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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" | |
83b5d2f5 | 7 | |
07a7d656 JH |
8 | static int grep_source_load(struct grep_source *gs); |
9 | static int grep_source_is_binary(struct grep_source *gs); | |
10 | ||
7687a054 JH |
11 | static struct grep_opt grep_defaults; |
12 | ||
13 | /* | |
14 | * Initialize the grep_defaults template with hardcoded defaults. | |
15 | * We could let the compiler do this, but without C99 initializers | |
16 | * the code gets unwieldy and unreadable, so... | |
17 | */ | |
18 | void init_grep_defaults(void) | |
19 | { | |
20 | struct grep_opt *opt = &grep_defaults; | |
918d4e1c JH |
21 | static int run_once; |
22 | ||
23 | if (run_once) | |
24 | return; | |
25 | run_once++; | |
7687a054 JH |
26 | |
27 | memset(opt, 0, sizeof(*opt)); | |
28 | opt->relative = 1; | |
29 | opt->pathname = 1; | |
30 | opt->regflags = REG_NEWLINE; | |
31 | opt->max_depth = -1; | |
32 | opt->pattern_type_option = GREP_PATTERN_TYPE_UNSPECIFIED; | |
33 | opt->extended_regexp_option = 0; | |
7ce4fb94 JK |
34 | color_set(opt->color_context, ""); |
35 | color_set(opt->color_filename, ""); | |
36 | color_set(opt->color_function, ""); | |
37 | color_set(opt->color_lineno, ""); | |
38 | color_set(opt->color_match_context, GIT_COLOR_BOLD_RED); | |
39 | color_set(opt->color_match_selected, GIT_COLOR_BOLD_RED); | |
40 | color_set(opt->color_selected, ""); | |
41 | color_set(opt->color_sep, GIT_COLOR_CYAN); | |
7687a054 JH |
42 | opt->color = -1; |
43 | } | |
44 | ||
45 | static int parse_pattern_type_arg(const char *opt, const char *arg) | |
46 | { | |
47 | if (!strcmp(arg, "default")) | |
48 | return GREP_PATTERN_TYPE_UNSPECIFIED; | |
49 | else if (!strcmp(arg, "basic")) | |
50 | return GREP_PATTERN_TYPE_BRE; | |
51 | else if (!strcmp(arg, "extended")) | |
52 | return GREP_PATTERN_TYPE_ERE; | |
53 | else if (!strcmp(arg, "fixed")) | |
54 | return GREP_PATTERN_TYPE_FIXED; | |
55 | else if (!strcmp(arg, "perl")) | |
56 | return GREP_PATTERN_TYPE_PCRE; | |
57 | die("bad %s argument: %s", opt, arg); | |
58 | } | |
59 | ||
60 | /* | |
61 | * Read the configuration file once and store it in | |
62 | * the grep_defaults template. | |
63 | */ | |
64 | int grep_config(const char *var, const char *value, void *cb) | |
65 | { | |
66 | struct grep_opt *opt = &grep_defaults; | |
67 | char *color = NULL; | |
68 | ||
69 | if (userdiff_config(var, value) < 0) | |
70 | return -1; | |
71 | ||
72 | if (!strcmp(var, "grep.extendedregexp")) { | |
73 | if (git_config_bool(var, value)) | |
74 | opt->extended_regexp_option = 1; | |
75 | else | |
76 | opt->extended_regexp_option = 0; | |
77 | return 0; | |
78 | } | |
79 | ||
80 | if (!strcmp(var, "grep.patterntype")) { | |
81 | opt->pattern_type_option = parse_pattern_type_arg(var, value); | |
82 | return 0; | |
83 | } | |
84 | ||
85 | if (!strcmp(var, "grep.linenumber")) { | |
86 | opt->linenum = git_config_bool(var, value); | |
87 | return 0; | |
88 | } | |
89 | ||
6453f7b3 AS |
90 | if (!strcmp(var, "grep.fullname")) { |
91 | opt->relative = !git_config_bool(var, value); | |
92 | return 0; | |
93 | } | |
94 | ||
7687a054 JH |
95 | if (!strcmp(var, "color.grep")) |
96 | opt->color = git_config_colorbool(var, value); | |
97 | else if (!strcmp(var, "color.grep.context")) | |
98 | color = opt->color_context; | |
99 | else if (!strcmp(var, "color.grep.filename")) | |
100 | color = opt->color_filename; | |
101 | else if (!strcmp(var, "color.grep.function")) | |
102 | color = opt->color_function; | |
103 | else if (!strcmp(var, "color.grep.linenumber")) | |
104 | color = opt->color_lineno; | |
79a77109 RS |
105 | else if (!strcmp(var, "color.grep.matchcontext")) |
106 | color = opt->color_match_context; | |
107 | else if (!strcmp(var, "color.grep.matchselected")) | |
108 | color = opt->color_match_selected; | |
7687a054 JH |
109 | else if (!strcmp(var, "color.grep.selected")) |
110 | color = opt->color_selected; | |
111 | else if (!strcmp(var, "color.grep.separator")) | |
112 | color = opt->color_sep; | |
79a77109 RS |
113 | else if (!strcmp(var, "color.grep.match")) { |
114 | int rc = 0; | |
115 | if (!value) | |
116 | return config_error_nonbool(var); | |
bf1f639e JH |
117 | rc |= color_parse(value, opt->color_match_context); |
118 | rc |= color_parse(value, opt->color_match_selected); | |
79a77109 RS |
119 | return rc; |
120 | } | |
7687a054 JH |
121 | |
122 | if (color) { | |
123 | if (!value) | |
124 | return config_error_nonbool(var); | |
f6c5a296 | 125 | return color_parse(value, color); |
7687a054 JH |
126 | } |
127 | return 0; | |
128 | } | |
129 | ||
130 | /* | |
131 | * Initialize one instance of grep_opt and copy the | |
132 | * default values from the template we read the configuration | |
133 | * information in an earlier call to git_config(grep_config). | |
134 | */ | |
135 | void grep_init(struct grep_opt *opt, const char *prefix) | |
136 | { | |
137 | struct grep_opt *def = &grep_defaults; | |
138 | ||
139 | memset(opt, 0, sizeof(*opt)); | |
140 | opt->prefix = prefix; | |
141 | opt->prefix_length = (prefix && *prefix) ? strlen(prefix) : 0; | |
142 | opt->pattern_tail = &opt->pattern_list; | |
143 | opt->header_tail = &opt->header_list; | |
144 | ||
145 | opt->color = def->color; | |
146 | opt->extended_regexp_option = def->extended_regexp_option; | |
147 | opt->pattern_type_option = def->pattern_type_option; | |
148 | opt->linenum = def->linenum; | |
149 | opt->max_depth = def->max_depth; | |
150 | opt->pathname = def->pathname; | |
151 | opt->regflags = def->regflags; | |
152 | opt->relative = def->relative; | |
153 | ||
7ce4fb94 JK |
154 | color_set(opt->color_context, def->color_context); |
155 | color_set(opt->color_filename, def->color_filename); | |
156 | color_set(opt->color_function, def->color_function); | |
157 | color_set(opt->color_lineno, def->color_lineno); | |
158 | color_set(opt->color_match_context, def->color_match_context); | |
159 | color_set(opt->color_match_selected, def->color_match_selected); | |
160 | color_set(opt->color_selected, def->color_selected); | |
161 | color_set(opt->color_sep, def->color_sep); | |
7687a054 | 162 | } |
07a7d656 | 163 | |
c5c31d33 JH |
164 | void grep_commit_pattern_type(enum grep_pattern_type pattern_type, struct grep_opt *opt) |
165 | { | |
166 | if (pattern_type != GREP_PATTERN_TYPE_UNSPECIFIED) | |
167 | grep_set_pattern_type_option(pattern_type, opt); | |
168 | else if (opt->pattern_type_option != GREP_PATTERN_TYPE_UNSPECIFIED) | |
169 | grep_set_pattern_type_option(opt->pattern_type_option, opt); | |
170 | else if (opt->extended_regexp_option) | |
171 | grep_set_pattern_type_option(GREP_PATTERN_TYPE_ERE, opt); | |
172 | } | |
173 | ||
174 | void grep_set_pattern_type_option(enum grep_pattern_type pattern_type, struct grep_opt *opt) | |
175 | { | |
176 | switch (pattern_type) { | |
177 | case GREP_PATTERN_TYPE_UNSPECIFIED: | |
178 | /* fall through */ | |
179 | ||
180 | case GREP_PATTERN_TYPE_BRE: | |
181 | opt->fixed = 0; | |
182 | opt->pcre = 0; | |
183 | opt->regflags &= ~REG_EXTENDED; | |
184 | break; | |
185 | ||
186 | case GREP_PATTERN_TYPE_ERE: | |
187 | opt->fixed = 0; | |
188 | opt->pcre = 0; | |
189 | opt->regflags |= REG_EXTENDED; | |
190 | break; | |
191 | ||
192 | case GREP_PATTERN_TYPE_FIXED: | |
193 | opt->fixed = 1; | |
194 | opt->pcre = 0; | |
195 | opt->regflags &= ~REG_EXTENDED; | |
196 | break; | |
197 | ||
198 | case GREP_PATTERN_TYPE_PCRE: | |
199 | opt->fixed = 0; | |
200 | opt->pcre = 1; | |
201 | opt->regflags &= ~REG_EXTENDED; | |
202 | break; | |
203 | } | |
204 | } | |
205 | ||
fc456751 RS |
206 | static struct grep_pat *create_grep_pat(const char *pat, size_t patlen, |
207 | const char *origin, int no, | |
208 | enum grep_pat_token t, | |
209 | enum grep_header_field field) | |
a4d7d2c6 JH |
