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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; | |
38 | opt->regflags = REG_NEWLINE; | |
39 | opt->max_depth = -1; | |
40 | opt->pattern_type_option = GREP_PATTERN_TYPE_UNSPECIFIED; | |
41 | opt->extended_regexp_option = 0; | |
7ce4fb94 JK |
42 | color_set(opt->color_context, ""); |
43 | color_set(opt->color_filename, ""); | |
44 | color_set(opt->color_function, ""); | |
45 | color_set(opt->color_lineno, ""); | |
46 | color_set(opt->color_match_context, GIT_COLOR_BOLD_RED); | |
47 | color_set(opt->color_match_selected, GIT_COLOR_BOLD_RED); | |
48 | color_set(opt->color_selected, ""); | |
49 | color_set(opt->color_sep, GIT_COLOR_CYAN); | |
7687a054 | 50 | opt->color = -1; |
379642bc | 51 | opt->output = std_output; |
7687a054 JH |
52 | } |
53 | ||
54 | static int parse_pattern_type_arg(const char *opt, const char *arg) | |
55 | { | |
56 | if (!strcmp(arg, "default")) | |
57 | return GREP_PATTERN_TYPE_UNSPECIFIED; | |
58 | else if (!strcmp(arg, "basic")) | |
59 | return GREP_PATTERN_TYPE_BRE; | |
60 | else if (!strcmp(arg, "extended")) | |
61 | return GREP_PATTERN_TYPE_ERE; | |
62 | else if (!strcmp(arg, "fixed")) | |
63 | return GREP_PATTERN_TYPE_FIXED; | |
64 | else if (!strcmp(arg, "perl")) | |
65 | return GREP_PATTERN_TYPE_PCRE; | |
66 | die("bad %s argument: %s", opt, arg); | |
67 | } | |
68 | ||
69 | /* | |
70 | * Read the configuration file once and store it in | |
71 | * the grep_defaults template. | |
72 | */ | |
73 | int grep_config(const char *var, const char *value, void *cb) | |
74 | { | |
75 | struct grep_opt *opt = &grep_defaults; | |
76 | char *color = NULL; | |
77 | ||
78 | if (userdiff_config(var, value) < 0) | |
79 | return -1; | |
80 | ||
81 | if (!strcmp(var, "grep.extendedregexp")) { | |
82 | if (git_config_bool(var, value)) | |
83 | opt->extended_regexp_option = 1; | |
84 | else | |
85 | opt->extended_regexp_option = 0; | |
86 | return 0; | |
87 | } | |
88 | ||
89 | if (!strcmp(var, "grep.patterntype")) { | |
90 | opt->pattern_type_option = parse_pattern_type_arg(var, value); | |
91 | return 0; | |
92 | } | |
93 | ||
94 | if (!strcmp(var, "grep.linenumber")) { | |
95 | opt->linenum = git_config_bool(var, value); | |
96 | return 0; | |
97 | } | |
98 | ||
6453f7b3 AS |
99 | if (!strcmp(var, "grep.fullname")) { |
100 | opt->relative = !git_config_bool(var, value); | |
101 | return 0; | |
102 | } | |
103 | ||
7687a054 JH |
104 | if (!strcmp(var, "color.grep")) |
105 | opt->color = git_config_colorbool(var, value); | |
106 | else if (!strcmp(var, "color.grep.context")) | |
107 | color = opt->color_context; | |
108 | else if (!strcmp(var, "color.grep.filename")) | |
109 | color = opt->color_filename; | |
110 | else if (!strcmp(var, "color.grep.function")) | |
111 | color = opt->color_function; | |
112 | else if (!strcmp(var, "color.grep.linenumber")) | |
113 | color = opt->color_lineno; | |
79a77109 RS |
114 | else if (!strcmp(var, "color.grep.matchcontext")) |
115 | color = opt->color_match_context; | |
116 | else if (!strcmp(var, "color.grep.matchselected")) | |
117 | color = opt->color_match_selected; | |
7687a054 JH |
118 | else if (!strcmp(var, "color.grep.selected")) |
119 | color = opt->color_selected; | |
120 | else if (!strcmp(var, "color.grep.separator")) | |
121 | color = opt->color_sep; | |
79a77109 RS |
122 | else if (!strcmp(var, "color.grep.match")) { |
123 | int rc = 0; | |
124 | if (!value) | |
125 | return config_error_nonbool(var); | |
bf1f639e JH |
126 | rc |= color_parse(value, opt->color_match_context); |
127 | rc |= color_parse(value, opt->color_match_selected); | |
79a77109 RS |
128 | return rc; |
129 | } | |
7687a054 JH |
130 | |
131 | if (color) { | |
132 | if (!value) | |
133 | return config_error_nonbool(var); | |
f6c5a296 | 134 | return color_parse(value, color); |
7687a054 JH |
135 | } |
136 | return 0; | |
137 | } | |
138 | ||
139 | /* | |
140 | * Initialize one instance of grep_opt and copy the | |
141 | * default values from the template we read the configuration | |
142 | * information in an earlier call to git_config(grep_config). | |
143 | */ | |
144 | void grep_init(struct grep_opt *opt, const char *prefix) | |
145 | { | |
146 | struct grep_opt *def = &grep_defaults; | |
147 | ||
148 | memset(opt, 0, sizeof(*opt)); | |
149 | opt->prefix = prefix; | |
150 | opt->prefix_length = (prefix && *prefix) ? strlen(prefix) : 0; | |
151 | opt->pattern_tail = &opt->pattern_list; | |
152 | opt->header_tail = &opt->header_list; | |
153 | ||
154 | opt->color = def->color; | |
155 | opt->extended_regexp_option = def->extended_regexp_option; | |
156 | opt->pattern_type_option = def->pattern_type_option; | |
157 | opt->linenum = def->linenum; | |
158 | opt->max_depth = def->max_depth; | |
159 | opt->pathname = def->pathname; | |
160 | opt->regflags = def->regflags; | |
161 | opt->relative = def->relative; | |
379642bc | 162 | opt->output = def->output; |
7687a054 | 163 | |
7ce4fb94 JK |
164 | color_set(opt->color_context, def->color_context); |
165 | color_set(opt->color_filename, def->color_filename); | |
166 | color_set(opt->color_function, def->color_function); | |
167 | color_set(opt->color_lineno, def->color_lineno); | |
168 | color_set(opt->color_match_context, def->color_match_context); | |
169 | color_set(opt->color_match_selected, def->color_match_selected); | |
170 | color_set(opt->color_selected, def->color_selected); | |
171 | color_set(opt->color_sep, def->color_sep); | |
7687a054 | 172 | } |
07a7d656 | 173 | |
8465541e | 174 | static void grep_set_pattern_type_option(enum grep_pattern_type pattern_type, struct grep_opt *opt) |
c5c31d33 JH |
175 | { |
176 | switch (pattern_type) { | |
177 | case GREP_PATTERN_TYPE_UNSPECIFIED: | |
178 | /* fall through */ | |
179 | ||
180 | case GREP_PATTERN_TYPE_BRE: | |
181 | opt->fixed = 0; | |
6d4b5747 | 182 | opt->pcre1 = 0; |
94da9193 | 183 | opt->pcre2 = 0; |
c5c31d33 JH |
184 | break; |
185 | ||
186 | case GREP_PATTERN_TYPE_ERE: | |
187 | opt->fixed = 0; | |
6d4b5747 | 188 | opt->pcre1 = 0; |
94da9193 | 189 | opt->pcre2 = 0; |
c5c31d33 JH |
190 | opt->regflags |= REG_EXTENDED; |
191 | break; | |
192 | ||
193 | case GREP_PATTERN_TYPE_FIXED: | |
194 | opt->fixed = 1; | |
6d4b5747 | 195 | opt->pcre1 = 0; |
94da9193 | 196 | opt->pcre2 = 0; |
c5c31d33 JH |
197 | break; |
198 | ||
199 | case GREP_PATTERN_TYPE_PCRE: | |
200 | opt->fixed = 0; | |
94da9193 ÆAB |
201 | #ifdef USE_LIBPCRE2 |
202 | opt->pcre1 = 0; | |
203 | opt->pcre2 = 1; | |
204 | #else | |
205 | /* | |
206 | * It's important that pcre1 always be assigned to | |
207 | * even when there's no USE_LIBPCRE* defined. We still | |
208 | * call the PCRE stub function, it just dies with | |
209 | * "cannot use Perl-compatible regexes[...]". | |
210 | */ | |
6d4b5747 | 211 | opt->pcre1 = 1; |
94da9193 ÆAB |
212 | opt->pcre2 = 0; |
213 | #endif | |
c5c31d33 JH |
214 | break; |
215 | } | |
216 | } | |
217 | ||
8465541e JH |
218 | void grep_commit_pattern_type(enum grep_pattern_type pattern_type, struct grep_opt *opt) |
219 | { | |
220 | if (pattern_type != GREP_PATTERN_TYPE_UNSPECIFIED) | |
221 | grep_set_pattern_type_option(pattern_type, opt); | |
222 | else if (opt->pattern_type_option != GREP_PATTERN_TYPE_UNSPECIFIED) | |
223 | grep_set_pattern_type_option(opt->pattern_type_option, opt); | |
224 | else if (opt->extended_regexp_option) | |
225 | grep_set_pattern_type_option(GREP_PATTERN_TYPE_ERE, opt); | |
226 | } | |
227 | ||
fc456751 RS |
228 | static struct grep_pat *create_grep_pat(const char *pat, size_t patlen, |
229 | const char *origin, int no, | |
230 | enum grep_pat_token t, | |
231 | enum grep_header_field field) | |
a4d7d2c6 JH |
232 | { |
233 | struct grep_pat *p = xcalloc(1, sizeof(*p)); | |
526a858a | 234 | p->pattern = xmemdupz(pat, patlen); |
fc456751 RS |
235 | p->patternlen = patlen; |
236 | p->origin = origin; | |
237 | p->no = no; | |
238 | p->token = t; | |
a4d7d2c6 | 239 | p->field = field; |
fc456751 RS |
240 | return p; |
241 | } | |
242 | ||
2b3873ff RS |
243 | static void do_append_grep_pat(struct grep_pat ***tail, struct grep_pat *p) |
244 | { | |
245 | **tail = p; | |
246 | *tail = &p->next; | |
a4d7d2c6 | 247 | p->next = NULL; |
526a858a RS |
248 | |
249 | switch (p->token) { | |
250 | case GREP_PATTERN: /* atom */ | |
251 | case GREP_PATTERN_HEAD: | |
252 | case GREP_PATTERN_BODY: | |
253 | for (;;) { | |
254 | struct grep_pat *new_pat; | |
255 | size_t len = 0; | |
256 | char *cp = p->pattern + p->patternlen, *nl = NULL; | |
257 | while (++len <= p->patternlen) { | |
258 | if (*(--cp) == '\n') { | |
259 | nl = cp; | |
260 | break; | |
261 | } | |
262 | } | |
263 | if (!nl) | |
264 | break; | |
265 | new_pat = create_grep_pat(nl + 1, len - 1, p->origin, | |
266 | p->no, p->token, p->field); | |
267 | new_pat->next = p->next; | |
268 | if (!p->next) | |
269 | *tail = &new_pat->next; | |
270 | p->next = new_pat; | |
271 | *nl = '\0'; | |
272 | p->patternlen -= len; | |
273 | } | |
274 | break; | |
275 | default: | |
276 | break; | |
277 | } | |
