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/*
* Copyright (C) Igor Sysoev
* Copyright (C) Nginx, Inc.
*/
#ifndef _NGX_HASH_H_INCLUDED_
#define _NGX_HASH_H_INCLUDED_
#include <ngx_config.h>
#include <ngx_core.h>
typedef struct {
void *value;
u_short len;
u_char name[1];
} ngx_hash_elt_t;
typedef struct {
ngx_hash_elt_t **buckets;
ngx_uint_t size;
} ngx_hash_t;
typedef struct {
ngx_hash_t hash;
void *value;
} ngx_hash_wildcard_t;
typedef struct {
ngx_str_t key;
ngx_uint_t key_hash;
void *value;
} ngx_hash_key_t;
typedef ngx_uint_t (*ngx_hash_key_pt) (u_char *data, size_t len);
typedef struct {
ngx_hash_t hash;
ngx_hash_wildcard_t *wc_head;
ngx_hash_wildcard_t *wc_tail;
} ngx_hash_combined_t;
typedef struct {
ngx_hash_t *hash;
ngx_hash_key_pt key;
ngx_uint_t max_size;
ngx_uint_t bucket_size;
char *name;
ngx_pool_t *pool;
ngx_pool_t *temp_pool;
} ngx_hash_init_t;
#define NGX_HASH_SMALL 1
#define NGX_HASH_LARGE 2
#define NGX_HASH_LARGE_ASIZE 16384
#define NGX_HASH_LARGE_HSIZE 10007
#define NGX_HASH_WILDCARD_KEY 1
#define NGX_HASH_READONLY_KEY 2
typedef struct {
ngx_uint_t hsize;
ngx_pool_t *pool;
ngx_pool_t *temp_pool;
ngx_array_t keys;
ngx_array_t *keys_hash;
ngx_array_t dns_wc_head;
ngx_array_t *dns_wc_head_hash;
ngx_array_t dns_wc_tail;
ngx_array_t *dns_wc_tail_hash;
} ngx_hash_keys_arrays_t;
typedef struct {
ngx_uint_t hash;
ngx_str_t key;
ngx_str_t value;
u_char *lowcase_key;
} ngx_table_elt_t;
void *ngx_hash_find(ngx_hash_t *hash, ngx_uint_t key, u_char *name, size_t len);
void *ngx_hash_find_wc_head(ngx_hash_wildcard_t *hwc, u_char *name, size_t len);
void *ngx_hash_find_wc_tail(ngx_hash_wildcard_t *hwc, u_char *name, size_t len);
void *ngx_hash_find_combined(ngx_hash_combined_t *hash, ngx_uint_t key,
u_char *name, size_t len);
ngx_int_t ngx_hash_init(ngx_hash_init_t *hinit, ngx_hash_key_t *names,
ngx_uint_t nelts);
ngx_int_t ngx_hash_wildcard_init(ngx_hash_init_t *hinit, ngx_hash_key_t *names,
ngx_uint_t nelts);
#define ngx_hash(key, c) ((ngx_uint_t) key * 31 + c)
ngx_uint_t ngx_hash_key(u_char *data, size_t len);
ngx_uint_t ngx_hash_key_lc(u_char *data, size_t len);
ngx_uint_t ngx_hash_strlow(u_char *dst, u_char *src, size_t n);
ngx_int_t ngx_hash_keys_array_init(ngx_hash_keys_arrays_t *ha, ngx_uint_t type);
ngx_int_t ngx_hash_add_key(ngx_hash_keys_arrays_t *ha, ngx_str_t *key,
void *value, ngx_uint_t flags);
#endif /* _NGX_HASH_H_INCLUDED_ */
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