static unsigned char null_sha1[20] = { 0, };
static int reverse_diff;
+static int use_size_cache;
static const char *external_diff(void)
{
diff_arg, input_name_sq[0], input_name_sq[1]);
printf("diff --git a/%s b/%s\n", name_a, name_b);
- if (!path1[0][0])
+ if (!path1[0][0]) {
printf("new file mode %s\n", temp[1].mode);
- else if (!path1[1][0])
+ if (xfrm_msg && xfrm_msg[0])
+ puts(xfrm_msg);
+ }
+ else if (!path1[1][0]) {
printf("deleted file mode %s\n", temp[0].mode);
+ if (xfrm_msg && xfrm_msg[0])
+ puts(xfrm_msg);
+ }
else {
if (strcmp(temp[0].mode, temp[1].mode)) {
printf("old mode %s\n", temp[0].mode);
return 1;
}
+static struct sha1_size_cache {
+ unsigned char sha1[20];
+ unsigned long size;
+} **sha1_size_cache;
+static int sha1_size_cache_nr, sha1_size_cache_alloc;
+
+static struct sha1_size_cache *locate_size_cache(unsigned char *sha1,
+ int find_only,
+ unsigned long size)
+{
+ int first, last;
+ struct sha1_size_cache *e;
+
+ first = 0;
+ last = sha1_size_cache_nr;
+ while (last > first) {
+ int cmp, next = (last + first) >> 1;
+ e = sha1_size_cache[next];
+ cmp = memcmp(e->sha1, sha1, 20);
+ if (!cmp)
+ return e;
+ if (cmp < 0) {
+ last = next;
+ continue;
+ }
+ first = next+1;
+ }
+ /* not found */
+ if (find_only)
+ return NULL;
+ /* insert to make it at "first" */
+ if (sha1_size_cache_alloc <= sha1_size_cache_nr) {
+ sha1_size_cache_alloc = alloc_nr(sha1_size_cache_alloc);
+ sha1_size_cache = xrealloc(sha1_size_cache,
+ sha1_size_cache_alloc *
+ sizeof(*sha1_size_cache));
+ }
+ sha1_size_cache_nr++;
+ if (first < sha1_size_cache_nr)
+ memmove(sha1_size_cache + first + 1, sha1_size_cache + first,
+ (sha1_size_cache_nr - first - 1) *
+ sizeof(*sha1_size_cache));
+ e = xmalloc(sizeof(struct sha1_size_cache));
+ sha1_size_cache[first] = e;
+ memcpy(e->sha1, sha1, 20);
+ e->size = size;
+ return e;
+}
+
/*
* While doing rename detection and pickaxe operation, we may need to
* grab the data for the blob (or file) for our own in-core comparison.
* diff_filespec has data and size fields for this purpose.
*/
-int diff_populate_filespec(struct diff_filespec *s)
+int diff_populate_filespec(struct diff_filespec *s, int size_only)
{
int err = 0;
if (!DIFF_FILE_VALID(s))
if (S_ISDIR(s->mode))
return -1;
+ if (!use_size_cache)
+ size_only = 0;
+
if (s->data)
return err;
if (!s->sha1_valid ||
s->size = st.st_size;
if (!s->size)
goto empty;
+ if (size_only)
+ return 0;
if (S_ISLNK(st.st_mode)) {
int ret;
s->data = xmalloc(s->size);
}
else {
char type[20];
- s->data = read_sha1_file(s->sha1, type, &s->size);
- s->should_free = 1;
+ struct sha1_size_cache *e;
+
+ if (size_only) {
+ e = locate_size_cache(s->sha1, 1, 0);
+ if (e) {
+ s->size = e->size;
+ return 0;
+ }
+ if (!sha1_file_size(s->sha1, &s->size))
+ locate_size_cache(s->sha1, 0, s->size);
+ }
+ else {
+ s->data = read_sha1_file(s->sha1, type, &s->size);
+ s->should_free = 1;
+ }
}
return 0;
}
strcpy(temp->hex, sha1_to_hex(null_sha1));
else
strcpy(temp->hex, sha1_to_hex(one->sha1));
- sprintf(temp->mode, "%06o",
- S_IFREG |ce_permissions(st.st_mode));
+ /* Even though we may sometimes borrow the
+ * contents from the work tree, we always want
+ * one->mode. mode is trustworthy even when
+ * !(one->sha1_valid), as long as
+ * DIFF_FILE_VALID(one).
