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Commit | Line | Data |
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83b5d2f5 | 1 | #include "cache.h" |
b2141fc1 | 2 | #include "config.h" |
83b5d2f5 | 3 | #include "grep.h" |
60ecac98 | 4 | #include "userdiff.h" |
6bfce93e | 5 | #include "xdiff-interface.h" |
335ec3bf JK |
6 | #include "diff.h" |
7 | #include "diffcore.h" | |
5c1ebcca | 8 | #include "commit.h" |
793dc676 | 9 | #include "quote.h" |
83b5d2f5 | 10 | |
07a7d656 JH |
11 | static int grep_source_load(struct grep_source *gs); |
12 | static int grep_source_is_binary(struct grep_source *gs); | |
13 | ||
7687a054 JH |
14 | static struct grep_opt grep_defaults; |
15 | ||
379642bc BW |
16 | static void std_output(struct grep_opt *opt, const void *buf, size_t size) |
17 | { | |
18 | fwrite(buf, size, 1, stdout); | |
19 | } | |
20 | ||
7687a054 JH |
21 | /* |
22 | * Initialize the grep_defaults template with hardcoded defaults. | |
23 | * We could let the compiler do this, but without C99 initializers | |
24 | * the code gets unwieldy and unreadable, so... | |
25 | */ | |
26 | void init_grep_defaults(void) | |
27 | { | |
28 | struct grep_opt *opt = &grep_defaults; | |
918d4e1c JH |
29 | static int run_once; |
30 | ||
31 | if (run_once) | |
32 | return; | |
33 | run_once++; | |
7687a054 JH |
34 | |
35 | memset(opt, 0, sizeof(*opt)); | |
36 | opt->relative = 1; | |
37 | opt->pathname = 1; | |
7687a054 JH |
38 | opt->max_depth = -1; |
39 | opt->pattern_type_option = GREP_PATTERN_TYPE_UNSPECIFIED; | |
7ce4fb94 JK |
40 | color_set(opt->color_context, ""); |
41 | color_set(opt->color_filename, ""); | |
42 | color_set(opt->color_function, ""); | |
43 | color_set(opt->color_lineno, ""); | |
44 | color_set(opt->color_match_context, GIT_COLOR_BOLD_RED); | |
45 | color_set(opt->color_match_selected, GIT_COLOR_BOLD_RED); | |
46 | color_set(opt->color_selected, ""); | |
47 | color_set(opt->color_sep, GIT_COLOR_CYAN); | |
7687a054 | 48 | opt->color = -1; |
379642bc | 49 | opt->output = std_output; |
7687a054 JH |
50 | } |
51 | ||
52 | static int parse_pattern_type_arg(const char *opt, const char *arg) | |
53 | { | |
54 | if (!strcmp(arg, "default")) | |
55 | return GREP_PATTERN_TYPE_UNSPECIFIED; | |
56 | else if (!strcmp(arg, "basic")) | |
57 | return GREP_PATTERN_TYPE_BRE; | |
58 | else if (!strcmp(arg, "extended")) | |
59 | return GREP_PATTERN_TYPE_ERE; | |
60 | else if (!strcmp(arg, "fixed")) | |
61 | return GREP_PATTERN_TYPE_FIXED; | |
62 | else if (!strcmp(arg, "perl")) | |
63 | return GREP_PATTERN_TYPE_PCRE; | |
64 | die("bad %s argument: %s", opt, arg); | |
65 | } | |
66 | ||
67 | /* | |
68 | * Read the configuration file once and store it in | |
69 | * the grep_defaults template. | |
70 | */ | |
71 | int grep_config(const char *var, const char *value, void *cb) | |
72 | { | |
73 | struct grep_opt *opt = &grep_defaults; | |
74 | char *color = NULL; | |
75 | ||
76 | if (userdiff_config(var, value) < 0) | |
77 | return -1; | |
78 | ||
79 | if (!strcmp(var, "grep.extendedregexp")) { | |
c7e38551 | 80 | opt->extended_regexp_option = git_config_bool(var, value); |
7687a054 JH |
81 | return 0; |
82 | } | |
83 | ||
84 | if (!strcmp(var, "grep.patterntype")) { | |
85 | opt->pattern_type_option = parse_pattern_type_arg(var, value); | |
86 | return 0; | |
87 | } | |
88 | ||
89 | if (!strcmp(var, "grep.linenumber")) { | |
90 | opt->linenum = git_config_bool(var, value); | |
91 | return 0; | |
92 | } | |
93 | ||
6453f7b3 AS |
94 | if (!strcmp(var, "grep.fullname")) { |
95 | opt->relative = !git_config_bool(var, value); | |
96 | return 0; | |
97 | } | |
98 | ||
7687a054 JH |
99 | if (!strcmp(var, "color.grep")) |
100 | opt->color = git_config_colorbool(var, value); | |
101 | else if (!strcmp(var, "color.grep.context")) | |
102 | color = opt->color_context; | |
103 | else if (!strcmp(var, "color.grep.filename")) | |
104 | color = opt->color_filename; | |
105 | else if (!strcmp(var, "color.grep.function")) | |
106 | color = opt->color_function; | |
107 | else if (!strcmp(var, "color.grep.linenumber")) | |
108 | color = opt->color_lineno; | |
79a77109 RS |
109 | else if (!strcmp(var, "color.grep.matchcontext")) |
110 | color = opt->color_match_context; | |
111 | else if (!strcmp(var, "color.grep.matchselected")) | |
112 | color = opt->color_match_selected; | |
7687a054 JH |
113 | else if (!strcmp(var, "color.grep.selected")) |
114 | color = opt->color_selected; | |
115 | else if (!strcmp(var, "color.grep.separator")) | |
116 | color = opt->color_sep; | |
79a77109 RS |
117 | else if (!strcmp(var, "color.grep.match")) { |
118 | int rc = 0; | |
119 | if (!value) | |
120 | return config_error_nonbool(var); | |
bf1f639e JH |
121 | rc |= color_parse(value, opt->color_match_context); |
122 | rc |= color_parse(value, opt->color_match_selected); | |
79a77109 RS |
123 | return rc; |
124 | } | |
7687a054 JH |
125 | |
126 | if (color) { | |
127 | if (!value) | |
128 | return config_error_nonbool(var); | |
f6c5a296 | 129 | return color_parse(value, color); |
7687a054 JH |
130 | } |
131 | return 0; | |
132 | } | |
133 | ||
134 | /* | |
135 | * Initialize one instance of grep_opt and copy the | |
136 | * default values from the template we read the configuration | |
137 | * information in an earlier call to git_config(grep_config). | |
138 | */ | |
139 | void grep_init(struct grep_opt *opt, const char *prefix) | |
140 | { | |
141 | struct grep_opt *def = &grep_defaults; | |
142 | ||
143 | memset(opt, 0, sizeof(*opt)); | |
144 | opt->prefix = prefix; | |
145 | opt->prefix_length = (prefix && *prefix) ? strlen(prefix) : 0; | |
146 | opt->pattern_tail = &opt->pattern_list; | |
147 | opt->header_tail = &opt->header_list; | |
148 | ||
149 | opt->color = def->color; | |
150 | opt->extended_regexp_option = def->extended_regexp_option; | |
151 | opt->pattern_type_option = def->pattern_type_option; | |
152 | opt->linenum = def->linenum; | |
153 | opt->max_depth = def->max_depth; | |
154 | opt->pathname = def->pathname; | |
7687a054 | 155 | opt->relative = def->relative; |
379642bc | 156 | opt->output = def->output; |
7687a054 | 157 | |
7ce4fb94 JK |
158 | color_set(opt->color_context, def->color_context); |
159 | color_set(opt->color_filename, def->color_filename); | |
160 | color_set(opt->color_function, def->color_function); | |
161 | color_set(opt->color_lineno, def->color_lineno); | |
162 | color_set(opt->color_match_context, def->color_match_context); | |
163 | color_set(opt->color_match_selected, def->color_match_selected); | |
164 | color_set(opt->color_selected, def->color_selected); | |
165 | color_set(opt->color_sep, def->color_sep); | |
7687a054 | 166 | } |
07a7d656 | 167 | |
8465541e | 168 | static void grep_set_pattern_type_option(enum grep_pattern_type pattern_type, struct grep_opt *opt) |
c5c31d33 | 169 | { |
07a3d411 ÆAB |
170 | /* |
171 | * When committing to the pattern type by setting the relevant | |
172 | * fields in grep_opt it's generally not necessary to zero out | |
173 | * the fields we're not choosing, since they won't have been | |
174 | * set by anything. The extended_regexp_option field is the | |
175 | * only exception to this. | |
176 | * | |
177 | * This is because in the process of parsing grep.patternType | |
178 | * & grep.extendedRegexp we set opt->pattern_type_option and | |
179 | * opt->extended_regexp_option, respectively. We then | |
180 | * internally use opt->extended_regexp_option to see if we're | |
181 | * compiling an ERE. It must be unset if that's not actually | |
182 | * the case. | |
183 | */ | |
184 | if (pattern_type != GREP_PATTERN_TYPE_ERE && | |
185 | opt->extended_regexp_option) | |
186 | opt->extended_regexp_option = 0; | |
187 | ||
c5c31d33 JH |
188 | switch (pattern_type) { |
189 | case GREP_PATTERN_TYPE_UNSPECIFIED: | |
190 | /* fall through */ | |
191 | ||
192 | case GREP_PATTERN_TYPE_BRE: | |
c5c31d33 JH |
193 | break; |
194 | ||
195 | case GREP_PATTERN_TYPE_ERE: | |
07a3d411 | 196 | opt->extended_regexp_option = 1; |
c5c31d33 JH |
197 | break; |
198 | ||
199 | case GREP_PATTERN_TYPE_FIXED: | |
200 | opt->fixed = 1; | |
c5c31d33 JH |
201 | break; |
202 | ||
203 | case GREP_PATTERN_TYPE_PCRE: | |
94da9193 | 204 | #ifdef USE_LIBPCRE2 |
94da9193 ÆAB |
205 | opt->pcre2 = 1; |
206 | #else | |
207 | /* | |
208 | * It's important that pcre1 always be assigned to | |
209 | * even when there's no USE_LIBPCRE* defined. We still | |
210 | * call the PCRE stub function, it just dies with | |
211 | * "cannot use Perl-compatible regexes[...]". | |
212 | */ | |
6d4b5747 | 213 | opt->pcre1 = 1; |
94da9193 | 214 | #endif |
c5c31d33 JH |
215 | break; |
216 | } | |
217 | } | |
218 | ||
8465541e JH |
219 | void grep_commit_pattern_type(enum grep_pattern_type pattern_type, struct grep_opt *opt) |
220 | { | |
221 | if (pattern_type != GREP_PATTERN_TYPE_UNSPECIFIED) | |
222 | grep_set_pattern_type_option(pattern_type, opt); | |
223 | else if (opt->pattern_type_option != GREP_PATTERN_TYPE_UNSPECIFIED) | |
224 | grep_set_pattern_type_option(opt->pattern_type_option, opt); | |
225 | else if (opt->extended_regexp_option) | |
07a3d411 ÆAB |
226 | /* |
227 | * This branch *must* happen after setting from the | |
228 | * opt->pattern_type_option above, we don't want | |
229 | * grep.extendedRegexp to override grep.patternType! | |
