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v0.8.1
v0.8.1
Revision 77ad7a49d3cc946487ca759e5361effbcfb03be5 authored by Junio C Hamano on 05 April 2008, 05:38:32 UTC, committed by Junio C Hamano on 05 April 2008, 05:38:32 UTC
* git://repo.or.cz/git-gui: git-gui: use +/- instead of ]/[ to show more/less context in diff git-gui: Update french translation git-gui: Switch keybindings for [ and ] to bracketleft and bracketright
hash.h
#ifndef HASH_H
#define HASH_H
/*
* These are some simple generic hash table helper functions.
* Not necessarily suitable for all users, but good for things
* where you want to just keep track of a list of things, and
* have a good hash to use on them.
*
* It keeps the hash table at roughly 50-75% free, so the memory
* cost of the hash table itself is roughly
*
* 3 * 2*sizeof(void *) * nr_of_objects
*
* bytes.
*
* FIXME: on 64-bit architectures, we waste memory. It would be
* good to have just 32-bit pointers, requiring a special allocator
* for hashed entries or something.
*/
struct hash_table_entry {
unsigned int hash;
void *ptr;
};
struct hash_table {
unsigned int size, nr;
struct hash_table_entry *array;
};
extern void *lookup_hash(unsigned int hash, const struct hash_table *table);
extern void **insert_hash(unsigned int hash, void *ptr, struct hash_table *table);
extern int for_each_hash(const struct hash_table *table, int (*fn)(void *));
extern void free_hash(struct hash_table *table);
static inline void init_hash(struct hash_table *table)
{
table->size = 0;
table->nr = 0;
table->array = NULL;
}
#endif
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