1 #include "git-compat-util.h"
6 #include "object-store.h"
8 #include "xdiff-interface.h"
16 static int grep_source_load(struct grep_source
*gs
);
17 static int grep_source_is_binary(struct grep_source
*gs
,
18 struct index_state
*istate
);
20 static void std_output(struct grep_opt
*opt
, const void *buf
, size_t size
)
22 fwrite(buf
, size
, 1, stdout
);
25 static const char *color_grep_slots
[] = {
26 [GREP_COLOR_CONTEXT
] = "context",
27 [GREP_COLOR_FILENAME
] = "filename",
28 [GREP_COLOR_FUNCTION
] = "function",
29 [GREP_COLOR_LINENO
] = "lineNumber",
30 [GREP_COLOR_COLUMNNO
] = "column",
31 [GREP_COLOR_MATCH_CONTEXT
] = "matchContext",
32 [GREP_COLOR_MATCH_SELECTED
] = "matchSelected",
33 [GREP_COLOR_SELECTED
] = "selected",
34 [GREP_COLOR_SEP
] = "separator",
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
);
52 define_list_config_array_extra(color_grep_slots
, {"match"});
55 * Read the configuration file once and store it in
56 * the grep_defaults template.
58 int grep_config(const char *var
, const char *value
, void *cb
)
60 struct grep_opt
*opt
= cb
;
63 if (userdiff_config(var
, value
) < 0)
66 if (!strcmp(var
, "grep.extendedregexp")) {
67 opt
->extended_regexp_option
= git_config_bool(var
, value
);
71 if (!strcmp(var
, "grep.patterntype")) {
72 opt
->pattern_type_option
= parse_pattern_type_arg(var
, value
);
76 if (!strcmp(var
, "grep.linenumber")) {
77 opt
->linenum
= git_config_bool(var
, value
);
80 if (!strcmp(var
, "grep.column")) {
81 opt
->columnnum
= git_config_bool(var
, value
);
85 if (!strcmp(var
, "grep.fullname")) {
86 opt
->relative
= !git_config_bool(var
, value
);
90 if (!strcmp(var
, "color.grep"))
91 opt
->color
= git_config_colorbool(var
, value
);
92 if (!strcmp(var
, "color.grep.match")) {
93 if (grep_config("color.grep.matchcontext", value
, cb
) < 0)
95 if (grep_config("color.grep.matchselected", value
, cb
) < 0)
97 } else if (skip_prefix(var
, "color.grep.", &slot
)) {
98 int i
= LOOKUP_CONFIG(color_grep_slots
, slot
);
103 color
= opt
->colors
[i
];
105 return config_error_nonbool(var
);
106 return color_parse(value
, color
);
111 void grep_init(struct grep_opt
*opt
, struct repository
*repo
)
113 struct grep_opt blank
= GREP_OPT_INIT
;
114 memcpy(opt
, &blank
, sizeof(*opt
));
117 opt
->pattern_tail
= &opt
->pattern_list
;
118 opt
->header_tail
= &opt
->header_list
;
121 static struct grep_pat
*create_grep_pat(const char *pat
, size_t patlen
,
122 const char *origin
, int no
,
123 enum grep_pat_token t
,
124 enum grep_header_field field
)
126 struct grep_pat
*p
= xcalloc(1, sizeof(*p
));
127 p
->pattern
= xmemdupz(pat
, patlen
);
128 p
->patternlen
= patlen
;
136 static void do_append_grep_pat(struct grep_pat
***tail
, struct grep_pat
*p
)
143 case GREP_PATTERN
: /* atom */
144 case GREP_PATTERN_HEAD
:
145 case GREP_PATTERN_BODY
:
147 struct grep_pat
*new_pat
;
149 char *cp
= p
->pattern
+ p
->patternlen
, *nl
= NULL
;
150 while (++len
<= p
->patternlen
) {
151 if (*(--cp
) == '\n') {
158 new_pat
= create_grep_pat(nl
+ 1, len
- 1, p
->origin
,
159 p
->no
, p
->token
, p
->field
);
160 new_pat
->next
= p
->next
;
162 *tail
= &new_pat
->next
;
165 p
->patternlen
-= len
;
173 void append_header_grep_pattern(struct grep_opt
*opt
,
174 enum grep_header_field field
, const char *pat
)
176 struct grep_pat
*p
= create_grep_pat(pat
, strlen(pat
), "header", 0,
177 GREP_PATTERN_HEAD
, field
);
178 if (field
== GREP_HEADER_REFLOG
)
179 opt
->use_reflog_filter
= 1;
180 do_append_grep_pat(&opt
->header_tail
, p
);
183 void append_grep_pattern(struct grep_opt
*opt
, const char *pat
,
184 const char *origin
, int no
, enum grep_pat_token t
)
186 append_grep_pat(opt
, pat
, strlen(pat
), origin
, no
, t
);
189 void append_grep_pat(struct grep_opt
*opt
, const char *pat
, size_t patlen
,
190 const char *origin
, int no
, enum grep_pat_token t
)
192 struct grep_pat
*p
= create_grep_pat(pat
, patlen
, origin
, no
, t
, 0);
193 do_append_grep_pat(&opt
->pattern_tail
, p
);
196 struct grep_opt
*grep_opt_dup(const struct grep_opt
*opt
)
198 struct grep_pat
*pat
;
199 struct grep_opt
*ret
= xmalloc(sizeof(struct grep_opt
));
202 ret
->pattern_list
= NULL
;
203 ret
->pattern_tail
= &ret
->pattern_list
;
205 for(pat
= opt
->pattern_list
; pat
!= NULL
; pat
= pat
->next
)
207 if(pat
->token
== GREP_PATTERN_HEAD
)
208 append_header_grep_pattern(ret
, pat
->field
,
211 append_grep_pat(ret
, pat
->pattern
, pat
->patternlen
,
212 pat
->origin
, pat
->no
, pat
->token
);
218 static NORETURN
void compile_regexp_failed(const struct grep_pat
*p
,
224 xsnprintf(where
, sizeof(where
), "In '%s' at %d, ", p
->origin
, p
->no
);
226 xsnprintf(where
, sizeof(where
), "%s, ", p
->origin
);
230 die("%s'%s': %s", where
, p
->pattern
, error
);
233 static int is_fixed(const char *s
, size_t len
)
237 for (i
= 0; i
< len
; i
++) {
238 if (is_regex_special(s
[i
]))
246 #define GREP_PCRE2_DEBUG_MALLOC 0
248 static void *pcre2_malloc(PCRE2_SIZE size
, MAYBE_UNUSED
void *memory_data
)
250 void *pointer
= malloc(size
);
251 #if GREP_PCRE2_DEBUG_MALLOC
252 static int count
= 1;
253 fprintf(stderr
, "PCRE2:%p -> #%02d: alloc(%lu)\n", pointer
, count
++, size
);
258 static void pcre2_free(void *pointer
, MAYBE_UNUSED
void *memory_data
)
260 #if GREP_PCRE2_DEBUG_MALLOC
261 static int count
= 1;
263 fprintf(stderr
, "PCRE2:%p -> #%02d: free()\n", pointer
, count
++);
268 static int pcre2_jit_functional(void)
270 static int jit_working
= -1;
275 if (jit_working
!= -1)
279 * Try to JIT compile a simple pattern to probe if the JIT is
280 * working in general. It might fail for systems where creating
281 * memory mappings for runtime code generation is restricted.
