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src/core/ngx_hash.h - nginx-1.7.10

Data types defined

Macros defined

Source code


  2. /*
  3. * Copyright (C) Igor Sysoev
  4. * Copyright (C) Nginx, Inc.
  5. */


  8. #ifndef _NGX_HASH_H_INCLUDED_
  9. ‌#define _NGX_HASH_H_INCLUDED_


  12. #include <ngx_config.h>
  13. #include <ngx_core.h>


  16. typedef struct {
  17.     void             *value;
  18.     u_short           len;
  19.     u_char            name[1];
  20. ‌} ngx_hash_elt_t;


  23. typedef struct {
  24.     ngx_hash_elt_t  **buckets;
  25.     ngx_uint_t        size;
  26. ‌} ngx_hash_t;


  29. typedef struct {
  30.     ngx_hash_t        hash;
  31.     void             *value;
  32. ‌} ngx_hash_wildcard_t;


  35. typedef struct {
  36.     ngx_str_t         key;
  37.     ngx_uint_t        key_hash;
  38.     void             *value;
  39. ‌} ngx_hash_key_t;


  42. ‌typedef ngx_uint_t (*ngx_hash_key_pt) (u_char *data, size_t len);


  45. typedef struct {
  46.     ngx_hash_t            hash;
  47.     ngx_hash_wildcard_t  *wc_head;
  48.     ngx_hash_wildcard_t  *wc_tail;
  49. ‌} ngx_hash_combined_t;


  52. typedef struct {
  53.     ngx_hash_t       *hash;
  54.     ngx_hash_key_pt   key;

  56.     ngx_uint_t        max_size;
  57.     ngx_uint_t        bucket_size;

  59.     char             *name;
  60.     ngx_pool_t       *pool;
  61.     ngx_pool_t       *temp_pool;
  62. ‌} ngx_hash_init_t;


  65. ‌#define NGX_HASH_SMALL            1
  66. ‌#define NGX_HASH_LARGE            2

  68. ‌#define NGX_HASH_LARGE_ASIZE      16384
  69. ‌#define NGX_HASH_LARGE_HSIZE      10007

  71. ‌#define NGX_HASH_WILDCARD_KEY     1
  72. ‌#define NGX_HASH_READONLY_KEY     2


  75. typedef struct {
  76.     ngx_uint_t        hsize;

  78.     ngx_pool_t       *pool;
  79.     ngx_pool_t       *temp_pool;

  81.     ngx_array_t       keys;
  82.     ngx_array_t      *keys_hash;

  84.     ngx_array_t       dns_wc_head;
  85.     ngx_array_t      *dns_wc_head_hash;

  87.     ngx_array_t       dns_wc_tail;
  88.     ngx_array_t      *dns_wc_tail_hash;
  89. ‌} ngx_hash_keys_arrays_t;


  92. typedef struct {
  93.     ngx_uint_t        hash;
  94.     ngx_str_t         key;
  95.     ngx_str_t         value;
  96.     u_char           *lowcase_key;
  97. ‌} ngx_table_elt_t;


  100. void *ngx_hash_find(ngx_hash_t *hash, ngx_uint_t key, u_char *name, size_t len);
  101. void *ngx_hash_find_wc_head(ngx_hash_wildcard_t *hwc, u_char *name, size_t len);
  102. void *ngx_hash_find_wc_tail(ngx_hash_wildcard_t *hwc, u_char *name, size_t len);
  103. void *ngx_hash_find_combined(ngx_hash_combined_t *hash, ngx_uint_t key,
  104.     u_char *name, size_t len);

  106. ngx_int_t ngx_hash_init(ngx_hash_init_t *hinit, ngx_hash_key_t *names,
  107.     ngx_uint_t nelts);
  108. ngx_int_t ngx_hash_wildcard_init(ngx_hash_init_t *hinit, ngx_hash_key_t *names,
  109.     ngx_uint_t nelts);

  111. ‌#define ngx_hash(key, c)   ((ngx_uint_t) key * 31 + c)
  112. ngx_uint_t ngx_hash_key(u_char *data, size_t len);
  113. ngx_uint_t ngx_hash_key_lc(u_char *data, size_t len);
  114. ngx_uint_t ngx_hash_strlow(u_char *dst, u_char *src, size_t n);


  117. ngx_int_t ngx_hash_keys_array_init(ngx_hash_keys_arrays_t *ha, ngx_uint_t type);
  118. ngx_int_t ngx_hash_add_key(ngx_hash_keys_arrays_t *ha, ngx_str_t *key,
  119.     void *value, ngx_uint_t flags);


  122. #endif /* _NGX_HASH_H_INCLUDED_ */

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