?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Merge branch 'ab/pcre-jit-fixes'
[alt-git.git] / grep.c
blob5d268b13d9f7dabc938be838229983233cf28f0a
1 #include "cache.h"
2 #include "config.h"
3 #include "grep.h"
4 #include "object-store.h"
5 #include "userdiff.h"
6 #include "xdiff-interface.h"
7 #include "diff.h"
8 #include "diffcore.h"
9 #include "commit.h"
10 #include "quote.h"
11 #include "help.h"
12
13 static int grep_source_load(struct grep_source *gs);
14 static int grep_source_is_binary(struct grep_source *gs,
15 struct index_state *istate);
16
17 static struct grep_opt grep_defaults;
18
19 static const char *color_grep_slots[] = {
20 [GREP_COLOR_CONTEXT] = "context",
21 [GREP_COLOR_FILENAME] = "filename",
22 [GREP_COLOR_FUNCTION] = "function",
23 [GREP_COLOR_LINENO] = "lineNumber",
24 [GREP_COLOR_COLUMNNO] = "column",
25 [GREP_COLOR_MATCH_CONTEXT] = "matchContext",
26 [GREP_COLOR_MATCH_SELECTED] = "matchSelected",
27 [GREP_COLOR_SELECTED] = "selected",
28 [GREP_COLOR_SEP] = "separator",
29 };
30
31 static void std_output(struct grep_opt *opt, const void *buf, size_t size)
32 {
33 fwrite(buf, size, 1, stdout);
34 }
35
36 static void color_set(char *dst, const char *color_bytes)
37 {
38 xsnprintf(dst, COLOR_MAXLEN, "%s", color_bytes);
39 }
40
41 /*
42 * Initialize the grep_defaults template with hardcoded defaults.
43 * We could let the compiler do this, but without C99 initializers
44 * the code gets unwieldy and unreadable, so...
45 */
46 void init_grep_defaults(struct repository *repo)
47 {
48 struct grep_opt *opt = &grep_defaults;
49 static int run_once;
50
51 if (run_once)
52 return;
53 run_once++;
54
55 memset(opt, 0, sizeof(*opt));
56 opt->repo = repo;
57 opt->relative = 1;
58 opt->pathname = 1;
59 opt->max_depth = -1;
60 opt->pattern_type_option = GREP_PATTERN_TYPE_UNSPECIFIED;
61 color_set(opt->colors[GREP_COLOR_CONTEXT], "");
62 color_set(opt->colors[GREP_COLOR_FILENAME], "");
63 color_set(opt->colors[GREP_COLOR_FUNCTION], "");
64 color_set(opt->colors[GREP_COLOR_LINENO], "");
65 color_set(opt->colors[GREP_COLOR_COLUMNNO], "");
66 color_set(opt->colors[GREP_COLOR_MATCH_CONTEXT], GIT_COLOR_BOLD_RED);
67 color_set(opt->colors[GREP_COLOR_MATCH_SELECTED], GIT_COLOR_BOLD_RED);
68 color_set(opt->colors[GREP_COLOR_SELECTED], "");
69 color_set(opt->colors[GREP_COLOR_SEP], GIT_COLOR_CYAN);
70 opt->only_matching = 0;
71 opt->color = -1;
72 opt->output = std_output;
73 }
74
75 static int parse_pattern_type_arg(const char *opt, const char *arg)
76 {
77 if (!strcmp(arg, "default"))
78 return GREP_PATTERN_TYPE_UNSPECIFIED;
79 else if (!strcmp(arg, "basic"))
80 return GREP_PATTERN_TYPE_BRE;
81 else if (!strcmp(arg, "extended"))
82 return GREP_PATTERN_TYPE_ERE;
83 else if (!strcmp(arg, "fixed"))
84 return GREP_PATTERN_TYPE_FIXED;
85 else if (!strcmp(arg, "perl"))
86 return GREP_PATTERN_TYPE_PCRE;
87 die("bad %s argument: %s", opt, arg);
88 }
89
90 define_list_config_array_extra(color_grep_slots, {"match"});
91
92 /*
93 * Read the configuration file once and store it in
94 * the grep_defaults template.
95 */
96 int grep_config(const char *var, const char *value, void *cb)
97 {
98 struct grep_opt *opt = &grep_defaults;
99 const char *slot;
100
101 if (userdiff_config(var, value) < 0)
102 return -1;
103
104 if (!strcmp(var, "grep.extendedregexp")) {
105 opt->extended_regexp_option = git_config_bool(var, value);
106 return 0;
107 }
108
109 if (!strcmp(var, "grep.patterntype")) {
110 opt->pattern_type_option = parse_pattern_type_arg(var, value);
111 return 0;
112 }
113
114 if (!strcmp(var, "grep.linenumber")) {
115 opt->linenum = git_config_bool(var, value);
116 return 0;
117 }
118 if (!strcmp(var, "grep.column")) {
119 opt->columnnum = git_config_bool(var, value);
120 return 0;
121 }
122
123 if (!strcmp(var, "grep.fullname")) {
124 opt->relative = !git_config_bool(var, value);
125 return 0;
126 }
127
128 if (!strcmp(var, "color.grep"))
129 opt->color = git_config_colorbool(var, value);
130 if (!strcmp(var, "color.grep.match")) {
131 if (grep_config("color.grep.matchcontext", value, cb) < 0)
132 return -1;
133 if (grep_config("color.grep.matchselected", value, cb) < 0)
134 return -1;
135 } else if (skip_prefix(var, "color.grep.", &slot)) {
136 int i = LOOKUP_CONFIG(color_grep_slots, slot);
137 char *color;
138
139 if (i < 0)
140 return -1;
141 color = opt->colors[i];
142 if (!value)
143 return config_error_nonbool(var);
144 return color_parse(value, color);
145 }
146 return 0;
147 }
148
149 /*
150 * Initialize one instance of grep_opt and copy the
151 * default values from the template we read the configuration
152 * information in an earlier call to git_config(grep_config).
153 */
154 void grep_init(struct grep_opt *opt, struct repository *repo, const char *prefix)
155 {
156 struct grep_opt *def = &grep_defaults;
157 int i;
158
159 memset(opt, 0, sizeof(*opt));
160 opt->repo = repo;
161 opt->prefix = prefix;
162 opt->prefix_length = (prefix && *prefix) ? strlen(prefix) : 0;
163 opt->pattern_tail = &opt->pattern_list;
164 opt->header_tail = &opt->header_list;
165
166 opt->only_matching = def->only_matching;
167 opt->color = def->color;
168 opt->extended_regexp_option = def->extended_regexp_option;
169 opt->pattern_type_option = def->pattern_type_option;
170 opt->linenum = def->linenum;
171 opt->columnnum = def->columnnum;
172 opt->max_depth = def->max_depth;
173 opt->pathname = def->pathname;
174 opt->relative = def->relative;
175 opt->output = def->output;
176
177 for (i = 0; i < NR_GREP_COLORS; i++)
178 color_set(opt->colors[i], def->colors[i]);
179 }
180
181 static void grep_set_pattern_type_option(enum grep_pattern_type pattern_type, struct grep_opt *opt)
182 {
183 /*
184 * When committing to the pattern type by setting the relevant
185 * fields in grep_opt it's generally not necessary to zero out
186 * the fields we're not choosing, since they won't have been
187 * set by anything. The extended_regexp_option field is the
188 * only exception to this.
189 *
190 * This is because in the process of parsing grep.patternType
191 * & grep.extendedRegexp we set opt->pattern_type_option and
192 * opt->extended_regexp_option, respectively. We then
193 * internally use opt->extended_regexp_option to see if we're
194 * compiling an ERE. It must be unset if that's not actually
195 * the case.
196 */
197 if (pattern_type != GREP_PATTERN_TYPE_ERE &&
198 opt->extended_regexp_option)
199 opt->extended_regexp_option = 0;
200
201 switch (pattern_type) {
202 case GREP_PATTERN_TYPE_UNSPECIFIED:
203 /* fall through */
204
205 case GREP_PATTERN_TYPE_BRE:
206 break;
207
208 case GREP_PATTERN_TYPE_ERE:
209 opt->extended_regexp_option = 1;
210 break;
211
212 case GREP_PATTERN_TYPE_FIXED:
213 opt->fixed = 1;
214 break;
215
216 case GREP_PATTERN_TYPE_PCRE:
217 #ifdef USE_LIBPCRE2
218 opt->pcre2 = 1;
219 #else
220 /*
221 * It's important that pcre1 always be assigned to
222 * even when there's no USE_LIBPCRE* defined. We still
223 * call the PCRE stub function, it just dies with
224 * "cannot use Perl-compatible regexes[...]".
225 */
226 opt->pcre1 = 1;
227 #endif
228 break;
229 }
230 }
231
232 void grep_commit_pattern_type(enum grep_pattern_type pattern_type, struct grep_opt *opt)
233 {
234 if (pattern_type != GREP_PATTERN_TYPE_UNSPECIFIED)
235 grep_set_pattern_type_option(pattern_type, opt);
236 else if (opt->pattern_type_option != GREP_PATTERN_TYPE_UNSPECIFIED)
237 grep_set_pattern_type_option(opt->pattern_type_option, opt);
238 else if (opt->extended_regexp_option)
239 /*
240 * This branch *must* happen after setting from the
241 * opt->pattern_type_option above, we don't want
242 * grep.extendedRegexp to override grep.patternType!
