/*
* Copyright (C) 2005 Junio C Hamano
+ * Copyright (C) 2010 Google Inc.
*/
#include "cache.h"
#include "diff.h"
#include "diffcore.h"
-#include "delta.h"
+#include "xdiff-interface.h"
-static int contains(struct diff_filespec *one,
- const char *needle, unsigned long len)
+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)
{
- unsigned long offset, sz;
+ 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,
+ regex_t *regexp)
+{
+ unsigned int cnt;
+ unsigned long sz;
const char *data;
- if (diff_populate_filespec(one))
+ if (diff_populate_filespec(one, 0))
+ return 0;
+ if (!len)
return 0;
+
sz = one->size;
data = one->data;
- for (offset = 0; offset + len <= sz; offset++)
- if (!strncmp(needle, data + offset, len))
- return 1;
- return 0;
+ cnt = 0;
+
+ if (regexp) {
+ regmatch_t regmatch;
+ int flags = 0;
+
+ assert(data[sz] == '\0');
+ while (*data && !regexec(regexp, data, 1, ®match, flags)) {
+ flags |= REG_NOTBOL;
+ data += regmatch.rm_eo;
+ if (*data && regmatch.rm_so == regmatch.rm_eo)
+ data++;
+ cnt++;
+ }
+
+ } else { /* Classic exact string match */
+ while (sz) {
+ const char *found = memmem(data, sz, needle, len);
+ if (!found)
+ break;
+ sz -= found - data + len;
+ data = found + len;
+ cnt++;
+ }
+ }
+ diff_free_filespec_data(one);
+ return cnt;
}
-void diffcore_pickaxe(const char *needle)
+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;
+ int i, has_changes;
+ regex_t regex, *regexp = NULL;
struct diff_queue_struct outq;
- outq.queue = NULL;
- outq.nr = outq.alloc = 0;
+ DIFF_QUEUE_CLEAR(&outq);
- for (i = 0; i < q->nr; i++) {
- struct diff_filepair *p = q->queue[i];
- int onum = outq.nr;
- if (!DIFF_FILE_VALID(p->one)) {
- if (!DIFF_FILE_VALID(p->two))
- continue; /* ignore nonsense */
- /* created */
- if (contains(p->two, needle, len))
- diff_q(&outq, p);
+ 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);
}
- else if (!DIFF_FILE_VALID(p->two)) {
- if (contains(p->one, needle, len))
- diff_q(&outq, p);
+ regexp = ®ex;
+ }
+
+ if (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_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++;
}
- else if (contains(p->one, needle, len) !=
- contains(p->two, needle, len))
- diff_q(&outq, p);
- if (onum == outq.nr)
- free(p);
+ 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.
+ */
+ 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];
+ 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)
+ diff_q(&outq, p);
+ else
+ diff_free_filepair(p);
+ }
+
+ 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);
+}