4 #include "object-store.h"
6 #include "xdiff-interface.h"
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);
17 static void std_output(struct grep_opt *opt, const void *buf, size_t size)
19 fwrite(buf, size, 1, stdout);
22 static struct grep_opt grep_defaults = {
26 .pattern_type_option = GREP_PATTERN_TYPE_UNSPECIFIED,
28 [GREP_COLOR_CONTEXT] = "",
29 [GREP_COLOR_FILENAME] = "",
30 [GREP_COLOR_FUNCTION] = "",
31 [GREP_COLOR_LINENO] = "",
32 [GREP_COLOR_COLUMNNO] = "",
33 [GREP_COLOR_MATCH_CONTEXT] = GIT_COLOR_BOLD_RED,
34 [GREP_COLOR_MATCH_SELECTED] = GIT_COLOR_BOLD_RED,
35 [GREP_COLOR_SELECTED] = "",
36 [GREP_COLOR_SEP] = GIT_COLOR_CYAN,
44 static pcre2_general_context *pcre2_global_context;
46 static void *pcre2_malloc(PCRE2_SIZE size, MAYBE_UNUSED void *memory_data)
51 static void pcre2_free(void *pointer, MAYBE_UNUSED void *memory_data)
57 static const char *color_grep_slots[] = {
58 [GREP_COLOR_CONTEXT] = "context",
59 [GREP_COLOR_FILENAME] = "filename",
60 [GREP_COLOR_FUNCTION] = "function",
61 [GREP_COLOR_LINENO] = "lineNumber",
62 [GREP_COLOR_COLUMNNO] = "column",
63 [GREP_COLOR_MATCH_CONTEXT] = "matchContext",
64 [GREP_COLOR_MATCH_SELECTED] = "matchSelected",
65 [GREP_COLOR_SELECTED] = "selected",
66 [GREP_COLOR_SEP] = "separator",
69 static int parse_pattern_type_arg(const char *opt, const char *arg)
71 if (!strcmp(arg, "default"))
72 return GREP_PATTERN_TYPE_UNSPECIFIED;
73 else if (!strcmp(arg, "basic"))
74 return GREP_PATTERN_TYPE_BRE;
75 else if (!strcmp(arg, "extended"))
76 return GREP_PATTERN_TYPE_ERE;
77 else if (!strcmp(arg, "fixed"))
78 return GREP_PATTERN_TYPE_FIXED;
79 else if (!strcmp(arg, "perl"))
80 return GREP_PATTERN_TYPE_PCRE;
81 die("bad %s argument: %s", opt, arg);
84 define_list_config_array_extra(color_grep_slots, {"match"});
87 * Read the configuration file once and store it in
88 * the grep_defaults template.
90 int grep_config(const char *var, const char *value, void *cb)
92 struct grep_opt *opt = &grep_defaults;
95 if (userdiff_config(var, value) < 0)
99 * The instance of grep_opt that we set up here is copied by
100 * grep_init() to be used by each individual invocation.
101 * When populating a new field of this structure here, be
102 * sure to think about ownership -- e.g., you might need to
103 * override the shallow copy in grep_init() with a deep copy.
106 if (!strcmp(var, "grep.extendedregexp")) {
107 opt->extended_regexp_option = git_config_bool(var, value);
111 if (!strcmp(var, "grep.patterntype")) {
112 opt->pattern_type_option = parse_pattern_type_arg(var, value);
116 if (!strcmp(var, "grep.linenumber")) {
117 opt->linenum = git_config_bool(var, value);
120 if (!strcmp(var, "grep.column")) {
121 opt->columnnum = git_config_bool(var, value);
125 if (!strcmp(var, "grep.fullname")) {
126 opt->relative = !git_config_bool(var, value);
130 if (!strcmp(var, "color.grep"))
131 opt->color = git_config_colorbool(var, value);
132 if (!strcmp(var, "color.grep.match")) {
133 if (grep_config("color.grep.matchcontext", value, cb) < 0)
135 if (grep_config("color.grep.matchselected", value, cb) < 0)
137 } else if (skip_prefix(var, "color.grep.", &slot)) {
138 int i = LOOKUP_CONFIG(color_grep_slots, slot);
143 color = opt->colors[i];
145 return config_error_nonbool(var);
146 return color_parse(value, color);
152 * Initialize one instance of grep_opt and copy the
153 * default values from the template we read the configuration
154 * information in an earlier call to git_config(grep_config).
156 * If using PCRE, make sure that the library is configured
157 * to use the same allocator as Git (e.g. nedmalloc on Windows).
159 * Any allocated memory needs to be released in grep_destroy().
161 void grep_init(struct grep_opt *opt, struct repository *repo, const char *prefix)
163 #if defined(USE_LIBPCRE2)
164 if (!pcre2_global_context)
165 pcre2_global_context = pcre2_general_context_create(
166 pcre2_malloc, pcre2_free, NULL);
170 pcre_malloc = malloc;
174 *opt = grep_defaults;
177 opt->prefix = prefix;
178 opt->prefix_length = (prefix && *prefix) ? strlen(prefix) : 0;
179 opt->pattern_tail = &opt->pattern_list;
180 opt->header_tail = &opt->header_list;
183 void grep_destroy(void)
186 pcre2_general_context_free(pcre2_global_context);
190 static void grep_set_pattern_type_option(enum grep_pattern_type pattern_type, struct grep_opt *opt)
193 * When committing to the pattern type by setting the relevant
194 * fields in grep_opt it's generally not necessary to zero out
195 * the fields we're not choosing, since they won't have been
196 * set by anything. The extended_regexp_option field is the
197 * only exception to this.
199 * This is because in the process of parsing grep.patternType
200 * & grep.extendedRegexp we set opt->pattern_type_option and
201 * opt->extended_regexp_option, respectively. We then
202 * internally use opt->extended_regexp_option to see if we're
203 * compiling an ERE. It must be unset if that's not actually
206 if (pattern_type != GREP_PATTERN_TYPE_ERE &&
207 opt->extended_regexp_option)
208 opt->extended_regexp_option = 0;
210 switch (pattern_type) {
211 case GREP_PATTERN_TYPE_UNSPECIFIED:
214 case GREP_PATTERN_TYPE_BRE:
217 case GREP_PATTERN_TYPE_ERE:
218 opt->extended_regexp_option = 1;
221 case GREP_PATTERN_TYPE_FIXED:
225 case GREP_PATTERN_TYPE_PCRE:
230 * It's important that pcre1 always be assigned to
231 * even when there's no USE_LIBPCRE* defined. We still
232 * call the PCRE stub function, it just dies with
233 * "cannot use Perl-compatible regexes[...]".
