4 #include "xdiff-interface.h"
6 static int grep_source_load(struct grep_source *gs);
7 static int grep_source_is_binary(struct grep_source *gs);
9 static struct grep_opt grep_defaults;
12 * Initialize the grep_defaults template with hardcoded defaults.
13 * We could let the compiler do this, but without C99 initializers
14 * the code gets unwieldy and unreadable, so...
16 void init_grep_defaults(void)
18 struct grep_opt *opt = &grep_defaults;
20 memset(opt, 0, sizeof(*opt));
23 opt->regflags = REG_NEWLINE;
25 opt->pattern_type_option = GREP_PATTERN_TYPE_UNSPECIFIED;
26 opt->extended_regexp_option = 0;
27 strcpy(opt->color_context, "");
28 strcpy(opt->color_filename, "");
29 strcpy(opt->color_function, "");
30 strcpy(opt->color_lineno, "");
31 strcpy(opt->color_match, GIT_COLOR_BOLD_RED);
32 strcpy(opt->color_selected, "");
33 strcpy(opt->color_sep, GIT_COLOR_CYAN);
37 static int parse_pattern_type_arg(const char *opt, const char *arg)
39 if (!strcmp(arg, "default"))
40 return GREP_PATTERN_TYPE_UNSPECIFIED;
41 else if (!strcmp(arg, "basic"))
42 return GREP_PATTERN_TYPE_BRE;
43 else if (!strcmp(arg, "extended"))
44 return GREP_PATTERN_TYPE_ERE;
45 else if (!strcmp(arg, "fixed"))
46 return GREP_PATTERN_TYPE_FIXED;
47 else if (!strcmp(arg, "perl"))
48 return GREP_PATTERN_TYPE_PCRE;
49 die("bad %s argument: %s", opt, arg);
53 * Read the configuration file once and store it in
54 * the grep_defaults template.
56 int grep_config(const char *var, const char *value, void *cb)
58 struct grep_opt *opt = &grep_defaults;
61 if (userdiff_config(var, value) < 0)
64 if (!strcmp(var, "grep.extendedregexp")) {
65 if (git_config_bool(var, value))
66 opt->extended_regexp_option = 1;
68 opt->extended_regexp_option = 0;
72 if (!strcmp(var, "grep.patterntype")) {
73 opt->pattern_type_option = parse_pattern_type_arg(var, value);
77 if (!strcmp(var, "grep.linenumber")) {
78 opt->linenum = git_config_bool(var, value);
82 if (!strcmp(var, "color.grep"))
83 opt->color = git_config_colorbool(var, value);
84 else if (!strcmp(var, "color.grep.context"))
85 color = opt->color_context;
86 else if (!strcmp(var, "color.grep.filename"))
87 color = opt->color_filename;
88 else if (!strcmp(var, "color.grep.function"))
89 color = opt->color_function;
90 else if (!strcmp(var, "color.grep.linenumber"))
91 color = opt->color_lineno;
92 else if (!strcmp(var, "color.grep.match"))
93 color = opt->color_match;
94 else if (!strcmp(var, "color.grep.selected"))
95 color = opt->color_selected;
96 else if (!strcmp(var, "color.grep.separator"))
97 color = opt->color_sep;
101 return config_error_nonbool(var);
102 color_parse(value, var, color);
108 * Initialize one instance of grep_opt and copy the
109 * default values from the template we read the configuration
110 * information in an earlier call to git_config(grep_config).
112 void grep_init(struct grep_opt *opt, const char *prefix)
114 struct grep_opt *def = &grep_defaults;
116 memset(opt, 0, sizeof(*opt));
117 opt->prefix = prefix;
118 opt->prefix_length = (prefix && *prefix) ? strlen(prefix) : 0;
119 opt->pattern_tail = &opt->pattern_list;
120 opt->header_tail = &opt->header_list;
122 opt->color = def->color;
123 opt->extended_regexp_option = def->extended_regexp_option;
124 opt->pattern_type_option = def->pattern_type_option;
125 opt->linenum = def->linenum;
126 opt->max_depth = def->max_depth;
127 opt->pathname = def->pathname;
128 opt->regflags = def->regflags;
129 opt->relative = def->relative;
131 strcpy(opt->color_context, def->color_context);
132 strcpy(opt->color_filename, def->color_filename);
133 strcpy(opt->color_function, def->color_function);
134 strcpy(opt->color_lineno, def->color_lineno);
135 strcpy(opt->color_match, def->color_match);
136 strcpy(opt->color_selected, def->color_selected);
137 strcpy(opt->color_sep, def->color_sep);
140 void grep_commit_pattern_type(enum grep_pattern_type pattern_type, struct grep_opt *opt)
142 if (pattern_type != GREP_PATTERN_TYPE_UNSPECIFIED)
143 grep_set_pattern_type_option(pattern_type, opt);
144 else if (opt->pattern_type_option != GREP_PATTERN_TYPE_UNSPECIFIED)
145 grep_set_pattern_type_option(opt->pattern_type_option, opt);
146 else if (opt->extended_regexp_option)
147 grep_set_pattern_type_option(GREP_PATTERN_TYPE_ERE, opt);