243 */
244 grep_set_pattern_type_option(GREP_PATTERN_TYPE_ERE, opt);
245 }
246
247 static struct grep_pat *create_grep_pat(const char *pat, size_t patlen,
248 const char *origin, int no,
249 enum grep_pat_token t,
250 enum grep_header_field field)
251 {
252 struct grep_pat *p = xcalloc(1, sizeof(*p));
253 p->pattern = xmemdupz(pat, patlen);
254 p->patternlen = patlen;
255 p->origin = origin;
256 p->no = no;
257 p->token = t;
258 p->field = field;
259 return p;
260 }
261
262 static void do_append_grep_pat(struct grep_pat ***tail, struct grep_pat *p)
263 {
264 **tail = p;
265 *tail = &p->next;
266 p->next = NULL;
267
268 switch (p->token) {
269 case GREP_PATTERN: /* atom */
270 case GREP_PATTERN_HEAD:
271 case GREP_PATTERN_BODY:
272 for (;;) {
273 struct grep_pat *new_pat;
274 size_t len = 0;
275 char *cp = p->pattern + p->patternlen, *nl = NULL;
276 while (++len <= p->patternlen) {
277 if (*(--cp) == '\n') {
278 nl = cp;
279 break;
280 }
281 }
282 if (!nl)
283 break;
284 new_pat = create_grep_pat(nl + 1, len - 1, p->origin,
285 p->no, p->token, p->field);
286 new_pat->next = p->next;
287 if (!p->next)
288 *tail = &new_pat->next;
289 p->next = new_pat;
290 *nl = '\0';
291 p->patternlen -= len;
292 }
293 break;
294 default:
295 break;
296 }
297 }
298
299 void append_header_grep_pattern(struct grep_opt *opt,
300 enum grep_header_field field, const char *pat)
301 {
302 struct grep_pat *p = create_grep_pat(pat, strlen(pat), "header", 0,
303 GREP_PATTERN_HEAD, field);
304 if (field == GREP_HEADER_REFLOG)
305 opt->use_reflog_filter = 1;
306 do_append_grep_pat(&opt->header_tail, p);
307 }
308
309 void append_grep_pattern(struct grep_opt *opt, const char *pat,
310 const char *origin, int no, enum grep_pat_token t)
311 {
312 append_grep_pat(opt, pat, strlen(pat), origin, no, t);
313 }
314
315 void append_grep_pat(struct grep_opt *opt, const char *pat, size_t patlen,
316 const char *origin, int no, enum grep_pat_token t)
317 {
318 struct grep_pat *p = create_grep_pat(pat, patlen, origin, no, t, 0);
319 do_append_grep_pat(&opt->pattern_tail, p);
320 }
321
322 struct grep_opt *grep_opt_dup(const struct grep_opt *opt)
323 {
324 struct grep_pat *pat;
325 struct grep_opt *ret = xmalloc(sizeof(struct grep_opt));
326 *ret = *opt;
327
328 ret->pattern_list = NULL;
329 ret->pattern_tail = &ret->pattern_list;
330
331 for(pat = opt->pattern_list; pat != NULL; pat = pat->next)
332 {
333 if(pat->token == GREP_PATTERN_HEAD)
334 append_header_grep_pattern(ret, pat->field,
335 pat->pattern);
336 else
337 append_grep_pat(ret, pat->pattern, pat->patternlen,
338 pat->origin, pat->no, pat->token);
339 }
340
341 return ret;
342 }
343
344 static NORETURN void compile_regexp_failed(const struct grep_pat *p,
345 const char *error)
346 {
347 char where[1024];
348
349 if (p->no)
350 xsnprintf(where, sizeof(where), "In '%s' at %d, ", p->origin, p->no);
351 else if (p->origin)
352 xsnprintf(where, sizeof(where), "%s, ", p->origin);
353 else
354 where[0] = 0;
355
356 die("%s'%s': %s", where, p->pattern, error);
357 }
358
359 static int is_fixed(const char *s, size_t len)
360 {
361 size_t i;
362
363 for (i = 0; i < len; i++) {
364 if (is_regex_special(s[i]))
365 return 0;
366 }
367
368 return 1;
369 }
370
371 #ifdef USE_LIBPCRE1
372 static void compile_pcre1_regexp(struct grep_pat *p, const struct grep_opt *opt)
373 {
374 const char *error;
375 int erroffset;
376 int options = PCRE_MULTILINE;
377
378 if (opt->ignore_case) {
379 if (!opt->ignore_locale && has_non_ascii(p->pattern))
380 p->pcre1_tables = pcre_maketables();
381 options |= PCRE_CASELESS;
382 }
383 if (!opt->ignore_locale && is_utf8_locale() && has_non_ascii(p->pattern))
384 options |= PCRE_UTF8;
385
386 p->pcre1_regexp = pcre_compile(p->pattern, options, &error, &erroffset,
387 p->pcre1_tables);
388 if (!p->pcre1_regexp)
389 compile_regexp_failed(p, error);
390
391 p->pcre1_extra_info = pcre_study(p->pcre1_regexp, GIT_PCRE_STUDY_JIT_COMPILE, &error);
392 if (!p->pcre1_extra_info && error)
393 die("%s", error);
394
395 #ifdef GIT_PCRE1_USE_JIT
396 pcre_config(PCRE_CONFIG_JIT, &p->pcre1_jit_on);
397 if (opt->debug)
398 fprintf(stderr, "pcre1_jit_on=%d\n", p->pcre1_jit_on);
399 #endif
400 }
401
402 static int pcre1match(struct grep_pat *p, const char *line, const char *eol,
403 regmatch_t *match, int eflags)
404 {
405 int ovector[30], ret, flags = PCRE_NO_UTF8_CHECK;
406
407 if (eflags & REG_NOTBOL)
408 flags |= PCRE_NOTBOL;
409
410 ret = pcre_exec(p->pcre1_regexp, p->pcre1_extra_info, line,
411 eol - line, 0, flags, ovector,
412 ARRAY_SIZE(ovector));
413
414 if (ret < 0 && ret != PCRE_ERROR_NOMATCH)
415 die("pcre_exec failed with error code %d", ret);
416 if (ret > 0) {
417 ret = 0;
418 match->rm_so = ovector[0];
419 match->rm_eo = ovector[1];
420 }
421
422 return ret;
423 }
424
425 static void free_pcre1_regexp(struct grep_pat *p)
426 {
427 pcre_free(p->pcre1_regexp);
428 #ifdef GIT_PCRE1_USE_JIT
429 if (p->pcre1_jit_on)
430 pcre_free_study(p->pcre1_extra_info);
431 else
432 #endif
433 pcre_free(p->pcre1_extra_info);
434 pcre_free((void *)p->pcre1_tables);
435 }
436 #else /* !USE_LIBPCRE1 */
437 static void compile_pcre1_regexp(struct grep_pat *p, const struct grep_opt *opt)
438 {
439 die("cannot use Perl-compatible regexes when not compiled with USE_LIBPCRE");
440 }
441
442 static int pcre1match(struct grep_pat *p, const char *line, const char *eol,
443 regmatch_t *match, int eflags)
444 {
445 return 1;
446 }
447
448 static void free_pcre1_regexp(struct grep_pat *p)
449 {
450 }
451 #endif /* !USE_LIBPCRE1 */
452
453 #ifdef USE_LIBPCRE2
454 static void compile_pcre2_pattern(struct grep_pat *p, const struct grep_opt *opt)
455 {
456 int error;
457 PCRE2_UCHAR errbuf[256];
458 PCRE2_SIZE erroffset;
459 int options = PCRE2_MULTILINE;
460 const uint8_t *character_tables = NULL;
461 int jitret;
462 int patinforet;
463 size_t jitsizearg;
464
465 assert(opt->pcre2);
466
467 p->pcre2_compile_context = NULL;
468
469 if (opt->ignore_case) {
470 if (!opt->ignore_locale && has_non_ascii(p->pattern)) {
471 character_tables = pcre2_maketables(NULL);
472 p->pcre2_compile_context = pcre2_compile_context_create(NULL);
473 pcre2_set_character_tables(p->pcre2_compile_context, character_tables);
474 }
475 options |= PCRE2_CASELESS;
476 }
477 if (!opt->ignore_locale && is_utf8_locale() && has_non_ascii(p->pattern) &&
478 !(!opt->ignore_case && (p->fixed || p->is_fixed)))
479 options |= PCRE2_UTF;
480
481 p->pcre2_pattern = pcre2_compile((PCRE2_SPTR)p->pattern,
482 p->patternlen, options, &error, &erroffset,
483 p->pcre2_compile_context);
484
485 if (p->pcre2_pattern) {
486 p->pcre2_match_data = pcre2_match_data_create_from_pattern(p->pcre2_pattern, NULL);
487 if (!p->pcre2_match_data)
488 die("Couldn't allocate PCRE2 match data");
489 } else {
490 pcre2_get_error_message(error, errbuf, sizeof(errbuf));
491 compile_regexp_failed(p, (const char *)&errbuf);
492 }
493
494 pcre2_config(PCRE2_CONFIG_JIT, &p->pcre2_jit_on);
495 if (opt->debug)
496 fprintf(stderr, "pcre2_jit_on=%d\n", p->pcre2_jit_on);
497 if (p->pcre2_jit_on) {
498 jitret = pcre2_jit_compile(p->pcre2_pattern, PCRE2_JIT_COMPLETE);
499 if (jitret)
500 die("Couldn't JIT the PCRE2 pattern '%s', got '%d'\n", p->pattern, jitret);
501
502 /*
503 * The pcre2_config(PCRE2_CONFIG_JIT, ...) call just
504 * tells us whether the library itself supports JIT,
505 * but to see whether we're going to be actually using
506 * JIT we need to extract PCRE2_INFO_JITSIZE from the
507 * pattern *after* we do pcre2_jit_compile() above.
