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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 | |
96313423 MÅ |
17 | static void std_output(struct grep_opt *opt, const void *buf, size_t size) |
18 | { | |
19 | fwrite(buf, size, 1, stdout); | |
20 | } | |
21 | ||
22 | static struct grep_opt grep_defaults = { | |
23 | .relative = 1, | |
24 | .pathname = 1, | |
25 | .max_depth = -1, | |
26 | .pattern_type_option = GREP_PATTERN_TYPE_UNSPECIFIED, | |
27 | .colors = { | |
28 | [GREP_COLOR_CONTEXT] = "", | |
29 | [GREP_COLOR_FILENAME] = "", | |
30 | [GREP_COLOR_FUNCTION] = "", | |
31 | [GREP_COLOR_LINENO] = "", | |
32 | [GREP_COLOR_COLUMNNO] = "", | |
33 | [GREP_COLOR_MATCH_CONTEXT] = GIT_COLOR_BOLD_RED, | |
34 | [GREP_COLOR_MATCH_SELECTED] = GIT_COLOR_BOLD_RED, | |
35 | [GREP_COLOR_SELECTED] = "", | |
36 | [GREP_COLOR_SEP] = GIT_COLOR_CYAN, | |
37 | }, | |
38 | .only_matching = 0, | |
39 | .color = -1, | |
40 | .output = std_output, | |
41 | }; | |
7687a054 | 42 | |
fa151dc5 NTND |
43 | static const char *color_grep_slots[] = { |
44 | [GREP_COLOR_CONTEXT] = "context", | |
45 | [GREP_COLOR_FILENAME] = "filename", | |
46 | [GREP_COLOR_FUNCTION] = "function", | |
47 | [GREP_COLOR_LINENO] = "lineNumber", | |
d036d667 | 48 | [GREP_COLOR_COLUMNNO] = "column", |
fa151dc5 NTND |
49 | [GREP_COLOR_MATCH_CONTEXT] = "matchContext", |
50 | [GREP_COLOR_MATCH_SELECTED] = "matchSelected", | |
51 | [GREP_COLOR_SELECTED] = "selected", | |
52 | [GREP_COLOR_SEP] = "separator", | |
53 | }; | |
54 | ||
7687a054 JH |
55 | static int parse_pattern_type_arg(const char *opt, const char *arg) |
56 | { | |
57 | if (!strcmp(arg, "default")) | |
58 | return GREP_PATTERN_TYPE_UNSPECIFIED; | |
59 | else if (!strcmp(arg, "basic")) | |
60 | return GREP_PATTERN_TYPE_BRE; | |
61 | else if (!strcmp(arg, "extended")) | |
62 | return GREP_PATTERN_TYPE_ERE; | |
63 | else if (!strcmp(arg, "fixed")) | |
64 | return GREP_PATTERN_TYPE_FIXED; | |
65 | else if (!strcmp(arg, "perl")) | |
66 | return GREP_PATTERN_TYPE_PCRE; | |
67 | die("bad %s argument: %s", opt, arg); | |
68 | } | |
69 | ||
3ac68a93 NTND |
70 | define_list_config_array_extra(color_grep_slots, {"match"}); |
71 | ||
7687a054 JH |
72 | /* |
73 | * Read the configuration file once and store it in | |
74 | * the grep_defaults template. | |
75 | */ | |
76 | int grep_config(const char *var, const char *value, void *cb) | |
77 | { | |
78 | struct grep_opt *opt = &grep_defaults; | |
fa151dc5 | 79 | const char *slot; |
7687a054 JH |
80 | |
81 | if (userdiff_config(var, value) < 0) | |
82 | return -1; | |
83 | ||
6ba9bb76 MÅ |
84 | /* |
85 | * The instance of grep_opt that we set up here is copied by | |
86 | * grep_init() to be used by each individual invocation. | |
87 | * When populating a new field of this structure here, be | |
88 | * sure to think about ownership -- e.g., you might need to | |
89 | * override the shallow copy in grep_init() with a deep copy. | |
90 | */ | |
91 | ||
7687a054 | 92 | if (!strcmp(var, "grep.extendedregexp")) { |
c7e38551 | 93 | opt->extended_regexp_option = git_config_bool(var, value); |
7687a054 JH |
94 | return 0; |
95 | } | |
96 | ||
97 | if (!strcmp(var, "grep.patterntype")) { | |
98 | opt->pattern_type_option = parse_pattern_type_arg(var, value); | |
99 | return 0; | |
100 | } | |
101 | ||
102 | if (!strcmp(var, "grep.linenumber")) { | |
103 | opt->linenum = git_config_bool(var, value); | |
104 | return 0; | |
105 | } | |
6653fec3 TB |
106 | if (!strcmp(var, "grep.column")) { |
107 | opt->columnnum = git_config_bool(var, value); | |
108 | return 0; | |
109 | } | |
7687a054 | 110 | |
6453f7b3 AS |
111 | if (!strcmp(var, "grep.fullname")) { |
112 | opt->relative = !git_config_bool(var, value); | |
113 | return 0; | |
114 | } | |
115 | ||
7687a054 JH |
116 | if (!strcmp(var, "color.grep")) |
117 | opt->color = git_config_colorbool(var, value); | |
fa151dc5 NTND |
118 | if (!strcmp(var, "color.grep.match")) { |
119 | if (grep_config("color.grep.matchcontext", value, cb) < 0) | |
120 | return -1; | |
121 | if (grep_config("color.grep.matchselected", value, cb) < 0) | |
122 | return -1; | |
123 | } else if (skip_prefix(var, "color.grep.", &slot)) { | |
124 | int i = LOOKUP_CONFIG(color_grep_slots, slot); | |
125 | char *color; | |
126 | ||
127 | if (i < 0) | |
128 | return -1; | |
129 | color = opt->colors[i]; | |
7687a054 JH |
130 | if (!value) |
131 | return config_error_nonbool(var); | |
f6c5a296 | 132 | return color_parse(value, color); |
7687a054 JH |
133 | } |
134 | return 0; | |
135 | } | |
136 | ||
137 | /* | |
138 | * Initialize one instance of grep_opt and copy the | |
139 | * default values from the template we read the configuration | |
140 | * information in an earlier call to git_config(grep_config). | |
141 | */ | |
38bbc2ea | 142 | void grep_init(struct grep_opt *opt, struct repository *repo, const char *prefix) |
7687a054 | 143 | { |
6ba9bb76 MÅ |
144 | *opt = grep_defaults; |
145 | ||
38bbc2ea | 146 | opt->repo = repo; |
7687a054 JH |
147 | opt->prefix = prefix; |
148 | opt->prefix_length = (prefix && *prefix) ? strlen(prefix) : 0; | |
149 | opt->pattern_tail = &opt->pattern_list; | |
150 | opt->header_tail = &opt->header_list; | |
7687a054 | 151 | } |
07a7d656 | 152 | |
8465541e | 153 | static void grep_set_pattern_type_option(enum grep_pattern_type pattern_type, struct grep_opt *opt) |
c5c31d33 | 154 | { |
07a3d411 ÆAB |
155 | /* |
156 | * When committing to the pattern type by setting the relevant | |
157 | * fields in grep_opt it's generally not necessary to zero out | |
158 | * the fields we're not choosing, since they won't have been | |
159 | * set by anything. The extended_regexp_option field is the | |
160 | * only exception to this. | |
161 | * | |
162 | * This is because in the process of parsing grep.patternType | |
163 | * & grep.extendedRegexp we set opt->pattern_type_option and | |
164 | * opt->extended_regexp_option, respectively. We then | |
165 | * internally use opt->extended_regexp_option to see if we're | |
166 | * compiling an ERE. It must be unset if that's not actually | |
167 | * the case. | |
168 | */ | |
169 | if (pattern_type != GREP_PATTERN_TYPE_ERE && | |
170 | opt->extended_regexp_option) | |
171 | opt->extended_regexp_option = 0; | |
172 | ||
c5c31d33 JH |
173 | switch (pattern_type) { |
174 | case GREP_PATTERN_TYPE_UNSPECIFIED: | |
175 | /* fall through */ | |
176 | ||
177 | case GREP_PATTERN_TYPE_BRE: | |
c5c31d33 JH |
178 | break; |
179 | ||
180 | case GREP_PATTERN_TYPE_ERE: | |
07a3d411 | 181 | opt->extended_regexp_option = 1; |
c5c31d33 JH |
182 | break; |
183 | ||
184 | case GREP_PATTERN_TYPE_FIXED: | |
185 | opt->fixed = 1; | |
c5c31d33 JH |
186 | break; |
187 | ||
188 | case GREP_PATTERN_TYPE_PCRE: | |
94da9193 | 189 | opt->pcre2 = 1; |
c5c31d33 JH |
190 | break; |
191 | } | |
192 | } | |
193 | ||
8465541e JH |
194 | void grep_commit_pattern_type(enum grep_pattern_type pattern_type, struct grep_opt *opt) |
195 | { | |
196 | if (pattern_type != GREP_PATTERN_TYPE_UNSPECIFIED) | |
197 | grep_set_pattern_type_option(pattern_type, opt); | |
198 | else if (opt->pattern_type_option != GREP_PATTERN_TYPE_UNSPECIFIED) | |
199 | grep_set_pattern_type_option(opt->pattern_type_option, opt); | |
200 | else if (opt->extended_regexp_option) | |
07a3d411 ÆAB |
201 | /* |
202 | * This branch *must* happen after setting from the | |
203 | * opt->pattern_type_option above, we don't want | |
204 | * grep.extendedRegexp to override grep.patternType! | |
205 | */ | |
8465541e JH |
206 | grep_set_pattern_type_option(GREP_PATTERN_TYPE_ERE, opt); |
207 | } | |
208 | ||
fc456751 RS |
209 | static struct grep_pat *create_grep_pat(const char *pat, size_t patlen, |
210 | const char *origin, int no, | |
211 | enum grep_pat_token t, | |
212 | enum grep_header_field field) | |
a4d7d2c6 JH |
213 | { |
214 | struct grep_pat *p = xcalloc(1, sizeof(*p)); | |
526a858a | 215 | p->pattern = xmemdupz(pat, patlen); |
fc456751 RS |
216 | p->patternlen = patlen; |
217 | p->origin = origin; | |
218 | p->no = no; | |
219 | p->token = t; | |
a4d7d2c6 | 220 | p->field = field; |
fc456751 RS |
221 | return p; |
222 | } | |
223 | ||
2b3873ff RS |
224 | static void do_append_grep_pat(struct grep_pat ***tail, struct grep_pat *p) |
225 | { | |
226 | **tail = p; | |
227 | *tail = &p->next; | |
a4d7d2c6 | 228 | p->next = NULL; |
526a858a RS |
229 | |
230 | switch (p->token) { | |
231 | case GREP_PATTERN: /* atom */ | |
232 | case GREP_PATTERN_HEAD: | |
233 | case GREP_PATTERN_BODY: | |
234 | for (;;) { | |
235 | struct grep_pat *new_pat; | |
236 | size_t len = 0; | |
237 | char *cp = p->pattern + p->patternlen, *nl = NULL; | |
238 | while (++len <= p->patternlen) { | |
239 | if (*(--cp) == '\n') { | |
240 | nl = cp; | |
241 | break; | |
242 | } | |
243 | } | |
244 | if (!nl) | |
245 | break; | |
246 | new_pat = create_grep_pat(nl + 1, len - 1, p->origin, | |
247 | p->no, p->token, p->field); | |
248 | new_pat->next = p->next; | |
249 | if (!p->next) | |
250 | *tail = &new_pat->next; | |
