4 #include "object-store.h"
6 #include "xdiff-interface.h"
12 static int grep_source_load(struct grep_source *gs);
13 static int grep_source_is_binary(struct grep_source *gs);
15 static struct grep_opt grep_defaults;
17 static void std_output(struct grep_opt *opt, const void *buf, size_t size)
19 fwrite(buf, size, 1, stdout);
22 static void color_set(char *dst, const char *color_bytes)
24 xsnprintf(dst, COLOR_MAXLEN, "%s", color_bytes);
28 * Initialize the grep_defaults template with hardcoded defaults.
29 * We could let the compiler do this, but without C99 initializers
30 * the code gets unwieldy and unreadable, so...
32 void init_grep_defaults(void)
34 struct grep_opt *opt = &grep_defaults;
41 memset(opt, 0, sizeof(*opt));
45 opt->pattern_type_option = GREP_PATTERN_TYPE_UNSPECIFIED;
46 color_set(opt->color_context, "");
47 color_set(opt->color_filename, "");
48 color_set(opt->color_function, "");
49 color_set(opt->color_lineno, "");
50 color_set(opt->color_match_context, GIT_COLOR_BOLD_RED);
51 color_set(opt->color_match_selected, GIT_COLOR_BOLD_RED);
52 color_set(opt->color_selected, "");
53 color_set(opt->color_sep, GIT_COLOR_CYAN);
55 opt->output = std_output;
58 static int parse_pattern_type_arg(const char *opt, const char *arg)
60 if (!strcmp(arg, "default"))
61 return GREP_PATTERN_TYPE_UNSPECIFIED;
62 else if (!strcmp(arg, "basic"))
63 return GREP_PATTERN_TYPE_BRE;
64 else if (!strcmp(arg, "extended"))
65 return GREP_PATTERN_TYPE_ERE;
66 else if (!strcmp(arg, "fixed"))
67 return GREP_PATTERN_TYPE_FIXED;
68 else if (!strcmp(arg, "perl"))
69 return GREP_PATTERN_TYPE_PCRE;
70 die("bad %s argument: %s", opt, arg);
74 * Read the configuration file once and store it in
75 * the grep_defaults template.
77 int grep_config(const char *var, const char *value, void *cb)
79 struct grep_opt *opt = &grep_defaults;
82 if (userdiff_config(var, value) < 0)
85 if (!strcmp(var, "grep.extendedregexp")) {
86 opt->extended_regexp_option = git_config_bool(var, value);
90 if (!strcmp(var, "grep.patterntype")) {
91 opt->pattern_type_option = parse_pattern_type_arg(var, value);
95 if (!strcmp(var, "grep.linenumber")) {
96 opt->linenum = git_config_bool(var, value);
100 if (!strcmp(var, "grep.fullname")) {
101 opt->relative = !git_config_bool(var, value);
105 if (!strcmp(var, "color.grep"))
106 opt->color = git_config_colorbool(var, value);
107 else if (!strcmp(var, "color.grep.context"))
108 color = opt->color_context;
109 else if (!strcmp(var, "color.grep.filename"))
110 color = opt->color_filename;
111 else if (!strcmp(var, "color.grep.function"))
112 color = opt->color_function;
113 else if (!strcmp(var, "color.grep.linenumber"))
114 color = opt->color_lineno;
115 else if (!strcmp(var, "color.grep.matchcontext"))
116 color = opt->color_match_context;
117 else if (!strcmp(var, "color.grep.matchselected"))
118 color = opt->color_match_selected;
119 else if (!strcmp(var, "color.grep.selected"))
120 color = opt->color_selected;
121 else if (!strcmp(var, "color.grep.separator"))
122 color = opt->color_sep;
123 else if (!strcmp(var, "color.grep.match")) {
126 return config_error_nonbool(var);
127 rc |= color_parse(value, opt->color_match_context);
128 rc |= color_parse(value, opt->color_match_selected);
134 return config_error_nonbool(var);
135 return color_parse(value, color);
141 * Initialize one instance of grep_opt and copy the
142 * default values from the template we read the configuration
143 * information in an earlier call to git_config(grep_config).
145 void grep_init(struct grep_opt *opt, const char *prefix)
147 struct grep_opt *def = &grep_defaults;
149 memset(opt, 0, sizeof(*opt));
150 opt->prefix = prefix;
151 opt->prefix_length = (prefix && *prefix) ? strlen(prefix) : 0;
152 opt->pattern_tail = &opt->pattern_list;
153 opt->header_tail = &opt->header_list;
155 opt->color = def->color;
156 opt->extended_regexp_option = def->extended_regexp_option;
157 opt->pattern_type_option = def->pattern_type_option;
158 opt->linenum = def->linenum;
159 opt->max_depth = def->max_depth;
160 opt->pathname = def->pathname;
161 opt->relative = def->relative;
162 opt->output = def->output;
164 color_set(opt->color_context, def->color_context);
165 color_set(opt->color_filename, def->color_filename);
166 color_set(opt->color_function, def->color_function);
167 color_set(opt->color_lineno, def->color_lineno);
168 color_set(opt->color_match_context, def->color_match_context);
169 color_set(opt->color_match_selected, def->color_match_selected);
170 color_set(opt->color_selected, def->color_selected);
171 color_set(opt->color_sep, def->color_sep);
174 static void grep_set_pattern_type_option(enum grep_pattern_type pattern_type, struct grep_opt *opt)
177 * When committing to the pattern type by setting the relevant
178 * fields in grep_opt it's generally not necessary to zero out
179 * the fields we're not choosing, since they won't have been
180 * set by anything. The extended_regexp_option field is the
181 * only exception to this.
183 * This is because in the process of parsing grep.patternType
184 * & grep.extendedRegexp we set opt->pattern_type_option and
185 * opt->extended_regexp_option, respectively. We then
186 * internally use opt->extended_regexp_option to see if we're
187 * compiling an ERE. It must be unset if that's not actually
190 if (pattern_type != GREP_PATTERN_TYPE_ERE &&
191 opt->extended_regexp_option)
192 opt->extended_regexp_option = 0;
194 switch (pattern_type) {
195 case GREP_PATTERN_TYPE_UNSPECIFIED:
198 case GREP_PATTERN_TYPE_BRE:
201 case GREP_PATTERN_TYPE_ERE:
202 opt->extended_regexp_option = 1;
205 case GREP_PATTERN_TYPE_FIXED:
209 case GREP_PATTERN_TYPE_PCRE:
214 * It's important that pcre1 always be assigned to
215 * even when there's no USE_LIBPCRE* defined. We still
216 * call the PCRE stub function, it just dies with
217 * "cannot use Perl-compatible regexes[...]".
