mirror of
https://github.com/git/git.git
synced 2024-11-05 16:52:59 +01:00
2a1a3dce33
Duh. When I did the object decorator thing, I made the "loop over the hash" function use the same logic for updating the hash, ie made them use if (++j >= size) j = 0; for both the hash update for both "insert" and "lookup" HOWEVER. For some inexplicable reason I had an extraneous j++; in the insert path (probably just from the fact that the old code there used j++; if (j >= size) j = 0; and when I made them use the same logic I just didn't remove the old extraneous line properly. This fixes it. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
88 lines
1.8 KiB
C
88 lines
1.8 KiB
C
/*
|
|
* decorate.c - decorate a git object with some arbitrary
|
|
* data.
|
|
*/
|
|
#include "cache.h"
|
|
#include "object.h"
|
|
#include "decorate.h"
|
|
|
|
static unsigned int hash_obj(struct object *obj, unsigned int n)
|
|
{
|
|
unsigned int hash = *(unsigned int *)obj->sha1;
|
|
return hash % n;
|
|
}
|
|
|
|
static void *insert_decoration(struct decoration *n, struct object *base, void *decoration)
|
|
{
|
|
int size = n->size;
|
|
struct object_decoration *hash = n->hash;
|
|
int j = hash_obj(base, size);
|
|
|
|
while (hash[j].base) {
|
|
if (hash[j].base == base) {
|
|
void *old = hash[j].decoration;
|
|
hash[j].decoration = decoration;
|
|
return old;
|
|
}
|
|
if (++j >= size)
|
|
j = 0;
|
|
}
|
|
hash[j].base = base;
|
|
hash[j].decoration = decoration;
|
|
n->nr++;
|
|
return NULL;
|
|
}
|
|
|
|
static void grow_decoration(struct decoration *n)
|
|
{
|
|
int i;
|
|
int old_size = n->size;
|
|
struct object_decoration *old_hash;
|
|
|
|
old_size = n->size;
|
|
old_hash = n->hash;
|
|
|
|
n->size = (old_size + 1000) * 3 / 2;
|
|
n->hash = xcalloc(n->size, sizeof(struct object_decoration));
|
|
n->nr = 0;
|
|
|
|
for (i = 0; i < old_size; i++) {
|
|
struct object *base = old_hash[i].base;
|
|
void *decoration = old_hash[i].decoration;
|
|
|
|
if (!base)
|
|
continue;
|
|
insert_decoration(n, base, decoration);
|
|
}
|
|
free(old_hash);
|
|
}
|
|
|
|
/* Add a decoration pointer, return any old one */
|
|
void *add_decoration(struct decoration *n, struct object *obj, void *decoration)
|
|
{
|
|
int nr = n->nr + 1;
|
|
|
|
if (nr > n->size * 2 / 3)
|
|
grow_decoration(n);
|
|
return insert_decoration(n, obj, decoration);
|
|
}
|
|
|
|
/* Lookup a decoration pointer */
|
|
void *lookup_decoration(struct decoration *n, struct object *obj)
|
|
{
|
|
int j;
|
|
|
|
/* nothing to lookup */
|
|
if (!n->size)
|
|
return NULL;
|
|
j = hash_obj(obj, n->size);
|
|
for (;;) {
|
|
struct object_decoration *ref = n->hash + j;
|
|
if (ref->base == obj)
|
|
return ref->decoration;
|
|
if (!ref->base)
|
|
return NULL;
|
|
if (++j == n->size)
|
|
j = 0;
|
|
}
|
|
}
|