150 void grep_set_pattern_type_option(enum grep_pattern_type pattern_type, struct grep_opt *opt)
152 switch (pattern_type) {
153 case GREP_PATTERN_TYPE_UNSPECIFIED:
156 case GREP_PATTERN_TYPE_BRE:
159 opt->regflags &= ~REG_EXTENDED;
162 case GREP_PATTERN_TYPE_ERE:
165 opt->regflags |= REG_EXTENDED;
168 case GREP_PATTERN_TYPE_FIXED:
171 opt->regflags &= ~REG_EXTENDED;
174 case GREP_PATTERN_TYPE_PCRE:
177 opt->regflags &= ~REG_EXTENDED;
182 static struct grep_pat *create_grep_pat(const char *pat, size_t patlen,
183 const char *origin, int no,
184 enum grep_pat_token t,
185 enum grep_header_field field)
187 struct grep_pat *p = xcalloc(1, sizeof(*p));
188 p->pattern = xmemdupz(pat, patlen);
189 p->patternlen = patlen;
197 static void do_append_grep_pat(struct grep_pat ***tail, struct grep_pat *p)
204 case GREP_PATTERN: /* atom */
205 case GREP_PATTERN_HEAD:
206 case GREP_PATTERN_BODY:
208 struct grep_pat *new_pat;
210 char *cp = p->pattern + p->patternlen, *nl = NULL;
211 while (++len <= p->patternlen) {
212 if (*(--cp) == '\n') {
219 new_pat = create_grep_pat(nl + 1, len - 1, p->origin,
220 p->no, p->token, p->field);
221 new_pat->next = p->next;
223 *tail = &new_pat->next;
226 p->patternlen -= len;
234 void append_header_grep_pattern(struct grep_opt *opt,
235 enum grep_header_field field, const char *pat)
237 struct grep_pat *p = create_grep_pat(pat, strlen(pat), "header", 0,
238 GREP_PATTERN_HEAD, field);
239 if (field == GREP_HEADER_REFLOG)
240 opt->use_reflog_filter = 1;
241 do_append_grep_pat(&opt->header_tail, p);
244 void append_grep_pattern(struct grep_opt *opt, const char *pat,
245 const char *origin, int no, enum grep_pat_token t)
247 append_grep_pat(opt, pat, strlen(pat), origin, no, t);
250 void append_grep_pat(struct grep_opt *opt, const char *pat, size_t patlen,
251 const char *origin, int no, enum grep_pat_token t)
253 struct grep_pat *p = create_grep_pat(pat, patlen, origin, no, t, 0);
254 do_append_grep_pat(&opt->pattern_tail, p);
257 struct grep_opt *grep_opt_dup(const struct grep_opt *opt)
259 struct grep_pat *pat;
260 struct grep_opt *ret = xmalloc(sizeof(struct grep_opt));
263 ret->pattern_list = NULL;
264 ret->pattern_tail = &ret->pattern_list;
266 for(pat = opt->pattern_list; pat != NULL; pat = pat->next)
268 if(pat->token == GREP_PATTERN_HEAD)
269 append_header_grep_pattern(ret, pat->field,
272 append_grep_pat(ret, pat->pattern, pat->patternlen,
273 pat->origin, pat->no, pat->token);
279 static NORETURN void compile_regexp_failed(const struct grep_pat *p,
285 sprintf(where, "In '%s' at %d, ", p->origin, p->no);
287 sprintf(where, "%s, ", p->origin);
291 die("%s'%s': %s", where, p->pattern, error);
295 static void compile_pcre_regexp(struct grep_pat *p, const struct grep_opt *opt)
299 int options = PCRE_MULTILINE;
301 if (opt->ignore_case)
302 options |= PCRE_CASELESS;
304 p->pcre_regexp = pcre_compile(p->pattern, options, &error, &erroffset,
307 compile_regexp_failed(p, error);
309 p->pcre_extra_info = pcre_study(p->pcre_regexp, 0, &error);
310 if (!p->pcre_extra_info && error)
314 static int pcrematch(struct grep_pat *p, const char *line, const char *eol,
315 regmatch_t *match, int eflags)
317 int ovector[30], ret, flags = 0;
319 if (eflags & REG_NOTBOL)
320 flags |= PCRE_NOTBOL;
322 ret = pcre_exec(p->pcre_regexp, p->pcre_extra_info, line, eol - line,
323 0, flags, ovector, ARRAY_SIZE(ovector));
324 if (ret < 0 && ret != PCRE_ERROR_NOMATCH)
325 die("pcre_exec failed with error code %d", ret);
328 match->rm_so = ovector[0];
329 match->rm_eo = ovector[1];
335 static void free_pcre_regexp(struct grep_pat *p)
337 pcre_free(p->pcre_regexp);
338 pcre_free(p->pcre_extra_info);
340 #else /* !USE_LIBPCRE */
341 static void compile_pcre_regexp(struct grep_pat *p, const struct grep_opt *opt)
343 die("cannot use Perl-compatible regexes when not compiled with USE_LIBPCRE");
346 static int pcrematch(struct grep_pat *p, const char *line, const char *eol,
347 regmatch_t *match, int eflags)
352 static void free_pcre_regexp(struct grep_pat *p)
355 #endif /* !USE_LIBPCRE */
357 static int is_fixed(const char *s, size_t len)
361 /* regcomp cannot accept patterns with NULs so we
362 * consider any pattern containing a NUL fixed.