251 | p->next = new_pat; | |
252 | *nl = '\0'; | |
253 | p->patternlen -= len; | |
254 | } | |
255 | break; | |
256 | default: | |
257 | break; | |
258 | } | |
2b3873ff RS |
259 | } |
260 | ||
fc456751 RS |
261 | void append_header_grep_pattern(struct grep_opt *opt, |
262 | enum grep_header_field field, const char *pat) | |
263 | { | |
264 | struct grep_pat *p = create_grep_pat(pat, strlen(pat), "header", 0, | |
265 | GREP_PATTERN_HEAD, field); | |
baa6378f JH |
266 | if (field == GREP_HEADER_REFLOG) |
267 | opt->use_reflog_filter = 1; | |
2b3873ff | 268 | do_append_grep_pat(&opt->header_tail, p); |
a4d7d2c6 JH |
269 | } |
270 | ||
83b5d2f5 JH |
271 | void append_grep_pattern(struct grep_opt *opt, const char *pat, |
272 | const char *origin, int no, enum grep_pat_token t) | |
ed40a095 RS |
273 | { |
274 | append_grep_pat(opt, pat, strlen(pat), origin, no, t); | |
275 | } | |
276 | ||
277 | void append_grep_pat(struct grep_opt *opt, const char *pat, size_t patlen, | |
278 | const char *origin, int no, enum grep_pat_token t) | |
83b5d2f5 | 279 | { |
fc456751 | 280 | struct grep_pat *p = create_grep_pat(pat, patlen, origin, no, t, 0); |
2b3873ff | 281 | do_append_grep_pat(&opt->pattern_tail, p); |
83b5d2f5 JH |
282 | } |
283 | ||
5b594f45 FK |
284 | struct grep_opt *grep_opt_dup(const struct grep_opt *opt) |
285 | { | |
286 | struct grep_pat *pat; | |
287 | struct grep_opt *ret = xmalloc(sizeof(struct grep_opt)); | |
288 | *ret = *opt; | |
289 | ||
290 | ret->pattern_list = NULL; | |
291 | ret->pattern_tail = &ret->pattern_list; | |
292 | ||
293 | for(pat = opt->pattern_list; pat != NULL; pat = pat->next) | |
294 | { | |
295 | if(pat->token == GREP_PATTERN_HEAD) | |
296 | append_header_grep_pattern(ret, pat->field, | |
297 | pat->pattern); | |
298 | else | |
ed40a095 RS |
299 | append_grep_pat(ret, pat->pattern, pat->patternlen, |
300 | pat->origin, pat->no, pat->token); | |
5b594f45 FK |
301 | } |
302 | ||
303 | return ret; | |
304 | } | |
305 | ||
a30c148a MK |
306 | static NORETURN void compile_regexp_failed(const struct grep_pat *p, |
307 | const char *error) | |
308 | { | |
309 | char where[1024]; | |
310 | ||
311 | if (p->no) | |
19bdd3e7 | 312 | xsnprintf(where, sizeof(where), "In '%s' at %d, ", p->origin, p->no); |
a30c148a | 313 | else if (p->origin) |
19bdd3e7 | 314 | xsnprintf(where, sizeof(where), "%s, ", p->origin); |
a30c148a MK |
315 | else |
316 | where[0] = 0; | |
317 | ||
318 | die("%s'%s': %s", where, p->pattern, error); | |
319 | } | |
320 | ||
543f1c0c ÆAB |
321 | static int is_fixed(const char *s, size_t len) |
322 | { | |
323 | size_t i; | |
324 | ||
325 | for (i = 0; i < len; i++) { | |
326 | if (is_regex_special(s[i])) | |
327 | return 0; | |
328 | } | |
329 | ||
330 | return 1; | |
331 | } | |
332 | ||
94da9193 | 333 | #ifdef USE_LIBPCRE2 |
c1760352 ÆAB |
334 | #define GREP_PCRE2_DEBUG_MALLOC 0 |
335 | ||
336 | static void *pcre2_malloc(PCRE2_SIZE size, MAYBE_UNUSED void *memory_data) | |
337 | { | |
338 | void *pointer = malloc(size); | |
339 | #if GREP_PCRE2_DEBUG_MALLOC | |
340 | static int count = 1; | |
341 | fprintf(stderr, "PCRE2:%p -> #%02d: alloc(%lu)\n", pointer, count++, size); | |
342 | #endif | |
343 | return pointer; | |
344 | } | |
345 | ||
346 | static void pcre2_free(void *pointer, MAYBE_UNUSED void *memory_data) | |
347 | { | |
348 | #if GREP_PCRE2_DEBUG_MALLOC | |
349 | static int count = 1; | |
350 | if (pointer) | |
351 | fprintf(stderr, "PCRE2:%p -> #%02d: free()\n", pointer, count++); | |
352 | #endif | |
353 | free(pointer); | |
354 | } | |
355 | ||
94da9193 ÆAB |
356 | static void compile_pcre2_pattern(struct grep_pat *p, const struct grep_opt *opt) |
357 | { | |
358 | int error; | |
359 | PCRE2_UCHAR errbuf[256]; | |
360 | PCRE2_SIZE erroffset; | |
361 | int options = PCRE2_MULTILINE; | |
94da9193 | 362 | int jitret; |
a25b9085 ÆAB |
363 | int patinforet; |
364 | size_t jitsizearg; | |
94da9193 | 365 | |
cbe81e65 ÆAB |
366 | /* |
367 | * Call pcre2_general_context_create() before calling any | |
368 | * other pcre2_*(). It sets up our malloc()/free() functions | |
369 | * with which everything else is allocated. | |
370 | */ | |
371 | p->pcre2_general_context = pcre2_general_context_create( | |
372 | pcre2_malloc, pcre2_free, NULL); | |
373 | if (!p->pcre2_general_context) | |
374 | die("Couldn't allocate PCRE2 general context"); | |
94da9193 ÆAB |
375 | |
376 | if (opt->ignore_case) { | |
44570188 | 377 | if (!opt->ignore_locale && has_non_ascii(p->pattern)) { |
cbe81e65 ÆAB |
378 | p->pcre2_tables = pcre2_maketables(p->pcre2_general_context); |
379 | p->pcre2_compile_context = pcre2_compile_context_create(p->pcre2_general_context); | |
10da030a CMAB |
380 | pcre2_set_character_tables(p->pcre2_compile_context, |
381 | p->pcre2_tables); | |
94da9193 ÆAB |
382 | } |
383 | options |= PCRE2_CASELESS; | |
384 | } | |
870eea81 ÆAB |
385 | if (!opt->ignore_locale && is_utf8_locale() && has_non_ascii(p->pattern) && |
386 | !(!opt->ignore_case && (p->fixed || p->is_fixed))) | |
95ca1f98 ÆAB |
387 | options |= (PCRE2_UTF | PCRE2_MATCH_INVALID_UTF); |
388 | ||
797c3599 | 389 | #ifdef GIT_PCRE2_VERSION_10_36_OR_HIGHER |
95ca1f98 | 390 | /* Work around https://bugs.exim.org/show_bug.cgi?id=2642 fixed in 10.36 */ |
797c3599 ÆAB |
391 | if (PCRE2_MATCH_INVALID_UTF && options & (PCRE2_UTF | PCRE2_CASELESS)) |
392 | options |= PCRE2_NO_START_OPTIMIZE; | |
393 | #endif | |
94da9193 ÆAB |
394 | |
395 | p->pcre2_pattern = pcre2_compile((PCRE2_SPTR)p->pattern, | |
396 | p->patternlen, options, &error, &erroffset, | |
397 | p->pcre2_compile_context); | |
398 | ||
399 | if (p->pcre2_pattern) { | |
cbe81e65 | 400 | p->pcre2_match_data = pcre2_match_data_create_from_pattern(p->pcre2_pattern, p->pcre2_general_context); |
94da9193 ÆAB |
401 | if (!p->pcre2_match_data) |
402 | die("Couldn't allocate PCRE2 match data"); | |
403 | } else { | |
404 | pcre2_get_error_message(error, errbuf, sizeof(errbuf)); | |
405 | compile_regexp_failed(p, (const char *)&errbuf); | |
406 | } | |
407 | ||
408 | pcre2_config(PCRE2_CONFIG_JIT, &p->pcre2_jit_on); | |
04bef50c | 409 | if (p->pcre2_jit_on) { |
94da9193 ÆAB |
410 | jitret = pcre2_jit_compile(p->pcre2_pattern, PCRE2_JIT_COMPLETE); |
411 | if (jitret) | |
412 | die("Couldn't JIT the PCRE2 pattern '%s', got '%d'\n", p->pattern, jitret); | |
a25b9085 ÆAB |
413 | |
414 | /* | |
415 | * The pcre2_config(PCRE2_CONFIG_JIT, ...) call just | |
416 | * tells us whether the library itself supports JIT, | |
417 | * but to see whether we're going to be actually using | |
418 | * JIT we need to extract PCRE2_INFO_JITSIZE from the | |
419 | * pattern *after* we do pcre2_jit_compile() above. | |
420 | * | |
421 | * This is because if the pattern contains the | |
422 | * (*NO_JIT) verb (see pcre2syntax(3)) | |
423 | * pcre2_jit_compile() will exit early with 0. If we | |
424 | * then proceed to call pcre2_jit_match() further down | |
425 | * the line instead of pcre2_match() we'll either | |
426 | * segfault (pre PCRE 10.31) or run into a fatal error | |
427 | * (post PCRE2 10.31) | |
428 | */ | |
429 | patinforet = pcre2_pattern_info(p->pcre2_pattern, PCRE2_INFO_JITSIZE, &jitsizearg); | |
430 | if (patinforet) | |
431 | BUG("pcre2_pattern_info() failed: %d", patinforet); | |
432 | if (jitsizearg == 0) { | |
433 | p->pcre2_jit_on = 0; | |
434 | return; | |
435 | } | |
94da9193 ÆAB |
436 | } |
437 | } | |
438 | ||
439 | static int pcre2match(struct grep_pat *p, const char *line, const char *eol, | |
440 | regmatch_t *match, int eflags) | |
441 | { | |
442 | int ret, flags = 0; | |
443 | PCRE2_SIZE *ovector; | |
444 | PCRE2_UCHAR errbuf[256]; | |
445 | ||
446 | if (eflags & REG_NOTBOL) | |
447 | flags |= PCRE2_NOTBOL; | |
448 | ||
449 | if (p->pcre2_jit_on) | |
450 | ret = pcre2_jit_match(p->pcre2_pattern, (unsigned char *)line, | |
451 | eol - line, 0, flags, p->pcre2_match_data, | |
452 | NULL); | |
453 | else | |
454 | ret = pcre2_match(p->pcre2_pattern, (unsigned char *)line, | |
455 | eol - line, 0, flags, p->pcre2_match_data, | |
456 | NULL); | |
457 | ||
458 | if (ret < 0 && ret != PCRE2_ERROR_NOMATCH) { | |
459 | pcre2_get_error_message(ret, errbuf, sizeof(errbuf)); | |
460 | die("%s failed with error code %d: %s", | |
461 | (p->pcre2_jit_on ? "pcre2_jit_match" : "pcre2_match"), ret, | |
462 | errbuf); | |
463 | } | |
464 | if (ret > 0) { | |
465 | ovector = pcre2_get_ovector_pointer(p->pcre2_match_data); | |
466 | ret = 0; | |
467 | match->rm_so = (int)ovector[0]; | |
468 | match->rm_eo = (int)ovector[1]; | |
469 | } | |
470 | ||
471 | return ret; | |
472 | } | |
473 | ||
474 | static void free_pcre2_pattern(struct grep_pat *p) | |
475 | { | |
476 | pcre2_compile_context_free(p->pcre2_compile_context); | |
477 | pcre2_code_free(p->pcre2_pattern); | |
478 | pcre2_match_data_free(p->pcre2_match_data); | |
b76bf27f | 479 | #ifdef GIT_PCRE2_VERSION_10_34_OR_HIGHER |
cbe81e65 | 480 | pcre2_maketables_free(p->pcre2_general_context, p->pcre2_tables); |
b76bf27f | 481 | #else |
10da030a | 482 | free((void *)p->pcre2_tables); |