230 | */ | |
8465541e JH |
231 | grep_set_pattern_type_option(GREP_PATTERN_TYPE_ERE, opt); |
232 | } | |
233 | ||
fc456751 RS |
234 | static struct grep_pat *create_grep_pat(const char *pat, size_t patlen, |
235 | const char *origin, int no, | |
236 | enum grep_pat_token t, | |
237 | enum grep_header_field field) | |
a4d7d2c6 JH |
238 | { |
239 | struct grep_pat *p = xcalloc(1, sizeof(*p)); | |
526a858a | 240 | p->pattern = xmemdupz(pat, patlen); |
fc456751 RS |
241 | p->patternlen = patlen; |
242 | p->origin = origin; | |
243 | p->no = no; | |
244 | p->token = t; | |
a4d7d2c6 | 245 | p->field = field; |
fc456751 RS |
246 | return p; |
247 | } | |
248 | ||
2b3873ff RS |
249 | static void do_append_grep_pat(struct grep_pat ***tail, struct grep_pat *p) |
250 | { | |
251 | **tail = p; | |
252 | *tail = &p->next; | |
a4d7d2c6 | 253 | p->next = NULL; |
526a858a RS |
254 | |
255 | switch (p->token) { | |
256 | case GREP_PATTERN: /* atom */ | |
257 | case GREP_PATTERN_HEAD: | |
258 | case GREP_PATTERN_BODY: | |
259 | for (;;) { | |
260 | struct grep_pat *new_pat; | |
261 | size_t len = 0; | |
262 | char *cp = p->pattern + p->patternlen, *nl = NULL; | |
263 | while (++len <= p->patternlen) { | |
264 | if (*(--cp) == '\n') { | |
265 | nl = cp; | |
266 | break; | |
267 | } | |
268 | } | |
269 | if (!nl) | |
270 | break; | |
271 | new_pat = create_grep_pat(nl + 1, len - 1, p->origin, | |
272 | p->no, p->token, p->field); | |
273 | new_pat->next = p->next; | |
274 | if (!p->next) | |
275 | *tail = &new_pat->next; | |
276 | p->next = new_pat; | |
277 | *nl = '\0'; | |
278 | p->patternlen -= len; | |
279 | } | |
280 | break; | |
281 | default: | |
282 | break; | |
283 | } | |
2b3873ff RS |
284 | } |
285 | ||
fc456751 RS |
286 | void append_header_grep_pattern(struct grep_opt *opt, |
287 | enum grep_header_field field, const char *pat) | |
288 | { | |
289 | struct grep_pat *p = create_grep_pat(pat, strlen(pat), "header", 0, | |
290 | GREP_PATTERN_HEAD, field); | |
baa6378f JH |
291 | if (field == GREP_HEADER_REFLOG) |
292 | opt->use_reflog_filter = 1; | |
2b3873ff | 293 | do_append_grep_pat(&opt->header_tail, p); |
a4d7d2c6 JH |
294 | } |
295 | ||
83b5d2f5 JH |
296 | void append_grep_pattern(struct grep_opt *opt, const char *pat, |
297 | const char *origin, int no, enum grep_pat_token t) | |
ed40a095 RS |
298 | { |
299 | append_grep_pat(opt, pat, strlen(pat), origin, no, t); | |
300 | } | |
301 | ||
302 | void append_grep_pat(struct grep_opt *opt, const char *pat, size_t patlen, | |
303 | const char *origin, int no, enum grep_pat_token t) | |
83b5d2f5 | 304 | { |
fc456751 | 305 | struct grep_pat *p = create_grep_pat(pat, patlen, origin, no, t, 0); |
2b3873ff | 306 | do_append_grep_pat(&opt->pattern_tail, p); |
83b5d2f5 JH |
307 | } |
308 | ||
5b594f45 FK |
309 | struct grep_opt *grep_opt_dup(const struct grep_opt *opt) |
310 | { | |
311 | struct grep_pat *pat; | |
312 | struct grep_opt *ret = xmalloc(sizeof(struct grep_opt)); | |
313 | *ret = *opt; | |
314 | ||
315 | ret->pattern_list = NULL; | |
316 | ret->pattern_tail = &ret->pattern_list; | |
317 | ||
318 | for(pat = opt->pattern_list; pat != NULL; pat = pat->next) | |
319 | { | |
320 | if(pat->token == GREP_PATTERN_HEAD) | |
321 | append_header_grep_pattern(ret, pat->field, | |
322 | pat->pattern); | |
323 | else | |
ed40a095 RS |
324 | append_grep_pat(ret, pat->pattern, pat->patternlen, |
325 | pat->origin, pat->no, pat->token); | |
5b594f45 FK |
326 | } |
327 | ||
328 | return ret; | |
329 | } | |
330 | ||
a30c148a MK |
331 | static NORETURN void compile_regexp_failed(const struct grep_pat *p, |
332 | const char *error) | |
333 | { | |
334 | char where[1024]; | |
335 | ||
336 | if (p->no) | |
19bdd3e7 | 337 | xsnprintf(where, sizeof(where), "In '%s' at %d, ", p->origin, p->no); |
a30c148a | 338 | else if (p->origin) |
19bdd3e7 | 339 | xsnprintf(where, sizeof(where), "%s, ", p->origin); |
a30c148a MK |
340 | else |
341 | where[0] = 0; | |
342 | ||
343 | die("%s'%s': %s", where, p->pattern, error); | |
344 | } | |
345 | ||
543f1c0c ÆAB |
346 | static int is_fixed(const char *s, size_t len) |
347 | { | |
348 | size_t i; | |
349 | ||
350 | for (i = 0; i < len; i++) { | |
351 | if (is_regex_special(s[i])) | |
352 | return 0; | |
353 | } | |
354 | ||
355 | return 1; | |
356 | } | |
357 | ||
219e65b6 ÆAB |
358 | static int has_null(const char *s, size_t len) |
359 | { | |
360 | /* | |
361 | * regcomp cannot accept patterns with NULs so when using it | |
362 | * we consider any pattern containing a NUL fixed. | |
363 | */ | |
364 | if (memchr(s, 0, len)) | |
365 | return 1; | |
366 | ||
367 | return 0; | |
368 | } | |
369 | ||
3485bea1 | 370 | #ifdef USE_LIBPCRE1 |
6d4b5747 | 371 | static void compile_pcre1_regexp(struct grep_pat *p, const struct grep_opt *opt) |
63e7e9d8 MK |
372 | { |
373 | const char *error; | |
374 | int erroffset; | |
fba4f125 | 375 | int options = PCRE_MULTILINE; |
63e7e9d8 | 376 | |
9d9babb8 NTND |
377 | if (opt->ignore_case) { |
378 | if (has_non_ascii(p->pattern)) | |
6d4b5747 | 379 | p->pcre1_tables = pcre_maketables(); |
63e7e9d8 | 380 | options |= PCRE_CASELESS; |
9d9babb8 | 381 | } |
18547aac NTND |
382 | if (is_utf8_locale() && has_non_ascii(p->pattern)) |
383 | options |= PCRE_UTF8; | |
63e7e9d8 | 384 | |
6d4b5747 ÆAB |
385 | p->pcre1_regexp = pcre_compile(p->pattern, options, &error, &erroffset, |
386 | p->pcre1_tables); | |
387 | if (!p->pcre1_regexp) | |
63e7e9d8 MK |
388 | compile_regexp_failed(p, error); |
389 | ||
fbaceaac | 390 | p->pcre1_extra_info = pcre_study(p->pcre1_regexp, PCRE_STUDY_JIT_COMPILE, &error); |
6d4b5747 | 391 | if (!p->pcre1_extra_info && error) |
63e7e9d8 | 392 | die("%s", error); |
fbaceaac | 393 | |
e87de7ca | 394 | #ifdef GIT_PCRE1_USE_JIT |
fbaceaac ÆAB |
395 | pcre_config(PCRE_CONFIG_JIT, &p->pcre1_jit_on); |
396 | if (p->pcre1_jit_on == 1) { | |
397 | p->pcre1_jit_stack = pcre_jit_stack_alloc(1, 1024 * 1024); | |
398 | if (!p->pcre1_jit_stack) | |
399 | die("Couldn't allocate PCRE JIT stack"); | |
400 | pcre_assign_jit_stack(p->pcre1_extra_info, NULL, p->pcre1_jit_stack); | |
401 | } else if (p->pcre1_jit_on != 0) { | |
402 | die("BUG: The pcre1_jit_on variable should be 0 or 1, not %d", | |
403 | p->pcre1_jit_on); | |
404 | } | |
405 | #endif | |
63e7e9d8 MK |
406 | } |
407 | ||
6d4b5747 | 408 | static int pcre1match(struct grep_pat *p, const char *line, const char *eol, |
63e7e9d8 MK |
409 | regmatch_t *match, int eflags) |
410 | { | |
411 | int ovector[30], ret, flags = 0; | |
412 | ||
413 | if (eflags & REG_NOTBOL) | |
414 | flags |= PCRE_NOTBOL; | |
415 | ||
e87de7ca | 416 | #ifdef GIT_PCRE1_USE_JIT |
fbaceaac ÆAB |
417 | if (p->pcre1_jit_on) { |
418 | ret = pcre_jit_exec(p->pcre1_regexp, p->pcre1_extra_info, line, | |
419 | eol - line, 0, flags, ovector, | |
420 | ARRAY_SIZE(ovector), p->pcre1_jit_stack); | |
421 | } else | |
422 | #endif | |
423 | { | |
424 | ret = pcre_exec(p->pcre1_regexp, p->pcre1_extra_info, line, | |
425 | eol - line, 0, flags, ovector, | |
426 | ARRAY_SIZE(ovector)); | |
427 | } | |
428 | ||
63e7e9d8 MK |
429 | if (ret < 0 && ret != PCRE_ERROR_NOMATCH) |
430 | die("pcre_exec failed with error code %d", ret); | |
431 | if (ret > 0) { | |
432 | ret = 0; | |
433 | match->rm_so = ovector[0]; | |
434 | match->rm_eo = ovector[1]; | |
435 | } | |
436 | ||
437 | return ret; | |
438 | } | |
439 | ||
6d4b5747 | 440 | static void free_pcre1_regexp(struct grep_pat *p) |
63e7e9d8 | 441 | { |
6d4b5747 | 442 | pcre_free(p->pcre1_regexp); |
e87de7ca | 443 | #ifdef GIT_PCRE1_USE_JIT |
fbaceaac ÆAB |
444 | if (p->pcre1_jit_on) { |
445 | pcre_free_study(p->pcre1_extra_info); | |
446 | pcre_jit_stack_free(p->pcre1_jit_stack); | |
447 | } else | |
448 | #endif | |
449 | { | |
450 | pcre_free(p->pcre1_extra_info); | |
451 | } | |
6d4b5747 | 452 | pcre_free((void *)p->pcre1_tables); |
63e7e9d8 | 453 | } |
3485bea1 | 454 | #else /* !USE_LIBPCRE1 */ |
6d4b5747 | 455 | static void compile_pcre1_regexp(struct grep_pat *p, const struct grep_opt *opt) |
63e7e9d8 MK |
456 | { |
457 | die("cannot use Perl-compatible regexes when not compiled with USE_LIBPCRE"); | |
458 | } | |
459 | ||
6d4b5747 | 460 | static int pcre1match(struct grep_pat *p, const char *line, const char *eol, |
63e7e9d8 MK |
461 | regmatch_t *match, int eflags) |
462 | { | |
463 | return 1; | |
464 | } | |
465 | ||
6d4b5747 | 466 | static void free_pcre1_regexp(struct grep_pat *p) |
63e7e9d8 MK |
467 | { |
468 | } | |
3485bea1 | 469 | #endif /* !USE_LIBPCRE1 */ |
63e7e9d8 | 470 | |
94da9193 ÆAB |
471 | #ifdef USE_LIBPCRE2 |
472 | static void compile_pcre2_pattern(struct grep_pat *p, const struct grep_opt *opt) | |
473 | { | |
474 | int error; | |
475 | PCRE2_UCHAR errbuf[256]; | |
476 | PCRE2_SIZE erroffset; | |
477 | int options = PCRE2_MULTILINE; | |
478 | const uint8_t *character_tables = NULL; | |
479 | int jitret; | |
480 | ||
481 | assert(opt->pcre2); | |
482 | ||
483 | p->pcre2_compile_context = NULL; | |
484 | ||
485 | if (opt->ignore_case) { | |
486 | if (has_non_ascii(p->pattern)) { | |
487 | character_tables = pcre2_maketables(NULL); | |
488 | p->pcre2_compile_context = pcre2_compile_context_create(NULL); | |
489 | pcre2_set_character_tables(p->pcre2_compile_context, character_tables); | |
490 | } | |
491 | options |= PCRE2_CASELESS; | |