364 if (memchr(s, 0, len))
367 for (i = 0; i < len; i++) {
368 if (is_regex_special(s[i]))
375 static void compile_regexp(struct grep_pat *p, struct grep_opt *opt)
379 p->word_regexp = opt->word_regexp;
380 p->ignore_case = opt->ignore_case;
382 if (opt->fixed || is_fixed(p->pattern, p->patternlen))
388 if (opt->regflags & REG_ICASE || p->ignore_case)
389 p->kws = kwsalloc(tolower_trans_tbl);
391 p->kws = kwsalloc(NULL);
392 kwsincr(p->kws, p->pattern, p->patternlen);
398 compile_pcre_regexp(p, opt);
402 err = regcomp(&p->regexp, p->pattern, opt->regflags);
405 regerror(err, &p->regexp, errbuf, 1024);
407 compile_regexp_failed(p, errbuf);
411 static struct grep_expr *compile_pattern_or(struct grep_pat **);
412 static struct grep_expr *compile_pattern_atom(struct grep_pat **list)
421 case GREP_PATTERN: /* atom */
422 case GREP_PATTERN_HEAD:
423 case GREP_PATTERN_BODY:
424 x = xcalloc(1, sizeof (struct grep_expr));
425 x->node = GREP_NODE_ATOM;
429 case GREP_OPEN_PAREN:
431 x = compile_pattern_or(list);
432 if (!*list || (*list)->token != GREP_CLOSE_PAREN)
433 die("unmatched parenthesis");
434 *list = (*list)->next;
441 static struct grep_expr *compile_pattern_not(struct grep_pat **list)
452 die("--not not followed by pattern expression");
454 x = xcalloc(1, sizeof (struct grep_expr));
455 x->node = GREP_NODE_NOT;
456 x->u.unary = compile_pattern_not(list);
458 die("--not followed by non pattern expression");
461 return compile_pattern_atom(list);
465 static struct grep_expr *compile_pattern_and(struct grep_pat **list)
468 struct grep_expr *x, *y, *z;
470 x = compile_pattern_not(list);
472 if (p && p->token == GREP_AND) {
474 die("--and not followed by pattern expression");
476 y = compile_pattern_and(list);
478 die("--and not followed by pattern expression");
479 z = xcalloc(1, sizeof (struct grep_expr));
480 z->node = GREP_NODE_AND;
481 z->u.binary.left = x;
482 z->u.binary.right = y;
488 static struct grep_expr *compile_pattern_or(struct grep_pat **list)
491 struct grep_expr *x, *y, *z;
493 x = compile_pattern_and(list);
495 if (x && p && p->token != GREP_CLOSE_PAREN) {
496 y = compile_pattern_or(list);
498 die("not a pattern expression %s", p->pattern);
499 z = xcalloc(1, sizeof (struct grep_expr));
500 z->node = GREP_NODE_OR;
501 z->u.binary.left = x;
502 z->u.binary.right = y;
508 static struct grep_expr *compile_pattern_expr(struct grep_pat **list)
510 return compile_pattern_or(list);
513 static void indent(int in)
519 static void dump_grep_pat(struct grep_pat *p)
522 case GREP_AND: fprintf(stderr, "*and*"); break;
523 case GREP_OPEN_PAREN: fprintf(stderr, "*(*"); break;
524 case GREP_CLOSE_PAREN: fprintf(stderr, "*)*"); break;
525 case GREP_NOT: fprintf(stderr, "*not*"); break;
526 case GREP_OR: fprintf(stderr, "*or*"); break;
528 case GREP_PATTERN: fprintf(stderr, "pattern"); break;
529 case GREP_PATTERN_HEAD: fprintf(stderr, "pattern_head"); break;
530 case GREP_PATTERN_BODY: fprintf(stderr, "pattern_body"); break;
535 case GREP_PATTERN_HEAD:
536 fprintf(stderr, "<head %d>", p->field); break;
537 case GREP_PATTERN_BODY:
538 fprintf(stderr, "<body>"); break;
542 case GREP_PATTERN_HEAD:
543 case GREP_PATTERN_BODY:
545 fprintf(stderr, "%.*s", (int)p->patternlen, p->pattern);
551 static void dump_grep_expression_1(struct grep_expr *x, int in)
556 fprintf(stderr, "true\n");
559 dump_grep_pat(x->u.atom);
562 fprintf(stderr, "(not\n");
563 dump_grep_expression_1(x->u.unary, in+1);
565 fprintf(stderr, ")\n");
568 fprintf(stderr, "(and\n");
569 dump_grep_expression_1(x->u.binary.left, in+1);
570 dump_grep_expression_1(x->u.binary.right, in+1);
572 fprintf(stderr, ")\n");
575 fprintf(stderr, "(or\n");
576 dump_grep_expression_1(x->u.binary.left, in+1);
