blob: f6bd89e40b7f7a8442a6e0a302a1e6080df5afbd [file] [log] [blame]
Junio C Hamano83b5d2f2006-09-17 16:02:52 -07001#include "cache.h"
Brandon Williamsb2141fc2017-06-14 11:07:36 -07002#include "config.h"
Junio C Hamano83b5d2f2006-09-17 16:02:52 -07003#include "grep.h"
Stefan Bellercbd53a22018-05-15 16:42:15 -07004#include "object-store.h"
René Scharfe60ecac92009-07-02 00:07:24 +02005#include "userdiff.h"
Johannes Schindelin6bfce932007-06-05 03:36:11 +01006#include "xdiff-interface.h"
Jeff King335ec3b2013-05-10 17:10:15 +02007#include "diff.h"
8#include "diffcore.h"
Nguyễn Thái Ngọc Duy5c1ebcc2016-06-25 07:22:30 +02009#include "commit.h"
Nguyễn Thái Ngọc Duy793dc672016-06-25 07:22:31 +020010#include "quote.h"
Nguyễn Thái Ngọc Duy3ac68a92018-05-26 15:55:24 +020011#include "help.h"
Junio C Hamano83b5d2f2006-09-17 16:02:52 -070012
Junio C Hamano07a7d652012-09-15 14:04:36 -070013static int grep_source_load(struct grep_source *gs);
Nguyễn Thái Ngọc Duyacd00ea2018-09-21 17:57:33 +020014static int grep_source_is_binary(struct grep_source *gs,
15 struct index_state *istate);
Junio C Hamano07a7d652012-09-15 14:04:36 -070016
Junio C Hamano7687a052012-10-09 16:17:50 -070017static struct grep_opt grep_defaults;
18
Nguyễn Thái Ngọc Duyfa151dc2018-05-26 15:55:22 +020019static const char *color_grep_slots[] = {
20 [GREP_COLOR_CONTEXT] = "context",
21 [GREP_COLOR_FILENAME] = "filename",
22 [GREP_COLOR_FUNCTION] = "function",
23 [GREP_COLOR_LINENO] = "lineNumber",
Junio C Hamanod036d662018-07-18 12:20:31 -070024 [GREP_COLOR_COLUMNNO] = "column",
Nguyễn Thái Ngọc Duyfa151dc2018-05-26 15:55:22 +020025 [GREP_COLOR_MATCH_CONTEXT] = "matchContext",
26 [GREP_COLOR_MATCH_SELECTED] = "matchSelected",
27 [GREP_COLOR_SELECTED] = "selected",
28 [GREP_COLOR_SEP] = "separator",
29};
30
Brandon Williams379642b2017-03-17 11:41:54 -070031static void std_output(struct grep_opt *opt, const void *buf, size_t size)
32{
33 fwrite(buf, size, 1, stdout);
34}
35
Stefan Beller75e5e9c2018-02-12 17:41:30 -080036static void color_set(char *dst, const char *color_bytes)
37{
38 xsnprintf(dst, COLOR_MAXLEN, "%s", color_bytes);
39}
40
Junio C Hamano7687a052012-10-09 16:17:50 -070041/*
42 * Initialize the grep_defaults template with hardcoded defaults.
43 * We could let the compiler do this, but without C99 initializers
44 * the code gets unwieldy and unreadable, so...
45 */
Nguyễn Thái Ngọc Duy38bbc2e2018-09-21 17:57:23 +020046void init_grep_defaults(struct repository *repo)
Junio C Hamano7687a052012-10-09 16:17:50 -070047{
48 struct grep_opt *opt = &grep_defaults;
Junio C Hamano918d4e12012-10-09 16:40:03 -070049 static int run_once;
50
51 if (run_once)
52 return;
53 run_once++;
Junio C Hamano7687a052012-10-09 16:17:50 -070054
55 memset(opt, 0, sizeof(*opt));
Nguyễn Thái Ngọc Duy38bbc2e2018-09-21 17:57:23 +020056 opt->repo = repo;
Junio C Hamano7687a052012-10-09 16:17:50 -070057 opt->relative = 1;
58 opt->pathname = 1;
Junio C Hamano7687a052012-10-09 16:17:50 -070059 opt->max_depth = -1;
60 opt->pattern_type_option = GREP_PATTERN_TYPE_UNSPECIFIED;
Nguyễn Thái Ngọc Duyfa151dc2018-05-26 15:55:22 +020061 color_set(opt->colors[GREP_COLOR_CONTEXT], "");
62 color_set(opt->colors[GREP_COLOR_FILENAME], "");
63 color_set(opt->colors[GREP_COLOR_FUNCTION], "");
64 color_set(opt->colors[GREP_COLOR_LINENO], "");
Junio C Hamanod036d662018-07-18 12:20:31 -070065 color_set(opt->colors[GREP_COLOR_COLUMNNO], "");
Nguyễn Thái Ngọc Duyfa151dc2018-05-26 15:55:22 +020066 color_set(opt->colors[GREP_COLOR_MATCH_CONTEXT], GIT_COLOR_BOLD_RED);
67 color_set(opt->colors[GREP_COLOR_MATCH_SELECTED], GIT_COLOR_BOLD_RED);
68 color_set(opt->colors[GREP_COLOR_SELECTED], "");
69 color_set(opt->colors[GREP_COLOR_SEP], GIT_COLOR_CYAN);
Taylor Blau9d8db062018-07-09 15:33:47 -050070 opt->only_matching = 0;
Junio C Hamano7687a052012-10-09 16:17:50 -070071 opt->color = -1;
Brandon Williams379642b2017-03-17 11:41:54 -070072 opt->output = std_output;
Junio C Hamano7687a052012-10-09 16:17:50 -070073}
74
75static int parse_pattern_type_arg(const char *opt, const char *arg)
76{
77 if (!strcmp(arg, "default"))
78 return GREP_PATTERN_TYPE_UNSPECIFIED;
79 else if (!strcmp(arg, "basic"))
80 return GREP_PATTERN_TYPE_BRE;
81 else if (!strcmp(arg, "extended"))
82 return GREP_PATTERN_TYPE_ERE;
83 else if (!strcmp(arg, "fixed"))
84 return GREP_PATTERN_TYPE_FIXED;
85 else if (!strcmp(arg, "perl"))
86 return GREP_PATTERN_TYPE_PCRE;
87 die("bad %s argument: %s", opt, arg);
88}
89
Nguyễn Thái Ngọc Duy3ac68a92018-05-26 15:55:24 +020090define_list_config_array_extra(color_grep_slots, {"match"});
91
Junio C Hamano7687a052012-10-09 16:17:50 -070092/*
93 * Read the configuration file once and store it in
94 * the grep_defaults template.
95 */
96int grep_config(const char *var, const char *value, void *cb)
97{
98 struct grep_opt *opt = &grep_defaults;
Nguyễn Thái Ngọc Duyfa151dc2018-05-26 15:55:22 +020099 const char *slot;
Junio C Hamano7687a052012-10-09 16:17:50 -0700100
101 if (userdiff_config(var, value) < 0)
102 return -1;
103
104 if (!strcmp(var, "grep.extendedregexp")) {
Ævar Arnfjörð Bjarmasonc7e38552017-06-29 22:22:18 +0000105 opt->extended_regexp_option = git_config_bool(var, value);
Junio C Hamano7687a052012-10-09 16:17:50 -0700106 return 0;
107 }
108
109 if (!strcmp(var, "grep.patterntype")) {
110 opt->pattern_type_option = parse_pattern_type_arg(var, value);
111 return 0;
112 }
113
114 if (!strcmp(var, "grep.linenumber")) {
115 opt->linenum = git_config_bool(var, value);
116 return 0;
117 }
Taylor Blau6653fec2018-06-22 10:49:49 -0500118 if (!strcmp(var, "grep.column")) {
119 opt->columnnum = git_config_bool(var, value);
120 return 0;
121 }
Junio C Hamano7687a052012-10-09 16:17:50 -0700122
Andreas Schwab6453f7b2014-03-17 20:16:05 +0100123 if (!strcmp(var, "grep.fullname")) {
124 opt->relative = !git_config_bool(var, value);
125 return 0;
126 }
127
Junio C Hamano7687a052012-10-09 16:17:50 -0700128 if (!strcmp(var, "color.grep"))
129 opt->color = git_config_colorbool(var, value);
Nguyễn Thái Ngọc Duyfa151dc2018-05-26 15:55:22 +0200130 if (!strcmp(var, "color.grep.match")) {
131 if (grep_config("color.grep.matchcontext", value, cb) < 0)
132 return -1;
133 if (grep_config("color.grep.matchselected", value, cb) < 0)
134 return -1;
135 } else if (skip_prefix(var, "color.grep.", &slot)) {
136 int i = LOOKUP_CONFIG(color_grep_slots, slot);
137 char *color;
Junio C Hamano7687a052012-10-09 16:17:50 -0700138
Nguyễn Thái Ngọc Duyfa151dc2018-05-26 15:55:22 +0200139 if (i < 0)
140 return -1;
141 color = opt->colors[i];
Junio C Hamano7687a052012-10-09 16:17:50 -0700142 if (!value)
143 return config_error_nonbool(var);
Jeff Kingf6c5a292014-10-07 15:33:09 -0400144 return color_parse(value, color);
Junio C Hamano7687a052012-10-09 16:17:50 -0700145 }
146 return 0;
147}
148
149/*
150 * Initialize one instance of grep_opt and copy the
151 * default values from the template we read the configuration
152 * information in an earlier call to git_config(grep_config).
153 */
Nguyễn Thái Ngọc Duy38bbc2e2018-09-21 17:57:23 +0200154void grep_init(struct grep_opt *opt, struct repository *repo, const char *prefix)
Junio C Hamano7687a052012-10-09 16:17:50 -0700155{
156 struct grep_opt *def = &grep_defaults;
Nguyễn Thái Ngọc Duyfa151dc2018-05-26 15:55:22 +0200157 int i;
Junio C Hamano7687a052012-10-09 16:17:50 -0700158
159 memset(opt, 0, sizeof(*opt));
Nguyễn Thái Ngọc Duy38bbc2e2018-09-21 17:57:23 +0200160 opt->repo = repo;
Junio C Hamano7687a052012-10-09 16:17:50 -0700161 opt->prefix = prefix;
162 opt->prefix_length = (prefix && *prefix) ? strlen(prefix) : 0;
163 opt->pattern_tail = &opt->pattern_list;
164 opt->header_tail = &opt->header_list;
165
Taylor Blau9d8db062018-07-09 15:33:47 -0500166 opt->only_matching = def->only_matching;
Junio C Hamano7687a052012-10-09 16:17:50 -0700167 opt->color = def->color;
168 opt->extended_regexp_option = def->extended_regexp_option;
169 opt->pattern_type_option = def->pattern_type_option;
170 opt->linenum = def->linenum;
Taylor Blau017c0fc2018-06-22 10:49:39 -0500171 opt->columnnum = def->columnnum;
Junio C Hamano7687a052012-10-09 16:17:50 -0700172 opt->max_depth = def->max_depth;
173 opt->pathname = def->pathname;
Junio C Hamano7687a052012-10-09 16:17:50 -0700174 opt->relative = def->relative;
Brandon Williams379642b2017-03-17 11:41:54 -0700175 opt->output = def->output;
Junio C Hamano7687a052012-10-09 16:17:50 -0700176
Nguyễn Thái Ngọc Duyfa151dc2018-05-26 15:55:22 +0200177 for (i = 0; i < NR_GREP_COLORS; i++)
178 color_set(opt->colors[i], def->colors[i]);
Junio C Hamano7687a052012-10-09 16:17:50 -0700179}
Junio C Hamano07a7d652012-09-15 14:04:36 -0700180
Junio C Hamano84655412016-07-22 11:43:14 -0700181static void grep_set_pattern_type_option(enum grep_pattern_type pattern_type, struct grep_opt *opt)
Junio C Hamanoc5c31d32012-10-03 14:47:48 -0700182{
Ævar Arnfjörð Bjarmason07a3d412017-06-29 22:22:21 +0000183 /*
184 * When committing to the pattern type by setting the relevant
185 * fields in grep_opt it's generally not necessary to zero out
186 * the fields we're not choosing, since they won't have been
187 * set by anything. The extended_regexp_option field is the
188 * only exception to this.
189 *
190 * This is because in the process of parsing grep.patternType
191 * & grep.extendedRegexp we set opt->pattern_type_option and
192 * opt->extended_regexp_option, respectively. We then
193 * internally use opt->extended_regexp_option to see if we're
194 * compiling an ERE. It must be unset if that's not actually
195 * the case.
196 */
197 if (pattern_type != GREP_PATTERN_TYPE_ERE &&
198 opt->extended_regexp_option)
199 opt->extended_regexp_option = 0;
200
Junio C Hamanoc5c31d32012-10-03 14:47:48 -0700201 switch (pattern_type) {
202 case GREP_PATTERN_TYPE_UNSPECIFIED:
203 /* fall through */
204
205 case GREP_PATTERN_TYPE_BRE:
Junio C Hamanoc5c31d32012-10-03 14:47:48 -0700206 break;
207
208 case GREP_PATTERN_TYPE_ERE:
Ævar Arnfjörð Bjarmason07a3d412017-06-29 22:22:21 +0000209 opt->extended_regexp_option = 1;
Junio C Hamanoc5c31d32012-10-03 14:47:48 -0700210 break;
211
212 case GREP_PATTERN_TYPE_FIXED:
213 opt->fixed = 1;
Junio C Hamanoc5c31d32012-10-03 14:47:48 -0700214 break;
215
216 case GREP_PATTERN_TYPE_PCRE:
Ævar Arnfjörð Bjarmason94da9192017-06-01 18:20:56 +0000217#ifdef USE_LIBPCRE2
Ævar Arnfjörð Bjarmason94da9192017-06-01 18:20:56 +0000218 opt->pcre2 = 1;
219#else
220 /*
221 * It's important that pcre1 always be assigned to
222 * even when there's no USE_LIBPCRE* defined. We still
223 * call the PCRE stub function, it just dies with
224 * "cannot use Perl-compatible regexes[...]".
225 */
Ævar Arnfjörð Bjarmason6d4b5742017-05-25 19:45:29 +0000226 opt->pcre1 = 1;
Ævar Arnfjörð Bjarmason94da9192017-06-01 18:20:56 +0000227#endif
Junio C Hamanoc5c31d32012-10-03 14:47:48 -0700228 break;
229 }
230}
231
Junio C Hamano84655412016-07-22 11:43:14 -0700232void grep_commit_pattern_type(enum grep_pattern_type pattern_type, struct grep_opt *opt)
233{
234 if (pattern_type != GREP_PATTERN_TYPE_UNSPECIFIED)
235 grep_set_pattern_type_option(pattern_type, opt);
236 else if (opt->pattern_type_option != GREP_PATTERN_TYPE_UNSPECIFIED)
237 grep_set_pattern_type_option(opt->pattern_type_option, opt);
238 else if (opt->extended_regexp_option)
Ævar Arnfjörð Bjarmason07a3d412017-06-29 22:22:21 +0000239 /*
240 * This branch *must* happen after setting from the
241 * opt->pattern_type_option above, we don't want
242 * grep.extendedRegexp to override grep.patternType!