+ */
+ sprintf(temp->mode, "%06o", one->mode);
}
return;
}
else {
- if (diff_populate_filespec(one))
+ if (diff_populate_filespec(one, 0))
die("cannot read data blob for %s", one->path);
prep_temp_blob(temp, one->data, one->size,
one->sha1, one->mode);
{
const char *pgm = external_diff();
if (!pgm &&
+ one && two &&
DIFF_FILE_VALID(one) && DIFF_FILE_VALID(two) &&
(S_IFMT & one->mode) != (S_IFMT & two->mode)) {
/* a filepair that changes between file and symlink
{
if (flags & DIFF_SETUP_REVERSE)
reverse_diff = 1;
+ if (flags & DIFF_SETUP_USE_CACHE) {
+ if (!active_cache)
+ /* read-cache does not die even when it fails
+ * so it is safe for us to do this here. Also
+ * it does not smudge active_cache or active_nr
+ * when it fails, so we do not have to worry about
+ * cleaning it up oufselves either.
+ */
+ read_cache();
+ }
+ if (flags & DIFF_SETUP_USE_SIZE_CACHE)
+ use_size_cache = 1;
+
+}
+
+static int parse_num(const char **cp_p)
+{
+ int num, scale, ch, cnt;
+ const char *cp = *cp_p;
+
+ cnt = num = 0;
+ scale = 1;
+ while ('0' <= (ch = *cp) && ch <= '9') {
+ if (cnt++ < 5) {
+ /* We simply ignore more than 5 digits precision. */
+ scale *= 10;
+ num = num * 10 + ch - '0';
+ }
+ *cp++;
+ }
+ *cp_p = cp;
+
+ /* user says num divided by scale and we say internally that
+ * is MAX_SCORE * num / scale.
+ */
+ return (MAX_SCORE * num / scale);
+}
+
+int diff_scoreopt_parse(const char *opt)
+{
+ int opt1, opt2, cmd;
+
+ if (*opt++ != '-')
+ return -1;
+ cmd = *opt++;
+ if (cmd != 'M' && cmd != 'C' && cmd != 'B')
+ return -1; /* that is not a -M, -C nor -B option */
+
+ opt1 = parse_num(&opt);
+ if (cmd != 'B')
+ opt2 = 0;
+ else {
+ if (*opt == 0)
+ opt2 = 0;
+ else if (*opt != '/')
+ return -1; /* we expect -B80/99 or -B80 */
+ else {
+ opt++;
+ opt2 = parse_num(&opt);
+ }
+ }
+ if (*opt != 0)
+ return -1;
+ return opt1 | (opt2 << 16);
}
struct diff_queue_struct diff_queued_diff;
dp->one = one;
dp->two = two;
dp->score = 0;
+ dp->status = 0;
dp->source_stays = 0;
+ dp->broken_pair = 0;
diff_q(queue, dp);
return dp;
}
sprintf(status, "%c%03d", p->status,
(int)(0.5 + p->score * 100.0/MAX_SCORE));
break;
+ case 'N': case 'D':
+ two_paths = 0;
+ if (p->score)
+ sprintf(status, "%c%03d", p->status,
+ (int)(0.5 + p->score * 100.0/MAX_SCORE));
+ else {
+ status[0] = p->status;
+ status[1] = 0;
+ }
+ break;
default:
two_paths = 0;
status[0] = p->status;
case 'R':
sprintf(msg_,
"similarity index %d%%\n"
- "rename old %s\n"
- "rename new %s",
+ "rename from %s\n"
+ "rename to %s",
(int)(0.5 + p->score * 100.0/MAX_SCORE),
p->one->path, p->two->path);
msg = msg_;
break;
+ case 'D': case 'N':
+ if (DIFF_PAIR_BROKEN(p)) {
+ sprintf(msg_,
+ "dissimilarity index %d%%",
+ (int)(0.5 + p->score * 100.0/MAX_SCORE));
+ msg = msg_;
+ }
+ else
+ msg = NULL;
+ break;
default:
msg = NULL;
}
{
diff_debug_filespec(p->one, i, "one");
diff_debug_filespec(p->two, i, "two");
- fprintf(stderr, "score %d, status %c source_stays %d\n",
- p->score, p->status ? : '?', p->source_stays);
+ fprintf(stderr, "score %d, status %c stays %d broken %d\n",
+ p->score, p->status ? : '?',
+ p->source_stays, p->broken_pair);
}
void diff_debug_queue(const char *msg, struct diff_queue_struct *q)
p->status = 'U';
else if (!DIFF_FILE_VALID(p->one))
p->status = 'N';
- else if (!DIFF_FILE_VALID(p->two)) {
- /* Deleted entry may have been picked up by
- * another rename-copy entry. So we scan the
- * queue and if we find one that uses us as the
- * source we do not say delete for this entry.