577 dump_grep_expression_1(x->u.binary.right, in+1);
579 fprintf(stderr, ")\n");
584 static void dump_grep_expression(struct grep_opt *opt)
586 struct grep_expr *x = opt->pattern_expression;
589 fprintf(stderr, "[all-match]\n");
590 dump_grep_expression_1(x, 0);
594 static struct grep_expr *grep_true_expr(void)
596 struct grep_expr *z = xcalloc(1, sizeof(*z));
597 z->node = GREP_NODE_TRUE;
601 static struct grep_expr *grep_or_expr(struct grep_expr *left, struct grep_expr *right)
603 struct grep_expr *z = xcalloc(1, sizeof(*z));
604 z->node = GREP_NODE_OR;
605 z->u.binary.left = left;
606 z->u.binary.right = right;
610 static struct grep_expr *prep_header_patterns(struct grep_opt *opt)
613 struct grep_expr *header_expr;
614 struct grep_expr *(header_group[GREP_HEADER_FIELD_MAX]);
615 enum grep_header_field fld;
617 if (!opt->header_list)
620 for (p = opt->header_list; p; p = p->next) {
621 if (p->token != GREP_PATTERN_HEAD)
622 die("bug: a non-header pattern in grep header list.");
623 if (p->field < 0 || GREP_HEADER_FIELD_MAX <= p->field)
624 die("bug: unknown header field %d", p->field);
625 compile_regexp(p, opt);
628 for (fld = 0; fld < GREP_HEADER_FIELD_MAX; fld++)
629 header_group[fld] = NULL;
631 for (p = opt->header_list; p; p = p->next) {
633 struct grep_pat *pp = p;
635 h = compile_pattern_atom(&pp);
636 if (!h || pp != p->next)
637 die("bug: malformed header expr");
638 if (!header_group[p->field]) {
639 header_group[p->field] = h;
642 header_group[p->field] = grep_or_expr(h, header_group[p->field]);
647 for (fld = 0; fld < GREP_HEADER_FIELD_MAX; fld++) {
648 if (!header_group[fld])
651 header_expr = grep_true_expr();
652 header_expr = grep_or_expr(header_group[fld], header_expr);
657 static struct grep_expr *grep_splice_or(struct grep_expr *x, struct grep_expr *y)
659 struct grep_expr *z = x;
662 assert(x->node == GREP_NODE_OR);
663 if (x->u.binary.right &&
664 x->u.binary.right->node == GREP_NODE_TRUE) {
665 x->u.binary.right = y;
668 x = x->u.binary.right;
673 static void compile_grep_patterns_real(struct grep_opt *opt)
676 struct grep_expr *header_expr = prep_header_patterns(opt);
678 for (p = opt->pattern_list; p; p = p->next) {
680 case GREP_PATTERN: /* atom */
681 case GREP_PATTERN_HEAD:
682 case GREP_PATTERN_BODY:
683 compile_regexp(p, opt);
691 if (opt->all_match || header_expr)
693 else if (!opt->extended && !opt->debug)
696 p = opt->pattern_list;
698 opt->pattern_expression = compile_pattern_expr(&p);
700 die("incomplete pattern expression: %s", p->pattern);
705 if (!opt->pattern_expression)
706 opt->pattern_expression = header_expr;
707 else if (opt->all_match)
708 opt->pattern_expression = grep_splice_or(header_expr,
709 opt->pattern_expression);
711 opt->pattern_expression = grep_or_expr(opt->pattern_expression,
716 void compile_grep_patterns(struct grep_opt *opt)
718 compile_grep_patterns_real(opt);
720 dump_grep_expression(opt);
723 static void free_pattern_expr(struct grep_expr *x)
730 free_pattern_expr(x->u.unary);
734 free_pattern_expr(x->u.binary.left);
735 free_pattern_expr(x->u.binary.right);
741 void free_grep_patterns(struct grep_opt *opt)
743 struct grep_pat *p, *n;
745 for (p = opt->pattern_list; p; p = n) {
748 case GREP_PATTERN: /* atom */
749 case GREP_PATTERN_HEAD:
750 case GREP_PATTERN_BODY:
753 else if (p->pcre_regexp)
767 free_pattern_expr(opt->pattern_expression);
770 static char *end_of_line(char *cp, unsigned long *left)
772 unsigned long l = *left;
773 while (l && *cp != '\n') {
781 static int word_char(char ch)
783 return isalnum(ch) || ch == '_';
786 static void output_color(struct grep_opt *opt, const void *data, size_t size,
789 if (want_color(opt->color) && color && color[0]) {