210 | { |
211 | struct grep_pat *p = xcalloc(1, sizeof(*p)); | |
526a858a | 212 | p->pattern = xmemdupz(pat, patlen); |
fc456751 RS |
213 | p->patternlen = patlen; |
214 | p->origin = origin; | |
215 | p->no = no; | |
216 | p->token = t; | |
a4d7d2c6 | 217 | p->field = field; |
fc456751 RS |
218 | return p; |
219 | } | |
220 | ||
2b3873ff RS |
221 | static void do_append_grep_pat(struct grep_pat ***tail, struct grep_pat *p) |
222 | { | |
223 | **tail = p; | |
224 | *tail = &p->next; | |
a4d7d2c6 | 225 | p->next = NULL; |
526a858a RS |
226 | |
227 | switch (p->token) { | |
228 | case GREP_PATTERN: /* atom */ | |
229 | case GREP_PATTERN_HEAD: | |
230 | case GREP_PATTERN_BODY: | |
231 | for (;;) { | |
232 | struct grep_pat *new_pat; | |
233 | size_t len = 0; | |
234 | char *cp = p->pattern + p->patternlen, *nl = NULL; | |
235 | while (++len <= p->patternlen) { | |
236 | if (*(--cp) == '\n') { | |
237 | nl = cp; | |
238 | break; | |
239 | } | |
240 | } | |
241 | if (!nl) | |
242 | break; | |
243 | new_pat = create_grep_pat(nl + 1, len - 1, p->origin, | |
244 | p->no, p->token, p->field); | |
245 | new_pat->next = p->next; | |
246 | if (!p->next) | |
247 | *tail = &new_pat->next; | |
248 | p->next = new_pat; | |
249 | *nl = '\0'; | |
250 | p->patternlen -= len; | |
251 | } | |
252 | break; | |
253 | default: | |
254 | break; | |
255 | } | |
2b3873ff RS |
256 | } |
257 | ||
fc456751 RS |
258 | void append_header_grep_pattern(struct grep_opt *opt, |
259 | enum grep_header_field field, const char *pat) | |
260 | { | |
261 | struct grep_pat *p = create_grep_pat(pat, strlen(pat), "header", 0, | |
262 | GREP_PATTERN_HEAD, field); | |
baa6378f JH |
263 | if (field == GREP_HEADER_REFLOG) |
264 | opt->use_reflog_filter = 1; | |
2b3873ff | 265 | do_append_grep_pat(&opt->header_tail, p); |
a4d7d2c6 JH |
266 | } |
267 | ||
83b5d2f5 JH |
268 | void append_grep_pattern(struct grep_opt *opt, const char *pat, |
269 | const char *origin, int no, enum grep_pat_token t) | |
ed40a095 RS |
270 | { |
271 | append_grep_pat(opt, pat, strlen(pat), origin, no, t); | |
272 | } | |
273 | ||
274 | void append_grep_pat(struct grep_opt *opt, const char *pat, size_t patlen, | |
275 | const char *origin, int no, enum grep_pat_token t) | |
83b5d2f5 | 276 | { |
fc456751 | 277 | struct grep_pat *p = create_grep_pat(pat, patlen, origin, no, t, 0); |
2b3873ff | 278 | do_append_grep_pat(&opt->pattern_tail, p); |
83b5d2f5 JH |
279 | } |
280 | ||
5b594f45 FK |
281 | struct grep_opt *grep_opt_dup(const struct grep_opt *opt) |
282 | { | |
283 | struct grep_pat *pat; | |
284 | struct grep_opt *ret = xmalloc(sizeof(struct grep_opt)); | |
285 | *ret = *opt; | |
286 | ||
287 | ret->pattern_list = NULL; | |
288 | ret->pattern_tail = &ret->pattern_list; | |
289 | ||
290 | for(pat = opt->pattern_list; pat != NULL; pat = pat->next) | |
291 | { | |
292 | if(pat->token == GREP_PATTERN_HEAD) | |
293 | append_header_grep_pattern(ret, pat->field, | |
294 | pat->pattern); | |
295 | else | |
ed40a095 RS |
296 | append_grep_pat(ret, pat->pattern, pat->patternlen, |
297 | pat->origin, pat->no, pat->token); | |
5b594f45 FK |
298 | } |
299 | ||
300 | return ret; | |
301 | } | |
302 | ||
a30c148a MK |
303 | static NORETURN void compile_regexp_failed(const struct grep_pat *p, |
304 | const char *error) | |
305 | { | |
306 | char where[1024]; | |
307 | ||
308 | if (p->no) | |
19bdd3e7 | 309 | xsnprintf(where, sizeof(where), "In '%s' at %d, ", p->origin, p->no); |
a30c148a | 310 | else if (p->origin) |
19bdd3e7 | 311 | xsnprintf(where, sizeof(where), "%s, ", p->origin); |
a30c148a MK |
312 | else |
313 | where[0] = 0; | |
314 | ||
315 | die("%s'%s': %s", where, p->pattern, error); | |
316 | } | |
317 | ||
63e7e9d8 MK |
318 | #ifdef USE_LIBPCRE |
319 | static void compile_pcre_regexp(struct grep_pat *p, const struct grep_opt *opt) | |
320 | { | |
321 | const char *error; | |
322 | int erroffset; | |
fba4f125 | 323 | int options = PCRE_MULTILINE; |
63e7e9d8 MK |
324 | |
325 | if (opt->ignore_case) | |
326 | options |= PCRE_CASELESS; | |
327 | ||
328 | p->pcre_regexp = pcre_compile(p->pattern, options, &error, &erroffset, | |
329 | NULL); | |
330 | if (!p->pcre_regexp) | |
331 | compile_regexp_failed(p, error); | |
332 | ||
333 | p->pcre_extra_info = pcre_study(p->pcre_regexp, 0, &error); | |
334 | if (!p->pcre_extra_info && error) | |
335 | die("%s", error); | |
336 | } | |
337 | ||
338 | static int pcrematch(struct grep_pat *p, const char *line, const char *eol, | |
339 | regmatch_t *match, int eflags) | |
340 | { | |
341 | int ovector[30], ret, flags = 0; | |
342 | ||
343 | if (eflags & REG_NOTBOL) | |
344 | flags |= PCRE_NOTBOL; | |
345 | ||
346 | ret = pcre_exec(p->pcre_regexp, p->pcre_extra_info, line, eol - line, | |
347 | 0, flags, ovector, ARRAY_SIZE(ovector)); | |
348 | if (ret < 0 && ret != PCRE_ERROR_NOMATCH) | |
349 | die("pcre_exec failed with error code %d", ret); | |
350 | if (ret > 0) { | |
351 | ret = 0; | |
352 | match->rm_so = ovector[0]; | |
353 | match->rm_eo = ovector[1]; | |
354 | } | |
355 | ||
356 | return ret; | |
357 | } | |
358 | ||
359 | static void free_pcre_regexp(struct grep_pat *p) | |
360 | { | |
361 | pcre_free(p->pcre_regexp); | |
362 | pcre_free(p->pcre_extra_info); | |
363 | } | |
364 | #else /* !USE_LIBPCRE */ | |
365 | static void compile_pcre_regexp(struct grep_pat *p, const struct grep_opt *opt) | |
366 | { | |
367 | die("cannot use Perl-compatible regexes when not compiled with USE_LIBPCRE"); | |
368 | } | |
369 | ||
370 | static int pcrematch(struct grep_pat *p, const char *line, const char *eol, | |
371 | regmatch_t *match, int eflags) | |
372 | { | |
373 | return 1; | |
374 | } | |
375 | ||
376 | static void free_pcre_regexp(struct grep_pat *p) | |
377 | { | |
378 | } | |
379 | #endif /* !USE_LIBPCRE */ | |
380 | ||
9eceddee FK |
381 | static int is_fixed(const char *s, size_t len) |
382 | { | |
383 | size_t i; | |
384 | ||
385 | /* regcomp cannot accept patterns with NULs so we | |
386 | * consider any pattern containing a NUL fixed. | |
387 | */ | |
388 | if (memchr(s, 0, len)) | |
389 | return 1; | |
390 | ||
391 | for (i = 0; i < len; i++) { | |
392 | if (is_regex_special(s[i])) | |
393 | return 0; | |
394 | } | |
395 | ||
396 | return 1; | |
397 | } | |
398 | ||
83b5d2f5 JH |
399 | static void compile_regexp(struct grep_pat *p, struct grep_opt *opt) |
400 | { | |
c822255c RS |
401 | int err; |
402 | ||
d7eb527d | 403 | p->word_regexp = opt->word_regexp; |
5183bf67 | 404 | p->ignore_case = opt->ignore_case; |
d7eb527d | 405 | |
60452a30 NTND |
406 | if (opt->fixed) |
407 | p->fixed = 1; | |
408 | else if (is_fixed(p->pattern, p->patternlen)) | |
9eceddee FK |
409 | p->fixed = 1; |
410 | else | |
411 | p->fixed = 0; | |
412 | ||
413 | if (p->fixed) { | |
0f871cf5 JH |
414 | if (opt->regflags & REG_ICASE || p->ignore_case) |
415 | p->kws = kwsalloc(tolower_trans_tbl); | |
416 | else | |
9eceddee | 417 | p->kws = kwsalloc(NULL); |
9eceddee FK |
418 | kwsincr(p->kws, p->pattern, p->patternlen); |
419 | kwsprep(p->kws); | |
c822255c | 420 | return; |
9eceddee | 421 | } |
c822255c | 422 | |
63e7e9d8 MK |
423 | if (opt->pcre) { |
424 | compile_pcre_regexp(p, opt); | |
425 | return; | |
426 | } | |
427 | ||
c822255c | 428 | err = regcomp(&p->regexp, p->pattern, opt->regflags); |
83b5d2f5 JH |
429 | if (err) { |
430 | char errbuf[1024]; | |
83b5d2f5 JH |
431 | regerror(err, &p->regexp, errbuf, 1024); |
432 | regfree(&p->regexp); | |
a30c148a | 433 | compile_regexp_failed(p, errbuf); |
83b5d2f5 JH |
434 | } |
435 | } | |
436 | ||
0ab7befa | 437 | static struct grep_expr *compile_pattern_or(struct grep_pat **); |
83b5d2f5 JH |
438 | static struct grep_expr *compile_pattern_atom(struct grep_pat **list) |
439 | { | |
440 | struct grep_pat *p; | |
441 | struct grep_expr *x; | |
442 | ||
443 | p = *list; | |
c922b01f LT |
