static struct combine_diff_path *intersect_paths(struct combine_diff_path *curr, int n, int num_parent)
{
struct diff_queue_struct *q = &diff_queued_diff;
- struct combine_diff_path *p;
- int i;
+ struct combine_diff_path *p, **tail = &curr;
+ int i, cmp;
if (!n) {
- struct combine_diff_path *list = NULL, **tail = &list;
for (i = 0; i < q->nr; i++) {
int len;
const char *path;
p->path = (char *) &(p->parent[num_parent]);
memcpy(p->path, path, len);
p->path[len] = 0;
- p->len = len;
p->next = NULL;
memset(p->parent, 0,
sizeof(p->parent[0]) * num_parent);
*tail = p;
tail = &p->next;
}
- return list;
+ return curr;
}
- for (p = curr; p; p = p->next) {
- int found = 0;
- if (!p->len)
+ /*
+ * paths in curr (linked list) and q->queue[] (array) are
+ * both sorted in the tree order.
+ */
+ i = 0;
+ while ((p = *tail) != NULL) {
+ cmp = ((i >= q->nr)
+ ? -1 : strcmp(p->path, q->queue[i]->two->path));
+
+ if (cmp < 0) {
+ /* p->path not in q->queue[]; drop it */
+ *tail = p->next;
+ free(p);
continue;
- for (i = 0; i < q->nr; i++) {
- const char *path;
- int len;
+ }
- if (diff_unmodified_pair(q->queue[i]))
- continue;
- path = q->queue[i]->two->path;
- len = strlen(path);
- if (len == p->len && !memcmp(path, p->path, len)) {
- found = 1;
- hashcpy(p->parent[n].sha1, q->queue[i]->one->sha1);
- p->parent[n].mode = q->queue[i]->one->mode;
- p->parent[n].status = q->queue[i]->status;
- break;
- }
+ if (cmp > 0) {
+ /* q->queue[i] not in p->path; skip it */
+ i++;
+ continue;
}
- if (!found)
- p->len = 0;
+
+ hashcpy(p->parent[n].sha1, q->queue[i]->one->sha1);
+ p->parent[n].mode = q->queue[i]->one->mode;
+ p->parent[n].status = q->queue[i]->status;
+
+ tail = &p->next;
+ i++;
}
return curr;
}
{
struct diff_options *opt = &rev->diffopt;
- if (!p->len)
- return;
if (opt->output_format & (DIFF_FORMAT_RAW |
DIFF_FORMAT_NAME |
DIFF_FORMAT_NAME_STATUS))
q.queue = xcalloc(num_paths, sizeof(struct diff_filepair *));
q.alloc = num_paths;
q.nr = num_paths;
- for (i = 0, p = paths; p; p = p->next) {
- if (!p->len)
- continue;
+ for (i = 0, p = paths; p; p = p->next)
q.queue[i++] = combined_pair(p, num_parent);
- }
opt->format_callback(&q, opt, opt->format_callback_data);
for (i = 0; i < num_paths; i++)
free_combined_pair(q.queue[i]);
free(q.queue);
}
+static const char *path_path(void *obj)
+{
+ struct combine_diff_path *path = (struct combine_diff_path *)obj;
+
+ return path->path;
+}
+
+
+/* find set of paths that every parent touches */
+static struct combine_diff_path *find_paths_generic(const unsigned char *sha1,
+ const struct sha1_array *parents, struct diff_options *opt)
+{
+ struct combine_diff_path *paths = NULL;
+ int i, num_parent = parents->nr;
+
+ int output_format = opt->output_format;
+ const char *orderfile = opt->orderfile;
+
+ opt->output_format = DIFF_FORMAT_NO_OUTPUT;
+ /* tell diff_tree to emit paths in sorted (=tree) order */
+ opt->orderfile = NULL;
+
+ /* D(A,P1...Pn) = D(A,P1) ^ ... ^ D(A,Pn) (wrt paths) */
+ for (i = 0; i < num_parent; i++) {
+ /*
+ * show stat against the first parent even when doing
+ * combined diff.