790 opt->output(opt, color, strlen(color));
791 opt->output(opt, data, size);
792 opt->output(opt, GIT_COLOR_RESET, strlen(GIT_COLOR_RESET));
794 opt->output(opt, data, size);
797 static void output_sep(struct grep_opt *opt, char sign)
799 if (opt->null_following_name)
800 opt->output(opt, "\0", 1);
802 output_color(opt, &sign, 1, opt->color_sep);
805 static void show_name(struct grep_opt *opt, const char *name)
807 output_color(opt, name, strlen(name), opt->color_filename);
808 opt->output(opt, opt->null_following_name ? "\0" : "\n", 1);
811 static int fixmatch(struct grep_pat *p, char *line, char *eol,
814 struct kwsmatch kwsm;
815 size_t offset = kwsexec(p->kws, line, eol - line, &kwsm);
817 match->rm_so = match->rm_eo = -1;
820 match->rm_so = offset;
821 match->rm_eo = match->rm_so + kwsm.size[0];
826 static int regmatch(const regex_t *preg, char *line, char *eol,
827 regmatch_t *match, int eflags)
831 match->rm_eo = eol - line;
832 eflags |= REG_STARTEND;
834 return regexec(preg, line, 1, match, eflags);
837 static int patmatch(struct grep_pat *p, char *line, char *eol,
838 regmatch_t *match, int eflags)
843 hit = !fixmatch(p, line, eol, match);
844 else if (p->pcre_regexp)
845 hit = !pcrematch(p, line, eol, match, eflags);
847 hit = !regmatch(&p->regexp, line, eol, match, eflags);
852 static int strip_timestamp(char *bol, char **eol_p)
857 while (bol < --eol) {
873 { "committer ", 10 },
877 static int match_one_pattern(struct grep_pat *p, char *bol, char *eol,
878 enum grep_context ctx,
879 regmatch_t *pmatch, int eflags)
883 const char *start = bol;
885 if ((p->token != GREP_PATTERN) &&
886 ((p->token == GREP_PATTERN_HEAD) != (ctx == GREP_CONTEXT_HEAD)))
889 if (p->token == GREP_PATTERN_HEAD) {
892 assert(p->field < ARRAY_SIZE(header_field));
893 field = header_field[p->field].field;
894 len = header_field[p->field].len;
895 if (strncmp(bol, field, len))
899 case GREP_HEADER_AUTHOR:
900 case GREP_HEADER_COMMITTER:
901 saved_ch = strip_timestamp(bol, &eol);
909 hit = patmatch(p, bol, eol, pmatch, eflags);
911 if (hit && p->word_regexp) {
912 if ((pmatch[0].rm_so < 0) ||
913 (eol - bol) < pmatch[0].rm_so ||
914 (pmatch[0].rm_eo < 0) ||
915 (eol - bol) < pmatch[0].rm_eo)
916 die("regexp returned nonsense");
918 /* Match beginning must be either beginning of the
919 * line, or at word boundary (i.e. the last char must
920 * not be a word char). Similarly, match end must be
921 * either end of the line, or at word boundary
922 * (i.e. the next char must not be a word char).
924 if ( ((pmatch[0].rm_so == 0) ||
925 !word_char(bol[pmatch[0].rm_so-1])) &&
926 ((pmatch[0].rm_eo == (eol-bol)) ||
927 !word_char(bol[pmatch[0].rm_eo])) )
932 /* Words consist of at least one character. */
933 if (pmatch->rm_so == pmatch->rm_eo)
936 if (!hit && pmatch[0].rm_so + bol + 1 < eol) {
937 /* There could be more than one match on the
938 * line, and the first match might not be
939 * strict word match. But later ones could be!
940 * Forward to the next possible start, i.e. the
941 * next position following a non-word char.
943 bol = pmatch[0].rm_so + bol + 1;
944 while (word_char(bol[-1]) && bol < eol)
946 eflags |= REG_NOTBOL;
951 if (p->token == GREP_PATTERN_HEAD && saved_ch)
954 pmatch[0].rm_so += bol - start;
955 pmatch[0].rm_eo += bol - start;
960 static int match_expr_eval(struct grep_expr *x, char *bol, char *eol,
961 enum grep_context ctx, int collect_hits)
967 die("Not a valid grep expression");
973 h = match_one_pattern(x->u.atom, bol, eol, ctx, &match, 0);
976 h = !match_expr_eval(x->u.unary, bol, eol, ctx, 0);
979 if (!match_expr_eval(x->u.binary.left, bol, eol, ctx, 0))
981 h = match_expr_eval(x->u.binary.right, bol, eol, ctx, 0);
985 return (match_expr_eval(x->u.binary.left,