241 void grep_commit_pattern_type(enum grep_pattern_type pattern_type, struct grep_opt *opt)
243 if (pattern_type != GREP_PATTERN_TYPE_UNSPECIFIED)
244 grep_set_pattern_type_option(pattern_type, opt);
245 else if (opt->pattern_type_option != GREP_PATTERN_TYPE_UNSPECIFIED)
246 grep_set_pattern_type_option(opt->pattern_type_option, opt);
247 else if (opt->extended_regexp_option)
249 * This branch *must* happen after setting from the
250 * opt->pattern_type_option above, we don't want
251 * grep.extendedRegexp to override grep.patternType!
253 grep_set_pattern_type_option(GREP_PATTERN_TYPE_ERE, opt);
256 static struct grep_pat *create_grep_pat(const char *pat, size_t patlen,
257 const char *origin, int no,
258 enum grep_pat_token t,
259 enum grep_header_field field)
261 struct grep_pat *p = xcalloc(1, sizeof(*p));
262 p->pattern = xmemdupz(pat, patlen);
263 p->patternlen = patlen;
271 static void do_append_grep_pat(struct grep_pat ***tail, struct grep_pat *p)
278 case GREP_PATTERN: /* atom */
279 case GREP_PATTERN_HEAD:
280 case GREP_PATTERN_BODY:
282 struct grep_pat *new_pat;
284 char *cp = p->pattern + p->patternlen, *nl = NULL;
285 while (++len <= p->patternlen) {
286 if (*(--cp) == '\n') {
293 new_pat = create_grep_pat(nl + 1, len - 1, p->origin,
294 p->no, p->token, p->field);
295 new_pat->next = p->next;
297 *tail = &new_pat->next;
300 p->patternlen -= len;
308 void append_header_grep_pattern(struct grep_opt *opt,
309 enum grep_header_field field, const char *pat)
311 struct grep_pat *p = create_grep_pat(pat, strlen(pat), "header", 0,
312 GREP_PATTERN_HEAD, field);
313 if (field == GREP_HEADER_REFLOG)
314 opt->use_reflog_filter = 1;
315 do_append_grep_pat(&opt->header_tail, p);
318 void append_grep_pattern(struct grep_opt *opt, const char *pat,
319 const char *origin, int no, enum grep_pat_token t)
321 append_grep_pat(opt, pat, strlen(pat), origin, no, t);
324 void append_grep_pat(struct grep_opt *opt, const char *pat, size_t patlen,
325 const char *origin, int no, enum grep_pat_token t)
327 struct grep_pat *p = create_grep_pat(pat, patlen, origin, no, t, 0);
328 do_append_grep_pat(&opt->pattern_tail, p);
331 struct grep_opt *grep_opt_dup(const struct grep_opt *opt)
333 struct grep_pat *pat;
334 struct grep_opt *ret = xmalloc(sizeof(struct grep_opt));
337 ret->pattern_list = NULL;
338 ret->pattern_tail = &ret->pattern_list;
340 for(pat = opt->pattern_list; pat != NULL; pat = pat->next)
342 if(pat->token == GREP_PATTERN_HEAD)
343 append_header_grep_pattern(ret, pat->field,
346 append_grep_pat(ret, pat->pattern, pat->patternlen,
347 pat->origin, pat->no, pat->token);
353 static NORETURN void compile_regexp_failed(const struct grep_pat *p,
359 xsnprintf(where, sizeof(where), "In '%s' at %d, ", p->origin, p->no);
361 xsnprintf(where, sizeof(where), "%s, ", p->origin);
365 die("%s'%s': %s", where, p->pattern, error);
368 static int is_fixed(const char *s, size_t len)
372 for (i = 0; i < len; i++) {
373 if (is_regex_special(s[i]))
381 static void compile_pcre1_regexp(struct grep_pat *p, const struct grep_opt *opt)
385 int options = PCRE_MULTILINE;
386 int study_options = 0;
388 if (opt->ignore_case) {
389 if (!opt->ignore_locale && has_non_ascii(p->pattern))
390 p->pcre1_tables = pcre_maketables();
391 options |= PCRE_CASELESS;
393 if (!opt->ignore_locale && is_utf8_locale() && has_non_ascii(p->pattern))
394 options |= PCRE_UTF8;
396 p->pcre1_regexp = pcre_compile(p->pattern, options, &error, &erroffset,
398 if (!p->pcre1_regexp)
399 compile_regexp_failed(p, error);
401 #if defined(PCRE_CONFIG_JIT) && !defined(NO_LIBPCRE1_JIT)
402 pcre_config(PCRE_CONFIG_JIT, &p->pcre1_jit_on);
405 study_options = PCRE_STUDY_JIT_COMPILE;
408 p->pcre1_extra_info = pcre_study(p->pcre1_regexp, study_options, &error);
409 if (!p->pcre1_extra_info && error)
413 static int pcre1match(struct grep_pat *p, const char *line, const char *eol,
414 regmatch_t *match, int eflags)
416 int ovector[30], ret, flags = PCRE_NO_UTF8_CHECK;
418 if (eflags & REG_NOTBOL)
419 flags |= PCRE_NOTBOL;
421 ret = pcre_exec(p->pcre1_regexp, p->pcre1_extra_info, line,
422 eol - line, 0, flags, ovector,
423 ARRAY_SIZE(ovector));
425 if (ret < 0 && ret != PCRE_ERROR_NOMATCH)
426 die("pcre_exec failed with error code %d", ret);
429 match->rm_so = ovector[0];
430 match->rm_eo = ovector[1];
436 static void free_pcre1_regexp(struct grep_pat *p)
438 pcre_free(p->pcre1_regexp);
439 #ifdef PCRE_CONFIG_JIT
441 pcre_free_study(p->pcre1_extra_info);
444 pcre_free(p->pcre1_extra_info);
445 pcre_free((void *)p->pcre1_tables);
447 #else /* !USE_LIBPCRE1 */
448 static void compile_pcre1_regexp(struct grep_pat *p, const struct grep_opt *opt)
450 die("cannot use Perl-compatible regexes when not compiled with USE_LIBPCRE");
453 static int pcre1match(struct grep_pat *p, const char *line, const char *eol,
454 regmatch_t *match, int eflags)
459 static void free_pcre1_regexp(struct grep_pat *p)
462 #endif /* !USE_LIBPCRE1 */
465 static void compile_pcre2_pattern(struct grep_pat *p, const struct grep_opt *opt)
468 PCRE2_UCHAR errbuf[256];
469 PCRE2_SIZE erroffset;
470 int options = PCRE2_MULTILINE;
477 p->pcre2_compile_context = NULL;
479 /* pcre2_global_context is initialized in append_grep_pattern */
480 if (opt->ignore_case) {
481 if (!opt->ignore_locale && has_non_ascii(p->pattern)) {
482 if (!pcre2_global_context)
483 BUG("pcre2_global_context uninitialized");
484 p->pcre2_tables = pcre2_maketables(pcre2_global_context);
485 p->pcre2_compile_context = pcre2_compile_context_create(NULL);
486 pcre2_set_character_tables(p->pcre2_compile_context,
489 options |= PCRE2_CASELESS;
491 if (!opt->ignore_locale && is_utf8_locale() && has_non_ascii(p->pattern) &&
492 !(!opt->ignore_case && (p->fixed || p->is_fixed)))
493 options |= PCRE2_UTF;
495 p->pcre2_pattern = pcre2_compile((PCRE2_SPTR)p->pattern,
496 p->patternlen, options, &error, &erroffset,
497 p->pcre2_compile_context);
499 if (p->pcre2_pattern) {
500 p->pcre2_match_data = pcre2_match_data_create_from_pattern(p->pcre2_pattern, NULL);
501 if (!p->pcre2_match_data)
502 die("Couldn't allocate PCRE2 match data");
504 pcre2_get_error_message(error, errbuf, sizeof(errbuf));
505 compile_regexp_failed(p, (const char *)&errbuf);
508 pcre2_config(PCRE2_CONFIG_JIT, &p->pcre2_jit_on);
509 if (p->pcre2_jit_on) {
510 jitret = pcre2_jit_compile(p->pcre2_pattern, PCRE2_JIT_COMPLETE);
512 die("Couldn't JIT the PCRE2 pattern '%s', got '%d'\n", p->pattern, jitret);
515 * The pcre2_config(PCRE2_CONFIG_JIT, ...) call just
516 * tells us whether the library itself supports JIT,
517 * but to see whether we're going to be actually using
518 * JIT we need to extract PCRE2_INFO_JITSIZE from the
519 * pattern *after* we do pcre2_jit_compile() above.