492 | } | |
493 | if (is_utf8_locale() && has_non_ascii(p->pattern)) | |
494 | options |= PCRE2_UTF; | |
495 | ||
496 | p->pcre2_pattern = pcre2_compile((PCRE2_SPTR)p->pattern, | |
497 | p->patternlen, options, &error, &erroffset, | |
498 | p->pcre2_compile_context); | |
499 | ||
500 | if (p->pcre2_pattern) { | |
501 | p->pcre2_match_data = pcre2_match_data_create_from_pattern(p->pcre2_pattern, NULL); | |
502 | if (!p->pcre2_match_data) | |
503 | die("Couldn't allocate PCRE2 match data"); | |
504 | } else { | |
505 | pcre2_get_error_message(error, errbuf, sizeof(errbuf)); | |
506 | compile_regexp_failed(p, (const char *)&errbuf); | |
507 | } | |
508 | ||
509 | pcre2_config(PCRE2_CONFIG_JIT, &p->pcre2_jit_on); | |
510 | if (p->pcre2_jit_on == 1) { | |
511 | jitret = pcre2_jit_compile(p->pcre2_pattern, PCRE2_JIT_COMPLETE); | |
512 | if (jitret) | |
513 | die("Couldn't JIT the PCRE2 pattern '%s', got '%d'\n", p->pattern, jitret); | |
514 | p->pcre2_jit_stack = pcre2_jit_stack_create(1, 1024 * 1024, NULL); | |
515 | if (!p->pcre2_jit_stack) | |
516 | die("Couldn't allocate PCRE2 JIT stack"); | |
517 | p->pcre2_match_context = pcre2_match_context_create(NULL); | |
674ad936 | 518 | if (!p->pcre2_match_context) |
94da9193 ÆAB |
519 | die("Couldn't allocate PCRE2 match context"); |
520 | pcre2_jit_stack_assign(p->pcre2_match_context, NULL, p->pcre2_jit_stack); | |
521 | } else if (p->pcre2_jit_on != 0) { | |
522 | die("BUG: The pcre2_jit_on variable should be 0 or 1, not %d", | |
523 | p->pcre1_jit_on); | |
524 | } | |
525 | } | |
526 | ||
527 | static int pcre2match(struct grep_pat *p, const char *line, const char *eol, | |
528 | regmatch_t *match, int eflags) | |
529 | { | |
530 | int ret, flags = 0; | |
531 | PCRE2_SIZE *ovector; | |
532 | PCRE2_UCHAR errbuf[256]; | |
533 | ||
534 | if (eflags & REG_NOTBOL) | |
535 | flags |= PCRE2_NOTBOL; | |
536 | ||
537 | if (p->pcre2_jit_on) | |
538 | ret = pcre2_jit_match(p->pcre2_pattern, (unsigned char *)line, | |
539 | eol - line, 0, flags, p->pcre2_match_data, | |
540 | NULL); | |
541 | else | |
542 | ret = pcre2_match(p->pcre2_pattern, (unsigned char *)line, | |
543 | eol - line, 0, flags, p->pcre2_match_data, | |
544 | NULL); | |
545 | ||
546 | if (ret < 0 && ret != PCRE2_ERROR_NOMATCH) { | |
547 | pcre2_get_error_message(ret, errbuf, sizeof(errbuf)); | |
548 | die("%s failed with error code %d: %s", | |
549 | (p->pcre2_jit_on ? "pcre2_jit_match" : "pcre2_match"), ret, | |
550 | errbuf); | |
551 | } | |
552 | if (ret > 0) { | |
553 | ovector = pcre2_get_ovector_pointer(p->pcre2_match_data); | |
554 | ret = 0; | |
555 | match->rm_so = (int)ovector[0]; | |
556 | match->rm_eo = (int)ovector[1]; | |
557 | } | |
558 | ||
559 | return ret; | |
560 | } | |
561 | ||
562 | static void free_pcre2_pattern(struct grep_pat *p) | |
563 | { | |
564 | pcre2_compile_context_free(p->pcre2_compile_context); | |
565 | pcre2_code_free(p->pcre2_pattern); | |
566 | pcre2_match_data_free(p->pcre2_match_data); | |
567 | pcre2_jit_stack_free(p->pcre2_jit_stack); | |
568 | pcre2_match_context_free(p->pcre2_match_context); | |
569 | } | |
570 | #else /* !USE_LIBPCRE2 */ | |
571 | static void compile_pcre2_pattern(struct grep_pat *p, const struct grep_opt *opt) | |
572 | { | |
573 | /* | |
574 | * Unreachable until USE_LIBPCRE2 becomes synonymous with | |
575 | * USE_LIBPCRE. See the sibling comment in | |
576 | * grep_set_pattern_type_option(). | |
577 | */ | |
578 | die("cannot use Perl-compatible regexes when not compiled with USE_LIBPCRE"); | |
579 | } | |
580 | ||
581 | static int pcre2match(struct grep_pat *p, const char *line, const char *eol, | |
582 | regmatch_t *match, int eflags) | |
583 | { | |
584 | return 1; | |
585 | } | |
586 | ||
587 | static void free_pcre2_pattern(struct grep_pat *p) | |
588 | { | |
589 | } | |
590 | #endif /* !USE_LIBPCRE2 */ | |
591 | ||
793dc676 NTND |
592 | static void compile_fixed_regexp(struct grep_pat *p, struct grep_opt *opt) |
593 | { | |
594 | struct strbuf sb = STRBUF_INIT; | |
595 | int err; | |
1ceababc | 596 | int regflags = 0; |
793dc676 NTND |
597 | |
598 | basic_regex_quote_buf(&sb, p->pattern); | |
793dc676 NTND |
599 | if (opt->ignore_case) |
600 | regflags |= REG_ICASE; | |
601 | err = regcomp(&p->regexp, sb.buf, regflags); | |
602 | if (opt->debug) | |
603 | fprintf(stderr, "fixed %s\n", sb.buf); | |
604 | strbuf_release(&sb); | |
605 | if (err) { | |
606 | char errbuf[1024]; | |
607 | regerror(err, &p->regexp, errbuf, sizeof(errbuf)); | |
608 | regfree(&p->regexp); | |
609 | compile_regexp_failed(p, errbuf); | |
610 | } | |
611 | } | |
612 | ||
83b5d2f5 JH |
613 | static void compile_regexp(struct grep_pat *p, struct grep_opt *opt) |
614 | { | |
07a3d411 | 615 | int ascii_only; |
c822255c | 616 | int err; |
07a3d411 | 617 | int regflags = REG_NEWLINE; |
c822255c | 618 | |
d7eb527d | 619 | p->word_regexp = opt->word_regexp; |
5183bf67 | 620 | p->ignore_case = opt->ignore_case; |
5c1ebcca | 621 | ascii_only = !has_non_ascii(p->pattern); |
d7eb527d | 622 | |
793dc676 NTND |
623 | /* |
624 | * Even when -F (fixed) asks us to do a non-regexp search, we | |
625 | * may not be able to correctly case-fold when -i | |
626 | * (ignore-case) is asked (in which case, we'll synthesize a | |
627 | * regexp to match the pattern that matches regexp special | |
628 | * characters literally, while ignoring case differences). On | |
629 | * the other hand, even without -F, if the pattern does not | |
630 | * have any regexp special characters and there is no need for | |
631 | * case-folding search, we can internally turn it into a | |
632 | * simple string match using kws. p->fixed tells us if we | |
633 | * want to use kws. | |
634 | */ | |
219e65b6 ÆAB |
635 | if (opt->fixed || |
636 | has_null(p->pattern, p->patternlen) || | |
637 | is_fixed(p->pattern, p->patternlen)) | |
07a3d411 | 638 | p->fixed = !p->ignore_case || ascii_only; |
9eceddee FK |
639 | |
640 | if (p->fixed) { | |
07a3d411 | 641 | p->kws = kwsalloc(p->ignore_case ? tolower_trans_tbl : NULL); |
9eceddee FK |
642 | kwsincr(p->kws, p->pattern, p->patternlen); |
643 | kwsprep(p->kws); | |
c822255c | 644 | return; |
793dc676 NTND |
645 | } else if (opt->fixed) { |
646 | /* | |
647 | * We come here when the pattern has the non-ascii | |
648 | * characters we cannot case-fold, and asked to | |
649 | * ignore-case. | |
650 | */ | |
651 | compile_fixed_regexp(p, opt); | |
652 | return; | |
9eceddee | 653 | } |
c822255c | 654 | |
94da9193 ÆAB |
655 | if (opt->pcre2) { |
656 | compile_pcre2_pattern(p, opt); | |
657 | return; | |
658 | } | |
659 | ||
6d4b5747 ÆAB |
660 | if (opt->pcre1) { |
661 | compile_pcre1_regexp(p, opt); | |
63e7e9d8 MK |
662 | return; |
663 | } | |
664 | ||
07a3d411 ÆAB |
665 | if (p->ignore_case) |
666 | regflags |= REG_ICASE; | |
667 | if (opt->extended_regexp_option) | |
668 | regflags |= REG_EXTENDED; | |
669 | err = regcomp(&p->regexp, p->pattern, regflags); | |
83b5d2f5 JH |
670 | if (err) { |
671 | char errbuf[1024]; | |
83b5d2f5 JH |
672 | regerror(err, &p->regexp, errbuf, 1024); |
673 | regfree(&p->regexp); | |
a30c148a | 674 | compile_regexp_failed(p, errbuf); |
83b5d2f5 JH |
675 | } |
676 | } | |
677 | ||
0ab7befa | 678 | static struct grep_expr *compile_pattern_or(struct grep_pat **); |
83b5d2f5 JH |
679 | static struct grep_expr *compile_pattern_atom(struct grep_pat **list) |
680 | { | |
681 | struct grep_pat *p; | |
682 | struct grep_expr *x; | |
683 | ||
684 | p = *list; | |
c922b01f LT |
685 | if (!p) |
686 | return NULL; | |
83b5d2f5 JH |
687 | switch (p->token) { |
688 | case GREP_PATTERN: /* atom */ | |
480c1ca6 JH |
689 | case GREP_PATTERN_HEAD: |
690 | case GREP_PATTERN_BODY: | |
83b5d2f5 JH |
691 | x = xcalloc(1, sizeof (struct grep_expr)); |
692 | x->node = GREP_NODE_ATOM; | |
693 | x->u.atom = p; | |
694 | *list = p->next; | |
695 | return x; | |
696 | case GREP_OPEN_PAREN: | |
697 | *list = p->next; | |
0ab7befa | 698 | x = compile_pattern_or(list); |
83b5d2f5 JH |
699 | if (!*list || (*list)->token != GREP_CLOSE_PAREN) |
700 | die("unmatched parenthesis"); | |
701 | *list = (*list)->next; | |
702 | return x; | |
703 | default: | |
704 | return NULL; | |
705 | } | |
706 | } | |
707 | ||
708 | static struct grep_expr *compile_pattern_not(struct grep_pat **list) | |
709 | { | |
710 | struct grep_pat *p; | |
711 | struct grep_expr *x; | |
712 | ||
713 | p = *list; | |
c922b01f LT |
714 | if (!p) |
715 | return NULL; | |
83b5d2f5 JH |
716 | switch (p->token) { |
717 | case GREP_NOT: | |
718 | if (!p->next) | |
719 | die("--not not followed by pattern expression"); | |
720 | *list = p->next; | |
721 | x = xcalloc(1, sizeof (struct grep_expr)); | |
722 | x->node = GREP_NODE_NOT; | |
723 | x->u.unary = compile_pattern_not(list); | |
724 | if (!x->u.unary) | |
725 | die("--not followed by non pattern expression"); | |
726 | return x; | |
727 | default: | |
728 | return compile_pattern_atom(list); | |
729 | } | |
730 | } | |
731 | ||
732 | static struct grep_expr *compile_pattern_and(struct grep_pat **list) | |
733 | { | |
734 | struct grep_pat *p; | |
735 | struct grep_expr *x, *y, *z; | |
736 | ||
737 | x = compile_pattern_not(list); | |
738 | p = *list; | |
739 | if (p && p->token == GREP_AND) { | |
740 | if (!p->next) | |
741 | die("--and not followed by pattern expression"); | |