444 | if (!p) |
445 | return NULL; | |
83b5d2f5 JH |
446 | switch (p->token) { |
447 | case GREP_PATTERN: /* atom */ | |
480c1ca6 JH |
448 | case GREP_PATTERN_HEAD: |
449 | case GREP_PATTERN_BODY: | |
83b5d2f5 JH |
450 | x = xcalloc(1, sizeof (struct grep_expr)); |
451 | x->node = GREP_NODE_ATOM; | |
452 | x->u.atom = p; | |
453 | *list = p->next; | |
454 | return x; | |
455 | case GREP_OPEN_PAREN: | |
456 | *list = p->next; | |
0ab7befa | 457 | x = compile_pattern_or(list); |
83b5d2f5 JH |
458 | if (!*list || (*list)->token != GREP_CLOSE_PAREN) |
459 | die("unmatched parenthesis"); | |
460 | *list = (*list)->next; | |
461 | return x; | |
462 | default: | |
463 | return NULL; | |
464 | } | |
465 | } | |
466 | ||
467 | static struct grep_expr *compile_pattern_not(struct grep_pat **list) | |
468 | { | |
469 | struct grep_pat *p; | |
470 | struct grep_expr *x; | |
471 | ||
472 | p = *list; | |
c922b01f LT |
473 | if (!p) |
474 | return NULL; | |
83b5d2f5 JH |
475 | switch (p->token) { |
476 | case GREP_NOT: | |
477 | if (!p->next) | |
478 | die("--not not followed by pattern expression"); | |
479 | *list = p->next; | |
480 | x = xcalloc(1, sizeof (struct grep_expr)); | |
481 | x->node = GREP_NODE_NOT; | |
482 | x->u.unary = compile_pattern_not(list); | |
483 | if (!x->u.unary) | |
484 | die("--not followed by non pattern expression"); | |
485 | return x; | |
486 | default: | |
487 | return compile_pattern_atom(list); | |
488 | } | |
489 | } | |
490 | ||
491 | static struct grep_expr *compile_pattern_and(struct grep_pat **list) | |
492 | { | |
493 | struct grep_pat *p; | |
494 | struct grep_expr *x, *y, *z; | |
495 | ||
496 | x = compile_pattern_not(list); | |
497 | p = *list; | |
498 | if (p && p->token == GREP_AND) { | |
499 | if (!p->next) | |
500 | die("--and not followed by pattern expression"); | |
501 | *list = p->next; | |
502 | y = compile_pattern_and(list); | |
503 | if (!y) | |
504 | die("--and not followed by pattern expression"); | |
505 | z = xcalloc(1, sizeof (struct grep_expr)); | |
506 | z->node = GREP_NODE_AND; | |
507 | z->u.binary.left = x; | |
508 | z->u.binary.right = y; | |
509 | return z; | |
510 | } | |
511 | return x; | |
512 | } | |
513 | ||
514 | static struct grep_expr *compile_pattern_or(struct grep_pat **list) | |
515 | { | |
516 | struct grep_pat *p; | |
517 | struct grep_expr *x, *y, *z; | |
518 | ||
519 | x = compile_pattern_and(list); | |
520 | p = *list; | |
521 | if (x && p && p->token != GREP_CLOSE_PAREN) { | |
522 | y = compile_pattern_or(list); | |
523 | if (!y) | |
524 | die("not a pattern expression %s", p->pattern); | |
525 | z = xcalloc(1, sizeof (struct grep_expr)); | |
526 | z->node = GREP_NODE_OR; | |
527 | z->u.binary.left = x; | |
528 | z->u.binary.right = y; | |
529 | return z; | |
530 | } | |
531 | return x; | |
532 | } | |
533 | ||
534 | static struct grep_expr *compile_pattern_expr(struct grep_pat **list) | |
535 | { | |
536 | return compile_pattern_or(list); | |
537 | } | |
538 | ||
17bf35a3 JH |
539 | static void indent(int in) |
540 | { | |
541 | while (in-- > 0) | |
542 | fputc(' ', stderr); | |
543 | } | |
544 | ||
545 | static void dump_grep_pat(struct grep_pat *p) | |
546 | { | |
547 | switch (p->token) { | |
548 | case GREP_AND: fprintf(stderr, "*and*"); break; | |
549 | case GREP_OPEN_PAREN: fprintf(stderr, "*(*"); break; | |
550 | case GREP_CLOSE_PAREN: fprintf(stderr, "*)*"); break; | |
551 | case GREP_NOT: fprintf(stderr, "*not*"); break; | |
552 | case GREP_OR: fprintf(stderr, "*or*"); break; | |
553 | ||
554 | case GREP_PATTERN: fprintf(stderr, "pattern"); break; | |
555 | case GREP_PATTERN_HEAD: fprintf(stderr, "pattern_head"); break; | |
556 | case GREP_PATTERN_BODY: fprintf(stderr, "pattern_body"); break; | |
557 | } | |
558 | ||
559 | switch (p->token) { | |
560 | default: break; | |
561 | case GREP_PATTERN_HEAD: | |
562 | fprintf(stderr, "<head %d>", p->field); break; | |
563 | case GREP_PATTERN_BODY: | |
564 | fprintf(stderr, "<body>"); break; | |
565 | } | |
566 | switch (p->token) { | |
567 | default: break; | |
568 | case GREP_PATTERN_HEAD: | |
569 | case GREP_PATTERN_BODY: | |
570 | case GREP_PATTERN: | |
571 | fprintf(stderr, "%.*s", (int)p->patternlen, p->pattern); | |
572 | break; | |
573 | } | |
574 | fputc('\n', stderr); | |
575 | } | |
576 | ||
577 | static void dump_grep_expression_1(struct grep_expr *x, int in) | |
578 | { | |
579 | indent(in); | |
580 | switch (x->node) { | |
581 | case GREP_NODE_TRUE: | |
582 | fprintf(stderr, "true\n"); | |
583 | break; | |
584 | case GREP_NODE_ATOM: | |
585 | dump_grep_pat(x->u.atom); | |
586 | break; | |
587 | case GREP_NODE_NOT: | |
588 | fprintf(stderr, "(not\n"); | |
589 | dump_grep_expression_1(x->u.unary, in+1); | |
590 | indent(in); | |
591 | fprintf(stderr, ")\n"); | |
592 | break; | |
593 | case GREP_NODE_AND: | |
594 | fprintf(stderr, "(and\n"); | |
595 | dump_grep_expression_1(x->u.binary.left, in+1); | |
596 | dump_grep_expression_1(x->u.binary.right, in+1); | |
597 | indent(in); | |
598 | fprintf(stderr, ")\n"); | |
599 | break; | |
600 | case GREP_NODE_OR: | |
601 | fprintf(stderr, "(or\n"); | |
602 | dump_grep_expression_1(x->u.binary.left, in+1); | |
603 | dump_grep_expression_1(x->u.binary.right, in+1); | |
604 | indent(in); | |
605 | fprintf(stderr, ")\n"); | |
606 | break; | |
607 | } | |
608 | } | |
609 | ||
07a7d656 | 610 | static void dump_grep_expression(struct grep_opt *opt) |
17bf35a3 JH |
611 | { |
612 | struct grep_expr *x = opt->pattern_expression; | |
613 | ||
614 | if (opt->all_match) | |
615 | fprintf(stderr, "[all-match]\n"); | |
616 | dump_grep_expression_1(x, 0); | |
617 | fflush(NULL); | |
618 | } | |
619 | ||
5aaeb733 JH |
620 | static struct grep_expr *grep_true_expr(void) |
621 | { | |
622 | struct grep_expr *z = xcalloc(1, sizeof(*z)); | |
623 | z->node = GREP_NODE_TRUE; | |
624 | return z; | |
625 | } | |
626 | ||
627 | static struct grep_expr *grep_or_expr(struct grep_expr *left, struct grep_expr *right) | |
628 | { | |
629 | struct grep_expr *z = xcalloc(1, sizeof(*z)); | |
630 | z->node = GREP_NODE_OR; | |
631 | z->u.binary.left = left; | |
632 | z->u.binary.right = right; | |
633 | return z; | |
634 | } | |
635 | ||
95ce9ce2 | 636 | static struct grep_expr *prep_header_patterns(struct grep_opt *opt) |
83b5d2f5 JH |
637 | { |
638 | struct grep_pat *p; | |
95ce9ce2 | 639 | struct grep_expr *header_expr; |
5aaeb733 JH |
640 | struct grep_expr *(header_group[GREP_HEADER_FIELD_MAX]); |
641 | enum grep_header_field fld; | |
83b5d2f5 | 642 | |
95ce9ce2 JH |
643 | if (!opt->header_list) |
644 | return NULL; | |
2385f246 | 645 | |
95ce9ce2 JH |
646 | for (p = opt->header_list; p; p = p->next) { |
647 | if (p->token != GREP_PATTERN_HEAD) | |
648 | die("bug: a non-header pattern in grep header list."); | |
3ce3ffb8 AP |
649 | if (p->field < GREP_HEADER_FIELD_MIN || |
650 | GREP_HEADER_FIELD_MAX <= p->field) | |
95ce9ce2 JH |
651 | die("bug: unknown header field %d", p->field); |
652 | compile_regexp(p, opt); | |
80235ba7 | 653 | } |
5aaeb733 JH |
654 | |
655 | for (fld = 0; fld < GREP_HEADER_FIELD_MAX; fld++) | |
656 | header_group[fld] = NULL; | |
657 | ||
658 | for (p = opt->header_list; p; p = p->next) { | |
659 | struct grep_expr *h; | |
660 | struct grep_pat *pp = p; | |
661 | ||
662 | h = compile_pattern_atom(&pp); | |
663 | if (!h || pp != p->next) | |
664 | die("bug: malformed header expr"); | |
665 | if (!header_group[p->field]) { | |
666 | header_group[p->field] = h; | |
667 | continue; | |
668 | } | |
669 | header_group[p->field] = grep_or_expr(h, header_group[p->field]); | |
670 | } | |
671 | ||
672 | header_expr = NULL; | |
673 | ||
674 | for (fld = 0; fld < GREP_HEADER_FIELD_MAX; fld++) { | |
675 | if (!header_group[fld]) | |
676 | continue; | |
677 | if (!header_expr) | |
678 | header_expr = grep_true_expr(); | |