521 * This is because if the pattern contains the
522 * (*NO_JIT) verb (see pcre2syntax(3))
523 * pcre2_jit_compile() will exit early with 0. If we
524 * then proceed to call pcre2_jit_match() further down
525 * the line instead of pcre2_match() we'll either
526 * segfault (pre PCRE 10.31) or run into a fatal error
529 patinforet = pcre2_pattern_info(p->pcre2_pattern, PCRE2_INFO_JITSIZE, &jitsizearg);
531 BUG("pcre2_pattern_info() failed: %d", patinforet);
532 if (jitsizearg == 0) {
539 static int pcre2match(struct grep_pat *p, const char *line, const char *eol,
540 regmatch_t *match, int eflags)
544 PCRE2_UCHAR errbuf[256];
546 if (eflags & REG_NOTBOL)
547 flags |= PCRE2_NOTBOL;
550 ret = pcre2_jit_match(p->pcre2_pattern, (unsigned char *)line,
551 eol - line, 0, flags, p->pcre2_match_data,
554 ret = pcre2_match(p->pcre2_pattern, (unsigned char *)line,
555 eol - line, 0, flags, p->pcre2_match_data,
558 if (ret < 0 && ret != PCRE2_ERROR_NOMATCH) {
559 pcre2_get_error_message(ret, errbuf, sizeof(errbuf));
560 die("%s failed with error code %d: %s",
561 (p->pcre2_jit_on ? "pcre2_jit_match" : "pcre2_match"), ret,
565 ovector = pcre2_get_ovector_pointer(p->pcre2_match_data);
567 match->rm_so = (int)ovector[0];
568 match->rm_eo = (int)ovector[1];
574 static void free_pcre2_pattern(struct grep_pat *p)
576 pcre2_compile_context_free(p->pcre2_compile_context);
577 pcre2_code_free(p->pcre2_pattern);
578 pcre2_match_data_free(p->pcre2_match_data);
579 free((void *)p->pcre2_tables);
581 #else /* !USE_LIBPCRE2 */
582 static void compile_pcre2_pattern(struct grep_pat *p, const struct grep_opt *opt)
585 * Unreachable until USE_LIBPCRE2 becomes synonymous with
586 * USE_LIBPCRE. See the sibling comment in
587 * grep_set_pattern_type_option().
589 die("cannot use Perl-compatible regexes when not compiled with USE_LIBPCRE");
592 static int pcre2match(struct grep_pat *p, const char *line, const char *eol,
593 regmatch_t *match, int eflags)
598 static void free_pcre2_pattern(struct grep_pat *p)
602 static void compile_fixed_regexp(struct grep_pat *p, struct grep_opt *opt)
604 struct strbuf sb = STRBUF_INIT;
608 basic_regex_quote_buf(&sb, p->pattern);
609 if (opt->ignore_case)
610 regflags |= REG_ICASE;
611 err = regcomp(&p->regexp, sb.buf, regflags);
615 regerror(err, &p->regexp, errbuf, sizeof(errbuf));
616 compile_regexp_failed(p, errbuf);
619 #endif /* !USE_LIBPCRE2 */
621 static void compile_regexp(struct grep_pat *p, struct grep_opt *opt)
624 int regflags = REG_NEWLINE;
626 p->word_regexp = opt->word_regexp;
627 p->ignore_case = opt->ignore_case;
628 p->fixed = opt->fixed;
630 if (memchr(p->pattern, 0, p->patternlen) && !opt->pcre2)
631 die(_("given pattern contains NULL byte (via -f <file>). This is only supported with -P under PCRE v2"));
633 p->is_fixed = is_fixed(p->pattern, p->patternlen);
635 if (!p->fixed && !p->is_fixed) {
636 const char *no_jit = "(*NO_JIT)";
637 const int no_jit_len = strlen(no_jit);
638 if (starts_with(p->pattern, no_jit) &&
639 is_fixed(p->pattern + no_jit_len,
640 p->patternlen - no_jit_len))
644 if (p->fixed || p->is_fixed) {
648 compile_pcre2_pattern(p, opt);
651 * E.g. t7811-grep-open.sh relies on the
652 * pattern being restored.
654 char *old_pattern = p->pattern;
655 size_t old_patternlen = p->patternlen;
656 struct strbuf sb = STRBUF_INIT;
659 * There is the PCRE2_LITERAL flag, but it's
660 * only in PCRE v2 10.30 and later. Needing to
661 * ifdef our way around that and dealing with
662 * it + PCRE2_MULTILINE being an error is more
663 * complex than just quoting this ourselves.