508 *
509 * This is because if the pattern contains the
510 * (*NO_JIT) verb (see pcre2syntax(3))
511 * pcre2_jit_compile() will exit early with 0. If we
512 * then proceed to call pcre2_jit_match() further down
513 * the line instead of pcre2_match() we'll either
514 * segfault (pre PCRE 10.31) or run into a fatal error
515 * (post PCRE2 10.31)
516 */
517 patinforet = pcre2_pattern_info(p->pcre2_pattern, PCRE2_INFO_JITSIZE, &jitsizearg);
518 if (patinforet)
519 BUG("pcre2_pattern_info() failed: %d", patinforet);
520 if (jitsizearg == 0) {
521 p->pcre2_jit_on = 0;
522 if (opt->debug)
523 fprintf(stderr, "pcre2_jit_on=%d: (*NO_JIT) in regex\n",
524 p->pcre2_jit_on);
525 return;
526 }
527 }
528 }
529
530 static int pcre2match(struct grep_pat *p, const char *line, const char *eol,
531 regmatch_t *match, int eflags)
532 {
533 int ret, flags = 0;
534 PCRE2_SIZE *ovector;
535 PCRE2_UCHAR errbuf[256];
536
537 if (eflags & REG_NOTBOL)
538 flags |= PCRE2_NOTBOL;
539
540 if (p->pcre2_jit_on)
541 ret = pcre2_jit_match(p->pcre2_pattern, (unsigned char *)line,
542 eol - line, 0, flags, p->pcre2_match_data,
543 NULL);
544 else
545 ret = pcre2_match(p->pcre2_pattern, (unsigned char *)line,
546 eol - line, 0, flags, p->pcre2_match_data,
547 NULL);
548
549 if (ret < 0 && ret != PCRE2_ERROR_NOMATCH) {
550 pcre2_get_error_message(ret, errbuf, sizeof(errbuf));
551 die("%s failed with error code %d: %s",
552 (p->pcre2_jit_on ? "pcre2_jit_match" : "pcre2_match"), ret,
553 errbuf);
554 }
555 if (ret > 0) {
556 ovector = pcre2_get_ovector_pointer(p->pcre2_match_data);
557 ret = 0;
558 match->rm_so = (int)ovector[0];
559 match->rm_eo = (int)ovector[1];
560 }
561
562 return ret;
563 }
564
565 static void free_pcre2_pattern(struct grep_pat *p)
566 {
567 pcre2_compile_context_free(p->pcre2_compile_context);
568 pcre2_code_free(p->pcre2_pattern);
569 pcre2_match_data_free(p->pcre2_match_data);
570 }
571 #else /* !USE_LIBPCRE2 */
572 static void compile_pcre2_pattern(struct grep_pat *p, const struct grep_opt *opt)
573 {
574 /*
575 * Unreachable until USE_LIBPCRE2 becomes synonymous with
576 * USE_LIBPCRE. See the sibling comment in
577 * grep_set_pattern_type_option().
578 */
579 die("cannot use Perl-compatible regexes when not compiled with USE_LIBPCRE");
580 }
581
582 static int pcre2match(struct grep_pat *p, const char *line, const char *eol,
583 regmatch_t *match, int eflags)
584 {
585 return 1;
586 }
587
588 static void free_pcre2_pattern(struct grep_pat *p)
589 {
590 }
591
592 static void compile_fixed_regexp(struct grep_pat *p, struct grep_opt *opt)
593 {
594 struct strbuf sb = STRBUF_INIT;
595 int err;
596 int regflags = 0;
597
598 basic_regex_quote_buf(&sb, p->pattern);
599 if (opt->ignore_case)
600 regflags |= REG_ICASE;
601 err = regcomp(&p->regexp, sb.buf, regflags);
602 if (opt->debug)
603 fprintf(stderr, "fixed %s\n", sb.buf);
604 strbuf_release(&sb);
605 if (err) {
606 char errbuf[1024];
607 regerror(err, &p->regexp, errbuf, sizeof(errbuf));
608 compile_regexp_failed(p, errbuf);
609 }
610 }
611 #endif /* !USE_LIBPCRE2 */
612
613 static void compile_regexp(struct grep_pat *p, struct grep_opt *opt)
614 {
615 int err;
616 int regflags = REG_NEWLINE;
617
618 p->word_regexp = opt->word_regexp;
619 p->ignore_case = opt->ignore_case;
620 p->fixed = opt->fixed;
621
622 if (memchr(p->pattern, 0, p->patternlen) && !opt->pcre2)
623 die(_("given pattern contains NULL byte (via -f <file>). This is only supported with -P under PCRE v2"));
624
625 p->is_fixed = is_fixed(p->pattern, p->patternlen);
626 #ifdef USE_LIBPCRE2
627 if (!p->fixed && !p->is_fixed) {
628 const char *no_jit = "(*NO_JIT)";
629 const int no_jit_len = strlen(no_jit);
630 if (starts_with(p->pattern, no_jit) &&
631 is_fixed(p->pattern + no_jit_len,
632 p->patternlen - no_jit_len))
633 p->is_fixed = 1;
634 }
635 #endif
636 if (p->fixed || p->is_fixed) {
637 #ifdef USE_LIBPCRE2
638 opt->pcre2 = 1;
639 if (p->is_fixed) {
640 compile_pcre2_pattern(p, opt);
641 } else {
642 /*
643 * E.g. t7811-grep-open.sh relies on the
644 * pattern being restored.
645 */
646 char *old_pattern = p->pattern;
647 size_t old_patternlen = p->patternlen;
648 struct strbuf sb = STRBUF_INIT;
649
650 /*
651 * There is the PCRE2_LITERAL flag, but it's
652 * only in PCRE v2 10.30 and later. Needing to
653 * ifdef our way around that and dealing with
654 * it + PCRE2_MULTILINE being an error is more
655 * complex than just quoting this ourselves.
656 */
657 strbuf_add(&sb, "\\Q", 2);
658 strbuf_add(&sb, p->pattern, p->patternlen);
659 strbuf_add(&sb, "\\E", 2);
660
661 p->pattern = sb.buf;
662 p->patternlen = sb.len;
663 compile_pcre2_pattern(p, opt);
664 p->pattern = old_pattern;
665 p->patternlen = old_patternlen;
666 strbuf_release(&sb);
667 }
668 #else /* !USE_LIBPCRE2 */
669 compile_fixed_regexp(p, opt);
670 #endif /* !USE_LIBPCRE2 */
671 return;
672 }
673
674 if (opt->pcre2) {
675 compile_pcre2_pattern(p, opt);
676 return;
677 }
678
679 if (opt->pcre1) {
680 compile_pcre1_regexp(p, opt);
681 return;
682 }
683
684 if (p->ignore_case)
685 regflags |= REG_ICASE;
686 if (opt->extended_regexp_option)
687 regflags |= REG_EXTENDED;
688 err = regcomp(&p->regexp, p->pattern, regflags);
689 if (err) {
690 char errbuf[1024];
691 regerror(err, &p->regexp, errbuf, 1024);
692 compile_regexp_failed(p, errbuf);
693 }
694 }
695
696 static struct grep_expr *compile_pattern_or(struct grep_pat **);
697 static struct grep_expr *compile_pattern_atom(struct grep_pat **list)
698 {
699 struct grep_pat *p;
700 struct grep_expr *x;
701
702 p = *list;
703 if (!p)
704 return NULL;
705 switch (p->token) {
706 case GREP_PATTERN: /* atom */
707 case GREP_PATTERN_HEAD:
708 case GREP_PATTERN_BODY:
709 x = xcalloc(1, sizeof (struct grep_expr));
710 x->node = GREP_NODE_ATOM;
711 x->u.atom = p;
712 *list = p->next;
713 return x;
714 case GREP_OPEN_PAREN:
715 *list = p->next;
716 x = compile_pattern_or(list);
717 if (!*list || (*list)->token != GREP_CLOSE_PAREN)
718 die("unmatched parenthesis");
719 *list = (*list)->next;
720 return x;
721 default:
722 return NULL;
723 }
724 }
725
726 static struct grep_expr *compile_pattern_not(struct grep_pat **list)
727 {
728 struct grep_pat *p;
729 struct grep_expr *x;
730
731 p = *list;
732 if (!p)
733 return NULL;
734 switch (p->token) {
735 case GREP_NOT:
736 if (!p->next)
737 die("--not not followed by pattern expression");
738 *list = p->next;
739 x = xcalloc(1, sizeof (struct grep_expr));
740 x->node = GREP_NODE_NOT;
741 x->u.unary = compile_pattern_not(list);
742 if (!x->u.unary)
743 die("--not followed by non pattern expression");
744 return x;
745 default:
746 return compile_pattern_atom(list);
747 }
748 }
749
750 static struct grep_expr *compile_pattern_and(struct grep_pat **list)
751 {
752 struct grep_pat *p;
753 struct grep_expr *x, *y, *z;
754
755 x = compile_pattern_not(list);
756 p = *list;
757 if (p && p->token == GREP_AND) {
758 if (!p->next)
759 die("--and not followed by pattern expression");
760 *list = p->next;
761 y = compile_pattern_and(list);
762 if (!y)
763 die("--and not followed by pattern expression");
764 z = xcalloc(1, sizeof (struct grep_expr));
765 z->node = GREP_NODE_AND;
766 z->u.binary.left = x;
767 z->u.binary.right = y;
768 return z;
769 }
770 return x;
771 }
772
