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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 | ||
379642bc BW |
15 | static void std_output(struct grep_opt *opt, const void *buf, size_t size) |
16 | { | |
17 | fwrite(buf, size, 1, stdout); | |
18 | } | |
19 | ||
7687a054 JH |
20 | /* |
21 | * Initialize the grep_defaults template with hardcoded defaults. | |
22 | * We could let the compiler do this, but without C99 initializers | |
23 | * the code gets unwieldy and unreadable, so... | |
24 | */ | |
25 | void init_grep_defaults(void) | |
26 | { | |
27 | struct grep_opt *opt = &grep_defaults; | |
918d4e1c JH |
28 | static int run_once; |
29 | ||
30 | if (run_once) | |
31 | return; | |
32 | run_once++; | |
7687a054 JH |
33 | |
34 | memset(opt, 0, sizeof(*opt)); | |
35 | opt->relative = 1; | |
36 | opt->pathname = 1; | |
37 | opt->regflags = REG_NEWLINE; | |
38 | opt->max_depth = -1; | |
39 | opt->pattern_type_option = GREP_PATTERN_TYPE_UNSPECIFIED; | |
40 | opt->extended_regexp_option = 0; | |
7ce4fb94 JK |
41 | color_set(opt->color_context, ""); |
42 | color_set(opt->color_filename, ""); | |
43 | color_set(opt->color_function, ""); | |
44 | color_set(opt->color_lineno, ""); | |
45 | color_set(opt->color_match_context, GIT_COLOR_BOLD_RED); | |
46 | color_set(opt->color_match_selected, GIT_COLOR_BOLD_RED); | |
47 | color_set(opt->color_selected, ""); | |
48 | color_set(opt->color_sep, GIT_COLOR_CYAN); | |
7687a054 | 49 | opt->color = -1; |
379642bc | 50 | opt->output = std_output; |
7687a054 JH |
51 | } |
52 | ||
53 | static int parse_pattern_type_arg(const char *opt, const char *arg) | |
54 | { | |
55 | if (!strcmp(arg, "default")) | |
56 | return GREP_PATTERN_TYPE_UNSPECIFIED; | |
57 | else if (!strcmp(arg, "basic")) | |
58 | return GREP_PATTERN_TYPE_BRE; | |
59 | else if (!strcmp(arg, "extended")) | |
60 | return GREP_PATTERN_TYPE_ERE; | |
61 | else if (!strcmp(arg, "fixed")) | |
62 | return GREP_PATTERN_TYPE_FIXED; | |
63 | else if (!strcmp(arg, "perl")) | |
64 | return GREP_PATTERN_TYPE_PCRE; | |
65 | die("bad %s argument: %s", opt, arg); | |
66 | } | |
67 | ||
68 | /* | |
69 | * Read the configuration file once and store it in | |
70 | * the grep_defaults template. | |
71 | */ | |
72 | int grep_config(const char *var, const char *value, void *cb) | |
73 | { | |
74 | struct grep_opt *opt = &grep_defaults; | |
75 | char *color = NULL; | |
76 | ||
77 | if (userdiff_config(var, value) < 0) | |
78 | return -1; | |
79 | ||
80 | if (!strcmp(var, "grep.extendedregexp")) { | |
81 | if (git_config_bool(var, value)) | |
82 | opt->extended_regexp_option = 1; | |
83 | else | |
84 | opt->extended_regexp_option = 0; | |
85 | return 0; | |
86 | } | |
87 | ||
88 | if (!strcmp(var, "grep.patterntype")) { | |
89 | opt->pattern_type_option = parse_pattern_type_arg(var, value); | |
90 | return 0; | |
91 | } | |
92 | ||
93 | if (!strcmp(var, "grep.linenumber")) { | |
94 | opt->linenum = git_config_bool(var, value); | |
95 | return 0; | |
96 | } | |
97 | ||
6453f7b3 AS |
98 | if (!strcmp(var, "grep.fullname")) { |
99 | opt->relative = !git_config_bool(var, value); | |
100 | return 0; | |
101 | } | |
102 | ||
7687a054 JH |
103 | if (!strcmp(var, "color.grep")) |
104 | opt->color = git_config_colorbool(var, value); | |
105 | else if (!strcmp(var, "color.grep.context")) | |
106 | color = opt->color_context; | |
107 | else if (!strcmp(var, "color.grep.filename")) | |
108 | color = opt->color_filename; | |
109 | else if (!strcmp(var, "color.grep.function")) | |
110 | color = opt->color_function; | |
111 | else if (!strcmp(var, "color.grep.linenumber")) | |
112 | color = opt->color_lineno; | |
79a77109 RS |
113 | else if (!strcmp(var, "color.grep.matchcontext")) |
114 | color = opt->color_match_context; | |
115 | else if (!strcmp(var, "color.grep.matchselected")) | |
116 | color = opt->color_match_selected; | |
7687a054 JH |
117 | else if (!strcmp(var, "color.grep.selected")) |
118 | color = opt->color_selected; | |
119 | else if (!strcmp(var, "color.grep.separator")) | |
120 | color = opt->color_sep; | |
79a77109 RS |
121 | else if (!strcmp(var, "color.grep.match")) { |
122 | int rc = 0; | |
123 | if (!value) | |
124 | return config_error_nonbool(var); | |
bf1f639e JH |
125 | rc |= color_parse(value, opt->color_match_context); |
126 | rc |= color_parse(value, opt->color_match_selected); | |
79a77109 RS |
127 | return rc; |
128 | } | |
7687a054 JH |
129 | |
130 | if (color) { | |
131 | if (!value) | |
132 | return config_error_nonbool(var); | |
f6c5a296 | 133 | return color_parse(value, color); |
7687a054 JH |
134 | } |
135 | return 0; | |
136 | } | |
137 | ||
138 | /* | |
139 | * Initialize one instance of grep_opt and copy the | |
140 | * default values from the template we read the configuration | |
141 | * information in an earlier call to git_config(grep_config). | |
142 | */ | |
143 | void grep_init(struct grep_opt *opt, const char *prefix) | |
144 | { | |
145 | struct grep_opt *def = &grep_defaults; | |
146 | ||
147 | memset(opt, 0, sizeof(*opt)); | |
148 | opt->prefix = prefix; | |
149 | opt->prefix_length = (prefix && *prefix) ? strlen(prefix) : 0; | |
150 | opt->pattern_tail = &opt->pattern_list; | |
151 | opt->header_tail = &opt->header_list; | |
152 | ||
153 | opt->color = def->color; | |
154 | opt->extended_regexp_option = def->extended_regexp_option; | |
155 | opt->pattern_type_option = def->pattern_type_option; | |
156 | opt->linenum = def->linenum; | |
157 | opt->max_depth = def->max_depth; | |
158 | opt->pathname = def->pathname; | |
159 | opt->regflags = def->regflags; | |
160 | opt->relative = def->relative; | |
379642bc | 161 | opt->output = def->output; |
7687a054 | 162 | |
7ce4fb94 JK |
163 | color_set(opt->color_context, def->color_context); |
164 | color_set(opt->color_filename, def->color_filename); | |
165 | color_set(opt->color_function, def->color_function); | |
166 | color_set(opt->color_lineno, def->color_lineno); | |
167 | color_set(opt->color_match_context, def->color_match_context); | |
168 | color_set(opt->color_match_selected, def->color_match_selected); | |
169 | color_set(opt->color_selected, def->color_selected); | |
170 | color_set(opt->color_sep, def->color_sep); | |
7687a054 | 171 | } |
07a7d656 | 172 | |
8465541e | 173 | static void grep_set_pattern_type_option(enum grep_pattern_type pattern_type, struct grep_opt *opt) |
c5c31d33 JH |
174 | { |
175 | switch (pattern_type) { | |
176 | case GREP_PATTERN_TYPE_UNSPECIFIED: | |
177 | /* fall through */ | |
178 | ||
179 | case GREP_PATTERN_TYPE_BRE: | |
180 | opt->fixed = 0; | |
181 | opt->pcre = 0; | |
182 | opt->regflags &= ~REG_EXTENDED; | |
183 | break; | |
184 | ||
185 | case GREP_PATTERN_TYPE_ERE: | |
186 | opt->fixed = 0; | |
187 | opt->pcre = 0; | |
188 | opt->regflags |= REG_EXTENDED; | |
189 | break; | |
190 | ||
191 | case GREP_PATTERN_TYPE_FIXED: | |
192 | opt->fixed = 1; | |
193 | opt->pcre = 0; | |
194 | opt->regflags &= ~REG_EXTENDED; | |
195 | break; | |
196 | ||
197 | case GREP_PATTERN_TYPE_PCRE: | |
198 | opt->fixed = 0; | |
199 | opt->pcre = 1; | |
200 | opt->regflags &= ~REG_EXTENDED; | |
201 | break; | |
202 | } | |
203 | } | |
204 | ||
8465541e JH |
205 | void grep_commit_pattern_type(enum grep_pattern_type pattern_type, struct grep_opt *opt) |
206 | { | |
207 | if (pattern_type != GREP_PATTERN_TYPE_UNSPECIFIED) | |
208 | grep_set_pattern_type_option(pattern_type, opt); | |
209 | else if (opt->pattern_type_option != GREP_PATTERN_TYPE_UNSPECIFIED) | |
210 | grep_set_pattern_type_option(opt->pattern_type_option, opt); | |
211 | else if (opt->extended_regexp_option) | |
212 | grep_set_pattern_type_option(GREP_PATTERN_TYPE_ERE, opt); | |
213 | } | |
214 | ||
fc456751 RS |
215 | static struct grep_pat *create_grep_pat(const char *pat, size_t patlen, |
216 | const char *origin, int no, | |
217 | enum grep_pat_token t, | |
218 | enum grep_header_field field) | |
a4d7d2c6 JH |
219 | { |
220 | struct grep_pat *p = xcalloc(1, sizeof(*p)); | |
526a858a | 221 | p->pattern = xmemdupz(pat, patlen); |
fc456751 RS |
222 | p->patternlen = patlen; |
223 | p->origin = origin; | |
224 | p->no = no; | |
225 | p->token = t; | |
a4d7d2c6 | 226 | p->field = field; |
fc456751 RS |
