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 int diff_grep(struct diff_filepair *p, struct diff_options *o,
78 regex_t *regexp, kwset_t kws)
81 struct userdiff_driver *textconv_one = NULL;
82 struct userdiff_driver *textconv_two = NULL;
86 if (diff_unmodified_pair(p))
89 if (DIFF_OPT_TST(o, ALLOW_TEXTCONV)) {
90 textconv_one = get_textconv(p->one);
91 textconv_two = get_textconv(p->two);
94 mf1.size = fill_textconv(textconv_one, p->one, &mf1.ptr);
95 mf2.size = fill_textconv(textconv_two, p->two, &mf2.ptr);
97 if (!DIFF_FILE_VALID(p->one)) {
98 if (!DIFF_FILE_VALID(p->two))
99 return 0; /* ignore unmerged */
100 /* created "two" -- does it have what we are looking for? */
101 hit = !regexec(regexp, mf2.ptr, 1, ®match, 0);
102 } else if (!DIFF_FILE_VALID(p->two)) {
103 /* removed "one" -- did it have what we are looking for? */
104 hit = !regexec(regexp, mf1.ptr, 1, ®match, 0);
107 * We have both sides; need to run textual diff and see if
108 * the pattern appears on added/deleted lines.
110 struct diffgrep_cb ecbdata;
114 memset(&xpp, 0, sizeof(xpp));
115 memset(&xecfg, 0, sizeof(xecfg));
116 ecbdata.regexp = regexp;
118 xecfg.ctxlen = o->context;
119 xecfg.interhunkctxlen = o->interhunkcontext;
120 xdi_diff_outf(&mf1, &mf2, diffgrep_consume, &ecbdata,
131 static void diffcore_pickaxe_grep(struct diff_options *o)
135 int cflags = REG_EXTENDED | REG_NEWLINE;
137 if (DIFF_OPT_TST(o, PICKAXE_IGNORE_CASE))
140 err = regcomp(®ex, o->pickaxe, cflags);
143 regerror(err, ®ex, errbuf, 1024);
145 die("invalid log-grep regex: %s", errbuf);
148 pickaxe(&diff_queued_diff, o, ®ex, NULL, diff_grep);
154 static unsigned int contains(mmfile_t *mf, struct diff_options *o,
155 regex_t *regexp, kwset_t kws)
169 assert(data[sz] == '\0');
170 while (*data && !regexec(regexp, data, 1, ®match, flags)) {
172 data += regmatch.rm_eo;
173 if (*data && regmatch.rm_so == regmatch.rm_eo)
178 } else { /* Classic exact string match */
180 struct kwsmatch kwsm;
181 size_t offset = kwsexec(kws, data, sz, &kwsm);
186 found = data + offset;
187 sz -= found - data + kwsm.size[0];
188 data = found + kwsm.size[0];
195 static int has_changes(struct diff_filepair *p, struct diff_options *o,
196 regex_t *regexp, kwset_t kws)
198 struct userdiff_driver *textconv_one = NULL;
199 struct userdiff_driver *textconv_two = NULL;
206 if (DIFF_OPT_TST(o, ALLOW_TEXTCONV)) {
207 textconv_one = get_textconv(p->one);
208 textconv_two = get_textconv(p->two);
212 * If we have an unmodified pair, we know that the count will be the
213 * same and don't even have to load the blobs. Unless textconv is in
214 * play, _and_ we are using two different textconv filters (e.g.,
215 * because a pair is an exact rename with different textconv attributes
216 * for each side, which might generate different content).
218 if (textconv_one == textconv_two && diff_unmodified_pair(p))
221 mf1.size = fill_textconv(textconv_one, p->one, &mf1.ptr);
222 mf2.size = fill_textconv(textconv_two, p->two, &mf2.ptr);
224 if (!DIFF_FILE_VALID(p->one)) {
225 if (!DIFF_FILE_VALID(p->two))
226 ret = 0; /* ignore unmerged */
228 ret = contains(&mf2, o, regexp, kws) != 0;
230 else if (!DIFF_FILE_VALID(p->two)) /* removed */
231 ret = contains(&mf1, o, regexp, kws) != 0;
233 ret = contains(&mf1, o, regexp, kws) !=
234 contains(&mf2, o, regexp, kws);
240 diff_free_filespec_data(p->one);
241 diff_free_filespec_data(p->two);
246 static void diffcore_pickaxe_count(struct diff_options *o)
248 const char *needle = o->pickaxe;
249 int opts = o->pickaxe_opts;
250 unsigned long len = strlen(needle);
251 regex_t regex, *regexp = NULL;
254 if (opts & DIFF_PICKAXE_REGEX) {
256 err = regcomp(®ex, needle, REG_EXTENDED | REG_NEWLINE);
258 /* The POSIX.2 people are surely sick */
260 regerror(err, ®ex, errbuf, 1024);
262 die("invalid pickaxe regex: %s", errbuf);
266 kws = kwsalloc(DIFF_OPT_TST(o, PICKAXE_IGNORE_CASE)
267 ? tolower_trans_tbl : NULL);
268 kwsincr(kws, needle, len);
272 pickaxe(&diff_queued_diff, o, regexp, kws, has_changes);
274 if (opts & DIFF_PICKAXE_REGEX)
281 void diffcore_pickaxe(struct diff_options *o)
283 /* Might want to warn when both S and G are on; I don't care... */
284 if (o->pickaxe_opts & DIFF_PICKAXE_KIND_G)
285 diffcore_pickaxe_grep(o);
287 diffcore_pickaxe_count(o);