773 static struct grep_expr *compile_pattern_or(struct grep_pat **list)
774 {
775 struct grep_pat *p;
776 struct grep_expr *x, *y, *z;
777
778 x = compile_pattern_and(list);
779 p = *list;
780 if (x && p && p->token != GREP_CLOSE_PAREN) {
781 y = compile_pattern_or(list);
782 if (!y)
783 die("not a pattern expression %s", p->pattern);
784 z = xcalloc(1, sizeof (struct grep_expr));
785 z->node = GREP_NODE_OR;
786 z->u.binary.left = x;
787 z->u.binary.right = y;
788 return z;
789 }
790 return x;
791 }
792
793 static struct grep_expr *compile_pattern_expr(struct grep_pat **list)
794 {
795 return compile_pattern_or(list);
796 }
797
798 static void indent(int in)
799 {
800 while (in-- > 0)
801 fputc(' ', stderr);
802 }
803
804 static void dump_grep_pat(struct grep_pat *p)
805 {
806 switch (p->token) {
807 case GREP_AND: fprintf(stderr, "*and*"); break;
808 case GREP_OPEN_PAREN: fprintf(stderr, "*(*"); break;
809 case GREP_CLOSE_PAREN: fprintf(stderr, "*)*"); break;
810 case GREP_NOT: fprintf(stderr, "*not*"); break;
811 case GREP_OR: fprintf(stderr, "*or*"); break;
812
813 case GREP_PATTERN: fprintf(stderr, "pattern"); break;
814 case GREP_PATTERN_HEAD: fprintf(stderr, "pattern_head"); break;
815 case GREP_PATTERN_BODY: fprintf(stderr, "pattern_body"); break;
816 }
817
818 switch (p->token) {
819 default: break;
820 case GREP_PATTERN_HEAD:
821 fprintf(stderr, "<head %d>", p->field); break;
822 case GREP_PATTERN_BODY:
823 fprintf(stderr, "<body>"); break;
824 }
825 switch (p->token) {
826 default: break;
827 case GREP_PATTERN_HEAD:
828 case GREP_PATTERN_BODY:
829 case GREP_PATTERN:
830 fprintf(stderr, "%.*s", (int)p->patternlen, p->pattern);
831 break;
832 }
833 fputc('\n', stderr);
834 }
835
836 static void dump_grep_expression_1(struct grep_expr *x, int in)
837 {
838 indent(in);
839 switch (x->node) {
840 case GREP_NODE_TRUE:
841 fprintf(stderr, "true\n");
842 break;
843 case GREP_NODE_ATOM:
844 dump_grep_pat(x->u.atom);
845 break;
846 case GREP_NODE_NOT:
847 fprintf(stderr, "(not\n");
848 dump_grep_expression_1(x->u.unary, in+1);
849 indent(in);
850 fprintf(stderr, ")\n");
851 break;
852 case GREP_NODE_AND:
853 fprintf(stderr, "(and\n");
854 dump_grep_expression_1(x->u.binary.left, in+1);
855 dump_grep_expression_1(x->u.binary.right, in+1);
856 indent(in);
857 fprintf(stderr, ")\n");
858 break;
859 case GREP_NODE_OR:
860 fprintf(stderr, "(or\n");
861 dump_grep_expression_1(x->u.binary.left, in+1);
862 dump_grep_expression_1(x->u.binary.right, in+1);
863 indent(in);
864 fprintf(stderr, ")\n");
865 break;
866 }
867 }
868
869 static void dump_grep_expression(struct grep_opt *opt)
870 {
871 struct grep_expr *x = opt->pattern_expression;
872
873 if (opt->all_match)
874 fprintf(stderr, "[all-match]\n");
875 dump_grep_expression_1(x, 0);
876 fflush(NULL);
877 }
878
879 static struct grep_expr *grep_true_expr(void)
880 {
881 struct grep_expr *z = xcalloc(1, sizeof(*z));
882 z->node = GREP_NODE_TRUE;
883 return z;
884 }
885
886 static struct grep_expr *grep_or_expr(struct grep_expr *left, struct grep_expr *right)
887 {
888 struct grep_expr *z = xcalloc(1, sizeof(*z));
889 z->node = GREP_NODE_OR;
890 z->u.binary.left = left;
891 z->u.binary.right = right;
892 return z;
893 }
894
895 static struct grep_expr *prep_header_patterns(struct grep_opt *opt)
896 {
897 struct grep_pat *p;
898 struct grep_expr *header_expr;
899 struct grep_expr *(header_group[GREP_HEADER_FIELD_MAX]);
900 enum grep_header_field fld;
901
902 if (!opt->header_list)
903 return NULL;
904
905 for (p = opt->header_list; p; p = p->next) {
906 if (p->token != GREP_PATTERN_HEAD)
907 BUG("a non-header pattern in grep header list.");
908 if (p->field < GREP_HEADER_FIELD_MIN ||
909 GREP_HEADER_FIELD_MAX <= p->field)
910 BUG("unknown header field %d", p->field);
911 compile_regexp(p, opt);
912 }
913
914 for (fld = 0; fld < GREP_HEADER_FIELD_MAX; fld++)
915 header_group[fld] = NULL;
916
917 for (p = opt->header_list; p; p = p->next) {
918 struct grep_expr *h;
919 struct grep_pat *pp = p;
920
921 h = compile_pattern_atom(&pp);
922 if (!h || pp != p->next)
923 BUG("malformed header expr");
924 if (!header_group[p->field]) {
925 header_group[p->field] = h;
926 continue;
927 }
928 header_group[p->field] = grep_or_expr(h, header_group[p->field]);
929 }
930
931 header_expr = NULL;
932
933 for (fld = 0; fld < GREP_HEADER_FIELD_MAX; fld++) {
934 if (!header_group[fld])
935 continue;
936 if (!header_expr)
937 header_expr = grep_true_expr();
938 header_expr = grep_or_expr(header_group[fld], header_expr);
939 }
940 return header_expr;
941 }
942
943 static struct grep_expr *grep_splice_or(struct grep_expr *x, struct grep_expr *y)
944 {
945 struct grep_expr *z = x;
946
947 while (x) {
948 assert(x->node == GREP_NODE_OR);
949 if (x->u.binary.right &&
950 x->u.binary.right->node == GREP_NODE_TRUE) {
951 x->u.binary.right = y;
952 break;
953 }
954 x = x->u.binary.right;
955 }
956 return z;
957 }
958
959 static void compile_grep_patterns_real(struct grep_opt *opt)
960 {
961 struct grep_pat *p;
962 struct grep_expr *header_expr = prep_header_patterns(opt);
963
964 for (p = opt->pattern_list; p; p = p->next) {
965 switch (p->token) {
966 case GREP_PATTERN: /* atom */
967 case GREP_PATTERN_HEAD:
968 case GREP_PATTERN_BODY:
969 compile_regexp(p, opt);
970 break;
971 default:
972 opt->extended = 1;
973 break;
974 }
975 }
976
977 if (opt->all_match || header_expr)
978 opt->extended = 1;
979 else if (!opt->extended && !opt->debug)
980 return;
981
982 p = opt->pattern_list;
983 if (p)
984 opt->pattern_expression = compile_pattern_expr(&p);
985 if (p)
986 die("incomplete pattern expression: %s", p->pattern);
987
988 if (!header_expr)
989 return;
990
991 if (!opt->pattern_expression)
992 opt->pattern_expression = header_expr;
993 else if (opt->all_match)
994 opt->pattern_expression = grep_splice_or(header_expr,
995 opt->pattern_expression);
996 else
997 opt->pattern_expression = grep_or_expr(opt->pattern_expression,
998 header_expr);
999 opt->all_match = 1;
1000 }
1001
1002 void compile_grep_patterns(struct grep_opt *opt)
1003 {
1004 compile_grep_patterns_real(opt);
1005 if (opt->debug)
1006 dump_grep_expression(opt);
1007 }
1008
1009 static void free_pattern_expr(struct grep_expr *x)
1010 {
1011 switch (x->node) {
1012 case GREP_NODE_TRUE:
1013 case GREP_NODE_ATOM:
1014 break;
1015 case GREP_NODE_NOT:
1016 free_pattern_expr(x->u.unary);
1017 break;
1018 case GREP_NODE_AND:
1019 case GREP_NODE_OR:
1020 free_pattern_expr(x->u.binary.left);
1021 free_pattern_expr(x->u.binary.right);
1022 break;
1023 }
1024 free(x);
1025 }
1026
1027 void free_grep_patterns(struct grep_opt *opt)
1028 {
1029 struct grep_pat *p, *n;
1030
1031 for (p = opt->pattern_list; p; p = n) {
1032 n = p->next;
1033 switch (p->token) {
1034 case GREP_PATTERN: /* atom */
1035 case GREP_PATTERN_HEAD:
1036 case GREP_PATTERN_BODY:
1037 if (p->pcre1_regexp)
1038 free_pcre1_regexp(p);
1039 else if (p->pcre2_pattern)
1040 free_pcre2_pattern(p);
1041 else
1042 regfree(&p->regexp);
1043 free(p->pattern);
1044 break;
1045 default:
1046 break;
1047 }
1048 free(p);
1049 }
1050
1051 if (!opt->extended)
1052 return;
1053 free_pattern_expr(opt->pattern_expression);
1054 }
1055
1056 static char *end_of_line(char *cp, unsigned long *left)
1057 {
1058 unsigned long l = *left;