2b3873ff RS |
278 | } |
279 | ||
fc456751 RS |
280 | void append_header_grep_pattern(struct grep_opt *opt, |
281 | enum grep_header_field field, const char *pat) | |
282 | { | |
283 | struct grep_pat *p = create_grep_pat(pat, strlen(pat), "header", 0, | |
284 | GREP_PATTERN_HEAD, field); | |
baa6378f JH |
285 | if (field == GREP_HEADER_REFLOG) |
286 | opt->use_reflog_filter = 1; | |
2b3873ff | 287 | do_append_grep_pat(&opt->header_tail, p); |
a4d7d2c6 JH |
288 | } |
289 | ||
83b5d2f5 JH |
290 | void append_grep_pattern(struct grep_opt *opt, const char *pat, |
291 | const char *origin, int no, enum grep_pat_token t) | |
ed40a095 RS |
292 | { |
293 | append_grep_pat(opt, pat, strlen(pat), origin, no, t); | |
294 | } | |
295 | ||
296 | void append_grep_pat(struct grep_opt *opt, const char *pat, size_t patlen, | |
297 | const char *origin, int no, enum grep_pat_token t) | |
83b5d2f5 | 298 | { |
fc456751 | 299 | struct grep_pat *p = create_grep_pat(pat, patlen, origin, no, t, 0); |
2b3873ff | 300 | do_append_grep_pat(&opt->pattern_tail, p); |
83b5d2f5 JH |
301 | } |
302 | ||
5b594f45 FK |
303 | struct grep_opt *grep_opt_dup(const struct grep_opt *opt) |
304 | { | |
305 | struct grep_pat *pat; | |
306 | struct grep_opt *ret = xmalloc(sizeof(struct grep_opt)); | |
307 | *ret = *opt; | |
308 | ||
309 | ret->pattern_list = NULL; | |
310 | ret->pattern_tail = &ret->pattern_list; | |
311 | ||
312 | for(pat = opt->pattern_list; pat != NULL; pat = pat->next) | |
313 | { | |
314 | if(pat->token == GREP_PATTERN_HEAD) | |
315 | append_header_grep_pattern(ret, pat->field, | |
316 | pat->pattern); | |
317 | else | |
ed40a095 RS |
318 | append_grep_pat(ret, pat->pattern, pat->patternlen, |
319 | pat->origin, pat->no, pat->token); | |
5b594f45 FK |
320 | } |
321 | ||
322 | return ret; | |
323 | } | |
324 | ||
a30c148a MK |
325 | static NORETURN void compile_regexp_failed(const struct grep_pat *p, |
326 | const char *error) | |
327 | { | |
328 | char where[1024]; | |
329 | ||
330 | if (p->no) | |
19bdd3e7 | 331 | xsnprintf(where, sizeof(where), "In '%s' at %d, ", p->origin, p->no); |
a30c148a | 332 | else if (p->origin) |
19bdd3e7 | 333 | xsnprintf(where, sizeof(where), "%s, ", p->origin); |
a30c148a MK |
334 | else |
335 | where[0] = 0; | |
336 | ||
337 | die("%s'%s': %s", where, p->pattern, error); | |
338 | } | |
339 | ||
543f1c0c ÆAB |
340 | static int is_fixed(const char *s, size_t len) |
341 | { | |
342 | size_t i; | |
343 | ||
344 | for (i = 0; i < len; i++) { | |
345 | if (is_regex_special(s[i])) | |
346 | return 0; | |
347 | } | |
348 | ||
349 | return 1; | |
350 | } | |
351 | ||
219e65b6 ÆAB |
352 | static int has_null(const char *s, size_t len) |
353 | { | |
354 | /* | |
355 | * regcomp cannot accept patterns with NULs so when using it | |
356 | * we consider any pattern containing a NUL fixed. | |
357 | */ | |
358 | if (memchr(s, 0, len)) | |
359 | return 1; | |
360 | ||
361 | return 0; | |
362 | } | |
363 | ||
3485bea1 | 364 | #ifdef USE_LIBPCRE1 |
6d4b5747 | 365 | static void compile_pcre1_regexp(struct grep_pat *p, const struct grep_opt *opt) |
63e7e9d8 MK |
366 | { |
367 | const char *error; | |
368 | int erroffset; | |
fba4f125 | 369 | int options = PCRE_MULTILINE; |
63e7e9d8 | 370 | |
9d9babb8 NTND |
371 | if (opt->ignore_case) { |
372 | if (has_non_ascii(p->pattern)) | |
6d4b5747 | 373 | p->pcre1_tables = pcre_maketables(); |
63e7e9d8 | 374 | options |= PCRE_CASELESS; |
9d9babb8 | 375 | } |
18547aac NTND |
376 | if (is_utf8_locale() && has_non_ascii(p->pattern)) |
377 | options |= PCRE_UTF8; | |
63e7e9d8 | 378 | |
6d4b5747 ÆAB |
379 | p->pcre1_regexp = pcre_compile(p->pattern, options, &error, &erroffset, |
380 | p->pcre1_tables); | |
381 | if (!p->pcre1_regexp) | |
63e7e9d8 MK |
382 | compile_regexp_failed(p, error); |
383 | ||
fbaceaac | 384 | p->pcre1_extra_info = pcre_study(p->pcre1_regexp, PCRE_STUDY_JIT_COMPILE, &error); |
6d4b5747 | 385 | if (!p->pcre1_extra_info && error) |
63e7e9d8 | 386 | die("%s", error); |
fbaceaac | 387 | |
e87de7ca | 388 | #ifdef GIT_PCRE1_USE_JIT |
fbaceaac ÆAB |
389 | pcre_config(PCRE_CONFIG_JIT, &p->pcre1_jit_on); |
390 | if (p->pcre1_jit_on == 1) { | |
391 | p->pcre1_jit_stack = pcre_jit_stack_alloc(1, 1024 * 1024); | |
392 | if (!p->pcre1_jit_stack) | |
393 | die("Couldn't allocate PCRE JIT stack"); | |
394 | pcre_assign_jit_stack(p->pcre1_extra_info, NULL, p->pcre1_jit_stack); | |
395 | } else if (p->pcre1_jit_on != 0) { | |
396 | die("BUG: The pcre1_jit_on variable should be 0 or 1, not %d", | |
397 | p->pcre1_jit_on); | |
398 | } | |
399 | #endif | |
63e7e9d8 MK |
400 | } |
401 | ||
6d4b5747 | 402 | static int pcre1match(struct grep_pat *p, const char *line, const char *eol, |
63e7e9d8 MK |
403 | regmatch_t *match, int eflags) |
404 | { | |
405 | int ovector[30], ret, flags = 0; | |
406 | ||
407 | if (eflags & REG_NOTBOL) | |
408 | flags |= PCRE_NOTBOL; | |
409 | ||
e87de7ca | 410 | #ifdef GIT_PCRE1_USE_JIT |
fbaceaac ÆAB |
411 | if (p->pcre1_jit_on) { |
412 | ret = pcre_jit_exec(p->pcre1_regexp, p->pcre1_extra_info, line, | |
413 | eol - line, 0, flags, ovector, | |
414 | ARRAY_SIZE(ovector), p->pcre1_jit_stack); | |
415 | } else | |
416 | #endif | |
417 | { | |
418 | ret = pcre_exec(p->pcre1_regexp, p->pcre1_extra_info, line, | |
419 | eol - line, 0, flags, ovector, | |
420 | ARRAY_SIZE(ovector)); | |
421 | } | |
422 | ||
63e7e9d8 MK |
423 | if (ret < 0 && ret != PCRE_ERROR_NOMATCH) |
424 | die("pcre_exec failed with error code %d", ret); | |
425 | if (ret > 0) { | |
426 | ret = 0; | |
427 | match->rm_so = ovector[0]; | |
428 | match->rm_eo = ovector[1]; | |
429 | } | |
430 | ||
431 | return ret; | |
432 | } | |
433 | ||
6d4b5747 | 434 | static void free_pcre1_regexp(struct grep_pat *p) |
63e7e9d8 | 435 | { |
6d4b5747 | 436 | pcre_free(p->pcre1_regexp); |
e87de7ca | 437 | #ifdef GIT_PCRE1_USE_JIT |
fbaceaac ÆAB |
438 | if (p->pcre1_jit_on) { |
439 | pcre_free_study(p->pcre1_extra_info); | |
440 | pcre_jit_stack_free(p->pcre1_jit_stack); | |
441 | } else | |
442 | #endif | |
443 | { | |
444 | pcre_free(p->pcre1_extra_info); | |
445 | } | |
6d4b5747 | 446 | pcre_free((void *)p->pcre1_tables); |
63e7e9d8 | 447 | } |
3485bea1 | 448 | #else /* !USE_LIBPCRE1 */ |
6d4b5747 | 449 | static void compile_pcre1_regexp(struct grep_pat *p, const struct grep_opt *opt) |
63e7e9d8 MK |
450 | { |
451 | die("cannot use Perl-compatible regexes when not compiled with USE_LIBPCRE"); | |
452 | } | |
453 | ||
6d4b5747 | 454 | static int pcre1match(struct grep_pat *p, const char *line, const char *eol, |
63e7e9d8 MK |
455 | regmatch_t *match, int eflags) |
456 | { | |
457 | return 1; | |
458 | } | |
459 | ||
6d4b5747 | 460 | static void free_pcre1_regexp(struct grep_pat *p) |
63e7e9d8 MK |
461 | { |
462 | } | |
3485bea1 | 463 | #endif /* !USE_LIBPCRE1 */ |
63e7e9d8 | 464 | |
94da9193 ÆAB |
465 | #ifdef USE_LIBPCRE2 |
466 | static void compile_pcre2_pattern(struct grep_pat *p, const struct grep_opt *opt) | |
467 | { | |
468 | int error; | |
469 | PCRE2_UCHAR errbuf[256]; | |
470 | PCRE2_SIZE erroffset; | |
471 | int options = PCRE2_MULTILINE; | |
472 | const uint8_t *character_tables = NULL; | |
473 | int jitret; | |
474 | ||
475 | assert(opt->pcre2); | |
476 | ||
477 | p->pcre2_compile_context = NULL; | |
478 | ||
479 | if (opt->ignore_case) { | |
480 | if (has_non_ascii(p->pattern)) { | |
481 | character_tables = pcre2_maketables(NULL); | |
482 | p->pcre2_compile_context = pcre2_compile_context_create(NULL); | |
483 | pcre2_set_character_tables(p->pcre2_compile_context, character_tables); | |
484 | } | |
485 | options |= PCRE2_CASELESS; | |
486 | } | |
487 | if (is_utf8_locale() && has_non_ascii(p->pattern)) | |
488 | options |= PCRE2_UTF; | |
489 | ||
490 | p->pcre2_pattern = pcre2_compile((PCRE2_SPTR)p->pattern, | |
491 | p->patternlen, options, &error, &erroffset, | |
492 | p->pcre2_compile_context); | |
493 | ||
494 | if (p->pcre2_pattern) { | |
495 | p->pcre2_match_data = pcre2_match_data_create_from_pattern(p->pcre2_pattern, NULL); | |
496 | if (!p->pcre2_match_data) | |
497 | die("Couldn't allocate PCRE2 match data"); | |
498 | } else { | |
499 | pcre2_get_error_message(error, errbuf, sizeof(errbuf)); | |
500 | compile_regexp_failed(p, (const char *)&errbuf); | |
501 | } | |
502 | ||
503 | pcre2_config(PCRE2_CONFIG_JIT, &p->pcre2_jit_on); | |
504 | if (p->pcre2_jit_on == 1) { | |
505 | jitret = pcre2_jit_compile(p->pcre2_pattern, PCRE2_JIT_COMPLETE); | |
506 | if (jitret) | |
507 | die("Couldn't JIT the PCRE2 pattern '%s', got '%d'\n", p->pattern, jitret); | |
508 | p->pcre2_jit_stack = pcre2_jit_stack_create(1, 1024 * 1024, NULL); | |
509 | if (!p->pcre2_jit_stack) | |
510 | die("Couldn't allocate PCRE2 JIT stack"); | |
511 | p->pcre2_match_context = pcre2_match_context_create(NULL); | |
674ad936 | 512 | if (!p->pcre2_match_context) |
94da9193 ÆAB |
513 | die("Couldn't allocate PCRE2 match context"); |
514 | pcre2_jit_stack_assign(p->pcre2_match_context, NULL, p->pcre2_jit_stack); | |
515 | } else if (p->pcre2_jit_on != 0) { | |
