5 #include "xdiff-interface.h"
11 static int grep_source_load(struct grep_source *gs);
12 static int grep_source_is_binary(struct grep_source *gs);
14 static struct grep_opt grep_defaults;
16 static void std_output(struct grep_opt *opt, const void *buf, size_t size)
18 fwrite(buf, size, 1, stdout);
22 * Initialize the grep_defaults template with hardcoded defaults.
23 * We could let the compiler do this, but without C99 initializers
24 * the code gets unwieldy and unreadable, so...
26 void init_grep_defaults(void)
28 struct grep_opt *opt = &grep_defaults;
35 memset(opt, 0, sizeof(*opt));
39 opt->pattern_type_option = GREP_PATTERN_TYPE_UNSPECIFIED;
40 color_set(opt->color_context, "");
41 color_set(opt->color_filename, "");
42 color_set(opt->color_function, "");
43 color_set(opt->color_lineno, "");
44 color_set(opt->color_match_context, GIT_COLOR_BOLD_RED);
45 color_set(opt->color_match_selected, GIT_COLOR_BOLD_RED);
46 color_set(opt->color_selected, "");
47 color_set(opt->color_sep, GIT_COLOR_CYAN);
49 opt->output = std_output;
52 static int parse_pattern_type_arg(const char *opt, const char *arg)
54 if (!strcmp(arg, "default"))
55 return GREP_PATTERN_TYPE_UNSPECIFIED;
56 else if (!strcmp(arg, "basic"))
57 return GREP_PATTERN_TYPE_BRE;
58 else if (!strcmp(arg, "extended"))
59 return GREP_PATTERN_TYPE_ERE;
60 else if (!strcmp(arg, "fixed"))
61 return GREP_PATTERN_TYPE_FIXED;
62 else if (!strcmp(arg, "perl"))
63 return GREP_PATTERN_TYPE_PCRE;
64 die("bad %s argument: %s", opt, arg);
68 * Read the configuration file once and store it in
69 * the grep_defaults template.
71 int grep_config(const char *var, const char *value, void *cb)
73 struct grep_opt *opt = &grep_defaults;
76 if (userdiff_config(var, value) < 0)
79 if (!strcmp(var, "grep.extendedregexp")) {
80 opt->extended_regexp_option = git_config_bool(var, value);
84 if (!strcmp(var, "grep.patterntype")) {
85 opt->pattern_type_option = parse_pattern_type_arg(var, value);
89 if (!strcmp(var, "grep.linenumber")) {
90 opt->linenum = git_config_bool(var, value);
94 if (!strcmp(var, "grep.fullname")) {
95 opt->relative = !git_config_bool(var, value);
99 if (!strcmp(var, "color.grep"))
100 opt->color = git_config_colorbool(var, value);
101 else if (!strcmp(var, "color.grep.context"))
102 color = opt->color_context;
103 else if (!strcmp(var, "color.grep.filename"))
104 color = opt->color_filename;
105 else if (!strcmp(var, "color.grep.function"))
106 color = opt->color_function;
107 else if (!strcmp(var, "color.grep.linenumber"))
108 color = opt->color_lineno;
109 else if (!strcmp(var, "color.grep.matchcontext"))
110 color = opt->color_match_context;
111 else if (!strcmp(var, "color.grep.matchselected"))
112 color = opt->color_match_selected;
113 else if (!strcmp(var, "color.grep.selected"))
114 color = opt->color_selected;
115 else if (!strcmp(var, "color.grep.separator"))
116 color = opt->color_sep;
117 else if (!strcmp(var, "color.grep.match")) {
120 return config_error_nonbool(var);
121 rc |= color_parse(value, opt->color_match_context);
122 rc |= color_parse(value, opt->color_match_selected);
128 return config_error_nonbool(var);
129 return color_parse(value, color);
135 * Initialize one instance of grep_opt and copy the
136 * default values from the template we read the configuration
137 * information in an earlier call to git_config(grep_config).
139 void grep_init(struct grep_opt *opt, const char *prefix)
141 struct grep_opt *def = &grep_defaults;
143 memset(opt, 0, sizeof(*opt));
144 opt->prefix = prefix;
145 opt->prefix_length = (prefix && *prefix) ? strlen(prefix) : 0;
146 opt->pattern_tail = &opt->pattern_list;
147 opt->header_tail = &opt->header_list;
149 opt->color = def->color;
150 opt->extended_regexp_option = def->extended_regexp_option;
151 opt->pattern_type_option = def->pattern_type_option;
152 opt->linenum = def->linenum;
153 opt->max_depth = def->max_depth;
154 opt->pathname = def->pathname;
155 opt->relative = def->relative;
156 opt->output = def->output;
158 color_set(opt->color_context, def->color_context);
159 color_set(opt->color_filename, def->color_filename);
160 color_set(opt->color_function, def->color_function);
161 color_set(opt->color_lineno, def->color_lineno);
162 color_set(opt->color_match_context, def->color_match_context);
163 color_set(opt->color_match_selected, def->color_match_selected);
164 color_set(opt->color_selected, def->color_selected);
165 color_set(opt->color_sep, def->color_sep);
168 static void grep_set_pattern_type_option(enum grep_pattern_type pattern_type, struct grep_opt *opt)
171 * When committing to the pattern type by setting the relevant
172 * fields in grep_opt it's generally not necessary to zero out
173 * the fields we're not choosing, since they won't have been
174 * set by anything. The extended_regexp_option field is the
175 * only exception to this.
177 * This is because in the process of parsing grep.patternType
178 * & grep.extendedRegexp we set opt->pattern_type_option and
179 * opt->extended_regexp_option, respectively. We then
180 * internally use opt->extended_regexp_option to see if we're
181 * compiling an ERE. It must be unset if that's not actually
184 if (pattern_type != GREP_PATTERN_TYPE_ERE &&
185 opt->extended_regexp_option)
186 opt->extended_regexp_option = 0;
188 switch (pattern_type) {
189 case GREP_PATTERN_TYPE_UNSPECIFIED:
192 case GREP_PATTERN_TYPE_BRE:
195 case GREP_PATTERN_TYPE_ERE:
196 opt->extended_regexp_option = 1;
199 case GREP_PATTERN_TYPE_FIXED:
203 case GREP_PATTERN_TYPE_PCRE:
208 * It's important that pcre1 always be assigned to
209 * even when there's no USE_LIBPCRE* defined. We still
210 * call the PCRE stub function, it just dies with
211 * "cannot use Perl-compatible regexes[...]".