1059 while (l && *cp != '\n') {
1060 l--;
1061 cp++;
1062 }
1063 *left = l;
1064 return cp;
1065 }
1066
1067 static int word_char(char ch)
1068 {
1069 return isalnum(ch) || ch == '_';
1070 }
1071
1072 static void output_color(struct grep_opt *opt, const void *data, size_t size,
1073 const char *color)
1074 {
1075 if (want_color(opt->color) && color && color[0]) {
1076 opt->output(opt, color, strlen(color));
1077 opt->output(opt, data, size);
1078 opt->output(opt, GIT_COLOR_RESET, strlen(GIT_COLOR_RESET));
1079 } else
1080 opt->output(opt, data, size);
1081 }
1082
1083 static void output_sep(struct grep_opt *opt, char sign)
1084 {
1085 if (opt->null_following_name)
1086 opt->output(opt, "\0", 1);
1087 else
1088 output_color(opt, &sign, 1, opt->colors[GREP_COLOR_SEP]);
1089 }
1090
1091 static void show_name(struct grep_opt *opt, const char *name)
1092 {
1093 output_color(opt, name, strlen(name), opt->colors[GREP_COLOR_FILENAME]);
1094 opt->output(opt, opt->null_following_name ? "\0" : "\n", 1);
1095 }
1096
1097 static int patmatch(struct grep_pat *p, char *line, char *eol,
1098 regmatch_t *match, int eflags)
1099 {
1100 int hit;
1101
1102 if (p->pcre1_regexp)
1103 hit = !pcre1match(p, line, eol, match, eflags);
1104 else if (p->pcre2_pattern)
1105 hit = !pcre2match(p, line, eol, match, eflags);
1106 else
1107 hit = !regexec_buf(&p->regexp, line, eol - line, 1, match,
1108 eflags);
1109
1110 return hit;
1111 }
1112
1113 static int strip_timestamp(char *bol, char **eol_p)
1114 {
1115 char *eol = *eol_p;
1116 int ch;
1117
1118 while (bol < --eol) {
1119 if (*eol != '>')
1120 continue;
1121 *eol_p = ++eol;
1122 ch = *eol;
1123 *eol = '\0';
1124 return ch;
1125 }
1126 return 0;
1127 }
1128
1129 static struct {
1130 const char *field;
1131 size_t len;
1132 } header_field[] = {
1133 { "author ", 7 },
1134 { "committer ", 10 },
1135 { "reflog ", 7 },
1136 };
1137
1138 static int match_one_pattern(struct grep_pat *p, char *bol, char *eol,
1139 enum grep_context ctx,
1140 regmatch_t *pmatch, int eflags)
1141 {
1142 int hit = 0;
1143 int saved_ch = 0;
1144 const char *start = bol;
1145
1146 if ((p->token != GREP_PATTERN) &&
1147 ((p->token == GREP_PATTERN_HEAD) != (ctx == GREP_CONTEXT_HEAD)))
1148 return 0;
1149
1150 if (p->token == GREP_PATTERN_HEAD) {
1151 const char *field;
1152 size_t len;
1153 assert(p->field < ARRAY_SIZE(header_field));
1154 field = header_field[p->field].field;
1155 len = header_field[p->field].len;
1156 if (strncmp(bol, field, len))
1157 return 0;
1158 bol += len;
1159 switch (p->field) {
1160 case GREP_HEADER_AUTHOR:
1161 case GREP_HEADER_COMMITTER:
1162 saved_ch = strip_timestamp(bol, &eol);
1163 break;
1164 default:
1165 break;
1166 }
1167 }
1168
1169 again:
1170 hit = patmatch(p, bol, eol, pmatch, eflags);
1171
1172 if (hit && p->word_regexp) {
1173 if ((pmatch[0].rm_so < 0) ||
1174 (eol - bol) < pmatch[0].rm_so ||
1175 (pmatch[0].rm_eo < 0) ||
1176 (eol - bol) < pmatch[0].rm_eo)
1177 die("regexp returned nonsense");
1178
1179 /* Match beginning must be either beginning of the
1180 * line, or at word boundary (i.e. the last char must
1181 * not be a word char). Similarly, match end must be
1182 * either end of the line, or at word boundary
1183 * (i.e. the next char must not be a word char).
1184 */
1185 if ( ((pmatch[0].rm_so == 0) ||
1186 !word_char(bol[pmatch[0].rm_so-1])) &&
1187 ((pmatch[0].rm_eo == (eol-bol)) ||
1188 !word_char(bol[pmatch[0].rm_eo])) )
1189 ;
1190 else
1191 hit = 0;
1192
1193 /* Words consist of at least one character. */
1194 if (pmatch->rm_so == pmatch->rm_eo)
1195 hit = 0;
1196
1197 if (!hit && pmatch[0].rm_so + bol + 1 < eol) {
1198 /* There could be more than one match on the
1199 * line, and the first match might not be
1200 * strict word match. But later ones could be!
1201 * Forward to the next possible start, i.e. the
1202 * next position following a non-word char.
1203 */
1204 bol = pmatch[0].rm_so + bol + 1;
1205 while (word_char(bol[-1]) && bol < eol)
1206 bol++;
1207 eflags |= REG_NOTBOL;
1208 if (bol < eol)
1209 goto again;
1210 }
1211 }
1212 if (p->token == GREP_PATTERN_HEAD && saved_ch)
1213 *eol = saved_ch;
1214 if (hit) {
1215 pmatch[0].rm_so += bol - start;
1216 pmatch[0].rm_eo += bol - start;
1217 }
1218 return hit;
1219 }
1220
1221 static int match_expr_eval(struct grep_opt *opt, struct grep_expr *x, char *bol,
1222 char *eol, enum grep_context ctx, ssize_t *col,
1223 ssize_t *icol, int collect_hits)
1224 {
1225 int h = 0;
1226
1227 if (!x)
1228 die("Not a valid grep expression");
1229 switch (x->node) {
1230 case GREP_NODE_TRUE:
1231 h = 1;
1232 break;
1233 case GREP_NODE_ATOM:
1234 {
1235 regmatch_t tmp;
1236 h = match_one_pattern(x->u.atom, bol, eol, ctx,
1237 &tmp, 0);
1238 if (h && (*col < 0 || tmp.rm_so < *col))
1239 *col = tmp.rm_so;
1240 }
1241 break;
1242 case GREP_NODE_NOT:
1243 /*
1244 * Upon visiting a GREP_NODE_NOT, col and icol become swapped.
1245 */
1246 h = !match_expr_eval(opt, x->u.unary, bol, eol, ctx, icol, col,
1247 0);
1248 break;
1249 case GREP_NODE_AND:
1250 h = match_expr_eval(opt, x->u.binary.left, bol, eol, ctx, col,
1251 icol, 0);
1252 if (h || opt->columnnum) {
1253 /*
1254 * Don't short-circuit AND when given --column, since a
1255 * NOT earlier in the tree may turn this into an OR. In
1256 * this case, see the below comment.
1257 */
1258 h &= match_expr_eval(opt, x->u.binary.right, bol, eol,
1259 ctx, col, icol, 0);
1260 }
1261 break;
1262 case GREP_NODE_OR:
1263 if (!(collect_hits || opt->columnnum)) {
1264 /*
1265 * Don't short-circuit OR when given --column (or
1266 * collecting hits) to ensure we don't skip a later
1267 * child that would produce an earlier match.
1268 */
1269 return (match_expr_eval(opt, x->u.binary.left, bol, eol,
1270 ctx, col, icol, 0) ||
1271 match_expr_eval(opt, x->u.binary.right, bol,
1272 eol, ctx, col, icol, 0));
1273 }
1274 h = match_expr_eval(opt, x->u.binary.left, bol, eol, ctx, col,
1275 icol, 0);
1276 if (collect_hits)
1277 x->u.binary.left->hit |= h;
1278 h |= match_expr_eval(opt, x->u.binary.right, bol, eol, ctx, col,
1279 icol, collect_hits);
1280 break;
1281 default:
1282 die("Unexpected node type (internal error) %d", x->node);
1283 }
1284 if (collect_hits)
1285 x->hit |= h;
1286 return h;
1287 }
1288
1289 static int match_expr(struct grep_opt *opt, char *bol, char *eol,
1290 enum grep_context ctx, ssize_t *col,
1291 ssize_t *icol, int collect_hits)
1292 {
1293 struct grep_expr *x = opt->pattern_expression;
1294 return match_expr_eval(opt, x, bol, eol, ctx, col, icol, collect_hits);
1295 }
1296
1297 static int match_line(struct grep_opt *opt, char *bol, char *eol,
1298 ssize_t *col, ssize_t *icol,
1299 enum grep_context ctx, int collect_hits)
1300 {
1301 struct grep_pat *p;
1302 int hit = 0;
1303
1304 if (opt->extended)
1305 return match_expr(opt, bol, eol, ctx, col, icol,
1306 collect_hits);
1307
1308 /* we do not call with collect_hits without being extended */
1309 for (p = opt->pattern_list; p; p = p->next) {
1310 regmatch_t tmp;
1311 if (match_one_pattern(p, bol, eol, ctx, &tmp, 0)) {
1312 hit |= 1;
1313 if (!opt->columnnum) {
1314 /*
1315 * Without --column, any single match on a line
1316 * is enough to know that it needs to be
1317 * printed. With --column, scan _all_ patterns
1318 * to find the earliest.
