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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 | |
c5c31d33 JH |
166 | void grep_commit_pattern_type(enum grep_pattern_type pattern_type, struct grep_opt *opt) |
167 | { | |
168 | if (pattern_type != GREP_PATTERN_TYPE_UNSPECIFIED) | |
169 | grep_set_pattern_type_option(pattern_type, opt); | |
170 | else if (opt->pattern_type_option != GREP_PATTERN_TYPE_UNSPECIFIED) | |
171 | grep_set_pattern_type_option(opt->pattern_type_option, opt); | |
172 | else if (opt->extended_regexp_option) | |
173 | grep_set_pattern_type_option(GREP_PATTERN_TYPE_ERE, opt); | |
174 | } | |
175 | ||
176 | void grep_set_pattern_type_option(enum grep_pattern_type pattern_type, struct grep_opt *opt) | |
177 | { | |
178 | switch (pattern_type) { | |
179 | case GREP_PATTERN_TYPE_UNSPECIFIED: | |
180 | /* fall through */ | |
181 | ||
182 | case GREP_PATTERN_TYPE_BRE: | |
183 | opt->fixed = 0; | |
184 | opt->pcre = 0; | |
185 | opt->regflags &= ~REG_EXTENDED; | |
186 | break; | |
187 | ||
188 | case GREP_PATTERN_TYPE_ERE: | |
189 | opt->fixed = 0; | |
190 | opt->pcre = 0; | |
191 | opt->regflags |= REG_EXTENDED; | |
192 | break; | |
193 | ||
194 | case GREP_PATTERN_TYPE_FIXED: | |
195 | opt->fixed = 1; | |
196 | opt->pcre = 0; | |
197 | opt->regflags &= ~REG_EXTENDED; | |
198 | break; | |
199 | ||
200 | case GREP_PATTERN_TYPE_PCRE: | |
201 | opt->fixed = 0; | |
202 | opt->pcre = 1; | |
203 | opt->regflags &= ~REG_EXTENDED; | |
204 | break; | |
205 | } | |
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 | } |
63e7e9d8 MK |
332 | |
333 | p->pcre_regexp = pcre_compile(p->pattern, options, &error, &erroffset, | |
9d9babb8 | 334 | p->pcre_tables); |
63e7e9d8 MK |
335 | if (!p->pcre_regexp) |
336 | compile_regexp_failed(p, error); | |
337 | ||
338 | p->pcre_extra_info = pcre_study(p->pcre_regexp, 0, &error); | |
339 | if (!p->pcre_extra_info && error) | |
340 | die("%s", error); | |
341 | } | |
342 | ||
343 | static int pcrematch(struct grep_pat *p, const char *line, const char *eol, | |
344 | regmatch_t *match, int eflags) | |
345 | { | |
346 | int ovector[30], ret, flags = 0; | |
347 | ||
348 | if (eflags & REG_NOTBOL) | |
349 | flags |= PCRE_NOTBOL; | |
350 | ||
351 | ret = pcre_exec(p->pcre_regexp, p->pcre_extra_info, line, eol - line, | |
352 | 0, flags, ovector, ARRAY_SIZE(ovector)); | |
353 | if (ret < 0 && ret != PCRE_ERROR_NOMATCH) | |
354 | die("pcre_exec failed with error code %d", ret); | |
355 | if (ret > 0) { | |
356 | ret = 0; | |
357 | match->rm_so = ovector[0]; | |
358 | match->rm_eo = ovector[1]; | |
359 | } | |
360 | ||
361 | return ret; | |
362 | } | |
363 | ||
364 | static void free_pcre_regexp(struct grep_pat *p) | |
365 | { | |
366 | pcre_free(p->pcre_regexp); | |
367 | pcre_free(p->pcre_extra_info); | |
9d9babb8 | 368 | pcre_free((void *)p->pcre_tables); |
63e7e9d8 MK |
369 | } |
370 | #else /* !USE_LIBPCRE */ | |
371 | static void compile_pcre_regexp(struct grep_pat *p, const struct grep_opt *opt) | |
372 | { | |
373 | die("cannot use Perl-compatible regexes when not compiled with USE_LIBPCRE"); | |
374 | } | |
375 | ||
376 | static int pcrematch(struct grep_pat *p, const char *line, const char *eol, | |
377 | regmatch_t *match, int eflags) | |
378 | { | |
379 | return 1; | |
380 | } | |
381 | ||
382 | static void free_pcre_regexp(struct grep_pat *p) | |
383 | { | |
384 | } | |
385 | #endif /* !USE_LIBPCRE */ | |
386 | ||
9eceddee FK |
387 | static int is_fixed(const char *s, size_t len) |
388 | { | |
389 | size_t i; | |
390 | ||
391 | /* regcomp cannot accept patterns with NULs so we | |
392 | * consider any pattern containing a NUL fixed. | |
393 | */ | |
394 | if (memchr(s, 0, len)) | |
395 | return 1; | |
396 | ||
397 | for (i = 0; i < len; i++) { | |
398 | if (is_regex_special(s[i])) | |
399 | return 0; | |
400 | } | |
401 | ||
402 | return 1; | |
403 | } | |
404 | ||
793dc676 NTND |
405 | static void compile_fixed_regexp(struct grep_pat *p, struct grep_opt *opt) |
406 | { | |
407 | struct strbuf sb = STRBUF_INIT; | |
408 | int err; | |
409 | int regflags; | |
410 | ||
411 | basic_regex_quote_buf(&sb, p->pattern); | |
412 | regflags = opt->regflags & ~REG_EXTENDED; | |
413 | if (opt->ignore_case) | |
414 | regflags |= REG_ICASE; | |
415 | err = regcomp(&p->regexp, sb.buf, regflags); | |
416 | if (opt->debug) | |
417 | fprintf(stderr, "fixed %s\n", sb.buf); | |
418 | strbuf_release(&sb); | |
419 | if (err) { | |
420 | char errbuf[1024]; | |
421 | regerror(err, &p->regexp, errbuf, sizeof(errbuf)); | |
422 | regfree(&p->regexp); | |
423 | compile_regexp_failed(p, errbuf); | |
424 | } | |
425 | } | |
426 | ||
83b5d2f5 JH |
427 | static void compile_regexp(struct grep_pat *p, struct grep_opt *opt) |
428 | { | |
5c1ebcca | 429 | int icase, ascii_only; |
c822255c RS |
430 | int err; |
431 | ||
d7eb527d | 432 | p->word_regexp = opt->word_regexp; |
5183bf67 | 433 | p->ignore_case = opt->ignore_case; |
5c1ebcca NTND |
434 | icase = opt->regflags & REG_ICASE || p->ignore_case; |
435 | ascii_only = !has_non_ascii(p->pattern); | |
d7eb527d | 436 | |
793dc676 NTND |
437 | /* |
438 | * Even when -F (fixed) asks us to do a non-regexp search, we | |
439 | * may not be able to correctly case-fold when -i | |
440 | * (ignore-case) is asked (in which case, we'll synthesize a | |
441 | * regexp to match the pattern that matches regexp special | |
442 | * characters literally, while ignoring case differences). On | |
443 | * the other hand, even without -F, if the pattern does not | |
444 | * have any regexp special characters and there is no need for | |
445 | * case-folding search, we can internally turn it into a | |
446 | * simple string match using kws. p->fixed tells us if we | |
447 | * want to use kws. | |
448 | */ | |
e944d9d9 | 449 | if (opt->fixed || is_fixed(p->pattern, p->patternlen)) |
793dc676 | 450 | p->fixed = !icase || ascii_only; |
9eceddee FK |
451 | else |
452 | p->fixed = 0; | |
453 | ||
454 | if (p->fixed) { | |
0f871cf5 JH |
455 | if (opt->regflags & REG_ICASE || p->ignore_case) |
456 | p->kws = kwsalloc(tolower_trans_tbl); | |
457 | else | |
9eceddee | 458 | p->kws = kwsalloc(NULL); |
9eceddee FK |
459 | kwsincr(p->kws, p->pattern, p->patternlen); |
460 | kwsprep(p->kws); | |
c822255c | 461 | return; |
793dc676 NTND |
462 | } else if (opt->fixed) { |
463 | /* | |
464 | * We come here when the pattern has the non-ascii | |
465 | * characters we cannot case-fold, and asked to | |
466 | * ignore-case. | |
467 | */ | |
468 | compile_fixed_regexp(p, opt); | |
469 | return; | |
9eceddee | 470 | } |
c822255c | 471 | |
63e7e9d8 MK |
472 | if (opt->pcre) { |
473 | compile_pcre_regexp(p, opt); | |
474 | return; | |
475 | } | |
476 | ||
c822255c | 477 | err = regcomp(&p->regexp, p->pattern, opt->regflags); |
