{
struct object *obj = lookup_object(sha1);
if (!obj) {
- struct commit *ret = xmalloc(sizeof(struct commit));
- memset(ret, 0, sizeof(struct commit));
+ struct commit *ret = xcalloc(1, sizeof(struct commit));
created_object(sha1, &ret->object);
ret->object.type = commit_type;
return ret;
return date;
}
-static struct commit_graft {
- unsigned char sha1[20];
- int nr_parent;
- unsigned char parent[0][20]; /* more */
-} **commit_graft;
+static struct commit_graft **commit_graft;
static int commit_graft_alloc, commit_graft_nr;
static int commit_graft_pos(const unsigned char *sha1)
return -lo - 1;
}
-static void prepare_commit_graft(void)
+int register_commit_graft(struct commit_graft *graft, int ignore_dups)
+{
+ int pos = commit_graft_pos(graft->sha1);
+
+ if (0 <= pos) {
+ if (ignore_dups)
+ free(graft);
+ else {
+ free(commit_graft[pos]);
+ commit_graft[pos] = graft;
+ }
+ return 1;
+ }
+ pos = -pos - 1;
+ if (commit_graft_alloc <= ++commit_graft_nr) {
+ commit_graft_alloc = alloc_nr(commit_graft_alloc);
+ commit_graft = xrealloc(commit_graft,
+ sizeof(*commit_graft) *
+ commit_graft_alloc);
+ }
+ if (pos < commit_graft_nr)
+ memmove(commit_graft + pos + 1,
+ commit_graft + pos,
+ (commit_graft_nr - pos - 1) *
+ sizeof(*commit_graft));
+ commit_graft[pos] = graft;
+ return 0;
+}
+
+struct commit_graft *read_graft_line(char *buf, int len)
+{
+ /* The format is just "Commit Parent1 Parent2 ...\n" */
+ int i;
+ struct commit_graft *graft = NULL;
+
+ if (buf[len-1] == '\n')
+ buf[--len] = 0;
+ if (buf[0] == '#' || buf[0] == '\0')
+ return NULL;
+ if ((len + 1) % 41) {
+ bad_graft_data:
+ error("bad graft data: %s", buf);
+ free(graft);
+ return NULL;
+ }
+ i = (len + 1) / 41 - 1;
+ graft = xmalloc(sizeof(*graft) + 20 * i);
+ graft->nr_parent = i;
+ if (get_sha1_hex(buf, graft->sha1))
+ goto bad_graft_data;
+ for (i = 40; i < len; i += 41) {
+ if (buf[i] != ' ')
+ goto bad_graft_data;
+ if (get_sha1_hex(buf + i + 1, graft->parent[i/41]))
+ goto bad_graft_data;
+ }
+ return graft;
+}
+
+int read_graft_file(const char *graft_file)
{
- char *graft_file = get_graft_file();
FILE *fp = fopen(graft_file, "r");
char buf[1024];
- if (!fp) {
- commit_graft = (struct commit_graft **) "hack";
- return;
- }
+ if (!fp)
+ return -1;
while (fgets(buf, sizeof(buf), fp)) {
/* The format is just "Commit Parent1 Parent2 ...\n" */
int len = strlen(buf);
- int i;
- struct commit_graft *graft = NULL;
-
- if (buf[len-1] == '\n')
- buf[--len] = 0;
- if (buf[0] == '#')
- continue;
- if ((len + 1) % 41) {
- bad_graft_data:
- error("bad graft data: %s", buf);
- free(graft);
+ struct commit_graft *graft = read_graft_line(buf, len);
+ if (!graft)
continue;
- }
- i = (len + 1) / 41 - 1;
- graft = xmalloc(sizeof(*graft) + 20 * i);
- graft->nr_parent = i;
- if (get_sha1_hex(buf, graft->sha1))
- goto bad_graft_data;
- for (i = 40; i < len; i += 41) {
- if (buf[i] != ' ')
- goto bad_graft_data;
- if (get_sha1_hex(buf + i + 1, graft->parent[i/41]))
- goto bad_graft_data;
- }
- i = commit_graft_pos(graft->sha1);
- if (0 <= i) {
+ if (register_commit_graft(graft, 1))
error("duplicate graft data: %s", buf);
- free(graft);
- continue;
- }
- i = -i - 1;
- if (commit_graft_alloc <= ++commit_graft_nr) {
- commit_graft_alloc = alloc_nr(commit_graft_alloc);
- commit_graft = xrealloc(commit_graft,
- sizeof(*commit_graft) *
- commit_graft_alloc);
- }
- if (i < commit_graft_nr)
- memmove(commit_graft + i + 1,
- commit_graft + i,
- (commit_graft_nr - i - 1) *
- sizeof(*commit_graft));
- commit_graft[i] = graft;
}
fclose(fp);
+ return 0;
