/*
* Copyright (C) 2005 Junio C Hamano
+ * Copyright (C) 2010 Google Inc.
*/
#include "cache.h"
#include "diff.h"
#include "diffcore.h"
+#include "xdiff-interface.h"
+#include "kwset.h"
-static unsigned int contains(struct diff_filespec *one,
- const char *needle, unsigned long len,
- regex_t *regexp)
+typedef int (*pickaxe_fn)(mmfile_t *one, mmfile_t *two,
+ struct diff_options *o,
+ regex_t *regexp, kwset_t kws);
+
+struct diffgrep_cb {
+ regex_t *regexp;
+ int hit;
+};
+
+static void diffgrep_consume(void *priv, char *line, unsigned long len)
+{
+ struct diffgrep_cb *data = priv;
+ regmatch_t regmatch;
+ int hold;
+
+ if (line[0] != '+' && line[0] != '-')
+ return;
+ if (data->hit)
+ /*
+ * NEEDSWORK: we should have a way to terminate the
+ * caller early.
+ */
+ return;
+ /* Yuck -- line ought to be "const char *"! */
+ hold = line[len];
+ line[len] = '\0';
+ data->hit = !regexec(data->regexp, line + 1, 1, ®match, 0);
+ line[len] = hold;
+}
+
+static int diff_grep(mmfile_t *one, mmfile_t *two,
+ struct diff_options *o,
+ regex_t *regexp, kwset_t kws)
+{
+ regmatch_t regmatch;
+ struct diffgrep_cb ecbdata;
+ xpparam_t xpp;
+ xdemitconf_t xecfg;
+
+ if (!one)
+ return !regexec(regexp, two->ptr, 1, ®match, 0);
+ if (!two)
+ return !regexec(regexp, one->ptr, 1, ®match, 0);
+
+ /*
+ * We have both sides; need to run textual diff and see if
+ * the pattern appears on added/deleted lines.
+ */
+ memset(&xpp, 0, sizeof(xpp));
+ memset(&xecfg, 0, sizeof(xecfg));
+ ecbdata.regexp = regexp;
+ ecbdata.hit = 0;
+ xecfg.ctxlen = o->context;
+ xecfg.interhunkctxlen = o->interhunkcontext;
+ xdi_diff_outf(one, two, diffgrep_consume, &ecbdata,
+ &xpp, &xecfg);
+ return ecbdata.hit;
+}
+
+static unsigned int contains(mmfile_t *mf, regex_t *regexp, kwset_t kws)
{
unsigned int cnt;
unsigned long sz;
const char *data;
- if (diff_populate_filespec(one, 0))
- return 0;
- if (!len)
- return 0;
- sz = one->size;
- data = one->data;
+ sz = mf->size;
+ data = mf->ptr;
cnt = 0;
if (regexp) {
} else { /* Classic exact string match */
while (sz) {
- const char *found = memmem(data, sz, needle, len);
- if (!found)
+ struct kwsmatch kwsm;
+ size_t offset = kwsexec(kws, data, sz, &kwsm);
+ if (offset == -1)
break;
- sz -= found - data + len;
- data = found + len;
+ sz -= offset + kwsm.size[0];
+ data += offset + kwsm.size[0];
cnt++;
}
}
- diff_free_filespec_data(one);
return cnt;
}
-void diffcore_pickaxe(const char *needle, int opts)
+static int has_changes(mmfile_t *one, mmfile_t *two,
+ struct diff_options *o,
+ regex_t *regexp, kwset_t kws)
{
- struct diff_queue_struct *q = &diff_queued_diff;
- unsigned long len = strlen(needle);
- int i, has_changes;
- regex_t regex, *regexp = NULL;
- struct diff_queue_struct outq;
- outq.queue = NULL;
- outq.nr = outq.alloc = 0;
+ unsigned int one_contains = one ? contains(one, regexp, kws) : 0;
+ unsigned int two_contains = two ? contains(two, regexp, kws) : 0;
+ return one_contains != two_contains;
+}
- if (opts & DIFF_PICKAXE_REGEX) {
- int err;
- err = regcomp(®ex, needle, REG_EXTENDED | REG_NEWLINE);
- if (err) {
- /* The POSIX.2 people are surely sick */
- char errbuf[1024];
- regerror(err, ®ex, errbuf, 1024);
- regfree(®ex);
- die("invalid pickaxe regex: %s", errbuf);
- }
- regexp = ®ex;
+static int pickaxe_match(struct diff_filepair *p, struct diff_options *o,
+ regex_t *regexp, kwset_t kws, pickaxe_fn fn)
+{
+ struct userdiff_driver *textconv_one = NULL;
+ struct userdiff_driver *textconv_two = NULL;
+ mmfile_t mf1, mf2;
+ int ret;
+
+ if (!o->pickaxe[0])
+ return 0;
+
+ /* ignore unmerged */
+ if (!DIFF_FILE_VALID(p->one) && !DIFF_FILE_VALID(p->two))
+ return 0;
+
+ if (DIFF_OPT_TST(o, ALLOW_TEXTCONV)) {
+ textconv_one = get_textconv(p->one);
+ textconv_two = get_textconv(p->two);
}
- if (opts & DIFF_PICKAXE_ALL) {
+ /*
+ * If we have an unmodified pair, we know that the count will be the
+ * same and don't even have to load the blobs. Unless textconv is in
+ * play, _and_ we are using two different textconv filters (e.g.,
+ * because a pair is an exact rename with different textconv attributes
+ * for each side, which might generate different content).
