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4f6728d5 | 1 | #include "git-compat-util.h" |
b2141fc1 | 2 | #include "config.h" |
f394e093 | 3 | #include "gettext.h" |
83b5d2f5 | 4 | #include "grep.h" |
41771fa4 | 5 | #include "hex.h" |
a034e910 | 6 | #include "object-store-ll.h" |
d4a4f929 | 7 | #include "pretty.h" |
60ecac98 | 8 | #include "userdiff.h" |
6bfce93e | 9 | #include "xdiff-interface.h" |
335ec3bf JK |
10 | #include "diff.h" |
11 | #include "diffcore.h" | |
5c1ebcca | 12 | #include "commit.h" |
793dc676 | 13 | #include "quote.h" |
3ac68a93 | 14 | #include "help.h" |
83b5d2f5 | 15 | |
07a7d656 | 16 | static int grep_source_load(struct grep_source *gs); |
acd00ea0 NTND |
17 | static int grep_source_is_binary(struct grep_source *gs, |
18 | struct index_state *istate); | |
07a7d656 | 19 | |
bcba4462 | 20 | static void std_output(struct grep_opt *opt UNUSED, const void *buf, size_t size) |
96313423 MÅ |
21 | { |
22 | fwrite(buf, size, 1, stdout); | |
23 | } | |
24 | ||
fa151dc5 NTND |
25 | static const char *color_grep_slots[] = { |
26 | [GREP_COLOR_CONTEXT] = "context", | |
27 | [GREP_COLOR_FILENAME] = "filename", | |
28 | [GREP_COLOR_FUNCTION] = "function", | |
29 | [GREP_COLOR_LINENO] = "lineNumber", | |
d036d667 | 30 | [GREP_COLOR_COLUMNNO] = "column", |
fa151dc5 NTND |
31 | [GREP_COLOR_MATCH_CONTEXT] = "matchContext", |
32 | [GREP_COLOR_MATCH_SELECTED] = "matchSelected", | |
33 | [GREP_COLOR_SELECTED] = "selected", | |
34 | [GREP_COLOR_SEP] = "separator", | |
35 | }; | |
36 | ||
7687a054 JH |
37 | static int parse_pattern_type_arg(const char *opt, const char *arg) |
38 | { | |
39 | if (!strcmp(arg, "default")) | |
40 | return GREP_PATTERN_TYPE_UNSPECIFIED; | |
41 | else if (!strcmp(arg, "basic")) | |
42 | return GREP_PATTERN_TYPE_BRE; | |
43 | else if (!strcmp(arg, "extended")) | |
44 | return GREP_PATTERN_TYPE_ERE; | |
45 | else if (!strcmp(arg, "fixed")) | |
46 | return GREP_PATTERN_TYPE_FIXED; | |
47 | else if (!strcmp(arg, "perl")) | |
48 | return GREP_PATTERN_TYPE_PCRE; | |
49 | die("bad %s argument: %s", opt, arg); | |
50 | } | |
51 | ||
3ac68a93 NTND |
52 | define_list_config_array_extra(color_grep_slots, {"match"}); |
53 | ||
7687a054 JH |
54 | /* |
55 | * Read the configuration file once and store it in | |
56 | * the grep_defaults template. | |
57 | */ | |
a4e7e317 GC |
58 | int grep_config(const char *var, const char *value, |
59 | const struct config_context *ctx, void *cb) | |
7687a054 | 60 | { |
72365bb4 | 61 | struct grep_opt *opt = cb; |
fa151dc5 | 62 | const char *slot; |
7687a054 JH |
63 | |
64 | if (userdiff_config(var, value) < 0) | |
65 | return -1; | |
66 | ||
67 | if (!strcmp(var, "grep.extendedregexp")) { | |
c7e38551 | 68 | opt->extended_regexp_option = git_config_bool(var, value); |
7687a054 JH |
69 | return 0; |
70 | } | |
71 | ||
72 | if (!strcmp(var, "grep.patterntype")) { | |
73 | opt->pattern_type_option = parse_pattern_type_arg(var, value); | |
74 | return 0; | |
75 | } | |
76 | ||
77 | if (!strcmp(var, "grep.linenumber")) { | |
78 | opt->linenum = git_config_bool(var, value); | |
79 | return 0; | |
80 | } | |
6653fec3 TB |
81 | if (!strcmp(var, "grep.column")) { |
82 | opt->columnnum = git_config_bool(var, value); | |
83 | return 0; | |
84 | } | |
7687a054 | 85 | |
6453f7b3 AS |
86 | if (!strcmp(var, "grep.fullname")) { |
87 | opt->relative = !git_config_bool(var, value); | |
88 | return 0; | |
89 | } | |
90 | ||
7687a054 JH |
91 | if (!strcmp(var, "color.grep")) |
92 | opt->color = git_config_colorbool(var, value); | |
fa151dc5 | 93 | if (!strcmp(var, "color.grep.match")) { |
a4e7e317 | 94 | if (grep_config("color.grep.matchcontext", value, ctx, cb) < 0) |
fa151dc5 | 95 | return -1; |
a4e7e317 | 96 | if (grep_config("color.grep.matchselected", value, ctx, cb) < 0) |
fa151dc5 NTND |
97 | return -1; |
98 | } else if (skip_prefix(var, "color.grep.", &slot)) { | |
99 | int i = LOOKUP_CONFIG(color_grep_slots, slot); | |
100 | char *color; | |
101 | ||
102 | if (i < 0) | |
103 | return -1; | |
104 | color = opt->colors[i]; | |
7687a054 JH |
105 | if (!value) |
106 | return config_error_nonbool(var); | |
f6c5a296 | 107 | return color_parse(value, color); |
7687a054 JH |
108 | } |
109 | return 0; | |
110 | } | |
111 | ||
9725c8dd | 112 | void grep_init(struct grep_opt *opt, struct repository *repo) |
7687a054 | 113 | { |
72365bb4 ÆAB |
114 | struct grep_opt blank = GREP_OPT_INIT; |
115 | memcpy(opt, &blank, sizeof(*opt)); | |
6ba9bb76 | 116 | |
38bbc2ea | 117 | opt->repo = repo; |
7687a054 JH |
118 | opt->pattern_tail = &opt->pattern_list; |
119 | opt->header_tail = &opt->header_list; | |
7687a054 | 120 | } |
07a7d656 | 121 | |
fc456751 RS |
122 | static struct grep_pat *create_grep_pat(const char *pat, size_t patlen, |
123 | const char *origin, int no, | |
124 | enum grep_pat_token t, | |
125 | enum grep_header_field field) | |
a4d7d2c6 JH |
126 | { |
127 | struct grep_pat *p = xcalloc(1, sizeof(*p)); | |
526a858a | 128 | p->pattern = xmemdupz(pat, patlen); |
fc456751 RS |
129 | p->patternlen = patlen; |
130 | p->origin = origin; | |
131 | p->no = no; | |
132 | p->token = t; | |
a4d7d2c6 | 133 | p->field = field; |
fc456751 RS |
134 | return p; |
135 | } | |
136 | ||
2b3873ff RS |
137 | static void do_append_grep_pat(struct grep_pat ***tail, struct grep_pat *p) |
138 | { | |
139 | **tail = p; | |
140 | *tail = &p->next; | |
a4d7d2c6 | 141 | p->next = NULL; |
526a858a RS |
142 | |
143 | switch (p->token) { | |
144 | case GREP_PATTERN: /* atom */ | |
145 | case GREP_PATTERN_HEAD: | |
146 | case GREP_PATTERN_BODY: | |
147 | for (;;) { | |
148 | struct grep_pat *new_pat; | |
149 | size_t len = 0; | |
150 | char *cp = p->pattern + p->patternlen, *nl = NULL; | |
151 | while (++len <= p->patternlen) { | |
152 | if (*(--cp) == '\n') { | |
153 | nl = cp; | |
154 | break; | |
155 | } | |
156 | } | |
157 | if (!nl) | |
158 | break; | |
159 | new_pat = create_grep_pat(nl + 1, len - 1, p->origin, | |
160 | p->no, p->token, p->field); | |
161 | new_pat->next = p->next; | |
162 | if (!p->next) | |
163 | *tail = &new_pat->next; | |
164 | p->next = new_pat; | |
165 | *nl = '\0'; | |
166 | p->patternlen -= len; | |
167 | } | |
168 | break; | |
169 | default: | |
170 | break; | |
171 | } | |
2b3873ff RS |
172 | } |
173 | ||
fc456751 RS |
174 | void append_header_grep_pattern(struct grep_opt *opt, |
175 | enum grep_header_field field, const char *pat) | |
176 | { | |
177 | struct grep_pat *p = create_grep_pat(pat, strlen(pat), "header", 0, | |
178 | GREP_PATTERN_HEAD, field); | |
baa6378f JH |
179 | if (field == GREP_HEADER_REFLOG) |
180 | opt->use_reflog_filter = 1; | |
2b3873ff | 181 | do_append_grep_pat(&opt->header_tail, p); |
a4d7d2c6 JH |
182 | } |
183 | ||
83b5d2f5 JH |
184 | void append_grep_pattern(struct grep_opt *opt, const char *pat, |
185 | const char *origin, int no, enum grep_pat_token t) | |
ed40a095 RS |
186 | { |
187 | append_grep_pat(opt, pat, strlen(pat), origin, no, t); | |
188 | } | |
189 | ||
190 | void append_grep_pat(struct grep_opt *opt, const char *pat, size_t patlen, | |
191 | const char *origin, int no, enum grep_pat_token t) | |
83b5d2f5 | 192 | { |
fc456751 | 193 | struct grep_pat *p = create_grep_pat(pat, patlen, origin, no, t, 0); |
2b3873ff | 194 | do_append_grep_pat(&opt->pattern_tail, p); |
83b5d2f5 JH |
195 | } |
196 | ||
5b594f45 FK |
197 | struct grep_opt *grep_opt_dup(const struct grep_opt *opt) |
198 | { | |
199 | struct grep_pat *pat; | |
200 | struct grep_opt *ret = xmalloc(sizeof(struct grep_opt)); | |
201 | *ret = *opt; | |
202 | ||
203 | ret->pattern_list = NULL; | |
204 | ret->pattern_tail = &ret->pattern_list; | |
205 | ||
206 | for(pat = opt->pattern_list; pat != NULL; pat = pat->next) | |
207 | { | |
208 | if(pat->token == GREP_PATTERN_HEAD) | |
209 | append_header_grep_pattern(ret, pat->field, | |
210 | pat->pattern); | |
211 | else | |
ed40a095 RS |
212 | append_grep_pat(ret, pat->pattern, pat->patternlen, |
213 | pat->origin, pat->no, pat->token); | |
5b594f45 FK |
214 | } |
215 | ||
216 | return ret; | |
217 | } | |
218 | ||
a30c148a MK |
219 | static NORETURN void compile_regexp_failed(const struct grep_pat *p, |
220 | const char *error) | |
221 | { | |
222 | char where[1024]; | |
223 | ||
224 | if (p->no) | |
19bdd3e7 | 225 | xsnprintf(where, sizeof(where), "In '%s' at %d, ", p->origin, p->no); |
a30c148a | 226 | else if (p->origin) |
19bdd3e7 | 227 | xsnprintf(where, sizeof(where), "%s, ", p->origin); |
a30c148a MK |
228 | else |
229 | where[0] = 0; | |
230 | ||
231 | die("%s'%s': %s", where, p->pattern, error); | |
232 | } | |
233 | ||
543f1c0c ÆAB |
234 | static int is_fixed(const char *s, size_t len) |
235 | { | |
236 | size_t i; | |
237 | ||
238 | for (i = 0; i < len; i++) { | |
239 | if (is_regex_special(s[i])) | |
240 | return 0; | |
241 | } | |
242 | ||
243 | return 1; | |
244 | } | |
245 | ||
94da9193 | 246 | #ifdef USE_LIBPCRE2 |
c1760352 ÆAB |
247 | #define GREP_PCRE2_DEBUG_MALLOC 0 |
248 | ||
249 | static void *pcre2_malloc(PCRE2_SIZE size, MAYBE_UNUSED void *memory_data) | |
250 | { | |
251 | void *pointer = malloc(size); | |
252 | #if GREP_PCRE2_DEBUG_MALLOC | |
253 | static int count = 1; | |
254 | fprintf(stderr, "PCRE2:%p -> #%02d: alloc(%lu)\n", pointer, count++, size); | |
255 | #endif | |
256 | return pointer; | |
