/*
* Copyright (C) 2005 Junio C Hamano
+ * Copyright (C) 2010 Google Inc.
*/
#include "cache.h"
#include "diff.h"
#include "diffcore.h"
+#include "xdiff-interface.h"
+
+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 void fill_one(struct diff_filespec *one,
+ mmfile_t *mf, struct userdiff_driver **textconv)
+{
+ if (DIFF_FILE_VALID(one)) {
+ *textconv = get_textconv(one);
+ mf->size = fill_textconv(*textconv, one, &mf->ptr);
+ } else {
+ memset(mf, 0, sizeof(*mf));
+ }
+}
+
+static int diff_grep(struct diff_filepair *p, regex_t *regexp, struct diff_options *o)
+{
+ regmatch_t regmatch;
+ struct userdiff_driver *textconv_one = NULL;
+ struct userdiff_driver *textconv_two = NULL;
+ mmfile_t mf1, mf2;
+ int hit;
+
+ if (diff_unmodified_pair(p))
+ return 0;
+
+ fill_one(p->one, &mf1, &textconv_one);
+ fill_one(p->two, &mf2, &textconv_two);
+
+ if (!mf1.ptr) {
+ if (!mf2.ptr)
+ return 0; /* ignore unmerged */
+ /* created "two" -- does it have what we are looking for? */
+ hit = !regexec(regexp, p->two->data, 1, ®match, 0);
+ } else if (!mf2.ptr) {
+ /* removed "one" -- did it have what we are looking for? */
+ hit = !regexec(regexp, p->one->data, 1, ®match, 0);
+ } else {
+ /*
+ * We have both sides; need to run textual diff and see if
+ * the pattern appears on added/deleted lines.
+ */
+ struct diffgrep_cb ecbdata;
+ xpparam_t xpp;
+ xdemitconf_t xecfg;
+
+ 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(&mf1, &mf2, diffgrep_consume, &ecbdata,
+ &xpp, &xecfg);
+ hit = ecbdata.hit;
+ }
+ if (textconv_one)
+ free(mf1.ptr);
+ if (textconv_two)
+ free(mf2.ptr);
+ return hit;
+}
+
+static void diffcore_pickaxe_grep(struct diff_options *o)
+{
+ struct diff_queue_struct *q = &diff_queued_diff;
+ int i, has_changes, err;
+ regex_t regex;
+ struct diff_queue_struct outq;
+ outq.queue = NULL;
+ outq.nr = outq.alloc = 0;
+
+ err = regcomp(®ex, o->pickaxe, REG_EXTENDED | REG_NEWLINE);
+ if (err) {
+ char errbuf[1024];
+ regerror(err, ®ex, errbuf, 1024);
+ regfree(®ex);
+ die("invalid log-grep regex: %s", errbuf);
+ }
+
+ 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++) {
+ struct diff_filepair *p = q->queue[i];
+ if (diff_grep(p, ®ex, o))
+ has_changes++;
+ }
+ if (has_changes)
+ return; /* do 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.
+ */
+ for (i = 0; i < q->nr; i++)
+ diff_free_filepair(q->queue[i]);
+ } else {
+ /* Showing only the filepairs that has the needle */
+ for (i = 0; i < q->nr; i++) {
+ struct diff_filepair *p = q->queue[i];
+ if (diff_grep(p, ®ex, o))
+ diff_q(&outq, p);
+ else
+ diff_free_filepair(p);
+ }
+ }
+
+ regfree(®ex);
+
+ free(q->queue);
+ *q = outq;
+ return;
+}
static unsigned int contains(struct diff_filespec *one,
const char *needle, unsigned long len,
return cnt;
}
-void diffcore_pickaxe(const char *needle, int opts)
+static void diffcore_pickaxe_count(struct diff_options *o)
{
+ const char *needle = o->pickaxe;
+ int opts = o->pickaxe_opts;
struct diff_queue_struct *q = &diff_queued_diff;
unsigned long len = strlen(needle);
int i, has_changes;
diff_free_filepair(p);
}
- if (opts & DIFF_PICKAXE_REGEX) {
+ if (opts & DIFF_PICKAXE_REGEX)
regfree(®ex);
- }
free(q->queue);
*q = outq;
return;
}
+
+void diffcore_pickaxe(struct diff_options *o)
+{
+ /* Might want to warn when both S and G are on; I don't care... */
+ if (o->pickaxe_opts & DIFF_PICKAXE_KIND_G)
+ diffcore_pickaxe_grep(o);
+ else
+ diffcore_pickaxe_count(o);
+}