243 */
Junio C Hamano84655412016-07-22 11:43:14 -0700244 grep_set_pattern_type_option(GREP_PATTERN_TYPE_ERE, opt);
245}
246
René Scharfefc456752012-05-20 16:32:39 +0200247static struct grep_pat *create_grep_pat(const char *pat, size_t patlen,
248 const char *origin, int no,
249 enum grep_pat_token t,
250 enum grep_header_field field)
Junio C Hamanoa4d7d2c2008-09-04 22:15:02 -0700251{
252 struct grep_pat *p = xcalloc(1, sizeof(*p));
René Scharfe526a8582012-05-20 16:33:07 +0200253 p->pattern = xmemdupz(pat, patlen);
René Scharfefc456752012-05-20 16:32:39 +0200254 p->patternlen = patlen;
255 p->origin = origin;
256 p->no = no;
257 p->token = t;
Junio C Hamanoa4d7d2c2008-09-04 22:15:02 -0700258 p->field = field;
René Scharfefc456752012-05-20 16:32:39 +0200259 return p;
260}
261
René Scharfe2b3873f2012-05-20 16:32:54 +0200262static void do_append_grep_pat(struct grep_pat ***tail, struct grep_pat *p)
263{
264 **tail = p;
265 *tail = &p->next;
Junio C Hamanoa4d7d2c2008-09-04 22:15:02 -0700266 p->next = NULL;
René Scharfe526a8582012-05-20 16:33:07 +0200267
268 switch (p->token) {
269 case GREP_PATTERN: /* atom */
270 case GREP_PATTERN_HEAD:
271 case GREP_PATTERN_BODY:
272 for (;;) {
273 struct grep_pat *new_pat;
274 size_t len = 0;
275 char *cp = p->pattern + p->patternlen, *nl = NULL;
276 while (++len <= p->patternlen) {
277 if (*(--cp) == '\n') {
278 nl = cp;
279 break;
280 }
281 }
282 if (!nl)
283 break;
284 new_pat = create_grep_pat(nl + 1, len - 1, p->origin,
285 p->no, p->token, p->field);
286 new_pat->next = p->next;
287 if (!p->next)
288 *tail = &new_pat->next;
289 p->next = new_pat;
290 *nl = '\0';
291 p->patternlen -= len;
292 }
293 break;
294 default:
295 break;
296 }
René Scharfe2b3873f2012-05-20 16:32:54 +0200297}
298
René Scharfefc456752012-05-20 16:32:39 +0200299void append_header_grep_pattern(struct grep_opt *opt,
300 enum grep_header_field field, const char *pat)
301{
302 struct grep_pat *p = create_grep_pat(pat, strlen(pat), "header", 0,
303 GREP_PATTERN_HEAD, field);
Junio C Hamanobaa63782012-09-29 11:59:52 -0700304 if (field == GREP_HEADER_REFLOG)
305 opt->use_reflog_filter = 1;
René Scharfe2b3873f2012-05-20 16:32:54 +0200306 do_append_grep_pat(&opt->header_tail, p);
Junio C Hamanoa4d7d2c2008-09-04 22:15:02 -0700307}
308
Junio C Hamano83b5d2f2006-09-17 16:02:52 -0700309void append_grep_pattern(struct grep_opt *opt, const char *pat,
310 const char *origin, int no, enum grep_pat_token t)
311{
René Scharfeed40a092010-05-22 23:43:43 +0200312 append_grep_pat(opt, pat, strlen(pat), origin, no, t);
313}
314
315void append_grep_pat(struct grep_opt *opt, const char *pat, size_t patlen,
316 const char *origin, int no, enum grep_pat_token t)
317{
René Scharfefc456752012-05-20 16:32:39 +0200318 struct grep_pat *p = create_grep_pat(pat, patlen, origin, no, t, 0);
René Scharfe2b3873f2012-05-20 16:32:54 +0200319 do_append_grep_pat(&opt->pattern_tail, p);
Junio C Hamano83b5d2f2006-09-17 16:02:52 -0700320}
321
Fredrik Kuivinen5b594f42010-01-25 23:51:39 +0100322struct grep_opt *grep_opt_dup(const struct grep_opt *opt)
323{
324 struct grep_pat *pat;
325 struct grep_opt *ret = xmalloc(sizeof(struct grep_opt));
326 *ret = *opt;
327
328 ret->pattern_list = NULL;
329 ret->pattern_tail = &ret->pattern_list;
330
331 for(pat = opt->pattern_list; pat != NULL; pat = pat->next)
332 {
333 if(pat->token == GREP_PATTERN_HEAD)
334 append_header_grep_pattern(ret, pat->field,
335 pat->pattern);
336 else
René Scharfeed40a092010-05-22 23:43:43 +0200337 append_grep_pat(ret, pat->pattern, pat->patternlen,
338 pat->origin, pat->no, pat->token);
Fredrik Kuivinen5b594f42010-01-25 23:51:39 +0100339 }
340
341 return ret;
342}
343
Michał Kiedrowicza30c1482011-05-09 23:52:04 +0200344static NORETURN void compile_regexp_failed(const struct grep_pat *p,
345 const char *error)
346{
347 char where[1024];
348
349 if (p->no)
Jeff King19bdd3e2015-09-24 17:06:51 -0400350 xsnprintf(where, sizeof(where), "In '%s' at %d, ", p->origin, p->no);
Michał Kiedrowicza30c1482011-05-09 23:52:04 +0200351 else if (p->origin)
Jeff King19bdd3e2015-09-24 17:06:51 -0400352 xsnprintf(where, sizeof(where), "%s, ", p->origin);
Michał Kiedrowicza30c1482011-05-09 23:52:04 +0200353 else
354 where[0] = 0;
355
356 die("%s'%s': %s", where, p->pattern, error);
357}
358
Ævar Arnfjörð Bjarmason543f1c02017-05-25 19:45:30 +0000359static int is_fixed(const char *s, size_t len)
360{
361 size_t i;
362
363 for (i = 0; i < len; i++) {
364 if (is_regex_special(s[i]))
365 return 0;
366 }
367
368 return 1;
369}
370
Ævar Arnfjörð Bjarmason219e65b2017-05-25 19:45:27 +0000371static int has_null(const char *s, size_t len)
372{
373 /*
374 * regcomp cannot accept patterns with NULs so when using it
375 * we consider any pattern containing a NUL fixed.
376 */
377 if (memchr(s, 0, len))
378 return 1;
379
380 return 0;
381}
382
Ævar Arnfjörð Bjarmason3485bea2017-05-25 19:45:28 +0000383#ifdef USE_LIBPCRE1
Ævar Arnfjörð Bjarmason6d4b5742017-05-25 19:45:29 +0000384static void compile_pcre1_regexp(struct grep_pat *p, const struct grep_opt *opt)
Michał Kiedrowicz63e7e9d2011-05-09 23:52:05 +0200385{
386 const char *error;
387 int erroffset;
Michał Kiedrowiczfba4f122012-02-25 10:24:28 +0100388 int options = PCRE_MULTILINE;
Michał Kiedrowicz63e7e9d2011-05-09 23:52:05 +0200389
Nguyễn Thái Ngọc Duy9d9babb2016-06-25 07:22:33 +0200390 if (opt->ignore_case) {
391 if (has_non_ascii(p->pattern))
Ævar Arnfjörð Bjarmason6d4b5742017-05-25 19:45:29 +0000392 p->pcre1_tables = pcre_maketables();
Michał Kiedrowicz63e7e9d2011-05-09 23:52:05 +0200393 options |= PCRE_CASELESS;
Nguyễn Thái Ngọc Duy9d9babb2016-06-25 07:22:33 +0200394 }
Nguyễn Thái Ngọc Duy18547aa2016-06-25 07:22:35 +0200395 if (is_utf8_locale() && has_non_ascii(p->pattern))
396 options |= PCRE_UTF8;
Michał Kiedrowicz63e7e9d2011-05-09 23:52:05 +0200397
Ævar Arnfjörð Bjarmason6d4b5742017-05-25 19:45:29 +0000398 p->pcre1_regexp = pcre_compile(p->pattern, options, &error, &erroffset,
399 p->pcre1_tables);
400 if (!p->pcre1_regexp)
Michał Kiedrowicz63e7e9d2011-05-09 23:52:05 +0200401 compile_regexp_failed(p, error);
402
Charles Bailey2fff1e12017-11-12 16:59:38 +0000403 p->pcre1_extra_info = pcre_study(p->pcre1_regexp, GIT_PCRE_STUDY_JIT_COMPILE, &error);
Ævar Arnfjörð Bjarmason6d4b5742017-05-25 19:45:29 +0000404 if (!p->pcre1_extra_info && error)
Michał Kiedrowicz63e7e9d2011-05-09 23:52:05 +0200405 die("%s", error);
Ævar Arnfjörð Bjarmasonfbaceaa2017-05-25 20:05:25 +0000406
Ævar Arnfjörð Bjarmasone87de7c2017-05-25 20:05:26 +0000407#ifdef GIT_PCRE1_USE_JIT
Ævar Arnfjörð Bjarmasonfbaceaa2017-05-25 20:05:25 +0000408 pcre_config(PCRE_CONFIG_JIT, &p->pcre1_jit_on);
409 if (p->pcre1_jit_on == 1) {
410 p->pcre1_jit_stack = pcre_jit_stack_alloc(1, 1024 * 1024);
411 if (!p->pcre1_jit_stack)
412 die("Couldn't allocate PCRE JIT stack");
413 pcre_assign_jit_stack(p->pcre1_extra_info, NULL, p->pcre1_jit_stack);
414 } else if (p->pcre1_jit_on != 0) {
Johannes Schindelin033abf92018-05-02 11:38:39 +0200415 BUG("The pcre1_jit_on variable should be 0 or 1, not %d",
Ævar Arnfjörð Bjarmasonfbaceaa2017-05-25 20:05:25 +0000416 p->pcre1_jit_on);
417 }
418#endif
Michał Kiedrowicz63e7e9d2011-05-09 23:52:05 +0200419}
420
Ævar Arnfjörð Bjarmason6d4b5742017-05-25 19:45:29 +0000421static int pcre1match(struct grep_pat *p, const char *line, const char *eol,
Michał Kiedrowicz63e7e9d2011-05-09 23:52:05 +0200422 regmatch_t *match, int eflags)
423{
424 int ovector[30], ret, flags = 0;
425
426 if (eflags & REG_NOTBOL)
427 flags |= PCRE_NOTBOL;
428
Ævar Arnfjörð Bjarmasone87de7c2017-05-25 20:05:26 +0000429#ifdef GIT_PCRE1_USE_JIT
Ævar Arnfjörð Bjarmasonfbaceaa2017-05-25 20:05:25 +0000430 if (p->pcre1_jit_on) {
431 ret = pcre_jit_exec(p->pcre1_regexp, p->pcre1_extra_info, line,
432 eol - line, 0, flags, ovector,
433 ARRAY_SIZE(ovector), p->pcre1_jit_stack);
434 } else
435#endif
436 {
437 ret = pcre_exec(p->pcre1_regexp, p->pcre1_extra_info, line,
438 eol - line, 0, flags, ovector,
439 ARRAY_SIZE(ovector));
440 }
441
Michał Kiedrowicz63e7e9d2011-05-09 23:52:05 +0200442 if (ret < 0 && ret != PCRE_ERROR_NOMATCH)
443 die("pcre_exec failed with error code %d", ret);
444 if (ret > 0) {
445 ret = 0;
446 match->rm_so = ovector[0];
447 match->rm_eo = ovector[1];
448 }
449
450 return ret;
451}
452
Ævar Arnfjörð Bjarmason6d4b5742017-05-25 19:45:29 +0000453static void free_pcre1_regexp(struct grep_pat *p)
Michał Kiedrowicz63e7e9d2011-05-09 23:52:05 +0200454{
Ævar Arnfjörð Bjarmason6d4b5742017-05-25 19:45:29 +0000455 pcre_free(p->pcre1_regexp);
Ævar Arnfjörð Bjarmasone87de7c2017-05-25 20:05:26 +0000456#ifdef GIT_PCRE1_USE_JIT
Ævar Arnfjörð Bjarmasonfbaceaa2017-05-25 20:05:25 +0000457 if (p->pcre1_jit_on) {
458 pcre_free_study(p->pcre1_extra_info);
459 pcre_jit_stack_free(p->pcre1_jit_stack);
460 } else
461#endif
462 {
463 pcre_free(p->pcre1_extra_info);
464 }
Ævar Arnfjörð Bjarmason6d4b5742017-05-25 19:45:29 +0000465 pcre_free((void *)p->pcre1_tables);
Michał Kiedrowicz63e7e9d2011-05-09 23:52:05 +0200466}
Ævar Arnfjörð Bjarmason3485bea2017-05-25 19:45:28 +0000467#else /* !USE_LIBPCRE1 */
Ævar Arnfjörð Bjarmason6d4b5742017-05-25 19:45:29 +0000468static void compile_pcre1_regexp(struct grep_pat *p, const struct grep_opt *opt)
Michał Kiedrowicz63e7e9d2011-05-09 23:52:05 +0200469{
470 die("cannot use Perl-compatible regexes when not compiled with USE_LIBPCRE");
471}
472
Ævar Arnfjörð Bjarmason6d4b5742017-05-25 19:45:29 +0000473static int pcre1match(struct grep_pat *p, const char *line, const char *eol,
Michał Kiedrowicz63e7e9d2011-05-09 23:52:05 +0200474 regmatch_t *match, int eflags)
475{
476 return 1;
477}
478
Ævar Arnfjörð Bjarmason6d4b5742017-05-25 19:45:29 +0000479static void free_pcre1_regexp(struct grep_pat *p)
Michał Kiedrowicz63e7e9d2011-05-09 23:52:05 +0200480{
481}
Ævar Arnfjörð Bjarmason3485bea2017-05-25 19:45:28 +0000482#endif /* !USE_LIBPCRE1 */
Michał Kiedrowicz63e7e9d2011-05-09 23:52:05 +0200483
Ævar Arnfjörð Bjarmason94da9192017-06-01 18:20:56 +0000484#ifdef USE_LIBPCRE2
485static void compile_pcre2_pattern(struct grep_pat *p, const struct grep_opt *opt)
486{
487 int error;
488 PCRE2_UCHAR errbuf[256];
489 PCRE2_SIZE erroffset;
490 int options = PCRE2_MULTILINE;
491 const uint8_t *character_tables = NULL;
492 int jitret;
Ævar Arnfjörð Bjarmasona25b9082017-11-23 14:16:58 +0000493 int patinforet;
494 size_t jitsizearg;
Ævar Arnfjörð Bjarmason94da9192017-06-01 18:20:56 +0000495
496 assert(opt->pcre2);
497
498 p->pcre2_compile_context = NULL;
499
500 if (opt->ignore_case) {
501 if (has_non_ascii(p->pattern)) {
502 character_tables = pcre2_maketables(NULL);
503 p->pcre2_compile_context = pcre2_compile_context_create(NULL);
504 pcre2_set_character_tables(p->pcre2_compile_context, character_tables);
505 }
506 options |= PCRE2_CASELESS;
507 }
508 if (is_utf8_locale() && has_non_ascii(p->pattern))
509 options |= PCRE2_UTF;
510
511 p->pcre2_pattern = pcre2_compile((PCRE2_SPTR)p->pattern,
512 p->patternlen, options, &error, &erroffset,
513 p->pcre2_compile_context);
514
515 if (p->pcre2_pattern) {
516 p->pcre2_match_data = pcre2_match_data_create_from_pattern(p->pcre2_pattern, NULL);
517 if (!p->pcre2_match_data)
518 die("Couldn't allocate PCRE2 match data");
519 } else {
520 pcre2_get_error_message(error, errbuf, sizeof(errbuf));
521 compile_regexp_failed(p, (const char *)&errbuf);
522 }
523
524 pcre2_config(PCRE2_CONFIG_JIT, &p->pcre2_jit_on);
525 if (p->pcre2_jit_on == 1) {
526 jitret = pcre2_jit_compile(p->pcre2_pattern, PCRE2_JIT_COMPLETE);
527 if (jitret)
528 die("Couldn't JIT the PCRE2 pattern '%s', got '%d'\n", p->pattern, jitret);
Ævar Arnfjörð Bjarmasona25b9082017-11-23 14:16:58 +0000529
530 /*
531 * The pcre2_config(PCRE2_CONFIG_JIT, ...) call just
532 * tells us whether the library itself supports JIT,
533 * but to see whether we're going to be actually using
534 * JIT we need to extract PCRE2_INFO_JITSIZE from the
535 * pattern *after* we do pcre2_jit_compile() above.