665 strbuf_add(&sb, "\\Q", 2);
666 strbuf_add(&sb, p->pattern, p->patternlen);
667 strbuf_add(&sb, "\\E", 2);
670 p->patternlen = sb.len;
671 compile_pcre2_pattern(p, opt);
672 p->pattern = old_pattern;
673 p->patternlen = old_patternlen;
676 #else /* !USE_LIBPCRE2 */
677 compile_fixed_regexp(p, opt);
678 #endif /* !USE_LIBPCRE2 */
683 compile_pcre2_pattern(p, opt);
688 compile_pcre1_regexp(p, opt);
693 regflags |= REG_ICASE;
694 if (opt->extended_regexp_option)
695 regflags |= REG_EXTENDED;
696 err = regcomp(&p->regexp, p->pattern, regflags);
699 regerror(err, &p->regexp, errbuf, 1024);
700 compile_regexp_failed(p, errbuf);
704 static struct grep_expr *compile_pattern_or(struct grep_pat **);
705 static struct grep_expr *compile_pattern_atom(struct grep_pat **list)
714 case GREP_PATTERN: /* atom */
715 case GREP_PATTERN_HEAD:
716 case GREP_PATTERN_BODY:
717 x = xcalloc(1, sizeof (struct grep_expr));
718 x->node = GREP_NODE_ATOM;
722 case GREP_OPEN_PAREN:
724 x = compile_pattern_or(list);
725 if (!*list || (*list)->token != GREP_CLOSE_PAREN)
726 die("unmatched parenthesis");
727 *list = (*list)->next;
734 static struct grep_expr *compile_pattern_not(struct grep_pat **list)
745 die("--not not followed by pattern expression");
747 x = xcalloc(1, sizeof (struct grep_expr));
748 x->node = GREP_NODE_NOT;
749 x->u.unary = compile_pattern_not(list);
751 die("--not followed by non pattern expression");
754 return compile_pattern_atom(list);
758 static struct grep_expr *compile_pattern_and(struct grep_pat **list)
761 struct grep_expr *x, *y, *z;
763 x = compile_pattern_not(list);
765 if (p && p->token == GREP_AND) {
767 die("--and not followed by pattern expression");
769 y = compile_pattern_and(list);
771 die("--and not followed by pattern expression");
772 z = xcalloc(1, sizeof (struct grep_expr));
773 z->node = GREP_NODE_AND;
774 z->u.binary.left = x;
775 z->u.binary.right = y;
781 static struct grep_expr *compile_pattern_or(struct grep_pat **list)
784 struct grep_expr *x, *y, *z;
786 x = compile_pattern_and(list);
788 if (x && p && p->token != GREP_CLOSE_PAREN) {
789 y = compile_pattern_or(list);
791 die("not a pattern expression %s", p->pattern);
792 z = xcalloc(1, sizeof (struct grep_expr));
793 z->node = GREP_NODE_OR;
794 z->u.binary.left = x;
795 z->u.binary.right = y;
801 static struct grep_expr *compile_pattern_expr(struct grep_pat **list)
803 return compile_pattern_or(list);
806 static struct grep_expr *grep_true_expr(void)
808 struct grep_expr *z = xcalloc(1, sizeof(*z));
809 z->node = GREP_NODE_TRUE;
813 static struct grep_expr *grep_or_expr(struct grep_expr *left, struct grep_expr *right)
815 struct grep_expr *z = xcalloc(1, sizeof(*z));
816 z->node = GREP_NODE_OR;
817 z->u.binary.left = left;
818 z->u.binary.right = right;
822 static struct grep_expr *prep_header_patterns(struct grep_opt *opt)
825 struct grep_expr *header_expr;
826 struct grep_expr *(header_group[GREP_HEADER_FIELD_MAX]);
827 enum grep_header_field fld;
829 if (!opt->header_list)
832 for (p = opt->header_list; p; p = p->next) {
833 if (p->token != GREP_PATTERN_HEAD)
834 BUG("a non-header pattern in grep header list.");
835 if (p->field < GREP_HEADER_FIELD_MIN ||
836 GREP_HEADER_FIELD_MAX <= p->field)
837 BUG("unknown header field %d", p->field);
838 compile_regexp(p, opt);
841 for (fld = 0; fld < GREP_HEADER_FIELD_MAX; fld++)
842 header_group[fld] = NULL;
844 for (p = opt->header_list; p; p = p->next) {
846 struct grep_pat *pp = p;
848 h = compile_pattern_atom(&pp);
849 if (!h || pp != p->next)
850 BUG("malformed header expr");
851 if (!header_group[p->field]) {
852 header_group[p->field] = h;
855 header_group[p->field] = grep_or_expr(h, header_group[p->field]);
860 for (fld = 0; fld < GREP_HEADER_FIELD_MAX; fld++) {
861 if (!header_group[fld])
864 header_expr = grep_true_expr();
865 header_expr = grep_or_expr(header_group[fld], header_expr);
870 static struct grep_expr *grep_splice_or(struct grep_expr *x, struct grep_expr *y)
872 struct grep_expr *z = x;
875 assert(x->node == GREP_NODE_OR);
876 if (x->u.binary.right &&
877 x->u.binary.right->node == GREP_NODE_TRUE) {
878 x->u.binary.right = y;
881 x = x->u.binary.right;
886 void compile_grep_patterns(struct grep_opt *opt)
889 struct grep_expr *header_expr = prep_header_patterns(opt);
891 for (p = opt->pattern_list; p; p = p->next) {
893 case GREP_PATTERN: /* atom */
894 case GREP_PATTERN_HEAD:
895 case GREP_PATTERN_BODY:
896 compile_regexp(p, opt);
904 if (opt->all_match || header_expr)
906 else if (!opt->extended)
909 p = opt->pattern_list;
911 opt->pattern_expression = compile_pattern_expr(&p);
913 die("incomplete pattern expression: %s", p->pattern);
918 if (!opt->pattern_expression)
919 opt->pattern_expression = header_expr;
920 else if (opt->all_match)
921 opt->pattern_expression = grep_splice_or(header_expr,
922 opt->pattern_expression);
924 opt->pattern_expression = grep_or_expr(opt->pattern_expression,
929 static void free_pattern_expr(struct grep_expr *x)
936 free_pattern_expr(x->u.unary);
940 free_pattern_expr(x->u.binary.left);
941 free_pattern_expr(x->u.binary.right);
947 void free_grep_patterns(struct grep_opt *opt)
949 struct grep_pat *p, *n;
951 for (p = opt->pattern_list; p; p = n) {
954 case GREP_PATTERN: /* atom */
955 case GREP_PATTERN_HEAD:
956 case GREP_PATTERN_BODY:
958 free_pcre1_regexp(p);
959 else if (p->pcre2_pattern)
960 free_pcre2_pattern(p);
973 free_pattern_expr(opt->pattern_expression);
976 static char *end_of_line(char *cp, unsigned long *left)
978 unsigned long l = *left;