257 | } | |
258 | ||
259 | static void pcre2_free(void *pointer, MAYBE_UNUSED void *memory_data) | |
260 | { | |
261 | #if GREP_PCRE2_DEBUG_MALLOC | |
262 | static int count = 1; | |
263 | if (pointer) | |
264 | fprintf(stderr, "PCRE2:%p -> #%02d: free()\n", pointer, count++); | |
265 | #endif | |
266 | free(pointer); | |
267 | } | |
268 | ||
50b6ad55 MK |
269 | static int pcre2_jit_functional(void) |
270 | { | |
271 | static int jit_working = -1; | |
272 | pcre2_code *code; | |
273 | size_t off; | |
274 | int err; | |
275 | ||
276 | if (jit_working != -1) | |
277 | return jit_working; | |
278 | ||
279 | /* | |
280 | * Try to JIT compile a simple pattern to probe if the JIT is | |
281 | * working in general. It might fail for systems where creating | |
282 | * memory mappings for runtime code generation is restricted. | |
283 | */ | |
284 | code = pcre2_compile((PCRE2_SPTR)".", 1, 0, &err, &off, NULL); | |
285 | if (!code) | |
286 | return 0; | |
287 | ||
288 | jit_working = pcre2_jit_compile(code, PCRE2_JIT_COMPLETE) == 0; | |
289 | pcre2_code_free(code); | |
290 | ||
291 | return jit_working; | |
292 | } | |
293 | ||
94da9193 ÆAB |
294 | static void compile_pcre2_pattern(struct grep_pat *p, const struct grep_opt *opt) |
295 | { | |
296 | int error; | |
297 | PCRE2_UCHAR errbuf[256]; | |
298 | PCRE2_SIZE erroffset; | |
299 | int options = PCRE2_MULTILINE; | |
94da9193 | 300 | int jitret; |
a25b9085 ÆAB |
301 | int patinforet; |
302 | size_t jitsizearg; | |
32e3e8bc | 303 | int literal = !opt->ignore_case && (p->fixed || p->is_fixed); |
94da9193 | 304 | |
cbe81e65 ÆAB |
305 | /* |
306 | * Call pcre2_general_context_create() before calling any | |
307 | * other pcre2_*(). It sets up our malloc()/free() functions | |
308 | * with which everything else is allocated. | |
309 | */ | |
310 | p->pcre2_general_context = pcre2_general_context_create( | |
311 | pcre2_malloc, pcre2_free, NULL); | |
312 | if (!p->pcre2_general_context) | |
313 | die("Couldn't allocate PCRE2 general context"); | |
94da9193 ÆAB |
314 | |
315 | if (opt->ignore_case) { | |
44570188 | 316 | if (!opt->ignore_locale && has_non_ascii(p->pattern)) { |
cbe81e65 ÆAB |
317 | p->pcre2_tables = pcre2_maketables(p->pcre2_general_context); |
318 | p->pcre2_compile_context = pcre2_compile_context_create(p->pcre2_general_context); | |
10da030a CMAB |
319 | pcre2_set_character_tables(p->pcre2_compile_context, |
320 | p->pcre2_tables); | |
94da9193 ÆAB |
321 | } |
322 | options |= PCRE2_CASELESS; | |
323 | } | |
32e3e8bc | 324 | if (!opt->ignore_locale && is_utf8_locale() && !literal) |
acabd204 | 325 | options |= (PCRE2_UTF | PCRE2_UCP | PCRE2_MATCH_INVALID_UTF); |
95ca1f98 | 326 | |
14b9a044 MK |
327 | #ifndef GIT_PCRE2_VERSION_10_35_OR_HIGHER |
328 | /* | |
329 | * Work around a JIT bug related to invalid Unicode character handling | |
330 | * fixed in 10.35: | |
331 | * https://github.com/PCRE2Project/pcre2/commit/c21bd977547d | |
332 | */ | |
333 | options &= ~PCRE2_UCP; | |
334 | #endif | |
335 | ||
97169fc3 | 336 | #ifndef GIT_PCRE2_VERSION_10_36_OR_HIGHER |
95ca1f98 | 337 | /* Work around https://bugs.exim.org/show_bug.cgi?id=2642 fixed in 10.36 */ |
797c3599 ÆAB |
338 | if (PCRE2_MATCH_INVALID_UTF && options & (PCRE2_UTF | PCRE2_CASELESS)) |
339 | options |= PCRE2_NO_START_OPTIMIZE; | |
340 | #endif | |
94da9193 ÆAB |
341 | |
342 | p->pcre2_pattern = pcre2_compile((PCRE2_SPTR)p->pattern, | |
343 | p->patternlen, options, &error, &erroffset, | |
344 | p->pcre2_compile_context); | |
345 | ||
346 | if (p->pcre2_pattern) { | |
cbe81e65 | 347 | p->pcre2_match_data = pcre2_match_data_create_from_pattern(p->pcre2_pattern, p->pcre2_general_context); |
94da9193 ÆAB |
348 | if (!p->pcre2_match_data) |
349 | die("Couldn't allocate PCRE2 match data"); | |
350 | } else { | |
351 | pcre2_get_error_message(error, errbuf, sizeof(errbuf)); | |
352 | compile_regexp_failed(p, (const char *)&errbuf); | |
353 | } | |
354 | ||
355 | pcre2_config(PCRE2_CONFIG_JIT, &p->pcre2_jit_on); | |
04bef50c | 356 | if (p->pcre2_jit_on) { |
94da9193 | 357 | jitret = pcre2_jit_compile(p->pcre2_pattern, PCRE2_JIT_COMPLETE); |
50b6ad55 MK |
358 | if (jitret == PCRE2_ERROR_NOMEMORY && !pcre2_jit_functional()) { |
359 | /* | |
360 | * Even though pcre2_config(PCRE2_CONFIG_JIT, ...) | |
361 | * indicated JIT support, the library might still | |
362 | * fail to generate JIT code for various reasons, | |
363 | * e.g. when SELinux's 'deny_execmem' or PaX's | |
364 | * MPROTECT prevent creating W|X memory mappings. | |
365 | * | |
366 | * Instead of faling hard, fall back to interpreter | |
367 | * mode, just as if the pattern was prefixed with | |
368 | * '(*NO_JIT)'. | |
369 | */ | |
370 | p->pcre2_jit_on = 0; | |
371 | return; | |
372 | } else if (jitret) { | |
373 | int need_clip = p->patternlen > 64; | |
374 | int clip_len = need_clip ? 64 : p->patternlen; | |
375 | die("Couldn't JIT the PCRE2 pattern '%.*s'%s, got '%d'%s", | |
376 | clip_len, p->pattern, need_clip ? "..." : "", jitret, | |
377 | pcre2_jit_functional() | |
378 | ? "\nPerhaps prefix (*NO_JIT) to your pattern?" | |
379 | : ""); | |
380 | } | |
a25b9085 ÆAB |
381 | |
382 | /* | |
383 | * The pcre2_config(PCRE2_CONFIG_JIT, ...) call just | |
384 | * tells us whether the library itself supports JIT, | |
385 | * but to see whether we're going to be actually using | |
386 | * JIT we need to extract PCRE2_INFO_JITSIZE from the | |
387 | * pattern *after* we do pcre2_jit_compile() above. | |
388 | * | |
389 | * This is because if the pattern contains the | |
390 | * (*NO_JIT) verb (see pcre2syntax(3)) | |
391 | * pcre2_jit_compile() will exit early with 0. If we | |
392 | * then proceed to call pcre2_jit_match() further down | |
393 | * the line instead of pcre2_match() we'll either | |
394 | * segfault (pre PCRE 10.31) or run into a fatal error | |
395 | * (post PCRE2 10.31) | |
396 | */ | |
397 | patinforet = pcre2_pattern_info(p->pcre2_pattern, PCRE2_INFO_JITSIZE, &jitsizearg); | |
398 | if (patinforet) | |
399 | BUG("pcre2_pattern_info() failed: %d", patinforet); | |
400 | if (jitsizearg == 0) { | |
401 | p->pcre2_jit_on = 0; | |
402 | return; | |
403 | } | |
94da9193 ÆAB |
404 | } |
405 | } | |
406 | ||
407 | static int pcre2match(struct grep_pat *p, const char *line, const char *eol, | |
408 | regmatch_t *match, int eflags) | |
409 | { | |
410 | int ret, flags = 0; | |
411 | PCRE2_SIZE *ovector; | |
412 | PCRE2_UCHAR errbuf[256]; | |
413 | ||
414 | if (eflags & REG_NOTBOL) | |
415 | flags |= PCRE2_NOTBOL; | |
416 | ||
417 | if (p->pcre2_jit_on) | |
418 | ret = pcre2_jit_match(p->pcre2_pattern, (unsigned char *)line, | |
419 | eol - line, 0, flags, p->pcre2_match_data, | |
420 | NULL); | |
421 | else | |
422 | ret = pcre2_match(p->pcre2_pattern, (unsigned char *)line, | |
423 | eol - line, 0, flags, p->pcre2_match_data, | |
424 | NULL); | |
425 | ||
426 | if (ret < 0 && ret != PCRE2_ERROR_NOMATCH) { | |
427 | pcre2_get_error_message(ret, errbuf, sizeof(errbuf)); | |
428 | die("%s failed with error code %d: %s", | |
429 | (p->pcre2_jit_on ? "pcre2_jit_match" : "pcre2_match"), ret, | |
430 | errbuf); | |
431 | } | |
432 | if (ret > 0) { | |
433 | ovector = pcre2_get_ovector_pointer(p->pcre2_match_data); | |
434 | ret = 0; | |
435 | match->rm_so = (int)ovector[0]; | |
436 | match->rm_eo = (int)ovector[1]; | |
437 | } | |
438 | ||
439 | return ret; | |
440 | } | |
441 | ||
442 | static void free_pcre2_pattern(struct grep_pat *p) | |
443 | { | |
444 | pcre2_compile_context_free(p->pcre2_compile_context); | |
445 | pcre2_code_free(p->pcre2_pattern); | |
446 | pcre2_match_data_free(p->pcre2_match_data); | |
b76bf27f | 447 | #ifdef GIT_PCRE2_VERSION_10_34_OR_HIGHER |
cbe81e65 | 448 | pcre2_maketables_free(p->pcre2_general_context, p->pcre2_tables); |
b76bf27f | 449 | #else |
10da030a | 450 | free((void *)p->pcre2_tables); |
b76bf27f | 451 | #endif |
cbe81e65 | 452 | pcre2_general_context_free(p->pcre2_general_context); |
94da9193 ÆAB |
453 | } |
454 | #else /* !USE_LIBPCRE2 */ | |
4548b014 JK |
455 | static void compile_pcre2_pattern(struct grep_pat *p UNUSED, |
456 | const struct grep_opt *opt UNUSED) | |
94da9193 | 457 | { |
94da9193 ÆAB |
458 | die("cannot use Perl-compatible regexes when not compiled with USE_LIBPCRE"); |
459 | } | |
460 | ||
4548b014 JK |
461 | static int pcre2match(struct grep_pat *p UNUSED, const char *line UNUSED, |
462 | const char *eol UNUSED, regmatch_t *match UNUSED, | |
463 | int eflags UNUSED) | |
94da9193 ÆAB |
464 | { |
465 | return 1; | |
466 | } | |
467 | ||
4548b014 | 468 | static void free_pcre2_pattern(struct grep_pat *p UNUSED) |
94da9193 ÆAB |
469 | { |
470 | } | |
94da9193 | 471 | |
793dc676 NTND |
472 | static void compile_fixed_regexp(struct grep_pat *p, struct grep_opt *opt) |
473 | { | |
474 | struct strbuf sb = STRBUF_INIT; | |
475 | int err; | |
1ceababc | 476 | int regflags = 0; |
793dc676 NTND |
477 | |
478 | basic_regex_quote_buf(&sb, p->pattern); | |
793dc676 NTND |
479 | if (opt->ignore_case) |
480 | regflags |= REG_ICASE; | |
481 | err = regcomp(&p->regexp, sb.buf, regflags); | |
793dc676 NTND |
482 | strbuf_release(&sb); |
483 | if (err) { | |
484 | char errbuf[1024]; | |
485 | regerror(err, &p->regexp, errbuf, sizeof(errbuf)); | |
793dc676 NTND |
486 | compile_regexp_failed(p, errbuf); |
