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Commit | Line | Data |
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83b5d2f5 | 1 | #include "cache.h" |
83b5d2f5 | 2 | #include "grep.h" |
60ecac98 | 3 | #include "userdiff.h" |
6bfce93e | 4 | #include "xdiff-interface.h" |
335ec3bf JK |
5 | #include "diff.h" |
6 | #include "diffcore.h" | |
5c1ebcca | 7 | #include "commit.h" |
793dc676 | 8 | #include "quote.h" |
83b5d2f5 | 9 | |
07a7d656 JH |
10 | static int grep_source_load(struct grep_source *gs); |
11 | static int grep_source_is_binary(struct grep_source *gs); | |
12 | ||
7687a054 JH |
13 | static struct grep_opt grep_defaults; |
14 | ||
15 | /* | |
16 | * Initialize the grep_defaults template with hardcoded defaults. | |
17 | * We could let the compiler do this, but without C99 initializers | |
18 | * the code gets unwieldy and unreadable, so... | |
19 | */ | |
20 | void init_grep_defaults(void) | |
21 | { | |
22 | struct grep_opt *opt = &grep_defaults; | |
918d4e1c JH |
23 | static int run_once; |
24 | ||
25 | if (run_once) | |
26 | return; | |
27 | run_once++; | |
7687a054 JH |
28 | |
29 | memset(opt, 0, sizeof(*opt)); | |
30 | opt->relative = 1; | |
31 | opt->pathname = 1; | |
32 | opt->regflags = REG_NEWLINE; | |
33 | opt->max_depth = -1; | |
34 | opt->pattern_type_option = GREP_PATTERN_TYPE_UNSPECIFIED; | |
35 | opt->extended_regexp_option = 0; | |
7ce4fb94 JK |
36 | color_set(opt->color_context, ""); |
37 | color_set(opt->color_filename, ""); | |
38 | color_set(opt->color_function, ""); | |
39 | color_set(opt->color_lineno, ""); | |
40 | color_set(opt->color_match_context, GIT_COLOR_BOLD_RED); | |
41 | color_set(opt->color_match_selected, GIT_COLOR_BOLD_RED); | |
42 | color_set(opt->color_selected, ""); | |
43 | color_set(opt->color_sep, GIT_COLOR_CYAN); | |
7687a054 JH |
44 | opt->color = -1; |
45 | } | |
46 | ||
47 | static int parse_pattern_type_arg(const char *opt, const char *arg) | |
48 | { | |
49 | if (!strcmp(arg, "default")) | |
50 | return GREP_PATTERN_TYPE_UNSPECIFIED; | |
51 | else if (!strcmp(arg, "basic")) | |
52 | return GREP_PATTERN_TYPE_BRE; | |
53 | else if (!strcmp(arg, "extended")) | |
54 | return GREP_PATTERN_TYPE_ERE; | |
55 | else if (!strcmp(arg, "fixed")) | |
56 | return GREP_PATTERN_TYPE_FIXED; | |
57 | else if (!strcmp(arg, "perl")) | |
58 | return GREP_PATTERN_TYPE_PCRE; | |
59 | die("bad %s argument: %s", opt, arg); | |
60 | } | |
61 | ||
62 | /* | |
63 | * Read the configuration file once and store it in | |
64 | * the grep_defaults template. | |
65 | */ | |
66 | int grep_config(const char *var, const char *value, void *cb) | |
67 | { | |
68 | struct grep_opt *opt = &grep_defaults; | |
69 | char *color = NULL; | |
70 | ||
71 | if (userdiff_config(var, value) < 0) | |
72 | return -1; | |
73 | ||
74 | if (!strcmp(var, "grep.extendedregexp")) { | |
75 | if (git_config_bool(var, value)) | |
76 | opt->extended_regexp_option = 1; | |
77 | else | |
78 | opt->extended_regexp_option = 0; | |
79 | return 0; | |
80 | } | |
81 | ||
82 | if (!strcmp(var, "grep.patterntype")) { | |
83 | opt->pattern_type_option = parse_pattern_type_arg(var, value); | |
84 | return 0; | |
85 | } | |
86 | ||
87 | if (!strcmp(var, "grep.linenumber")) { | |
88 | opt->linenum = git_config_bool(var, value); | |
89 | return 0; | |
90 | } | |
91 | ||
6453f7b3 AS |
92 | if (!strcmp(var, "grep.fullname")) { |
93 | opt->relative = !git_config_bool(var, value); | |
94 | return 0; | |
95 | } | |
96 | ||
7687a054 JH |
97 | if (!strcmp(var, "color.grep")) |
98 | opt->color = git_config_colorbool(var, value); | |
99 | else if (!strcmp(var, "color.grep.context")) | |
100 | color = opt->color_context; | |
101 | else if (!strcmp(var, "color.grep.filename")) | |
102 | color = opt->color_filename; | |
103 | else if (!strcmp(var, "color.grep.function")) | |
104 | color = opt->color_function; | |
105 | else if (!strcmp(var, "color.grep.linenumber")) | |
106 | color = opt->color_lineno; | |
79a77109 RS |
107 | else if (!strcmp(var, "color.grep.matchcontext")) |
108 | color = opt->color_match_context; | |
109 | else if (!strcmp(var, "color.grep.matchselected")) | |
110 | color = opt->color_match_selected; | |
7687a054 JH |
111 | else if (!strcmp(var, "color.grep.selected")) |
112 | color = opt->color_selected; | |
113 | else if (!strcmp(var, "color.grep.separator")) | |
114 | color = opt->color_sep; | |
79a77109 RS |
115 | else if (!strcmp(var, "color.grep.match")) { |
116 | int rc = 0; | |
117 | if (!value) | |
118 | return config_error_nonbool(var); | |
bf1f639e JH |
119 | rc |= color_parse(value, opt->color_match_context); |
120 | rc |= color_parse(value, opt->color_match_selected); | |
79a77109 RS |
121 | return rc; |
122 | } | |
7687a054 JH |
123 | |
124 | if (color) { | |
125 | if (!value) | |
126 | return config_error_nonbool(var); | |
f6c5a296 | 127 | return color_parse(value, color); |
7687a054 JH |
128 | } |
129 | return 0; | |
130 | } | |
131 | ||
132 | /* | |
133 | * Initialize one instance of grep_opt and copy the | |
134 | * default values from the template we read the configuration | |
135 | * information in an earlier call to git_config(grep_config). | |
136 | */ | |
137 | void grep_init(struct grep_opt *opt, const char *prefix) | |
138 | { | |
139 | struct grep_opt *def = &grep_defaults; | |
140 | ||
141 | memset(opt, 0, sizeof(*opt)); | |
142 | opt->prefix = prefix; | |
143 | opt->prefix_length = (prefix && *prefix) ? strlen(prefix) : 0; | |
144 | opt->pattern_tail = &opt->pattern_list; | |
145 | opt->header_tail = &opt->header_list; | |
146 | ||
147 | opt->color = def->color; | |
148 | opt->extended_regexp_option = def->extended_regexp_option; | |
149 | opt->pattern_type_option = def->pattern_type_option; | |
150 | opt->linenum = def->linenum; | |
151 | opt->max_depth = def->max_depth; | |
152 | opt->pathname = def->pathname; | |
153 | opt->regflags = def->regflags; | |
154 | opt->relative = def->relative; | |
155 | ||
7ce4fb94 JK |
156 | color_set(opt->color_context, def->color_context); |
157 | color_set(opt->color_filename, def->color_filename); | |
158 | color_set(opt->color_function, def->color_function); | |
159 | color_set(opt->color_lineno, def->color_lineno); | |
160 | color_set(opt->color_match_context, def->color_match_context); | |
161 | color_set(opt->color_match_selected, def->color_match_selected); | |
162 | color_set(opt->color_selected, def->color_selected); | |
163 | color_set(opt->color_sep, def->color_sep); | |
7687a054 | 164 | } |
07a7d656 | 165 | |
8465541e | 166 | static void grep_set_pattern_type_option(enum grep_pattern_type pattern_type, struct grep_opt *opt) |
c5c31d33 JH |
167 | { |
168 | switch (pattern_type) { | |
169 | case GREP_PATTERN_TYPE_UNSPECIFIED: | |
170 | /* fall through */ | |
171 | ||
172 | case GREP_PATTERN_TYPE_BRE: | |
173 | opt->fixed = 0; | |
174 | opt->pcre = 0; | |
175 | opt->regflags &= ~REG_EXTENDED; | |
176 | break; | |
177 | ||
178 | case GREP_PATTERN_TYPE_ERE: | |
179 | opt->fixed = 0; | |
180 | opt->pcre = 0; | |
181 | opt->regflags |= REG_EXTENDED; | |
182 | break; | |
183 | ||
184 | case GREP_PATTERN_TYPE_FIXED: | |
185 | opt->fixed = 1; | |
186 | opt->pcre = 0; | |
187 | opt->regflags &= ~REG_EXTENDED; | |
188 | break; | |
189 | ||
190 | case GREP_PATTERN_TYPE_PCRE: | |
191 | opt->fixed = 0; | |
192 | opt->pcre = 1; | |
193 | opt->regflags &= ~REG_EXTENDED; | |
194 | break; | |
195 | } | |
196 | } | |
197 | ||
8465541e JH |
198 | void grep_commit_pattern_type(enum grep_pattern_type pattern_type, struct grep_opt *opt) |
199 | { | |
200 | if (pattern_type != GREP_PATTERN_TYPE_UNSPECIFIED) | |
201 | grep_set_pattern_type_option(pattern_type, opt); | |
202 | else if (opt->pattern_type_option != GREP_PATTERN_TYPE_UNSPECIFIED) | |
203 | grep_set_pattern_type_option(opt->pattern_type_option, opt); | |
204 | else if (opt->extended_regexp_option) | |
205 | grep_set_pattern_type_option(GREP_PATTERN_TYPE_ERE, opt); | |
206 | } | |
207 | ||
fc456751 RS |
208 | static struct grep_pat *create_grep_pat(const char *pat, size_t patlen, |
209 | const char *origin, int no, | |
210 | enum grep_pat_token t, | |
211 | enum grep_header_field field) | |
a4d7d2c6 JH |
212 | { |
213 | struct grep_pat *p = xcalloc(1, sizeof(*p)); | |