225 void grep_commit_pattern_type(enum grep_pattern_type pattern_type, struct grep_opt *opt)
227 if (pattern_type != GREP_PATTERN_TYPE_UNSPECIFIED)
228 grep_set_pattern_type_option(pattern_type, opt);
229 else if (opt->pattern_type_option != GREP_PATTERN_TYPE_UNSPECIFIED)
230 grep_set_pattern_type_option(opt->pattern_type_option, opt);
231 else if (opt->extended_regexp_option)
233 * This branch *must* happen after setting from the
234 * opt->pattern_type_option above, we don't want
235 * grep.extendedRegexp to override grep.patternType!
237 grep_set_pattern_type_option(GREP_PATTERN_TYPE_ERE, opt);
240 static struct grep_pat *create_grep_pat(const char *pat, size_t patlen,
241 const char *origin, int no,
242 enum grep_pat_token t,
243 enum grep_header_field field)
245 struct grep_pat *p = xcalloc(1, sizeof(*p));
246 p->pattern = xmemdupz(pat, patlen);
247 p->patternlen = patlen;
255 static void do_append_grep_pat(struct grep_pat ***tail, struct grep_pat *p)
262 case GREP_PATTERN: /* atom */
263 case GREP_PATTERN_HEAD:
264 case GREP_PATTERN_BODY:
266 struct grep_pat *new_pat;
268 char *cp = p->pattern + p->patternlen, *nl = NULL;
269 while (++len <= p->patternlen) {
270 if (*(--cp) == '\n') {
277 new_pat = create_grep_pat(nl + 1, len - 1, p->origin,
278 p->no, p->token, p->field);
279 new_pat->next = p->next;
281 *tail = &new_pat->next;
284 p->patternlen -= len;
292 void append_header_grep_pattern(struct grep_opt *opt,
293 enum grep_header_field field, const char *pat)
295 struct grep_pat *p = create_grep_pat(pat, strlen(pat), "header", 0,
296 GREP_PATTERN_HEAD, field);
297 if (field == GREP_HEADER_REFLOG)
298 opt->use_reflog_filter = 1;
299 do_append_grep_pat(&opt->header_tail, p);
302 void append_grep_pattern(struct grep_opt *opt, const char *pat,
303 const char *origin, int no, enum grep_pat_token t)
305 append_grep_pat(opt, pat, strlen(pat), origin, no, t);
308 void append_grep_pat(struct grep_opt *opt, const char *pat, size_t patlen,
309 const char *origin, int no, enum grep_pat_token t)
311 struct grep_pat *p = create_grep_pat(pat, patlen, origin, no, t, 0);
312 do_append_grep_pat(&opt->pattern_tail, p);
315 struct grep_opt *grep_opt_dup(const struct grep_opt *opt)
317 struct grep_pat *pat;
318 struct grep_opt *ret = xmalloc(sizeof(struct grep_opt));
321 ret->pattern_list = NULL;
322 ret->pattern_tail = &ret->pattern_list;
324 for(pat = opt->pattern_list; pat != NULL; pat = pat->next)
326 if(pat->token == GREP_PATTERN_HEAD)
327 append_header_grep_pattern(ret, pat->field,
330 append_grep_pat(ret, pat->pattern, pat->patternlen,
331 pat->origin, pat->no, pat->token);
337 static NORETURN void compile_regexp_failed(const struct grep_pat *p,
343 xsnprintf(where, sizeof(where), "In '%s' at %d, ", p->origin, p->no);
345 xsnprintf(where, sizeof(where), "%s, ", p->origin);
349 die("%s'%s': %s", where, p->pattern, error);
352 static int is_fixed(const char *s, size_t len)
356 for (i = 0; i < len; i++) {
357 if (is_regex_special(s[i]))
364 static int has_null(const char *s, size_t len)
367 * regcomp cannot accept patterns with NULs so when using it
368 * we consider any pattern containing a NUL fixed.
370 if (memchr(s, 0, len))
377 static void compile_pcre1_regexp(struct grep_pat *p, const struct grep_opt *opt)
381 int options = PCRE_MULTILINE;
383 if (opt->ignore_case) {
384 if (has_non_ascii(p->pattern))
385 p->pcre1_tables = pcre_maketables();
386 options |= PCRE_CASELESS;
388 if (is_utf8_locale() && has_non_ascii(p->pattern))
389 options |= PCRE_UTF8;
391 p->pcre1_regexp = pcre_compile(p->pattern, options, &error, &erroffset,
393 if (!p->pcre1_regexp)
394 compile_regexp_failed(p, error);
396 p->pcre1_extra_info = pcre_study(p->pcre1_regexp, GIT_PCRE_STUDY_JIT_COMPILE, &error);
397 if (!p->pcre1_extra_info && error)
400 #ifdef GIT_PCRE1_USE_JIT
401 pcre_config(PCRE_CONFIG_JIT, &p->pcre1_jit_on);
402 if (p->pcre1_jit_on == 1) {
403 p->pcre1_jit_stack = pcre_jit_stack_alloc(1, 1024 * 1024);
404 if (!p->pcre1_jit_stack)
405 die("Couldn't allocate PCRE JIT stack");
406 pcre_assign_jit_stack(p->pcre1_extra_info, NULL, p->pcre1_jit_stack);
407 } else if (p->pcre1_jit_on != 0) {
408 die("BUG: The pcre1_jit_on variable should be 0 or 1, not %d",
414 static int pcre1match(struct grep_pat *p, const char *line, const char *eol,
415 regmatch_t *match, int eflags)
417 int ovector[30], ret, flags = 0;
419 if (eflags & REG_NOTBOL)
420 flags |= PCRE_NOTBOL;
422 #ifdef GIT_PCRE1_USE_JIT
423 if (p->pcre1_jit_on) {
424 ret = pcre_jit_exec(p->pcre1_regexp, p->pcre1_extra_info, line,
425 eol - line, 0, flags, ovector,
426 ARRAY_SIZE(ovector), p->pcre1_jit_stack);
430 ret = pcre_exec(p->pcre1_regexp, p->pcre1_extra_info, line,
431 eol - line, 0, flags, ovector,
432 ARRAY_SIZE(ovector));