b76bf27f | 483 | #endif |
cbe81e65 | 484 | pcre2_general_context_free(p->pcre2_general_context); |
94da9193 ÆAB |
485 | } |
486 | #else /* !USE_LIBPCRE2 */ | |
487 | static void compile_pcre2_pattern(struct grep_pat *p, const struct grep_opt *opt) | |
488 | { | |
94da9193 ÆAB |
489 | die("cannot use Perl-compatible regexes when not compiled with USE_LIBPCRE"); |
490 | } | |
491 | ||
492 | static int pcre2match(struct grep_pat *p, const char *line, const char *eol, | |
493 | regmatch_t *match, int eflags) | |
494 | { | |
495 | return 1; | |
496 | } | |
497 | ||
498 | static void free_pcre2_pattern(struct grep_pat *p) | |
499 | { | |
500 | } | |
94da9193 | 501 | |
793dc676 NTND |
502 | static void compile_fixed_regexp(struct grep_pat *p, struct grep_opt *opt) |
503 | { | |
504 | struct strbuf sb = STRBUF_INIT; | |
505 | int err; | |
1ceababc | 506 | int regflags = 0; |
793dc676 NTND |
507 | |
508 | basic_regex_quote_buf(&sb, p->pattern); | |
793dc676 NTND |
509 | if (opt->ignore_case) |
510 | regflags |= REG_ICASE; | |
511 | err = regcomp(&p->regexp, sb.buf, regflags); | |
793dc676 NTND |
512 | strbuf_release(&sb); |
513 | if (err) { | |
514 | char errbuf[1024]; | |
515 | regerror(err, &p->regexp, errbuf, sizeof(errbuf)); | |
793dc676 NTND |
516 | compile_regexp_failed(p, errbuf); |
517 | } | |
518 | } | |
b65abcaf | 519 | #endif /* !USE_LIBPCRE2 */ |
793dc676 | 520 | |
83b5d2f5 JH |
521 | static void compile_regexp(struct grep_pat *p, struct grep_opt *opt) |
522 | { | |
c822255c | 523 | int err; |
07a3d411 | 524 | int regflags = REG_NEWLINE; |
c822255c | 525 | |
d7eb527d | 526 | p->word_regexp = opt->word_regexp; |
5183bf67 | 527 | p->ignore_case = opt->ignore_case; |
48de2a76 | 528 | p->fixed = opt->fixed; |
d7eb527d | 529 | |
45d1f37c ÆAB |
530 | if (memchr(p->pattern, 0, p->patternlen) && !opt->pcre2) |
531 | die(_("given pattern contains NULL byte (via -f <file>). This is only supported with -P under PCRE v2")); | |
532 | ||
09872f64 | 533 | p->is_fixed = is_fixed(p->pattern, p->patternlen); |
8a599983 ÆAB |
534 | #ifdef USE_LIBPCRE2 |
535 | if (!p->fixed && !p->is_fixed) { | |
536 | const char *no_jit = "(*NO_JIT)"; | |
537 | const int no_jit_len = strlen(no_jit); | |
538 | if (starts_with(p->pattern, no_jit) && | |
539 | is_fixed(p->pattern + no_jit_len, | |
540 | p->patternlen - no_jit_len)) | |
541 | p->is_fixed = 1; | |
542 | } | |
543 | #endif | |
09872f64 | 544 | if (p->fixed || p->is_fixed) { |
b65abcaf | 545 | #ifdef USE_LIBPCRE2 |
09872f64 | 546 | if (p->is_fixed) { |
b65abcaf ÆAB |
547 | compile_pcre2_pattern(p, opt); |
548 | } else { | |
549 | /* | |
550 | * E.g. t7811-grep-open.sh relies on the | |
551 | * pattern being restored. | |
552 | */ | |
553 | char *old_pattern = p->pattern; | |
554 | size_t old_patternlen = p->patternlen; | |
555 | struct strbuf sb = STRBUF_INIT; | |
556 | ||
557 | /* | |
558 | * There is the PCRE2_LITERAL flag, but it's | |
559 | * only in PCRE v2 10.30 and later. Needing to | |
560 | * ifdef our way around that and dealing with | |
561 | * it + PCRE2_MULTILINE being an error is more | |
562 | * complex than just quoting this ourselves. | |
563 | */ | |
564 | strbuf_add(&sb, "\\Q", 2); | |
565 | strbuf_add(&sb, p->pattern, p->patternlen); | |
566 | strbuf_add(&sb, "\\E", 2); | |
567 | ||
568 | p->pattern = sb.buf; | |
569 | p->patternlen = sb.len; | |
570 | compile_pcre2_pattern(p, opt); | |
571 | p->pattern = old_pattern; | |
572 | p->patternlen = old_patternlen; | |
573 | strbuf_release(&sb); | |
574 | } | |
575 | #else /* !USE_LIBPCRE2 */ | |
793dc676 | 576 | compile_fixed_regexp(p, opt); |
b65abcaf | 577 | #endif /* !USE_LIBPCRE2 */ |
793dc676 | 578 | return; |
9eceddee | 579 | } |
c822255c | 580 | |
94da9193 ÆAB |
581 | if (opt->pcre2) { |
582 | compile_pcre2_pattern(p, opt); | |
583 | return; | |
584 | } | |
585 | ||
07a3d411 ÆAB |
586 | if (p->ignore_case) |
587 | regflags |= REG_ICASE; | |
588 | if (opt->extended_regexp_option) | |
589 | regflags |= REG_EXTENDED; | |
590 | err = regcomp(&p->regexp, p->pattern, regflags); | |
83b5d2f5 JH |
591 | if (err) { |
592 | char errbuf[1024]; | |
83b5d2f5 | 593 | regerror(err, &p->regexp, errbuf, 1024); |
a30c148a | 594 | compile_regexp_failed(p, errbuf); |
83b5d2f5 JH |
595 | } |
596 | } | |
597 | ||
0ab7befa | 598 | static struct grep_expr *compile_pattern_or(struct grep_pat **); |
83b5d2f5 JH |
599 | static struct grep_expr *compile_pattern_atom(struct grep_pat **list) |
600 | { | |
601 | struct grep_pat *p; | |
602 | struct grep_expr *x; | |
603 | ||
604 | p = *list; | |
c922b01f LT |
605 | if (!p) |
606 | return NULL; | |
83b5d2f5 JH |
607 | switch (p->token) { |
608 | case GREP_PATTERN: /* atom */ | |
480c1ca6 JH |
609 | case GREP_PATTERN_HEAD: |
610 | case GREP_PATTERN_BODY: | |
ca56dadb | 611 | CALLOC_ARRAY(x, 1); |
83b5d2f5 JH |
612 | x->node = GREP_NODE_ATOM; |
613 | x->u.atom = p; | |
614 | *list = p->next; | |
615 | return x; | |
616 | case GREP_OPEN_PAREN: | |
617 | *list = p->next; | |
0ab7befa | 618 | x = compile_pattern_or(list); |
83b5d2f5 JH |
619 | if (!*list || (*list)->token != GREP_CLOSE_PAREN) |
620 | die("unmatched parenthesis"); | |
621 | *list = (*list)->next; | |
622 | return x; | |
623 | default: | |
624 | return NULL; | |
625 | } | |
626 | } | |
627 | ||
628 | static struct grep_expr *compile_pattern_not(struct grep_pat **list) | |
629 | { | |
630 | struct grep_pat *p; | |
631 | struct grep_expr *x; | |
632 | ||
633 | p = *list; | |
c922b01f LT |
634 | if (!p) |
635 | return NULL; | |
83b5d2f5 JH |
636 | switch (p->token) { |
637 | case GREP_NOT: | |
638 | if (!p->next) | |
639 | die("--not not followed by pattern expression"); | |
640 | *list = p->next; | |
ca56dadb | 641 | CALLOC_ARRAY(x, 1); |
83b5d2f5 JH |
642 | x->node = GREP_NODE_NOT; |
643 | x->u.unary = compile_pattern_not(list); | |
644 | if (!x->u.unary) | |
645 | die("--not followed by non pattern expression"); | |
646 | return x; | |
647 | default: | |
648 | return compile_pattern_atom(list); | |
649 | } | |
650 | } | |
651 | ||
652 | static struct grep_expr *compile_pattern_and(struct grep_pat **list) | |
653 | { | |
654 | struct grep_pat *p; | |
655 | struct grep_expr *x, *y, *z; | |
656 | ||
657 | x = compile_pattern_not(list); | |
658 | p = *list; | |
659 | if (p && p->token == GREP_AND) { | |
fe7fe62d RS |
660 | if (!x) |
661 | die("--and not preceded by pattern expression"); | |
83b5d2f5 JH |
662 | if (!p->next) |
663 | die("--and not followed by pattern expression"); | |
664 | *list = p->next; | |
665 | y = compile_pattern_and(list); | |
666 | if (!y) | |
667 | die("--and not followed by pattern expression"); | |
ca56dadb | 668 | CALLOC_ARRAY(z, 1); |
83b5d2f5 JH |
669 | z->node = GREP_NODE_AND; |
670 | z->u.binary.left = x; | |
671 | z->u.binary.right = y; | |
672 | return z; | |
673 | } | |
674 | return x; | |
675 | } | |
676 | ||
677 | static struct grep_expr *compile_pattern_or(struct grep_pat **list) | |
678 | { | |
679 | struct grep_pat *p; | |
680 | struct grep_expr *x, *y, *z; | |
681 | ||
682 | x = compile_pattern_and(list); | |
683 | p = *list; | |
684 | if (x && p && p->token != GREP_CLOSE_PAREN) { | |
685 | y = compile_pattern_or(list); | |
686 | if (!y) | |
687 | die("not a pattern expression %s", p->pattern); | |
ca56dadb | 688 | CALLOC_ARRAY(z, 1); |
83b5d2f5 JH |
689 | z->node = GREP_NODE_OR; |
690 | z->u.binary.left = x; | |
691 | z->u.binary.right = y; | |
692 | return z; | |
693 | } | |
694 | return x; | |
695 | } | |
696 | ||
697 | static struct grep_expr *compile_pattern_expr(struct grep_pat **list) | |
698 | { | |
699 | return compile_pattern_or(list); | |
700 | } | |
701 | ||
5aaeb733 JH |
702 | static struct grep_expr *grep_true_expr(void) |
703 | { | |
704 | struct grep_expr *z = xcalloc(1, sizeof(*z)); | |
705 | z->node = GREP_NODE_TRUE; | |
706 | return z; | |
707 | } | |
708 | ||
709 | static struct grep_expr *grep_or_expr(struct grep_expr *left, struct grep_expr *right) | |
710 | { | |
711 | struct grep_expr *z = xcalloc(1, sizeof(*z)); | |
712 | z->node = GREP_NODE_OR; | |
713 | z->u.binary.left = left; | |
714 | z->u.binary.right = right; | |
715 | return z; | |
716 | } | |
717 | ||
95ce9ce2 | 718 | static struct grep_expr *prep_header_patterns(struct grep_opt *opt) |
83b5d2f5 JH |
719 | { |
720 | struct grep_pat *p; | |
95ce9ce2 | 721 | struct grep_expr *header_expr; |
5aaeb733 JH |
722 | struct grep_expr *(header_group[GREP_HEADER_FIELD_MAX]); |
723 | enum grep_header_field fld; | |
83b5d2f5 | 724 | |
95ce9ce2 JH |
725 | if (!opt->header_list) |
726 | return NULL; | |
2385f246 | 727 | |
95ce9ce2 JH |
728 | for (p = opt->header_list; p; p = p->next) { |
729 | if (p->token != GREP_PATTERN_HEAD) | |
033abf97 | 730 | BUG("a non-header pattern in grep header list."); |
3ce3ffb8 AP |
731 | if (p->field < GREP_HEADER_FIELD_MIN || |
732 | GREP_HEADER_FIELD_MAX <= p->field) | |
033abf97 | 733 | BUG("unknown header field %d", p->field); |
95ce9ce2 | 734 | compile_regexp(p, opt); |
80235ba7 | 735 | } |
5aaeb733 JH |
736 | |