526a858a | 214 | p->pattern = xmemdupz(pat, patlen); |
fc456751 RS |
215 | p->patternlen = patlen; |
216 | p->origin = origin; | |
217 | p->no = no; | |
218 | p->token = t; | |
a4d7d2c6 | 219 | p->field = field; |
fc456751 RS |
220 | return p; |
221 | } | |
222 | ||
2b3873ff RS |
223 | static void do_append_grep_pat(struct grep_pat ***tail, struct grep_pat *p) |
224 | { | |
225 | **tail = p; | |
226 | *tail = &p->next; | |
a4d7d2c6 | 227 | p->next = NULL; |
526a858a RS |
228 | |
229 | switch (p->token) { | |
230 | case GREP_PATTERN: /* atom */ | |
231 | case GREP_PATTERN_HEAD: | |
232 | case GREP_PATTERN_BODY: | |
233 | for (;;) { | |
234 | struct grep_pat *new_pat; | |
235 | size_t len = 0; | |
236 | char *cp = p->pattern + p->patternlen, *nl = NULL; | |
237 | while (++len <= p->patternlen) { | |
238 | if (*(--cp) == '\n') { | |
239 | nl = cp; | |
240 | break; | |
241 | } | |
242 | } | |
243 | if (!nl) | |
244 | break; | |
245 | new_pat = create_grep_pat(nl + 1, len - 1, p->origin, | |
246 | p->no, p->token, p->field); | |
247 | new_pat->next = p->next; | |
248 | if (!p->next) | |
249 | *tail = &new_pat->next; | |
250 | p->next = new_pat; | |
251 | *nl = '\0'; | |
252 | p->patternlen -= len; | |
253 | } | |
254 | break; | |
255 | default: | |
256 | break; | |
257 | } | |
2b3873ff RS |
258 | } |
259 | ||
fc456751 RS |
260 | void append_header_grep_pattern(struct grep_opt *opt, |
261 | enum grep_header_field field, const char *pat) | |
262 | { | |
263 | struct grep_pat *p = create_grep_pat(pat, strlen(pat), "header", 0, | |
264 | GREP_PATTERN_HEAD, field); | |
baa6378f JH |
265 | if (field == GREP_HEADER_REFLOG) |
266 | opt->use_reflog_filter = 1; | |
2b3873ff | 267 | do_append_grep_pat(&opt->header_tail, p); |
a4d7d2c6 JH |
268 | } |
269 | ||
83b5d2f5 JH |
270 | void append_grep_pattern(struct grep_opt *opt, const char *pat, |
271 | const char *origin, int no, enum grep_pat_token t) | |
ed40a095 RS |
272 | { |
273 | append_grep_pat(opt, pat, strlen(pat), origin, no, t); | |
274 | } | |
275 | ||
276 | void append_grep_pat(struct grep_opt *opt, const char *pat, size_t patlen, | |
277 | const char *origin, int no, enum grep_pat_token t) | |
83b5d2f5 | 278 | { |
fc456751 | 279 | struct grep_pat *p = create_grep_pat(pat, patlen, origin, no, t, 0); |
2b3873ff | 280 | do_append_grep_pat(&opt->pattern_tail, p); |
83b5d2f5 JH |
281 | } |
282 | ||
5b594f45 FK |
283 | struct grep_opt *grep_opt_dup(const struct grep_opt *opt) |
284 | { | |
285 | struct grep_pat *pat; | |
286 | struct grep_opt *ret = xmalloc(sizeof(struct grep_opt)); | |
287 | *ret = *opt; | |
288 | ||
289 | ret->pattern_list = NULL; | |
290 | ret->pattern_tail = &ret->pattern_list; | |
291 | ||
292 | for(pat = opt->pattern_list; pat != NULL; pat = pat->next) | |
293 | { | |
294 | if(pat->token == GREP_PATTERN_HEAD) | |
295 | append_header_grep_pattern(ret, pat->field, | |
296 | pat->pattern); | |
297 | else | |
ed40a095 RS |
298 | append_grep_pat(ret, pat->pattern, pat->patternlen, |
299 | pat->origin, pat->no, pat->token); | |
5b594f45 FK |
300 | } |
301 | ||
302 | return ret; | |
303 | } | |
304 | ||
a30c148a MK |
305 | static NORETURN void compile_regexp_failed(const struct grep_pat *p, |
306 | const char *error) | |
307 | { | |
308 | char where[1024]; | |
309 | ||
310 | if (p->no) | |
19bdd3e7 | 311 | xsnprintf(where, sizeof(where), "In '%s' at %d, ", p->origin, p->no); |
a30c148a | 312 | else if (p->origin) |
19bdd3e7 | 313 | xsnprintf(where, sizeof(where), "%s, ", p->origin); |
a30c148a MK |
314 | else |
315 | where[0] = 0; | |
316 | ||
317 | die("%s'%s': %s", where, p->pattern, error); | |
318 | } | |
319 | ||
63e7e9d8 MK |
320 | #ifdef USE_LIBPCRE |
321 | static void compile_pcre_regexp(struct grep_pat *p, const struct grep_opt *opt) | |
322 | { | |
323 | const char *error; | |
324 | int erroffset; | |
fba4f125 | 325 | int options = PCRE_MULTILINE; |
63e7e9d8 | 326 | |
9d9babb8 NTND |
327 | if (opt->ignore_case) { |
328 | if (has_non_ascii(p->pattern)) | |
329 | p->pcre_tables = pcre_maketables(); | |
63e7e9d8 | 330 | options |= PCRE_CASELESS; |
9d9babb8 | 331 | } |
18547aac NTND |
332 | if (is_utf8_locale() && has_non_ascii(p->pattern)) |
333 | options |= PCRE_UTF8; | |
63e7e9d8 MK |
334 | |
335 | p->pcre_regexp = pcre_compile(p->pattern, options, &error, &erroffset, | |
9d9babb8 | 336 | p->pcre_tables); |
63e7e9d8 MK |
337 | if (!p->pcre_regexp) |
338 | compile_regexp_failed(p, error); | |
339 | ||
340 | p->pcre_extra_info = pcre_study(p->pcre_regexp, 0, &error); | |
341 | if (!p->pcre_extra_info && error) | |
342 | die("%s", error); | |
343 | } | |
344 | ||
345 | static int pcrematch(struct grep_pat *p, const char *line, const char *eol, | |
346 | regmatch_t *match, int eflags) | |
347 | { | |
348 | int ovector[30], ret, flags = 0; | |
349 | ||
350 | if (eflags & REG_NOTBOL) | |
351 | flags |= PCRE_NOTBOL; | |
352 | ||
353 | ret = pcre_exec(p->pcre_regexp, p->pcre_extra_info, line, eol - line, | |
354 | 0, flags, ovector, ARRAY_SIZE(ovector)); | |
355 | if (ret < 0 && ret != PCRE_ERROR_NOMATCH) | |
356 | die("pcre_exec failed with error code %d", ret); | |
357 | if (ret > 0) { | |
358 | ret = 0; | |
359 | match->rm_so = ovector[0]; | |
360 | match->rm_eo = ovector[1]; | |
361 | } | |
362 | ||
363 | return ret; | |
364 | } | |
365 | ||
366 | static void free_pcre_regexp(struct grep_pat *p) | |
367 | { | |
368 | pcre_free(p->pcre_regexp); | |
369 | pcre_free(p->pcre_extra_info); | |
9d9babb8 | 370 | pcre_free((void *)p->pcre_tables); |
63e7e9d8 MK |
371 | } |
372 | #else /* !USE_LIBPCRE */ | |
373 | static void compile_pcre_regexp(struct grep_pat *p, const struct grep_opt *opt) | |
374 | { | |
375 | die("cannot use Perl-compatible regexes when not compiled with USE_LIBPCRE"); | |
376 | } | |
377 | ||
378 | static int pcrematch(struct grep_pat *p, const char *line, const char *eol, | |
379 | regmatch_t *match, int eflags) | |
380 | { | |
381 | return 1; | |
382 | } | |
383 | ||
384 | static void free_pcre_regexp(struct grep_pat *p) | |
385 | { | |
386 | } | |
387 | #endif /* !USE_LIBPCRE */ | |
388 | ||
9eceddee FK |
389 | static int is_fixed(const char *s, size_t len) |
390 | { | |
391 | size_t i; | |
392 | ||
393 | /* regcomp cannot accept patterns with NULs so we | |
394 | * consider any pattern containing a NUL fixed. | |
395 | */ | |
396 | if (memchr(s, 0, len)) | |
397 | return 1; | |
398 | ||
399 | for (i = 0; i < len; i++) { | |
400 | if (is_regex_special(s[i])) | |
401 | return 0; | |
402 | } | |
403 | ||
404 | return 1; | |
405 | } | |
406 | ||
793dc676 NTND |
407 | static void compile_fixed_regexp(struct grep_pat *p, struct grep_opt *opt) |
408 | { | |
409 | struct strbuf sb = STRBUF_INIT; | |
410 | int err; | |
411 | int regflags; | |
412 | ||
413 | basic_regex_quote_buf(&sb, p->pattern); | |
414 | regflags = opt->regflags & ~REG_EXTENDED; | |
415 | if (opt->ignore_case) | |
416 | regflags |= REG_ICASE; | |
417 | err = regcomp(&p->regexp, sb.buf, regflags); | |
418 | if (opt->debug) | |
419 | fprintf(stderr, "fixed %s\n", sb.buf); | |
420 | strbuf_release(&sb); | |
421 | if (err) { | |
422 | char errbuf[1024]; | |
423 | regerror(err, &p->regexp, errbuf, sizeof(errbuf)); | |
424 | regfree(&p->regexp); | |
425 | compile_regexp_failed(p, errbuf); | |
426 | } | |
427 | } | |
428 | ||
83b5d2f5 JH |
429 | static void compile_regexp(struct grep_pat *p, struct grep_opt *opt) |
430 | { | |
5c1ebcca | 431 | int icase, ascii_only; |
c822255c RS |
432 | int err; |
433 | ||
d7eb527d | 434 | p->word_regexp = opt->word_regexp; |
5183bf67 | 435 | p->ignore_case = opt->ignore_case; |
5c1ebcca NTND |
436 | icase = opt->regflags & REG_ICASE || p->ignore_case; |
437 | ascii_only = !has_non_ascii(p->pattern); | |
d7eb527d | 438 | |
793dc676 NTND |
439 | /* |
440 | * Even when -F (fixed) asks us to do a non-regexp search, we | |
441 | * may not be able to correctly case-fold when -i | |
442 | * (ignore-case) is asked (in which case, we'll synthesize a | |
443 | * regexp to match the pattern that matches regexp special | |
444 | * characters literally, while ignoring case differences). On | |
445 | * the other hand, even without -F, if the pattern does not | |