987 match_expr_eval(x->u.binary.right,
989 h = match_expr_eval(x->u.binary.left, bol, eol, ctx, 0);
990 x->u.binary.left->hit |= h;
991 h |= match_expr_eval(x->u.binary.right, bol, eol, ctx, 1);
994 die("Unexpected node type (internal error) %d", x->node);
1001 static int match_expr(struct grep_opt *opt, char *bol, char *eol,
1002 enum grep_context ctx, int collect_hits)
1004 struct grep_expr *x = opt->pattern_expression;
1005 return match_expr_eval(x, bol, eol, ctx, collect_hits);
1008 static int match_line(struct grep_opt *opt, char *bol, char *eol,
1009 enum grep_context ctx, int collect_hits)
1015 return match_expr(opt, bol, eol, ctx, collect_hits);
1017 /* we do not call with collect_hits without being extended */
1018 for (p = opt->pattern_list; p; p = p->next) {
1019 if (match_one_pattern(p, bol, eol, ctx, &match, 0))
1025 static int match_next_pattern(struct grep_pat *p, char *bol, char *eol,
1026 enum grep_context ctx,
1027 regmatch_t *pmatch, int eflags)
1031 if (!match_one_pattern(p, bol, eol, ctx, &match, eflags))
1033 if (match.rm_so < 0 || match.rm_eo < 0)
1035 if (pmatch->rm_so >= 0 && pmatch->rm_eo >= 0) {
1036 if (match.rm_so > pmatch->rm_so)
1038 if (match.rm_so == pmatch->rm_so && match.rm_eo < pmatch->rm_eo)
1041 pmatch->rm_so = match.rm_so;
1042 pmatch->rm_eo = match.rm_eo;
1046 static int next_match(struct grep_opt *opt, char *bol, char *eol,
1047 enum grep_context ctx, regmatch_t *pmatch, int eflags)
1052 pmatch->rm_so = pmatch->rm_eo = -1;
1054 for (p = opt->pattern_list; p; p = p->next) {
1056 case GREP_PATTERN: /* atom */
1057 case GREP_PATTERN_HEAD:
1058 case GREP_PATTERN_BODY:
1059 hit |= match_next_pattern(p, bol, eol, ctx,
1070 static void show_line(struct grep_opt *opt, char *bol, char *eol,
1071 const char *name, unsigned lno, char sign)
1073 int rest = eol - bol;
1074 char *line_color = NULL;
1076 if (opt->file_break && opt->last_shown == 0) {
1077 if (opt->show_hunk_mark)
1078 opt->output(opt, "\n", 1);
1079 } else if (opt->pre_context || opt->post_context || opt->funcbody) {
1080 if (opt->last_shown == 0) {
1081 if (opt->show_hunk_mark) {
1082 output_color(opt, "--", 2, opt->color_sep);
1083 opt->output(opt, "\n", 1);
1085 } else if (lno > opt->last_shown + 1) {
1086 output_color(opt, "--", 2, opt->color_sep);
1087 opt->output(opt, "\n", 1);
1090 if (opt->heading && opt->last_shown == 0) {
1091 output_color(opt, name, strlen(name), opt->color_filename);
1092 opt->output(opt, "\n", 1);
1094 opt->last_shown = lno;
1096 if (!opt->heading && opt->pathname) {
1097 output_color(opt, name, strlen(name), opt->color_filename);
1098 output_sep(opt, sign);
1102 snprintf(buf, sizeof(buf), "%d", lno);
1103 output_color(opt, buf, strlen(buf), opt->color_lineno);
1104 output_sep(opt, sign);
1108 enum grep_context ctx = GREP_CONTEXT_BODY;
1113 line_color = opt->color_selected;
1114 else if (sign == '-')
1115 line_color = opt->color_context;
1116 else if (sign == '=')
1117 line_color = opt->color_function;
1119 while (next_match(opt, bol, eol, ctx, &match, eflags)) {
1120 if (match.rm_so == match.rm_eo)
1123 output_color(opt, bol, match.rm_so, line_color);
1124 output_color(opt, bol + match.rm_so,
1125 match.rm_eo - match.rm_so,
1128 rest -= match.rm_eo;
1129 eflags = REG_NOTBOL;
1133 output_color(opt, bol, rest, line_color);
1134 opt->output(opt, "\n", 1);
1141 * This lock protects access to the gitattributes machinery, which is
1144 pthread_mutex_t grep_attr_mutex;
1146 static inline void grep_attr_lock(void)
1149 pthread_mutex_lock(&grep_attr_mutex);
1152 static inline void grep_attr_unlock(void)
1155 pthread_mutex_unlock(&grep_attr_mutex);
1159 * Same as git_attr_mutex, but protecting the thread-unsafe object db access.