219 void grep_commit_pattern_type(enum grep_pattern_type pattern_type, struct grep_opt *opt)
221 if (pattern_type != GREP_PATTERN_TYPE_UNSPECIFIED)
222 grep_set_pattern_type_option(pattern_type, opt);
223 else if (opt->pattern_type_option != GREP_PATTERN_TYPE_UNSPECIFIED)
224 grep_set_pattern_type_option(opt->pattern_type_option, opt);
225 else if (opt->extended_regexp_option)
227 * This branch *must* happen after setting from the
228 * opt->pattern_type_option above, we don't want
229 * grep.extendedRegexp to override grep.patternType!
231 grep_set_pattern_type_option(GREP_PATTERN_TYPE_ERE, opt);
234 static struct grep_pat *create_grep_pat(const char *pat, size_t patlen,
235 const char *origin, int no,
236 enum grep_pat_token t,
237 enum grep_header_field field)
239 struct grep_pat *p = xcalloc(1, sizeof(*p));
240 p->pattern = xmemdupz(pat, patlen);
241 p->patternlen = patlen;
249 static void do_append_grep_pat(struct grep_pat ***tail, struct grep_pat *p)
256 case GREP_PATTERN: /* atom */
257 case GREP_PATTERN_HEAD:
258 case GREP_PATTERN_BODY:
260 struct grep_pat *new_pat;
262 char *cp = p->pattern + p->patternlen, *nl = NULL;
263 while (++len <= p->patternlen) {
264 if (*(--cp) == '\n') {
271 new_pat = create_grep_pat(nl + 1, len - 1, p->origin,
272 p->no, p->token, p->field);
273 new_pat->next = p->next;
275 *tail = &new_pat->next;
278 p->patternlen -= len;
286 void append_header_grep_pattern(struct grep_opt *opt,
287 enum grep_header_field field, const char *pat)
289 struct grep_pat *p = create_grep_pat(pat, strlen(pat), "header", 0,
290 GREP_PATTERN_HEAD, field);
291 if (field == GREP_HEADER_REFLOG)
292 opt->use_reflog_filter = 1;
293 do_append_grep_pat(&opt->header_tail, p);
296 void append_grep_pattern(struct grep_opt *opt, const char *pat,
297 const char *origin, int no, enum grep_pat_token t)
299 append_grep_pat(opt, pat, strlen(pat), origin, no, t);
302 void append_grep_pat(struct grep_opt *opt, const char *pat, size_t patlen,
303 const char *origin, int no, enum grep_pat_token t)
305 struct grep_pat *p = create_grep_pat(pat, patlen, origin, no, t, 0);
306 do_append_grep_pat(&opt->pattern_tail, p);
309 struct grep_opt *grep_opt_dup(const struct grep_opt *opt)
311 struct grep_pat *pat;
312 struct grep_opt *ret = xmalloc(sizeof(struct grep_opt));
315 ret->pattern_list = NULL;
316 ret->pattern_tail = &ret->pattern_list;
318 for(pat = opt->pattern_list; pat != NULL; pat = pat->next)
320 if(pat->token == GREP_PATTERN_HEAD)
321 append_header_grep_pattern(ret, pat->field,
324 append_grep_pat(ret, pat->pattern, pat->patternlen,
325 pat->origin, pat->no, pat->token);
331 static NORETURN void compile_regexp_failed(const struct grep_pat *p,
337 xsnprintf(where, sizeof(where), "In '%s' at %d, ", p->origin, p->no);
339 xsnprintf(where, sizeof(where), "%s, ", p->origin);
343 die("%s'%s': %s", where, p->pattern, error);
346 static int is_fixed(const char *s, size_t len)
350 for (i = 0; i < len; i++) {
351 if (is_regex_special(s[i]))
358 static int has_null(const char *s, size_t len)
361 * regcomp cannot accept patterns with NULs so when using it
362 * we consider any pattern containing a NUL fixed.
364 if (memchr(s, 0, len))
371 static void compile_pcre1_regexp(struct grep_pat *p, const struct grep_opt *opt)
375 int options = PCRE_MULTILINE;
377 if (opt->ignore_case) {
378 if (has_non_ascii(p->pattern))
379 p->pcre1_tables = pcre_maketables();
380 options |= PCRE_CASELESS;
382 if (is_utf8_locale() && has_non_ascii(p->pattern))
383 options |= PCRE_UTF8;
385 p->pcre1_regexp = pcre_compile(p->pattern, options, &error, &erroffset,
387 if (!p->pcre1_regexp)
388 compile_regexp_failed(p, error);
390 p->pcre1_extra_info = pcre_study(p->pcre1_regexp, PCRE_STUDY_JIT_COMPILE, &error);
391 if (!p->pcre1_extra_info && error)
394 #ifdef GIT_PCRE1_USE_JIT
395 pcre_config(PCRE_CONFIG_JIT, &p->pcre1_jit_on);
396 if (p->pcre1_jit_on == 1) {
397 p->pcre1_jit_stack = pcre_jit_stack_alloc(1, 1024 * 1024);
398 if (!p->pcre1_jit_stack)
399 die("Couldn't allocate PCRE JIT stack");
400 pcre_assign_jit_stack(p->pcre1_extra_info, NULL, p->pcre1_jit_stack);
401 } else if (p->pcre1_jit_on != 0) {
402 die("BUG: The pcre1_jit_on variable should be 0 or 1, not %d",
408 static int pcre1match(struct grep_pat *p, const char *line, const char *eol,
409 regmatch_t *match, int eflags)
411 int ovector[30], ret, flags = 0;