+}
+
+static void prepare_commit_graft(void)
+{
+ static int commit_graft_prepared;
+ char *graft_file;
+
+ if (commit_graft_prepared)
+ return;
+ graft_file = get_graft_file();
+ read_graft_file(graft_file);
+ commit_graft_prepared = 1;
}
static struct commit_graft *lookup_commit_graft(const unsigned char *sha1)
{
int pos;
- if (!commit_graft)
- prepare_commit_graft();
+ prepare_commit_graft();
pos = commit_graft_pos(sha1);
if (pos < 0)
return NULL;
while (len--) {
char c = *msg++;
+ if (!c)
+ break;
ret++;
if (c == '\n')
break;
- if (!c)
- return 0;
}
return ret;
}
if (fmt == CMIT_FMT_ONELINE)
break;
}
- if (fmt == CMIT_FMT_ONELINE) {
- /* We do not want the terminating newline */
- if (buf[offset - 1] == '\n')
- offset--;
- }
- else {
- /* Make sure there is an EOLN */
- if (buf[offset - 1] != '\n')
- buf[offset++] = '\n';
- }
+ while (offset && isspace(buf[offset-1]))
+ offset--;
+ /* Make sure there is an EOLN for the non-oneline case */
+ if (fmt != CMIT_FMT_ONELINE)
+ buf[offset++] = '\n';
buf[offset] = '\0';
return offset;
}
return count;
}
+void topo_sort_default_setter(struct commit *c, void *data)
+{
+ c->object.util = data;
+}
+
+void *topo_sort_default_getter(struct commit *c)
+{
+ return c->object.util;
+}
+
/*
* Performs an in-place topological sort on the list supplied.
*/
-void sort_in_topological_order(struct commit_list ** list)
+void sort_in_topological_order(struct commit_list ** list, int lifo)
+{
+ sort_in_topological_order_fn(list, lifo, topo_sort_default_setter,
+ topo_sort_default_getter);
+}
+
+void sort_in_topological_order_fn(struct commit_list ** list, int lifo,
+ topo_sort_set_fn_t setter,
+ topo_sort_get_fn_t getter)
{
struct commit_list * next = *list;
struct commit_list * work = NULL, **insert;
next=*list;
while (next) {
next_nodes->list_item = next;
- next->item->object.util = next_nodes;
+ setter(next->item, next_nodes);
next_nodes++;
next = next->next;
}
struct commit_list * parents = next->item->parents;
while (parents) {
struct commit * parent=parents->item;
- struct sort_node * pn = (struct sort_node *)parent->object.util;
-
+ struct sort_node * pn = (struct sort_node *) getter(parent);
+
if (pn)
pn->indegree++;
parents=parents->next;
next=*list;
insert = &work;
while (next) {
- struct sort_node * node = (struct sort_node *)next->item->object.util;
+ struct sort_node * node = (struct sort_node *) getter(next->item);
if (node->indegree == 0) {
insert = &commit_list_insert(next->item, insert)->next;
}
next=next->next;
}
+
/* process the list in topological order */
+ if (!lifo)
+ sort_by_date(&work);
while (work) {
struct commit * work_item = pop_commit(&work);
- struct sort_node * work_node = (struct sort_node *)work_item->object.util;
+ struct sort_node * work_node = (struct sort_node *) getter(work_item);
struct commit_list * parents = work_item->parents;
while (parents) {
struct commit * parent=parents->item;
- struct sort_node * pn = (struct sort_node *)parent->object.util;
-
+ struct sort_node * pn = (struct sort_node *) getter(parent);
+
if (pn) {
- /*
+ /*
* parents are only enqueued for emission
* when all their children have been emitted thereby
* guaranteeing topological order.
*/
pn->indegree--;
- if (!pn->indegree)
- commit_list_insert(parent, &work);
+ if (!pn->indegree) {
+ if (!lifo)
+ insert_by_date(parent, &work);
+ else
+ commit_list_insert(parent, &work);
+ }
}
parents=parents->next;
}
*pptr = work_node->list_item;
pptr = &(*pptr)->next;
*pptr = NULL;
- work_item->object.util = NULL;
+ setter(work_item, NULL);
}
free(nodes);
}