |
1115 | * that do not have either, so inversion should | |
1116 | * be done outside. | |
1117 | */ | |
1118 | if (opt->invert) | |
1119 | hit = !hit; | |
1120 | if (opt->unmatch_name_only) { | |
1121 | if (hit) | |
1122 | return 0; | |
1123 | goto next_line; | |
1124 | } | |
1125 | if (hit) { | |
1126 | count++; | |
1127 | if (opt->status_only) | |
1128 | return 1; | |
321ffcc0 | 1129 | if (opt->name_only) { |
e1327023 | 1130 | show_name(opt, gs->name); |
321ffcc0 RS |
1131 | return 1; |
1132 | } | |
c30c10cf RS |
1133 | if (opt->count) |
1134 | goto next_line; | |
83b5d2f5 | 1135 | if (binary_match_only) { |
5b594f45 | 1136 | opt->output(opt, "Binary file ", 12); |
e1327023 | 1137 | output_color(opt, gs->name, strlen(gs->name), |
55f638bd | 1138 | opt->color_filename); |
5b594f45 | 1139 | opt->output(opt, " matches\n", 9); |
83b5d2f5 JH |
1140 | return 1; |
1141 | } | |
83b5d2f5 JH |
1142 | /* Hit at this line. If we haven't shown the |
1143 | * pre-context lines, we would need to show them. | |
83b5d2f5 | 1144 | */ |
ba8ea749 | 1145 | if (opt->pre_context || opt->funcbody) |
e1327023 | 1146 | show_pre_context(opt, gs, bol, eol, lno); |
2944e4e6 | 1147 | else if (opt->funcname) |
e1327023 JK |
1148 | show_funcname_line(opt, gs, bol, lno); |
1149 | show_line(opt, bol, eol, gs->name, lno, ':'); | |
5dd06d38 | 1150 | last_hit = lno; |
ba8ea749 RS |
1151 | if (opt->funcbody) |
1152 | show_function = 1; | |
1153 | goto next_line; | |
83b5d2f5 | 1154 | } |
e1327023 | 1155 | if (show_function && match_funcname(opt, gs, bol, eol)) |
ba8ea749 RS |
1156 | show_function = 0; |
1157 | if (show_function || | |
1158 | (last_hit && lno <= last_hit + opt->post_context)) { | |
83b5d2f5 JH |
1159 | /* If the last hit is within the post context, |
1160 | * we need to show this line. | |
1161 | */ | |
e1327023 | 1162 | show_line(opt, bol, eol, gs->name, lno, '-'); |
83b5d2f5 | 1163 | } |
83b5d2f5 JH |
1164 | |
1165 | next_line: | |
1166 | bol = eol + 1; | |
1167 | if (!left) | |
1168 | break; | |
1169 | left--; | |
1170 | lno++; | |
1171 | } | |
1172 | ||
0ab7befa JH |
1173 | if (collect_hits) |
1174 | return 0; | |
b48fb5b6 | 1175 | |
83b5d2f5 JH |
1176 | if (opt->status_only) |
1177 | return 0; | |
1178 | if (opt->unmatch_name_only) { | |
1179 | /* We did not see any hit, so we want to show this */ | |
e1327023 | 1180 | show_name(opt, gs->name); |
83b5d2f5 JH |
1181 | return 1; |
1182 | } | |
1183 | ||
60ecac98 RS |
1184 | xdiff_clear_find_func(&xecfg); |
1185 | opt->priv = NULL; | |
1186 | ||
83b5d2f5 JH |
1187 | /* NEEDSWORK: |
1188 | * The real "grep -c foo *.c" gives many "bar.c:0" lines, | |
1189 | * which feels mostly useless but sometimes useful. Maybe | |
1190 | * make it another option? For now suppress them. | |
1191 | */ | |
5b594f45 FK |
1192 | if (opt->count && count) { |
1193 | char buf[32]; | |
e1327023 | 1194 | output_color(opt, gs->name, strlen(gs->name), opt->color_filename); |
55f638bd ML |
1195 | output_sep(opt, ':'); |
1196 | snprintf(buf, sizeof(buf), "%u\n", count); | |
5b594f45 | 1197 | opt->output(opt, buf, strlen(buf)); |
