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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 | ||
2fff1e19 | 390 | p->pcre1_extra_info = pcre_study(p->pcre1_regexp, GIT_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; | |
a25b9085 ÆAB |
480 | int patinforet; |
481 | size_t jitsizearg; | |
94da9193 ÆAB |
482 | |
483 | assert(opt->pcre2); | |
484 | ||
485 | p->pcre2_compile_context = NULL; | |
486 | ||
487 | if (opt->ignore_case) { | |
488 | if (has_non_ascii(p->pattern)) { | |
489 | character_tables = pcre2_maketables(NULL); | |
490 | p->pcre2_compile_context = pcre2_compile_context_create(NULL); | |
491 | pcre2_set_character_tables(p->pcre2_compile_context, character_tables); | |
492 | } | |
493 | options |= PCRE2_CASELESS; | |
494 | } | |
495 | if (is_utf8_locale() && has_non_ascii(p->pattern)) | |
496 | options |= PCRE2_UTF; | |
497 | ||
498 | p->pcre2_pattern = pcre2_compile((PCRE2_SPTR)p->pattern, | |
499 | p->patternlen, options, &error, &erroffset, | |
500 | p->pcre2_compile_context); | |
501 | ||
502 | if (p->pcre2_pattern) { | |
503 | p->pcre2_match_data = pcre2_match_data_create_from_pattern(p->pcre2_pattern, NULL); | |
504 | if (!p->pcre2_match_data) | |
505 | die("Couldn't allocate PCRE2 match data"); | |
506 | } else { | |
507 | pcre2_get_error_message(error, errbuf, sizeof(errbuf)); | |
508 | compile_regexp_failed(p, (const char *)&errbuf); | |
509 | } | |
510 | ||
511 | pcre2_config(PCRE2_CONFIG_JIT, &p->pcre2_jit_on); | |
512 | if (p->pcre2_jit_on == 1) { | |
513 | jitret = pcre2_jit_compile(p->pcre2_pattern, PCRE2_JIT_COMPLETE); | |
514 | if (jitret) | |
515 | die("Couldn't JIT the PCRE2 pattern '%s', got '%d'\n", p->pattern, jitret); | |
a25b9085 ÆAB |
516 | |
517 | /* | |
518 | * The pcre2_config(PCRE2_CONFIG_JIT, ...) call just | |
519 | * tells us whether the library itself supports JIT, | |
520 | * but to see whether we're going to be actually using | |
521 | * JIT we need to extract PCRE2_INFO_JITSIZE from the | |
522 | * pattern *after* we do pcre2_jit_compile() above. | |
523 | * | |
524 | * This is because if the pattern contains the | |
525 | * (*NO_JIT) verb (see pcre2syntax(3)) | |
526 | * pcre2_jit_compile() will exit early with 0. If we | |
527 | * then proceed to call pcre2_jit_match() further down | |
528 | * the line instead of pcre2_match() we'll either | |
529 | * segfault (pre PCRE 10.31) or run into a fatal error | |
530 | * (post PCRE2 10.31) | |
531 | */ | |
532 | patinforet = pcre2_pattern_info(p->pcre2_pattern, PCRE2_INFO_JITSIZE, &jitsizearg); | |
533 | if (patinforet) | |
534 | BUG("pcre2_pattern_info() failed: %d", patinforet); | |
535 | if (jitsizearg == 0) { | |
536 | p->pcre2_jit_on = 0; | |
537 | return; | |
538 | } | |
539 | ||
94da9193 ÆAB |
540 | p->pcre2_jit_stack = pcre2_jit_stack_create(1, 1024 * 1024, NULL); |
541 | if (!p->pcre2_jit_stack) | |
542 | die("Couldn't allocate PCRE2 JIT stack"); | |
543 | p->pcre2_match_context = pcre2_match_context_create(NULL); | |
674ad936 | 544 | if (!p->pcre2_match_context) |
94da9193 ÆAB |
545 | die("Couldn't allocate PCRE2 match context"); |
546 | pcre2_jit_stack_assign(p->pcre2_match_context, NULL, p->pcre2_jit_stack); | |
547 | } else if (p->pcre2_jit_on != 0) { | |
548 | die("BUG: The pcre2_jit_on variable should be 0 or 1, not %d", | |
549 | p->pcre1_jit_on); | |
550 | } | |
551 | } | |
552 | ||
553 | static int pcre2match(struct grep_pat *p, const char *line, const char *eol, | |
554 | regmatch_t *match, int eflags) | |
555 | { | |
556 | int ret, flags = 0; | |
557 | PCRE2_SIZE *ovector; | |
558 | PCRE2_UCHAR errbuf[256]; | |
559 | ||
560 | if (eflags & REG_NOTBOL) | |
561 | flags |= PCRE2_NOTBOL; | |
562 | ||
563 | if (p->pcre2_jit_on) | |
564 | ret = pcre2_jit_match(p->pcre2_pattern, (unsigned char *)line, | |
565 | eol - line, 0, flags, p->pcre2_match_data, | |
566 | NULL); | |
567 | else | |
568 | ret = pcre2_match(p->pcre2_pattern, (unsigned char *)line, | |
569 | eol - line, 0, flags, p->pcre2_match_data, | |
570 | NULL); | |
571 | ||
572 | if (ret < 0 && ret != PCRE2_ERROR_NOMATCH) { | |
573 | pcre2_get_error_message(ret, errbuf, sizeof(errbuf)); | |
574 | die("%s failed with error code %d: %s", | |
575 | (p->pcre2_jit_on ? "pcre2_jit_match" : "pcre2_match"), ret, | |
576 | errbuf); | |
577 | } | |
578 | if (ret > 0) { | |
579 | ovector = pcre2_get_ovector_pointer(p->pcre2_match_data); | |
580 | ret = 0; | |
581 | match->rm_so = (int)ovector[0]; | |
582 | match->rm_eo = (int)ovector[1]; | |
583 | } | |
584 | ||
585 | return ret; | |
586 | } | |
587 | ||
588 | static void free_pcre2_pattern(struct grep_pat *p) | |
589 | { | |
590 | pcre2_compile_context_free(p->pcre2_compile_context); | |
591 | pcre2_code_free(p->pcre2_pattern); | |
592 | pcre2_match_data_free(p->pcre2_match_data); | |
593 | pcre2_jit_stack_free(p->pcre2_jit_stack); | |
594 | pcre2_match_context_free(p->pcre2_match_context); | |
595 | } | |
596 | #else /* !USE_LIBPCRE2 */ | |
597 | static void compile_pcre2_pattern(struct grep_pat *p, const struct grep_opt *opt) | |
598 | { | |
599 | /* | |
600 | * Unreachable until USE_LIBPCRE2 becomes synonymous with | |
601 | * USE_LIBPCRE. See the sibling comment in | |
602 | * grep_set_pattern_type_option(). | |
603 | */ | |
604 | die("cannot use Perl-compatible regexes when not compiled with USE_LIBPCRE"); | |
605 | } | |
606 | ||
607 | static int pcre2match(struct grep_pat *p, const char *line, const char *eol, | |
608 | regmatch_t *match, int eflags) | |
609 | { | |
610 | return 1; | |
611 | } | |
612 | ||
613 | static void free_pcre2_pattern(struct grep_pat *p) | |
614 | { | |
615 | } | |
616 | #endif /* !USE_LIBPCRE2 */ | |
617 | ||
793dc676 NTND |
618 | static void compile_fixed_regexp(struct grep_pat *p, struct grep_opt *opt) |
619 | { | |
620 | struct strbuf sb = STRBUF_INIT; | |
621 | int err; | |
1ceababc | 622 | int regflags = 0; |
793dc676 NTND |
623 | |
624 | basic_regex_quote_buf(&sb, p->pattern); | |
793dc676 NTND |
625 | if (opt->ignore_case) |
626 | regflags |= REG_ICASE; | |
627 | err = regcomp(&p->regexp, sb.buf, regflags); | |
628 | if (opt->debug) | |
629 | fprintf(stderr, "fixed %s\n", sb.buf); | |
630 | strbuf_release(&sb); | |
631 | if (err) { | |
632 | char errbuf[1024]; | |
633 | regerror(err, &p->regexp, errbuf, sizeof(errbuf)); | |
634 | regfree(&p->regexp); | |
635 | compile_regexp_failed(p, errbuf); | |
636 | } | |
637 | } | |
638 | ||
83b5d2f5 JH |
639 | static void compile_regexp(struct grep_pat *p, struct grep_opt *opt) |
640 | { | |
07a3d411 | 641 | int ascii_only; |
c822255c | 642 | int err; |
07a3d411 | 643 | int regflags = REG_NEWLINE; |
c822255c | 644 | |
d7eb527d | 645 | p->word_regexp = opt->word_regexp; |
5183bf67 | 646 | p->ignore_case = opt->ignore_case; |
5c1ebcca | 647 | ascii_only = !has_non_ascii(p->pattern); |
d7eb527d | 648 | |
793dc676 NTND |
649 | /* |
650 | * Even when -F (fixed) asks us to do a non-regexp search, we | |
651 | * may not be able to correctly case-fold when -i | |
652 | * (ignore-case) is asked (in which case, we'll synthesize a | |
653 | * regexp to match the pattern that matches regexp special | |
654 | * characters literally, while ignoring case differences). On | |
655 | * the other hand, even without -F, if the pattern does not | |