742 | *list = p->next; | |
743 | y = compile_pattern_and(list); | |
744 | if (!y) | |
745 | die("--and not followed by pattern expression"); | |
746 | z = xcalloc(1, sizeof (struct grep_expr)); | |
747 | z->node = GREP_NODE_AND; | |
748 | z->u.binary.left = x; | |
749 | z->u.binary.right = y; | |
750 | return z; | |
751 | } | |
752 | return x; | |
753 | } | |
754 | ||
755 | static struct grep_expr *compile_pattern_or(struct grep_pat **list) | |
756 | { | |
757 | struct grep_pat *p; | |
758 | struct grep_expr *x, *y, *z; | |
759 | ||
760 | x = compile_pattern_and(list); | |
761 | p = *list; | |
762 | if (x && p && p->token != GREP_CLOSE_PAREN) { | |
763 | y = compile_pattern_or(list); | |
764 | if (!y) | |
765 | die("not a pattern expression %s", p->pattern); | |
766 | z = xcalloc(1, sizeof (struct grep_expr)); | |
767 | z->node = GREP_NODE_OR; | |
768 | z->u.binary.left = x; | |
769 | z->u.binary.right = y; | |
770 | return z; | |
771 | } | |
772 | return x; | |
773 | } | |
774 | ||
775 | static struct grep_expr *compile_pattern_expr(struct grep_pat **list) | |
776 | { | |
777 | return compile_pattern_or(list); | |
778 | } | |
779 | ||
17bf35a3 JH |
780 | static void indent(int in) |
781 | { | |
782 | while (in-- > 0) | |
783 | fputc(' ', stderr); | |
784 | } | |
785 | ||
786 | static void dump_grep_pat(struct grep_pat *p) | |
787 | { | |
788 | switch (p->token) { | |
789 | case GREP_AND: fprintf(stderr, "*and*"); break; | |
790 | case GREP_OPEN_PAREN: fprintf(stderr, "*(*"); break; | |
791 | case GREP_CLOSE_PAREN: fprintf(stderr, "*)*"); break; | |
792 | case GREP_NOT: fprintf(stderr, "*not*"); break; | |
793 | case GREP_OR: fprintf(stderr, "*or*"); break; | |
794 | ||
795 | case GREP_PATTERN: fprintf(stderr, "pattern"); break; | |
796 | case GREP_PATTERN_HEAD: fprintf(stderr, "pattern_head"); break; | |
797 | case GREP_PATTERN_BODY: fprintf(stderr, "pattern_body"); break; | |
798 | } | |
799 | ||
800 | switch (p->token) { | |
801 | default: break; | |
802 | case GREP_PATTERN_HEAD: | |
803 | fprintf(stderr, "<head %d>", p->field); break; | |
804 | case GREP_PATTERN_BODY: | |
805 | fprintf(stderr, "<body>"); break; | |
806 | } | |
807 | switch (p->token) { | |
808 | default: break; | |
809 | case GREP_PATTERN_HEAD: | |
810 | case GREP_PATTERN_BODY: | |
811 | case GREP_PATTERN: | |
812 | fprintf(stderr, "%.*s", (int)p->patternlen, p->pattern); | |
813 | break; | |
814 | } | |
815 | fputc('\n', stderr); | |
816 | } | |
817 | ||
818 | static void dump_grep_expression_1(struct grep_expr *x, int in) | |
819 | { | |
820 | indent(in); | |
821 | switch (x->node) { | |
822 | case GREP_NODE_TRUE: | |
823 | fprintf(stderr, "true\n"); | |
824 | break; | |
825 | case GREP_NODE_ATOM: | |
826 | dump_grep_pat(x->u.atom); | |
827 | break; | |
828 | case GREP_NODE_NOT: | |
829 | fprintf(stderr, "(not\n"); | |
830 | dump_grep_expression_1(x->u.unary, in+1); | |
831 | indent(in); | |
832 | fprintf(stderr, ")\n"); | |
833 | break; | |
834 | case GREP_NODE_AND: | |
835 | fprintf(stderr, "(and\n"); | |
836 | dump_grep_expression_1(x->u.binary.left, in+1); | |
837 | dump_grep_expression_1(x->u.binary.right, in+1); | |
838 | indent(in); | |
839 | fprintf(stderr, ")\n"); | |
840 | break; | |
841 | case GREP_NODE_OR: | |
842 | fprintf(stderr, "(or\n"); | |
843 | dump_grep_expression_1(x->u.binary.left, in+1); | |
844 | dump_grep_expression_1(x->u.binary.right, in+1); | |
845 | indent(in); | |
846 | fprintf(stderr, ")\n"); | |
847 | break; | |
848 | } | |
849 | } | |
850 | ||
07a7d656 | 851 | static void dump_grep_expression(struct grep_opt *opt) |
17bf35a3 JH |
852 | { |
853 | struct grep_expr *x = opt->pattern_expression; | |
854 | ||
855 | if (opt->all_match) | |
856 | fprintf(stderr, "[all-match]\n"); | |
857 | dump_grep_expression_1(x, 0); | |
858 | fflush(NULL); | |
859 | } | |
860 | ||
5aaeb733 JH |
861 | static struct grep_expr *grep_true_expr(void) |
862 | { | |
863 | struct grep_expr *z = xcalloc(1, sizeof(*z)); | |
864 | z->node = GREP_NODE_TRUE; | |
865 | return z; | |
866 | } | |
867 | ||
868 | static struct grep_expr *grep_or_expr(struct grep_expr *left, struct grep_expr *right) | |
869 | { | |
870 | struct grep_expr *z = xcalloc(1, sizeof(*z)); | |
871 | z->node = GREP_NODE_OR; | |
872 | z->u.binary.left = left; | |
873 | z->u.binary.right = right; | |
874 | return z; | |
875 | } | |
876 | ||
95ce9ce2 | 877 | static struct grep_expr *prep_header_patterns(struct grep_opt *opt) |
83b5d2f5 JH |
878 | { |
879 | struct grep_pat *p; | |
95ce9ce2 | 880 | struct grep_expr *header_expr; |
5aaeb733 JH |
881 | struct grep_expr *(header_group[GREP_HEADER_FIELD_MAX]); |
882 | enum grep_header_field fld; | |
83b5d2f5 | 883 | |
95ce9ce2 JH |
884 | if (!opt->header_list) |
885 | return NULL; | |
2385f246 | 886 | |
95ce9ce2 JH |
887 | for (p = opt->header_list; p; p = p->next) { |
888 | if (p->token != GREP_PATTERN_HEAD) | |
ef1177d1 | 889 | die("BUG: a non-header pattern in grep header list."); |
3ce3ffb8 AP |
890 | if (p->field < GREP_HEADER_FIELD_MIN || |
891 | GREP_HEADER_FIELD_MAX <= p->field) | |
ef1177d1 | 892 | die("BUG: unknown header field %d", p->field); |
95ce9ce2 | 893 | compile_regexp(p, opt); |
80235ba7 | 894 | } |
5aaeb733 JH |
895 | |
896 | for (fld = 0; fld < GREP_HEADER_FIELD_MAX; fld++) | |
897 | header_group[fld] = NULL; | |
898 | ||
899 | for (p = opt->header_list; p; p = p->next) { | |
900 | struct grep_expr *h; | |
901 | struct grep_pat *pp = p; | |
902 | ||
903 | h = compile_pattern_atom(&pp); | |
904 | if (!h || pp != p->next) | |
ef1177d1 | 905 | die("BUG: malformed header expr"); |
5aaeb733 JH |
906 | if (!header_group[p->field]) { |
907 | header_group[p->field] = h; | |
908 | continue; | |
909 | } | |
910 | header_group[p->field] = grep_or_expr(h, header_group[p->field]); | |
911 | } | |
912 | ||
913 | header_expr = NULL; | |
914 | ||
915 | for (fld = 0; fld < GREP_HEADER_FIELD_MAX; fld++) { | |
916 | if (!header_group[fld]) | |
917 | continue; | |
918 | if (!header_expr) | |
919 | header_expr = grep_true_expr(); | |
920 | header_expr = grep_or_expr(header_group[fld], header_expr); | |
921 | } | |
95ce9ce2 JH |
922 | return header_expr; |
923 | } | |
924 | ||
13e4fc7e JH |
925 | static struct grep_expr *grep_splice_or(struct grep_expr *x, struct grep_expr *y) |
926 | { | |
927 | struct grep_expr *z = x; | |
928 | ||
929 | while (x) { | |
930 | assert(x->node == GREP_NODE_OR); | |
931 | if (x->u.binary.right && | |
932 | x->u.binary.right->node == GREP_NODE_TRUE) { | |
933 | x->u.binary.right = y; | |
934 | break; | |
935 | } | |
936 | x = x->u.binary.right; | |
937 | } | |
938 | return z; | |
939 | } | |
940 | ||
17bf35a3 | 941 | static void compile_grep_patterns_real(struct grep_opt *opt) |
95ce9ce2 JH |
942 | { |
943 | struct grep_pat *p; | |
944 | struct grep_expr *header_expr = prep_header_patterns(opt); | |
0ab7befa | 945 | |
83b5d2f5 | 946 | for (p = opt->pattern_list; p; p = p->next) { |
480c1ca6 JH |
947 | switch (p->token) { |
948 | case GREP_PATTERN: /* atom */ | |
949 | case GREP_PATTERN_HEAD: | |
950 | case GREP_PATTERN_BODY: | |
c822255c | 951 | compile_regexp(p, opt); |
480c1ca6 JH |
952 | break; |
953 | default: | |
83b5d2f5 | 954 | opt->extended = 1; |
480c1ca6 JH |
955 | break; |
956 | } | |
83b5d2f5 JH |
957 | } |
958 | ||
80235ba7 JH |
959 | if (opt->all_match || header_expr) |
960 | opt->extended = 1; | |
17bf35a3 | 961 | else if (!opt->extended && !opt->debug) |
83b5d2f5 JH |
962 | return; |
963 | ||
83b5d2f5 | 964 | p = opt->pattern_list; |
ba150a3f MB |
965 | if (p) |
966 | opt->pattern_expression = compile_pattern_expr(&p); | |
83b5d2f5 JH |
967 | if (p) |
968 | die("incomplete pattern expression: %s", p->pattern); | |
80235ba7 JH |
969 | |
970 | if (!header_expr) | |
971 | return; | |
972 | ||
5aaeb733 | 973 | if (!opt->pattern_expression) |
80235ba7 | 974 | opt->pattern_expression = header_expr; |
13e4fc7e JH |
975 | else if (opt->all_match) |
976 | opt->pattern_expression = grep_splice_or(header_expr, | |
977 | opt->pattern_expression); | |
5aaeb733 JH |
978 | else |
979 | opt->pattern_expression = grep_or_expr(opt->pattern_expression, | |
980 | header_expr); | |
80235ba7 | 981 | opt->all_match = 1; |
83b5d2f5 JH |
982 | } |
983 | ||
17bf35a3 JH |
984 | void compile_grep_patterns(struct grep_opt *opt) |
985 | { | |
986 | compile_grep_patterns_real(opt); | |
987 | if (opt->debug) | |
988 | dump_grep_expression(opt); | |
989 | } | |
990 | ||
b48fb5b6 JH |
991 | static void free_pattern_expr(struct grep_expr *x) |
992 | { | |
993 | switch (x->node) { | |
5aaeb733 | 994 | case GREP_NODE_TRUE: |
b48fb5b6 JH |
995 | case GREP_NODE_ATOM: |
996 | break; | |
997 | case GREP_NODE_NOT: | |
998 | free_pattern_expr(x->u.unary); | |
999 | break; | |
1000 | case GREP_NODE_AND: | |
1001 | case GREP_NODE_OR: | |
1002 | free_pattern_expr(x->u.binary.left); | |
1003 | free_pattern_expr(x->u.binary.right); | |
1004 | break; | |
1005 | } | |
1006 | free(x); | |
1007 | } | |
1008 | ||
1009 | void free_grep_patterns(struct grep_opt *opt) | |
1010 | { | |
1011 | struct grep_pat *p, *n; | |
1012 | ||
1013 | for (p = opt->pattern_list; p; p = n) { | |
1014 | n = p->next; | |
1015 | switch (p->token) { | |
1016 | case GREP_PATTERN: /* atom */ | |
1017 | case GREP_PATTERN_HEAD: | |
1018 | case GREP_PATTERN_BODY: | |