536 *
537 * This is because if the pattern contains the
538 * (*NO_JIT) verb (see pcre2syntax(3))
539 * pcre2_jit_compile() will exit early with 0. If we
540 * then proceed to call pcre2_jit_match() further down
541 * the line instead of pcre2_match() we'll either
542 * segfault (pre PCRE 10.31) or run into a fatal error
543 * (post PCRE2 10.31)
544 */
545 patinforet = pcre2_pattern_info(p->pcre2_pattern, PCRE2_INFO_JITSIZE, &jitsizearg);
546 if (patinforet)
547 BUG("pcre2_pattern_info() failed: %d", patinforet);
548 if (jitsizearg == 0) {
549 p->pcre2_jit_on = 0;
550 return;
551 }
552
Ævar Arnfjörð Bjarmason94da9192017-06-01 18:20:56 +0000553 p->pcre2_jit_stack = pcre2_jit_stack_create(1, 1024 * 1024, NULL);
554 if (!p->pcre2_jit_stack)
555 die("Couldn't allocate PCRE2 JIT stack");
556 p->pcre2_match_context = pcre2_match_context_create(NULL);
Ævar Arnfjörð Bjarmason674ad932017-06-19 22:01:48 +0000557 if (!p->pcre2_match_context)
Ævar Arnfjörð Bjarmason94da9192017-06-01 18:20:56 +0000558 die("Couldn't allocate PCRE2 match context");
559 pcre2_jit_stack_assign(p->pcre2_match_context, NULL, p->pcre2_jit_stack);
560 } else if (p->pcre2_jit_on != 0) {
Johannes Schindelin033abf92018-05-02 11:38:39 +0200561 BUG("The pcre2_jit_on variable should be 0 or 1, not %d",
Ævar Arnfjörð Bjarmason94da9192017-06-01 18:20:56 +0000562 p->pcre1_jit_on);
563 }
564}
565
566static int pcre2match(struct grep_pat *p, const char *line, const char *eol,
567 regmatch_t *match, int eflags)
568{
569 int ret, flags = 0;
570 PCRE2_SIZE *ovector;
571 PCRE2_UCHAR errbuf[256];
572
573 if (eflags & REG_NOTBOL)
574 flags |= PCRE2_NOTBOL;
575
576 if (p->pcre2_jit_on)
577 ret = pcre2_jit_match(p->pcre2_pattern, (unsigned char *)line,
578 eol - line, 0, flags, p->pcre2_match_data,
579 NULL);
580 else
581 ret = pcre2_match(p->pcre2_pattern, (unsigned char *)line,
582 eol - line, 0, flags, p->pcre2_match_data,
583 NULL);
584
585 if (ret < 0 && ret != PCRE2_ERROR_NOMATCH) {
586 pcre2_get_error_message(ret, errbuf, sizeof(errbuf));
587 die("%s failed with error code %d: %s",
588 (p->pcre2_jit_on ? "pcre2_jit_match" : "pcre2_match"), ret,
589 errbuf);
590 }
591 if (ret > 0) {
592 ovector = pcre2_get_ovector_pointer(p->pcre2_match_data);
593 ret = 0;
594 match->rm_so = (int)ovector[0];
595 match->rm_eo = (int)ovector[1];
596 }
597
598 return ret;
599}
600
601static void free_pcre2_pattern(struct grep_pat *p)
602{
603 pcre2_compile_context_free(p->pcre2_compile_context);
604 pcre2_code_free(p->pcre2_pattern);
605 pcre2_match_data_free(p->pcre2_match_data);
606 pcre2_jit_stack_free(p->pcre2_jit_stack);
607 pcre2_match_context_free(p->pcre2_match_context);
608}
609#else /* !USE_LIBPCRE2 */
610static void compile_pcre2_pattern(struct grep_pat *p, const struct grep_opt *opt)
611{
612 /*
613 * Unreachable until USE_LIBPCRE2 becomes synonymous with
614 * USE_LIBPCRE. See the sibling comment in
615 * grep_set_pattern_type_option().
616 */
617 die("cannot use Perl-compatible regexes when not compiled with USE_LIBPCRE");
618}
619
620static int pcre2match(struct grep_pat *p, const char *line, const char *eol,
621 regmatch_t *match, int eflags)
622{
623 return 1;
624}
625
626static void free_pcre2_pattern(struct grep_pat *p)
627{
628}
629#endif /* !USE_LIBPCRE2 */
630
Nguyễn Thái Ngọc Duy793dc672016-06-25 07:22:31 +0200631static void compile_fixed_regexp(struct grep_pat *p, struct grep_opt *opt)
632{
633 struct strbuf sb = STRBUF_INIT;
634 int err;
Ævar Arnfjörð Bjarmason1ceabab2017-06-29 22:22:22 +0000635 int regflags = 0;
Nguyễn Thái Ngọc Duy793dc672016-06-25 07:22:31 +0200636
637 basic_regex_quote_buf(&sb, p->pattern);
Nguyễn Thái Ngọc Duy793dc672016-06-25 07:22:31 +0200638 if (opt->ignore_case)
639 regflags |= REG_ICASE;
640 err = regcomp(&p->regexp, sb.buf, regflags);
641 if (opt->debug)
642 fprintf(stderr, "fixed %s\n", sb.buf);
643 strbuf_release(&sb);
644 if (err) {
645 char errbuf[1024];
646 regerror(err, &p->regexp, errbuf, sizeof(errbuf));
Nguyễn Thái Ngọc Duy793dc672016-06-25 07:22:31 +0200647 compile_regexp_failed(p, errbuf);
648 }
649}
650
Junio C Hamano83b5d2f2006-09-17 16:02:52 -0700651static void compile_regexp(struct grep_pat *p, struct grep_opt *opt)
652{
Ævar Arnfjörð Bjarmason07a3d412017-06-29 22:22:21 +0000653 int ascii_only;
René Scharfec8222552009-01-10 00:18:34 +0100654 int err;
Ævar Arnfjörð Bjarmason07a3d412017-06-29 22:22:21 +0000655 int regflags = REG_NEWLINE;
René Scharfec8222552009-01-10 00:18:34 +0100656
René Scharfed7eb5272009-03-07 13:28:40 +0100657 p->word_regexp = opt->word_regexp;
Brian Collins5183bf62009-11-06 01:22:35 -0800658 p->ignore_case = opt->ignore_case;
Nguyễn Thái Ngọc Duy5c1ebcc2016-06-25 07:22:30 +0200659 ascii_only = !has_non_ascii(p->pattern);
René Scharfed7eb5272009-03-07 13:28:40 +0100660
Nguyễn Thái Ngọc Duy793dc672016-06-25 07:22:31 +0200661 /*
662 * Even when -F (fixed) asks us to do a non-regexp search, we
663 * may not be able to correctly case-fold when -i
664 * (ignore-case) is asked (in which case, we'll synthesize a
665 * regexp to match the pattern that matches regexp special
666 * characters literally, while ignoring case differences). On
667 * the other hand, even without -F, if the pattern does not
668 * have any regexp special characters and there is no need for
669 * case-folding search, we can internally turn it into a
670 * simple string match using kws. p->fixed tells us if we
671 * want to use kws.
672 */
Ævar Arnfjörð Bjarmason219e65b2017-05-25 19:45:27 +0000673 if (opt->fixed ||
674 has_null(p->pattern, p->patternlen) ||
675 is_fixed(p->pattern, p->patternlen))
Ævar Arnfjörð Bjarmason07a3d412017-06-29 22:22:21 +0000676 p->fixed = !p->ignore_case || ascii_only;
Fredrik Kuivinen9ecedde2011-08-21 00:42:18 +0200677
678 if (p->fixed) {
Ævar Arnfjörð Bjarmason07a3d412017-06-29 22:22:21 +0000679 p->kws = kwsalloc(p->ignore_case ? tolower_trans_tbl : NULL);
Fredrik Kuivinen9ecedde2011-08-21 00:42:18 +0200680 kwsincr(p->kws, p->pattern, p->patternlen);
681 kwsprep(p->kws);
René Scharfec8222552009-01-10 00:18:34 +0100682 return;
Nguyễn Thái Ngọc Duy793dc672016-06-25 07:22:31 +0200683 } else if (opt->fixed) {
684 /*
685 * We come here when the pattern has the non-ascii
686 * characters we cannot case-fold, and asked to
687 * ignore-case.
688 */
689 compile_fixed_regexp(p, opt);
690 return;
Fredrik Kuivinen9ecedde2011-08-21 00:42:18 +0200691 }
René Scharfec8222552009-01-10 00:18:34 +0100692
Ævar Arnfjörð Bjarmason94da9192017-06-01 18:20:56 +0000693 if (opt->pcre2) {
694 compile_pcre2_pattern(p, opt);
695 return;
696 }
697
Ævar Arnfjörð Bjarmason6d4b5742017-05-25 19:45:29 +0000698 if (opt->pcre1) {
699 compile_pcre1_regexp(p, opt);
Michał Kiedrowicz63e7e9d2011-05-09 23:52:05 +0200700 return;
701 }
702
Ævar Arnfjörð Bjarmason07a3d412017-06-29 22:22:21 +0000703 if (p->ignore_case)
704 regflags |= REG_ICASE;
705 if (opt->extended_regexp_option)
706 regflags |= REG_EXTENDED;
707 err = regcomp(&p->regexp, p->pattern, regflags);
Junio C Hamano83b5d2f2006-09-17 16:02:52 -0700708 if (err) {
709 char errbuf[1024];
Junio C Hamano83b5d2f2006-09-17 16:02:52 -0700710 regerror(err, &p->regexp, errbuf, 1024);
Michał Kiedrowicza30c1482011-05-09 23:52:04 +0200711 compile_regexp_failed(p, errbuf);
Junio C Hamano83b5d2f2006-09-17 16:02:52 -0700712 }
713}
714
Junio C Hamano0ab7bef2006-09-27 17:50:52 -0700715static struct grep_expr *compile_pattern_or(struct grep_pat **);
Junio C Hamano83b5d2f2006-09-17 16:02:52 -0700716static struct grep_expr *compile_pattern_atom(struct grep_pat **list)
717{
718 struct grep_pat *p;
719 struct grep_expr *x;
720
721 p = *list;
Linus Torvaldsc922b012009-04-27 11:10:24 -0700722 if (!p)
723 return NULL;
Junio C Hamano83b5d2f2006-09-17 16:02:52 -0700724 switch (p->token) {
725 case GREP_PATTERN: /* atom */
Junio C Hamano480c1ca2006-09-20 12:39:46 -0700726 case GREP_PATTERN_HEAD:
727 case GREP_PATTERN_BODY:
Junio C Hamano83b5d2f2006-09-17 16:02:52 -0700728 x = xcalloc(1, sizeof (struct grep_expr));
729 x->node = GREP_NODE_ATOM;
730 x->u.atom = p;
731 *list = p->next;
732 return x;
733 case GREP_OPEN_PAREN:
734 *list = p->next;
Junio C Hamano0ab7bef2006-09-27 17:50:52 -0700735 x = compile_pattern_or(list);
Junio C Hamano83b5d2f2006-09-17 16:02:52 -0700736 if (!*list || (*list)->token != GREP_CLOSE_PAREN)
737 die("unmatched parenthesis");
738 *list = (*list)->next;
739 return x;
740 default:
741 return NULL;
742 }
743}
744
745static struct grep_expr *compile_pattern_not(struct grep_pat **list)
746{
747 struct grep_pat *p;
748 struct grep_expr *x;
749
750 p = *list;
Linus Torvaldsc922b012009-04-27 11:10:24 -0700751 if (!p)
752 return NULL;
Junio C Hamano83b5d2f2006-09-17 16:02:52 -0700753 switch (p->token) {
754 case GREP_NOT:
755 if (!p->next)
756 die("--not not followed by pattern expression");
757 *list = p->next;
758 x = xcalloc(1, sizeof (struct grep_expr));
759 x->node = GREP_NODE_NOT;
760 x->u.unary = compile_pattern_not(list);
761 if (!x->u.unary)
762 die("--not followed by non pattern expression");
763 return x;
764 default:
765 return compile_pattern_atom(list);
766 }
767}
768
769static struct grep_expr *compile_pattern_and(struct grep_pat **list)
770{
771 struct grep_pat *p;
772 struct grep_expr *x, *y, *z;
773
774 x = compile_pattern_not(list);
775 p = *list;
776 if (p && p->token == GREP_AND) {
777 if (!p->next)
778 die("--and not followed by pattern expression");
779 *list = p->next;
780 y = compile_pattern_and(list);
781 if (!y)
782 die("--and not followed by pattern expression");
783 z = xcalloc(1, sizeof (struct grep_expr));
784 z->node = GREP_NODE_AND;
785 z->u.binary.left = x;
786 z->u.binary.right = y;
787 return z;
788 }
789 return x;
790}
791
792static struct grep_expr *compile_pattern_or(struct grep_pat **list)
793{
794 struct grep_pat *p;
795 struct grep_expr *x, *y, *z;
796
797 x = compile_pattern_and(list);
798 p = *list;
799 if (x && p && p->token != GREP_CLOSE_PAREN) {
800 y = compile_pattern_or(list);
801 if (!y)
802 die("not a pattern expression %s", p->pattern);
803 z = xcalloc(1, sizeof (struct grep_expr));
804 z->node = GREP_NODE_OR;
805 z->u.binary.left = x;
806 z->u.binary.right = y;
807 return z;
808 }
809 return x;
810}
811
812static struct grep_expr *compile_pattern_expr(struct grep_pat **list)
813{
814 return compile_pattern_or(list);
815}
816
Junio C Hamano17bf35a2012-09-13 14:21:44 -0700817static void indent(int in)
818{
819 while (in-- > 0)
820 fputc(' ', stderr);
821}
822
823static void dump_grep_pat(struct grep_pat *p)
824{
825 switch (p->token) {
826 case GREP_AND: fprintf(stderr, "*and*"); break;