83b5d2f5 JH |
478 | if (err) { |
479 | char errbuf[1024]; | |
83b5d2f5 JH |
480 | regerror(err, &p->regexp, errbuf, 1024); |
481 | regfree(&p->regexp); | |
a30c148a | 482 | compile_regexp_failed(p, errbuf); |
83b5d2f5 JH |
483 | } |
484 | } | |
485 | ||
0ab7befa | 486 | static struct grep_expr *compile_pattern_or(struct grep_pat **); |
83b5d2f5 JH |
487 | static struct grep_expr *compile_pattern_atom(struct grep_pat **list) |
488 | { | |
489 | struct grep_pat *p; | |
490 | struct grep_expr *x; | |
491 | ||
492 | p = *list; | |
c922b01f LT |
493 | if (!p) |
494 | return NULL; | |
83b5d2f5 JH |
495 | switch (p->token) { |
496 | case GREP_PATTERN: /* atom */ | |
480c1ca6 JH |
497 | case GREP_PATTERN_HEAD: |
498 | case GREP_PATTERN_BODY: | |
83b5d2f5 JH |
499 | x = xcalloc(1, sizeof (struct grep_expr)); |
500 | x->node = GREP_NODE_ATOM; | |
501 | x->u.atom = p; | |
502 | *list = p->next; | |
503 | return x; | |
504 | case GREP_OPEN_PAREN: | |
505 | *list = p->next; | |
0ab7befa | 506 | x = compile_pattern_or(list); |
83b5d2f5 JH |
507 | if (!*list || (*list)->token != GREP_CLOSE_PAREN) |
508 | die("unmatched parenthesis"); | |
509 | *list = (*list)->next; | |
510 | return x; | |
511 | default: | |
512 | return NULL; | |
513 | } | |
514 | } | |
515 | ||
516 | static struct grep_expr *compile_pattern_not(struct grep_pat **list) | |
517 | { | |
518 | struct grep_pat *p; | |
519 | struct grep_expr *x; | |
520 | ||
521 | p = *list; | |
c922b01f LT |
522 | if (!p) |
523 | return NULL; | |
83b5d2f5 JH |
524 | switch (p->token) { |
525 | case GREP_NOT: | |
526 | if (!p->next) | |
527 | die("--not not followed by pattern expression"); | |
528 | *list = p->next; | |
529 | x = xcalloc(1, sizeof (struct grep_expr)); | |
530 | x->node = GREP_NODE_NOT; | |
531 | x->u.unary = compile_pattern_not(list); | |
532 | if (!x->u.unary) | |
533 | die("--not followed by non pattern expression"); | |
534 | return x; | |
535 | default: | |
536 | return compile_pattern_atom(list); | |
537 | } | |
538 | } | |
539 | ||
540 | static struct grep_expr *compile_pattern_and(struct grep_pat **list) | |
541 | { | |
542 | struct grep_pat *p; | |
543 | struct grep_expr *x, *y, *z; | |
544 | ||
545 | x = compile_pattern_not(list); | |
546 | p = *list; | |
547 | if (p && p->token == GREP_AND) { | |
548 | if (!p->next) | |
549 | die("--and not followed by pattern expression"); | |
550 | *list = p->next; | |
551 | y = compile_pattern_and(list); | |
552 | if (!y) | |
553 | die("--and not followed by pattern expression"); | |
554 | z = xcalloc(1, sizeof (struct grep_expr)); | |
555 | z->node = GREP_NODE_AND; | |
556 | z->u.binary.left = x; | |
557 | z->u.binary.right = y; | |
558 | return z; | |
559 | } | |
560 | return x; | |
561 | } | |
562 | ||
563 | static struct grep_expr *compile_pattern_or(struct grep_pat **list) | |
564 | { | |
565 | struct grep_pat *p; | |
566 | struct grep_expr *x, *y, *z; | |
567 | ||
568 | x = compile_pattern_and(list); | |
569 | p = *list; | |
570 | if (x && p && p->token != GREP_CLOSE_PAREN) { | |
571 | y = compile_pattern_or(list); | |
572 | if (!y) | |
573 | die("not a pattern expression %s", p->pattern); | |
574 | z = xcalloc(1, sizeof (struct grep_expr)); | |
575 | z->node = GREP_NODE_OR; | |
576 | z->u.binary.left = x; | |
577 | z->u.binary.right = y; | |
578 | return z; | |
579 | } | |
580 | return x; | |
581 | } | |
582 | ||
583 | static struct grep_expr *compile_pattern_expr(struct grep_pat **list) | |
584 | { | |
585 | return compile_pattern_or(list); | |
586 | } | |
587 | ||
17bf35a3 JH |
588 | static void indent(int in) |
589 | { | |
590 | while (in-- > 0) | |
591 | fputc(' ', stderr); | |
592 | } | |
593 | ||
594 | static void dump_grep_pat(struct grep_pat *p) | |
595 | { | |
596 | switch (p->token) { | |
597 | case GREP_AND: fprintf(stderr, "*and*"); break; | |
598 | case GREP_OPEN_PAREN: fprintf(stderr, "*(*"); break; | |
599 | case GREP_CLOSE_PAREN: fprintf(stderr, "*)*"); break; | |
600 | case GREP_NOT: fprintf(stderr, "*not*"); break; | |
601 | case GREP_OR: fprintf(stderr, "*or*"); break; | |
602 | ||
603 | case GREP_PATTERN: fprintf(stderr, "pattern"); break; | |
604 | case GREP_PATTERN_HEAD: fprintf(stderr, "pattern_head"); break; | |
605 | case GREP_PATTERN_BODY: fprintf(stderr, "pattern_body"); break; | |
606 | } | |
607 | ||
608 | switch (p->token) { | |
609 | default: break; | |
610 | case GREP_PATTERN_HEAD: | |
611 | fprintf(stderr, "<head %d>", p->field); break; | |
612 | case GREP_PATTERN_BODY: | |
613 | fprintf(stderr, "<body>"); break; | |
614 | } | |
615 | switch (p->token) { | |
616 | default: break; | |
617 | case GREP_PATTERN_HEAD: | |
618 | case GREP_PATTERN_BODY: | |
619 | case GREP_PATTERN: | |
620 | fprintf(stderr, "%.*s", (int)p->patternlen, p->pattern); | |
621 | break; | |
622 | } | |
623 | fputc('\n', stderr); | |
624 | } | |
625 | ||
626 | static void dump_grep_expression_1(struct grep_expr *x, int in) | |
627 | { | |
628 | indent(in); | |
629 | switch (x->node) { | |
630 | case GREP_NODE_TRUE: | |
631 | fprintf(stderr, "true\n"); | |
632 | break; | |
633 | case GREP_NODE_ATOM: | |
634 | dump_grep_pat(x->u.atom); | |
635 | break; | |
636 | case GREP_NODE_NOT: | |
637 | fprintf(stderr, "(not\n"); | |
638 | dump_grep_expression_1(x->u.unary, in+1); | |
639 | indent(in); | |
640 | fprintf(stderr, ")\n"); | |
641 | break; | |
642 | case GREP_NODE_AND: | |
643 | fprintf(stderr, "(and\n"); | |
644 | dump_grep_expression_1(x->u.binary.left, in+1); | |
645 | dump_grep_expression_1(x->u.binary.right, in+1); | |
646 | indent(in); | |
647 | fprintf(stderr, ")\n"); | |
648 | break; | |
649 | case GREP_NODE_OR: | |
650 | fprintf(stderr, "(or\n"); | |
651 | dump_grep_expression_1(x->u.binary.left, in+1); | |
652 | dump_grep_expression_1(x->u.binary.right, in+1); | |
653 | indent(in); | |
654 | fprintf(stderr, ")\n"); | |
655 | break; | |
656 | } | |
657 | } | |
658 | ||
07a7d656 | 659 | static void dump_grep_expression(struct grep_opt *opt) |
17bf35a3 JH |
660 | { |
661 | struct grep_expr *x = opt->pattern_expression; | |
662 | ||
663 | if (opt->all_match) | |
664 | fprintf(stderr, "[all-match]\n"); | |
665 | dump_grep_expression_1(x, 0); | |
666 | fflush(NULL); | |
667 | } | |
668 | ||
5aaeb733 JH |
669 | static struct grep_expr *grep_true_expr(void) |
670 | { | |
671 | struct grep_expr *z = xcalloc(1, sizeof(*z)); | |
672 | z->node = GREP_NODE_TRUE; | |
673 | return z; | |
674 | } | |
675 | ||
676 | static struct grep_expr *grep_or_expr(struct grep_expr *left, struct grep_expr *right) | |
677 | { | |
678 | struct grep_expr *z = xcalloc(1, sizeof(*z)); | |
679 | z->node = GREP_NODE_OR; | |
680 | z->u.binary.left = left; | |
681 | z->u.binary.right = right; | |
682 | return z; | |
683 | } | |
684 | ||
95ce9ce2 | 685 | static struct grep_expr *prep_header_patterns(struct grep_opt *opt) |