9eceddee FK |
1019 | if (p->kws) |
1020 | kwsfree(p->kws); | |
6d4b5747 ÆAB |
1021 | else if (p->pcre1_regexp) |
1022 | free_pcre1_regexp(p); | |
94da9193 ÆAB |
1023 | else if (p->pcre2_pattern) |
1024 | free_pcre2_pattern(p); | |
63e7e9d8 MK |
1025 | else |
1026 | regfree(&p->regexp); | |
526a858a | 1027 | free(p->pattern); |
b48fb5b6 JH |
1028 | break; |
1029 | default: | |
1030 | break; | |
1031 | } | |
1032 | free(p); | |
1033 | } | |
1034 | ||
1035 | if (!opt->extended) | |
1036 | return; | |
1037 | free_pattern_expr(opt->pattern_expression); | |
1038 | } | |
1039 | ||
83b5d2f5 JH |
1040 | static char *end_of_line(char *cp, unsigned long *left) |
1041 | { | |
1042 | unsigned long l = *left; | |
1043 | while (l && *cp != '\n') { | |
1044 | l--; | |
1045 | cp++; | |
1046 | } | |
1047 | *left = l; | |
1048 | return cp; | |
1049 | } | |
1050 | ||
1051 | static int word_char(char ch) | |
1052 | { | |
1053 | return isalnum(ch) || ch == '_'; | |
1054 | } | |
1055 | ||
55f638bd ML |
1056 | static void output_color(struct grep_opt *opt, const void *data, size_t size, |
1057 | const char *color) | |
1058 | { | |
daa0c3d9 | 1059 | if (want_color(opt->color) && color && color[0]) { |
55f638bd ML |
1060 | opt->output(opt, color, strlen(color)); |
1061 | opt->output(opt, data, size); | |
1062 | opt->output(opt, GIT_COLOR_RESET, strlen(GIT_COLOR_RESET)); | |
1063 | } else | |
1064 | opt->output(opt, data, size); | |
1065 | } | |
1066 | ||
1067 | static void output_sep(struct grep_opt *opt, char sign) | |
1068 | { | |
1069 | if (opt->null_following_name) | |
1070 | opt->output(opt, "\0", 1); | |
1071 | else | |
1072 | output_color(opt, &sign, 1, opt->color_sep); | |
1073 | } | |
1074 | ||
83caecca RZ |
1075 | static void show_name(struct grep_opt *opt, const char *name) |
1076 | { | |
55f638bd | 1077 | output_color(opt, name, strlen(name), opt->color_filename); |
5b594f45 | 1078 | opt->output(opt, opt->null_following_name ? "\0" : "\n", 1); |
83caecca RZ |
1079 | } |
1080 | ||
ed40a095 RS |
1081 | static int fixmatch(struct grep_pat *p, char *line, char *eol, |
1082 | regmatch_t *match) | |
83b5d2f5 | 1083 | { |
9eceddee FK |
1084 | struct kwsmatch kwsm; |
1085 | size_t offset = kwsexec(p->kws, line, eol - line, &kwsm); | |
1086 | if (offset == -1) { | |
83b5d2f5 JH |
1087 | match->rm_so = match->rm_eo = -1; |
1088 | return REG_NOMATCH; | |
9eceddee FK |
1089 | } else { |
1090 | match->rm_so = offset; | |
1091 | match->rm_eo = match->rm_so + kwsm.size[0]; | |
83b5d2f5 JH |
1092 | return 0; |
1093 | } | |
1094 | } | |
1095 | ||
97e77784 MK |
1096 | static int patmatch(struct grep_pat *p, char *line, char *eol, |
1097 | regmatch_t *match, int eflags) | |
1098 | { | |
1099 | int hit; | |
1100 | ||
1101 | if (p->fixed) | |
1102 | hit = !fixmatch(p, line, eol, match); | |
6d4b5747 ÆAB |
1103 | else if (p->pcre1_regexp) |
1104 | hit = !pcre1match(p, line, eol, match, eflags); | |
94da9193 ÆAB |
1105 | else if (p->pcre2_pattern) |
1106 | hit = !pcre2match(p, line, eol, match, eflags); | |
97e77784 | 1107 | else |
b7d36ffc JS |
1108 | hit = !regexec_buf(&p->regexp, line, eol - line, 1, match, |
1109 | eflags); | |
97e77784 MK |
1110 | |
1111 | return hit; | |
1112 | } | |
1113 | ||
a4d7d2c6 JH |
1114 | static int strip_timestamp(char *bol, char **eol_p) |
1115 | { | |
1116 | char *eol = *eol_p; | |
1117 | int ch; | |
1118 | ||
1119 | while (bol < --eol) { | |
1120 | if (*eol != '>') | |
1121 | continue; | |
1122 | *eol_p = ++eol; | |
1123 | ch = *eol; | |
1124 | *eol = '\0'; | |
1125 | return ch; | |
1126 | } | |
1127 | return 0; | |
1128 | } | |
1129 | ||
1130 | static struct { | |
1131 | const char *field; | |
1132 | size_t len; | |
1133 | } header_field[] = { | |
1134 | { "author ", 7 }, | |
1135 | { "committer ", 10 }, | |
72fd13f7 | 1136 | { "reflog ", 7 }, |
a4d7d2c6 JH |
1137 | }; |
1138 | ||
d7eb527d | 1139 | static int match_one_pattern(struct grep_pat *p, char *bol, char *eol, |
79212772 RS |
1140 | enum grep_context ctx, |
1141 | regmatch_t *pmatch, int eflags) | |
83b5d2f5 JH |
1142 | { |
1143 | int hit = 0; | |
a4d7d2c6 | 1144 | int saved_ch = 0; |
e701fadb | 1145 | const char *start = bol; |
83b5d2f5 | 1146 | |
480c1ca6 JH |
1147 | if ((p->token != GREP_PATTERN) && |
1148 | ((p->token == GREP_PATTERN_HEAD) != (ctx == GREP_CONTEXT_HEAD))) | |
1149 | return 0; | |
1150 | ||
a4d7d2c6 JH |
1151 | if (p->token == GREP_PATTERN_HEAD) { |
1152 | const char *field; | |
1153 | size_t len; | |
1154 | assert(p->field < ARRAY_SIZE(header_field)); | |
1155 | field = header_field[p->field].field; | |
1156 | len = header_field[p->field].len; | |
1157 | if (strncmp(bol, field, len)) | |
1158 | return 0; | |
1159 | bol += len; | |
ad4813b3 NTND |
1160 | switch (p->field) { |
1161 | case GREP_HEADER_AUTHOR: | |
1162 | case GREP_HEADER_COMMITTER: | |
1163 | saved_ch = strip_timestamp(bol, &eol); | |
1164 | break; | |
1165 | default: | |
1166 | break; | |
1167 | } | |
a4d7d2c6 JH |
1168 | } |
1169 | ||
83b5d2f5 | 1170 | again: |
97e77784 | 1171 | hit = patmatch(p, bol, eol, pmatch, eflags); |
83b5d2f5 | 1172 | |
d7eb527d | 1173 | if (hit && p->word_regexp) { |
83b5d2f5 | 1174 | if ((pmatch[0].rm_so < 0) || |
84201eae | 1175 | (eol - bol) < pmatch[0].rm_so || |
83b5d2f5 JH |
1176 | (pmatch[0].rm_eo < 0) || |
1177 | (eol - bol) < pmatch[0].rm_eo) | |
1178 | die("regexp returned nonsense"); | |
1179 | ||
1180 | /* Match beginning must be either beginning of the | |
1181 | * line, or at word boundary (i.e. the last char must | |
1182 | * not be a word char). Similarly, match end must be | |
1183 | * either end of the line, or at word boundary | |
1184 | * (i.e. the next char must not be a word char). | |
1185 | */ | |
fb62eb7f | 1186 | if ( ((pmatch[0].rm_so == 0) || |
83b5d2f5 JH |
1187 | !word_char(bol[pmatch[0].rm_so-1])) && |
1188 | ((pmatch[0].rm_eo == (eol-bol)) || | |
1189 | !word_char(bol[pmatch[0].rm_eo])) ) | |
1190 | ; | |
1191 | else | |
1192 | hit = 0; | |
1193 | ||
84201eae RS |
1194 | /* Words consist of at least one character. */ |
1195 | if (pmatch->rm_so == pmatch->rm_eo) | |
1196 | hit = 0; | |
1197 | ||
83b5d2f5 JH |
1198 | if (!hit && pmatch[0].rm_so + bol + 1 < eol) { |
1199 | /* There could be more than one match on the | |
1200 | * line, and the first match might not be | |
1201 | * strict word match. But later ones could be! | |
fb62eb7f RS |
1202 | * Forward to the next possible start, i.e. the |
1203 | * next position following a non-word char. | |
83b5d2f5 JH |
1204 | */ |
1205 | bol = pmatch[0].rm_so + bol + 1; | |
fb62eb7f RS |
1206 | while (word_char(bol[-1]) && bol < eol) |
1207 | bol++; | |
dbb6a4ad | 1208 | eflags |= REG_NOTBOL; |
fb62eb7f RS |
1209 | if (bol < eol) |
1210 | goto again; | |
83b5d2f5 JH |
1211 | } |
1212 | } | |
a4d7d2c6 JH |
1213 | if (p->token == GREP_PATTERN_HEAD && saved_ch) |
1214 | *eol = saved_ch; | |
e701fadb RS |
1215 | if (hit) { |
1216 | pmatch[0].rm_so += bol - start; | |
1217 | pmatch[0].rm_eo += bol - start; | |
1218 | } | |
83b5d2f5 JH |
1219 | return hit; |
1220 | } | |
1221 | ||
d7eb527d RS |
1222 | static int match_expr_eval(struct grep_expr *x, char *bol, char *eol, |
1223 | enum grep_context ctx, int collect_hits) | |
83b5d2f5 | 1224 | { |
0ab7befa | 1225 | int h = 0; |
79212772 | 1226 | regmatch_t match; |
0ab7befa | 1227 | |
c922b01f LT |
1228 | if (!x) |
1229 | die("Not a valid grep expression"); | |
83b5d2f5 | 1230 | switch (x->node) { |
5aaeb733 JH |
1231 | case GREP_NODE_TRUE: |
1232 | h = 1; | |
1233 | break; | |
83b5d2f5 | 1234 | case GREP_NODE_ATOM: |
79212772 | 1235 | h = match_one_pattern(x->u.atom, bol, eol, ctx, &match, 0); |
83b5d2f5 JH |
1236 | break; |
1237 | case GREP_NODE_NOT: | |
d7eb527d | 1238 | h = !match_expr_eval(x->u.unary, bol, eol, ctx, 0); |
0ab7befa | 1239 | break; |
83b5d2f5 | 1240 | case GREP_NODE_AND: |
d7eb527d | 1241 | if (!match_expr_eval(x->u.binary.left, bol, eol, ctx, 0)) |
252d560d | 1242 | return 0; |
d7eb527d | 1243 | h = match_expr_eval(x->u.binary.right, bol, eol, ctx, 0); |
0ab7befa | 1244 | break; |
83b5d2f5 | 1245 | case GREP_NODE_OR: |
0ab7befa | 1246 | if (!collect_hits) |
d7eb527d | 1247 | return (match_expr_eval(x->u.binary.left, |
0ab7befa | 1248 | bol, eol, ctx, 0) || |
d7eb527d | 1249 | match_expr_eval(x->u.binary.right, |
0ab7befa | 1250 | bol, eol, ctx, 0)); |
d7eb527d | 1251 | h = match_expr_eval(x->u.binary.left, bol, eol, ctx, 0); |
0ab7befa | 1252 | x->u.binary.left->hit |= h; |
d7eb527d | 1253 | h |= match_expr_eval(x->u.binary.right, bol, eol, ctx, 1); |
0ab7befa JH |
1254 | break; |
1255 | default: | |
d7530708 | 1256 | die("Unexpected node type (internal error) %d", x->node); |
83b5d2f5 | 1257 | } |
0ab7befa JH |
1258 | if (collect_hits) |
1259 | x->hit |= h; | |
1260 | return h; | |
83b5d2f5 JH |
1261 | } |
1262 | ||
480c1ca6 | 1263 | static int match_expr(struct grep_opt *opt, char *bol, char *eol, |
0ab7befa | 1264 | enum grep_context ctx, int collect_hits) |
83b5d2f5 JH |
1265 | { |
1266 | struct grep_expr *x = opt->pattern_expression; | |
d7eb527d | 1267 | return match_expr_eval(x, bol, eol, ctx, collect_hits); |
83b5d2f5 JH |
1268 | } |
1269 | ||
480c1ca6 | 1270 | static int match_line(struct grep_opt *opt, char *bol, char *eol, |
0ab7befa | 1271 | enum grep_context ctx, int collect_hits) |
83b5d2f5 JH |