446 | * have any regexp special characters and there is no need for | |
447 | * case-folding search, we can internally turn it into a | |
448 | * simple string match using kws. p->fixed tells us if we | |
449 | * want to use kws. | |
450 | */ | |
9eceddee | 451 | if (opt->fixed || is_fixed(p->pattern, p->patternlen)) |
793dc676 | 452 | p->fixed = !icase || ascii_only; |
9eceddee FK |
453 | else |
454 | p->fixed = 0; | |
455 | ||
456 | if (p->fixed) { | |
695f95ba | 457 | p->kws = kwsalloc(icase ? tolower_trans_tbl : NULL); |
9eceddee FK |
458 | kwsincr(p->kws, p->pattern, p->patternlen); |
459 | kwsprep(p->kws); | |
c822255c | 460 | return; |
793dc676 NTND |
461 | } else if (opt->fixed) { |
462 | /* | |
463 | * We come here when the pattern has the non-ascii | |
464 | * characters we cannot case-fold, and asked to | |
465 | * ignore-case. | |
466 | */ | |
467 | compile_fixed_regexp(p, opt); | |
468 | return; | |
9eceddee | 469 | } |
c822255c | 470 | |
63e7e9d8 MK |
471 | if (opt->pcre) { |
472 | compile_pcre_regexp(p, opt); | |
473 | return; | |
474 | } | |
475 | ||
c822255c | 476 | err = regcomp(&p->regexp, p->pattern, opt->regflags); |
83b5d2f5 JH |
477 | if (err) { |
478 | char errbuf[1024]; | |
83b5d2f5 JH |
479 | regerror(err, &p->regexp, errbuf, 1024); |
480 | regfree(&p->regexp); | |
a30c148a | 481 | compile_regexp_failed(p, errbuf); |
83b5d2f5 JH |
482 | } |
483 | } | |
484 | ||
0ab7befa | 485 | static struct grep_expr *compile_pattern_or(struct grep_pat **); |
83b5d2f5 JH |
486 | static struct grep_expr *compile_pattern_atom(struct grep_pat **list) |
487 | { | |
488 | struct grep_pat *p; | |
489 | struct grep_expr *x; | |
490 | ||
491 | p = *list; | |
c922b01f LT |
492 | if (!p) |
493 | return NULL; | |
83b5d2f5 JH |
494 | switch (p->token) { |
495 | case GREP_PATTERN: /* atom */ | |
480c1ca6 JH |
496 | case GREP_PATTERN_HEAD: |
497 | case GREP_PATTERN_BODY: | |
83b5d2f5 JH |
498 | x = xcalloc(1, sizeof (struct grep_expr)); |
499 | x->node = GREP_NODE_ATOM; | |
500 | x->u.atom = p; | |
501 | *list = p->next; | |
502 | return x; | |
503 | case GREP_OPEN_PAREN: | |
504 | *list = p->next; | |
0ab7befa | 505 | x = compile_pattern_or(list); |
83b5d2f5 JH |
506 | if (!*list || (*list)->token != GREP_CLOSE_PAREN) |
507 | die("unmatched parenthesis"); | |
508 | *list = (*list)->next; | |
509 | return x; | |
510 | default: | |
511 | return NULL; | |
512 | } | |
513 | } | |
514 | ||
515 | static struct grep_expr *compile_pattern_not(struct grep_pat **list) | |
516 | { | |
517 | struct grep_pat *p; | |
518 | struct grep_expr *x; | |
519 | ||
520 | p = *list; | |
c922b01f LT |
521 | if (!p) |
522 | return NULL; | |
83b5d2f5 JH |
523 | switch (p->token) { |
524 | case GREP_NOT: | |
525 | if (!p->next) | |
526 | die("--not not followed by pattern expression"); | |
527 | *list = p->next; | |
528 | x = xcalloc(1, sizeof (struct grep_expr)); | |
529 | x->node = GREP_NODE_NOT; | |
530 | x->u.unary = compile_pattern_not(list); | |
531 | if (!x->u.unary) | |
532 | die("--not followed by non pattern expression"); | |
533 | return x; | |
534 | default: | |
535 | return compile_pattern_atom(list); | |
536 | } | |
537 | } | |
538 | ||
539 | static struct grep_expr *compile_pattern_and(struct grep_pat **list) | |
540 | { | |
541 | struct grep_pat *p; | |
542 | struct grep_expr *x, *y, *z; | |
543 | ||
544 | x = compile_pattern_not(list); | |
545 | p = *list; | |
546 | if (p && p->token == GREP_AND) { | |
547 | if (!p->next) | |
548 | die("--and not followed by pattern expression"); | |
549 | *list = p->next; | |
550 | y = compile_pattern_and(list); | |
551 | if (!y) | |
552 | die("--and not followed by pattern expression"); | |
553 | z = xcalloc(1, sizeof (struct grep_expr)); | |
554 | z->node = GREP_NODE_AND; | |
555 | z->u.binary.left = x; | |
556 | z->u.binary.right = y; | |
557 | return z; | |
558 | } | |
559 | return x; | |
560 | } | |
561 | ||
562 | static struct grep_expr *compile_pattern_or(struct grep_pat **list) | |
563 | { | |
564 | struct grep_pat *p; | |
565 | struct grep_expr *x, *y, *z; | |
566 | ||
567 | x = compile_pattern_and(list); | |
568 | p = *list; | |
569 | if (x && p && p->token != GREP_CLOSE_PAREN) { | |
570 | y = compile_pattern_or(list); | |
571 | if (!y) | |
572 | die("not a pattern expression %s", p->pattern); | |
573 | z = xcalloc(1, sizeof (struct grep_expr)); | |
574 | z->node = GREP_NODE_OR; | |
575 | z->u.binary.left = x; | |
576 | z->u.binary.right = y; | |
577 | return z; | |
578 | } | |
579 | return x; | |
580 | } | |
581 | ||
582 | static struct grep_expr *compile_pattern_expr(struct grep_pat **list) | |
583 | { | |
584 | return compile_pattern_or(list); | |
585 | } | |
586 | ||
17bf35a3 JH |
587 | static void indent(int in) |
588 | { | |
589 | while (in-- > 0) | |
590 | fputc(' ', stderr); | |
591 | } | |
592 | ||
593 | static void dump_grep_pat(struct grep_pat *p) | |
594 | { | |
595 | switch (p->token) { | |
596 | case GREP_AND: fprintf(stderr, "*and*"); break; | |
597 | case GREP_OPEN_PAREN: fprintf(stderr, "*(*"); break; | |
598 | case GREP_CLOSE_PAREN: fprintf(stderr, "*)*"); break; | |
599 | case GREP_NOT: fprintf(stderr, "*not*"); break; | |
600 | case GREP_OR: fprintf(stderr, "*or*"); break; | |
601 | ||
602 | case GREP_PATTERN: fprintf(stderr, "pattern"); break; | |
603 | case GREP_PATTERN_HEAD: fprintf(stderr, "pattern_head"); break; | |
604 | case GREP_PATTERN_BODY: fprintf(stderr, "pattern_body"); break; | |
605 | } | |
606 | ||
607 | switch (p->token) { | |
608 | default: break; | |
609 | case GREP_PATTERN_HEAD: | |
610 | fprintf(stderr, "<head %d>", p->field); break; | |
611 | case GREP_PATTERN_BODY: | |
612 | fprintf(stderr, "<body>"); break; | |
613 | } | |
614 | switch (p->token) { | |
615 | default: break; | |
616 | case GREP_PATTERN_HEAD: | |
617 | case GREP_PATTERN_BODY: | |
618 | case GREP_PATTERN: | |
619 | fprintf(stderr, "%.*s", (int)p->patternlen, p->pattern); | |
620 | break; | |
621 | } | |
622 | fputc('\n', stderr); | |
623 | } | |
624 | ||
625 | static void dump_grep_expression_1(struct grep_expr *x, int in) | |
626 | { | |
627 | indent(in); | |
628 | switch (x->node) { | |
629 | case GREP_NODE_TRUE: | |
630 | fprintf(stderr, "true\n"); | |
631 | break; | |
632 | case GREP_NODE_ATOM: | |
633 | dump_grep_pat(x->u.atom); | |
634 | break; | |
635 | case GREP_NODE_NOT: | |
636 | fprintf(stderr, "(not\n"); | |
637 | dump_grep_expression_1(x->u.unary, in+1); | |
638 | indent(in); | |
639 | fprintf(stderr, ")\n"); | |
640 | break; | |
641 | case GREP_NODE_AND: | |
642 | fprintf(stderr, "(and\n"); | |
643 | dump_grep_expression_1(x->u.binary.left, in+1); | |
644 | dump_grep_expression_1(x->u.binary.right, in+1); | |
645 | indent(in); | |
646 | fprintf(stderr, ")\n"); | |
647 | break; | |
648 | case GREP_NODE_OR: | |
649 | fprintf(stderr, "(or\n"); | |
650 | dump_grep_expression_1(x->u.binary.left, in+1); | |
651 | dump_grep_expression_1(x->u.binary.right, in+1); | |
652 | indent(in); | |
653 | fprintf(stderr, ")\n"); | |
654 | break; | |
655 | } | |
656 | } | |
657 | ||
07a7d656 | 658 | static void dump_grep_expression(struct grep_opt *opt) |
17bf35a3 JH |
659 | { |
660 | struct grep_expr *x = opt->pattern_expression; | |
661 | ||
662 | if (opt->all_match) | |
663 | fprintf(stderr, "[all-match]\n"); | |
664 | dump_grep_expression_1(x, 0); | |
665 | fflush(NULL); | |
666 | } | |
667 | ||
5aaeb733 JH |
668 | static struct grep_expr *grep_true_expr(void) |
669 | { | |
670 | struct grep_expr *z = xcalloc(1, sizeof(*z)); | |
671 | z->node = GREP_NODE_TRUE; | |
672 | return z; | |
673 | } | |
674 | ||
675 | static struct grep_expr *grep_or_expr(struct grep_expr *left, struct grep_expr *right) | |
676 | { | |
677 | struct grep_expr *z = xcalloc(1, sizeof(*z)); | |
678 | z->node = GREP_NODE_OR; | |
679 | z->u.binary.left = left; | |
680 | z->u.binary.right = right; | |
681 | return z; | |
682 | } | |
683 | ||
95ce9ce2 | 684 | static struct grep_expr *prep_header_patterns(struct grep_opt *opt) |
83b5d2f5 JH |
685 | { |
686 | struct grep_pat *p; | |
95ce9ce2 | 687 | struct grep_expr *header_expr; |
5aaeb733 JH |
688 | struct grep_expr *(header_group[GREP_HEADER_FIELD_MAX]); |
689 | enum grep_header_field fld; | |
83b5d2f5 | 690 | |