487 | } | |
488 | } | |
b65abcaf | 489 | #endif /* !USE_LIBPCRE2 */ |
793dc676 | 490 | |
83b5d2f5 JH |
491 | static void compile_regexp(struct grep_pat *p, struct grep_opt *opt) |
492 | { | |
c822255c | 493 | int err; |
07a3d411 | 494 | int regflags = REG_NEWLINE; |
c822255c | 495 | |
04bf052e ÆAB |
496 | if (opt->pattern_type_option == GREP_PATTERN_TYPE_UNSPECIFIED) |
497 | opt->pattern_type_option = (opt->extended_regexp_option | |
498 | ? GREP_PATTERN_TYPE_ERE | |
499 | : GREP_PATTERN_TYPE_BRE); | |
500 | ||
d7eb527d | 501 | p->word_regexp = opt->word_regexp; |
5183bf67 | 502 | p->ignore_case = opt->ignore_case; |
04bf052e | 503 | p->fixed = opt->pattern_type_option == GREP_PATTERN_TYPE_FIXED; |
d7eb527d | 504 | |
04bf052e | 505 | if (opt->pattern_type_option != GREP_PATTERN_TYPE_PCRE && |
ae807d77 | 506 | memchr(p->pattern, 0, p->patternlen)) |
45d1f37c ÆAB |
507 | die(_("given pattern contains NULL byte (via -f <file>). This is only supported with -P under PCRE v2")); |
508 | ||
09872f64 | 509 | p->is_fixed = is_fixed(p->pattern, p->patternlen); |
8a599983 ÆAB |
510 | #ifdef USE_LIBPCRE2 |
511 | if (!p->fixed && !p->is_fixed) { | |
512 | const char *no_jit = "(*NO_JIT)"; | |
513 | const int no_jit_len = strlen(no_jit); | |
514 | if (starts_with(p->pattern, no_jit) && | |
515 | is_fixed(p->pattern + no_jit_len, | |
516 | p->patternlen - no_jit_len)) | |
517 | p->is_fixed = 1; | |
518 | } | |
519 | #endif | |
09872f64 | 520 | if (p->fixed || p->is_fixed) { |
b65abcaf | 521 | #ifdef USE_LIBPCRE2 |
09872f64 | 522 | if (p->is_fixed) { |
b65abcaf ÆAB |
523 | compile_pcre2_pattern(p, opt); |
524 | } else { | |
525 | /* | |
526 | * E.g. t7811-grep-open.sh relies on the | |
527 | * pattern being restored. | |
528 | */ | |
529 | char *old_pattern = p->pattern; | |
530 | size_t old_patternlen = p->patternlen; | |
531 | struct strbuf sb = STRBUF_INIT; | |
532 | ||
533 | /* | |
534 | * There is the PCRE2_LITERAL flag, but it's | |
535 | * only in PCRE v2 10.30 and later. Needing to | |
536 | * ifdef our way around that and dealing with | |
537 | * it + PCRE2_MULTILINE being an error is more | |
538 | * complex than just quoting this ourselves. | |
539 | */ | |
540 | strbuf_add(&sb, "\\Q", 2); | |
541 | strbuf_add(&sb, p->pattern, p->patternlen); | |
542 | strbuf_add(&sb, "\\E", 2); | |
543 | ||
544 | p->pattern = sb.buf; | |
545 | p->patternlen = sb.len; | |
546 | compile_pcre2_pattern(p, opt); | |
547 | p->pattern = old_pattern; | |
548 | p->patternlen = old_patternlen; | |
549 | strbuf_release(&sb); | |
550 | } | |
551 | #else /* !USE_LIBPCRE2 */ | |
793dc676 | 552 | compile_fixed_regexp(p, opt); |
b65abcaf | 553 | #endif /* !USE_LIBPCRE2 */ |
793dc676 | 554 | return; |
9eceddee | 555 | } |
c822255c | 556 | |
04bf052e | 557 | if (opt->pattern_type_option == GREP_PATTERN_TYPE_PCRE) { |
94da9193 ÆAB |
558 | compile_pcre2_pattern(p, opt); |
559 | return; | |
560 | } | |
561 | ||
07a3d411 ÆAB |
562 | if (p->ignore_case) |
563 | regflags |= REG_ICASE; | |
04bf052e | 564 | if (opt->pattern_type_option == GREP_PATTERN_TYPE_ERE) |
07a3d411 ÆAB |
565 | regflags |= REG_EXTENDED; |
566 | err = regcomp(&p->regexp, p->pattern, regflags); | |
83b5d2f5 JH |
567 | if (err) { |
568 | char errbuf[1024]; | |
83b5d2f5 | 569 | regerror(err, &p->regexp, errbuf, 1024); |
a30c148a | 570 | compile_regexp_failed(p, errbuf); |
83b5d2f5 JH |
571 | } |
572 | } | |
573 | ||
e2b15427 RS |
574 | static struct grep_expr *grep_not_expr(struct grep_expr *expr) |
575 | { | |
576 | struct grep_expr *z = xcalloc(1, sizeof(*z)); | |
577 | z->node = GREP_NODE_NOT; | |
578 | z->u.unary = expr; | |
579 | return z; | |
580 | } | |
581 | ||
f2d27598 TB |
582 | static struct grep_expr *grep_binexp(enum grep_expr_node kind, |
583 | struct grep_expr *left, | |
584 | struct grep_expr *right) | |
9dbf00ba RS |
585 | { |
586 | struct grep_expr *z = xcalloc(1, sizeof(*z)); | |
f2d27598 | 587 | z->node = kind; |
9dbf00ba RS |
588 | z->u.binary.left = left; |
589 | z->u.binary.right = right; | |
590 | return z; | |
591 | } | |
592 | ||
f2d27598 TB |
593 | static struct grep_expr *grep_or_expr(struct grep_expr *left, struct grep_expr *right) |
594 | { | |
595 | return grep_binexp(GREP_NODE_OR, left, right); | |
596 | } | |
597 | ||
0a6adc26 TB |
598 | static struct grep_expr *grep_and_expr(struct grep_expr *left, struct grep_expr *right) |
599 | { | |
600 | return grep_binexp(GREP_NODE_AND, left, right); | |
601 | } | |
602 | ||
0ab7befa | 603 | static struct grep_expr *compile_pattern_or(struct grep_pat **); |
83b5d2f5 JH |
604 | static struct grep_expr *compile_pattern_atom(struct grep_pat **list) |
605 | { | |
606 | struct grep_pat *p; | |
607 | struct grep_expr *x; | |
608 | ||
609 | p = *list; | |
c922b01f LT |
610 | if (!p) |
611 | return NULL; | |
83b5d2f5 JH |
612 | switch (p->token) { |
613 | case GREP_PATTERN: /* atom */ | |
480c1ca6 JH |
614 | case GREP_PATTERN_HEAD: |
615 | case GREP_PATTERN_BODY: | |
ca56dadb | 616 | CALLOC_ARRAY(x, 1); |
83b5d2f5 JH |
617 | x->node = GREP_NODE_ATOM; |
618 | x->u.atom = p; | |
619 | *list = p->next; | |
620 | return x; | |
621 | case GREP_OPEN_PAREN: | |
622 | *list = p->next; | |
0ab7befa | 623 | x = compile_pattern_or(list); |
83b5d2f5 JH |
624 | if (!*list || (*list)->token != GREP_CLOSE_PAREN) |
625 | die("unmatched parenthesis"); | |
626 | *list = (*list)->next; | |
627 | return x; | |
628 | default: | |
629 | return NULL; | |
630 | } | |
631 | } | |
632 | ||
633 | static struct grep_expr *compile_pattern_not(struct grep_pat **list) | |
634 | { | |
635 | struct grep_pat *p; | |
636 | struct grep_expr *x; | |
637 | ||
638 | p = *list; | |
c922b01f LT |
639 | if (!p) |
640 | return NULL; | |
83b5d2f5 JH |
641 | switch (p->token) { |
642 | case GREP_NOT: | |
643 | if (!p->next) | |
644 | die("--not not followed by pattern expression"); | |
645 | *list = p->next; | |
e2b15427 RS |
646 | x = compile_pattern_not(list); |
647 | if (!x) | |
83b5d2f5 | 648 | die("--not followed by non pattern expression"); |
e2b15427 | 649 | return grep_not_expr(x); |
83b5d2f5 JH |
650 | default: |
651 | return compile_pattern_atom(list); | |
652 | } | |
653 | } | |
654 | ||
655 | static struct grep_expr *compile_pattern_and(struct grep_pat **list) | |
656 | { | |
657 | struct grep_pat *p; | |
0a6adc26 | 658 | struct grep_expr *x, *y; |
83b5d2f5 JH |
659 | |
660 | x = compile_pattern_not(list); | |
661 | p = *list; | |
662 | if (p && p->token == GREP_AND) { | |
fe7fe62d RS |
663 | if (!x) |
664 | die("--and not preceded by pattern expression"); | |
83b5d2f5 JH |
665 | if (!p->next) |
666 | die("--and not followed by pattern expression"); | |
667 | *list = p->next; | |
668 | y = compile_pattern_and(list); | |
669 | if (!y) | |
670 | die("--and not followed by pattern expression"); | |
0a6adc26 | 671 | return grep_and_expr(x, y); |
83b5d2f5 JH |
672 | } |
673 | return x; | |
674 | } | |
675 | ||
676 | static struct grep_expr *compile_pattern_or(struct grep_pat **list) | |
677 | { | |
678 | struct grep_pat *p; | |
9dbf00ba | 679 | struct grep_expr *x, *y; |
83b5d2f5 JH |
680 | |
681 | x = compile_pattern_and(list); | |
682 | p = *list; | |
683 | if (x && p && p->token != GREP_CLOSE_PAREN) { | |
684 | y = compile_pattern_or(list); | |
685 | if (!y) | |
686 | die("not a pattern expression %s", p->pattern); | |
9dbf00ba | 687 | return grep_or_expr(x, y); |
83b5d2f5 JH |
688 | } |
689 | return x; | |
690 | } | |
691 | ||
692 | static struct grep_expr *compile_pattern_expr(struct grep_pat **list) | |
693 | { | |
694 | return compile_pattern_or(list); | |
695 | } | |
696 | ||
5aaeb733 JH |
697 | static struct grep_expr *grep_true_expr(void) |
698 | { | |
699 | struct grep_expr *z = xcalloc(1, sizeof(*z)); | |
700 | z->node = GREP_NODE_TRUE; | |
701 | return z; | |
702 | } | |
703 | ||
95ce9ce2 | 704 | static struct grep_expr *prep_header_patterns(struct grep_opt *opt) |
83b5d2f5 JH |
705 | { |
706 | struct grep_pat *p; | |
95ce9ce2 | 707 | struct grep_expr *header_expr; |
5aaeb733 JH |
708 | struct grep_expr *(header_group[GREP_HEADER_FIELD_MAX]); |
709 | enum grep_header_field fld; | |
83b5d2f5 | 710 | |
95ce9ce2 JH |
711 | if (!opt->header_list) |
712 | return NULL; | |
2385f246 | 713 | |
95ce9ce2 JH |
714 | for (p = opt->header_list; p; p = p->next) { |
715 | if (p->token != GREP_PATTERN_HEAD) | |
033abf97 | 716 | BUG("a non-header pattern in grep header list."); |
3ce3ffb8 AP |
717 | if (p->field < GREP_HEADER_FIELD_MIN || |
718 | GREP_HEADER_FIELD_MAX <= p->field) | |
033abf97 | 719 | BUG("unknown header field %d", p->field); |
95ce9ce2 | 720 | compile_regexp(p, opt); |
80235ba7 | 721 | } |
5aaeb733 JH |
722 | |
723 | for (fld = 0; fld < GREP_HEADER_FIELD_MAX; fld++) | |
724 | header_group[fld] = NULL; | |
725 | ||
726 | for (p = opt->header_list; p; p = p->next) { | |
727 | struct grep_expr *h; | |
728 | struct grep_pat *pp = p; | |
729 | ||
730 | h = compile_pattern_atom(&pp); | |
731 | if (!h || pp != p->next) | |
033abf97 | 732 | BUG("malformed header expr"); |
5aaeb733 JH |
733 | if (!header_group[p->field]) { |
734 | header_group[p->field] = h; | |
735 | continue; | |
736 | } | |
737 | header_group[p->field] = grep_or_expr(h, header_group[p->field]); | |
738 | } | |
739 | ||
740 | header_expr = NULL; | |
741 | ||