827 case GREP_OPEN_PAREN: fprintf(stderr, "*(*"); break;
828 case GREP_CLOSE_PAREN: fprintf(stderr, "*)*"); break;
829 case GREP_NOT: fprintf(stderr, "*not*"); break;
830 case GREP_OR: fprintf(stderr, "*or*"); break;
831
832 case GREP_PATTERN: fprintf(stderr, "pattern"); break;
833 case GREP_PATTERN_HEAD: fprintf(stderr, "pattern_head"); break;
834 case GREP_PATTERN_BODY: fprintf(stderr, "pattern_body"); break;
835 }
836
837 switch (p->token) {
838 default: break;
839 case GREP_PATTERN_HEAD:
840 fprintf(stderr, "<head %d>", p->field); break;
841 case GREP_PATTERN_BODY:
842 fprintf(stderr, "<body>"); break;
843 }
844 switch (p->token) {
845 default: break;
846 case GREP_PATTERN_HEAD:
847 case GREP_PATTERN_BODY:
848 case GREP_PATTERN:
849 fprintf(stderr, "%.*s", (int)p->patternlen, p->pattern);
850 break;
851 }
852 fputc('\n', stderr);
853}
854
855static void dump_grep_expression_1(struct grep_expr *x, int in)
856{
857 indent(in);
858 switch (x->node) {
859 case GREP_NODE_TRUE:
860 fprintf(stderr, "true\n");
861 break;
862 case GREP_NODE_ATOM:
863 dump_grep_pat(x->u.atom);
864 break;
865 case GREP_NODE_NOT:
866 fprintf(stderr, "(not\n");
867 dump_grep_expression_1(x->u.unary, in+1);
868 indent(in);
869 fprintf(stderr, ")\n");
870 break;
871 case GREP_NODE_AND:
872 fprintf(stderr, "(and\n");
873 dump_grep_expression_1(x->u.binary.left, in+1);
874 dump_grep_expression_1(x->u.binary.right, in+1);
875 indent(in);
876 fprintf(stderr, ")\n");
877 break;
878 case GREP_NODE_OR:
879 fprintf(stderr, "(or\n");
880 dump_grep_expression_1(x->u.binary.left, in+1);
881 dump_grep_expression_1(x->u.binary.right, in+1);
882 indent(in);
883 fprintf(stderr, ")\n");
884 break;
885 }
886}
887
Junio C Hamano07a7d652012-09-15 14:04:36 -0700888static void dump_grep_expression(struct grep_opt *opt)
Junio C Hamano17bf35a2012-09-13 14:21:44 -0700889{
890 struct grep_expr *x = opt->pattern_expression;
891
892 if (opt->all_match)
893 fprintf(stderr, "[all-match]\n");
894 dump_grep_expression_1(x, 0);
895 fflush(NULL);
896}
897
Junio C Hamano5aaeb732010-09-12 22:15:35 -0700898static struct grep_expr *grep_true_expr(void)
899{
900 struct grep_expr *z = xcalloc(1, sizeof(*z));
901 z->node = GREP_NODE_TRUE;
902 return z;
903}
904
905static struct grep_expr *grep_or_expr(struct grep_expr *left, struct grep_expr *right)
906{
907 struct grep_expr *z = xcalloc(1, sizeof(*z));
908 z->node = GREP_NODE_OR;
909 z->u.binary.left = left;
910 z->u.binary.right = right;
911 return z;
912}
913
Junio C Hamano95ce9ce2010-09-12 19:30:48 -0700914static struct grep_expr *prep_header_patterns(struct grep_opt *opt)
915{
916 struct grep_pat *p;
917 struct grep_expr *header_expr;
Junio C Hamano5aaeb732010-09-12 22:15:35 -0700918 struct grep_expr *(header_group[GREP_HEADER_FIELD_MAX]);
919 enum grep_header_field fld;
Junio C Hamano95ce9ce2010-09-12 19:30:48 -0700920
921 if (!opt->header_list)
922 return NULL;
Angus Hammond2385f242012-05-06 19:17:15 +0100923
Junio C Hamano95ce9ce2010-09-12 19:30:48 -0700924 for (p = opt->header_list; p; p = p->next) {
925 if (p->token != GREP_PATTERN_HEAD)
Johannes Schindelin033abf92018-05-02 11:38:39 +0200926 BUG("a non-header pattern in grep header list.");
Antoine Pelisse3ce3ffb2013-02-03 14:37:09 +0000927 if (p->field < GREP_HEADER_FIELD_MIN ||
928 GREP_HEADER_FIELD_MAX <= p->field)
Johannes Schindelin033abf92018-05-02 11:38:39 +0200929 BUG("unknown header field %d", p->field);
Junio C Hamano95ce9ce2010-09-12 19:30:48 -0700930 compile_regexp(p, opt);
931 }
Junio C Hamano5aaeb732010-09-12 22:15:35 -0700932
933 for (fld = 0; fld < GREP_HEADER_FIELD_MAX; fld++)
934 header_group[fld] = NULL;
935
936 for (p = opt->header_list; p; p = p->next) {
937 struct grep_expr *h;
938 struct grep_pat *pp = p;
939
940 h = compile_pattern_atom(&pp);
941 if (!h || pp != p->next)
Johannes Schindelin033abf92018-05-02 11:38:39 +0200942 BUG("malformed header expr");
Junio C Hamano5aaeb732010-09-12 22:15:35 -0700943 if (!header_group[p->field]) {
944 header_group[p->field] = h;
945 continue;
946 }
947 header_group[p->field] = grep_or_expr(h, header_group[p->field]);
948 }
949
950 header_expr = NULL;
951
952 for (fld = 0; fld < GREP_HEADER_FIELD_MAX; fld++) {
953 if (!header_group[fld])
954 continue;
955 if (!header_expr)
956 header_expr = grep_true_expr();
957 header_expr = grep_or_expr(header_group[fld], header_expr);
958 }
Junio C Hamano95ce9ce2010-09-12 19:30:48 -0700959 return header_expr;
960}
961
Junio C Hamano13e4fc72012-09-13 16:26:57 -0700962static struct grep_expr *grep_splice_or(struct grep_expr *x, struct grep_expr *y)
963{
964 struct grep_expr *z = x;
965
966 while (x) {
967 assert(x->node == GREP_NODE_OR);
968 if (x->u.binary.right &&
969 x->u.binary.right->node == GREP_NODE_TRUE) {
970 x->u.binary.right = y;
971 break;
972 }
973 x = x->u.binary.right;
974 }
975 return z;
976}
977
Junio C Hamano17bf35a2012-09-13 14:21:44 -0700978static void compile_grep_patterns_real(struct grep_opt *opt)
Junio C Hamano83b5d2f2006-09-17 16:02:52 -0700979{
980 struct grep_pat *p;
Junio C Hamano95ce9ce2010-09-12 19:30:48 -0700981 struct grep_expr *header_expr = prep_header_patterns(opt);
Junio C Hamano0ab7bef2006-09-27 17:50:52 -0700982
Junio C Hamano83b5d2f2006-09-17 16:02:52 -0700983 for (p = opt->pattern_list; p; p = p->next) {
Junio C Hamano480c1ca2006-09-20 12:39:46 -0700984 switch (p->token) {
985 case GREP_PATTERN: /* atom */
986 case GREP_PATTERN_HEAD:
987 case GREP_PATTERN_BODY:
René Scharfec8222552009-01-10 00:18:34 +0100988 compile_regexp(p, opt);
Junio C Hamano480c1ca2006-09-20 12:39:46 -0700989 break;
990 default:
Junio C Hamano83b5d2f2006-09-17 16:02:52 -0700991 opt->extended = 1;
Junio C Hamano480c1ca2006-09-20 12:39:46 -0700992 break;
993 }
Junio C Hamano83b5d2f2006-09-17 16:02:52 -0700994 }
995
Junio C Hamano80235ba2010-01-17 20:09:06 -0800996 if (opt->all_match || header_expr)
997 opt->extended = 1;
Junio C Hamano17bf35a2012-09-13 14:21:44 -0700998 else if (!opt->extended && !opt->debug)
Junio C Hamano83b5d2f2006-09-17 16:02:52 -0700999 return;
1000
Junio C Hamano83b5d2f2006-09-17 16:02:52 -07001001 p = opt->pattern_list;
Michele Ballabioba150a32009-03-18 21:53:27 +01001002 if (p)
1003 opt->pattern_expression = compile_pattern_expr(&p);
Junio C Hamano83b5d2f2006-09-17 16:02:52 -07001004 if (p)
1005 die("incomplete pattern expression: %s", p->pattern);
Junio C Hamano80235ba2010-01-17 20:09:06 -08001006
1007 if (!header_expr)
1008 return;
1009
Junio C Hamano5aaeb732010-09-12 22:15:35 -07001010 if (!opt->pattern_expression)
Junio C Hamano80235ba2010-01-17 20:09:06 -08001011 opt->pattern_expression = header_expr;
Junio C Hamano13e4fc72012-09-13 16:26:57 -07001012 else if (opt->all_match)
1013 opt->pattern_expression = grep_splice_or(header_expr,
1014 opt->pattern_expression);
Junio C Hamano5aaeb732010-09-12 22:15:35 -07001015 else
1016 opt->pattern_expression = grep_or_expr(opt->pattern_expression,
1017 header_expr);
Junio C Hamano80235ba2010-01-17 20:09:06 -08001018 opt->all_match = 1;
Junio C Hamano83b5d2f2006-09-17 16:02:52 -07001019}
1020
Junio C Hamano17bf35a2012-09-13 14:21:44 -07001021void compile_grep_patterns(struct grep_opt *opt)
1022{
1023 compile_grep_patterns_real(opt);
1024 if (opt->debug)
1025 dump_grep_expression(opt);
1026}
1027
Junio C Hamanob48fb5b2006-09-27 16:27:10 -07001028static void free_pattern_expr(struct grep_expr *x)
1029{
1030 switch (x->node) {
Junio C Hamano5aaeb732010-09-12 22:15:35 -07001031 case GREP_NODE_TRUE:
Junio C Hamanob48fb5b2006-09-27 16:27:10 -07001032 case GREP_NODE_ATOM:
1033 break;
1034 case GREP_NODE_NOT:
1035 free_pattern_expr(x->u.unary);
1036 break;
1037 case GREP_NODE_AND:
1038 case GREP_NODE_OR:
1039 free_pattern_expr(x->u.binary.left);
1040 free_pattern_expr(x->u.binary.right);
1041 break;
1042 }
1043 free(x);
1044}
1045
1046void free_grep_patterns(struct grep_opt *opt)
1047{
1048 struct grep_pat *p, *n;
1049
1050 for (p = opt->pattern_list; p; p = n) {
1051 n = p->next;
1052 switch (p->token) {
1053 case GREP_PATTERN: /* atom */
1054 case GREP_PATTERN_HEAD:
1055 case GREP_PATTERN_BODY:
Fredrik Kuivinen9ecedde2011-08-21 00:42:18 +02001056 if (p->kws)
1057 kwsfree(p->kws);
Ævar Arnfjörð Bjarmason6d4b5742017-05-25 19:45:29 +00001058 else if (p->pcre1_regexp)
1059 free_pcre1_regexp(p);
Ævar Arnfjörð Bjarmason94da9192017-06-01 18:20:56 +00001060 else if (p->pcre2_pattern)
1061 free_pcre2_pattern(p);
Michał Kiedrowicz63e7e9d2011-05-09 23:52:05 +02001062 else
1063 regfree(&p->regexp);
René Scharfe526a8582012-05-20 16:33:07 +02001064 free(p->pattern);
Junio C Hamanob48fb5b2006-09-27 16:27:10 -07001065 break;
1066 default:
1067 break;
1068 }
1069 free(p);
1070 }
1071
1072 if (!opt->extended)
1073 return;
1074 free_pattern_expr(opt->pattern_expression);
1075}
1076
Junio C Hamano83b5d2f2006-09-17 16:02:52 -07001077static char *end_of_line(char *cp, unsigned long *left)
1078{
1079 unsigned long l = *left;
1080 while (l && *cp != '\n') {
1081 l--;
1082 cp++;
1083 }
1084 *left = l;
1085 return cp;
1086}
1087
1088static int word_char(char ch)
1089{
1090 return isalnum(ch) || ch == '_';
1091}
1092
Mark Lodato55f638b2010-03-07 11:52:46 -05001093static void output_color(struct grep_opt *opt, const void *data, size_t size,
1094 const char *color)
1095{
Jeff Kingdaa0c3d2011-08-17 22:04:23 -07001096 if (want_color(opt->color) && color && color[0]) {
Mark Lodato55f638b2010-03-07 11:52:46 -05001097 opt->output(opt, color, strlen(color));
1098 opt->output(opt, data, size);
1099 opt->output(opt, GIT_COLOR_RESET, strlen(GIT_COLOR_RESET));
1100 } else
1101 opt->output(opt, data, size);
1102}
1103
1104static void output_sep(struct grep_opt *opt, char sign)
1105{
1106 if (opt->null_following_name)
1107 opt->output(opt, "\0", 1);
1108 else
Nguyễn Thái Ngọc Duyfa151dc2018-05-26 15:55:22 +02001109 output_color(opt, &sign, 1, opt->colors[GREP_COLOR_SEP]);
Mark Lodato55f638b2010-03-07 11:52:46 -05001110}
1111
Raphael Zimmerer83caecc2008-10-01 18:11:15 +02001112static void show_name(struct grep_opt *opt, const char *name)
1113{
Nguyễn Thái Ngọc Duyfa151dc2018-05-26 15:55:22 +02001114 output_color(opt, name, strlen(name), opt->colors[GREP_COLOR_FILENAME]);
Fredrik Kuivinen5b594f42010-01-25 23:51:39 +01001115 opt->output(opt, opt->null_following_name ? "\0" : "\n", 1);
Raphael Zimmerer83caecc2008-10-01 18:11:15 +02001116}
1117
René Scharfeed40a092010-05-22 23:43:43 +02001118static int fixmatch(struct grep_pat *p, char *line, char *eol,
1119 regmatch_t *match)
Junio C Hamano83b5d2f2006-09-17 16:02:52 -07001120{
Fredrik Kuivinen9ecedde2011-08-21 00:42:18 +02001121 struct kwsmatch kwsm;