413 if (eflags & REG_NOTBOL)
414 flags |= PCRE_NOTBOL;
416 #ifdef GIT_PCRE1_USE_JIT
417 if (p->pcre1_jit_on) {
418 ret = pcre_jit_exec(p->pcre1_regexp, p->pcre1_extra_info, line,
419 eol - line, 0, flags, ovector,
420 ARRAY_SIZE(ovector), p->pcre1_jit_stack);
424 ret = pcre_exec(p->pcre1_regexp, p->pcre1_extra_info, line,
425 eol - line, 0, flags, ovector,
426 ARRAY_SIZE(ovector));
429 if (ret < 0 && ret != PCRE_ERROR_NOMATCH)
430 die("pcre_exec failed with error code %d", ret);
433 match->rm_so = ovector[0];
434 match->rm_eo = ovector[1];
440 static void free_pcre1_regexp(struct grep_pat *p)
442 pcre_free(p->pcre1_regexp);
443 #ifdef GIT_PCRE1_USE_JIT
444 if (p->pcre1_jit_on) {
445 pcre_free_study(p->pcre1_extra_info);
446 pcre_jit_stack_free(p->pcre1_jit_stack);
450 pcre_free(p->pcre1_extra_info);
452 pcre_free((void *)p->pcre1_tables);
454 #else /* !USE_LIBPCRE1 */
455 static void compile_pcre1_regexp(struct grep_pat *p, const struct grep_opt *opt)
457 die("cannot use Perl-compatible regexes when not compiled with USE_LIBPCRE");
460 static int pcre1match(struct grep_pat *p, const char *line, const char *eol,
461 regmatch_t *match, int eflags)
466 static void free_pcre1_regexp(struct grep_pat *p)
469 #endif /* !USE_LIBPCRE1 */
472 static void compile_pcre2_pattern(struct grep_pat *p, const struct grep_opt *opt)
475 PCRE2_UCHAR errbuf[256];
476 PCRE2_SIZE erroffset;
477 int options = PCRE2_MULTILINE;
478 const uint8_t *character_tables = NULL;
483 p->pcre2_compile_context = NULL;
485 if (opt->ignore_case) {
486 if (has_non_ascii(p->pattern)) {
487 character_tables = pcre2_maketables(NULL);
488 p->pcre2_compile_context = pcre2_compile_context_create(NULL);
489 pcre2_set_character_tables(p->pcre2_compile_context, character_tables);
491 options |= PCRE2_CASELESS;
493 if (is_utf8_locale() && has_non_ascii(p->pattern))
494 options |= PCRE2_UTF;
496 p->pcre2_pattern = pcre2_compile((PCRE2_SPTR)p->pattern,
497 p->patternlen, options, &error, &erroffset,
498 p->pcre2_compile_context);
500 if (p->pcre2_pattern) {
501 p->pcre2_match_data = pcre2_match_data_create_from_pattern(p->pcre2_pattern, NULL);
502 if (!p->pcre2_match_data)
503 die("Couldn't allocate PCRE2 match data");
505 pcre2_get_error_message(error, errbuf, sizeof(errbuf));
506 compile_regexp_failed(p, (const char *)&errbuf);
509 pcre2_config(PCRE2_CONFIG_JIT, &p->pcre2_jit_on);
510 if (p->pcre2_jit_on == 1) {
511 jitret = pcre2_jit_compile(p->pcre2_pattern, PCRE2_JIT_COMPLETE);
513 die("Couldn't JIT the PCRE2 pattern '%s', got '%d'\n", p->pattern, jitret);
514 p->pcre2_jit_stack = pcre2_jit_stack_create(1, 1024 * 1024, NULL);
515 if (!p->pcre2_jit_stack)
516 die("Couldn't allocate PCRE2 JIT stack");
517 p->pcre2_match_context = pcre2_match_context_create(NULL);
518 if (!p->pcre2_match_context)
519 die("Couldn't allocate PCRE2 match context");
520 pcre2_jit_stack_assign(p->pcre2_match_context, NULL, p->pcre2_jit_stack);
521 } else if (p->pcre2_jit_on != 0) {
522 die("BUG: The pcre2_jit_on variable should be 0 or 1, not %d",
527 static int pcre2match(struct grep_pat *p, const char *line, const char *eol,
528 regmatch_t *match, int eflags)
532 PCRE2_UCHAR errbuf[256];
534 if (eflags & REG_NOTBOL)
535 flags |= PCRE2_NOTBOL;
538 ret = pcre2_jit_match(p->pcre2_pattern, (unsigned char *)line,
539 eol - line, 0, flags, p->pcre2_match_data,
542 ret = pcre2_match(p->pcre2_pattern, (unsigned char *)line,
543 eol - line, 0, flags, p->pcre2_match_data,
546 if (ret < 0 && ret != PCRE2_ERROR_NOMATCH) {
547 pcre2_get_error_message(ret, errbuf, sizeof(errbuf));
548 die("%s failed with error code %d: %s",
549 (p->pcre2_jit_on ? "pcre2_jit_match" : "pcre2_match"), ret,
553 ovector = pcre2_get_ovector_pointer(p->pcre2_match_data);
555 match->rm_so = (int)ovector[0];
556 match->rm_eo = (int)ovector[1];
562 static void free_pcre2_pattern(struct grep_pat *p)
564 pcre2_compile_context_free(p->pcre2_compile_context);
565 pcre2_code_free(p->pcre2_pattern);
566 pcre2_match_data_free(p->pcre2_match_data);
567 pcre2_jit_stack_free(p->pcre2_jit_stack);
568 pcre2_match_context_free(p->pcre2_match_context);
570 #else /* !USE_LIBPCRE2 */
571 static void compile_pcre2_pattern(struct grep_pat *p, const struct grep_opt *opt)
574 * Unreachable until USE_LIBPCRE2 becomes synonymous with
575 * USE_LIBPCRE. See the sibling comment in
576 * grep_set_pattern_type_option().