83b5d2f5 JH |
686 | { |
687 | struct grep_pat *p; | |
95ce9ce2 | 688 | struct grep_expr *header_expr; |
5aaeb733 JH |
689 | struct grep_expr *(header_group[GREP_HEADER_FIELD_MAX]); |
690 | enum grep_header_field fld; | |
83b5d2f5 | 691 | |
95ce9ce2 JH |
692 | if (!opt->header_list) |
693 | return NULL; | |
2385f246 | 694 | |
95ce9ce2 JH |
695 | for (p = opt->header_list; p; p = p->next) { |
696 | if (p->token != GREP_PATTERN_HEAD) | |
697 | die("bug: a non-header pattern in grep header list."); | |
3ce3ffb8 AP |
698 | if (p->field < GREP_HEADER_FIELD_MIN || |
699 | GREP_HEADER_FIELD_MAX <= p->field) | |
95ce9ce2 JH |
700 | die("bug: unknown header field %d", p->field); |
701 | compile_regexp(p, opt); | |
80235ba7 | 702 | } |
5aaeb733 JH |
703 | |
704 | for (fld = 0; fld < GREP_HEADER_FIELD_MAX; fld++) | |
705 | header_group[fld] = NULL; | |
706 | ||
707 | for (p = opt->header_list; p; p = p->next) { | |
708 | struct grep_expr *h; | |
709 | struct grep_pat *pp = p; | |
710 | ||
711 | h = compile_pattern_atom(&pp); | |
712 | if (!h || pp != p->next) | |
713 | die("bug: malformed header expr"); | |
714 | if (!header_group[p->field]) { | |
715 | header_group[p->field] = h; | |
716 | continue; | |
717 | } | |
718 | header_group[p->field] = grep_or_expr(h, header_group[p->field]); | |
719 | } | |
720 | ||
721 | header_expr = NULL; | |
722 | ||
723 | for (fld = 0; fld < GREP_HEADER_FIELD_MAX; fld++) { | |
724 | if (!header_group[fld]) | |
725 | continue; | |
726 | if (!header_expr) | |
727 | header_expr = grep_true_expr(); | |
728 | header_expr = grep_or_expr(header_group[fld], header_expr); | |
729 | } | |
95ce9ce2 JH |
730 | return header_expr; |
731 | } | |
732 | ||
13e4fc7e JH |
733 | static struct grep_expr *grep_splice_or(struct grep_expr *x, struct grep_expr *y) |
734 | { | |
735 | struct grep_expr *z = x; | |
736 | ||
737 | while (x) { | |
738 | assert(x->node == GREP_NODE_OR); | |
739 | if (x->u.binary.right && | |
740 | x->u.binary.right->node == GREP_NODE_TRUE) { | |
741 | x->u.binary.right = y; | |
742 | break; | |
743 | } | |
744 | x = x->u.binary.right; | |
745 | } | |
746 | return z; | |
747 | } | |
748 | ||
17bf35a3 | 749 | static void compile_grep_patterns_real(struct grep_opt *opt) |
95ce9ce2 JH |
750 | { |
751 | struct grep_pat *p; | |
752 | struct grep_expr *header_expr = prep_header_patterns(opt); | |
0ab7befa | 753 | |
83b5d2f5 | 754 | for (p = opt->pattern_list; p; p = p->next) { |
480c1ca6 JH |
755 | switch (p->token) { |
756 | case GREP_PATTERN: /* atom */ | |
757 | case GREP_PATTERN_HEAD: | |
758 | case GREP_PATTERN_BODY: | |
c822255c | 759 | compile_regexp(p, opt); |
480c1ca6 JH |
760 | break; |
761 | default: | |
83b5d2f5 | 762 | opt->extended = 1; |
480c1ca6 JH |
763 | break; |
764 | } | |
83b5d2f5 JH |
765 | } |
766 | ||
80235ba7 JH |
767 | if (opt->all_match || header_expr) |
768 | opt->extended = 1; | |
17bf35a3 | 769 | else if (!opt->extended && !opt->debug) |
83b5d2f5 JH |
770 | return; |
771 | ||
83b5d2f5 | 772 | p = opt->pattern_list; |
ba150a3f MB |
773 | if (p) |
774 | opt->pattern_expression = compile_pattern_expr(&p); | |
83b5d2f5 JH |
775 | if (p) |
776 | die("incomplete pattern expression: %s", p->pattern); | |
80235ba7 JH |
777 | |
778 | if (!header_expr) | |
779 | return; | |
780 | ||
5aaeb733 | 781 | if (!opt->pattern_expression) |
80235ba7 | 782 | opt->pattern_expression = header_expr; |
13e4fc7e JH |
783 | else if (opt->all_match) |
784 | opt->pattern_expression = grep_splice_or(header_expr, | |
785 | opt->pattern_expression); | |
5aaeb733 JH |
786 | else |
787 | opt->pattern_expression = grep_or_expr(opt->pattern_expression, | |
788 | header_expr); | |
80235ba7 | 789 | opt->all_match = 1; |
83b5d2f5 JH |
790 | } |
791 | ||
17bf35a3 JH |
792 | void compile_grep_patterns(struct grep_opt *opt) |
793 | { | |
794 | compile_grep_patterns_real(opt); | |
795 | if (opt->debug) | |
796 | dump_grep_expression(opt); | |
797 | } | |
798 | ||
b48fb5b6 JH |
799 | static void free_pattern_expr(struct grep_expr *x) |
800 | { | |
801 | switch (x->node) { | |
5aaeb733 | 802 | case GREP_NODE_TRUE: |
b48fb5b6 JH |
803 | case GREP_NODE_ATOM: |
804 | break; | |
805 | case GREP_NODE_NOT: | |
806 | free_pattern_expr(x->u.unary); | |
807 | break; | |
808 | case GREP_NODE_AND: | |
809 | case GREP_NODE_OR: | |
810 | free_pattern_expr(x->u.binary.left); | |
811 | free_pattern_expr(x->u.binary.right); | |
812 | break; | |
813 | } | |
814 | free(x); | |
815 | } | |
816 | ||
817 | void free_grep_patterns(struct grep_opt *opt) | |
818 | { | |
819 | struct grep_pat *p, *n; | |
820 | ||
821 | for (p = opt->pattern_list; p; p = n) { | |
822 | n = p->next; | |
823 | switch (p->token) { | |
824 | case GREP_PATTERN: /* atom */ | |
825 | case GREP_PATTERN_HEAD: | |
826 | case GREP_PATTERN_BODY: | |
9eceddee FK |
827 | if (p->kws) |
828 | kwsfree(p->kws); | |
829 | else if (p->pcre_regexp) | |
63e7e9d8 MK |
830 | free_pcre_regexp(p); |
831 | else | |
832 | regfree(&p->regexp); | |
526a858a | 833 | free(p->pattern); |
b48fb5b6 JH |
834 | break; |
835 | default: | |
836 | break; | |
837 | } | |
838 | free(p); | |
839 | } | |
840 | ||
841 | if (!opt->extended) | |
842 | return; | |
843 | free_pattern_expr(opt->pattern_expression); | |
844 | } | |
845 | ||
83b5d2f5 JH |
846 | static char *end_of_line(char *cp, unsigned long *left) |
847 | { | |
848 | unsigned long l = *left; | |
849 | while (l && *cp != '\n') { | |
850 | l--; | |
851 | cp++; | |
852 | } | |
853 | *left = l; | |
854 | return cp; | |
855 | } | |
856 | ||
857 | static int word_char(char ch) | |
858 | { | |
859 | return isalnum(ch) || ch == '_'; | |
860 | } | |
861 | ||
55f638bd ML |
862 | static void output_color(struct grep_opt *opt, const void *data, size_t size, |
863 | const char *color) | |
864 | { | |
daa0c3d9 | 865 | if (want_color(opt->color) && color && color[0]) { |
55f638bd ML |
866 | opt->output(opt, color, strlen(color)); |
867 | opt->output(opt, data, size); | |
868 | opt->output(opt, GIT_COLOR_RESET, strlen(GIT_COLOR_RESET)); | |
869 | } else | |
870 | opt->output(opt, data, size); | |
871 | } | |
872 | ||
873 | static void output_sep(struct grep_opt *opt, char sign) | |
874 | { | |
875 | if (opt->null_following_name) | |
876 | opt->output(opt, "\0", 1); | |
877 | else | |
878 | output_color(opt, &sign, 1, opt->color_sep); | |
879 | } | |
880 | ||
83caecca RZ |
881 | static void show_name(struct grep_opt *opt, const char *name) |
882 | { | |
55f638bd | 883 | output_color(opt, name, strlen(name), opt->color_filename); |
5b594f45 | 884 | opt->output(opt, opt->null_following_name ? "\0" : "\n", 1); |
83caecca RZ |
885 | } |
886 | ||
ed40a095 RS |
887 | static int fixmatch(struct grep_pat *p, char *line, char *eol, |
888 | regmatch_t *match) | |
83b5d2f5 | 889 | { |