95ce9ce2 JH |
691 | if (!opt->header_list) |
692 | return NULL; | |
2385f246 | 693 | |
95ce9ce2 JH |
694 | for (p = opt->header_list; p; p = p->next) { |
695 | if (p->token != GREP_PATTERN_HEAD) | |
ef1177d1 | 696 | die("BUG: a non-header pattern in grep header list."); |
3ce3ffb8 AP |
697 | if (p->field < GREP_HEADER_FIELD_MIN || |
698 | GREP_HEADER_FIELD_MAX <= p->field) | |
ef1177d1 | 699 | die("BUG: unknown header field %d", p->field); |
95ce9ce2 | 700 | compile_regexp(p, opt); |
80235ba7 | 701 | } |
5aaeb733 JH |
702 | |
703 | for (fld = 0; fld < GREP_HEADER_FIELD_MAX; fld++) | |
704 | header_group[fld] = NULL; | |
705 | ||
706 | for (p = opt->header_list; p; p = p->next) { | |
707 | struct grep_expr *h; | |
708 | struct grep_pat *pp = p; | |
709 | ||
710 | h = compile_pattern_atom(&pp); | |
711 | if (!h || pp != p->next) | |
ef1177d1 | 712 | die("BUG: malformed header expr"); |
5aaeb733 JH |
713 | if (!header_group[p->field]) { |
714 | header_group[p->field] = h; | |
715 | continue; | |
716 | } | |
717 | header_group[p->field] = grep_or_expr(h, header_group[p->field]); | |
718 | } | |
719 | ||
720 | header_expr = NULL; | |
721 | ||
722 | for (fld = 0; fld < GREP_HEADER_FIELD_MAX; fld++) { | |
723 | if (!header_group[fld]) | |
724 | continue; | |
725 | if (!header_expr) | |
726 | header_expr = grep_true_expr(); | |
727 | header_expr = grep_or_expr(header_group[fld], header_expr); | |
728 | } | |
95ce9ce2 JH |
729 | return header_expr; |
730 | } | |
731 | ||
13e4fc7e JH |
732 | static struct grep_expr *grep_splice_or(struct grep_expr *x, struct grep_expr *y) |
733 | { | |
734 | struct grep_expr *z = x; | |
735 | ||
736 | while (x) { | |
737 | assert(x->node == GREP_NODE_OR); | |
738 | if (x->u.binary.right && | |
739 | x->u.binary.right->node == GREP_NODE_TRUE) { | |
740 | x->u.binary.right = y; | |
741 | break; | |
742 | } | |
743 | x = x->u.binary.right; | |
744 | } | |
745 | return z; | |
746 | } | |
747 | ||
17bf35a3 | 748 | static void compile_grep_patterns_real(struct grep_opt *opt) |
95ce9ce2 JH |
749 | { |
750 | struct grep_pat *p; | |
751 | struct grep_expr *header_expr = prep_header_patterns(opt); | |
0ab7befa | 752 | |
83b5d2f5 | 753 | for (p = opt->pattern_list; p; p = p->next) { |
480c1ca6 JH |
754 | switch (p->token) { |
755 | case GREP_PATTERN: /* atom */ | |
756 | case GREP_PATTERN_HEAD: | |
757 | case GREP_PATTERN_BODY: | |
c822255c | 758 | compile_regexp(p, opt); |
480c1ca6 JH |
759 | break; |
760 | default: | |
83b5d2f5 | 761 | opt->extended = 1; |
480c1ca6 JH |
762 | break; |
763 | } | |
83b5d2f5 JH |
764 | } |
765 | ||
80235ba7 JH |
766 | if (opt->all_match || header_expr) |
767 | opt->extended = 1; | |
17bf35a3 | 768 | else if (!opt->extended && !opt->debug) |
83b5d2f5 JH |
769 | return; |
770 | ||
83b5d2f5 | 771 | p = opt->pattern_list; |
ba150a3f MB |
772 | if (p) |
773 | opt->pattern_expression = compile_pattern_expr(&p); | |
83b5d2f5 JH |
774 | if (p) |
775 | die("incomplete pattern expression: %s", p->pattern); | |
80235ba7 JH |
776 | |
777 | if (!header_expr) | |
778 | return; | |
779 | ||
5aaeb733 | 780 | if (!opt->pattern_expression) |
80235ba7 | 781 | opt->pattern_expression = header_expr; |
13e4fc7e JH |
782 | else if (opt->all_match) |
783 | opt->pattern_expression = grep_splice_or(header_expr, | |
784 | opt->pattern_expression); | |
5aaeb733 JH |
785 | else |
786 | opt->pattern_expression = grep_or_expr(opt->pattern_expression, | |
787 | header_expr); | |
80235ba7 | 788 | opt->all_match = 1; |
83b5d2f5 JH |
789 | } |
790 | ||
17bf35a3 JH |
791 | void compile_grep_patterns(struct grep_opt *opt) |
792 | { | |
793 | compile_grep_patterns_real(opt); | |
794 | if (opt->debug) | |
795 | dump_grep_expression(opt); | |
796 | } | |
797 | ||
b48fb5b6 JH |
798 | static void free_pattern_expr(struct grep_expr *x) |
799 | { | |
800 | switch (x->node) { | |
5aaeb733 | 801 | case GREP_NODE_TRUE: |
b48fb5b6 JH |
802 | case GREP_NODE_ATOM: |
803 | break; | |
804 | case GREP_NODE_NOT: | |
805 | free_pattern_expr(x->u.unary); | |
806 | break; | |
807 | case GREP_NODE_AND: | |
808 | case GREP_NODE_OR: | |
809 | free_pattern_expr(x->u.binary.left); | |
810 | free_pattern_expr(x->u.binary.right); | |
811 | break; | |
812 | } | |
813 | free(x); | |
814 | } | |
815 | ||
816 | void free_grep_patterns(struct grep_opt *opt) | |
817 | { | |
818 | struct grep_pat *p, *n; | |
819 | ||
820 | for (p = opt->pattern_list; p; p = n) { | |
821 | n = p->next; | |
822 | switch (p->token) { | |
823 | case GREP_PATTERN: /* atom */ | |
824 | case GREP_PATTERN_HEAD: | |
825 | case GREP_PATTERN_BODY: | |
9eceddee FK |
826 | if (p->kws) |
827 | kwsfree(p->kws); | |
828 | else if (p->pcre_regexp) | |
63e7e9d8 MK |
829 | free_pcre_regexp(p); |
830 | else | |
831 | regfree(&p->regexp); | |
526a858a | 832 | free(p->pattern); |
b48fb5b6 JH |
833 | break; |
834 | default: | |
835 | break; | |
836 | } | |
837 | free(p); | |
838 | } | |
839 | ||
840 | if (!opt->extended) | |
841 | return; | |
842 | free_pattern_expr(opt->pattern_expression); | |
843 | } | |
844 | ||
83b5d2f5 JH |
845 | static char *end_of_line(char *cp, unsigned long *left) |
846 | { | |
847 | unsigned long l = *left; | |
848 | while (l && *cp != '\n') { | |
849 | l--; | |
850 | cp++; | |
851 | } | |
852 | *left = l; | |
853 | return cp; | |
854 | } | |
855 | ||
856 | static int word_char(char ch) | |
857 | { | |
858 | return isalnum(ch) || ch == '_'; | |
859 | } | |
860 | ||
55f638bd ML |
861 | static void output_color(struct grep_opt *opt, const void *data, size_t size, |
862 | const char *color) | |
863 | { | |
daa0c3d9 | 864 | if (want_color(opt->color) && color && color[0]) { |
55f638bd ML |
865 | opt->output(opt, color, strlen(color)); |
866 | opt->output(opt, data, size); | |
867 | opt->output(opt, GIT_COLOR_RESET, strlen(GIT_COLOR_RESET)); | |
868 | } else | |
869 | opt->output(opt, data, size); | |
870 | } | |
871 | ||
872 | static void output_sep(struct grep_opt *opt, char sign) | |
873 | { | |
874 | if (opt->null_following_name) | |
875 | opt->output(opt, "\0", 1); | |
876 | else | |
877 | output_color(opt, &sign, 1, opt->color_sep); | |
878 | } | |
879 | ||
83caecca RZ |
880 | static void show_name(struct grep_opt *opt, const char *name) |
881 | { | |
55f638bd | 882 | output_color(opt, name, strlen(name), opt->color_filename); |
5b594f45 | 883 | opt->output(opt, opt->null_following_name ? "\0" : "\n", 1); |
83caecca RZ |
884 | } |
885 | ||
ed40a095 RS |
886 | static int fixmatch(struct grep_pat *p, char *line, char *eol, |
887 | regmatch_t *match) | |
83b5d2f5 | 888 | { |
9eceddee FK |
889 | struct kwsmatch kwsm; |
890 | size_t offset = kwsexec(p->kws, line, eol - line, &kwsm); | |
891 | if (offset == -1) { | |
83b5d2f5 JH |
892 | match->rm_so = match->rm_eo = -1; |
893 | return REG_NOMATCH; | |
9eceddee FK |
894 | } else { |
895 | match->rm_so = offset; | |
896 | match->rm_eo = match->rm_so + kwsm.size[0]; | |
83b5d2f5 JH |
897 | return 0; |
898 | } | |
899 | } | |
900 | ||
97e77784 MK |
901 | static int patmatch(struct grep_pat *p, char *line, char *eol, |
902 | regmatch_t *match, int eflags) | |
903 | { | |
904 | int hit; | |
905 | ||
906 | if (p->fixed) | |
907 | hit = !fixmatch(p, line, eol, match); | |
63e7e9d8 MK |
908 | else if (p->pcre_regexp) |
909 | hit = !pcrematch(p, line, eol, match, eflags); | |
97e77784 | 910 | else |
b7d36ffc JS |
911 | hit = !regexec_buf(&p->regexp, line, eol - line, 1, match, |
912 | eflags); | |
97e77784 MK |
913 | |
914 | return hit; | |
915 | } | |
916 | ||
a4d7d2c6 JH |
917 | static int strip_timestamp(char *bol, char **eol_p) |
918 | { | |
919 | char *eol = *eol_p; | |
920 | int ch; | |
921 | ||
922 | while (bol < --eol) { | |
923 | if (*eol != '>') | |
924 | continue; | |
925 | *eol_p = ++eol; | |
926 | ch = *eol; | |
927 | *eol = '\0'; | |
928 | return ch; | |
929 | } | |
930 | return 0; | |
931 | } | |
932 | ||
933 | static struct { | |
934 | const char *field; | |
935 | size_t len; | |
936 | } header_field[] = { | |
937 | { "author ", 7 }, | |
938 | { "committer ", 10 }, | |
72fd13f7 | 939 | { "reflog ", 7 }, |
a4d7d2c6 JH |
940 | }; |
941 | ||
d7eb527d | 942 | static int match_one_pattern(struct grep_pat *p, char *bol, char *eol, |