516 | die("BUG: The pcre2_jit_on variable should be 0 or 1, not %d", | |
517 | p->pcre1_jit_on); | |
518 | } | |
519 | } | |
520 | ||
521 | static int pcre2match(struct grep_pat *p, const char *line, const char *eol, | |
522 | regmatch_t *match, int eflags) | |
523 | { | |
524 | int ret, flags = 0; | |
525 | PCRE2_SIZE *ovector; | |
526 | PCRE2_UCHAR errbuf[256]; | |
527 | ||
528 | if (eflags & REG_NOTBOL) | |
529 | flags |= PCRE2_NOTBOL; | |
530 | ||
531 | if (p->pcre2_jit_on) | |
532 | ret = pcre2_jit_match(p->pcre2_pattern, (unsigned char *)line, | |
533 | eol - line, 0, flags, p->pcre2_match_data, | |
534 | NULL); | |
535 | else | |
536 | ret = pcre2_match(p->pcre2_pattern, (unsigned char *)line, | |
537 | eol - line, 0, flags, p->pcre2_match_data, | |
538 | NULL); | |
539 | ||
540 | if (ret < 0 && ret != PCRE2_ERROR_NOMATCH) { | |
541 | pcre2_get_error_message(ret, errbuf, sizeof(errbuf)); | |
542 | die("%s failed with error code %d: %s", | |
543 | (p->pcre2_jit_on ? "pcre2_jit_match" : "pcre2_match"), ret, | |
544 | errbuf); | |
545 | } | |
546 | if (ret > 0) { | |
547 | ovector = pcre2_get_ovector_pointer(p->pcre2_match_data); | |
548 | ret = 0; | |
549 | match->rm_so = (int)ovector[0]; | |
550 | match->rm_eo = (int)ovector[1]; | |
551 | } | |
552 | ||
553 | return ret; | |
554 | } | |
555 | ||
556 | static void free_pcre2_pattern(struct grep_pat *p) | |
557 | { | |
558 | pcre2_compile_context_free(p->pcre2_compile_context); | |
559 | pcre2_code_free(p->pcre2_pattern); | |
560 | pcre2_match_data_free(p->pcre2_match_data); | |
561 | pcre2_jit_stack_free(p->pcre2_jit_stack); | |
562 | pcre2_match_context_free(p->pcre2_match_context); | |
563 | } | |
564 | #else /* !USE_LIBPCRE2 */ | |
565 | static void compile_pcre2_pattern(struct grep_pat *p, const struct grep_opt *opt) | |
566 | { | |
567 | /* | |
568 | * Unreachable until USE_LIBPCRE2 becomes synonymous with | |
569 | * USE_LIBPCRE. See the sibling comment in | |
570 | * grep_set_pattern_type_option(). | |
571 | */ | |
572 | die("cannot use Perl-compatible regexes when not compiled with USE_LIBPCRE"); | |
573 | } | |
574 | ||
575 | static int pcre2match(struct grep_pat *p, const char *line, const char *eol, | |
576 | regmatch_t *match, int eflags) | |
577 | { | |
578 | return 1; | |
579 | } | |
580 | ||
581 | static void free_pcre2_pattern(struct grep_pat *p) | |
582 | { | |
583 | } | |
584 | #endif /* !USE_LIBPCRE2 */ | |
585 | ||
793dc676 NTND |
586 | static void compile_fixed_regexp(struct grep_pat *p, struct grep_opt *opt) |
587 | { | |
588 | struct strbuf sb = STRBUF_INIT; | |
589 | int err; | |
e0b9f8ae | 590 | int regflags = opt->regflags; |
793dc676 NTND |
591 | |
592 | basic_regex_quote_buf(&sb, p->pattern); | |
793dc676 NTND |
593 | if (opt->ignore_case) |
594 | regflags |= REG_ICASE; | |
595 | err = regcomp(&p->regexp, sb.buf, regflags); | |
596 | if (opt->debug) | |
597 | fprintf(stderr, "fixed %s\n", sb.buf); | |
598 | strbuf_release(&sb); | |
599 | if (err) { | |
600 | char errbuf[1024]; | |
601 | regerror(err, &p->regexp, errbuf, sizeof(errbuf)); | |
602 | regfree(&p->regexp); | |
603 | compile_regexp_failed(p, errbuf); | |
604 | } | |
605 | } | |
606 | ||
83b5d2f5 JH |
607 | static void compile_regexp(struct grep_pat *p, struct grep_opt *opt) |
608 | { | |
5c1ebcca | 609 | int icase, ascii_only; |
c822255c RS |
610 | int err; |
611 | ||
d7eb527d | 612 | p->word_regexp = opt->word_regexp; |
5183bf67 | 613 | p->ignore_case = opt->ignore_case; |
5c1ebcca NTND |
614 | icase = opt->regflags & REG_ICASE || p->ignore_case; |
615 | ascii_only = !has_non_ascii(p->pattern); | |
d7eb527d | 616 | |
793dc676 NTND |
617 | /* |
618 | * Even when -F (fixed) asks us to do a non-regexp search, we | |
619 | * may not be able to correctly case-fold when -i | |
620 | * (ignore-case) is asked (in which case, we'll synthesize a | |
621 | * regexp to match the pattern that matches regexp special | |
622 | * characters literally, while ignoring case differences). On | |
623 | * the other hand, even without -F, if the pattern does not | |
624 | * have any regexp special characters and there is no need for | |
625 | * case-folding search, we can internally turn it into a | |
626 | * simple string match using kws. p->fixed tells us if we | |
627 | * want to use kws. | |
628 | */ | |
219e65b6 ÆAB |
629 | if (opt->fixed || |
630 | has_null(p->pattern, p->patternlen) || | |
631 | is_fixed(p->pattern, p->patternlen)) | |
793dc676 | 632 | p->fixed = !icase || ascii_only; |
9eceddee FK |
633 | else |
634 | p->fixed = 0; | |
635 | ||
636 | if (p->fixed) { | |
695f95ba | 637 | p->kws = kwsalloc(icase ? tolower_trans_tbl : NULL); |
9eceddee FK |
638 | kwsincr(p->kws, p->pattern, p->patternlen); |
639 | kwsprep(p->kws); | |
c822255c | 640 | return; |
793dc676 NTND |
641 | } else if (opt->fixed) { |
642 | /* | |
643 | * We come here when the pattern has the non-ascii | |
644 | * characters we cannot case-fold, and asked to | |
645 | * ignore-case. | |
646 | */ | |
647 | compile_fixed_regexp(p, opt); | |
648 | return; | |
9eceddee | 649 | } |
c822255c | 650 | |
94da9193 ÆAB |
651 | if (opt->pcre2) { |
652 | compile_pcre2_pattern(p, opt); | |
653 | return; | |
654 | } | |
655 | ||
6d4b5747 ÆAB |
656 | if (opt->pcre1) { |
657 | compile_pcre1_regexp(p, opt); | |
63e7e9d8 MK |
658 | return; |
659 | } | |
660 | ||
c822255c | 661 | err = regcomp(&p->regexp, p->pattern, opt->regflags); |
83b5d2f5 JH |
662 | if (err) { |
663 | char errbuf[1024]; | |
83b5d2f5 JH |
664 | regerror(err, &p->regexp, errbuf, 1024); |
665 | regfree(&p->regexp); | |
a30c148a | 666 | compile_regexp_failed(p, errbuf); |
83b5d2f5 JH |
667 | } |
668 | } | |
669 | ||
0ab7befa | 670 | static struct grep_expr *compile_pattern_or(struct grep_pat **); |
83b5d2f5 JH |
671 | static struct grep_expr *compile_pattern_atom(struct grep_pat **list) |
672 | { | |
673 | struct grep_pat *p; | |
674 | struct grep_expr *x; | |
675 | ||
676 | p = *list; | |
c922b01f LT |
677 | if (!p) |
678 | return NULL; | |
83b5d2f5 JH |
679 | switch (p->token) { |
680 | case GREP_PATTERN: /* atom */ | |
480c1ca6 JH |
681 | case GREP_PATTERN_HEAD: |
682 | case GREP_PATTERN_BODY: | |
83b5d2f5 JH |
683 | x = xcalloc(1, sizeof (struct grep_expr)); |
684 | x->node = GREP_NODE_ATOM; | |
685 | x->u.atom = p; | |
686 | *list = p->next; | |
687 | return x; | |
688 | case GREP_OPEN_PAREN: | |
689 | *list = p->next; | |
0ab7befa | 690 | x = compile_pattern_or(list); |
83b5d2f5 JH |
691 | if (!*list || (*list)->token != GREP_CLOSE_PAREN) |
692 | die("unmatched parenthesis"); | |
693 | *list = (*list)->next; | |
694 | return x; | |
695 | default: | |
696 | return NULL; | |
697 | } | |
698 | } | |
699 | ||
700 | static struct grep_expr *compile_pattern_not(struct grep_pat **list) | |
701 | { | |
702 | struct grep_pat *p; | |
703 | struct grep_expr *x; | |
704 | ||
705 | p = *list; | |
c922b01f LT |
706 | if (!p) |
707 | return NULL; | |
83b5d2f5 JH |
708 | switch (p->token) { |
709 | case GREP_NOT: | |
710 | if (!p->next) | |
711 | die("--not not followed by pattern expression"); | |
712 | *list = p->next; | |
713 | x = xcalloc(1, sizeof (struct grep_expr)); | |
714 | x->node = GREP_NODE_NOT; | |
715 | x->u.unary = compile_pattern_not(list); | |
716 | if (!x->u.unary) | |
717 | die("--not followed by non pattern expression"); | |
718 | return x; | |
719 | default: | |
720 | return compile_pattern_atom(list); | |
721 | } | |
722 | } | |
723 | ||
724 | static struct grep_expr *compile_pattern_and(struct grep_pat **list) | |
725 | { | |
726 | struct grep_pat *p; | |
727 | struct grep_expr *x, *y, *z; | |
728 | ||
729 | x = compile_pattern_not(list); | |
730 | p = *list; | |
731 | if (p && p->token == GREP_AND) { | |
732 | if (!p->next) | |
733 | die("--and not followed by pattern expression"); | |
734 | *list = p->next; | |
735 | y = compile_pattern_and(list); | |
736 | if (!y) | |
737 | die("--and not followed by pattern expression"); | |
738 | z = xcalloc(1, sizeof (struct grep_expr)); | |
739 | z->node = GREP_NODE_AND; | |
740 | z->u.binary.left = x; | |
741 | z->u.binary.right = y; | |
742 | return z; | |
743 | } | |
744 | return x; | |
745 | } | |
746 | ||
747 | static struct grep_expr *compile_pattern_or(struct grep_pat **list) | |
748 | { | |
749 | struct grep_pat *p; | |
750 | struct grep_expr *x, *y, *z; | |
751 | ||
752 | x = compile_pattern_and(list); | |
753 | p = *list; | |
754 | if (x && p && p->token != GREP_CLOSE_PAREN) { | |
755 | y = compile_pattern_or(list); | |
756 | if (!y) | |
757 | die("not a pattern expression %s", p->pattern); | |
758 | z = xcalloc(1, sizeof (struct grep_expr)); | |
759 | z->node = GREP_NODE_OR; | |
760 | z->u.binary.left = x; | |
761 | z->u.binary.right = y; | |
762 | return z; | |
763 | } | |
764 | return x; | |
765 | } | |
766 | ||
767 | static struct grep_expr *compile_pattern_expr(struct grep_pat **list) | |
768 | { | |
769 | return compile_pattern_or(list); | |
770 | } | |
771 | ||
17bf35a3 JH |
772 | static void indent(int in) |
773 | { | |
774 | while (in-- > 0) | |
775 | fputc(' ', stderr); | |