679 | header_expr = grep_or_expr(header_group[fld], header_expr); | |
680 | } | |
95ce9ce2 JH |
681 | return header_expr; |
682 | } | |
683 | ||
13e4fc7e JH |
684 | static struct grep_expr *grep_splice_or(struct grep_expr *x, struct grep_expr *y) |
685 | { | |
686 | struct grep_expr *z = x; | |
687 | ||
688 | while (x) { | |
689 | assert(x->node == GREP_NODE_OR); | |
690 | if (x->u.binary.right && | |
691 | x->u.binary.right->node == GREP_NODE_TRUE) { | |
692 | x->u.binary.right = y; | |
693 | break; | |
694 | } | |
695 | x = x->u.binary.right; | |
696 | } | |
697 | return z; | |
698 | } | |
699 | ||
17bf35a3 | 700 | static void compile_grep_patterns_real(struct grep_opt *opt) |
95ce9ce2 JH |
701 | { |
702 | struct grep_pat *p; | |
703 | struct grep_expr *header_expr = prep_header_patterns(opt); | |
0ab7befa | 704 | |
83b5d2f5 | 705 | for (p = opt->pattern_list; p; p = p->next) { |
480c1ca6 JH |
706 | switch (p->token) { |
707 | case GREP_PATTERN: /* atom */ | |
708 | case GREP_PATTERN_HEAD: | |
709 | case GREP_PATTERN_BODY: | |
c822255c | 710 | compile_regexp(p, opt); |
480c1ca6 JH |
711 | break; |
712 | default: | |
83b5d2f5 | 713 | opt->extended = 1; |
480c1ca6 JH |
714 | break; |
715 | } | |
83b5d2f5 JH |
716 | } |
717 | ||
80235ba7 JH |
718 | if (opt->all_match || header_expr) |
719 | opt->extended = 1; | |
17bf35a3 | 720 | else if (!opt->extended && !opt->debug) |
83b5d2f5 JH |
721 | return; |
722 | ||
83b5d2f5 | 723 | p = opt->pattern_list; |
ba150a3f MB |
724 | if (p) |
725 | opt->pattern_expression = compile_pattern_expr(&p); | |
83b5d2f5 JH |
726 | if (p) |
727 | die("incomplete pattern expression: %s", p->pattern); | |
80235ba7 JH |
728 | |
729 | if (!header_expr) | |
730 | return; | |
731 | ||
5aaeb733 | 732 | if (!opt->pattern_expression) |
80235ba7 | 733 | opt->pattern_expression = header_expr; |
13e4fc7e JH |
734 | else if (opt->all_match) |
735 | opt->pattern_expression = grep_splice_or(header_expr, | |
736 | opt->pattern_expression); | |
5aaeb733 JH |
737 | else |
738 | opt->pattern_expression = grep_or_expr(opt->pattern_expression, | |
739 | header_expr); | |
80235ba7 | 740 | opt->all_match = 1; |
83b5d2f5 JH |
741 | } |
742 | ||
17bf35a3 JH |
743 | void compile_grep_patterns(struct grep_opt *opt) |
744 | { | |
745 | compile_grep_patterns_real(opt); | |
746 | if (opt->debug) | |
747 | dump_grep_expression(opt); | |
748 | } | |
749 | ||
b48fb5b6 JH |
750 | static void free_pattern_expr(struct grep_expr *x) |
751 | { | |
752 | switch (x->node) { | |
5aaeb733 | 753 | case GREP_NODE_TRUE: |
b48fb5b6 JH |
754 | case GREP_NODE_ATOM: |
755 | break; | |
756 | case GREP_NODE_NOT: | |
757 | free_pattern_expr(x->u.unary); | |
758 | break; | |
759 | case GREP_NODE_AND: | |
760 | case GREP_NODE_OR: | |
761 | free_pattern_expr(x->u.binary.left); | |
762 | free_pattern_expr(x->u.binary.right); | |
763 | break; | |
764 | } | |
765 | free(x); | |
766 | } | |
767 | ||
768 | void free_grep_patterns(struct grep_opt *opt) | |
769 | { | |
770 | struct grep_pat *p, *n; | |
771 | ||
772 | for (p = opt->pattern_list; p; p = n) { | |
773 | n = p->next; | |
774 | switch (p->token) { | |
775 | case GREP_PATTERN: /* atom */ | |
776 | case GREP_PATTERN_HEAD: | |
777 | case GREP_PATTERN_BODY: | |
9eceddee FK |
778 | if (p->kws) |
779 | kwsfree(p->kws); | |
780 | else if (p->pcre_regexp) | |
63e7e9d8 MK |
781 | free_pcre_regexp(p); |
782 | else | |
783 | regfree(&p->regexp); | |
526a858a | 784 | free(p->pattern); |
b48fb5b6 JH |
785 | break; |
786 | default: | |
787 | break; | |
788 | } | |
789 | free(p); | |
790 | } | |
791 | ||
792 | if (!opt->extended) | |
793 | return; | |
794 | free_pattern_expr(opt->pattern_expression); | |
795 | } | |
796 | ||
83b5d2f5 JH |
797 | static char *end_of_line(char *cp, unsigned long *left) |
798 | { | |
799 | unsigned long l = *left; | |
800 | while (l && *cp != '\n') { | |
801 | l--; | |
802 | cp++; | |
803 | } | |
804 | *left = l; | |
805 | return cp; | |
806 | } | |
807 | ||
808 | static int word_char(char ch) | |
809 | { | |
810 | return isalnum(ch) || ch == '_'; | |
811 | } | |
812 | ||
55f638bd ML |
813 | static void output_color(struct grep_opt *opt, const void *data, size_t size, |
814 | const char *color) | |
815 | { | |
daa0c3d9 | 816 | if (want_color(opt->color) && color && color[0]) { |
55f638bd ML |
817 | opt->output(opt, color, strlen(color)); |
818 | opt->output(opt, data, size); | |
819 | opt->output(opt, GIT_COLOR_RESET, strlen(GIT_COLOR_RESET)); | |
820 | } else | |
821 | opt->output(opt, data, size); | |
822 | } | |
823 | ||
824 | static void output_sep(struct grep_opt *opt, char sign) | |
825 | { | |
826 | if (opt->null_following_name) | |
827 | opt->output(opt, "\0", 1); | |
828 | else | |
829 | output_color(opt, &sign, 1, opt->color_sep); | |
830 | } | |
831 | ||
83caecca RZ |
832 | static void show_name(struct grep_opt *opt, const char *name) |
833 | { | |
55f638bd | 834 | output_color(opt, name, strlen(name), opt->color_filename); |
5b594f45 | 835 | opt->output(opt, opt->null_following_name ? "\0" : "\n", 1); |
83caecca RZ |
836 | } |
837 | ||
ed40a095 RS |
838 | static int fixmatch(struct grep_pat *p, char *line, char *eol, |
839 | regmatch_t *match) | |
83b5d2f5 | 840 | { |
9eceddee FK |
841 | struct kwsmatch kwsm; |
842 | size_t offset = kwsexec(p->kws, line, eol - line, &kwsm); | |
843 | if (offset == -1) { | |
83b5d2f5 JH |
844 | match->rm_so = match->rm_eo = -1; |
845 | return REG_NOMATCH; | |
9eceddee FK |
846 | } else { |
847 | match->rm_so = offset; | |
848 | match->rm_eo = match->rm_so + kwsm.size[0]; | |
83b5d2f5 JH |
849 | return 0; |
850 | } | |
851 | } | |
852 | ||
f96e5673 RS |
853 | static int regmatch(const regex_t *preg, char *line, char *eol, |
854 | regmatch_t *match, int eflags) | |
855 | { | |
856 | #ifdef REG_STARTEND | |
857 | match->rm_so = 0; | |
858 | match->rm_eo = eol - line; | |
859 | eflags |= REG_STARTEND; | |
860 | #endif | |
861 | return regexec(preg, line, 1, match, eflags); | |
862 | } | |
863 | ||
97e77784 MK |
864 | static int patmatch(struct grep_pat *p, char *line, char *eol, |
865 | regmatch_t *match, int eflags) | |
866 | { | |
867 | int hit; | |
868 | ||
869 | if (p->fixed) | |
870 | hit = !fixmatch(p, line, eol, match); | |
63e7e9d8 MK |
871 | else if (p->pcre_regexp) |
872 | hit = !pcrematch(p, line, eol, match, eflags); | |
97e77784 MK |
873 | else |
874 | hit = !regmatch(&p->regexp, line, eol, match, eflags); | |
875 | ||
876 | return hit; | |
877 | } | |
878 | ||
a4d7d2c6 JH |
879 | static int strip_timestamp(char *bol, char **eol_p) |
880 | { | |
881 | char *eol = *eol_p; | |
882 | int ch; | |
883 | ||
884 | while (bol < --eol) { | |
885 | if (*eol != '>') | |
886 | continue; | |
887 | *eol_p = ++eol; | |
888 | ch = *eol; | |
889 | *eol = '\0'; | |
890 | return ch; | |
891 | } | |
892 | return 0; | |
893 | } | |
894 | ||
895 | static struct { | |
896 | const char *field; | |
897 | size_t len; | |
898 | } header_field[] = { | |
899 | { "author ", 7 }, | |
900 | { "committer ", 10 }, | |
72fd13f7 | 901 | { "reflog ", 7 }, |
a4d7d2c6 JH |
902 | }; |
903 | ||
d7eb527d | 904 | static int match_one_pattern(struct grep_pat *p, char *bol, char *eol, |
79212772 RS |
905 | enum grep_context ctx, |
906 | regmatch_t *pmatch, int eflags) | |
83b5d2f5 JH |
907 | { |
908 | int hit = 0; | |
a4d7d2c6 | 909 | int saved_ch = 0; |
e701fadb | 910 | const char *start = bol; |
83b5d2f5 | 911 | |
480c1ca6 JH |
912 | if ((p->token != GREP_PATTERN) && |
913 | ((p->token == GREP_PATTERN_HEAD) != (ctx == GREP_CONTEXT_HEAD))) | |
914 | return 0; | |
915 | ||
a4d7d2c6 JH |
916 | if (p->token == GREP_PATTERN_HEAD) { |
917 | const char *field; | |
918 | size_t len; | |
919 | assert(p->field < ARRAY_SIZE(header_field)); | |
920 | field = header_field[p->field].field; | |
921 | len = header_field[p->field].len; | |