79212772 RS |
943 | enum grep_context ctx, |
944 | regmatch_t *pmatch, int eflags) | |
83b5d2f5 JH |
945 | { |
946 | int hit = 0; | |
a4d7d2c6 | 947 | int saved_ch = 0; |
e701fadb | 948 | const char *start = bol; |
83b5d2f5 | 949 | |
480c1ca6 JH |
950 | if ((p->token != GREP_PATTERN) && |
951 | ((p->token == GREP_PATTERN_HEAD) != (ctx == GREP_CONTEXT_HEAD))) | |
952 | return 0; | |
953 | ||
a4d7d2c6 JH |
954 | if (p->token == GREP_PATTERN_HEAD) { |
955 | const char *field; | |
956 | size_t len; | |
957 | assert(p->field < ARRAY_SIZE(header_field)); | |
958 | field = header_field[p->field].field; | |
959 | len = header_field[p->field].len; | |
960 | if (strncmp(bol, field, len)) | |
961 | return 0; | |
962 | bol += len; | |
ad4813b3 NTND |
963 | switch (p->field) { |
964 | case GREP_HEADER_AUTHOR: | |
965 | case GREP_HEADER_COMMITTER: | |
966 | saved_ch = strip_timestamp(bol, &eol); | |
967 | break; | |
968 | default: | |
969 | break; | |
970 | } | |
a4d7d2c6 JH |
971 | } |
972 | ||
83b5d2f5 | 973 | again: |
97e77784 | 974 | hit = patmatch(p, bol, eol, pmatch, eflags); |
83b5d2f5 | 975 | |
d7eb527d | 976 | if (hit && p->word_regexp) { |
83b5d2f5 | 977 | if ((pmatch[0].rm_so < 0) || |
84201eae | 978 | (eol - bol) < pmatch[0].rm_so || |
83b5d2f5 JH |
979 | (pmatch[0].rm_eo < 0) || |
980 | (eol - bol) < pmatch[0].rm_eo) | |
981 | die("regexp returned nonsense"); | |
982 | ||
983 | /* Match beginning must be either beginning of the | |
984 | * line, or at word boundary (i.e. the last char must | |
985 | * not be a word char). Similarly, match end must be | |
986 | * either end of the line, or at word boundary | |
987 | * (i.e. the next char must not be a word char). | |
988 | */ | |
fb62eb7f | 989 | if ( ((pmatch[0].rm_so == 0) || |
83b5d2f5 JH |
990 | !word_char(bol[pmatch[0].rm_so-1])) && |
991 | ((pmatch[0].rm_eo == (eol-bol)) || | |
992 | !word_char(bol[pmatch[0].rm_eo])) ) | |
993 | ; | |
994 | else | |
995 | hit = 0; | |
996 | ||
84201eae RS |
997 | /* Words consist of at least one character. */ |
998 | if (pmatch->rm_so == pmatch->rm_eo) | |
999 | hit = 0; | |
1000 | ||
83b5d2f5 JH |
1001 | if (!hit && pmatch[0].rm_so + bol + 1 < eol) { |
1002 | /* There could be more than one match on the | |
1003 | * line, and the first match might not be | |
1004 | * strict word match. But later ones could be! | |
fb62eb7f RS |
1005 | * Forward to the next possible start, i.e. the |
1006 | * next position following a non-word char. | |
83b5d2f5 JH |
1007 | */ |
1008 | bol = pmatch[0].rm_so + bol + 1; | |
fb62eb7f RS |
1009 | while (word_char(bol[-1]) && bol < eol) |
1010 | bol++; | |
dbb6a4ad | 1011 | eflags |= REG_NOTBOL; |
fb62eb7f RS |
1012 | if (bol < eol) |
1013 | goto again; | |
83b5d2f5 JH |
1014 | } |
1015 | } | |
a4d7d2c6 JH |
1016 | if (p->token == GREP_PATTERN_HEAD && saved_ch) |
1017 | *eol = saved_ch; | |
e701fadb RS |
1018 | if (hit) { |
1019 | pmatch[0].rm_so += bol - start; | |
1020 | pmatch[0].rm_eo += bol - start; | |
1021 | } | |
83b5d2f5 JH |
1022 | return hit; |
1023 | } | |
1024 | ||
d7eb527d RS |
1025 | static int match_expr_eval(struct grep_expr *x, char *bol, char *eol, |
1026 | enum grep_context ctx, int collect_hits) | |
83b5d2f5 | 1027 | { |
0ab7befa | 1028 | int h = 0; |
79212772 | 1029 | regmatch_t match; |
0ab7befa | 1030 | |
c922b01f LT |
1031 | if (!x) |
1032 | die("Not a valid grep expression"); | |
83b5d2f5 | 1033 | switch (x->node) { |
5aaeb733 JH |
1034 | case GREP_NODE_TRUE: |
1035 | h = 1; | |
1036 | break; | |
83b5d2f5 | 1037 | case GREP_NODE_ATOM: |
79212772 | 1038 | h = match_one_pattern(x->u.atom, bol, eol, ctx, &match, 0); |
83b5d2f5 JH |
1039 | break; |
1040 | case GREP_NODE_NOT: | |
d7eb527d | 1041 | h = !match_expr_eval(x->u.unary, bol, eol, ctx, 0); |
0ab7befa | 1042 | break; |
83b5d2f5 | 1043 | case GREP_NODE_AND: |
d7eb527d | 1044 | if (!match_expr_eval(x->u.binary.left, bol, eol, ctx, 0)) |
252d560d | 1045 | return 0; |
d7eb527d | 1046 | h = match_expr_eval(x->u.binary.right, bol, eol, ctx, 0); |
0ab7befa | 1047 | break; |
83b5d2f5 | 1048 | case GREP_NODE_OR: |
0ab7befa | 1049 | if (!collect_hits) |
d7eb527d | 1050 | return (match_expr_eval(x->u.binary.left, |
0ab7befa | 1051 | bol, eol, ctx, 0) || |
d7eb527d | 1052 | match_expr_eval(x->u.binary.right, |
0ab7befa | 1053 | bol, eol, ctx, 0)); |
d7eb527d | 1054 | h = match_expr_eval(x->u.binary.left, bol, eol, ctx, 0); |
0ab7befa | 1055 | x->u.binary.left->hit |= h; |
d7eb527d | 1056 | h |= match_expr_eval(x->u.binary.right, bol, eol, ctx, 1); |
0ab7befa JH |
1057 | break; |
1058 | default: | |
d7530708 | 1059 | die("Unexpected node type (internal error) %d", x->node); |
83b5d2f5 | 1060 | } |
0ab7befa JH |
1061 | if (collect_hits) |
1062 | x->hit |= h; | |
1063 | return h; | |
83b5d2f5 JH |
1064 | } |
1065 | ||
480c1ca6 | 1066 | static int match_expr(struct grep_opt *opt, char *bol, char *eol, |
0ab7befa | 1067 | enum grep_context ctx, int collect_hits) |
83b5d2f5 JH |
1068 | { |
1069 | struct grep_expr *x = opt->pattern_expression; | |
d7eb527d | 1070 | return match_expr_eval(x, bol, eol, ctx, collect_hits); |
83b5d2f5 JH |
1071 | } |
1072 | ||
480c1ca6 | 1073 | static int match_line(struct grep_opt *opt, char *bol, char *eol, |
0ab7befa | 1074 | enum grep_context ctx, int collect_hits) |
83b5d2f5 JH |
1075 | { |
1076 | struct grep_pat *p; | |
79212772 RS |
1077 | regmatch_t match; |
1078 | ||
83b5d2f5 | 1079 | if (opt->extended) |
0ab7befa JH |
1080 | return match_expr(opt, bol, eol, ctx, collect_hits); |
1081 | ||
1082 | /* we do not call with collect_hits without being extended */ | |
83b5d2f5 | 1083 | for (p = opt->pattern_list; p; p = p->next) { |
79212772 | 1084 | if (match_one_pattern(p, bol, eol, ctx, &match, 0)) |
83b5d2f5 JH |
1085 | return 1; |
1086 | } | |
1087 | return 0; | |
1088 | } | |
1089 | ||
7e8f59d5 RS |
1090 | static int match_next_pattern(struct grep_pat *p, char *bol, char *eol, |
1091 | enum grep_context ctx, | |
1092 | regmatch_t *pmatch, int eflags) | |
1093 | { | |
1094 | regmatch_t match; | |
1095 | ||
1096 | if (!match_one_pattern(p, bol, eol, ctx, &match, eflags)) | |
1097 | return 0; | |
1098 | if (match.rm_so < 0 || match.rm_eo < 0) | |
1099 | return 0; | |
1100 | if (pmatch->rm_so >= 0 && pmatch->rm_eo >= 0) { | |
1101 | if (match.rm_so > pmatch->rm_so) | |
1102 | return 1; | |
1103 | if (match.rm_so == pmatch->rm_so && match.rm_eo < pmatch->rm_eo) | |
1104 | return 1; | |
1105 | } | |
1106 | pmatch->rm_so = match.rm_so; | |
1107 | pmatch->rm_eo = match.rm_eo; | |
1108 | return 1; | |
1109 | } | |
1110 | ||
1111 | static int next_match(struct grep_opt *opt, char *bol, char *eol, | |
1112 | enum grep_context ctx, regmatch_t *pmatch, int eflags) | |
1113 | { | |
1114 | struct grep_pat *p; | |
1115 | int hit = 0; | |
1116 | ||
1117 | pmatch->rm_so = pmatch->rm_eo = -1; | |
1118 | if (bol < eol) { | |
1119 | for (p = opt->pattern_list; p; p = p->next) { | |
1120 | switch (p->token) { | |
1121 | case GREP_PATTERN: /* atom */ | |
1122 | case GREP_PATTERN_HEAD: | |
1123 | case GREP_PATTERN_BODY: | |
1124 | hit |= match_next_pattern(p, bol, eol, ctx, | |
1125 | pmatch, eflags); | |
1126 | break; | |
1127 | default: | |
1128 | break; | |
1129 | } | |
1130 | } | |
1131 | } | |
1132 | return hit; | |
1133 | } | |
1134 | ||
1135 | static void show_line(struct grep_opt *opt, char *bol, char *eol, | |
1136 | const char *name, unsigned lno, char sign) | |
1137 | { | |
1138 | int rest = eol - bol; | |
79a77109 | 1139 | const char *match_color, *line_color = NULL; |
7e8f59d5 | 1140 | |
a8f0e764 RS |
1141 | if (opt->file_break && opt->last_shown == 0) { |
1142 | if (opt->show_hunk_mark) | |
1143 | opt->output(opt, "\n", 1); | |
ba8ea749 | 1144 | } else if (opt->pre_context || opt->post_context || opt->funcbody) { |
046802d0 | 1145 | if (opt->last_shown == 0) { |
55f638bd ML |
1146 | if (opt->show_hunk_mark) { |
1147 | output_color(opt, "--", 2, opt->color_sep); | |
1148 | opt->output(opt, "\n", 1); | |
07b838f0 | 1149 | } |
55f638bd ML |
1150 | } else if (lno > opt->last_shown + 1) { |
1151 | output_color(opt, "--", 2, opt->color_sep); | |
1152 | opt->output(opt, "\n", 1); | |
1153 | } | |
5dd06d38 | 1154 | } |
1d84f72e RS |
1155 | if (opt->heading && opt->last_shown == 0) { |