+ */
+ int stat_opt = (output_format &
+ (DIFF_FORMAT_NUMSTAT|DIFF_FORMAT_DIFFSTAT));
+ if (i == 0 && stat_opt)
+ opt->output_format = stat_opt;
+ else
+ opt->output_format = DIFF_FORMAT_NO_OUTPUT;
+ diff_tree_sha1(parents->sha1[i], sha1, "", opt);
+ diffcore_std(opt);
+ paths = intersect_paths(paths, i, num_parent);
+
+ /* if showing diff, show it in requested order */
+ if (opt->output_format != DIFF_FORMAT_NO_OUTPUT &&
+ orderfile) {
+ diffcore_order(orderfile);
+ }
+
+ diff_flush(opt);
+ }
+
+ opt->output_format = output_format;
+ opt->orderfile = orderfile;
+ return paths;
+}
+
+
+/*
+ * find set of paths that everybody touches, assuming diff is run without
+ * rename/copy detection, etc, comparing all trees simultaneously (= faster).
+ */
+static struct combine_diff_path *find_paths_multitree(
+ const unsigned char *sha1, const struct sha1_array *parents,
+ struct diff_options *opt)
+{
+ int i, nparent = parents->nr;
+ const unsigned char **parents_sha1;
+ struct combine_diff_path paths_head;
+ struct strbuf base;
+
+ parents_sha1 = xmalloc(nparent * sizeof(parents_sha1[0]));
+ for (i = 0; i < nparent; i++)
+ parents_sha1[i] = parents->sha1[i];
+
+ /* fake list head, so worker can assume it is non-NULL */
+ paths_head.next = NULL;
+
+ strbuf_init(&base, PATH_MAX);
+ diff_tree_paths(&paths_head, sha1, parents_sha1, nparent, &base, opt);
+
+ strbuf_release(&base);
+ free(parents_sha1);
+ return paths_head.next;
+}
+
+
void diff_tree_combined(const unsigned char *sha1,
const struct sha1_array *parents,
int dense,
{
struct diff_options *opt = &rev->diffopt;
struct diff_options diffopts;
- struct combine_diff_path *p, *paths = NULL;
+ struct combine_diff_path *p, *paths;
int i, num_paths, needsep, show_log_first, num_parent = parents->nr;
- if (rev->verbose_header && opt->output_format)
+ int need_generic_pathscan;
+
+ /* nothing to do, if no parents */
+ if (!num_parent)
+ return;
+
+ show_log_first = !!rev->loginfo && !rev->no_commit_id;
+ needsep = 0;
+ if (show_log_first) {
+ show_log(rev);
+
++ if (rev->verbose_header && opt->output_format &&
++ opt->output_format != DIFF_FORMAT_NO_OUTPUT)
+ printf("%s%c", diff_line_prefix(opt),
+ opt->line_termination);
+ }
diffopts = *opt;
copy_pathspec(&diffopts.pathspec, &opt->pathspec);
- diffopts.output_format = DIFF_FORMAT_NO_OUTPUT;
DIFF_OPT_SET(&diffopts, RECURSIVE);
DIFF_OPT_CLR(&diffopts, ALLOW_EXTERNAL);
- show_log_first = !!rev->loginfo && !rev->no_commit_id;
- needsep = 0;
- /* find set of paths that everybody touches */
- for (i = 0; i < num_parent; i++) {
- /* show stat against the first parent even
+ /* find set of paths that everybody touches
+ *
+ * NOTE
+ *
+ * Diffcore transformations are bound to diff_filespec and logic
+ * comparing two entries - i.e. they do not apply directly to combine
+ * diff.
+ *
+ * If some of such transformations is requested - we launch generic
+ * path scanning, which works significantly slower compared to
+ * simultaneous all-trees-in-one-go scan in find_paths_multitree().