1161 pthread_mutex_t grep_read_mutex;
1164 #define grep_attr_lock()
1165 #define grep_attr_unlock()
1168 static int match_funcname(struct grep_opt *opt, struct grep_source *gs, char *bol, char *eol)
1170 xdemitconf_t *xecfg = opt->priv;
1171 if (xecfg && !xecfg->find_func) {
1172 grep_source_load_driver(gs);
1173 if (gs->driver->funcname.pattern) {
1174 const struct userdiff_funcname *pe = &gs->driver->funcname;
1175 xdiff_set_find_func(xecfg, pe->pattern, pe->cflags);
1177 xecfg = opt->priv = NULL;
1183 return xecfg->find_func(bol, eol - bol, buf, 1,
1184 xecfg->find_func_priv) >= 0;
1189 if (isalpha(*bol) || *bol == '_' || *bol == '$')
1194 static void show_funcname_line(struct grep_opt *opt, struct grep_source *gs,
1195 char *bol, unsigned lno)
1197 while (bol > gs->buf) {
1200 while (bol > gs->buf && bol[-1] != '\n')
1204 if (lno <= opt->last_shown)
1207 if (match_funcname(opt, gs, bol, eol)) {
1208 show_line(opt, bol, eol, gs->name, lno, '=');
1214 static void show_pre_context(struct grep_opt *opt, struct grep_source *gs,
1215 char *bol, char *end, unsigned lno)
1217 unsigned cur = lno, from = 1, funcname_lno = 0;
1218 int funcname_needed = !!opt->funcname;
1220 if (opt->funcbody && !match_funcname(opt, gs, bol, end))
1221 funcname_needed = 2;
1223 if (opt->pre_context < lno)
1224 from = lno - opt->pre_context;
1225 if (from <= opt->last_shown)
1226 from = opt->last_shown + 1;
1229 while (bol > gs->buf &&
1230 cur > (funcname_needed == 2 ? opt->last_shown + 1 : from)) {
1233 while (bol > gs->buf && bol[-1] != '\n')
1236 if (funcname_needed && match_funcname(opt, gs, bol, eol)) {
1238 funcname_needed = 0;
1242 /* We need to look even further back to find a function signature. */
1243 if (opt->funcname && funcname_needed)
1244 show_funcname_line(opt, gs, bol, cur);
1248 char *eol = bol, sign = (cur == funcname_lno) ? '=' : '-';
1250 while (*eol != '\n')
1252 show_line(opt, bol, eol, gs->name, cur, sign);
1258 static int should_lookahead(struct grep_opt *opt)
1263 return 0; /* punt for too complex stuff */
1266 for (p = opt->pattern_list; p; p = p->next) {
1267 if (p->token != GREP_PATTERN)
1268 return 0; /* punt for "header only" and stuff */
1273 static int look_ahead(struct grep_opt *opt,
1274 unsigned long *left_p,
1278 unsigned lno = *lno_p;
1281 char *sp, *last_bol;
1282 regoff_t earliest = -1;
1284 for (p = opt->pattern_list; p; p = p->next) {
1288 hit = patmatch(p, bol, bol + *left_p, &m, 0);
1289 if (!hit || m.rm_so < 0 || m.rm_eo < 0)
1291 if (earliest < 0 || m.rm_so < earliest)
1296 *bol_p = bol + *left_p;
1300 for (sp = bol + earliest; bol < sp && sp[-1] != '\n'; sp--)
1301 ; /* find the beginning of the line */
1304 for (sp = bol; sp < last_bol; sp++) {
1308 *left_p -= last_bol - bol;
1314 static void std_output(struct grep_opt *opt, const void *buf, size_t size)
1316 fwrite(buf, size, 1, stdout);
1319 static int grep_source_1(struct grep_opt *opt, struct grep_source *gs, int collect_hits)
1324 unsigned last_hit = 0;
1325 int binary_match_only = 0;
1327 int try_lookahead = 0;
1328 int show_function = 0;
1329 enum grep_context ctx = GREP_CONTEXT_HEAD;
1333 opt->output = std_output;
1335 if (opt->pre_context || opt->post_context || opt->file_break ||
1337 /* Show hunk marks, except for the first file. */
1338 if (opt->last_shown)
1339 opt->show_hunk_mark = 1;
1341 * If we're using threads then we can't easily identify
1342 * the first file. Always put hunk marks in that case
1343 * and skip the very first one later in work_done().
1345 if (opt->output != std_output)
1346 opt->show_hunk_mark = 1;
1348 opt->last_shown = 0;
1350 switch (opt->binary) {
1351 case GREP_BINARY_DEFAULT:
1352 if (grep_source_is_binary(gs))
1353 binary_match_only = 1;
1355 case GREP_BINARY_NOMATCH:
1356 if (grep_source_is_binary(gs))
1357 return 0; /* Assume unmatch */
1359 case GREP_BINARY_TEXT:
1362 die("bug: unknown binary handling mode");
1365 memset(&xecfg, 0, sizeof(xecfg));
1368 try_lookahead = should_lookahead(opt);
1370 if (grep_source_load(gs) < 0)
1380 * look_ahead() skips quickly to the line that possibly
1381 * has the next hit; don't call it if we need to do
1382 * something more than just skipping the current line
1383 * in response to an unmatch for the current line. E.g.
1384 * inside a post-context window, we will show the current
1385 * line as a context around the previous hit when it
1390 && (show_function ||
1391 lno <= last_hit + opt->post_context))
1392 && look_ahead(opt, &left, &lno, &bol))
1394 eol = end_of_line(bol, &left);
1398 if ((ctx == GREP_CONTEXT_HEAD) && (eol == bol))
1399 ctx = GREP_CONTEXT_BODY;
1401 hit = match_line(opt, bol, eol, ctx, collect_hits);
1407 /* "grep -v -e foo -e bla" should list lines
1408 * that do not have either, so inversion should
1413 if (opt->unmatch_name_only) {
1420 if (opt->status_only)
1422 if (opt->name_only) {
1423 show_name(opt, gs->name);
1428 if (binary_match_only) {
1429 opt->output(opt, "Binary file ", 12);
1430 output_color(opt, gs->name, strlen(gs->name),
1431 opt->color_filename);
1432 opt->output(opt, " matches\n", 9);
1435 /* Hit at this line. If we haven't shown the
1436 * pre-context lines, we would need to show them.