1156 | output_color(opt, name, strlen(name), opt->color_filename); | |
1157 | opt->output(opt, "\n", 1); | |
1158 | } | |
5dd06d38 RS |
1159 | opt->last_shown = lno; |
1160 | ||
1d84f72e | 1161 | if (!opt->heading && opt->pathname) { |
55f638bd ML |
1162 | output_color(opt, name, strlen(name), opt->color_filename); |
1163 | output_sep(opt, sign); | |
5b594f45 FK |
1164 | } |
1165 | if (opt->linenum) { | |
1166 | char buf[32]; | |
1167 | snprintf(buf, sizeof(buf), "%d", lno); | |
55f638bd ML |
1168 | output_color(opt, buf, strlen(buf), opt->color_lineno); |
1169 | output_sep(opt, sign); | |
5b594f45 | 1170 | } |
7e8f59d5 RS |
1171 | if (opt->color) { |
1172 | regmatch_t match; | |
1173 | enum grep_context ctx = GREP_CONTEXT_BODY; | |
1174 | int ch = *eol; | |
1175 | int eflags = 0; | |
1176 | ||
79a77109 RS |
1177 | if (sign == ':') |
1178 | match_color = opt->color_match_selected; | |
1179 | else | |
1180 | match_color = opt->color_match_context; | |
00588bb5 ML |
1181 | if (sign == ':') |
1182 | line_color = opt->color_selected; | |
1183 | else if (sign == '-') | |
1184 | line_color = opt->color_context; | |
1185 | else if (sign == '=') | |
1186 | line_color = opt->color_function; | |
7e8f59d5 RS |
1187 | *eol = '\0'; |
1188 | while (next_match(opt, bol, eol, ctx, &match, eflags)) { | |
1f5b9cc4 RS |
1189 | if (match.rm_so == match.rm_eo) |
1190 | break; | |
5b594f45 | 1191 | |
00588bb5 | 1192 | output_color(opt, bol, match.rm_so, line_color); |
55f638bd | 1193 | output_color(opt, bol + match.rm_so, |
79a77109 | 1194 | match.rm_eo - match.rm_so, match_color); |
7e8f59d5 RS |
1195 | bol += match.rm_eo; |
1196 | rest -= match.rm_eo; | |
1197 | eflags = REG_NOTBOL; | |
1198 | } | |
1199 | *eol = ch; | |
1200 | } | |
00588bb5 | 1201 | output_color(opt, bol, rest, line_color); |
5b594f45 | 1202 | opt->output(opt, "\n", 1); |
7e8f59d5 RS |
1203 | } |
1204 | ||
0579f91d | 1205 | #ifndef NO_PTHREADS |
78db6ea9 JK |
1206 | int grep_use_locks; |
1207 | ||
0579f91d TR |
1208 | /* |
1209 | * This lock protects access to the gitattributes machinery, which is | |
1210 | * not thread-safe. | |
1211 | */ | |
1212 | pthread_mutex_t grep_attr_mutex; | |
1213 | ||
78db6ea9 | 1214 | static inline void grep_attr_lock(void) |
0579f91d | 1215 | { |
78db6ea9 | 1216 | if (grep_use_locks) |
0579f91d TR |
1217 | pthread_mutex_lock(&grep_attr_mutex); |
1218 | } | |
1219 | ||
78db6ea9 | 1220 | static inline void grep_attr_unlock(void) |
0579f91d | 1221 | { |
78db6ea9 | 1222 | if (grep_use_locks) |
0579f91d TR |
1223 | pthread_mutex_unlock(&grep_attr_mutex); |
1224 | } | |
b3aeb285 JK |
1225 | |
1226 | /* | |
1227 | * Same as git_attr_mutex, but protecting the thread-unsafe object db access. | |
1228 | */ | |
1229 | pthread_mutex_t grep_read_mutex; | |
1230 | ||
0579f91d | 1231 | #else |
78db6ea9 JK |
1232 | #define grep_attr_lock() |
1233 | #define grep_attr_unlock() | |
0579f91d TR |
1234 | #endif |
1235 | ||
e1327023 | 1236 | static int match_funcname(struct grep_opt *opt, struct grep_source *gs, char *bol, char *eol) |
2944e4e6 | 1237 | { |
60ecac98 | 1238 | xdemitconf_t *xecfg = opt->priv; |
0579f91d | 1239 | if (xecfg && !xecfg->find_func) { |
94ad9d9e JK |
1240 | grep_source_load_driver(gs); |
1241 | if (gs->driver->funcname.pattern) { | |
1242 | const struct userdiff_funcname *pe = &gs->driver->funcname; | |
0579f91d TR |
1243 | xdiff_set_find_func(xecfg, pe->pattern, pe->cflags); |
1244 | } else { | |
1245 | xecfg = opt->priv = NULL; | |
1246 | } | |
1247 | } | |
1248 | ||
1249 | if (xecfg) { | |
60ecac98 RS |
1250 | char buf[1]; |
1251 | return xecfg->find_func(bol, eol - bol, buf, 1, | |
1252 | xecfg->find_func_priv) >= 0; | |
1253 | } | |
1254 | ||
2944e4e6 RS |
1255 | if (bol == eol) |
1256 | return 0; | |
1257 | if (isalpha(*bol) || *bol == '_' || *bol == '$') | |
1258 | return 1; | |
1259 | return 0; | |
1260 | } | |
1261 | ||
e1327023 JK |
1262 | static void show_funcname_line(struct grep_opt *opt, struct grep_source *gs, |
1263 | char *bol, unsigned lno) | |
2944e4e6 | 1264 | { |
e1327023 | 1265 | while (bol > gs->buf) { |
2944e4e6 RS |
1266 | char *eol = --bol; |
1267 | ||
e1327023 | 1268 | while (bol > gs->buf && bol[-1] != '\n') |
2944e4e6 RS |
1269 | bol--; |
1270 | lno--; | |
1271 | ||
1272 | if (lno <= opt->last_shown) | |
1273 | break; | |
1274 | ||
e1327023 JK |
1275 | if (match_funcname(opt, gs, bol, eol)) { |
1276 | show_line(opt, bol, eol, gs->name, lno, '='); | |
2944e4e6 RS |
1277 | break; |
1278 | } | |
1279 | } | |
1280 | } | |
1281 | ||
e1327023 | 1282 | static void show_pre_context(struct grep_opt *opt, struct grep_source *gs, |
ba8ea749 | 1283 | char *bol, char *end, unsigned lno) |
49de3216 | 1284 | { |
2944e4e6 | 1285 | unsigned cur = lno, from = 1, funcname_lno = 0; |
ba8ea749 RS |
1286 | int funcname_needed = !!opt->funcname; |
1287 | ||
e1327023 | 1288 | if (opt->funcbody && !match_funcname(opt, gs, bol, end)) |
ba8ea749 | 1289 | funcname_needed = 2; |
49de3216 RS |
1290 | |
1291 | if (opt->pre_context < lno) | |
1292 | from = lno - opt->pre_context; | |
1293 | if (from <= opt->last_shown) | |
1294 | from = opt->last_shown + 1; | |
1295 | ||
1296 | /* Rewind. */ | |
e1327023 | 1297 | while (bol > gs->buf && |
ba8ea749 | 1298 | cur > (funcname_needed == 2 ? opt->last_shown + 1 : from)) { |
2944e4e6 RS |
1299 | char *eol = --bol; |
1300 | ||
e1327023 | 1301 | while (bol > gs->buf && bol[-1] != '\n') |
49de3216 RS |
1302 | bol--; |
1303 | cur--; | |
e1327023 | 1304 | if (funcname_needed && match_funcname(opt, gs, bol, eol)) { |
2944e4e6 RS |
1305 | funcname_lno = cur; |
1306 | funcname_needed = 0; | |
1307 | } | |
49de3216 RS |
1308 | } |
1309 | ||
2944e4e6 RS |
1310 | /* We need to look even further back to find a function signature. */ |
1311 | if (opt->funcname && funcname_needed) | |
e1327023 | 1312 | show_funcname_line(opt, gs, bol, cur); |
2944e4e6 | 1313 | |
49de3216 RS |
1314 | /* Back forward. */ |
1315 | while (cur < lno) { | |
2944e4e6 | 1316 | char *eol = bol, sign = (cur == funcname_lno) ? '=' : '-'; |
49de3216 RS |
1317 | |
1318 | while (*eol != '\n') | |
1319 | eol++; | |
e1327023 | 1320 | show_line(opt, bol, eol, gs->name, cur, sign); |
49de3216 RS |
1321 | bol = eol + 1; |
1322 | cur++; | |
1323 | } | |
1324 | } | |
1325 | ||
a26345b6 JH |
1326 | static int should_lookahead(struct grep_opt *opt) |
1327 | { | |
1328 | struct grep_pat *p; | |
1329 | ||
1330 | if (opt->extended) | |
1331 | return 0; /* punt for too complex stuff */ | |
1332 | if (opt->invert) | |
1333 | return 0; | |
1334 | for (p = opt->pattern_list; p; p = p->next) { | |
1335 | if (p->token != GREP_PATTERN) | |
1336 | return 0; /* punt for "header only" and stuff */ | |
1337 | } | |
1338 | return 1; | |
1339 | } | |
1340 | ||
1341 | static int look_ahead(struct grep_opt *opt, | |
1342 | unsigned long *left_p, | |
1343 | unsigned *lno_p, | |
1344 | char **bol_p) | |
1345 | { | |
1346 | unsigned lno = *lno_p; | |
1347 | char *bol = *bol_p; | |
1348 | struct grep_pat *p; | |
1349 | char *sp, *last_bol; | |
1350 | regoff_t earliest = -1; | |
1351 | ||
1352 | for (p = opt->pattern_list; p; p = p->next) { | |
1353 | int hit; | |
1354 | regmatch_t m; | |
1355 | ||
97e77784 | 1356 | hit = patmatch(p, bol, bol + *left_p, &m, 0); |
a26345b6 JH |
1357 | if (!hit || m.rm_so < 0 || m.rm_eo < 0) |
1358 | continue; | |
1359 | if (earliest < 0 || m.rm_so < earliest) | |
1360 | earliest = m.rm_so; | |
1361 | } | |
1362 | ||
1363 | if (earliest < 0) { | |
1364 | *bol_p = bol + *left_p; | |
1365 | *left_p = 0; | |
1366 | return 1; | |
1367 | } | |
1368 | for (sp = bol + earliest; bol < sp && sp[-1] != '\n'; sp--) | |
1369 | ; /* find the beginning of the line */ | |
1370 | last_bol = sp; | |
1371 | ||
1372 | for (sp = bol; sp < last_bol; sp++) { | |
1373 | if (*sp == '\n') | |
1374 | lno++; | |
1375 | } | |
1376 | *left_p -= last_bol - bol; | |
1377 | *bol_p = last_bol; | |
1378 | *lno_p = lno; | |
1379 | return 0; | |
1380 | } | |
1381 | ||
5b594f45 FK |
1382 | static void std_output(struct grep_opt *opt, const void *buf, size_t size) |
1383 | { | |
1384 | fwrite(buf, size, 1, stdout); | |
1385 | } | |
1386 | ||
335ec3bf JK |