979 while (l && *cp != '\n') {
987 static int word_char(char ch)
989 return isalnum(ch) || ch == '_';
992 static void output_color(struct grep_opt *opt, const void *data, size_t size,
995 if (want_color(opt->color) && color && color[0]) {
996 opt->output(opt, color, strlen(color));
997 opt->output(opt, data, size);
998 opt->output(opt, GIT_COLOR_RESET, strlen(GIT_COLOR_RESET));
1000 opt->output(opt, data, size);
1003 static void output_sep(struct grep_opt *opt, char sign)
1005 if (opt->null_following_name)
1006 opt->output(opt, "\0", 1);
1008 output_color(opt, &sign, 1, opt->colors[GREP_COLOR_SEP]);
1011 static void show_name(struct grep_opt *opt, const char *name)
1013 output_color(opt, name, strlen(name), opt->colors[GREP_COLOR_FILENAME]);
1014 opt->output(opt, opt->null_following_name ? "\0" : "\n", 1);
1017 static int patmatch(struct grep_pat *p, char *line, char *eol,
1018 regmatch_t *match, int eflags)
1022 if (p->pcre1_regexp)
1023 hit = !pcre1match(p, line, eol, match, eflags);
1024 else if (p->pcre2_pattern)
1025 hit = !pcre2match(p, line, eol, match, eflags);
1027 hit = !regexec_buf(&p->regexp, line, eol - line, 1, match,
1033 static int strip_timestamp(char *bol, char **eol_p)
1038 while (bol < --eol) {
1052 } header_field[] = {
1054 { "committer ", 10 },
1058 static int match_one_pattern(struct grep_pat *p, char *bol, char *eol,
1059 enum grep_context ctx,
1060 regmatch_t *pmatch, int eflags)
1064 const char *start = bol;
1066 if ((p->token != GREP_PATTERN) &&
1067 ((p->token == GREP_PATTERN_HEAD) != (ctx == GREP_CONTEXT_HEAD)))
1070 if (p->token == GREP_PATTERN_HEAD) {
1073 assert(p->field < ARRAY_SIZE(header_field));
1074 field = header_field[p->field].field;
1075 len = header_field[p->field].len;
1076 if (strncmp(bol, field, len))
1080 case GREP_HEADER_AUTHOR:
1081 case GREP_HEADER_COMMITTER:
1082 saved_ch = strip_timestamp(bol, &eol);
1090 hit = patmatch(p, bol, eol, pmatch, eflags);
1092 if (hit && p->word_regexp) {
1093 if ((pmatch[0].rm_so < 0) ||
1094 (eol - bol) < pmatch[0].rm_so ||
1095 (pmatch[0].rm_eo < 0) ||
1096 (eol - bol) < pmatch[0].rm_eo)
1097 die("regexp returned nonsense");
1099 /* Match beginning must be either beginning of the
1100 * line, or at word boundary (i.e. the last char must
1101 * not be a word char). Similarly, match end must be
1102 * either end of the line, or at word boundary
1103 * (i.e. the next char must not be a word char).
1105 if ( ((pmatch[0].rm_so == 0) ||
1106 !word_char(bol[pmatch[0].rm_so-1])) &&
1107 ((pmatch[0].rm_eo == (eol-bol)) ||
1108 !word_char(bol[pmatch[0].rm_eo])) )
1113 /* Words consist of at least one character. */
1114 if (pmatch->rm_so == pmatch->rm_eo)
1117 if (!hit && pmatch[0].rm_so + bol + 1 < eol) {
1118 /* There could be more than one match on the
1119 * line, and the first match might not be
1120 * strict word match. But later ones could be!
1121 * Forward to the next possible start, i.e. the
1122 * next position following a non-word char.
1124 bol = pmatch[0].rm_so + bol + 1;
1125 while (word_char(bol[-1]) && bol < eol)
1127 eflags |= REG_NOTBOL;
1132 if (p->token == GREP_PATTERN_HEAD && saved_ch)
1135 pmatch[0].rm_so += bol - start;
1136 pmatch[0].rm_eo += bol - start;
1141 static int match_expr_eval(struct grep_opt *opt, struct grep_expr *x, char *bol,
1142 char *eol, enum grep_context ctx, ssize_t *col,
1143 ssize_t *icol, int collect_hits)
1148 die("Not a valid grep expression");
1150 case GREP_NODE_TRUE:
1153 case GREP_NODE_ATOM:
1156 h = match_one_pattern(x->u.atom, bol, eol, ctx,
1158 if (h && (*col < 0 || tmp.rm_so < *col))
1164 * Upon visiting a GREP_NODE_NOT, col and icol become swapped.
1166 h = !match_expr_eval(opt, x->u.unary, bol, eol, ctx, icol, col,
1170 h = match_expr_eval(opt, x->u.binary.left, bol, eol, ctx, col,
1172 if (h || opt->columnnum) {
1174 * Don't short-circuit AND when given --column, since a
1175 * NOT earlier in the tree may turn this into an OR. In
1176 * this case, see the below comment.
1178 h &= match_expr_eval(opt, x->u.binary.right, bol, eol,
1183 if (!(collect_hits || opt->columnnum)) {
1185 * Don't short-circuit OR when given --column (or
1186 * collecting hits) to ensure we don't skip a later
1187 * child that would produce an earlier match.
1189 return (match_expr_eval(opt, x->u.binary.left, bol, eol,
1190 ctx, col, icol, 0) ||
1191 match_expr_eval(opt, x->u.binary.right, bol,
1192 eol, ctx, col, icol, 0));
1194 h = match_expr_eval(opt, x->u.binary.left, bol, eol, ctx, col,
1197 x->u.binary.left->hit |= h;
1198 h |= match_expr_eval(opt, x->u.binary.right, bol, eol, ctx, col,
1199 icol, collect_hits);
1202 die("Unexpected node type (internal error) %d", x->node);
1209 static int match_expr(struct grep_opt *opt, char *bol, char *eol,
1210 enum grep_context ctx, ssize_t *col,
1211 ssize_t *icol, int collect_hits)
1213 struct grep_expr *x = opt->pattern_expression;
1214 return match_expr_eval(opt, x, bol, eol, ctx, col, icol, collect_hits);
1217 static int match_line(struct grep_opt *opt, char *bol, char *eol,
1218 ssize_t *col, ssize_t *icol,
1219 enum grep_context ctx, int collect_hits)
1225 return match_expr(opt, bol, eol, ctx, col, icol,
1228 /* we do not call with collect_hits without being extended */
1229 for (p = opt->pattern_list; p; p = p->next) {
1231 if (match_one_pattern(p, bol, eol, ctx, &tmp, 0)) {
1233 if (!opt->columnnum) {
1235 * Without --column, any single match on a line
1236 * is enough to know that it needs to be
1237 * printed. With --column, scan _all_ patterns
1238 * to find the earliest.