435 if (ret < 0 && ret != PCRE_ERROR_NOMATCH)
436 die("pcre_exec failed with error code %d", ret);
439 match->rm_so = ovector[0];
440 match->rm_eo = ovector[1];
446 static void free_pcre1_regexp(struct grep_pat *p)
448 pcre_free(p->pcre1_regexp);
449 #ifdef GIT_PCRE1_USE_JIT
450 if (p->pcre1_jit_on) {
451 pcre_free_study(p->pcre1_extra_info);
452 pcre_jit_stack_free(p->pcre1_jit_stack);
456 pcre_free(p->pcre1_extra_info);
458 pcre_free((void *)p->pcre1_tables);
460 #else /* !USE_LIBPCRE1 */
461 static void compile_pcre1_regexp(struct grep_pat *p, const struct grep_opt *opt)
463 die("cannot use Perl-compatible regexes when not compiled with USE_LIBPCRE");
466 static int pcre1match(struct grep_pat *p, const char *line, const char *eol,
467 regmatch_t *match, int eflags)
472 static void free_pcre1_regexp(struct grep_pat *p)
475 #endif /* !USE_LIBPCRE1 */
478 static void compile_pcre2_pattern(struct grep_pat *p, const struct grep_opt *opt)
481 PCRE2_UCHAR errbuf[256];
482 PCRE2_SIZE erroffset;
483 int options = PCRE2_MULTILINE;
484 const uint8_t *character_tables = NULL;
491 p->pcre2_compile_context = NULL;
493 if (opt->ignore_case) {
494 if (has_non_ascii(p->pattern)) {
495 character_tables = pcre2_maketables(NULL);
496 p->pcre2_compile_context = pcre2_compile_context_create(NULL);
497 pcre2_set_character_tables(p->pcre2_compile_context, character_tables);
499 options |= PCRE2_CASELESS;
501 if (is_utf8_locale() && has_non_ascii(p->pattern))
502 options |= PCRE2_UTF;
504 p->pcre2_pattern = pcre2_compile((PCRE2_SPTR)p->pattern,
505 p->patternlen, options, &error, &erroffset,
506 p->pcre2_compile_context);
508 if (p->pcre2_pattern) {
509 p->pcre2_match_data = pcre2_match_data_create_from_pattern(p->pcre2_pattern, NULL);
510 if (!p->pcre2_match_data)
511 die("Couldn't allocate PCRE2 match data");
513 pcre2_get_error_message(error, errbuf, sizeof(errbuf));
514 compile_regexp_failed(p, (const char *)&errbuf);
517 pcre2_config(PCRE2_CONFIG_JIT, &p->pcre2_jit_on);
518 if (p->pcre2_jit_on == 1) {
519 jitret = pcre2_jit_compile(p->pcre2_pattern, PCRE2_JIT_COMPLETE);
521 die("Couldn't JIT the PCRE2 pattern '%s', got '%d'\n", p->pattern, jitret);
524 * The pcre2_config(PCRE2_CONFIG_JIT, ...) call just
525 * tells us whether the library itself supports JIT,
526 * but to see whether we're going to be actually using
527 * JIT we need to extract PCRE2_INFO_JITSIZE from the
528 * pattern *after* we do pcre2_jit_compile() above.
530 * This is because if the pattern contains the
531 * (*NO_JIT) verb (see pcre2syntax(3))
532 * pcre2_jit_compile() will exit early with 0. If we
533 * then proceed to call pcre2_jit_match() further down
534 * the line instead of pcre2_match() we'll either
535 * segfault (pre PCRE 10.31) or run into a fatal error
538 patinforet = pcre2_pattern_info(p->pcre2_pattern, PCRE2_INFO_JITSIZE, &jitsizearg);
540 BUG("pcre2_pattern_info() failed: %d", patinforet);
541 if (jitsizearg == 0) {
546 p->pcre2_jit_stack = pcre2_jit_stack_create(1, 1024 * 1024, NULL);
547 if (!p->pcre2_jit_stack)
548 die("Couldn't allocate PCRE2 JIT stack");
549 p->pcre2_match_context = pcre2_match_context_create(NULL);
550 if (!p->pcre2_match_context)
551 die("Couldn't allocate PCRE2 match context");
552 pcre2_jit_stack_assign(p->pcre2_match_context, NULL, p->pcre2_jit_stack);
553 } else if (p->pcre2_jit_on != 0) {
554 die("BUG: The pcre2_jit_on variable should be 0 or 1, not %d",
559 static int pcre2match(struct grep_pat *p, const char *line, const char *eol,
560 regmatch_t *match, int eflags)
564 PCRE2_UCHAR errbuf[256];
566 if (eflags & REG_NOTBOL)
567 flags |= PCRE2_NOTBOL;
570 ret = pcre2_jit_match(p->pcre2_pattern, (unsigned char *)line,
571 eol - line, 0, flags, p->pcre2_match_data,
574 ret = pcre2_match(p->pcre2_pattern, (unsigned char *)line,
575 eol - line, 0, flags, p->pcre2_match_data,
578 if (ret < 0 && ret != PCRE2_ERROR_NOMATCH) {
579 pcre2_get_error_message(ret, errbuf, sizeof(errbuf));
580 die("%s failed with error code %d: %s",
581 (p->pcre2_jit_on ? "pcre2_jit_match" : "pcre2_match"), ret,
585 ovector = pcre2_get_ovector_pointer(p->pcre2_match_data);
587 match->rm_so = (int)ovector[0];
588 match->rm_eo = (int)ovector[1];
594 static void free_pcre2_pattern(struct grep_pat *p)
596 pcre2_compile_context_free(p->pcre2_compile_context);
597 pcre2_code_free(p->pcre2_pattern);
598 pcre2_match_data_free(p->pcre2_match_data);
599 pcre2_jit_stack_free(p->pcre2_jit_stack);
600 pcre2_match_context_free(p->pcre2_match_context);
602 #else /* !USE_LIBPCRE2 */
603 static void compile_pcre2_pattern(struct grep_pat *p, const struct grep_opt *opt)
606 * Unreachable until USE_LIBPCRE2 becomes synonymous with
607 * USE_LIBPCRE. See the sibling comment in
608 * grep_set_pattern_type_option().