1387 | static int fill_textconv_grep(struct userdiff_driver *driver, |
1388 | struct grep_source *gs) | |
1389 | { | |
1390 | struct diff_filespec *df; | |
1391 | char *buf; | |
1392 | size_t size; | |
1393 | ||
1394 | if (!driver || !driver->textconv) | |
1395 | return grep_source_load(gs); | |
1396 | ||
1397 | /* | |
1398 | * The textconv interface is intimately tied to diff_filespecs, so we | |
1399 | * have to pretend to be one. If we could unify the grep_source | |
1400 | * and diff_filespec structs, this mess could just go away. | |
1401 | */ | |
1402 | df = alloc_filespec(gs->path); | |
1403 | switch (gs->type) { | |
1404 | case GREP_SOURCE_SHA1: | |
1405 | fill_filespec(df, gs->identifier, 1, 0100644); | |
1406 | break; | |
1407 | case GREP_SOURCE_FILE: | |
1408 | fill_filespec(df, null_sha1, 0, 0100644); | |
1409 | break; | |
1410 | default: | |
1411 | die("BUG: attempt to textconv something without a path?"); | |
1412 | } | |
1413 | ||
1414 | /* | |
1415 | * fill_textconv is not remotely thread-safe; it may load objects | |
1416 | * behind the scenes, and it modifies the global diff tempfile | |
1417 | * structure. | |
1418 | */ | |
1419 | grep_read_lock(); | |
1420 | size = fill_textconv(driver, df, &buf); | |
1421 | grep_read_unlock(); | |
1422 | free_filespec(df); | |
1423 | ||
1424 | /* | |
1425 | * The normal fill_textconv usage by the diff machinery would just keep | |
1426 | * the textconv'd buf separate from the diff_filespec. But much of the | |
1427 | * grep code passes around a grep_source and assumes that its "buf" | |
1428 | * pointer is the beginning of the thing we are searching. So let's | |
1429 | * install our textconv'd version into the grep_source, taking care not | |
1430 | * to leak any existing buffer. | |
1431 | */ | |
1432 | grep_source_clear_data(gs); | |
1433 | gs->buf = buf; | |
1434 | gs->size = size; | |
1435 | ||
1436 | return 0; | |
1437 | } | |
1438 | ||
4aa2c475 RS |
1439 | static int is_empty_line(const char *bol, const char *eol) |
1440 | { | |
1441 | while (bol < eol && isspace(*bol)) | |
1442 | bol++; | |
1443 | return bol == eol; | |
1444 | } | |
1445 | ||
e1327023 | 1446 | static int grep_source_1(struct grep_opt *opt, struct grep_source *gs, int collect_hits) |
83b5d2f5 | 1447 | { |
e1327023 | 1448 | char *bol; |
4aa2c475 | 1449 | char *peek_bol = NULL; |
e1327023 | 1450 | unsigned long left; |
83b5d2f5 | 1451 | unsigned lno = 1; |
83b5d2f5 | 1452 | unsigned last_hit = 0; |
83b5d2f5 | 1453 | int binary_match_only = 0; |
83b5d2f5 | 1454 | unsigned count = 0; |
a26345b6 | 1455 | int try_lookahead = 0; |
ba8ea749 | 1456 | int show_function = 0; |
335ec3bf | 1457 | struct userdiff_driver *textconv = NULL; |
480c1ca6 | 1458 | enum grep_context ctx = GREP_CONTEXT_HEAD; |
60ecac98 | 1459 | xdemitconf_t xecfg; |
83b5d2f5 | 1460 | |
5b594f45 FK |
1461 | if (!opt->output) |
1462 | opt->output = std_output; | |
1463 | ||
ba8ea749 RS |
1464 | if (opt->pre_context || opt->post_context || opt->file_break || |
1465 | opt->funcbody) { | |
08303c36 RS |
1466 | /* Show hunk marks, except for the first file. */ |
1467 | if (opt->last_shown) | |
1468 | opt->show_hunk_mark = 1; | |
1469 | /* | |
1470 | * If we're using threads then we can't easily identify | |
1471 | * the first file. Always put hunk marks in that case | |
1472 | * and skip the very first one later in work_done(). | |
1473 | */ | |
1474 | if (opt->output != std_output) | |
1475 | opt->show_hunk_mark = 1; | |
1476 | } | |
431d6e7b RS |
1477 | opt->last_shown = 0; |
1478 | ||
335ec3bf JK |
1479 | if (opt->allow_textconv) { |
1480 | grep_source_load_driver(gs); | |
1481 | /* | |
1482 | * We might set up the shared textconv cache data here, which | |
1483 | * is not thread-safe. | |
1484 | */ | |
1485 | grep_attr_lock(); | |
1486 | textconv = userdiff_get_textconv(gs->driver); | |
1487 | grep_attr_unlock(); | |
1488 | } | |
1489 | ||
1490 | /* | |
1491 | * We know the result of a textconv is text, so we only have to care | |
1492 | * about binary handling if we are not using it. | |
1493 | */ | |
1494 | if (!textconv) { | |
1495 | switch (opt->binary) { | |
1496 | case GREP_BINARY_DEFAULT: | |
1497 | if (grep_source_is_binary(gs)) | |
1498 | binary_match_only = 1; | |
1499 | break; | |
1500 | case GREP_BINARY_NOMATCH: | |
1501 | if (grep_source_is_binary(gs)) | |
1502 | return 0; /* Assume unmatch */ | |
1503 | break; | |
1504 | case GREP_BINARY_TEXT: | |
1505 | break; | |
1506 | default: | |
ef1177d1 | 1507 | die("BUG: unknown binary handling mode"); |
335ec3bf | 1508 | } |
83b5d2f5 JH |
1509 | } |
1510 | ||
60ecac98 | 1511 | memset(&xecfg, 0, sizeof(xecfg)); |
0579f91d TR |
1512 | opt->priv = &xecfg; |
1513 | ||
a26345b6 | 1514 | try_lookahead = should_lookahead(opt); |
60ecac98 | 1515 | |
335ec3bf | 1516 | if (fill_textconv_grep(textconv, gs) < 0) |
08265798 JK |
1517 | return 0; |
1518 | ||
e1327023 JK |
1519 | bol = gs->buf; |
1520 | left = gs->size; | |
83b5d2f5 JH |
1521 | while (left) { |
1522 | char *eol, ch; | |
0ab7befa | 1523 | int hit; |
83b5d2f5 | 1524 | |
a26345b6 | 1525 | /* |
8997da38 | 1526 | * look_ahead() skips quickly to the line that possibly |
a26345b6 JH |
1527 | * has the next hit; don't call it if we need to do |
1528 | * something more than just skipping the current line | |
1529 | * in response to an unmatch for the current line. E.g. | |
1530 | * inside a post-context window, we will show the current | |
1531 | * line as a context around the previous hit when it | |
1532 | * doesn't hit. | |
1533 | */ | |
1534 | if (try_lookahead | |
1535 | && !(last_hit | |
ba8ea749 RS |
1536 | && (show_function || |
1537 | lno <= last_hit + opt->post_context)) | |
a26345b6 JH |
1538 | && look_ahead(opt, &left, &lno, &bol)) |
1539 | break; | |
83b5d2f5 JH |
1540 | eol = end_of_line(bol, &left); |
1541 | ch = *eol; | |
1542 | *eol = 0; | |
1543 | ||
480c1ca6 JH |
1544 | if ((ctx == GREP_CONTEXT_HEAD) && (eol == bol)) |
1545 | ctx = GREP_CONTEXT_BODY; | |
1546 | ||
0ab7befa | 1547 | hit = match_line(opt, bol, eol, ctx, collect_hits); |
83b5d2f5 JH |
1548 | *eol = ch; |
1549 | ||
0ab7befa JH |
1550 | if (collect_hits) |
1551 | goto next_line; | |
1552 | ||
83b5d2f5 JH |
1553 | /* "grep -v -e foo -e bla" should list lines |
1554 | * that do not have either, so inversion should | |
1555 | * be done outside. | |
1556 | */ | |
1557 | if (opt->invert) | |
1558 | hit = !hit; | |
1559 | if (opt->unmatch_name_only) { | |
1560 | if (hit) | |
1561 | return 0; | |
1562 | goto next_line; | |
1563 | } | |
1564 | if (hit) { | |
1565 | count++; | |
1566 | if (opt->status_only) | |
1567 | return 1; | |
321ffcc0 | 1568 | if (opt->name_only) { |
e1327023 | 1569 | show_name(opt, gs->name); |
321ffcc0 RS |
1570 | return 1; |
1571 | } | |
c30c10cf RS |
1572 | if (opt->count) |
1573 | goto next_line; | |
83b5d2f5 | 1574 | if (binary_match_only) { |
5b594f45 | 1575 | opt->output(opt, "Binary file ", 12); |
e1327023 | 1576 | output_color(opt, gs->name, strlen(gs->name), |
55f638bd | 1577 | opt->color_filename); |
5b594f45 | 1578 | opt->output(opt, " matches\n", 9); |
83b5d2f5 JH |
1579 | return 1; |
1580 | } | |
83b5d2f5 JH |
1581 | /* Hit at this line. If we haven't shown the |
1582 | * pre-context lines, we would need to show them. | |
83b5d2f5 | 1583 | */ |
ba8ea749 | 1584 | if (opt->pre_context || opt->funcbody) |
e1327023 | 1585 | show_pre_context(opt, gs, bol, eol, lno); |
2944e4e6 | 1586 | else if (opt->funcname) |
e1327023 JK |
1587 | show_funcname_line(opt, gs, bol, lno); |
1588 | show_line(opt, bol, eol, gs->name, lno, ':'); | |
5dd06d38 | 1589 | last_hit = lno; |
ba8ea749 RS |
1590 | if (opt->funcbody) |
1591 | show_function = 1; | |
1592 | goto next_line; | |
83b5d2f5 | 1593 | } |
4aa2c475 RS |
1594 | if (show_function && (!peek_bol || peek_bol < bol)) { |
1595 | unsigned long peek_left = left; | |
1596 | char *peek_eol = eol; | |
1597 | ||
1598 | /* | |
1599 | * Trailing empty lines are not interesting. | |
1600 | * Peek past them to see if they belong to the | |
1601 | * body of the current function. | |
1602 | */ | |
1603 | peek_bol = bol; | |
1604 | while (is_empty_line(peek_bol, peek_eol)) { | |
1605 | peek_bol = peek_eol + 1; | |
1606 | peek_eol = end_of_line(peek_bol, &peek_left); | |