c30c10cf | 1198 | return 1; |
5b594f45 | 1199 | } |
83b5d2f5 JH |
1200 | return !!last_hit; |
1201 | } | |
1202 | ||
0ab7befa JH |
1203 | static void clr_hit_marker(struct grep_expr *x) |
1204 | { | |
1205 | /* All-hit markers are meaningful only at the very top level | |
1206 | * OR node. | |
1207 | */ | |
1208 | while (1) { | |
1209 | x->hit = 0; | |
1210 | if (x->node != GREP_NODE_OR) | |
1211 | return; | |
1212 | x->u.binary.left->hit = 0; | |
1213 | x = x->u.binary.right; | |
1214 | } | |
1215 | } | |
1216 | ||
1217 | static int chk_hit_marker(struct grep_expr *x) | |
1218 | { | |
1219 | /* Top level nodes have hit markers. See if they all are hits */ | |
1220 | while (1) { | |
1221 | if (x->node != GREP_NODE_OR) | |
1222 | return x->hit; | |
1223 | if (!x->u.binary.left->hit) | |
1224 | return 0; | |
1225 | x = x->u.binary.right; | |
1226 | } | |
1227 | } | |
1228 | ||
e1327023 | 1229 | int grep_source(struct grep_opt *opt, struct grep_source *gs) |
0ab7befa JH |
1230 | { |
1231 | /* | |
1232 | * we do not have to do the two-pass grep when we do not check | |
1233 | * buffer-wide "all-match". | |
1234 | */ | |
1235 | if (!opt->all_match) | |
e1327023 | 1236 | return grep_source_1(opt, gs, 0); |
0ab7befa JH |
1237 | |
1238 | /* Otherwise the toplevel "or" terms hit a bit differently. | |
1239 | * We first clear hit markers from them. | |
1240 | */ | |
1241 | clr_hit_marker(opt->pattern_expression); | |
e1327023 | 1242 | grep_source_1(opt, gs, 1); |
0ab7befa JH |
1243 | |
1244 | if (!chk_hit_marker(opt->pattern_expression)) | |
1245 | return 0; | |
1246 | ||
e1327023 JK |
1247 | return grep_source_1(opt, gs, 0); |
1248 | } | |
1249 | ||
c876d6da | 1250 | int grep_buffer(struct grep_opt *opt, char *buf, unsigned long size) |
e1327023 JK |
1251 | { |
1252 | struct grep_source gs; | |
1253 | int r; | |
1254 | ||
c876d6da | 1255 | grep_source_init(&gs, GREP_SOURCE_BUF, NULL, NULL); |
e1327023 JK |
1256 | gs.buf = buf; |
1257 | gs.size = size; | |
1258 | ||
1259 | r = grep_source(opt, &gs); | |
1260 | ||
1261 | grep_source_clear(&gs); | |
1262 | return r; | |
1263 | } | |
1264 | ||
1265 | void grep_source_init(struct grep_source *gs, enum grep_source_type type, | |
1266 | const char *name, const void *identifier) | |
1267 | { | |
1268 | gs->type = type; | |
1269 | gs->name = name ? xstrdup(name) : NULL; | |
1270 | gs->buf = NULL; | |
1271 | gs->size = 0; | |
94ad9d9e | 1272 | gs->driver = NULL; |
e1327023 JK |
1273 | |
1274 | switch (type) { | |
1275 | case GREP_SOURCE_FILE: | |
1276 | gs->identifier = xstrdup(identifier); | |
1277 | break; | |
1278 | case GREP_SOURCE_SHA1: | |
1279 | gs->identifier = xmalloc(20); | |
1280 | memcpy(gs->identifier, identifier, 20); | |
1281 | break; | |
1282 | case GREP_SOURCE_BUF: | |
1283 | gs->identifier = NULL; | |
1284 | } | |
1285 | } | |
1286 | ||
1287 | void grep_source_clear(struct grep_source *gs) | |
1288 | { | |
1289 | free(gs->name); | |
1290 | gs->name = NULL; | |
1291 | free(gs->identifier); | |
1292 | gs->identifier = NULL; | |
1293 | grep_source_clear_data(gs); | |
1294 | } | |