776 | } | |
777 | ||
778 | static void dump_grep_pat(struct grep_pat *p) | |
779 | { | |
780 | switch (p->token) { | |
781 | case GREP_AND: fprintf(stderr, "*and*"); break; | |
782 | case GREP_OPEN_PAREN: fprintf(stderr, "*(*"); break; | |
783 | case GREP_CLOSE_PAREN: fprintf(stderr, "*)*"); break; | |
784 | case GREP_NOT: fprintf(stderr, "*not*"); break; | |
785 | case GREP_OR: fprintf(stderr, "*or*"); break; | |
786 | ||
787 | case GREP_PATTERN: fprintf(stderr, "pattern"); break; | |
788 | case GREP_PATTERN_HEAD: fprintf(stderr, "pattern_head"); break; | |
789 | case GREP_PATTERN_BODY: fprintf(stderr, "pattern_body"); break; | |
790 | } | |
791 | ||
792 | switch (p->token) { | |
793 | default: break; | |
794 | case GREP_PATTERN_HEAD: | |
795 | fprintf(stderr, "<head %d>", p->field); break; | |
796 | case GREP_PATTERN_BODY: | |
797 | fprintf(stderr, "<body>"); break; | |
798 | } | |
799 | switch (p->token) { | |
800 | default: break; | |
801 | case GREP_PATTERN_HEAD: | |
802 | case GREP_PATTERN_BODY: | |
803 | case GREP_PATTERN: | |
804 | fprintf(stderr, "%.*s", (int)p->patternlen, p->pattern); | |
805 | break; | |
806 | } | |
807 | fputc('\n', stderr); | |
808 | } | |
809 | ||
810 | static void dump_grep_expression_1(struct grep_expr *x, int in) | |
811 | { | |
812 | indent(in); | |
813 | switch (x->node) { | |
814 | case GREP_NODE_TRUE: | |
815 | fprintf(stderr, "true\n"); | |
816 | break; | |
817 | case GREP_NODE_ATOM: | |
818 | dump_grep_pat(x->u.atom); | |
819 | break; | |
820 | case GREP_NODE_NOT: | |
821 | fprintf(stderr, "(not\n"); | |
822 | dump_grep_expression_1(x->u.unary, in+1); | |
823 | indent(in); | |
824 | fprintf(stderr, ")\n"); | |
825 | break; | |
826 | case GREP_NODE_AND: | |
827 | fprintf(stderr, "(and\n"); | |
828 | dump_grep_expression_1(x->u.binary.left, in+1); | |
829 | dump_grep_expression_1(x->u.binary.right, in+1); | |
830 | indent(in); | |
831 | fprintf(stderr, ")\n"); | |
832 | break; | |
833 | case GREP_NODE_OR: | |
834 | fprintf(stderr, "(or\n"); | |
835 | dump_grep_expression_1(x->u.binary.left, in+1); | |
836 | dump_grep_expression_1(x->u.binary.right, in+1); | |
837 | indent(in); | |
838 | fprintf(stderr, ")\n"); | |
839 | break; | |
840 | } | |
841 | } | |
842 | ||
07a7d656 | 843 | static void dump_grep_expression(struct grep_opt *opt) |
17bf35a3 JH |
844 | { |
845 | struct grep_expr *x = opt->pattern_expression; | |
846 | ||
847 | if (opt->all_match) | |
848 | fprintf(stderr, "[all-match]\n"); | |
849 | dump_grep_expression_1(x, 0); | |
850 | fflush(NULL); | |
851 | } | |
852 | ||
5aaeb733 JH |
853 | static struct grep_expr *grep_true_expr(void) |
854 | { | |
855 | struct grep_expr *z = xcalloc(1, sizeof(*z)); | |
856 | z->node = GREP_NODE_TRUE; | |
857 | return z; | |
858 | } | |
859 | ||
860 | static struct grep_expr *grep_or_expr(struct grep_expr *left, struct grep_expr *right) | |
861 | { | |
862 | struct grep_expr *z = xcalloc(1, sizeof(*z)); | |
863 | z->node = GREP_NODE_OR; | |
864 | z->u.binary.left = left; | |
865 | z->u.binary.right = right; | |
866 | return z; | |
867 | } | |
868 | ||
95ce9ce2 | 869 | static struct grep_expr *prep_header_patterns(struct grep_opt *opt) |
83b5d2f5 JH |
870 | { |
871 | struct grep_pat *p; | |
95ce9ce2 | 872 | struct grep_expr *header_expr; |
5aaeb733 JH |
873 | struct grep_expr *(header_group[GREP_HEADER_FIELD_MAX]); |
874 | enum grep_header_field fld; | |
83b5d2f5 | 875 | |
95ce9ce2 JH |
876 | if (!opt->header_list) |
877 | return NULL; | |
2385f246 | 878 | |
95ce9ce2 JH |
879 | for (p = opt->header_list; p; p = p->next) { |
880 | if (p->token != GREP_PATTERN_HEAD) | |
ef1177d1 | 881 | die("BUG: a non-header pattern in grep header list."); |
3ce3ffb8 AP |
882 | if (p->field < GREP_HEADER_FIELD_MIN || |
883 | GREP_HEADER_FIELD_MAX <= p->field) | |
ef1177d1 | 884 | die("BUG: unknown header field %d", p->field); |
95ce9ce2 | 885 | compile_regexp(p, opt); |
80235ba7 | 886 | } |
5aaeb733 JH |
887 | |
888 | for (fld = 0; fld < GREP_HEADER_FIELD_MAX; fld++) | |
889 | header_group[fld] = NULL; | |
890 | ||
891 | for (p = opt->header_list; p; p = p->next) { | |
892 | struct grep_expr *h; | |
893 | struct grep_pat *pp = p; | |
894 | ||
895 | h = compile_pattern_atom(&pp); | |
896 | if (!h || pp != p->next) | |
ef1177d1 | 897 | die("BUG: malformed header expr"); |
5aaeb733 JH |
898 | if (!header_group[p->field]) { |
899 | header_group[p->field] = h; | |
900 | continue; | |
901 | } | |
902 | header_group[p->field] = grep_or_expr(h, header_group[p->field]); | |
903 | } | |
904 | ||
905 | header_expr = NULL; | |
906 | ||
907 | for (fld = 0; fld < GREP_HEADER_FIELD_MAX; fld++) { | |
908 | if (!header_group[fld]) | |
909 | continue; | |
910 | if (!header_expr) | |
911 | header_expr = grep_true_expr(); | |
912 | header_expr = grep_or_expr(header_group[fld], header_expr); | |
913 | } | |
95ce9ce2 JH |
914 | return header_expr; |
915 | } | |
916 | ||
13e4fc7e JH |
917 | static struct grep_expr *grep_splice_or(struct grep_expr *x, struct grep_expr *y) |
918 | { | |
919 | struct grep_expr *z = x; | |
920 | ||
921 | while (x) { | |
922 | assert(x->node == GREP_NODE_OR); | |
923 | if (x->u.binary.right && | |
924 | x->u.binary.right->node == GREP_NODE_TRUE) { | |
925 | x->u.binary.right = y; | |
926 | break; | |
927 | } | |
928 | x = x->u.binary.right; | |
929 | } | |
930 | return z; | |
931 | } | |
932 | ||
17bf35a3 | 933 | static void compile_grep_patterns_real(struct grep_opt *opt) |
95ce9ce2 JH |
934 | { |
935 | struct grep_pat *p; | |
936 | struct grep_expr *header_expr = prep_header_patterns(opt); | |
0ab7befa | 937 | |
83b5d2f5 | 938 | for (p = opt->pattern_list; p; p = p->next) { |
480c1ca6 JH |
939 | switch (p->token) { |
940 | case GREP_PATTERN: /* atom */ | |
941 | case GREP_PATTERN_HEAD: | |
942 | case GREP_PATTERN_BODY: | |
c822255c | 943 | compile_regexp(p, opt); |
480c1ca6 JH |
944 | break; |
945 | default: | |
83b5d2f5 | 946 | opt->extended = 1; |
480c1ca6 JH |
947 | break; |
948 | } | |
83b5d2f5 JH |
949 | } |
950 | ||
80235ba7 JH |
951 | if (opt->all_match || header_expr) |
952 | opt->extended = 1; | |
17bf35a3 | 953 | else if (!opt->extended && !opt->debug) |
83b5d2f5 JH |
954 | return; |
955 | ||
83b5d2f5 | 956 | p = opt->pattern_list; |
ba150a3f MB |
957 | if (p) |
958 | opt->pattern_expression = compile_pattern_expr(&p); | |
83b5d2f5 JH |
959 | if (p) |
960 | die("incomplete pattern expression: %s", p->pattern); | |
80235ba7 JH |
961 | |
962 | if (!header_expr) | |
963 | return; | |
964 | ||
5aaeb733 | 965 | if (!opt->pattern_expression) |
80235ba7 | 966 | opt->pattern_expression = header_expr; |
13e4fc7e JH |
967 | else if (opt->all_match) |
968 | opt->pattern_expression = grep_splice_or(header_expr, | |
969 | opt->pattern_expression); | |
5aaeb733 JH |
970 | else |
971 | opt->pattern_expression = grep_or_expr(opt->pattern_expression, | |
972 | header_expr); | |
80235ba7 | 973 | opt->all_match = 1; |
83b5d2f5 JH |
974 | } |
975 | ||
17bf35a3 JH |
976 | void compile_grep_patterns(struct grep_opt *opt) |
977 | { | |
978 | compile_grep_patterns_real(opt); | |
979 | if (opt->debug) | |
980 | dump_grep_expression(opt); | |
981 | } | |
982 | ||
b48fb5b6 JH |
983 | static void free_pattern_expr(struct grep_expr *x) |
984 | { | |
985 | switch (x->node) { | |
5aaeb733 | 986 | case GREP_NODE_TRUE: |
b48fb5b6 JH |
987 | case GREP_NODE_ATOM: |
988 | break; | |
989 | case GREP_NODE_NOT: | |
990 | free_pattern_expr(x->u.unary); | |
991 | break; | |
992 | case GREP_NODE_AND: | |
993 | case GREP_NODE_OR: | |
994 | free_pattern_expr(x->u.binary.left); | |
995 | free_pattern_expr(x->u.binary.right); | |
996 | break; | |
997 | } | |
998 | free(x); | |
999 | } | |
1000 | ||
1001 | void free_grep_patterns(struct grep_opt *opt) | |
1002 | { | |
1003 | struct grep_pat *p, *n; | |
1004 | ||
1005 | for (p = opt->pattern_list; p; p = n) { | |
1006 | n = p->next; | |
1007 | switch (p->token) { | |
1008 | case GREP_PATTERN: /* atom */ | |
1009 | case GREP_PATTERN_HEAD: | |
1010 | case GREP_PATTERN_BODY: | |
9eceddee FK |
1011 | if (p->kws) |
1012 | kwsfree(p->kws); | |
6d4b5747 ÆAB |
1013 | else if (p->pcre1_regexp) |
1014 | free_pcre1_regexp(p); | |
94da9193 ÆAB |
1015 | else if (p->pcre2_pattern) |
1016 | free_pcre2_pattern(p); | |
63e7e9d8 MK |
1017 | else |
1018 | regfree(&p->regexp); | |
526a858a | 1019 | free(p->pattern); |
b48fb5b6 JH |
1020 | break; |
1021 | default: | |
1022 | break; | |
1023 | } | |
1024 | free(p); | |
1025 | } | |
1026 | ||
1027 | if (!opt->extended) | |
1028 | return; | |
1029 | free_pattern_expr(opt->pattern_expression); | |
1030 | } | |
1031 | ||
83b5d2f5 JH |
1032 | static char *end_of_line(char *cp, unsigned long *left) |
1033 | { | |
1034 | unsigned long l = *left; | |
1035 | while (l && *cp != '\n') { | |
1036 | l--; | |
1037 | cp++; | |
1038 | } | |
1039 | *left = l; | |
1040 | return cp; | |
1041 | } | |
1042 | ||
1043 | static int word_char(char ch) | |
1044 | { | |
1045 | return isalnum(ch) || ch == '_'; | |
1046 | } | |
1047 | ||
55f638bd ML |
