97 lines
1.9 KiB
C
97 lines
1.9 KiB
C
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#include "object.h"
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#include "cache.h"
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#include <stdlib.h>
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#include <string.h>
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struct object **objs;
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int nr_objs;
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static int obj_allocs;
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static int find_object(unsigned char *sha1)
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{
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int first = 0, last = nr_objs;
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while (first < last) {
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int next = (first + last) / 2;
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struct object *obj = objs[next];
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int cmp;
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cmp = memcmp(sha1, obj->sha1, 20);
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if (!cmp)
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return next;
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if (cmp < 0) {
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last = next;
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continue;
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}
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first = next+1;
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}
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return -first-1;
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}
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struct object *lookup_object(unsigned char *sha1)
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{
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int pos = find_object(sha1);
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if (pos >= 0)
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return objs[pos];
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return NULL;
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}
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void created_object(unsigned char *sha1, struct object *obj)
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{
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int pos = find_object(sha1);
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obj->parsed = 0;
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memcpy(obj->sha1, sha1, 20);
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obj->type = NULL;
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obj->refs = NULL;
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obj->used = 0;
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if (pos >= 0)
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die("Inserting %s twice\n", sha1_to_hex(sha1));
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pos = -pos-1;
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if (obj_allocs == nr_objs) {
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obj_allocs = alloc_nr(obj_allocs);
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objs = realloc(objs, obj_allocs * sizeof(struct object *));
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}
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/* Insert it into the right place */
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memmove(objs + pos + 1, objs + pos, (nr_objs - pos) *
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sizeof(struct object *));
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objs[pos] = obj;
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nr_objs++;
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}
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void add_ref(struct object *refer, struct object *target)
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{
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struct object_list **pp = &refer->refs;
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struct object_list *p;
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while ((p = *pp) != NULL) {
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if (p->item == target)
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return;
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pp = &p->next;
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}
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target->used = 1;
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p = malloc(sizeof(*p));
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p->item = target;
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p->next = NULL;
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*pp = p;
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}
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void mark_reachable(struct object *obj, unsigned int mask)
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{
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struct object_list *p = obj->refs;
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/* If we've been here already, don't bother */
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if (obj->flags & mask)
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return;
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obj->flags |= mask;
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while (p) {
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mark_reachable(p->item, mask);
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p = p->next;
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}
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}
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