1122 size_t offset = kwsexec(p->kws, line, eol - line, &kwsm);
1123 if (offset == -1) {
Junio C Hamano83b5d2f2006-09-17 16:02:52 -07001124 match->rm_so = match->rm_eo = -1;
1125 return REG_NOMATCH;
Fredrik Kuivinen9ecedde2011-08-21 00:42:18 +02001126 } else {
1127 match->rm_so = offset;
1128 match->rm_eo = match->rm_so + kwsm.size[0];
Junio C Hamano83b5d2f2006-09-17 16:02:52 -07001129 return 0;
1130 }
1131}
1132
Michał Kiedrowicz97e77782011-05-05 00:00:19 +02001133static int patmatch(struct grep_pat *p, char *line, char *eol,
1134 regmatch_t *match, int eflags)
1135{
1136 int hit;
1137
1138 if (p->fixed)
1139 hit = !fixmatch(p, line, eol, match);
Ævar Arnfjörð Bjarmason6d4b5742017-05-25 19:45:29 +00001140 else if (p->pcre1_regexp)
1141 hit = !pcre1match(p, line, eol, match, eflags);
Ævar Arnfjörð Bjarmason94da9192017-06-01 18:20:56 +00001142 else if (p->pcre2_pattern)
1143 hit = !pcre2match(p, line, eol, match, eflags);
Michał Kiedrowicz97e77782011-05-05 00:00:19 +02001144 else
Johannes Schindelinb7d36ff2016-09-21 20:24:14 +02001145 hit = !regexec_buf(&p->regexp, line, eol - line, 1, match,
1146 eflags);
Michał Kiedrowicz97e77782011-05-05 00:00:19 +02001147
1148 return hit;
1149}
1150
Junio C Hamanoa4d7d2c2008-09-04 22:15:02 -07001151static int strip_timestamp(char *bol, char **eol_p)
1152{
1153 char *eol = *eol_p;
1154 int ch;
1155
1156 while (bol < --eol) {
1157 if (*eol != '>')
1158 continue;
1159 *eol_p = ++eol;
1160 ch = *eol;
1161 *eol = '\0';
1162 return ch;
1163 }
1164 return 0;
1165}
1166
1167static struct {
1168 const char *field;
1169 size_t len;
1170} header_field[] = {
1171 { "author ", 7 },
1172 { "committer ", 10 },
Nguyễn Thái Ngọc Duy72fd13f2012-09-29 11:41:28 +07001173 { "reflog ", 7 },
Junio C Hamanoa4d7d2c2008-09-04 22:15:02 -07001174};
1175
René Scharfed7eb5272009-03-07 13:28:40 +01001176static int match_one_pattern(struct grep_pat *p, char *bol, char *eol,
René Scharfe79212772009-03-07 13:30:27 +01001177 enum grep_context ctx,
1178 regmatch_t *pmatch, int eflags)
Junio C Hamano83b5d2f2006-09-17 16:02:52 -07001179{
1180 int hit = 0;
Junio C Hamanoa4d7d2c2008-09-04 22:15:02 -07001181 int saved_ch = 0;
René Scharfee701fad2009-05-20 23:31:53 +02001182 const char *start = bol;
Junio C Hamano83b5d2f2006-09-17 16:02:52 -07001183
Junio C Hamano480c1ca2006-09-20 12:39:46 -07001184 if ((p->token != GREP_PATTERN) &&
1185 ((p->token == GREP_PATTERN_HEAD) != (ctx == GREP_CONTEXT_HEAD)))
1186 return 0;
1187
Junio C Hamanoa4d7d2c2008-09-04 22:15:02 -07001188 if (p->token == GREP_PATTERN_HEAD) {
1189 const char *field;
1190 size_t len;
1191 assert(p->field < ARRAY_SIZE(header_field));
1192 field = header_field[p->field].field;
1193 len = header_field[p->field].len;
1194 if (strncmp(bol, field, len))
1195 return 0;
1196 bol += len;
Nguyễn Thái Ngọc Duyad4813b2012-09-29 11:41:27 +07001197 switch (p->field) {
1198 case GREP_HEADER_AUTHOR:
1199 case GREP_HEADER_COMMITTER:
1200 saved_ch = strip_timestamp(bol, &eol);
1201 break;
1202 default:
1203 break;
1204 }
Junio C Hamanoa4d7d2c2008-09-04 22:15:02 -07001205 }
1206
Junio C Hamano83b5d2f2006-09-17 16:02:52 -07001207 again:
Michał Kiedrowicz97e77782011-05-05 00:00:19 +02001208 hit = patmatch(p, bol, eol, pmatch, eflags);
Junio C Hamano83b5d2f2006-09-17 16:02:52 -07001209
René Scharfed7eb5272009-03-07 13:28:40 +01001210 if (hit && p->word_regexp) {
Junio C Hamano83b5d2f2006-09-17 16:02:52 -07001211 if ((pmatch[0].rm_so < 0) ||
René Scharfe84201ea2009-06-03 18:19:01 +02001212 (eol - bol) < pmatch[0].rm_so ||
Junio C Hamano83b5d2f2006-09-17 16:02:52 -07001213 (pmatch[0].rm_eo < 0) ||
1214 (eol - bol) < pmatch[0].rm_eo)
1215 die("regexp returned nonsense");
1216
1217 /* Match beginning must be either beginning of the
1218 * line, or at word boundary (i.e. the last char must
1219 * not be a word char). Similarly, match end must be
1220 * either end of the line, or at word boundary
1221 * (i.e. the next char must not be a word char).
1222 */
René Scharfefb62eb72009-01-10 00:08:40 +01001223 if ( ((pmatch[0].rm_so == 0) ||
Junio C Hamano83b5d2f2006-09-17 16:02:52 -07001224 !word_char(bol[pmatch[0].rm_so-1])) &&
1225 ((pmatch[0].rm_eo == (eol-bol)) ||
1226 !word_char(bol[pmatch[0].rm_eo])) )
1227 ;
1228 else
1229 hit = 0;
1230
René Scharfe84201ea2009-06-03 18:19:01 +02001231 /* Words consist of at least one character. */
1232 if (pmatch->rm_so == pmatch->rm_eo)
1233 hit = 0;
1234
Junio C Hamano83b5d2f2006-09-17 16:02:52 -07001235 if (!hit && pmatch[0].rm_so + bol + 1 < eol) {
1236 /* There could be more than one match on the
1237 * line, and the first match might not be
1238 * strict word match. But later ones could be!
René Scharfefb62eb72009-01-10 00:08:40 +01001239 * Forward to the next possible start, i.e. the
1240 * next position following a non-word char.
Junio C Hamano83b5d2f2006-09-17 16:02:52 -07001241 */
1242 bol = pmatch[0].rm_so + bol + 1;
René Scharfefb62eb72009-01-10 00:08:40 +01001243 while (word_char(bol[-1]) && bol < eol)
1244 bol++;
René Scharfedbb6a4a2009-05-23 13:45:26 +02001245 eflags |= REG_NOTBOL;
René Scharfefb62eb72009-01-10 00:08:40 +01001246 if (bol < eol)
1247 goto again;
Junio C Hamano83b5d2f2006-09-17 16:02:52 -07001248 }
1249 }
Junio C Hamanoa4d7d2c2008-09-04 22:15:02 -07001250 if (p->token == GREP_PATTERN_HEAD && saved_ch)
1251 *eol = saved_ch;
René Scharfee701fad2009-05-20 23:31:53 +02001252 if (hit) {
1253 pmatch[0].rm_so += bol - start;
1254 pmatch[0].rm_eo += bol - start;
1255 }
Junio C Hamano83b5d2f2006-09-17 16:02:52 -07001256 return hit;
1257}
1258
Taylor Blau68d686e2018-06-22 10:49:35 -05001259static int match_expr_eval(struct grep_opt *opt, struct grep_expr *x, char *bol,
1260 char *eol, enum grep_context ctx, ssize_t *col,
1261 ssize_t *icol, int collect_hits)
Junio C Hamano83b5d2f2006-09-17 16:02:52 -07001262{
Junio C Hamano0ab7bef2006-09-27 17:50:52 -07001263 int h = 0;
1264
Linus Torvaldsc922b012009-04-27 11:10:24 -07001265 if (!x)
1266 die("Not a valid grep expression");
Junio C Hamano83b5d2f2006-09-17 16:02:52 -07001267 switch (x->node) {
Junio C Hamano5aaeb732010-09-12 22:15:35 -07001268 case GREP_NODE_TRUE:
1269 h = 1;
1270 break;
Junio C Hamano83b5d2f2006-09-17 16:02:52 -07001271 case GREP_NODE_ATOM:
Taylor Blau68d686e2018-06-22 10:49:35 -05001272 {
1273 regmatch_t tmp;
1274 h = match_one_pattern(x->u.atom, bol, eol, ctx,
1275 &tmp, 0);
1276 if (h && (*col < 0 || tmp.rm_so < *col))
1277 *col = tmp.rm_so;
1278 }
Junio C Hamano83b5d2f2006-09-17 16:02:52 -07001279 break;
1280 case GREP_NODE_NOT:
Taylor Blau68d686e2018-06-22 10:49:35 -05001281 /*
1282 * Upon visiting a GREP_NODE_NOT, col and icol become swapped.
1283 */
1284 h = !match_expr_eval(opt, x->u.unary, bol, eol, ctx, icol, col,
1285 0);
Junio C Hamano0ab7bef2006-09-27 17:50:52 -07001286 break;
Junio C Hamano83b5d2f2006-09-17 16:02:52 -07001287 case GREP_NODE_AND:
Taylor Blau017c0fc2018-06-22 10:49:39 -05001288 h = match_expr_eval(opt, x->u.binary.left, bol, eol, ctx, col,
Taylor Blau68d686e2018-06-22 10:49:35 -05001289 icol, 0);
Taylor Blau017c0fc2018-06-22 10:49:39 -05001290 if (h || opt->columnnum) {
1291 /*
1292 * Don't short-circuit AND when given --column, since a
1293 * NOT earlier in the tree may turn this into an OR. In
1294 * this case, see the below comment.
1295 */
1296 h &= match_expr_eval(opt, x->u.binary.right, bol, eol,
1297 ctx, col, icol, 0);
1298 }
Junio C Hamano0ab7bef2006-09-27 17:50:52 -07001299 break;
Junio C Hamano83b5d2f2006-09-17 16:02:52 -07001300 case GREP_NODE_OR:
Taylor Blau017c0fc2018-06-22 10:49:39 -05001301 if (!(collect_hits || opt->columnnum)) {
1302 /*
1303 * Don't short-circuit OR when given --column (or
1304 * collecting hits) to ensure we don't skip a later
1305 * child that would produce an earlier match.
1306 */
Taylor Blau68d686e2018-06-22 10:49:35 -05001307 return (match_expr_eval(opt, x->u.binary.left, bol, eol,
1308 ctx, col, icol, 0) ||
1309 match_expr_eval(opt, x->u.binary.right, bol,
1310 eol, ctx, col, icol, 0));
Taylor Blau017c0fc2018-06-22 10:49:39 -05001311 }
Taylor Blau68d686e2018-06-22 10:49:35 -05001312 h = match_expr_eval(opt, x->u.binary.left, bol, eol, ctx, col,
1313 icol, 0);
Taylor Blau017c0fc2018-06-22 10:49:39 -05001314 if (collect_hits)
1315 x->u.binary.left->hit |= h;
Taylor Blau68d686e2018-06-22 10:49:35 -05001316 h |= match_expr_eval(opt, x->u.binary.right, bol, eol, ctx, col,
Taylor Blau017c0fc2018-06-22 10:49:39 -05001317 icol, collect_hits);
Junio C Hamano0ab7bef2006-09-27 17:50:52 -07001318 break;
1319 default:
Alexander Potashevd7530702009-01-04 21:38:41 +03001320 die("Unexpected node type (internal error) %d", x->node);
Junio C Hamano83b5d2f2006-09-17 16:02:52 -07001321 }
Junio C Hamano0ab7bef2006-09-27 17:50:52 -07001322 if (collect_hits)
1323 x->hit |= h;
1324 return h;
Junio C Hamano83b5d2f2006-09-17 16:02:52 -07001325}
1326
Junio C Hamano480c1ca2006-09-20 12:39:46 -07001327static int match_expr(struct grep_opt *opt, char *bol, char *eol,
Taylor Blau68d686e2018-06-22 10:49:35 -05001328 enum grep_context ctx, ssize_t *col,
1329 ssize_t *icol, int collect_hits)
Junio C Hamano83b5d2f2006-09-17 16:02:52 -07001330{
1331 struct grep_expr *x = opt->pattern_expression;
Taylor Blau68d686e2018-06-22 10:49:35 -05001332 return match_expr_eval(opt, x, bol, eol, ctx, col, icol, collect_hits);
Junio C Hamano83b5d2f2006-09-17 16:02:52 -07001333}
1334
Junio C Hamano480c1ca2006-09-20 12:39:46 -07001335static int match_line(struct grep_opt *opt, char *bol, char *eol,
Taylor Blau68d686e2018-06-22 10:49:35 -05001336 ssize_t *col, ssize_t *icol,
Junio C Hamano0ab7bef2006-09-27 17:50:52 -07001337 enum grep_context ctx, int collect_hits)
Junio C Hamano83b5d2f2006-09-17 16:02:52 -07001338{
1339 struct grep_pat *p;
Taylor Blau017c0fc2018-06-22 10:49:39 -05001340 int hit = 0;
René Scharfe79212772009-03-07 13:30:27 +01001341
Junio C Hamano83b5d2f2006-09-17 16:02:52 -07001342 if (opt->extended)
Taylor Blau68d686e2018-06-22 10:49:35 -05001343 return match_expr(opt, bol, eol, ctx, col, icol,
1344 collect_hits);
Junio C Hamano0ab7bef2006-09-27 17:50:52 -07001345
1346 /* we do not call with collect_hits without being extended */
Junio C Hamano83b5d2f2006-09-17 16:02:52 -07001347 for (p = opt->pattern_list; p; p = p->next) {
Taylor Blau68d686e2018-06-22 10:49:35 -05001348 regmatch_t tmp;
1349 if (match_one_pattern(p, bol, eol, ctx, &tmp, 0)) {
Taylor Blau017c0fc2018-06-22 10:49:39 -05001350 hit |= 1;
1351 if (!opt->columnnum) {
1352 /*
1353 * Without --column, any single match on a line
1354 * is enough to know that it needs to be
1355 * printed. With --column, scan _all_ patterns
1356 * to find the earliest.