283 code
= pcre2_compile((PCRE2_SPTR
)".", 1, 0, &err
, &off
, NULL
);
287 jit_working
= pcre2_jit_compile(code
, PCRE2_JIT_COMPLETE
) == 0;
288 pcre2_code_free(code
);
293 static void compile_pcre2_pattern(struct grep_pat
*p
, const struct grep_opt
*opt
)
296 PCRE2_UCHAR errbuf
[256];
297 PCRE2_SIZE erroffset
;
298 int options
= PCRE2_MULTILINE
;
302 int literal
= !opt
->ignore_case
&& (p
->fixed
|| p
->is_fixed
);
305 * Call pcre2_general_context_create() before calling any
306 * other pcre2_*(). It sets up our malloc()/free() functions
307 * with which everything else is allocated.
309 p
->pcre2_general_context
= pcre2_general_context_create(
310 pcre2_malloc
, pcre2_free
, NULL
);
311 if (!p
->pcre2_general_context
)
312 die("Couldn't allocate PCRE2 general context");
314 if (opt
->ignore_case
) {
315 if (!opt
->ignore_locale
&& has_non_ascii(p
->pattern
)) {
316 p
->pcre2_tables
= pcre2_maketables(p
->pcre2_general_context
);
317 p
->pcre2_compile_context
= pcre2_compile_context_create(p
->pcre2_general_context
);
318 pcre2_set_character_tables(p
->pcre2_compile_context
,
321 options
|= PCRE2_CASELESS
;
323 if (!opt
->ignore_locale
&& is_utf8_locale() && !literal
)
324 options
|= (PCRE2_UTF
| PCRE2_UCP
| PCRE2_MATCH_INVALID_UTF
);
326 #ifndef GIT_PCRE2_VERSION_10_35_OR_HIGHER
328 * Work around a JIT bug related to invalid Unicode character handling
330 * https://github.com/PCRE2Project/pcre2/commit/c21bd977547d
332 options
&= ~PCRE2_UCP
;
335 #ifndef GIT_PCRE2_VERSION_10_36_OR_HIGHER
336 /* Work around https://bugs.exim.org/show_bug.cgi?id=2642 fixed in 10.36 */
337 if (PCRE2_MATCH_INVALID_UTF
&& options
& (PCRE2_UTF
| PCRE2_CASELESS
))
338 options
|= PCRE2_NO_START_OPTIMIZE
;
341 p
->pcre2_pattern
= pcre2_compile((PCRE2_SPTR
)p
->pattern
,
342 p
->patternlen
, options
, &error
, &erroffset
,
343 p
->pcre2_compile_context
);
345 if (p
->pcre2_pattern
) {
346 p
->pcre2_match_data
= pcre2_match_data_create_from_pattern(p
->pcre2_pattern
, p
->pcre2_general_context
);
347 if (!p
->pcre2_match_data
)
348 die("Couldn't allocate PCRE2 match data");
350 pcre2_get_error_message(error
, errbuf
, sizeof(errbuf
));
351 compile_regexp_failed(p
, (const char *)&errbuf
);
354 pcre2_config(PCRE2_CONFIG_JIT
, &p
->pcre2_jit_on
);
355 if (p
->pcre2_jit_on
) {
356 jitret
= pcre2_jit_compile(p
->pcre2_pattern
, PCRE2_JIT_COMPLETE
);
357 if (jitret
== PCRE2_ERROR_NOMEMORY
&& !pcre2_jit_functional()) {
359 * Even though pcre2_config(PCRE2_CONFIG_JIT, ...)
360 * indicated JIT support, the library might still
361 * fail to generate JIT code for various reasons,
362 * e.g. when SELinux's 'deny_execmem' or PaX's
363 * MPROTECT prevent creating W|X memory mappings.
365 * Instead of faling hard, fall back to interpreter
366 * mode, just as if the pattern was prefixed with
372 int need_clip
= p
->patternlen
> 64;
373 int clip_len
= need_clip
? 64 : p
->patternlen
;
374 die("Couldn't JIT the PCRE2 pattern '%.*s'%s, got '%d'%s",
375 clip_len
, p
->pattern
, need_clip
? "..." : "", jitret
,
376 pcre2_jit_functional()
377 ? "\nPerhaps prefix (*NO_JIT) to your pattern?"
382 * The pcre2_config(PCRE2_CONFIG_JIT, ...) call just
383 * tells us whether the library itself supports JIT,
384 * but to see whether we're going to be actually using
385 * JIT we need to extract PCRE2_INFO_JITSIZE from the
386 * pattern *after* we do pcre2_jit_compile() above.
388 * This is because if the pattern contains the
389 * (*NO_JIT) verb (see pcre2syntax(3))
390 * pcre2_jit_compile() will exit early with 0. If we
391 * then proceed to call pcre2_jit_match() further down
392 * the line instead of pcre2_match() we'll either
393 * segfault (pre PCRE 10.31) or run into a fatal error
396 patinforet
= pcre2_pattern_info(p
->pcre2_pattern
, PCRE2_INFO_JITSIZE
, &jitsizearg
);
398 BUG("pcre2_pattern_info() failed: %d", patinforet
);
399 if (jitsizearg
== 0) {
406 static int pcre2match(struct grep_pat
*p
, const char *line
, const char *eol
,
407 regmatch_t
*match
, int eflags
)
411 PCRE2_UCHAR errbuf
[256];
413 if (eflags
& REG_NOTBOL
)
414 flags
|= PCRE2_NOTBOL
;
417 ret
= pcre2_jit_match(p
->pcre2_pattern
, (unsigned char *)line
,
418 eol
- line
, 0, flags
, p
->pcre2_match_data
,
421 ret
= pcre2_match(p
->pcre2_pattern
, (unsigned char *)line
,
422 eol
- line
, 0, flags
, p
->pcre2_match_data
,
425 if (ret
< 0 && ret
!= PCRE2_ERROR_NOMATCH
) {
426 pcre2_get_error_message(ret
, errbuf
, sizeof(errbuf
));
427 die("%s failed with error code %d: %s",
428 (p
->pcre2_jit_on
? "pcre2_jit_match" : "pcre2_match"), ret
,
432 ovector
= pcre2_get_ovector_pointer(p
->pcre2_match_data
);
434 match
->rm_so
= (int)ovector
[0];
435 match
->rm_eo
= (int)ovector
[1];
441 static void free_pcre2_pattern(struct grep_pat
*p
)
443 pcre2_compile_context_free(p
->pcre2_compile_context
);
444 pcre2_code_free(p
->pcre2_pattern
);
445 pcre2_match_data_free(p
->pcre2_match_data
);
446 #ifdef GIT_PCRE2_VERSION_10_34_OR_HIGHER
447 pcre2_maketables_free(p
->pcre2_general_context
, p
->pcre2_tables
);
449 free((void *)p
->pcre2_tables
);
451 pcre2_general_context_free(p
->pcre2_general_context
);
453 #else /* !USE_LIBPCRE2 */
454 static void compile_pcre2_pattern(struct grep_pat
*p
, const struct grep_opt
*opt
)
456 die("cannot use Perl-compatible regexes when not compiled with USE_LIBPCRE");
459 static int pcre2match(struct grep_pat
*p
, const char *line
, const char *eol
,
460 regmatch_t
*match