656 | * have any regexp special characters and there is no need for | |
657 | * case-folding search, we can internally turn it into a | |
658 | * simple string match using kws. p->fixed tells us if we | |
659 | * want to use kws. | |
660 | */ | |
219e65b6 ÆAB |
661 | if (opt->fixed || |
662 | has_null(p->pattern, p->patternlen) || | |
663 | is_fixed(p->pattern, p->patternlen)) | |
07a3d411 | 664 | p->fixed = !p->ignore_case || ascii_only; |
9eceddee FK |
665 | |
666 | if (p->fixed) { | |
07a3d411 | 667 | p->kws = kwsalloc(p->ignore_case ? tolower_trans_tbl : NULL); |
9eceddee FK |
668 | kwsincr(p->kws, p->pattern, p->patternlen); |
669 | kwsprep(p->kws); | |
c822255c | 670 | return; |
793dc676 NTND |
671 | } else if (opt->fixed) { |
672 | /* | |
673 | * We come here when the pattern has the non-ascii | |
674 | * characters we cannot case-fold, and asked to | |
675 | * ignore-case. | |
676 | */ | |
677 | compile_fixed_regexp(p, opt); | |
678 | return; | |
9eceddee | 679 | } |
c822255c | 680 | |
94da9193 ÆAB |
681 | if (opt->pcre2) { |
682 | compile_pcre2_pattern(p, opt); | |
683 | return; | |
684 | } | |
685 | ||
6d4b5747 ÆAB |
686 | if (opt->pcre1) { |
687 | compile_pcre1_regexp(p, opt); | |
63e7e9d8 MK |
688 | return; |
689 | } | |
690 | ||
07a3d411 ÆAB |
691 | if (p->ignore_case) |
692 | regflags |= REG_ICASE; | |
693 | if (opt->extended_regexp_option) | |
694 | regflags |= REG_EXTENDED; | |
695 | err = regcomp(&p->regexp, p->pattern, regflags); | |
83b5d2f5 JH |
696 | if (err) { |
697 | char errbuf[1024]; | |
83b5d2f5 JH |
698 | regerror(err, &p->regexp, errbuf, 1024); |
699 | regfree(&p->regexp); | |
a30c148a | 700 | compile_regexp_failed(p, errbuf); |
83b5d2f5 JH |
701 | } |
702 | } | |
703 | ||
0ab7befa | 704 | static struct grep_expr *compile_pattern_or(struct grep_pat **); |
83b5d2f5 JH |
705 | static struct grep_expr *compile_pattern_atom(struct grep_pat **list) |
706 | { | |
707 | struct grep_pat *p; | |
708 | struct grep_expr *x; | |
709 | ||
710 | p = *list; | |
c922b01f LT |
711 | if (!p) |
712 | return NULL; | |
83b5d2f5 JH |
713 | switch (p->token) { |
714 | case GREP_PATTERN: /* atom */ | |
480c1ca6 JH |
715 | case GREP_PATTERN_HEAD: |
716 | case GREP_PATTERN_BODY: | |
83b5d2f5 JH |
717 | x = xcalloc(1, sizeof (struct grep_expr)); |
718 | x->node = GREP_NODE_ATOM; | |
719 | x->u.atom = p; | |
720 | *list = p->next; | |
721 | return x; | |
722 | case GREP_OPEN_PAREN: | |
723 | *list = p->next; | |
0ab7befa | 724 | x = compile_pattern_or(list); |
83b5d2f5 JH |
725 | if (!*list || (*list)->token != GREP_CLOSE_PAREN) |
726 | die("unmatched parenthesis"); | |
727 | *list = (*list)->next; | |
728 | return x; | |
729 | default: | |
730 | return NULL; | |
731 | } | |
732 | } | |
733 | ||
734 | static struct grep_expr *compile_pattern_not(struct grep_pat **list) | |
735 | { | |
736 | struct grep_pat *p; | |
737 | struct grep_expr *x; | |
738 | ||
739 | p = *list; | |
c922b01f LT |
740 | if (!p) |
741 | return NULL; | |
83b5d2f5 JH |
742 | switch (p->token) { |
743 | case GREP_NOT: | |
744 | if (!p->next) | |
745 | die("--not not followed by pattern expression"); | |
746 | *list = p->next; | |
747 | x = xcalloc(1, sizeof (struct grep_expr)); | |
748 | x->node = GREP_NODE_NOT; | |
749 | x->u.unary = compile_pattern_not(list); | |
750 | if (!x->u.unary) | |
751 | die("--not followed by non pattern expression"); | |
752 | return x; | |
753 | default: | |
754 | return compile_pattern_atom(list); | |
755 | } | |
756 | } | |
757 | ||
758 | static struct grep_expr *compile_pattern_and(struct grep_pat **list) | |
759 | { | |
760 | struct grep_pat *p; | |
761 | struct grep_expr *x, *y, *z; | |
762 | ||
763 | x = compile_pattern_not(list); | |
764 | p = *list; | |
765 | if (p && p->token == GREP_AND) { | |
766 | if (!p->next) | |
767 | die("--and not followed by pattern expression"); | |
768 | *list = p->next; | |
769 | y = compile_pattern_and(list); | |
770 | if (!y) | |
771 | die("--and not followed by pattern expression"); | |
772 | z = xcalloc(1, sizeof (struct grep_expr)); | |
773 | z->node = GREP_NODE_AND; | |
774 | z->u.binary.left = x; | |
775 | z->u.binary.right = y; | |
776 | return z; | |
777 | } | |
778 | return x; | |
779 | } | |
780 | ||
781 | static struct grep_expr *compile_pattern_or(struct grep_pat **list) | |
782 | { | |
783 | struct grep_pat *p; | |
784 | struct grep_expr *x, *y, *z; | |
785 | ||
786 | x = compile_pattern_and(list); | |
787 | p = *list; | |
788 | if (x && p && p->token != GREP_CLOSE_PAREN) { | |
789 | y = compile_pattern_or(list); | |
790 | if (!y) | |
791 | die("not a pattern expression %s", p->pattern); | |
792 | z = xcalloc(1, sizeof (struct grep_expr)); | |
793 | z->node = GREP_NODE_OR; | |
794 | z->u.binary.left = x; | |
795 | z->u.binary.right = y; | |
796 | return z; | |
797 | } | |
798 | return x; | |
799 | } | |
800 | ||
801 | static struct grep_expr *compile_pattern_expr(struct grep_pat **list) | |
802 | { | |
803 | return compile_pattern_or(list); | |
804 | } | |
805 | ||
17bf35a3 JH |
806 | static void indent(int in) |
807 | { | |
808 | while (in-- > 0) | |
809 | fputc(' ', stderr); | |
810 | } | |
811 | ||
812 | static void dump_grep_pat(struct grep_pat *p) | |
813 | { | |
814 | switch (p->token) { | |
815 | case GREP_AND: fprintf(stderr, "*and*"); break; | |
816 | case GREP_OPEN_PAREN: fprintf(stderr, "*(*"); break; | |
817 | case GREP_CLOSE_PAREN: fprintf(stderr, "*)*"); break; | |
818 | case GREP_NOT: fprintf(stderr, "*not*"); break; | |
819 | case GREP_OR: fprintf(stderr, "*or*"); break; | |
820 | ||
821 | case GREP_PATTERN: fprintf(stderr, "pattern"); break; | |
822 | case GREP_PATTERN_HEAD: fprintf(stderr, "pattern_head"); break; | |
823 | case GREP_PATTERN_BODY: fprintf(stderr, "pattern_body"); break; | |
824 | } | |
825 | ||
826 | switch (p->token) { | |
827 | default: break; | |
828 | case GREP_PATTERN_HEAD: | |
829 | fprintf(stderr, "<head %d>", p->field); break; | |
830 | case GREP_PATTERN_BODY: | |
831 | fprintf(stderr, "<body>"); break; | |
832 | } | |
833 | switch (p->token) { | |
834 | default: break; | |
835 | case GREP_PATTERN_HEAD: | |
836 | case GREP_PATTERN_BODY: | |
837 | case GREP_PATTERN: | |
838 | fprintf(stderr, "%.*s", (int)p->patternlen, p->pattern); | |
839 | break; | |
840 | } | |
841 | fputc('\n', stderr); | |
842 | } | |
843 | ||
844 | static void dump_grep_expression_1(struct grep_expr *x, int in) | |
845 | { | |
846 | indent(in); | |
847 | switch (x->node) { | |
848 | case GREP_NODE_TRUE: | |
849 | fprintf(stderr, "true\n"); | |
850 | break; | |
851 | case GREP_NODE_ATOM: | |
852 | dump_grep_pat(x->u.atom); | |
853 | break; | |
854 | case GREP_NODE_NOT: | |
855 | fprintf(stderr, "(not\n"); | |
856 | dump_grep_expression_1(x->u.unary, in+1); | |
857 | indent(in); | |
858 | fprintf(stderr, ")\n"); | |
859 | break; | |
860 | case GREP_NODE_AND: | |
861 | fprintf(stderr, "(and\n"); | |
862 | dump_grep_expression_1(x->u.binary.left, in+1); | |
863 | dump_grep_expression_1(x->u.binary.right, in+1); | |
864 | indent(in); | |
865 | fprintf(stderr, ")\n"); | |
866 | break; | |
867 | case GREP_NODE_OR: | |
868 | fprintf(stderr, "(or\n"); | |
869 | dump_grep_expression_1(x->u.binary.left, in+1); | |