227 | return p; |
228 | } | |
229 | ||
2b3873ff RS |
230 | static void do_append_grep_pat(struct grep_pat ***tail, struct grep_pat *p) |
231 | { | |
232 | **tail = p; | |
233 | *tail = &p->next; | |
a4d7d2c6 | 234 | p->next = NULL; |
526a858a RS |
235 | |
236 | switch (p->token) { | |
237 | case GREP_PATTERN: /* atom */ | |
238 | case GREP_PATTERN_HEAD: | |
239 | case GREP_PATTERN_BODY: | |
240 | for (;;) { | |
241 | struct grep_pat *new_pat; | |
242 | size_t len = 0; | |
243 | char *cp = p->pattern + p->patternlen, *nl = NULL; | |
244 | while (++len <= p->patternlen) { | |
245 | if (*(--cp) == '\n') { | |
246 | nl = cp; | |
247 | break; | |
248 | } | |
249 | } | |
250 | if (!nl) | |
251 | break; | |
252 | new_pat = create_grep_pat(nl + 1, len - 1, p->origin, | |
253 | p->no, p->token, p->field); | |
254 | new_pat->next = p->next; | |
255 | if (!p->next) | |
256 | *tail = &new_pat->next; | |
257 | p->next = new_pat; | |
258 | *nl = '\0'; | |
259 | p->patternlen -= len; | |
260 | } | |
261 | break; | |
262 | default: | |
263 | break; | |
264 | } | |
2b3873ff RS |
265 | } |
266 | ||
fc456751 RS |
267 | void append_header_grep_pattern(struct grep_opt *opt, |
268 | enum grep_header_field field, const char *pat) | |
269 | { | |
270 | struct grep_pat *p = create_grep_pat(pat, strlen(pat), "header", 0, | |
271 | GREP_PATTERN_HEAD, field); | |
baa6378f JH |
272 | if (field == GREP_HEADER_REFLOG) |
273 | opt->use_reflog_filter = 1; | |
2b3873ff | 274 | do_append_grep_pat(&opt->header_tail, p); |
a4d7d2c6 JH |
275 | } |
276 | ||
83b5d2f5 JH |
277 | void append_grep_pattern(struct grep_opt *opt, const char *pat, |
278 | const char *origin, int no, enum grep_pat_token t) | |
ed40a095 RS |
279 | { |
280 | append_grep_pat(opt, pat, strlen(pat), origin, no, t); | |
281 | } | |
282 | ||
283 | void append_grep_pat(struct grep_opt *opt, const char *pat, size_t patlen, | |
284 | const char *origin, int no, enum grep_pat_token t) | |
83b5d2f5 | 285 | { |
fc456751 | 286 | struct grep_pat *p = create_grep_pat(pat, patlen, origin, no, t, 0); |
2b3873ff | 287 | do_append_grep_pat(&opt->pattern_tail, p); |
83b5d2f5 JH |
288 | } |
289 | ||
5b594f45 FK |
290 | struct grep_opt *grep_opt_dup(const struct grep_opt *opt) |
291 | { | |
292 | struct grep_pat *pat; | |
293 | struct grep_opt *ret = xmalloc(sizeof(struct grep_opt)); | |
294 | *ret = *opt; | |
295 | ||
296 | ret->pattern_list = NULL; | |
297 | ret->pattern_tail = &ret->pattern_list; | |
298 | ||
299 | for(pat = opt->pattern_list; pat != NULL; pat = pat->next) | |
300 | { | |
301 | if(pat->token == GREP_PATTERN_HEAD) | |
302 | append_header_grep_pattern(ret, pat->field, | |
303 | pat->pattern); | |
304 | else | |
ed40a095 RS |
305 | append_grep_pat(ret, pat->pattern, pat->patternlen, |
306 | pat->origin, pat->no, pat->token); | |
5b594f45 FK |
307 | } |
308 | ||
309 | return ret; | |
310 | } | |
311 | ||
a30c148a MK |
312 | static NORETURN void compile_regexp_failed(const struct grep_pat *p, |
313 | const char *error) | |
314 | { | |
315 | char where[1024]; | |
316 | ||
317 | if (p->no) | |
19bdd3e7 | 318 | xsnprintf(where, sizeof(where), "In '%s' at %d, ", p->origin, p->no); |
a30c148a | 319 | else if (p->origin) |
19bdd3e7 | 320 | xsnprintf(where, sizeof(where), "%s, ", p->origin); |
a30c148a MK |
321 | else |
322 | where[0] = 0; | |
323 | ||
324 | die("%s'%s': %s", where, p->pattern, error); | |
325 | } | |
326 | ||
63e7e9d8 MK |
327 | #ifdef USE_LIBPCRE |
328 | static void compile_pcre_regexp(struct grep_pat *p, const struct grep_opt *opt) | |
329 | { | |
330 | const char *error; | |
331 | int erroffset; | |
fba4f125 | 332 | int options = PCRE_MULTILINE; |
63e7e9d8 | 333 | |
9d9babb8 NTND |
334 | if (opt->ignore_case) { |
335 | if (has_non_ascii(p->pattern)) | |
336 | p->pcre_tables = pcre_maketables(); | |
63e7e9d8 | 337 | options |= PCRE_CASELESS; |
9d9babb8 | 338 | } |
18547aac NTND |
339 | if (is_utf8_locale() && has_non_ascii(p->pattern)) |
340 | options |= PCRE_UTF8; | |
63e7e9d8 MK |
341 | |
342 | p->pcre_regexp = pcre_compile(p->pattern, options, &error, &erroffset, | |
9d9babb8 | 343 | p->pcre_tables); |
63e7e9d8 MK |
344 | if (!p->pcre_regexp) |
345 | compile_regexp_failed(p, error); | |
346 | ||
347 | p->pcre_extra_info = pcre_study(p->pcre_regexp, 0, &error); | |
348 | if (!p->pcre_extra_info && error) | |
349 | die("%s", error); | |
350 | } | |
351 | ||
352 | static int pcrematch(struct grep_pat *p, const char *line, const char *eol, | |
353 | regmatch_t *match, int eflags) | |
354 | { | |
355 | int ovector[30], ret, flags = 0; | |
356 | ||
357 | if (eflags & REG_NOTBOL) | |
358 | flags |= PCRE_NOTBOL; | |
359 | ||
360 | ret = pcre_exec(p->pcre_regexp, p->pcre_extra_info, line, eol - line, | |
361 | 0, flags, ovector, ARRAY_SIZE(ovector)); | |
362 | if (ret < 0 && ret != PCRE_ERROR_NOMATCH) | |
363 | die("pcre_exec failed with error code %d", ret); | |
364 | if (ret > 0) { | |
365 | ret = 0; | |
366 | match->rm_so = ovector[0]; | |
367 | match->rm_eo = ovector[1]; | |
368 | } | |
369 | ||
370 | return ret; | |
371 | } | |
372 | ||
373 | static void free_pcre_regexp(struct grep_pat *p) | |
374 | { | |
375 | pcre_free(p->pcre_regexp); | |
376 | pcre_free(p->pcre_extra_info); | |
9d9babb8 | 377 | pcre_free((void *)p->pcre_tables); |
63e7e9d8 MK |
378 | } |
379 | #else /* !USE_LIBPCRE */ | |
380 | static void compile_pcre_regexp(struct grep_pat *p, const struct grep_opt *opt) | |
381 | { | |
382 | die("cannot use Perl-compatible regexes when not compiled with USE_LIBPCRE"); | |
383 | } | |
384 | ||
385 | static int pcrematch(struct grep_pat *p, const char *line, const char *eol, | |
386 | regmatch_t *match, int eflags) | |
387 | { | |
388 | return 1; | |
389 | } | |
390 | ||
391 | static void free_pcre_regexp(struct grep_pat *p) | |
392 | { | |
393 | } | |
394 | #endif /* !USE_LIBPCRE */ | |
395 | ||
9eceddee FK |
396 | static int is_fixed(const char *s, size_t len) |
397 | { | |
398 | size_t i; | |
399 | ||
400 | /* regcomp cannot accept patterns with NULs so we | |
401 | * consider any pattern containing a NUL fixed. | |
402 | */ | |
403 | if (memchr(s, 0, len)) | |
404 | return 1; | |
405 | ||
406 | for (i = 0; i < len; i++) { | |
407 | if (is_regex_special(s[i])) | |
408 | return 0; | |
409 | } | |
410 | ||
411 | return 1; | |
412 | } | |
413 | ||
793dc676 NTND |
414 | static void compile_fixed_regexp(struct grep_pat *p, struct grep_opt *opt) |
415 | { | |
416 | struct strbuf sb = STRBUF_INIT; | |
417 | int err; | |
418 | int regflags; | |
419 | ||
420 | basic_regex_quote_buf(&sb, p->pattern); | |
421 | regflags = opt->regflags & ~REG_EXTENDED; | |
422 | if (opt->ignore_case) | |
423 | regflags |= REG_ICASE; | |
424 | err = regcomp(&p->regexp, sb.buf, regflags); | |
425 | if (opt->debug) | |
426 | fprintf(stderr, "fixed %s\n", sb.buf); | |
427 | strbuf_release(&sb); | |
428 | if (err) { | |
429 | char errbuf[1024]; | |
430 | regerror(err, &p->regexp, errbuf, sizeof(errbuf)); | |
431 | regfree(&p->regexp); | |
432 | compile_regexp_failed(p, errbuf); | |
433 | } | |
434 | } | |
435 | ||
83b5d2f5 JH |
436 | static void compile_regexp(struct grep_pat *p, struct grep_opt *opt) |
437 | { | |
5c1ebcca | 438 | int icase, ascii_only; |
c822255c RS |
439 | int err; |
440 | ||
d7eb527d | 441 | p->word_regexp = opt->word_regexp; |
5183bf67 | 442 | p->ignore_case = opt->ignore_case; |
5c1ebcca NTND |
443 | icase = opt->regflags & REG_ICASE || p->ignore_case; |
444 | ascii_only = !has_non_ascii(p->pattern); | |
d7eb527d | 445 | |
793dc676 NTND |
446 | /* |
447 | * Even when -F (fixed) asks us to do a non-regexp search, we | |
448 | * may not be able to correctly case-fold when -i | |
449 | * (ignore-case) is asked (in which case, we'll synthesize a | |
450 | * regexp to match the pattern that matches regexp special | |
451 | * characters literally, while ignoring case differences). On | |
452 | * the other hand, even without -F, if the pattern does not | |
453 | * have any regexp special characters and there is no need for | |
454 | * case-folding search, we can internally turn it into a | |
455 | * simple string match using kws. p->fixed tells us if we | |
456 | * want to use kws. | |
457 | */ | |