9eceddee FK |
890 | struct kwsmatch kwsm; |
891 | size_t offset = kwsexec(p->kws, line, eol - line, &kwsm); | |
892 | if (offset == -1) { | |
83b5d2f5 JH |
893 | match->rm_so = match->rm_eo = -1; |
894 | return REG_NOMATCH; | |
9eceddee FK |
895 | } else { |
896 | match->rm_so = offset; | |
897 | match->rm_eo = match->rm_so + kwsm.size[0]; | |
83b5d2f5 JH |
898 | return 0; |
899 | } | |
900 | } | |
901 | ||
f96e5673 RS |
902 | static int regmatch(const regex_t *preg, char *line, char *eol, |
903 | regmatch_t *match, int eflags) | |
904 | { | |
905 | #ifdef REG_STARTEND | |
906 | match->rm_so = 0; | |
907 | match->rm_eo = eol - line; | |
908 | eflags |= REG_STARTEND; | |
909 | #endif | |
910 | return regexec(preg, line, 1, match, eflags); | |
911 | } | |
912 | ||
97e77784 MK |
913 | static int patmatch(struct grep_pat *p, char *line, char *eol, |
914 | regmatch_t *match, int eflags) | |
915 | { | |
916 | int hit; | |
917 | ||
918 | if (p->fixed) | |
919 | hit = !fixmatch(p, line, eol, match); | |
63e7e9d8 MK |
920 | else if (p->pcre_regexp) |
921 | hit = !pcrematch(p, line, eol, match, eflags); | |
97e77784 MK |
922 | else |
923 | hit = !regmatch(&p->regexp, line, eol, match, eflags); | |
924 | ||
925 | return hit; | |
926 | } | |
927 | ||
a4d7d2c6 JH |
928 | static int strip_timestamp(char *bol, char **eol_p) |
929 | { | |
930 | char *eol = *eol_p; | |
931 | int ch; | |
932 | ||
933 | while (bol < --eol) { | |
934 | if (*eol != '>') | |
935 | continue; | |
936 | *eol_p = ++eol; | |
937 | ch = *eol; | |
938 | *eol = '\0'; | |
939 | return ch; | |
940 | } | |
941 | return 0; | |
942 | } | |
943 | ||
944 | static struct { | |
945 | const char *field; | |
946 | size_t len; | |
947 | } header_field[] = { | |
948 | { "author ", 7 }, | |
949 | { "committer ", 10 }, | |
72fd13f7 | 950 | { "reflog ", 7 }, |
a4d7d2c6 JH |
951 | }; |
952 | ||
d7eb527d | 953 | static int match_one_pattern(struct grep_pat *p, char *bol, char *eol, |
79212772 RS |
954 | enum grep_context ctx, |
955 | regmatch_t *pmatch, int eflags) | |
83b5d2f5 JH |
956 | { |
957 | int hit = 0; | |
a4d7d2c6 | 958 | int saved_ch = 0; |
e701fadb | 959 | const char *start = bol; |
83b5d2f5 | 960 | |
480c1ca6 JH |
961 | if ((p->token != GREP_PATTERN) && |
962 | ((p->token == GREP_PATTERN_HEAD) != (ctx == GREP_CONTEXT_HEAD))) | |
963 | return 0; | |
964 | ||
a4d7d2c6 JH |
965 | if (p->token == GREP_PATTERN_HEAD) { |
966 | const char *field; | |
967 | size_t len; | |
968 | assert(p->field < ARRAY_SIZE(header_field)); | |
969 | field = header_field[p->field].field; | |
970 | len = header_field[p->field].len; | |
971 | if (strncmp(bol, field, len)) | |
972 | return 0; | |
973 | bol += len; | |
ad4813b3 NTND |
974 | switch (p->field) { |
975 | case GREP_HEADER_AUTHOR: | |
976 | case GREP_HEADER_COMMITTER: | |
977 | saved_ch = strip_timestamp(bol, &eol); | |
978 | break; | |
979 | default: | |
980 | break; | |
981 | } | |
a4d7d2c6 JH |
982 | } |
983 | ||
83b5d2f5 | 984 | again: |
97e77784 | 985 | hit = patmatch(p, bol, eol, pmatch, eflags); |
83b5d2f5 | 986 | |
d7eb527d | 987 | if (hit && p->word_regexp) { |
83b5d2f5 | 988 | if ((pmatch[0].rm_so < 0) || |
84201eae | 989 | (eol - bol) < pmatch[0].rm_so || |
83b5d2f5 JH |
990 | (pmatch[0].rm_eo < 0) || |
991 | (eol - bol) < pmatch[0].rm_eo) | |
992 | die("regexp returned nonsense"); | |
993 | ||
994 | /* Match beginning must be either beginning of the | |
995 | * line, or at word boundary (i.e. the last char must | |
996 | * not be a word char). Similarly, match end must be | |
997 | * either end of the line, or at word boundary | |
998 | * (i.e. the next char must not be a word char). | |
999 | */ | |
fb62eb7f | 1000 | if ( ((pmatch[0].rm_so == 0) || |
83b5d2f5 JH |
1001 | !word_char(bol[pmatch[0].rm_so-1])) && |
1002 | ((pmatch[0].rm_eo == (eol-bol)) || | |
1003 | !word_char(bol[pmatch[0].rm_eo])) ) | |
1004 | ; | |
1005 | else | |
1006 | hit = 0; | |
1007 | ||
84201eae RS |
1008 | /* Words consist of at least one character. */ |
1009 | if (pmatch->rm_so == pmatch->rm_eo) | |
1010 | hit = 0; | |
1011 | ||
83b5d2f5 JH |
1012 | if (!hit && pmatch[0].rm_so + bol + 1 < eol) { |
1013 | /* There could be more than one match on the | |
1014 | * line, and the first match might not be | |
1015 | * strict word match. But later ones could be! | |
fb62eb7f RS |
1016 | * Forward to the next possible start, i.e. the |
1017 | * next position following a non-word char. | |
83b5d2f5 JH |
1018 | */ |
1019 | bol = pmatch[0].rm_so + bol + 1; | |
fb62eb7f RS |
1020 | while (word_char(bol[-1]) && bol < eol) |
1021 | bol++; | |
dbb6a4ad | 1022 | eflags |= REG_NOTBOL; |
fb62eb7f RS |
1023 | if (bol < eol) |
1024 | goto again; | |
83b5d2f5 JH |
1025 | } |
1026 | } | |
a4d7d2c6 JH |
1027 | if (p->token == GREP_PATTERN_HEAD && saved_ch) |
1028 | *eol = saved_ch; | |
e701fadb RS |
1029 | if (hit) { |
1030 | pmatch[0].rm_so += bol - start; | |
1031 | pmatch[0].rm_eo += bol - start; | |
1032 | } | |
83b5d2f5 JH |
1033 | return hit; |
1034 | } | |
1035 | ||
d7eb527d RS |
1036 | static int match_expr_eval(struct grep_expr *x, char *bol, char *eol, |
1037 | enum grep_context ctx, int collect_hits) | |
83b5d2f5 | 1038 | { |
0ab7befa | 1039 | int h = 0; |
79212772 | 1040 | regmatch_t match; |
0ab7befa | 1041 | |
c922b01f LT |
1042 | if (!x) |
1043 | die("Not a valid grep expression"); | |
83b5d2f5 | 1044 | switch (x->node) { |
5aaeb733 JH |
1045 | case GREP_NODE_TRUE: |
1046 | h = 1; | |
1047 | break; | |
83b5d2f5 | 1048 | case GREP_NODE_ATOM: |
79212772 | 1049 | h = match_one_pattern(x->u.atom, bol, eol, ctx, &match, 0); |
83b5d2f5 JH |
1050 | break; |
1051 | case GREP_NODE_NOT: | |
d7eb527d | 1052 | h = !match_expr_eval(x->u.unary, bol, eol, ctx, 0); |
0ab7befa | 1053 | break; |
83b5d2f5 | 1054 | case GREP_NODE_AND: |
d7eb527d | 1055 | if (!match_expr_eval(x->u.binary.left, bol, eol, ctx, 0)) |
252d560d | 1056 | return 0; |
d7eb527d | 1057 | h = match_expr_eval(x->u.binary.right, bol, eol, ctx, 0); |
0ab7befa | 1058 | break; |
83b5d2f5 | 1059 | case GREP_NODE_OR: |
0ab7befa | 1060 | if (!collect_hits) |
d7eb527d | 1061 | return (match_expr_eval(x->u.binary.left, |
0ab7befa | 1062 | bol, eol, ctx, 0) || |
d7eb527d | 1063 | match_expr_eval(x->u.binary.right, |
0ab7befa | 1064 | bol, eol, ctx, 0)); |
d7eb527d | 1065 | h = match_expr_eval(x->u.binary.left, bol, eol, ctx, 0); |
0ab7befa | 1066 | x->u.binary.left->hit |= h; |
d7eb527d | 1067 | h |= match_expr_eval(x->u.binary.right, bol, eol, ctx, 1); |
0ab7befa JH |
1068 | break; |
1069 | default: | |
d7530708 | 1070 | die("Unexpected node type (internal error) %d", x->node); |
83b5d2f5 | 1071 | } |
0ab7befa JH |
1072 | if (collect_hits) |
1073 | x->hit |= h; | |
1074 | return h; | |
83b5d2f5 JH |
1075 | } |
1076 | ||