1242 if (*col < 0 || tmp.rm_so < *col)
1249 static int match_next_pattern(struct grep_pat *p, char *bol, char *eol,
1250 enum grep_context ctx,
1251 regmatch_t *pmatch, int eflags)
1255 if (!match_one_pattern(p, bol, eol, ctx, &match, eflags))
1257 if (match.rm_so < 0 || match.rm_eo < 0)
1259 if (pmatch->rm_so >= 0 && pmatch->rm_eo >= 0) {
1260 if (match.rm_so > pmatch->rm_so)
1262 if (match.rm_so == pmatch->rm_so && match.rm_eo < pmatch->rm_eo)
1265 pmatch->rm_so = match.rm_so;
1266 pmatch->rm_eo = match.rm_eo;
1270 static int next_match(struct grep_opt *opt, char *bol, char *eol,
1271 enum grep_context ctx, regmatch_t *pmatch, int eflags)
1276 pmatch->rm_so = pmatch->rm_eo = -1;
1278 for (p = opt->pattern_list; p; p = p->next) {
1280 case GREP_PATTERN: /* atom */
1281 case GREP_PATTERN_HEAD:
1282 case GREP_PATTERN_BODY:
1283 hit |= match_next_pattern(p, bol, eol, ctx,
1294 static void show_line_header(struct grep_opt *opt, const char *name,
1295 unsigned lno, ssize_t cno, char sign)
1297 if (opt->heading && opt->last_shown == 0) {
1298 output_color(opt, name, strlen(name), opt->colors[GREP_COLOR_FILENAME]);
1299 opt->output(opt, "\n", 1);
1301 opt->last_shown = lno;
1303 if (!opt->heading && opt->pathname) {
1304 output_color(opt, name, strlen(name), opt->colors[GREP_COLOR_FILENAME]);
1305 output_sep(opt, sign);
1309 xsnprintf(buf, sizeof(buf), "%d", lno);
1310 output_color(opt, buf, strlen(buf), opt->colors[GREP_COLOR_LINENO]);
1311 output_sep(opt, sign);
1314 * Treat 'cno' as the 1-indexed offset from the start of a non-context
1315 * line to its first match. Otherwise, 'cno' is 0 indicating that we are
1316 * being called with a context line.
1318 if (opt->columnnum && cno) {
1320 xsnprintf(buf, sizeof(buf), "%"PRIuMAX, (uintmax_t)cno);
1321 output_color(opt, buf, strlen(buf), opt->colors[GREP_COLOR_COLUMNNO]);
1322 output_sep(opt, sign);
1326 static void show_line(struct grep_opt *opt, char *bol, char *eol,
1327 const char *name, unsigned lno, ssize_t cno, char sign)
1329 int rest = eol - bol;
1330 const char *match_color = NULL;
1331 const char *line_color = NULL;
1333 if (opt->file_break && opt->last_shown == 0) {
1334 if (opt->show_hunk_mark)
1335 opt->output(opt, "\n", 1);
1336 } else if (opt->pre_context || opt->post_context || opt->funcbody) {
1337 if (opt->last_shown == 0) {
1338 if (opt->show_hunk_mark) {
1339 output_color(opt, "--", 2, opt->colors[GREP_COLOR_SEP]);
1340 opt->output(opt, "\n", 1);
1342 } else if (lno > opt->last_shown + 1) {
1343 output_color(opt, "--", 2, opt->colors[GREP_COLOR_SEP]);
1344 opt->output(opt, "\n", 1);
1347 if (!opt->only_matching) {
1349 * In case the line we're being called with contains more than
1350 * one match, leave printing each header to the loop below.
1352 show_line_header(opt, name, lno, cno, sign);
1354 if (opt->color || opt->only_matching) {
1356 enum grep_context ctx = GREP_CONTEXT_BODY;
1362 match_color = opt->colors[GREP_COLOR_MATCH_SELECTED];
1364 match_color = opt->colors[GREP_COLOR_MATCH_CONTEXT];
1366 line_color = opt->colors[GREP_COLOR_SELECTED];
1367 else if (sign == '-')
1368 line_color = opt->colors[GREP_COLOR_CONTEXT];
1369 else if (sign == '=')
1370 line_color = opt->colors[GREP_COLOR_FUNCTION];
1373 while (next_match(opt, bol, eol, ctx, &match, eflags)) {
1374 if (match.rm_so == match.rm_eo)
1377 if (opt->only_matching)
1378 show_line_header(opt, name, lno, cno, sign);
1380 output_color(opt, bol, match.rm_so, line_color);
1381 output_color(opt, bol + match.rm_so,
1382 match.rm_eo - match.rm_so, match_color);
1383 if (opt->only_matching)
1384 opt->output(opt, "\n", 1);
1387 rest -= match.rm_eo;
1388 eflags = REG_NOTBOL;
1392 if (!opt->only_matching) {
1393 output_color(opt, bol, rest, line_color);
1394 opt->output(opt, "\n", 1);
1401 * This lock protects access to the gitattributes machinery, which is
1404 pthread_mutex_t grep_attr_mutex;
1406 static inline void grep_attr_lock(void)
1409 pthread_mutex_lock(&grep_attr_mutex);
1412 static inline void grep_attr_unlock(void)
1415 pthread_mutex_unlock(&grep_attr_mutex);
1418 static int match_funcname(struct grep_opt *opt, struct grep_source *gs, char *bol, char *eol)
1420 xdemitconf_t *xecfg = opt->priv;
1421 if (xecfg && !xecfg->find_func) {
1422 grep_source_load_driver(gs, opt->repo->index);
1423 if (gs->driver->funcname.pattern) {
1424 const struct userdiff_funcname *pe = &gs->driver->funcname;
1425 xdiff_set_find_func(xecfg, pe->pattern, pe->cflags);
1427 xecfg = opt->priv = NULL;
1433 return xecfg->find_func(bol, eol - bol, buf, 1,
1434 xecfg->find_func_priv) >= 0;
1439 if (isalpha(*bol) || *bol == '_' || *bol == '$')
1444 static void show_funcname_line(struct grep_opt *opt, struct grep_source *gs,
1445 char *bol, unsigned lno)
1447 while (bol > gs->buf) {
1450 while (bol > gs->buf && bol[-1] != '\n')
1454 if (lno <= opt->last_shown)
1457 if (match_funcname(opt, gs, bol, eol)) {
1458 show_line(opt, bol, eol, gs->name, lno, 0, '=');
1464 static int is_empty_line(const char *bol, const char *eol);
1466 static void show_pre_context(struct grep_opt *opt, struct grep_source *gs,
1467 char *bol, char *end, unsigned lno)
1469 unsigned cur = lno, from = 1, funcname_lno = 0, orig_from;
1470 int funcname_needed = !!opt->funcname, comment_needed = 0;
1472 if (opt->pre_context < lno)
1473 from = lno - opt->pre_context;
1474 if (from <= opt->last_shown)
1475 from = opt->last_shown + 1;
1477 if (opt->funcbody) {
1478 if (match_funcname(opt, gs, bol, end))
1481 funcname_needed = 1;
1482 from = opt->last_shown + 1;
1486 while (bol > gs->buf && cur > from) {
1487 char *next_bol = bol;
1490 while (bol > gs->buf && bol[-1] != '\n')
1493 if (comment_needed && (is_empty_line(bol, eol) ||
1494 match_funcname(opt, gs, bol, eol))) {
1503 if (funcname_needed && match_funcname(opt, gs, bol, eol)) {
1505 funcname_needed = 0;
1513 /* We need to look even further back to find a function signature. */
1514 if (opt->funcname && funcname_needed)
1515 show_funcname_line(opt, gs, bol, cur);