610 die("cannot use Perl-compatible regexes when not compiled with USE_LIBPCRE");
613 static int pcre2match(struct grep_pat *p, const char *line, const char *eol,
614 regmatch_t *match, int eflags)
619 static void free_pcre2_pattern(struct grep_pat *p)
622 #endif /* !USE_LIBPCRE2 */
624 static void compile_fixed_regexp(struct grep_pat *p, struct grep_opt *opt)
626 struct strbuf sb = STRBUF_INIT;
630 basic_regex_quote_buf(&sb, p->pattern);
631 if (opt->ignore_case)
632 regflags |= REG_ICASE;
633 err = regcomp(&p->regexp, sb.buf, regflags);
635 fprintf(stderr, "fixed %s\n", sb.buf);
639 regerror(err, &p->regexp, errbuf, sizeof(errbuf));
641 compile_regexp_failed(p, errbuf);
645 static void compile_regexp(struct grep_pat *p, struct grep_opt *opt)
649 int regflags = REG_NEWLINE;
651 p->word_regexp = opt->word_regexp;
652 p->ignore_case = opt->ignore_case;
653 ascii_only = !has_non_ascii(p->pattern);
656 * Even when -F (fixed) asks us to do a non-regexp search, we
657 * may not be able to correctly case-fold when -i
658 * (ignore-case) is asked (in which case, we'll synthesize a
659 * regexp to match the pattern that matches regexp special
660 * characters literally, while ignoring case differences). On
661 * the other hand, even without -F, if the pattern does not
662 * have any regexp special characters and there is no need for
663 * case-folding search, we can internally turn it into a
664 * simple string match using kws. p->fixed tells us if we
668 has_null(p->pattern, p->patternlen) ||
669 is_fixed(p->pattern, p->patternlen))
670 p->fixed = !p->ignore_case || ascii_only;
673 p->kws = kwsalloc(p->ignore_case ? tolower_trans_tbl : NULL);
674 kwsincr(p->kws, p->pattern, p->patternlen);
677 } else if (opt->fixed) {
679 * We come here when the pattern has the non-ascii
680 * characters we cannot case-fold, and asked to
683 compile_fixed_regexp(p, opt);
688 compile_pcre2_pattern(p, opt);
693 compile_pcre1_regexp(p, opt);
698 regflags |= REG_ICASE;
699 if (opt->extended_regexp_option)
700 regflags |= REG_EXTENDED;
701 err = regcomp(&p->regexp, p->pattern, regflags);
704 regerror(err, &p->regexp, errbuf, 1024);
706 compile_regexp_failed(p, errbuf);
710 static struct grep_expr *compile_pattern_or(struct grep_pat **);
711 static struct grep_expr *compile_pattern_atom(struct grep_pat **list)
720 case GREP_PATTERN: /* atom */
721 case GREP_PATTERN_HEAD:
722 case GREP_PATTERN_BODY:
723 x = xcalloc(1, sizeof (struct grep_expr));
724 x->node = GREP_NODE_ATOM;
728 case GREP_OPEN_PAREN:
730 x = compile_pattern_or(list);
731 if (!*list || (*list)->token != GREP_CLOSE_PAREN)
732 die("unmatched parenthesis");
733 *list = (*list)->next;
740 static struct grep_expr *compile_pattern_not(struct grep_pat **list)
751 die("--not not followed by pattern expression");
753 x = xcalloc(1, sizeof (struct grep_expr));
754 x->node = GREP_NODE_NOT;
755 x->u.unary = compile_pattern_not(list);
757 die("--not followed by non pattern expression");
760 return compile_pattern_atom(list);
764 static struct grep_expr *compile_pattern_and(struct grep_pat **list)
767 struct grep_expr *x, *y, *z;
769 x = compile_pattern_not(list);
771 if (p && p->token == GREP_AND) {
773 die("--and not followed by pattern expression");
775 y = compile_pattern_and(list);
777 die("--and not followed by pattern expression");
778 z = xcalloc(1, sizeof (struct grep_expr));
779 z->node = GREP_NODE_AND;
780 z->u.binary.left = x;
781 z->u.binary.right = y;
787 static struct grep_expr *compile_pattern_or(struct grep_pat **list)
790 struct grep_expr *x, *y, *z;
792 x = compile_pattern_and(list);
794 if (x && p && p->token != GREP_CLOSE_PAREN) {
795 y = compile_pattern_or(list);
797 die("not a pattern expression %s", p->pattern);
798 z = xcalloc(1, sizeof (struct grep_expr));
799 z->node = GREP_NODE_OR;
800 z->u.binary.left = x;
801 z->u.binary.right = y;
807 static struct grep_expr *compile_pattern_expr(struct grep_pat **list)
809 return compile_pattern_or(list);
812 static void indent(int in)
818 static void dump_grep_pat(struct grep_pat *p)
821 case GREP_AND: fprintf(stderr, "*and*"); break;
822 case GREP_OPEN_PAREN: fprintf(stderr, "*(*"); break;
823 case GREP_CLOSE_PAREN: fprintf(stderr, "*)*"); break;
824 case GREP_NOT: fprintf(stderr, "*not*"); break;
825 case GREP_OR: fprintf(stderr, "*or*"); break;
827 case GREP_PATTERN: fprintf(stderr, "pattern"); break;
828 case GREP_PATTERN_HEAD: fprintf(stderr, "pattern_head"); break;
829 case GREP_PATTERN_BODY: fprintf(stderr, "pattern_body"); break;
834 case GREP_PATTERN_HEAD:
835 fprintf(stderr, "<head %d>", p->field); break;
836 case GREP_PATTERN_BODY:
837 fprintf(stderr, "<body>"); break;
841 case GREP_PATTERN_HEAD:
842 case GREP_PATTERN_BODY:
844 fprintf(stderr, "%.*s", (int)p->patternlen, p->pattern);
850 static void dump_grep_expression_1(struct grep_expr *x, int in)
855 fprintf(stderr, "true\n");
858 dump_grep_pat(x->u.atom);
861 fprintf(stderr, "(not\n");
862 dump_grep_expression_1(x->u.unary, in+1);
864 fprintf(stderr, ")\n");
867 fprintf(stderr, "(and\n");
868 dump_grep_expression_1(x->u.binary.left, in+1);
869 dump_grep_expression_1(x->u.binary.right, in+1);
871 fprintf(stderr, ")\n");
874 fprintf(stderr, "(or\n");
875 dump_grep_expression_1(x->u.binary.left, in+1);
876 dump_grep_expression_1(x->u.binary.right, in+1);
878 fprintf(stderr, ")\n");
883 static void dump_grep_expression(struct grep_opt *opt)
885 struct grep_expr *x = opt->pattern_expression;
888 fprintf(stderr, "[all-match]\n");
889 dump_grep_expression_1(x, 0);
893 static struct grep_expr *grep_true_expr(void)
895 struct grep_expr *z = xcalloc(1, sizeof(*z));
896 z->node = GREP_NODE_TRUE;
900 static struct grep_expr *grep_or_expr(struct grep_expr *left, struct grep_expr *right)
902 struct grep_expr *z = xcalloc(1, sizeof(*z));
903 z->node = GREP_NODE_OR;
904 z->u.binary.left = left;
905 z->u.binary.right = right;
909 static struct grep_expr *prep_header_patterns(struct grep_opt *opt)
912 struct grep_expr *header_expr;
913 struct grep_expr *(header_group[GREP_HEADER_FIELD_MAX]);