742 | for (fld = 0; fld < GREP_HEADER_FIELD_MAX; fld++) { | |
743 | if (!header_group[fld]) | |
744 | continue; | |
745 | if (!header_expr) | |
746 | header_expr = grep_true_expr(); | |
747 | header_expr = grep_or_expr(header_group[fld], header_expr); | |
748 | } | |
95ce9ce2 JH |
749 | return header_expr; |
750 | } | |
751 | ||
13e4fc7e JH |
752 | static struct grep_expr *grep_splice_or(struct grep_expr *x, struct grep_expr *y) |
753 | { | |
754 | struct grep_expr *z = x; | |
755 | ||
756 | while (x) { | |
757 | assert(x->node == GREP_NODE_OR); | |
758 | if (x->u.binary.right && | |
759 | x->u.binary.right->node == GREP_NODE_TRUE) { | |
760 | x->u.binary.right = y; | |
761 | break; | |
762 | } | |
763 | x = x->u.binary.right; | |
764 | } | |
765 | return z; | |
766 | } | |
767 | ||
15c96497 | 768 | void compile_grep_patterns(struct grep_opt *opt) |
95ce9ce2 JH |
769 | { |
770 | struct grep_pat *p; | |
771 | struct grep_expr *header_expr = prep_header_patterns(opt); | |
db84376f | 772 | int extended = 0; |
0ab7befa | 773 | |
83b5d2f5 | 774 | for (p = opt->pattern_list; p; p = p->next) { |
480c1ca6 JH |
775 | switch (p->token) { |
776 | case GREP_PATTERN: /* atom */ | |
777 | case GREP_PATTERN_HEAD: | |
778 | case GREP_PATTERN_BODY: | |
c822255c | 779 | compile_regexp(p, opt); |
480c1ca6 JH |
780 | break; |
781 | default: | |
db84376f | 782 | extended = 1; |
480c1ca6 JH |
783 | break; |
784 | } | |
83b5d2f5 JH |
785 | } |
786 | ||
794c0002 | 787 | if (opt->all_match || opt->no_body_match || header_expr) |
db84376f ÆAB |
788 | extended = 1; |
789 | else if (!extended) | |
83b5d2f5 JH |
790 | return; |
791 | ||
83b5d2f5 | 792 | p = opt->pattern_list; |
ba150a3f MB |
793 | if (p) |
794 | opt->pattern_expression = compile_pattern_expr(&p); | |
83b5d2f5 JH |
795 | if (p) |
796 | die("incomplete pattern expression: %s", p->pattern); | |
80235ba7 | 797 | |
794c0002 RS |
798 | if (opt->no_body_match && opt->pattern_expression) |
799 | opt->pattern_expression = grep_not_expr(opt->pattern_expression); | |
800 | ||
80235ba7 JH |
801 | if (!header_expr) |
802 | return; | |
803 | ||
5aaeb733 | 804 | if (!opt->pattern_expression) |
80235ba7 | 805 | opt->pattern_expression = header_expr; |
13e4fc7e JH |
806 | else if (opt->all_match) |
807 | opt->pattern_expression = grep_splice_or(header_expr, | |
808 | opt->pattern_expression); | |
5aaeb733 JH |
809 | else |
810 | opt->pattern_expression = grep_or_expr(opt->pattern_expression, | |
811 | header_expr); | |
80235ba7 | 812 | opt->all_match = 1; |
83b5d2f5 JH |
813 | } |
814 | ||
b48fb5b6 JH |
815 | static void free_pattern_expr(struct grep_expr *x) |
816 | { | |
817 | switch (x->node) { | |
5aaeb733 | 818 | case GREP_NODE_TRUE: |
b48fb5b6 JH |
819 | case GREP_NODE_ATOM: |
820 | break; | |
821 | case GREP_NODE_NOT: | |
822 | free_pattern_expr(x->u.unary); | |
823 | break; | |
824 | case GREP_NODE_AND: | |
825 | case GREP_NODE_OR: | |
826 | free_pattern_expr(x->u.binary.left); | |
827 | free_pattern_expr(x->u.binary.right); | |
828 | break; | |
829 | } | |
830 | free(x); | |
831 | } | |
832 | ||
891c9965 | 833 | static void free_grep_pat(struct grep_pat *pattern) |
b48fb5b6 JH |
834 | { |
835 | struct grep_pat *p, *n; | |
836 | ||
891c9965 | 837 | for (p = pattern; p; p = n) { |
b48fb5b6 JH |
838 | n = p->next; |
839 | switch (p->token) { | |
840 | case GREP_PATTERN: /* atom */ | |
841 | case GREP_PATTERN_HEAD: | |
842 | case GREP_PATTERN_BODY: | |
7599730b | 843 | if (p->pcre2_pattern) |
94da9193 | 844 | free_pcre2_pattern(p); |
63e7e9d8 MK |
845 | else |
846 | regfree(&p->regexp); | |
526a858a | 847 | free(p->pattern); |
b48fb5b6 JH |
848 | break; |
849 | default: | |
850 | break; | |
851 | } | |
852 | free(p); | |
853 | } | |
891c9965 | 854 | } |
b48fb5b6 | 855 | |
891c9965 ÆAB |
856 | void free_grep_patterns(struct grep_opt *opt) |
857 | { | |
858 | free_grep_pat(opt->pattern_list); | |
fb2ebe72 | 859 | free_grep_pat(opt->header_list); |
891c9965 ÆAB |
860 | |
861 | if (opt->pattern_expression) | |
862 | free_pattern_expr(opt->pattern_expression); | |
b48fb5b6 JH |
863 | } |
864 | ||
1a845fbc | 865 | static const char *end_of_line(const char *cp, unsigned long *left) |
83b5d2f5 JH |
866 | { |
867 | unsigned long l = *left; | |
868 | while (l && *cp != '\n') { | |
869 | l--; | |
870 | cp++; | |
871 | } | |
872 | *left = l; | |
873 | return cp; | |
874 | } | |
875 | ||
876 | static int word_char(char ch) | |
877 | { | |
878 | return isalnum(ch) || ch == '_'; | |
879 | } | |
880 | ||
55f638bd ML |
881 | static void output_color(struct grep_opt *opt, const void *data, size_t size, |
882 | const char *color) | |
883 | { | |
daa0c3d9 | 884 | if (want_color(opt->color) && color && color[0]) { |
55f638bd ML |
885 | opt->output(opt, color, strlen(color)); |
886 | opt->output(opt, data, size); | |
887 | opt->output(opt, GIT_COLOR_RESET, strlen(GIT_COLOR_RESET)); | |
888 | } else | |
889 | opt->output(opt, data, size); | |
890 | } | |
891 | ||
892 | static void output_sep(struct grep_opt *opt, char sign) | |
893 | { | |
894 | if (opt->null_following_name) | |
895 | opt->output(opt, "\0", 1); | |
896 | else | |
fa151dc5 | 897 | output_color(opt, &sign, 1, opt->colors[GREP_COLOR_SEP]); |
55f638bd ML |
898 | } |
899 | ||
83caecca RZ |
900 | static void show_name(struct grep_opt *opt, const char *name) |
901 | { | |
fa151dc5 | 902 | output_color(opt, name, strlen(name), opt->colors[GREP_COLOR_FILENAME]); |
5b594f45 | 903 | opt->output(opt, opt->null_following_name ? "\0" : "\n", 1); |
83caecca RZ |
904 | } |
905 | ||
1a845fbc JK |
906 | static int patmatch(struct grep_pat *p, |
907 | const char *line, const char *eol, | |
97e77784 MK |
908 | regmatch_t *match, int eflags) |
909 | { | |
910 | int hit; | |
911 | ||
7599730b | 912 | if (p->pcre2_pattern) |
94da9193 | 913 | hit = !pcre2match(p, line, eol, match, eflags); |
97e77784 | 914 | else |
b7d36ffc JS |
915 | hit = !regexec_buf(&p->regexp, line, eol - line, 1, match, |
916 | eflags); | |
97e77784 MK |
917 | |
918 | return hit; | |
919 | } | |
920 | ||
1a845fbc | 921 | static void strip_timestamp(const char *bol, const char **eol_p) |
a4d7d2c6 | 922 | { |
1a845fbc | 923 | const char *eol = *eol_p; |
a4d7d2c6 JH |
924 | |
925 | while (bol < --eol) { | |
926 | if (*eol != '>') | |
927 | continue; | |
928 | *eol_p = ++eol; | |
cc8e26ee | 929 | break; |
a4d7d2c6 | 930 | } |
a4d7d2c6 JH |
931 | } |
932 | ||
933 | static struct { | |
934 | const char *field; | |
935 | size_t len; | |
936 | } header_field[] = { | |
937 | { "author ", 7 }, | |
938 | { "committer ", 10 }, | |
72fd13f7 | 939 | { "reflog ", 7 }, |
a4d7d2c6 JH |
940 | }; |
941 | ||
3f566c4e HM |
942 | static int headerless_match_one_pattern(struct grep_pat *p, |
943 | const char *bol, const char *eol, | |
944 | enum grep_context ctx, | |
945 | regmatch_t *pmatch, int eflags) | |
83b5d2f5 JH |
946 | { |
947 | int hit = 0; | |
e701fadb | 948 | const char *start = bol; |
83b5d2f5 | 949 | |
480c1ca6 JH |
950 | if ((p->token != GREP_PATTERN) && |
951 | ((p->token == GREP_PATTERN_HEAD) != (ctx == GREP_CONTEXT_HEAD))) | |
952 | return 0; | |
953 | ||
83b5d2f5 | 954 | again: |
97e77784 | 955 | hit = patmatch(p, bol, eol, pmatch, eflags); |
83b5d2f5 | 956 | |
d7eb527d | 957 | if (hit && p->word_regexp) { |
83b5d2f5 | 958 | if ((pmatch[0].rm_so < 0) || |
84201eae | 959 | (eol - bol) < pmatch[0].rm_so || |
83b5d2f5 JH |
960 | (pmatch[0].rm_eo < 0) || |
961 | (eol - bol) < pmatch[0].rm_eo) | |
962 | die("regexp returned nonsense"); | |
963 | ||
964 | /* Match beginning must be either beginning of the | |
965 | * line, or at word boundary (i.e. the last char must | |
966 | * not be a word char). Similarly, match end must be | |
967 | * either end of the line, or at word boundary | |
968 | * (i.e. the next char must not be a word char). | |
969 | */ | |
fb62eb7f | 970 | if ( ((pmatch[0].rm_so == 0) || |
83b5d2f5 JH |
971 | !word_char(bol[pmatch[0].rm_so-1])) && |
972 | ((pmatch[0].rm_eo == (eol-bol)) || | |
973 | !word_char(bol[pmatch[0].rm_eo])) ) | |
974 | ; | |
975 | else | |
976 | hit = 0; | |
977 | ||
84201eae RS |
978 | /* Words consist of at least one character. */ |
979 | if (pmatch->rm_so == pmatch->rm_eo) | |
980 | hit = 0; | |
981 | ||
83b5d2f5 JH |
982 | if (!hit && pmatch[0].rm_so + bol + 1 < eol) { |
983 | /* There could be more than one match on the | |
984 | * line, and the first match might not be | |
985 | * strict word match. But later ones could be! | |
fb62eb7f RS |
986 | * Forward to the next possible start, i.e. the |
987 | * next position following a non-word char. | |
83b5d2f5 JH |
988 | */ |
989 | bol = pmatch[0].rm_so + bol + 1; | |
fb62eb7f RS |
990 | while (word_char(bol[-1]) && bol < eol) |
991 | bol++; | |
dbb6a4ad | 992 | eflags |= REG_NOTBOL; |
fb62eb7f RS |
993 | if (bol < eol) |
994 | goto again; | |
83b5d2f5 JH |
995 | } |
996 | } | |
e701fadb RS |
997 | if (hit) { |
998 | pmatch[0].rm_so += bol - start; | |
999 | pmatch[0].rm_eo += bol - start; | |
1000 | } | |
83b5d2f5 JH |
1001 | return hit; |
1002 | } | |
1003 | ||
3f566c4e HM |
1004 | static int match_one_pattern(struct grep_pat *p, |
1005 | const char *bol, const char *eol, | |
1006 | enum grep_context ctx, regmatch_t *pmatch, | |
1007 | int eflags) | |
1008 | { | |
1009 | const char *field; | |
1010 | size_t len; | |
1011 | ||