1519 char *eol = bol, sign = (cur == funcname_lno) ? '=' : '-';
1521 while (*eol != '\n')
1523 show_line(opt, bol, eol, gs->name, cur, 0, sign);
1529 static int should_lookahead(struct grep_opt *opt)
1534 return 0; /* punt for too complex stuff */
1537 for (p = opt->pattern_list; p; p = p->next) {
1538 if (p->token != GREP_PATTERN)
1539 return 0; /* punt for "header only" and stuff */
1544 static int look_ahead(struct grep_opt *opt,
1545 unsigned long *left_p,
1549 unsigned lno = *lno_p;
1552 char *sp, *last_bol;
1553 regoff_t earliest = -1;
1555 for (p = opt->pattern_list; p; p = p->next) {
1559 hit = patmatch(p, bol, bol + *left_p, &m, 0);
1560 if (!hit || m.rm_so < 0 || m.rm_eo < 0)
1562 if (earliest < 0 || m.rm_so < earliest)
1567 *bol_p = bol + *left_p;
1571 for (sp = bol + earliest; bol < sp && sp[-1] != '\n'; sp--)
1572 ; /* find the beginning of the line */
1575 for (sp = bol; sp < last_bol; sp++) {
1579 *left_p -= last_bol - bol;
1585 static int fill_textconv_grep(struct repository *r,
1586 struct userdiff_driver *driver,
1587 struct grep_source *gs)
1589 struct diff_filespec *df;
1593 if (!driver || !driver->textconv)
1594 return grep_source_load(gs);
1597 * The textconv interface is intimately tied to diff_filespecs, so we
1598 * have to pretend to be one. If we could unify the grep_source
1599 * and diff_filespec structs, this mess could just go away.
1601 df = alloc_filespec(gs->path);
1603 case GREP_SOURCE_OID:
1604 fill_filespec(df, gs->identifier, 1, 0100644);
1606 case GREP_SOURCE_FILE:
1607 fill_filespec(df, &null_oid, 0, 0100644);
1610 BUG("attempt to textconv something without a path?");
1614 * fill_textconv is not remotely thread-safe; it modifies the global
1615 * diff tempfile structure, writes to the_repo's odb and might
1616 * internally call thread-unsafe functions such as the
1617 * prepare_packed_git() lazy-initializator. Because of the last two, we
1618 * must ensure mutual exclusion between this call and the object reading
1619 * API, thus we use obj_read_lock() here.
1621 * TODO: allowing text conversion to run in parallel with object
1622 * reading operations might increase performance in the multithreaded
1623 * non-worktreee git-grep with --textconv.
1626 size = fill_textconv(r, driver, df, &buf);
1631 * The normal fill_textconv usage by the diff machinery would just keep
1632 * the textconv'd buf separate from the diff_filespec. But much of the
1633 * grep code passes around a grep_source and assumes that its "buf"
1634 * pointer is the beginning of the thing we are searching. So let's
1635 * install our textconv'd version into the grep_source, taking care not
1636 * to leak any existing buffer.
1638 grep_source_clear_data(gs);
1645 static int is_empty_line(const char *bol, const char *eol)
1647 while (bol < eol && isspace(*bol))
1652 static int grep_source_1(struct grep_opt *opt, struct grep_source *gs, int collect_hits)
1655 char *peek_bol = NULL;
1658 unsigned last_hit = 0;
1659 int binary_match_only = 0;
1661 int try_lookahead = 0;
1662 int show_function = 0;
1663 struct userdiff_driver *textconv = NULL;
1664 enum grep_context ctx = GREP_CONTEXT_HEAD;
1667 if (!opt->status_only && gs->name == NULL)
1668 BUG("grep call which could print a name requires "
1669 "grep_source.name be non-NULL");
1672 opt->output = std_output;
1674 if (opt->pre_context || opt->post_context || opt->file_break ||
1676 /* Show hunk marks, except for the first file. */
1677 if (opt->last_shown)
1678 opt->show_hunk_mark = 1;
1680 * If we're using threads then we can't easily identify
1681 * the first file. Always put hunk marks in that case
1682 * and skip the very first one later in work_done().
1684 if (opt->output != std_output)
1685 opt->show_hunk_mark = 1;
1687 opt->last_shown = 0;
1689 if (opt->allow_textconv) {
1690 grep_source_load_driver(gs, opt->repo->index);
1692 * We might set up the shared textconv cache data here, which
1693 * is not thread-safe. Also, get_oid_with_context() and
1694 * parse_object() might be internally called. As they are not
1695 * currently thread-safe and might be racy with object reading,
1696 * obj_read_lock() must be called.
1700 textconv = userdiff_get_textconv(opt->repo, gs->driver);
1706 * We know the result of a textconv is text, so we only have to care
1707 * about binary handling if we are not using it.
1710 switch (opt->binary) {
1711 case GREP_BINARY_DEFAULT:
1712 if (grep_source_is_binary(gs, opt->repo->index))
1713 binary_match_only = 1;
1715 case GREP_BINARY_NOMATCH:
1716 if (grep_source_is_binary(gs, opt->repo->index))
1717 return 0; /* Assume unmatch */
1719 case GREP_BINARY_TEXT:
1722 BUG("unknown binary handling mode");
1726 memset(&xecfg, 0, sizeof(xecfg));
1729 try_lookahead = should_lookahead(opt);
1731 if (fill_textconv_grep(opt->repo, textconv, gs) < 0)
1740 ssize_t col = -1, icol = -1;
1743 * look_ahead() skips quickly to the line that possibly
1744 * has the next hit; don't call it if we need to do
1745 * something more than just skipping the current line
1746 * in response to an unmatch for the current line. E.g.
1747 * inside a post-context window, we will show the current
1748 * line as a context around the previous hit when it
1753 && (show_function ||
1754 lno <= last_hit + opt->post_context))
1755 && look_ahead(opt, &left, &lno, &bol))
1757 eol = end_of_line(bol, &left);
1761 if ((ctx == GREP_CONTEXT_HEAD) && (eol == bol))
1762 ctx = GREP_CONTEXT_BODY;
1764 hit = match_line(opt, bol, eol, &col, &icol, ctx, collect_hits);
1770 /* "grep -v -e foo -e bla" should list lines
1771 * that do not have either, so inversion should
1776 if (opt->unmatch_name_only) {
1783 if (opt->status_only)
1785 if (opt->name_only) {
1786 show_name(opt, gs->name);
1791 if (binary_match_only) {
1792 opt->output(opt, "Binary file ", 12);
1793 output_color(opt, gs->name, strlen(gs->name),
1794 opt->colors[GREP_COLOR_FILENAME]);
1795 opt->output(opt, " matches\n", 9);
1798 /* Hit at this line. If we haven't shown the
1799 * pre-context lines, we would need to show them.