870 | dump_grep_expression_1(x->u.binary.right, in+1); | |
871 | indent(in); | |
872 | fprintf(stderr, ")\n"); | |
873 | break; | |
874 | } | |
875 | } | |
876 | ||
07a7d656 | 877 | static void dump_grep_expression(struct grep_opt *opt) |
17bf35a3 JH |
878 | { |
879 | struct grep_expr *x = opt->pattern_expression; | |
880 | ||
881 | if (opt->all_match) | |
882 | fprintf(stderr, "[all-match]\n"); | |
883 | dump_grep_expression_1(x, 0); | |
884 | fflush(NULL); | |
885 | } | |
886 | ||
5aaeb733 JH |
887 | static struct grep_expr *grep_true_expr(void) |
888 | { | |
889 | struct grep_expr *z = xcalloc(1, sizeof(*z)); | |
890 | z->node = GREP_NODE_TRUE; | |
891 | return z; | |
892 | } | |
893 | ||
894 | static struct grep_expr *grep_or_expr(struct grep_expr *left, struct grep_expr *right) | |
895 | { | |
896 | struct grep_expr *z = xcalloc(1, sizeof(*z)); | |
897 | z->node = GREP_NODE_OR; | |
898 | z->u.binary.left = left; | |
899 | z->u.binary.right = right; | |
900 | return z; | |
901 | } | |
902 | ||
95ce9ce2 | 903 | static struct grep_expr *prep_header_patterns(struct grep_opt *opt) |
83b5d2f5 JH |
904 | { |
905 | struct grep_pat *p; | |
95ce9ce2 | 906 | struct grep_expr *header_expr; |
5aaeb733 JH |
907 | struct grep_expr *(header_group[GREP_HEADER_FIELD_MAX]); |
908 | enum grep_header_field fld; | |
83b5d2f5 | 909 | |
95ce9ce2 JH |
910 | if (!opt->header_list) |
911 | return NULL; | |
2385f246 | 912 | |
95ce9ce2 JH |
913 | for (p = opt->header_list; p; p = p->next) { |
914 | if (p->token != GREP_PATTERN_HEAD) | |
ef1177d1 | 915 | die("BUG: a non-header pattern in grep header list."); |
3ce3ffb8 AP |
916 | if (p->field < GREP_HEADER_FIELD_MIN || |
917 | GREP_HEADER_FIELD_MAX <= p->field) | |
ef1177d1 | 918 | die("BUG: unknown header field %d", p->field); |
95ce9ce2 | 919 | compile_regexp(p, opt); |
80235ba7 | 920 | } |
5aaeb733 JH |
921 | |
922 | for (fld = 0; fld < GREP_HEADER_FIELD_MAX; fld++) | |
923 | header_group[fld] = NULL; | |
924 | ||
925 | for (p = opt->header_list; p; p = p->next) { | |
926 | struct grep_expr *h; | |
927 | struct grep_pat *pp = p; | |
928 | ||
929 | h = compile_pattern_atom(&pp); | |
930 | if (!h || pp != p->next) | |
ef1177d1 | 931 | die("BUG: malformed header expr"); |
5aaeb733 JH |
932 | if (!header_group[p->field]) { |
933 | header_group[p->field] = h; | |
934 | continue; | |
935 | } | |
936 | header_group[p->field] = grep_or_expr(h, header_group[p->field]); | |
937 | } | |
938 | ||
939 | header_expr = NULL; | |
940 | ||
941 | for (fld = 0; fld < GREP_HEADER_FIELD_MAX; fld++) { | |
942 | if (!header_group[fld]) | |
943 | continue; | |
944 | if (!header_expr) | |
945 | header_expr = grep_true_expr(); | |
946 | header_expr = grep_or_expr(header_group[fld], header_expr); | |
947 | } | |
95ce9ce2 JH |
948 | return header_expr; |
949 | } | |
950 | ||
13e4fc7e JH |
951 | static struct grep_expr *grep_splice_or(struct grep_expr *x, struct grep_expr *y) |
952 | { | |
953 | struct grep_expr *z = x; | |
954 | ||
955 | while (x) { | |
956 | assert(x->node == GREP_NODE_OR); | |
957 | if (x->u.binary.right && | |
958 | x->u.binary.right->node == GREP_NODE_TRUE) { | |
959 | x->u.binary.right = y; | |
960 | break; | |
961 | } | |
962 | x = x->u.binary.right; | |
963 | } | |
964 | return z; | |
965 | } | |
966 | ||
17bf35a3 | 967 | static void compile_grep_patterns_real(struct grep_opt *opt) |
95ce9ce2 JH |
968 | { |
969 | struct grep_pat *p; | |
970 | struct grep_expr *header_expr = prep_header_patterns(opt); | |
0ab7befa | 971 | |
83b5d2f5 | 972 | for (p = opt->pattern_list; p; p = p->next) { |
480c1ca6 JH |
973 | switch (p->token) { |
974 | case GREP_PATTERN: /* atom */ | |
975 | case GREP_PATTERN_HEAD: | |
976 | case GREP_PATTERN_BODY: | |
c822255c | 977 | compile_regexp(p, opt); |
480c1ca6 JH |
978 | break; |
979 | default: | |
83b5d2f5 | 980 | opt->extended = 1; |
480c1ca6 JH |
981 | break; |
982 | } | |
83b5d2f5 JH |
983 | } |
984 | ||
80235ba7 JH |
985 | if (opt->all_match || header_expr) |
986 | opt->extended = 1; | |
17bf35a3 | 987 | else if (!opt->extended && !opt->debug) |
83b5d2f5 JH |
988 | return; |
989 | ||
83b5d2f5 | 990 | p = opt->pattern_list; |
ba150a3f MB |
991 | if (p) |
992 | opt->pattern_expression = compile_pattern_expr(&p); | |
83b5d2f5 JH |
993 | if (p) |
994 | die("incomplete pattern expression: %s", p->pattern); | |
80235ba7 JH |
995 | |
996 | if (!header_expr) | |
997 | return; | |
998 | ||
5aaeb733 | 999 | if (!opt->pattern_expression) |
80235ba7 | 1000 | opt->pattern_expression = header_expr; |
13e4fc7e JH |
1001 | else if (opt->all_match) |
1002 | opt->pattern_expression = grep_splice_or(header_expr, | |
1003 | opt->pattern_expression); | |
5aaeb733 JH |
1004 | else |
1005 | opt->pattern_expression = grep_or_expr(opt->pattern_expression, | |
1006 | header_expr); | |
80235ba7 | 1007 | opt->all_match = 1; |
83b5d2f5 JH |
1008 | } |
1009 | ||
17bf35a3 JH |
1010 | void compile_grep_patterns(struct grep_opt *opt) |
1011 | { | |
1012 | compile_grep_patterns_real(opt); | |
1013 | if (opt->debug) | |
1014 | dump_grep_expression(opt); | |
1015 | } | |
1016 | ||
b48fb5b6 JH |
1017 | static void free_pattern_expr(struct grep_expr *x) |
1018 | { | |
1019 | switch (x->node) { | |
5aaeb733 | 1020 | case GREP_NODE_TRUE: |
b48fb5b6 JH |
1021 | case GREP_NODE_ATOM: |
1022 | break; | |
1023 | case GREP_NODE_NOT: | |
1024 | free_pattern_expr(x->u.unary); | |
1025 | break; | |
1026 | case GREP_NODE_AND: | |
1027 | case GREP_NODE_OR: | |
1028 | free_pattern_expr(x->u.binary.left); | |
1029 | free_pattern_expr(x->u.binary.right); | |
1030 | break; | |
1031 | } | |
1032 | free(x); | |
1033 | } | |
1034 | ||
1035 | void free_grep_patterns(struct grep_opt *opt) | |
1036 | { | |
1037 | struct grep_pat *p, *n; | |
1038 | ||
1039 | for (p = opt->pattern_list; p; p = n) { | |
1040 | n = p->next; | |
1041 | switch (p->token) { | |
1042 | case GREP_PATTERN: /* atom */ | |
1043 | case GREP_PATTERN_HEAD: | |
1044 | case GREP_PATTERN_BODY: | |
9eceddee FK |
1045 | if (p->kws) |
1046 | kwsfree(p->kws); | |
6d4b5747 ÆAB |
1047 | else if (p->pcre1_regexp) |
1048 | free_pcre1_regexp(p); | |
94da9193 ÆAB |
1049 | else if (p->pcre2_pattern) |
1050 | free_pcre2_pattern(p); | |
63e7e9d8 MK |
1051 | else |
1052 | regfree(&p->regexp); | |
526a858a | 1053 | free(p->pattern); |
b48fb5b6 JH |
1054 | break; |
1055 | default: | |
1056 | break; | |
1057 | } | |
1058 | free(p); | |
1059 | } | |
1060 | ||
1061 | if (!opt->extended) | |
1062 | return; | |
1063 | free_pattern_expr(opt->pattern_expression); | |
1064 | } | |
1065 | ||
83b5d2f5 JH |
1066 | static char *end_of_line(char *cp, unsigned long *left) |
1067 | { | |
1068 | unsigned long l = *left; | |
1069 | while (l && *cp != '\n') { | |
1070 | l--; | |
1071 | cp++; | |
1072 | } | |
1073 | *left = l; | |
1074 | return cp; | |
1075 | } | |
1076 | ||
1077 | static int word_char(char ch) | |
1078 | { | |
1079 | return isalnum(ch) || ch == '_'; | |
1080 | } | |
1081 | ||
55f638bd ML |
1082 | static void output_color(struct grep_opt *opt, const void *data, size_t size, |
1083 | const char *color) | |
1084 | { | |
daa0c3d9 | 1085 | if (want_color(opt->color) && color && color[0]) { |
55f638bd ML |
1086 | opt->output(opt, color, strlen(color)); |