1607 | } | |
1608 | ||
1609 | if (match_funcname(opt, gs, peek_bol, peek_eol)) | |
1610 | show_function = 0; | |
1611 | } | |
ba8ea749 RS |
1612 | if (show_function || |
1613 | (last_hit && lno <= last_hit + opt->post_context)) { | |
83b5d2f5 JH |
1614 | /* If the last hit is within the post context, |
1615 | * we need to show this line. | |
1616 | */ | |
e1327023 | 1617 | show_line(opt, bol, eol, gs->name, lno, '-'); |
83b5d2f5 | 1618 | } |
83b5d2f5 JH |
1619 | |
1620 | next_line: | |
1621 | bol = eol + 1; | |
1622 | if (!left) | |
1623 | break; | |
1624 | left--; | |
1625 | lno++; | |
1626 | } | |
1627 | ||
0ab7befa JH |
1628 | if (collect_hits) |
1629 | return 0; | |
b48fb5b6 | 1630 | |
83b5d2f5 JH |
1631 | if (opt->status_only) |
1632 | return 0; | |
1633 | if (opt->unmatch_name_only) { | |
1634 | /* We did not see any hit, so we want to show this */ | |
e1327023 | 1635 | show_name(opt, gs->name); |
83b5d2f5 JH |
1636 | return 1; |
1637 | } | |
1638 | ||
60ecac98 RS |
1639 | xdiff_clear_find_func(&xecfg); |
1640 | opt->priv = NULL; | |
1641 | ||
83b5d2f5 JH |
1642 | /* NEEDSWORK: |
1643 | * The real "grep -c foo *.c" gives many "bar.c:0" lines, | |
1644 | * which feels mostly useless but sometimes useful. Maybe | |
1645 | * make it another option? For now suppress them. | |
1646 | */ | |
5b594f45 FK |
1647 | if (opt->count && count) { |
1648 | char buf[32]; | |
f76d947a RS |
1649 | if (opt->pathname) { |
1650 | output_color(opt, gs->name, strlen(gs->name), | |
1651 | opt->color_filename); | |
1652 | output_sep(opt, ':'); | |
1653 | } | |
55f638bd | 1654 | snprintf(buf, sizeof(buf), "%u\n", count); |
5b594f45 | 1655 | opt->output(opt, buf, strlen(buf)); |
c30c10cf | 1656 | return 1; |
5b594f45 | 1657 | } |
83b5d2f5 JH |
1658 | return !!last_hit; |
1659 | } | |
1660 | ||
0ab7befa JH |
1661 | static void clr_hit_marker(struct grep_expr *x) |
1662 | { | |
1663 | /* All-hit markers are meaningful only at the very top level | |
1664 | * OR node. | |
1665 | */ | |
1666 | while (1) { | |
1667 | x->hit = 0; | |
1668 | if (x->node != GREP_NODE_OR) | |
1669 | return; | |
1670 | x->u.binary.left->hit = 0; | |
1671 | x = x->u.binary.right; | |
1672 | } | |
1673 | } | |
1674 | ||
1675 | static int chk_hit_marker(struct grep_expr *x) | |
1676 | { | |
1677 | /* Top level nodes have hit markers. See if they all are hits */ | |
1678 | while (1) { | |
1679 | if (x->node != GREP_NODE_OR) | |
1680 | return x->hit; | |
1681 | if (!x->u.binary.left->hit) | |
1682 | return 0; | |
1683 | x = x->u.binary.right; | |
1684 | } | |
1685 | } | |
1686 | ||
e1327023 | 1687 | int grep_source(struct grep_opt *opt, struct grep_source *gs) |
0ab7befa JH |
1688 | { |
1689 | /* | |
1690 | * we do not have to do the two-pass grep when we do not check | |
1691 | * buffer-wide "all-match". | |
1692 | */ | |
1693 | if (!opt->all_match) | |
e1327023 | 1694 | return grep_source_1(opt, gs, 0); |
0ab7befa JH |
1695 | |
1696 | /* Otherwise the toplevel "or" terms hit a bit differently. | |
1697 | * We first clear hit markers from them. | |
1698 | */ | |
1699 | clr_hit_marker(opt->pattern_expression); | |
e1327023 | 1700 | grep_source_1(opt, gs, 1); |
0ab7befa JH |
1701 | |
1702 | if (!chk_hit_marker(opt->pattern_expression)) | |
1703 | return 0; | |
1704 | ||
e1327023 JK |
1705 | return grep_source_1(opt, gs, 0); |
1706 | } | |
1707 | ||
c876d6da | 1708 | int grep_buffer(struct grep_opt *opt, char *buf, unsigned long size) |
e1327023 JK |
1709 | { |
1710 | struct grep_source gs; | |
1711 | int r; | |
1712 | ||
55c61688 | 1713 | grep_source_init(&gs, GREP_SOURCE_BUF, NULL, NULL, NULL); |
e1327023 JK |
1714 | gs.buf = buf; |
1715 | gs.size = size; | |
1716 | ||
1717 | r = grep_source(opt, &gs); | |
1718 | ||
1719 | grep_source_clear(&gs); | |
1720 | return r; | |
1721 | } | |
1722 | ||
1723 | void grep_source_init(struct grep_source *gs, enum grep_source_type type, | |
55c61688 NTND |
1724 | const char *name, const char *path, |
1725 | const void *identifier) | |
e1327023 JK |
1726 | { |
1727 | gs->type = type; | |
8c53f071 JK |
1728 | gs->name = xstrdup_or_null(name); |
1729 | gs->path = xstrdup_or_null(path); | |
e1327023 JK |
1730 | gs->buf = NULL; |
1731 | gs->size = 0; | |
94ad9d9e | 1732 | gs->driver = NULL; |
e1327023 JK |
1733 | |
1734 | switch (type) { | |
1735 | case GREP_SOURCE_FILE: | |
1736 | gs->identifier = xstrdup(identifier); | |
1737 | break; | |
1738 | case GREP_SOURCE_SHA1: | |
1739 | gs->identifier = xmalloc(20); | |
50546b15 | 1740 | hashcpy(gs->identifier, identifier); |
e1327023 JK |
1741 | break; |
1742 | case GREP_SOURCE_BUF: | |
1743 | gs->identifier = NULL; | |
1744 | } | |
1745 | } | |
1746 | ||
1747 | void grep_source_clear(struct grep_source *gs) | |
1748 | { | |
1749 | free(gs->name); | |
1750 | gs->name = NULL; | |
55c61688 NTND |
1751 | free(gs->path); |
1752 | gs->path = NULL; | |
e1327023 JK |
1753 | free(gs->identifier); |
1754 | gs->identifier = NULL; | |
1755 | grep_source_clear_data(gs); | |
1756 | } | |
1757 | ||
1758 | void grep_source_clear_data(struct grep_source *gs) | |
1759 | { | |
1760 | switch (gs->type) { | |
1761 | case GREP_SOURCE_FILE: | |
1762 | case GREP_SOURCE_SHA1: | |
1763 | free(gs->buf); | |
1764 | gs->buf = NULL; | |
1765 | gs->size = 0; | |
1766 | break; | |
1767 | case GREP_SOURCE_BUF: | |
1768 | /* leave user-provided buf intact */ | |
1769 | break; | |
1770 | } | |
1771 | } | |
1772 | ||
1773 | static int grep_source_load_sha1(struct grep_source *gs) | |
1774 | { | |
1775 | enum object_type type; | |
1776 | ||
1777 | grep_read_lock(); | |
1778 | gs->buf = read_sha1_file(gs->identifier, &type, &gs->size); | |
1779 | grep_read_unlock(); | |
1780 | ||
1781 | if (!gs->buf) | |
1782 | return error(_("'%s': unable to read %s"), | |
1783 | gs->name, | |
1784 | sha1_to_hex(gs->identifier)); | |
1785 | return 0; | |
1786 | } | |
1787 | ||
1788 | static int grep_source_load_file(struct grep_source *gs) | |
1789 | { | |
1790 | const char *filename = gs->identifier; | |
1791 | struct stat st; | |
1792 | char *data; | |
1793 | size_t size; | |
1794 | int i; | |
1795 | ||
1796 | if (lstat(filename, &st) < 0) { | |
1797 | err_ret: | |
1798 | if (errno != ENOENT) | |
7645d8f1 | 1799 | error_errno(_("failed to stat '%s'"), filename); |
e1327023 JK |
1800 | return -1; |
1801 | } | |
1802 | if (!S_ISREG(st.st_mode)) | |
1803 | return -1; | |
1804 | size = xsize_t(st.st_size); | |
1805 | i = open(filename, O_RDONLY); | |
1806 | if (i < 0) | |
1807 | goto err_ret; | |
3733e694 | 1808 | data = xmallocz(size); |
e1327023 | 1809 | if (st.st_size != read_in_full(i, data, size)) { |
7645d8f1 | 1810 | error_errno(_("'%s': short read"), filename); |
e1327023 JK |
1811 | close(i); |
1812 | free(data); | |
1813 | return -1; | |
1814 | } | |
1815 | close(i); | |
e1327023 JK |
1816 | |
1817 | gs->buf = data; | |
1818 | gs->size = size; | |
1819 | return 0; | |
1820 | } | |
1821 | ||
3083301e | 1822 | static int grep_source_load(struct grep_source *gs) |
e1327023 JK |
1823 | { |
1824 | if (gs->buf) | |
1825 | return 0; | |
1826 | ||
1827 | switch (gs->type) { | |
1828 | case GREP_SOURCE_FILE: | |
1829 | return grep_source_load_file(gs); | |
1830 | case GREP_SOURCE_SHA1: | |
1831 | return grep_source_load_sha1(gs); | |
1832 | case GREP_SOURCE_BUF: | |
1833 | return gs->buf ? 0 : -1; | |
1834 | } | |
1835 | die("BUG: invalid grep_source type"); | |
0ab7befa | 1836 | } |
94ad9d9e JK |
1837 | |
1838 | void grep_source_load_driver(struct grep_source *gs) | |
1839 | { | |
1840 | if (gs->driver) | |
1841 | return; | |
1842 | ||
1843 | grep_attr_lock(); | |
55c61688 NTND |
1844 | if (gs->path) |
1845 | gs->driver = userdiff_find_by_path(gs->path); | |
94ad9d9e JK |
1846 | if (!gs->driver) |
1847 | gs->driver = userdiff_find_by_name("default"); | |
1848 | grep_attr_unlock(); | |
1849 | } | |
41b59bfc | 1850 | |
3083301e | 1851 | static int grep_source_is_binary(struct grep_source *gs) |
41b59bfc JK |
1852 | { |
1853 | grep_source_load_driver(gs); | |
1854 | if (gs->driver->binary != -1) | |
1855 | return gs->driver->binary; | |
1856 | ||
1857 | if (!grep_source_load(gs)) | |
1858 | return buffer_is_binary(gs->buf, gs->size); | |
1859 | ||
1860 | return 0; | |
1861 | } |