9eceddee | 458 | if (opt->fixed || is_fixed(p->pattern, p->patternlen)) |
793dc676 | 459 | p->fixed = !icase || ascii_only; |
9eceddee FK |
460 | else |
461 | p->fixed = 0; | |
462 | ||
463 | if (p->fixed) { | |
695f95ba | 464 | p->kws = kwsalloc(icase ? tolower_trans_tbl : NULL); |
9eceddee FK |
465 | kwsincr(p->kws, p->pattern, p->patternlen); |
466 | kwsprep(p->kws); | |
c822255c | 467 | return; |
793dc676 NTND |
468 | } else if (opt->fixed) { |
469 | /* | |
470 | * We come here when the pattern has the non-ascii | |
471 | * characters we cannot case-fold, and asked to | |
472 | * ignore-case. | |
473 | */ | |
474 | compile_fixed_regexp(p, opt); | |
475 | return; | |
9eceddee | 476 | } |
c822255c | 477 | |
63e7e9d8 MK |
478 | if (opt->pcre) { |
479 | compile_pcre_regexp(p, opt); | |
480 | return; | |
481 | } | |
482 | ||
c822255c | 483 | err = regcomp(&p->regexp, p->pattern, opt->regflags); |
83b5d2f5 JH |
484 | if (err) { |
485 | char errbuf[1024]; | |
83b5d2f5 JH |
486 | regerror(err, &p->regexp, errbuf, 1024); |
487 | regfree(&p->regexp); | |
a30c148a | 488 | compile_regexp_failed(p, errbuf); |
83b5d2f5 JH |
489 | } |
490 | } | |
491 | ||
0ab7befa | 492 | static struct grep_expr *compile_pattern_or(struct grep_pat **); |
83b5d2f5 JH |
493 | static struct grep_expr *compile_pattern_atom(struct grep_pat **list) |
494 | { | |
495 | struct grep_pat *p; | |
496 | struct grep_expr *x; | |
497 | ||
498 | p = *list; | |
c922b01f LT |
499 | if (!p) |
500 | return NULL; | |
83b5d2f5 JH |
501 | switch (p->token) { |
502 | case GREP_PATTERN: /* atom */ | |
480c1ca6 JH |
503 | case GREP_PATTERN_HEAD: |
504 | case GREP_PATTERN_BODY: | |
83b5d2f5 JH |
505 | x = xcalloc(1, sizeof (struct grep_expr)); |
506 | x->node = GREP_NODE_ATOM; | |
507 | x->u.atom = p; | |
508 | *list = p->next; | |
509 | return x; | |
510 | case GREP_OPEN_PAREN: | |
511 | *list = p->next; | |
0ab7befa | 512 | x = compile_pattern_or(list); |
83b5d2f5 JH |
513 | if (!*list || (*list)->token != GREP_CLOSE_PAREN) |
514 | die("unmatched parenthesis"); | |
515 | *list = (*list)->next; | |
516 | return x; | |
517 | default: | |
518 | return NULL; | |
519 | } | |
520 | } | |
521 | ||
522 | static struct grep_expr *compile_pattern_not(struct grep_pat **list) | |
523 | { | |
524 | struct grep_pat *p; | |
525 | struct grep_expr *x; | |
526 | ||
527 | p = *list; | |
c922b01f LT |
528 | if (!p) |
529 | return NULL; | |
83b5d2f5 JH |
530 | switch (p->token) { |
531 | case GREP_NOT: | |
532 | if (!p->next) | |
533 | die("--not not followed by pattern expression"); | |
534 | *list = p->next; | |
535 | x = xcalloc(1, sizeof (struct grep_expr)); | |
536 | x->node = GREP_NODE_NOT; | |
537 | x->u.unary = compile_pattern_not(list); | |
538 | if (!x->u.unary) | |
539 | die("--not followed by non pattern expression"); | |
540 | return x; | |
541 | default: | |
542 | return compile_pattern_atom(list); | |
543 | } | |
544 | } | |
545 | ||
546 | static struct grep_expr *compile_pattern_and(struct grep_pat **list) | |
547 | { | |
548 | struct grep_pat *p; | |
549 | struct grep_expr *x, *y, *z; | |
550 | ||
551 | x = compile_pattern_not(list); | |
552 | p = *list; | |
553 | if (p && p->token == GREP_AND) { | |
554 | if (!p->next) | |
555 | die("--and not followed by pattern expression"); | |
556 | *list = p->next; | |
557 | y = compile_pattern_and(list); | |
558 | if (!y) | |
559 | die("--and not followed by pattern expression"); | |
560 | z = xcalloc(1, sizeof (struct grep_expr)); | |
561 | z->node = GREP_NODE_AND; | |
562 | z->u.binary.left = x; | |
563 | z->u.binary.right = y; | |
564 | return z; | |
565 | } | |
566 | return x; | |
567 | } | |
568 | ||
569 | static struct grep_expr *compile_pattern_or(struct grep_pat **list) | |
570 | { | |
571 | struct grep_pat *p; | |
572 | struct grep_expr *x, *y, *z; | |
573 | ||
574 | x = compile_pattern_and(list); | |
575 | p = *list; | |
576 | if (x && p && p->token != GREP_CLOSE_PAREN) { | |
577 | y = compile_pattern_or(list); | |
578 | if (!y) | |
579 | die("not a pattern expression %s", p->pattern); | |
580 | z = xcalloc(1, sizeof (struct grep_expr)); | |
581 | z->node = GREP_NODE_OR; | |
582 | z->u.binary.left = x; | |
583 | z->u.binary.right = y; | |
584 | return z; | |
585 | } | |
586 | return x; | |
587 | } | |
588 | ||
589 | static struct grep_expr *compile_pattern_expr(struct grep_pat **list) | |
590 | { | |
591 | return compile_pattern_or(list); | |
592 | } | |
593 | ||
17bf35a3 JH |
594 | static void indent(int in) |
595 | { | |
596 | while (in-- > 0) | |
597 | fputc(' ', stderr); | |
598 | } | |
599 | ||
600 | static void dump_grep_pat(struct grep_pat *p) | |
601 | { | |
602 | switch (p->token) { | |
603 | case GREP_AND: fprintf(stderr, "*and*"); break; | |
604 | case GREP_OPEN_PAREN: fprintf(stderr, "*(*"); break; | |
605 | case GREP_CLOSE_PAREN: fprintf(stderr, "*)*"); break; | |
606 | case GREP_NOT: fprintf(stderr, "*not*"); break; | |
607 | case GREP_OR: fprintf(stderr, "*or*"); break; | |
608 | ||
609 | case GREP_PATTERN: fprintf(stderr, "pattern"); break; | |
610 | case GREP_PATTERN_HEAD: fprintf(stderr, "pattern_head"); break; | |
611 | case GREP_PATTERN_BODY: fprintf(stderr, "pattern_body"); break; | |
612 | } | |
613 | ||
614 | switch (p->token) { | |
615 | default: break; | |
616 | case GREP_PATTERN_HEAD: | |
617 | fprintf(stderr, "<head %d>", p->field); break; | |
618 | case GREP_PATTERN_BODY: | |
619 | fprintf(stderr, "<body>"); break; | |
620 | } | |
621 | switch (p->token) { | |
622 | default: break; | |
623 | case GREP_PATTERN_HEAD: | |
624 | case GREP_PATTERN_BODY: | |
625 | case GREP_PATTERN: | |
626 | fprintf(stderr, "%.*s", (int)p->patternlen, p->pattern); | |
627 | break; | |
628 | } | |
629 | fputc('\n', stderr); | |
630 | } | |
631 | ||
632 | static void dump_grep_expression_1(struct grep_expr *x, int in) | |
633 | { | |
634 | indent(in); | |
635 | switch (x->node) { | |
636 | case GREP_NODE_TRUE: | |
637 | fprintf(stderr, "true\n"); | |
638 | break; | |
639 | case GREP_NODE_ATOM: | |
640 | dump_grep_pat(x->u.atom); | |
641 | break; | |
642 | case GREP_NODE_NOT: | |
643 | fprintf(stderr, "(not\n"); | |
644 | dump_grep_expression_1(x->u.unary, in+1); | |
645 | indent(in); | |
646 | fprintf(stderr, ")\n"); | |
647 | break; | |
648 | case GREP_NODE_AND: | |
649 | fprintf(stderr, "(and\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 | case GREP_NODE_OR: | |
656 | fprintf(stderr, "(or\n"); | |
657 | dump_grep_expression_1(x->u.binary.left, in+1); | |
658 | dump_grep_expression_1(x->u.binary.right, in+1); | |
659 | indent(in); | |
660 | fprintf(stderr, ")\n"); | |
661 | break; | |
662 | } | |
663 | } | |
664 | ||
07a7d656 | 665 | static void dump_grep_expression(struct grep_opt *opt) |
17bf35a3 JH |
666 | { |
667 | struct grep_expr *x = opt->pattern_expression; | |
668 | ||
669 | if (opt->all_match) | |
670 | fprintf(stderr, "[all-match]\n"); | |
671 | dump_grep_expression_1(x, 0); | |
672 | fflush(NULL); | |
673 | } | |
674 | ||
5aaeb733 JH |
675 | static struct grep_expr *grep_true_expr(void) |
676 | { | |
677 | struct grep_expr *z = xcalloc(1, sizeof(*z)); | |
678 | z->node = GREP_NODE_TRUE; | |
679 | return z; | |
680 | } | |
681 | ||
682 | static struct grep_expr *grep_or_expr(struct grep_expr *left, struct grep_expr *right) | |
683 | { | |
684 | struct grep_expr *z = xcalloc(1, sizeof(*z)); | |
685 | z->node = GREP_NODE_OR; | |
686 | z->u.binary.left = left; | |
687 | z->u.binary.right = right; | |
688 | return z; | |
689 | } | |
690 | ||
95ce9ce2 | 691 | static struct grep_expr *prep_header_patterns(struct grep_opt *opt) |
83b5d2f5 JH |
692 | { |
693 | struct grep_pat *p; | |
95ce9ce2 | 694 | struct grep_expr *header_expr; |
5aaeb733 JH |
695 | struct grep_expr *(header_group[GREP_HEADER_FIELD_MAX]); |
696 | enum grep_header_field fld; | |
83b5d2f5 | 697 | |
95ce9ce2 JH |
698 | if (!opt->header_list) |
699 | return NULL; | |
2385f246 | 700 | |
95ce9ce2 JH |
701 | for (p = opt->header_list; p; p = p->next) { |
702 | if (p->token != GREP_PATTERN_HEAD) | |
ef1177d1 | 703 | die("BUG: a non-header pattern in grep header list."); |
3ce3ffb8 AP |
704 | if (p->field < GREP_HEADER_FIELD_MIN || |
705 | GREP_HEADER_FIELD_MAX <= p->field) | |
