-#include "object.h"
#include "cache.h"
-#include <stdlib.h>
-#include <string.h>
+#include "object.h"
+#include "blob.h"
+#include "tree.h"
+#include "commit.h"
+#include "tag.h"
struct object **objs;
-int nr_objs;
-static int obj_allocs;
+static int nr_objs;
+int obj_allocs;
+
+const char *type_names[] = {
+ "none", "blob", "tree", "commit", "bad"
+};
-static int find_object(unsigned char *sha1)
+static int hashtable_index(const unsigned char *sha1)
{
- int first = 0, last = nr_objs;
-
- while (first < last) {
- int next = (first + last) / 2;
- struct object *obj = objs[next];
- int cmp;
-
- cmp = memcmp(sha1, obj->sha1, 20);
- if (!cmp)
- return next;
- if (cmp < 0) {
- last = next;
- continue;
- }
- first = next+1;
- }
- return -first-1;
+ unsigned int i;
+ memcpy(&i, sha1, sizeof(unsigned int));
+ return (int)(i % obj_allocs);
+}
+
+static int find_object(const unsigned char *sha1)
+{
+ int i;
+
+ if (!objs)
+ return -1;
+
+ i = hashtable_index(sha1);
+ while (objs[i]) {
+ if (memcmp(sha1, objs[i]->sha1, 20) == 0)
+ return i;
+ i++;
+ if (i == obj_allocs)
+ i = 0;
+ }
+ return -1 - i;
}
-struct object *lookup_object(unsigned char *sha1)
+struct object *lookup_object(const unsigned char *sha1)
{
int pos = find_object(sha1);
if (pos >= 0)
return NULL;
}
-void created_object(unsigned char *sha1, struct object *obj)
+void created_object(const unsigned char *sha1, struct object *obj)
{
- int pos = find_object(sha1);
+ int pos;
obj->parsed = 0;
memcpy(obj->sha1, sha1, 20);
- obj->type = NULL;
- obj->refs = NULL;
+ obj->type = TYPE_NONE;
obj->used = 0;
+ if (obj_allocs - 1 <= nr_objs * 2) {
+ int i, count = obj_allocs;
+ obj_allocs = (obj_allocs < 32 ? 32 : 2 * obj_allocs);
+ objs = xrealloc(objs, obj_allocs * sizeof(struct object *));
+ memset(objs + count, 0, (obj_allocs - count)
+ * sizeof(struct object *));
+ for (i = 0; i < obj_allocs; i++)
+ if (objs[i]) {
+ int j = find_object(objs[i]->sha1);
+ if (j != i) {
+ j = -1 - j;
+ objs[j] = objs[i];
+ objs[i] = NULL;
+ }
+ }
+ }
+
+ pos = find_object(sha1);
if (pos >= 0)
die("Inserting %s twice\n", sha1_to_hex(sha1));
pos = -pos-1;
- if (obj_allocs == nr_objs) {
- obj_allocs = alloc_nr(obj_allocs);
- objs = realloc(objs, obj_allocs * sizeof(struct object *));
+ objs[pos] = obj;
+ nr_objs++;
+}
+
+struct object *lookup_object_type(const unsigned char *sha1, const char *type)
+{
+ if (!type) {
+ return lookup_unknown_object(sha1);
+ } else if (!strcmp(type, blob_type)) {
+ return &lookup_blob(sha1)->object;
+ } else if (!strcmp(type, tree_type)) {
+ return &lookup_tree(sha1)->object;
+ } else if (!strcmp(type, commit_type)) {
+ return &lookup_commit(sha1)->object;
+ } else if (!strcmp(type, tag_type)) {
+ return &lookup_tag(sha1)->object;
+ } else {
+ error("Unknown type %s", type);
+ return NULL;
}
+}
- /* Insert it into the right place */
- memmove(objs + pos + 1, objs + pos, (nr_objs - pos) *
- sizeof(struct object *));
+union any_object {
+ struct object object;
+ struct commit commit;
+ struct tree tree;
+ struct blob blob;
+ struct tag tag;
+};
- objs[pos] = obj;
- nr_objs++;
+struct object *lookup_unknown_object(const unsigned char *sha1)
+{
+ struct object *obj = lookup_object(sha1);
+ if (!obj) {
+ union any_object *ret = xcalloc(1, sizeof(*ret));
+ created_object(sha1, &ret->object);
+ ret->object.type = TYPE_NONE;
+ return &ret->object;
+ }
+ return obj;
+}
+
+struct object *parse_object(const unsigned char *sha1)
+{
+ unsigned long size;
+ char type[20];
+ void *buffer = read_sha1_file(sha1, type, &size);
+ if (buffer) {
+ struct object *obj;
+ if (check_sha1_signature(sha1, buffer, size, type) < 0)
+ printf("sha1 mismatch %s\n", sha1_to_hex(sha1));
+ if (!strcmp(type, blob_type)) {
+ struct blob *blob = lookup_blob(sha1);
+ parse_blob_buffer(blob, buffer, size);
+ obj = &blob->object;
+ } else if (!strcmp(type, tree_type)) {
+ struct tree *tree = lookup_tree(sha1);
+ obj = &tree->object;
+ if (!tree->object.parsed) {
+ parse_tree_buffer(tree, buffer, size);
+ buffer = NULL;
+ }
+ } else if (!strcmp(type, commit_type)) {
+ struct commit *commit = lookup_commit(sha1);
+ parse_commit_buffer(commit, buffer, size);
+ if (!commit->buffer) {
+ commit->buffer = buffer;
+ buffer = NULL;
+ }
+ obj = &commit->object;
+ } else if (!strcmp(type, tag_type)) {
+ struct tag *tag = lookup_tag(sha1);
+ parse_tag_buffer(tag, buffer, size);
+ obj = &tag->object;
+ } else {
+ obj = NULL;
+ }
+ free(buffer);
+ return obj;
+ }
+ return NULL;
+}
+
+struct object_list *object_list_insert(struct object *item,
+ struct object_list **list_p)
+{
+ struct object_list *new_list = xmalloc(sizeof(struct object_list));
+ new_list->item = item;
+ new_list->next = *list_p;
+ *list_p = new_list;
+ return new_list;
}
-void add_ref(struct object *refer, struct object *target)
+void object_list_append(struct object *item,
+ struct object_list **list_p)
{
- struct object_list **pp = &refer->refs;
- struct object_list *p;
-
- while ((p = *pp) != NULL) {
- if (p->item == target)
- return;
- pp = &p->next;
+ while (*list_p) {
+ list_p = &((*list_p)->next);
}
+ *list_p = xmalloc(sizeof(struct object_list));
+ (*list_p)->next = NULL;
+ (*list_p)->item = item;
+}
- target->used = 1;
- p = malloc(sizeof(*p));
- p->item = target;
- p->next = NULL;
- *pp = p;
+unsigned object_list_length(struct object_list *list)
+{
+ unsigned ret = 0;
+ while (list) {
+ list = list->next;
+ ret++;
+ }
+ return ret;
}
-void mark_reachable(struct object *obj, unsigned int mask)
+int object_list_contains(struct object_list *list, struct object *obj)
{
- struct object_list *p = obj->refs;
-
- /* If we've been here already, don't bother */
- if (obj->flags & mask)
- return;
- obj->flags |= mask;
- while (p) {
- mark_reachable(p->item, mask);
- p = p->next;
+ while (list) {
+ if (list->item == obj)
+ return 1;
+ list = list->next;
}
+ return 0;
}