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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" |
cbd53a21 | 4 | #include "object-store.h" |
60ecac98 | 5 | #include "userdiff.h" |
6bfce93e | 6 | #include "xdiff-interface.h" |
335ec3bf JK |
7 | #include "diff.h" |
8 | #include "diffcore.h" | |
5c1ebcca | 9 | #include "commit.h" |
793dc676 | 10 | #include "quote.h" |
3ac68a93 | 11 | #include "help.h" |
83b5d2f5 | 12 | |
07a7d656 | 13 | static int grep_source_load(struct grep_source *gs); |
acd00ea0 NTND |
14 | static int grep_source_is_binary(struct grep_source *gs, |
15 | struct index_state *istate); | |
07a7d656 | 16 | |
7687a054 JH |
17 | static struct grep_opt grep_defaults; |
18 | ||
fa151dc5 NTND |
19 | static const char *color_grep_slots[] = { |
20 | [GREP_COLOR_CONTEXT] = "context", | |
21 | [GREP_COLOR_FILENAME] = "filename", | |
22 | [GREP_COLOR_FUNCTION] = "function", | |
23 | [GREP_COLOR_LINENO] = "lineNumber", | |
d036d667 | 24 | [GREP_COLOR_COLUMNNO] = "column", |
fa151dc5 NTND |
25 | [GREP_COLOR_MATCH_CONTEXT] = "matchContext", |
26 | [GREP_COLOR_MATCH_SELECTED] = "matchSelected", | |
27 | [GREP_COLOR_SELECTED] = "selected", | |
28 | [GREP_COLOR_SEP] = "separator", | |
29 | }; | |
30 | ||
379642bc BW |
31 | static void std_output(struct grep_opt *opt, const void *buf, size_t size) |
32 | { | |
33 | fwrite(buf, size, 1, stdout); | |
34 | } | |
35 | ||
75e5e9c3 SB |
36 | static void color_set(char *dst, const char *color_bytes) |
37 | { | |
38 | xsnprintf(dst, COLOR_MAXLEN, "%s", color_bytes); | |
39 | } | |
40 | ||
7687a054 JH |
41 | /* |
42 | * Initialize the grep_defaults template with hardcoded defaults. | |
43 | * We could let the compiler do this, but without C99 initializers | |
44 | * the code gets unwieldy and unreadable, so... | |
45 | */ | |
38bbc2ea | 46 | void init_grep_defaults(struct repository *repo) |
7687a054 JH |
47 | { |
48 | struct grep_opt *opt = &grep_defaults; | |
918d4e1c JH |
49 | static int run_once; |
50 | ||
51 | if (run_once) | |
52 | return; | |
53 | run_once++; | |
7687a054 JH |
54 | |
55 | memset(opt, 0, sizeof(*opt)); | |
38bbc2ea | 56 | opt->repo = repo; |
7687a054 JH |
57 | opt->relative = 1; |
58 | opt->pathname = 1; | |
7687a054 JH |
59 | opt->max_depth = -1; |
60 | opt->pattern_type_option = GREP_PATTERN_TYPE_UNSPECIFIED; | |
fa151dc5 NTND |
61 | color_set(opt->colors[GREP_COLOR_CONTEXT], ""); |
62 | color_set(opt->colors[GREP_COLOR_FILENAME], ""); | |
63 | color_set(opt->colors[GREP_COLOR_FUNCTION], ""); | |
64 | color_set(opt->colors[GREP_COLOR_LINENO], ""); | |
d036d667 | 65 | color_set(opt->colors[GREP_COLOR_COLUMNNO], ""); |
fa151dc5 NTND |
66 | color_set(opt->colors[GREP_COLOR_MATCH_CONTEXT], GIT_COLOR_BOLD_RED); |
67 | color_set(opt->colors[GREP_COLOR_MATCH_SELECTED], GIT_COLOR_BOLD_RED); | |
68 | color_set(opt->colors[GREP_COLOR_SELECTED], ""); | |
69 | color_set(opt->colors[GREP_COLOR_SEP], GIT_COLOR_CYAN); | |
9d8db06e | 70 | opt->only_matching = 0; |
7687a054 | 71 | opt->color = -1; |
379642bc | 72 | opt->output = std_output; |
7687a054 JH |
73 | } |
74 | ||
75 | static int parse_pattern_type_arg(const char *opt, const char *arg) | |
76 | { | |
77 | if (!strcmp(arg, "default")) | |
78 | return GREP_PATTERN_TYPE_UNSPECIFIED; | |
79 | else if (!strcmp(arg, "basic")) | |
80 | return GREP_PATTERN_TYPE_BRE; | |
81 | else if (!strcmp(arg, "extended")) | |
82 | return GREP_PATTERN_TYPE_ERE; | |
83 | else if (!strcmp(arg, "fixed")) | |
84 | return GREP_PATTERN_TYPE_FIXED; | |
85 | else if (!strcmp(arg, "perl")) | |
86 | return GREP_PATTERN_TYPE_PCRE; | |
87 | die("bad %s argument: %s", opt, arg); | |
88 | } | |
89 | ||
3ac68a93 NTND |
90 | define_list_config_array_extra(color_grep_slots, {"match"}); |
91 | ||
7687a054 JH |
92 | /* |
93 | * Read the configuration file once and store it in | |
94 | * the grep_defaults template. | |
95 | */ | |
96 | int grep_config(const char *var, const char *value, void *cb) | |
97 | { | |
98 | struct grep_opt *opt = &grep_defaults; | |
fa151dc5 | 99 | const char *slot; |
7687a054 JH |
100 | |
101 | if (userdiff_config(var, value) < 0) | |
102 | return -1; | |
103 | ||
104 | if (!strcmp(var, "grep.extendedregexp")) { | |
c7e38551 | 105 | opt->extended_regexp_option = git_config_bool(var, value); |
7687a054 JH |
106 | return 0; |
107 | } | |
108 | ||
109 | if (!strcmp(var, "grep.patterntype")) { | |
110 | opt->pattern_type_option = parse_pattern_type_arg(var, value); | |
111 | return 0; | |
112 | } | |
113 | ||
114 | if (!strcmp(var, "grep.linenumber")) { | |
115 | opt->linenum = git_config_bool(var, value); | |
116 | return 0; | |
117 | } | |
6653fec3 TB |
118 | if (!strcmp(var, "grep.column")) { |
119 | opt->columnnum = git_config_bool(var, value); | |
120 | return 0; | |
121 | } | |
7687a054 | 122 | |
6453f7b3 AS |
123 | if (!strcmp(var, "grep.fullname")) { |
124 | opt->relative = !git_config_bool(var, value); | |
125 | return 0; | |
126 | } | |
127 | ||
7687a054 JH |
128 | if (!strcmp(var, "color.grep")) |
129 | opt->color = git_config_colorbool(var, value); | |
fa151dc5 NTND |
130 | if (!strcmp(var, "color.grep.match")) { |
131 | if (grep_config("color.grep.matchcontext", value, cb) < 0) | |
132 | return -1; | |
133 | if (grep_config("color.grep.matchselected", value, cb) < 0) | |
134 | return -1; | |
135 | } else if (skip_prefix(var, "color.grep.", &slot)) { | |
136 | int i = LOOKUP_CONFIG(color_grep_slots, slot); | |
137 | char *color; | |
138 | ||
139 | if (i < 0) | |
140 | return -1; | |
141 | color = opt->colors[i]; | |
7687a054 JH |
142 | if (!value) |
143 | return config_error_nonbool(var); | |
f6c5a296 | 144 | return color_parse(value, color); |
7687a054 JH |
145 | } |
146 | return 0; | |
147 | } | |
148 | ||
149 | /* | |
150 | * Initialize one instance of grep_opt and copy the | |
151 | * default values from the template we read the configuration | |
152 | * information in an earlier call to git_config(grep_config). | |
153 | */ | |
38bbc2ea | 154 | void grep_init(struct grep_opt *opt, struct repository *repo, const char *prefix) |
7687a054 JH |
155 | { |
156 | struct grep_opt *def = &grep_defaults; | |
fa151dc5 | 157 | int i; |
7687a054 JH |
158 | |
159 | memset(opt, 0, sizeof(*opt)); | |
38bbc2ea | 160 | opt->repo = repo; |
7687a054 JH |
161 | opt->prefix = prefix; |
162 | opt->prefix_length = (prefix && *prefix) ? strlen(prefix) : 0; | |
163 | opt->pattern_tail = &opt->pattern_list; | |
164 | opt->header_tail = &opt->header_list; | |
165 | ||
9d8db06e | 166 | opt->only_matching = def->only_matching; |
7687a054 JH |
167 | opt->color = def->color; |
168 | opt->extended_regexp_option = def->extended_regexp_option; | |
169 | opt->pattern_type_option = def->pattern_type_option; | |
170 | opt->linenum = def->linenum; | |
017c0fcf | 171 | opt->columnnum = def->columnnum; |
7687a054 JH |
172 | opt->max_depth = def->max_depth; |
173 | opt->pathname = def->pathname; | |
7687a054 | 174 | opt->relative = def->relative; |
379642bc | 175 | opt->output = def->output; |
7687a054 | 176 | |
fa151dc5 NTND |
177 | for (i = 0; i < NR_GREP_COLORS; i++) |
178 | color_set(opt->colors[i], def->colors[i]); | |
7687a054 | 179 | } |
07a7d656 | 180 | |
8465541e | 181 | static void grep_set_pattern_type_option(enum grep_pattern_type pattern_type, struct grep_opt *opt) |
c5c31d33 | 182 | { |
07a3d411 ÆAB |
183 | /* |
184 | * When committing to the pattern type by setting the relevant | |
185 | * fields in grep_opt it's generally not necessary to zero out | |
186 | * the fields we're not choosing, since they won't have been | |
187 | * set by anything. The extended_regexp_option field is the | |
188 | * only exception to this. | |
189 | * | |
190 | * This is because in the process of parsing grep.patternType | |
191 | * & grep.extendedRegexp we set opt->pattern_type_option and | |
192 | * opt->extended_regexp_option, respectively. We then | |
193 | * internally use opt->extended_regexp_option to see if we're | |
194 | * compiling an ERE. It must be unset if that's not actually | |
195 | * the case. | |
196 | */ | |
197 | if (pattern_type != GREP_PATTERN_TYPE_ERE && | |
198 | opt->extended_regexp_option) | |
199 | opt->extended_regexp_option = 0; | |
200 | ||
c5c31d33 JH |
201 | switch (pattern_type) { |
202 | case GREP_PATTERN_TYPE_UNSPECIFIED: | |
203 | /* fall through */ | |
204 | ||
205 | case GREP_PATTERN_TYPE_BRE: | |
c5c31d33 JH |
206 | break; |
207 | ||
208 | case GREP_PATTERN_TYPE_ERE: | |
07a3d411 | 209 | opt->extended_regexp_option = 1; |
c5c31d33 JH |
210 | break; |
211 | ||
212 | case GREP_PATTERN_TYPE_FIXED: | |
213 | opt->fixed = 1; | |
c5c31d33 JH |
214 | break; |
215 | ||
216 | case GREP_PATTERN_TYPE_PCRE: | |
94da9193 | 217 | #ifdef USE_LIBPCRE2 |
94da9193 ÆAB |
218 | opt->pcre2 = 1; |
219 | #else | |
220 | /* | |
221 | * It's important that pcre1 always be assigned to | |
222 | * even when there's no USE_LIBPCRE* defined. We still | |
223 | * call the PCRE stub function, it just dies with | |
224 | * "cannot use Perl-compatible regexes[...]". | |
225 | */ | |
6d4b5747 | 226 | opt->pcre1 = 1; |
94da9193 | 227 | #endif |
c5c31d33 JH |
228 | break; |
229 | } | |
230 | } | |
231 | ||
8465541e JH |
232 | void grep_commit_pattern_type(enum grep_pattern_type pattern_type, struct grep_opt *opt) |
233 | { | |
234 | if (pattern_type != GREP_PATTERN_TYPE_UNSPECIFIED) | |
235 | grep_set_pattern_type_option(pattern_type, opt); | |
236 | else if (opt->pattern_type_option != GREP_PATTERN_TYPE_UNSPECIFIED) | |
237 | grep_set_pattern_type_option(opt->pattern_type_option, opt); | |
238 | else if (opt->extended_regexp_option) | |
07a3d411 ÆAB |
239 | /* |
240 | * This branch *must* happen after setting from the | |
241 | * opt->pattern_type_option above, we don't want | |
242 | * grep.extendedRegexp to override grep.patternType! | |
243 | */ | |
8465541e JH |
244 | grep_set_pattern_type_option(GREP_PATTERN_TYPE_ERE, opt); |
245 | } | |
246 | ||
fc456751 RS |
247 | static struct grep_pat *create_grep_pat(const char *pat, size_t patlen, |
248 | const char *origin, int no, | |
249 | enum grep_pat_token t, | |