1357 */
1358 break;
1359 }
1360 if (*col < 0 || tmp.rm_so < *col)
1361 *col = tmp.rm_so;
Taylor Blau68d686e2018-06-22 10:49:35 -05001362 }
Junio C Hamano83b5d2f2006-09-17 16:02:52 -07001363 }
Taylor Blau017c0fc2018-06-22 10:49:39 -05001364 return hit;
Junio C Hamano83b5d2f2006-09-17 16:02:52 -07001365}
1366
René Scharfe7e8f59d2009-03-07 13:32:32 +01001367static int match_next_pattern(struct grep_pat *p, char *bol, char *eol,
1368 enum grep_context ctx,
1369 regmatch_t *pmatch, int eflags)
1370{
1371 regmatch_t match;
1372
1373 if (!match_one_pattern(p, bol, eol, ctx, &match, eflags))
1374 return 0;
1375 if (match.rm_so < 0 || match.rm_eo < 0)
1376 return 0;
1377 if (pmatch->rm_so >= 0 && pmatch->rm_eo >= 0) {
1378 if (match.rm_so > pmatch->rm_so)
1379 return 1;
1380 if (match.rm_so == pmatch->rm_so && match.rm_eo < pmatch->rm_eo)
1381 return 1;
1382 }
1383 pmatch->rm_so = match.rm_so;
1384 pmatch->rm_eo = match.rm_eo;
1385 return 1;
1386}
1387
1388static int next_match(struct grep_opt *opt, char *bol, char *eol,
1389 enum grep_context ctx, regmatch_t *pmatch, int eflags)
1390{
1391 struct grep_pat *p;
1392 int hit = 0;
1393
1394 pmatch->rm_so = pmatch->rm_eo = -1;
1395 if (bol < eol) {
1396 for (p = opt->pattern_list; p; p = p->next) {
1397 switch (p->token) {
1398 case GREP_PATTERN: /* atom */
1399 case GREP_PATTERN_HEAD:
1400 case GREP_PATTERN_BODY:
1401 hit |= match_next_pattern(p, bol, eol, ctx,
1402 pmatch, eflags);
1403 break;
1404 default:
1405 break;
1406 }
1407 }
1408 }
1409 return hit;
1410}
1411
Taylor Blauc707ded2018-07-03 16:51:56 -05001412static void show_line_header(struct grep_opt *opt, const char *name,
1413 unsigned lno, ssize_t cno, char sign)
René Scharfe7e8f59d2009-03-07 13:32:32 +01001414{
René Scharfe1d84f722011-06-05 17:24:36 +02001415 if (opt->heading && opt->last_shown == 0) {
Nguyễn Thái Ngọc Duyfa151dc2018-05-26 15:55:22 +02001416 output_color(opt, name, strlen(name), opt->colors[GREP_COLOR_FILENAME]);
René Scharfe1d84f722011-06-05 17:24:36 +02001417 opt->output(opt, "\n", 1);
1418 }
René Scharfe5dd06d32009-07-02 00:02:38 +02001419 opt->last_shown = lno;
1420
René Scharfe1d84f722011-06-05 17:24:36 +02001421 if (!opt->heading && opt->pathname) {
Nguyễn Thái Ngọc Duyfa151dc2018-05-26 15:55:22 +02001422 output_color(opt, name, strlen(name), opt->colors[GREP_COLOR_FILENAME]);
Mark Lodato55f638b2010-03-07 11:52:46 -05001423 output_sep(opt, sign);
Fredrik Kuivinen5b594f42010-01-25 23:51:39 +01001424 }
1425 if (opt->linenum) {
1426 char buf[32];
Jeff King1a168e52017-03-28 15:46:56 -04001427 xsnprintf(buf, sizeof(buf), "%d", lno);
Nguyễn Thái Ngọc Duyfa151dc2018-05-26 15:55:22 +02001428 output_color(opt, buf, strlen(buf), opt->colors[GREP_COLOR_LINENO]);
Mark Lodato55f638b2010-03-07 11:52:46 -05001429 output_sep(opt, sign);
Fredrik Kuivinen5b594f42010-01-25 23:51:39 +01001430 }
Taylor Blau89252cd2018-06-22 10:49:42 -05001431 /*
1432 * Treat 'cno' as the 1-indexed offset from the start of a non-context
1433 * line to its first match. Otherwise, 'cno' is 0 indicating that we are
1434 * being called with a context line.
1435 */
1436 if (opt->columnnum && cno) {
1437 char buf[32];
1438 xsnprintf(buf, sizeof(buf), "%"PRIuMAX, (uintmax_t)cno);
Junio C Hamanod036d662018-07-18 12:20:31 -07001439 output_color(opt, buf, strlen(buf), opt->colors[GREP_COLOR_COLUMNNO]);
Taylor Blau89252cd2018-06-22 10:49:42 -05001440 output_sep(opt, sign);
1441 }
Taylor Blauc707ded2018-07-03 16:51:56 -05001442}
1443
1444static void show_line(struct grep_opt *opt, char *bol, char *eol,
1445 const char *name, unsigned lno, ssize_t cno, char sign)
1446{
1447 int rest = eol - bol;
Taylor Blau9d8db062018-07-09 15:33:47 -05001448 const char *match_color = NULL;
1449 const char *line_color = NULL;
Taylor Blauc707ded2018-07-03 16:51:56 -05001450
1451 if (opt->file_break && opt->last_shown == 0) {
1452 if (opt->show_hunk_mark)
1453 opt->output(opt, "\n", 1);
1454 } else if (opt->pre_context || opt->post_context || opt->funcbody) {
1455 if (opt->last_shown == 0) {
1456 if (opt->show_hunk_mark) {
Junio C Hamano87ece7c2018-08-02 15:30:44 -07001457 output_color(opt, "--", 2, opt->colors[GREP_COLOR_SEP]);
Taylor Blauc707ded2018-07-03 16:51:56 -05001458 opt->output(opt, "\n", 1);
1459 }
1460 } else if (lno > opt->last_shown + 1) {
Junio C Hamano87ece7c2018-08-02 15:30:44 -07001461 output_color(opt, "--", 2, opt->colors[GREP_COLOR_SEP]);
Taylor Blauc707ded2018-07-03 16:51:56 -05001462 opt->output(opt, "\n", 1);
1463 }
1464 }
Taylor Blau9d8db062018-07-09 15:33:47 -05001465 if (!opt->only_matching) {
1466 /*
1467 * In case the line we're being called with contains more than
1468 * one match, leave printing each header to the loop below.
1469 */
1470 show_line_header(opt, name, lno, cno, sign);
1471 }
1472 if (opt->color || opt->only_matching) {
René Scharfe7e8f59d2009-03-07 13:32:32 +01001473 regmatch_t match;
1474 enum grep_context ctx = GREP_CONTEXT_BODY;
1475 int ch = *eol;
1476 int eflags = 0;
1477
Taylor Blau9d8db062018-07-09 15:33:47 -05001478 if (opt->color) {
1479 if (sign == ':')
Junio C Hamano87ece7c2018-08-02 15:30:44 -07001480 match_color = opt->colors[GREP_COLOR_MATCH_SELECTED];
Taylor Blau9d8db062018-07-09 15:33:47 -05001481 else
Junio C Hamano87ece7c2018-08-02 15:30:44 -07001482 match_color = opt->colors[GREP_COLOR_MATCH_CONTEXT];
Taylor Blau9d8db062018-07-09 15:33:47 -05001483 if (sign == ':')
Junio C Hamano87ece7c2018-08-02 15:30:44 -07001484 line_color = opt->colors[GREP_COLOR_SELECTED];
Taylor Blau9d8db062018-07-09 15:33:47 -05001485 else if (sign == '-')
Junio C Hamano87ece7c2018-08-02 15:30:44 -07001486 line_color = opt->colors[GREP_COLOR_CONTEXT];
Taylor Blau9d8db062018-07-09 15:33:47 -05001487 else if (sign == '=')
Junio C Hamano87ece7c2018-08-02 15:30:44 -07001488 line_color = opt->colors[GREP_COLOR_FUNCTION];
Taylor Blau9d8db062018-07-09 15:33:47 -05001489 }
René Scharfe7e8f59d2009-03-07 13:32:32 +01001490 *eol = '\0';
1491 while (next_match(opt, bol, eol, ctx, &match, eflags)) {
René Scharfe1f5b9cc2009-06-01 23:53:05 +02001492 if (match.rm_so == match.rm_eo)
1493 break;
Fredrik Kuivinen5b594f42010-01-25 23:51:39 +01001494
Taylor Blau9d8db062018-07-09 15:33:47 -05001495 if (opt->only_matching)
1496 show_line_header(opt, name, lno, cno, sign);
1497 else
1498 output_color(opt, bol, match.rm_so, line_color);
Mark Lodato55f638b2010-03-07 11:52:46 -05001499 output_color(opt, bol + match.rm_so,
René Scharfe79a77102014-10-27 19:23:05 +01001500 match.rm_eo - match.rm_so, match_color);
Taylor Blau9d8db062018-07-09 15:33:47 -05001501 if (opt->only_matching)
1502 opt->output(opt, "\n", 1);
René Scharfe7e8f59d2009-03-07 13:32:32 +01001503 bol += match.rm_eo;
Taylor Blau9d8db062018-07-09 15:33:47 -05001504 cno += match.rm_eo;
René Scharfe7e8f59d2009-03-07 13:32:32 +01001505 rest -= match.rm_eo;
1506 eflags = REG_NOTBOL;
1507 }
1508 *eol = ch;
1509 }
Taylor Blau9d8db062018-07-09 15:33:47 -05001510 if (!opt->only_matching) {
1511 output_color(opt, bol, rest, line_color);
1512 opt->output(opt, "\n", 1);
1513 }
René Scharfe7e8f59d2009-03-07 13:32:32 +01001514}
1515
Thomas Rast0579f912011-12-12 22:16:07 +01001516#ifndef NO_PTHREADS
Jeff King78db6ea2012-02-02 03:18:29 -05001517int grep_use_locks;
1518
Thomas Rast0579f912011-12-12 22:16:07 +01001519/*
1520 * This lock protects access to the gitattributes machinery, which is
1521 * not thread-safe.
1522 */
1523pthread_mutex_t grep_attr_mutex;
1524
Jeff King78db6ea2012-02-02 03:18:29 -05001525static inline void grep_attr_lock(void)
Thomas Rast0579f912011-12-12 22:16:07 +01001526{
Jeff King78db6ea2012-02-02 03:18:29 -05001527 if (grep_use_locks)
Thomas Rast0579f912011-12-12 22:16:07 +01001528 pthread_mutex_lock(&grep_attr_mutex);
1529}
1530
Jeff King78db6ea2012-02-02 03:18:29 -05001531static inline void grep_attr_unlock(void)
Thomas Rast0579f912011-12-12 22:16:07 +01001532{
Jeff King78db6ea2012-02-02 03:18:29 -05001533 if (grep_use_locks)
Thomas Rast0579f912011-12-12 22:16:07 +01001534 pthread_mutex_unlock(&grep_attr_mutex);
1535}
Jeff Kingb3aeb282012-02-02 03:18:41 -05001536
1537/*
1538 * Same as git_attr_mutex, but protecting the thread-unsafe object db access.
1539 */
1540pthread_mutex_t grep_read_mutex;
1541
Thomas Rast0579f912011-12-12 22:16:07 +01001542#else
Jeff King78db6ea2012-02-02 03:18:29 -05001543#define grep_attr_lock()
1544#define grep_attr_unlock()
Thomas Rast0579f912011-12-12 22:16:07 +01001545#endif
1546
Jeff Kinge1327022012-02-02 03:19:28 -05001547static int match_funcname(struct grep_opt *opt, struct grep_source *gs, char *bol, char *eol)
René Scharfe2944e4e2009-07-02 00:06:34 +02001548{
René Scharfe60ecac92009-07-02 00:07:24 +02001549 xdemitconf_t *xecfg = opt->priv;
Thomas Rast0579f912011-12-12 22:16:07 +01001550 if (xecfg && !xecfg->find_func) {
Nguyễn Thái Ngọc Duyacd00ea2018-09-21 17:57:33 +02001551 grep_source_load_driver(gs, opt->repo->index);
Jeff King94ad9d92012-02-02 03:20:43 -05001552 if (gs->driver->funcname.pattern) {
1553 const struct userdiff_funcname *pe = &gs->driver->funcname;
Thomas Rast0579f912011-12-12 22:16:07 +01001554 xdiff_set_find_func(xecfg, pe->pattern, pe->cflags);
1555 } else {
1556 xecfg = opt->priv = NULL;
1557 }
1558 }
1559
1560 if (xecfg) {
René Scharfe60ecac92009-07-02 00:07:24 +02001561 char buf[1];
1562 return xecfg->find_func(bol, eol - bol, buf, 1,
1563 xecfg->find_func_priv) >= 0;
1564 }
1565
René Scharfe2944e4e2009-07-02 00:06:34 +02001566 if (bol == eol)
1567 return 0;
1568 if (isalpha(*bol) || *bol == '_' || *bol == '$')
1569 return 1;
1570 return 0;
1571}
1572
Jeff Kinge1327022012-02-02 03:19:28 -05001573static void show_funcname_line(struct grep_opt *opt, struct grep_source *gs,
1574 char *bol, unsigned lno)
René Scharfe2944e4e2009-07-02 00:06:34 +02001575{
Jeff Kinge1327022012-02-02 03:19:28 -05001576 while (bol > gs->buf) {
René Scharfe2944e4e2009-07-02 00:06:34 +02001577 char *eol = --bol;
1578
Jeff Kinge1327022012-02-02 03:19:28 -05001579 while (bol > gs->buf && bol[-1] != '\n')
René Scharfe2944e4e2009-07-02 00:06:34 +02001580 bol--;
1581 lno--;
1582
1583 if (lno <= opt->last_shown)
1584 break;
1585
Jeff Kinge1327022012-02-02 03:19:28 -05001586 if (match_funcname(opt, gs, bol, eol)) {
Taylor Blau89252cd2018-06-22 10:49:42 -05001587 show_line(opt, bol, eol, gs->name, lno, 0, '=');
René Scharfe2944e4e2009-07-02 00:06:34 +02001588 break;
1589 }
1590 }
1591}
1592
René Scharfea5dc20b2017-11-18 19:08:08 +01001593static int is_empty_line(const char *bol, const char *eol);
1594
Jeff Kinge1327022012-02-02 03:19:28 -05001595static void show_pre_context(struct grep_opt *opt, struct grep_source *gs,
René Scharfeba8ea742011-08-01 19:20:53 +02001596 char *bol, char *end, unsigned lno)
René Scharfe49de3212009-07-02 00:05:17 +02001597{
René Scharfe6653a012017-11-18 19:07:13 +01001598 unsigned cur = lno, from = 1, funcname_lno = 0, orig_from;
René Scharfea5dc20b2017-11-18 19:08:08 +01001599 int funcname_needed = !!opt->funcname, comment_needed = 0;
René Scharfeba8ea742011-08-01 19:20:53 +02001600
René Scharfe49de3212009-07-02 00:05:17 +02001601 if (opt->pre_context < lno)
1602 from = lno - opt->pre_context;
1603 if (from <= opt->last_shown)
1604 from = opt->last_shown + 1;
René Scharfe6653a012017-11-18 19:07:13 +01001605 orig_from = from;
René Scharfea5dc20b2017-11-18 19:08:08 +01001606 if (opt->funcbody) {
1607 if (match_funcname(opt, gs, bol, end))
1608 comment_needed = 1;
1609 else
1610 funcname_needed = 1;
René Scharfe6653a012017-11-18 19:07:13 +01001611 from = opt->last_shown + 1;
1612 }
René Scharfe49de3212009-07-02 00:05:17 +02001613
1614 /* Rewind. */
René Scharfe6653a012017-11-18 19:07:13 +01001615 while (bol > gs->buf && cur > from) {
René Scharfea5dc20b2017-11-18 19:08:08 +01001616 char *next_bol = bol;
René Scharfe2944e4e2009-07-02 00:06:34 +02001617 char *eol = --bol;
1618
Jeff Kinge1327022012-02-02 03:19:28 -05001619 while (bol > gs->buf && bol[-1] != '\n')
René Scharfe49de3212009-07-02 00:05:17 +02001620 bol--;
1621 cur--;
René Scharfea5dc20b2017-11-18 19:08:08 +01001622 if (comment_needed && (is_empty_line(bol, eol) ||
1623 match_funcname(opt, gs, bol, eol))) {
1624 comment_needed = 0;
1625 from = orig_from;
1626 if (cur < from) {
1627 cur++;
1628 bol = next_bol;
1629 break;
1630 }
1631 }
Jeff Kinge1327022012-02-02 03:19:28 -05001632 if (funcname_needed && match_funcname(opt, gs, bol, eol)) {
René Scharfe2944e4e2009-07-02 00:06:34 +02001633 funcname_lno = cur;
1634 funcname_needed = 0;
René Scharfea5dc20b2017-11-18 19:08:08 +01001635 if (opt->funcbody)
1636 comment_needed = 1;
1637 else
1638 from = orig_from;
René Scharfe2944e4e2009-07-02 00:06:34 +02001639 }
René Scharfe49de3212009-07-02 00:05:17 +02001640 }
1641
René Scharfe2944e4e2009-07-02 00:06:34 +02001642 /* We need to look even further back to find a function signature. */
1643 if (opt->funcname && funcname_needed)
Jeff Kinge1327022012-02-02 03:19:28 -05001644 show_funcname_line(opt, gs, bol, cur);
René Scharfe2944e4e2009-07-02 00:06:34 +02001645
René Scharfe49de3212009-07-02 00:05:17 +02001646 /* Back forward. */
1647 while (cur < lno) {
René Scharfe2944e4e2009-07-02 00:06:34 +02001648 char *eol = bol, sign = (cur == funcname_lno) ? '=' : '-';
René Scharfe49de3212009-07-02 00:05:17 +02001649
1650 while (*eol != '\n')
1651 eol++;
Taylor Blau89252cd2018-06-22 10:49:42 -05001652 show_line(opt, bol, eol, gs->name, cur, 0, sign);
René Scharfe49de3212009-07-02 00:05:17 +02001653 bol = eol + 1;
1654 cur++;
1655 }
1656}
1657
Junio C Hamanoa26345b2010-01-10 22:39:36 -08001658static int should_lookahead(struct grep_opt *opt)
1659{
1660 struct grep_pat *p;
1661
1662 if (opt->extended)
1663 return 0; /* punt for too complex stuff */
1664 if (opt->invert)
1665 return 0;
1666 for (p = opt->pattern_list; p; p = p->next) {
1667 if (p->token != GREP_PATTERN)
1668 return 0; /* punt for "header only" and stuff */
1669 }
1670 return 1;
1671}
1672
1673static int look_ahead(struct grep_opt *opt,
1674 unsigned long *left_p,
1675 unsigned *lno_p,
1676 char **bol_p)
1677{
1678 unsigned lno = *lno_p;
1679 char *bol = *bol_p;
1680 struct grep_pat *p;
1681 char *sp, *last_bol;
1682 regoff_t earliest = -1;
1683
1684 for (p = opt->pattern_list; p; p = p->next) {
1685 int hit;
1686 regmatch_t m;
1687
Michał Kiedrowicz97e77782011-05-05 00:00:19 +02001688 hit = patmatch(p, bol, bol + *left_p, &m, 0);
Junio C Hamanoa26345b2010-01-10 22:39:36 -08001689 if (!hit || m.rm_so < 0 || m.rm_eo < 0)
1690 continue;
1691 if (earliest < 0 || m.rm_so < earliest)
1692 earliest = m.rm_so;
1693 }
1694
1695 if (earliest < 0) {
1696 *bol_p = bol + *left_p;
1697 *left_p = 0;
1698 return 1;
1699 }
1700 for (sp = bol + earliest; bol < sp && sp[-1] != '\n'; sp--)
1701 ; /* find the beginning of the line */
1702 last_bol = sp;
1703
1704 for (sp = bol; sp < last_bol; sp++) {
1705 if (*sp == '\n')
1706 lno++;
1707 }
1708 *left_p -= last_bol - bol;
1709 *bol_p = last_bol;
1710 *lno_p = lno;
1711 return 0;
1712}
1713
Nguyễn Thái Ngọc Duy38bbc2e2018-09-21 17:57:23 +02001714static int fill_textconv_grep(struct repository *r,
1715 struct userdiff_driver *driver,
Jeff King335ec3b2013-05-10 17:10:15 +02001716 struct grep_source *gs)
1717{
1718 struct diff_filespec *df;
1719 char *buf;
1720 size_t size;
1721
1722 if (!driver || !driver->textconv)
1723 return grep_source_load(gs);
1724
1725 /*
1726 * The textconv interface is intimately tied to diff_filespecs, so we
1727 * have to pretend to be one. If we could unify the grep_source
1728 * and diff_filespec structs, this mess could just go away.