480c1ca6 | 1077 | static int match_expr(struct grep_opt *opt, char *bol, char *eol, |
0ab7befa | 1078 | enum grep_context ctx, int collect_hits) |
83b5d2f5 JH |
1079 | { |
1080 | struct grep_expr *x = opt->pattern_expression; | |
d7eb527d | 1081 | return match_expr_eval(x, bol, eol, ctx, collect_hits); |
83b5d2f5 JH |
1082 | } |
1083 | ||
480c1ca6 | 1084 | static int match_line(struct grep_opt *opt, char *bol, char *eol, |
0ab7befa | 1085 | enum grep_context ctx, int collect_hits) |
83b5d2f5 JH |
1086 | { |
1087 | struct grep_pat *p; | |
79212772 RS |
1088 | regmatch_t match; |
1089 | ||
83b5d2f5 | 1090 | if (opt->extended) |
0ab7befa JH |
1091 | return match_expr(opt, bol, eol, ctx, collect_hits); |
1092 | ||
1093 | /* we do not call with collect_hits without being extended */ | |
83b5d2f5 | 1094 | for (p = opt->pattern_list; p; p = p->next) { |
79212772 | 1095 | if (match_one_pattern(p, bol, eol, ctx, &match, 0)) |
83b5d2f5 JH |
1096 | return 1; |
1097 | } | |
1098 | return 0; | |
1099 | } | |
1100 | ||
7e8f59d5 RS |
1101 | static int match_next_pattern(struct grep_pat *p, char *bol, char *eol, |
1102 | enum grep_context ctx, | |
1103 | regmatch_t *pmatch, int eflags) | |
1104 | { | |
1105 | regmatch_t match; | |
1106 | ||
1107 | if (!match_one_pattern(p, bol, eol, ctx, &match, eflags)) | |
1108 | return 0; | |
1109 | if (match.rm_so < 0 || match.rm_eo < 0) | |
1110 | return 0; | |
1111 | if (pmatch->rm_so >= 0 && pmatch->rm_eo >= 0) { | |
1112 | if (match.rm_so > pmatch->rm_so) | |
1113 | return 1; | |
1114 | if (match.rm_so == pmatch->rm_so && match.rm_eo < pmatch->rm_eo) | |
1115 | return 1; | |
1116 | } | |
1117 | pmatch->rm_so = match.rm_so; | |
1118 | pmatch->rm_eo = match.rm_eo; | |
1119 | return 1; | |
1120 | } | |
1121 | ||
1122 | static int next_match(struct grep_opt *opt, char *bol, char *eol, | |
1123 | enum grep_context ctx, regmatch_t *pmatch, int eflags) | |
1124 | { | |
1125 | struct grep_pat *p; | |
1126 | int hit = 0; | |
1127 | ||
1128 | pmatch->rm_so = pmatch->rm_eo = -1; | |
1129 | if (bol < eol) { | |
1130 | for (p = opt->pattern_list; p; p = p->next) { | |
1131 | switch (p->token) { | |
1132 | case GREP_PATTERN: /* atom */ | |
1133 | case GREP_PATTERN_HEAD: | |
1134 | case GREP_PATTERN_BODY: | |
1135 | hit |= match_next_pattern(p, bol, eol, ctx, | |
1136 | pmatch, eflags); | |
1137 | break; | |
1138 | default: | |
1139 | break; | |
1140 | } | |
1141 | } | |
1142 | } | |
1143 | return hit; | |
1144 | } | |
1145 | ||
1146 | static void show_line(struct grep_opt *opt, char *bol, char *eol, | |
1147 | const char *name, unsigned lno, char sign) | |
1148 | { | |
1149 | int rest = eol - bol; | |
79a77109 | 1150 | const char *match_color, *line_color = NULL; |
7e8f59d5 | 1151 | |
a8f0e764 RS |
1152 | if (opt->file_break && opt->last_shown == 0) { |
1153 | if (opt->show_hunk_mark) | |
1154 | opt->output(opt, "\n", 1); | |
ba8ea749 | 1155 | } else if (opt->pre_context || opt->post_context || opt->funcbody) { |
046802d0 | 1156 | if (opt->last_shown == 0) { |
55f638bd ML |
1157 | if (opt->show_hunk_mark) { |
1158 | output_color(opt, "--", 2, opt->color_sep); | |
1159 | opt->output(opt, "\n", 1); | |
07b838f0 | 1160 | } |
55f638bd ML |
1161 | } else if (lno > opt->last_shown + 1) { |
1162 | output_color(opt, "--", 2, opt->color_sep); | |
1163 | opt->output(opt, "\n", 1); | |
1164 | } | |
5dd06d38 | 1165 | } |
1d84f72e RS |
1166 | if (opt->heading && opt->last_shown == 0) { |
1167 | output_color(opt, name, strlen(name), opt->color_filename); | |
1168 | opt->output(opt, "\n", 1); | |
1169 | } | |
5dd06d38 RS |
1170 | opt->last_shown = lno; |
1171 | ||
1d84f72e | 1172 | if (!opt->heading && opt->pathname) { |
55f638bd ML |
1173 | output_color(opt, name, strlen(name), opt->color_filename); |
1174 | output_sep(opt, sign); | |
5b594f45 FK |
1175 | } |
1176 | if (opt->linenum) { | |
1177 | char buf[32]; | |
1178 | snprintf(buf, sizeof(buf), "%d", lno); | |
55f638bd ML |
1179 | output_color(opt, buf, strlen(buf), opt->color_lineno); |
1180 | output_sep(opt, sign); | |
5b594f45 | 1181 | } |
7e8f59d5 RS |
1182 | if (opt->color) { |
1183 | regmatch_t match; | |
1184 | enum grep_context ctx = GREP_CONTEXT_BODY; | |
1185 | int ch = *eol; | |
1186 | int eflags = 0; | |
1187 | ||
79a77109 RS |
1188 | if (sign == ':') |
1189 | match_color = opt->color_match_selected; | |
1190 | else | |
1191 | match_color = opt->color_match_context; | |
00588bb5 ML |
1192 | if (sign == ':') |
1193 | line_color = opt->color_selected; | |
1194 | else if (sign == '-') | |
1195 | line_color = opt->color_context; | |
1196 | else if (sign == '=') | |
1197 | line_color = opt->color_function; | |
7e8f59d5 RS |
1198 | *eol = '\0'; |
1199 | while (next_match(opt, bol, eol, ctx, &match, eflags)) { | |
1f5b9cc4 RS |
1200 | if (match.rm_so == match.rm_eo) |
1201 | break; | |
5b594f45 | 1202 | |
00588bb5 | 1203 | output_color(opt, bol, match.rm_so, line_color); |
55f638bd | 1204 | output_color(opt, bol + match.rm_so, |
79a77109 | 1205 | match.rm_eo - match.rm_so, match_color); |
7e8f59d5 RS |
1206 | bol += match.rm_eo; |
1207 | rest -= match.rm_eo; | |
1208 | eflags = REG_NOTBOL; | |
1209 | } | |
1210 | *eol = ch; | |
1211 | } | |
00588bb5 | 1212 | output_color(opt, bol, rest, line_color); |
5b594f45 | 1213 | opt->output(opt, "\n", 1); |
7e8f59d5 RS |
1214 | } |
1215 | ||
0579f91d | 1216 | #ifndef NO_PTHREADS |
78db6ea9 JK |
1217 | int grep_use_locks; |
1218 | ||
0579f91d TR |
1219 | /* |
1220 | * This lock protects access to the gitattributes machinery, which is | |
1221 | * not thread-safe. | |
1222 | */ | |
1223 | pthread_mutex_t grep_attr_mutex; | |
1224 | ||
78db6ea9 | 1225 | static inline void grep_attr_lock(void) |
0579f91d | 1226 | { |
78db6ea9 | 1227 | if (grep_use_locks) |
0579f91d TR |
1228 | pthread_mutex_lock(&grep_attr_mutex); |
1229 | } | |
1230 | ||
78db6ea9 | 1231 | static inline void grep_attr_unlock(void) |
0579f91d | 1232 | { |
78db6ea9 | 1233 | if (grep_use_locks) |
0579f91d TR |
1234 | pthread_mutex_unlock(&grep_attr_mutex); |
1235 | } | |
b3aeb285 JK |
1236 | |
1237 | /* | |
1238 | * Same as git_attr_mutex, but protecting the thread-unsafe object db access. | |
1239 | */ | |
1240 | pthread_mutex_t grep_read_mutex; | |
1241 | ||
0579f91d | 1242 | #else |
78db6ea9 JK |
1243 | #define grep_attr_lock() |
1244 | #define grep_attr_unlock() | |
0579f91d TR |
1245 | #endif |
1246 | ||
e1327023 | 1247 | static int match_funcname(struct grep_opt *opt, struct grep_source *gs, char *bol, char *eol) |
2944e4e6 | 1248 | { |
60ecac98 | 1249 | xdemitconf_t *xecfg = opt->priv; |
0579f91d | 1250 | if (xecfg && !xecfg->find_func) { |
94ad9d9e JK |
1251 | grep_source_load_driver(gs); |
1252 | if (gs->driver->funcname.pattern) { | |
1253 | const struct userdiff_funcname *pe = &gs->driver->funcname; | |
0579f91d TR |