1272 | { |
1273 | struct grep_pat *p; | |
79212772 RS |
1274 | regmatch_t match; |
1275 | ||
83b5d2f5 | 1276 | if (opt->extended) |
0ab7befa JH |
1277 | return match_expr(opt, bol, eol, ctx, collect_hits); |
1278 | ||
1279 | /* we do not call with collect_hits without being extended */ | |
83b5d2f5 | 1280 | for (p = opt->pattern_list; p; p = p->next) { |
79212772 | 1281 | if (match_one_pattern(p, bol, eol, ctx, &match, 0)) |
83b5d2f5 JH |
1282 | return 1; |
1283 | } | |
1284 | return 0; | |
1285 | } | |
1286 | ||
7e8f59d5 RS |
1287 | static int match_next_pattern(struct grep_pat *p, char *bol, char *eol, |
1288 | enum grep_context ctx, | |
1289 | regmatch_t *pmatch, int eflags) | |
1290 | { | |
1291 | regmatch_t match; | |
1292 | ||
1293 | if (!match_one_pattern(p, bol, eol, ctx, &match, eflags)) | |
1294 | return 0; | |
1295 | if (match.rm_so < 0 || match.rm_eo < 0) | |
1296 | return 0; | |
1297 | if (pmatch->rm_so >= 0 && pmatch->rm_eo >= 0) { | |
1298 | if (match.rm_so > pmatch->rm_so) | |
1299 | return 1; | |
1300 | if (match.rm_so == pmatch->rm_so && match.rm_eo < pmatch->rm_eo) | |
1301 | return 1; | |
1302 | } | |
1303 | pmatch->rm_so = match.rm_so; | |
1304 | pmatch->rm_eo = match.rm_eo; | |
1305 | return 1; | |
1306 | } | |
1307 | ||
1308 | static int next_match(struct grep_opt *opt, char *bol, char *eol, | |
1309 | enum grep_context ctx, regmatch_t *pmatch, int eflags) | |
1310 | { | |
1311 | struct grep_pat *p; | |
1312 | int hit = 0; | |
1313 | ||
1314 | pmatch->rm_so = pmatch->rm_eo = -1; | |
1315 | if (bol < eol) { | |
1316 | for (p = opt->pattern_list; p; p = p->next) { | |
1317 | switch (p->token) { | |
1318 | case GREP_PATTERN: /* atom */ | |
1319 | case GREP_PATTERN_HEAD: | |
1320 | case GREP_PATTERN_BODY: | |
1321 | hit |= match_next_pattern(p, bol, eol, ctx, | |
1322 | pmatch, eflags); | |
1323 | break; | |
1324 | default: | |
1325 | break; | |
1326 | } | |
1327 | } | |
1328 | } | |
1329 | return hit; | |
1330 | } | |
1331 | ||
1332 | static void show_line(struct grep_opt *opt, char *bol, char *eol, | |
1333 | const char *name, unsigned lno, char sign) | |
1334 | { | |
1335 | int rest = eol - bol; | |
79a77109 | 1336 | const char *match_color, *line_color = NULL; |
7e8f59d5 | 1337 | |
a8f0e764 RS |
1338 | if (opt->file_break && opt->last_shown == 0) { |
1339 | if (opt->show_hunk_mark) | |
1340 | opt->output(opt, "\n", 1); | |
ba8ea749 | 1341 | } else if (opt->pre_context || opt->post_context || opt->funcbody) { |
046802d0 | 1342 | if (opt->last_shown == 0) { |
55f638bd ML |
1343 | if (opt->show_hunk_mark) { |
1344 | output_color(opt, "--", 2, opt->color_sep); | |
1345 | opt->output(opt, "\n", 1); | |
07b838f0 | 1346 | } |
55f638bd ML |
1347 | } else if (lno > opt->last_shown + 1) { |
1348 | output_color(opt, "--", 2, opt->color_sep); | |
1349 | opt->output(opt, "\n", 1); | |
1350 | } | |
5dd06d38 | 1351 | } |
1d84f72e RS |
1352 | if (opt->heading && opt->last_shown == 0) { |
1353 | output_color(opt, name, strlen(name), opt->color_filename); | |
1354 | opt->output(opt, "\n", 1); | |
1355 | } | |
5dd06d38 RS |
1356 | opt->last_shown = lno; |
1357 | ||
1d84f72e | 1358 | if (!opt->heading && opt->pathname) { |
55f638bd ML |
1359 | output_color(opt, name, strlen(name), opt->color_filename); |
1360 | output_sep(opt, sign); | |
5b594f45 FK |
1361 | } |
1362 | if (opt->linenum) { | |
1363 | char buf[32]; | |
1a168e5c | 1364 | xsnprintf(buf, sizeof(buf), "%d", lno); |
55f638bd ML |
1365 | output_color(opt, buf, strlen(buf), opt->color_lineno); |
1366 | output_sep(opt, sign); | |
5b594f45 | 1367 | } |
7e8f59d5 RS |
1368 | if (opt->color) { |
1369 | regmatch_t match; | |
1370 | enum grep_context ctx = GREP_CONTEXT_BODY; | |
1371 | int ch = *eol; | |
1372 | int eflags = 0; | |
1373 | ||
79a77109 RS |
1374 | if (sign == ':') |
1375 | match_color = opt->color_match_selected; | |
1376 | else | |
1377 | match_color = opt->color_match_context; | |
00588bb5 ML |
1378 | if (sign == ':') |
1379 | line_color = opt->color_selected; | |
1380 | else if (sign == '-') | |
1381 | line_color = opt->color_context; | |
1382 | else if (sign == '=') | |
1383 | line_color = opt->color_function; | |
7e8f59d5 RS |
1384 | *eol = '\0'; |
1385 | while (next_match(opt, bol, eol, ctx, &match, eflags)) { | |
1f5b9cc4 RS |
1386 | if (match.rm_so == match.rm_eo) |
1387 | break; | |
5b594f45 | 1388 | |
00588bb5 | 1389 | output_color(opt, bol, match.rm_so, line_color); |
55f638bd | 1390 | output_color(opt, bol + match.rm_so, |
79a77109 | 1391 | match.rm_eo - match.rm_so, match_color); |
7e8f59d5 RS |
1392 | bol += match.rm_eo; |
1393 | rest -= match.rm_eo; | |
1394 | eflags = REG_NOTBOL; | |
1395 | } | |
1396 | *eol = ch; | |
1397 | } | |
00588bb5 | 1398 | output_color(opt, bol, rest, line_color); |
5b594f45 | 1399 | opt->output(opt, "\n", 1); |
7e8f59d5 RS |
1400 | } |
1401 | ||
0579f91d | 1402 | #ifndef NO_PTHREADS |
78db6ea9 JK |
1403 | int grep_use_locks; |
1404 | ||
0579f91d TR |
1405 | /* |
1406 | * This lock protects access to the gitattributes machinery, which is | |
1407 | * not thread-safe. | |
1408 | */ | |
1409 | pthread_mutex_t grep_attr_mutex; | |
1410 | ||
78db6ea9 | 1411 | static inline void grep_attr_lock(void) |
0579f91d | 1412 | { |
78db6ea9 | 1413 | if (grep_use_locks) |
0579f91d TR |
1414 | pthread_mutex_lock(&grep_attr_mutex); |
1415 | } | |
1416 | ||
78db6ea9 | 1417 | static inline void grep_attr_unlock(void) |
0579f91d | 1418 | { |
78db6ea9 | 1419 | if (grep_use_locks) |
0579f91d TR |
1420 | pthread_mutex_unlock(&grep_attr_mutex); |
1421 | } | |
b3aeb285 JK |
1422 | |
1423 | /* | |
1424 | * Same as git_attr_mutex, but protecting the thread-unsafe object db access. | |
1425 | */ | |
1426 | pthread_mutex_t grep_read_mutex; | |
1427 | ||
0579f91d | 1428 | #else |
78db6ea9 JK |
1429 | #define grep_attr_lock() |
1430 | #define grep_attr_unlock() | |
0579f91d TR |
1431 | #endif |
1432 | ||
e1327023 | 1433 | static int match_funcname(struct grep_opt *opt, struct grep_source *gs, char *bol, char *eol) |
2944e4e6 | 1434 | { |
60ecac98 | 1435 | xdemitconf_t *xecfg = opt->priv; |
0579f91d | 1436 | if (xecfg && !xecfg->find_func) { |
94ad9d9e JK |
1437 | grep_source_load_driver(gs); |
1438 | if (gs->driver->funcname.pattern) { | |
1439 | const struct userdiff_funcname *pe = &gs->driver->funcname; | |
0579f91d TR |
1440 | xdiff_set_find_func(xecfg, pe->pattern, pe->cflags); |
1441 | } else { | |
1442 | xecfg = opt->priv = NULL; | |
1443 | } | |
1444 | } | |
1445 | ||
1446 | if (xecfg) { | |
60ecac98 RS |
1447 | char buf[1]; |
1448 | return xecfg->find_func(bol, eol - bol, buf, 1, | |
1449 | xecfg->find_func_priv) >= 0; | |
1450 | } | |
1451 | ||
2944e4e6 RS |
1452 | if (bol == eol) |
1453 | return 0; | |
1454 | if (isalpha(*bol) || *bol == '_' || *bol == '$') | |
1455 | return 1; | |
1456 | return 0; | |
1457 | } | |
1458 | ||
e1327023 JK |
1459 | static void show_funcname_line(struct grep_opt *opt, struct grep_source *gs, |
1460 | char *bol, unsigned lno) | |
2944e4e6 | 1461 | { |
e1327023 | 1462 | while (bol > gs->buf) { |
2944e4e6 RS |
1463 | char *eol = --bol; |
1464 | ||
e1327023 | 1465 | while (bol > gs->buf && bol[-1] != '\n') |
2944e4e6 RS |
1466 | bol--; |
1467 | lno--; | |
1468 | ||
1469 | if (lno <= opt->last_shown) | |
1470 | break; | |
1471 | ||
e1327023 JK |
1472 | if (match_funcname(opt, gs, bol, eol)) { |
1473 | show_line(opt, bol, eol, gs->name, lno, '='); | |
2944e4e6 RS |
1474 | break; |
1475 | } | |
1476 | } | |
1477 | } | |
1478 | ||
e1327023 | 1479 | static void show_pre_context(struct grep_opt *opt, struct grep_source *gs, |
ba8ea749 | 1480 | char *bol, char *end, unsigned lno) |
49de3216 | 1481 | { |
2944e4e6 | 1482 | unsigned cur = lno, from = 1, funcname_lno = 0; |
ba8ea749 RS |
1483 | int funcname_needed = !!opt->funcname; |
1484 | ||
e1327023 | 1485 | if (opt->funcbody && !match_funcname(opt, gs, bol, end)) |
ba8ea749 | 1486 | funcname_needed = 2; |
49de3216 RS |
1487 | |
1488 | if (opt->pre_context < lno) | |
1489 | from = lno - opt->pre_context; | |
1490 | if (from <= opt->last_shown) | |
1491 | from = opt->last_shown + 1; | |
1492 | ||
1493 | /* Rewind. */ | |
e1327023 | 1494 | while (bol > gs->buf && |
ba8ea749 | 1495 | cur > (funcname_needed == 2 ? opt->last_shown + 1 : from)) { |
2944e4e6 RS |
1496 | char *eol = --bol; |
1497 | ||
e1327023 | 1498 | while (bol > gs->buf && bol[-1] != '\n') |
49de3216 RS |
1499 | bol--; |
1500 | cur--; | |
e1327023 | 1501 | if (funcname_needed && match_funcname(opt, gs, bol, eol)) { |
2944e4e6 RS |
1502 | funcname_lno = cur; |
1503 | funcname_needed = 0; | |
1504 | } | |
49de3216 RS |
1505 | } |
1506 | ||
2944e4e6 RS |
1507 | /* We need to look even further back to find a function signature. */ |
1508 | if (opt->funcname && funcname_needed) | |
e1327023 | 1509 | show_funcname_line(opt, gs, bol, cur); |
2944e4e6 | 1510 | |
49de3216 RS |
1511 | /* Back forward. */ |
1512 | while (cur < lno) { | |
2944e4e6 | 1513 | char *eol = bol, sign = (cur == funcname_lno) ? '=' : '-'; |
49de3216 RS |
1514 | |
1515 | while (*eol != '\n') | |
1516 | eol++; | |
e1327023 | 1517 | show_line(opt, bol, eol, gs->name, cur, sign); |
49de3216 RS |
1518 | bol = eol + 1; |
1519 | cur++; | |
1520 | } | |
1521 | } | |
1522 | ||
a26345b6 JH |
1523 | static int should_lookahead(struct grep_opt *opt) |