914 enum grep_header_field fld;
916 if (!opt->header_list)
919 for (p = opt->header_list; p; p = p->next) {
920 if (p->token != GREP_PATTERN_HEAD)
921 die("BUG: a non-header pattern in grep header list.");
922 if (p->field < GREP_HEADER_FIELD_MIN ||
923 GREP_HEADER_FIELD_MAX <= p->field)
924 die("BUG: unknown header field %d", p->field);
925 compile_regexp(p, opt);
928 for (fld = 0; fld < GREP_HEADER_FIELD_MAX; fld++)
929 header_group[fld] = NULL;
931 for (p = opt->header_list; p; p = p->next) {
933 struct grep_pat *pp = p;
935 h = compile_pattern_atom(&pp);
936 if (!h || pp != p->next)
937 die("BUG: malformed header expr");
938 if (!header_group[p->field]) {
939 header_group[p->field] = h;
942 header_group[p->field] = grep_or_expr(h, header_group[p->field]);
947 for (fld = 0; fld < GREP_HEADER_FIELD_MAX; fld++) {
948 if (!header_group[fld])
951 header_expr = grep_true_expr();
952 header_expr = grep_or_expr(header_group[fld], header_expr);
957 static struct grep_expr *grep_splice_or(struct grep_expr *x, struct grep_expr *y)
959 struct grep_expr *z = x;
962 assert(x->node == GREP_NODE_OR);
963 if (x->u.binary.right &&
964 x->u.binary.right->node == GREP_NODE_TRUE) {
965 x->u.binary.right = y;
968 x = x->u.binary.right;
973 static void compile_grep_patterns_real(struct grep_opt *opt)
976 struct grep_expr *header_expr = prep_header_patterns(opt);
978 for (p = opt->pattern_list; p; p = p->next) {
980 case GREP_PATTERN: /* atom */
981 case GREP_PATTERN_HEAD:
982 case GREP_PATTERN_BODY:
983 compile_regexp(p, opt);
991 if (opt->all_match || header_expr)
993 else if (!opt->extended && !opt->debug)
996 p = opt->pattern_list;
998 opt->pattern_expression = compile_pattern_expr(&p);
1000 die("incomplete pattern expression: %s", p->pattern);
1005 if (!opt->pattern_expression)
1006 opt->pattern_expression = header_expr;
1007 else if (opt->all_match)
1008 opt->pattern_expression = grep_splice_or(header_expr,
1009 opt->pattern_expression);
1011 opt->pattern_expression = grep_or_expr(opt->pattern_expression,
1016 void compile_grep_patterns(struct grep_opt *opt)
1018 compile_grep_patterns_real(opt);
1020 dump_grep_expression(opt);
1023 static void free_pattern_expr(struct grep_expr *x)
1026 case GREP_NODE_TRUE:
1027 case GREP_NODE_ATOM:
1030 free_pattern_expr(x->u.unary);
1034 free_pattern_expr(x->u.binary.left);
1035 free_pattern_expr(x->u.binary.right);
1041 void free_grep_patterns(struct grep_opt *opt)
1043 struct grep_pat *p, *n;
1045 for (p = opt->pattern_list; p; p = n) {
1048 case GREP_PATTERN: /* atom */
1049 case GREP_PATTERN_HEAD:
1050 case GREP_PATTERN_BODY:
1053 else if (p->pcre1_regexp)
1054 free_pcre1_regexp(p);
1055 else if (p->pcre2_pattern)
1056 free_pcre2_pattern(p);
1058 regfree(&p->regexp);
1069 free_pattern_expr(opt->pattern_expression);
1072 static char *end_of_line(char *cp, unsigned long *left)
1074 unsigned long l = *left;
1075 while (l && *cp != '\n') {
1083 static int word_char(char ch)
1085 return isalnum(ch) || ch == '_';
1088 static void output_color(struct grep_opt *opt, const void *data, size_t size,
1091 if (want_color(opt->color) && color && color[0]) {
1092 opt->output(opt, color, strlen(color));
1093 opt->output(opt, data, size);
1094 opt->output(opt, GIT_COLOR_RESET, strlen(GIT_COLOR_RESET));
1096 opt->output(opt, data, size);
1099 static void output_sep(struct grep_opt *opt, char sign)
1101 if (opt->null_following_name)
1102 opt->output(opt, "\0", 1);
1104 output_color(opt, &sign, 1, opt->color_sep);
1107 static void show_name(struct grep_opt *opt, const char *name)
1109 output_color(opt, name, strlen(name), opt->color_filename);
1110 opt->output(opt, opt->null_following_name ? "\0" : "\n", 1);
1113 static int fixmatch(struct grep_pat *p, char *line, char *eol,
1116 struct kwsmatch kwsm;
1117 size_t offset = kwsexec(p->kws, line, eol - line, &kwsm);
1119 match->rm_so = match->rm_eo = -1;
1122 match->rm_so = offset;
1123 match->rm_eo = match->rm_so + kwsm.size[0];
1128 static int patmatch(struct grep_pat *p, char *line, char *eol,
1129 regmatch_t *match, int eflags)
1134 hit = !fixmatch(p, line, eol, match);
1135 else if (p->pcre1_regexp)
1136 hit = !pcre1match(p, line, eol, match, eflags);
1137 else if (p->pcre2_pattern)
1138 hit = !pcre2match(p, line, eol, match, eflags);
1140 hit = !regexec_buf(&p->regexp, line, eol - line, 1, match,
1146 static int strip_timestamp(char *bol, char **eol_p)
1151 while (bol < --eol) {
1165 } header_field[] = {
1167 { "committer ", 10 },
1171 static int match_one_pattern(struct grep_pat *p, char *bol, char *eol,
1172 enum grep_context ctx,
1173 regmatch_t *pmatch, int eflags)
1177 const char *start = bol;
1179 if ((p->token != GREP_PATTERN) &&
1180 ((p->token == GREP_PATTERN_HEAD) != (ctx == GREP_CONTEXT_HEAD)))
1183 if (p->token == GREP_PATTERN_HEAD) {
1186 assert(p->field < ARRAY_SIZE(header_field));
1187 field = header_field[p->field].field;
1188 len = header_field[p->field].len;
1189 if (strncmp(bol, field, len))
1193 case GREP_HEADER_AUTHOR:
1194 case GREP_HEADER_COMMITTER:
1195 saved_ch = strip_timestamp(bol, &eol);
1203 hit = patmatch(p, bol, eol, pmatch, eflags);
1205 if (hit && p->word_regexp) {
1206 if ((pmatch[0].rm_so < 0) ||
1207 (eol - bol) < pmatch[0].rm_so ||
1208 (pmatch[0].rm_eo < 0) ||
1209 (eol - bol) < pmatch[0].rm_eo)
1210 die("regexp returned nonsense");
1212 /* Match beginning must be either beginning of the
1213 * line, or at word boundary (i.e. the last char must
1214 * not be a word char). Similarly, match end must be
1215 * either end of the line, or at word boundary
1216 * (i.e. the next char must not be a word char).
1218 if ( ((pmatch[0].rm_so == 0) ||
1219 !word_char(bol[pmatch[0].rm_so-1])) &&
1220 ((pmatch[0].rm_eo == (eol-bol)) ||
1221 !word_char(bol[pmatch[0].rm_eo])) )
1226 /* Words consist of at least one character. */
1227 if (pmatch->rm_so == pmatch->rm_eo)
1230 if (!hit && pmatch[0].rm_so + bol + 1 < eol) {
1231 /* There could be more than one match on the
1232 * line, and the first match might not be
1233 * strict word match. But later ones could be!