1319 */
1320 break;
1321 }
1322 if (*col < 0 || tmp.rm_so < *col)
1323 *col = tmp.rm_so;
1324 }
1325 }
1326 return hit;
1327 }
1328
1329 static int match_next_pattern(struct grep_pat *p, char *bol, char *eol,
1330 enum grep_context ctx,
1331 regmatch_t *pmatch, int eflags)
1332 {
1333 regmatch_t match;
1334
1335 if (!match_one_pattern(p, bol, eol, ctx, &match, eflags))
1336 return 0;
1337 if (match.rm_so < 0 || match.rm_eo < 0)
1338 return 0;
1339 if (pmatch->rm_so >= 0 && pmatch->rm_eo >= 0) {
1340 if (match.rm_so > pmatch->rm_so)
1341 return 1;
1342 if (match.rm_so == pmatch->rm_so && match.rm_eo < pmatch->rm_eo)
1343 return 1;
1344 }
1345 pmatch->rm_so = match.rm_so;
1346 pmatch->rm_eo = match.rm_eo;
1347 return 1;
1348 }
1349
1350 static int next_match(struct grep_opt *opt, char *bol, char *eol,
1351 enum grep_context ctx, regmatch_t *pmatch, int eflags)
1352 {
1353 struct grep_pat *p;
1354 int hit = 0;
1355
1356 pmatch->rm_so = pmatch->rm_eo = -1;
1357 if (bol < eol) {
1358 for (p = opt->pattern_list; p; p = p->next) {
1359 switch (p->token) {
1360 case GREP_PATTERN: /* atom */
1361 case GREP_PATTERN_HEAD:
1362 case GREP_PATTERN_BODY:
1363 hit |= match_next_pattern(p, bol, eol, ctx,
1364 pmatch, eflags);
1365 break;
1366 default:
1367 break;
1368 }
1369 }
1370 }
1371 return hit;
1372 }
1373
1374 static void show_line_header(struct grep_opt *opt, const char *name,
1375 unsigned lno, ssize_t cno, char sign)
1376 {
1377 if (opt->heading && opt->last_shown == 0) {
1378 output_color(opt, name, strlen(name), opt->colors[GREP_COLOR_FILENAME]);
1379 opt->output(opt, "\n", 1);
1380 }
1381 opt->last_shown = lno;
1382
1383 if (!opt->heading && opt->pathname) {
1384 output_color(opt, name, strlen(name), opt->colors[GREP_COLOR_FILENAME]);
1385 output_sep(opt, sign);
1386 }
1387 if (opt->linenum) {
1388 char buf[32];
1389 xsnprintf(buf, sizeof(buf), "%d", lno);
1390 output_color(opt, buf, strlen(buf), opt->colors[GREP_COLOR_LINENO]);
1391 output_sep(opt, sign);
1392 }
1393 /*
1394 * Treat 'cno' as the 1-indexed offset from the start of a non-context
1395 * line to its first match. Otherwise, 'cno' is 0 indicating that we are
1396 * being called with a context line.
1397 */
1398 if (opt->columnnum && cno) {
1399 char buf[32];
1400 xsnprintf(buf, sizeof(buf), "%"PRIuMAX, (uintmax_t)cno);
1401 output_color(opt, buf, strlen(buf), opt->colors[GREP_COLOR_COLUMNNO]);
1402 output_sep(opt, sign);
1403 }
1404 }
1405
1406 static void show_line(struct grep_opt *opt, char *bol, char *eol,
1407 const char *name, unsigned lno, ssize_t cno, char sign)
1408 {
1409 int rest = eol - bol;
1410 const char *match_color = NULL;
1411 const char *line_color = NULL;
1412
1413 if (opt->file_break && opt->last_shown == 0) {
1414 if (opt->show_hunk_mark)
1415 opt->output(opt, "\n", 1);
1416 } else if (opt->pre_context || opt->post_context || opt->funcbody) {
1417 if (opt->last_shown == 0) {
1418 if (opt->show_hunk_mark) {
1419 output_color(opt, "--", 2, opt->colors[GREP_COLOR_SEP]);
1420 opt->output(opt, "\n", 1);
1421 }
1422 } else if (lno > opt->last_shown + 1) {
1423 output_color(opt, "--", 2, opt->colors[GREP_COLOR_SEP]);
1424 opt->output(opt, "\n", 1);
1425 }
1426 }
1427 if (!opt->only_matching) {
1428 /*
1429 * In case the line we're being called with contains more than
1430 * one match, leave printing each header to the loop below.
1431 */
1432 show_line_header(opt, name, lno, cno, sign);
1433 }
1434 if (opt->color || opt->only_matching) {
1435 regmatch_t match;
1436 enum grep_context ctx = GREP_CONTEXT_BODY;
1437 int ch = *eol;
1438 int eflags = 0;
1439
1440 if (opt->color) {
1441 if (sign == ':')
1442 match_color = opt->colors[GREP_COLOR_MATCH_SELECTED];
1443 else
1444 match_color = opt->colors[GREP_COLOR_MATCH_CONTEXT];
1445 if (sign == ':')
1446 line_color = opt->colors[GREP_COLOR_SELECTED];
1447 else if (sign == '-')
1448 line_color = opt->colors[GREP_COLOR_CONTEXT];
1449 else if (sign == '=')
1450 line_color = opt->colors[GREP_COLOR_FUNCTION];
1451 }
1452 *eol = '\0';
1453 while (next_match(opt, bol, eol, ctx, &match, eflags)) {
1454 if (match.rm_so == match.rm_eo)
1455 break;
1456
1457 if (opt->only_matching)
1458 show_line_header(opt, name, lno, cno, sign);
1459 else
1460 output_color(opt, bol, match.rm_so, line_color);
1461 output_color(opt, bol + match.rm_so,
1462 match.rm_eo - match.rm_so, match_color);
1463 if (opt->only_matching)
1464 opt->output(opt, "\n", 1);
1465 bol += match.rm_eo;
1466 cno += match.rm_eo;
1467 rest -= match.rm_eo;
1468 eflags = REG_NOTBOL;
1469 }
1470 *eol = ch;
1471 }
1472 if (!opt->only_matching) {
1473 output_color(opt, bol, rest, line_color);
1474 opt->output(opt, "\n", 1);
1475 }
1476 }
1477
1478 int grep_use_locks;
1479
1480 /*
1481 * This lock protects access to the gitattributes machinery, which is
1482 * not thread-safe.
1483 */
1484 pthread_mutex_t grep_attr_mutex;
1485
1486 static inline void grep_attr_lock(void)
1487 {
1488 if (grep_use_locks)
1489 pthread_mutex_lock(&grep_attr_mutex);
1490 }
1491
1492 static inline void grep_attr_unlock(void)
1493 {
1494 if (grep_use_locks)
1495 pthread_mutex_unlock(&grep_attr_mutex);
1496 }
1497
1498 /*
1499 * Same as git_attr_mutex, but protecting the thread-unsafe object db access.