, int eflags
)
465 static void free_pcre2_pattern(struct grep_pat
*p
)
469 static void compile_fixed_regexp(struct grep_pat
*p
, struct grep_opt
*opt
)
471 struct strbuf sb
= STRBUF_INIT
;
475 basic_regex_quote_buf(&sb
, p
->pattern
);
476 if (opt
->ignore_case
)
477 regflags
|= REG_ICASE
;
478 err
= regcomp(&p
->regexp
, sb
.buf
, regflags
);
482 regerror(err
, &p
->regexp
, errbuf
, sizeof(errbuf
));
483 compile_regexp_failed(p
, errbuf
);
486 #endif /* !USE_LIBPCRE2 */
488 static void compile_regexp(struct grep_pat
*p
, struct grep_opt
*opt
)
491 int regflags
= REG_NEWLINE
;
493 if (opt
->pattern_type_option
== GREP_PATTERN_TYPE_UNSPECIFIED
)
494 opt
->pattern_type_option
= (opt
->extended_regexp_option
495 ? GREP_PATTERN_TYPE_ERE
496 : GREP_PATTERN_TYPE_BRE
);
498 p
->word_regexp
= opt
->word_regexp
;
499 p
->ignore_case
= opt
->ignore_case
;
500 p
->fixed
= opt
->pattern_type_option
== GREP_PATTERN_TYPE_FIXED
;
502 if (opt
->pattern_type_option
!= GREP_PATTERN_TYPE_PCRE
&&
503 memchr(p
->pattern
, 0, p
->patternlen
))
504 die(_("given pattern contains NULL byte (via -f <file>). This is only supported with -P under PCRE v2"));
506 p
->is_fixed
= is_fixed(p
->pattern
, p
->patternlen
);
508 if (!p
->fixed
&& !p
->is_fixed
) {
509 const char *no_jit
= "(*NO_JIT)";
510 const int no_jit_len
= strlen(no_jit
);
511 if (starts_with(p
->pattern
, no_jit
) &&
512 is_fixed(p
->pattern
+ no_jit_len
,
513 p
->patternlen
- no_jit_len
))
517 if (p
->fixed
|| p
->is_fixed
) {
520 compile_pcre2_pattern(p
, opt
);
523 * E.g. t7811-grep-open.sh relies on the
524 * pattern being restored.
526 char *old_pattern
= p
->pattern
;
527 size_t old_patternlen
= p
->patternlen
;
528 struct strbuf sb
= STRBUF_INIT
;
531 * There is the PCRE2_LITERAL flag, but it's
532 * only in PCRE v2 10.30 and later. Needing to
533 * ifdef our way around that and dealing with
534 * it + PCRE2_MULTILINE being an error is more
535 * complex than just quoting this ourselves.
537 strbuf_add(&sb
, "\\Q", 2);
538 strbuf_add(&sb
, p
->pattern
, p
->patternlen
);
539 strbuf_add(&sb
, "\\E", 2);
542 p
->patternlen
= sb
.len
;
543 compile_pcre2_pattern(p
, opt
);
544 p
->pattern
= old_pattern
;
545 p
->patternlen
= old_patternlen
;
548 #else /* !USE_LIBPCRE2 */
549 compile_fixed_regexp(p
, opt
);
550 #endif /* !USE_LIBPCRE2 */
554 if (opt
->pattern_type_option
== GREP_PATTERN_TYPE_PCRE
) {
555 compile_pcre2_pattern(p
, opt
);
560 regflags
|= REG_ICASE
;
561 if (opt
->pattern_type_option
== GREP_PATTERN_TYPE_ERE
)
562 regflags
|= REG_EXTENDED
;
563 err
= regcomp(&p
->regexp
, p
->pattern
, regflags
);
566 regerror(err
, &p
->regexp
, errbuf
, 1024);
567 compile_regexp_failed(p
, errbuf
);
571 static struct grep_expr
*grep_not_expr(struct grep_expr
*expr
)
573 struct grep_expr
*z
= xcalloc(1, sizeof(*z
));
574 z
->node
= GREP_NODE_NOT
;
579 static struct grep_expr
*grep_binexp(enum grep_expr_node kind
,
580 struct grep_expr
*left
,
581 struct grep_expr
*right
)
583 struct grep_expr
*z
= xcalloc(1, sizeof(*z
));
585 z
->u
.binary
.left
= left
;
586 z
->u
.binary
.right
= right
;
590 static struct grep_expr
*grep_or_expr(struct grep_expr
*left
, struct grep_expr
*right
)
592 return grep_binexp(GREP_NODE_OR
, left
, right
);
595 static struct grep_expr
*grep_and_expr(struct grep_expr
*left
, struct grep_expr
*right
)
597 return grep_binexp(GREP_NODE_AND
, left
, right
);
600 static struct grep_expr
*compile_pattern_or(struct grep_pat
**);
601 static struct grep_expr
*compile_pattern_atom(struct grep_pat
**list
)
610 case GREP_PATTERN
: /* atom */
611 case GREP_PATTERN_HEAD
:
612 case GREP_PATTERN_BODY
:
614 x
->node
= GREP_NODE_ATOM
;
618 case GREP_OPEN_PAREN
:
620 x
= compile_pattern_or(list
);
621 if (!*list
|| (*list
)->token
!= GREP_CLOSE_PAREN
)
622 die("unmatched parenthesis");
623 *list
= (*list
)->next
;
630 static struct grep_expr
*compile_pattern_not(struct grep_pat
**list
)
641 die("--not not followed by pattern expression");
643 x
= compile_pattern_not(list
);
645 die("--not followed by non pattern expression");
646 return grep_not_expr(x
);
648 return compile_pattern_atom(list
);
652 static struct grep_expr
*compile_pattern_and(struct grep_pat
**list
)
655 struct grep_expr
*x
, *y
;
657 x
= compile_pattern_not(list
);
659 if (p
&& p
->token
== GREP_AND
) {
661 die("--and not preceded by pattern expression");
663 die("--and not followed by pattern expression");
665 y
= compile_pattern_and(list
);
667 die("--and not followed by pattern expression");
668 return grep_and_expr(x
, y
);
673 static struct grep_expr
*compile_pattern_or(struct grep_pat
**list
)
676 struct grep_expr
*x
, *y
;
678 x
= compile_pattern_and(list
);
680 if (x
&& p
&& p
->token
!= GREP_CLOSE_PAREN
) {
681 y
= compile_pattern_or(list
);
683 die("not a pattern expression %s", p
->pattern
);
684 return grep_or_expr(x
, y
);
689 static struct grep_expr
*compile_pattern_expr(struct grep_pat
**list
)
691 return compile_pattern_or(list
);
694 static struct grep_expr
*grep_true_expr(void)
696 struct grep_expr
*z
= xcalloc(1, sizeof(*z
));
697 z
->node
= GREP_NODE_TRUE
;
701 static struct grep_expr
*prep_header_patterns(struct grep_opt
*opt
)
704 struct grep_expr
*header_expr
;
705 struct grep_expr
*(header_group
[GREP_HEADER_FIELD_MAX
]);
706 enum grep_header_field fld
;
708 if (!opt
->header_list
)
711 for (p
= opt
->header_list
; p
; p
= p
->next
) {
712 if (p
->token
!= GREP_PATTERN_HEAD
)