578 die("cannot use Perl-compatible regexes when not compiled with USE_LIBPCRE");
581 static int pcre2match(struct grep_pat *p, const char *line, const char *eol,
582 regmatch_t *match, int eflags)
587 static void free_pcre2_pattern(struct grep_pat *p)
590 #endif /* !USE_LIBPCRE2 */
592 static void compile_fixed_regexp(struct grep_pat *p, struct grep_opt *opt)
594 struct strbuf sb = STRBUF_INIT;
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);
603 fprintf(stderr, "fixed %s\n", sb.buf);
607 regerror(err, &p->regexp, errbuf, sizeof(errbuf));
609 compile_regexp_failed(p, errbuf);
613 static void compile_regexp(struct grep_pat *p, struct grep_opt *opt)
617 int regflags = REG_NEWLINE;
619 p->word_regexp = opt->word_regexp;
620 p->ignore_case = opt->ignore_case;
621 ascii_only = !has_non_ascii(p->pattern);
624 * Even when -F (fixed) asks us to do a non-regexp search, we
625 * may not be able to correctly case-fold when -i
626 * (ignore-case) is asked (in which case, we'll synthesize a
627 * regexp to match the pattern that matches regexp special
628 * characters literally, while ignoring case differences). On
629 * the other hand, even without -F, if the pattern does not
630 * have any regexp special characters and there is no need for
631 * case-folding search, we can internally turn it into a
632 * simple string match using kws. p->fixed tells us if we
636 has_null(p->pattern, p->patternlen) ||
637 is_fixed(p->pattern, p->patternlen))
638 p->fixed = !p->ignore_case || ascii_only;
641 p->kws = kwsalloc(p->ignore_case ? tolower_trans_tbl : NULL);
642 kwsincr(p->kws, p->pattern, p->patternlen);
645 } else if (opt->fixed) {
647 * We come here when the pattern has the non-ascii
648 * characters we cannot case-fold, and asked to
651 compile_fixed_regexp(p, opt);
656 compile_pcre2_pattern(p, opt);
661 compile_pcre1_regexp(p, opt);
666 regflags |= REG_ICASE;
667 if (opt->extended_regexp_option)
668 regflags |= REG_EXTENDED;
669 err = regcomp(&p->regexp, p->pattern, regflags);
672 regerror(err, &p->regexp, errbuf, 1024);
674 compile_regexp_failed(p, errbuf);
678 static struct grep_expr *compile_pattern_or(struct grep_pat **);
679 static struct grep_expr *compile_pattern_atom(struct grep_pat **list)
688 case GREP_PATTERN: /* atom */
689 case GREP_PATTERN_HEAD:
690 case GREP_PATTERN_BODY:
691 x = xcalloc(1, sizeof (struct grep_expr));
692 x->node = GREP_NODE_ATOM;
696 case GREP_OPEN_PAREN:
698 x = compile_pattern_or(list);
699 if (!*list || (*list)->token != GREP_CLOSE_PAREN)
700 die("unmatched parenthesis");
701 *list = (*list)->next;
708 static struct grep_expr *compile_pattern_not(struct grep_pat **list)
719 die("--not not followed by pattern expression");
721 x = xcalloc(1, sizeof (struct grep_expr));
722 x->node = GREP_NODE_NOT;
723 x->u.unary = compile_pattern_not(list);
725 die("--not followed by non pattern expression");
728 return compile_pattern_atom(list);
732 static struct grep_expr *compile_pattern_and(struct grep_pat **list)
735 struct grep_expr *x, *y, *z;
737 x = compile_pattern_not(list);
739 if (p && p->token == GREP_AND) {
741 die("--and not followed by pattern expression");
743 y = compile_pattern_and(list);
745 die("--and not followed by pattern expression");
746 z = xcalloc(1, sizeof (struct grep_expr));
747 z->node = GREP_NODE_AND;
748 z->u.binary.left = x;
749 z->u.binary.right = y;
755 static struct grep_expr *compile_pattern_or(struct grep_pat **list)
758 struct grep_expr *x, *y, *z;
760 x = compile_pattern_and(list);
762 if (x && p && p->token != GREP_CLOSE_PAREN) {
763 y = compile_pattern_or(list);
765 die("not a pattern expression %s", p->pattern);
766 z = xcalloc(1, sizeof (struct grep_expr));
767 z->node = GREP_NODE_OR;
768 z->u.binary.left = x;
769 z->u.binary.right = y;
775 static struct grep_expr *compile_pattern_expr(struct grep_pat **list)
777 return compile_pattern_or(list);
780 static void indent(int in)
786 static void dump_grep_pat(struct grep_pat *p)
789 case GREP_AND: fprintf(stderr, "*and*"); break;
790 case GREP_OPEN_PAREN: fprintf(stderr, "*(*"); break;
791 case GREP_CLOSE_PAREN: fprintf(stderr, "*)*"); break;
792 case GREP_NOT: fprintf(stderr, "*not*"); break;
793 case GREP_OR: fprintf(stderr, "*or*"); break;
795 case GREP_PATTERN: fprintf(stderr, "pattern"); break;
796 case GREP_PATTERN_HEAD: fprintf(stderr, "pattern_head"); break;
797 case GREP_PATTERN_BODY: fprintf(stderr, "pattern_body"); break;
802 case GREP_PATTERN_HEAD:
803 fprintf(stderr, "<head %d>", p->field); break;
804 case GREP_PATTERN_BODY:
805 fprintf(stderr, "<body>"); break;
809 case GREP_PATTERN_HEAD:
810 case GREP_PATTERN_BODY:
812 fprintf(stderr, "%.*s", (int)p->patternlen, p->pattern);
818 static void dump_grep_expression_1(struct grep_expr *x, int in)
823 fprintf(stderr, "true\n");
826 dump_grep_pat(x->u.atom);
829 fprintf(stderr, "(not\n");
830 dump_grep_expression_1(x->u.unary, in+1);
832 fprintf(stderr, ")\n");
835 fprintf(stderr, "(and\n");
836 dump_grep_expression_1(x->u.binary.left, in+1);
837 dump_grep_expression_1(x->u.binary.right, in+1);
839 fprintf(stderr, ")\n");
842 fprintf(stderr, "(or\n");
843 dump_grep_expression_1(x->u.binary.left, in+1);
844 dump_grep_expression_1(x->u.binary.right, in+1);
846 fprintf(stderr, ")\n");
851 static void dump_grep_expression(struct grep_opt *opt)
853 struct grep_expr *x = opt->pattern_expression;
856 fprintf(stderr, "[all-match]\n");
857 dump_grep_expression_1(x, 0);
861 static struct grep_expr *grep_true_expr(void)
863 struct grep_expr *z = xcalloc(1, sizeof(*z));
864 z->node = GREP_NODE_TRUE;
868 static struct grep_expr *grep_or_expr(struct grep_expr *left, struct grep_expr *right)
870 struct grep_expr *z = xcalloc(1, sizeof(*z));
871 z->node = GREP_NODE_OR;
872 z->u.binary.left = left;
873 z->u.binary.right = right;
877 static struct grep_expr *prep_header_patterns(struct grep_opt *opt)
880 struct grep_expr *header_expr;
881 struct grep_expr *(header_group[GREP_HEADER_FIELD_MAX]);
882 enum grep_header_field fld;
884 if (!opt->header_list)