1500 */
1501 pthread_mutex_t grep_read_mutex;
1502
1503 static int match_funcname(struct grep_opt *opt, struct grep_source *gs, char *bol, char *eol)
1504 {
1505 xdemitconf_t *xecfg = opt->priv;
1506 if (xecfg && !xecfg->find_func) {
1507 grep_source_load_driver(gs, opt->repo->index);
1508 if (gs->driver->funcname.pattern) {
1509 const struct userdiff_funcname *pe = &gs->driver->funcname;
1510 xdiff_set_find_func(xecfg, pe->pattern, pe->cflags);
1511 } else {
1512 xecfg = opt->priv = NULL;
1513 }
1514 }
1515
1516 if (xecfg) {
1517 char buf[1];
1518 return xecfg->find_func(bol, eol - bol, buf, 1,
1519 xecfg->find_func_priv) >= 0;
1520 }
1521
1522 if (bol == eol)
1523 return 0;
1524 if (isalpha(*bol) || *bol == '_' || *bol == '$')
1525 return 1;
1526 return 0;
1527 }
1528
1529 static void show_funcname_line(struct grep_opt *opt, struct grep_source *gs,
1530 char *bol, unsigned lno)
1531 {
1532 while (bol > gs->buf) {
1533 char *eol = --bol;
1534
1535 while (bol > gs->buf && bol[-1] != '\n')
1536 bol--;
1537 lno--;
1538
1539 if (lno <= opt->last_shown)
1540 break;
1541
1542 if (match_funcname(opt, gs, bol, eol)) {
1543 show_line(opt, bol, eol, gs->name, lno, 0, '=');
1544 break;
1545 }
1546 }
1547 }
1548
1549 static int is_empty_line(const char *bol, const char *eol);
1550
1551 static void show_pre_context(struct grep_opt *opt, struct grep_source *gs,
1552 char *bol, char *end, unsigned lno)
1553 {
1554 unsigned cur = lno, from = 1, funcname_lno = 0, orig_from;
1555 int funcname_needed = !!opt->funcname, comment_needed = 0;
1556
1557 if (opt->pre_context < lno)
1558 from = lno - opt->pre_context;
1559 if (from <= opt->last_shown)
1560 from = opt->last_shown + 1;
1561 orig_from = from;
1562 if (opt->funcbody) {
1563 if (match_funcname(opt, gs, bol, end))
1564 comment_needed = 1;
1565 else
1566 funcname_needed = 1;
1567 from = opt->last_shown + 1;
1568 }
1569
1570 /* Rewind. */
1571 while (bol > gs->buf && cur > from) {
1572 char *next_bol = bol;
1573 char *eol = --bol;
1574
1575 while (bol > gs->buf && bol[-1] != '\n')
1576 bol--;
1577 cur--;
1578 if (comment_needed && (is_empty_line(bol, eol) ||
1579 match_funcname(opt, gs, bol, eol))) {
1580 comment_needed = 0;
1581 from = orig_from;
1582 if (cur < from) {
1583 cur++;
1584 bol = next_bol;
1585 break;
1586 }
1587 }
1588 if (funcname_needed && match_funcname(opt, gs, bol, eol)) {
1589 funcname_lno = cur;
1590 funcname_needed = 0;
1591 if (opt->funcbody)
1592 comment_needed = 1;
1593 else
1594 from = orig_from;
1595 }
1596 }
1597
1598 /* We need to look even further back to find a function signature. */
1599 if (opt->funcname && funcname_needed)
1600 show_funcname_line(opt, gs, bol, cur);
1601
1602 /* Back forward. */
1603 while (cur < lno) {
1604 char *eol = bol, sign = (cur == funcname_lno) ? '=' : '-';
1605
1606 while (*eol != '\n')
1607 eol++;
1608 show_line(opt, bol, eol, gs->name, cur, 0, sign);
1609 bol = eol + 1;
1610 cur++;
1611 }
1612 }
1613
1614 static int should_lookahead(struct grep_opt *opt)
1615 {
1616 struct grep_pat *p;
1617
1618 if (opt->extended)
1619 return 0; /* punt for too complex stuff */
1620 if (opt->invert)
1621 return 0;
1622 for (p = opt->pattern_list; p; p = p->next) {
1623 if (p->token != GREP_PATTERN)
1624 return 0; /* punt for "header only" and stuff */
1625 }
1626 return 1;
1627 }
1628
1629 static int look_ahead(struct grep_opt *opt,
1630 unsigned long *left_p,
1631 unsigned *lno_p,
1632 char **bol_p)
1633 {
1634 unsigned lno = *lno_p;
1635 char *bol = *bol_p;
1636 struct grep_pat *p;
1637 char *sp, *last_bol;
1638 regoff_t earliest = -1;
1639
1640 for (p = opt->pattern_list; p; p = p->next) {
1641 int hit;
1642 regmatch_t m;
1643
1644 hit = patmatch(p, bol, bol + *left_p, &m, 0);
1645 if (!hit || m.rm_so < 0 || m.rm_eo < 0)
1646 continue;
1647 if (earliest < 0 || m.rm_so < earliest)
1648 earliest = m.rm_so;
1649 }
1650
1651 if (earliest < 0) {
1652 *bol_p = bol + *left_p;
1653 *left_p = 0;
1654 return 1;
1655 }
1656 for (sp = bol + earliest; bol < sp && sp[-1] != '\n'; sp--)
1657 ; /* find the beginning of the line */
1658 last_bol = sp;
1659
1660 for (sp = bol; sp < last_bol; sp++) {
1661 if (*sp == '\n')
1662 lno++;
1663 }
1664 *left_p -= last_bol - bol;
1665 *bol_p = last_bol;
1666 *lno_p = lno;
1667 return 0;
1668 }
1669
1670 static int fill_textconv_grep(struct repository *r,
1671 struct userdiff_driver *driver,
1672 struct grep_source *gs)
1673 {
1674 struct diff_filespec *df;
1675 char *buf;
1676 size_t size;
1677
1678 if (!driver || !driver->textconv)
1679 return grep_source_load(gs);
1680
1681 /*
1682 * The textconv interface is intimately tied to diff_filespecs, so we
1683 * have to pretend to be one. If we could unify the grep_source
1684 * and diff_filespec structs, this mess could just go away.
1685 */
1686 df = alloc_filespec(gs->path);
1687 switch (gs->type) {
1688 case GREP_SOURCE_OID:
1689 fill_filespec(df, gs->identifier, 1, 0100644);
1690 break;
1691 case GREP_SOURCE_FILE:
1692 fill_filespec(df, &null_oid, 0, 0100644);
1693 break;
1694 default:
1695 BUG("attempt to textconv something without a path?");
1696 }
1697
1698 /*
1699 * fill_textconv is not remotely thread-safe; it may load objects
1700 * behind the scenes, and it modifies the global diff tempfile
1701 * structure.
1702 */
1703 grep_read_lock();
1704 size = fill_textconv(r, driver, df, &buf);
1705 grep_read_unlock();
1706 free_filespec(df);
1707
1708 /*
1709 * The normal fill_textconv usage by the diff machinery would just keep
1710 * the textconv'd buf separate from the diff_filespec. But much of the
1711 * grep code passes around a grep_source and assumes that its "buf"
1712 * pointer is the beginning of the thing we are searching. So let's
1713 * install our textconv'd version into the grep_source, taking care not
1714 * to leak any existing buffer.
1715 */
1716 grep_source_clear_data(gs);
1717 gs->buf = buf;
1718 gs->size = size;
1719
1720 return 0;
1721 }
1722
1723 static int is_empty_line(const char *bol, const char *eol)
1724 {
1725 while (bol < eol && isspace(*bol))
1726 bol++;
1727 return bol == eol;
1728 }
1729
1730 static int grep_source_1(struct grep_opt *opt, struct grep_source *gs, int collect_hits)
1731 {
1732 char *bol;
1733 char *peek_bol = NULL;
1734 unsigned long left;
1735 unsigned lno = 1;
1736 unsigned last_hit = 0;
1737 int binary_match_only = 0;
1738 unsigned count = 0;
1739 int try_lookahead = 0;
1740 int show_function = 0;
1741 struct userdiff_driver *textconv = NULL;
1742 enum grep_context ctx = GREP_CONTEXT_HEAD;
1743 xdemitconf_t xecfg;
1744
1745 if (!opt->status_only && gs->name == NULL)
1746 BUG("grep call which could print a name requires "
1747 "grep_source.name be non-NULL");
1748
1749 if (!opt->output)
1750 opt->output = std_output;
1751
1752 if (opt->pre_context || opt->post_context || opt->file_break ||
1753 opt->funcbody) {
1754 /* Show hunk marks, except for the first file. */
1755 if (opt->last_shown)
1756 opt->show_hunk_mark = 1;
1757 /*
1758 * If we're using threads then we can't easily identify
1759 * the first file. Always put hunk marks in that case
1760 * and skip the very first one later in work_done().
1761 */
1762 if (opt->output != std_output)
1763 opt->show_hunk_mark = 1;
1764 }
1765 opt->last_shown = 0;
1766
1767 if (opt->allow_textconv) {
1768 grep_source_load_driver(gs, opt->repo->index);
1769 /*
1770 * We might set up the shared textconv cache data here, which
1771 * is not thread-safe.
1772 */
1773 grep_attr_lock();
1774 textconv = userdiff_get_textconv(opt->repo, gs->driver);
1775 grep_attr_unlock();
1776 }
1777
1778 /*
1779 * We know the result of a textconv is text, so we only have to care
1780 * about binary handling if we are not using it.
1781 */
1782 if (!textconv) {
1783 switch (opt->binary) {
1784 case GREP_BINARY_DEFAULT:
1785 if (grep_source_is_binary(gs, opt->repo->index))
1786 binary_match_only = 1;
1787 break;
1788 case GREP_BINARY_NOMATCH:
1789 if (grep_source_is_binary(gs, opt->repo->index))
1790 return 0; /* Assume unmatch */
1791 break;
1792 case GREP_BINARY_TEXT:
1793 break;
1794 default:
1795 BUG("unknown binary handling mode");
1796 }
1797 }
1798
1799 memset(&xecfg, 0, sizeof(xecfg));
1800 opt->priv = &xecfg;
1801
1802 try_lookahead = should_lookahead(opt);
1803
1804 if (fill_textconv_grep(opt->repo, textconv, gs) < 0)
1805 return 0;
1806
1807 bol = gs->buf;
1808 left = gs->size;
1809 while (left) {
1810 char *eol, ch;
1811 int hit;
1812 ssize_t cno;
1813 ssize_t col = -1, icol = -1;
1814
1815 /*
1816 * look_ahead() skips quickly to the line that possibly
1817 * has the next hit; don't call it if we need to do
1818 * something more than just skipping the current line
1819 * in response to an unmatch for the current line. E.g.
1820 * inside a post-context window, we will show the current
1821 * line as a context around the previous hit when it
1822 * doesn't hit.
1823 */
1824 if (try_lookahead
1825 && !(last_hit
1826 && (show_function ||
1827 lno <= last_hit + opt->post_context))
1828 && look_ahead(opt, &left, &lno, &bol))
1829 break;
1830 eol = end_of_line(bol, &left);
1831 ch = *eol;
1832 *eol = 0;
1833
1834 if ((ctx == GREP_CONTEXT_HEAD) && (eol == bol))
1835 ctx = GREP_CONTEXT_BODY;
1836
1837 hit = match_line(opt, bol, eol, &col, &icol, ctx, collect_hits);
1838 *eol = ch;
1839
1840 if (collect_hits)
1841 goto next_line;
1842
1843 /* "grep -v -e foo -e bla" should list lines
1844 * that do not have either, so inversion should
1845 * be done outside.
1846 */
1847 if (opt->invert)
1848 hit = !hit;
1849 if (opt->unmatch_name_only) {
1850 if (hit)
1851 return 0;
1852 goto next_line;
1853 }
1854 if (hit) {
1855 count++;
1856 if (opt->status_only)
1857 return 1;
1858 if (opt->name_only) {
1859 show_name(opt, gs->name);
1860 return 1;
1861 }
1862 if (opt->count)
1863 goto next_line;
1864 if (binary_match_only) {
1865 opt->output(opt, "Binary file ", 12);
1866 output_color(opt, gs->name, strlen(gs->name),
1867 opt->colors[GREP_COLOR_FILENAME]);
1868 opt->output(opt, " matches\n", 9);
1869 return 1;
1870 }
1871 /* Hit at this line. If we haven't shown the
1872 * pre-context lines, we would need to show them.