ef1177d1 | 706 | die("BUG: unknown header field %d", p->field); |
95ce9ce2 | 707 | compile_regexp(p, opt); |
80235ba7 | 708 | } |
5aaeb733 JH |
709 | |
710 | for (fld = 0; fld < GREP_HEADER_FIELD_MAX; fld++) | |
711 | header_group[fld] = NULL; | |
712 | ||
713 | for (p = opt->header_list; p; p = p->next) { | |
714 | struct grep_expr *h; | |
715 | struct grep_pat *pp = p; | |
716 | ||
717 | h = compile_pattern_atom(&pp); | |
718 | if (!h || pp != p->next) | |
ef1177d1 | 719 | die("BUG: malformed header expr"); |
5aaeb733 JH |
720 | if (!header_group[p->field]) { |
721 | header_group[p->field] = h; | |
722 | continue; | |
723 | } | |
724 | header_group[p->field] = grep_or_expr(h, header_group[p->field]); | |
725 | } | |
726 | ||
727 | header_expr = NULL; | |
728 | ||
729 | for (fld = 0; fld < GREP_HEADER_FIELD_MAX; fld++) { | |
730 | if (!header_group[fld]) | |
731 | continue; | |
732 | if (!header_expr) | |
733 | header_expr = grep_true_expr(); | |
734 | header_expr = grep_or_expr(header_group[fld], header_expr); | |
735 | } | |
95ce9ce2 JH |
736 | return header_expr; |
737 | } | |
738 | ||
13e4fc7e JH |
739 | static struct grep_expr *grep_splice_or(struct grep_expr *x, struct grep_expr *y) |
740 | { | |
741 | struct grep_expr *z = x; | |
742 | ||
743 | while (x) { | |
744 | assert(x->node == GREP_NODE_OR); | |
745 | if (x->u.binary.right && | |
746 | x->u.binary.right->node == GREP_NODE_TRUE) { | |
747 | x->u.binary.right = y; | |
748 | break; | |
749 | } | |
750 | x = x->u.binary.right; | |
751 | } | |
752 | return z; | |
753 | } | |
754 | ||
17bf35a3 | 755 | static void compile_grep_patterns_real(struct grep_opt *opt) |
95ce9ce2 JH |
756 | { |
757 | struct grep_pat *p; | |
758 | struct grep_expr *header_expr = prep_header_patterns(opt); | |
0ab7befa | 759 | |
83b5d2f5 | 760 | for (p = opt->pattern_list; p; p = p->next) { |
480c1ca6 JH |
761 | switch (p->token) { |
762 | case GREP_PATTERN: /* atom */ | |
763 | case GREP_PATTERN_HEAD: | |
764 | case GREP_PATTERN_BODY: | |
c822255c | 765 | compile_regexp(p, opt); |
480c1ca6 JH |
766 | break; |
767 | default: | |
83b5d2f5 | 768 | opt->extended = 1; |
480c1ca6 JH |
769 | break; |
770 | } | |
83b5d2f5 JH |
771 | } |
772 | ||
80235ba7 JH |
773 | if (opt->all_match || header_expr) |
774 | opt->extended = 1; | |
17bf35a3 | 775 | else if (!opt->extended && !opt->debug) |
83b5d2f5 JH |
776 | return; |
777 | ||
83b5d2f5 | 778 | p = opt->pattern_list; |
ba150a3f MB |
779 | if (p) |
780 | opt->pattern_expression = compile_pattern_expr(&p); | |
83b5d2f5 JH |
781 | if (p) |
782 | die("incomplete pattern expression: %s", p->pattern); | |
80235ba7 JH |
783 | |
784 | if (!header_expr) | |
785 | return; | |
786 | ||
5aaeb733 | 787 | if (!opt->pattern_expression) |
80235ba7 | 788 | opt->pattern_expression = header_expr; |
13e4fc7e JH |
789 | else if (opt->all_match) |
790 | opt->pattern_expression = grep_splice_or(header_expr, | |
791 | opt->pattern_expression); | |
5aaeb733 JH |
792 | else |
793 | opt->pattern_expression = grep_or_expr(opt->pattern_expression, | |
794 | header_expr); | |
80235ba7 | 795 | opt->all_match = 1; |
83b5d2f5 JH |
796 | } |
797 | ||
17bf35a3 JH |
798 | void compile_grep_patterns(struct grep_opt *opt) |
799 | { | |
800 | compile_grep_patterns_real(opt); | |
801 | if (opt->debug) | |
802 | dump_grep_expression(opt); | |
803 | } | |
804 | ||
b48fb5b6 JH |
805 | static void free_pattern_expr(struct grep_expr *x) |
806 | { | |
807 | switch (x->node) { | |
5aaeb733 | 808 | case GREP_NODE_TRUE: |
b48fb5b6 JH |
809 | case GREP_NODE_ATOM: |
810 | break; | |
811 | case GREP_NODE_NOT: | |
812 | free_pattern_expr(x->u.unary); | |
813 | break; | |
814 | case GREP_NODE_AND: | |
815 | case GREP_NODE_OR: | |
816 | free_pattern_expr(x->u.binary.left); | |
817 | free_pattern_expr(x->u.binary.right); | |
818 | break; | |
819 | } | |
820 | free(x); | |
821 | } | |
822 | ||
823 | void free_grep_patterns(struct grep_opt *opt) | |
824 | { | |
825 | struct grep_pat *p, *n; | |
826 | ||
827 | for (p = opt->pattern_list; p; p = n) { | |
828 | n = p->next; | |
829 | switch (p->token) { | |
830 | case GREP_PATTERN: /* atom */ | |
831 | case GREP_PATTERN_HEAD: | |
832 | case GREP_PATTERN_BODY: | |
9eceddee FK |
833 | if (p->kws) |
834 | kwsfree(p->kws); | |
835 | else if (p->pcre_regexp) | |
63e7e9d8 MK |
836 | free_pcre_regexp(p); |
837 | else | |
838 | regfree(&p->regexp); | |
526a858a | 839 | free(p->pattern); |
b48fb5b6 JH |
840 | break; |
841 | default: | |
842 | break; | |
843 | } | |
844 | free(p); | |
845 | } | |
846 | ||
847 | if (!opt->extended) | |
848 | return; | |
849 | free_pattern_expr(opt->pattern_expression); | |
850 | } | |
851 | ||
83b5d2f5 JH |
852 | static char *end_of_line(char *cp, unsigned long *left) |
853 | { | |
854 | unsigned long l = *left; | |
855 | while (l && *cp != '\n') { | |
856 | l--; | |
857 | cp++; | |
858 | } | |
859 | *left = l; | |
860 | return cp; | |
861 | } | |
862 | ||
863 | static int word_char(char ch) | |
864 | { | |
865 | return isalnum(ch) || ch == '_'; | |
866 | } | |
867 | ||
55f638bd ML |
868 | static void output_color(struct grep_opt *opt, const void *data, size_t size, |
869 | const char *color) | |
870 | { | |
daa0c3d9 | 871 | if (want_color(opt->color) && color && color[0]) { |
55f638bd ML |
872 | opt->output(opt, color, strlen(color)); |
873 | opt->output(opt, data, size); | |
874 | opt->output(opt, GIT_COLOR_RESET, strlen(GIT_COLOR_RESET)); | |
875 | } else | |
876 | opt->output(opt, data, size); | |
877 | } | |
878 | ||
879 | static void output_sep(struct grep_opt *opt, char sign) | |
880 | { | |
881 | if (opt->null_following_name) | |
882 | opt->output(opt, "\0", 1); | |
883 | else | |
884 | output_color(opt, &sign, 1, opt->color_sep); | |
885 | } | |
886 | ||
83caecca RZ |
887 | static void show_name(struct grep_opt *opt, const char *name) |
888 | { | |
55f638bd | 889 | output_color(opt, name, strlen(name), opt->color_filename); |
5b594f45 | 890 | opt->output(opt, opt->null_following_name ? "\0" : "\n", 1); |
83caecca RZ |
891 | } |
892 | ||
ed40a095 RS |
893 | static int fixmatch(struct grep_pat *p, char *line, char *eol, |
894 | regmatch_t *match) | |
83b5d2f5 | 895 | { |
9eceddee FK |
896 | struct kwsmatch kwsm; |
897 | size_t offset = kwsexec(p->kws, line, eol - line, &kwsm); | |
898 | if (offset == -1) { | |
83b5d2f5 JH |
899 | match->rm_so = match->rm_eo = -1; |
900 | return REG_NOMATCH; | |
9eceddee FK |
901 | } else { |
902 | match->rm_so = offset; | |
903 | match->rm_eo = match->rm_so + kwsm.size[0]; | |
83b5d2f5 JH |
904 | return 0; |
905 | } | |
906 | } | |
907 | ||
97e77784 MK |
908 | static int patmatch(struct grep_pat *p, char *line, char *eol, |
909 | regmatch_t *match, int eflags) | |
910 | { | |
911 | int hit; | |
912 | ||
913 | if (p->fixed) | |
914 | hit = !fixmatch(p, line, eol, match); | |
63e7e9d8 MK |
915 | else if (p->pcre_regexp) |
916 | hit = !pcrematch(p, line, eol, match, eflags); | |
97e77784 | 917 | else |
b7d36ffc JS |
918 | hit = !regexec_buf(&p->regexp, line, eol - line, 1, match, |
919 | eflags); | |
97e77784 MK |
920 | |
921 | return hit; | |
922 | } | |
923 | ||
a4d7d2c6 JH |
924 | static int strip_timestamp(char *bol, char **eol_p) |
925 | { | |
926 | char *eol = *eol_p; | |
927 | int ch; | |
928 | ||
929 | while (bol < --eol) { | |
930 | if (*eol != '>') | |
931 | continue; | |
932 | *eol_p = ++eol; | |
933 | ch = *eol; | |
934 | *eol = '\0'; | |
935 | return ch; | |
936 | } | |
937 | return 0; | |
938 | } | |
939 | ||
940 | static struct { | |
941 | const char *field; | |
942 | size_t len; | |
943 | } header_field[] = { | |
944 | { "author ", 7 }, | |
945 | { "committer ", 10 }, | |
72fd13f7 | 946 | { "reflog ", 7 }, |
a4d7d2c6 JH |
947 | }; |
948 | ||
d7eb527d | 949 | static int match_one_pattern(struct grep_pat *p, char *bol, char *eol, |
79212772 RS |
950 | enum grep_context ctx, |
951 | regmatch_t *pmatch, int eflags) | |
83b5d2f5 JH |
952 | { |
953 | int hit = 0; | |
a4d7d2c6 | 954 | int saved_ch = 0; |
e701fadb | 955 | const char *start = bol; |
83b5d2f5 | 956 | |
480c1ca6 JH |
957 | if ((p->token != GREP_PATTERN) && |
958 | ((p->token == GREP_PATTERN_HEAD) != (ctx == GREP_CONTEXT_HEAD))) | |
959 | return 0; | |
960 | ||