1524 | { | |
1525 | struct grep_pat *p; | |
1526 | ||
1527 | if (opt->extended) | |
1528 | return 0; /* punt for too complex stuff */ | |
1529 | if (opt->invert) | |
1530 | return 0; | |
1531 | for (p = opt->pattern_list; p; p = p->next) { | |
1532 | if (p->token != GREP_PATTERN) | |
1533 | return 0; /* punt for "header only" and stuff */ | |
1534 | } | |
1535 | return 1; | |
1536 | } | |
1537 | ||
1538 | static int look_ahead(struct grep_opt *opt, | |
1539 | unsigned long *left_p, | |
1540 | unsigned *lno_p, | |
1541 | char **bol_p) | |
1542 | { | |
1543 | unsigned lno = *lno_p; | |
1544 | char *bol = *bol_p; | |
1545 | struct grep_pat *p; | |
1546 | char *sp, *last_bol; | |
1547 | regoff_t earliest = -1; | |
1548 | ||
1549 | for (p = opt->pattern_list; p; p = p->next) { | |
1550 | int hit; | |
1551 | regmatch_t m; | |
1552 | ||
97e77784 | 1553 | hit = patmatch(p, bol, bol + *left_p, &m, 0); |
a26345b6 JH |
1554 | if (!hit || m.rm_so < 0 || m.rm_eo < 0) |
1555 | continue; | |
1556 | if (earliest < 0 || m.rm_so < earliest) | |
1557 | earliest = m.rm_so; | |
1558 | } | |
1559 | ||
1560 | if (earliest < 0) { | |
1561 | *bol_p = bol + *left_p; | |
1562 | *left_p = 0; | |
1563 | return 1; | |
1564 | } | |
1565 | for (sp = bol + earliest; bol < sp && sp[-1] != '\n'; sp--) | |
1566 | ; /* find the beginning of the line */ | |
1567 | last_bol = sp; | |
1568 | ||
1569 | for (sp = bol; sp < last_bol; sp++) { | |
1570 | if (*sp == '\n') | |
1571 | lno++; | |
1572 | } | |
1573 | *left_p -= last_bol - bol; | |
1574 | *bol_p = last_bol; | |
1575 | *lno_p = lno; | |
1576 | return 0; | |
1577 | } | |
1578 | ||
335ec3bf JK |
1579 | static int fill_textconv_grep(struct userdiff_driver *driver, |
1580 | struct grep_source *gs) | |
1581 | { | |
1582 | struct diff_filespec *df; | |
1583 | char *buf; | |
1584 | size_t size; | |
1585 | ||
1586 | if (!driver || !driver->textconv) | |
1587 | return grep_source_load(gs); | |
1588 | ||
1589 | /* | |
1590 | * The textconv interface is intimately tied to diff_filespecs, so we | |
1591 | * have to pretend to be one. If we could unify the grep_source | |
1592 | * and diff_filespec structs, this mess could just go away. | |
1593 | */ | |
1594 | df = alloc_filespec(gs->path); | |
1595 | switch (gs->type) { | |
1c41c82b | 1596 | case GREP_SOURCE_OID: |
335ec3bf JK |
1597 | fill_filespec(df, gs->identifier, 1, 0100644); |
1598 | break; | |
1599 | case GREP_SOURCE_FILE: | |
f9704c2d | 1600 | fill_filespec(df, &null_oid, 0, 0100644); |
335ec3bf JK |
1601 | break; |
1602 | default: | |
1603 | die("BUG: attempt to textconv something without a path?"); | |
1604 | } | |
1605 | ||
1606 | /* | |
1607 | * fill_textconv is not remotely thread-safe; it may load objects | |
1608 | * behind the scenes, and it modifies the global diff tempfile | |
1609 | * structure. | |
1610 | */ | |
1611 | grep_read_lock(); | |
1612 | size = fill_textconv(driver, df, &buf); | |
1613 | grep_read_unlock(); | |
1614 | free_filespec(df); | |
1615 | ||
1616 | /* | |
1617 | * The normal fill_textconv usage by the diff machinery would just keep | |
1618 | * the textconv'd buf separate from the diff_filespec. But much of the | |
1619 | * grep code passes around a grep_source and assumes that its "buf" | |
1620 | * pointer is the beginning of the thing we are searching. So let's | |
1621 | * install our textconv'd version into the grep_source, taking care not | |
1622 | * to leak any existing buffer. | |
1623 | */ | |
1624 | grep_source_clear_data(gs); | |
1625 | gs->buf = buf; | |
1626 | gs->size = size; | |
1627 | ||
1628 | return 0; | |
1629 | } | |
1630 | ||
4aa2c475 RS |
1631 | static int is_empty_line(const char *bol, const char *eol) |
1632 | { | |
1633 | while (bol < eol && isspace(*bol)) | |
1634 | bol++; | |
1635 | return bol == eol; | |
1636 | } | |
1637 | ||
e1327023 | 1638 | static int grep_source_1(struct grep_opt *opt, struct grep_source *gs, int collect_hits) |
83b5d2f5 | 1639 | { |
e1327023 | 1640 | char *bol; |
4aa2c475 | 1641 | char *peek_bol = NULL; |
e1327023 | 1642 | unsigned long left; |
83b5d2f5 | 1643 | unsigned lno = 1; |
83b5d2f5 | 1644 | unsigned last_hit = 0; |
83b5d2f5 | 1645 | int binary_match_only = 0; |
83b5d2f5 | 1646 | unsigned count = 0; |
a26345b6 | 1647 | int try_lookahead = 0; |
ba8ea749 | 1648 | int show_function = 0; |
335ec3bf | 1649 | struct userdiff_driver *textconv = NULL; |
480c1ca6 | 1650 | enum grep_context ctx = GREP_CONTEXT_HEAD; |
60ecac98 | 1651 | xdemitconf_t xecfg; |
83b5d2f5 | 1652 | |
5b594f45 FK |
1653 | if (!opt->output) |
1654 | opt->output = std_output; | |
1655 | ||
ba8ea749 RS |
1656 | if (opt->pre_context || opt->post_context || opt->file_break || |
1657 | opt->funcbody) { | |
08303c36 RS |
1658 | /* Show hunk marks, except for the first file. */ |
1659 | if (opt->last_shown) | |
1660 | opt->show_hunk_mark = 1; | |
1661 | /* | |
1662 | * If we're using threads then we can't easily identify | |
1663 | * the first file. Always put hunk marks in that case | |
1664 | * and skip the very first one later in work_done(). | |
1665 | */ | |
1666 | if (opt->output != std_output) | |
1667 | opt->show_hunk_mark = 1; | |
1668 | } | |
431d6e7b RS |
1669 | opt->last_shown = 0; |
1670 | ||
335ec3bf JK |
1671 | if (opt->allow_textconv) { |
1672 | grep_source_load_driver(gs); | |
1673 | /* | |
1674 | * We might set up the shared textconv cache data here, which | |
1675 | * is not thread-safe. | |
1676 | */ | |
1677 | grep_attr_lock(); | |
1678 | textconv = userdiff_get_textconv(gs->driver); | |
1679 | grep_attr_unlock(); | |
1680 | } | |
1681 | ||
1682 | /* | |
1683 | * We know the result of a textconv is text, so we only have to care | |
1684 | * about binary handling if we are not using it. | |
1685 | */ | |
1686 | if (!textconv) { | |
1687 | switch (opt->binary) { | |
1688 | case GREP_BINARY_DEFAULT: | |
1689 | if (grep_source_is_binary(gs)) | |
1690 | binary_match_only = 1; | |
1691 | break; | |
1692 | case GREP_BINARY_NOMATCH: | |
1693 | if (grep_source_is_binary(gs)) | |
1694 | return 0; /* Assume unmatch */ | |
1695 | break; | |
1696 | case GREP_BINARY_TEXT: | |
1697 | break; | |
1698 | default: | |
ef1177d1 | 1699 | die("BUG: unknown binary handling mode"); |
335ec3bf | 1700 | } |
83b5d2f5 JH |
1701 | } |
1702 | ||
60ecac98 | 1703 | memset(&xecfg, 0, sizeof(xecfg)); |
0579f91d TR |
1704 | opt->priv = &xecfg; |
1705 | ||
a26345b6 | 1706 | try_lookahead = should_lookahead(opt); |
60ecac98 | 1707 | |
335ec3bf | 1708 | if (fill_textconv_grep(textconv, gs) < 0) |
08265798 JK |
1709 | return 0; |
1710 | ||
e1327023 JK |
1711 | bol = gs->buf; |
1712 | left = gs->size; | |
83b5d2f5 JH |
1713 | while (left) { |
1714 | char *eol, ch; | |
0ab7befa | 1715 | int hit; |
83b5d2f5 | 1716 | |
a26345b6 | 1717 | /* |
8997da38 | 1718 | * look_ahead() skips quickly to the line that possibly |
a26345b6 JH |
1719 | * has the next hit; don't call it if we need to do |
1720 | * something more than just skipping the current line | |
1721 | * in response to an unmatch for the current line. E.g. | |
1722 | * inside a post-context window, we will show the current | |
1723 | * line as a context around the previous hit when it | |
1724 | * doesn't hit. | |
1725 | */ | |
1726 | if (try_lookahead | |
1727 | && !(last_hit | |
ba8ea749 RS |
1728 | && (show_function || |
1729 | lno <= last_hit + opt->post_context)) | |
a26345b6 JH |
1730 | && look_ahead(opt, &left, &lno, &bol)) |
1731 | break; | |
83b5d2f5 JH |
1732 | eol = end_of_line(bol, &left); |
1733 | ch = *eol; | |
1734 | *eol = 0; | |
1735 | ||
480c1ca6 JH |
1736 | if ((ctx == GREP_CONTEXT_HEAD) && (eol == bol)) |
1737 | ctx = GREP_CONTEXT_BODY; | |
1738 | ||
0ab7befa | 1739 | hit = match_line(opt, bol, eol, ctx, collect_hits); |
83b5d2f5 JH |
1740 | *eol = ch; |
1741 | ||
0ab7befa JH |
1742 | if (collect_hits) |
1743 | goto next_line; | |
1744 | ||
83b5d2f5 JH |
1745 | /* "grep -v -e foo -e bla" should list lines |
1746 | * that do not have either, so inversion should | |
1747 | * be done outside. | |
1748 | */ | |
1749 | if (opt->invert) | |
1750 | hit = !hit; | |
1751 | if (opt->unmatch_name_only) { | |
1752 | if (hit) | |
1753 | return 0; | |
1754 | goto next_line; | |
1755 | } | |
1756 | if (hit) { | |
1757 | count++; | |
1758 | if (opt->status_only) | |
1759 | return 1; | |
321ffcc0 | 1760 | if (opt->name_only) { |
e1327023 | 1761 | show_name(opt, gs->name); |
321ffcc0 RS |
1762 | return 1; |
1763 | } | |
c30c10cf RS |
1764 | if (opt->count) |
1765 | goto next_line; | |
83b5d2f5 | 1766 | if (binary_match_only) { |
5b594f45 | 1767 | opt->output(opt, "Binary file ", 12); |
e1327023 | 1768 | output_color(opt, gs->name, strlen(gs->name), |
55f638bd | 1769 | opt->color_filename); |
5b594f45 | 1770 | opt->output(opt, " matches\n", 9); |
83b5d2f5 JH |
1771 | return 1; |
1772 | } | |
83b5d2f5 JH |
1773 | /* Hit at this line. If we haven't shown the |
1774 | * pre-context lines, we would need to show them. | |
83b5d2f5 | 1775 | */ |
ba8ea749 | 1776 | if (opt->pre_context || opt->funcbody) |
e1327023 | 1777 | show_pre_context(opt, gs, bol, eol, lno); |
2944e4e6 | 1778 | else if (opt->funcname) |
e1327023 JK |
1779 | show_funcname_line(opt, gs, bol, lno); |
1780 | show_line(opt, bol, eol, gs->name, lno, ':'); | |
5dd06d38 | 1781 | last_hit = lno; |
ba8ea749 RS |