1087 | opt->output(opt, data, size); | |
1088 | opt->output(opt, GIT_COLOR_RESET, strlen(GIT_COLOR_RESET)); | |
1089 | } else | |
1090 | opt->output(opt, data, size); | |
1091 | } | |
1092 | ||
1093 | static void output_sep(struct grep_opt *opt, char sign) | |
1094 | { | |
1095 | if (opt->null_following_name) | |
1096 | opt->output(opt, "\0", 1); | |
1097 | else | |
1098 | output_color(opt, &sign, 1, opt->color_sep); | |
1099 | } | |
1100 | ||
83caecca RZ |
1101 | static void show_name(struct grep_opt *opt, const char *name) |
1102 | { | |
55f638bd | 1103 | output_color(opt, name, strlen(name), opt->color_filename); |
5b594f45 | 1104 | opt->output(opt, opt->null_following_name ? "\0" : "\n", 1); |
83caecca RZ |
1105 | } |
1106 | ||
ed40a095 RS |
1107 | static int fixmatch(struct grep_pat *p, char *line, char *eol, |
1108 | regmatch_t *match) | |
83b5d2f5 | 1109 | { |
9eceddee FK |
1110 | struct kwsmatch kwsm; |
1111 | size_t offset = kwsexec(p->kws, line, eol - line, &kwsm); | |
1112 | if (offset == -1) { | |
83b5d2f5 JH |
1113 | match->rm_so = match->rm_eo = -1; |
1114 | return REG_NOMATCH; | |
9eceddee FK |
1115 | } else { |
1116 | match->rm_so = offset; | |
1117 | match->rm_eo = match->rm_so + kwsm.size[0]; | |
83b5d2f5 JH |
1118 | return 0; |
1119 | } | |
1120 | } | |
1121 | ||
97e77784 MK |
1122 | static int patmatch(struct grep_pat *p, char *line, char *eol, |
1123 | regmatch_t *match, int eflags) | |
1124 | { | |
1125 | int hit; | |
1126 | ||
1127 | if (p->fixed) | |
1128 | hit = !fixmatch(p, line, eol, match); | |
6d4b5747 ÆAB |
1129 | else if (p->pcre1_regexp) |
1130 | hit = !pcre1match(p, line, eol, match, eflags); | |
94da9193 ÆAB |
1131 | else if (p->pcre2_pattern) |
1132 | hit = !pcre2match(p, line, eol, match, eflags); | |
97e77784 | 1133 | else |
b7d36ffc JS |
1134 | hit = !regexec_buf(&p->regexp, line, eol - line, 1, match, |
1135 | eflags); | |
97e77784 MK |
1136 | |
1137 | return hit; | |
1138 | } | |
1139 | ||
a4d7d2c6 JH |
1140 | static int strip_timestamp(char *bol, char **eol_p) |
1141 | { | |
1142 | char *eol = *eol_p; | |
1143 | int ch; | |
1144 | ||
1145 | while (bol < --eol) { | |
1146 | if (*eol != '>') | |
1147 | continue; | |
1148 | *eol_p = ++eol; | |
1149 | ch = *eol; | |
1150 | *eol = '\0'; | |
1151 | return ch; | |
1152 | } | |
1153 | return 0; | |
1154 | } | |
1155 | ||
1156 | static struct { | |
1157 | const char *field; | |
1158 | size_t len; | |
1159 | } header_field[] = { | |
1160 | { "author ", 7 }, | |
1161 | { "committer ", 10 }, | |
72fd13f7 | 1162 | { "reflog ", 7 }, |
a4d7d2c6 JH |
1163 | }; |
1164 | ||
d7eb527d | 1165 | static int match_one_pattern(struct grep_pat *p, char *bol, char *eol, |
79212772 RS |
1166 | enum grep_context ctx, |
1167 | regmatch_t *pmatch, int eflags) | |
83b5d2f5 JH |
1168 | { |
1169 | int hit = 0; | |
a4d7d2c6 | 1170 | int saved_ch = 0; |
e701fadb | 1171 | const char *start = bol; |
83b5d2f5 | 1172 | |
480c1ca6 JH |
1173 | if ((p->token != GREP_PATTERN) && |
1174 | ((p->token == GREP_PATTERN_HEAD) != (ctx == GREP_CONTEXT_HEAD))) | |
1175 | return 0; | |
1176 | ||
a4d7d2c6 JH |
1177 | if (p->token == GREP_PATTERN_HEAD) { |
1178 | const char *field; | |
1179 | size_t len; | |
1180 | assert(p->field < ARRAY_SIZE(header_field)); | |
1181 | field = header_field[p->field].field; | |
1182 | len = header_field[p->field].len; | |
1183 | if (strncmp(bol, field, len)) | |
1184 | return 0; | |
1185 | bol += len; | |
ad4813b3 NTND |
1186 | switch (p->field) { |
1187 | case GREP_HEADER_AUTHOR: | |
1188 | case GREP_HEADER_COMMITTER: | |
1189 | saved_ch = strip_timestamp(bol, &eol); | |
1190 | break; | |
1191 | default: | |
1192 | break; | |
1193 | } | |
a4d7d2c6 JH |
1194 | } |
1195 | ||
83b5d2f5 | 1196 | again: |
97e77784 | 1197 | hit = patmatch(p, bol, eol, pmatch, eflags); |
83b5d2f5 | 1198 | |
d7eb527d | 1199 | if (hit && p->word_regexp) { |
83b5d2f5 | 1200 | if ((pmatch[0].rm_so < 0) || |
84201eae | 1201 | (eol - bol) < pmatch[0].rm_so || |
83b5d2f5 JH |
1202 | (pmatch[0].rm_eo < 0) || |
1203 | (eol - bol) < pmatch[0].rm_eo) | |
1204 | die("regexp returned nonsense"); | |
1205 | ||
1206 | /* Match beginning must be either beginning of the | |
1207 | * line, or at word boundary (i.e. the last char must | |
1208 | * not be a word char). Similarly, match end must be | |
1209 | * either end of the line, or at word boundary | |
1210 | * (i.e. the next char must not be a word char). | |
1211 | */ | |
fb62eb7f | 1212 | if ( ((pmatch[0].rm_so == 0) || |
83b5d2f5 JH |
1213 | !word_char(bol[pmatch[0].rm_so-1])) && |
1214 | ((pmatch[0].rm_eo == (eol-bol)) || | |
1215 | !word_char(bol[pmatch[0].rm_eo])) ) | |
1216 | ; | |
1217 | else | |
1218 | hit = 0; | |
1219 | ||
84201eae RS |
1220 | /* Words consist of at least one character. */ |
1221 | if (pmatch->rm_so == pmatch->rm_eo) | |
1222 | hit = 0; | |
1223 | ||
83b5d2f5 JH |
1224 | if (!hit && pmatch[0].rm_so + bol + 1 < eol) { |
1225 | /* There could be more than one match on the | |
1226 | * line, and the first match might not be | |
1227 | * strict word match. But later ones could be! | |
fb62eb7f RS |
1228 | * Forward to the next possible start, i.e. the |
1229 | * next position following a non-word char. | |
83b5d2f5 JH |
1230 | */ |
1231 | bol = pmatch[0].rm_so + bol + 1; | |
fb62eb7f RS |
1232 | while (word_char(bol[-1]) && bol < eol) |
1233 | bol++; | |
dbb6a4ad | 1234 | eflags |= REG_NOTBOL; |
fb62eb7f RS |
1235 | if (bol < eol) |
1236 | goto again; | |
83b5d2f5 JH |
1237 | } |
1238 | } | |
a4d7d2c6 JH |
1239 | if (p->token == GREP_PATTERN_HEAD && saved_ch) |
1240 | *eol = saved_ch; | |
e701fadb RS |
1241 | if (hit) { |
1242 | pmatch[0].rm_so += bol - start; | |
1243 | pmatch[0].rm_eo += bol - start; | |
1244 | } | |
83b5d2f5 JH |
1245 | return hit; |
1246 | } | |
1247 | ||
d7eb527d RS |
1248 | static int match_expr_eval(struct grep_expr *x, char *bol, char *eol, |
1249 | enum grep_context ctx, int collect_hits) | |
83b5d2f5 | 1250 | { |
0ab7befa | 1251 | int h = 0; |
79212772 | 1252 | regmatch_t match; |
0ab7befa | 1253 | |
c922b01f LT |
1254 | if (!x) |
1255 | die("Not a valid grep expression"); | |
83b5d2f5 | 1256 | switch (x->node) { |
5aaeb733 JH |
1257 | case GREP_NODE_TRUE: |
1258 | h = 1; | |
1259 | break; | |
83b5d2f5 | 1260 | case GREP_NODE_ATOM: |
79212772 | 1261 | h = match_one_pattern(x->u.atom, bol, eol, ctx, &match, 0); |
83b5d2f5 JH |
1262 | break; |
1263 | case GREP_NODE_NOT: | |
d7eb527d | 1264 | h = !match_expr_eval(x->u.unary, bol, eol, ctx, 0); |
0ab7befa | 1265 | break; |
83b5d2f5 | 1266 | case GREP_NODE_AND: |
d7eb527d | 1267 | if (!match_expr_eval(x->u.binary.left, bol, eol, ctx, 0)) |
252d560d | 1268 | return 0; |
d7eb527d | 1269 | h = match_expr_eval(x->u.binary.right, bol, eol, ctx, 0); |
0ab7befa | 1270 | break; |
83b5d2f5 | 1271 | case GREP_NODE_OR: |
0ab7befa | 1272 | if (!collect_hits) |
d7eb527d | 1273 | return (match_expr_eval(x->u.binary.left, |
0ab7befa | 1274 | bol, eol, ctx, 0) || |
d7eb527d | 1275 | match_expr_eval(x->u.binary.right, |
0ab7befa | 1276 | bol, eol, ctx, 0)); |
d7eb527d | 1277 | h = match_expr_eval(x->u.binary.left, bol, eol, ctx, 0); |
0ab7befa | 1278 | x->u.binary.left->hit |= h; |
d7eb527d | 1279 | h |= match_expr_eval(x->u.binary.right, bol, eol, ctx, 1); |