737 | for (fld = 0; fld < GREP_HEADER_FIELD_MAX; fld++) | |
738 | header_group[fld] = NULL; | |
739 | ||
740 | for (p = opt->header_list; p; p = p->next) { | |
741 | struct grep_expr *h; | |
742 | struct grep_pat *pp = p; | |
743 | ||
744 | h = compile_pattern_atom(&pp); | |
745 | if (!h || pp != p->next) | |
033abf97 | 746 | BUG("malformed header expr"); |
5aaeb733 JH |
747 | if (!header_group[p->field]) { |
748 | header_group[p->field] = h; | |
749 | continue; | |
750 | } | |
751 | header_group[p->field] = grep_or_expr(h, header_group[p->field]); | |
752 | } | |
753 | ||
754 | header_expr = NULL; | |
755 | ||
756 | for (fld = 0; fld < GREP_HEADER_FIELD_MAX; fld++) { | |
757 | if (!header_group[fld]) | |
758 | continue; | |
759 | if (!header_expr) | |
760 | header_expr = grep_true_expr(); | |
761 | header_expr = grep_or_expr(header_group[fld], header_expr); | |
762 | } | |
95ce9ce2 JH |
763 | return header_expr; |
764 | } | |
765 | ||
13e4fc7e JH |
766 | static struct grep_expr *grep_splice_or(struct grep_expr *x, struct grep_expr *y) |
767 | { | |
768 | struct grep_expr *z = x; | |
769 | ||
770 | while (x) { | |
771 | assert(x->node == GREP_NODE_OR); | |
772 | if (x->u.binary.right && | |
773 | x->u.binary.right->node == GREP_NODE_TRUE) { | |
774 | x->u.binary.right = y; | |
775 | break; | |
776 | } | |
777 | x = x->u.binary.right; | |
778 | } | |
779 | return z; | |
780 | } | |
781 | ||
15c96497 | 782 | void compile_grep_patterns(struct grep_opt *opt) |
95ce9ce2 JH |
783 | { |
784 | struct grep_pat *p; | |
785 | struct grep_expr *header_expr = prep_header_patterns(opt); | |
0ab7befa | 786 | |
83b5d2f5 | 787 | for (p = opt->pattern_list; p; p = p->next) { |
480c1ca6 JH |
788 | switch (p->token) { |
789 | case GREP_PATTERN: /* atom */ | |
790 | case GREP_PATTERN_HEAD: | |
791 | case GREP_PATTERN_BODY: | |
c822255c | 792 | compile_regexp(p, opt); |
480c1ca6 JH |
793 | break; |
794 | default: | |
83b5d2f5 | 795 | opt->extended = 1; |
480c1ca6 JH |
796 | break; |
797 | } | |
83b5d2f5 JH |
798 | } |
799 | ||
80235ba7 JH |
800 | if (opt->all_match || header_expr) |
801 | opt->extended = 1; | |
15c96497 | 802 | else if (!opt->extended) |
83b5d2f5 JH |
803 | return; |
804 | ||
83b5d2f5 | 805 | p = opt->pattern_list; |
ba150a3f MB |
806 | if (p) |
807 | opt->pattern_expression = compile_pattern_expr(&p); | |
83b5d2f5 JH |
808 | if (p) |
809 | die("incomplete pattern expression: %s", p->pattern); | |
80235ba7 JH |
810 | |
811 | if (!header_expr) | |
812 | return; | |
813 | ||
5aaeb733 | 814 | if (!opt->pattern_expression) |
80235ba7 | 815 | opt->pattern_expression = header_expr; |
13e4fc7e JH |
816 | else if (opt->all_match) |
817 | opt->pattern_expression = grep_splice_or(header_expr, | |
818 | opt->pattern_expression); | |
5aaeb733 JH |
819 | else |
820 | opt->pattern_expression = grep_or_expr(opt->pattern_expression, | |
821 | header_expr); | |
80235ba7 | 822 | opt->all_match = 1; |
83b5d2f5 JH |
823 | } |
824 | ||
b48fb5b6 JH |
825 | static void free_pattern_expr(struct grep_expr *x) |
826 | { | |
827 | switch (x->node) { | |
5aaeb733 | 828 | case GREP_NODE_TRUE: |
b48fb5b6 JH |
829 | case GREP_NODE_ATOM: |
830 | break; | |
831 | case GREP_NODE_NOT: | |
832 | free_pattern_expr(x->u.unary); | |
833 | break; | |
834 | case GREP_NODE_AND: | |
835 | case GREP_NODE_OR: | |
836 | free_pattern_expr(x->u.binary.left); | |
837 | free_pattern_expr(x->u.binary.right); | |
838 | break; | |
839 | } | |
840 | free(x); | |
841 | } | |
842 | ||
843 | void free_grep_patterns(struct grep_opt *opt) | |
844 | { | |
845 | struct grep_pat *p, *n; | |
846 | ||
847 | for (p = opt->pattern_list; p; p = n) { | |
848 | n = p->next; | |
849 | switch (p->token) { | |
850 | case GREP_PATTERN: /* atom */ | |
851 | case GREP_PATTERN_HEAD: | |
852 | case GREP_PATTERN_BODY: | |
7599730b | 853 | if (p->pcre2_pattern) |
94da9193 | 854 | free_pcre2_pattern(p); |
63e7e9d8 MK |
855 | else |
856 | regfree(&p->regexp); | |
526a858a | 857 | free(p->pattern); |
b48fb5b6 JH |
858 | break; |
859 | default: | |
860 | break; | |
861 | } | |
862 | free(p); | |
863 | } | |
864 | ||
865 | if (!opt->extended) | |
866 | return; | |
867 | free_pattern_expr(opt->pattern_expression); | |
868 | } | |
869 | ||
83b5d2f5 JH |
870 | static char *end_of_line(char *cp, unsigned long *left) |
871 | { | |
872 | unsigned long l = *left; | |
873 | while (l && *cp != '\n') { | |
874 | l--; | |
875 | cp++; | |
876 | } | |
877 | *left = l; | |
878 | return cp; | |
879 | } | |
880 | ||
881 | static int word_char(char ch) | |
882 | { | |
883 | return isalnum(ch) || ch == '_'; | |
884 | } | |
885 | ||
55f638bd ML |
886 | static void output_color(struct grep_opt *opt, const void *data, size_t size, |
887 | const char *color) | |
888 | { | |
daa0c3d9 | 889 | if (want_color(opt->color) && color && color[0]) { |
55f638bd ML |
890 | opt->output(opt, color, strlen(color)); |
891 | opt->output(opt, data, size); | |
892 | opt->output(opt, GIT_COLOR_RESET, strlen(GIT_COLOR_RESET)); | |
893 | } else | |
894 | opt->output(opt, data, size); | |
895 | } | |
896 | ||
897 | static void output_sep(struct grep_opt *opt, char sign) | |
898 | { | |
899 | if (opt->null_following_name) | |
900 | opt->output(opt, "\0", 1); | |
901 | else | |
fa151dc5 | 902 | output_color(opt, &sign, 1, opt->colors[GREP_COLOR_SEP]); |
55f638bd ML |
903 | } |
904 | ||
83caecca RZ |
905 | static void show_name(struct grep_opt *opt, const char *name) |
906 | { | |
fa151dc5 | 907 | output_color(opt, name, strlen(name), opt->colors[GREP_COLOR_FILENAME]); |
5b594f45 | 908 | opt->output(opt, opt->null_following_name ? "\0" : "\n", 1); |
83caecca RZ |
909 | } |
910 | ||
97e77784 MK |
911 | static int patmatch(struct grep_pat *p, char *line, char *eol, |
912 | regmatch_t *match, int eflags) | |
913 | { | |
914 | int hit; | |
915 | ||
7599730b | 916 | if (p->pcre2_pattern) |
94da9193 | 917 | hit = !pcre2match(p, line, eol, match, eflags); |
97e77784 | 918 | else |
b7d36ffc JS |
919 | hit = !regexec_buf(&p->regexp, line, eol - line, 1, match, |
920 | eflags); | |
97e77784 MK |
921 | |
922 | return hit; | |
923 | } | |
924 | ||
a4d7d2c6 JH |
925 | static int strip_timestamp(char *bol, char **eol_p) |
926 | { | |
927 | char *eol = *eol_p; | |
928 | int ch; | |
929 | ||
930 | while (bol < --eol) { | |
931 | if (*eol != '>') | |
932 | continue; | |
933 | *eol_p = ++eol; | |
934 | ch = *eol; | |
935 | *eol = '\0'; | |
936 | return ch; | |
937 | } | |
938 | return 0; | |
939 | } | |
940 | ||
941 | static struct { | |
942 | const char *field; | |
943 | size_t len; | |
944 | } header_field[] = { | |
945 | { "author ", 7 }, | |
946 | { "committer ", 10 }, | |
72fd13f7 | 947 | { "reflog ", 7 }, |
a4d7d2c6 JH |
948 | }; |
949 | ||
d7eb527d | 950 | static int match_one_pattern(struct grep_pat *p, char *bol, char *eol, |
79212772 RS |
951 | enum grep_context ctx, |
952 | regmatch_t *pmatch, int eflags) | |
83b5d2f5 JH |
953 | { |
954 | int hit = 0; | |
a4d7d2c6 | 955 | int saved_ch = 0; |
e701fadb | 956 | const char *start = bol; |
83b5d2f5 | 957 | |
480c1ca6 JH |
958 | if ((p->token != GREP_PATTERN) && |
959 | ((p->token == GREP_PATTERN_HEAD) != (ctx == GREP_CONTEXT_HEAD))) | |
960 | return 0; | |
961 | ||
a4d7d2c6 JH |
962 | if (p->token == GREP_PATTERN_HEAD) { |
963 | const char *field; | |
964 | size_t len; | |
965 | assert(p->field < ARRAY_SIZE(header_field)); | |
966 | field = header_field[p->field].field; | |
967 | len = header_field[p->field].len; | |
968 | if (strncmp(bol, field, len)) | |
969 | return 0; | |
970 | bol += len; | |
ad4813b3 NTND |
971 | switch (p->field) { |
972 | case GREP_HEADER_AUTHOR: | |
973 | case GREP_HEADER_COMMITTER: | |
974 | saved_ch = strip_timestamp(bol, &eol); | |
975 | break; | |
976 | default: | |
977 | break; | |
978 | } | |
a4d7d2c6 JH |
979 | } |
980 | ||
83b5d2f5 | 981 | again: |
97e77784 | 982 | hit = patmatch(p, bol, eol, pmatch, eflags); |
83b5d2f5 | 983 | |
d7eb527d | 984 | if (hit && p->word_regexp) { |
83b5d2f5 | 985 | if ((pmatch[0].rm_so < 0) || |
84201eae | 986 | (eol - bol) < pmatch[0].rm_so || |
83b5d2f5 JH |
987 | (pmatch[0].rm_eo < 0) || |
988 | (eol - bol) < pmatch[0].rm_eo) | |
989 | die("regexp returned nonsense"); | |
990 | ||
991 | /* Match beginning must be either beginning of the | |
992 | * line, or at word boundary (i.e. the last char must | |
993 | * not be a word char). Similarly, match end must be | |
994 | * either end of the line, or at word boundary | |
995 | * (i.e. the next char must not be a word char). | |
996 | */ | |
fb62eb7f | 997 | if ( ((pmatch[0].rm_so == 0) || |
83b5d2f5 JH |
998 | !word_char(bol[pmatch[0].rm_so-1])) && |
999 | ((pmatch[0].rm_eo == (eol-bol)) || | |
1000 | !word_char(bol[pmatch[0].rm_eo])) ) | |
1001 | ; | |
1002 | else | |
1003 | hit = 0; | |
1004 | ||
84201eae RS |
1005 | /* Words consist of at least one character. */ |
1006 | if (pmatch->rm_so == pmatch->rm_eo) | |
1007 | hit = 0; | |
1008 | ||
83b5d2f5 JH |
1009 | if (!hit && pmatch[0].rm_so + bol + 1 < eol) { |