250 | enum grep_header_field field) | |
a4d7d2c6 JH |
251 | { |
252 | struct grep_pat *p = xcalloc(1, sizeof(*p)); | |
526a858a | 253 | p->pattern = xmemdupz(pat, patlen); |
fc456751 RS |
254 | p->patternlen = patlen; |
255 | p->origin = origin; | |
256 | p->no = no; | |
257 | p->token = t; | |
a4d7d2c6 | 258 | p->field = field; |
fc456751 RS |
259 | return p; |
260 | } | |
261 | ||
2b3873ff RS |
262 | static void do_append_grep_pat(struct grep_pat ***tail, struct grep_pat *p) |
263 | { | |
264 | **tail = p; | |
265 | *tail = &p->next; | |
a4d7d2c6 | 266 | p->next = NULL; |
526a858a RS |
267 | |
268 | switch (p->token) { | |
269 | case GREP_PATTERN: /* atom */ | |
270 | case GREP_PATTERN_HEAD: | |
271 | case GREP_PATTERN_BODY: | |
272 | for (;;) { | |
273 | struct grep_pat *new_pat; | |
274 | size_t len = 0; | |
275 | char *cp = p->pattern + p->patternlen, *nl = NULL; | |
276 | while (++len <= p->patternlen) { | |
277 | if (*(--cp) == '\n') { | |
278 | nl = cp; | |
279 | break; | |
280 | } | |
281 | } | |
282 | if (!nl) | |
283 | break; | |
284 | new_pat = create_grep_pat(nl + 1, len - 1, p->origin, | |
285 | p->no, p->token, p->field); | |
286 | new_pat->next = p->next; | |
287 | if (!p->next) | |
288 | *tail = &new_pat->next; | |
289 | p->next = new_pat; | |
290 | *nl = '\0'; | |
291 | p->patternlen -= len; | |
292 | } | |
293 | break; | |
294 | default: | |
295 | break; | |
296 | } | |
2b3873ff RS |
297 | } |
298 | ||
fc456751 RS |
299 | void append_header_grep_pattern(struct grep_opt *opt, |
300 | enum grep_header_field field, const char *pat) | |
301 | { | |
302 | struct grep_pat *p = create_grep_pat(pat, strlen(pat), "header", 0, | |
303 | GREP_PATTERN_HEAD, field); | |
baa6378f JH |
304 | if (field == GREP_HEADER_REFLOG) |
305 | opt->use_reflog_filter = 1; | |
2b3873ff | 306 | do_append_grep_pat(&opt->header_tail, p); |
a4d7d2c6 JH |
307 | } |
308 | ||
83b5d2f5 JH |
309 | void append_grep_pattern(struct grep_opt *opt, const char *pat, |
310 | const char *origin, int no, enum grep_pat_token t) | |
ed40a095 RS |
311 | { |
312 | append_grep_pat(opt, pat, strlen(pat), origin, no, t); | |
313 | } | |
314 | ||
315 | void append_grep_pat(struct grep_opt *opt, const char *pat, size_t patlen, | |
316 | const char *origin, int no, enum grep_pat_token t) | |
83b5d2f5 | 317 | { |
fc456751 | 318 | struct grep_pat *p = create_grep_pat(pat, patlen, origin, no, t, 0); |
2b3873ff | 319 | do_append_grep_pat(&opt->pattern_tail, p); |
83b5d2f5 JH |
320 | } |
321 | ||
5b594f45 FK |
322 | struct grep_opt *grep_opt_dup(const struct grep_opt *opt) |
323 | { | |
324 | struct grep_pat *pat; | |
325 | struct grep_opt *ret = xmalloc(sizeof(struct grep_opt)); | |
326 | *ret = *opt; | |
327 | ||
328 | ret->pattern_list = NULL; | |
329 | ret->pattern_tail = &ret->pattern_list; | |
330 | ||
331 | for(pat = opt->pattern_list; pat != NULL; pat = pat->next) | |
332 | { | |
333 | if(pat->token == GREP_PATTERN_HEAD) | |
334 | append_header_grep_pattern(ret, pat->field, | |
335 | pat->pattern); | |
336 | else | |
ed40a095 RS |
337 | append_grep_pat(ret, pat->pattern, pat->patternlen, |
338 | pat->origin, pat->no, pat->token); | |
5b594f45 FK |
339 | } |
340 | ||
341 | return ret; | |
342 | } | |
343 | ||
a30c148a MK |
344 | static NORETURN void compile_regexp_failed(const struct grep_pat *p, |
345 | const char *error) | |
346 | { | |
347 | char where[1024]; | |
348 | ||
349 | if (p->no) | |
19bdd3e7 | 350 | xsnprintf(where, sizeof(where), "In '%s' at %d, ", p->origin, p->no); |
a30c148a | 351 | else if (p->origin) |
19bdd3e7 | 352 | xsnprintf(where, sizeof(where), "%s, ", p->origin); |
a30c148a MK |
353 | else |
354 | where[0] = 0; | |
355 | ||
356 | die("%s'%s': %s", where, p->pattern, error); | |
357 | } | |
358 | ||
543f1c0c ÆAB |
359 | static int is_fixed(const char *s, size_t len) |
360 | { | |
361 | size_t i; | |
362 | ||
363 | for (i = 0; i < len; i++) { | |
364 | if (is_regex_special(s[i])) | |
365 | return 0; | |
366 | } | |
367 | ||
368 | return 1; | |
369 | } | |
370 | ||
219e65b6 ÆAB |
371 | static int has_null(const char *s, size_t len) |
372 | { | |
373 | /* | |
374 | * regcomp cannot accept patterns with NULs so when using it | |
375 | * we consider any pattern containing a NUL fixed. | |
376 | */ | |
377 | if (memchr(s, 0, len)) | |
378 | return 1; | |
379 | ||
380 | return 0; | |
381 | } | |
382 | ||
3485bea1 | 383 | #ifdef USE_LIBPCRE1 |
6d4b5747 | 384 | static void compile_pcre1_regexp(struct grep_pat *p, const struct grep_opt *opt) |
63e7e9d8 MK |
385 | { |
386 | const char *error; | |
387 | int erroffset; | |
fba4f125 | 388 | int options = PCRE_MULTILINE; |
63e7e9d8 | 389 | |
9d9babb8 | 390 | if (opt->ignore_case) { |
44570188 | 391 | if (!opt->ignore_locale && has_non_ascii(p->pattern)) |
6d4b5747 | 392 | p->pcre1_tables = pcre_maketables(); |
63e7e9d8 | 393 | options |= PCRE_CASELESS; |
9d9babb8 | 394 | } |
44570188 | 395 | if (!opt->ignore_locale && is_utf8_locale() && has_non_ascii(p->pattern)) |
18547aac | 396 | options |= PCRE_UTF8; |
63e7e9d8 | 397 | |
6d4b5747 ÆAB |
398 | p->pcre1_regexp = pcre_compile(p->pattern, options, &error, &erroffset, |
399 | p->pcre1_tables); | |
400 | if (!p->pcre1_regexp) | |
63e7e9d8 MK |
401 | compile_regexp_failed(p, error); |
402 | ||
2fff1e19 | 403 | p->pcre1_extra_info = pcre_study(p->pcre1_regexp, GIT_PCRE_STUDY_JIT_COMPILE, &error); |
6d4b5747 | 404 | if (!p->pcre1_extra_info && error) |
63e7e9d8 | 405 | die("%s", error); |
fbaceaac | 406 | |
e87de7ca | 407 | #ifdef GIT_PCRE1_USE_JIT |
fbaceaac ÆAB |
408 | pcre_config(PCRE_CONFIG_JIT, &p->pcre1_jit_on); |
409 | if (p->pcre1_jit_on == 1) { | |
410 | p->pcre1_jit_stack = pcre_jit_stack_alloc(1, 1024 * 1024); | |
411 | if (!p->pcre1_jit_stack) | |
412 | die("Couldn't allocate PCRE JIT stack"); | |
413 | pcre_assign_jit_stack(p->pcre1_extra_info, NULL, p->pcre1_jit_stack); | |
414 | } else if (p->pcre1_jit_on != 0) { | |
033abf97 | 415 | BUG("The pcre1_jit_on variable should be 0 or 1, not %d", |
fbaceaac ÆAB |
416 | p->pcre1_jit_on); |
417 | } | |
418 | #endif | |
63e7e9d8 MK |
419 | } |
420 | ||
6d4b5747 | 421 | static int pcre1match(struct grep_pat *p, const char *line, const char *eol, |
63e7e9d8 MK |
422 | regmatch_t *match, int eflags) |
423 | { | |
424 | int ovector[30], ret, flags = 0; | |
425 | ||
426 | if (eflags & REG_NOTBOL) | |
427 | flags |= PCRE_NOTBOL; | |
428 | ||
e87de7ca | 429 | #ifdef GIT_PCRE1_USE_JIT |
fbaceaac ÆAB |
430 | if (p->pcre1_jit_on) { |
431 | ret = pcre_jit_exec(p->pcre1_regexp, p->pcre1_extra_info, line, | |
432 | eol - line, 0, flags, ovector, | |
433 | ARRAY_SIZE(ovector), p->pcre1_jit_stack); | |
434 | } else | |
435 | #endif | |
436 | { | |
437 | ret = pcre_exec(p->pcre1_regexp, p->pcre1_extra_info, line, | |
438 | eol - line, 0, flags, ovector, | |
439 | ARRAY_SIZE(ovector)); | |
440 | } | |
441 | ||
63e7e9d8 MK |
442 | if (ret < 0 && ret != PCRE_ERROR_NOMATCH) |
443 | die("pcre_exec failed with error code %d", ret); | |
444 | if (ret > 0) { | |
445 | ret = 0; | |
446 | match->rm_so = ovector[0]; | |
447 | match->rm_eo = ovector[1]; | |
448 | } | |
449 | ||
450 | return ret; | |
451 | } | |
452 | ||
6d4b5747 | 453 | static void free_pcre1_regexp(struct grep_pat *p) |
63e7e9d8 | 454 | { |
6d4b5747 | 455 | pcre_free(p->pcre1_regexp); |
e87de7ca | 456 | #ifdef GIT_PCRE1_USE_JIT |
fbaceaac ÆAB |
457 | if (p->pcre1_jit_on) { |
458 | pcre_free_study(p->pcre1_extra_info); | |
459 | pcre_jit_stack_free(p->pcre1_jit_stack); | |
460 | } else | |
461 | #endif | |
462 | { | |
463 | pcre_free(p->pcre1_extra_info); | |
464 | } | |
6d4b5747 | 465 | pcre_free((void *)p->pcre1_tables); |
63e7e9d8 | 466 | } |
3485bea1 | 467 | #else /* !USE_LIBPCRE1 */ |
6d4b5747 | 468 | static void compile_pcre1_regexp(struct grep_pat *p, const struct grep_opt *opt) |
63e7e9d8 MK |
469 | { |
470 | die("cannot use Perl-compatible regexes when not compiled with USE_LIBPCRE"); | |
471 | } | |
472 | ||
6d4b5747 | 473 | static int pcre1match(struct grep_pat *p, const char *line, const char *eol, |
63e7e9d8 MK |
474 | regmatch_t *match, int eflags) |
475 | { | |
476 | return 1; | |
477 | } | |
478 | ||
6d4b5747 | 479 | static void free_pcre1_regexp(struct grep_pat *p) |
63e7e9d8 MK |
480 | { |
481 | } | |
3485bea1 | 482 | #endif /* !USE_LIBPCRE1 */ |
63e7e9d8 | 483 | |
94da9193 ÆAB |
484 | #ifdef USE_LIBPCRE2 |
485 | static void compile_pcre2_pattern(struct grep_pat *p, const struct grep_opt *opt) | |
486 | { | |
487 | int error; | |
488 | PCRE2_UCHAR errbuf[256]; | |
489 | PCRE2_SIZE erroffset; | |
490 | int options = PCRE2_MULTILINE; | |
491 | const uint8_t *character_tables = NULL; | |
492 | int jitret; | |
a25b9085 ÆAB |
493 | int patinforet; |
494 | size_t jitsizearg; | |
94da9193 ÆAB |
495 | |
496 | assert(opt->pcre2); | |
497 | ||
498 | p->pcre2_compile_context = NULL; | |
499 | ||
500 | if (opt->ignore_case) { | |
44570188 | 501 | if (!opt->ignore_locale && has_non_ascii(p->pattern)) { |
94da9193 ÆAB |
502 | character_tables = pcre2_maketables(NULL); |
503 | p->pcre2_compile_context = pcre2_compile_context_create(NULL); | |
504 | pcre2_set_character_tables(p->pcre2_compile_context, character_tables); | |
505 | } | |
506 | options |= PCRE2_CASELESS; | |
507 | } | |
44570188 | 508 | if (!opt->ignore_locale && is_utf8_locale() && has_non_ascii(p->pattern)) |
94da9193 ÆAB |
509 | options |= PCRE2_UTF; |
510 | ||
511 | p->pcre2_pattern = pcre2_compile((PCRE2_SPTR)p->pattern, | |
512 | p->patternlen, options, &error, &erroffset, | |
513 | p->pcre2_compile_context); | |
514 | ||
515 | if (p->pcre2_pattern) { | |
516 | p->pcre2_match_data = pcre2_match_data_create_from_pattern(p->pcre2_pattern, NULL); | |
517 | if (!p->pcre2_match_data) | |
518 | die("Couldn't allocate PCRE2 match data"); | |
519 | } else { | |
520 | pcre2_get_error_message(error, errbuf, sizeof(errbuf)); | |
521 | compile_regexp_failed(p, (const char *)&errbuf); | |
522 | } | |
523 | ||
524 | pcre2_config(PCRE2_CONFIG_JIT, &p->pcre2_jit_on); | |
525 | if (p->pcre2_jit_on == 1) { | |
526 | jitret = pcre2_jit_compile(p->pcre2_pattern, PCRE2_JIT_COMPLETE); | |
