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