1010 | /* There could be more than one match on the | |
1011 | * line, and the first match might not be | |
1012 | * strict word match. But later ones could be! | |
fb62eb7f RS |
1013 | * Forward to the next possible start, i.e. the |
1014 | * next position following a non-word char. | |
83b5d2f5 JH |
1015 | */ |
1016 | bol = pmatch[0].rm_so + bol + 1; | |
fb62eb7f RS |
1017 | while (word_char(bol[-1]) && bol < eol) |
1018 | bol++; | |
dbb6a4ad | 1019 | eflags |= REG_NOTBOL; |
fb62eb7f RS |
1020 | if (bol < eol) |
1021 | goto again; | |
83b5d2f5 JH |
1022 | } |
1023 | } | |
a4d7d2c6 JH |
1024 | if (p->token == GREP_PATTERN_HEAD && saved_ch) |
1025 | *eol = saved_ch; | |
e701fadb RS |
1026 | if (hit) { |
1027 | pmatch[0].rm_so += bol - start; | |
1028 | pmatch[0].rm_eo += bol - start; | |
1029 | } | |
83b5d2f5 JH |
1030 | return hit; |
1031 | } | |
1032 | ||
68d686e6 TB |
1033 | static int match_expr_eval(struct grep_opt *opt, struct grep_expr *x, char *bol, |
1034 | char *eol, enum grep_context ctx, ssize_t *col, | |
1035 | ssize_t *icol, int collect_hits) | |
83b5d2f5 | 1036 | { |
0ab7befa JH |
1037 | int h = 0; |
1038 | ||
c922b01f LT |
1039 | if (!x) |
1040 | die("Not a valid grep expression"); | |
83b5d2f5 | 1041 | switch (x->node) { |
5aaeb733 JH |
1042 | case GREP_NODE_TRUE: |
1043 | h = 1; | |
1044 | break; | |
83b5d2f5 | 1045 | case GREP_NODE_ATOM: |
68d686e6 TB |
1046 | { |
1047 | regmatch_t tmp; | |
1048 | h = match_one_pattern(x->u.atom, bol, eol, ctx, | |
1049 | &tmp, 0); | |
1050 | if (h && (*col < 0 || tmp.rm_so < *col)) | |
1051 | *col = tmp.rm_so; | |
1052 | } | |
83b5d2f5 JH |
1053 | break; |
1054 | case GREP_NODE_NOT: | |
68d686e6 TB |
1055 | /* |
1056 | * Upon visiting a GREP_NODE_NOT, col and icol become swapped. | |
1057 | */ | |
1058 | h = !match_expr_eval(opt, x->u.unary, bol, eol, ctx, icol, col, | |
1059 | 0); | |
0ab7befa | 1060 | break; |
83b5d2f5 | 1061 | case GREP_NODE_AND: |
017c0fcf | 1062 | h = match_expr_eval(opt, x->u.binary.left, bol, eol, ctx, col, |
68d686e6 | 1063 | icol, 0); |
017c0fcf TB |
1064 | if (h || opt->columnnum) { |
1065 | /* | |
1066 | * Don't short-circuit AND when given --column, since a | |
1067 | * NOT earlier in the tree may turn this into an OR. In | |
1068 | * this case, see the below comment. | |
1069 | */ | |
1070 | h &= match_expr_eval(opt, x->u.binary.right, bol, eol, | |
1071 | ctx, col, icol, 0); | |
1072 | } | |
0ab7befa | 1073 | break; |
83b5d2f5 | 1074 | case GREP_NODE_OR: |
017c0fcf TB |
1075 | if (!(collect_hits || opt->columnnum)) { |
1076 | /* | |
1077 | * Don't short-circuit OR when given --column (or | |
1078 | * collecting hits) to ensure we don't skip a later | |
1079 | * child that would produce an earlier match. | |
1080 | */ | |
68d686e6 TB |
1081 | return (match_expr_eval(opt, x->u.binary.left, bol, eol, |
1082 | ctx, col, icol, 0) || | |
1083 | match_expr_eval(opt, x->u.binary.right, bol, | |
1084 | eol, ctx, col, icol, 0)); | |
017c0fcf | 1085 | } |
68d686e6 TB |
1086 | h = match_expr_eval(opt, x->u.binary.left, bol, eol, ctx, col, |
1087 | icol, 0); | |
017c0fcf TB |
1088 | if (collect_hits) |
1089 | x->u.binary.left->hit |= h; | |
68d686e6 | 1090 | h |= match_expr_eval(opt, x->u.binary.right, bol, eol, ctx, col, |
017c0fcf | 1091 | icol, collect_hits); |
0ab7befa JH |
1092 | break; |
1093 | default: | |
d7530708 | 1094 | die("Unexpected node type (internal error) %d", x->node); |
83b5d2f5 | 1095 | } |
0ab7befa JH |
1096 | if (collect_hits) |
1097 | x->hit |= h; | |
1098 | return h; | |
83b5d2f5 JH |
1099 | } |
1100 | ||
480c1ca6 | 1101 | static int match_expr(struct grep_opt *opt, char *bol, char *eol, |
68d686e6 TB |
1102 | enum grep_context ctx, ssize_t *col, |
1103 | ssize_t *icol, int collect_hits) | |
83b5d2f5 JH |
1104 | { |
1105 | struct grep_expr *x = opt->pattern_expression; | |
68d686e6 | 1106 | return match_expr_eval(opt, x, bol, eol, ctx, col, icol, collect_hits); |
83b5d2f5 JH |
1107 | } |
1108 | ||
480c1ca6 | 1109 | static int match_line(struct grep_opt *opt, char *bol, char *eol, |
68d686e6 | 1110 | ssize_t *col, ssize_t *icol, |
0ab7befa | 1111 | enum grep_context ctx, int collect_hits) |
83b5d2f5 JH |
1112 | { |
1113 | struct grep_pat *p; | |
017c0fcf | 1114 | int hit = 0; |
79212772 | 1115 | |
83b5d2f5 | 1116 | if (opt->extended) |
68d686e6 TB |
1117 | return match_expr(opt, bol, eol, ctx, col, icol, |
1118 | collect_hits); | |
0ab7befa JH |
1119 | |
1120 | /* we do not call with collect_hits without being extended */ | |
83b5d2f5 | 1121 | for (p = opt->pattern_list; p; p = p->next) { |
68d686e6 TB |
1122 | regmatch_t tmp; |
1123 | if (match_one_pattern(p, bol, eol, ctx, &tmp, 0)) { | |
017c0fcf TB |
1124 | hit |= 1; |
1125 | if (!opt->columnnum) { | |
1126 | /* | |
1127 | * Without --column, any single match on a line | |
1128 | * is enough to know that it needs to be | |
1129 | * printed. With --column, scan _all_ patterns | |
1130 | * to find the earliest. | |
1131 | */ | |
1132 | break; | |
1133 | } | |
1134 | if (*col < 0 || tmp.rm_so < *col) | |
1135 | *col = tmp.rm_so; | |
68d686e6 | 1136 | } |
83b5d2f5 | 1137 | } |
017c0fcf | 1138 | return hit; |
83b5d2f5 JH |
1139 | } |
1140 | ||
7e8f59d5 RS |
1141 | static int match_next_pattern(struct grep_pat *p, char *bol, char *eol, |
1142 | enum grep_context ctx, | |
1143 | regmatch_t *pmatch, int eflags) | |
1144 | { | |
1145 | regmatch_t match; | |
1146 | ||
1147 | if (!match_one_pattern(p, bol, eol, ctx, &match, eflags)) | |
1148 | return 0; | |
1149 | if (match.rm_so < 0 || match.rm_eo < 0) | |
1150 | return 0; | |
1151 | if (pmatch->rm_so >= 0 && pmatch->rm_eo >= 0) { | |
1152 | if (match.rm_so > pmatch->rm_so) | |
1153 | return 1; | |
1154 | if (match.rm_so == pmatch->rm_so && match.rm_eo < pmatch->rm_eo) | |
1155 | return 1; | |
1156 | } | |
1157 | pmatch->rm_so = match.rm_so; | |
1158 | pmatch->rm_eo = match.rm_eo; | |
1159 | return 1; | |
1160 | } | |
1161 | ||
1162 | static int next_match(struct grep_opt *opt, char *bol, char *eol, | |
1163 | enum grep_context ctx, regmatch_t *pmatch, int eflags) | |
1164 | { | |
1165 | struct grep_pat *p; | |
1166 | int hit = 0; | |
1167 | ||
1168 | pmatch->rm_so = pmatch->rm_eo = -1; | |
1169 | if (bol < eol) { | |
1170 | for (p = opt->pattern_list; p; p = p->next) { | |
1171 | switch (p->token) { | |
1172 | case GREP_PATTERN: /* atom */ | |
1173 | case GREP_PATTERN_HEAD: | |
1174 | case GREP_PATTERN_BODY: | |
1175 | hit |= match_next_pattern(p, bol, eol, ctx, | |
1176 | pmatch, eflags); | |
1177 | break; | |
1178 | default: | |
1179 | break; | |
1180 | } | |
1181 | } | |
1182 | } | |
1183 | return hit; | |
1184 | } | |
1185 | ||
c707ded3 TB |
1186 | static void show_line_header(struct grep_opt *opt, const char *name, |
1187 | unsigned lno, ssize_t cno, char sign) | |
7e8f59d5 | 1188 | { |
1d84f72e | 1189 | if (opt->heading && opt->last_shown == 0) { |
fa151dc5 | 1190 | output_color(opt, name, strlen(name), opt->colors[GREP_COLOR_FILENAME]); |
1d84f72e RS |
1191 | opt->output(opt, "\n", 1); |
1192 | } | |
5dd06d38 RS |
1193 | opt->last_shown = lno; |
1194 | ||
1d84f72e | 1195 | if (!opt->heading && opt->pathname) { |
fa151dc5 | 1196 | output_color(opt, name, strlen(name), opt->colors[GREP_COLOR_FILENAME]); |
55f638bd | 1197 | output_sep(opt, sign); |
5b594f45 FK |
1198 | } |
1199 | if (opt->linenum) { | |
1200 | char buf[32]; | |
1a168e5c | 1201 | xsnprintf(buf, sizeof(buf), "%d", lno); |
fa151dc5 | 1202 | output_color(opt, buf, strlen(buf), opt->colors[GREP_COLOR_LINENO]); |
55f638bd | 1203 | output_sep(opt, sign); |
5b594f45 | 1204 | } |
89252cd0 TB |
1205 | /* |
1206 | * Treat 'cno' as the 1-indexed offset from the start of a non-context | |
1207 | * line to its first match. Otherwise, 'cno' is 0 indicating that we are | |
1208 | * being called with a context line. | |
1209 | */ | |
1210 | if (opt->columnnum && cno) { | |
1211 | char buf[32]; | |
1212 | xsnprintf(buf, sizeof(buf), "%"PRIuMAX, (uintmax_t)cno); | |
d036d667 | 1213 | output_color(opt, buf, strlen(buf), opt->colors[GREP_COLOR_COLUMNNO]); |
89252cd0 TB |
1214 | output_sep(opt, sign); |
1215 | } | |
c707ded3 TB |
1216 | } |
1217 | ||
1218 | static void show_line(struct grep_opt *opt, char *bol, char *eol, | |
1219 | const char *name, unsigned lno, ssize_t cno, char sign) | |
1220 | { | |
1221 | int rest = eol - bol; | |
9d8db06e TB |
1222 | const char *match_color = NULL; |
1223 | const char *line_color = NULL; | |
c707ded3 TB |
1224 | |
1225 | if (opt->file_break && opt->last_shown == 0) { | |
1226 | if (opt->show_hunk_mark) | |
1227 | opt->output(opt, "\n", 1); | |
1228 | } else if (opt->pre_context || opt->post_context || opt->funcbody) { | |
1229 | if (opt->last_shown == 0) { | |
1230 | if (opt->show_hunk_mark) { | |
87ece7ce | 1231 | output_color(opt, "--", 2, opt->colors[GREP_COLOR_SEP]); |
c707ded3 TB |
1232 | opt->output(opt, "\n", 1); |
1233 | } | |
1234 | } else if (lno > opt->last_shown + 1) { | |
87ece7ce | 1235 | output_color(opt, "--", 2, opt->colors[GREP_COLOR_SEP]); |
c707ded3 TB |