1234 * Forward to the next possible start, i.e. the
1235 * next position following a non-word char.
1237 bol = pmatch[0].rm_so + bol + 1;
1238 while (word_char(bol[-1]) && bol < eol)
1240 eflags |= REG_NOTBOL;
1245 if (p->token == GREP_PATTERN_HEAD && saved_ch)
1248 pmatch[0].rm_so += bol - start;
1249 pmatch[0].rm_eo += bol - start;
1254 static int match_expr_eval(struct grep_expr *x, char *bol, char *eol,
1255 enum grep_context ctx, int collect_hits)
1261 die("Not a valid grep expression");
1263 case GREP_NODE_TRUE:
1266 case GREP_NODE_ATOM:
1267 h = match_one_pattern(x->u.atom, bol, eol, ctx, &match, 0);
1270 h = !match_expr_eval(x->u.unary, bol, eol, ctx, 0);
1273 if (!match_expr_eval(x->u.binary.left, bol, eol, ctx, 0))
1275 h = match_expr_eval(x->u.binary.right, bol, eol, ctx, 0);
1279 return (match_expr_eval(x->u.binary.left,
1280 bol, eol, ctx, 0) ||
1281 match_expr_eval(x->u.binary.right,
1283 h = match_expr_eval(x->u.binary.left, bol, eol, ctx, 0);
1284 x->u.binary.left->hit |= h;
1285 h |= match_expr_eval(x->u.binary.right, bol, eol, ctx, 1);
1288 die("Unexpected node type (internal error) %d", x->node);
1295 static int match_expr(struct grep_opt *opt, char *bol, char *eol,
1296 enum grep_context ctx, int collect_hits)
1298 struct grep_expr *x = opt->pattern_expression;
1299 return match_expr_eval(x, bol, eol, ctx, collect_hits);
1302 static int match_line(struct grep_opt *opt, char *bol, char *eol,
1303 enum grep_context ctx, int collect_hits)
1309 return match_expr(opt, bol, eol, ctx, collect_hits);
1311 /* we do not call with collect_hits without being extended */
1312 for (p = opt->pattern_list; p; p = p->next) {
1313 if (match_one_pattern(p, bol, eol, ctx, &match, 0))
1319 static int match_next_pattern(struct grep_pat *p, char *bol, char *eol,
1320 enum grep_context ctx,
1321 regmatch_t *pmatch, int eflags)
1325 if (!match_one_pattern(p, bol, eol, ctx, &match, eflags))
1327 if (match.rm_so < 0 || match.rm_eo < 0)
1329 if (pmatch->rm_so >= 0 && pmatch->rm_eo >= 0) {
1330 if (match.rm_so > pmatch->rm_so)
1332 if (match.rm_so == pmatch->rm_so && match.rm_eo < pmatch->rm_eo)
1335 pmatch->rm_so = match.rm_so;
1336 pmatch->rm_eo = match.rm_eo;
1340 static int next_match(struct grep_opt *opt, char *bol, char *eol,
1341 enum grep_context ctx, regmatch_t *pmatch, int eflags)
1346 pmatch->rm_so = pmatch->rm_eo = -1;
1348 for (p = opt->pattern_list; p; p = p->next) {
1350 case GREP_PATTERN: /* atom */
1351 case GREP_PATTERN_HEAD:
1352 case GREP_PATTERN_BODY:
1353 hit |= match_next_pattern(p, bol, eol, ctx,
1364 static void show_line(struct grep_opt *opt, char *bol, char *eol,
1365 const char *name, unsigned lno, char sign)
1367 int rest = eol - bol;
1368 const char *match_color, *line_color = NULL;
1370 if (opt->file_break && opt->last_shown == 0) {
1371 if (opt->show_hunk_mark)
1372 opt->output(opt, "\n", 1);
1373 } else if (opt->pre_context || opt->post_context || opt->funcbody) {
1374 if (opt->last_shown == 0) {
1375 if (opt->show_hunk_mark) {
1376 output_color(opt, "--", 2, opt->color_sep);
1377 opt->output(opt, "\n", 1);
1379 } else if (lno > opt->last_shown + 1) {
1380 output_color(opt, "--", 2, opt->color_sep);
1381 opt->output(opt, "\n", 1);
1384 if (opt->heading && opt->last_shown == 0) {
1385 output_color(opt, name, strlen(name), opt->color_filename);
1386 opt->output(opt, "\n", 1);
1388 opt->last_shown = lno;
1390 if (!opt->heading && opt->pathname) {
1391 output_color(opt, name, strlen(name), opt->color_filename);
1392 output_sep(opt, sign);
1396 xsnprintf(buf, sizeof(buf), "%d", lno);
1397 output_color(opt, buf, strlen(buf), opt->color_lineno);
1398 output_sep(opt, sign);
1402 enum grep_context ctx = GREP_CONTEXT_BODY;
1407 match_color = opt->color_match_selected;
1409 match_color = opt->color_match_context;
1411 line_color = opt->color_selected;
1412 else if (sign == '-')
1413 line_color = opt->color_context;
1414 else if (sign == '=')
1415 line_color = opt->color_function;
1417 while (next_match(opt, bol, eol, ctx, &match, eflags)) {
1418 if (match.rm_so == match.rm_eo)
1421 output_color(opt, bol, match.rm_so, line_color);
1422 output_color(opt, bol + match.rm_so,
1423 match.rm_eo - match.rm_so, match_color);
1425 rest -= match.rm_eo;
1426 eflags = REG_NOTBOL;
1430 output_color(opt, bol, rest, line_color);
1431 opt->output(opt, "\n", 1);
1438 * This lock protects access to the gitattributes machinery, which is
1441 pthread_mutex_t grep_attr_mutex;
1443 static inline void grep_attr_lock(void)
1446 pthread_mutex_lock(&grep_attr_mutex);
1449 static inline void grep_attr_unlock(void)
1452 pthread_mutex_unlock(&grep_attr_mutex);
1456 * Same as git_attr_mutex, but protecting the thread-unsafe object db access.