887 for (p = opt->header_list; p; p = p->next) {
888 if (p->token != GREP_PATTERN_HEAD)
889 die("BUG: a non-header pattern in grep header list.");
890 if (p->field < GREP_HEADER_FIELD_MIN ||
891 GREP_HEADER_FIELD_MAX <= p->field)
892 die("BUG: unknown header field %d", p->field);
893 compile_regexp(p, opt);
896 for (fld = 0; fld < GREP_HEADER_FIELD_MAX; fld++)
897 header_group[fld] = NULL;
899 for (p = opt->header_list; p; p = p->next) {
901 struct grep_pat *pp = p;
903 h = compile_pattern_atom(&pp);
904 if (!h || pp != p->next)
905 die("BUG: malformed header expr");
906 if (!header_group[p->field]) {
907 header_group[p->field] = h;
910 header_group[p->field] = grep_or_expr(h, header_group[p->field]);
915 for (fld = 0; fld < GREP_HEADER_FIELD_MAX; fld++) {
916 if (!header_group[fld])
919 header_expr = grep_true_expr();
920 header_expr = grep_or_expr(header_group[fld], header_expr);
925 static struct grep_expr *grep_splice_or(struct grep_expr *x, struct grep_expr *y)
927 struct grep_expr *z = x;
930 assert(x->node == GREP_NODE_OR);
931 if (x->u.binary.right &&
932 x->u.binary.right->node == GREP_NODE_TRUE) {
933 x->u.binary.right = y;
936 x = x->u.binary.right;
941 static void compile_grep_patterns_real(struct grep_opt *opt)
944 struct grep_expr *header_expr = prep_header_patterns(opt);
946 for (p = opt->pattern_list; p; p = p->next) {
948 case GREP_PATTERN: /* atom */
949 case GREP_PATTERN_HEAD:
950 case GREP_PATTERN_BODY:
951 compile_regexp(p, opt);
959 if (opt->all_match || header_expr)
961 else if (!opt->extended && !opt->debug)
964 p = opt->pattern_list;
966 opt->pattern_expression = compile_pattern_expr(&p);
968 die("incomplete pattern expression: %s", p->pattern);
973 if (!opt->pattern_expression)
974 opt->pattern_expression = header_expr;
975 else if (opt->all_match)
976 opt->pattern_expression = grep_splice_or(header_expr,
977 opt->pattern_expression);
979 opt->pattern_expression = grep_or_expr(opt->pattern_expression,
984 void compile_grep_patterns(struct grep_opt *opt)
986 compile_grep_patterns_real(opt);
988 dump_grep_expression(opt);
991 static void free_pattern_expr(struct grep_expr *x)
998 free_pattern_expr(x->u.unary);
1002 free_pattern_expr(x->u.binary.left);
1003 free_pattern_expr(x->u.binary.right);
1009 void free_grep_patterns(struct grep_opt *opt)
1011 struct grep_pat *p, *n;
1013 for (p = opt->pattern_list; p; p = n) {
1016 case GREP_PATTERN: /* atom */
1017 case GREP_PATTERN_HEAD:
1018 case GREP_PATTERN_BODY:
1021 else if (p->pcre1_regexp)
1022 free_pcre1_regexp(p);
1023 else if (p->pcre2_pattern)
1024 free_pcre2_pattern(p);
1026 regfree(&p->regexp);
1037 free_pattern_expr(opt->pattern_expression);
1040 static char *end_of_line(char *cp, unsigned long *left)
1042 unsigned long l = *left;
1043 while (l && *cp != '\n') {
1051 static int word_char(char ch)
1053 return isalnum(ch) || ch == '_';
1056 static void output_color(struct grep_opt *opt, const void *data, size_t size,
1059 if (want_color(opt->color) && color && color[0]) {
1060 opt->output(opt, color, strlen(color));
1061 opt->output(opt, data, size);
1062 opt->output(opt, GIT_COLOR_RESET, strlen(GIT_COLOR_RESET));
1064 opt->output(opt, data, size);
1067 static void output_sep(struct grep_opt *opt, char sign)
1069 if (opt->null_following_name)
1070 opt->output(opt, "\0", 1);
1072 output_color(opt, &sign, 1, opt->color_sep);
1075 static void show_name(struct grep_opt *opt, const char *name)
1077 output_color(opt, name, strlen(name), opt->color_filename);
1078 opt->output(opt, opt->null_following_name ? "\0" : "\n", 1);
1081 static int fixmatch(struct grep_pat *p, char *line, char *eol,
1084 struct kwsmatch kwsm;
1085 size_t offset = kwsexec(p->kws, line, eol - line, &kwsm);
1087 match->rm_so = match->rm_eo = -1;
1090 match->rm_so = offset;
1091 match->rm_eo = match->rm_so + kwsm.size[0];
1096 static int patmatch(struct grep_pat *p, char *line, char *eol,
1097 regmatch_t *match, int eflags)
1102 hit = !fixmatch(p, line, eol, match);
1103 else if (p->pcre1_regexp)
1104 hit = !pcre1match(p, line, eol, match, eflags);
1105 else if (p->pcre2_pattern)
1106 hit = !pcre2match(p, line, eol, match, eflags);
1108 hit = !regexec_buf(&p->regexp, line, eol - line, 1, match,
1114 static int strip_timestamp(char *bol, char **eol_p)
1119 while (bol < --eol) {
1133 } header_field[] = {
1135 { "committer ", 10 },
1139 static int match_one_pattern(struct grep_pat *p, char *bol, char *eol,
1140 enum grep_context ctx,
1141 regmatch_t *pmatch, int eflags)
1145 const char *start = bol;
1147 if ((p->token != GREP_PATTERN) &&
1148 ((p->token == GREP_PATTERN_HEAD) != (ctx == GREP_CONTEXT_HEAD)))
1151 if (p->token == GREP_PATTERN_HEAD) {
1154 assert(p->field < ARRAY_SIZE(header_field));
1155 field = header_field[p->field].field;
1156 len = header_field[p->field].len;
1157 if (strncmp(bol, field, len))
1161 case GREP_HEADER_AUTHOR:
1162 case GREP_HEADER_COMMITTER:
1163 saved_ch = strip_timestamp(bol, &eol);
1171 hit = patmatch(p, bol, eol, pmatch, eflags);
1173 if (hit && p->word_regexp) {
1174 if ((pmatch[0].rm_so < 0) ||
1175 (eol - bol) < pmatch[0].rm_so ||
1176 (pmatch[0].rm_eo < 0) ||
1177 (eol - bol) < pmatch[0].rm_eo)
1178 die("regexp returned nonsense");
1180 /* Match beginning must be either beginning of the
1181 * line, or at word boundary (i.e. the last char must
1182 * not be a word char). Similarly, match end must be
1183 * either end of the line, or at word boundary
1184 * (i.e. the next char must not be a word char).
1186 if ( ((pmatch[0].rm_so == 0) ||
1187 !word_char(bol[pmatch[0].rm_so-1])) &&
1188 ((pmatch[0].rm_eo == (eol-bol)) ||
1189 !word_char(bol[pmatch[0].rm_eo])) )
1194 /* Words consist of at least one character. */
1195 if (pmatch->rm_so == pmatch->rm_eo)
1198 if (!hit && pmatch[0].rm_so + bol + 1 < eol) {
1199 /* There could be more than one match on the
1200 * line, and the first match might not be
1201 * strict word match. But later ones could be!
1202 * Forward to the next possible start, i.e. the
1203 * next position following a non-word char.