1236 | opt->output(opt, "\n", 1); |
1237 | } | |
1238 | } | |
9d8db06e TB |
1239 | if (!opt->only_matching) { |
1240 | /* | |
1241 | * In case the line we're being called with contains more than | |
1242 | * one match, leave printing each header to the loop below. | |
1243 | */ | |
1244 | show_line_header(opt, name, lno, cno, sign); | |
1245 | } | |
1246 | if (opt->color || opt->only_matching) { | |
7e8f59d5 RS |
1247 | regmatch_t match; |
1248 | enum grep_context ctx = GREP_CONTEXT_BODY; | |
1249 | int ch = *eol; | |
1250 | int eflags = 0; | |
1251 | ||
9d8db06e TB |
1252 | if (opt->color) { |
1253 | if (sign == ':') | |
87ece7ce | 1254 | match_color = opt->colors[GREP_COLOR_MATCH_SELECTED]; |
9d8db06e | 1255 | else |
87ece7ce | 1256 | match_color = opt->colors[GREP_COLOR_MATCH_CONTEXT]; |
9d8db06e | 1257 | if (sign == ':') |
87ece7ce | 1258 | line_color = opt->colors[GREP_COLOR_SELECTED]; |
9d8db06e | 1259 | else if (sign == '-') |
87ece7ce | 1260 | line_color = opt->colors[GREP_COLOR_CONTEXT]; |
9d8db06e | 1261 | else if (sign == '=') |
87ece7ce | 1262 | line_color = opt->colors[GREP_COLOR_FUNCTION]; |
9d8db06e | 1263 | } |
7e8f59d5 RS |
1264 | *eol = '\0'; |
1265 | while (next_match(opt, bol, eol, ctx, &match, eflags)) { | |
1f5b9cc4 RS |
1266 | if (match.rm_so == match.rm_eo) |
1267 | break; | |
5b594f45 | 1268 | |
9d8db06e TB |
1269 | if (opt->only_matching) |
1270 | show_line_header(opt, name, lno, cno, sign); | |
1271 | else | |
1272 | output_color(opt, bol, match.rm_so, line_color); | |
55f638bd | 1273 | output_color(opt, bol + match.rm_so, |
79a77109 | 1274 | match.rm_eo - match.rm_so, match_color); |
9d8db06e TB |
1275 | if (opt->only_matching) |
1276 | opt->output(opt, "\n", 1); | |
7e8f59d5 | 1277 | bol += match.rm_eo; |
9d8db06e | 1278 | cno += match.rm_eo; |
7e8f59d5 RS |
1279 | rest -= match.rm_eo; |
1280 | eflags = REG_NOTBOL; | |
1281 | } | |
1282 | *eol = ch; | |
1283 | } | |
9d8db06e TB |
1284 | if (!opt->only_matching) { |
1285 | output_color(opt, bol, rest, line_color); | |
1286 | opt->output(opt, "\n", 1); | |
1287 | } | |
7e8f59d5 RS |
1288 | } |
1289 | ||
78db6ea9 JK |
1290 | int grep_use_locks; |
1291 | ||
0579f91d TR |
1292 | /* |
1293 | * This lock protects access to the gitattributes machinery, which is | |
1294 | * not thread-safe. | |
1295 | */ | |
1296 | pthread_mutex_t grep_attr_mutex; | |
1297 | ||
78db6ea9 | 1298 | static inline void grep_attr_lock(void) |
0579f91d | 1299 | { |
78db6ea9 | 1300 | if (grep_use_locks) |
0579f91d TR |
1301 | pthread_mutex_lock(&grep_attr_mutex); |
1302 | } | |
1303 | ||
78db6ea9 | 1304 | static inline void grep_attr_unlock(void) |
0579f91d | 1305 | { |
78db6ea9 | 1306 | if (grep_use_locks) |
0579f91d TR |
1307 | pthread_mutex_unlock(&grep_attr_mutex); |
1308 | } | |
b3aeb285 | 1309 | |
e1327023 | 1310 | static int match_funcname(struct grep_opt *opt, struct grep_source *gs, char *bol, char *eol) |
2944e4e6 | 1311 | { |
60ecac98 | 1312 | xdemitconf_t *xecfg = opt->priv; |
0579f91d | 1313 | if (xecfg && !xecfg->find_func) { |
acd00ea0 | 1314 | grep_source_load_driver(gs, opt->repo->index); |
94ad9d9e JK |
1315 | if (gs->driver->funcname.pattern) { |
1316 | const struct userdiff_funcname *pe = &gs->driver->funcname; | |
0579f91d TR |
1317 | xdiff_set_find_func(xecfg, pe->pattern, pe->cflags); |
1318 | } else { | |
1319 | xecfg = opt->priv = NULL; | |
1320 | } | |
1321 | } | |
1322 | ||
1323 | if (xecfg) { | |
60ecac98 RS |
1324 | char buf[1]; |
1325 | return xecfg->find_func(bol, eol - bol, buf, 1, | |
1326 | xecfg->find_func_priv) >= 0; | |
1327 | } | |
1328 | ||
2944e4e6 RS |
1329 | if (bol == eol) |
1330 | return 0; | |
1331 | if (isalpha(*bol) || *bol == '_' || *bol == '$') | |
1332 | return 1; | |
1333 | return 0; | |
1334 | } | |
1335 | ||
e1327023 JK |
1336 | static void show_funcname_line(struct grep_opt *opt, struct grep_source *gs, |
1337 | char *bol, unsigned lno) | |
2944e4e6 | 1338 | { |
e1327023 | 1339 | while (bol > gs->buf) { |
2944e4e6 RS |
1340 | char *eol = --bol; |
1341 | ||
e1327023 | 1342 | while (bol > gs->buf && bol[-1] != '\n') |
2944e4e6 RS |
1343 | bol--; |
1344 | lno--; | |
1345 | ||
1346 | if (lno <= opt->last_shown) | |
1347 | break; | |
1348 | ||
e1327023 | 1349 | if (match_funcname(opt, gs, bol, eol)) { |
89252cd0 | 1350 | show_line(opt, bol, eol, gs->name, lno, 0, '='); |
2944e4e6 RS |
1351 | break; |
1352 | } | |
1353 | } | |
1354 | } | |
1355 | ||
a5dc20b0 RS |
1356 | static int is_empty_line(const char *bol, const char *eol); |
1357 | ||
e1327023 | 1358 | static void show_pre_context(struct grep_opt *opt, struct grep_source *gs, |
ba8ea749 | 1359 | char *bol, char *end, unsigned lno) |
49de3216 | 1360 | { |
6653a01b | 1361 | unsigned cur = lno, from = 1, funcname_lno = 0, orig_from; |
a5dc20b0 | 1362 | int funcname_needed = !!opt->funcname, comment_needed = 0; |
ba8ea749 | 1363 | |
49de3216 RS |
1364 | if (opt->pre_context < lno) |
1365 | from = lno - opt->pre_context; | |
1366 | if (from <= opt->last_shown) | |
1367 | from = opt->last_shown + 1; | |
6653a01b | 1368 | orig_from = from; |
a5dc20b0 RS |
1369 | if (opt->funcbody) { |
1370 | if (match_funcname(opt, gs, bol, end)) | |
1371 | comment_needed = 1; | |
1372 | else | |
1373 | funcname_needed = 1; | |
6653a01b RS |
1374 | from = opt->last_shown + 1; |
1375 | } | |
49de3216 RS |
1376 | |
1377 | /* Rewind. */ | |
6653a01b | 1378 | while (bol > gs->buf && cur > from) { |
a5dc20b0 | 1379 | char *next_bol = bol; |
2944e4e6 RS |
1380 | char *eol = --bol; |
1381 | ||
e1327023 | 1382 | while (bol > gs->buf && bol[-1] != '\n') |
49de3216 RS |
1383 | bol--; |
1384 | cur--; | |
a5dc20b0 RS |
1385 | if (comment_needed && (is_empty_line(bol, eol) || |
1386 | match_funcname(opt, gs, bol, eol))) { | |
1387 | comment_needed = 0; | |
1388 | from = orig_from; | |
1389 | if (cur < from) { | |
1390 | cur++; | |
1391 | bol = next_bol; | |
1392 | break; | |
1393 | } | |
1394 | } | |
e1327023 | 1395 | if (funcname_needed && match_funcname(opt, gs, bol, eol)) { |
2944e4e6 RS |
1396 | funcname_lno = cur; |
1397 | funcname_needed = 0; | |
a5dc20b0 RS |
1398 | if (opt->funcbody) |
1399 | comment_needed = 1; | |
1400 | else | |
1401 | from = orig_from; | |
2944e4e6 | 1402 | } |
49de3216 RS |
1403 | } |
1404 | ||
2944e4e6 RS |
1405 | /* We need to look even further back to find a function signature. */ |
1406 | if (opt->funcname && funcname_needed) | |
e1327023 | 1407 | show_funcname_line(opt, gs, bol, cur); |
2944e4e6 | 1408 | |
49de3216 RS |
1409 | /* Back forward. */ |
1410 | while (cur < lno) { | |
2944e4e6 | 1411 | char *eol = bol, sign = (cur == funcname_lno) ? '=' : '-'; |
49de3216 RS |
1412 | |
1413 | while (*eol != '\n') | |
1414 | eol++; | |
89252cd0 | 1415 | show_line(opt, bol, eol, gs->name, cur, 0, sign); |
49de3216 RS |
1416 | bol = eol + 1; |
1417 | cur++; | |
1418 | } | |
1419 | } | |
1420 | ||
a26345b6 JH |
1421 | static int should_lookahead(struct grep_opt *opt) |
1422 | { | |
1423 | struct grep_pat *p; | |
1424 | ||
1425 | if (opt->extended) | |
1426 | return 0; /* punt for too complex stuff */ | |
1427 | if (opt->invert) | |
1428 | return 0; | |
1429 | for (p = opt->pattern_list; p; p = p->next) { | |
1430 | if (p->token != GREP_PATTERN) | |
1431 | return 0; /* punt for "header only" and stuff */ | |
1432 | } | |
1433 | return 1; | |
1434 | } | |
1435 | ||
1436 | static int look_ahead(struct grep_opt *opt, | |
1437 | unsigned long *left_p, | |
1438 | unsigned *lno_p, | |
1439 | char **bol_p) | |
1440 | { | |
1441 | unsigned lno = *lno_p; | |
1442 | char *bol = *bol_p; | |
1443 | struct grep_pat *p; | |
1444 | char *sp, *last_bol; | |
1445 | regoff_t earliest = -1; | |
1446 | ||
1447 | for (p = opt->pattern_list; p; p = p->next) { | |
1448 | int hit; | |
1449 | regmatch_t m; | |
1450 | ||
97e77784 | 1451 | hit = patmatch(p, bol, bol + *left_p, &m, 0); |
a26345b6 JH |
1452 | if (!hit || m.rm_so < 0 || m.rm_eo < 0) |
1453 | continue; | |
1454 | if (earliest < 0 || m.rm_so < earliest) | |
1455 | earliest = m.rm_so; | |
1456 | } | |
1457 | ||
1458 | if (earliest < 0) { | |
1459 | *bol_p = bol + *left_p; | |
1460 | *left_p = 0; | |
1461 | return 1; | |
1462 | } | |
1463 | for (sp = bol + earliest; bol < sp && sp[-1] != '\n'; sp--) | |
1464 | ; /* find the beginning of the line */ | |
1465 | last_bol = sp; | |
1466 | ||
1467 | for (sp = bol; sp < last_bol; sp++) { | |
1468 | if (*sp == '\n') | |
1469 | lno++; | |
1470 | } | |
1471 | *left_p -= last_bol - bol; | |
1472 | *bol_p = last_bol; | |
1473 | *lno_p = lno; | |
1474 | return 0; | |
1475 | } | |
1476 | ||
38bbc2ea NTND |
1477 | static int fill_textconv_grep(struct repository *r, |
1478 | struct userdiff_driver *driver, | |
335ec3bf JK |
1479 | struct grep_source *gs) |
1480 | { | |
1481 | struct diff_filespec *df; | |
1482 | char *buf; | |
1483 | size_t size; | |
1484 | ||
1485 | if (!driver || !driver->textconv) | |
1486 | return grep_source_load(gs); | |
1487 | ||
1488 | /* | |
1489 | * The textconv interface is intimately tied to diff_filespecs, so we | |