1729 */
1730 df = alloc_filespec(gs->path);
1731 switch (gs->type) {
Brandon Williams1c41c822017-05-30 10:30:44 -07001732 case GREP_SOURCE_OID:
Jeff King335ec3b2013-05-10 17:10:15 +02001733 fill_filespec(df, gs->identifier, 1, 0100644);
1734 break;
1735 case GREP_SOURCE_FILE:
Brandon Williamsf9704c22017-05-30 10:30:50 -07001736 fill_filespec(df, &null_oid, 0, 0100644);
Jeff King335ec3b2013-05-10 17:10:15 +02001737 break;
1738 default:
Johannes Schindelin033abf92018-05-02 11:38:39 +02001739 BUG("attempt to textconv something without a path?");
Jeff King335ec3b2013-05-10 17:10:15 +02001740 }
1741
1742 /*
1743 * fill_textconv is not remotely thread-safe; it may load objects
1744 * behind the scenes, and it modifies the global diff tempfile
1745 * structure.
1746 */
1747 grep_read_lock();
Nguyễn Thái Ngọc Duy38bbc2e2018-09-21 17:57:23 +02001748 size = fill_textconv(r, driver, df, &buf);
Jeff King335ec3b2013-05-10 17:10:15 +02001749 grep_read_unlock();
1750 free_filespec(df);
1751
1752 /*
1753 * The normal fill_textconv usage by the diff machinery would just keep
1754 * the textconv'd buf separate from the diff_filespec. But much of the
1755 * grep code passes around a grep_source and assumes that its "buf"
1756 * pointer is the beginning of the thing we are searching. So let's
1757 * install our textconv'd version into the grep_source, taking care not
1758 * to leak any existing buffer.
1759 */
1760 grep_source_clear_data(gs);
1761 gs->buf = buf;
1762 gs->size = size;
1763
1764 return 0;
1765}
1766
René Scharfe4aa2c472016-05-28 17:06:19 +02001767static int is_empty_line(const char *bol, const char *eol)
1768{
1769 while (bol < eol && isspace(*bol))
1770 bol++;
1771 return bol == eol;
1772}
1773
Jeff Kinge1327022012-02-02 03:19:28 -05001774static int grep_source_1(struct grep_opt *opt, struct grep_source *gs, int collect_hits)
Junio C Hamano83b5d2f2006-09-17 16:02:52 -07001775{
Jeff Kinge1327022012-02-02 03:19:28 -05001776 char *bol;
René Scharfe4aa2c472016-05-28 17:06:19 +02001777 char *peek_bol = NULL;
Jeff Kinge1327022012-02-02 03:19:28 -05001778 unsigned long left;
Junio C Hamano83b5d2f2006-09-17 16:02:52 -07001779 unsigned lno = 1;
Junio C Hamano83b5d2f2006-09-17 16:02:52 -07001780 unsigned last_hit = 0;
Junio C Hamano83b5d2f2006-09-17 16:02:52 -07001781 int binary_match_only = 0;
Junio C Hamano83b5d2f2006-09-17 16:02:52 -07001782 unsigned count = 0;
Junio C Hamanoa26345b2010-01-10 22:39:36 -08001783 int try_lookahead = 0;
René Scharfeba8ea742011-08-01 19:20:53 +02001784 int show_function = 0;
Jeff King335ec3b2013-05-10 17:10:15 +02001785 struct userdiff_driver *textconv = NULL;
Junio C Hamano480c1ca2006-09-20 12:39:46 -07001786 enum grep_context ctx = GREP_CONTEXT_HEAD;
René Scharfe60ecac92009-07-02 00:07:24 +02001787 xdemitconf_t xecfg;
Junio C Hamano83b5d2f2006-09-17 16:02:52 -07001788
Fredrik Kuivinen5b594f42010-01-25 23:51:39 +01001789 if (!opt->output)
1790 opt->output = std_output;
1791
René Scharfeba8ea742011-08-01 19:20:53 +02001792 if (opt->pre_context || opt->post_context || opt->file_break ||
1793 opt->funcbody) {
René Scharfe08303c32011-06-05 17:24:15 +02001794 /* Show hunk marks, except for the first file. */
1795 if (opt->last_shown)
1796 opt->show_hunk_mark = 1;
1797 /*
1798 * If we're using threads then we can't easily identify
1799 * the first file. Always put hunk marks in that case
1800 * and skip the very first one later in work_done().
1801 */
1802 if (opt->output != std_output)
1803 opt->show_hunk_mark = 1;
1804 }
René Scharfe431d6e72010-03-15 17:21:10 +01001805 opt->last_shown = 0;
1806
Jeff King335ec3b2013-05-10 17:10:15 +02001807 if (opt->allow_textconv) {
Nguyễn Thái Ngọc Duyacd00ea2018-09-21 17:57:33 +02001808 grep_source_load_driver(gs, opt->repo->index);
Jeff King335ec3b2013-05-10 17:10:15 +02001809 /*
1810 * We might set up the shared textconv cache data here, which
1811 * is not thread-safe.
1812 */
1813 grep_attr_lock();
1814 textconv = userdiff_get_textconv(gs->driver);
1815 grep_attr_unlock();
1816 }
1817
1818 /*
1819 * We know the result of a textconv is text, so we only have to care
1820 * about binary handling if we are not using it.
1821 */
1822 if (!textconv) {
1823 switch (opt->binary) {
1824 case GREP_BINARY_DEFAULT:
Nguyễn Thái Ngọc Duyacd00ea2018-09-21 17:57:33 +02001825 if (grep_source_is_binary(gs, opt->repo->index))
Jeff King335ec3b2013-05-10 17:10:15 +02001826 binary_match_only = 1;
1827 break;
1828 case GREP_BINARY_NOMATCH:
Nguyễn Thái Ngọc Duyacd00ea2018-09-21 17:57:33 +02001829 if (grep_source_is_binary(gs, opt->repo->index))
Jeff King335ec3b2013-05-10 17:10:15 +02001830 return 0; /* Assume unmatch */
1831 break;
1832 case GREP_BINARY_TEXT:
1833 break;
1834 default:
Johannes Schindelin033abf92018-05-02 11:38:39 +02001835 BUG("unknown binary handling mode");
Jeff King335ec3b2013-05-10 17:10:15 +02001836 }
Junio C Hamano83b5d2f2006-09-17 16:02:52 -07001837 }
1838
René Scharfe60ecac92009-07-02 00:07:24 +02001839 memset(&xecfg, 0, sizeof(xecfg));
Thomas Rast0579f912011-12-12 22:16:07 +01001840 opt->priv = &xecfg;
1841
Junio C Hamanoa26345b2010-01-10 22:39:36 -08001842 try_lookahead = should_lookahead(opt);
René Scharfe60ecac92009-07-02 00:07:24 +02001843
Nguyễn Thái Ngọc Duy38bbc2e2018-09-21 17:57:23 +02001844 if (fill_textconv_grep(opt->repo, textconv, gs) < 0)
Jeff King08265792012-02-02 03:21:11 -05001845 return 0;
1846
Jeff Kinge1327022012-02-02 03:19:28 -05001847 bol = gs->buf;
1848 left = gs->size;
Junio C Hamano83b5d2f2006-09-17 16:02:52 -07001849 while (left) {
1850 char *eol, ch;
Junio C Hamano0ab7bef2006-09-27 17:50:52 -07001851 int hit;
Taylor Blau89252cd2018-06-22 10:49:42 -05001852 ssize_t cno;
Taylor Blau68d686e2018-06-22 10:49:35 -05001853 ssize_t col = -1, icol = -1;
Junio C Hamano83b5d2f2006-09-17 16:02:52 -07001854
Junio C Hamanoa26345b2010-01-10 22:39:36 -08001855 /*
Michał Kiedrowicz8997da32011-05-09 23:52:03 +02001856 * look_ahead() skips quickly to the line that possibly
Junio C Hamanoa26345b2010-01-10 22:39:36 -08001857 * has the next hit; don't call it if we need to do
1858 * something more than just skipping the current line
1859 * in response to an unmatch for the current line. E.g.
1860 * inside a post-context window, we will show the current
1861 * line as a context around the previous hit when it
1862 * doesn't hit.
1863 */
1864 if (try_lookahead
1865 && !(last_hit
René Scharfeba8ea742011-08-01 19:20:53 +02001866 && (show_function ||
1867 lno <= last_hit + opt->post_context))
Junio C Hamanoa26345b2010-01-10 22:39:36 -08001868 && look_ahead(opt, &left, &lno, &bol))
1869 break;
Junio C Hamano83b5d2f2006-09-17 16:02:52 -07001870 eol = end_of_line(bol, &left);
1871 ch = *eol;
1872 *eol = 0;
1873
Junio C Hamano480c1ca2006-09-20 12:39:46 -07001874 if ((ctx == GREP_CONTEXT_HEAD) && (eol == bol))
1875 ctx = GREP_CONTEXT_BODY;
1876
Taylor Blau68d686e2018-06-22 10:49:35 -05001877 hit = match_line(opt, bol, eol, &col, &icol, ctx, collect_hits);
Junio C Hamano83b5d2f2006-09-17 16:02:52 -07001878 *eol = ch;
1879
Junio C Hamano0ab7bef2006-09-27 17:50:52 -07001880 if (collect_hits)
1881 goto next_line;
1882
Junio C Hamano83b5d2f2006-09-17 16:02:52 -07001883 /* "grep -v -e foo -e bla" should list lines
1884 * that do not have either, so inversion should
1885 * be done outside.
1886 */
1887 if (opt->invert)
1888 hit = !hit;
1889 if (opt->unmatch_name_only) {
1890 if (hit)
1891 return 0;
1892 goto next_line;
1893 }
1894 if (hit) {
1895 count++;
1896 if (opt->status_only)
1897 return 1;
René Scharfe321ffcc2010-05-22 23:30:48 +02001898 if (opt->name_only) {
Jeff Kinge1327022012-02-02 03:19:28 -05001899 show_name(opt, gs->name);
René Scharfe321ffcc2010-05-22 23:30:48 +02001900 return 1;
1901 }
René Scharfec30c10c2010-05-22 23:29:35 +02001902 if (opt->count)
1903 goto next_line;
Junio C Hamano83b5d2f2006-09-17 16:02:52 -07001904 if (binary_match_only) {
Fredrik Kuivinen5b594f42010-01-25 23:51:39 +01001905 opt->output(opt, "Binary file ", 12);
Jeff Kinge1327022012-02-02 03:19:28 -05001906 output_color(opt, gs->name, strlen(gs->name),
Nguyễn Thái Ngọc Duyfa151dc2018-05-26 15:55:22 +02001907 opt->colors[GREP_COLOR_FILENAME]);
Fredrik Kuivinen5b594f42010-01-25 23:51:39 +01001908 opt->output(opt, " matches\n", 9);
Junio C Hamano83b5d2f2006-09-17 16:02:52 -07001909 return 1;
1910 }
Junio C Hamano83b5d2f2006-09-17 16:02:52 -07001911 /* Hit at this line. If we haven't shown the
1912 * pre-context lines, we would need to show them.