527 | if (jitret) | |
528 | die("Couldn't JIT the PCRE2 pattern '%s', got '%d'\n", p->pattern, jitret); | |
a25b9085 ÆAB |
529 | |
530 | /* | |
531 | * The pcre2_config(PCRE2_CONFIG_JIT, ...) call just | |
532 | * tells us whether the library itself supports JIT, | |
533 | * but to see whether we're going to be actually using | |
534 | * JIT we need to extract PCRE2_INFO_JITSIZE from the | |
535 | * pattern *after* we do pcre2_jit_compile() above. | |
536 | * | |
537 | * This is because if the pattern contains the | |
538 | * (*NO_JIT) verb (see pcre2syntax(3)) | |
539 | * pcre2_jit_compile() will exit early with 0. If we | |
540 | * then proceed to call pcre2_jit_match() further down | |
541 | * the line instead of pcre2_match() we'll either | |
542 | * segfault (pre PCRE 10.31) or run into a fatal error | |
543 | * (post PCRE2 10.31) | |
544 | */ | |
545 | patinforet = pcre2_pattern_info(p->pcre2_pattern, PCRE2_INFO_JITSIZE, &jitsizearg); | |
546 | if (patinforet) | |
547 | BUG("pcre2_pattern_info() failed: %d", patinforet); | |
548 | if (jitsizearg == 0) { | |
549 | p->pcre2_jit_on = 0; | |
550 | return; | |
551 | } | |
552 | ||
94da9193 ÆAB |
553 | p->pcre2_jit_stack = pcre2_jit_stack_create(1, 1024 * 1024, NULL); |
554 | if (!p->pcre2_jit_stack) | |
555 | die("Couldn't allocate PCRE2 JIT stack"); | |
556 | p->pcre2_match_context = pcre2_match_context_create(NULL); | |
674ad936 | 557 | if (!p->pcre2_match_context) |
94da9193 ÆAB |
558 | die("Couldn't allocate PCRE2 match context"); |
559 | pcre2_jit_stack_assign(p->pcre2_match_context, NULL, p->pcre2_jit_stack); | |
560 | } else if (p->pcre2_jit_on != 0) { | |
033abf97 | 561 | BUG("The pcre2_jit_on variable should be 0 or 1, not %d", |
94da9193 ÆAB |
562 | p->pcre1_jit_on); |
563 | } | |
564 | } | |
565 | ||
566 | static int pcre2match(struct grep_pat *p, const char *line, const char *eol, | |
567 | regmatch_t *match, int eflags) | |
568 | { | |
569 | int ret, flags = 0; | |
570 | PCRE2_SIZE *ovector; | |
571 | PCRE2_UCHAR errbuf[256]; | |
572 | ||
573 | if (eflags & REG_NOTBOL) | |
574 | flags |= PCRE2_NOTBOL; | |
575 | ||
576 | if (p->pcre2_jit_on) | |
577 | ret = pcre2_jit_match(p->pcre2_pattern, (unsigned char *)line, | |
578 | eol - line, 0, flags, p->pcre2_match_data, | |
579 | NULL); | |
580 | else | |
581 | ret = pcre2_match(p->pcre2_pattern, (unsigned char *)line, | |
582 | eol - line, 0, flags, p->pcre2_match_data, | |
583 | NULL); | |
584 | ||
585 | if (ret < 0 && ret != PCRE2_ERROR_NOMATCH) { | |
586 | pcre2_get_error_message(ret, errbuf, sizeof(errbuf)); | |
587 | die("%s failed with error code %d: %s", | |
588 | (p->pcre2_jit_on ? "pcre2_jit_match" : "pcre2_match"), ret, | |
589 | errbuf); | |
590 | } | |
591 | if (ret > 0) { | |
592 | ovector = pcre2_get_ovector_pointer(p->pcre2_match_data); | |
593 | ret = 0; | |
594 | match->rm_so = (int)ovector[0]; | |
595 | match->rm_eo = (int)ovector[1]; | |
596 | } | |
597 | ||
598 | return ret; | |
599 | } | |
600 | ||
601 | static void free_pcre2_pattern(struct grep_pat *p) | |
602 | { | |
603 | pcre2_compile_context_free(p->pcre2_compile_context); | |
604 | pcre2_code_free(p->pcre2_pattern); | |
605 | pcre2_match_data_free(p->pcre2_match_data); | |
606 | pcre2_jit_stack_free(p->pcre2_jit_stack); | |
607 | pcre2_match_context_free(p->pcre2_match_context); | |
608 | } | |
609 | #else /* !USE_LIBPCRE2 */ | |
610 | static void compile_pcre2_pattern(struct grep_pat *p, const struct grep_opt *opt) | |
611 | { | |
612 | /* | |
613 | * Unreachable until USE_LIBPCRE2 becomes synonymous with | |
614 | * USE_LIBPCRE. See the sibling comment in | |
615 | * grep_set_pattern_type_option(). | |
616 | */ | |
617 | die("cannot use Perl-compatible regexes when not compiled with USE_LIBPCRE"); | |
618 | } | |
619 | ||
620 | static int pcre2match(struct grep_pat *p, const char *line, const char *eol, | |
621 | regmatch_t *match, int eflags) | |
622 | { | |
623 | return 1; | |
624 | } | |
625 | ||
626 | static void free_pcre2_pattern(struct grep_pat *p) | |
627 | { | |
628 | } | |
629 | #endif /* !USE_LIBPCRE2 */ | |
630 | ||
793dc676 NTND |
631 | static void compile_fixed_regexp(struct grep_pat *p, struct grep_opt *opt) |
632 | { | |
633 | struct strbuf sb = STRBUF_INIT; | |
634 | int err; | |
1ceababc | 635 | int regflags = 0; |
793dc676 NTND |
636 | |
637 | basic_regex_quote_buf(&sb, p->pattern); | |
793dc676 NTND |
638 | if (opt->ignore_case) |
639 | regflags |= REG_ICASE; | |
640 | err = regcomp(&p->regexp, sb.buf, regflags); | |
641 | if (opt->debug) | |
642 | fprintf(stderr, "fixed %s\n", sb.buf); | |
643 | strbuf_release(&sb); | |
644 | if (err) { | |
645 | char errbuf[1024]; | |
646 | regerror(err, &p->regexp, errbuf, sizeof(errbuf)); | |
793dc676 NTND |
647 | compile_regexp_failed(p, errbuf); |
648 | } | |
649 | } | |
650 | ||
83b5d2f5 JH |
651 | static void compile_regexp(struct grep_pat *p, struct grep_opt *opt) |
652 | { | |
c822255c | 653 | int err; |
07a3d411 | 654 | int regflags = REG_NEWLINE; |
c822255c | 655 | |
d7eb527d | 656 | p->word_regexp = opt->word_regexp; |
5183bf67 | 657 | p->ignore_case = opt->ignore_case; |
d7eb527d | 658 | |
793dc676 NTND |
659 | /* |
660 | * Even when -F (fixed) asks us to do a non-regexp search, we | |
661 | * may not be able to correctly case-fold when -i | |
662 | * (ignore-case) is asked (in which case, we'll synthesize a | |
663 | * regexp to match the pattern that matches regexp special | |
664 | * characters literally, while ignoring case differences). On | |
665 | * the other hand, even without -F, if the pattern does not | |
666 | * have any regexp special characters and there is no need for | |
667 | * case-folding search, we can internally turn it into a | |
668 | * simple string match using kws. p->fixed tells us if we | |
669 | * want to use kws. | |
670 | */ | |
219e65b6 ÆAB |
671 | if (opt->fixed || |
672 | has_null(p->pattern, p->patternlen) || | |
673 | is_fixed(p->pattern, p->patternlen)) | |
f463beb8 | 674 | p->fixed = !p->ignore_case || !has_non_ascii(p->pattern); |
9eceddee FK |
675 | |
676 | if (p->fixed) { | |
07a3d411 | 677 | p->kws = kwsalloc(p->ignore_case ? tolower_trans_tbl : NULL); |
9eceddee FK |
678 | kwsincr(p->kws, p->pattern, p->patternlen); |
679 | kwsprep(p->kws); | |
c822255c | 680 | return; |
793dc676 NTND |
681 | } else if (opt->fixed) { |
682 | /* | |
683 | * We come here when the pattern has the non-ascii | |
684 | * characters we cannot case-fold, and asked to | |
685 | * ignore-case. | |
686 | */ | |
687 | compile_fixed_regexp(p, opt); | |
688 | return; | |
9eceddee | 689 | } |
c822255c | 690 | |
94da9193 ÆAB |
691 | if (opt->pcre2) { |
692 | compile_pcre2_pattern(p, opt); | |
693 | return; | |
694 | } | |
695 | ||
6d4b5747 ÆAB |
696 | if (opt->pcre1) { |
697 | compile_pcre1_regexp(p, opt); | |
63e7e9d8 MK |
698 | return; |
699 | } | |
700 | ||
07a3d411 ÆAB |
701 | if (p->ignore_case) |
702 | regflags |= REG_ICASE; | |
703 | if (opt->extended_regexp_option) | |
704 | regflags |= REG_EXTENDED; | |
705 | err = regcomp(&p->regexp, p->pattern, regflags); | |
83b5d2f5 JH |
706 | if (err) { |
707 | char errbuf[1024]; | |
83b5d2f5 | 708 | regerror(err, &p->regexp, errbuf, 1024); |
a30c148a | 709 | compile_regexp_failed(p, errbuf); |
83b5d2f5 JH |
710 | } |
711 | } | |
712 | ||
0ab7befa | 713 | static struct grep_expr *compile_pattern_or(struct grep_pat **); |
83b5d2f5 JH |
714 | static struct grep_expr *compile_pattern_atom(struct grep_pat **list) |
715 | { | |
716 | struct grep_pat *p; | |
717 | struct grep_expr *x; | |
718 | ||
719 | p = *list; | |
c922b01f LT |
720 | if (!p) |
721 | return NULL; | |
83b5d2f5 JH |
722 | switch (p->token) { |
723 | case GREP_PATTERN: /* atom */ | |
480c1ca6 JH |
724 | case GREP_PATTERN_HEAD: |
725 | case GREP_PATTERN_BODY: | |
83b5d2f5 JH |
726 | x = xcalloc(1, sizeof (struct grep_expr)); |
727 | x->node = GREP_NODE_ATOM; | |
728 | x->u.atom = p; | |
729 | *list = p->next; | |
730 | return x; | |
731 | case GREP_OPEN_PAREN: | |
732 | *list = p->next; | |
0ab7befa | 733 | x = compile_pattern_or(list); |
83b5d2f5 JH |
734 | if (!*list || (*list)->token != GREP_CLOSE_PAREN) |
735 | die("unmatched parenthesis"); | |
736 | *list = (*list)->next; | |
737 | return x; | |
738 | default: | |
739 | return NULL; | |
740 | } | |
741 | } | |
742 | ||
743 | static struct grep_expr *compile_pattern_not(struct grep_pat **list) | |
744 | { | |
745 | struct grep_pat *p; | |
746 | struct grep_expr *x; | |
747 | ||
748 | p = *list; | |
c922b01f LT |
749 | if (!p) |
750 | return NULL; | |
83b5d2f5 JH |
751 | switch (p->token) { |
752 | case GREP_NOT: | |
753 | if (!p->next) | |
754 | die("--not not followed by pattern expression"); | |
755 | *list = p->next; | |
756 | x = xcalloc(1, sizeof (struct grep_expr)); | |
757 | x->node = GREP_NODE_NOT; | |
758 | x->u.unary = compile_pattern_not(list); | |
759 | if (!x->u.unary) | |
760 | die("--not followed by non pattern expression"); | |
761 | return x; | |
762 | default: | |
763 | return compile_pattern_atom(list); | |
764 | } | |
765 | } | |
766 | ||
767 | static struct grep_expr *compile_pattern_and(struct grep_pat **list) | |
768 | { | |
769 | struct grep_pat *p; | |
770 | struct grep_expr *x, *y, *z; | |
771 | ||
772 | x = compile_pattern_not(list); | |
773 | p = *list; | |
774 | if (p && p->token == GREP_AND) { | |
775 | if (!p->next) | |
776 | die("--and not followed by pattern expression"); | |
777 | *list = p->next; | |
778 | y = compile_pattern_and(list); | |
779 | if (!y) | |
780 | die("--and not followed by pattern expression"); | |
781 | z = xcalloc(1, sizeof (struct grep_expr)); | |
782 | z->node = GREP_NODE_AND; | |
783 | z->u.binary.left = x; | |
784 | z->u.binary.right = y; | |
785 | return z; | |
786 | } | |
787 | return x; | |
788 | } | |
789 | ||
790 | static struct grep_expr *compile_pattern_or(struct grep_pat **list) | |
791 | { | |
792 | struct grep_pat *p; | |
793 | struct grep_expr *x, *y, *z; | |
794 | ||
795 | x = compile_pattern_and(list); | |
796 | p = *list; | |
797 | if (x && p && p->token != GREP_CLOSE_PAREN) { | |