1012 | if (p->token == GREP_PATTERN_HEAD) { | |
1013 | assert(p->field < ARRAY_SIZE(header_field)); | |
1014 | field = header_field[p->field].field; | |
1015 | len = header_field[p->field].len; | |
1016 | if (strncmp(bol, field, len)) | |
1017 | return 0; | |
1018 | bol += len; | |
1019 | ||
1020 | switch (p->field) { | |
1021 | case GREP_HEADER_AUTHOR: | |
1022 | case GREP_HEADER_COMMITTER: | |
1023 | strip_timestamp(bol, &eol); | |
1024 | break; | |
1025 | default: | |
1026 | break; | |
1027 | } | |
1028 | } | |
1029 | ||
1030 | return headerless_match_one_pattern(p, bol, eol, ctx, pmatch, eflags); | |
1031 | } | |
1032 | ||
1033 | ||
1a845fbc JK |
1034 | static int match_expr_eval(struct grep_opt *opt, struct grep_expr *x, |
1035 | const char *bol, const char *eol, | |
1036 | enum grep_context ctx, ssize_t *col, | |
68d686e6 | 1037 | ssize_t *icol, int collect_hits) |
83b5d2f5 | 1038 | { |
0ab7befa JH |
1039 | int h = 0; |
1040 | ||
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 | } | |
794c0002 RS |
1053 | if (x->u.atom->token == GREP_PATTERN_BODY) |
1054 | opt->body_hit |= h; | |
83b5d2f5 JH |
1055 | break; |
1056 | case GREP_NODE_NOT: | |
68d686e6 TB |
1057 | /* |
1058 | * Upon visiting a GREP_NODE_NOT, col and icol become swapped. | |
1059 | */ | |
1060 | h = !match_expr_eval(opt, x->u.unary, bol, eol, ctx, icol, col, | |
1061 | 0); | |
0ab7befa | 1062 | break; |
83b5d2f5 | 1063 | case GREP_NODE_AND: |
017c0fcf | 1064 | h = match_expr_eval(opt, x->u.binary.left, bol, eol, ctx, col, |
68d686e6 | 1065 | icol, 0); |
017c0fcf TB |
1066 | if (h || opt->columnnum) { |
1067 | /* | |
1068 | * Don't short-circuit AND when given --column, since a | |
1069 | * NOT earlier in the tree may turn this into an OR. In | |
1070 | * this case, see the below comment. | |
1071 | */ | |
1072 | h &= match_expr_eval(opt, x->u.binary.right, bol, eol, | |
1073 | ctx, col, icol, 0); | |
1074 | } | |
0ab7befa | 1075 | break; |
83b5d2f5 | 1076 | case GREP_NODE_OR: |
017c0fcf TB |
1077 | if (!(collect_hits || opt->columnnum)) { |
1078 | /* | |
1079 | * Don't short-circuit OR when given --column (or | |
1080 | * collecting hits) to ensure we don't skip a later | |
1081 | * child that would produce an earlier match. | |
1082 | */ | |
68d686e6 TB |
1083 | return (match_expr_eval(opt, x->u.binary.left, bol, eol, |
1084 | ctx, col, icol, 0) || | |
1085 | match_expr_eval(opt, x->u.binary.right, bol, | |
1086 | eol, ctx, col, icol, 0)); | |
017c0fcf | 1087 | } |
68d686e6 TB |
1088 | h = match_expr_eval(opt, x->u.binary.left, bol, eol, ctx, col, |
1089 | icol, 0); | |
017c0fcf TB |
1090 | if (collect_hits) |
1091 | x->u.binary.left->hit |= h; | |
68d686e6 | 1092 | h |= match_expr_eval(opt, x->u.binary.right, bol, eol, ctx, col, |
017c0fcf | 1093 | icol, collect_hits); |
0ab7befa JH |
1094 | break; |
1095 | default: | |
d7530708 | 1096 | die("Unexpected node type (internal error) %d", x->node); |
83b5d2f5 | 1097 | } |
0ab7befa JH |
1098 | if (collect_hits) |
1099 | x->hit |= h; | |
1100 | return h; | |
83b5d2f5 JH |
1101 | } |
1102 | ||
1a845fbc JK |
1103 | static int match_expr(struct grep_opt *opt, |
1104 | const char *bol, const char *eol, | |
68d686e6 TB |
1105 | enum grep_context ctx, ssize_t *col, |
1106 | ssize_t *icol, int collect_hits) | |
83b5d2f5 JH |
1107 | { |
1108 | struct grep_expr *x = opt->pattern_expression; | |
68d686e6 | 1109 | return match_expr_eval(opt, x, bol, eol, ctx, col, icol, collect_hits); |
83b5d2f5 JH |
1110 | } |
1111 | ||
1a845fbc JK |
1112 | static int match_line(struct grep_opt *opt, |
1113 | const char *bol, const char *eol, | |
68d686e6 | 1114 | ssize_t *col, ssize_t *icol, |
0ab7befa | 1115 | enum grep_context ctx, int collect_hits) |
83b5d2f5 JH |
1116 | { |
1117 | struct grep_pat *p; | |
017c0fcf | 1118 | int hit = 0; |
79212772 | 1119 | |
db84376f | 1120 | if (opt->pattern_expression) |
68d686e6 TB |
1121 | return match_expr(opt, bol, eol, ctx, col, icol, |
1122 | collect_hits); | |
0ab7befa JH |
1123 | |
1124 | /* we do not call with collect_hits without being extended */ | |
83b5d2f5 | 1125 | for (p = opt->pattern_list; p; p = p->next) { |
68d686e6 TB |
1126 | regmatch_t tmp; |
1127 | if (match_one_pattern(p, bol, eol, ctx, &tmp, 0)) { | |
017c0fcf TB |
1128 | hit |= 1; |
1129 | if (!opt->columnnum) { | |
1130 | /* | |
1131 | * Without --column, any single match on a line | |
1132 | * is enough to know that it needs to be | |
1133 | * printed. With --column, scan _all_ patterns | |
1134 | * to find the earliest. | |
1135 | */ | |
1136 | break; | |
1137 | } | |
1138 | if (*col < 0 || tmp.rm_so < *col) | |
1139 | *col = tmp.rm_so; | |
68d686e6 | 1140 | } |
83b5d2f5 | 1141 | } |
017c0fcf | 1142 | return hit; |
83b5d2f5 JH |
1143 | } |
1144 | ||
1a845fbc JK |
1145 | static int match_next_pattern(struct grep_pat *p, |
1146 | const char *bol, const char *eol, | |
7e8f59d5 RS |
1147 | enum grep_context ctx, |
1148 | regmatch_t *pmatch, int eflags) | |
1149 | { | |
1150 | regmatch_t match; | |
1151 | ||
3f566c4e | 1152 | if (!headerless_match_one_pattern(p, bol, eol, ctx, &match, eflags)) |
7e8f59d5 RS |
1153 | return 0; |
1154 | if (match.rm_so < 0 || match.rm_eo < 0) | |
1155 | return 0; | |
1156 | if (pmatch->rm_so >= 0 && pmatch->rm_eo >= 0) { | |
1157 | if (match.rm_so > pmatch->rm_so) | |
1158 | return 1; | |
1159 | if (match.rm_so == pmatch->rm_so && match.rm_eo < pmatch->rm_eo) | |
1160 | return 1; | |
1161 | } | |
1162 | pmatch->rm_so = match.rm_so; | |
1163 | pmatch->rm_eo = match.rm_eo; | |
1164 | return 1; | |
1165 | } | |
1166 | ||
3f566c4e HM |
1167 | int grep_next_match(struct grep_opt *opt, |
1168 | const char *bol, const char *eol, | |
1169 | enum grep_context ctx, regmatch_t *pmatch, | |
1170 | enum grep_header_field field, int eflags) | |
7e8f59d5 RS |
1171 | { |
1172 | struct grep_pat *p; | |
1173 | int hit = 0; | |
1174 | ||
1175 | pmatch->rm_so = pmatch->rm_eo = -1; | |
1176 | if (bol < eol) { | |
3f566c4e HM |
1177 | for (p = ((ctx == GREP_CONTEXT_HEAD) |
1178 | ? opt->header_list : opt->pattern_list); | |
1179 | p; p = p->next) { | |
7e8f59d5 | 1180 | switch (p->token) { |
7e8f59d5 | 1181 | case GREP_PATTERN_HEAD: |
3f566c4e HM |
1182 | if ((field != GREP_HEADER_FIELD_MAX) && |
1183 | (p->field != field)) | |
1184 | continue; | |
1185 | /* fall thru */ | |
1186 | case GREP_PATTERN: /* atom */ | |
7e8f59d5 RS |
1187 | case GREP_PATTERN_BODY: |
1188 | hit |= match_next_pattern(p, bol, eol, ctx, | |
1189 | pmatch, eflags); | |
1190 | break; | |
1191 | default: | |
1192 | break; | |
1193 | } | |
1194 | } | |
1195 | } | |
1196 | return hit; | |
1197 | } | |
1198 | ||
c707ded3 TB |
1199 | static void show_line_header(struct grep_opt *opt, const char *name, |
1200 | unsigned lno, ssize_t cno, char sign) | |
7e8f59d5 | 1201 | { |
1d84f72e | 1202 | if (opt->heading && opt->last_shown == 0) { |
fa151dc5 | 1203 | output_color(opt, name, strlen(name), opt->colors[GREP_COLOR_FILENAME]); |
1d84f72e RS |
1204 | opt->output(opt, "\n", 1); |
1205 | } | |
5dd06d38 RS |
1206 | opt->last_shown = lno; |
1207 | ||
1d84f72e | 1208 | if (!opt->heading && opt->pathname) { |
fa151dc5 | 1209 | output_color(opt, name, strlen(name), opt->colors[GREP_COLOR_FILENAME]); |
55f638bd | 1210 | output_sep(opt, sign); |
5b594f45 FK |
1211 | } |
1212 | if (opt->linenum) { | |
1213 | char buf[32]; | |
1a168e5c | 1214 | xsnprintf(buf, sizeof(buf), "%d", lno); |
fa151dc5 | 1215 | output_color(opt, buf, strlen(buf), opt->colors[GREP_COLOR_LINENO]); |
55f638bd | 1216 | output_sep(opt, sign); |
5b594f45 | 1217 | } |
89252cd0 TB |
1218 | /* |
1219 | * Treat 'cno' as the 1-indexed offset from the start of a non-context | |
1220 | * line to its first match. Otherwise, 'cno' is 0 indicating that we are | |
1221 | * being called with a context line. | |
1222 | */ | |
1223 | if (opt->columnnum && cno) { | |
1224 | char buf[32]; | |
1225 | xsnprintf(buf, sizeof(buf), "%"PRIuMAX, (uintmax_t)cno); | |
d036d667 | 1226 | output_color(opt, buf, strlen(buf), opt->colors[GREP_COLOR_COLUMNNO]); |
89252cd0 TB |
1227 | output_sep(opt, sign); |
1228 | } | |
c707ded3 TB |
1229 | } |
1230 | ||
1a845fbc JK |
1231 | static void show_line(struct grep_opt *opt, |
1232 | const char *bol, const char *eol, | |
c707ded3 TB |
1233 | const char *name, unsigned lno, ssize_t cno, char sign) |
1234 | { | |
1235 | int rest = eol - bol; | |
9d8db06e TB |
1236 | const char *match_color = NULL; |
1237 | const char *line_color = NULL; | |
c707ded3 TB |
1238 | |
1239 | if (opt->file_break && opt->last_shown == 0) { | |
1240 | if (opt->show_hunk_mark) | |
1241 | opt->output(opt, "\n", 1); | |
1242 | } else if (opt->pre_context || opt->post_context || opt->funcbody) { | |
1243 | if (opt->last_shown == 0) { | |
1244 | if (opt->show_hunk_mark) { | |
87ece7ce | 1245 | output_color(opt, "--", 2, opt->colors[GREP_COLOR_SEP]); |
c707ded3 TB |
1246 | opt->output(opt, "\n", 1); |
1247 | } | |
1248 | } else if (lno > opt->last_shown + 1) { | |
87ece7ce | 1249 | output_color(opt, "--", 2, opt->colors[GREP_COLOR_SEP]); |
c707ded3 TB |
1250 | opt->output(opt, "\n", 1); |
1251 | } | |
1252 | } | |
9d8db06e TB |
1253 | if (!opt->only_matching) { |
1254 | /* | |
1255 | * In case the line we're being called with contains more than | |
1256 | * one match, leave printing each header to the loop below. | |