1205 bol = pmatch[0].rm_so + bol + 1;
1206 while (word_char(bol[-1]) && bol < eol)
1208 eflags |= REG_NOTBOL;
1213 if (p->token == GREP_PATTERN_HEAD && saved_ch)
1216 pmatch[0].rm_so += bol - start;
1217 pmatch[0].rm_eo += bol - start;
1222 static int match_expr_eval(struct grep_expr *x, char *bol, char *eol,
1223 enum grep_context ctx, int collect_hits)
1229 die("Not a valid grep expression");
1231 case GREP_NODE_TRUE:
1234 case GREP_NODE_ATOM:
1235 h = match_one_pattern(x->u.atom, bol, eol, ctx, &match, 0);
1238 h = !match_expr_eval(x->u.unary, bol, eol, ctx, 0);
1241 if (!match_expr_eval(x->u.binary.left, bol, eol, ctx, 0))
1243 h = match_expr_eval(x->u.binary.right, bol, eol, ctx, 0);
1247 return (match_expr_eval(x->u.binary.left,
1248 bol, eol, ctx, 0) ||
1249 match_expr_eval(x->u.binary.right,
1251 h = match_expr_eval(x->u.binary.left, bol, eol, ctx, 0);
1252 x->u.binary.left->hit |= h;
1253 h |= match_expr_eval(x->u.binary.right, bol, eol, ctx, 1);
1256 die("Unexpected node type (internal error) %d", x->node);
1263 static int match_expr(struct grep_opt *opt, char *bol, char *eol,
1264 enum grep_context ctx, int collect_hits)
1266 struct grep_expr *x = opt->pattern_expression;
1267 return match_expr_eval(x, bol, eol, ctx, collect_hits);
1270 static int match_line(struct grep_opt *opt, char *bol, char *eol,
1271 enum grep_context ctx, int collect_hits)
1277 return match_expr(opt, bol, eol, ctx, collect_hits);
1279 /* we do not call with collect_hits without being extended */
1280 for (p = opt->pattern_list; p; p = p->next) {
1281 if (match_one_pattern(p, bol, eol, ctx, &match, 0))
1287 static int match_next_pattern(struct grep_pat *p, char *bol, char *eol,
1288 enum grep_context ctx,
1289 regmatch_t *pmatch, int eflags)
1293 if (!match_one_pattern(p, bol, eol, ctx, &match, eflags))
1295 if (match.rm_so < 0 || match.rm_eo < 0)
1297 if (pmatch->rm_so >= 0 && pmatch->rm_eo >= 0) {
1298 if (match.rm_so > pmatch->rm_so)
1300 if (match.rm_so == pmatch->rm_so && match.rm_eo < pmatch->rm_eo)
1303 pmatch->rm_so = match.rm_so;
1304 pmatch->rm_eo = match.rm_eo;
1308 static int next_match(struct grep_opt *opt, char *bol, char *eol,
1309 enum grep_context ctx, regmatch_t *pmatch, int eflags)
1314 pmatch->rm_so = pmatch->rm_eo = -1;
1316 for (p = opt->pattern_list; p; p = p->next) {
1318 case GREP_PATTERN: /* atom */
1319 case GREP_PATTERN_HEAD:
1320 case GREP_PATTERN_BODY:
1321 hit |= match_next_pattern(p, bol, eol, ctx,
1332 static void show_line(struct grep_opt *opt, char *bol, char *eol,
1333 const char *name, unsigned lno, char sign)
1335 int rest = eol - bol;
1336 const char *match_color, *line_color = NULL;
1338 if (opt->file_break && opt->last_shown == 0) {
1339 if (opt->show_hunk_mark)
1340 opt->output(opt, "\n", 1);
1341 } else if (opt->pre_context || opt->post_context || opt->funcbody) {
1342 if (opt->last_shown == 0) {
1343 if (opt->show_hunk_mark) {
1344 output_color(opt, "--", 2, opt->color_sep);
1345 opt->output(opt, "\n", 1);
1347 } else if (lno > opt->last_shown + 1) {
1348 output_color(opt, "--", 2, opt->color_sep);
1349 opt->output(opt, "\n", 1);
1352 if (opt->heading && opt->last_shown == 0) {
1353 output_color(opt, name, strlen(name), opt->color_filename);
1354 opt->output(opt, "\n", 1);
1356 opt->last_shown = lno;
1358 if (!opt->heading && opt->pathname) {
1359 output_color(opt, name, strlen(name), opt->color_filename);
1360 output_sep(opt, sign);
1364 xsnprintf(buf, sizeof(buf), "%d", lno);
1365 output_color(opt, buf, strlen(buf), opt->color_lineno);
1366 output_sep(opt, sign);
1370 enum grep_context ctx = GREP_CONTEXT_BODY;
1375 match_color = opt->color_match_selected;
1377 match_color = opt->color_match_context;
1379 line_color = opt->color_selected;
1380 else if (sign == '-')
1381 line_color = opt->color_context;
1382 else if (sign == '=')
1383 line_color = opt->color_function;
1385 while (next_match(opt, bol, eol, ctx, &match, eflags)) {
1386 if (match.rm_so == match.rm_eo)
1389 output_color(opt, bol, match.rm_so, line_color);
1390 output_color(opt, bol + match.rm_so,
1391 match.rm_eo - match.rm_so, match_color);
1393 rest -= match.rm_eo;
1394 eflags = REG_NOTBOL;
1398 output_color(opt, bol, rest, line_color);
1399 opt->output(opt, "\n", 1);
1406 * This lock protects access to the gitattributes machinery, which is
1409 pthread_mutex_t grep_attr_mutex;
1411 static inline void grep_attr_lock(void)
1414 pthread_mutex_lock(&grep_attr_mutex);
1417 static inline void grep_attr_unlock(void)
1420 pthread_mutex_unlock(&grep_attr_mutex);
1424 * Same as git_attr_mutex, but protecting the thread-unsafe object db access.