1490 | * have to pretend to be one. If we could unify the grep_source | |
1491 | * and diff_filespec structs, this mess could just go away. | |
1492 | */ | |
1493 | df = alloc_filespec(gs->path); | |
1494 | switch (gs->type) { | |
1c41c82b | 1495 | case GREP_SOURCE_OID: |
335ec3bf JK |
1496 | fill_filespec(df, gs->identifier, 1, 0100644); |
1497 | break; | |
1498 | case GREP_SOURCE_FILE: | |
14228447 | 1499 | fill_filespec(df, null_oid(), 0, 0100644); |
335ec3bf JK |
1500 | break; |
1501 | default: | |
033abf97 | 1502 | BUG("attempt to textconv something without a path?"); |
335ec3bf JK |
1503 | } |
1504 | ||
1505 | /* | |
1d1729ca MT |
1506 | * fill_textconv is not remotely thread-safe; it modifies the global |
1507 | * diff tempfile structure, writes to the_repo's odb and might | |
1508 | * internally call thread-unsafe functions such as the | |
1509 | * prepare_packed_git() lazy-initializator. Because of the last two, we | |
1510 | * must ensure mutual exclusion between this call and the object reading | |
1511 | * API, thus we use obj_read_lock() here. | |
1512 | * | |
1513 | * TODO: allowing text conversion to run in parallel with object | |
1514 | * reading operations might increase performance in the multithreaded | |
1515 | * non-worktreee git-grep with --textconv. | |
335ec3bf | 1516 | */ |
1d1729ca | 1517 | obj_read_lock(); |
38bbc2ea | 1518 | size = fill_textconv(r, driver, df, &buf); |
1d1729ca | 1519 | obj_read_unlock(); |
335ec3bf JK |
1520 | free_filespec(df); |
1521 | ||
1522 | /* | |
1523 | * The normal fill_textconv usage by the diff machinery would just keep | |
1524 | * the textconv'd buf separate from the diff_filespec. But much of the | |
1525 | * grep code passes around a grep_source and assumes that its "buf" | |
1526 | * pointer is the beginning of the thing we are searching. So let's | |
1527 | * install our textconv'd version into the grep_source, taking care not | |
1528 | * to leak any existing buffer. | |
1529 | */ | |
1530 | grep_source_clear_data(gs); | |
1531 | gs->buf = buf; | |
1532 | gs->size = size; | |
1533 | ||
1534 | return 0; | |
1535 | } | |
1536 | ||
4aa2c475 RS |
1537 | static int is_empty_line(const char *bol, const char *eol) |
1538 | { | |
1539 | while (bol < eol && isspace(*bol)) | |
1540 | bol++; | |
1541 | return bol == eol; | |
1542 | } | |
1543 | ||
e1327023 | 1544 | static int grep_source_1(struct grep_opt *opt, struct grep_source *gs, int collect_hits) |
83b5d2f5 | 1545 | { |
e1327023 | 1546 | char *bol; |
4aa2c475 | 1547 | char *peek_bol = NULL; |
e1327023 | 1548 | unsigned long left; |
83b5d2f5 | 1549 | unsigned lno = 1; |
83b5d2f5 | 1550 | unsigned last_hit = 0; |
83b5d2f5 | 1551 | int binary_match_only = 0; |
83b5d2f5 | 1552 | unsigned count = 0; |
a26345b6 | 1553 | int try_lookahead = 0; |
ba8ea749 | 1554 | int show_function = 0; |
335ec3bf | 1555 | struct userdiff_driver *textconv = NULL; |
480c1ca6 | 1556 | enum grep_context ctx = GREP_CONTEXT_HEAD; |
60ecac98 | 1557 | xdemitconf_t xecfg; |
83b5d2f5 | 1558 | |
de99eb0c ES |
1559 | if (!opt->status_only && gs->name == NULL) |
1560 | BUG("grep call which could print a name requires " | |
1561 | "grep_source.name be non-NULL"); | |
1562 | ||
5b594f45 FK |
1563 | if (!opt->output) |
1564 | opt->output = std_output; | |
1565 | ||
ba8ea749 RS |
1566 | if (opt->pre_context || opt->post_context || opt->file_break || |
1567 | opt->funcbody) { | |
08303c36 RS |
1568 | /* Show hunk marks, except for the first file. */ |
1569 | if (opt->last_shown) | |
1570 | opt->show_hunk_mark = 1; | |
1571 | /* | |
1572 | * If we're using threads then we can't easily identify | |
1573 | * the first file. Always put hunk marks in that case | |
1574 | * and skip the very first one later in work_done(). | |
1575 | */ | |
1576 | if (opt->output != std_output) | |
1577 | opt->show_hunk_mark = 1; | |
1578 | } | |
431d6e7b RS |
1579 | opt->last_shown = 0; |
1580 | ||
335ec3bf | 1581 | if (opt->allow_textconv) { |
acd00ea0 | 1582 | grep_source_load_driver(gs, opt->repo->index); |
335ec3bf JK |
1583 | /* |
1584 | * We might set up the shared textconv cache data here, which | |
1d1729ca MT |
1585 | * is not thread-safe. Also, get_oid_with_context() and |
1586 | * parse_object() might be internally called. As they are not | |
84544f2e | 1587 | * currently thread-safe and might be racy with object reading, |
1d1729ca | 1588 | * obj_read_lock() must be called. |
335ec3bf JK |
1589 | */ |
1590 | grep_attr_lock(); | |
1d1729ca | 1591 | obj_read_lock(); |
bd7ad45b | 1592 | textconv = userdiff_get_textconv(opt->repo, gs->driver); |
1d1729ca | 1593 | obj_read_unlock(); |
335ec3bf JK |
1594 | grep_attr_unlock(); |
1595 | } | |
1596 | ||
1597 | /* | |
1598 | * We know the result of a textconv is text, so we only have to care | |
1599 | * about binary handling if we are not using it. | |
1600 | */ | |
1601 | if (!textconv) { | |
1602 | switch (opt->binary) { | |
1603 | case GREP_BINARY_DEFAULT: | |
acd00ea0 | 1604 | if (grep_source_is_binary(gs, opt->repo->index)) |
335ec3bf JK |
1605 | binary_match_only = 1; |
1606 | break; | |
1607 | case GREP_BINARY_NOMATCH: | |
acd00ea0 | 1608 | if (grep_source_is_binary(gs, opt->repo->index)) |
335ec3bf JK |
1609 | return 0; /* Assume unmatch */ |
1610 | break; | |
1611 | case GREP_BINARY_TEXT: | |
1612 | break; | |
1613 | default: | |
033abf97 | 1614 | BUG("unknown binary handling mode"); |
335ec3bf | 1615 | } |
83b5d2f5 JH |
1616 | } |
1617 | ||
60ecac98 | 1618 | memset(&xecfg, 0, sizeof(xecfg)); |
0579f91d TR |
1619 | opt->priv = &xecfg; |
1620 | ||
a26345b6 | 1621 | try_lookahead = should_lookahead(opt); |
60ecac98 | 1622 | |
38bbc2ea | 1623 | if (fill_textconv_grep(opt->repo, textconv, gs) < 0) |
08265798 JK |
1624 | return 0; |
1625 | ||
e1327023 JK |
1626 | bol = gs->buf; |
1627 | left = gs->size; | |
83b5d2f5 JH |
1628 | while (left) { |
1629 | char *eol, ch; | |
0ab7befa | 1630 | int hit; |
89252cd0 | 1631 | ssize_t cno; |
68d686e6 | 1632 | ssize_t col = -1, icol = -1; |
83b5d2f5 | 1633 | |
a26345b6 | 1634 | /* |
8997da38 | 1635 | * look_ahead() skips quickly to the line that possibly |
a26345b6 JH |
1636 | * has the next hit; don't call it if we need to do |
1637 | * something more than just skipping the current line | |
1638 | * in response to an unmatch for the current line. E.g. | |
1639 | * inside a post-context window, we will show the current | |
1640 | * line as a context around the previous hit when it | |
1641 | * doesn't hit. | |
1642 | */ | |
1643 | if (try_lookahead | |
1644 | && !(last_hit | |
ba8ea749 RS |
1645 | && (show_function || |
1646 | lno <= last_hit + opt->post_context)) | |
a26345b6 JH |
1647 | && look_ahead(opt, &left, &lno, &bol)) |
1648 | break; | |
83b5d2f5 JH |
1649 | eol = end_of_line(bol, &left); |
1650 | ch = *eol; | |
1651 | *eol = 0; | |
1652 | ||
480c1ca6 JH |
1653 | if ((ctx == GREP_CONTEXT_HEAD) && (eol == bol)) |
1654 | ctx = GREP_CONTEXT_BODY; | |
1655 | ||
68d686e6 | 1656 | hit = match_line(opt, bol, eol, &col, &icol, ctx, collect_hits); |
83b5d2f5 JH |
1657 | *eol = ch; |
1658 | ||
0ab7befa JH |
1659 | if (collect_hits) |
1660 | goto next_line; | |
1661 | ||
83b5d2f5 JH |
1662 | /* "grep -v -e foo -e bla" should list lines |
1663 | * that do not have either, so inversion should | |
1664 | * be done outside. | |
1665 | */ | |
1666 | if (opt->invert) | |
1667 | hit = !hit; | |
1668 | if (opt->unmatch_name_only) { | |
1669 | if (hit) | |
1670 | return 0; | |
1671 | goto next_line; | |
1672 | } | |
1673 | if (hit) { | |
1674 | count++; | |
1675 | if (opt->status_only) | |
1676 | return 1; | |
321ffcc0 | 1677 | if (opt->name_only) { |
e1327023 | 1678 | show_name(opt, gs->name); |
321ffcc0 RS |
1679 | return 1; |
1680 | } | |
c30c10cf RS |
1681 | if (opt->count) |
1682 | goto next_line; | |
83b5d2f5 | 1683 | if (binary_match_only) { |
5b594f45 | 1684 | opt->output(opt, "Binary file ", 12); |
e1327023 | 1685 | output_color(opt, gs->name, strlen(gs->name), |
fa151dc5 | 1686 | opt->colors[GREP_COLOR_FILENAME]); |
5b594f45 | 1687 | opt->output(opt, " matches\n", 9); |
83b5d2f5 JH |
1688 | return 1; |
1689 | } | |
83b5d2f5 JH |
1690 | /* Hit at this line. If we haven't shown the |
1691 | * pre-context lines, we would need to show them. | |
83b5d2f5 | 1692 | */ |
ba8ea749 | 1693 | if (opt->pre_context || opt->funcbody) |
e1327023 | 1694 | show_pre_context(opt, gs, bol, eol, lno); |
2944e4e6 | 1695 | else if (opt->funcname) |
e1327023 | 1696 | show_funcname_line(opt, gs, bol, lno); |
89252cd0 TB |
1697 | cno = opt->invert ? icol : col; |
1698 | if (cno < 0) { | |
1699 | /* | |
1700 | * A negative cno indicates that there was no | |
1701 | * match on the line. We are thus inverted and | |
1702 | * being asked to show all lines that _don't_ | |
1703 | * match a given expression. Therefore, set cno | |
1704 | * to 0 to suggest the whole line matches. | |
1705 | */ | |
1706 | cno = 0; | |
1707 | } | |
1708 | show_line(opt, bol, eol, gs->name, lno, cno + 1, ':'); | |
5dd06d38 | 1709 | last_hit = lno; |
ba8ea749 RS |