1873 */
1874 if (opt->pre_context || opt->funcbody)
1875 show_pre_context(opt, gs, bol, eol, lno);
1876 else if (opt->funcname)
1877 show_funcname_line(opt, gs, bol, lno);
1878 cno = opt->invert ? icol : col;
1879 if (cno < 0) {
1880 /*
1881 * A negative cno indicates that there was no
1882 * match on the line. We are thus inverted and
1883 * being asked to show all lines that _don't_
1884 * match a given expression. Therefore, set cno
1885 * to 0 to suggest the whole line matches.
1886 */
1887 cno = 0;
1888 }
1889 show_line(opt, bol, eol, gs->name, lno, cno + 1, ':');
1890 last_hit = lno;
1891 if (opt->funcbody)
1892 show_function = 1;
1893 goto next_line;
1894 }
1895 if (show_function && (!peek_bol || peek_bol < bol)) {
1896 unsigned long peek_left = left;
1897 char *peek_eol = eol;
1898
1899 /*
1900 * Trailing empty lines are not interesting.
1901 * Peek past them to see if they belong to the
1902 * body of the current function.
1903 */
1904 peek_bol = bol;
1905 while (is_empty_line(peek_bol, peek_eol)) {
1906 peek_bol = peek_eol + 1;
1907 peek_eol = end_of_line(peek_bol, &peek_left);
1908 }
1909
1910 if (match_funcname(opt, gs, peek_bol, peek_eol))
1911 show_function = 0;
1912 }
1913 if (show_function ||
1914 (last_hit && lno <= last_hit + opt->post_context)) {
1915 /* If the last hit is within the post context,
1916 * we need to show this line.
1917 */
1918 show_line(opt, bol, eol, gs->name, lno, col + 1, '-');
1919 }
1920
1921 next_line:
1922 bol = eol + 1;
1923 if (!left)
1924 break;
1925 left--;
1926 lno++;
1927 }
1928
1929 if (collect_hits)
1930 return 0;
1931
1932 if (opt->status_only)
1933 return opt->unmatch_name_only;
1934 if (opt->unmatch_name_only) {
1935 /* We did not see any hit, so we want to show this */
1936 show_name(opt, gs->name);
1937 return 1;
1938 }
1939
1940 xdiff_clear_find_func(&xecfg);
1941 opt->priv = NULL;
1942
1943 /* NEEDSWORK:
1944 * The real "grep -c foo *.c" gives many "bar.c:0" lines,
1945 * which feels mostly useless but sometimes useful. Maybe
1946 * make it another option? For now suppress them.
1947 */
1948 if (opt->count && count) {
1949 char buf[32];
1950 if (opt->pathname) {
1951 output_color(opt, gs->name, strlen(gs->name),
1952 opt->colors[GREP_COLOR_FILENAME]);
1953 output_sep(opt, ':');
1954 }
1955 xsnprintf(buf, sizeof(buf), "%u\n", count);
1956 opt->output(opt, buf, strlen(buf));
1957 return 1;
1958 }
1959 return !!last_hit;
1960 }
1961
1962 static void clr_hit_marker(struct grep_expr *x)
1963 {
1964 /* All-hit markers are meaningful only at the very top level
1965 * OR node.
1966 */
1967 while (1) {
1968 x->hit = 0;
1969 if (x->node != GREP_NODE_OR)
1970 return;
1971 x->u.binary.left->hit = 0;
1972 x = x->u.binary.right;
1973 }
1974 }
1975
1976 static int chk_hit_marker(struct grep_expr *x)
1977 {
1978 /* Top level nodes have hit markers. See if they all are hits */
1979 while (1) {
1980 if (x->node != GREP_NODE_OR)
1981 return x->hit;
1982 if (!x->u.binary.left->hit)
1983 return 0;
1984 x = x->u.binary.right;
1985 }
1986 }
1987
1988 int grep_source(struct grep_opt *opt, struct grep_source *gs)
1989 {
1990 /*
1991 * we do not have to do the two-pass grep when we do not check
1992 * buffer-wide "all-match".
1993 */
1994 if (!opt->all_match)
1995 return grep_source_1(opt, gs, 0);
1996
1997 /* Otherwise the toplevel "or" terms hit a bit differently.
1998 * We first clear hit markers from them.
1999 */
2000 clr_hit_marker(opt->pattern_expression);
2001 grep_source_1(opt, gs, 1);
2002
2003 if (!chk_hit_marker(opt->pattern_expression))
2004 return 0;
2005
2006 return grep_source_1(opt, gs, 0);
2007 }
2008
2009 int grep_buffer(struct grep_opt *opt, char *buf, unsigned long size)
2010 {
2011 struct grep_source gs;
2012 int r;
2013
2014 grep_source_init(&gs, GREP_SOURCE_BUF, NULL, NULL, NULL);
2015 gs.buf = buf;
2016 gs.size = size;
2017
2018 r = grep_source(opt, &gs);
2019
2020 grep_source_clear(&gs);
2021 return r;
2022 }
2023
2024 void grep_source_init(struct grep_source *gs, enum grep_source_type type,
2025 const char *name, const char *path,
2026 const void *identifier)
2027 {
2028 gs->type = type;
2029 gs->name = xstrdup_or_null(name);
2030 gs->path = xstrdup_or_null(path);
2031 gs->buf = NULL;
2032 gs->size = 0;
2033 gs->driver = NULL;
2034
2035 switch (type) {
2036 case GREP_SOURCE_FILE:
2037 gs->identifier = xstrdup(identifier);
2038 break;
2039 case GREP_SOURCE_OID:
2040 gs->identifier = oiddup(identifier);
2041 break;
2042 case GREP_SOURCE_BUF:
2043 gs->identifier = NULL;
2044 break;
2045 }
2046 }
2047
2048 void grep_source_clear(struct grep_source *gs)
2049 {
2050 FREE_AND_NULL(gs->name);
2051 FREE_AND_NULL(gs->path);
2052 FREE_AND_NULL(gs->identifier);
2053 grep_source_clear_data(gs);
2054 }
2055
2056 void grep_source_clear_data(struct grep_source *gs)
2057 {
2058 switch (gs->type) {
2059 case GREP_SOURCE_FILE:
2060 case GREP_SOURCE_OID:
2061 FREE_AND_NULL(gs->buf);
2062 gs->size = 0;
2063 break;
2064 case GREP_SOURCE_BUF:
2065 /* leave user-provided buf intact */
2066 break;
2067 }
2068 }
2069
2070 static int grep_source_load_oid(struct grep_source *gs)
2071 {
2072 enum object_type type;
2073
2074 grep_read_lock();
2075 gs->buf = read_object_file(gs->identifier, &type, &gs->size);
2076 grep_read_unlock();
2077
2078 if (!gs->buf)
2079 return error(_("'%s': unable to read %s"),
2080 gs->name,
2081 oid_to_hex(gs->identifier));
2082 return 0;
2083 }
2084
2085 static int grep_source_load_file(struct grep_source *gs)
2086 {
2087 const char *filename = gs->identifier;
2088 struct stat st;
2089 char *data;
2090 size_t size;
2091 int i;
2092
2093 if (lstat(filename, &st) < 0) {
2094 err_ret:
2095 if (errno != ENOENT)
2096 error_errno(_("failed to stat '%s'"), filename);
2097 return -1;
2098 }
2099 if (!S_ISREG(st.st_mode))
2100 return -1;
2101 size = xsize_t(st.st_size);
2102 i = open(filename, O_RDONLY);
2103 if (i < 0)
2104 goto err_ret;
2105 data = xmallocz(size);
2106 if (st.st_size != read_in_full(i, data, size)) {
2107 error_errno(_("'%s': short read"), filename);
2108 close(i);
2109 free(data);
2110 return -1;
2111 }
2112 close(i);
2113
2114 gs->buf = data;
2115 gs->size = size;
2116 return 0;
2117 }
2118
2119 static int grep_source_load(struct grep_source *gs)
2120 {
2121 if (gs->buf)
2122 return 0;
2123
2124 switch (gs->type) {
2125 case GREP_SOURCE_FILE:
2126 return grep_source_load_file(gs);
2127 case GREP_SOURCE_OID:
2128 return grep_source_load_oid(gs);
2129 case GREP_SOURCE_BUF:
2130 return gs->buf ? 0 : -1;
2131 }
2132 BUG("invalid grep_source type to load");
2133 }
2134
2135 void grep_source_load_driver(struct grep_source *gs,
2136 struct index_state *istate)
2137 {
2138 if (gs->driver)
2139 return;
2140
2141 grep_attr_lock();
2142 if (gs->path)
2143 gs->driver = userdiff_find_by_path(istate, gs->path);
2144 if (!gs->driver)
2145 gs->driver = userdiff_find_by_name("default");
2146 grep_attr_unlock();
2147 }
2148
2149 static int grep_source_is_binary(struct grep_source *gs,
2150 struct index_state *istate)
2151 {
2152 grep_source_load_driver(gs, istate);
2153 if (gs->driver->binary != -1)
2154 return gs->driver->binary;
2155
2156 if (!grep_source_load(gs))
2157 return buffer_is_binary(gs->buf, gs->size);
2158
2159 return 0;
2160 }
Alternate source for your git.git needs