1438 if (opt->pre_context || opt->funcbody)
1439 show_pre_context(opt, gs, bol, eol, lno);
1440 else if (opt->funcname)
1441 show_funcname_line(opt, gs, bol, lno);
1442 show_line(opt, bol, eol, gs->name, lno, ':');
1448 if (show_function && match_funcname(opt, gs, bol, eol))
1450 if (show_function ||
1451 (last_hit && lno <= last_hit + opt->post_context)) {
1452 /* If the last hit is within the post context,
1453 * we need to show this line.
1455 show_line(opt, bol, eol, gs->name, lno, '-');
1469 if (opt->status_only)
1471 if (opt->unmatch_name_only) {
1472 /* We did not see any hit, so we want to show this */
1473 show_name(opt, gs->name);
1477 xdiff_clear_find_func(&xecfg);
1481 * The real "grep -c foo *.c" gives many "bar.c:0" lines,
1482 * which feels mostly useless but sometimes useful. Maybe
1483 * make it another option? For now suppress them.
1485 if (opt->count && count) {
1487 output_color(opt, gs->name, strlen(gs->name), opt->color_filename);
1488 output_sep(opt, ':');
1489 snprintf(buf, sizeof(buf), "%u\n", count);
1490 opt->output(opt, buf, strlen(buf));
1496 static void clr_hit_marker(struct grep_expr *x)
1498 /* All-hit markers are meaningful only at the very top level
1503 if (x->node != GREP_NODE_OR)
1505 x->u.binary.left->hit = 0;
1506 x = x->u.binary.right;
1510 static int chk_hit_marker(struct grep_expr *x)
1512 /* Top level nodes have hit markers. See if they all are hits */
1514 if (x->node != GREP_NODE_OR)
1516 if (!x->u.binary.left->hit)
1518 x = x->u.binary.right;
1522 int grep_source(struct grep_opt *opt, struct grep_source *gs)
1525 * we do not have to do the two-pass grep when we do not check
1526 * buffer-wide "all-match".
1528 if (!opt->all_match)
1529 return grep_source_1(opt, gs, 0);
1531 /* Otherwise the toplevel "or" terms hit a bit differently.
1532 * We first clear hit markers from them.
1534 clr_hit_marker(opt->pattern_expression);
1535 grep_source_1(opt, gs, 1);
1537 if (!chk_hit_marker(opt->pattern_expression))
1540 return grep_source_1(opt, gs, 0);
1543 int grep_buffer(struct grep_opt *opt, char *buf, unsigned long size)
1545 struct grep_source gs;
1548 grep_source_init(&gs, GREP_SOURCE_BUF, NULL, NULL);
1552 r = grep_source(opt, &gs);
1554 grep_source_clear(&gs);
1558 void grep_source_init(struct grep_source *gs, enum grep_source_type type,
1559 const char *name, const void *identifier)
1562 gs->name = name ? xstrdup(name) : NULL;
1568 case GREP_SOURCE_FILE:
1569 gs->identifier = xstrdup(identifier);
1571 case GREP_SOURCE_SHA1:
1572 gs->identifier = xmalloc(20);
1573 memcpy(gs->identifier, identifier, 20);
1575 case GREP_SOURCE_BUF:
1576 gs->identifier = NULL;
1580 void grep_source_clear(struct grep_source *gs)
1584 free(gs->identifier);
1585 gs->identifier = NULL;
1586 grep_source_clear_data(gs);
1589 void grep_source_clear_data(struct grep_source *gs)
1592 case GREP_SOURCE_FILE:
1593 case GREP_SOURCE_SHA1:
1598 case GREP_SOURCE_BUF:
1599 /* leave user-provided buf intact */
1604 static int grep_source_load_sha1(struct grep_source *gs)
1606 enum object_type type;
1609 gs->buf = read_sha1_file(gs->identifier, &type, &gs->size);
1613 return error(_("'%s': unable to read %s"),
1615 sha1_to_hex(gs->identifier));
1619 static int grep_source_load_file(struct grep_source *gs)
1621 const char *filename = gs->identifier;
1627 if (lstat(filename, &st) < 0) {
1629 if (errno != ENOENT)
1630 error(_("'%s': %s"), filename, strerror(errno));
1633 if (!S_ISREG(st.st_mode))
1635 size = xsize_t(st.st_size);
1636 i = open(filename, O_RDONLY);
1639 data = xmalloc(size + 1);
1640 if (st.st_size != read_in_full(i, data, size)) {
1641 error(_("'%s': short read %s"), filename, strerror(errno));
1654 static int grep_source_load(struct grep_source *gs)
1660 case GREP_SOURCE_FILE:
1661 return grep_source_load_file(gs);
1662 case GREP_SOURCE_SHA1:
1663 return grep_source_load_sha1(gs);
1664 case GREP_SOURCE_BUF:
1665 return gs->buf ? 0 : -1;
1667 die("BUG: invalid grep_source type");
1670 void grep_source_load_driver(struct grep_source *gs)
1676 gs->driver = userdiff_find_by_path(gs->name);
1678 gs->driver = userdiff_find_by_name("default");
1682 static int grep_source_is_binary(struct grep_source *gs)
1684 grep_source_load_driver(gs);
1685 if (gs->driver->binary != -1)
1686 return gs->driver->binary;
1688 if (!grep_source_load(gs))
1689 return buffer_is_binary(gs->buf, gs->size);