713 BUG("a non-header pattern in grep header list.");
714 if (p
->field
< GREP_HEADER_FIELD_MIN
||
715 GREP_HEADER_FIELD_MAX
<= p
->field
)
716 BUG("unknown header field %d", p
->field
);
717 compile_regexp(p
, opt
);
720 for (fld
= 0; fld
< GREP_HEADER_FIELD_MAX
; fld
++)
721 header_group
[fld
] = NULL
;
723 for (p
= opt
->header_list
; p
; p
= p
->next
) {
725 struct grep_pat
*pp
= p
;
727 h
= compile_pattern_atom(&pp
);
728 if (!h
|| pp
!= p
->next
)
729 BUG("malformed header expr");
730 if (!header_group
[p
->field
]) {
731 header_group
[p
->field
] = h
;
734 header_group
[p
->field
] = grep_or_expr(h
, header_group
[p
->field
]);
739 for (fld
= 0; fld
< GREP_HEADER_FIELD_MAX
; fld
++) {
740 if (!header_group
[fld
])
743 header_expr
= grep_true_expr();
744 header_expr
= grep_or_expr(header_group
[fld
], header_expr
);
749 static struct grep_expr
*grep_splice_or(struct grep_expr
*x
, struct grep_expr
*y
)
751 struct grep_expr
*z
= x
;
754 assert(x
->node
== GREP_NODE_OR
);
755 if (x
->u
.binary
.right
&&
756 x
->u
.binary
.right
->node
== GREP_NODE_TRUE
) {
757 x
->u
.binary
.right
= y
;
760 x
= x
->u
.binary
.right
;
765 void compile_grep_patterns(struct grep_opt
*opt
)
768 struct grep_expr
*header_expr
= prep_header_patterns(opt
);
771 for (p
= opt
->pattern_list
; p
; p
= p
->next
) {
773 case GREP_PATTERN
: /* atom */
774 case GREP_PATTERN_HEAD
:
775 case GREP_PATTERN_BODY
:
776 compile_regexp(p
, opt
);
784 if (opt
->all_match
|| opt
->no_body_match
|| header_expr
)
789 p
= opt
->pattern_list
;
791 opt
->pattern_expression
= compile_pattern_expr(&p
);
793 die("incomplete pattern expression: %s", p
->pattern
);
795 if (opt
->no_body_match
&& opt
->pattern_expression
)
796 opt
->pattern_expression
= grep_not_expr(opt
->pattern_expression
);
801 if (!opt
->pattern_expression
)
802 opt
->pattern_expression
= header_expr
;
803 else if (opt
->all_match
)
804 opt
->pattern_expression
= grep_splice_or(header_expr
,
805 opt
->pattern_expression
);
807 opt
->pattern_expression
= grep_or_expr(opt
->pattern_expression
,
812 static void free_pattern_expr(struct grep_expr
*x
)
819 free_pattern_expr(x
->u
.unary
);
823 free_pattern_expr(x
->u
.binary
.left
);
824 free_pattern_expr(x
->u
.binary
.right
);
830 static void free_grep_pat(struct grep_pat
*pattern
)
832 struct grep_pat
*p
, *n
;
834 for (p
= pattern
; p
; p
= n
) {
837 case GREP_PATTERN
: /* atom */
838 case GREP_PATTERN_HEAD
:
839 case GREP_PATTERN_BODY
:
840 if (p
->pcre2_pattern
)
841 free_pcre2_pattern(p
);
853 void free_grep_patterns(struct grep_opt
*opt
)
855 free_grep_pat(opt
->pattern_list
);
856 free_grep_pat(opt
->header_list
);
858 if (opt
->pattern_expression
)
859 free_pattern_expr(opt
->pattern_expression
);
862 static const char *end_of_line(const char *cp
, unsigned long *left
)
864 unsigned long l
= *left
;
865 while (l
&& *cp
!= '\n') {
873 static int word_char(char ch
)
875 return isalnum(ch
) || ch
== '_';
878 static void output_color(struct grep_opt
*opt
, const void *data
, size_t size
,
881 if (want_color(opt
->color
) && color
&& color
[0]) {
882 opt
->output(opt
, color
, strlen(color
));
883 opt
->output(opt
, data
, size
);
884 opt
->output(opt
, GIT_COLOR_RESET
, strlen(GIT_COLOR_RESET
));
886 opt
->output(opt
, data
, size
);
889 static void output_sep(struct grep_opt
*opt
, char sign
)
891 if (opt
->null_following_name
)
892 opt
->output(opt
, "\0", 1);
894 output_color(opt
, &sign
, 1, opt
->colors
[GREP_COLOR_SEP
]);
897 static void show_name(struct grep_opt
*opt
, const char *name
)
899 output_color(opt
, name
, strlen(name
), opt
->colors
[GREP_COLOR_FILENAME
]);
900 opt
->output(opt
, opt
->null_following_name
? "\0" : "\n", 1);
903 static int patmatch(struct grep_pat
*p
,
904 const char *line
, const char *eol
,
905 regmatch_t
*match
, int eflags
)
909 if (p
->pcre2_pattern
)
910 hit
= !pcre2match(p
, line
, eol
, match
, eflags
);
912 hit
= !regexec_buf(&p
->regexp
, line
, eol
- line
, 1, match
,
918 static void strip_timestamp(const char *bol
, const char **eol_p
)
920 const char *eol
= *eol_p
;
922 while (bol
< --eol
) {
935 { "committer ", 10 },
939 static int headerless_match_one_pattern(struct grep_pat
*p
,
940 const char *bol
, const char *eol
,
941 enum grep_context ctx
,
942 regmatch_t
*pmatch
, int eflags
)
945 const char *start
= bol
;
947 if ((p
->token
!= GREP_PATTERN
) &&
948 ((p
->token
== GREP_PATTERN_HEAD
) != (ctx
== GREP_CONTEXT_HEAD
)))
952 hit
= patmatch(p
, bol
, eol
, pmatch
, eflags
);
954 if (hit
&& p
->word_regexp
) {
955 if ((pmatch
[0].rm_so
< 0) ||
956 (eol
- bol
) < pmatch
[0].rm_so
||
957 (pmatch
[0].rm_eo
< 0) ||
958 (eol
- bol
) < pmatch
[0].rm_eo
)
959 die("regexp returned nonsense");
961 /* Match beginning must be either beginning of the
962 * line, or at word boundary (i.e. the last char must
963 * not be a word char). Similarly, match end must be
964 * either end of the line, or at word boundary
965 * (i.e. the next char must not be a word char).
967 if ( ((pmatch
[0].rm_so
== 0) ||
968 !word_char(bol
[pmatch
[0].rm_so
-1])) &&
969 ((pmatch
[0].rm_eo
== (eol
-bol
)) ||
970 !word_char(bol
[pmatch
[0].rm_eo
])) )
975 /* Words consist of at least one character. */
976 if (pmatch
->rm_so
== pmatch
->rm_eo
)
979 if (!hit
&& pmatch
[0].rm_so
+ bol
+ 1 < eol
) {
980 /* There could be more than one match on the
981 * line, and the first match might not be
982 * strict word match. But later ones could be!