798 | y = compile_pattern_or(list); | |
799 | if (!y) | |
800 | die("not a pattern expression %s", p->pattern); | |
801 | z = xcalloc(1, sizeof (struct grep_expr)); | |
802 | z->node = GREP_NODE_OR; | |
803 | z->u.binary.left = x; | |
804 | z->u.binary.right = y; | |
805 | return z; | |
806 | } | |
807 | return x; | |
808 | } | |
809 | ||
810 | static struct grep_expr *compile_pattern_expr(struct grep_pat **list) | |
811 | { | |
812 | return compile_pattern_or(list); | |
813 | } | |
814 | ||
17bf35a3 JH |
815 | static void indent(int in) |
816 | { | |
817 | while (in-- > 0) | |
818 | fputc(' ', stderr); | |
819 | } | |
820 | ||
821 | static void dump_grep_pat(struct grep_pat *p) | |
822 | { | |
823 | switch (p->token) { | |
824 | case GREP_AND: fprintf(stderr, "*and*"); break; | |
825 | case GREP_OPEN_PAREN: fprintf(stderr, "*(*"); break; | |
826 | case GREP_CLOSE_PAREN: fprintf(stderr, "*)*"); break; | |
827 | case GREP_NOT: fprintf(stderr, "*not*"); break; | |
828 | case GREP_OR: fprintf(stderr, "*or*"); break; | |
829 | ||
830 | case GREP_PATTERN: fprintf(stderr, "pattern"); break; | |
831 | case GREP_PATTERN_HEAD: fprintf(stderr, "pattern_head"); break; | |
832 | case GREP_PATTERN_BODY: fprintf(stderr, "pattern_body"); break; | |
833 | } | |
834 | ||
835 | switch (p->token) { | |
836 | default: break; | |
837 | case GREP_PATTERN_HEAD: | |
838 | fprintf(stderr, "<head %d>", p->field); break; | |
839 | case GREP_PATTERN_BODY: | |
840 | fprintf(stderr, "<body>"); break; | |
841 | } | |
842 | switch (p->token) { | |
843 | default: break; | |
844 | case GREP_PATTERN_HEAD: | |
845 | case GREP_PATTERN_BODY: | |
846 | case GREP_PATTERN: | |
847 | fprintf(stderr, "%.*s", (int)p->patternlen, p->pattern); | |
848 | break; | |
849 | } | |
850 | fputc('\n', stderr); | |
851 | } | |
852 | ||
853 | static void dump_grep_expression_1(struct grep_expr *x, int in) | |
854 | { | |
855 | indent(in); | |
856 | switch (x->node) { | |
857 | case GREP_NODE_TRUE: | |
858 | fprintf(stderr, "true\n"); | |
859 | break; | |
860 | case GREP_NODE_ATOM: | |
861 | dump_grep_pat(x->u.atom); | |
862 | break; | |
863 | case GREP_NODE_NOT: | |
864 | fprintf(stderr, "(not\n"); | |
865 | dump_grep_expression_1(x->u.unary, in+1); | |
866 | indent(in); | |
867 | fprintf(stderr, ")\n"); | |
868 | break; | |
869 | case GREP_NODE_AND: | |
870 | fprintf(stderr, "(and\n"); | |
871 | dump_grep_expression_1(x->u.binary.left, in+1); | |
872 | dump_grep_expression_1(x->u.binary.right, in+1); | |
873 | indent(in); | |
874 | fprintf(stderr, ")\n"); | |
875 | break; | |
876 | case GREP_NODE_OR: | |
877 | fprintf(stderr, "(or\n"); | |
878 | dump_grep_expression_1(x->u.binary.left, in+1); | |
879 | dump_grep_expression_1(x->u.binary.right, in+1); | |
880 | indent(in); | |
881 | fprintf(stderr, ")\n"); | |
882 | break; | |
883 | } | |
884 | } | |
885 | ||
07a7d656 | 886 | static void dump_grep_expression(struct grep_opt *opt) |
17bf35a3 JH |
887 | { |
888 | struct grep_expr *x = opt->pattern_expression; | |
889 | ||
890 | if (opt->all_match) | |
891 | fprintf(stderr, "[all-match]\n"); | |
892 | dump_grep_expression_1(x, 0); | |
893 | fflush(NULL); | |
894 | } | |
895 | ||
5aaeb733 JH |
896 | static struct grep_expr *grep_true_expr(void) |
897 | { | |
898 | struct grep_expr *z = xcalloc(1, sizeof(*z)); | |
899 | z->node = GREP_NODE_TRUE; | |
900 | return z; | |
901 | } | |
902 | ||
903 | static struct grep_expr *grep_or_expr(struct grep_expr *left, struct grep_expr *right) | |
904 | { | |
905 | struct grep_expr *z = xcalloc(1, sizeof(*z)); | |
906 | z->node = GREP_NODE_OR; | |
907 | z->u.binary.left = left; | |
908 | z->u.binary.right = right; | |
909 | return z; | |
910 | } | |
911 | ||
95ce9ce2 | 912 | static struct grep_expr *prep_header_patterns(struct grep_opt *opt) |
83b5d2f5 JH |
913 | { |
914 | struct grep_pat *p; | |
95ce9ce2 | 915 | struct grep_expr *header_expr; |
5aaeb733 JH |
916 | struct grep_expr *(header_group[GREP_HEADER_FIELD_MAX]); |
917 | enum grep_header_field fld; | |
83b5d2f5 | 918 | |
95ce9ce2 JH |
919 | if (!opt->header_list) |
920 | return NULL; | |
2385f246 | 921 | |
95ce9ce2 JH |
922 | for (p = opt->header_list; p; p = p->next) { |
923 | if (p->token != GREP_PATTERN_HEAD) | |
033abf97 | 924 | BUG("a non-header pattern in grep header list."); |
3ce3ffb8 AP |
925 | if (p->field < GREP_HEADER_FIELD_MIN || |
926 | GREP_HEADER_FIELD_MAX <= p->field) | |
033abf97 | 927 | BUG("unknown header field %d", p->field); |
95ce9ce2 | 928 | compile_regexp(p, opt); |
80235ba7 | 929 | } |
5aaeb733 JH |
930 | |
931 | for (fld = 0; fld < GREP_HEADER_FIELD_MAX; fld++) | |
932 | header_group[fld] = NULL; | |
933 | ||
934 | for (p = opt->header_list; p; p = p->next) { | |
935 | struct grep_expr *h; | |
936 | struct grep_pat *pp = p; | |
937 | ||
938 | h = compile_pattern_atom(&pp); | |
939 | if (!h || pp != p->next) | |
033abf97 | 940 | BUG("malformed header expr"); |
5aaeb733 JH |
941 | if (!header_group[p->field]) { |
942 | header_group[p->field] = h; | |
943 | continue; | |
944 | } | |
945 | header_group[p->field] = grep_or_expr(h, header_group[p->field]); | |
946 | } | |
947 | ||
948 | header_expr = NULL; | |
949 | ||
950 | for (fld = 0; fld < GREP_HEADER_FIELD_MAX; fld++) { | |
951 | if (!header_group[fld]) | |
952 | continue; | |
953 | if (!header_expr) | |
954 | header_expr = grep_true_expr(); | |
955 | header_expr = grep_or_expr(header_group[fld], header_expr); | |
956 | } | |
95ce9ce2 JH |
957 | return header_expr; |
958 | } | |
959 | ||
13e4fc7e JH |
960 | static struct grep_expr *grep_splice_or(struct grep_expr *x, struct grep_expr *y) |
961 | { | |
962 | struct grep_expr *z = x; | |
963 | ||
964 | while (x) { | |
965 | assert(x->node == GREP_NODE_OR); | |
966 | if (x->u.binary.right && | |
967 | x->u.binary.right->node == GREP_NODE_TRUE) { | |
968 | x->u.binary.right = y; | |
969 | break; | |
970 | } | |
971 | x = x->u.binary.right; | |
972 | } | |
973 | return z; | |
974 | } | |
975 | ||
17bf35a3 | 976 | static void compile_grep_patterns_real(struct grep_opt *opt) |
95ce9ce2 JH |
977 | { |
978 | struct grep_pat *p; | |
979 | struct grep_expr *header_expr = prep_header_patterns(opt); | |
0ab7befa | 980 | |
83b5d2f5 | 981 | for (p = opt->pattern_list; p; p = p->next) { |
480c1ca6 JH |
982 | switch (p->token) { |
983 | case GREP_PATTERN: /* atom */ | |
984 | case GREP_PATTERN_HEAD: | |
985 | case GREP_PATTERN_BODY: | |
c822255c | 986 | compile_regexp(p, opt); |
480c1ca6 JH |
987 | break; |
988 | default: | |
83b5d2f5 | 989 | opt->extended = 1; |
480c1ca6 JH |
990 | break; |
991 | } | |
83b5d2f5 JH |
992 | } |
993 | ||
80235ba7 JH |
994 | if (opt->all_match || header_expr) |
995 | opt->extended = 1; | |
17bf35a3 | 996 | else if (!opt->extended && !opt->debug) |
83b5d2f5 JH |
997 | return; |
998 | ||
83b5d2f5 | 999 | p = opt->pattern_list; |
ba150a3f MB |
1000 | if (p) |
1001 | opt->pattern_expression = compile_pattern_expr(&p); | |
83b5d2f5 JH |
1002 | if (p) |
1003 | die("incomplete pattern expression: %s", p->pattern); | |
80235ba7 JH |
1004 | |
1005 | if (!header_expr) | |
1006 | return; | |
1007 | ||
5aaeb733 | 1008 | if (!opt->pattern_expression) |
80235ba7 | 1009 | opt->pattern_expression = header_expr; |
13e4fc7e JH |
1010 | else if (opt->all_match) |
1011 | opt->pattern_expression = grep_splice_or(header_expr, | |
1012 | opt->pattern_expression); | |
5aaeb733 JH |
1013 | else |
1014 | opt->pattern_expression = grep_or_expr(opt->pattern_expression, | |
1015 | header_expr); | |
80235ba7 | 1016 | opt->all_match = 1; |
83b5d2f5 JH |
1017 | } |
1018 | ||
17bf35a3 JH |
1019 | void compile_grep_patterns(struct grep_opt *opt) |
1020 | { | |
1021 | compile_grep_patterns_real(opt); | |
1022 | if (opt->debug) | |
1023 | dump_grep_expression(opt); | |
1024 | } | |
1025 | ||
b48fb5b6 JH |
1026 | static void free_pattern_expr(struct grep_expr *x) |
1027 | { | |
1028 | switch (x->node) { | |
5aaeb733 | 1029 | case GREP_NODE_TRUE: |
b48fb5b6 JH |
1030 | case GREP_NODE_ATOM: |
1031 | break; | |
1032 | case GREP_NODE_NOT: | |
1033 | free_pattern_expr(x->u.unary); | |
1034 | break; | |
1035 | case GREP_NODE_AND: | |
1036 | case GREP_NODE_OR: | |
1037 | free_pattern_expr(x->u.binary.left); | |
1038 | free_pattern_expr(x->u.binary.right); | |
1039 | break; | |
1040 | } | |
1041 | free(x); | |
1042 | } | |
1043 | ||
1044 | void free_grep_patterns(struct grep_opt *opt) | |
1045 | { | |
1046 | struct grep_pat *p, *n; | |
1047 | ||
1048 | for (p = opt->pattern_list; p; p = n) { | |
1049 | n = p->next; | |
1050 | switch (p->token) { | |
1051 | case GREP_PATTERN: /* atom */ | |
1052 | case GREP_PATTERN_HEAD: | |
1053 | case GREP_PATTERN_BODY: | |
9eceddee FK |
1054 | if (p->kws) |
1055 | kwsfree(p->kws); | |
6d4b5747 ÆAB |
1056 | else if (p->pcre1_regexp) |
1057 | free_pcre1_regexp(p); | |
94da9193 ÆAB |
1058 | else if (p->pcre2_pattern) |
1059 | free_pcre2_pattern(p); | |
63e7e9d8 MK |
1060 | else |
1061 | regfree(&p->regexp); | |
526a858a | 1062 | free(p->pattern); |
b48fb5b6 JH |
1063 | break; |
1064 | default: | |
1065 | break; | |
1066 | } | |
1067 | free(p); | |
1068 | } | |
1069 | ||
1070 | if (!opt->extended) | |
1071 | return; | |
1072 | free_pattern_expr(opt->pattern_expression); | |
1073 | } | |
1074 | ||
83b5d2f5 JH |
1075 | static char *end_of_line(char *cp, unsigned long *left) |
1076 | { | |
1077 | unsigned long l = *left; | |
1078 | while (l && *cp != '\n') { | |
1079 | l--; | |
1080 | cp++; | |
1081 | } | |
1082 | *left = l; | |
1083 | return cp; | |
1084 | } | |
1085 | ||
1086 | static int word_char(char ch) | |
1087 | { | |
1088 | return isalnum(ch) || ch == '_'; | |
1089 | } | |
1090 | ||
55f638bd ML |
1091 | static void output_color(struct grep_opt *opt, const void *data, size_t size, |
1092 | const char *color) | |
1093 | { | |
daa0c3d9 | 1094 | if (want_color(opt->color) && color && color[0]) { |
55f638bd ML |
1095 | opt->output(opt, color, strlen(color)); |
1096 | opt->output(opt, data, size); | |
1097 | opt->output(opt, GIT_COLOR_RESET, strlen(GIT_COLOR_RESET)); | |
1098 | } else | |