1458 pthread_mutex_t grep_read_mutex;
1461 #define grep_attr_lock()
1462 #define grep_attr_unlock()
1465 static int match_funcname(struct grep_opt *opt, struct grep_source *gs, char *bol, char *eol)
1467 xdemitconf_t *xecfg = opt->priv;
1468 if (xecfg && !xecfg->find_func) {
1469 grep_source_load_driver(gs);
1470 if (gs->driver->funcname.pattern) {
1471 const struct userdiff_funcname *pe = &gs->driver->funcname;
1472 xdiff_set_find_func(xecfg, pe->pattern, pe->cflags);
1474 xecfg = opt->priv = NULL;
1480 return xecfg->find_func(bol, eol - bol, buf, 1,
1481 xecfg->find_func_priv) >= 0;
1486 if (isalpha(*bol) || *bol == '_' || *bol == '$')
1491 static void show_funcname_line(struct grep_opt *opt, struct grep_source *gs,
1492 char *bol, unsigned lno)
1494 while (bol > gs->buf) {
1497 while (bol > gs->buf && bol[-1] != '\n')
1501 if (lno <= opt->last_shown)
1504 if (match_funcname(opt, gs, bol, eol)) {
1505 show_line(opt, bol, eol, gs->name, lno, '=');
1511 static int is_empty_line(const char *bol, const char *eol);
1513 static void show_pre_context(struct grep_opt *opt, struct grep_source *gs,
1514 char *bol, char *end, unsigned lno)
1516 unsigned cur = lno, from = 1, funcname_lno = 0, orig_from;
1517 int funcname_needed = !!opt->funcname, comment_needed = 0;
1519 if (opt->pre_context < lno)
1520 from = lno - opt->pre_context;
1521 if (from <= opt->last_shown)
1522 from = opt->last_shown + 1;
1524 if (opt->funcbody) {
1525 if (match_funcname(opt, gs, bol, end))
1528 funcname_needed = 1;
1529 from = opt->last_shown + 1;
1533 while (bol > gs->buf && cur > from) {
1534 char *next_bol = bol;
1537 while (bol > gs->buf && bol[-1] != '\n')
1540 if (comment_needed && (is_empty_line(bol, eol) ||
1541 match_funcname(opt, gs, bol, eol))) {
1550 if (funcname_needed && match_funcname(opt, gs, bol, eol)) {
1552 funcname_needed = 0;
1560 /* We need to look even further back to find a function signature. */
1561 if (opt->funcname && funcname_needed)
1562 show_funcname_line(opt, gs, bol, cur);
1566 char *eol = bol, sign = (cur == funcname_lno) ? '=' : '-';
1568 while (*eol != '\n')
1570 show_line(opt, bol, eol, gs->name, cur, sign);
1576 static int should_lookahead(struct grep_opt *opt)
1581 return 0; /* punt for too complex stuff */
1584 for (p = opt->pattern_list; p; p = p->next) {
1585 if (p->token != GREP_PATTERN)
1586 return 0; /* punt for "header only" and stuff */
1591 static int look_ahead(struct grep_opt *opt,
1592 unsigned long *left_p,
1596 unsigned lno = *lno_p;
1599 char *sp, *last_bol;
1600 regoff_t earliest = -1;
1602 for (p = opt->pattern_list; p; p = p->next) {
1606 hit = patmatch(p, bol, bol + *left_p, &m, 0);
1607 if (!hit || m.rm_so < 0 || m.rm_eo < 0)
1609 if (earliest < 0 || m.rm_so < earliest)
1614 *bol_p = bol + *left_p;
1618 for (sp = bol + earliest; bol < sp && sp[-1] != '\n'; sp--)
1619 ; /* find the beginning of the line */
1622 for (sp = bol; sp < last_bol; sp++) {
1626 *left_p -= last_bol - bol;
1632 static int fill_textconv_grep(struct userdiff_driver *driver,
1633 struct grep_source *gs)
1635 struct diff_filespec *df;
1639 if (!driver || !driver->textconv)
1640 return grep_source_load(gs);
1643 * The textconv interface is intimately tied to diff_filespecs, so we
1644 * have to pretend to be one. If we could unify the grep_source
1645 * and diff_filespec structs, this mess could just go away.
1647 df = alloc_filespec(gs->path);
1649 case GREP_SOURCE_OID:
1650 fill_filespec(df, gs->identifier, 1, 0100644);
1652 case GREP_SOURCE_FILE:
1653 fill_filespec(df, &null_oid, 0, 0100644);
1656 die("BUG: attempt to textconv something without a path?");
1660 * fill_textconv is not remotely thread-safe; it may load objects
1661 * behind the scenes, and it modifies the global diff tempfile
1665 size = fill_textconv(driver, df, &buf);
1670 * The normal fill_textconv usage by the diff machinery would just keep
1671 * the textconv'd buf separate from the diff_filespec. But much of the
1672 * grep code passes around a grep_source and assumes that its "buf"
1673 * pointer is the beginning of the thing we are searching. So let's
1674 * install our textconv'd version into the grep_source, taking care not
1675 * to leak any existing buffer.
1677 grep_source_clear_data(gs);
1684 static int is_empty_line(const char *bol, const char *eol)
1686 while (bol < eol && isspace(*bol))
1691 static int grep_source_1(struct grep_opt *opt, struct grep_source *gs, int collect_hits)
1694 char *peek_bol = NULL;
1697 unsigned last_hit = 0;
1698 int binary_match_only = 0;
1700 int try_lookahead = 0;
1701 int show_function = 0;
1702 struct userdiff_driver *textconv = NULL;
1703 enum grep_context ctx = GREP_CONTEXT_HEAD;
1707 opt->output = std_output;
1709 if (opt->pre_context || opt->post_context || opt->file_break ||
1711 /* Show hunk marks, except for the first file. */
1712 if (opt->last_shown)
1713 opt->show_hunk_mark = 1;
1715 * If we're using threads then we can't easily identify
1716 * the first file. Always put hunk marks in that case
1717 * and skip the very first one later in work_done().
1719 if (opt->output != std_output)
1720 opt->show_hunk_mark = 1;
1722 opt->last_shown = 0;
1724 if (opt->allow_textconv) {
1725 grep_source_load_driver(gs);
1727 * We might set up the shared textconv cache data here, which
1728 * is not thread-safe.
1731 textconv = userdiff_get_textconv(gs->driver);
1736 * We know the result of a textconv is text, so we only have to care
1737 * about binary handling if we are not using it.
1740 switch (opt->binary) {
1741 case GREP_BINARY_DEFAULT:
1742 if (grep_source_is_binary(gs))
1743 binary_match_only = 1;
1745 case GREP_BINARY_NOMATCH:
1746 if (grep_source_is_binary(gs))
1747 return 0; /* Assume unmatch */
1749 case GREP_BINARY_TEXT:
1752 die("BUG: unknown binary handling mode");
1756 memset(&xecfg, 0, sizeof(xecfg));
1759 try_lookahead = should_lookahead(opt);
1761 if (fill_textconv_grep(textconv, gs) < 0)
1771 * look_ahead() skips quickly to the line that possibly
1772 * has the next hit; don't call it if we need to do
1773 * something more than just skipping the current line
1774 * in response to an unmatch for the current line. E.g.