a4d7d2c6 JH |
961 | if (p->token == GREP_PATTERN_HEAD) { |
962 | const char *field; | |
963 | size_t len; | |
964 | assert(p->field < ARRAY_SIZE(header_field)); | |
965 | field = header_field[p->field].field; | |
966 | len = header_field[p->field].len; | |
967 | if (strncmp(bol, field, len)) | |
968 | return 0; | |
969 | bol += len; | |
ad4813b3 NTND |
970 | switch (p->field) { |
971 | case GREP_HEADER_AUTHOR: | |
972 | case GREP_HEADER_COMMITTER: | |
973 | saved_ch = strip_timestamp(bol, &eol); | |
974 | break; | |
975 | default: | |
976 | break; | |
977 | } | |
a4d7d2c6 JH |
978 | } |
979 | ||
83b5d2f5 | 980 | again: |
97e77784 | 981 | hit = patmatch(p, bol, eol, pmatch, eflags); |
83b5d2f5 | 982 | |
d7eb527d | 983 | if (hit && p->word_regexp) { |
83b5d2f5 | 984 | if ((pmatch[0].rm_so < 0) || |
84201eae | 985 | (eol - bol) < pmatch[0].rm_so || |
83b5d2f5 JH |
986 | (pmatch[0].rm_eo < 0) || |
987 | (eol - bol) < pmatch[0].rm_eo) | |
988 | die("regexp returned nonsense"); | |
989 | ||
990 | /* Match beginning must be either beginning of the | |
991 | * line, or at word boundary (i.e. the last char must | |
992 | * not be a word char). Similarly, match end must be | |
993 | * either end of the line, or at word boundary | |
994 | * (i.e. the next char must not be a word char). | |
995 | */ | |
fb62eb7f | 996 | if ( ((pmatch[0].rm_so == 0) || |
83b5d2f5 JH |
997 | !word_char(bol[pmatch[0].rm_so-1])) && |
998 | ((pmatch[0].rm_eo == (eol-bol)) || | |
999 | !word_char(bol[pmatch[0].rm_eo])) ) | |
1000 | ; | |
1001 | else | |
1002 | hit = 0; | |
1003 | ||
84201eae RS |
1004 | /* Words consist of at least one character. */ |
1005 | if (pmatch->rm_so == pmatch->rm_eo) | |
1006 | hit = 0; | |
1007 | ||
83b5d2f5 JH |
1008 | if (!hit && pmatch[0].rm_so + bol + 1 < eol) { |
1009 | /* There could be more than one match on the | |
1010 | * line, and the first match might not be | |
1011 | * strict word match. But later ones could be! | |
fb62eb7f RS |
1012 | * Forward to the next possible start, i.e. the |
1013 | * next position following a non-word char. | |
83b5d2f5 JH |
1014 | */ |
1015 | bol = pmatch[0].rm_so + bol + 1; | |
fb62eb7f RS |
1016 | while (word_char(bol[-1]) && bol < eol) |
1017 | bol++; | |
dbb6a4ad | 1018 | eflags |= REG_NOTBOL; |
fb62eb7f RS |
1019 | if (bol < eol) |
1020 | goto again; | |
83b5d2f5 JH |
1021 | } |
1022 | } | |
a4d7d2c6 JH |
1023 | if (p->token == GREP_PATTERN_HEAD && saved_ch) |
1024 | *eol = saved_ch; | |
e701fadb RS |
1025 | if (hit) { |
1026 | pmatch[0].rm_so += bol - start; | |
1027 | pmatch[0].rm_eo += bol - start; | |
1028 | } | |
83b5d2f5 JH |
1029 | return hit; |
1030 | } | |
1031 | ||
d7eb527d RS |
1032 | static int match_expr_eval(struct grep_expr *x, char *bol, char *eol, |
1033 | enum grep_context ctx, int collect_hits) | |
83b5d2f5 | 1034 | { |
0ab7befa | 1035 | int h = 0; |
79212772 | 1036 | regmatch_t match; |
0ab7befa | 1037 | |
c922b01f LT |
1038 | if (!x) |
1039 | die("Not a valid grep expression"); | |
83b5d2f5 | 1040 | switch (x->node) { |
5aaeb733 JH |
1041 | case GREP_NODE_TRUE: |
1042 | h = 1; | |
1043 | break; | |
83b5d2f5 | 1044 | case GREP_NODE_ATOM: |
79212772 | 1045 | h = match_one_pattern(x->u.atom, bol, eol, ctx, &match, 0); |
83b5d2f5 JH |
1046 | break; |
1047 | case GREP_NODE_NOT: | |
d7eb527d | 1048 | h = !match_expr_eval(x->u.unary, bol, eol, ctx, 0); |
0ab7befa | 1049 | break; |
83b5d2f5 | 1050 | case GREP_NODE_AND: |
d7eb527d | 1051 | if (!match_expr_eval(x->u.binary.left, bol, eol, ctx, 0)) |
252d560d | 1052 | return 0; |
d7eb527d | 1053 | h = match_expr_eval(x->u.binary.right, bol, eol, ctx, 0); |
0ab7befa | 1054 | break; |
83b5d2f5 | 1055 | case GREP_NODE_OR: |
0ab7befa | 1056 | if (!collect_hits) |
d7eb527d | 1057 | return (match_expr_eval(x->u.binary.left, |
0ab7befa | 1058 | bol, eol, ctx, 0) || |
d7eb527d | 1059 | match_expr_eval(x->u.binary.right, |
0ab7befa | 1060 | bol, eol, ctx, 0)); |
d7eb527d | 1061 | h = match_expr_eval(x->u.binary.left, bol, eol, ctx, 0); |
0ab7befa | 1062 | x->u.binary.left->hit |= h; |
d7eb527d | 1063 | h |= match_expr_eval(x->u.binary.right, bol, eol, ctx, 1); |
0ab7befa JH |
1064 | break; |
1065 | default: | |
d7530708 | 1066 | die("Unexpected node type (internal error) %d", x->node); |
83b5d2f5 | 1067 | } |
0ab7befa JH |
1068 | if (collect_hits) |
1069 | x->hit |= h; | |
1070 | return h; | |
83b5d2f5 JH |
1071 | } |
1072 | ||
480c1ca6 | 1073 | static int match_expr(struct grep_opt *opt, char *bol, char *eol, |
0ab7befa | 1074 | enum grep_context ctx, int collect_hits) |
83b5d2f5 JH |
1075 | { |
1076 | struct grep_expr *x = opt->pattern_expression; | |
d7eb527d | 1077 | return match_expr_eval(x, bol, eol, ctx, collect_hits); |
83b5d2f5 JH |
1078 | } |
1079 | ||
480c1ca6 | 1080 | static int match_line(struct grep_opt *opt, char *bol, char *eol, |
0ab7befa | 1081 | enum grep_context ctx, int collect_hits) |
83b5d2f5 JH |
1082 | { |
1083 | struct grep_pat *p; | |
79212772 RS |
1084 | regmatch_t match; |
1085 | ||
83b5d2f5 | 1086 | if (opt->extended) |
0ab7befa JH |
1087 | return match_expr(opt, bol, eol, ctx, collect_hits); |
1088 | ||
1089 | /* we do not call with collect_hits without being extended */ | |
83b5d2f5 | 1090 | for (p = opt->pattern_list; p; p = p->next) { |
79212772 | 1091 | if (match_one_pattern(p, bol, eol, ctx, &match, 0)) |
83b5d2f5 JH |
1092 | return 1; |
1093 | } | |
1094 | return 0; | |
1095 | } | |
1096 | ||
7e8f59d5 RS |
1097 | static int match_next_pattern(struct grep_pat *p, char *bol, char *eol, |
1098 | enum grep_context ctx, | |
1099 | regmatch_t *pmatch, int eflags) | |
1100 | { | |
1101 | regmatch_t match; | |
1102 | ||
1103 | if (!match_one_pattern(p, bol, eol, ctx, &match, eflags)) | |
1104 | return 0; | |
1105 | if (match.rm_so < 0 || match.rm_eo < 0) | |
1106 | return 0; | |
1107 | if (pmatch->rm_so >= 0 && pmatch->rm_eo >= 0) { | |
1108 | if (match.rm_so > pmatch->rm_so) | |
1109 | return 1; | |
1110 | if (match.rm_so == pmatch->rm_so && match.rm_eo < pmatch->rm_eo) | |
1111 | return 1; | |
1112 | } | |
1113 | pmatch->rm_so = match.rm_so; | |
1114 | pmatch->rm_eo = match.rm_eo; | |
1115 | return 1; | |
1116 | } | |
1117 | ||
1118 | static int next_match(struct grep_opt *opt, char *bol, char *eol, | |
1119 | enum grep_context ctx, regmatch_t *pmatch, int eflags) | |
1120 | { | |
1121 | struct grep_pat *p; | |
1122 | int hit = 0; | |
1123 | ||
1124 | pmatch->rm_so = pmatch->rm_eo = -1; | |
1125 | if (bol < eol) { | |
1126 | for (p = opt->pattern_list; p; p = p->next) { | |
1127 | switch (p->token) { | |
1128 | case GREP_PATTERN: /* atom */ | |
1129 | case GREP_PATTERN_HEAD: | |
1130 | case GREP_PATTERN_BODY: | |
1131 | hit |= match_next_pattern(p, bol, eol, ctx, | |
1132 | pmatch, eflags); | |
1133 | break; | |
1134 | default: | |
1135 | break; | |
1136 | } | |
1137 | } | |
1138 | } | |
1139 | return hit; | |
1140 | } | |
1141 | ||
1142 | static void show_line(struct grep_opt *opt, char *bol, char *eol, | |
1143 | const char *name, unsigned lno, char sign) | |
1144 | { | |
1145 | int rest = eol - bol; | |
79a77109 | 1146 | const char *match_color, *line_color = NULL; |
7e8f59d5 | 1147 | |
a8f0e764 RS |
1148 | if (opt->file_break && opt->last_shown == 0) { |
1149 | if (opt->show_hunk_mark) | |
1150 | opt->output(opt, "\n", 1); | |
ba8ea749 | 1151 | } else if (opt->pre_context || opt->post_context || opt->funcbody) { |
046802d0 | 1152 | if (opt->last_shown == 0) { |
55f638bd ML |
1153 | if (opt->show_hunk_mark) { |
1154 | output_color(opt, "--", 2, opt->color_sep); | |
1155 | opt->output(opt, "\n", 1); | |
07b838f0 | 1156 | } |
55f638bd ML |
1157 | } else if (lno > opt->last_shown + 1) { |
1158 | output_color(opt, "--", 2, opt->color_sep); | |
1159 | opt->output(opt, "\n", 1); | |
1160 | } | |
5dd06d38 | 1161 | } |
1d84f72e RS |
1162 | if (opt->heading && opt->last_shown == 0) { |
1163 | output_color(opt, name, strlen(name), opt->color_filename); | |
1164 | opt->output(opt, "\n", 1); | |
1165 | } | |
5dd06d38 RS |
1166 | opt->last_shown = lno; |
1167 | ||
1d84f72e | 1168 | if (!opt->heading && opt->pathname) { |
55f638bd ML |
1169 | output_color(opt, name, strlen(name), opt->color_filename); |
1170 | output_sep(opt, sign); | |