1254 | xdiff_set_find_func(xecfg, pe->pattern, pe->cflags); |
1255 | } else { | |
1256 | xecfg = opt->priv = NULL; | |
1257 | } | |
1258 | } | |
1259 | ||
1260 | if (xecfg) { | |
60ecac98 RS |
1261 | char buf[1]; |
1262 | return xecfg->find_func(bol, eol - bol, buf, 1, | |
1263 | xecfg->find_func_priv) >= 0; | |
1264 | } | |
1265 | ||
2944e4e6 RS |
1266 | if (bol == eol) |
1267 | return 0; | |
1268 | if (isalpha(*bol) || *bol == '_' || *bol == '$') | |
1269 | return 1; | |
1270 | return 0; | |
1271 | } | |
1272 | ||
e1327023 JK |
1273 | static void show_funcname_line(struct grep_opt *opt, struct grep_source *gs, |
1274 | char *bol, unsigned lno) | |
2944e4e6 | 1275 | { |
e1327023 | 1276 | while (bol > gs->buf) { |
2944e4e6 RS |
1277 | char *eol = --bol; |
1278 | ||
e1327023 | 1279 | while (bol > gs->buf && bol[-1] != '\n') |
2944e4e6 RS |
1280 | bol--; |
1281 | lno--; | |
1282 | ||
1283 | if (lno <= opt->last_shown) | |
1284 | break; | |
1285 | ||
e1327023 JK |
1286 | if (match_funcname(opt, gs, bol, eol)) { |
1287 | show_line(opt, bol, eol, gs->name, lno, '='); | |
2944e4e6 RS |
1288 | break; |
1289 | } | |
1290 | } | |
1291 | } | |
1292 | ||
e1327023 | 1293 | static void show_pre_context(struct grep_opt *opt, struct grep_source *gs, |
ba8ea749 | 1294 | char *bol, char *end, unsigned lno) |
49de3216 | 1295 | { |
2944e4e6 | 1296 | unsigned cur = lno, from = 1, funcname_lno = 0; |
ba8ea749 RS |
1297 | int funcname_needed = !!opt->funcname; |
1298 | ||
e1327023 | 1299 | if (opt->funcbody && !match_funcname(opt, gs, bol, end)) |
ba8ea749 | 1300 | funcname_needed = 2; |
49de3216 RS |
1301 | |
1302 | if (opt->pre_context < lno) | |
1303 | from = lno - opt->pre_context; | |
1304 | if (from <= opt->last_shown) | |
1305 | from = opt->last_shown + 1; | |
1306 | ||
1307 | /* Rewind. */ | |
e1327023 | 1308 | while (bol > gs->buf && |
ba8ea749 | 1309 | cur > (funcname_needed == 2 ? opt->last_shown + 1 : from)) { |
2944e4e6 RS |
1310 | char *eol = --bol; |
1311 | ||
e1327023 | 1312 | while (bol > gs->buf && bol[-1] != '\n') |
49de3216 RS |
1313 | bol--; |
1314 | cur--; | |
e1327023 | 1315 | if (funcname_needed && match_funcname(opt, gs, bol, eol)) { |
2944e4e6 RS |
1316 | funcname_lno = cur; |
1317 | funcname_needed = 0; | |
1318 | } | |
49de3216 RS |
1319 | } |
1320 | ||
2944e4e6 RS |
1321 | /* We need to look even further back to find a function signature. */ |
1322 | if (opt->funcname && funcname_needed) | |
e1327023 | 1323 | show_funcname_line(opt, gs, bol, cur); |
2944e4e6 | 1324 | |
49de3216 RS |
1325 | /* Back forward. */ |
1326 | while (cur < lno) { | |
2944e4e6 | 1327 | char *eol = bol, sign = (cur == funcname_lno) ? '=' : '-'; |
49de3216 RS |
1328 | |
1329 | while (*eol != '\n') | |
1330 | eol++; | |
e1327023 | 1331 | show_line(opt, bol, eol, gs->name, cur, sign); |
49de3216 RS |
1332 | bol = eol + 1; |
1333 | cur++; | |
1334 | } | |
1335 | } | |
1336 | ||
a26345b6 JH |
1337 | static int should_lookahead(struct grep_opt *opt) |
1338 | { | |
1339 | struct grep_pat *p; | |
1340 | ||
1341 | if (opt->extended) | |
1342 | return 0; /* punt for too complex stuff */ | |
1343 | if (opt->invert) | |
1344 | return 0; | |
1345 | for (p = opt->pattern_list; p; p = p->next) { | |
1346 | if (p->token != GREP_PATTERN) | |
1347 | return 0; /* punt for "header only" and stuff */ | |
1348 | } | |
1349 | return 1; | |
1350 | } | |
1351 | ||
1352 | static int look_ahead(struct grep_opt *opt, | |
1353 | unsigned long *left_p, | |
1354 | unsigned *lno_p, | |
1355 | char **bol_p) | |
1356 | { | |
1357 | unsigned lno = *lno_p; | |
1358 | char *bol = *bol_p; | |
1359 | struct grep_pat *p; | |
1360 | char *sp, *last_bol; | |
1361 | regoff_t earliest = -1; | |
1362 | ||
1363 | for (p = opt->pattern_list; p; p = p->next) { | |
1364 | int hit; | |
1365 | regmatch_t m; | |
1366 | ||
97e77784 | 1367 | hit = patmatch(p, bol, bol + *left_p, &m, 0); |
a26345b6 JH |
1368 | if (!hit || m.rm_so < 0 || m.rm_eo < 0) |
1369 | continue; | |
1370 | if (earliest < 0 || m.rm_so < earliest) | |
1371 | earliest = m.rm_so; | |
1372 | } | |
1373 | ||
1374 | if (earliest < 0) { | |
1375 | *bol_p = bol + *left_p; | |
1376 | *left_p = 0; | |
1377 | return 1; | |
1378 | } | |
1379 | for (sp = bol + earliest; bol < sp && sp[-1] != '\n'; sp--) | |
1380 | ; /* find the beginning of the line */ | |
1381 | last_bol = sp; | |
1382 | ||
1383 | for (sp = bol; sp < last_bol; sp++) { | |
1384 | if (*sp == '\n') | |
1385 | lno++; | |
1386 | } | |
1387 | *left_p -= last_bol - bol; | |
1388 | *bol_p = last_bol; | |
1389 | *lno_p = lno; | |
1390 | return 0; | |
1391 | } | |
1392 | ||
5b594f45 FK |
1393 | static void std_output(struct grep_opt *opt, const void *buf, size_t size) |
1394 | { | |
1395 | fwrite(buf, size, 1, stdout); | |
1396 | } | |
1397 | ||
335ec3bf JK |
1398 | static int fill_textconv_grep(struct userdiff_driver *driver, |
1399 | struct grep_source *gs) | |
1400 | { | |
1401 | struct diff_filespec *df; | |
1402 | char *buf; | |
1403 | size_t size; | |
1404 | ||
1405 | if (!driver || !driver->textconv) | |
1406 | return grep_source_load(gs); | |
1407 | ||
1408 | /* | |
1409 | * The textconv interface is intimately tied to diff_filespecs, so we | |
1410 | * have to pretend to be one. If we could unify the grep_source | |
1411 | * and diff_filespec structs, this mess could just go away. | |
1412 | */ | |
1413 | df = alloc_filespec(gs->path); | |
1414 | switch (gs->type) { | |
1415 | case GREP_SOURCE_SHA1: | |
1416 | fill_filespec(df, gs->identifier, 1, 0100644); | |
1417 | break; | |
1418 | case GREP_SOURCE_FILE: | |
1419 | fill_filespec(df, null_sha1, 0, 0100644); | |
1420 | break; | |
1421 | default: | |
1422 | die("BUG: attempt to textconv something without a path?"); | |
1423 | } | |
1424 | ||
1425 | /* | |
1426 | * fill_textconv is not remotely thread-safe; it may load objects | |
1427 | * behind the scenes, and it modifies the global diff tempfile | |
1428 | * structure. | |
1429 | */ | |
1430 | grep_read_lock(); | |
1431 | size = fill_textconv(driver, df, &buf); | |
1432 | grep_read_unlock(); | |
1433 | free_filespec(df); | |
1434 | ||
1435 | /* | |
1436 | * The normal fill_textconv usage by the diff machinery would just keep | |
1437 | * the textconv'd buf separate from the diff_filespec. But much of the | |
1438 | * grep code passes around a grep_source and assumes that its "buf" | |
1439 | * pointer is the beginning of the thing we are searching. So let's | |
1440 | * install our textconv'd version into the grep_source, taking care not | |
1441 | * to leak any existing buffer. | |
1442 | */ | |
1443 | grep_source_clear_data(gs); | |
1444 | gs->buf = buf; | |
1445 | gs->size = size; | |
1446 | ||
1447 | return 0; | |
1448 | } | |
1449 | ||
e1327023 | 1450 | static int grep_source_1(struct grep_opt *opt, struct grep_source *gs, int collect_hits) |