983 * Forward to the next possible start, i.e. the
984 * next position following a non-word char.
986 bol
= pmatch
[0].rm_so
+ bol
+ 1;
987 while (word_char(bol
[-1]) && bol
< eol
)
989 eflags
|= REG_NOTBOL
;
995 pmatch
[0].rm_so
+= bol
- start
;
996 pmatch
[0].rm_eo
+= bol
- start
;
1001 static int match_one_pattern(struct grep_pat
*p
,
1002 const char *bol
, const char *eol
,
1003 enum grep_context ctx
, regmatch_t
*pmatch
,
1009 if (p
->token
== GREP_PATTERN_HEAD
) {
1010 assert(p
->field
< ARRAY_SIZE(header_field
));
1011 field
= header_field
[p
->field
].field
;
1012 len
= header_field
[p
->field
].len
;
1013 if (strncmp(bol
, field
, len
))
1018 case GREP_HEADER_AUTHOR
:
1019 case GREP_HEADER_COMMITTER
:
1020 strip_timestamp(bol
, &eol
);
1027 return headerless_match_one_pattern(p
, bol
, eol
, ctx
, pmatch
, eflags
);
1031 static int match_expr_eval(struct grep_opt
*opt
, struct grep_expr
*x
,
1032 const char *bol
, const char *eol
,
1033 enum grep_context ctx
, ssize_t
*col
,
1034 ssize_t
*icol
, int collect_hits
)
1039 case GREP_NODE_TRUE
:
1042 case GREP_NODE_ATOM
:
1045 h
= match_one_pattern(x
->u
.atom
, bol
, eol
, ctx
,
1047 if (h
&& (*col
< 0 || tmp
.rm_so
< *col
))
1050 if (x
->u
.atom
->token
== GREP_PATTERN_BODY
)
1055 * Upon visiting a GREP_NODE_NOT, col and icol become swapped.
1057 h
= !match_expr_eval(opt
, x
->u
.unary
, bol
, eol
, ctx
, icol
, col
,
1061 h
= match_expr_eval(opt
, x
->u
.binary
.left
, bol
, eol
, ctx
, col
,
1063 if (h
|| opt
->columnnum
) {
1065 * Don't short-circuit AND when given --column, since a
1066 * NOT earlier in the tree may turn this into an OR. In
1067 * this case, see the below comment.
1069 h
&= match_expr_eval(opt
, x
->u
.binary
.right
, bol
, eol
,
1074 if (!(collect_hits
|| opt
->columnnum
)) {
1076 * Don't short-circuit OR when given --column (or
1077 * collecting hits) to ensure we don't skip a later
1078 * child that would produce an earlier match.
1080 return (match_expr_eval(opt
, x
->u
.binary
.left
, bol
, eol
,
1081 ctx
, col
, icol
, 0) ||
1082 match_expr_eval(opt
, x
->u
.binary
.right
, bol
,
1083 eol
, ctx
, col
, icol
, 0));
1085 h
= match_expr_eval(opt
, x
->u
.binary
.left
, bol
, eol
, ctx
, col
,
1088 x
->u
.binary
.left
->hit
|= h
;
1089 h
|= match_expr_eval(opt
, x
->u
.binary
.right
, bol
, eol
, ctx
, col
,
1090 icol
, collect_hits
);
1093 die("Unexpected node type (internal error) %d", x
->node
);
1100 static int match_expr(struct grep_opt
*opt
,
1101 const char *bol
, const char *eol
,
1102 enum grep_context ctx
, ssize_t
*col
,
1103 ssize_t
*icol
, int collect_hits
)
1105 struct grep_expr
*x
= opt
->pattern_expression
;
1106 return match_expr_eval(opt
, x
, bol
, eol
, ctx
, col
, icol
, collect_hits
);
1109 static int match_line(struct grep_opt
*opt
,
1110 const char *bol
, const char *eol
,
1111 ssize_t
*col
, ssize_t
*icol
,
1112 enum grep_context ctx
, int collect_hits
)
1117 if (opt
->pattern_expression
)
1118 return match_expr(opt
, bol
, eol
, ctx
, col
, icol
,
1121 /* we do not call with collect_hits without being extended */
1122 for (p
= opt
->pattern_list
; p
; p
= p
->next
) {
1124 if (match_one_pattern(p
, bol
, eol
, ctx
, &tmp
, 0)) {
1126 if (!opt
->columnnum
) {
1128 * Without --column, any single match on a line
1129 * is enough to know that it needs to be
1130 * printed. With --column, scan _all_ patterns
1131 * to find the earliest.
1135 if (*col
< 0 || tmp
.rm_so
< *col
)
1142 static int match_next_pattern(struct grep_pat
*p
,
1143 const char *bol
, const char *eol
,
1144 enum grep_context ctx
,
1145 regmatch_t
*pmatch
, int eflags
)
1149 if (!headerless_match_one_pattern(p
, bol
, eol
, ctx
, &match
, eflags
))
1151 if (match
.rm_so
< 0 || match
.rm_eo
< 0)
1153 if (pmatch
->rm_so
>= 0 && pmatch
->rm_eo
>= 0) {
1154 if (match
.rm_so
> pmatch
->rm_so
)
1156 if (match
.rm_so
== pmatch
->rm_so
&& match
.rm_eo
< pmatch
->rm_eo
)
1159 pmatch
->rm_so
= match
.rm_so
;
1160 pmatch
->rm_eo
= match
.rm_eo
;
1164 int grep_next_match(struct grep_opt
*opt
,
1165 const char *bol
, const char *eol
,
1166 enum grep_context ctx
, regmatch_t
*pmatch
,
1167 enum grep_header_field field
, int eflags
)
1172 pmatch
->rm_so
= pmatch
->rm_eo
= -1;
1174 for (p
= ((ctx
== GREP_CONTEXT_HEAD
)
1175 ? opt
->header_list
: opt
->pattern_list
);
1178 case GREP_PATTERN_HEAD
:
1179 if ((field
!= GREP_HEADER_FIELD_MAX
) &&
1180 (p
->field
!= field
))
1183 case GREP_PATTERN
: /* atom */
1184 case GREP_PATTERN_BODY
:
1185 hit
|= match_next_pattern(p
, bol
, eol
, ctx
,
1196 static void show_line_header(struct grep_opt
*opt
, const char *name
,
1197 unsigned lno
, ssize_t cno
, char sign
)
1199 if (opt
->heading
&& opt
->last_shown
== 0) {
1200 output_color(opt
, name
, strlen(name
), opt
->colors
[GREP_COLOR_FILENAME
]);
1201 opt
->output(opt
, "\n", 1);
1203 opt
->last_shown
= lno
;
1205 if (!opt
->heading
&& opt
->pathname
) {
1206 output_color(opt
, name
, strlen(name
), opt
->colors
[GREP_COLOR_FILENAME
]);
1207 output_sep(opt
, sign
);
1211 xsnprintf(buf
, sizeof(buf
), "%d", lno
);
1212 output_color(opt
, buf
, strlen(buf
), opt
->colors
[GREP_COLOR_LINENO
]);
1213 output_sep(opt
, sign
);
1216 * Treat 'cno' as the 1-indexed offset from the start of a non-context
1217 * line to its first match. Otherwise, 'cno' is 0 indicating that we are
1218 * being called with a context line.