1257 | */ | |
1258 | show_line_header(opt, name, lno, cno, sign); | |
1259 | } | |
1260 | if (opt->color || opt->only_matching) { | |
7e8f59d5 RS |
1261 | regmatch_t match; |
1262 | enum grep_context ctx = GREP_CONTEXT_BODY; | |
7e8f59d5 RS |
1263 | int eflags = 0; |
1264 | ||
9d8db06e TB |
1265 | if (opt->color) { |
1266 | if (sign == ':') | |
87ece7ce | 1267 | match_color = opt->colors[GREP_COLOR_MATCH_SELECTED]; |
9d8db06e | 1268 | else |
87ece7ce | 1269 | match_color = opt->colors[GREP_COLOR_MATCH_CONTEXT]; |
9d8db06e | 1270 | if (sign == ':') |
87ece7ce | 1271 | line_color = opt->colors[GREP_COLOR_SELECTED]; |
9d8db06e | 1272 | else if (sign == '-') |
87ece7ce | 1273 | line_color = opt->colors[GREP_COLOR_CONTEXT]; |
9d8db06e | 1274 | else if (sign == '=') |
87ece7ce | 1275 | line_color = opt->colors[GREP_COLOR_FUNCTION]; |
9d8db06e | 1276 | } |
3f566c4e HM |
1277 | while (grep_next_match(opt, bol, eol, ctx, &match, |
1278 | GREP_HEADER_FIELD_MAX, eflags)) { | |
1f5b9cc4 RS |
1279 | if (match.rm_so == match.rm_eo) |
1280 | break; | |
5b594f45 | 1281 | |
9d8db06e TB |
1282 | if (opt->only_matching) |
1283 | show_line_header(opt, name, lno, cno, sign); | |
1284 | else | |
1285 | output_color(opt, bol, match.rm_so, line_color); | |
55f638bd | 1286 | output_color(opt, bol + match.rm_so, |
79a77109 | 1287 | match.rm_eo - match.rm_so, match_color); |
9d8db06e TB |
1288 | if (opt->only_matching) |
1289 | opt->output(opt, "\n", 1); | |
7e8f59d5 | 1290 | bol += match.rm_eo; |
9d8db06e | 1291 | cno += match.rm_eo; |
7e8f59d5 RS |
1292 | rest -= match.rm_eo; |
1293 | eflags = REG_NOTBOL; | |
1294 | } | |
7e8f59d5 | 1295 | } |
9d8db06e TB |
1296 | if (!opt->only_matching) { |
1297 | output_color(opt, bol, rest, line_color); | |
1298 | opt->output(opt, "\n", 1); | |
1299 | } | |
7e8f59d5 RS |
1300 | } |
1301 | ||
78db6ea9 JK |
1302 | int grep_use_locks; |
1303 | ||
0579f91d TR |
1304 | /* |
1305 | * This lock protects access to the gitattributes machinery, which is | |
1306 | * not thread-safe. | |
1307 | */ | |
1308 | pthread_mutex_t grep_attr_mutex; | |
1309 | ||
78db6ea9 | 1310 | static inline void grep_attr_lock(void) |
0579f91d | 1311 | { |
78db6ea9 | 1312 | if (grep_use_locks) |
0579f91d TR |
1313 | pthread_mutex_lock(&grep_attr_mutex); |
1314 | } | |
1315 | ||
78db6ea9 | 1316 | static inline void grep_attr_unlock(void) |
0579f91d | 1317 | { |
78db6ea9 | 1318 | if (grep_use_locks) |
0579f91d TR |
1319 | pthread_mutex_unlock(&grep_attr_mutex); |
1320 | } | |
b3aeb285 | 1321 | |
1a845fbc JK |
1322 | static int match_funcname(struct grep_opt *opt, struct grep_source *gs, |
1323 | const char *bol, const char *eol) | |
2944e4e6 | 1324 | { |
60ecac98 | 1325 | xdemitconf_t *xecfg = opt->priv; |
0579f91d | 1326 | if (xecfg && !xecfg->find_func) { |
acd00ea0 | 1327 | grep_source_load_driver(gs, opt->repo->index); |
94ad9d9e JK |
1328 | if (gs->driver->funcname.pattern) { |
1329 | const struct userdiff_funcname *pe = &gs->driver->funcname; | |
0579f91d TR |
1330 | xdiff_set_find_func(xecfg, pe->pattern, pe->cflags); |
1331 | } else { | |
1332 | xecfg = opt->priv = NULL; | |
1333 | } | |
1334 | } | |
1335 | ||
1336 | if (xecfg) { | |
60ecac98 RS |
1337 | char buf[1]; |
1338 | return xecfg->find_func(bol, eol - bol, buf, 1, | |
1339 | xecfg->find_func_priv) >= 0; | |
1340 | } | |
1341 | ||
2944e4e6 RS |
1342 | if (bol == eol) |
1343 | return 0; | |
1344 | if (isalpha(*bol) || *bol == '_' || *bol == '$') | |
1345 | return 1; | |
1346 | return 0; | |
1347 | } | |
1348 | ||
e1327023 | 1349 | static void show_funcname_line(struct grep_opt *opt, struct grep_source *gs, |
1a845fbc | 1350 | const char *bol, unsigned lno) |
2944e4e6 | 1351 | { |
e1327023 | 1352 | while (bol > gs->buf) { |
1a845fbc | 1353 | const char *eol = --bol; |
2944e4e6 | 1354 | |
e1327023 | 1355 | while (bol > gs->buf && bol[-1] != '\n') |
2944e4e6 RS |
1356 | bol--; |
1357 | lno--; | |
1358 | ||
1359 | if (lno <= opt->last_shown) | |
1360 | break; | |
1361 | ||
e1327023 | 1362 | if (match_funcname(opt, gs, bol, eol)) { |
89252cd0 | 1363 | show_line(opt, bol, eol, gs->name, lno, 0, '='); |
2944e4e6 RS |
1364 | break; |
1365 | } | |
1366 | } | |
1367 | } | |
1368 | ||
a5dc20b0 RS |
1369 | static int is_empty_line(const char *bol, const char *eol); |
1370 | ||
e1327023 | 1371 | static void show_pre_context(struct grep_opt *opt, struct grep_source *gs, |
1a845fbc | 1372 | const char *bol, const char *end, unsigned lno) |
49de3216 | 1373 | { |
6653a01b | 1374 | unsigned cur = lno, from = 1, funcname_lno = 0, orig_from; |
a5dc20b0 | 1375 | int funcname_needed = !!opt->funcname, comment_needed = 0; |
ba8ea749 | 1376 | |
49de3216 RS |
1377 | if (opt->pre_context < lno) |
1378 | from = lno - opt->pre_context; | |
1379 | if (from <= opt->last_shown) | |
1380 | from = opt->last_shown + 1; | |
6653a01b | 1381 | orig_from = from; |
a5dc20b0 RS |
1382 | if (opt->funcbody) { |
1383 | if (match_funcname(opt, gs, bol, end)) | |
1384 | comment_needed = 1; | |
1385 | else | |
1386 | funcname_needed = 1; | |
6653a01b RS |
1387 | from = opt->last_shown + 1; |
1388 | } | |
49de3216 RS |
1389 | |
1390 | /* Rewind. */ | |
6653a01b | 1391 | while (bol > gs->buf && cur > from) { |
1a845fbc JK |
1392 | const char *next_bol = bol; |
1393 | const char *eol = --bol; | |
2944e4e6 | 1394 | |
e1327023 | 1395 | while (bol > gs->buf && bol[-1] != '\n') |
49de3216 RS |
1396 | bol--; |
1397 | cur--; | |
a5dc20b0 RS |
1398 | if (comment_needed && (is_empty_line(bol, eol) || |
1399 | match_funcname(opt, gs, bol, eol))) { | |
1400 | comment_needed = 0; | |
1401 | from = orig_from; | |
1402 | if (cur < from) { | |
1403 | cur++; | |
1404 | bol = next_bol; | |
1405 | break; | |
1406 | } | |
1407 | } | |
e1327023 | 1408 | if (funcname_needed && match_funcname(opt, gs, bol, eol)) { |
2944e4e6 RS |
1409 | funcname_lno = cur; |
1410 | funcname_needed = 0; | |
a5dc20b0 RS |
1411 | if (opt->funcbody) |
1412 | comment_needed = 1; | |
1413 | else | |
1414 | from = orig_from; | |
2944e4e6 | 1415 | } |
49de3216 RS |
1416 | } |
1417 | ||
2944e4e6 RS |
1418 | /* We need to look even further back to find a function signature. */ |
1419 | if (opt->funcname && funcname_needed) | |
e1327023 | 1420 | show_funcname_line(opt, gs, bol, cur); |
2944e4e6 | 1421 | |
49de3216 RS |
1422 | /* Back forward. */ |
1423 | while (cur < lno) { | |
1a845fbc | 1424 | const char *eol = bol, sign = (cur == funcname_lno) ? '=' : '-'; |
49de3216 RS |
1425 | |
1426 | while (*eol != '\n') | |
1427 | eol++; | |
89252cd0 | 1428 | show_line(opt, bol, eol, gs->name, cur, 0, sign); |
49de3216 RS |
1429 | bol = eol + 1; |
1430 | cur++; | |
1431 | } | |
1432 | } | |
1433 | ||
a26345b6 JH |
1434 | static int should_lookahead(struct grep_opt *opt) |
1435 | { | |
1436 | struct grep_pat *p; | |
1437 | ||
db84376f | 1438 | if (opt->pattern_expression) |
a26345b6 JH |
1439 | return 0; /* punt for too complex stuff */ |
1440 | if (opt->invert) | |
1441 | return 0; | |
1442 | for (p = opt->pattern_list; p; p = p->next) { | |
1443 | if (p->token != GREP_PATTERN) | |
1444 | return 0; /* punt for "header only" and stuff */ | |
1445 | } | |
1446 | return 1; | |
1447 | } | |
1448 | ||
1449 | static int look_ahead(struct grep_opt *opt, | |
1450 | unsigned long *left_p, | |
1451 | unsigned *lno_p, | |
1a845fbc | 1452 | const char **bol_p) |
a26345b6 JH |
1453 | { |
1454 | unsigned lno = *lno_p; | |
1a845fbc | 1455 | const char *bol = *bol_p; |
a26345b6 | 1456 | struct grep_pat *p; |
1a845fbc | 1457 | const char *sp, *last_bol; |
a26345b6 JH |
1458 | regoff_t earliest = -1; |
1459 | ||
1460 | for (p = opt->pattern_list; p; p = p->next) { | |
1461 | int hit; | |
1462 | regmatch_t m; | |
1463 | ||
97e77784 | 1464 | hit = patmatch(p, bol, bol + *left_p, &m, 0); |
a26345b6 JH |
1465 | if (!hit || m.rm_so < 0 || m.rm_eo < 0) |
1466 | continue; | |
1467 | if (earliest < 0 || m.rm_so < earliest) | |
1468 | earliest = m.rm_so; | |
1469 | } | |
1470 | ||
1471 | if (earliest < 0) { | |
1472 | *bol_p = bol + *left_p; | |
1473 | *left_p = 0; | |
1474 | return 1; | |
1475 | } | |
1476 | for (sp = bol + earliest; bol < sp && sp[-1] != '\n'; sp--) | |
1477 | ; /* find the beginning of the line */ | |
1478 | last_bol = sp; | |
1479 | ||
1480 | for (sp = bol; sp < last_bol; sp++) { | |
1481 | if (*sp == '\n') | |
1482 | lno++; | |
1483 | } | |
1484 | *left_p -= last_bol - bol; | |
1485 | *bol_p = last_bol; | |
1486 | *lno_p = lno; | |
1487 | return 0; | |
1488 | } | |
1489 | ||
38bbc2ea NTND |
1490 | static int fill_textconv_grep(struct repository *r, |
1491 | struct userdiff_driver *driver, | |
335ec3bf JK |
1492 | struct grep_source *gs) |
1493 | { | |
1494 | struct diff_filespec *df; | |
1495 | char *buf; | |
1496 | size_t size; | |
1497 | ||
1498 | if (!driver || !driver->textconv) | |
1499 | return grep_source_load(gs); | |
1500 | ||
1501 | /* | |
1502 | * The textconv interface is intimately tied to diff_filespecs, so we | |
1503 | * have to pretend to be one. If we could unify the grep_source | |
1504 | * and diff_filespec structs, this mess could just go away. | |
1505 | */ | |
1506 | df = alloc_filespec(gs->path); | |
1507 | switch (gs->type) { | |
1c41c82b | 1508 | case GREP_SOURCE_OID: |
335ec3bf JK |
1509 | fill_filespec(df, gs->identifier, 1, 0100644); |
