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/*
* Copyright 2008-2009 Katholieke Universiteit Leuven
*
* Use of this software is governed by the MIT license
*
* Written by Sven Verdoolaege, K.U.Leuven, Departement
* Computerwetenschappen, Celestijnenlaan 200A, B-3001 Leuven, Belgium
*/
#ifndef ISL_HASH_H
#define ISL_HASH_H
#include <stdlib.h>
#include <isl/stdint.h>
#include <isl/ctx.h>
#if defined(__cplusplus)
extern "C" {
#endif
#define isl_hash_init() (2166136261u)
#define isl_hash_byte(h,b) do { \
h *= 16777619; \
h ^= b; \
} while(0)
#define isl_hash_hash(h,h2) \
do { \
isl_hash_byte(h, (h2) & 0xFF); \
isl_hash_byte(h, ((h2) >> 8) & 0xFF); \
isl_hash_byte(h, ((h2) >> 16) & 0xFF); \
isl_hash_byte(h, ((h2) >> 24) & 0xFF); \
} while(0)
#define isl_hash_bits(h,bits) \
((bits) == 32) ? (h) : \
((bits) >= 16) ? \
((h) >> (bits)) ^ ((h) & (((uint32_t)1 << (bits)) - 1)) : \
(((h) >> (bits)) ^ (h)) & (((uint32_t)1 << (bits)) - 1)
uint32_t isl_hash_string(uint32_t hash, const char *s);
uint32_t isl_hash_mem(uint32_t hash, const void *p, size_t len);
#define isl_hash_builtin(h,l) isl_hash_mem(h, &l, sizeof(l))
struct isl_hash_table_entry
{
uint32_t hash;
void *data;
};
struct isl_hash_table {
int bits;
int n;
struct isl_hash_table_entry *entries;
};
struct isl_hash_table *isl_hash_table_alloc(struct isl_ctx *ctx, int min_size);
void isl_hash_table_free(struct isl_ctx *ctx, struct isl_hash_table *table);
int isl_hash_table_init(struct isl_ctx *ctx, struct isl_hash_table *table,
int min_size);
void isl_hash_table_clear(struct isl_hash_table *table);
extern struct isl_hash_table_entry *isl_hash_table_entry_none;
struct isl_hash_table_entry *isl_hash_table_find(struct isl_ctx *ctx,
struct isl_hash_table *table,
uint32_t key_hash,
isl_bool (*eq)(const void *entry, const void *val),
const void *val, int reserve);
isl_stat isl_hash_table_foreach(isl_ctx *ctx, struct isl_hash_table *table,
isl_stat (*fn)(void **entry, void *user), void *user);
void isl_hash_table_remove(struct isl_ctx *ctx,
struct isl_hash_table *table,
struct isl_hash_table_entry *entry);
#if defined(__cplusplus)
}
#endif
#endif
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