0ab7befa JH |
1280 | break; |
1281 | default: | |
d7530708 | 1282 | die("Unexpected node type (internal error) %d", x->node); |
83b5d2f5 | 1283 | } |
0ab7befa JH |
1284 | if (collect_hits) |
1285 | x->hit |= h; | |
1286 | return h; | |
83b5d2f5 JH |
1287 | } |
1288 | ||
480c1ca6 | 1289 | static int match_expr(struct grep_opt *opt, char *bol, char *eol, |
0ab7befa | 1290 | enum grep_context ctx, int collect_hits) |
83b5d2f5 JH |
1291 | { |
1292 | struct grep_expr *x = opt->pattern_expression; | |
d7eb527d | 1293 | return match_expr_eval(x, bol, eol, ctx, collect_hits); |
83b5d2f5 JH |
1294 | } |
1295 | ||
480c1ca6 | 1296 | static int match_line(struct grep_opt *opt, char *bol, char *eol, |
0ab7befa | 1297 | enum grep_context ctx, int collect_hits) |
83b5d2f5 JH |
1298 | { |
1299 | struct grep_pat *p; | |
79212772 RS |
1300 | regmatch_t match; |
1301 | ||
83b5d2f5 | 1302 | if (opt->extended) |
0ab7befa JH |
1303 | return match_expr(opt, bol, eol, ctx, collect_hits); |
1304 | ||
1305 | /* we do not call with collect_hits without being extended */ | |
83b5d2f5 | 1306 | for (p = opt->pattern_list; p; p = p->next) { |
79212772 | 1307 | if (match_one_pattern(p, bol, eol, ctx, &match, 0)) |
83b5d2f5 JH |
1308 | return 1; |
1309 | } | |
1310 | return 0; | |
1311 | } | |
1312 | ||
7e8f59d5 RS |
1313 | static int match_next_pattern(struct grep_pat *p, char *bol, char *eol, |
1314 | enum grep_context ctx, | |
1315 | regmatch_t *pmatch, int eflags) | |
1316 | { | |
1317 | regmatch_t match; | |
1318 | ||
1319 | if (!match_one_pattern(p, bol, eol, ctx, &match, eflags)) | |
1320 | return 0; | |
1321 | if (match.rm_so < 0 || match.rm_eo < 0) | |
1322 | return 0; | |
1323 | if (pmatch->rm_so >= 0 && pmatch->rm_eo >= 0) { | |
1324 | if (match.rm_so > pmatch->rm_so) | |
1325 | return 1; | |
1326 | if (match.rm_so == pmatch->rm_so && match.rm_eo < pmatch->rm_eo) | |
1327 | return 1; | |
1328 | } | |
1329 | pmatch->rm_so = match.rm_so; | |
1330 | pmatch->rm_eo = match.rm_eo; | |
1331 | return 1; | |
1332 | } | |
1333 | ||
1334 | static int next_match(struct grep_opt *opt, char *bol, char *eol, | |
1335 | enum grep_context ctx, regmatch_t *pmatch, int eflags) | |
1336 | { | |
1337 | struct grep_pat *p; | |
1338 | int hit = 0; | |
1339 | ||
1340 | pmatch->rm_so = pmatch->rm_eo = -1; | |
1341 | if (bol < eol) { | |
1342 | for (p = opt->pattern_list; p; p = p->next) { | |
1343 | switch (p->token) { | |
1344 | case GREP_PATTERN: /* atom */ | |
1345 | case GREP_PATTERN_HEAD: | |
1346 | case GREP_PATTERN_BODY: | |
1347 | hit |= match_next_pattern(p, bol, eol, ctx, | |
1348 | pmatch, eflags); | |
1349 | break; | |
1350 | default: | |
1351 | break; | |
1352 | } | |
1353 | } | |
1354 | } | |
1355 | return hit; | |
1356 | } | |
1357 | ||
1358 | static void show_line(struct grep_opt *opt, char *bol, char *eol, | |
1359 | const char *name, unsigned lno, char sign) | |
1360 | { | |
1361 | int rest = eol - bol; | |
79a77109 | 1362 | const char *match_color, *line_color = NULL; |
7e8f59d5 | 1363 | |
a8f0e764 RS |
1364 | if (opt->file_break && opt->last_shown == 0) { |
1365 | if (opt->show_hunk_mark) | |
1366 | opt->output(opt, "\n", 1); | |
ba8ea749 | 1367 | } else if (opt->pre_context || opt->post_context || opt->funcbody) { |
046802d0 | 1368 | if (opt->last_shown == 0) { |
55f638bd ML |
1369 | if (opt->show_hunk_mark) { |
1370 | output_color(opt, "--", 2, opt->color_sep); | |
1371 | opt->output(opt, "\n", 1); | |
07b838f0 | 1372 | } |
55f638bd ML |
1373 | } else if (lno > opt->last_shown + 1) { |
1374 | output_color(opt, "--", 2, opt->color_sep); | |
1375 | opt->output(opt, "\n", 1); | |
1376 | } | |
5dd06d38 | 1377 | } |
1d84f72e RS |
1378 | if (opt->heading && opt->last_shown == 0) { |
1379 | output_color(opt, name, strlen(name), opt->color_filename); | |
1380 | opt->output(opt, "\n", 1); | |
1381 | } | |
5dd06d38 RS |
1382 | opt->last_shown = lno; |
1383 | ||
1d84f72e | 1384 | if (!opt->heading && opt->pathname) { |
55f638bd ML |
1385 | output_color(opt, name, strlen(name), opt->color_filename); |
1386 | output_sep(opt, sign); | |
5b594f45 FK |
1387 | } |
1388 | if (opt->linenum) { | |
1389 | char buf[32]; | |
1a168e5c | 1390 | xsnprintf(buf, sizeof(buf), "%d", lno); |
55f638bd ML |
1391 | output_color(opt, buf, strlen(buf), opt->color_lineno); |
1392 | output_sep(opt, sign); | |
5b594f45 | 1393 | } |
7e8f59d5 RS |
1394 | if (opt->color) { |
1395 | regmatch_t match; | |
1396 | enum grep_context ctx = GREP_CONTEXT_BODY; | |
1397 | int ch = *eol; | |
1398 | int eflags = 0; | |
1399 | ||
79a77109 RS |
1400 | if (sign == ':') |
1401 | match_color = opt->color_match_selected; | |
1402 | else | |
1403 | match_color = opt->color_match_context; | |
00588bb5 ML |
1404 | if (sign == ':') |
1405 | line_color = opt->color_selected; | |
1406 | else if (sign == '-') | |
1407 | line_color = opt->color_context; | |
1408 | else if (sign == '=') | |
1409 | line_color = opt->color_function; | |
7e8f59d5 RS |
1410 | *eol = '\0'; |
1411 | while (next_match(opt, bol, eol, ctx, &match, eflags)) { | |
1f5b9cc4 RS |
1412 | if (match.rm_so == match.rm_eo) |
1413 | break; | |
5b594f45 | 1414 | |
00588bb5 | 1415 | output_color(opt, bol, match.rm_so, line_color); |
55f638bd | 1416 | output_color(opt, bol + match.rm_so, |
79a77109 | 1417 | match.rm_eo - match.rm_so, match_color); |
7e8f59d5 RS |
1418 | bol += match.rm_eo; |
1419 | rest -= match.rm_eo; | |
1420 | eflags = REG_NOTBOL; | |
1421 | } | |
1422 | *eol = ch; | |
1423 | } | |
00588bb5 | 1424 | output_color(opt, bol, rest, line_color); |
5b594f45 | 1425 | opt->output(opt, "\n", 1); |
7e8f59d5 RS |
1426 | } |
1427 | ||
0579f91d | 1428 | #ifndef NO_PTHREADS |
78db6ea9 JK |
1429 | int grep_use_locks; |
1430 | ||
0579f91d TR |
1431 | /* |
1432 | * This lock protects access to the gitattributes machinery, which is | |
1433 | * not thread-safe. | |
1434 | */ | |
1435 | pthread_mutex_t grep_attr_mutex; | |
1436 | ||
78db6ea9 | 1437 | static inline void grep_attr_lock(void) |
0579f91d | 1438 | { |
78db6ea9 | 1439 | if (grep_use_locks) |
0579f91d TR |
1440 | pthread_mutex_lock(&grep_attr_mutex); |
1441 | } | |
1442 | ||
78db6ea9 | 1443 | static inline void grep_attr_unlock(void) |
0579f91d | 1444 | { |
78db6ea9 | 1445 | if (grep_use_locks) |
0579f91d TR |
1446 | pthread_mutex_unlock(&grep_attr_mutex); |
1447 | } | |
b3aeb285 JK |
1448 | |
1449 | /* | |
1450 | * Same as git_attr_mutex, but protecting the thread-unsafe object db access. | |
1451 | */ | |
1452 | pthread_mutex_t grep_read_mutex; | |
1453 | ||
0579f91d | 1454 | #else |
78db6ea9 JK |
1455 | #define grep_attr_lock() |
1456 | #define grep_attr_unlock() | |
0579f91d TR |
1457 | #endif |
1458 | ||
e1327023 | 1459 | static int match_funcname(struct grep_opt *opt, struct grep_source *gs, char *bol, char *eol) |
2944e4e6 | 1460 | { |
60ecac98 | 1461 | xdemitconf_t *xecfg = opt->priv; |
0579f91d | 1462 | if (xecfg && !xecfg->find_func) { |
94ad9d9e JK |
1463 | grep_source_load_driver(gs); |
1464 | if (gs->driver->funcname.pattern) { | |
1465 | const struct userdiff_funcname *pe = &gs->driver->funcname; | |
0579f91d TR |
1466 | xdiff_set_find_func(xecfg, pe->pattern, pe->cflags); |
1467 | } else { | |
1468 | xecfg = opt->priv = NULL; | |
1469 | } | |
1470 | } | |