1048 | static void output_color(struct grep_opt *opt, const void *data, size_t size, |
1049 | const char *color) | |
1050 | { | |
daa0c3d9 | 1051 | if (want_color(opt->color) && color && color[0]) { |
55f638bd ML |
1052 | opt->output(opt, color, strlen(color)); |
1053 | opt->output(opt, data, size); | |
1054 | opt->output(opt, GIT_COLOR_RESET, strlen(GIT_COLOR_RESET)); | |
1055 | } else | |
1056 | opt->output(opt, data, size); | |
1057 | } | |
1058 | ||
1059 | static void output_sep(struct grep_opt *opt, char sign) | |
1060 | { | |
1061 | if (opt->null_following_name) | |
1062 | opt->output(opt, "\0", 1); | |
1063 | else | |
1064 | output_color(opt, &sign, 1, opt->color_sep); | |
1065 | } | |
1066 | ||
83caecca RZ |
1067 | static void show_name(struct grep_opt *opt, const char *name) |
1068 | { | |
55f638bd | 1069 | output_color(opt, name, strlen(name), opt->color_filename); |
5b594f45 | 1070 | opt->output(opt, opt->null_following_name ? "\0" : "\n", 1); |
83caecca RZ |
1071 | } |
1072 | ||
ed40a095 RS |
1073 | static int fixmatch(struct grep_pat *p, char *line, char *eol, |
1074 | regmatch_t *match) | |
83b5d2f5 | 1075 | { |
9eceddee FK |
1076 | struct kwsmatch kwsm; |
1077 | size_t offset = kwsexec(p->kws, line, eol - line, &kwsm); | |
1078 | if (offset == -1) { | |
83b5d2f5 JH |
1079 | match->rm_so = match->rm_eo = -1; |
1080 | return REG_NOMATCH; | |
9eceddee FK |
1081 | } else { |
1082 | match->rm_so = offset; | |
1083 | match->rm_eo = match->rm_so + kwsm.size[0]; | |
83b5d2f5 JH |
1084 | return 0; |
1085 | } | |
1086 | } | |
1087 | ||
97e77784 MK |
1088 | static int patmatch(struct grep_pat *p, char *line, char *eol, |
1089 | regmatch_t *match, int eflags) | |
1090 | { | |
1091 | int hit; | |
1092 | ||
1093 | if (p->fixed) | |
1094 | hit = !fixmatch(p, line, eol, match); | |
6d4b5747 ÆAB |
1095 | else if (p->pcre1_regexp) |
1096 | hit = !pcre1match(p, line, eol, match, eflags); | |
94da9193 ÆAB |
1097 | else if (p->pcre2_pattern) |
1098 | hit = !pcre2match(p, line, eol, match, eflags); | |
97e77784 | 1099 | else |
b7d36ffc JS |
1100 | hit = !regexec_buf(&p->regexp, line, eol - line, 1, match, |
1101 | eflags); | |
97e77784 MK |
1102 | |
1103 | return hit; | |
1104 | } | |
1105 | ||
a4d7d2c6 JH |
1106 | static int strip_timestamp(char *bol, char **eol_p) |
1107 | { | |
1108 | char *eol = *eol_p; | |
1109 | int ch; | |
1110 | ||
1111 | while (bol < --eol) { | |
1112 | if (*eol != '>') | |
1113 | continue; | |
1114 | *eol_p = ++eol; | |
1115 | ch = *eol; | |
1116 | *eol = '\0'; | |
1117 | return ch; | |
1118 | } | |
1119 | return 0; | |
1120 | } | |
1121 | ||
1122 | static struct { | |
1123 | const char *field; | |
1124 | size_t len; | |
1125 | } header_field[] = { | |
1126 | { "author ", 7 }, | |
1127 | { "committer ", 10 }, | |
72fd13f7 | 1128 | { "reflog ", 7 }, |
a4d7d2c6 JH |
1129 | }; |
1130 | ||
d7eb527d | 1131 | static int match_one_pattern(struct grep_pat *p, char *bol, char *eol, |
79212772 RS |
1132 | enum grep_context ctx, |
1133 | regmatch_t *pmatch, int eflags) | |
83b5d2f5 JH |
1134 | { |
1135 | int hit = 0; | |
a4d7d2c6 | 1136 | int saved_ch = 0; |
e701fadb | 1137 | const char *start = bol; |
83b5d2f5 | 1138 | |
480c1ca6 JH |
1139 | if ((p->token != GREP_PATTERN) && |
1140 | ((p->token == GREP_PATTERN_HEAD) != (ctx == GREP_CONTEXT_HEAD))) | |
1141 | return 0; | |
1142 | ||
a4d7d2c6 JH |
1143 | if (p->token == GREP_PATTERN_HEAD) { |
1144 | const char *field; | |
1145 | size_t len; | |
1146 | assert(p->field < ARRAY_SIZE(header_field)); | |
1147 | field = header_field[p->field].field; | |
1148 | len = header_field[p->field].len; | |
1149 | if (strncmp(bol, field, len)) | |
1150 | return 0; | |
1151 | bol += len; | |
ad4813b3 NTND |
1152 | switch (p->field) { |
1153 | case GREP_HEADER_AUTHOR: | |
1154 | case GREP_HEADER_COMMITTER: | |
1155 | saved_ch = strip_timestamp(bol, &eol); | |
1156 | break; | |
1157 | default: | |
1158 | break; | |
1159 | } | |
a4d7d2c6 JH |
1160 | } |
1161 | ||
83b5d2f5 | 1162 | again: |
97e77784 | 1163 | hit = patmatch(p, bol, eol, pmatch, eflags); |
83b5d2f5 | 1164 | |
d7eb527d | 1165 | if (hit && p->word_regexp) { |
83b5d2f5 | 1166 | if ((pmatch[0].rm_so < 0) || |
84201eae | 1167 | (eol - bol) < pmatch[0].rm_so || |
83b5d2f5 JH |
1168 | (pmatch[0].rm_eo < 0) || |
1169 | (eol - bol) < pmatch[0].rm_eo) | |
1170 | die("regexp returned nonsense"); | |
1171 | ||
1172 | /* Match beginning must be either beginning of the | |
1173 | * line, or at word boundary (i.e. the last char must | |
1174 | * not be a word char). Similarly, match end must be | |
1175 | * either end of the line, or at word boundary | |
1176 | * (i.e. the next char must not be a word char). | |
1177 | */ | |
fb62eb7f | 1178 | if ( ((pmatch[0].rm_so == 0) || |
83b5d2f5 JH |
1179 | !word_char(bol[pmatch[0].rm_so-1])) && |
1180 | ((pmatch[0].rm_eo == (eol-bol)) || | |
1181 | !word_char(bol[pmatch[0].rm_eo])) ) | |
1182 | ; | |
1183 | else | |
1184 | hit = 0; | |
1185 | ||
84201eae RS |
1186 | /* Words consist of at least one character. */ |
1187 | if (pmatch->rm_so == pmatch->rm_eo) | |
1188 | hit = 0; | |
1189 | ||
83b5d2f5 JH |
1190 | if (!hit && pmatch[0].rm_so + bol + 1 < eol) { |
1191 | /* There could be more than one match on the | |
1192 | * line, and the first match might not be | |
1193 | * strict word match. But later ones could be! | |
fb62eb7f RS |
1194 | * Forward to the next possible start, i.e. the |
1195 | * next position following a non-word char. | |
83b5d2f5 JH |
1196 | */ |
1197 | bol = pmatch[0].rm_so + bol + 1; | |
fb62eb7f RS |
1198 | while (word_char(bol[-1]) && bol < eol) |
1199 | bol++; | |
dbb6a4ad | 1200 | eflags |= REG_NOTBOL; |
fb62eb7f RS |
1201 | if (bol < eol) |
1202 | goto again; | |
83b5d2f5 JH |
1203 | } |
1204 | } | |
a4d7d2c6 JH |
1205 | if (p->token == GREP_PATTERN_HEAD && saved_ch) |
1206 | *eol = saved_ch; | |
e701fadb RS |
1207 | if (hit) { |
1208 | pmatch[0].rm_so += bol - start; | |
1209 | pmatch[0].rm_eo += bol - start; | |
1210 | } | |
83b5d2f5 JH |
1211 | return hit; |
1212 | } | |
1213 | ||
d7eb527d RS |
1214 | static int match_expr_eval(struct grep_expr *x, char *bol, char *eol, |
1215 | enum grep_context ctx, int collect_hits) | |
83b5d2f5 | 1216 | { |
0ab7befa | 1217 | int h = 0; |
79212772 | 1218 | regmatch_t match; |
0ab7befa | 1219 | |
c922b01f LT |
1220 | if (!x) |
1221 | die("Not a valid grep expression"); | |
83b5d2f5 | 1222 | switch (x->node) { |
5aaeb733 JH |
1223 | case GREP_NODE_TRUE: |
1224 | h = 1; | |
1225 | break; | |
83b5d2f5 | 1226 | case GREP_NODE_ATOM: |
79212772 | 1227 | h = match_one_pattern(x->u.atom, bol, eol, ctx, &match, 0); |
83b5d2f5 JH |
1228 | break; |
1229 | case GREP_NODE_NOT: | |
d7eb527d | 1230 | h = !match_expr_eval(x->u.unary, bol, eol, ctx, 0); |
0ab7befa | 1231 | break; |
83b5d2f5 | 1232 | case GREP_NODE_AND: |
d7eb527d | 1233 | if (!match_expr_eval(x->u.binary.left, bol, eol, ctx, 0)) |
252d560d | 1234 | return 0; |
d7eb527d | 1235 | h = match_expr_eval(x->u.binary.right, bol, eol, ctx, 0); |
0ab7befa | 1236 | break; |
83b5d2f5 | 1237 | case GREP_NODE_OR: |
0ab7befa | 1238 | if (!collect_hits) |
d7eb527d | 1239 | return (match_expr_eval(x->u.binary.left, |
0ab7befa | 1240 | bol, eol, ctx, 0) || |
d7eb527d | 1241 | match_expr_eval(x->u.binary.right, |
0ab7befa | 1242 | bol, eol, ctx, 0)); |
d7eb527d | 1243 | h = match_expr_eval(x->u.binary.left, bol, eol, ctx, 0); |
0ab7befa | 1244 | x->u.binary.left->hit |= h; |
d7eb527d | 1245 | h |= match_expr_eval(x->u.binary.right, bol, eol, ctx, 1); |
0ab7befa JH |
1246 | break; |
1247 | default: | |
d7530708 | 1248 | die("Unexpected node type (internal error) %d", x->node); |
83b5d2f5 | 1249 | } |
0ab7befa JH |
1250 | if (collect_hits) |
1251 | x->hit |= h; | |
1252 | return h; | |
83b5d2f5 JH |
1253 | } |
1254 | ||
480c1ca6 | 1255 | static int match_expr(struct grep_opt *opt, char *bol, char *eol, |
0ab7befa | 1256 | enum grep_context ctx, int collect_hits) |
83b5d2f5 JH |
1257 | { |
1258 | struct grep_expr *x = opt->pattern_expression; | |
d7eb527d | 1259 | return match_expr_eval(x, bol, eol, ctx, collect_hits); |
83b5d2f5 JH |
1260 | } |
1261 | ||
480c1ca6 | 1262 | static int match_line(struct grep_opt *opt, char *bol, char *eol, |
0ab7befa | 1263 | enum grep_context ctx, int collect_hits) |
83b5d2f5 JH |
1264 | { |
1265 | struct grep_pat *p; | |
79212772 RS |
1266 | regmatch_t match; |
1267 | ||
83b5d2f5 | 1268 | if (opt->extended) |
0ab7befa JH |
1269 | return match_expr(opt, bol, eol, ctx, collect_hits); |
1270 | ||
1271 | /* we do not call with collect_hits without being extended */ | |
83b5d2f5 | 1272 | for (p = opt->pattern_list; p; p = p->next) { |
79212772 | 1273 | if (match_one_pattern(p, bol, eol, ctx, &match, 0)) |
83b5d2f5 JH |
1274 | return 1; |
1275 | } | |
1276 | return 0; | |
1277 | } | |
1278 | ||
7e8f59d5 RS |
1279 | static int match_next_pattern(struct grep_pat *p, char *bol, char *eol, |
1280 | enum grep_context ctx, | |
1281 | regmatch_t *pmatch, int eflags) | |
1282 | { | |
1283 | regmatch_t match; | |
1284 | ||