- */
- for (j = 0; j < q->nr; j++) {
- pp = q->queue[j];
- if (!strcmp(p->one->path, pp->one->path) &&
- pp->score) {
- /* rename/copy are always valid
- * so we do not say DIFF_FILE_VALID()
- * on pp->one and pp->two.
- */
- p->status = 'X';
- break;
- }
- }
- if (!p->status)
- p->status = 'D';
- }
+ else if (!DIFF_FILE_VALID(p->two))
+ p->status = 'D';
else if (DIFF_PAIR_TYPE_CHANGED(p))
p->status = 'T';
* whose both sides are valid and of the same type, i.e.
* either in-place edit or rename/copy edit.
*/
- else if (p->score) {
+ else if (DIFF_PAIR_RENAME(p)) {
if (p->source_stays) {
p->status = 'C';
continue;
pp = q->queue[j];
if (strcmp(pp->one->path, p->one->path))
continue; /* not us */
- if (!pp->score)
+ if (!DIFF_PAIR_RENAME(pp))
continue; /* not a rename/copy */
/* pp is a rename/copy from the same source */
p->status = 'C';
else if (memcmp(p->one->sha1, p->two->sha1, 20) ||
p->one->mode != p->two->mode)
p->status = 'M';
- else
- /* this is a "no-change" entry.
- * should not happen anymore.
- * p->status = 'X';
+ else {
+ /* This is a "no-change" entry and should not
+ * happen anymore, but prepare for broken callers.
*/
- die("internal error in diffcore: unmodified entry remains");
+ error("feeding unmodified %s to diffcore",
+ p->one->path);
+ p->status = 'X';
+ }
}
diff_debug_queue("resolve-rename-copy done", q);
}
-void diff_flush(int diff_output_style, int resolve_rename_copy)
+void diff_flush(int diff_output_style)
{
struct diff_queue_struct *q = &diff_queued_diff;
int i;
if (diff_output_style == DIFF_FORMAT_MACHINE)
line_termination = inter_name_termination = 0;
- if (resolve_rename_copy)
- diff_resolve_rename_copy();
for (i = 0; i < q->nr; i++) {
struct diff_filepair *p = q->queue[i];
q->nr = q->alloc = 0;
}
+static void diffcore_apply_filter(const char *filter)
+{
+ int i;
+ struct diff_queue_struct *q = &diff_queued_diff;
+ struct diff_queue_struct outq;
+ outq.queue = NULL;
+ outq.nr = outq.alloc = 0;
+
+ if (!filter)
+ return;
+
+ if (strchr(filter, 'A')) {
+ /* All-or-none */
+ int found;
+ for (i = found = 0; !found && i < q->nr; i++) {
+ struct diff_filepair *p = q->queue[i];
+ if ((p->broken_pair && strchr(filter, 'B')) ||
+ (!p->broken_pair && strchr(filter, p->status)))
+ found++;
+ }
+ if (found)
+ return;
+
+ /* 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 {
+ /* Only the matching ones */
+ for (i = 0; i < q->nr; i++) {
+ struct diff_filepair *p = q->queue[i];
+ if ((p->broken_pair && strchr(filter, 'B')) ||
+ (!p->broken_pair && strchr(filter, p->status)))
+ diff_q(&outq, p);
+ else
+ diff_free_filepair(p);
+ }
+ }
+ free(q->queue);
+ *q = outq;
+}
+
+void diffcore_std(const char **paths,
+ int detect_rename, int rename_score,
+ const char *pickaxe, int pickaxe_opts,
+ int break_opt,
+ const char *orderfile,
+ const char *filter)
+{
+ if (paths && paths[0])
+ diffcore_pathspec(paths);
+ if (break_opt != -1)
+ diffcore_break(break_opt);
+ if (detect_rename)
+ diffcore_rename(detect_rename, rename_score);
+ if (break_opt != -1)
+ diffcore_merge_broken();
+ if (pickaxe)
+ diffcore_pickaxe(pickaxe, pickaxe_opts);
+ if (orderfile)
+ diffcore_order(orderfile);
+ diff_resolve_rename_copy();
+ diffcore_apply_filter(filter);
+}
+
+
+void diffcore_std_no_resolve(const char **paths,
+ const char *pickaxe, int pickaxe_opts,
+ const char *orderfile,
+ const char *filter)
+{
+ if (paths && paths[0])
+ diffcore_pathspec(paths);
+ if (pickaxe)
+ diffcore_pickaxe(pickaxe, pickaxe_opts);
+ if (orderfile)
+ diffcore_order(orderfile);
+ diffcore_apply_filter(filter);
+}
+
void diff_addremove(int addremove, unsigned mode,
const unsigned char *sha1,
const char *base, const char *path)