1801 if (opt->pre_context || opt->funcbody)
1802 show_pre_context(opt, gs, bol, eol, lno);
1803 else if (opt->funcname)
1804 show_funcname_line(opt, gs, bol, lno);
1805 cno = opt->invert ? icol : col;
1808 * A negative cno indicates that there was no
1809 * match on the line. We are thus inverted and
1810 * being asked to show all lines that _don't_
1811 * match a given expression. Therefore, set cno
1812 * to 0 to suggest the whole line matches.
1816 show_line(opt, bol, eol, gs->name, lno, cno + 1, ':');
1822 if (show_function && (!peek_bol || peek_bol < bol)) {
1823 unsigned long peek_left = left;
1824 char *peek_eol = eol;
1827 * Trailing empty lines are not interesting.
1828 * Peek past them to see if they belong to the
1829 * body of the current function.
1832 while (is_empty_line(peek_bol, peek_eol)) {
1833 peek_bol = peek_eol + 1;
1834 peek_eol = end_of_line(peek_bol, &peek_left);
1837 if (match_funcname(opt, gs, peek_bol, peek_eol))
1840 if (show_function ||
1841 (last_hit && lno <= last_hit + opt->post_context)) {
1842 /* If the last hit is within the post context,
1843 * we need to show this line.
1845 show_line(opt, bol, eol, gs->name, lno, col + 1, '-');
1859 if (opt->status_only)
1860 return opt->unmatch_name_only;
1861 if (opt->unmatch_name_only) {
1862 /* We did not see any hit, so we want to show this */
1863 show_name(opt, gs->name);
1867 xdiff_clear_find_func(&xecfg);
1871 * The real "grep -c foo *.c" gives many "bar.c:0" lines,
1872 * which feels mostly useless but sometimes useful. Maybe
1873 * make it another option? For now suppress them.
1875 if (opt->count && count) {
1877 if (opt->pathname) {
1878 output_color(opt, gs->name, strlen(gs->name),
1879 opt->colors[GREP_COLOR_FILENAME]);
1880 output_sep(opt, ':');
1882 xsnprintf(buf, sizeof(buf), "%u\n", count);
1883 opt->output(opt, buf, strlen(buf));
1889 static void clr_hit_marker(struct grep_expr *x)
1891 /* All-hit markers are meaningful only at the very top level
1896 if (x->node != GREP_NODE_OR)
1898 x->u.binary.left->hit = 0;
1899 x = x->u.binary.right;
1903 static int chk_hit_marker(struct grep_expr *x)
1905 /* Top level nodes have hit markers. See if they all are hits */
1907 if (x->node != GREP_NODE_OR)
1909 if (!x->u.binary.left->hit)
1911 x = x->u.binary.right;
1915 int grep_source(struct grep_opt *opt, struct grep_source *gs)
1918 * we do not have to do the two-pass grep when we do not check
1919 * buffer-wide "all-match".
1921 if (!opt->all_match)
1922 return grep_source_1(opt, gs, 0);
1924 /* Otherwise the toplevel "or" terms hit a bit differently.
1925 * We first clear hit markers from them.
1927 clr_hit_marker(opt->pattern_expression);
1928 grep_source_1(opt, gs, 1);
1930 if (!chk_hit_marker(opt->pattern_expression))
1933 return grep_source_1(opt, gs, 0);
1936 int grep_buffer(struct grep_opt *opt, char *buf, unsigned long size)
1938 struct grep_source gs;
1941 grep_source_init(&gs, GREP_SOURCE_BUF, NULL, NULL, NULL);
1945 r = grep_source(opt, &gs);
1947 grep_source_clear(&gs);
1951 void grep_source_init(struct grep_source *gs, enum grep_source_type type,
1952 const char *name, const char *path,
1953 const void *identifier)
1956 gs->name = xstrdup_or_null(name);
1957 gs->path = xstrdup_or_null(path);
1963 case GREP_SOURCE_FILE:
1964 gs->identifier = xstrdup(identifier);
1966 case GREP_SOURCE_OID:
1967 gs->identifier = oiddup(identifier);
1969 case GREP_SOURCE_BUF:
1970 gs->identifier = NULL;
1975 void grep_source_clear(struct grep_source *gs)
1977 FREE_AND_NULL(gs->name);
1978 FREE_AND_NULL(gs->path);
1979 FREE_AND_NULL(gs->identifier);
1980 grep_source_clear_data(gs);
1983 void grep_source_clear_data(struct grep_source *gs)
1986 case GREP_SOURCE_FILE:
1987 case GREP_SOURCE_OID:
1988 FREE_AND_NULL(gs->buf);
1991 case GREP_SOURCE_BUF:
1992 /* leave user-provided buf intact */
1997 static int grep_source_load_oid(struct grep_source *gs)
1999 enum object_type type;
2001 gs->buf = read_object_file(gs->identifier, &type, &gs->size);
2003 return error(_("'%s': unable to read %s"),
2005 oid_to_hex(gs->identifier));
2009 static int grep_source_load_file(struct grep_source *gs)
2011 const char *filename = gs->identifier;
2017 if (lstat(filename, &st) < 0) {
2019 if (errno != ENOENT)
2020 error_errno(_("failed to stat '%s'"), filename);
2023 if (!S_ISREG(st.st_mode))
2025 size = xsize_t(st.st_size);
2026 i = open(filename, O_RDONLY);
2029 data = xmallocz(size);
2030 if (st.st_size != read_in_full(i, data, size)) {
2031 error_errno(_("'%s': short read"), filename);
2043 static int grep_source_load(struct grep_source *gs)
2049 case GREP_SOURCE_FILE:
2050 return grep_source_load_file(gs);
2051 case GREP_SOURCE_OID:
2052 return grep_source_load_oid(gs);
2053 case GREP_SOURCE_BUF:
2054 return gs->buf ? 0 : -1;
2056 BUG("invalid grep_source type to load");
2059 void grep_source_load_driver(struct grep_source *gs,
2060 struct index_state *istate)
2067 gs->driver = userdiff_find_by_path(istate, gs->path);
2069 gs->driver = userdiff_find_by_name("default");
2073 static int grep_source_is_binary(struct grep_source *gs,
2074 struct index_state *istate)
2076 grep_source_load_driver(gs, istate);
2077 if (gs->driver->binary != -1)
2078 return gs->driver->binary;
2080 if (!grep_source_load(gs))
2081 return buffer_is_binary(gs->buf, gs->size);