1426 pthread_mutex_t grep_read_mutex;
1429 #define grep_attr_lock()
1430 #define grep_attr_unlock()
1433 static int match_funcname(struct grep_opt *opt, struct grep_source *gs, char *bol, char *eol)
1435 xdemitconf_t *xecfg = opt->priv;
1436 if (xecfg && !xecfg->find_func) {
1437 grep_source_load_driver(gs);
1438 if (gs->driver->funcname.pattern) {
1439 const struct userdiff_funcname *pe = &gs->driver->funcname;
1440 xdiff_set_find_func(xecfg, pe->pattern, pe->cflags);
1442 xecfg = opt->priv = NULL;
1448 return xecfg->find_func(bol, eol - bol, buf, 1,
1449 xecfg->find_func_priv) >= 0;
1454 if (isalpha(*bol) || *bol == '_' || *bol == '$')
1459 static void show_funcname_line(struct grep_opt *opt, struct grep_source *gs,
1460 char *bol, unsigned lno)
1462 while (bol > gs->buf) {
1465 while (bol > gs->buf && bol[-1] != '\n')
1469 if (lno <= opt->last_shown)
1472 if (match_funcname(opt, gs, bol, eol)) {
1473 show_line(opt, bol, eol, gs->name, lno, '=');
1479 static void show_pre_context(struct grep_opt *opt, struct grep_source *gs,
1480 char *bol, char *end, unsigned lno)
1482 unsigned cur = lno, from = 1, funcname_lno = 0;
1483 int funcname_needed = !!opt->funcname;
1485 if (opt->funcbody && !match_funcname(opt, gs, bol, end))
1486 funcname_needed = 2;
1488 if (opt->pre_context < lno)
1489 from = lno - opt->pre_context;
1490 if (from <= opt->last_shown)
1491 from = opt->last_shown + 1;
1494 while (bol > gs->buf &&
1495 cur > (funcname_needed == 2 ? opt->last_shown + 1 : from)) {
1498 while (bol > gs->buf && bol[-1] != '\n')
1501 if (funcname_needed && match_funcname(opt, gs, bol, eol)) {
1503 funcname_needed = 0;
1507 /* We need to look even further back to find a function signature. */
1508 if (opt->funcname && funcname_needed)
1509 show_funcname_line(opt, gs, bol, cur);
1513 char *eol = bol, sign = (cur == funcname_lno) ? '=' : '-';
1515 while (*eol != '\n')
1517 show_line(opt, bol, eol, gs->name, cur, sign);
1523 static int should_lookahead(struct grep_opt *opt)
1528 return 0; /* punt for too complex stuff */
1531 for (p = opt->pattern_list; p; p = p->next) {
1532 if (p->token != GREP_PATTERN)
1533 return 0; /* punt for "header only" and stuff */
1538 static int look_ahead(struct grep_opt *opt,
1539 unsigned long *left_p,
1543 unsigned lno = *lno_p;
1546 char *sp, *last_bol;
1547 regoff_t earliest = -1;
1549 for (p = opt->pattern_list; p; p = p->next) {
1553 hit = patmatch(p, bol, bol + *left_p, &m, 0);
1554 if (!hit || m.rm_so < 0 || m.rm_eo < 0)
1556 if (earliest < 0 || m.rm_so < earliest)
1561 *bol_p = bol + *left_p;
1565 for (sp = bol + earliest; bol < sp && sp[-1] != '\n'; sp--)
1566 ; /* find the beginning of the line */
1569 for (sp = bol; sp < last_bol; sp++) {
1573 *left_p -= last_bol - bol;
1579 static int fill_textconv_grep(struct userdiff_driver *driver,
1580 struct grep_source *gs)
1582 struct diff_filespec *df;
1586 if (!driver || !driver->textconv)
1587 return grep_source_load(gs);
1590 * The textconv interface is intimately tied to diff_filespecs, so we
1591 * have to pretend to be one. If we could unify the grep_source
1592 * and diff_filespec structs, this mess could just go away.
1594 df = alloc_filespec(gs->path);
1596 case GREP_SOURCE_OID:
1597 fill_filespec(df, gs->identifier, 1, 0100644);
1599 case GREP_SOURCE_FILE:
1600 fill_filespec(df, &null_oid, 0, 0100644);
1603 die("BUG: attempt to textconv something without a path?");
1607 * fill_textconv is not remotely thread-safe; it may load objects
1608 * behind the scenes, and it modifies the global diff tempfile
1612 size = fill_textconv(driver, df, &buf);
1617 * The normal fill_textconv usage by the diff machinery would just keep
1618 * the textconv'd buf separate from the diff_filespec. But much of the
1619 * grep code passes around a grep_source and assumes that its "buf"
1620 * pointer is the beginning of the thing we are searching. So let's
1621 * install our textconv'd version into the grep_source, taking care not
1622 * to leak any existing buffer.
1624 grep_source_clear_data(gs);
1631 static int is_empty_line(const char *bol, const char *eol)
1633 while (bol < eol && isspace(*bol))
1638 static int grep_source_1(struct grep_opt *opt, struct grep_source *gs, int collect_hits)
1641 char *peek_bol = NULL;
1644 unsigned last_hit = 0;
1645 int binary_match_only = 0;
1647 int try_lookahead = 0;
1648 int show_function = 0;
1649 struct userdiff_driver *textconv = NULL;
1650 enum grep_context ctx = GREP_CONTEXT_HEAD;
1654 opt->output = std_output;
1656 if (opt->pre_context || opt->post_context || opt->file_break ||
1658 /* Show hunk marks, except for the first file. */
1659 if (opt->last_shown)
1660 opt->show_hunk_mark = 1;
1662 * If we're using threads then we can't easily identify
1663 * the first file. Always put hunk marks in that case
1664 * and skip the very first one later in work_done().
1666 if (opt->output != std_output)
1667 opt->show_hunk_mark = 1;
1669 opt->last_shown = 0;
1671 if (opt->allow_textconv) {
1672 grep_source_load_driver(gs);
1674 * We might set up the shared textconv cache data here, which
1675 * is not thread-safe.
1678 textconv = userdiff_get_textconv(gs->driver);
1683 * We know the result of a textconv is text, so we only have to care
1684 * about binary handling if we are not using it.
1687 switch (opt->binary) {
1688 case GREP_BINARY_DEFAULT:
1689 if (grep_source_is_binary(gs))
1690 binary_match_only = 1;
1692 case GREP_BINARY_NOMATCH:
1693 if (grep_source_is_binary(gs))
1694 return 0; /* Assume unmatch */
1696 case GREP_BINARY_TEXT:
1699 die("BUG: unknown binary handling mode");
1703 memset(&xecfg, 0, sizeof(xecfg));
1706 try_lookahead = should_lookahead(opt);
1708 if (fill_textconv_grep(textconv, gs) < 0)
1718 * look_ahead() skips quickly to the line that possibly
1719 * has the next hit; don't call it if we need to do
1720 * something more than just skipping the current line
1721 * in response to an unmatch for the current line. E.g.
1722 * inside a post-context window, we will show the current
1723 * line as a context around the previous hit when it
1728 && (show_function ||
1729 lno <= last_hit + opt->post_context))
1730 && look_ahead(opt, &left, &lno, &bol))
1732 eol = end_of_line(bol, &left);
1736 if ((ctx == GREP_CONTEXT_HEAD) && (eol == bol))
1737 ctx = GREP_CONTEXT_BODY;
1739 hit = match_line(opt, bol, eol, ctx, collect_hits);
1745 /* "grep -v -e foo -e bla" should list lines
1746 * that do not have either, so inversion should
1751 if (opt->unmatch_name_only) {
1758 if (opt->status_only)
1760 if (opt->name_only) {
1761 show_name(opt, gs->name);
1766 if (binary_match_only) {
1767 opt->output(opt, "Binary file ", 12);
1768 output_color(opt, gs->name, strlen(gs->name),
1769 opt->color_filename);
1770 opt->output(opt, " matches\n", 9);
1773 /* Hit at this line. If we haven't shown the
1774 * pre-context lines, we would need to show them.
