2 * Copyright (C) 2005 Junio C Hamano
3 * Copyright (C) 2010 Google Inc.
8 #include "xdiff-interface.h"
11 typedef int (*pickaxe_fn)(struct diff_filepair *p, struct diff_options *o, regex_t *regexp, kwset_t kws);
13 static void pickaxe(struct diff_queue_struct *q, struct diff_options *o,
14 regex_t *regexp, kwset_t kws, pickaxe_fn fn)
17 struct diff_queue_struct outq;
19 DIFF_QUEUE_CLEAR(&outq);
21 if (o->pickaxe_opts & DIFF_PICKAXE_ALL) {
22 /* Showing the whole changeset if needle exists */
23 for (i = 0; i < q->nr; i++) {
24 struct diff_filepair *p = q->queue[i];
25 if (fn(p, o, regexp, kws))
26 return; /* do not munge the queue */
30 * Otherwise we will clear the whole queue by copying
31 * the empty outq at the end of this function, but
32 * first clear the current entries in the queue.
34 for (i = 0; i < q->nr; i++)
35 diff_free_filepair(q->queue[i]);
37 /* Showing only the filepairs that has the needle */
38 for (i = 0; i < q->nr; i++) {
39 struct diff_filepair *p = q->queue[i];
40 if (fn(p, o, regexp, kws))
43 diff_free_filepair(p);
56 static void diffgrep_consume(void *priv, char *line, unsigned long len)
58 struct diffgrep_cb *data = priv;
62 if (line[0] != '+' && line[0] != '-')
66 * NEEDSWORK: we should have a way to terminate the
70 /* Yuck -- line ought to be "const char *"! */
73 data->hit = !regexec(data->regexp, line + 1, 1, ®match, 0);
77 static void fill_one(struct diff_filespec *one,
78 mmfile_t *mf, struct userdiff_driver **textconv)
80 if (DIFF_FILE_VALID(one)) {
81 *textconv = get_textconv(one);
82 mf->size = fill_textconv(*textconv, one, &mf->ptr);
84 memset(mf, 0, sizeof(*mf));
88 static int diff_grep(struct diff_filepair *p, struct diff_options *o,
89 regex_t *regexp, kwset_t kws)
92 struct userdiff_driver *textconv_one = NULL;
93 struct userdiff_driver *textconv_two = NULL;
97 if (diff_unmodified_pair(p))
100 fill_one(p->one, &mf1, &textconv_one);
101 fill_one(p->two, &mf2, &textconv_two);
105 return 0; /* ignore unmerged */
106 /* created "two" -- does it have what we are looking for? */
107 hit = !regexec(regexp, p->two->data, 1, ®match, 0);
108 } else if (!mf2.ptr) {
109 /* removed "one" -- did it have what we are looking for? */
110 hit = !regexec(regexp, p->one->data, 1, ®match, 0);
113 * We have both sides; need to run textual diff and see if
114 * the pattern appears on added/deleted lines.
116 struct diffgrep_cb ecbdata;
120 memset(&xpp, 0, sizeof(xpp));
121 memset(&xecfg, 0, sizeof(xecfg));
122 ecbdata.regexp = regexp;
124 xecfg.ctxlen = o->context;
125 xecfg.interhunkctxlen = o->interhunkcontext;
126 xdi_diff_outf(&mf1, &mf2, diffgrep_consume, &ecbdata,
137 static void diffcore_pickaxe_grep(struct diff_options *o)
142 err = regcomp(®ex, o->pickaxe, REG_EXTENDED | REG_NEWLINE);
145 regerror(err, ®ex, errbuf, 1024);
147 die("invalid log-grep regex: %s", errbuf);
150 pickaxe(&diff_queued_diff, o, ®ex, NULL, diff_grep);
156 static unsigned int contains(struct diff_filespec *one, struct diff_options *o,
157 regex_t *regexp, kwset_t kws)
164 if (diff_populate_filespec(one, 0))
175 assert(data[sz] == '\0');
176 while (*data && !regexec(regexp, data, 1, ®match, flags)) {
178 data += regmatch.rm_eo;
179 if (*data && regmatch.rm_so == regmatch.rm_eo)
184 } else { /* Classic exact string match */
186 struct kwsmatch kwsm;
187 size_t offset = kwsexec(kws, data, sz, &kwsm);
192 found = data + offset;
193 sz -= found - data + kwsm.size[0];
194 data = found + kwsm.size[0];
198 diff_free_filespec_data(one);
202 static int has_changes(struct diff_filepair *p, struct diff_options *o,
203 regex_t *regexp, kwset_t kws)
205 if (!DIFF_FILE_VALID(p->one)) {
206 if (!DIFF_FILE_VALID(p->two))
207 return 0; /* ignore unmerged */
209 return contains(p->two, o, regexp, kws) != 0;
211 if (!DIFF_FILE_VALID(p->two))
212 return contains(p->one, o, regexp, kws) != 0;
213 if (!diff_unmodified_pair(p)) {
214 return contains(p->one, o, regexp, kws) !=
215 contains(p->two, o, regexp, kws);
220 static void diffcore_pickaxe_count(struct diff_options *o)
222 const char *needle = o->pickaxe;
223 int opts = o->pickaxe_opts;
224 unsigned long len = strlen(needle);
225 regex_t regex, *regexp = NULL;
228 if (opts & DIFF_PICKAXE_REGEX) {
230 err = regcomp(®ex, needle, REG_EXTENDED | REG_NEWLINE);
232 /* The POSIX.2 people are surely sick */
234 regerror(err, ®ex, errbuf, 1024);
236 die("invalid pickaxe regex: %s", errbuf);
240 kws = kwsalloc(NULL);
241 kwsincr(kws, needle, len);
245 pickaxe(&diff_queued_diff, o, regexp, kws, has_changes);
247 if (opts & DIFF_PICKAXE_REGEX)
254 void diffcore_pickaxe(struct diff_options *o)
256 /* Might want to warn when both S and G are on; I don't care... */
257 if (o->pickaxe_opts & DIFF_PICKAXE_KIND_G)
258 diffcore_pickaxe_grep(o);
260 diffcore_pickaxe_count(o);