1471 | ||
1472 | if (xecfg) { | |
60ecac98 RS |
1473 | char buf[1]; |
1474 | return xecfg->find_func(bol, eol - bol, buf, 1, | |
1475 | xecfg->find_func_priv) >= 0; | |
1476 | } | |
1477 | ||
2944e4e6 RS |
1478 | if (bol == eol) |
1479 | return 0; | |
1480 | if (isalpha(*bol) || *bol == '_' || *bol == '$') | |
1481 | return 1; | |
1482 | return 0; | |
1483 | } | |
1484 | ||
e1327023 JK |
1485 | static void show_funcname_line(struct grep_opt *opt, struct grep_source *gs, |
1486 | char *bol, unsigned lno) | |
2944e4e6 | 1487 | { |
e1327023 | 1488 | while (bol > gs->buf) { |
2944e4e6 RS |
1489 | char *eol = --bol; |
1490 | ||
e1327023 | 1491 | while (bol > gs->buf && bol[-1] != '\n') |
2944e4e6 RS |
1492 | bol--; |
1493 | lno--; | |
1494 | ||
1495 | if (lno <= opt->last_shown) | |
1496 | break; | |
1497 | ||
e1327023 JK |
1498 | if (match_funcname(opt, gs, bol, eol)) { |
1499 | show_line(opt, bol, eol, gs->name, lno, '='); | |
2944e4e6 RS |
1500 | break; |
1501 | } | |
1502 | } | |
1503 | } | |
1504 | ||
a5dc20b0 RS |
1505 | static int is_empty_line(const char *bol, const char *eol); |
1506 | ||
e1327023 | 1507 | static void show_pre_context(struct grep_opt *opt, struct grep_source *gs, |
ba8ea749 | 1508 | char *bol, char *end, unsigned lno) |
49de3216 | 1509 | { |
6653a01b | 1510 | unsigned cur = lno, from = 1, funcname_lno = 0, orig_from; |
a5dc20b0 | 1511 | int funcname_needed = !!opt->funcname, comment_needed = 0; |
ba8ea749 | 1512 | |
49de3216 RS |
1513 | if (opt->pre_context < lno) |
1514 | from = lno - opt->pre_context; | |
1515 | if (from <= opt->last_shown) | |
1516 | from = opt->last_shown + 1; | |
6653a01b | 1517 | orig_from = from; |
a5dc20b0 RS |
1518 | if (opt->funcbody) { |
1519 | if (match_funcname(opt, gs, bol, end)) | |
1520 | comment_needed = 1; | |
1521 | else | |
1522 | funcname_needed = 1; | |
6653a01b RS |
1523 | from = opt->last_shown + 1; |
1524 | } | |
49de3216 RS |
1525 | |
1526 | /* Rewind. */ | |
6653a01b | 1527 | while (bol > gs->buf && cur > from) { |
a5dc20b0 | 1528 | char *next_bol = bol; |
2944e4e6 RS |
1529 | char *eol = --bol; |
1530 | ||
e1327023 | 1531 | while (bol > gs->buf && bol[-1] != '\n') |
49de3216 RS |
1532 | bol--; |
1533 | cur--; | |
a5dc20b0 RS |
1534 | if (comment_needed && (is_empty_line(bol, eol) || |
1535 | match_funcname(opt, gs, bol, eol))) { | |
1536 | comment_needed = 0; | |
1537 | from = orig_from; | |
1538 | if (cur < from) { | |
1539 | cur++; | |
1540 | bol = next_bol; | |
1541 | break; | |
1542 | } | |
1543 | } | |
e1327023 | 1544 | if (funcname_needed && match_funcname(opt, gs, bol, eol)) { |
2944e4e6 RS |
1545 | funcname_lno = cur; |
1546 | funcname_needed = 0; | |
a5dc20b0 RS |
1547 | if (opt->funcbody) |
1548 | comment_needed = 1; | |
1549 | else | |
1550 | from = orig_from; | |
2944e4e6 | 1551 | } |
49de3216 RS |
1552 | } |
1553 | ||
2944e4e6 RS |
1554 | /* We need to look even further back to find a function signature. */ |
1555 | if (opt->funcname && funcname_needed) | |
e1327023 | 1556 | show_funcname_line(opt, gs, bol, cur); |
2944e4e6 | 1557 | |
49de3216 RS |
1558 | /* Back forward. */ |
1559 | while (cur < lno) { | |
2944e4e6 | 1560 | char *eol = bol, sign = (cur == funcname_lno) ? '=' : '-'; |
49de3216 RS |
1561 | |
1562 | while (*eol != '\n') | |
1563 | eol++; | |
e1327023 | 1564 | show_line(opt, bol, eol, gs->name, cur, sign); |
49de3216 RS |
1565 | bol = eol + 1; |
1566 | cur++; | |
1567 | } | |
1568 | } | |
1569 | ||
a26345b6 JH |
1570 | static int should_lookahead(struct grep_opt *opt) |
1571 | { | |
1572 | struct grep_pat *p; | |
1573 | ||
1574 | if (opt->extended) | |
1575 | return 0; /* punt for too complex stuff */ | |
1576 | if (opt->invert) | |
1577 | return 0; | |
1578 | for (p = opt->pattern_list; p; p = p->next) { | |
1579 | if (p->token != GREP_PATTERN) | |
1580 | return 0; /* punt for "header only" and stuff */ | |
1581 | } | |
1582 | return 1; | |
1583 | } | |
1584 | ||
1585 | static int look_ahead(struct grep_opt *opt, | |
1586 | unsigned long *left_p, | |
1587 | unsigned *lno_p, | |
1588 | char **bol_p) | |
1589 | { | |
1590 | unsigned lno = *lno_p; | |
1591 | char *bol = *bol_p; | |
1592 | struct grep_pat *p; | |
1593 | char *sp, *last_bol; | |
1594 | regoff_t earliest = -1; | |
1595 | ||
1596 | for (p = opt->pattern_list; p; p = p->next) { | |
1597 | int hit; | |
1598 | regmatch_t m; | |
1599 | ||
97e77784 | 1600 | hit = patmatch(p, bol, bol + *left_p, &m, 0); |
a26345b6 JH |
1601 | if (!hit || m.rm_so < 0 || m.rm_eo < 0) |
1602 | continue; | |
1603 | if (earliest < 0 || m.rm_so < earliest) | |
1604 | earliest = m.rm_so; | |
1605 | } | |
1606 | ||
1607 | if (earliest < 0) { | |
1608 | *bol_p = bol + *left_p; | |
1609 | *left_p = 0; | |
1610 | return 1; | |
1611 | } | |
1612 | for (sp = bol + earliest; bol < sp && sp[-1] != '\n'; sp--) | |
1613 | ; /* find the beginning of the line */ | |
1614 | last_bol = sp; | |
1615 | ||
1616 | for (sp = bol; sp < last_bol; sp++) { | |
1617 | if (*sp == '\n') | |
1618 | lno++; | |
1619 | } | |
1620 | *left_p -= last_bol - bol; | |
1621 | *bol_p = last_bol; | |
1622 | *lno_p = lno; | |
1623 | return 0; | |
1624 | } | |
1625 | ||
335ec3bf JK |
1626 | static int fill_textconv_grep(struct userdiff_driver *driver, |
1627 | struct grep_source *gs) | |
1628 | { | |
1629 | struct diff_filespec *df; | |
1630 | char *buf; | |
1631 | size_t size; | |
1632 | ||
1633 | if (!driver || !driver->textconv) | |
1634 | return grep_source_load(gs); | |
1635 | ||
1636 | /* | |
1637 | * The textconv interface is intimately tied to diff_filespecs, so we | |
1638 | * have to pretend to be one. If we could unify the grep_source | |
1639 | * and diff_filespec structs, this mess could just go away. | |
1640 | */ | |
1641 | df = alloc_filespec(gs->path); | |
1642 | switch (gs->type) { | |
1c41c82b | 1643 | case GREP_SOURCE_OID: |
335ec3bf JK |
1644 | fill_filespec(df, gs->identifier, 1, 0100644); |
1645 | break; | |
1646 | case GREP_SOURCE_FILE: | |
f9704c2d | 1647 | fill_filespec(df, &null_oid, 0, 0100644); |
335ec3bf JK |
1648 | break; |
1649 | default: | |
1650 | die("BUG: attempt to textconv something without a path?"); | |
1651 | } | |
1652 | ||
1653 | /* | |
1654 | * fill_textconv is not remotely thread-safe; it may load objects | |
1655 | * behind the scenes, and it modifies the global diff tempfile | |
1656 | * structure. | |
1657 | */ | |
1658 | grep_read_lock(); | |
1659 | size = fill_textconv(driver, df, &buf); | |
1660 | grep_read_unlock(); | |
1661 | free_filespec(df); | |
1662 | ||
1663 | /* | |
1664 | * The normal fill_textconv usage by the diff machinery would just keep | |
1665 | * the textconv'd buf separate from the diff_filespec. But much of the | |
1666 | * grep code passes around a grep_source and assumes that its "buf" | |
1667 | * pointer is the beginning of the thing we are searching. So let's | |
1668 | * install our textconv'd version into the grep_source, taking care not | |
1669 | * to leak any existing buffer. | |
1670 | */ | |
1671 | grep_source_clear_data(gs); | |
1672 | gs->buf = buf; | |
1673 | gs->size = size; | |
1674 | ||
1675 | return 0; | |
1676 | } | |
1677 | ||
4aa2c475 RS |
1678 | static int is_empty_line(const char *bol, const char *eol) |
1679 | { | |