922 | if (strncmp(bol, field, len)) | |
923 | return 0; | |
924 | bol += len; | |
ad4813b3 NTND |
925 | switch (p->field) { |
926 | case GREP_HEADER_AUTHOR: | |
927 | case GREP_HEADER_COMMITTER: | |
928 | saved_ch = strip_timestamp(bol, &eol); | |
929 | break; | |
930 | default: | |
931 | break; | |
932 | } | |
a4d7d2c6 JH |
933 | } |
934 | ||
83b5d2f5 | 935 | again: |
97e77784 | 936 | hit = patmatch(p, bol, eol, pmatch, eflags); |
83b5d2f5 | 937 | |
d7eb527d | 938 | if (hit && p->word_regexp) { |
83b5d2f5 | 939 | if ((pmatch[0].rm_so < 0) || |
84201eae | 940 | (eol - bol) < pmatch[0].rm_so || |
83b5d2f5 JH |
941 | (pmatch[0].rm_eo < 0) || |
942 | (eol - bol) < pmatch[0].rm_eo) | |
943 | die("regexp returned nonsense"); | |
944 | ||
945 | /* Match beginning must be either beginning of the | |
946 | * line, or at word boundary (i.e. the last char must | |
947 | * not be a word char). Similarly, match end must be | |
948 | * either end of the line, or at word boundary | |
949 | * (i.e. the next char must not be a word char). | |
950 | */ | |
fb62eb7f | 951 | if ( ((pmatch[0].rm_so == 0) || |
83b5d2f5 JH |
952 | !word_char(bol[pmatch[0].rm_so-1])) && |
953 | ((pmatch[0].rm_eo == (eol-bol)) || | |
954 | !word_char(bol[pmatch[0].rm_eo])) ) | |
955 | ; | |
956 | else | |
957 | hit = 0; | |
958 | ||
84201eae RS |
959 | /* Words consist of at least one character. */ |
960 | if (pmatch->rm_so == pmatch->rm_eo) | |
961 | hit = 0; | |
962 | ||
83b5d2f5 JH |
963 | if (!hit && pmatch[0].rm_so + bol + 1 < eol) { |
964 | /* There could be more than one match on the | |
965 | * line, and the first match might not be | |
966 | * strict word match. But later ones could be! | |
fb62eb7f RS |
967 | * Forward to the next possible start, i.e. the |
968 | * next position following a non-word char. | |
83b5d2f5 JH |
969 | */ |
970 | bol = pmatch[0].rm_so + bol + 1; | |
fb62eb7f RS |
971 | while (word_char(bol[-1]) && bol < eol) |
972 | bol++; | |
dbb6a4ad | 973 | eflags |= REG_NOTBOL; |
fb62eb7f RS |
974 | if (bol < eol) |
975 | goto again; | |
83b5d2f5 JH |
976 | } |
977 | } | |
a4d7d2c6 JH |
978 | if (p->token == GREP_PATTERN_HEAD && saved_ch) |
979 | *eol = saved_ch; | |
e701fadb RS |
980 | if (hit) { |
981 | pmatch[0].rm_so += bol - start; | |
982 | pmatch[0].rm_eo += bol - start; | |
983 | } | |
83b5d2f5 JH |
984 | return hit; |
985 | } | |
986 | ||
d7eb527d RS |
987 | static int match_expr_eval(struct grep_expr *x, char *bol, char *eol, |
988 | enum grep_context ctx, int collect_hits) | |
83b5d2f5 | 989 | { |
0ab7befa | 990 | int h = 0; |
79212772 | 991 | regmatch_t match; |
0ab7befa | 992 | |
c922b01f LT |
993 | if (!x) |
994 | die("Not a valid grep expression"); | |
83b5d2f5 | 995 | switch (x->node) { |
5aaeb733 JH |
996 | case GREP_NODE_TRUE: |
997 | h = 1; | |
998 | break; | |
83b5d2f5 | 999 | case GREP_NODE_ATOM: |
79212772 | 1000 | h = match_one_pattern(x->u.atom, bol, eol, ctx, &match, 0); |
83b5d2f5 JH |
1001 | break; |
1002 | case GREP_NODE_NOT: | |
d7eb527d | 1003 | h = !match_expr_eval(x->u.unary, bol, eol, ctx, 0); |
0ab7befa | 1004 | break; |
83b5d2f5 | 1005 | case GREP_NODE_AND: |
d7eb527d | 1006 | if (!match_expr_eval(x->u.binary.left, bol, eol, ctx, 0)) |
252d560d | 1007 | return 0; |
d7eb527d | 1008 | h = match_expr_eval(x->u.binary.right, bol, eol, ctx, 0); |
0ab7befa | 1009 | break; |
83b5d2f5 | 1010 | case GREP_NODE_OR: |
0ab7befa | 1011 | if (!collect_hits) |
d7eb527d | 1012 | return (match_expr_eval(x->u.binary.left, |
0ab7befa | 1013 | bol, eol, ctx, 0) || |
d7eb527d | 1014 | match_expr_eval(x->u.binary.right, |
0ab7befa | 1015 | bol, eol, ctx, 0)); |
d7eb527d | 1016 | h = match_expr_eval(x->u.binary.left, bol, eol, ctx, 0); |
0ab7befa | 1017 | x->u.binary.left->hit |= h; |
d7eb527d | 1018 | h |= match_expr_eval(x->u.binary.right, bol, eol, ctx, 1); |
0ab7befa JH |
1019 | break; |
1020 | default: | |
d7530708 | 1021 | die("Unexpected node type (internal error) %d", x->node); |
83b5d2f5 | 1022 | } |
0ab7befa JH |
1023 | if (collect_hits) |
1024 | x->hit |= h; | |
1025 | return h; | |
83b5d2f5 JH |
1026 | } |
1027 | ||
480c1ca6 | 1028 | static int match_expr(struct grep_opt *opt, char *bol, char *eol, |
0ab7befa | 1029 | enum grep_context ctx, int collect_hits) |
83b5d2f5 JH |
1030 | { |
1031 | struct grep_expr *x = opt->pattern_expression; | |
d7eb527d | 1032 | return match_expr_eval(x, bol, eol, ctx, collect_hits); |
83b5d2f5 JH |
1033 | } |
1034 | ||
480c1ca6 | 1035 | static int match_line(struct grep_opt *opt, char *bol, char *eol, |
0ab7befa | 1036 | enum grep_context ctx, int collect_hits) |
83b5d2f5 JH |
1037 | { |
1038 | struct grep_pat *p; | |
79212772 RS |
1039 | regmatch_t match; |
1040 | ||
83b5d2f5 | 1041 | if (opt->extended) |
0ab7befa JH |
1042 | return match_expr(opt, bol, eol, ctx, collect_hits); |
1043 | ||
1044 | /* we do not call with collect_hits without being extended */ | |
83b5d2f5 | 1045 | for (p = opt->pattern_list; p; p = p->next) { |
79212772 | 1046 | if (match_one_pattern(p, bol, eol, ctx, &match, 0)) |
83b5d2f5 JH |
1047 | return 1; |
1048 | } | |
1049 | return 0; | |
1050 | } | |
1051 | ||
7e8f59d5 RS |
1052 | static int match_next_pattern(struct grep_pat *p, char *bol, char *eol, |
1053 | enum grep_context ctx, | |
1054 | regmatch_t *pmatch, int eflags) | |
1055 | { | |
1056 | regmatch_t match; | |
1057 | ||
1058 | if (!match_one_pattern(p, bol, eol, ctx, &match, eflags)) | |
1059 | return 0; | |
1060 | if (match.rm_so < 0 || match.rm_eo < 0) | |
1061 | return 0; | |
1062 | if (pmatch->rm_so >= 0 && pmatch->rm_eo >= 0) { | |
1063 | if (match.rm_so > pmatch->rm_so) | |
1064 | return 1; | |
1065 | if (match.rm_so == pmatch->rm_so && match.rm_eo < pmatch->rm_eo) | |
1066 | return 1; | |
1067 | } | |
1068 | pmatch->rm_so = match.rm_so; | |
1069 | pmatch->rm_eo = match.rm_eo; | |
1070 | return 1; | |
1071 | } | |
1072 | ||
1073 | static int next_match(struct grep_opt *opt, char *bol, char *eol, | |
1074 | enum grep_context ctx, regmatch_t *pmatch, int eflags) | |
1075 | { | |
1076 | struct grep_pat *p; | |
1077 | int hit = 0; | |
1078 | ||
1079 | pmatch->rm_so = pmatch->rm_eo = -1; | |
1080 | if (bol < eol) { | |
1081 | for (p = opt->pattern_list; p; p = p->next) { | |
1082 | switch (p->token) { | |
1083 | case GREP_PATTERN: /* atom */ | |
1084 | case GREP_PATTERN_HEAD: | |
1085 | case GREP_PATTERN_BODY: | |
1086 | hit |= match_next_pattern(p, bol, eol, ctx, | |
1087 | pmatch, eflags); | |
1088 | break; | |
1089 | default: | |
1090 | break; | |
1091 | } | |
1092 | } | |
1093 | } | |
1094 | return hit; | |
1095 | } | |
1096 | ||
1097 | static void show_line(struct grep_opt *opt, char *bol, char *eol, | |
1098 | const char *name, unsigned lno, char sign) | |
1099 | { | |
1100 | int rest = eol - bol; | |
79a77109 | 1101 | const char *match_color, *line_color = NULL; |
7e8f59d5 | 1102 | |
a8f0e764 RS |
1103 | if (opt->file_break && opt->last_shown == 0) { |
1104 | if (opt->show_hunk_mark) | |
1105 | opt->output(opt, "\n", 1); | |
ba8ea749 | 1106 | } else if (opt->pre_context || opt->post_context || opt->funcbody) { |
046802d0 | 1107 | if (opt->last_shown == 0) { |
55f638bd ML |
1108 | if (opt->show_hunk_mark) { |
1109 | output_color(opt, "--", 2, opt->color_sep); | |
1110 | opt->output(opt, "\n", 1); | |
07b838f0 | 1111 | } |
55f638bd ML |
1112 | } else if (lno > opt->last_shown + 1) { |
1113 | output_color(opt, "--", 2, opt->color_sep); | |
1114 | opt->output(opt, "\n", 1); | |
1115 | } | |
5dd06d38 | 1116 | } |
1d84f72e RS |
1117 | if (opt->heading && opt->last_shown == 0) { |
1118 | output_color(opt, name, strlen(name), opt->color_filename); | |
1119 | opt->output(opt, "\n", 1); | |
1120 | } | |
5dd06d38 RS |
1121 | opt->last_shown = lno; |
1122 | ||
1d84f72e | 1123 | if (!opt->heading && opt->pathname) { |
55f638bd ML |