+ *
+ * TODO some of the filters could be ported to work on
+ * combine_diff_paths - i.e. all functionality that skips paths, so in
+ * theory, we could end up having only multitree path scanning.
+ *
+ * NOTE please keep this semantically in sync with diffcore_std()
+ */
+ need_generic_pathscan = opt->skip_stat_unmatch ||
+ DIFF_OPT_TST(opt, FOLLOW_RENAMES) ||
+ opt->break_opt != -1 ||
+ opt->detect_rename ||
+ opt->pickaxe ||
+ opt->filter;
+
+
+ if (need_generic_pathscan) {
+ /*
+ * NOTE generic case also handles --stat, as it computes
+ * diff(sha1,parent_i) for all i to do the job, specifically
+ * for parent0.
+ */
+ paths = find_paths_generic(sha1, parents, &diffopts);
+ }
+ else {
+ int stat_opt;
+ paths = find_paths_multitree(sha1, parents, &diffopts);
+
+ /*
+ * show stat against the first parent even
* when doing combined diff.
*/
- int stat_opt = (opt->output_format &
+ stat_opt = (opt->output_format &
(DIFF_FORMAT_NUMSTAT|DIFF_FORMAT_DIFFSTAT));
- if (i == 0 && stat_opt)
+ if (stat_opt) {
diffopts.output_format = stat_opt;
- else
- diffopts.output_format = DIFF_FORMAT_NO_OUTPUT;
- diff_tree_sha1(parents->sha1[i], sha1, "", &diffopts);
- diffcore_std(&diffopts);
- paths = intersect_paths(paths, i, num_parent);
-
- if (show_log_first && i == 0) {
- show_log(rev);
- if (rev->verbose_header && opt->output_format &&
- opt->output_format != DIFF_FORMAT_NO_OUTPUT)
- printf("%s%c", diff_line_prefix(opt),
- opt->line_termination);
+ diff_tree_sha1(parents->sha1[0], sha1, "", &diffopts);
+ diffcore_std(&diffopts);
+ if (opt->orderfile)
+ diffcore_order(opt->orderfile);
+ diff_flush(&diffopts);
}
- diff_flush(&diffopts);
}
- /* find out surviving paths */
- for (num_paths = 0, p = paths; p; p = p->next) {
- if (p->len)
- num_paths++;
+ /* find out number of surviving paths */
+ for (num_paths = 0, p = paths; p; p = p->next)
+ num_paths++;
+
+ /* order paths according to diffcore_order */
+ if (opt->orderfile && num_paths) {
+ struct obj_order *o;
+
+ o = xmalloc(sizeof(*o) * num_paths);
+ for (i = 0, p = paths; p; p = p->next, i++)
+ o[i].obj = p;
+ order_objects(opt->orderfile, path_path, o, num_paths);
+ for (i = 0; i < num_paths - 1; i++) {
+ p = o[i].obj;
+ p->next = o[i+1].obj;
+ }
+
+ p = o[num_paths-1].obj;
+ p->next = NULL;
+ paths = o[0].obj;
+ free(o);
}
+
+
if (num_paths) {
if (opt->output_format & (DIFF_FORMAT_RAW |
DIFF_FORMAT_NAME |
DIFF_FORMAT_NAME_STATUS)) {
- for (p = paths; p; p = p->next) {
- if (p->len)
- show_raw_diff(p, num_parent, rev);
- }
+ for (p = paths; p; p = p->next)
+ show_raw_diff(p, num_parent, rev);
needsep = 1;
}
else if (opt->output_format &
if (needsep)
printf("%s%c", diff_line_prefix(opt),
opt->line_termination);
- for (p = paths; p; p = p->next) {
- if (p->len)
- show_patch_diff(p, num_parent, dense,
- 0, rev);
- }
+ for (p = paths; p; p = p->next)
+ show_patch_diff(p, num_parent, dense,
+ 0, rev);
}
}