1680 | while (bol < eol && isspace(*bol)) | |
1681 | bol++; | |
1682 | return bol == eol; | |
1683 | } | |
1684 | ||
e1327023 | 1685 | static int grep_source_1(struct grep_opt *opt, struct grep_source *gs, int collect_hits) |
83b5d2f5 | 1686 | { |
e1327023 | 1687 | char *bol; |
4aa2c475 | 1688 | char *peek_bol = NULL; |
e1327023 | 1689 | unsigned long left; |
83b5d2f5 | 1690 | unsigned lno = 1; |
83b5d2f5 | 1691 | unsigned last_hit = 0; |
83b5d2f5 | 1692 | int binary_match_only = 0; |
83b5d2f5 | 1693 | unsigned count = 0; |
a26345b6 | 1694 | int try_lookahead = 0; |
ba8ea749 | 1695 | int show_function = 0; |
335ec3bf | 1696 | struct userdiff_driver *textconv = NULL; |
480c1ca6 | 1697 | enum grep_context ctx = GREP_CONTEXT_HEAD; |
60ecac98 | 1698 | xdemitconf_t xecfg; |
83b5d2f5 | 1699 | |
5b594f45 FK |
1700 | if (!opt->output) |
1701 | opt->output = std_output; | |
1702 | ||
ba8ea749 RS |
1703 | if (opt->pre_context || opt->post_context || opt->file_break || |
1704 | opt->funcbody) { | |
08303c36 RS |
1705 | /* Show hunk marks, except for the first file. */ |
1706 | if (opt->last_shown) | |
1707 | opt->show_hunk_mark = 1; | |
1708 | /* | |
1709 | * If we're using threads then we can't easily identify | |
1710 | * the first file. Always put hunk marks in that case | |
1711 | * and skip the very first one later in work_done(). | |
1712 | */ | |
1713 | if (opt->output != std_output) | |
1714 | opt->show_hunk_mark = 1; | |
1715 | } | |
431d6e7b RS |
1716 | opt->last_shown = 0; |
1717 | ||
335ec3bf JK |
1718 | if (opt->allow_textconv) { |
1719 | grep_source_load_driver(gs); | |
1720 | /* | |
1721 | * We might set up the shared textconv cache data here, which | |
1722 | * is not thread-safe. | |
1723 | */ | |
1724 | grep_attr_lock(); | |
1725 | textconv = userdiff_get_textconv(gs->driver); | |
1726 | grep_attr_unlock(); | |
1727 | } | |
1728 | ||
1729 | /* | |
1730 | * We know the result of a textconv is text, so we only have to care | |
1731 | * about binary handling if we are not using it. | |
1732 | */ | |
1733 | if (!textconv) { | |
1734 | switch (opt->binary) { | |
1735 | case GREP_BINARY_DEFAULT: | |
1736 | if (grep_source_is_binary(gs)) | |
1737 | binary_match_only = 1; | |
1738 | break; | |
1739 | case GREP_BINARY_NOMATCH: | |
1740 | if (grep_source_is_binary(gs)) | |
1741 | return 0; /* Assume unmatch */ | |
1742 | break; | |
1743 | case GREP_BINARY_TEXT: | |
1744 | break; | |
1745 | default: | |
ef1177d1 | 1746 | die("BUG: unknown binary handling mode"); |
335ec3bf | 1747 | } |
83b5d2f5 JH |
1748 | } |
1749 | ||
60ecac98 | 1750 | memset(&xecfg, 0, sizeof(xecfg)); |
0579f91d TR |
1751 | opt->priv = &xecfg; |
1752 | ||
a26345b6 | 1753 | try_lookahead = should_lookahead(opt); |
60ecac98 | 1754 | |
335ec3bf | 1755 | if (fill_textconv_grep(textconv, gs) < 0) |
08265798 JK |
1756 | return 0; |
1757 | ||
e1327023 JK |
1758 | bol = gs->buf; |
1759 | left = gs->size; | |
83b5d2f5 JH |
1760 | while (left) { |
1761 | char *eol, ch; | |
0ab7befa | 1762 | int hit; |
83b5d2f5 | 1763 | |
a26345b6 | 1764 | /* |
8997da38 | 1765 | * look_ahead() skips quickly to the line that possibly |
a26345b6 JH |
1766 | * has the next hit; don't call it if we need to do |
1767 | * something more than just skipping the current line | |
1768 | * in response to an unmatch for the current line. E.g. | |
1769 | * inside a post-context window, we will show the current | |
1770 | * line as a context around the previous hit when it | |
1771 | * doesn't hit. | |
1772 | */ | |
1773 | if (try_lookahead | |
1774 | && !(last_hit | |
ba8ea749 RS |
1775 | && (show_function || |
1776 | lno <= last_hit + opt->post_context)) | |
a26345b6 JH |
1777 | && look_ahead(opt, &left, &lno, &bol)) |
1778 | break; | |
83b5d2f5 JH |
1779 | eol = end_of_line(bol, &left); |
1780 | ch = *eol; | |
1781 | *eol = 0; | |
1782 | ||
480c1ca6 JH |
1783 | if ((ctx == GREP_CONTEXT_HEAD) && (eol == bol)) |
1784 | ctx = GREP_CONTEXT_BODY; | |
1785 | ||
0ab7befa | 1786 | hit = match_line(opt, bol, eol, ctx, collect_hits); |
83b5d2f5 JH |
1787 | *eol = ch; |
1788 | ||
0ab7befa JH |
1789 | if (collect_hits) |
1790 | goto next_line; | |
1791 | ||
83b5d2f5 JH |
1792 | /* "grep -v -e foo -e bla" should list lines |
1793 | * that do not have either, so inversion should | |
1794 | * be done outside. | |
1795 | */ | |
1796 | if (opt->invert) | |
1797 | hit = !hit; | |
1798 | if (opt->unmatch_name_only) { | |
1799 | if (hit) | |
1800 | return 0; | |
1801 | goto next_line; | |
1802 | } | |
1803 | if (hit) { | |
1804 | count++; | |
1805 | if (opt->status_only) | |
1806 | return 1; | |
321ffcc0 | 1807 | if (opt->name_only) { |
e1327023 | 1808 | show_name(opt, gs->name); |
321ffcc0 RS |
1809 | return 1; |
1810 | } | |
c30c10cf RS |
1811 | if (opt->count) |
1812 | goto next_line; | |
83b5d2f5 | 1813 | if (binary_match_only) { |
5b594f45 | 1814 | opt->output(opt, "Binary file ", 12); |
e1327023 | 1815 | output_color(opt, gs->name, strlen(gs->name), |
55f638bd | 1816 | opt->color_filename); |
5b594f45 | 1817 | opt->output(opt, " matches\n", 9); |
83b5d2f5 JH |
1818 | return 1; |
1819 | } | |
83b5d2f5 JH |
1820 | /* Hit at this line. If we haven't shown the |
1821 | * pre-context lines, we would need to show them. | |
83b5d2f5 | 1822 | */ |
ba8ea749 | 1823 | if (opt->pre_context || opt->funcbody) |
e1327023 | 1824 | show_pre_context(opt, gs, bol, eol, lno); |
2944e4e6 | 1825 | else if (opt->funcname) |
e1327023 JK |
1826 | show_funcname_line(opt, gs, bol, lno); |
1827 | show_line(opt, bol, eol, gs->name, lno, ':'); | |
5dd06d38 | 1828 | last_hit = lno; |
ba8ea749 RS |
1829 | if (opt->funcbody) |
1830 | show_function = 1; | |
1831 | goto next_line; | |
83b5d2f5 | 1832 | } |
4aa2c475 RS |
1833 | if (show_function && (!peek_bol || peek_bol < bol)) { |
1834 | unsigned long peek_left = left; | |
1835 | char *peek_eol = eol; | |
1836 | ||
1837 | /* | |
1838 | * Trailing empty lines are not interesting. | |
1839 | * Peek past them to see if they belong to the | |
1840 | * body of the current function. | |
1841 | */ | |
1842 | peek_bol = bol; | |
1843 | while (is_empty_line(peek_bol, peek_eol)) { | |
1844 | peek_bol = peek_eol + 1; | |
1845 | peek_eol = end_of_line(peek_bol, &peek_left); | |
1846 | } | |
1847 | ||
1848 | if (match_funcname(opt, gs, peek_bol, peek_eol)) | |
1849 | show_function = 0; | |
1850 | } | |
ba8ea749 RS |
1851 | if (show_function || |
1852 | (last_hit && lno <= last_hit + opt->post_context)) { | |
83b5d2f5 JH |
1853 | /* If the last hit is within the post context, |
1854 | * we need to show this line. | |
1855 | */ | |
e1327023 | 1856 | show_line(opt, bol, eol, gs->name, lno, '-'); |
83b5d2f5 | 1857 | } |
83b5d2f5 JH |
1858 | |
1859 | next_line: | |
1860 | bol = eol + 1; | |
1861 | if (!left) | |
1862 | break; | |
1863 | left--; | |
1864 | lno++; | |
1865 | } | |
1866 | ||
0ab7befa JH |
1867 | if (collect_hits) |
1868 | return 0; | |
b48fb5b6 | 1869 | |
83b5d2f5 | 1870 | if (opt->status_only) |
e1f68c66 | 1871 | return opt->unmatch_name_only; |
83b5d2f5 JH |
1872 | if (opt->unmatch_name_only) { |
1873 | /* We did not see any hit, so we want to show this */ | |
e1327023 | 1874 | show_name(opt, gs->name); |
83b5d2f5 JH |
1875 | return 1; |
1876 | } | |
1877 | ||
60ecac98 RS |