1776 if (opt->pre_context || opt->funcbody)
1777 show_pre_context(opt, gs, bol, eol, lno);
1778 else if (opt->funcname)
1779 show_funcname_line(opt, gs, bol, lno);
1780 show_line(opt, bol, eol, gs->name, lno, ':');
1786 if (show_function && (!peek_bol || peek_bol < bol)) {
1787 unsigned long peek_left = left;
1788 char *peek_eol = eol;
1791 * Trailing empty lines are not interesting.
1792 * Peek past them to see if they belong to the
1793 * body of the current function.
1796 while (is_empty_line(peek_bol, peek_eol)) {
1797 peek_bol = peek_eol + 1;
1798 peek_eol = end_of_line(peek_bol, &peek_left);
1801 if (match_funcname(opt, gs, peek_bol, peek_eol))
1804 if (show_function ||
1805 (last_hit && lno <= last_hit + opt->post_context)) {
1806 /* If the last hit is within the post context,
1807 * we need to show this line.
1809 show_line(opt, bol, eol, gs->name, lno, '-');
1823 if (opt->status_only)
1824 return opt->unmatch_name_only;
1825 if (opt->unmatch_name_only) {
1826 /* We did not see any hit, so we want to show this */
1827 show_name(opt, gs->name);
1831 xdiff_clear_find_func(&xecfg);
1835 * The real "grep -c foo *.c" gives many "bar.c:0" lines,
1836 * which feels mostly useless but sometimes useful. Maybe
1837 * make it another option? For now suppress them.
1839 if (opt->count && count) {
1841 if (opt->pathname) {
1842 output_color(opt, gs->name, strlen(gs->name),
1843 opt->color_filename);
1844 output_sep(opt, ':');
1846 xsnprintf(buf, sizeof(buf), "%u\n", count);
1847 opt->output(opt, buf, strlen(buf));
1853 static void clr_hit_marker(struct grep_expr *x)
1855 /* All-hit markers are meaningful only at the very top level
1860 if (x->node != GREP_NODE_OR)
1862 x->u.binary.left->hit = 0;
1863 x = x->u.binary.right;
1867 static int chk_hit_marker(struct grep_expr *x)
1869 /* Top level nodes have hit markers. See if they all are hits */
1871 if (x->node != GREP_NODE_OR)
1873 if (!x->u.binary.left->hit)
1875 x = x->u.binary.right;
1879 int grep_source(struct grep_opt *opt, struct grep_source *gs)
1882 * we do not have to do the two-pass grep when we do not check
1883 * buffer-wide "all-match".
1885 if (!opt->all_match)
1886 return grep_source_1(opt, gs, 0);
1888 /* Otherwise the toplevel "or" terms hit a bit differently.
1889 * We first clear hit markers from them.
1891 clr_hit_marker(opt->pattern_expression);
1892 grep_source_1(opt, gs, 1);
1894 if (!chk_hit_marker(opt->pattern_expression))
1897 return grep_source_1(opt, gs, 0);
1900 int grep_buffer(struct grep_opt *opt, char *buf, unsigned long size)
1902 struct grep_source gs;
1905 grep_source_init(&gs, GREP_SOURCE_BUF, NULL, NULL, NULL);
1909 r = grep_source(opt, &gs);
1911 grep_source_clear(&gs);
1915 void grep_source_init(struct grep_source *gs, enum grep_source_type type,
1916 const char *name, const char *path,
1917 const void *identifier)
1920 gs->name = xstrdup_or_null(name);
1921 gs->path = xstrdup_or_null(path);
1927 case GREP_SOURCE_FILE:
1928 gs->identifier = xstrdup(identifier);
1930 case GREP_SOURCE_SUBMODULE:
1932 gs->identifier = NULL;
1937 * If the identifier is non-NULL (in the submodule case) it
1938 * will be a SHA1 that needs to be copied.
1940 case GREP_SOURCE_OID:
1941 gs->identifier = oiddup(identifier);
1943 case GREP_SOURCE_BUF:
1944 gs->identifier = NULL;
1949 void grep_source_clear(struct grep_source *gs)
1951 FREE_AND_NULL(gs->name);
1952 FREE_AND_NULL(gs->path);
1953 FREE_AND_NULL(gs->identifier);
1954 grep_source_clear_data(gs);
1957 void grep_source_clear_data(struct grep_source *gs)
1960 case GREP_SOURCE_FILE:
1961 case GREP_SOURCE_OID:
1962 case GREP_SOURCE_SUBMODULE:
1963 FREE_AND_NULL(gs->buf);
1966 case GREP_SOURCE_BUF:
1967 /* leave user-provided buf intact */
1972 static int grep_source_load_oid(struct grep_source *gs)
1974 enum object_type type;
1977 gs->buf = read_sha1_file(gs->identifier, &type, &gs->size);
1981 return error(_("'%s': unable to read %s"),
1983 oid_to_hex(gs->identifier));
1987 static int grep_source_load_file(struct grep_source *gs)
1989 const char *filename = gs->identifier;
1995 if (lstat(filename, &st) < 0) {
1997 if (errno != ENOENT)
1998 error_errno(_("failed to stat '%s'"), filename);
2001 if (!S_ISREG(st.st_mode))
2003 size = xsize_t(st.st_size);
2004 i = open(filename, O_RDONLY);
2007 data = xmallocz(size);
2008 if (st.st_size != read_in_full(i, data, size)) {
2009 error_errno(_("'%s': short read"), filename);
2021 static int grep_source_load(struct grep_source *gs)
2027 case GREP_SOURCE_FILE:
2028 return grep_source_load_file(gs);
2029 case GREP_SOURCE_OID:
2030 return grep_source_load_oid(gs);
2031 case GREP_SOURCE_BUF:
2032 return gs->buf ? 0 : -1;
2033 case GREP_SOURCE_SUBMODULE:
2036 die("BUG: invalid grep_source type to load");
2039 void grep_source_load_driver(struct grep_source *gs)
2046 gs->driver = userdiff_find_by_path(gs->path);
2048 gs->driver = userdiff_find_by_name("default");
2052 static int grep_source_is_binary(struct grep_source *gs)
2054 grep_source_load_driver(gs);
2055 if (gs->driver->binary != -1)
2056 return gs->driver->binary;
2058 if (!grep_source_load(gs))
2059 return buffer_is_binary(gs->buf, gs->size);