1220 if (opt
->columnnum
&& cno
) {
1222 xsnprintf(buf
, sizeof(buf
), "%"PRIuMAX
, (uintmax_t)cno
);
1223 output_color(opt
, buf
, strlen(buf
), opt
->colors
[GREP_COLOR_COLUMNNO
]);
1224 output_sep(opt
, sign
);
1228 static void show_line(struct grep_opt
*opt
,
1229 const char *bol
, const char *eol
,
1230 const char *name
, unsigned lno
, ssize_t cno
, char sign
)
1232 int rest
= eol
- bol
;
1233 const char *match_color
= NULL
;
1234 const char *line_color
= NULL
;
1236 if (opt
->file_break
&& opt
->last_shown
== 0) {
1237 if (opt
->show_hunk_mark
)
1238 opt
->output(opt
, "\n", 1);
1239 } else if (opt
->pre_context
|| opt
->post_context
|| opt
->funcbody
) {
1240 if (opt
->last_shown
== 0) {
1241 if (opt
->show_hunk_mark
) {
1242 output_color(opt
, "--", 2, opt
->colors
[GREP_COLOR_SEP
]);
1243 opt
->output(opt
, "\n", 1);
1245 } else if (lno
> opt
->last_shown
+ 1) {
1246 output_color(opt
, "--", 2, opt
->colors
[GREP_COLOR_SEP
]);
1247 opt
->output(opt
, "\n", 1);
1250 if (!opt
->only_matching
) {
1252 * In case the line we're being called with contains more than
1253 * one match, leave printing each header to the loop below.
1255 show_line_header(opt
, name
, lno
, cno
, sign
);
1257 if (opt
->color
|| opt
->only_matching
) {
1259 enum grep_context ctx
= GREP_CONTEXT_BODY
;
1264 match_color
= opt
->colors
[GREP_COLOR_MATCH_SELECTED
];
1266 match_color
= opt
->colors
[GREP_COLOR_MATCH_CONTEXT
];
1268 line_color
= opt
->colors
[GREP_COLOR_SELECTED
];
1269 else if (sign
== '-')
1270 line_color
= opt
->colors
[GREP_COLOR_CONTEXT
];
1271 else if (sign
== '=')
1272 line_color
= opt
->colors
[GREP_COLOR_FUNCTION
];
1274 while (grep_next_match(opt
, bol
, eol
, ctx
, &match
,
1275 GREP_HEADER_FIELD_MAX
, eflags
)) {
1276 if (match
.rm_so
== match
.rm_eo
)
1279 if (opt
->only_matching
)
1280 show_line_header(opt
, name
, lno
, cno
, sign
);
1282 output_color(opt
, bol
, match
.rm_so
, line_color
);
1283 output_color(opt
, bol
+ match
.rm_so
,
1284 match
.rm_eo
- match
.rm_so
, match_color
);
1285 if (opt
->only_matching
)
1286 opt
->output(opt
, "\n", 1);
1289 rest
-= match
.rm_eo
;
1290 eflags
= REG_NOTBOL
;
1293 if (!opt
->only_matching
) {
1294 output_color(opt
, bol
, rest
, line_color
);
1295 opt
->output(opt
, "\n", 1);
1302 * This lock protects access to the gitattributes machinery, which is
1305 pthread_mutex_t grep_attr_mutex
;
1307 static inline void grep_attr_lock(void)
1310 pthread_mutex_lock(&grep_attr_mutex
);
1313 static inline void grep_attr_unlock(void)
1316 pthread_mutex_unlock(&grep_attr_mutex
);
1319 static int match_funcname(struct grep_opt
*opt
, struct grep_source
*gs
,
1320 const char *bol
, const char *eol
)
1322 xdemitconf_t
*xecfg
= opt
->priv
;
1323 if (xecfg
&& !xecfg
->find_func
) {
1324 grep_source_load_driver(gs
, opt
->repo
->index
);
1325 if (gs
->driver
->funcname
.pattern
) {
1326 const struct userdiff_funcname
*pe
= &gs
->driver
->funcname
;
1327 xdiff_set_find_func(xecfg
, pe
->pattern
, pe
->cflags
);
1329 xecfg
= opt
->priv
= NULL
;
1335 return xecfg
->find_func(bol
, eol
- bol
, buf
, 1,
1336 xecfg
->find_func_priv
) >= 0;
1341 if (isalpha(*bol
) || *bol
== '_' || *bol
== '$')
1346 static void show_funcname_line(struct grep_opt
*opt
, struct grep_source
*gs
,
1347 const char *bol
, unsigned lno
)
1349 while (bol
> gs
->buf
) {
1350 const char *eol
= --bol
;
1352 while (bol
> gs
->buf
&& bol
[-1] != '\n')
1356 if (lno
<= opt
->last_shown
)
1359 if (match_funcname(opt
, gs
, bol
, eol
)) {
1360 show_line(opt
, bol
, eol
, gs
->name
, lno
, 0, '=');
1366 static int is_empty_line(const char *bol
, const char *eol
);
1368 static void show_pre_context(struct grep_opt
*opt
, struct grep_source
*gs
,
1369 const char *bol
, const char *end
, unsigned lno
)
1371 unsigned cur
= lno
, from
= 1, funcname_lno
= 0, orig_from
;
1372 int funcname_needed
= !!opt
->funcname
, comment_needed
= 0;
1374 if (opt
->pre_context
< lno
)
1375 from
= lno
- opt
->pre_context
;
1376 if (from
<= opt
->last_shown
)
1377 from
= opt
->last_shown
+ 1;
1379 if (opt
->funcbody
) {
1380 if (match_funcname(opt
, gs
, bol
, end
))
1383 funcname_needed
= 1;
1384 from
= opt
->last_shown
+ 1;
1388 while (bol
> gs
->buf
&& cur
> from
) {
1389 const char *next_bol
= bol
;
1390 const char *eol
= --bol
;
1392 while (bol
> gs
->buf
&& bol
[-1] != '\n')
1395 if (comment_needed
&& (is_empty_line(bol
, eol
) ||
1396 match_funcname(opt
, gs
, bol
, eol
))) {
1405 if (funcname_needed
&& match_funcname(opt
, gs
, bol
, eol
)) {
1407 funcname_needed
= 0;
1415 /* We need to look even further back to find a function signature. */
1416 if (opt
->funcname
&& funcname_needed
)
1417 show_funcname_line(opt
, gs
, bol
, cur
);
1421 const char *eol
= bol
, sign
= (cur
== funcname_lno
) ? '=' : '-';
1423 while (*eol
!= '\n')
1425 show_line(opt
, bol
, eol
, gs
->name
, cur
, 0, sign
);
1431 static int should_lookahead(struct grep_opt
*opt
)
1435 if (opt
->pattern_expression
)
1436 return 0; /* punt for too complex stuff */
1439 for (p
= opt
->pattern_list
; p
; p
= p
->next
) {
1440 if (p
->token
!= GREP_PATTERN
)
1441 return 0; /* punt for "header only" and stuff */
1446 static int look_ahead(struct grep_opt
*opt
,
1447 unsigned long *left_p
,
1451 unsigned lno
= *lno_p
;
1452 const char *bol
= *bol_p
;
1454 const char *sp
, *last_bol
;
1455 regoff_t earliest
= -1;
1457 for (p
= opt
->pattern_list
; p
; p
= p
->next
) {
1461 hit
= patmatch(p
, bol
, bol
+ *left_p
, &m
, 0);
1462 if (!hit
|| m
.rm_so
< 0 || m
.rm_eo
< 0)
1464 if (earliest
< 0 || m
.rm_so
< earliest
)
1469 *bol_p
= bol
+ *left_p
;
1473 for (sp
= bol
+ earliest
; bol
< sp
&& sp
[-1] != '\n'; sp
--)
1474 ; /* find the beginning of the line */
1477 for (sp
= bol
; sp
< last_bol
; sp
++) {
1481 *left_p
-= last_bol
- bol
;
1487 static int fill_textconv_grep(struct repository
*r
,
1488 struct userdiff_driver
*driver
,
1489 struct grep_source
*gs
)
1491 struct diff_filespec
*df
;
1495 if (!driver
|| !driver
->textconv
)
1496 return grep_source_load(gs
);
1499 * The textconv interface is intimately tied to diff_filespecs, so we
1500 * have to pretend to be one. If we could unify the grep_source
1501 * and diff_filespec structs, this mess could just go away.