1295 | ||
1296 | void grep_source_clear_data(struct grep_source *gs) | |
1297 | { | |
1298 | switch (gs->type) { | |
1299 | case GREP_SOURCE_FILE: | |
1300 | case GREP_SOURCE_SHA1: | |
1301 | free(gs->buf); | |
1302 | gs->buf = NULL; | |
1303 | gs->size = 0; | |
1304 | break; | |
1305 | case GREP_SOURCE_BUF: | |
1306 | /* leave user-provided buf intact */ | |
1307 | break; | |
1308 | } | |
1309 | } | |
1310 | ||
1311 | static int grep_source_load_sha1(struct grep_source *gs) | |
1312 | { | |
1313 | enum object_type type; | |
1314 | ||
1315 | grep_read_lock(); | |
1316 | gs->buf = read_sha1_file(gs->identifier, &type, &gs->size); | |
1317 | grep_read_unlock(); | |
1318 | ||
1319 | if (!gs->buf) | |
1320 | return error(_("'%s': unable to read %s"), | |
1321 | gs->name, | |
1322 | sha1_to_hex(gs->identifier)); | |
1323 | return 0; | |
1324 | } | |
1325 | ||
1326 | static int grep_source_load_file(struct grep_source *gs) | |
1327 | { | |
1328 | const char *filename = gs->identifier; | |
1329 | struct stat st; | |
1330 | char *data; | |
1331 | size_t size; | |
1332 | int i; | |
1333 | ||
1334 | if (lstat(filename, &st) < 0) { | |
1335 | err_ret: | |
1336 | if (errno != ENOENT) | |
1337 | error(_("'%s': %s"), filename, strerror(errno)); | |
1338 | return -1; | |
1339 | } | |
1340 | if (!S_ISREG(st.st_mode)) | |
1341 | return -1; | |
1342 | size = xsize_t(st.st_size); | |
1343 | i = open(filename, O_RDONLY); | |
1344 | if (i < 0) | |
1345 | goto err_ret; | |
1346 | data = xmalloc(size + 1); | |
1347 | if (st.st_size != read_in_full(i, data, size)) { | |
1348 | error(_("'%s': short read %s"), filename, strerror(errno)); | |
1349 | close(i); | |
1350 | free(data); | |
1351 | return -1; | |
1352 | } | |
1353 | close(i); | |
1354 | data[size] = 0; | |
1355 | ||
1356 | gs->buf = data; | |
1357 | gs->size = size; | |
1358 | return 0; | |
1359 | } | |
1360 | ||
1361 | int grep_source_load(struct grep_source *gs) | |
1362 | { | |
1363 | if (gs->buf) | |
1364 | return 0; | |
1365 | ||
1366 | switch (gs->type) { | |
1367 | case GREP_SOURCE_FILE: | |
1368 | return grep_source_load_file(gs); | |
1369 | case GREP_SOURCE_SHA1: | |
1370 | return grep_source_load_sha1(gs); | |
1371 | case GREP_SOURCE_BUF: | |
1372 | return gs->buf ? 0 : -1; | |
1373 | } | |
1374 | die("BUG: invalid grep_source type"); | |
0ab7befa | 1375 | } |
94ad9d9e JK |
1376 | |
1377 | void grep_source_load_driver(struct grep_source *gs) | |
1378 | { | |
1379 | if (gs->driver) | |
1380 | return; | |
1381 | ||
1382 | grep_attr_lock(); | |
1383 | gs->driver = userdiff_find_by_path(gs->name); | |
1384 | if (!gs->driver) | |
1385 | gs->driver = userdiff_find_by_name("default"); | |
1386 | grep_attr_unlock(); | |
1387 | } | |
41b59bfc JK |
1388 | |
1389 | int grep_source_is_binary(struct grep_source *gs) | |
1390 | { | |
1391 | grep_source_load_driver(gs); | |
1392 | if (gs->driver->binary != -1) | |
1393 | return gs->driver->binary; | |
1394 | ||
1395 | if (!grep_source_load(gs)) | |
1396 | return buffer_is_binary(gs->buf, gs->size); | |
1397 | ||
1398 | return 0; | |
1399 | } |