1099 | opt->output(opt, data, size); | |
1100 | } | |
1101 | ||
1102 | static void output_sep(struct grep_opt *opt, char sign) | |
1103 | { | |
1104 | if (opt->null_following_name) | |
1105 | opt->output(opt, "\0", 1); | |
1106 | else | |
fa151dc5 | 1107 | output_color(opt, &sign, 1, opt->colors[GREP_COLOR_SEP]); |
55f638bd ML |
1108 | } |
1109 | ||
83caecca RZ |
1110 | static void show_name(struct grep_opt *opt, const char *name) |
1111 | { | |
fa151dc5 | 1112 | output_color(opt, name, strlen(name), opt->colors[GREP_COLOR_FILENAME]); |
5b594f45 | 1113 | opt->output(opt, opt->null_following_name ? "\0" : "\n", 1); |
83caecca RZ |
1114 | } |
1115 | ||
ed40a095 RS |
1116 | static int fixmatch(struct grep_pat *p, char *line, char *eol, |
1117 | regmatch_t *match) | |
83b5d2f5 | 1118 | { |
9eceddee FK |
1119 | struct kwsmatch kwsm; |
1120 | size_t offset = kwsexec(p->kws, line, eol - line, &kwsm); | |
1121 | if (offset == -1) { | |
83b5d2f5 JH |
1122 | match->rm_so = match->rm_eo = -1; |
1123 | return REG_NOMATCH; | |
9eceddee FK |
1124 | } else { |
1125 | match->rm_so = offset; | |
1126 | match->rm_eo = match->rm_so + kwsm.size[0]; | |
83b5d2f5 JH |
1127 | return 0; |
1128 | } | |
1129 | } | |
1130 | ||
97e77784 MK |
1131 | static int patmatch(struct grep_pat *p, char *line, char *eol, |
1132 | regmatch_t *match, int eflags) | |
1133 | { | |
1134 | int hit; | |
1135 | ||
1136 | if (p->fixed) | |
1137 | hit = !fixmatch(p, line, eol, match); | |
6d4b5747 ÆAB |
1138 | else if (p->pcre1_regexp) |
1139 | hit = !pcre1match(p, line, eol, match, eflags); | |
94da9193 ÆAB |
1140 | else if (p->pcre2_pattern) |
1141 | hit = !pcre2match(p, line, eol, match, eflags); | |
97e77784 | 1142 | else |
b7d36ffc JS |
1143 | hit = !regexec_buf(&p->regexp, line, eol - line, 1, match, |
1144 | eflags); | |
97e77784 MK |
1145 | |
1146 | return hit; | |
1147 | } | |
1148 | ||
a4d7d2c6 JH |
1149 | static int strip_timestamp(char *bol, char **eol_p) |
1150 | { | |
1151 | char *eol = *eol_p; | |
1152 | int ch; | |
1153 | ||
1154 | while (bol < --eol) { | |
1155 | if (*eol != '>') | |
1156 | continue; | |
1157 | *eol_p = ++eol; | |
1158 | ch = *eol; | |
1159 | *eol = '\0'; | |
1160 | return ch; | |
1161 | } | |
1162 | return 0; | |
1163 | } | |
1164 | ||
1165 | static struct { | |
1166 | const char *field; | |
1167 | size_t len; | |
1168 | } header_field[] = { | |
1169 | { "author ", 7 }, | |
1170 | { "committer ", 10 }, | |
72fd13f7 | 1171 | { "reflog ", 7 }, |
a4d7d2c6 JH |
1172 | }; |
1173 | ||
d7eb527d | 1174 | static int match_one_pattern(struct grep_pat *p, char *bol, char *eol, |
79212772 RS |
1175 | enum grep_context ctx, |
1176 | regmatch_t *pmatch, int eflags) | |
83b5d2f5 JH |
1177 | { |
1178 | int hit = 0; | |
a4d7d2c6 | 1179 | int saved_ch = 0; |
e701fadb | 1180 | const char *start = bol; |
83b5d2f5 | 1181 | |
480c1ca6 JH |
1182 | if ((p->token != GREP_PATTERN) && |
1183 | ((p->token == GREP_PATTERN_HEAD) != (ctx == GREP_CONTEXT_HEAD))) | |
1184 | return 0; | |
1185 | ||
a4d7d2c6 JH |
1186 | if (p->token == GREP_PATTERN_HEAD) { |
1187 | const char *field; | |
1188 | size_t len; | |
1189 | assert(p->field < ARRAY_SIZE(header_field)); | |
1190 | field = header_field[p->field].field; | |
1191 | len = header_field[p->field].len; | |
1192 | if (strncmp(bol, field, len)) | |
1193 | return 0; | |
1194 | bol += len; | |
ad4813b3 NTND |
1195 | switch (p->field) { |
1196 | case GREP_HEADER_AUTHOR: | |
1197 | case GREP_HEADER_COMMITTER: | |
1198 | saved_ch = strip_timestamp(bol, &eol); | |
1199 | break; | |
1200 | default: | |
1201 | break; | |
1202 | } | |
a4d7d2c6 JH |
1203 | } |
1204 | ||
83b5d2f5 | 1205 | again: |
97e77784 | 1206 | hit = patmatch(p, bol, eol, pmatch, eflags); |
83b5d2f5 | 1207 | |
d7eb527d | 1208 | if (hit && p->word_regexp) { |
83b5d2f5 | 1209 | if ((pmatch[0].rm_so < 0) || |
84201eae | 1210 | (eol - bol) < pmatch[0].rm_so || |
83b5d2f5 JH |
1211 | (pmatch[0].rm_eo < 0) || |
1212 | (eol - bol) < pmatch[0].rm_eo) | |
1213 | die("regexp returned nonsense"); | |
1214 | ||
1215 | /* Match beginning must be either beginning of the | |
1216 | * line, or at word boundary (i.e. the last char must | |
1217 | * not be a word char). Similarly, match end must be | |
1218 | * either end of the line, or at word boundary | |
1219 | * (i.e. the next char must not be a word char). | |
1220 | */ | |
fb62eb7f | 1221 | if ( ((pmatch[0].rm_so == 0) || |
83b5d2f5 JH |
1222 | !word_char(bol[pmatch[0].rm_so-1])) && |
1223 | ((pmatch[0].rm_eo == (eol-bol)) || | |
1224 | !word_char(bol[pmatch[0].rm_eo])) ) | |
1225 | ; | |
1226 | else | |
1227 | hit = 0; | |
1228 | ||
84201eae RS |
1229 | /* Words consist of at least one character. */ |
1230 | if (pmatch->rm_so == pmatch->rm_eo) | |
1231 | hit = 0; | |
1232 | ||
83b5d2f5 JH |
1233 | if (!hit && pmatch[0].rm_so + bol + 1 < eol) { |
1234 | /* There could be more than one match on the | |
1235 | * line, and the first match might not be | |
1236 | * strict word match. But later ones could be! | |
fb62eb7f RS |
1237 | * Forward to the next possible start, i.e. the |
1238 | * next position following a non-word char. | |
83b5d2f5 JH |
1239 | */ |
1240 | bol = pmatch[0].rm_so + bol + 1; | |
fb62eb7f RS |
1241 | while (word_char(bol[-1]) && bol < eol) |
1242 | bol++; | |
dbb6a4ad | 1243 | eflags |= REG_NOTBOL; |
fb62eb7f RS |
1244 | if (bol < eol) |
1245 | goto again; | |
83b5d2f5 JH |
1246 | } |
1247 | } | |
a4d7d2c6 JH |
1248 | if (p->token == GREP_PATTERN_HEAD && saved_ch) |
1249 | *eol = saved_ch; | |
e701fadb RS |
1250 | if (hit) { |
1251 | pmatch[0].rm_so += bol - start; | |
1252 | pmatch[0].rm_eo += bol - start; | |
1253 | } | |
83b5d2f5 JH |
1254 | return hit; |
1255 | } | |
1256 | ||
68d686e6 TB |
1257 | static int match_expr_eval(struct grep_opt *opt, struct grep_expr *x, char *bol, |
1258 | char *eol, enum grep_context ctx, ssize_t *col, | |
1259 | ssize_t *icol, int collect_hits) | |
83b5d2f5 | 1260 | { |
0ab7befa JH |
1261 | int h = 0; |
1262 | ||
c922b01f LT |
1263 | if (!x) |
1264 | die("Not a valid grep expression"); | |
83b5d2f5 | 1265 | switch (x->node) { |
5aaeb733 JH |
1266 | case GREP_NODE_TRUE: |
1267 | h = 1; | |
1268 | break; | |
83b5d2f5 | 1269 | case GREP_NODE_ATOM: |
68d686e6 TB |
1270 | { |
1271 | regmatch_t tmp; | |
1272 | h = match_one_pattern(x->u.atom, bol, eol, ctx, | |
1273 | &tmp, 0); | |
1274 | if (h && (*col < 0 || tmp.rm_so < *col)) | |
1275 | *col = tmp.rm_so; | |
1276 | } | |
83b5d2f5 JH |
1277 | break; |
1278 | case GREP_NODE_NOT: | |
68d686e6 TB |
1279 | /* |
1280 | * Upon visiting a GREP_NODE_NOT, col and icol become swapped. | |
1281 | */ | |
1282 | h = !match_expr_eval(opt, x->u.unary, bol, eol, ctx, icol, col, | |
1283 | 0); | |
0ab7befa | 1284 | break; |
83b5d2f5 | 1285 | case GREP_NODE_AND: |
017c0fcf | 1286 | h = match_expr_eval(opt, x->u.binary.left, bol, eol, ctx, col, |
68d686e6 | 1287 | icol, 0); |
017c0fcf TB |
1288 | if (h || opt->columnnum) { |
1289 | /* | |
1290 | * Don't short-circuit AND when given --column, since a | |
1291 | * NOT earlier in the tree may turn this into an OR. In | |
1292 | * this case, see the below comment. | |
1293 | */ | |
1294 | h &= match_expr_eval(opt, x->u.binary.right, bol, eol, | |
1295 | ctx, col, icol, 0); | |
1296 | } | |
0ab7befa | 1297 | break; |
83b5d2f5 | 1298 | case GREP_NODE_OR: |
017c0fcf TB |
1299 | if (!(collect_hits || opt->columnnum)) { |
1300 | /* | |
1301 | * Don't short-circuit OR when given --column (or | |
1302 | * collecting hits) to ensure we don't skip a later | |
1303 | * child that would produce an earlier match. | |
1304 | */ | |
68d686e6 TB |
1305 | return (match_expr_eval(opt, x->u.binary.left, bol, eol, |
1306 | ctx, col, icol, 0) || | |
1307 | match_expr_eval(opt, x->u.binary.right, bol, | |
1308 | eol, ctx, col, icol, 0)); | |
017c0fcf | 1309 | } |
68d686e6 TB |
1310 | h = match_expr_eval(opt, x->u.binary.left, bol, eol, ctx, col, |
1311 | icol, 0); | |
017c0fcf TB |
1312 | if (collect_hits) |
1313 | x->u.binary.left->hit |= h; | |
68d686e6 | 1314 | h |= match_expr_eval(opt, x->u.binary.right, bol, eol, ctx, col, |
017c0fcf | 1315 | icol, collect_hits); |
0ab7befa JH |
1316 | break; |
1317 | default: | |
d7530708 | 1318 | die("Unexpected node type (internal error) %d", x->node); |
83b5d2f5 | 1319 | } |
0ab7befa JH |
1320 | if (collect_hits) |
1321 | x->hit |= h; | |
1322 | return h; | |
83b5d2f5 JH |
1323 | } |
1324 | ||
480c1ca6 | 1325 | static int match_expr(struct grep_opt *opt, char *bol, char *eol, |
68d686e6 TB |
1326 | enum grep_context ctx, ssize_t *col, |
1327 | ssize_t *icol, int collect_hits) | |
83b5d2f5 JH |
1328 | { |
1329 | struct grep_expr *x = opt->pattern_expression; | |
68d686e6 | 1330 | return match_expr_eval(opt, x, bol, eol, ctx, col, icol, collect_hits); |
83b5d2f5 JH |
1331 | } |
1332 | ||
480c1ca6 | 1333 | static int match_line(struct grep_opt *opt, char *bol, char *eol, |
68d686e6 | 1334 | ssize_t *col, ssize_t *icol, |
0ab7befa | 1335 | enum grep_context ctx, int collect_hits) |
83b5d2f5 JH |
1336 | { |
1337 | struct grep_pat *p; | |
017c0fcf | 1338 | int hit = 0; |
79212772 | 1339 | |
83b5d2f5 | 1340 | if (opt->extended) |
68d686e6 TB |
1341 | return match_expr(opt, bol, eol, ctx, col, icol, |
1342 | collect_hits); | |
0ab7befa JH |
1343 | |
1344 | /* we do not call with collect_hits without being extended */ | |
83b5d2f5 | 1345 | for (p = opt->pattern_list; p; p = p->next) { |
68d686e6 TB |
1346 | regmatch_t tmp; |
1347 | if (match_one_pattern(p, bol, eol, ctx, &tmp, 0)) { | |
017c0fcf TB |
1348 | hit |= 1; |
1349 | if (!opt->columnnum) { | |
1350 | /* | |
1351 | * Without --column, any single match on a line | |
1352 | * is enough to know that it needs to be | |
1353 | * printed. With --column, scan _all_ patterns | |
1354 | * to find the earliest. | |
1355 | */ | |
1356 | break; | |
1357 | } | |
1358 | if (*col < 0 || tmp.rm_so < *col) | |
1359 | *col = tmp.rm_so; | |
68d686e6 | 1360 | } |
83b5d2f5 | 1361 | } |
017c0fcf | 1362 | return hit; |
83b5d2f5 JH |
1363 | } |
1364 | ||
7e8f59d5 RS |
1365 | static int match_next_pattern(struct grep_pat *p, char *bol, char *eol, |