+ */
+ if (textconv_one == textconv_two && diff_unmodified_pair(p))
+ return 0;
+
+ mf1.size = fill_textconv(textconv_one, p->one, &mf1.ptr);
+ mf2.size = fill_textconv(textconv_two, p->two, &mf2.ptr);
+
+ ret = fn(DIFF_FILE_VALID(p->one) ? &mf1 : NULL,
+ DIFF_FILE_VALID(p->two) ? &mf2 : NULL,
+ o, regexp, kws);
+
+ if (textconv_one)
+ free(mf1.ptr);
+ if (textconv_two)
+ free(mf2.ptr);
+ diff_free_filespec_data(p->one);
+ diff_free_filespec_data(p->two);
+
+ return ret;
+}
+
+static void pickaxe(struct diff_queue_struct *q, struct diff_options *o,
+ regex_t *regexp, kwset_t kws, pickaxe_fn fn)
+{
+ int i;
+ struct diff_queue_struct outq;
+
+ DIFF_QUEUE_CLEAR(&outq);
+
+ if (o->pickaxe_opts & DIFF_PICKAXE_ALL) {
/* Showing the whole changeset if needle exists */
- for (i = has_changes = 0; !has_changes && i < q->nr; i++) {
+ for (i = 0; i < q->nr; i++) {
struct diff_filepair *p = q->queue[i];
- if (!DIFF_FILE_VALID(p->one)) {
- if (!DIFF_FILE_VALID(p->two))
- continue; /* ignore unmerged */
- /* created */
- if (contains(p->two, needle, len, regexp))
- has_changes++;
- }
- else if (!DIFF_FILE_VALID(p->two)) {
- if (contains(p->one, needle, len, regexp))
- has_changes++;
- }
- else if (!diff_unmodified_pair(p) &&
- contains(p->one, needle, len, regexp) !=
- contains(p->two, needle, len, regexp))
- has_changes++;
+ if (pickaxe_match(p, o, regexp, kws, fn))
+ return; /* do not munge the queue */
}
- if (has_changes)
- return; /* not munge the queue */
- /* otherwise we will clear the whole queue
- * by copying the empty outq at the end of this
- * function, but first clear the current entries
- * in the queue.
+ /*
+ * Otherwise we will clear the whole queue by copying
+ * the empty outq at the end of this function, but
+ * first clear the current entries in the queue.
*/
for (i = 0; i < q->nr; i++)
diff_free_filepair(q->queue[i]);
- }
- else
+ } else {
/* Showing only the filepairs that has the needle */
for (i = 0; i < q->nr; i++) {
struct diff_filepair *p = q->queue[i];
- has_changes = 0;
- if (!DIFF_FILE_VALID(p->one)) {
- if (!DIFF_FILE_VALID(p->two))
- ; /* ignore unmerged */
- /* created */
- else if (contains(p->two, needle, len, regexp))
- has_changes = 1;
- }
- else if (!DIFF_FILE_VALID(p->two)) {
- if (contains(p->one, needle, len, regexp))
- has_changes = 1;
- }
- else if (!diff_unmodified_pair(p) &&
- contains(p->one, needle, len, regexp) !=
- contains(p->two, needle, len, regexp))
- has_changes = 1;
-
- if (has_changes)
+ if (pickaxe_match(p, o, regexp, kws, fn))
diff_q(&outq, p);
else
diff_free_filepair(p);
}
-
- if (opts & DIFF_PICKAXE_REGEX) {
- regfree(®ex);
}
free(q->queue);
*q = outq;
+}
+
+void diffcore_pickaxe(struct diff_options *o)
+{
+ const char *needle = o->pickaxe;
+ int opts = o->pickaxe_opts;
+ regex_t regex, *regexp = NULL;
+ kwset_t kws = NULL;
+
+ if (opts & (DIFF_PICKAXE_REGEX | DIFF_PICKAXE_KIND_G)) {
+ int err;
+ int cflags = REG_EXTENDED | REG_NEWLINE;
+ if (DIFF_OPT_TST(o, PICKAXE_IGNORE_CASE))
+ cflags |= REG_ICASE;
+ err = regcomp(®ex, needle, cflags);
+ if (err) {
+ /* The POSIX.2 people are surely sick */
+ char errbuf[1024];
+ regerror(err, ®ex, errbuf, 1024);
+ regfree(®ex);
+ die("invalid regex: %s", errbuf);
+ }
+ regexp = ®ex;
+ } else {
+ kws = kwsalloc(DIFF_OPT_TST(o, PICKAXE_IGNORE_CASE)
+ ? tolower_trans_tbl : NULL);
+ kwsincr(kws, needle, strlen(needle));
+ kwsprep(kws);
+ }
+
+ /* Might want to warn when both S and G are on; I don't care... */
+ pickaxe(&diff_queued_diff, o, regexp, kws,
+ (opts & DIFF_PICKAXE_KIND_G) ? diff_grep : has_changes);
+
+ if (regexp)
+ regfree(regexp);
+ else
+ kwsfree(kws);
return;
}