83b5d2f5 | 1451 | { |
e1327023 JK |
1452 | char *bol; |
1453 | unsigned long left; | |
83b5d2f5 | 1454 | unsigned lno = 1; |
83b5d2f5 | 1455 | unsigned last_hit = 0; |
83b5d2f5 | 1456 | int binary_match_only = 0; |
83b5d2f5 | 1457 | unsigned count = 0; |
a26345b6 | 1458 | int try_lookahead = 0; |
ba8ea749 | 1459 | int show_function = 0; |
335ec3bf | 1460 | struct userdiff_driver *textconv = NULL; |
480c1ca6 | 1461 | enum grep_context ctx = GREP_CONTEXT_HEAD; |
60ecac98 | 1462 | xdemitconf_t xecfg; |
83b5d2f5 | 1463 | |
5b594f45 FK |
1464 | if (!opt->output) |
1465 | opt->output = std_output; | |
1466 | ||
ba8ea749 RS |
1467 | if (opt->pre_context || opt->post_context || opt->file_break || |
1468 | opt->funcbody) { | |
08303c36 RS |
1469 | /* Show hunk marks, except for the first file. */ |
1470 | if (opt->last_shown) | |
1471 | opt->show_hunk_mark = 1; | |
1472 | /* | |
1473 | * If we're using threads then we can't easily identify | |
1474 | * the first file. Always put hunk marks in that case | |
1475 | * and skip the very first one later in work_done(). | |
1476 | */ | |
1477 | if (opt->output != std_output) | |
1478 | opt->show_hunk_mark = 1; | |
1479 | } | |
431d6e7b RS |
1480 | opt->last_shown = 0; |
1481 | ||
335ec3bf JK |
1482 | if (opt->allow_textconv) { |
1483 | grep_source_load_driver(gs); | |
1484 | /* | |
1485 | * We might set up the shared textconv cache data here, which | |
1486 | * is not thread-safe. | |
1487 | */ | |
1488 | grep_attr_lock(); | |
1489 | textconv = userdiff_get_textconv(gs->driver); | |
1490 | grep_attr_unlock(); | |
1491 | } | |
1492 | ||
1493 | /* | |
1494 | * We know the result of a textconv is text, so we only have to care | |
1495 | * about binary handling if we are not using it. | |
1496 | */ | |
1497 | if (!textconv) { | |
1498 | switch (opt->binary) { | |
1499 | case GREP_BINARY_DEFAULT: | |
1500 | if (grep_source_is_binary(gs)) | |
1501 | binary_match_only = 1; | |
1502 | break; | |
1503 | case GREP_BINARY_NOMATCH: | |
1504 | if (grep_source_is_binary(gs)) | |
1505 | return 0; /* Assume unmatch */ | |
1506 | break; | |
1507 | case GREP_BINARY_TEXT: | |
1508 | break; | |
1509 | default: | |
1510 | die("bug: unknown binary handling mode"); | |
1511 | } | |
83b5d2f5 JH |
1512 | } |
1513 | ||
60ecac98 | 1514 | memset(&xecfg, 0, sizeof(xecfg)); |
0579f91d TR |
1515 | opt->priv = &xecfg; |
1516 | ||
a26345b6 | 1517 | try_lookahead = should_lookahead(opt); |
60ecac98 | 1518 | |
335ec3bf | 1519 | if (fill_textconv_grep(textconv, gs) < 0) |
08265798 JK |
1520 | return 0; |
1521 | ||
e1327023 JK |
1522 | bol = gs->buf; |
1523 | left = gs->size; | |
83b5d2f5 JH |
1524 | while (left) { |
1525 | char *eol, ch; | |
0ab7befa | 1526 | int hit; |
83b5d2f5 | 1527 | |
a26345b6 | 1528 | /* |
8997da38 | 1529 | * look_ahead() skips quickly to the line that possibly |
a26345b6 JH |
1530 | * has the next hit; don't call it if we need to do |
1531 | * something more than just skipping the current line | |
1532 | * in response to an unmatch for the current line. E.g. | |
1533 | * inside a post-context window, we will show the current | |
1534 | * line as a context around the previous hit when it | |
1535 | * doesn't hit. | |
1536 | */ | |
1537 | if (try_lookahead | |
1538 | && !(last_hit | |
ba8ea749 RS |
1539 | && (show_function || |
1540 | lno <= last_hit + opt->post_context)) | |
a26345b6 JH |
1541 | && look_ahead(opt, &left, &lno, &bol)) |
1542 | break; | |
83b5d2f5 JH |
1543 | eol = end_of_line(bol, &left); |
1544 | ch = *eol; | |
1545 | *eol = 0; | |
1546 | ||
480c1ca6 JH |
1547 | if ((ctx == GREP_CONTEXT_HEAD) && (eol == bol)) |
1548 | ctx = GREP_CONTEXT_BODY; | |
1549 | ||
0ab7befa | 1550 | hit = match_line(opt, bol, eol, ctx, collect_hits); |
83b5d2f5 JH |
1551 | *eol = ch; |
1552 | ||
0ab7befa JH |
1553 | if (collect_hits) |
1554 | goto next_line; | |
1555 | ||
83b5d2f5 JH |
1556 | /* "grep -v -e foo -e bla" should list lines |
1557 | * that do not have either, so inversion should | |
1558 | * be done outside. | |
1559 | */ | |
1560 | if (opt->invert) | |
1561 | hit = !hit; | |
1562 | if (opt->unmatch_name_only) { | |
1563 | if (hit) | |
1564 | return 0; | |
1565 | goto next_line; | |
1566 | } | |
1567 | if (hit) { | |
1568 | count++; | |
1569 | if (opt->status_only) | |
1570 | return 1; | |
321ffcc0 | 1571 | if (opt->name_only) { |
e1327023 | 1572 | show_name(opt, gs->name); |
321ffcc0 RS |
1573 | return 1; |
1574 | } | |
c30c10cf RS |
1575 | if (opt->count) |
1576 | goto next_line; | |
83b5d2f5 | 1577 | if (binary_match_only) { |
5b594f45 | 1578 | opt->output(opt, "Binary file ", 12); |
e1327023 | 1579 | output_color(opt, gs->name, strlen(gs->name), |
55f638bd | 1580 | opt->color_filename); |
5b594f45 | 1581 | opt->output(opt, " matches\n", 9); |
83b5d2f5 JH |
1582 | return 1; |
1583 | } | |
83b5d2f5 JH |
1584 | /* Hit at this line. If we haven't shown the |
1585 | * pre-context lines, we would need to show them. | |
83b5d2f5 | 1586 | */ |
ba8ea749 | 1587 | if (opt->pre_context || opt->funcbody) |
e1327023 | 1588 | show_pre_context(opt, gs, bol, eol, lno); |
2944e4e6 | 1589 | else if (opt->funcname) |
e1327023 JK |
1590 | show_funcname_line(opt, gs, bol, lno); |
1591 | show_line(opt, bol, eol, gs->name, lno, ':'); | |
5dd06d38 | 1592 | last_hit = lno; |
ba8ea749 RS |
1593 | if (opt->funcbody) |
1594 | show_function = 1; | |
1595 | goto next_line; | |
83b5d2f5 | 1596 | } |
e1327023 | 1597 | if (show_function && match_funcname(opt, gs, bol, eol)) |
ba8ea749 RS |
1598 | show_function = 0; |
1599 | if (show_function || | |
1600 | (last_hit && lno <= last_hit + opt->post_context)) { | |
83b5d2f5 JH |
1601 | /* If the last hit is within the post context, |
1602 | * we need to show this line. | |
1603 | */ | |
e1327023 | 1604 | show_line(opt, bol, eol, gs->name, lno, '-'); |
83b5d2f5 | 1605 | } |
83b5d2f5 JH |
1606 | |
1607 | next_line: | |
1608 | bol = eol + 1; | |
1609 | if (!left) | |
1610 | break; | |
1611 | left--; | |
1612 | lno++; | |
1613 | } | |
1614 | ||
0ab7befa JH |
1615 | if (collect_hits) |
1616 | return 0; | |
b48fb5b6 | 1617 | |
83b5d2f5 JH |
1618 | if (opt->status_only) |
1619 | return 0; | |
1620 | if (opt->unmatch_name_only) { | |
1621 | /* We did not see any hit, so we want to show this */ | |
e1327023 | 1622 | show_name(opt, gs->name); |
83b5d2f5 JH |
1623 | return 1; |
1624 | } | |
1625 | ||
60ecac98 RS |
1626 | xdiff_clear_find_func(&xecfg); |
1627 | opt->priv = NULL; | |
1628 | ||
83b5d2f5 JH |
1629 | /* NEEDSWORK: |
1630 | * The real "grep -c foo *.c" gives many "bar.c:0" lines, | |
1631 | * which feels mostly useless but sometimes useful. Maybe | |
1632 | * make it another option? For now suppress them. | |
1633 | */ | |
5b594f45 FK |
1634 | if (opt->count && count) { |
1635 | char buf[32]; | |