1366 | enum grep_context ctx, | |
1367 | regmatch_t *pmatch, int eflags) | |
1368 | { | |
1369 | regmatch_t match; | |
1370 | ||
1371 | if (!match_one_pattern(p, bol, eol, ctx, &match, eflags)) | |
1372 | return 0; | |
1373 | if (match.rm_so < 0 || match.rm_eo < 0) | |
1374 | return 0; | |
1375 | if (pmatch->rm_so >= 0 && pmatch->rm_eo >= 0) { | |
1376 | if (match.rm_so > pmatch->rm_so) | |
1377 | return 1; | |
1378 | if (match.rm_so == pmatch->rm_so && match.rm_eo < pmatch->rm_eo) | |
1379 | return 1; | |
1380 | } | |
1381 | pmatch->rm_so = match.rm_so; | |
1382 | pmatch->rm_eo = match.rm_eo; | |
1383 | return 1; | |
1384 | } | |
1385 | ||
1386 | static int next_match(struct grep_opt *opt, char *bol, char *eol, | |
1387 | enum grep_context ctx, regmatch_t *pmatch, int eflags) | |
1388 | { | |
1389 | struct grep_pat *p; | |
1390 | int hit = 0; | |
1391 | ||
1392 | pmatch->rm_so = pmatch->rm_eo = -1; | |
1393 | if (bol < eol) { | |
1394 | for (p = opt->pattern_list; p; p = p->next) { | |
1395 | switch (p->token) { | |
1396 | case GREP_PATTERN: /* atom */ | |
1397 | case GREP_PATTERN_HEAD: | |
1398 | case GREP_PATTERN_BODY: | |
1399 | hit |= match_next_pattern(p, bol, eol, ctx, | |
1400 | pmatch, eflags); | |
1401 | break; | |
1402 | default: | |
1403 | break; | |
1404 | } | |
1405 | } | |
1406 | } | |
1407 | return hit; | |
1408 | } | |
1409 | ||
c707ded3 TB |
1410 | static void show_line_header(struct grep_opt *opt, const char *name, |
1411 | unsigned lno, ssize_t cno, char sign) | |
7e8f59d5 | 1412 | { |
1d84f72e | 1413 | if (opt->heading && opt->last_shown == 0) { |
fa151dc5 | 1414 | output_color(opt, name, strlen(name), opt->colors[GREP_COLOR_FILENAME]); |
1d84f72e RS |
1415 | opt->output(opt, "\n", 1); |
1416 | } | |
5dd06d38 RS |
1417 | opt->last_shown = lno; |
1418 | ||
1d84f72e | 1419 | if (!opt->heading && opt->pathname) { |
fa151dc5 | 1420 | output_color(opt, name, strlen(name), opt->colors[GREP_COLOR_FILENAME]); |
55f638bd | 1421 | output_sep(opt, sign); |
5b594f45 FK |
1422 | } |
1423 | if (opt->linenum) { | |
1424 | char buf[32]; | |
1a168e5c | 1425 | xsnprintf(buf, sizeof(buf), "%d", lno); |
fa151dc5 | 1426 | output_color(opt, buf, strlen(buf), opt->colors[GREP_COLOR_LINENO]); |
55f638bd | 1427 | output_sep(opt, sign); |
5b594f45 | 1428 | } |
89252cd0 TB |
1429 | /* |
1430 | * Treat 'cno' as the 1-indexed offset from the start of a non-context | |
1431 | * line to its first match. Otherwise, 'cno' is 0 indicating that we are | |
1432 | * being called with a context line. | |
1433 | */ | |
1434 | if (opt->columnnum && cno) { | |
1435 | char buf[32]; | |
1436 | xsnprintf(buf, sizeof(buf), "%"PRIuMAX, (uintmax_t)cno); | |
d036d667 | 1437 | output_color(opt, buf, strlen(buf), opt->colors[GREP_COLOR_COLUMNNO]); |
89252cd0 TB |
1438 | output_sep(opt, sign); |
1439 | } | |
c707ded3 TB |
1440 | } |
1441 | ||
1442 | static void show_line(struct grep_opt *opt, char *bol, char *eol, | |
1443 | const char *name, unsigned lno, ssize_t cno, char sign) | |
1444 | { | |
1445 | int rest = eol - bol; | |
9d8db06e TB |
1446 | const char *match_color = NULL; |
1447 | const char *line_color = NULL; | |
c707ded3 TB |
1448 | |
1449 | if (opt->file_break && opt->last_shown == 0) { | |
1450 | if (opt->show_hunk_mark) | |
1451 | opt->output(opt, "\n", 1); | |
1452 | } else if (opt->pre_context || opt->post_context || opt->funcbody) { | |
1453 | if (opt->last_shown == 0) { | |
1454 | if (opt->show_hunk_mark) { | |
87ece7ce | 1455 | output_color(opt, "--", 2, opt->colors[GREP_COLOR_SEP]); |
c707ded3 TB |
1456 | opt->output(opt, "\n", 1); |
1457 | } | |
1458 | } else if (lno > opt->last_shown + 1) { | |
87ece7ce | 1459 | output_color(opt, "--", 2, opt->colors[GREP_COLOR_SEP]); |
c707ded3 TB |
1460 | opt->output(opt, "\n", 1); |
1461 | } | |
1462 | } | |
9d8db06e TB |
1463 | if (!opt->only_matching) { |
1464 | /* | |
1465 | * In case the line we're being called with contains more than | |
1466 | * one match, leave printing each header to the loop below. | |
1467 | */ | |
1468 | show_line_header(opt, name, lno, cno, sign); | |
1469 | } | |
1470 | if (opt->color || opt->only_matching) { | |
7e8f59d5 RS |
1471 | regmatch_t match; |
1472 | enum grep_context ctx = GREP_CONTEXT_BODY; | |
1473 | int ch = *eol; | |
1474 | int eflags = 0; | |
1475 | ||
9d8db06e TB |
1476 | if (opt->color) { |
1477 | if (sign == ':') | |
87ece7ce | 1478 | match_color = opt->colors[GREP_COLOR_MATCH_SELECTED]; |
9d8db06e | 1479 | else |
87ece7ce | 1480 | match_color = opt->colors[GREP_COLOR_MATCH_CONTEXT]; |
9d8db06e | 1481 | if (sign == ':') |
87ece7ce | 1482 | line_color = opt->colors[GREP_COLOR_SELECTED]; |
9d8db06e | 1483 | else if (sign == '-') |
87ece7ce | 1484 | line_color = opt->colors[GREP_COLOR_CONTEXT]; |
9d8db06e | 1485 | else if (sign == '=') |
87ece7ce | 1486 | line_color = opt->colors[GREP_COLOR_FUNCTION]; |
9d8db06e | 1487 | } |
7e8f59d5 RS |
1488 | *eol = '\0'; |
1489 | while (next_match(opt, bol, eol, ctx, &match, eflags)) { | |
1f5b9cc4 RS |
1490 | if (match.rm_so == match.rm_eo) |
1491 | break; | |
5b594f45 | 1492 | |
9d8db06e TB |
1493 | if (opt->only_matching) |
1494 | show_line_header(opt, name, lno, cno, sign); | |
1495 | else | |
1496 | output_color(opt, bol, match.rm_so, line_color); | |
55f638bd | 1497 | output_color(opt, bol + match.rm_so, |
79a77109 | 1498 | match.rm_eo - match.rm_so, match_color); |
9d8db06e TB |
1499 | if (opt->only_matching) |
1500 | opt->output(opt, "\n", 1); | |
7e8f59d5 | 1501 | bol += match.rm_eo; |
9d8db06e | 1502 | cno += match.rm_eo; |
7e8f59d5 RS |
1503 | rest -= match.rm_eo; |
1504 | eflags = REG_NOTBOL; | |
1505 | } | |
1506 | *eol = ch; | |
1507 | } | |
9d8db06e TB |
1508 | if (!opt->only_matching) { |
1509 | output_color(opt, bol, rest, line_color); | |
1510 | opt->output(opt, "\n", 1); | |
1511 | } | |
7e8f59d5 RS |
1512 | } |
1513 | ||
78db6ea9 JK |
1514 | int grep_use_locks; |
1515 | ||
0579f91d TR |
1516 | /* |
1517 | * This lock protects access to the gitattributes machinery, which is | |
1518 | * not thread-safe. | |
1519 | */ | |
1520 | pthread_mutex_t grep_attr_mutex; | |
1521 | ||
78db6ea9 | 1522 | static inline void grep_attr_lock(void) |
0579f91d | 1523 | { |
78db6ea9 | 1524 | if (grep_use_locks) |
0579f91d TR |
1525 | pthread_mutex_lock(&grep_attr_mutex); |
1526 | } | |
1527 | ||
78db6ea9 | 1528 | static inline void grep_attr_unlock(void) |
0579f91d | 1529 | { |
78db6ea9 | 1530 | if (grep_use_locks) |
0579f91d TR |
1531 | pthread_mutex_unlock(&grep_attr_mutex); |
1532 | } | |
b3aeb285 JK |
1533 | |
1534 | /* | |
1535 | * Same as git_attr_mutex, but protecting the thread-unsafe object db access. | |
1536 | */ | |
1537 | pthread_mutex_t grep_read_mutex; | |
1538 | ||
e1327023 | 1539 | static int match_funcname(struct grep_opt *opt, struct grep_source *gs, char *bol, char *eol) |
2944e4e6 | 1540 | { |
60ecac98 | 1541 | xdemitconf_t *xecfg = opt->priv; |
0579f91d | 1542 | if (xecfg && !xecfg->find_func) { |
acd00ea0 | 1543 | grep_source_load_driver(gs, opt->repo->index); |
94ad9d9e JK |
1544 | if (gs->driver->funcname.pattern) { |
1545 | const struct userdiff_funcname *pe = &gs->driver->funcname; | |
0579f91d TR |
1546 | xdiff_set_find_func(xecfg, pe->pattern, pe->cflags); |
1547 | } else { | |
1548 | xecfg = opt->priv = NULL; | |
1549 | } | |
1550 | } | |
1551 | ||
1552 | if (xecfg) { | |
60ecac98 RS |
1553 | char buf[1]; |
1554 | return xecfg->find_func(bol, eol - bol, buf, 1, | |
1555 | xecfg->find_func_priv) >= 0; | |
1556 | } | |
1557 | ||
2944e4e6 RS |
1558 | if (bol == eol) |
1559 | return 0; | |
1560 | if (isalpha(*bol) || *bol == '_' || *bol == '$') | |
1561 | return 1; | |
1562 | return 0; | |
1563 | } | |
1564 | ||
e1327023 JK |
1565 | static void show_funcname_line(struct grep_opt *opt, struct grep_source *gs, |
1566 | char *bol, unsigned lno) | |
2944e4e6 | 1567 | { |
e1327023 | 1568 | while (bol > gs->buf) { |
2944e4e6 RS |
1569 | char *eol = --bol; |
1570 | ||
e1327023 | 1571 | while (bol > gs->buf && bol[-1] != '\n') |
2944e4e6 RS |
1572 | bol--; |
1573 | lno--; | |
1574 | ||
1575 | if (lno <= opt->last_shown) | |
1576 | break; | |
1577 | ||
e1327023 | 1578 | if (match_funcname(opt, gs, bol, eol)) { |
89252cd0 | 1579 | show_line(opt, bol, eol, gs->name, lno, 0, '='); |
2944e4e6 RS |
1580 | break; |
1581 | } | |
1582 | } | |
1583 | } | |
1584 | ||
a5dc20b0 RS |
1585 | static int is_empty_line(const char *bol, const char *eol); |
1586 | ||
e1327023 | 1587 | static void show_pre_context(struct grep_opt *opt, struct grep_source *gs, |
ba8ea749 | 1588 | char *bol, char *end, unsigned lno) |
49de3216 | 1589 | { |
6653a01b | 1590 | unsigned cur = lno, from = 1, funcname_lno = 0, orig_from; |
a5dc20b0 | 1591 | int funcname_needed = !!opt->funcname, comment_needed = 0; |
ba8ea749 | 1592 | |
49de3216 RS |
1593 | if (opt->pre_context < lno) |
1594 | from = lno - opt->pre_context; | |
1595 | if (from <= opt->last_shown) | |
1596 | from = opt->last_shown + 1; | |
6653a01b | 1597 | orig_from = from; |
a5dc20b0 RS |
1598 | if (opt->funcbody) { |
1599 | if (match_funcname(opt, gs, bol, end)) | |
1600 | comment_needed = 1; | |
1601 | else | |
1602 | funcname_needed = 1; | |
6653a01b RS |
1603 | from = opt->last_shown + 1; |
1604 | } | |
49de3216 RS |
1605 | |
1606 | /* Rewind. */ | |
6653a01b | 1607 | while (bol > gs->buf && cur > from) { |
a5dc20b0 | 1608 | char *next_bol = bol; |
2944e4e6 RS |
1609 | char *eol = --bol; |
1610 | ||
e1327023 | 1611 | while (bol > gs->buf && bol[-1] != '\n') |
49de3216 RS |
1612 | bol--; |
1613 | cur--; | |
a5dc20b0 RS |
1614 | if (comment_needed && (is_empty_line(bol, eol) || |
1615 | match_funcname(opt, gs, bol, eol))) { | |
1616 | comment_needed = 0; | |
1617 | from = orig_from; | |
1618 | if (cur < from) { | |
1619 | cur++; | |
1620 | bol = next_bol; | |
1621 | break; | |
1622 | } | |
1623 | } | |
e1327023 | 1624 | if (funcname_needed && match_funcname(opt, gs, bol, eol)) { |
2944e4e6 RS |
1625 | funcname_lno = cur; |
1626 | funcname_needed = 0; | |
a5dc20b0 RS |
1627 | if (opt->funcbody) |