1285 | if (!match_one_pattern(p, bol, eol, ctx, &match, eflags)) | |
1286 | return 0; | |
1287 | if (match.rm_so < 0 || match.rm_eo < 0) | |
1288 | return 0; | |
1289 | if (pmatch->rm_so >= 0 && pmatch->rm_eo >= 0) { | |
1290 | if (match.rm_so > pmatch->rm_so) | |
1291 | return 1; | |
1292 | if (match.rm_so == pmatch->rm_so && match.rm_eo < pmatch->rm_eo) | |
1293 | return 1; | |
1294 | } | |
1295 | pmatch->rm_so = match.rm_so; | |
1296 | pmatch->rm_eo = match.rm_eo; | |
1297 | return 1; | |
1298 | } | |
1299 | ||
1300 | static int next_match(struct grep_opt *opt, char *bol, char *eol, | |
1301 | enum grep_context ctx, regmatch_t *pmatch, int eflags) | |
1302 | { | |
1303 | struct grep_pat *p; | |
1304 | int hit = 0; | |
1305 | ||
1306 | pmatch->rm_so = pmatch->rm_eo = -1; | |
1307 | if (bol < eol) { | |
1308 | for (p = opt->pattern_list; p; p = p->next) { | |
1309 | switch (p->token) { | |
1310 | case GREP_PATTERN: /* atom */ | |
1311 | case GREP_PATTERN_HEAD: | |
1312 | case GREP_PATTERN_BODY: | |
1313 | hit |= match_next_pattern(p, bol, eol, ctx, | |
1314 | pmatch, eflags); | |
1315 | break; | |
1316 | default: | |
1317 | break; | |
1318 | } | |
1319 | } | |
1320 | } | |
1321 | return hit; | |
1322 | } | |
1323 | ||
1324 | static void show_line(struct grep_opt *opt, char *bol, char *eol, | |
1325 | const char *name, unsigned lno, char sign) | |
1326 | { | |
1327 | int rest = eol - bol; | |
79a77109 | 1328 | const char *match_color, *line_color = NULL; |
7e8f59d5 | 1329 | |
a8f0e764 RS |
1330 | if (opt->file_break && opt->last_shown == 0) { |
1331 | if (opt->show_hunk_mark) | |
1332 | opt->output(opt, "\n", 1); | |
ba8ea749 | 1333 | } else if (opt->pre_context || opt->post_context || opt->funcbody) { |
046802d0 | 1334 | if (opt->last_shown == 0) { |
55f638bd ML |
1335 | if (opt->show_hunk_mark) { |
1336 | output_color(opt, "--", 2, opt->color_sep); | |
1337 | opt->output(opt, "\n", 1); | |
07b838f0 | 1338 | } |
55f638bd ML |
1339 | } else if (lno > opt->last_shown + 1) { |
1340 | output_color(opt, "--", 2, opt->color_sep); | |
1341 | opt->output(opt, "\n", 1); | |
1342 | } | |
5dd06d38 | 1343 | } |
1d84f72e RS |
1344 | if (opt->heading && opt->last_shown == 0) { |
1345 | output_color(opt, name, strlen(name), opt->color_filename); | |
1346 | opt->output(opt, "\n", 1); | |
1347 | } | |
5dd06d38 RS |
1348 | opt->last_shown = lno; |
1349 | ||
1d84f72e | 1350 | if (!opt->heading && opt->pathname) { |
55f638bd ML |
1351 | output_color(opt, name, strlen(name), opt->color_filename); |
1352 | output_sep(opt, sign); | |
5b594f45 FK |
1353 | } |
1354 | if (opt->linenum) { | |
1355 | char buf[32]; | |
1a168e5c | 1356 | xsnprintf(buf, sizeof(buf), "%d", lno); |
55f638bd ML |
1357 | output_color(opt, buf, strlen(buf), opt->color_lineno); |
1358 | output_sep(opt, sign); | |
5b594f45 | 1359 | } |
7e8f59d5 RS |
1360 | if (opt->color) { |
1361 | regmatch_t match; | |
1362 | enum grep_context ctx = GREP_CONTEXT_BODY; | |
1363 | int ch = *eol; | |
1364 | int eflags = 0; | |
1365 | ||
79a77109 RS |
1366 | if (sign == ':') |
1367 | match_color = opt->color_match_selected; | |
1368 | else | |
1369 | match_color = opt->color_match_context; | |
00588bb5 ML |
1370 | if (sign == ':') |
1371 | line_color = opt->color_selected; | |
1372 | else if (sign == '-') | |
1373 | line_color = opt->color_context; | |
1374 | else if (sign == '=') | |
1375 | line_color = opt->color_function; | |
7e8f59d5 RS |
1376 | *eol = '\0'; |
1377 | while (next_match(opt, bol, eol, ctx, &match, eflags)) { | |
1f5b9cc4 RS |
1378 | if (match.rm_so == match.rm_eo) |
1379 | break; | |
5b594f45 | 1380 | |
00588bb5 | 1381 | output_color(opt, bol, match.rm_so, line_color); |
55f638bd | 1382 | output_color(opt, bol + match.rm_so, |
79a77109 | 1383 | match.rm_eo - match.rm_so, match_color); |
7e8f59d5 RS |
1384 | bol += match.rm_eo; |
1385 | rest -= match.rm_eo; | |
1386 | eflags = REG_NOTBOL; | |
1387 | } | |
1388 | *eol = ch; | |
1389 | } | |
00588bb5 | 1390 | output_color(opt, bol, rest, line_color); |
5b594f45 | 1391 | opt->output(opt, "\n", 1); |
7e8f59d5 RS |
1392 | } |
1393 | ||
0579f91d | 1394 | #ifndef NO_PTHREADS |
78db6ea9 JK |
1395 | int grep_use_locks; |
1396 | ||
0579f91d TR |
1397 | /* |
1398 | * This lock protects access to the gitattributes machinery, which is | |
1399 | * not thread-safe. | |
1400 | */ | |
1401 | pthread_mutex_t grep_attr_mutex; | |
1402 | ||
78db6ea9 | 1403 | static inline void grep_attr_lock(void) |
0579f91d | 1404 | { |
78db6ea9 | 1405 | if (grep_use_locks) |
0579f91d TR |
1406 | pthread_mutex_lock(&grep_attr_mutex); |
1407 | } | |
1408 | ||
78db6ea9 | 1409 | static inline void grep_attr_unlock(void) |
0579f91d | 1410 | { |
78db6ea9 | 1411 | if (grep_use_locks) |
0579f91d TR |
1412 | pthread_mutex_unlock(&grep_attr_mutex); |
1413 | } | |
b3aeb285 JK |
1414 | |
1415 | /* | |
1416 | * Same as git_attr_mutex, but protecting the thread-unsafe object db access. | |
1417 | */ | |
1418 | pthread_mutex_t grep_read_mutex; | |
1419 | ||
0579f91d | 1420 | #else |
78db6ea9 JK |
1421 | #define grep_attr_lock() |
1422 | #define grep_attr_unlock() | |
0579f91d TR |
1423 | #endif |
1424 | ||
e1327023 | 1425 | static int match_funcname(struct grep_opt *opt, struct grep_source *gs, char *bol, char *eol) |
2944e4e6 | 1426 | { |
60ecac98 | 1427 | xdemitconf_t *xecfg = opt->priv; |
0579f91d | 1428 | if (xecfg && !xecfg->find_func) { |
94ad9d9e JK |
1429 | grep_source_load_driver(gs); |
1430 | if (gs->driver->funcname.pattern) { | |
1431 | const struct userdiff_funcname *pe = &gs->driver->funcname; | |
0579f91d TR |
1432 | xdiff_set_find_func(xecfg, pe->pattern, pe->cflags); |
1433 | } else { | |
1434 | xecfg = opt->priv = NULL; | |
1435 | } | |
1436 | } | |
1437 | ||
1438 | if (xecfg) { | |
60ecac98 RS |
1439 | char buf[1]; |
1440 | return xecfg->find_func(bol, eol - bol, buf, 1, | |
1441 | xecfg->find_func_priv) >= 0; | |
1442 | } | |
1443 | ||
2944e4e6 RS |
1444 | if (bol == eol) |
1445 | return 0; | |
1446 | if (isalpha(*bol) || *bol == '_' || *bol == '$') | |
1447 | return 1; | |
1448 | return 0; | |
1449 | } | |
1450 | ||
e1327023 JK |
1451 | static void show_funcname_line(struct grep_opt *opt, struct grep_source *gs, |
1452 | char *bol, unsigned lno) | |
2944e4e6 | 1453 | { |
e1327023 | 1454 | while (bol > gs->buf) { |
2944e4e6 RS |
1455 | char *eol = --bol; |
1456 | ||
e1327023 | 1457 | while (bol > gs->buf && bol[-1] != '\n') |
2944e4e6 RS |
1458 | bol--; |
1459 | lno--; | |
1460 | ||
1461 | if (lno <= opt->last_shown) | |
1462 | break; | |
1463 | ||
e1327023 JK |
1464 | if (match_funcname(opt, gs, bol, eol)) { |
1465 | show_line(opt, bol, eol, gs->name, lno, '='); | |
2944e4e6 RS |
1466 | break; |
1467 | } | |
1468 | } | |
1469 | } | |
1470 | ||
e1327023 | 1471 | static void show_pre_context(struct grep_opt *opt, struct grep_source *gs, |
ba8ea749 | 1472 | char *bol, char *end, unsigned lno) |
49de3216 | 1473 | { |
2944e4e6 | 1474 | unsigned cur = lno, from = 1, funcname_lno = 0; |
ba8ea749 RS |
1475 | int funcname_needed = !!opt->funcname; |
1476 | ||
e1327023 | 1477 | if (opt->funcbody && !match_funcname(opt, gs, bol, end)) |
ba8ea749 | 1478 | funcname_needed = 2; |
49de3216 RS |
1479 | |
1480 | if (opt->pre_context < lno) | |
1481 | from = lno - opt->pre_context; | |
1482 | if (from <= opt->last_shown) | |
1483 | from = opt->last_shown + 1; | |
1484 | ||
1485 | /* Rewind. */ | |
e1327023 | 1486 | while (bol > gs->buf && |
ba8ea749 | 1487 | cur > (funcname_needed == 2 ? opt->last_shown + 1 : from)) { |
2944e4e6 RS |
1488 | char *eol = --bol; |
1489 | ||
e1327023 | 1490 | while (bol > gs->buf && bol[-1] != '\n') |
49de3216 RS |
1491 | bol--; |
1492 | cur--; | |
e1327023 | 1493 | if (funcname_needed && match_funcname(opt, gs, bol, eol)) { |
2944e4e6 RS |
1494 | funcname_lno = cur; |
1495 | funcname_needed = 0; | |
1496 | } | |
49de3216 RS |
1497 | } |
1498 | ||
2944e4e6 RS |
1499 | /* We need to look even further back to find a function signature. */ |
1500 | if (opt->funcname && funcname_needed) | |
e1327023 | 1501 | show_funcname_line(opt, gs, bol, cur); |
2944e4e6 | 1502 | |
49de3216 RS |
1503 | /* Back forward. */ |
1504 | while (cur < lno) { | |
2944e4e6 | 1505 | char *eol = bol, sign = (cur == funcname_lno) ? '=' : '-'; |
49de3216 RS |
1506 | |
1507 | while (*eol != '\n') | |
1508 | eol++; | |
e1327023 | 1509 | show_line(opt, bol, eol, gs->name, cur, sign); |
49de3216 RS |
1510 | bol = eol + 1; |
1511 | cur++; | |
1512 | } | |
1513 | } | |
1514 | ||
a26345b6 JH |
1515 | static int should_lookahead(struct grep_opt *opt) |
1516 | { | |
1517 | struct grep_pat *p; | |
1518 | ||
1519 | if (opt->extended) | |
1520 | return 0; /* punt for too complex stuff */ | |
1521 | if (opt->invert) | |
1522 | return 0; | |
1523 | for (p = opt->pattern_list; p; p = p->next) { | |
1524 | if (p->token != GREP_PATTERN) | |
1525 | return 0; /* punt for "header only" and stuff */ | |
1526 | } | |
1527 | return 1; | |
1528 | } | |
1529 | ||
1530 | static int look_ahead(struct grep_opt *opt, | |
1531 | unsigned long *left_p, | |
1532 | unsigned *lno_p, | |