Junio C Hamano83b5d2f2006-09-17 16:02:52 -07001913 */
René Scharfeba8ea742011-08-01 19:20:53 +02001914 if (opt->pre_context || opt->funcbody)
Jeff Kinge1327022012-02-02 03:19:28 -05001915 show_pre_context(opt, gs, bol, eol, lno);
René Scharfe2944e4e2009-07-02 00:06:34 +02001916 else if (opt->funcname)
Jeff Kinge1327022012-02-02 03:19:28 -05001917 show_funcname_line(opt, gs, bol, lno);
Taylor Blau89252cd2018-06-22 10:49:42 -05001918 cno = opt->invert ? icol : col;
1919 if (cno < 0) {
1920 /*
1921 * A negative cno indicates that there was no
1922 * match on the line. We are thus inverted and
1923 * being asked to show all lines that _don't_
1924 * match a given expression. Therefore, set cno
1925 * to 0 to suggest the whole line matches.
1926 */
1927 cno = 0;
1928 }
1929 show_line(opt, bol, eol, gs->name, lno, cno + 1, ':');
René Scharfe5dd06d32009-07-02 00:02:38 +02001930 last_hit = lno;
René Scharfeba8ea742011-08-01 19:20:53 +02001931 if (opt->funcbody)
1932 show_function = 1;
1933 goto next_line;
Junio C Hamano83b5d2f2006-09-17 16:02:52 -07001934 }
René Scharfe4aa2c472016-05-28 17:06:19 +02001935 if (show_function && (!peek_bol || peek_bol < bol)) {
1936 unsigned long peek_left = left;
1937 char *peek_eol = eol;
1938
1939 /*
1940 * Trailing empty lines are not interesting.
1941 * Peek past them to see if they belong to the
1942 * body of the current function.
1943 */
1944 peek_bol = bol;
1945 while (is_empty_line(peek_bol, peek_eol)) {
1946 peek_bol = peek_eol + 1;
1947 peek_eol = end_of_line(peek_bol, &peek_left);
1948 }
1949
1950 if (match_funcname(opt, gs, peek_bol, peek_eol))
1951 show_function = 0;
1952 }
René Scharfeba8ea742011-08-01 19:20:53 +02001953 if (show_function ||
1954 (last_hit && lno <= last_hit + opt->post_context)) {
Junio C Hamano83b5d2f2006-09-17 16:02:52 -07001955 /* If the last hit is within the post context,
1956 * we need to show this line.
1957 */
Taylor Blau89252cd2018-06-22 10:49:42 -05001958 show_line(opt, bol, eol, gs->name, lno, col + 1, '-');
Junio C Hamano83b5d2f2006-09-17 16:02:52 -07001959 }
Junio C Hamano83b5d2f2006-09-17 16:02:52 -07001960
1961 next_line:
1962 bol = eol + 1;
1963 if (!left)
1964 break;
1965 left--;
1966 lno++;
1967 }
1968
Junio C Hamano0ab7bef2006-09-27 17:50:52 -07001969 if (collect_hits)
1970 return 0;
Junio C Hamanob48fb5b2006-09-27 16:27:10 -07001971
Junio C Hamano83b5d2f2006-09-17 16:02:52 -07001972 if (opt->status_only)
Anthony Sottilee1f68c62017-08-17 18:38:51 -07001973 return opt->unmatch_name_only;
Junio C Hamano83b5d2f2006-09-17 16:02:52 -07001974 if (opt->unmatch_name_only) {
1975 /* We did not see any hit, so we want to show this */
Jeff Kinge1327022012-02-02 03:19:28 -05001976 show_name(opt, gs->name);
Junio C Hamano83b5d2f2006-09-17 16:02:52 -07001977 return 1;
1978 }
1979
René Scharfe60ecac92009-07-02 00:07:24 +02001980 xdiff_clear_find_func(&xecfg);
1981 opt->priv = NULL;
1982
Junio C Hamano83b5d2f2006-09-17 16:02:52 -07001983 /* NEEDSWORK:
1984 * The real "grep -c foo *.c" gives many "bar.c:0" lines,
1985 * which feels mostly useless but sometimes useful. Maybe
1986 * make it another option? For now suppress them.
1987 */
Fredrik Kuivinen5b594f42010-01-25 23:51:39 +01001988 if (opt->count && count) {
1989 char buf[32];
René Scharfef76d9472014-03-11 22:15:49 +01001990 if (opt->pathname) {
1991 output_color(opt, gs->name, strlen(gs->name),
Nguyễn Thái Ngọc Duyfa151dc2018-05-26 15:55:22 +02001992 opt->colors[GREP_COLOR_FILENAME]);
René Scharfef76d9472014-03-11 22:15:49 +01001993 output_sep(opt, ':');
1994 }
Jeff King1a168e52017-03-28 15:46:56 -04001995 xsnprintf(buf, sizeof(buf), "%u\n", count);
Fredrik Kuivinen5b594f42010-01-25 23:51:39 +01001996 opt->output(opt, buf, strlen(buf));
René Scharfec30c10c2010-05-22 23:29:35 +02001997 return 1;
Fredrik Kuivinen5b594f42010-01-25 23:51:39 +01001998 }
Junio C Hamano83b5d2f2006-09-17 16:02:52 -07001999 return !!last_hit;
2000}
2001
Junio C Hamano0ab7bef2006-09-27 17:50:52 -07002002static void clr_hit_marker(struct grep_expr *x)
2003{
2004 /* All-hit markers are meaningful only at the very top level
2005 * OR node.
2006 */
2007 while (1) {
2008 x->hit = 0;
2009 if (x->node != GREP_NODE_OR)
2010 return;
2011 x->u.binary.left->hit = 0;
2012 x = x->u.binary.right;
2013 }
2014}
2015
2016static int chk_hit_marker(struct grep_expr *x)
2017{
2018 /* Top level nodes have hit markers. See if they all are hits */
2019 while (1) {
2020 if (x->node != GREP_NODE_OR)
2021 return x->hit;
2022 if (!x->u.binary.left->hit)
2023 return 0;
2024 x = x->u.binary.right;
2025 }
2026}
2027
Jeff Kinge1327022012-02-02 03:19:28 -05002028int grep_source(struct grep_opt *opt, struct grep_source *gs)
Junio C Hamano0ab7bef2006-09-27 17:50:52 -07002029{
2030 /*
2031 * we do not have to do the two-pass grep when we do not check
2032 * buffer-wide "all-match".
2033 */
2034 if (!opt->all_match)
Jeff Kinge1327022012-02-02 03:19:28 -05002035 return grep_source_1(opt, gs, 0);
Junio C Hamano0ab7bef2006-09-27 17:50:52 -07002036
2037 /* Otherwise the toplevel "or" terms hit a bit differently.
2038 * We first clear hit markers from them.
2039 */
2040 clr_hit_marker(opt->pattern_expression);
Jeff Kinge1327022012-02-02 03:19:28 -05002041 grep_source_1(opt, gs, 1);
Junio C Hamano0ab7bef2006-09-27 17:50:52 -07002042
2043 if (!chk_hit_marker(opt->pattern_expression))
2044 return 0;
2045
Jeff Kinge1327022012-02-02 03:19:28 -05002046 return grep_source_1(opt, gs, 0);
2047}
2048
Jeff Kingc876d6d2012-02-02 03:20:10 -05002049int grep_buffer(struct grep_opt *opt, char *buf, unsigned long size)
Jeff Kinge1327022012-02-02 03:19:28 -05002050{
2051 struct grep_source gs;
2052 int r;
2053
Nguyễn Thái Ngọc Duy55c61682012-10-12 17:49:38 +07002054 grep_source_init(&gs, GREP_SOURCE_BUF, NULL, NULL, NULL);
Jeff Kinge1327022012-02-02 03:19:28 -05002055 gs.buf = buf;
2056 gs.size = size;
2057
2058 r = grep_source(opt, &gs);
2059
2060 grep_source_clear(&gs);
2061 return r;
2062}
2063
2064void grep_source_init(struct grep_source *gs, enum grep_source_type type,
Nguyễn Thái Ngọc Duy55c61682012-10-12 17:49:38 +07002065 const char *name, const char *path,
2066 const void *identifier)
Jeff Kinge1327022012-02-02 03:19:28 -05002067{
2068 gs->type = type;
Jeff King8c53f072015-01-12 20:59:09 -05002069 gs->name = xstrdup_or_null(name);
2070 gs->path = xstrdup_or_null(path);
Jeff Kinge1327022012-02-02 03:19:28 -05002071 gs->buf = NULL;
2072 gs->size = 0;
Jeff King94ad9d92012-02-02 03:20:43 -05002073 gs->driver = NULL;
Jeff Kinge1327022012-02-02 03:19:28 -05002074
2075 switch (type) {
2076 case GREP_SOURCE_FILE:
2077 gs->identifier = xstrdup(identifier);
2078 break;
Brandon Williams1c41c822017-05-30 10:30:44 -07002079 case GREP_SOURCE_OID:
2080 gs->identifier = oiddup(identifier);
Jeff Kinge1327022012-02-02 03:19:28 -05002081 break;
2082 case GREP_SOURCE_BUF:
2083 gs->identifier = NULL;
Brandon Williams4538eef2016-12-16 11:03:19 -08002084 break;
Jeff Kinge1327022012-02-02 03:19:28 -05002085 }
2086}
2087
2088void grep_source_clear(struct grep_source *gs)
2089{
Ævar Arnfjörð Bjarmason88ce3ef2017-06-15 23:15:49 +00002090 FREE_AND_NULL(gs->name);
2091 FREE_AND_NULL(gs->path);
2092 FREE_AND_NULL(gs->identifier);
Jeff Kinge1327022012-02-02 03:19:28 -05002093 grep_source_clear_data(gs);
2094}
2095
2096void grep_source_clear_data(struct grep_source *gs)
2097{
2098 switch (gs->type) {
2099 case GREP_SOURCE_FILE:
Brandon Williams1c41c822017-05-30 10:30:44 -07002100 case GREP_SOURCE_OID:
Ævar Arnfjörð Bjarmason6a83d902017-06-15 23:15:46 +00002101 FREE_AND_NULL(gs->buf);
Jeff Kinge1327022012-02-02 03:19:28 -05002102 gs->size = 0;
2103 break;
2104 case GREP_SOURCE_BUF:
2105 /* leave user-provided buf intact */
2106 break;
2107 }
2108}
2109
Brandon Williams1c41c822017-05-30 10:30:44 -07002110static int grep_source_load_oid(struct grep_source *gs)
Jeff Kinge1327022012-02-02 03:19:28 -05002111{
2112 enum object_type type;
2113
2114 grep_read_lock();
brian m. carlsonb4f5aca2018-03-12 02:27:53 +00002115 gs->buf = read_object_file(gs->identifier, &type, &gs->size);
Jeff Kinge1327022012-02-02 03:19:28 -05002116 grep_read_unlock();
2117
2118 if (!gs->buf)
2119 return error(_("'%s': unable to read %s"),
2120 gs->name,
Brandon Williams1c41c822017-05-30 10:30:44 -07002121 oid_to_hex(gs->identifier));
Jeff Kinge1327022012-02-02 03:19:28 -05002122 return 0;
2123}
2124
2125static int grep_source_load_file(struct grep_source *gs)
2126{
2127 const char *filename = gs->identifier;
2128 struct stat st;
2129 char *data;
2130 size_t size;
2131 int i;
2132
2133 if (lstat(filename, &st) < 0) {
2134 err_ret:
2135 if (errno != ENOENT)
Nguyễn Thái Ngọc Duy7645d8f2016-05-08 16:47:47 +07002136 error_errno(_("failed to stat '%s'"), filename);
Jeff Kinge1327022012-02-02 03:19:28 -05002137 return -1;
2138 }
2139 if (!S_ISREG(st.st_mode))
2140 return -1;
2141 size = xsize_t(st.st_size);
2142 i = open(filename, O_RDONLY);
2143 if (i < 0)
2144 goto err_ret;
Jeff King3733e692016-02-22 17:44:28 -05002145 data = xmallocz(size);
Jeff Kinge1327022012-02-02 03:19:28 -05002146 if (st.st_size != read_in_full(i, data, size)) {
Nguyễn Thái Ngọc Duy7645d8f2016-05-08 16:47:47 +07002147 error_errno(_("'%s': short read"), filename);
Jeff Kinge1327022012-02-02 03:19:28 -05002148 close(i);
2149 free(data);
2150 return -1;
2151 }
2152 close(i);
Jeff Kinge1327022012-02-02 03:19:28 -05002153
2154 gs->buf = data;
2155 gs->size = size;
2156 return 0;
2157}
2158
Junio C Hamano30833012012-09-20 14:20:09 -07002159static int grep_source_load(struct grep_source *gs)
Jeff Kinge1327022012-02-02 03:19:28 -05002160{
2161 if (gs->buf)
2162 return 0;
2163
2164 switch (gs->type) {
2165 case GREP_SOURCE_FILE:
2166 return grep_source_load_file(gs);
Brandon Williams1c41c822017-05-30 10:30:44 -07002167 case GREP_SOURCE_OID:
2168 return grep_source_load_oid(gs);
Jeff Kinge1327022012-02-02 03:19:28 -05002169 case GREP_SOURCE_BUF:
2170 return gs->buf ? 0 : -1;
2171 }
Johannes Schindelin033abf92018-05-02 11:38:39 +02002172 BUG("invalid grep_source type to load");
Junio C Hamano0ab7bef2006-09-27 17:50:52 -07002173}
Jeff King94ad9d92012-02-02 03:20:43 -05002174
Nguyễn Thái Ngọc Duyacd00ea2018-09-21 17:57:33 +02002175void grep_source_load_driver(struct grep_source *gs,
2176 struct index_state *istate)
Jeff King94ad9d92012-02-02 03:20:43 -05002177{
2178 if (gs->driver)
2179 return;
2180
2181 grep_attr_lock();
Nguyễn Thái Ngọc Duy55c61682012-10-12 17:49:38 +07002182 if (gs->path)
Nguyễn Thái Ngọc Duyacd00ea2018-09-21 17:57:33 +02002183 gs->driver = userdiff_find_by_path(istate, gs->path);
Jeff King94ad9d92012-02-02 03:20:43 -05002184 if (!gs->driver)
2185 gs->driver = userdiff_find_by_name("default");
2186 grep_attr_unlock();
2187}
Jeff King41b59bf2012-02-02 03:21:02 -05002188
Nguyễn Thái Ngọc Duyacd00ea2018-09-21 17:57:33 +02002189static int grep_source_is_binary(struct grep_source *gs,
2190 struct index_state *istate)
Jeff King41b59bf2012-02-02 03:21:02 -05002191{
Nguyễn Thái Ngọc Duyacd00ea2018-09-21 17:57:33 +02002192 grep_source_load_driver(gs, istate);
Jeff King41b59bf2012-02-02 03:21:02 -05002193 if (gs->driver->binary != -1)
2194 return gs->driver->binary;
2195
2196 if (!grep_source_load(gs))
2197 return buffer_is_binary(gs->buf, gs->size);
2198
2199 return 0;
2200}