1628 | comment_needed = 1; | |
1629 | else | |
1630 | from = orig_from; | |
2944e4e6 | 1631 | } |
49de3216 RS |
1632 | } |
1633 | ||
2944e4e6 RS |
1634 | /* We need to look even further back to find a function signature. */ |
1635 | if (opt->funcname && funcname_needed) | |
e1327023 | 1636 | show_funcname_line(opt, gs, bol, cur); |
2944e4e6 | 1637 | |
49de3216 RS |
1638 | /* Back forward. */ |
1639 | while (cur < lno) { | |
2944e4e6 | 1640 | char *eol = bol, sign = (cur == funcname_lno) ? '=' : '-'; |
49de3216 RS |
1641 | |
1642 | while (*eol != '\n') | |
1643 | eol++; | |
89252cd0 | 1644 | show_line(opt, bol, eol, gs->name, cur, 0, sign); |
49de3216 RS |
1645 | bol = eol + 1; |
1646 | cur++; | |
1647 | } | |
1648 | } | |
1649 | ||
a26345b6 JH |
1650 | static int should_lookahead(struct grep_opt *opt) |
1651 | { | |
1652 | struct grep_pat *p; | |
1653 | ||
1654 | if (opt->extended) | |
1655 | return 0; /* punt for too complex stuff */ | |
1656 | if (opt->invert) | |
1657 | return 0; | |
1658 | for (p = opt->pattern_list; p; p = p->next) { | |
1659 | if (p->token != GREP_PATTERN) | |
1660 | return 0; /* punt for "header only" and stuff */ | |
1661 | } | |
1662 | return 1; | |
1663 | } | |
1664 | ||
1665 | static int look_ahead(struct grep_opt *opt, | |
1666 | unsigned long *left_p, | |
1667 | unsigned *lno_p, | |
1668 | char **bol_p) | |
1669 | { | |
1670 | unsigned lno = *lno_p; | |
1671 | char *bol = *bol_p; | |
1672 | struct grep_pat *p; | |
1673 | char *sp, *last_bol; | |
1674 | regoff_t earliest = -1; | |
1675 | ||
1676 | for (p = opt->pattern_list; p; p = p->next) { | |
1677 | int hit; | |
1678 | regmatch_t m; | |
1679 | ||
97e77784 | 1680 | hit = patmatch(p, bol, bol + *left_p, &m, 0); |
a26345b6 JH |
1681 | if (!hit || m.rm_so < 0 || m.rm_eo < 0) |
1682 | continue; | |
1683 | if (earliest < 0 || m.rm_so < earliest) | |
1684 | earliest = m.rm_so; | |
1685 | } | |
1686 | ||
1687 | if (earliest < 0) { | |
1688 | *bol_p = bol + *left_p; | |
1689 | *left_p = 0; | |
1690 | return 1; | |
1691 | } | |
1692 | for (sp = bol + earliest; bol < sp && sp[-1] != '\n'; sp--) | |
1693 | ; /* find the beginning of the line */ | |
1694 | last_bol = sp; | |
1695 | ||
1696 | for (sp = bol; sp < last_bol; sp++) { | |
1697 | if (*sp == '\n') | |
1698 | lno++; | |
1699 | } | |
1700 | *left_p -= last_bol - bol; | |
1701 | *bol_p = last_bol; | |
1702 | *lno_p = lno; | |
1703 | return 0; | |
1704 | } | |
1705 | ||
38bbc2ea NTND |
1706 | static int fill_textconv_grep(struct repository *r, |
1707 | struct userdiff_driver *driver, | |
335ec3bf JK |
1708 | struct grep_source *gs) |
1709 | { | |
1710 | struct diff_filespec *df; | |
1711 | char *buf; | |
1712 | size_t size; | |
1713 | ||
1714 | if (!driver || !driver->textconv) | |
1715 | return grep_source_load(gs); | |
1716 | ||
1717 | /* | |
1718 | * The textconv interface is intimately tied to diff_filespecs, so we | |
1719 | * have to pretend to be one. If we could unify the grep_source | |
1720 | * and diff_filespec structs, this mess could just go away. | |
1721 | */ | |
1722 | df = alloc_filespec(gs->path); | |
1723 | switch (gs->type) { | |
1c41c82b | 1724 | case GREP_SOURCE_OID: |
335ec3bf JK |
1725 | fill_filespec(df, gs->identifier, 1, 0100644); |
1726 | break; | |
1727 | case GREP_SOURCE_FILE: | |
f9704c2d | 1728 | fill_filespec(df, &null_oid, 0, 0100644); |
335ec3bf JK |
1729 | break; |
1730 | default: | |
033abf97 | 1731 | BUG("attempt to textconv something without a path?"); |
335ec3bf JK |
1732 | } |
1733 | ||
1734 | /* | |
1735 | * fill_textconv is not remotely thread-safe; it may load objects | |
1736 | * behind the scenes, and it modifies the global diff tempfile | |
1737 | * structure. | |
1738 | */ | |
1739 | grep_read_lock(); | |
38bbc2ea | 1740 | size = fill_textconv(r, driver, df, &buf); |
335ec3bf JK |
1741 | grep_read_unlock(); |
1742 | free_filespec(df); | |
1743 | ||
1744 | /* | |
1745 | * The normal fill_textconv usage by the diff machinery would just keep | |
1746 | * the textconv'd buf separate from the diff_filespec. But much of the | |
1747 | * grep code passes around a grep_source and assumes that its "buf" | |
1748 | * pointer is the beginning of the thing we are searching. So let's | |
1749 | * install our textconv'd version into the grep_source, taking care not | |
1750 | * to leak any existing buffer. | |
1751 | */ | |
1752 | grep_source_clear_data(gs); | |
1753 | gs->buf = buf; | |
1754 | gs->size = size; | |
1755 | ||
1756 | return 0; | |
1757 | } | |
1758 | ||
4aa2c475 RS |
1759 | static int is_empty_line(const char *bol, const char *eol) |
1760 | { | |
1761 | while (bol < eol && isspace(*bol)) | |
1762 | bol++; | |
1763 | return bol == eol; | |
1764 | } | |
1765 | ||
e1327023 | 1766 | static int grep_source_1(struct grep_opt *opt, struct grep_source *gs, int collect_hits) |
83b5d2f5 | 1767 | { |
e1327023 | 1768 | char *bol; |
4aa2c475 | 1769 | char *peek_bol = NULL; |
e1327023 | 1770 | unsigned long left; |
83b5d2f5 | 1771 | unsigned lno = 1; |
83b5d2f5 | 1772 | unsigned last_hit = 0; |
83b5d2f5 | 1773 | int binary_match_only = 0; |
83b5d2f5 | 1774 | unsigned count = 0; |
a26345b6 | 1775 | int try_lookahead = 0; |
ba8ea749 | 1776 | int show_function = 0; |
335ec3bf | 1777 | struct userdiff_driver *textconv = NULL; |
480c1ca6 | 1778 | enum grep_context ctx = GREP_CONTEXT_HEAD; |
60ecac98 | 1779 | xdemitconf_t xecfg; |
83b5d2f5 | 1780 | |
de99eb0c ES |
1781 | if (!opt->status_only && gs->name == NULL) |
1782 | BUG("grep call which could print a name requires " | |
1783 | "grep_source.name be non-NULL"); | |
1784 | ||
5b594f45 FK |
1785 | if (!opt->output) |
1786 | opt->output = std_output; | |
1787 | ||
ba8ea749 RS |
1788 | if (opt->pre_context || opt->post_context || opt->file_break || |
1789 | opt->funcbody) { | |
08303c36 RS |
1790 | /* Show hunk marks, except for the first file. */ |
1791 | if (opt->last_shown) | |
1792 | opt->show_hunk_mark = 1; | |
1793 | /* | |
1794 | * If we're using threads then we can't easily identify | |
1795 | * the first file. Always put hunk marks in that case | |
1796 | * and skip the very first one later in work_done(). | |
1797 | */ | |
1798 | if (opt->output != std_output) | |
1799 | opt->show_hunk_mark = 1; | |
1800 | } | |
431d6e7b RS |
1801 | opt->last_shown = 0; |
1802 | ||
335ec3bf | 1803 | if (opt->allow_textconv) { |
acd00ea0 | 1804 | grep_source_load_driver(gs, opt->repo->index); |
335ec3bf JK |
1805 | /* |
1806 | * We might set up the shared textconv cache data here, which | |
1807 | * is not thread-safe. | |
1808 | */ | |
1809 | grep_attr_lock(); | |
bd7ad45b | 1810 | textconv = userdiff_get_textconv(opt->repo, gs->driver); |
335ec3bf JK |
1811 | grep_attr_unlock(); |
1812 | } | |
1813 | ||
1814 | /* | |
1815 | * We know the result of a textconv is text, so we only have to care | |
1816 | * about binary handling if we are not using it. | |
1817 | */ | |
1818 | if (!textconv) { | |
1819 | switch (opt->binary) { | |
1820 | case GREP_BINARY_DEFAULT: | |
acd00ea0 | 1821 | if (grep_source_is_binary(gs, opt->repo->index)) |
335ec3bf JK |
1822 | binary_match_only = 1; |
1823 | break; | |
1824 | case GREP_BINARY_NOMATCH: | |
acd00ea0 | 1825 | if (grep_source_is_binary(gs, opt->repo->index)) |
335ec3bf JK |
1826 | return 0; /* Assume unmatch */ |
1827 | break; | |
1828 | case GREP_BINARY_TEXT: | |
1829 | break; | |
1830 | default: | |
033abf97 | 1831 | BUG("unknown binary handling mode"); |
335ec3bf | 1832 | } |
83b5d2f5 JH |
1833 | } |
1834 | ||
60ecac98 | 1835 | memset(&xecfg, 0, sizeof(xecfg)); |
0579f91d TR |
1836 | opt->priv = &xecfg; |
1837 | ||
a26345b6 | 1838 | try_lookahead = should_lookahead(opt); |
60ecac98 | 1839 | |
38bbc2ea | 1840 | if (fill_textconv_grep(opt->repo, textconv, gs) < 0) |
08265798 JK |
1841 | return 0; |
1842 | ||
e1327023 JK |
1843 | bol = gs->buf; |
1844 | left = gs->size; | |
83b5d2f5 JH |
1845 | while (left) { |
1846 | char *eol, ch; | |
0ab7befa | 1847 | int hit; |
89252cd0 | 1848 | ssize_t cno; |
68d686e6 | 1849 | ssize_t col = -1, icol = -1; |
83b5d2f5 | 1850 | |
a26345b6 | 1851 | /* |
8997da38 | 1852 | * look_ahead() skips quickly to the line that possibly |
a26345b6 JH |
1853 | * has the next hit; don't call it if we need to do |
1854 | * something more than just skipping the current line | |
1855 | * in response to an unmatch for the current line. E.g. | |
1856 | * inside a post-context window, we will show the current | |
1857 | * line as a context around the previous hit when it | |
1858 | * doesn't hit. | |
1859 | */ | |
1860 | if (try_lookahead | |
1861 | && !(last_hit | |
ba8ea749 RS |
1862 | && (show_function || |
1863 | lno <= last_hit + opt->post_context)) | |
a26345b6 JH |
1864 | && look_ahead(opt, &left, &lno, &bol)) |
1865 | break; | |
83b5d2f5 JH |
1866 | eol = end_of_line(bol, &left); |
1867 | ch = *eol; | |
1868 | *eol = 0; | |
1869 | ||
480c1ca6 JH |
1870 | if ((ctx == GREP_CONTEXT_HEAD) && (eol == bol)) |
1871 | ctx = GREP_CONTEXT_BODY; | |
1872 | ||
68d686e6 | 1873 | hit = match_line(opt, bol, eol, &col, &icol, ctx, collect_hits); |
83b5d2f5 JH |
1874 | *eol = ch; |
1875 | ||
0ab7befa JH |
1876 | if (collect_hits) |
1877 | goto next_line; | |
1878 | ||
83b5d2f5 JH |
1879 | /* "grep -v -e foo -e bla" should list lines |
1880 | * that do not have either, so inversion should | |
1881 | * be done outside. | |
1882 | */ | |
1883 | if (opt->invert) | |
1884 | hit = !hit; | |
1885 | if (opt->unmatch_name_only) { | |
1886 | if (hit) | |
1887 | return 0; | |
1888 | goto next_line; | |
1889 | } | |
1890 | if (hit) { | |
1891 | count++; | |
1892 | if (opt->status_only) | |
1893 | return 1; | |
321ffcc0 | 1894 | if (opt->name_only) { |
e1327023 | 1895 | show_name(opt, gs->name); |
321ffcc0 RS |
1896 | return 1; |
1897 | } | |
c30c10cf RS |
1898 | if (opt->count) |
1899 | goto next_line; | |
83b5d2f5 | 1900 | if (binary_match_only) { |
5b594f45 | 1901 | opt->output(opt, "Binary file ", 12); |
e1327023 | 1902 | output_color(opt, gs->name, strlen(gs->name), |
fa151dc5 | 1903 | opt->colors[GREP_COLOR_FILENAME]); |
5b594f45 | 1904 | opt->output(opt, " matches\n", 9); |