1510 | break; | |
1511 | case GREP_SOURCE_FILE: | |
14228447 | 1512 | fill_filespec(df, null_oid(), 0, 0100644); |
335ec3bf JK |
1513 | break; |
1514 | default: | |
033abf97 | 1515 | BUG("attempt to textconv something without a path?"); |
335ec3bf JK |
1516 | } |
1517 | ||
1518 | /* | |
1d1729ca MT |
1519 | * fill_textconv is not remotely thread-safe; it modifies the global |
1520 | * diff tempfile structure, writes to the_repo's odb and might | |
1521 | * internally call thread-unsafe functions such as the | |
1522 | * prepare_packed_git() lazy-initializator. Because of the last two, we | |
1523 | * must ensure mutual exclusion between this call and the object reading | |
1524 | * API, thus we use obj_read_lock() here. | |
1525 | * | |
1526 | * TODO: allowing text conversion to run in parallel with object | |
1527 | * reading operations might increase performance in the multithreaded | |
1528 | * non-worktreee git-grep with --textconv. | |
335ec3bf | 1529 | */ |
1d1729ca | 1530 | obj_read_lock(); |
38bbc2ea | 1531 | size = fill_textconv(r, driver, df, &buf); |
1d1729ca | 1532 | obj_read_unlock(); |
335ec3bf JK |
1533 | free_filespec(df); |
1534 | ||
1535 | /* | |
1536 | * The normal fill_textconv usage by the diff machinery would just keep | |
1537 | * the textconv'd buf separate from the diff_filespec. But much of the | |
1538 | * grep code passes around a grep_source and assumes that its "buf" | |
1539 | * pointer is the beginning of the thing we are searching. So let's | |
1540 | * install our textconv'd version into the grep_source, taking care not | |
1541 | * to leak any existing buffer. | |
1542 | */ | |
1543 | grep_source_clear_data(gs); | |
1544 | gs->buf = buf; | |
1545 | gs->size = size; | |
1546 | ||
1547 | return 0; | |
1548 | } | |
1549 | ||
4aa2c475 RS |
1550 | static int is_empty_line(const char *bol, const char *eol) |
1551 | { | |
1552 | while (bol < eol && isspace(*bol)) | |
1553 | bol++; | |
1554 | return bol == eol; | |
1555 | } | |
1556 | ||
e1327023 | 1557 | static int grep_source_1(struct grep_opt *opt, struct grep_source *gs, int collect_hits) |
83b5d2f5 | 1558 | { |
1a845fbc JK |
1559 | const char *bol; |
1560 | const char *peek_bol = NULL; | |
e1327023 | 1561 | unsigned long left; |
83b5d2f5 | 1562 | unsigned lno = 1; |
83b5d2f5 | 1563 | unsigned last_hit = 0; |
83b5d2f5 | 1564 | int binary_match_only = 0; |
83b5d2f5 | 1565 | unsigned count = 0; |
a26345b6 | 1566 | int try_lookahead = 0; |
ba8ea749 | 1567 | int show_function = 0; |
335ec3bf | 1568 | struct userdiff_driver *textconv = NULL; |
480c1ca6 | 1569 | enum grep_context ctx = GREP_CONTEXT_HEAD; |
60ecac98 | 1570 | xdemitconf_t xecfg; |
83b5d2f5 | 1571 | |
de99eb0c ES |
1572 | if (!opt->status_only && gs->name == NULL) |
1573 | BUG("grep call which could print a name requires " | |
1574 | "grep_source.name be non-NULL"); | |
1575 | ||
5b594f45 FK |
1576 | if (!opt->output) |
1577 | opt->output = std_output; | |
1578 | ||
ba8ea749 RS |
1579 | if (opt->pre_context || opt->post_context || opt->file_break || |
1580 | opt->funcbody) { | |
08303c36 RS |
1581 | /* Show hunk marks, except for the first file. */ |
1582 | if (opt->last_shown) | |
1583 | opt->show_hunk_mark = 1; | |
1584 | /* | |
1585 | * If we're using threads then we can't easily identify | |
1586 | * the first file. Always put hunk marks in that case | |
1587 | * and skip the very first one later in work_done(). | |
1588 | */ | |
1589 | if (opt->output != std_output) | |
1590 | opt->show_hunk_mark = 1; | |
1591 | } | |
431d6e7b RS |
1592 | opt->last_shown = 0; |
1593 | ||
335ec3bf | 1594 | if (opt->allow_textconv) { |
acd00ea0 | 1595 | grep_source_load_driver(gs, opt->repo->index); |
335ec3bf JK |
1596 | /* |
1597 | * We might set up the shared textconv cache data here, which | |
1d1729ca MT |
1598 | * is not thread-safe. Also, get_oid_with_context() and |
1599 | * parse_object() might be internally called. As they are not | |
84544f2e | 1600 | * currently thread-safe and might be racy with object reading, |
1d1729ca | 1601 | * obj_read_lock() must be called. |
335ec3bf JK |
1602 | */ |
1603 | grep_attr_lock(); | |
1d1729ca | 1604 | obj_read_lock(); |
bd7ad45b | 1605 | textconv = userdiff_get_textconv(opt->repo, gs->driver); |
1d1729ca | 1606 | obj_read_unlock(); |
335ec3bf JK |
1607 | grep_attr_unlock(); |
1608 | } | |
1609 | ||
1610 | /* | |
1611 | * We know the result of a textconv is text, so we only have to care | |
1612 | * about binary handling if we are not using it. | |
1613 | */ | |
1614 | if (!textconv) { | |
1615 | switch (opt->binary) { | |
1616 | case GREP_BINARY_DEFAULT: | |
acd00ea0 | 1617 | if (grep_source_is_binary(gs, opt->repo->index)) |
335ec3bf JK |
1618 | binary_match_only = 1; |
1619 | break; | |
1620 | case GREP_BINARY_NOMATCH: | |
acd00ea0 | 1621 | if (grep_source_is_binary(gs, opt->repo->index)) |
335ec3bf JK |
1622 | return 0; /* Assume unmatch */ |
1623 | break; | |
1624 | case GREP_BINARY_TEXT: | |
1625 | break; | |
1626 | default: | |
033abf97 | 1627 | BUG("unknown binary handling mode"); |
335ec3bf | 1628 | } |
83b5d2f5 JH |
1629 | } |
1630 | ||
60ecac98 | 1631 | memset(&xecfg, 0, sizeof(xecfg)); |
0579f91d TR |
1632 | opt->priv = &xecfg; |
1633 | ||
a26345b6 | 1634 | try_lookahead = should_lookahead(opt); |
60ecac98 | 1635 | |
38bbc2ea | 1636 | if (fill_textconv_grep(opt->repo, textconv, gs) < 0) |
08265798 JK |
1637 | return 0; |
1638 | ||
e1327023 JK |
1639 | bol = gs->buf; |
1640 | left = gs->size; | |
83b5d2f5 | 1641 | while (left) { |
1a845fbc | 1642 | const char *eol; |
0ab7befa | 1643 | int hit; |
89252cd0 | 1644 | ssize_t cno; |
68d686e6 | 1645 | ssize_t col = -1, icol = -1; |
83b5d2f5 | 1646 | |
a26345b6 | 1647 | /* |
8997da38 | 1648 | * look_ahead() skips quickly to the line that possibly |
a26345b6 JH |
1649 | * has the next hit; don't call it if we need to do |
1650 | * something more than just skipping the current line | |
1651 | * in response to an unmatch for the current line. E.g. | |
1652 | * inside a post-context window, we will show the current | |
1653 | * line as a context around the previous hit when it | |
1654 | * doesn't hit. | |
1655 | */ | |
1656 | if (try_lookahead | |
1657 | && !(last_hit | |
ba8ea749 RS |
1658 | && (show_function || |
1659 | lno <= last_hit + opt->post_context)) | |
a26345b6 JH |
1660 | && look_ahead(opt, &left, &lno, &bol)) |
1661 | break; | |
83b5d2f5 | 1662 | eol = end_of_line(bol, &left); |
83b5d2f5 | 1663 | |
480c1ca6 JH |
1664 | if ((ctx == GREP_CONTEXT_HEAD) && (eol == bol)) |
1665 | ctx = GREP_CONTEXT_BODY; | |
1666 | ||
68d686e6 | 1667 | hit = match_line(opt, bol, eol, &col, &icol, ctx, collect_hits); |
83b5d2f5 | 1668 | |
0ab7befa JH |
1669 | if (collect_hits) |
1670 | goto next_line; | |
1671 | ||
83b5d2f5 JH |
1672 | /* "grep -v -e foo -e bla" should list lines |
1673 | * that do not have either, so inversion should | |
1674 | * be done outside. | |
1675 | */ | |
1676 | if (opt->invert) | |
1677 | hit = !hit; | |
1678 | if (opt->unmatch_name_only) { | |
1679 | if (hit) | |
1680 | return 0; | |
1681 | goto next_line; | |
1682 | } | |
68437ede | 1683 | if (hit && (opt->max_count < 0 || count < opt->max_count)) { |
83b5d2f5 JH |
1684 | count++; |
1685 | if (opt->status_only) | |
1686 | return 1; | |
321ffcc0 | 1687 | if (opt->name_only) { |
e1327023 | 1688 | show_name(opt, gs->name); |
321ffcc0 RS |
1689 | return 1; |
1690 | } | |
c30c10cf RS |
1691 | if (opt->count) |
1692 | goto next_line; | |
83b5d2f5 | 1693 | if (binary_match_only) { |
5b594f45 | 1694 | opt->output(opt, "Binary file ", 12); |
e1327023 | 1695 | output_color(opt, gs->name, strlen(gs->name), |
fa151dc5 | 1696 | opt->colors[GREP_COLOR_FILENAME]); |
5b594f45 | 1697 | opt->output(opt, " matches\n", 9); |
83b5d2f5 JH |
1698 | return 1; |
1699 | } | |
83b5d2f5 JH |
1700 | /* Hit at this line. If we haven't shown the |
1701 | * pre-context lines, we would need to show them. | |
83b5d2f5 | 1702 | */ |
ba8ea749 | 1703 | if (opt->pre_context || opt->funcbody) |
e1327023 | 1704 | show_pre_context(opt, gs, bol, eol, lno); |
2944e4e6 | 1705 | else if (opt->funcname) |
e1327023 | 1706 | show_funcname_line(opt, gs, bol, lno); |
89252cd0 TB |
1707 | cno = opt->invert ? icol : col; |
1708 | if (cno < 0) { | |
1709 | /* | |
1710 | * A negative cno indicates that there was no | |
1711 | * match on the line. We are thus inverted and | |
1712 | * being asked to show all lines that _don't_ | |
1713 | * match a given expression. Therefore, set cno | |
1714 | * to 0 to suggest the whole line matches. | |
1715 | */ | |
1716 | cno = 0; | |
1717 | } | |
1718 | show_line(opt, bol, eol, gs->name, lno, cno + 1, ':'); | |
5dd06d38 | 1719 | last_hit = lno; |
ba8ea749 RS |
1720 | if (opt->funcbody) |
1721 | show_function = 1; | |
1722 | goto next_line; | |
83b5d2f5 | 1723 | } |
4aa2c475 RS |
1724 | if (show_function && (!peek_bol || peek_bol < bol)) { |
1725 | unsigned long peek_left = left; | |
1a845fbc | 1726 | const char *peek_eol = eol; |
4aa2c475 RS |
1727 | |
1728 | /* | |
1729 | * Trailing empty lines are not interesting. | |
1730 | * Peek past them to see if they belong to the | |
1731 | * body of the current function. | |
1732 | */ | |
1733 | peek_bol = bol; | |
1734 | while (is_empty_line(peek_bol, peek_eol)) { | |