1503 df
= alloc_filespec(gs
->path
);
1505 case GREP_SOURCE_OID
:
1506 fill_filespec(df
, gs
->identifier
, 1, 0100644);
1508 case GREP_SOURCE_FILE
:
1509 fill_filespec(df
, null_oid(), 0, 0100644);
1512 BUG("attempt to textconv something without a path?");
1516 * fill_textconv is not remotely thread-safe; it modifies the global
1517 * diff tempfile structure, writes to the_repo's odb and might
1518 * internally call thread-unsafe functions such as the
1519 * prepare_packed_git() lazy-initializator. Because of the last two, we
1520 * must ensure mutual exclusion between this call and the object reading
1521 * API, thus we use obj_read_lock() here.
1523 * TODO: allowing text conversion to run in parallel with object
1524 * reading operations might increase performance in the multithreaded
1525 * non-worktreee git-grep with --textconv.
1528 size
= fill_textconv(r
, driver
, df
, &buf
);
1533 * The normal fill_textconv usage by the diff machinery would just keep
1534 * the textconv'd buf separate from the diff_filespec. But much of the
1535 * grep code passes around a grep_source and assumes that its "buf"
1536 * pointer is the beginning of the thing we are searching. So let's
1537 * install our textconv'd version into the grep_source, taking care not
1538 * to leak any existing buffer.
1540 grep_source_clear_data(gs
);
1547 static int is_empty_line(const char *bol
, const char *eol
)
1549 while (bol
< eol
&& isspace(*bol
))
1554 static int grep_source_1(struct grep_opt
*opt
, struct grep_source
*gs
, int collect_hits
)
1557 const char *peek_bol
= NULL
;
1560 unsigned last_hit
= 0;
1561 int binary_match_only
= 0;
1563 int try_lookahead
= 0;
1564 int show_function
= 0;
1565 struct userdiff_driver
*textconv
= NULL
;
1566 enum grep_context ctx
= GREP_CONTEXT_HEAD
;
1569 if (!opt
->status_only
&& gs
->name
== NULL
)
1570 BUG("grep call which could print a name requires "
1571 "grep_source.name be non-NULL");
1574 opt
->output
= std_output
;
1576 if (opt
->pre_context
|| opt
->post_context
|| opt
->file_break
||
1578 /* Show hunk marks, except for the first file. */
1579 if (opt
->last_shown
)
1580 opt
->show_hunk_mark
= 1;
1582 * If we're using threads then we can't easily identify
1583 * the first file. Always put hunk marks in that case
1584 * and skip the very first one later in work_done().
1586 if (opt
->output
!= std_output
)
1587 opt
->show_hunk_mark
= 1;
1589 opt
->last_shown
= 0;
1591 if (opt
->allow_textconv
) {
1592 grep_source_load_driver(gs
, opt
->repo
->index
);
1594 * We might set up the shared textconv cache data here, which
1595 * is not thread-safe. Also, get_oid_with_context() and
1596 * parse_object() might be internally called. As they are not
1597 * currently thread-safe and might be racy with object reading,
1598 * obj_read_lock() must be called.
1602 textconv
= userdiff_get_textconv(opt
->repo
, gs
->driver
);
1608 * We know the result of a textconv is text, so we only have to care
1609 * about binary handling if we are not using it.
1612 switch (opt
->binary
) {
1613 case GREP_BINARY_DEFAULT
:
1614 if (grep_source_is_binary(gs
, opt
->repo
->index
))
1615 binary_match_only
= 1;
1617 case GREP_BINARY_NOMATCH
:
1618 if (grep_source_is_binary(gs
, opt
->repo
->index
))
1619 return 0; /* Assume unmatch */
1621 case GREP_BINARY_TEXT
:
1624 BUG("unknown binary handling mode");
1628 memset(&xecfg
, 0, sizeof(xecfg
));
1631 try_lookahead
= should_lookahead(opt
);
1633 if (fill_textconv_grep(opt
->repo
, textconv
, gs
) < 0)
1642 ssize_t col
= -1, icol
= -1;
1645 * look_ahead() skips quickly to the line that possibly
1646 * has the next hit; don't call it if we need to do
1647 * something more than just skipping the current line
1648 * in response to an unmatch for the current line. E.g.
1649 * inside a post-context window, we will show the current
1650 * line as a context around the previous hit when it
1655 && (show_function
||
1656 lno
<= last_hit
+ opt
->post_context
))
1657 && look_ahead(opt
, &left
, &lno
, &bol
))
1659 eol
= end_of_line(bol
, &left
);
1661 if ((ctx
== GREP_CONTEXT_HEAD
) && (eol
== bol
))
1662 ctx
= GREP_CONTEXT_BODY
;
1664 hit
= match_line(opt
, bol
, eol
, &col
, &icol
, ctx
, collect_hits
);
1669 /* "grep -v -e foo -e bla" should list lines
1670 * that do not have either, so inversion should
1675 if (opt
->unmatch_name_only
) {
1680 if (hit
&& (opt
->max_count
< 0 || count
< opt
->max_count
)) {
1682 if (opt
->status_only
)
1684 if (opt
->name_only
) {
1685 show_name(opt
, gs
->name
);
1690 if (binary_match_only
) {
1691 opt
->output(opt
, "Binary file ", 12);
1692 output_color(opt
, gs
->name
, strlen(gs
->name
),
1693 opt
->colors
[GREP_COLOR_FILENAME
]);
1694 opt
->output(opt
, " matches\n", 9);
1697 /* Hit at this line. If we haven't shown the
1698 * pre-context lines, we would need to show them.
1700 if (opt
->pre_context
|| opt
->funcbody
)
1701 show_pre_context(opt
, gs
, bol
, eol
, lno
);
1702 else if (opt
->funcname
)
1703 show_funcname_line(opt
, gs
, bol
, lno
);
1704 cno
= opt
->invert
? icol
: col
;
1707 * A negative cno indicates that there was no
1708 * match on the line. We are thus inverted and
1709 * being asked to show all lines that _don't_
1710 * match a given expression. Therefore, set cno
1711 * to 0 to suggest the whole line matches.