5b594f45 FK |
1171 | } |
1172 | if (opt->linenum) { | |
1173 | char buf[32]; | |
1a168e5c | 1174 | xsnprintf(buf, sizeof(buf), "%d", lno); |
55f638bd ML |
1175 | output_color(opt, buf, strlen(buf), opt->color_lineno); |
1176 | output_sep(opt, sign); | |
5b594f45 | 1177 | } |
7e8f59d5 RS |
1178 | if (opt->color) { |
1179 | regmatch_t match; | |
1180 | enum grep_context ctx = GREP_CONTEXT_BODY; | |
1181 | int ch = *eol; | |
1182 | int eflags = 0; | |
1183 | ||
79a77109 RS |
1184 | if (sign == ':') |
1185 | match_color = opt->color_match_selected; | |
1186 | else | |
1187 | match_color = opt->color_match_context; | |
00588bb5 ML |
1188 | if (sign == ':') |
1189 | line_color = opt->color_selected; | |
1190 | else if (sign == '-') | |
1191 | line_color = opt->color_context; | |
1192 | else if (sign == '=') | |
1193 | line_color = opt->color_function; | |
7e8f59d5 RS |
1194 | *eol = '\0'; |
1195 | while (next_match(opt, bol, eol, ctx, &match, eflags)) { | |
1f5b9cc4 RS |
1196 | if (match.rm_so == match.rm_eo) |
1197 | break; | |
5b594f45 | 1198 | |
00588bb5 | 1199 | output_color(opt, bol, match.rm_so, line_color); |
55f638bd | 1200 | output_color(opt, bol + match.rm_so, |
79a77109 | 1201 | match.rm_eo - match.rm_so, match_color); |
7e8f59d5 RS |
1202 | bol += match.rm_eo; |
1203 | rest -= match.rm_eo; | |
1204 | eflags = REG_NOTBOL; | |
1205 | } | |
1206 | *eol = ch; | |
1207 | } | |
00588bb5 | 1208 | output_color(opt, bol, rest, line_color); |
5b594f45 | 1209 | opt->output(opt, "\n", 1); |
7e8f59d5 RS |
1210 | } |
1211 | ||
0579f91d | 1212 | #ifndef NO_PTHREADS |
78db6ea9 JK |
1213 | int grep_use_locks; |
1214 | ||
0579f91d TR |
1215 | /* |
1216 | * This lock protects access to the gitattributes machinery, which is | |
1217 | * not thread-safe. | |
1218 | */ | |
1219 | pthread_mutex_t grep_attr_mutex; | |
1220 | ||
78db6ea9 | 1221 | static inline void grep_attr_lock(void) |
0579f91d | 1222 | { |
78db6ea9 | 1223 | if (grep_use_locks) |
0579f91d TR |
1224 | pthread_mutex_lock(&grep_attr_mutex); |
1225 | } | |
1226 | ||
78db6ea9 | 1227 | static inline void grep_attr_unlock(void) |
0579f91d | 1228 | { |
78db6ea9 | 1229 | if (grep_use_locks) |
0579f91d TR |
1230 | pthread_mutex_unlock(&grep_attr_mutex); |
1231 | } | |
b3aeb285 JK |
1232 | |
1233 | /* | |
1234 | * Same as git_attr_mutex, but protecting the thread-unsafe object db access. | |
1235 | */ | |
1236 | pthread_mutex_t grep_read_mutex; | |
1237 | ||
0579f91d | 1238 | #else |
78db6ea9 JK |
1239 | #define grep_attr_lock() |
1240 | #define grep_attr_unlock() | |
0579f91d TR |
1241 | #endif |
1242 | ||
e1327023 | 1243 | static int match_funcname(struct grep_opt *opt, struct grep_source *gs, char *bol, char *eol) |
2944e4e6 | 1244 | { |
60ecac98 | 1245 | xdemitconf_t *xecfg = opt->priv; |
0579f91d | 1246 | if (xecfg && !xecfg->find_func) { |
94ad9d9e JK |
1247 | grep_source_load_driver(gs); |
1248 | if (gs->driver->funcname.pattern) { | |
1249 | const struct userdiff_funcname *pe = &gs->driver->funcname; | |
0579f91d TR |
1250 | xdiff_set_find_func(xecfg, pe->pattern, pe->cflags); |
1251 | } else { | |
1252 | xecfg = opt->priv = NULL; | |
1253 | } | |
1254 | } | |
1255 | ||
1256 | if (xecfg) { | |
60ecac98 RS |
1257 | char buf[1]; |
1258 | return xecfg->find_func(bol, eol - bol, buf, 1, | |
1259 | xecfg->find_func_priv) >= 0; | |
1260 | } | |
1261 | ||
2944e4e6 RS |
1262 | if (bol == eol) |
1263 | return 0; | |
1264 | if (isalpha(*bol) || *bol == '_' || *bol == '$') | |
1265 | return 1; | |
1266 | return 0; | |
1267 | } | |
1268 | ||
e1327023 JK |
1269 | static void show_funcname_line(struct grep_opt *opt, struct grep_source *gs, |
1270 | char *bol, unsigned lno) | |
2944e4e6 | 1271 | { |
e1327023 | 1272 | while (bol > gs->buf) { |
2944e4e6 RS |
1273 | char *eol = --bol; |
1274 | ||
e1327023 | 1275 | while (bol > gs->buf && bol[-1] != '\n') |
2944e4e6 RS |
1276 | bol--; |
1277 | lno--; | |
1278 | ||
1279 | if (lno <= opt->last_shown) | |
1280 | break; | |
1281 | ||
e1327023 JK |
1282 | if (match_funcname(opt, gs, bol, eol)) { |
1283 | show_line(opt, bol, eol, gs->name, lno, '='); | |
2944e4e6 RS |
1284 | break; |
1285 | } | |
1286 | } | |
1287 | } | |
1288 | ||
e1327023 | 1289 | static void show_pre_context(struct grep_opt *opt, struct grep_source *gs, |
ba8ea749 | 1290 | char *bol, char *end, unsigned lno) |
49de3216 | 1291 | { |
2944e4e6 | 1292 | unsigned cur = lno, from = 1, funcname_lno = 0; |
ba8ea749 RS |
1293 | int funcname_needed = !!opt->funcname; |
1294 | ||
e1327023 | 1295 | if (opt->funcbody && !match_funcname(opt, gs, bol, end)) |
ba8ea749 | 1296 | funcname_needed = 2; |
49de3216 RS |
1297 | |
1298 | if (opt->pre_context < lno) | |
1299 | from = lno - opt->pre_context; | |
1300 | if (from <= opt->last_shown) | |
1301 | from = opt->last_shown + 1; | |
1302 | ||
1303 | /* Rewind. */ | |
e1327023 | 1304 | while (bol > gs->buf && |
ba8ea749 | 1305 | cur > (funcname_needed == 2 ? opt->last_shown + 1 : from)) { |
2944e4e6 RS |
1306 | char *eol = --bol; |
1307 | ||
e1327023 | 1308 | while (bol > gs->buf && bol[-1] != '\n') |
49de3216 RS |
1309 | bol--; |
1310 | cur--; | |
e1327023 | 1311 | if (funcname_needed && match_funcname(opt, gs, bol, eol)) { |
2944e4e6 RS |
1312 | funcname_lno = cur; |
1313 | funcname_needed = 0; | |
1314 | } | |
49de3216 RS |
1315 | } |
1316 | ||
2944e4e6 RS |
1317 | /* We need to look even further back to find a function signature. */ |
1318 | if (opt->funcname && funcname_needed) | |
e1327023 | 1319 | show_funcname_line(opt, gs, bol, cur); |
2944e4e6 | 1320 | |
49de3216 RS |
1321 | /* Back forward. */ |
1322 | while (cur < lno) { | |
2944e4e6 | 1323 | char *eol = bol, sign = (cur == funcname_lno) ? '=' : '-'; |
49de3216 RS |
1324 | |
1325 | while (*eol != '\n') | |
1326 | eol++; | |
e1327023 | 1327 | show_line(opt, bol, eol, gs->name, cur, sign); |
49de3216 RS |
1328 | bol = eol + 1; |
1329 | cur++; | |
1330 | } | |
1331 | } | |
1332 | ||
a26345b6 JH |
1333 | static int should_lookahead(struct grep_opt *opt) |
1334 | { | |
1335 | struct grep_pat *p; | |
1336 | ||
1337 | if (opt->extended) | |
1338 | return 0; /* punt for too complex stuff */ | |
1339 | if (opt->invert) | |
1340 | return 0; | |
1341 | for (p = opt->pattern_list; p; p = p->next) { | |
1342 | if (p->token != GREP_PATTERN) | |
1343 | return 0; /* punt for "header only" and stuff */ | |
1344 | } | |
1345 | return 1; | |
1346 | } | |
1347 | ||
1348 | static int look_ahead(struct grep_opt *opt, | |
1349 | unsigned long *left_p, | |
1350 | unsigned *lno_p, | |
1351 | char **bol_p) | |
1352 | { | |
1353 | unsigned lno = *lno_p; | |
1354 | char *bol = *bol_p; | |
1355 | struct grep_pat *p; | |
1356 | char *sp, *last_bol; | |
1357 | regoff_t earliest = -1; | |
1358 | ||
1359 | for (p = opt->pattern_list; p; p = p->next) { | |
1360 | int hit; | |
1361 | regmatch_t m; | |
1362 | ||
97e77784 | 1363 | hit = patmatch(p, bol, bol + *left_p, &m, 0); |
a26345b6 JH |
1364 | if (!hit || m.rm_so < 0 || m.rm_eo < 0) |
1365 | continue; | |
1366 | if (earliest < 0 || m.rm_so < earliest) | |
1367 | earliest = m.rm_so; | |
1368 | } | |
1369 | ||
1370 | if (earliest < 0) { | |
1371 | *bol_p = bol + *left_p; | |
1372 | *left_p = 0; | |
1373 | return 1; | |
1374 | } | |
1375 | for (sp = bol + earliest; bol < sp && sp[-1] != '\n'; sp--) | |
1376 | ; /* find the beginning of the line */ | |
1377 | last_bol = sp; | |
1378 | ||
1379 | for (sp = bol; sp < last_bol; sp++) { | |
1380 | if (*sp == '\n') | |
1381 | lno++; | |
1382 | } | |
1383 | *left_p -= last_bol - bol; | |
1384 | *bol_p = last_bol; | |
1385 | *lno_p = lno; | |
1386 | return 0; | |
1387 | } | |
1388 | ||
335ec3bf JK |
1389 | static int fill_textconv_grep(struct userdiff_driver *driver, |
1390 | struct grep_source *gs) | |
1391 | { | |
1392 | struct diff_filespec *df; | |
1393 | char *buf; | |
1394 | size_t size; | |
1395 | ||
1396 | if (!driver || !driver->textconv) | |
1397 | return grep_source_load(gs); | |
1398 | ||
1399 | /* | |
1400 | * The textconv interface is intimately tied to diff_filespecs, so we | |
1401 | * have to pretend to be one. If we could unify the grep_source | |
1402 | * and diff_filespec structs, this mess could just go away. | |
1403 | */ | |