1735 | peek_bol = peek_eol + 1; | |
1736 | peek_eol = end_of_line(peek_bol, &peek_left); | |
1737 | } | |
1738 | ||
1739 | if (match_funcname(opt, gs, peek_bol, peek_eol)) | |
1740 | show_function = 0; | |
1741 | } | |
ba8ea749 RS |
1742 | if (show_function || |
1743 | (last_hit && lno <= last_hit + opt->post_context)) { | |
83b5d2f5 JH |
1744 | /* If the last hit is within the post context, |
1745 | * we need to show this line. | |
1746 | */ | |
89252cd0 | 1747 | show_line(opt, bol, eol, gs->name, lno, col + 1, '-'); |
83b5d2f5 | 1748 | } |
83b5d2f5 JH |
1749 | |
1750 | next_line: | |
1751 | bol = eol + 1; | |
1752 | if (!left) | |
1753 | break; | |
1754 | left--; | |
1755 | lno++; | |
1756 | } | |
1757 | ||
0ab7befa JH |
1758 | if (collect_hits) |
1759 | return 0; | |
b48fb5b6 | 1760 | |
83b5d2f5 | 1761 | if (opt->status_only) |
e1f68c66 | 1762 | return opt->unmatch_name_only; |
83b5d2f5 JH |
1763 | if (opt->unmatch_name_only) { |
1764 | /* We did not see any hit, so we want to show this */ | |
e1327023 | 1765 | show_name(opt, gs->name); |
83b5d2f5 JH |
1766 | return 1; |
1767 | } | |
1768 | ||
60ecac98 RS |
1769 | xdiff_clear_find_func(&xecfg); |
1770 | opt->priv = NULL; | |
1771 | ||
83b5d2f5 JH |
1772 | /* NEEDSWORK: |
1773 | * The real "grep -c foo *.c" gives many "bar.c:0" lines, | |
1774 | * which feels mostly useless but sometimes useful. Maybe | |
1775 | * make it another option? For now suppress them. | |
1776 | */ | |
5b594f45 FK |
1777 | if (opt->count && count) { |
1778 | char buf[32]; | |
f76d947a RS |
1779 | if (opt->pathname) { |
1780 | output_color(opt, gs->name, strlen(gs->name), | |
fa151dc5 | 1781 | opt->colors[GREP_COLOR_FILENAME]); |
f76d947a RS |
1782 | output_sep(opt, ':'); |
1783 | } | |
1a168e5c | 1784 | xsnprintf(buf, sizeof(buf), "%u\n", count); |
5b594f45 | 1785 | opt->output(opt, buf, strlen(buf)); |
c30c10cf | 1786 | return 1; |
5b594f45 | 1787 | } |
83b5d2f5 JH |
1788 | return !!last_hit; |
1789 | } | |
1790 | ||
0ab7befa JH |
1791 | static void clr_hit_marker(struct grep_expr *x) |
1792 | { | |
1793 | /* All-hit markers are meaningful only at the very top level | |
1794 | * OR node. | |
1795 | */ | |
1796 | while (1) { | |
1797 | x->hit = 0; | |
1798 | if (x->node != GREP_NODE_OR) | |
1799 | return; | |
1800 | x->u.binary.left->hit = 0; | |
1801 | x = x->u.binary.right; | |
1802 | } | |
1803 | } | |
1804 | ||
1805 | static int chk_hit_marker(struct grep_expr *x) | |
1806 | { | |
1807 | /* Top level nodes have hit markers. See if they all are hits */ | |
1808 | while (1) { | |
1809 | if (x->node != GREP_NODE_OR) | |
1810 | return x->hit; | |
1811 | if (!x->u.binary.left->hit) | |
1812 | return 0; | |
1813 | x = x->u.binary.right; | |
1814 | } | |
1815 | } | |
1816 | ||
e1327023 | 1817 | int grep_source(struct grep_opt *opt, struct grep_source *gs) |
0ab7befa JH |
1818 | { |
1819 | /* | |
1820 | * we do not have to do the two-pass grep when we do not check | |
1821 | * buffer-wide "all-match". | |
1822 | */ | |
794c0002 | 1823 | if (!opt->all_match && !opt->no_body_match) |
e1327023 | 1824 | return grep_source_1(opt, gs, 0); |
0ab7befa JH |
1825 | |
1826 | /* Otherwise the toplevel "or" terms hit a bit differently. | |
1827 | * We first clear hit markers from them. | |
1828 | */ | |
1829 | clr_hit_marker(opt->pattern_expression); | |
794c0002 | 1830 | opt->body_hit = 0; |
e1327023 | 1831 | grep_source_1(opt, gs, 1); |
0ab7befa | 1832 | |
794c0002 RS |
1833 | if (opt->all_match && !chk_hit_marker(opt->pattern_expression)) |
1834 | return 0; | |
1835 | if (opt->no_body_match && opt->body_hit) | |
0ab7befa JH |
1836 | return 0; |
1837 | ||
e1327023 JK |
1838 | return grep_source_1(opt, gs, 0); |
1839 | } | |
1840 | ||
1e668716 JK |
1841 | static void grep_source_init_buf(struct grep_source *gs, |
1842 | const char *buf, | |
50d92b5f JT |
1843 | unsigned long size) |
1844 | { | |
1845 | gs->type = GREP_SOURCE_BUF; | |
1846 | gs->name = NULL; | |
1847 | gs->path = NULL; | |
1848 | gs->buf = buf; | |
1849 | gs->size = size; | |
1850 | gs->driver = NULL; | |
1851 | gs->identifier = NULL; | |
1852 | } | |
1853 | ||
1e668716 | 1854 | int grep_buffer(struct grep_opt *opt, const char *buf, unsigned long size) |
e1327023 JK |
1855 | { |
1856 | struct grep_source gs; | |
1857 | int r; | |
1858 | ||
50d92b5f | 1859 | grep_source_init_buf(&gs, buf, size); |
e1327023 JK |
1860 | |
1861 | r = grep_source(opt, &gs); | |
1862 | ||
1863 | grep_source_clear(&gs); | |
1864 | return r; | |
1865 | } | |
1866 | ||
50d92b5f JT |
1867 | void grep_source_init_file(struct grep_source *gs, const char *name, |
1868 | const char *path) | |
e1327023 | 1869 | { |
50d92b5f | 1870 | gs->type = GREP_SOURCE_FILE; |
8c53f071 JK |
1871 | gs->name = xstrdup_or_null(name); |
1872 | gs->path = xstrdup_or_null(path); | |
e1327023 JK |
1873 | gs->buf = NULL; |
1874 | gs->size = 0; | |
94ad9d9e | 1875 | gs->driver = NULL; |
50d92b5f JT |
1876 | gs->identifier = xstrdup(path); |
1877 | } | |
e1327023 | 1878 | |
50d92b5f | 1879 | void grep_source_init_oid(struct grep_source *gs, const char *name, |
0693806b JT |
1880 | const char *path, const struct object_id *oid, |
1881 | struct repository *repo) | |
50d92b5f JT |
1882 | { |
1883 | gs->type = GREP_SOURCE_OID; | |
1884 | gs->name = xstrdup_or_null(name); | |
1885 | gs->path = xstrdup_or_null(path); | |
1886 | gs->buf = NULL; | |
1887 | gs->size = 0; | |
1888 | gs->driver = NULL; | |
1889 | gs->identifier = oiddup(oid); | |
0693806b | 1890 | gs->repo = repo; |
e1327023 JK |
1891 | } |
1892 | ||
1893 | void grep_source_clear(struct grep_source *gs) | |
1894 | { | |
88ce3ef6 ÆAB |
1895 | FREE_AND_NULL(gs->name); |
1896 | FREE_AND_NULL(gs->path); | |
1897 | FREE_AND_NULL(gs->identifier); | |
e1327023 JK |
1898 | grep_source_clear_data(gs); |
1899 | } | |
1900 | ||
1901 | void grep_source_clear_data(struct grep_source *gs) | |
1902 | { | |
1903 | switch (gs->type) { | |
1904 | case GREP_SOURCE_FILE: | |
1c41c82b | 1905 | case GREP_SOURCE_OID: |
1e668716 JK |
1906 | /* these types own the buffer */ |
1907 | free((char *)gs->buf); | |
1908 | gs->buf = NULL; | |
e1327023 JK |
1909 | gs->size = 0; |
1910 | break; | |
1911 | case GREP_SOURCE_BUF: | |
1912 | /* leave user-provided buf intact */ | |
1913 | break; | |
1914 | } | |
1915 | } | |
1916 | ||
1c41c82b | 1917 | static int grep_source_load_oid(struct grep_source *gs) |
e1327023 JK |
1918 | { |
1919 | enum object_type type; | |
1920 | ||
0693806b JT |
1921 | gs->buf = repo_read_object_file(gs->repo, gs->identifier, &type, |
1922 | &gs->size); | |
e1327023 JK |
1923 | if (!gs->buf) |
1924 | return error(_("'%s': unable to read %s"), | |
1925 | gs->name, | |
1c41c82b | 1926 | oid_to_hex(gs->identifier)); |
e1327023 JK |
1927 | return 0; |
1928 | } | |
1929 | ||
1930 | static int grep_source_load_file(struct grep_source *gs) | |
1931 | { | |
1932 | const char *filename = gs->identifier; | |
1933 | struct stat st; | |
1934 | char *data; | |
1935 | size_t size; | |
1936 | int i; | |
1937 | ||
1938 | if (lstat(filename, &st) < 0) { | |
1939 | err_ret: | |
1940 | if (errno != ENOENT) | |
7645d8f1 | 1941 | error_errno(_("failed to stat '%s'"), filename); |
e1327023 JK |
1942 | return -1; |
1943 | } | |
1944 | if (!S_ISREG(st.st_mode)) | |
1945 | return -1; | |
1946 | size = xsize_t(st.st_size); | |
1947 | i = open(filename, O_RDONLY); | |
1948 | if (i < 0) | |
1949 | goto err_ret; | |
3733e694 | 1950 | data = xmallocz(size); |
e1327023 | 1951 | if (st.st_size != read_in_full(i, data, size)) { |
7645d8f1 | 1952 | error_errno(_("'%s': short read"), filename); |
e1327023 JK |
1953 | close(i); |
1954 | free(data); | |
1955 | return -1; | |
1956 | } | |
1957 | close(i); | |
e1327023 JK |
1958 | |
1959 | gs->buf = data; | |
1960 | gs->size = size; | |
1961 | return 0; | |
1962 | } | |
1963 | ||
3083301e | 1964 | static int grep_source_load(struct grep_source *gs) |
e1327023 JK |
1965 | { |
1966 | if (gs->buf) | |
1967 | return 0; | |
1968 | ||
1969 | switch (gs->type) { | |
1970 | case GREP_SOURCE_FILE: | |
1971 | return grep_source_load_file(gs); | |
1c41c82b BW |
1972 | case GREP_SOURCE_OID: |
1973 | return grep_source_load_oid(gs); | |
e1327023 JK |
1974 | case GREP_SOURCE_BUF: |
1975 | return gs->buf ? 0 : -1; | |
1976 | } | |
033abf97 | 1977 | BUG("invalid grep_source type to load"); |
0ab7befa | 1978 | } |
94ad9d9e | 1979 | |
acd00ea0 NTND |
1980 | void grep_source_load_driver(struct grep_source *gs, |
1981 | struct index_state *istate) | |
94ad9d9e JK |
1982 | { |
1983 | if (gs->driver) | |
1984 | return; | |
1985 | ||
1986 | grep_attr_lock(); | |
1d1729ca | 1987 | if (gs->path) |
acd00ea0 | 1988 | gs->driver = userdiff_find_by_path(istate, gs->path); |
94ad9d9e JK |
1989 | if (!gs->driver) |
1990 | gs->driver = userdiff_find_by_name("default"); | |
1991 | grep_attr_unlock(); | |
1992 | } | |
41b59bfc | 1993 | |
acd00ea0 NTND |
1994 | static int grep_source_is_binary(struct grep_source *gs, |
1995 | struct index_state *istate) | |
41b59bfc | 1996 | { |
acd00ea0 | 1997 | grep_source_load_driver(gs, istate); |
41b59bfc JK |
1998 | if (gs->driver->binary != -1) |
1999 | return gs->driver->binary; | |
2000 | ||
2001 | if (!grep_source_load(gs)) | |
2002 | return buffer_is_binary(gs->buf, gs->size); | |
2003 | ||
2004 | return 0; | |
2005 | } |