1710 | if (opt->funcbody) |
1711 | show_function = 1; | |
1712 | goto next_line; | |
83b5d2f5 | 1713 | } |
4aa2c475 RS |
1714 | if (show_function && (!peek_bol || peek_bol < bol)) { |
1715 | unsigned long peek_left = left; | |
1716 | char *peek_eol = eol; | |
1717 | ||
1718 | /* | |
1719 | * Trailing empty lines are not interesting. | |
1720 | * Peek past them to see if they belong to the | |
1721 | * body of the current function. | |
1722 | */ | |
1723 | peek_bol = bol; | |
1724 | while (is_empty_line(peek_bol, peek_eol)) { | |
1725 | peek_bol = peek_eol + 1; | |
1726 | peek_eol = end_of_line(peek_bol, &peek_left); | |
1727 | } | |
1728 | ||
1729 | if (match_funcname(opt, gs, peek_bol, peek_eol)) | |
1730 | show_function = 0; | |
1731 | } | |
ba8ea749 RS |
1732 | if (show_function || |
1733 | (last_hit && lno <= last_hit + opt->post_context)) { | |
83b5d2f5 JH |
1734 | /* If the last hit is within the post context, |
1735 | * we need to show this line. | |
1736 | */ | |
89252cd0 | 1737 | show_line(opt, bol, eol, gs->name, lno, col + 1, '-'); |
83b5d2f5 | 1738 | } |
83b5d2f5 JH |
1739 | |
1740 | next_line: | |
1741 | bol = eol + 1; | |
1742 | if (!left) | |
1743 | break; | |
1744 | left--; | |
1745 | lno++; | |
1746 | } | |
1747 | ||
0ab7befa JH |
1748 | if (collect_hits) |
1749 | return 0; | |
b48fb5b6 | 1750 | |
83b5d2f5 | 1751 | if (opt->status_only) |
e1f68c66 | 1752 | return opt->unmatch_name_only; |
83b5d2f5 JH |
1753 | if (opt->unmatch_name_only) { |
1754 | /* We did not see any hit, so we want to show this */ | |
e1327023 | 1755 | show_name(opt, gs->name); |
83b5d2f5 JH |
1756 | return 1; |
1757 | } | |
1758 | ||
60ecac98 RS |
1759 | xdiff_clear_find_func(&xecfg); |
1760 | opt->priv = NULL; | |
1761 | ||
83b5d2f5 JH |
1762 | /* NEEDSWORK: |
1763 | * The real "grep -c foo *.c" gives many "bar.c:0" lines, | |
1764 | * which feels mostly useless but sometimes useful. Maybe | |
1765 | * make it another option? For now suppress them. | |
1766 | */ | |
5b594f45 FK |
1767 | if (opt->count && count) { |
1768 | char buf[32]; | |
f76d947a RS |
1769 | if (opt->pathname) { |
1770 | output_color(opt, gs->name, strlen(gs->name), | |
fa151dc5 | 1771 | opt->colors[GREP_COLOR_FILENAME]); |
f76d947a RS |
1772 | output_sep(opt, ':'); |
1773 | } | |
1a168e5c | 1774 | xsnprintf(buf, sizeof(buf), "%u\n", count); |
5b594f45 | 1775 | opt->output(opt, buf, strlen(buf)); |
c30c10cf | 1776 | return 1; |
5b594f45 | 1777 | } |
83b5d2f5 JH |
1778 | return !!last_hit; |
1779 | } | |
1780 | ||
0ab7befa JH |
1781 | static void clr_hit_marker(struct grep_expr *x) |
1782 | { | |
1783 | /* All-hit markers are meaningful only at the very top level | |
1784 | * OR node. | |
1785 | */ | |
1786 | while (1) { | |
1787 | x->hit = 0; | |
1788 | if (x->node != GREP_NODE_OR) | |
1789 | return; | |
1790 | x->u.binary.left->hit = 0; | |
1791 | x = x->u.binary.right; | |
1792 | } | |
1793 | } | |
1794 | ||
1795 | static int chk_hit_marker(struct grep_expr *x) | |
1796 | { | |
1797 | /* Top level nodes have hit markers. See if they all are hits */ | |
1798 | while (1) { | |
1799 | if (x->node != GREP_NODE_OR) | |
1800 | return x->hit; | |
1801 | if (!x->u.binary.left->hit) | |
1802 | return 0; | |
1803 | x = x->u.binary.right; | |
1804 | } | |
1805 | } | |
1806 | ||
e1327023 | 1807 | int grep_source(struct grep_opt *opt, struct grep_source *gs) |
0ab7befa JH |
1808 | { |
1809 | /* | |
1810 | * we do not have to do the two-pass grep when we do not check | |
1811 | * buffer-wide "all-match". | |
1812 | */ | |
1813 | if (!opt->all_match) | |
e1327023 | 1814 | return grep_source_1(opt, gs, 0); |
0ab7befa JH |
1815 | |
1816 | /* Otherwise the toplevel "or" terms hit a bit differently. | |
1817 | * We first clear hit markers from them. | |
1818 | */ | |
1819 | clr_hit_marker(opt->pattern_expression); | |
e1327023 | 1820 | grep_source_1(opt, gs, 1); |
0ab7befa JH |
1821 | |
1822 | if (!chk_hit_marker(opt->pattern_expression)) | |
1823 | return 0; | |
1824 | ||
e1327023 JK |
1825 | return grep_source_1(opt, gs, 0); |
1826 | } | |
1827 | ||
c876d6da | 1828 | int grep_buffer(struct grep_opt *opt, char *buf, unsigned long size) |
e1327023 JK |
1829 | { |
1830 | struct grep_source gs; | |
1831 | int r; | |
1832 | ||
55c61688 | 1833 | grep_source_init(&gs, GREP_SOURCE_BUF, NULL, NULL, NULL); |
e1327023 JK |
1834 | gs.buf = buf; |
1835 | gs.size = size; | |
1836 | ||
1837 | r = grep_source(opt, &gs); | |
1838 | ||
1839 | grep_source_clear(&gs); | |
1840 | return r; | |
1841 | } | |
1842 | ||
1843 | void grep_source_init(struct grep_source *gs, enum grep_source_type type, | |
55c61688 NTND |
1844 | const char *name, const char *path, |
1845 | const void *identifier) | |
e1327023 JK |
1846 | { |
1847 | gs->type = type; | |
8c53f071 JK |
1848 | gs->name = xstrdup_or_null(name); |
1849 | gs->path = xstrdup_or_null(path); | |
e1327023 JK |
1850 | gs->buf = NULL; |
1851 | gs->size = 0; | |
94ad9d9e | 1852 | gs->driver = NULL; |
e1327023 JK |
1853 | |
1854 | switch (type) { | |
1855 | case GREP_SOURCE_FILE: | |
1856 | gs->identifier = xstrdup(identifier); | |
1857 | break; | |
1c41c82b BW |
1858 | case GREP_SOURCE_OID: |
1859 | gs->identifier = oiddup(identifier); | |
e1327023 JK |
1860 | break; |
1861 | case GREP_SOURCE_BUF: | |
1862 | gs->identifier = NULL; | |
4538eef5 | 1863 | break; |
e1327023 JK |
1864 | } |
1865 | } | |
1866 | ||
1867 | void grep_source_clear(struct grep_source *gs) | |
1868 | { | |
88ce3ef6 ÆAB |
1869 | FREE_AND_NULL(gs->name); |
1870 | FREE_AND_NULL(gs->path); | |
1871 | FREE_AND_NULL(gs->identifier); | |
e1327023 JK |
1872 | grep_source_clear_data(gs); |
1873 | } | |
1874 | ||
1875 | void grep_source_clear_data(struct grep_source *gs) | |
1876 | { | |
1877 | switch (gs->type) { | |
1878 | case GREP_SOURCE_FILE: | |
1c41c82b | 1879 | case GREP_SOURCE_OID: |
6a83d902 | 1880 | FREE_AND_NULL(gs->buf); |
e1327023 JK |
1881 | gs->size = 0; |
1882 | break; | |
1883 | case GREP_SOURCE_BUF: | |
1884 | /* leave user-provided buf intact */ | |
1885 | break; | |
1886 | } | |
1887 | } | |
1888 | ||
1c41c82b | 1889 | static int grep_source_load_oid(struct grep_source *gs) |
e1327023 JK |
1890 | { |
1891 | enum object_type type; | |
1892 | ||
b4f5aca4 | 1893 | gs->buf = read_object_file(gs->identifier, &type, &gs->size); |
e1327023 JK |
1894 | if (!gs->buf) |
1895 | return error(_("'%s': unable to read %s"), | |
1896 | gs->name, | |
1c41c82b | 1897 | oid_to_hex(gs->identifier)); |
e1327023 JK |
1898 | return 0; |
1899 | } | |
1900 | ||
1901 | static int grep_source_load_file(struct grep_source *gs) | |
1902 | { | |
1903 | const char *filename = gs->identifier; | |
1904 | struct stat st; | |
1905 | char *data; | |
1906 | size_t size; | |
1907 | int i; | |
1908 | ||
1909 | if (lstat(filename, &st) < 0) { | |
1910 | err_ret: | |
1911 | if (errno != ENOENT) | |
7645d8f1 | 1912 | error_errno(_("failed to stat '%s'"), filename); |
e1327023 JK |
1913 | return -1; |
1914 | } | |
1915 | if (!S_ISREG(st.st_mode)) | |
1916 | return -1; | |
1917 | size = xsize_t(st.st_size); | |
1918 | i = open(filename, O_RDONLY); | |
1919 | if (i < 0) | |
1920 | goto err_ret; | |
3733e694 | 1921 | data = xmallocz(size); |
e1327023 | 1922 | if (st.st_size != read_in_full(i, data, size)) { |
7645d8f1 | 1923 | error_errno(_("'%s': short read"), filename); |
e1327023 JK |
1924 | close(i); |
1925 | free(data); | |
1926 | return -1; | |
1927 | } | |
1928 | close(i); | |
e1327023 JK |
1929 | |
1930 | gs->buf = data; | |
1931 | gs->size = size; | |
1932 | return 0; | |
1933 | } | |
1934 | ||
3083301e | 1935 | static int grep_source_load(struct grep_source *gs) |
e1327023 JK |
1936 | { |
1937 | if (gs->buf) | |
1938 | return 0; | |
1939 | ||
1940 | switch (gs->type) { | |
1941 | case GREP_SOURCE_FILE: | |
1942 | return grep_source_load_file(gs); | |
1c41c82b BW |
1943 | case GREP_SOURCE_OID: |
1944 | return grep_source_load_oid(gs); | |
e1327023 JK |
1945 | case GREP_SOURCE_BUF: |
1946 | return gs->buf ? 0 : -1; | |
1947 | } | |
033abf97 | 1948 | BUG("invalid grep_source type to load"); |
0ab7befa | 1949 | } |
94ad9d9e | 1950 | |
acd00ea0 NTND |
1951 | void grep_source_load_driver(struct grep_source *gs, |
1952 | struct index_state *istate) | |
94ad9d9e JK |
1953 | { |
1954 | if (gs->driver) | |
1955 | return; | |
1956 | ||
1957 | grep_attr_lock(); | |
1d1729ca | 1958 | if (gs->path) |
acd00ea0 | 1959 | gs->driver = userdiff_find_by_path(istate, gs->path); |
94ad9d9e JK |
1960 | if (!gs->driver) |
1961 | gs->driver = userdiff_find_by_name("default"); | |
1962 | grep_attr_unlock(); | |
1963 | } | |
41b59bfc | 1964 | |
acd00ea0 NTND |
1965 | static int grep_source_is_binary(struct grep_source *gs, |
1966 | struct index_state *istate) | |
41b59bfc | 1967 | { |
acd00ea0 | 1968 | grep_source_load_driver(gs, istate); |
41b59bfc JK |
1969 | if (gs->driver->binary != -1) |
1970 | return gs->driver->binary; | |
1971 | ||
1972 | if (!grep_source_load(gs)) | |
1973 | return buffer_is_binary(gs->buf, gs->size); | |
1974 | ||
1975 | return 0; | |
1976 | } |