1404 | df = alloc_filespec(gs->path); | |
1405 | switch (gs->type) { | |
1406 | case GREP_SOURCE_SHA1: | |
1407 | fill_filespec(df, gs->identifier, 1, 0100644); | |
1408 | break; | |
1409 | case GREP_SOURCE_FILE: | |
1410 | fill_filespec(df, null_sha1, 0, 0100644); | |
1411 | break; | |
1412 | default: | |
1413 | die("BUG: attempt to textconv something without a path?"); | |
1414 | } | |
1415 | ||
1416 | /* | |
1417 | * fill_textconv is not remotely thread-safe; it may load objects | |
1418 | * behind the scenes, and it modifies the global diff tempfile | |
1419 | * structure. | |
1420 | */ | |
1421 | grep_read_lock(); | |
1422 | size = fill_textconv(driver, df, &buf); | |
1423 | grep_read_unlock(); | |
1424 | free_filespec(df); | |
1425 | ||
1426 | /* | |
1427 | * The normal fill_textconv usage by the diff machinery would just keep | |
1428 | * the textconv'd buf separate from the diff_filespec. But much of the | |
1429 | * grep code passes around a grep_source and assumes that its "buf" | |
1430 | * pointer is the beginning of the thing we are searching. So let's | |
1431 | * install our textconv'd version into the grep_source, taking care not | |
1432 | * to leak any existing buffer. | |
1433 | */ | |
1434 | grep_source_clear_data(gs); | |
1435 | gs->buf = buf; | |
1436 | gs->size = size; | |
1437 | ||
1438 | return 0; | |
1439 | } | |
1440 | ||
4aa2c475 RS |
1441 | static int is_empty_line(const char *bol, const char *eol) |
1442 | { | |
1443 | while (bol < eol && isspace(*bol)) | |
1444 | bol++; | |
1445 | return bol == eol; | |
1446 | } | |
1447 | ||
e1327023 | 1448 | static int grep_source_1(struct grep_opt *opt, struct grep_source *gs, int collect_hits) |
83b5d2f5 | 1449 | { |
e1327023 | 1450 | char *bol; |
4aa2c475 | 1451 | char *peek_bol = NULL; |
e1327023 | 1452 | unsigned long left; |
83b5d2f5 | 1453 | unsigned lno = 1; |
83b5d2f5 | 1454 | unsigned last_hit = 0; |
83b5d2f5 | 1455 | int binary_match_only = 0; |
83b5d2f5 | 1456 | unsigned count = 0; |
a26345b6 | 1457 | int try_lookahead = 0; |
ba8ea749 | 1458 | int show_function = 0; |
335ec3bf | 1459 | struct userdiff_driver *textconv = NULL; |
480c1ca6 | 1460 | enum grep_context ctx = GREP_CONTEXT_HEAD; |
60ecac98 | 1461 | xdemitconf_t xecfg; |
83b5d2f5 | 1462 | |
5b594f45 FK |
1463 | if (!opt->output) |
1464 | opt->output = std_output; | |
1465 | ||
ba8ea749 RS |
1466 | if (opt->pre_context || opt->post_context || opt->file_break || |
1467 | opt->funcbody) { | |
08303c36 RS |
1468 | /* Show hunk marks, except for the first file. */ |
1469 | if (opt->last_shown) | |
1470 | opt->show_hunk_mark = 1; | |
1471 | /* | |
1472 | * If we're using threads then we can't easily identify | |
1473 | * the first file. Always put hunk marks in that case | |
1474 | * and skip the very first one later in work_done(). | |
1475 | */ | |
1476 | if (opt->output != std_output) | |
1477 | opt->show_hunk_mark = 1; | |
1478 | } | |
431d6e7b RS |
1479 | opt->last_shown = 0; |
1480 | ||
335ec3bf JK |
1481 | if (opt->allow_textconv) { |
1482 | grep_source_load_driver(gs); | |
1483 | /* | |
1484 | * We might set up the shared textconv cache data here, which | |
1485 | * is not thread-safe. | |
1486 | */ | |
1487 | grep_attr_lock(); | |
1488 | textconv = userdiff_get_textconv(gs->driver); | |
1489 | grep_attr_unlock(); | |
1490 | } | |
1491 | ||
1492 | /* | |
1493 | * We know the result of a textconv is text, so we only have to care | |
1494 | * about binary handling if we are not using it. | |
1495 | */ | |
1496 | if (!textconv) { | |
1497 | switch (opt->binary) { | |
1498 | case GREP_BINARY_DEFAULT: | |
1499 | if (grep_source_is_binary(gs)) | |
1500 | binary_match_only = 1; | |
1501 | break; | |
1502 | case GREP_BINARY_NOMATCH: | |
1503 | if (grep_source_is_binary(gs)) | |
1504 | return 0; /* Assume unmatch */ | |
1505 | break; | |
1506 | case GREP_BINARY_TEXT: | |
1507 | break; | |
1508 | default: | |
ef1177d1 | 1509 | die("BUG: unknown binary handling mode"); |
335ec3bf | 1510 | } |
83b5d2f5 JH |
1511 | } |
1512 | ||
60ecac98 | 1513 | memset(&xecfg, 0, sizeof(xecfg)); |
0579f91d TR |
1514 | opt->priv = &xecfg; |
1515 | ||
a26345b6 | 1516 | try_lookahead = should_lookahead(opt); |
60ecac98 | 1517 | |
335ec3bf | 1518 | if (fill_textconv_grep(textconv, gs) < 0) |
08265798 JK |
1519 | return 0; |
1520 | ||
e1327023 JK |
1521 | bol = gs->buf; |
1522 | left = gs->size; | |
83b5d2f5 JH |
1523 | while (left) { |
1524 | char *eol, ch; | |
0ab7befa | 1525 | int hit; |
83b5d2f5 | 1526 | |
a26345b6 | 1527 | /* |
8997da38 | 1528 | * look_ahead() skips quickly to the line that possibly |
a26345b6 JH |
1529 | * has the next hit; don't call it if we need to do |
1530 | * something more than just skipping the current line | |
1531 | * in response to an unmatch for the current line. E.g. | |
1532 | * inside a post-context window, we will show the current | |
1533 | * line as a context around the previous hit when it | |
1534 | * doesn't hit. | |
1535 | */ | |
1536 | if (try_lookahead | |
1537 | && !(last_hit | |
ba8ea749 RS |
1538 | && (show_function || |
1539 | lno <= last_hit + opt->post_context)) | |
a26345b6 JH |
1540 | && look_ahead(opt, &left, &lno, &bol)) |
1541 | break; | |
83b5d2f5 JH |
1542 | eol = end_of_line(bol, &left); |
1543 | ch = *eol; | |
1544 | *eol = 0; | |
1545 | ||
480c1ca6 JH |
1546 | if ((ctx == GREP_CONTEXT_HEAD) && (eol == bol)) |
1547 | ctx = GREP_CONTEXT_BODY; | |
1548 | ||
0ab7befa | 1549 | hit = match_line(opt, bol, eol, ctx, collect_hits); |
83b5d2f5 JH |
1550 | *eol = ch; |
1551 | ||
0ab7befa JH |
1552 | if (collect_hits) |
1553 | goto next_line; | |
1554 | ||
83b5d2f5 JH |
1555 | /* "grep -v -e foo -e bla" should list lines |
1556 | * that do not have either, so inversion should | |
1557 | * be done outside. | |
1558 | */ | |
1559 | if (opt->invert) | |
1560 | hit = !hit; | |
1561 | if (opt->unmatch_name_only) { | |
1562 | if (hit) | |
1563 | return 0; | |
1564 | goto next_line; | |
1565 | } | |
1566 | if (hit) { | |
1567 | count++; | |
1568 | if (opt->status_only) | |
1569 | return 1; | |
321ffcc0 | 1570 | if (opt->name_only) { |
e1327023 | 1571 | show_name(opt, gs->name); |
321ffcc0 RS |
1572 | return 1; |
1573 | } | |
c30c10cf RS |
1574 | if (opt->count) |
1575 | goto next_line; | |
83b5d2f5 | 1576 | if (binary_match_only) { |
5b594f45 | 1577 | opt->output(opt, "Binary file ", 12); |
e1327023 | 1578 | output_color(opt, gs->name, strlen(gs->name), |
55f638bd | 1579 | opt->color_filename); |
5b594f45 | 1580 | opt->output(opt, " matches\n", 9); |
83b5d2f5 JH |
1581 | return 1; |
1582 | } | |
83b5d2f5 JH |
1583 | /* Hit at this line. If we haven't shown the |
1584 | * pre-context lines, we would need to show them. | |
83b5d2f5 | 1585 | */ |
ba8ea749 | 1586 | if (opt->pre_context || opt->funcbody) |
e1327023 | 1587 | show_pre_context(opt, gs, bol, eol, lno); |
2944e4e6 | 1588 | else if (opt->funcname) |
e1327023 JK |
1589 | show_funcname_line(opt, gs, bol, lno); |
1590 | show_line(opt, bol, eol, gs->name, lno, ':'); | |
5dd06d38 | 1591 | last_hit = lno; |
ba8ea749 RS |
1592 | if (opt->funcbody) |
1593 | show_function = 1; | |
1594 | goto next_line; | |
83b5d2f5 | 1595 | } |
4aa2c475 RS |
1596 | if (show_function && (!peek_bol || peek_bol < bol)) { |
1597 | unsigned long peek_left = left; | |
1598 | char *peek_eol = eol; | |
1599 | ||
1600 | /* | |
1601 | * Trailing empty lines are not interesting. | |
1602 | * Peek past them to see if they belong to the | |
1603 | * body of the current function. | |
1604 | */ | |
1605 | peek_bol = bol; | |
1606 | while (is_empty_line(peek_bol, peek_eol)) { | |
1607 | peek_bol = peek_eol + 1; | |
1608 | peek_eol = end_of_line(peek_bol, &peek_left); | |
1609 | } | |
1610 | ||
1611 | if (match_funcname(opt, gs, peek_bol, peek_eol)) | |
1612 | show_function = 0; | |
1613 | } | |
ba8ea749 RS |
1614 | if (show_function || |
1615 | (last_hit && lno <= last_hit + opt->post_context)) { | |
83b5d2f5 JH |
1616 | /* If the last hit is within the post context, |
1617 | * we need to show this line. | |
1618 | */ | |
e1327023 | 1619 | show_line(opt, bol, eol, gs->name, lno, '-'); |
83b5d2f5 | 1620 | } |
83b5d2f5 JH |
1621 | |
1622 | next_line: | |
1623 | bol = eol + 1; | |
1624 | if (!left) | |