f76d947a RS |
1636 | if (opt->pathname) { |
1637 | output_color(opt, gs->name, strlen(gs->name), | |
1638 | opt->color_filename); | |
1639 | output_sep(opt, ':'); | |
1640 | } | |
55f638bd | 1641 | snprintf(buf, sizeof(buf), "%u\n", count); |
5b594f45 | 1642 | opt->output(opt, buf, strlen(buf)); |
c30c10cf | 1643 | return 1; |
5b594f45 | 1644 | } |
83b5d2f5 JH |
1645 | return !!last_hit; |
1646 | } | |
1647 | ||
0ab7befa JH |
1648 | static void clr_hit_marker(struct grep_expr *x) |
1649 | { | |
1650 | /* All-hit markers are meaningful only at the very top level | |
1651 | * OR node. | |
1652 | */ | |
1653 | while (1) { | |
1654 | x->hit = 0; | |
1655 | if (x->node != GREP_NODE_OR) | |
1656 | return; | |
1657 | x->u.binary.left->hit = 0; | |
1658 | x = x->u.binary.right; | |
1659 | } | |
1660 | } | |
1661 | ||
1662 | static int chk_hit_marker(struct grep_expr *x) | |
1663 | { | |
1664 | /* Top level nodes have hit markers. See if they all are hits */ | |
1665 | while (1) { | |
1666 | if (x->node != GREP_NODE_OR) | |
1667 | return x->hit; | |
1668 | if (!x->u.binary.left->hit) | |
1669 | return 0; | |
1670 | x = x->u.binary.right; | |
1671 | } | |
1672 | } | |
1673 | ||
e1327023 | 1674 | int grep_source(struct grep_opt *opt, struct grep_source *gs) |
0ab7befa JH |
1675 | { |
1676 | /* | |
1677 | * we do not have to do the two-pass grep when we do not check | |
1678 | * buffer-wide "all-match". | |
1679 | */ | |
1680 | if (!opt->all_match) | |
e1327023 | 1681 | return grep_source_1(opt, gs, 0); |
0ab7befa JH |
1682 | |
1683 | /* Otherwise the toplevel "or" terms hit a bit differently. | |
1684 | * We first clear hit markers from them. | |
1685 | */ | |
1686 | clr_hit_marker(opt->pattern_expression); | |
e1327023 | 1687 | grep_source_1(opt, gs, 1); |
0ab7befa JH |
1688 | |
1689 | if (!chk_hit_marker(opt->pattern_expression)) | |
1690 | return 0; | |
1691 | ||
e1327023 JK |
1692 | return grep_source_1(opt, gs, 0); |
1693 | } | |
1694 | ||
c876d6da | 1695 | int grep_buffer(struct grep_opt *opt, char *buf, unsigned long size) |
e1327023 JK |
1696 | { |
1697 | struct grep_source gs; | |
1698 | int r; | |
1699 | ||
55c61688 | 1700 | grep_source_init(&gs, GREP_SOURCE_BUF, NULL, NULL, NULL); |
e1327023 JK |
1701 | gs.buf = buf; |
1702 | gs.size = size; | |
1703 | ||
1704 | r = grep_source(opt, &gs); | |
1705 | ||
1706 | grep_source_clear(&gs); | |
1707 | return r; | |
1708 | } | |
1709 | ||
1710 | void grep_source_init(struct grep_source *gs, enum grep_source_type type, | |
55c61688 NTND |
1711 | const char *name, const char *path, |
1712 | const void *identifier) | |
e1327023 JK |
1713 | { |
1714 | gs->type = type; | |
8c53f071 JK |
1715 | gs->name = xstrdup_or_null(name); |
1716 | gs->path = xstrdup_or_null(path); | |
e1327023 JK |
1717 | gs->buf = NULL; |
1718 | gs->size = 0; | |
94ad9d9e | 1719 | gs->driver = NULL; |
e1327023 JK |
1720 | |
1721 | switch (type) { | |
1722 | case GREP_SOURCE_FILE: | |
1723 | gs->identifier = xstrdup(identifier); | |
1724 | break; | |
1725 | case GREP_SOURCE_SHA1: | |
1726 | gs->identifier = xmalloc(20); | |
50546b15 | 1727 | hashcpy(gs->identifier, identifier); |
e1327023 JK |
1728 | break; |
1729 | case GREP_SOURCE_BUF: | |
1730 | gs->identifier = NULL; | |
1731 | } | |
1732 | } | |
1733 | ||
1734 | void grep_source_clear(struct grep_source *gs) | |
1735 | { | |
1736 | free(gs->name); | |
1737 | gs->name = NULL; | |
55c61688 NTND |
1738 | free(gs->path); |
1739 | gs->path = NULL; | |
e1327023 JK |
1740 | free(gs->identifier); |
1741 | gs->identifier = NULL; | |
1742 | grep_source_clear_data(gs); | |
1743 | } | |
1744 | ||
1745 | void grep_source_clear_data(struct grep_source *gs) | |
1746 | { | |
1747 | switch (gs->type) { | |
1748 | case GREP_SOURCE_FILE: | |
1749 | case GREP_SOURCE_SHA1: | |
1750 | free(gs->buf); | |
1751 | gs->buf = NULL; | |
1752 | gs->size = 0; | |
1753 | break; | |
1754 | case GREP_SOURCE_BUF: | |
1755 | /* leave user-provided buf intact */ | |
1756 | break; | |
1757 | } | |
1758 | } | |
1759 | ||
1760 | static int grep_source_load_sha1(struct grep_source *gs) | |
1761 | { | |
1762 | enum object_type type; | |
1763 | ||
1764 | grep_read_lock(); | |
1765 | gs->buf = read_sha1_file(gs->identifier, &type, &gs->size); | |
1766 | grep_read_unlock(); | |
1767 | ||
1768 | if (!gs->buf) | |
1769 | return error(_("'%s': unable to read %s"), | |
1770 | gs->name, | |
1771 | sha1_to_hex(gs->identifier)); | |
1772 | return 0; | |
1773 | } | |
1774 | ||
1775 | static int grep_source_load_file(struct grep_source *gs) | |
1776 | { | |
1777 | const char *filename = gs->identifier; | |
1778 | struct stat st; | |
1779 | char *data; | |
1780 | size_t size; | |
1781 | int i; | |
1782 | ||
1783 | if (lstat(filename, &st) < 0) { | |
1784 | err_ret: | |
1785 | if (errno != ENOENT) | |
1786 | error(_("'%s': %s"), filename, strerror(errno)); | |
1787 | return -1; | |
1788 | } | |
1789 | if (!S_ISREG(st.st_mode)) | |
1790 | return -1; | |
1791 | size = xsize_t(st.st_size); | |
1792 | i = open(filename, O_RDONLY); | |
1793 | if (i < 0) | |
1794 | goto err_ret; | |
1795 | data = xmalloc(size + 1); | |
1796 | if (st.st_size != read_in_full(i, data, size)) { | |
1797 | error(_("'%s': short read %s"), filename, strerror(errno)); | |
1798 | close(i); | |
1799 | free(data); | |
1800 | return -1; | |
1801 | } | |
1802 | close(i); | |
1803 | data[size] = 0; | |
1804 | ||
1805 | gs->buf = data; | |
1806 | gs->size = size; | |
1807 | return 0; | |
1808 | } | |
1809 | ||
3083301e | 1810 | static int grep_source_load(struct grep_source *gs) |
e1327023 JK |
1811 | { |
1812 | if (gs->buf) | |
1813 | return 0; | |
1814 | ||
1815 | switch (gs->type) { | |
1816 | case GREP_SOURCE_FILE: | |
1817 | return grep_source_load_file(gs); | |
1818 | case GREP_SOURCE_SHA1: | |
1819 | return grep_source_load_sha1(gs); | |
1820 | case GREP_SOURCE_BUF: | |
1821 | return gs->buf ? 0 : -1; | |
1822 | } | |
1823 | die("BUG: invalid grep_source type"); | |
0ab7befa | 1824 | } |
94ad9d9e JK |
1825 | |
1826 | void grep_source_load_driver(struct grep_source *gs) | |
1827 | { | |
1828 | if (gs->driver) | |
1829 | return; | |
1830 | ||
1831 | grep_attr_lock(); | |
55c61688 NTND |
1832 | if (gs->path) |
1833 | gs->driver = userdiff_find_by_path(gs->path); | |
94ad9d9e JK |
1834 | if (!gs->driver) |
1835 | gs->driver = userdiff_find_by_name("default"); | |
1836 | grep_attr_unlock(); | |
1837 | } | |
41b59bfc | 1838 | |
3083301e | 1839 | static int grep_source_is_binary(struct grep_source *gs) |
41b59bfc JK |
1840 | { |
1841 | grep_source_load_driver(gs); | |
1842 | if (gs->driver->binary != -1) | |
1843 | return gs->driver->binary; | |
1844 | ||
1845 | if (!grep_source_load(gs)) | |
1846 | return buffer_is_binary(gs->buf, gs->size); | |
1847 | ||
1848 | return 0; | |
1849 | } |