Use khash 0.2.8 (#1047)
The previously used version of khash trigged some static code analysis
warnings that are gone with the latest version:
9a063b33ef/khash.h
This commit is contained in:
Gregor Jasny
GitHub
parent
945f290c03
commit
8cb2282598
@ -1,6 +1,6 @@
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/* The MIT License
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Copyright (c) 2008, by Attractive Chaos <attractivechaos@aol.co.uk>
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Copyright (c) 2008, 2009, 2011 by Attractive Chaos <attractor@live.co.uk>
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Permission is hereby granted, free of charge, to any person obtaining
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a copy of this software and associated documentation files (the
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@ -21,11 +21,6 @@
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ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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*/
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/* Changes, 2011-2012:
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proprietary header added, with proprietary memory management functions.
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*/
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/*
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@ -38,7 +33,6 @@ int main() {
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khiter_t k;
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khash_t(32) *h = kh_init(32);
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k = kh_put(32, h, 5, &ret);
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if (!ret) kh_del(32, h, k);
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kh_value(h, k) = 10;
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k = kh_get(32, h, 10);
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is_missing = (k == kh_end(h));
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@ -52,6 +46,46 @@ int main() {
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*/
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/*
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2013-05-02 (0.2.8):
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* Use quadratic probing. When the capacity is power of 2, stepping function
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i*(i+1)/2 guarantees to traverse each bucket. It is better than double
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hashing on cache performance and is more robust than linear probing.
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In theory, double hashing should be more robust than quadratic probing.
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However, my implementation is probably not for large hash tables, because
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the second hash function is closely tied to the first hash function,
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which reduce the effectiveness of double hashing.
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Reference: http://research.cs.vt.edu/AVresearch/hashing/quadratic.php
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2011-12-29 (0.2.7):
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* Minor code clean up; no actual effect.
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2011-09-16 (0.2.6):
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* The capacity is a power of 2. This seems to dramatically improve the
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speed for simple keys. Thank Zilong Tan for the suggestion. Reference:
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- http://code.google.com/p/ulib/
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- http://nothings.org/computer/judy/
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* Allow to optionally use linear probing which usually has better
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performance for random input. Double hashing is still the default as it
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is more robust to certain non-random input.
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* Added Wang's integer hash function (not used by default). This hash
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function is more robust to certain non-random input.
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2011-02-14 (0.2.5):
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* Allow to declare global functions.
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2009-09-26 (0.2.4):
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* Improve portability
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2008-09-19 (0.2.3):
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* Corrected the example
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@ -83,30 +117,51 @@ int main() {
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#ifndef __AC_KHASH_H
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#define __AC_KHASH_H
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#define AC_VERSION_KHASH_H "0.2.2"
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/*!
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@header
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#include "ns_turn_defs.h"
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Generic hash table library.
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*/
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typedef uint32_t khint_t;
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#define AC_VERSION_KHASH_H "0.2.8"
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#include <stdlib.h>
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#include <string.h>
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#include <limits.h>
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/* compiler specific configuration */
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#if UINT_MAX == 0xffffffffu
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typedef unsigned int khint32_t;
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#elif ULONG_MAX == 0xffffffffu
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typedef unsigned long khint32_t;
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#endif
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#if ULONG_MAX == ULLONG_MAX
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typedef unsigned long khint64_t;
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#else
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typedef unsigned long long khint64_t;
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#endif
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#ifndef kh_inline
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#ifdef _MSC_VER
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#define kh_inline __inline
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#else
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#define kh_inline inline
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#endif
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#endif /* kh_inline */
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#ifndef klib_unused
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#if (defined __clang__ && __clang_major__ >= 3) || (defined __GNUC__ && __GNUC__ >= 3)
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#define klib_unused __attribute__ ((__unused__))
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#else
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#define klib_unused
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#endif
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#endif /* klib_unused */
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typedef khint32_t khint_t;
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typedef khint_t khiter_t;
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typedef struct _str_chunk_t {
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const char *str;
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size_t len;
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} str_chunk_t;
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#define __ac_HASH_PRIME_SIZE 32
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static const uint32_t __ac_prime_list[__ac_HASH_PRIME_SIZE] =
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{
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0ul, 3ul, 11ul, 23ul, 53ul,
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97ul, 193ul, 389ul, 769ul, 1543ul,
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3079ul, 6151ul, 12289ul, 24593ul, 49157ul,
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98317ul, 196613ul, 393241ul, 786433ul, 1572869ul,
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3145739ul, 6291469ul, 12582917ul, 25165843ul, 50331653ul,
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100663319ul, 201326611ul, 402653189ul, 805306457ul, 1610612741ul,
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3221225473ul, 4294967291ul
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};
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#define __ac_isempty(flag, i) ((flag[i>>4]>>((i&0xfU)<<1))&2)