1533 | char **bol_p) | |
1534 | { | |
1535 | unsigned lno = *lno_p; | |
1536 | char *bol = *bol_p; | |
1537 | struct grep_pat *p; | |
1538 | char *sp, *last_bol; | |
1539 | regoff_t earliest = -1; | |
1540 | ||
1541 | for (p = opt->pattern_list; p; p = p->next) { | |
1542 | int hit; | |
1543 | regmatch_t m; | |
1544 | ||
97e77784 | 1545 | hit = patmatch(p, bol, bol + *left_p, &m, 0); |
a26345b6 JH |
1546 | if (!hit || m.rm_so < 0 || m.rm_eo < 0) |
1547 | continue; | |
1548 | if (earliest < 0 || m.rm_so < earliest) | |
1549 | earliest = m.rm_so; | |
1550 | } | |
1551 | ||
1552 | if (earliest < 0) { | |
1553 | *bol_p = bol + *left_p; | |
1554 | *left_p = 0; | |
1555 | return 1; | |
1556 | } | |
1557 | for (sp = bol + earliest; bol < sp && sp[-1] != '\n'; sp--) | |
1558 | ; /* find the beginning of the line */ | |
1559 | last_bol = sp; | |
1560 | ||
1561 | for (sp = bol; sp < last_bol; sp++) { | |
1562 | if (*sp == '\n') | |
1563 | lno++; | |
1564 | } | |
1565 | *left_p -= last_bol - bol; | |
1566 | *bol_p = last_bol; | |
1567 | *lno_p = lno; | |
1568 | return 0; | |
1569 | } | |
1570 | ||
335ec3bf JK |
1571 | static int fill_textconv_grep(struct userdiff_driver *driver, |
1572 | struct grep_source *gs) | |
1573 | { | |
1574 | struct diff_filespec *df; | |
1575 | char *buf; | |
1576 | size_t size; | |
1577 | ||
1578 | if (!driver || !driver->textconv) | |
1579 | return grep_source_load(gs); | |
1580 | ||
1581 | /* | |
1582 | * The textconv interface is intimately tied to diff_filespecs, so we | |
1583 | * have to pretend to be one. If we could unify the grep_source | |
1584 | * and diff_filespec structs, this mess could just go away. | |
1585 | */ | |
1586 | df = alloc_filespec(gs->path); | |
1587 | switch (gs->type) { | |
1c41c82b | 1588 | case GREP_SOURCE_OID: |
335ec3bf JK |
1589 | fill_filespec(df, gs->identifier, 1, 0100644); |
1590 | break; | |
1591 | case GREP_SOURCE_FILE: | |
f9704c2d | 1592 | fill_filespec(df, &null_oid, 0, 0100644); |
335ec3bf JK |
1593 | break; |
1594 | default: | |
1595 | die("BUG: attempt to textconv something without a path?"); | |
1596 | } | |
1597 | ||
1598 | /* | |
1599 | * fill_textconv is not remotely thread-safe; it may load objects | |
1600 | * behind the scenes, and it modifies the global diff tempfile | |
1601 | * structure. | |
1602 | */ | |
1603 | grep_read_lock(); | |
1604 | size = fill_textconv(driver, df, &buf); | |
1605 | grep_read_unlock(); | |
1606 | free_filespec(df); | |
1607 | ||
1608 | /* | |
1609 | * The normal fill_textconv usage by the diff machinery would just keep | |
1610 | * the textconv'd buf separate from the diff_filespec. But much of the | |
1611 | * grep code passes around a grep_source and assumes that its "buf" | |
1612 | * pointer is the beginning of the thing we are searching. So let's | |
1613 | * install our textconv'd version into the grep_source, taking care not | |
1614 | * to leak any existing buffer. | |
1615 | */ | |
1616 | grep_source_clear_data(gs); | |
1617 | gs->buf = buf; | |
1618 | gs->size = size; | |
1619 | ||
1620 | return 0; | |
1621 | } | |
1622 | ||
4aa2c475 RS |
1623 | static int is_empty_line(const char *bol, const char *eol) |
1624 | { | |
1625 | while (bol < eol && isspace(*bol)) | |
1626 | bol++; | |
1627 | return bol == eol; | |
1628 | } | |
1629 | ||
e1327023 | 1630 | static int grep_source_1(struct grep_opt *opt, struct grep_source *gs, int collect_hits) |
83b5d2f5 | 1631 | { |
e1327023 | 1632 | char *bol; |
4aa2c475 | 1633 | char *peek_bol = NULL; |
e1327023 | 1634 | unsigned long left; |
83b5d2f5 | 1635 | unsigned lno = 1; |
83b5d2f5 | 1636 | unsigned last_hit = 0; |
83b5d2f5 | 1637 | int binary_match_only = 0; |
83b5d2f5 | 1638 | unsigned count = 0; |
a26345b6 | 1639 | int try_lookahead = 0; |
ba8ea749 | 1640 | int show_function = 0; |
335ec3bf | 1641 | struct userdiff_driver *textconv = NULL; |
480c1ca6 | 1642 | enum grep_context ctx = GREP_CONTEXT_HEAD; |
60ecac98 | 1643 | xdemitconf_t xecfg; |
83b5d2f5 | 1644 | |
5b594f45 FK |
1645 | if (!opt->output) |
1646 | opt->output = std_output; | |
1647 | ||
ba8ea749 RS |
1648 | if (opt->pre_context || opt->post_context || opt->file_break || |
1649 | opt->funcbody) { | |
08303c36 RS |
1650 | /* Show hunk marks, except for the first file. */ |
1651 | if (opt->last_shown) | |
1652 | opt->show_hunk_mark = 1; | |
1653 | /* | |
1654 | * If we're using threads then we can't easily identify | |
1655 | * the first file. Always put hunk marks in that case | |
1656 | * and skip the very first one later in work_done(). | |
1657 | */ | |
1658 | if (opt->output != std_output) | |
1659 | opt->show_hunk_mark = 1; | |
1660 | } | |
431d6e7b RS |
1661 | opt->last_shown = 0; |
1662 | ||
335ec3bf JK |
1663 | if (opt->allow_textconv) { |
1664 | grep_source_load_driver(gs); | |
1665 | /* | |
1666 | * We might set up the shared textconv cache data here, which | |
1667 | * is not thread-safe. | |
1668 | */ | |
1669 | grep_attr_lock(); | |
1670 | textconv = userdiff_get_textconv(gs->driver); | |
1671 | grep_attr_unlock(); | |
1672 | } | |
1673 | ||
1674 | /* | |
1675 | * We know the result of a textconv is text, so we only have to care | |
1676 | * about binary handling if we are not using it. | |
1677 | */ | |
1678 | if (!textconv) { | |
1679 | switch (opt->binary) { | |
1680 | case GREP_BINARY_DEFAULT: | |
1681 | if (grep_source_is_binary(gs)) | |
1682 | binary_match_only = 1; | |
1683 | break; | |
1684 | case GREP_BINARY_NOMATCH: | |
1685 | if (grep_source_is_binary(gs)) | |
1686 | return 0; /* Assume unmatch */ | |
1687 | break; | |
1688 | case GREP_BINARY_TEXT: | |
1689 | break; | |
1690 | default: | |
ef1177d1 | 1691 | die("BUG: unknown binary handling mode"); |
335ec3bf | 1692 | } |
83b5d2f5 JH |
1693 | } |
1694 | ||
60ecac98 | 1695 | memset(&xecfg, 0, sizeof(xecfg)); |
0579f91d TR |
1696 | opt->priv = &xecfg; |
1697 | ||
a26345b6 | 1698 | try_lookahead = should_lookahead(opt); |
60ecac98 | 1699 | |
335ec3bf | 1700 | if (fill_textconv_grep(textconv, gs) < 0) |
08265798 JK |
1701 | return 0; |
1702 | ||
e1327023 JK |
1703 | bol = gs->buf; |
1704 | left = gs->size; | |
83b5d2f5 JH |
1705 | while (left) { |
1706 | char *eol, ch; | |
0ab7befa | 1707 | int hit; |
83b5d2f5 | 1708 | |
a26345b6 | 1709 | /* |
8997da38 | 1710 | * look_ahead() skips quickly to the line that possibly |
a26345b6 JH |
1711 | * has the next hit; don't call it if we need to do |
1712 | * something more than just skipping the current line | |
1713 | * in response to an unmatch for the current line. E.g. | |
1714 | * inside a post-context window, we will show the current | |
1715 | * line as a context around the previous hit when it | |
1716 | * doesn't hit. | |
1717 | */ | |
1718 | if (try_lookahead | |
1719 | && !(last_hit | |
ba8ea749 RS |
1720 | && (show_function || |
1721 | lno <= last_hit + opt->post_context)) | |
a26345b6 JH |
1722 | && look_ahead(opt, &left, &lno, &bol)) |
1723 | break; | |
83b5d2f5 JH |
1724 | eol = end_of_line(bol, &left); |
1725 | ch = *eol; | |
1726 | *eol = 0; | |
1727 | ||
480c1ca6 JH |
1728 | if ((ctx == GREP_CONTEXT_HEAD) && (eol == bol)) |
1729 | ctx = GREP_CONTEXT_BODY; | |
1730 | ||
0ab7befa | 1731 | hit = match_line(opt, bol, eol, ctx, collect_hits); |
83b5d2f5 JH |
1732 | *eol = ch; |
1733 | ||
0ab7befa JH |
1734 | if (collect_hits) |
1735 | goto next_line; | |
1736 | ||
83b5d2f5 JH |
1737 | /* "grep -v -e foo -e bla" should list lines |
1738 | * that do not have either, so inversion should | |
1739 | * be done outside. | |
1740 | */ | |
1741 | if (opt->invert) | |
1742 | hit = !hit; | |
1743 | if (opt->unmatch_name_only) { | |
1744 | if (hit) | |
1745 | return 0; | |
1746 | goto next_line; | |
1747 | } | |
1748 | if (hit) { | |
1749 | count++; | |
1750 | if (opt->status_only) | |
1751 | return 1; | |
321ffcc0 | 1752 | if (opt->name_only) { |
e1327023 | 1753 | show_name(opt, gs->name); |
321ffcc0 RS |
1754 | return 1; |
1755 | } | |
c30c10cf RS |
1756 | if (opt->count) |
1757 | goto next_line; | |
83b5d2f5 | 1758 | if (binary_match_only) { |
5b594f45 | 1759 | opt->output(opt, "Binary file ", 12); |
e1327023 | 1760 | output_color(opt, gs->name, strlen(gs->name), |
55f638bd | 1761 | opt->color_filename); |
5b594f45 | 1762 | opt->output(opt, " matches\n", 9); |
83b5d2f5 JH |
1763 | return 1; |
1764 | } | |
83b5d2f5 JH |
1765 | /* Hit at this line. If we haven't shown the |
1766 | * pre-context lines, we would need to show them. | |
83b5d2f5 | 1767 | */ |
ba8ea749 | 1768 | if (opt->pre_context || opt->funcbody) |
e1327023 | 1769 | show_pre_context(opt, gs, bol, eol, lno); |
2944e4e6 | 1770 | else if (opt->funcname) |
e1327023 JK |
1771 | show_funcname_line(opt, gs, bol, lno); |
1772 | show_line(opt, bol, eol, gs->name, lno, ':'); | |
5dd06d38 | 1773 | last_hit = lno; |
ba8ea749 RS |
1774 | if (opt->funcbody) |
1775 | show_function = 1; | |
1776 | goto next_line; | |
83b5d2f5 | 1777 | } |
4aa2c475 RS |
1778 | if (show_function && (!peek_bol || peek_bol < bol)) { |
1779 | unsigned long peek_left = left; | |
1780 | char *peek_eol = eol; | |
1781 | ||