1124 | output_color(opt, name, strlen(name), opt->color_filename); |
1125 | output_sep(opt, sign); | |
5b594f45 FK |
1126 | } |
1127 | if (opt->linenum) { | |
1128 | char buf[32]; | |
1129 | snprintf(buf, sizeof(buf), "%d", lno); | |
55f638bd ML |
1130 | output_color(opt, buf, strlen(buf), opt->color_lineno); |
1131 | output_sep(opt, sign); | |
5b594f45 | 1132 | } |
7e8f59d5 RS |
1133 | if (opt->color) { |
1134 | regmatch_t match; | |
1135 | enum grep_context ctx = GREP_CONTEXT_BODY; | |
1136 | int ch = *eol; | |
1137 | int eflags = 0; | |
1138 | ||
79a77109 RS |
1139 | if (sign == ':') |
1140 | match_color = opt->color_match_selected; | |
1141 | else | |
1142 | match_color = opt->color_match_context; | |
00588bb5 ML |
1143 | if (sign == ':') |
1144 | line_color = opt->color_selected; | |
1145 | else if (sign == '-') | |
1146 | line_color = opt->color_context; | |
1147 | else if (sign == '=') | |
1148 | line_color = opt->color_function; | |
7e8f59d5 RS |
1149 | *eol = '\0'; |
1150 | while (next_match(opt, bol, eol, ctx, &match, eflags)) { | |
1f5b9cc4 RS |
1151 | if (match.rm_so == match.rm_eo) |
1152 | break; | |
5b594f45 | 1153 | |
00588bb5 | 1154 | output_color(opt, bol, match.rm_so, line_color); |
55f638bd | 1155 | output_color(opt, bol + match.rm_so, |
79a77109 | 1156 | match.rm_eo - match.rm_so, match_color); |
7e8f59d5 RS |
1157 | bol += match.rm_eo; |
1158 | rest -= match.rm_eo; | |
1159 | eflags = REG_NOTBOL; | |
1160 | } | |
1161 | *eol = ch; | |
1162 | } | |
00588bb5 | 1163 | output_color(opt, bol, rest, line_color); |
5b594f45 | 1164 | opt->output(opt, "\n", 1); |
7e8f59d5 RS |
1165 | } |
1166 | ||
0579f91d | 1167 | #ifndef NO_PTHREADS |
78db6ea9 JK |
1168 | int grep_use_locks; |
1169 | ||
0579f91d TR |
1170 | /* |
1171 | * This lock protects access to the gitattributes machinery, which is | |
1172 | * not thread-safe. | |
1173 | */ | |
1174 | pthread_mutex_t grep_attr_mutex; | |
1175 | ||
78db6ea9 | 1176 | static inline void grep_attr_lock(void) |
0579f91d | 1177 | { |
78db6ea9 | 1178 | if (grep_use_locks) |
0579f91d TR |
1179 | pthread_mutex_lock(&grep_attr_mutex); |
1180 | } | |
1181 | ||
78db6ea9 | 1182 | static inline void grep_attr_unlock(void) |
0579f91d | 1183 | { |
78db6ea9 | 1184 | if (grep_use_locks) |
0579f91d TR |
1185 | pthread_mutex_unlock(&grep_attr_mutex); |
1186 | } | |
b3aeb285 JK |
1187 | |
1188 | /* | |
1189 | * Same as git_attr_mutex, but protecting the thread-unsafe object db access. | |
1190 | */ | |
1191 | pthread_mutex_t grep_read_mutex; | |
1192 | ||
0579f91d | 1193 | #else |
78db6ea9 JK |
1194 | #define grep_attr_lock() |
1195 | #define grep_attr_unlock() | |
0579f91d TR |
1196 | #endif |
1197 | ||
e1327023 | 1198 | static int match_funcname(struct grep_opt *opt, struct grep_source *gs, char *bol, char *eol) |
2944e4e6 | 1199 | { |
60ecac98 | 1200 | xdemitconf_t *xecfg = opt->priv; |
0579f91d | 1201 | if (xecfg && !xecfg->find_func) { |
94ad9d9e JK |
1202 | grep_source_load_driver(gs); |
1203 | if (gs->driver->funcname.pattern) { | |
1204 | const struct userdiff_funcname *pe = &gs->driver->funcname; | |
0579f91d TR |
1205 | xdiff_set_find_func(xecfg, pe->pattern, pe->cflags); |
1206 | } else { | |
1207 | xecfg = opt->priv = NULL; | |
1208 | } | |
1209 | } | |
1210 | ||
1211 | if (xecfg) { | |
60ecac98 RS |
1212 | char buf[1]; |
1213 | return xecfg->find_func(bol, eol - bol, buf, 1, | |
1214 | xecfg->find_func_priv) >= 0; | |
1215 | } | |
1216 | ||
2944e4e6 RS |
1217 | if (bol == eol) |
1218 | return 0; | |
1219 | if (isalpha(*bol) || *bol == '_' || *bol == '$') | |
1220 | return 1; | |
1221 | return 0; | |
1222 | } | |
1223 | ||
e1327023 JK |
1224 | static void show_funcname_line(struct grep_opt *opt, struct grep_source *gs, |
1225 | char *bol, unsigned lno) | |
2944e4e6 | 1226 | { |
e1327023 | 1227 | while (bol > gs->buf) { |
2944e4e6 RS |
1228 | char *eol = --bol; |
1229 | ||
e1327023 | 1230 | while (bol > gs->buf && bol[-1] != '\n') |
2944e4e6 RS |
1231 | bol--; |
1232 | lno--; | |
1233 | ||
1234 | if (lno <= opt->last_shown) | |
1235 | break; | |
1236 | ||
e1327023 JK |
1237 | if (match_funcname(opt, gs, bol, eol)) { |
1238 | show_line(opt, bol, eol, gs->name, lno, '='); | |
2944e4e6 RS |
1239 | break; |
1240 | } | |
1241 | } | |
1242 | } | |
1243 | ||
e1327023 | 1244 | static void show_pre_context(struct grep_opt *opt, struct grep_source *gs, |
ba8ea749 | 1245 | char *bol, char *end, unsigned lno) |
49de3216 | 1246 | { |
2944e4e6 | 1247 | unsigned cur = lno, from = 1, funcname_lno = 0; |
ba8ea749 RS |
1248 | int funcname_needed = !!opt->funcname; |
1249 | ||
e1327023 | 1250 | if (opt->funcbody && !match_funcname(opt, gs, bol, end)) |
ba8ea749 | 1251 | funcname_needed = 2; |
49de3216 RS |
1252 | |
1253 | if (opt->pre_context < lno) | |
1254 | from = lno - opt->pre_context; | |
1255 | if (from <= opt->last_shown) | |
1256 | from = opt->last_shown + 1; | |
1257 | ||
1258 | /* Rewind. */ | |
e1327023 | 1259 | while (bol > gs->buf && |
ba8ea749 | 1260 | cur > (funcname_needed == 2 ? opt->last_shown + 1 : from)) { |
2944e4e6 RS |
1261 | char *eol = --bol; |
1262 | ||
e1327023 | 1263 | while (bol > gs->buf && bol[-1] != '\n') |
49de3216 RS |
1264 | bol--; |
1265 | cur--; | |
e1327023 | 1266 | if (funcname_needed && match_funcname(opt, gs, bol, eol)) { |
2944e4e6 RS |
1267 | funcname_lno = cur; |
1268 | funcname_needed = 0; | |
1269 | } | |
49de3216 RS |
1270 | } |
1271 | ||
2944e4e6 RS |
1272 | /* We need to look even further back to find a function signature. */ |
1273 | if (opt->funcname && funcname_needed) | |
e1327023 | 1274 | show_funcname_line(opt, gs, bol, cur); |
2944e4e6 | 1275 | |
49de3216 RS |
1276 | /* Back forward. */ |
1277 | while (cur < lno) { | |
2944e4e6 | 1278 | char *eol = bol, sign = (cur == funcname_lno) ? '=' : '-'; |
49de3216 RS |
1279 | |
1280 | while (*eol != '\n') | |
1281 | eol++; | |
e1327023 | 1282 | show_line(opt, bol, eol, gs->name, cur, sign); |
49de3216 RS |
1283 | bol = eol + 1; |
1284 | cur++; | |
1285 | } | |
1286 | } | |
1287 | ||
a26345b6 JH |
1288 | static int should_lookahead(struct grep_opt *opt) |
1289 | { | |
1290 | struct grep_pat *p; | |
1291 | ||
1292 | if (opt->extended) | |
1293 | return 0; /* punt for too complex stuff */ | |
1294 | if (opt->invert) | |
1295 | return 0; | |
1296 | for (p = opt->pattern_list; p; p = p->next) { | |
1297 | if (p->token != GREP_PATTERN) | |
1298 | return 0; /* punt for "header only" and stuff */ | |
1299 | } | |
1300 | return 1; | |
1301 | } | |
1302 | ||
1303 | static int look_ahead(struct grep_opt *opt, | |
1304 | unsigned long *left_p, | |
1305 | unsigned *lno_p, | |
1306 | char **bol_p) | |
1307 | { | |
1308 | unsigned lno = *lno_p; | |
1309 | char *bol = *bol_p; | |
1310 | struct grep_pat *p; | |
1311 | char *sp, *last_bol; | |
1312 | regoff_t earliest = -1; | |
1313 | ||
1314 | for (p = opt->pattern_list; p; p = p->next) { | |
1315 | int hit; | |
1316 | regmatch_t m; | |
1317 | ||
97e77784 | 1318 | hit = patmatch(p, bol, bol + *left_p, &m, 0); |
a26345b6 JH |
1319 | if (!hit || m.rm_so < 0 || m.rm_eo < 0) |
1320 | continue; | |
1321 | if (earliest < 0 || m.rm_so < earliest) | |
1322 | earliest = m.rm_so; | |
1323 | } | |
1324 | ||
1325 | if (earliest < 0) { | |
1326 | *bol_p = bol + *left_p; | |
1327 | *left_p = 0; | |
1328 | return 1; | |
1329 | } | |
1330 | for (sp = bol + earliest; bol < sp && sp[-1] != '\n'; sp--) | |
1331 | ; /* find the beginning of the line */ | |
1332 | last_bol = sp; | |
1333 | ||
1334 | for (sp = bol; sp < last_bol; sp++) { | |
1335 | if (*sp == '\n') | |
1336 | lno++; | |
1337 | } | |
1338 | *left_p -= last_bol - bol; | |
1339 | *bol_p = last_bol; | |
1340 | *lno_p = lno; | |
1341 | return 0; | |
1342 | } | |
1343 | ||
5b594f45 FK |
1344 | static void std_output(struct grep_opt *opt, const void *buf, size_t size) |
1345 | { | |