1782 | if (opt->funcbody) |
1783 | show_function = 1; | |
1784 | goto next_line; | |
83b5d2f5 | 1785 | } |
4aa2c475 RS |
1786 | if (show_function && (!peek_bol || peek_bol < bol)) { |
1787 | unsigned long peek_left = left; | |
1788 | char *peek_eol = eol; | |
1789 | ||
1790 | /* | |
1791 | * Trailing empty lines are not interesting. | |
1792 | * Peek past them to see if they belong to the | |
1793 | * body of the current function. | |
1794 | */ | |
1795 | peek_bol = bol; | |
1796 | while (is_empty_line(peek_bol, peek_eol)) { | |
1797 | peek_bol = peek_eol + 1; | |
1798 | peek_eol = end_of_line(peek_bol, &peek_left); | |
1799 | } | |
1800 | ||
1801 | if (match_funcname(opt, gs, peek_bol, peek_eol)) | |
1802 | show_function = 0; | |
1803 | } | |
ba8ea749 RS |
1804 | if (show_function || |
1805 | (last_hit && lno <= last_hit + opt->post_context)) { | |
83b5d2f5 JH |
1806 | /* If the last hit is within the post context, |
1807 | * we need to show this line. | |
1808 | */ | |
e1327023 | 1809 | show_line(opt, bol, eol, gs->name, lno, '-'); |
83b5d2f5 | 1810 | } |
83b5d2f5 JH |
1811 | |
1812 | next_line: | |
1813 | bol = eol + 1; | |
1814 | if (!left) | |
1815 | break; | |
1816 | left--; | |
1817 | lno++; | |
1818 | } | |
1819 | ||
0ab7befa JH |
1820 | if (collect_hits) |
1821 | return 0; | |
b48fb5b6 | 1822 | |
83b5d2f5 JH |
1823 | if (opt->status_only) |
1824 | return 0; | |
1825 | if (opt->unmatch_name_only) { | |
1826 | /* We did not see any hit, so we want to show this */ | |
e1327023 | 1827 | show_name(opt, gs->name); |
83b5d2f5 JH |
1828 | return 1; |
1829 | } | |
1830 | ||
60ecac98 RS |
1831 | xdiff_clear_find_func(&xecfg); |
1832 | opt->priv = NULL; | |
1833 | ||
83b5d2f5 JH |
1834 | /* NEEDSWORK: |
1835 | * The real "grep -c foo *.c" gives many "bar.c:0" lines, | |
1836 | * which feels mostly useless but sometimes useful. Maybe | |
1837 | * make it another option? For now suppress them. | |
1838 | */ | |
5b594f45 FK |
1839 | if (opt->count && count) { |
1840 | char buf[32]; | |
f76d947a RS |
1841 | if (opt->pathname) { |
1842 | output_color(opt, gs->name, strlen(gs->name), | |
1843 | opt->color_filename); | |
1844 | output_sep(opt, ':'); | |
1845 | } | |
1a168e5c | 1846 | xsnprintf(buf, sizeof(buf), "%u\n", count); |
5b594f45 | 1847 | opt->output(opt, buf, strlen(buf)); |
c30c10cf | 1848 | return 1; |
5b594f45 | 1849 | } |
83b5d2f5 JH |
1850 | return !!last_hit; |
1851 | } | |
1852 | ||
0ab7befa JH |
1853 | static void clr_hit_marker(struct grep_expr *x) |
1854 | { | |
1855 | /* All-hit markers are meaningful only at the very top level | |
1856 | * OR node. | |
1857 | */ | |
1858 | while (1) { | |
1859 | x->hit = 0; | |
1860 | if (x->node != GREP_NODE_OR) | |
1861 | return; | |
1862 | x->u.binary.left->hit = 0; | |
1863 | x = x->u.binary.right; | |
1864 | } | |
1865 | } | |
1866 | ||
1867 | static int chk_hit_marker(struct grep_expr *x) | |
1868 | { | |
1869 | /* Top level nodes have hit markers. See if they all are hits */ | |
1870 | while (1) { | |
1871 | if (x->node != GREP_NODE_OR) | |
1872 | return x->hit; | |
1873 | if (!x->u.binary.left->hit) | |
1874 | return 0; | |
1875 | x = x->u.binary.right; | |
1876 | } | |
1877 | } | |
1878 | ||
e1327023 | 1879 | int grep_source(struct grep_opt *opt, struct grep_source *gs) |
0ab7befa JH |
1880 | { |
1881 | /* | |
1882 | * we do not have to do the two-pass grep when we do not check | |
1883 | * buffer-wide "all-match". | |
1884 | */ | |
1885 | if (!opt->all_match) | |
e1327023 | 1886 | return grep_source_1(opt, gs, 0); |
0ab7befa JH |
1887 | |
1888 | /* Otherwise the toplevel "or" terms hit a bit differently. | |
1889 | * We first clear hit markers from them. | |
1890 | */ | |
1891 | clr_hit_marker(opt->pattern_expression); | |
e1327023 | 1892 | grep_source_1(opt, gs, 1); |
0ab7befa JH |
1893 | |
1894 | if (!chk_hit_marker(opt->pattern_expression)) | |
1895 | return 0; | |
1896 | ||
e1327023 JK |
1897 | return grep_source_1(opt, gs, 0); |
1898 | } | |
1899 | ||
c876d6da | 1900 | int grep_buffer(struct grep_opt *opt, char *buf, unsigned long size) |
e1327023 JK |
1901 | { |
1902 | struct grep_source gs; | |
1903 | int r; | |
1904 | ||
55c61688 | 1905 | grep_source_init(&gs, GREP_SOURCE_BUF, NULL, NULL, NULL); |
e1327023 JK |
1906 | gs.buf = buf; |
1907 | gs.size = size; | |
1908 | ||
1909 | r = grep_source(opt, &gs); | |
1910 | ||
1911 | grep_source_clear(&gs); | |
1912 | return r; | |
1913 | } | |
1914 | ||
1915 | void grep_source_init(struct grep_source *gs, enum grep_source_type type, | |
55c61688 NTND |
1916 | const char *name, const char *path, |
1917 | const void *identifier) | |
e1327023 JK |
1918 | { |
1919 | gs->type = type; | |
8c53f071 JK |
1920 | gs->name = xstrdup_or_null(name); |
1921 | gs->path = xstrdup_or_null(path); | |
e1327023 JK |
1922 | gs->buf = NULL; |
1923 | gs->size = 0; | |
94ad9d9e | 1924 | gs->driver = NULL; |
e1327023 JK |
1925 | |
1926 | switch (type) { | |
1927 | case GREP_SOURCE_FILE: | |
1928 | gs->identifier = xstrdup(identifier); | |
1929 | break; | |
4538eef5 BW |
1930 | case GREP_SOURCE_SUBMODULE: |
1931 | if (!identifier) { | |
1932 | gs->identifier = NULL; | |
1933 | break; | |
1934 | } | |
1935 | /* | |
1936 | * FALL THROUGH | |
1937 | * If the identifier is non-NULL (in the submodule case) it | |
1938 | * will be a SHA1 that needs to be copied. | |
1939 | */ | |
1c41c82b BW |
1940 | case GREP_SOURCE_OID: |
1941 | gs->identifier = oiddup(identifier); | |
e1327023 JK |
1942 | break; |
1943 | case GREP_SOURCE_BUF: | |
1944 | gs->identifier = NULL; | |
4538eef5 | 1945 | break; |
e1327023 JK |
1946 | } |
1947 | } | |
1948 | ||
1949 | void grep_source_clear(struct grep_source *gs) | |
1950 | { | |
88ce3ef6 ÆAB |
1951 | FREE_AND_NULL(gs->name); |
1952 | FREE_AND_NULL(gs->path); | |
1953 | FREE_AND_NULL(gs->identifier); | |
e1327023 JK |
1954 | grep_source_clear_data(gs); |
1955 | } | |
1956 | ||
1957 | void grep_source_clear_data(struct grep_source *gs) | |
1958 | { | |
1959 | switch (gs->type) { | |
1960 | case GREP_SOURCE_FILE: | |
1c41c82b | 1961 | case GREP_SOURCE_OID: |
4538eef5 | 1962 | case GREP_SOURCE_SUBMODULE: |
6a83d902 | 1963 | FREE_AND_NULL(gs->buf); |
e1327023 JK |
1964 | gs->size = 0; |
1965 | break; | |
1966 | case GREP_SOURCE_BUF: | |
1967 | /* leave user-provided buf intact */ | |
1968 | break; | |
1969 | } | |
1970 | } | |
1971 | ||
1c41c82b | 1972 | static int grep_source_load_oid(struct grep_source *gs) |
e1327023 JK |
1973 | { |
1974 | enum object_type type; | |
1975 | ||
1976 | grep_read_lock(); | |
1977 | gs->buf = read_sha1_file(gs->identifier, &type, &gs->size); | |
1978 | grep_read_unlock(); | |
1979 | ||
1980 | if (!gs->buf) | |
1981 | return error(_("'%s': unable to read %s"), | |
1982 | gs->name, | |
1c41c82b | 1983 | oid_to_hex(gs->identifier)); |
e1327023 JK |
1984 | return 0; |
1985 | } | |
1986 | ||
1987 | static int grep_source_load_file(struct grep_source *gs) | |
1988 | { | |
1989 | const char *filename = gs->identifier; | |
1990 | struct stat st; | |
1991 | char *data; | |
1992 | size_t size; | |
1993 | int i; | |
1994 | ||
1995 | if (lstat(filename, &st) < 0) { | |
1996 | err_ret: | |
1997 | if (errno != ENOENT) | |
7645d8f1 | 1998 | error_errno(_("failed to stat '%s'"), filename); |
e1327023 JK |
1999 | return -1; |
2000 | } | |
2001 | if (!S_ISREG(st.st_mode)) | |
2002 | return -1; | |
2003 | size = xsize_t(st.st_size); | |
2004 | i = open(filename, O_RDONLY); | |
2005 | if (i < 0) | |
2006 | goto err_ret; | |
3733e694 | 2007 | data = xmallocz(size); |
e1327023 | 2008 | if (st.st_size != read_in_full(i, data, size)) { |
7645d8f1 | 2009 | error_errno(_("'%s': short read"), filename); |
e1327023 JK |
2010 | close(i); |
2011 | free(data); | |
2012 | return -1; | |
2013 | } | |
2014 | close(i); | |
e1327023 JK |
2015 | |
2016 | gs->buf = data; | |
2017 | gs->size = size; | |
2018 | return 0; | |
2019 | } | |
2020 | ||
3083301e | 2021 | static int grep_source_load(struct grep_source *gs) |
e1327023 JK |
2022 | { |
2023 | if (gs->buf) | |
2024 | return 0; | |
2025 | ||
2026 | switch (gs->type) { | |
2027 | case GREP_SOURCE_FILE: | |
2028 | return grep_source_load_file(gs); | |
1c41c82b BW |
2029 | case GREP_SOURCE_OID: |
2030 | return grep_source_load_oid(gs); | |
e1327023 JK |
2031 | case GREP_SOURCE_BUF: |
2032 | return gs->buf ? 0 : -1; | |
4538eef5 BW |
2033 | case GREP_SOURCE_SUBMODULE: |
2034 | break; | |
e1327023 | 2035 | } |
4538eef5 | 2036 | die("BUG: invalid grep_source type to load"); |
0ab7befa | 2037 | } |
94ad9d9e JK |
2038 | |
2039 | void grep_source_load_driver(struct grep_source *gs) | |
2040 | { | |
2041 | if (gs->driver) | |
2042 | return; | |
2043 | ||
2044 | grep_attr_lock(); | |
55c61688 NTND |
2045 | if (gs->path) |
2046 | gs->driver = userdiff_find_by_path(gs->path); | |
94ad9d9e JK |
2047 | if (!gs->driver) |
2048 | gs->driver = userdiff_find_by_name("default"); | |
2049 | grep_attr_unlock(); | |
2050 | } | |
41b59bfc | 2051 | |
3083301e | 2052 | static int grep_source_is_binary(struct grep_source *gs) |
41b59bfc JK |
2053 | { |
2054 | grep_source_load_driver(gs); | |
2055 | if (gs->driver->binary != -1) | |
2056 | return gs->driver->binary; | |
2057 | ||
2058 | if (!grep_source_load(gs)) | |
2059 | return buffer_is_binary(gs->buf, gs->size); | |
2060 | ||
2061 | return 0; | |
2062 | } |