1775 * inside a post-context window, we will show the current
1776 * line as a context around the previous hit when it
1781 && (show_function ||
1782 lno <= last_hit + opt->post_context))
1783 && look_ahead(opt, &left, &lno, &bol))
1785 eol = end_of_line(bol, &left);
1789 if ((ctx == GREP_CONTEXT_HEAD) && (eol == bol))
1790 ctx = GREP_CONTEXT_BODY;
1792 hit = match_line(opt, bol, eol, ctx, collect_hits);
1798 /* "grep -v -e foo -e bla" should list lines
1799 * that do not have either, so inversion should
1804 if (opt->unmatch_name_only) {
1811 if (opt->status_only)
1813 if (opt->name_only) {
1814 show_name(opt, gs->name);
1819 if (binary_match_only) {
1820 opt->output(opt, "Binary file ", 12);
1821 output_color(opt, gs->name, strlen(gs->name),
1822 opt->color_filename);
1823 opt->output(opt, " matches\n", 9);
1826 /* Hit at this line. If we haven't shown the
1827 * pre-context lines, we would need to show them.
1829 if (opt->pre_context || opt->funcbody)
1830 show_pre_context(opt, gs, bol, eol, lno);
1831 else if (opt->funcname)
1832 show_funcname_line(opt, gs, bol, lno);
1833 show_line(opt, bol, eol, gs->name, lno, ':');
1839 if (show_function && (!peek_bol || peek_bol < bol)) {
1840 unsigned long peek_left = left;
1841 char *peek_eol = eol;
1844 * Trailing empty lines are not interesting.
1845 * Peek past them to see if they belong to the
1846 * body of the current function.
1849 while (is_empty_line(peek_bol, peek_eol)) {
1850 peek_bol = peek_eol + 1;
1851 peek_eol = end_of_line(peek_bol, &peek_left);
1854 if (match_funcname(opt, gs, peek_bol, peek_eol))
1857 if (show_function ||
1858 (last_hit && lno <= last_hit + opt->post_context)) {
1859 /* If the last hit is within the post context,
1860 * we need to show this line.
1862 show_line(opt, bol, eol, gs->name, lno, '-');
1876 if (opt->status_only)
1877 return opt->unmatch_name_only;
1878 if (opt->unmatch_name_only) {
1879 /* We did not see any hit, so we want to show this */
1880 show_name(opt, gs->name);
1884 xdiff_clear_find_func(&xecfg);
1888 * The real "grep -c foo *.c" gives many "bar.c:0" lines,
1889 * which feels mostly useless but sometimes useful. Maybe
1890 * make it another option? For now suppress them.
1892 if (opt->count && count) {
1894 if (opt->pathname) {
1895 output_color(opt, gs->name, strlen(gs->name),
1896 opt->color_filename);
1897 output_sep(opt, ':');
1899 xsnprintf(buf, sizeof(buf), "%u\n", count);
1900 opt->output(opt, buf, strlen(buf));
1906 static void clr_hit_marker(struct grep_expr *x)
1908 /* All-hit markers are meaningful only at the very top level
1913 if (x->node != GREP_NODE_OR)
1915 x->u.binary.left->hit = 0;
1916 x = x->u.binary.right;
1920 static int chk_hit_marker(struct grep_expr *x)
1922 /* Top level nodes have hit markers. See if they all are hits */
1924 if (x->node != GREP_NODE_OR)
1926 if (!x->u.binary.left->hit)
1928 x = x->u.binary.right;
1932 int grep_source(struct grep_opt *opt, struct grep_source *gs)
1935 * we do not have to do the two-pass grep when we do not check
1936 * buffer-wide "all-match".
1938 if (!opt->all_match)
1939 return grep_source_1(opt, gs, 0);
1941 /* Otherwise the toplevel "or" terms hit a bit differently.
1942 * We first clear hit markers from them.
1944 clr_hit_marker(opt->pattern_expression);
1945 grep_source_1(opt, gs, 1);
1947 if (!chk_hit_marker(opt->pattern_expression))
1950 return grep_source_1(opt, gs, 0);
1953 int grep_buffer(struct grep_opt *opt, char *buf, unsigned long size)
1955 struct grep_source gs;
1958 grep_source_init(&gs, GREP_SOURCE_BUF, NULL, NULL, NULL);
1962 r = grep_source(opt, &gs);
1964 grep_source_clear(&gs);
1968 void grep_source_init(struct grep_source *gs, enum grep_source_type type,
1969 const char *name, const char *path,
1970 const void *identifier)
1973 gs->name = xstrdup_or_null(name);
1974 gs->path = xstrdup_or_null(path);
1980 case GREP_SOURCE_FILE:
1981 gs->identifier = xstrdup(identifier);
1983 case GREP_SOURCE_OID:
1984 gs->identifier = oiddup(identifier);
1986 case GREP_SOURCE_BUF:
1987 gs->identifier = NULL;
1992 void grep_source_clear(struct grep_source *gs)
1994 FREE_AND_NULL(gs->name);
1995 FREE_AND_NULL(gs->path);
1996 FREE_AND_NULL(gs->identifier);
1997 grep_source_clear_data(gs);
2000 void grep_source_clear_data(struct grep_source *gs)
2003 case GREP_SOURCE_FILE:
2004 case GREP_SOURCE_OID:
2005 FREE_AND_NULL(gs->buf);
2008 case GREP_SOURCE_BUF:
2009 /* leave user-provided buf intact */
2014 static int grep_source_load_oid(struct grep_source *gs)
2016 enum object_type type;
2019 gs->buf = read_object_file(gs->identifier, &type, &gs->size);
2023 return error(_("'%s': unable to read %s"),
2025 oid_to_hex(gs->identifier));
2029 static int grep_source_load_file(struct grep_source *gs)
2031 const char *filename = gs->identifier;
2037 if (lstat(filename, &st) < 0) {
2039 if (errno != ENOENT)
2040 error_errno(_("failed to stat '%s'"), filename);
2043 if (!S_ISREG(st.st_mode))
2045 size = xsize_t(st.st_size);
2046 i = open(filename, O_RDONLY);
2049 data = xmallocz(size);
2050 if (st.st_size != read_in_full(i, data, size)) {
2051 error_errno(_("'%s': short read"), filename);
2063 static int grep_source_load(struct grep_source *gs)
2069 case GREP_SOURCE_FILE:
2070 return grep_source_load_file(gs);
2071 case GREP_SOURCE_OID:
2072 return grep_source_load_oid(gs);
2073 case GREP_SOURCE_BUF:
2074 return gs->buf ? 0 : -1;
2076 die("BUG: invalid grep_source type to load");
2079 void grep_source_load_driver(struct grep_source *gs)
2086 gs->driver = userdiff_find_by_path(gs->path);
2088 gs->driver = userdiff_find_by_name("default");
2092 static int grep_source_is_binary(struct grep_source *gs)
2094 grep_source_load_driver(gs);
2095 if (gs->driver->binary != -1)
2096 return gs->driver->binary;
2098 if (!grep_source_load(gs))
2099 return buffer_is_binary(gs->buf, gs->size);