1782 | /* | |
1783 | * Trailing empty lines are not interesting. | |
1784 | * Peek past them to see if they belong to the | |
1785 | * body of the current function. | |
1786 | */ | |
1787 | peek_bol = bol; | |
1788 | while (is_empty_line(peek_bol, peek_eol)) { | |
1789 | peek_bol = peek_eol + 1; | |
1790 | peek_eol = end_of_line(peek_bol, &peek_left); | |
1791 | } | |
1792 | ||
1793 | if (match_funcname(opt, gs, peek_bol, peek_eol)) | |
1794 | show_function = 0; | |
1795 | } | |
ba8ea749 RS |
1796 | if (show_function || |
1797 | (last_hit && lno <= last_hit + opt->post_context)) { | |
83b5d2f5 JH |
1798 | /* If the last hit is within the post context, |
1799 | * we need to show this line. | |
1800 | */ | |
e1327023 | 1801 | show_line(opt, bol, eol, gs->name, lno, '-'); |
83b5d2f5 | 1802 | } |
83b5d2f5 JH |
1803 | |
1804 | next_line: | |
1805 | bol = eol + 1; | |
1806 | if (!left) | |
1807 | break; | |
1808 | left--; | |
1809 | lno++; | |
1810 | } | |
1811 | ||
0ab7befa JH |
1812 | if (collect_hits) |
1813 | return 0; | |
b48fb5b6 | 1814 | |
83b5d2f5 JH |
1815 | if (opt->status_only) |
1816 | return 0; | |
1817 | if (opt->unmatch_name_only) { | |
1818 | /* We did not see any hit, so we want to show this */ | |
e1327023 | 1819 | show_name(opt, gs->name); |
83b5d2f5 JH |
1820 | return 1; |
1821 | } | |
1822 | ||
60ecac98 RS |
1823 | xdiff_clear_find_func(&xecfg); |
1824 | opt->priv = NULL; | |
1825 | ||
83b5d2f5 JH |
1826 | /* NEEDSWORK: |
1827 | * The real "grep -c foo *.c" gives many "bar.c:0" lines, | |
1828 | * which feels mostly useless but sometimes useful. Maybe | |
1829 | * make it another option? For now suppress them. | |
1830 | */ | |
5b594f45 FK |
1831 | if (opt->count && count) { |
1832 | char buf[32]; | |
f76d947a RS |
1833 | if (opt->pathname) { |
1834 | output_color(opt, gs->name, strlen(gs->name), | |
1835 | opt->color_filename); | |
1836 | output_sep(opt, ':'); | |
1837 | } | |
1a168e5c | 1838 | xsnprintf(buf, sizeof(buf), "%u\n", count); |
5b594f45 | 1839 | opt->output(opt, buf, strlen(buf)); |
c30c10cf | 1840 | return 1; |
5b594f45 | 1841 | } |
83b5d2f5 JH |
1842 | return !!last_hit; |
1843 | } | |
1844 | ||
0ab7befa JH |
1845 | static void clr_hit_marker(struct grep_expr *x) |
1846 | { | |
1847 | /* All-hit markers are meaningful only at the very top level | |
1848 | * OR node. | |
1849 | */ | |
1850 | while (1) { | |
1851 | x->hit = 0; | |
1852 | if (x->node != GREP_NODE_OR) | |
1853 | return; | |
1854 | x->u.binary.left->hit = 0; | |
1855 | x = x->u.binary.right; | |
1856 | } | |
1857 | } | |
1858 | ||
1859 | static int chk_hit_marker(struct grep_expr *x) | |
1860 | { | |
1861 | /* Top level nodes have hit markers. See if they all are hits */ | |
1862 | while (1) { | |
1863 | if (x->node != GREP_NODE_OR) | |
1864 | return x->hit; | |
1865 | if (!x->u.binary.left->hit) | |
1866 | return 0; | |
1867 | x = x->u.binary.right; | |
1868 | } | |
1869 | } | |
1870 | ||
e1327023 | 1871 | int grep_source(struct grep_opt *opt, struct grep_source *gs) |
0ab7befa JH |
1872 | { |
1873 | /* | |
1874 | * we do not have to do the two-pass grep when we do not check | |
1875 | * buffer-wide "all-match". | |
1876 | */ | |
1877 | if (!opt->all_match) | |
e1327023 | 1878 | return grep_source_1(opt, gs, 0); |
0ab7befa JH |
1879 | |
1880 | /* Otherwise the toplevel "or" terms hit a bit differently. | |
1881 | * We first clear hit markers from them. | |
1882 | */ | |
1883 | clr_hit_marker(opt->pattern_expression); | |
e1327023 | 1884 | grep_source_1(opt, gs, 1); |
0ab7befa JH |
1885 | |
1886 | if (!chk_hit_marker(opt->pattern_expression)) | |
1887 | return 0; | |
1888 | ||
e1327023 JK |
1889 | return grep_source_1(opt, gs, 0); |
1890 | } | |
1891 | ||
c876d6da | 1892 | int grep_buffer(struct grep_opt *opt, char *buf, unsigned long size) |
e1327023 JK |
1893 | { |
1894 | struct grep_source gs; | |
1895 | int r; | |
1896 | ||
55c61688 | 1897 | grep_source_init(&gs, GREP_SOURCE_BUF, NULL, NULL, NULL); |
e1327023 JK |
1898 | gs.buf = buf; |
1899 | gs.size = size; | |
1900 | ||
1901 | r = grep_source(opt, &gs); | |
1902 | ||
1903 | grep_source_clear(&gs); | |
1904 | return r; | |
1905 | } | |
1906 | ||
1907 | void grep_source_init(struct grep_source *gs, enum grep_source_type type, | |
55c61688 NTND |
1908 | const char *name, const char *path, |
1909 | const void *identifier) | |
e1327023 JK |
1910 | { |
1911 | gs->type = type; | |
8c53f071 JK |
1912 | gs->name = xstrdup_or_null(name); |
1913 | gs->path = xstrdup_or_null(path); | |
e1327023 JK |
1914 | gs->buf = NULL; |
1915 | gs->size = 0; | |
94ad9d9e | 1916 | gs->driver = NULL; |
e1327023 JK |
1917 | |
1918 | switch (type) { | |
1919 | case GREP_SOURCE_FILE: | |
1920 | gs->identifier = xstrdup(identifier); | |
1921 | break; | |
4538eef5 BW |
1922 | case GREP_SOURCE_SUBMODULE: |
1923 | if (!identifier) { | |
1924 | gs->identifier = NULL; | |
1925 | break; | |
1926 | } | |
1927 | /* | |
1928 | * FALL THROUGH | |
1929 | * If the identifier is non-NULL (in the submodule case) it | |
1930 | * will be a SHA1 that needs to be copied. | |
1931 | */ | |
1c41c82b BW |
1932 | case GREP_SOURCE_OID: |
1933 | gs->identifier = oiddup(identifier); | |
e1327023 JK |
1934 | break; |
1935 | case GREP_SOURCE_BUF: | |
1936 | gs->identifier = NULL; | |
4538eef5 | 1937 | break; |
e1327023 JK |
1938 | } |
1939 | } | |
1940 | ||
1941 | void grep_source_clear(struct grep_source *gs) | |
1942 | { | |
88ce3ef6 ÆAB |
1943 | FREE_AND_NULL(gs->name); |
1944 | FREE_AND_NULL(gs->path); | |
1945 | FREE_AND_NULL(gs->identifier); | |
e1327023 JK |
1946 | grep_source_clear_data(gs); |
1947 | } | |
1948 | ||
1949 | void grep_source_clear_data(struct grep_source *gs) | |
1950 | { | |
1951 | switch (gs->type) { | |
1952 | case GREP_SOURCE_FILE: | |
1c41c82b | 1953 | case GREP_SOURCE_OID: |
4538eef5 | 1954 | case GREP_SOURCE_SUBMODULE: |
6a83d902 | 1955 | FREE_AND_NULL(gs->buf); |
e1327023 JK |
1956 | gs->size = 0; |
1957 | break; | |
1958 | case GREP_SOURCE_BUF: | |
1959 | /* leave user-provided buf intact */ | |
1960 | break; | |
1961 | } | |
1962 | } | |
1963 | ||
1c41c82b | 1964 | static int grep_source_load_oid(struct grep_source *gs) |
e1327023 JK |
1965 | { |
1966 | enum object_type type; | |
1967 | ||
1968 | grep_read_lock(); | |
1969 | gs->buf = read_sha1_file(gs->identifier, &type, &gs->size); | |
1970 | grep_read_unlock(); | |
1971 | ||
1972 | if (!gs->buf) | |
1973 | return error(_("'%s': unable to read %s"), | |
1974 | gs->name, | |
1c41c82b | 1975 | oid_to_hex(gs->identifier)); |
e1327023 JK |
1976 | return 0; |
1977 | } | |
1978 | ||
1979 | static int grep_source_load_file(struct grep_source *gs) | |
1980 | { | |
1981 | const char *filename = gs->identifier; | |
1982 | struct stat st; | |
1983 | char *data; | |
1984 | size_t size; | |
1985 | int i; | |
1986 | ||
1987 | if (lstat(filename, &st) < 0) { | |
1988 | err_ret: | |
1989 | if (errno != ENOENT) | |
7645d8f1 | 1990 | error_errno(_("failed to stat '%s'"), filename); |
e1327023 JK |
1991 | return -1; |
1992 | } | |
1993 | if (!S_ISREG(st.st_mode)) | |
1994 | return -1; | |
1995 | size = xsize_t(st.st_size); | |
1996 | i = open(filename, O_RDONLY); | |
1997 | if (i < 0) | |
1998 | goto err_ret; | |
3733e694 | 1999 | data = xmallocz(size); |
e1327023 | 2000 | if (st.st_size != read_in_full(i, data, size)) { |
7645d8f1 | 2001 | error_errno(_("'%s': short read"), filename); |
e1327023 JK |
2002 | close(i); |
2003 | free(data); | |
2004 | return -1; | |
2005 | } | |
2006 | close(i); | |
e1327023 JK |
2007 | |
2008 | gs->buf = data; | |
2009 | gs->size = size; | |
2010 | return 0; | |
2011 | } | |
2012 | ||
3083301e | 2013 | static int grep_source_load(struct grep_source *gs) |
e1327023 JK |
2014 | { |
2015 | if (gs->buf) | |
2016 | return 0; | |
2017 | ||
2018 | switch (gs->type) { | |
2019 | case GREP_SOURCE_FILE: | |
2020 | return grep_source_load_file(gs); | |
1c41c82b BW |
2021 | case GREP_SOURCE_OID: |
2022 | return grep_source_load_oid(gs); | |
e1327023 JK |
2023 | case GREP_SOURCE_BUF: |
2024 | return gs->buf ? 0 : -1; | |
4538eef5 BW |
2025 | case GREP_SOURCE_SUBMODULE: |
2026 | break; | |
e1327023 | 2027 | } |
4538eef5 | 2028 | die("BUG: invalid grep_source type to load"); |
0ab7befa | 2029 | } |
94ad9d9e JK |
2030 | |
2031 | void grep_source_load_driver(struct grep_source *gs) | |
2032 | { | |
2033 | if (gs->driver) | |
2034 | return; | |
2035 | ||
2036 | grep_attr_lock(); | |
55c61688 NTND |
2037 | if (gs->path) |
2038 | gs->driver = userdiff_find_by_path(gs->path); | |
94ad9d9e JK |
2039 | if (!gs->driver) |
2040 | gs->driver = userdiff_find_by_name("default"); | |
2041 | grep_attr_unlock(); | |
2042 | } | |
41b59bfc | 2043 | |
3083301e | 2044 | static int grep_source_is_binary(struct grep_source *gs) |
41b59bfc JK |
2045 | { |
2046 | grep_source_load_driver(gs); | |
2047 | if (gs->driver->binary != -1) | |
2048 | return gs->driver->binary; | |
2049 | ||
2050 | if (!grep_source_load(gs)) | |
2051 | return buffer_is_binary(gs->buf, gs->size); | |
2052 | ||
2053 | return 0; | |
2054 | } |