1346 | fwrite(buf, size, 1, stdout); | |
1347 | } | |
1348 | ||
335ec3bf JK |
1349 | static int fill_textconv_grep(struct userdiff_driver *driver, |
1350 | struct grep_source *gs) | |
1351 | { | |
1352 | struct diff_filespec *df; | |
1353 | char *buf; | |
1354 | size_t size; | |
1355 | ||
1356 | if (!driver || !driver->textconv) | |
1357 | return grep_source_load(gs); | |
1358 | ||
1359 | /* | |
1360 | * The textconv interface is intimately tied to diff_filespecs, so we | |
1361 | * have to pretend to be one. If we could unify the grep_source | |
1362 | * and diff_filespec structs, this mess could just go away. | |
1363 | */ | |
1364 | df = alloc_filespec(gs->path); | |
1365 | switch (gs->type) { | |
1366 | case GREP_SOURCE_SHA1: | |
1367 | fill_filespec(df, gs->identifier, 1, 0100644); | |
1368 | break; | |
1369 | case GREP_SOURCE_FILE: | |
1370 | fill_filespec(df, null_sha1, 0, 0100644); | |
1371 | break; | |
1372 | default: | |
1373 | die("BUG: attempt to textconv something without a path?"); | |
1374 | } | |
1375 | ||
1376 | /* | |
1377 | * fill_textconv is not remotely thread-safe; it may load objects | |
1378 | * behind the scenes, and it modifies the global diff tempfile | |
1379 | * structure. | |
1380 | */ | |
1381 | grep_read_lock(); | |
1382 | size = fill_textconv(driver, df, &buf); | |
1383 | grep_read_unlock(); | |
1384 | free_filespec(df); | |
1385 | ||
1386 | /* | |
1387 | * The normal fill_textconv usage by the diff machinery would just keep | |
1388 | * the textconv'd buf separate from the diff_filespec. But much of the | |
1389 | * grep code passes around a grep_source and assumes that its "buf" | |
1390 | * pointer is the beginning of the thing we are searching. So let's | |
1391 | * install our textconv'd version into the grep_source, taking care not | |
1392 | * to leak any existing buffer. | |
1393 | */ | |
1394 | grep_source_clear_data(gs); | |
1395 | gs->buf = buf; | |
1396 | gs->size = size; | |
1397 | ||
1398 | return 0; | |
1399 | } | |
1400 | ||
e1327023 | 1401 | static int grep_source_1(struct grep_opt *opt, struct grep_source *gs, int collect_hits) |
83b5d2f5 | 1402 | { |
e1327023 JK |
1403 | char *bol; |
1404 | unsigned long left; | |
83b5d2f5 | 1405 | unsigned lno = 1; |
83b5d2f5 | 1406 | unsigned last_hit = 0; |
83b5d2f5 | 1407 | int binary_match_only = 0; |
83b5d2f5 | 1408 | unsigned count = 0; |
a26345b6 | 1409 | int try_lookahead = 0; |
ba8ea749 | 1410 | int show_function = 0; |
335ec3bf | 1411 | struct userdiff_driver *textconv = NULL; |
480c1ca6 | 1412 | enum grep_context ctx = GREP_CONTEXT_HEAD; |
60ecac98 | 1413 | xdemitconf_t xecfg; |
83b5d2f5 | 1414 | |
5b594f45 FK |
1415 | if (!opt->output) |
1416 | opt->output = std_output; | |
1417 | ||
ba8ea749 RS |
1418 | if (opt->pre_context || opt->post_context || opt->file_break || |
1419 | opt->funcbody) { | |
08303c36 RS |
1420 | /* Show hunk marks, except for the first file. */ |
1421 | if (opt->last_shown) | |
1422 | opt->show_hunk_mark = 1; | |
1423 | /* | |
1424 | * If we're using threads then we can't easily identify | |
1425 | * the first file. Always put hunk marks in that case | |
1426 | * and skip the very first one later in work_done(). | |
1427 | */ | |
1428 | if (opt->output != std_output) | |
1429 | opt->show_hunk_mark = 1; | |
1430 | } | |
431d6e7b RS |
1431 | opt->last_shown = 0; |
1432 | ||
335ec3bf JK |
1433 | if (opt->allow_textconv) { |
1434 | grep_source_load_driver(gs); | |
1435 | /* | |
1436 | * We might set up the shared textconv cache data here, which | |
1437 | * is not thread-safe. | |
1438 | */ | |
1439 | grep_attr_lock(); | |
1440 | textconv = userdiff_get_textconv(gs->driver); | |
1441 | grep_attr_unlock(); | |
1442 | } | |
1443 | ||
1444 | /* | |
1445 | * We know the result of a textconv is text, so we only have to care | |
1446 | * about binary handling if we are not using it. | |
1447 | */ | |
1448 | if (!textconv) { | |
1449 | switch (opt->binary) { | |
1450 | case GREP_BINARY_DEFAULT: | |
1451 | if (grep_source_is_binary(gs)) | |
1452 | binary_match_only = 1; | |
1453 | break; | |
1454 | case GREP_BINARY_NOMATCH: | |
1455 | if (grep_source_is_binary(gs)) | |
1456 | return 0; /* Assume unmatch */ | |
1457 | break; | |
1458 | case GREP_BINARY_TEXT: | |
1459 | break; | |
1460 | default: | |
1461 | die("bug: unknown binary handling mode"); | |
1462 | } | |
83b5d2f5 JH |
1463 | } |
1464 | ||
60ecac98 | 1465 | memset(&xecfg, 0, sizeof(xecfg)); |
0579f91d TR |
1466 | opt->priv = &xecfg; |
1467 | ||
a26345b6 | 1468 | try_lookahead = should_lookahead(opt); |
60ecac98 | 1469 | |
335ec3bf | 1470 | if (fill_textconv_grep(textconv, gs) < 0) |
08265798 JK |
1471 | return 0; |
1472 | ||
e1327023 JK |
1473 | bol = gs->buf; |
1474 | left = gs->size; | |
83b5d2f5 JH |
1475 | while (left) { |
1476 | char *eol, ch; | |
0ab7befa | 1477 | int hit; |
83b5d2f5 | 1478 | |
a26345b6 | 1479 | /* |
8997da38 | 1480 | * look_ahead() skips quickly to the line that possibly |
a26345b6 JH |
1481 | * has the next hit; don't call it if we need to do |
1482 | * something more than just skipping the current line | |
1483 | * in response to an unmatch for the current line. E.g. | |
1484 | * inside a post-context window, we will show the current | |
1485 | * line as a context around the previous hit when it | |
1486 | * doesn't hit. | |
1487 | */ | |
1488 | if (try_lookahead | |
1489 | && !(last_hit | |
ba8ea749 RS |
1490 | && (show_function || |
1491 | lno <= last_hit + opt->post_context)) | |
a26345b6 JH |
1492 | && look_ahead(opt, &left, &lno, &bol)) |
1493 | break; | |
83b5d2f5 JH |
1494 | eol = end_of_line(bol, &left); |
1495 | ch = *eol; | |
1496 | *eol = 0; | |
1497 | ||
480c1ca6 JH |
1498 | if ((ctx == GREP_CONTEXT_HEAD) && (eol == bol)) |
1499 | ctx = GREP_CONTEXT_BODY; | |
1500 | ||
0ab7befa | 1501 | hit = match_line(opt, bol, eol, ctx, collect_hits); |
83b5d2f5 JH |
1502 | *eol = ch; |
1503 | ||
0ab7befa JH |
1504 | if (collect_hits) |
1505 | goto next_line; | |
1506 | ||
83b5d2f5 JH |
1507 | /* "grep -v -e foo -e bla" should list lines |
1508 | * that do not have either, so inversion should | |
1509 | * be done outside. | |
1510 | */ | |
1511 | if (opt->invert) | |
1512 | hit = !hit; | |
1513 | if (opt->unmatch_name_only) { | |
1514 | if (hit) | |
1515 | return 0; | |
1516 | goto next_line; | |
1517 | } | |
1518 | if (hit) { | |
1519 | count++; | |
1520 | if (opt->status_only) | |
1521 | return 1; | |
321ffcc0 | 1522 | if (opt->name_only) { |
e1327023 | 1523 | show_name(opt, gs->name); |
321ffcc0 RS |
1524 | return 1; |
1525 | } | |
c30c10cf RS |
1526 | if (opt->count) |
1527 | goto next_line; | |
83b5d2f5 | 1528 | if (binary_match_only) { |
5b594f45 | 1529 | opt->output(opt, "Binary file ", 12); |
e1327023 | 1530 | output_color(opt, gs->name, strlen(gs->name), |
55f638bd | 1531 | opt->color_filename); |
5b594f45 | 1532 | opt->output(opt, " matches\n", 9); |
83b5d2f5 JH |
1533 | return 1; |
1534 | } | |
83b5d2f5 JH |
1535 | /* Hit at this line. If we haven't shown the |
1536 | * pre-context lines, we would need to show them. | |
83b5d2f5 | 1537 | */ |
ba8ea749 | 1538 | if (opt->pre_context || opt->funcbody) |
e1327023 | 1539 | show_pre_context(opt, gs, bol, eol, lno); |
2944e4e6 | 1540 | else if (opt->funcname) |
e1327023 JK |
1541 | show_funcname_line(opt, gs, bol, lno); |
1542 | show_line(opt, bol, eol, gs->name, lno, ':'); | |
5dd06d38 | 1543 | last_hit = lno; |
ba8ea749 RS |
1544 | if (opt->funcbody) |
1545 | show_function = 1; | |
1546 | goto next_line; | |
83b5d2f5 | 1547 | } |
e1327023 | 1548 | if (show_function && match_funcname(opt, gs, bol, eol)) |
ba8ea749 RS |
1549 | show_function = 0; |
1550 | if (show_function || | |
1551 | (last_hit && lno <= last_hit + opt->post_context)) { | |
83b5d2f5 JH |
1552 | /* If the last hit is within the post context, |
1553 | * we need to show this line. | |