1878 | xdiff_clear_find_func(&xecfg); |
1879 | opt->priv = NULL; | |
1880 | ||
83b5d2f5 JH |
1881 | /* NEEDSWORK: |
1882 | * The real "grep -c foo *.c" gives many "bar.c:0" lines, | |
1883 | * which feels mostly useless but sometimes useful. Maybe | |
1884 | * make it another option? For now suppress them. | |
1885 | */ | |
5b594f45 FK |
1886 | if (opt->count && count) { |
1887 | char buf[32]; | |
f76d947a RS |
1888 | if (opt->pathname) { |
1889 | output_color(opt, gs->name, strlen(gs->name), | |
1890 | opt->color_filename); | |
1891 | output_sep(opt, ':'); | |
1892 | } | |
1a168e5c | 1893 | xsnprintf(buf, sizeof(buf), "%u\n", count); |
5b594f45 | 1894 | opt->output(opt, buf, strlen(buf)); |
c30c10cf | 1895 | return 1; |
5b594f45 | 1896 | } |
83b5d2f5 JH |
1897 | return !!last_hit; |
1898 | } | |
1899 | ||
0ab7befa JH |
1900 | static void clr_hit_marker(struct grep_expr *x) |
1901 | { | |
1902 | /* All-hit markers are meaningful only at the very top level | |
1903 | * OR node. | |
1904 | */ | |
1905 | while (1) { | |
1906 | x->hit = 0; | |
1907 | if (x->node != GREP_NODE_OR) | |
1908 | return; | |
1909 | x->u.binary.left->hit = 0; | |
1910 | x = x->u.binary.right; | |
1911 | } | |
1912 | } | |
1913 | ||
1914 | static int chk_hit_marker(struct grep_expr *x) | |
1915 | { | |
1916 | /* Top level nodes have hit markers. See if they all are hits */ | |
1917 | while (1) { | |
1918 | if (x->node != GREP_NODE_OR) | |
1919 | return x->hit; | |
1920 | if (!x->u.binary.left->hit) | |
1921 | return 0; | |
1922 | x = x->u.binary.right; | |
1923 | } | |
1924 | } | |
1925 | ||
e1327023 | 1926 | int grep_source(struct grep_opt *opt, struct grep_source *gs) |
0ab7befa JH |
1927 | { |
1928 | /* | |
1929 | * we do not have to do the two-pass grep when we do not check | |
1930 | * buffer-wide "all-match". | |
1931 | */ | |
1932 | if (!opt->all_match) | |
e1327023 | 1933 | return grep_source_1(opt, gs, 0); |
0ab7befa JH |
1934 | |
1935 | /* Otherwise the toplevel "or" terms hit a bit differently. | |
1936 | * We first clear hit markers from them. | |
1937 | */ | |
1938 | clr_hit_marker(opt->pattern_expression); | |
e1327023 | 1939 | grep_source_1(opt, gs, 1); |
0ab7befa JH |
1940 | |
1941 | if (!chk_hit_marker(opt->pattern_expression)) | |
1942 | return 0; | |
1943 | ||
e1327023 JK |
1944 | return grep_source_1(opt, gs, 0); |
1945 | } | |
1946 | ||
c876d6da | 1947 | int grep_buffer(struct grep_opt *opt, char *buf, unsigned long size) |
e1327023 JK |
1948 | { |
1949 | struct grep_source gs; | |
1950 | int r; | |
1951 | ||
55c61688 | 1952 | grep_source_init(&gs, GREP_SOURCE_BUF, NULL, NULL, NULL); |
e1327023 JK |
1953 | gs.buf = buf; |
1954 | gs.size = size; | |
1955 | ||
1956 | r = grep_source(opt, &gs); | |
1957 | ||
1958 | grep_source_clear(&gs); | |
1959 | return r; | |
1960 | } | |
1961 | ||
1962 | void grep_source_init(struct grep_source *gs, enum grep_source_type type, | |
55c61688 NTND |
1963 | const char *name, const char *path, |
1964 | const void *identifier) | |
e1327023 JK |
1965 | { |
1966 | gs->type = type; | |
8c53f071 JK |
1967 | gs->name = xstrdup_or_null(name); |
1968 | gs->path = xstrdup_or_null(path); | |
e1327023 JK |
1969 | gs->buf = NULL; |
1970 | gs->size = 0; | |
94ad9d9e | 1971 | gs->driver = NULL; |
e1327023 JK |
1972 | |
1973 | switch (type) { | |
1974 | case GREP_SOURCE_FILE: | |
1975 | gs->identifier = xstrdup(identifier); | |
1976 | break; | |
1c41c82b BW |
1977 | case GREP_SOURCE_OID: |
1978 | gs->identifier = oiddup(identifier); | |
e1327023 JK |
1979 | break; |
1980 | case GREP_SOURCE_BUF: | |
1981 | gs->identifier = NULL; | |
4538eef5 | 1982 | break; |
e1327023 JK |
1983 | } |
1984 | } | |
1985 | ||
1986 | void grep_source_clear(struct grep_source *gs) | |
1987 | { | |
88ce3ef6 ÆAB |
1988 | FREE_AND_NULL(gs->name); |
1989 | FREE_AND_NULL(gs->path); | |
1990 | FREE_AND_NULL(gs->identifier); | |
e1327023 JK |
1991 | grep_source_clear_data(gs); |
1992 | } | |
1993 | ||
1994 | void grep_source_clear_data(struct grep_source *gs) | |
1995 | { | |
1996 | switch (gs->type) { | |
1997 | case GREP_SOURCE_FILE: | |
1c41c82b | 1998 | case GREP_SOURCE_OID: |
6a83d902 | 1999 | FREE_AND_NULL(gs->buf); |
e1327023 JK |
2000 | gs->size = 0; |
2001 | break; | |
2002 | case GREP_SOURCE_BUF: | |
2003 | /* leave user-provided buf intact */ | |
2004 | break; | |
2005 | } | |
2006 | } | |
2007 | ||
1c41c82b | 2008 | static int grep_source_load_oid(struct grep_source *gs) |
e1327023 JK |
2009 | { |
2010 | enum object_type type; | |
2011 | ||
2012 | grep_read_lock(); | |
2013 | gs->buf = read_sha1_file(gs->identifier, &type, &gs->size); | |
2014 | grep_read_unlock(); | |
2015 | ||
2016 | if (!gs->buf) | |
2017 | return error(_("'%s': unable to read %s"), | |
2018 | gs->name, | |
1c41c82b | 2019 | oid_to_hex(gs->identifier)); |
e1327023 JK |
2020 | return 0; |
2021 | } | |
2022 | ||
2023 | static int grep_source_load_file(struct grep_source *gs) | |
2024 | { | |
2025 | const char *filename = gs->identifier; | |
2026 | struct stat st; | |
2027 | char *data; | |
2028 | size_t size; | |
2029 | int i; | |
2030 | ||
2031 | if (lstat(filename, &st) < 0) { | |
2032 | err_ret: | |
2033 | if (errno != ENOENT) | |
7645d8f1 | 2034 | error_errno(_("failed to stat '%s'"), filename); |
e1327023 JK |
2035 | return -1; |
2036 | } | |
2037 | if (!S_ISREG(st.st_mode)) | |
2038 | return -1; | |
2039 | size = xsize_t(st.st_size); | |
2040 | i = open(filename, O_RDONLY); | |
2041 | if (i < 0) | |
2042 | goto err_ret; | |
3733e694 | 2043 | data = xmallocz(size); |
e1327023 | 2044 | if (st.st_size != read_in_full(i, data, size)) { |
7645d8f1 | 2045 | error_errno(_("'%s': short read"), filename); |
e1327023 JK |
2046 | close(i); |
2047 | free(data); | |
2048 | return -1; | |
2049 | } | |
2050 | close(i); | |
e1327023 JK |
2051 | |
2052 | gs->buf = data; | |
2053 | gs->size = size; | |
2054 | return 0; | |
2055 | } | |
2056 | ||
3083301e | 2057 | static int grep_source_load(struct grep_source *gs) |
e1327023 JK |
2058 | { |
2059 | if (gs->buf) | |
2060 | return 0; | |
2061 | ||
2062 | switch (gs->type) { | |
2063 | case GREP_SOURCE_FILE: | |
2064 | return grep_source_load_file(gs); | |
1c41c82b BW |
2065 | case GREP_SOURCE_OID: |
2066 | return grep_source_load_oid(gs); | |
e1327023 JK |
2067 | case GREP_SOURCE_BUF: |
2068 | return gs->buf ? 0 : -1; | |
2069 | } | |
4538eef5 | 2070 | die("BUG: invalid grep_source type to load"); |
0ab7befa | 2071 | } |
94ad9d9e JK |
2072 | |
2073 | void grep_source_load_driver(struct grep_source *gs) | |
2074 | { | |
2075 | if (gs->driver) | |
2076 | return; | |
2077 | ||
2078 | grep_attr_lock(); | |
55c61688 NTND |
2079 | if (gs->path) |
2080 | gs->driver = userdiff_find_by_path(gs->path); | |
94ad9d9e JK |
2081 | if (!gs->driver) |
2082 | gs->driver = userdiff_find_by_name("default"); | |
2083 | grep_attr_unlock(); | |
2084 | } | |
41b59bfc | 2085 | |
3083301e | 2086 | static int grep_source_is_binary(struct grep_source *gs) |
41b59bfc JK |
2087 | { |
2088 | grep_source_load_driver(gs); | |
2089 | if (gs->driver->binary != -1) | |
2090 | return gs->driver->binary; | |
2091 | ||
2092 | if (!grep_source_load(gs)) | |
2093 | return buffer_is_binary(gs->buf, gs->size); | |
2094 | ||
2095 | return 0; | |
2096 | } |