1715 show_line(opt
, bol
, eol
, gs
->name
, lno
, cno
+ 1, ':');
1721 if (show_function
&& (!peek_bol
|| peek_bol
< bol
)) {
1722 unsigned long peek_left
= left
;
1723 const char *peek_eol
= eol
;
1726 * Trailing empty lines are not interesting.
1727 * Peek past them to see if they belong to the
1728 * body of the current function.
1731 while (is_empty_line(peek_bol
, peek_eol
)) {
1732 peek_bol
= peek_eol
+ 1;
1733 peek_eol
= end_of_line(peek_bol
, &peek_left
);
1736 if (match_funcname(opt
, gs
, peek_bol
, peek_eol
))
1739 if (show_function
||
1740 (last_hit
&& lno
<= last_hit
+ opt
->post_context
)) {
1741 /* If the last hit is within the post context,
1742 * we need to show this line.
1744 show_line(opt
, bol
, eol
, gs
->name
, lno
, col
+ 1, '-');
1758 if (opt
->status_only
)
1759 return opt
->unmatch_name_only
;
1760 if (opt
->unmatch_name_only
) {
1761 /* We did not see any hit, so we want to show this */
1762 show_name(opt
, gs
->name
);
1766 xdiff_clear_find_func(&xecfg
);
1770 * The real "grep -c foo *.c" gives many "bar.c:0" lines,
1771 * which feels mostly useless but sometimes useful. Maybe
1772 * make it another option? For now suppress them.
1774 if (opt
->count
&& count
) {
1776 if (opt
->pathname
) {
1777 output_color(opt
, gs
->name
, strlen(gs
->name
),
1778 opt
->colors
[GREP_COLOR_FILENAME
]);
1779 output_sep(opt
, ':');
1781 xsnprintf(buf
, sizeof(buf
), "%u\n", count
);
1782 opt
->output(opt
, buf
, strlen(buf
));
1788 static void clr_hit_marker(struct grep_expr
*x
)
1790 /* All-hit markers are meaningful only at the very top level
1795 if (x
->node
!= GREP_NODE_OR
)
1797 x
->u
.binary
.left
->hit
= 0;
1798 x
= x
->u
.binary
.right
;
1802 static int chk_hit_marker(struct grep_expr
*x
)
1804 /* Top level nodes have hit markers. See if they all are hits */
1806 if (x
->node
!= GREP_NODE_OR
)
1808 if (!x
->u
.binary
.left
->hit
)
1810 x
= x
->u
.binary
.right
;
1814 int grep_source(struct grep_opt
*opt
, struct grep_source
*gs
)
1817 * we do not have to do the two-pass grep when we do not check
1818 * buffer-wide "all-match".
1820 if (!opt
->all_match
&& !opt
->no_body_match
)
1821 return grep_source_1(opt
, gs
, 0);
1823 /* Otherwise the toplevel "or" terms hit a bit differently.
1824 * We first clear hit markers from them.
1826 clr_hit_marker(opt
->pattern_expression
);
1828 grep_source_1(opt
, gs
, 1);
1830 if (opt
->all_match
&& !chk_hit_marker(opt
->pattern_expression
))
1832 if (opt
->no_body_match
&& opt
->body_hit
)
1835 return grep_source_1(opt
, gs
, 0);
1838 static void grep_source_init_buf(struct grep_source
*gs
,
1842 gs
->type
= GREP_SOURCE_BUF
;
1848 gs
->identifier
= NULL
;
1851 int grep_buffer(struct grep_opt
*opt
, const char *buf
, unsigned long size
)
1853 struct grep_source gs
;
1856 grep_source_init_buf(&gs
, buf
, size
);
1858 r
= grep_source(opt
, &gs
);
1860 grep_source_clear(&gs
);
1864 void grep_source_init_file(struct grep_source
*gs
, const char *name
,
1867 gs
->type
= GREP_SOURCE_FILE
;
1868 gs
->name
= xstrdup_or_null(name
);
1869 gs
->path
= xstrdup_or_null(path
);
1873 gs
->identifier
= xstrdup(path
);
1876 void grep_source_init_oid(struct grep_source
*gs
, const char *name
,
1877 const char *path
, const struct object_id
*oid
,
1878 struct repository
*repo
)
1880 gs
->type
= GREP_SOURCE_OID
;
1881 gs
->name
= xstrdup_or_null(name
);
1882 gs
->path
= xstrdup_or_null(path
);
1886 gs
->identifier
= oiddup(oid
);
1890 void grep_source_clear(struct grep_source
*gs
)
1892 FREE_AND_NULL(gs
->name
);
1893 FREE_AND_NULL(gs
->path
);
1894 FREE_AND_NULL(gs
->identifier
);
1895 grep_source_clear_data(gs
);
1898 void grep_source_clear_data(struct grep_source
*gs
)
1901 case GREP_SOURCE_FILE
:
1902 case GREP_SOURCE_OID
:
1903 /* these types own the buffer */
1904 free((char *)gs
->buf
);
1908 case GREP_SOURCE_BUF
:
1909 /* leave user-provided buf intact */
1914 static int grep_source_load_oid(struct grep_source
*gs
)
1916 enum object_type type
;
1918 gs
->buf
= repo_read_object_file(gs
->repo
, gs
->identifier
, &type
,
1921 return error(_("'%s': unable to read %s"),
1923 oid_to_hex(gs
->identifier
));
1927 static int grep_source_load_file(struct grep_source
*gs
)
1929 const char *filename
= gs
->identifier
;
1935 if (lstat(filename
, &st
) < 0) {
1937 if (errno
!= ENOENT
)
1938 error_errno(_("failed to stat '%s'"), filename
);
1941 if (!S_ISREG(st
.st_mode
))
1943 size
= xsize_t(st
.st_size
);
1944 i
= open(filename
, O_RDONLY
);
1947 data
= xmallocz(size
);
1948 if (st
.st_size
!= read_in_full(i
, data
, size
)) {
1949 error_errno(_("'%s': short read"), filename
);
1961 static int grep_source_load(struct grep_source
*gs
)
1967 case GREP_SOURCE_FILE
:
1968 return grep_source_load_file(gs
);
1969 case GREP_SOURCE_OID
:
1970 return grep_source_load_oid(gs
);
1971 case GREP_SOURCE_BUF
:
1972 return gs
->buf
? 0 : -1;
1974 BUG("invalid grep_source type to load");
1977 void grep_source_load_driver(struct grep_source
*gs
,
1978 struct index_state
*istate
)
1985 gs
->driver
= userdiff_find_by_path(istate
, gs
->path
);
1987 gs
->driver
= userdiff_find_by_name("default");
1991 static int grep_source_is_binary(struct grep_source
*gs
,
1992 struct index_state
*istate
)
1994 grep_source_load_driver(gs
, istate
);
1995 if (gs
->driver
->binary
!= -1)
1996 return gs
->driver
->binary
;
1998 if (!grep_source_load(gs
))
1999 return buffer_is_binary(gs
->buf
, gs
->size
);