1554 | */ | |
e1327023 | 1555 | show_line(opt, bol, eol, gs->name, lno, '-'); |
83b5d2f5 | 1556 | } |
83b5d2f5 JH |
1557 | |
1558 | next_line: | |
1559 | bol = eol + 1; | |
1560 | if (!left) | |
1561 | break; | |
1562 | left--; | |
1563 | lno++; | |
1564 | } | |
1565 | ||
0ab7befa JH |
1566 | if (collect_hits) |
1567 | return 0; | |
b48fb5b6 | 1568 | |
83b5d2f5 JH |
1569 | if (opt->status_only) |
1570 | return 0; | |
1571 | if (opt->unmatch_name_only) { | |
1572 | /* We did not see any hit, so we want to show this */ | |
e1327023 | 1573 | show_name(opt, gs->name); |
83b5d2f5 JH |
1574 | return 1; |
1575 | } | |
1576 | ||
60ecac98 RS |
1577 | xdiff_clear_find_func(&xecfg); |
1578 | opt->priv = NULL; | |
1579 | ||
83b5d2f5 JH |
1580 | /* NEEDSWORK: |
1581 | * The real "grep -c foo *.c" gives many "bar.c:0" lines, | |
1582 | * which feels mostly useless but sometimes useful. Maybe | |
1583 | * make it another option? For now suppress them. | |
1584 | */ | |
5b594f45 FK |
1585 | if (opt->count && count) { |
1586 | char buf[32]; | |
f76d947a RS |
1587 | if (opt->pathname) { |
1588 | output_color(opt, gs->name, strlen(gs->name), | |
1589 | opt->color_filename); | |
1590 | output_sep(opt, ':'); | |
1591 | } | |
55f638bd | 1592 | snprintf(buf, sizeof(buf), "%u\n", count); |
5b594f45 | 1593 | opt->output(opt, buf, strlen(buf)); |
c30c10cf | 1594 | return 1; |
5b594f45 | 1595 | } |
83b5d2f5 JH |
1596 | return !!last_hit; |
1597 | } | |
1598 | ||
0ab7befa JH |
1599 | static void clr_hit_marker(struct grep_expr *x) |
1600 | { | |
1601 | /* All-hit markers are meaningful only at the very top level | |
1602 | * OR node. | |
1603 | */ | |
1604 | while (1) { | |
1605 | x->hit = 0; | |
1606 | if (x->node != GREP_NODE_OR) | |
1607 | return; | |
1608 | x->u.binary.left->hit = 0; | |
1609 | x = x->u.binary.right; | |
1610 | } | |
1611 | } | |
1612 | ||
1613 | static int chk_hit_marker(struct grep_expr *x) | |
1614 | { | |
1615 | /* Top level nodes have hit markers. See if they all are hits */ | |
1616 | while (1) { | |
1617 | if (x->node != GREP_NODE_OR) | |
1618 | return x->hit; | |
1619 | if (!x->u.binary.left->hit) | |
1620 | return 0; | |
1621 | x = x->u.binary.right; | |
1622 | } | |
1623 | } | |
1624 | ||
e1327023 | 1625 | int grep_source(struct grep_opt *opt, struct grep_source *gs) |
0ab7befa JH |
1626 | { |
1627 | /* | |
1628 | * we do not have to do the two-pass grep when we do not check | |
1629 | * buffer-wide "all-match". | |
1630 | */ | |
1631 | if (!opt->all_match) | |
e1327023 | 1632 | return grep_source_1(opt, gs, 0); |
0ab7befa JH |
1633 | |
1634 | /* Otherwise the toplevel "or" terms hit a bit differently. | |
1635 | * We first clear hit markers from them. | |
1636 | */ | |
1637 | clr_hit_marker(opt->pattern_expression); | |
e1327023 | 1638 | grep_source_1(opt, gs, 1); |
0ab7befa JH |
1639 | |
1640 | if (!chk_hit_marker(opt->pattern_expression)) | |
1641 | return 0; | |
1642 | ||
e1327023 JK |
1643 | return grep_source_1(opt, gs, 0); |
1644 | } | |
1645 | ||
c876d6da | 1646 | int grep_buffer(struct grep_opt *opt, char *buf, unsigned long size) |
e1327023 JK |
1647 | { |
1648 | struct grep_source gs; | |
1649 | int r; | |
1650 | ||
55c61688 | 1651 | grep_source_init(&gs, GREP_SOURCE_BUF, NULL, NULL, NULL); |
e1327023 JK |
1652 | gs.buf = buf; |
1653 | gs.size = size; | |
1654 | ||
1655 | r = grep_source(opt, &gs); | |
1656 | ||
1657 | grep_source_clear(&gs); | |
1658 | return r; | |
1659 | } | |
1660 | ||
1661 | void grep_source_init(struct grep_source *gs, enum grep_source_type type, | |
55c61688 NTND |
1662 | const char *name, const char *path, |
1663 | const void *identifier) | |
e1327023 JK |
1664 | { |
1665 | gs->type = type; | |
8c53f071 JK |
1666 | gs->name = xstrdup_or_null(name); |
1667 | gs->path = xstrdup_or_null(path); | |
e1327023 JK |
1668 | gs->buf = NULL; |
1669 | gs->size = 0; | |
94ad9d9e | 1670 | gs->driver = NULL; |
e1327023 JK |
1671 | |
1672 | switch (type) { | |
1673 | case GREP_SOURCE_FILE: | |
1674 | gs->identifier = xstrdup(identifier); | |
1675 | break; | |
1676 | case GREP_SOURCE_SHA1: | |
1677 | gs->identifier = xmalloc(20); | |
50546b15 | 1678 | hashcpy(gs->identifier, identifier); |
e1327023 JK |
1679 | break; |
1680 | case GREP_SOURCE_BUF: | |
1681 | gs->identifier = NULL; | |
1682 | } | |
1683 | } | |
1684 | ||
1685 | void grep_source_clear(struct grep_source *gs) | |
1686 | { | |
1687 | free(gs->name); | |
1688 | gs->name = NULL; | |
55c61688 NTND |
1689 | free(gs->path); |
1690 | gs->path = NULL; | |
e1327023 JK |
1691 | free(gs->identifier); |
1692 | gs->identifier = NULL; | |
1693 | grep_source_clear_data(gs); | |
1694 | } | |
1695 | ||
1696 | void grep_source_clear_data(struct grep_source *gs) | |
1697 | { | |
1698 | switch (gs->type) { | |
1699 | case GREP_SOURCE_FILE: | |
1700 | case GREP_SOURCE_SHA1: | |
1701 | free(gs->buf); | |
1702 | gs->buf = NULL; | |
1703 | gs->size = 0; | |
1704 | break; | |
1705 | case GREP_SOURCE_BUF: | |
1706 | /* leave user-provided buf intact */ | |
1707 | break; | |
1708 | } | |
1709 | } | |
1710 | ||
1711 | static int grep_source_load_sha1(struct grep_source *gs) | |
1712 | { | |
1713 | enum object_type type; | |
1714 | ||
1715 | grep_read_lock(); | |
1716 | gs->buf = read_sha1_file(gs->identifier, &type, &gs->size); | |
1717 | grep_read_unlock(); | |
1718 | ||
1719 | if (!gs->buf) | |
1720 | return error(_("'%s': unable to read %s"), | |
1721 | gs->name, | |
1722 | sha1_to_hex(gs->identifier)); | |
1723 | return 0; | |
1724 | } | |
1725 | ||
1726 | static int grep_source_load_file(struct grep_source *gs) | |
1727 | { | |
1728 | const char *filename = gs->identifier; | |
1729 | struct stat st; | |
1730 | char *data; | |
1731 | size_t size; | |
1732 | int i; | |
1733 | ||
1734 | if (lstat(filename, &st) < 0) { | |
1735 | err_ret: | |
1736 | if (errno != ENOENT) | |
1737 | error(_("'%s': %s"), filename, strerror(errno)); | |
1738 | return -1; | |
1739 | } | |
1740 | if (!S_ISREG(st.st_mode)) | |
1741 | return -1; | |
1742 | size = xsize_t(st.st_size); | |
1743 | i = open(filename, O_RDONLY); | |
1744 | if (i < 0) | |
1745 | goto err_ret; | |
1746 | data = xmalloc(size + 1); | |
1747 | if (st.st_size != read_in_full(i, data, size)) { | |
1748 | error(_("'%s': short read %s"), filename, strerror(errno)); | |
1749 | close(i); | |
1750 | free(data); | |
1751 | return -1; | |
1752 | } | |
1753 | close(i); | |
1754 | data[size] = 0; | |
1755 | ||
1756 | gs->buf = data; | |
1757 | gs->size = size; | |
1758 | return 0; | |
1759 | } | |
1760 | ||
3083301e | 1761 | static int grep_source_load(struct grep_source *gs) |
e1327023 JK |
1762 | { |
1763 | if (gs->buf) | |
1764 | return 0; | |
1765 | ||
1766 | switch (gs->type) { | |
1767 | case GREP_SOURCE_FILE: | |
1768 | return grep_source_load_file(gs); | |
1769 | case GREP_SOURCE_SHA1: | |
1770 | return grep_source_load_sha1(gs); | |
1771 | case GREP_SOURCE_BUF: | |
1772 | return gs->buf ? 0 : -1; | |
1773 | } | |
1774 | die("BUG: invalid grep_source type"); | |
0ab7befa | 1775 | } |
94ad9d9e JK |
1776 | |
1777 | void grep_source_load_driver(struct grep_source *gs) | |
1778 | { | |
1779 | if (gs->driver) | |
1780 | return; | |
1781 | ||
1782 | grep_attr_lock(); | |
55c61688 NTND |
1783 | if (gs->path) |
1784 | gs->driver = userdiff_find_by_path(gs->path); | |
94ad9d9e JK |
1785 | if (!gs->driver) |
1786 | gs->driver = userdiff_find_by_name("default"); | |
1787 | grep_attr_unlock(); | |
1788 | } | |
41b59bfc | 1789 | |
3083301e | 1790 | static int grep_source_is_binary(struct grep_source *gs) |
41b59bfc JK |
1791 | { |
1792 | grep_source_load_driver(gs); | |
1793 | if (gs->driver->binary != -1) | |
1794 | return gs->driver->binary; | |
1795 | ||
1796 | if (!grep_source_load(gs)) | |
1797 | return buffer_is_binary(gs->buf, gs->size); | |
1798 | ||
1799 | return 0; | |
1800 | } |