83b5d2f5 JH |
1905 | return 1; |
1906 | } | |
83b5d2f5 JH |
1907 | /* Hit at this line. If we haven't shown the |
1908 | * pre-context lines, we would need to show them. | |
83b5d2f5 | 1909 | */ |
ba8ea749 | 1910 | if (opt->pre_context || opt->funcbody) |
e1327023 | 1911 | show_pre_context(opt, gs, bol, eol, lno); |
2944e4e6 | 1912 | else if (opt->funcname) |
e1327023 | 1913 | show_funcname_line(opt, gs, bol, lno); |
89252cd0 TB |
1914 | cno = opt->invert ? icol : col; |
1915 | if (cno < 0) { | |
1916 | /* | |
1917 | * A negative cno indicates that there was no | |
1918 | * match on the line. We are thus inverted and | |
1919 | * being asked to show all lines that _don't_ | |
1920 | * match a given expression. Therefore, set cno | |
1921 | * to 0 to suggest the whole line matches. | |
1922 | */ | |
1923 | cno = 0; | |
1924 | } | |
1925 | show_line(opt, bol, eol, gs->name, lno, cno + 1, ':'); | |
5dd06d38 | 1926 | last_hit = lno; |
ba8ea749 RS |
1927 | if (opt->funcbody) |
1928 | show_function = 1; | |
1929 | goto next_line; | |
83b5d2f5 | 1930 | } |
4aa2c475 RS |
1931 | if (show_function && (!peek_bol || peek_bol < bol)) { |
1932 | unsigned long peek_left = left; | |
1933 | char *peek_eol = eol; | |
1934 | ||
1935 | /* | |
1936 | * Trailing empty lines are not interesting. | |
1937 | * Peek past them to see if they belong to the | |
1938 | * body of the current function. | |
1939 | */ | |
1940 | peek_bol = bol; | |
1941 | while (is_empty_line(peek_bol, peek_eol)) { | |
1942 | peek_bol = peek_eol + 1; | |
1943 | peek_eol = end_of_line(peek_bol, &peek_left); | |
1944 | } | |
1945 | ||
1946 | if (match_funcname(opt, gs, peek_bol, peek_eol)) | |
1947 | show_function = 0; | |
1948 | } | |
ba8ea749 RS |
1949 | if (show_function || |
1950 | (last_hit && lno <= last_hit + opt->post_context)) { | |
83b5d2f5 JH |
1951 | /* If the last hit is within the post context, |
1952 | * we need to show this line. | |
1953 | */ | |
89252cd0 | 1954 | show_line(opt, bol, eol, gs->name, lno, col + 1, '-'); |
83b5d2f5 | 1955 | } |
83b5d2f5 JH |
1956 | |
1957 | next_line: | |
1958 | bol = eol + 1; | |
1959 | if (!left) | |
1960 | break; | |
1961 | left--; | |
1962 | lno++; | |
1963 | } | |
1964 | ||
0ab7befa JH |
1965 | if (collect_hits) |
1966 | return 0; | |
b48fb5b6 | 1967 | |
83b5d2f5 | 1968 | if (opt->status_only) |
e1f68c66 | 1969 | return opt->unmatch_name_only; |
83b5d2f5 JH |
1970 | if (opt->unmatch_name_only) { |
1971 | /* We did not see any hit, so we want to show this */ | |
e1327023 | 1972 | show_name(opt, gs->name); |
83b5d2f5 JH |
1973 | return 1; |
1974 | } | |
1975 | ||
60ecac98 RS |
1976 | xdiff_clear_find_func(&xecfg); |
1977 | opt->priv = NULL; | |
1978 | ||
83b5d2f5 JH |
1979 | /* NEEDSWORK: |
1980 | * The real "grep -c foo *.c" gives many "bar.c:0" lines, | |
1981 | * which feels mostly useless but sometimes useful. Maybe | |
1982 | * make it another option? For now suppress them. | |
1983 | */ | |
5b594f45 FK |
1984 | if (opt->count && count) { |
1985 | char buf[32]; | |
f76d947a RS |
1986 | if (opt->pathname) { |
1987 | output_color(opt, gs->name, strlen(gs->name), | |
fa151dc5 | 1988 | opt->colors[GREP_COLOR_FILENAME]); |
f76d947a RS |
1989 | output_sep(opt, ':'); |
1990 | } | |
1a168e5c | 1991 | xsnprintf(buf, sizeof(buf), "%u\n", count); |
5b594f45 | 1992 | opt->output(opt, buf, strlen(buf)); |
c30c10cf | 1993 | return 1; |
5b594f45 | 1994 | } |
83b5d2f5 JH |
1995 | return !!last_hit; |
1996 | } | |
1997 | ||
0ab7befa JH |
1998 | static void clr_hit_marker(struct grep_expr *x) |
1999 | { | |
2000 | /* All-hit markers are meaningful only at the very top level | |
2001 | * OR node. | |
2002 | */ | |
2003 | while (1) { | |
2004 | x->hit = 0; | |
2005 | if (x->node != GREP_NODE_OR) | |
2006 | return; | |
2007 | x->u.binary.left->hit = 0; | |
2008 | x = x->u.binary.right; | |
2009 | } | |
2010 | } | |
2011 | ||
2012 | static int chk_hit_marker(struct grep_expr *x) | |
2013 | { | |
2014 | /* Top level nodes have hit markers. See if they all are hits */ | |
2015 | while (1) { | |
2016 | if (x->node != GREP_NODE_OR) | |
2017 | return x->hit; | |
2018 | if (!x->u.binary.left->hit) | |
2019 | return 0; | |
2020 | x = x->u.binary.right; | |
2021 | } | |
2022 | } | |
2023 | ||
e1327023 | 2024 | int grep_source(struct grep_opt *opt, struct grep_source *gs) |
0ab7befa JH |
2025 | { |
2026 | /* | |
2027 | * we do not have to do the two-pass grep when we do not check | |
2028 | * buffer-wide "all-match". | |
2029 | */ | |
2030 | if (!opt->all_match) | |
e1327023 | 2031 | return grep_source_1(opt, gs, 0); |
0ab7befa JH |
2032 | |
2033 | /* Otherwise the toplevel "or" terms hit a bit differently. | |
2034 | * We first clear hit markers from them. | |
2035 | */ | |
2036 | clr_hit_marker(opt->pattern_expression); | |
e1327023 | 2037 | grep_source_1(opt, gs, 1); |
0ab7befa JH |
2038 | |
2039 | if (!chk_hit_marker(opt->pattern_expression)) | |
2040 | return 0; | |
2041 | ||
e1327023 JK |
2042 | return grep_source_1(opt, gs, 0); |
2043 | } | |
2044 | ||
c876d6da | 2045 | int grep_buffer(struct grep_opt *opt, char *buf, unsigned long size) |
e1327023 JK |
2046 | { |
2047 | struct grep_source gs; | |
2048 | int r; | |
2049 | ||
55c61688 | 2050 | grep_source_init(&gs, GREP_SOURCE_BUF, NULL, NULL, NULL); |
e1327023 JK |
2051 | gs.buf = buf; |
2052 | gs.size = size; | |
2053 | ||
2054 | r = grep_source(opt, &gs); | |
2055 | ||
2056 | grep_source_clear(&gs); | |
2057 | return r; | |
2058 | } | |
2059 | ||
2060 | void grep_source_init(struct grep_source *gs, enum grep_source_type type, | |
55c61688 NTND |
2061 | const char *name, const char *path, |
2062 | const void *identifier) | |
e1327023 JK |
2063 | { |
2064 | gs->type = type; | |
8c53f071 JK |
2065 | gs->name = xstrdup_or_null(name); |
2066 | gs->path = xstrdup_or_null(path); | |
e1327023 JK |
2067 | gs->buf = NULL; |
2068 | gs->size = 0; | |
94ad9d9e | 2069 | gs->driver = NULL; |
e1327023 JK |
2070 | |
2071 | switch (type) { | |
2072 | case GREP_SOURCE_FILE: | |
2073 | gs->identifier = xstrdup(identifier); | |
2074 | break; | |
1c41c82b BW |
2075 | case GREP_SOURCE_OID: |
2076 | gs->identifier = oiddup(identifier); | |
e1327023 JK |
2077 | break; |
2078 | case GREP_SOURCE_BUF: | |
2079 | gs->identifier = NULL; | |
4538eef5 | 2080 | break; |
e1327023 JK |
2081 | } |
2082 | } | |
2083 | ||
2084 | void grep_source_clear(struct grep_source *gs) | |
2085 | { | |
88ce3ef6 ÆAB |
2086 | FREE_AND_NULL(gs->name); |
2087 | FREE_AND_NULL(gs->path); | |
2088 | FREE_AND_NULL(gs->identifier); | |
e1327023 JK |
2089 | grep_source_clear_data(gs); |
2090 | } | |
2091 | ||
2092 | void grep_source_clear_data(struct grep_source *gs) | |
2093 | { | |
2094 | switch (gs->type) { | |
2095 | case GREP_SOURCE_FILE: | |
1c41c82b | 2096 | case GREP_SOURCE_OID: |
6a83d902 | 2097 | FREE_AND_NULL(gs->buf); |
e1327023 JK |
2098 | gs->size = 0; |
2099 | break; | |
2100 | case GREP_SOURCE_BUF: | |
2101 | /* leave user-provided buf intact */ | |
2102 | break; | |
2103 | } | |
2104 | } | |
2105 | ||
1c41c82b | 2106 | static int grep_source_load_oid(struct grep_source *gs) |
e1327023 JK |
2107 | { |
2108 | enum object_type type; | |
2109 | ||
2110 | grep_read_lock(); | |
b4f5aca4 | 2111 | gs->buf = read_object_file(gs->identifier, &type, &gs->size); |
e1327023 JK |
2112 | grep_read_unlock(); |
2113 | ||
2114 | if (!gs->buf) | |
2115 | return error(_("'%s': unable to read %s"), | |
2116 | gs->name, | |
1c41c82b | 2117 | oid_to_hex(gs->identifier)); |
e1327023 JK |
2118 | return 0; |
2119 | } | |
2120 | ||
2121 | static int grep_source_load_file(struct grep_source *gs) | |
2122 | { | |
2123 | const char *filename = gs->identifier; | |
2124 | struct stat st; | |
2125 | char *data; | |
2126 | size_t size; | |
2127 | int i; | |
2128 | ||
2129 | if (lstat(filename, &st) < 0) { | |
2130 | err_ret: | |
2131 | if (errno != ENOENT) | |
7645d8f1 | 2132 | error_errno(_("failed to stat '%s'"), filename); |
e1327023 JK |
2133 | return -1; |
2134 | } | |
2135 | if (!S_ISREG(st.st_mode)) | |
2136 | return -1; | |
2137 | size = xsize_t(st.st_size); | |
2138 | i = open(filename, O_RDONLY); | |
2139 | if (i < 0) | |
2140 | goto err_ret; | |
3733e694 | 2141 | data = xmallocz(size); |
e1327023 | 2142 | if (st.st_size != read_in_full(i, data, size)) { |
7645d8f1 | 2143 | error_errno(_("'%s': short read"), filename); |
e1327023 JK |
2144 | close(i); |
2145 | free(data); | |
2146 | return -1; | |
2147 | } | |
2148 | close(i); | |
e1327023 JK |
2149 | |
2150 | gs->buf = data; | |
2151 | gs->size = size; | |
2152 | return 0; | |
2153 | } | |
2154 | ||
3083301e | 2155 | static int grep_source_load(struct grep_source *gs) |
e1327023 JK |
2156 | { |
2157 | if (gs->buf) | |
2158 | return 0; | |
2159 | ||
2160 | switch (gs->type) { | |
2161 | case GREP_SOURCE_FILE: | |
2162 | return grep_source_load_file(gs); | |
1c41c82b BW |
2163 | case GREP_SOURCE_OID: |
2164 | return grep_source_load_oid(gs); | |
e1327023 JK |
2165 | case GREP_SOURCE_BUF: |
2166 | return gs->buf ? 0 : -1; | |
2167 | } | |
033abf97 | 2168 | BUG("invalid grep_source type to load"); |
0ab7befa | 2169 | } |
94ad9d9e | 2170 | |
acd00ea0 NTND |
2171 | void grep_source_load_driver(struct grep_source *gs, |
2172 | struct index_state *istate) | |
94ad9d9e JK |
2173 | { |
2174 | if (gs->driver) | |
2175 | return; | |
2176 | ||
2177 | grep_attr_lock(); | |
55c61688 | 2178 | if (gs->path) |
acd00ea0 | 2179 | gs->driver = userdiff_find_by_path(istate, gs->path); |
94ad9d9e JK |
2180 | if (!gs->driver) |
2181 | gs->driver = userdiff_find_by_name("default"); | |
2182 | grep_attr_unlock(); | |
2183 | } | |
41b59bfc | 2184 | |
acd00ea0 NTND |
2185 | static int grep_source_is_binary(struct grep_source *gs, |
2186 | struct index_state *istate) | |
41b59bfc | 2187 | { |
acd00ea0 | 2188 | grep_source_load_driver(gs, istate); |
41b59bfc JK |
2189 | if (gs->driver->binary != -1) |
2190 | return gs->driver->binary; | |
2191 | ||
2192 | if (!grep_source_load(gs)) | |
2193 | return buffer_is_binary(gs->buf, gs->size); | |
2194 | ||
2195 | return 0; | |
2196 | } |