1625 | break; | |
1626 | left--; | |
1627 | lno++; | |
1628 | } | |
1629 | ||
0ab7befa JH |
1630 | if (collect_hits) |
1631 | return 0; | |
b48fb5b6 | 1632 | |
83b5d2f5 JH |
1633 | if (opt->status_only) |
1634 | return 0; | |
1635 | if (opt->unmatch_name_only) { | |
1636 | /* We did not see any hit, so we want to show this */ | |
e1327023 | 1637 | show_name(opt, gs->name); |
83b5d2f5 JH |
1638 | return 1; |
1639 | } | |
1640 | ||
60ecac98 RS |
1641 | xdiff_clear_find_func(&xecfg); |
1642 | opt->priv = NULL; | |
1643 | ||
83b5d2f5 JH |
1644 | /* NEEDSWORK: |
1645 | * The real "grep -c foo *.c" gives many "bar.c:0" lines, | |
1646 | * which feels mostly useless but sometimes useful. Maybe | |
1647 | * make it another option? For now suppress them. | |
1648 | */ | |
5b594f45 FK |
1649 | if (opt->count && count) { |
1650 | char buf[32]; | |
f76d947a RS |
1651 | if (opt->pathname) { |
1652 | output_color(opt, gs->name, strlen(gs->name), | |
1653 | opt->color_filename); | |
1654 | output_sep(opt, ':'); | |
1655 | } | |
1a168e5c | 1656 | xsnprintf(buf, sizeof(buf), "%u\n", count); |
5b594f45 | 1657 | opt->output(opt, buf, strlen(buf)); |
c30c10cf | 1658 | return 1; |
5b594f45 | 1659 | } |
83b5d2f5 JH |
1660 | return !!last_hit; |
1661 | } | |
1662 | ||
0ab7befa JH |
1663 | static void clr_hit_marker(struct grep_expr *x) |
1664 | { | |
1665 | /* All-hit markers are meaningful only at the very top level | |
1666 | * OR node. | |
1667 | */ | |
1668 | while (1) { | |
1669 | x->hit = 0; | |
1670 | if (x->node != GREP_NODE_OR) | |
1671 | return; | |
1672 | x->u.binary.left->hit = 0; | |
1673 | x = x->u.binary.right; | |
1674 | } | |
1675 | } | |
1676 | ||
1677 | static int chk_hit_marker(struct grep_expr *x) | |
1678 | { | |
1679 | /* Top level nodes have hit markers. See if they all are hits */ | |
1680 | while (1) { | |
1681 | if (x->node != GREP_NODE_OR) | |
1682 | return x->hit; | |
1683 | if (!x->u.binary.left->hit) | |
1684 | return 0; | |
1685 | x = x->u.binary.right; | |
1686 | } | |
1687 | } | |
1688 | ||
e1327023 | 1689 | int grep_source(struct grep_opt *opt, struct grep_source *gs) |
0ab7befa JH |
1690 | { |
1691 | /* | |
1692 | * we do not have to do the two-pass grep when we do not check | |
1693 | * buffer-wide "all-match". | |
1694 | */ | |
1695 | if (!opt->all_match) | |
e1327023 | 1696 | return grep_source_1(opt, gs, 0); |
0ab7befa JH |
1697 | |
1698 | /* Otherwise the toplevel "or" terms hit a bit differently. | |
1699 | * We first clear hit markers from them. | |
1700 | */ | |
1701 | clr_hit_marker(opt->pattern_expression); | |
e1327023 | 1702 | grep_source_1(opt, gs, 1); |
0ab7befa JH |
1703 | |
1704 | if (!chk_hit_marker(opt->pattern_expression)) | |
1705 | return 0; | |
1706 | ||
e1327023 JK |
1707 | return grep_source_1(opt, gs, 0); |
1708 | } | |
1709 | ||
c876d6da | 1710 | int grep_buffer(struct grep_opt *opt, char *buf, unsigned long size) |
e1327023 JK |
1711 | { |
1712 | struct grep_source gs; | |
1713 | int r; | |
1714 | ||
55c61688 | 1715 | grep_source_init(&gs, GREP_SOURCE_BUF, NULL, NULL, NULL); |
e1327023 JK |
1716 | gs.buf = buf; |
1717 | gs.size = size; | |
1718 | ||
1719 | r = grep_source(opt, &gs); | |
1720 | ||
1721 | grep_source_clear(&gs); | |
1722 | return r; | |
1723 | } | |
1724 | ||
1725 | void grep_source_init(struct grep_source *gs, enum grep_source_type type, | |
55c61688 NTND |
1726 | const char *name, const char *path, |
1727 | const void *identifier) | |
e1327023 JK |
1728 | { |
1729 | gs->type = type; | |
8c53f071 JK |
1730 | gs->name = xstrdup_or_null(name); |
1731 | gs->path = xstrdup_or_null(path); | |
e1327023 JK |
1732 | gs->buf = NULL; |
1733 | gs->size = 0; | |
94ad9d9e | 1734 | gs->driver = NULL; |
e1327023 JK |
1735 | |
1736 | switch (type) { | |
1737 | case GREP_SOURCE_FILE: | |
1738 | gs->identifier = xstrdup(identifier); | |
1739 | break; | |
4538eef5 BW |
1740 | case GREP_SOURCE_SUBMODULE: |
1741 | if (!identifier) { | |
1742 | gs->identifier = NULL; | |
1743 | break; | |
1744 | } | |
1745 | /* | |
1746 | * FALL THROUGH | |
1747 | * If the identifier is non-NULL (in the submodule case) it | |
1748 | * will be a SHA1 that needs to be copied. | |
1749 | */ | |
e1327023 JK |
1750 | case GREP_SOURCE_SHA1: |
1751 | gs->identifier = xmalloc(20); | |
50546b15 | 1752 | hashcpy(gs->identifier, identifier); |
e1327023 JK |
1753 | break; |
1754 | case GREP_SOURCE_BUF: | |
1755 | gs->identifier = NULL; | |
4538eef5 | 1756 | break; |
e1327023 JK |
1757 | } |
1758 | } | |
1759 | ||
1760 | void grep_source_clear(struct grep_source *gs) | |
1761 | { | |
1762 | free(gs->name); | |
1763 | gs->name = NULL; | |
55c61688 NTND |
1764 | free(gs->path); |
1765 | gs->path = NULL; | |
e1327023 JK |
1766 | free(gs->identifier); |
1767 | gs->identifier = NULL; | |
1768 | grep_source_clear_data(gs); | |
1769 | } | |
1770 | ||
1771 | void grep_source_clear_data(struct grep_source *gs) | |
1772 | { | |
1773 | switch (gs->type) { | |
1774 | case GREP_SOURCE_FILE: | |
1775 | case GREP_SOURCE_SHA1: | |
4538eef5 | 1776 | case GREP_SOURCE_SUBMODULE: |
e1327023 JK |
1777 | free(gs->buf); |
1778 | gs->buf = NULL; | |
1779 | gs->size = 0; | |
1780 | break; | |
1781 | case GREP_SOURCE_BUF: | |
1782 | /* leave user-provided buf intact */ | |
1783 | break; | |
1784 | } | |
1785 | } | |
1786 | ||
1787 | static int grep_source_load_sha1(struct grep_source *gs) | |
1788 | { | |
1789 | enum object_type type; | |
1790 | ||
1791 | grep_read_lock(); | |
1792 | gs->buf = read_sha1_file(gs->identifier, &type, &gs->size); | |
1793 | grep_read_unlock(); | |
1794 | ||
1795 | if (!gs->buf) | |
1796 | return error(_("'%s': unable to read %s"), | |
1797 | gs->name, | |
1798 | sha1_to_hex(gs->identifier)); | |
1799 | return 0; | |
1800 | } | |
1801 | ||
1802 | static int grep_source_load_file(struct grep_source *gs) | |
1803 | { | |
1804 | const char *filename = gs->identifier; | |
1805 | struct stat st; | |
1806 | char *data; | |
1807 | size_t size; | |
1808 | int i; | |
1809 | ||
1810 | if (lstat(filename, &st) < 0) { | |
1811 | err_ret: | |
1812 | if (errno != ENOENT) | |
7645d8f1 | 1813 | error_errno(_("failed to stat '%s'"), filename); |
e1327023 JK |
1814 | return -1; |
1815 | } | |
1816 | if (!S_ISREG(st.st_mode)) | |
1817 | return -1; | |
1818 | size = xsize_t(st.st_size); | |
1819 | i = open(filename, O_RDONLY); | |
1820 | if (i < 0) | |
1821 | goto err_ret; | |
3733e694 | 1822 | data = xmallocz(size); |
e1327023 | 1823 | if (st.st_size != read_in_full(i, data, size)) { |
7645d8f1 | 1824 | error_errno(_("'%s': short read"), filename); |
e1327023 JK |
1825 | close(i); |
1826 | free(data); | |
1827 | return -1; | |
1828 | } | |
1829 | close(i); | |
e1327023 JK |
1830 | |
1831 | gs->buf = data; | |
1832 | gs->size = size; | |
1833 | return 0; | |
1834 | } | |
1835 | ||
3083301e | 1836 | static int grep_source_load(struct grep_source *gs) |
e1327023 JK |
1837 | { |
1838 | if (gs->buf) | |
1839 | return 0; | |
1840 | ||
1841 | switch (gs->type) { | |
1842 | case GREP_SOURCE_FILE: | |
1843 | return grep_source_load_file(gs); | |
1844 | case GREP_SOURCE_SHA1: | |
1845 | return grep_source_load_sha1(gs); | |
1846 | case GREP_SOURCE_BUF: | |
1847 | return gs->buf ? 0 : -1; | |
4538eef5 BW |
1848 | case GREP_SOURCE_SUBMODULE: |
1849 | break; | |
e1327023 | 1850 | } |
4538eef5 | 1851 | die("BUG: invalid grep_source type to load"); |
0ab7befa | 1852 | } |
94ad9d9e JK |
1853 | |
1854 | void grep_source_load_driver(struct grep_source *gs) | |
1855 | { | |
1856 | if (gs->driver) | |
1857 | return; | |
1858 | ||
1859 | grep_attr_lock(); | |
55c61688 NTND |
1860 | if (gs->path) |
1861 | gs->driver = userdiff_find_by_path(gs->path); | |
94ad9d9e JK |
1862 | if (!gs->driver) |
1863 | gs->driver = userdiff_find_by_name("default"); | |
1864 | grep_attr_unlock(); | |
1865 | } | |
41b59bfc | 1866 | |
3083301e | 1867 | static int grep_source_is_binary(struct grep_source *gs) |
41b59bfc JK |
1868 | { |
1869 | grep_source_load_driver(gs); | |
1870 | if (gs->driver->binary != -1) | |
1871 | return gs->driver->binary; | |
1872 | ||
1873 | if (!grep_source_load(gs)) | |
1874 | return buffer_is_binary(gs->buf, gs->size); | |
1875 | ||
1876 | return 0; | |
1877 | } |