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#define __ac_isdel(flag, i) ((flag[i>>4]>>((i&0xfU)<<1))&1)
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#define __ac_iseither(flag, i) ((flag[i>>4]>>((i&0xfU)<<1))&3)
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@ -115,93 +170,121 @@ static const uint32_t __ac_prime_list[__ac_HASH_PRIME_SIZE] =
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#define __ac_set_isboth_false(flag, i) (flag[i>>4]&=~(3ul<<((i&0xfU)<<1)))
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#define __ac_set_isdel_true(flag, i) (flag[i>>4]|=1ul<<((i&0xfU)<<1))
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#define __ac_fsize(m) ((m) < 16? 1 : (m)>>4)
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#ifndef kroundup32
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#define kroundup32(x) (--(x), (x)|=(x)>>1, (x)|=(x)>>2, (x)|=(x)>>4, (x)|=(x)>>8, (x)|=(x)>>16, ++(x))
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#endif
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#ifndef kcalloc
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#define kcalloc(N,Z) calloc(N,Z)
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#endif
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#ifndef kmalloc
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#define kmalloc(Z) malloc(Z)
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#endif
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#ifndef krealloc
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#define krealloc(P,Z) realloc(P,Z)
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#endif
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#ifndef kfree
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#define kfree(P) free(P)
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#endif
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static const double __ac_HASH_UPPER = 0.77;
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#define KHASH_INIT(name, khkey_t, khval_t, kh_is_map, __hash_func, __hash_equal) \
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typedef struct { \
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khint_t n_buckets, size, n_occupied, upper_bound; \
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uint32_t *flags; uint32_t flags_size; \
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khkey_t *keys; uint32_t keys_size; \
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khval_t *vals; uint32_t vals_size; \
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} kh_##name##_t; \
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static inline kh_##name##_t *kh_init_##name(void) { \
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return (kh_##name##_t*)calloc(1, sizeof(kh_##name##_t)); \
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#define __KHASH_TYPE(name, khkey_t, khval_t) \
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typedef struct kh_##name##_s { \
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khint_t n_buckets, size, n_occupied, upper_bound; \
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khint32_t *flags; \
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khkey_t *keys; \
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khval_t *vals; \
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} kh_##name##_t;
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#define __KHASH_PROTOTYPES(name, khkey_t, khval_t) \
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extern kh_##name##_t *kh_init_##name(void); \
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extern void kh_destroy_##name(kh_##name##_t *h); \
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extern void kh_clear_##name(kh_##name##_t *h); \
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extern khint_t kh_get_##name(const kh_##name##_t *h, khkey_t key); \
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extern int kh_resize_##name(kh_##name##_t *h, khint_t new_n_buckets); \
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extern khint_t kh_put_##name(kh_##name##_t *h, khkey_t key, int *ret); \
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extern void kh_del_##name(kh_##name##_t *h, khint_t x);
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#define __KHASH_IMPL(name, SCOPE, khkey_t, khval_t, kh_is_map, __hash_func, __hash_equal) \
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SCOPE kh_##name##_t *kh_init_##name(void) { \
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return (kh_##name##_t*)kcalloc(1, sizeof(kh_##name##_t)); \
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} \
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static inline void kh_destroy_##name(kh_##name##_t *h) \
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SCOPE void kh_destroy_##name(kh_##name##_t *h) \
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{ \
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if (h) { \
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free(h->keys); free(h->flags); \
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free(h->vals); \
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free(h); \
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} \
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kfree((void *)h->keys); kfree(h->flags); \
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kfree((void *)h->vals); \
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kfree(h); \
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} \
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} \
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static inline void kh_clear_##name(kh_##name##_t *h) \
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SCOPE void kh_clear_##name(kh_##name##_t *h) \
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{ \
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if (h && h->flags) { \
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memset(h->flags, 0xaa, ((h->n_buckets>>4) + 1) * sizeof(uint32_t)); \
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if (h && h->flags) { \
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memset(h->flags, 0xaa, __ac_fsize(h->n_buckets) * sizeof(khint32_t)); \
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h->size = h->n_occupied = 0; \
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} \
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} \
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static inline khint_t kh_get_##name(kh_##name##_t *h, khkey_t key) \
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SCOPE khint_t kh_get_##name(const kh_##name##_t *h, khkey_t key) \
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{ \
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if (h->n_buckets) { \
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khint_t inc, k, i, last; \
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k = __hash_func(key); i = k % h->n_buckets; \
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inc = 1 + k % (h->n_buckets - 1); last = i; \
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khint_t k, i, last, mask, step = 0; \
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mask = h->n_buckets - 1; \
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k = __hash_func(key); i = k & mask; \
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last = i; \
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while (!__ac_isempty(h->flags, i) && (__ac_isdel(h->flags, i) || !__hash_equal(h->keys[i], key))) { \
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if (i + inc >= h->n_buckets) i = i + inc - h->n_buckets; \
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else i += inc; \
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i = (i + (++step)) & mask; \
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if (i == last) return h->n_buckets; \
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} \
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return __ac_iseither(h->flags, i)? h->n_buckets : i; \
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return __ac_iseither(h->flags, i)? h->n_buckets : i; \
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} else return 0; \
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} \
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static inline void kh_resize_##name(kh_##name##_t *h, khint_t new_n_buckets) \
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{ \
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uint32_t *new_flags = 0; \
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uint32_t new_flags_size = 0; \
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SCOPE int kh_resize_##name(kh_##name##_t *h, khint_t new_n_buckets) \
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{ /* This function uses 0.25*n_buckets bytes of working space instead of [sizeof(key_t+val_t)+.25]*n_buckets. */ \
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khint32_t *new_flags = 0; \
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khint_t j = 1; \
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{ \
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khint_t t = __ac_HASH_PRIME_SIZE - 1; \
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while (__ac_prime_list[t] > new_n_buckets) --t; \
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new_n_buckets = __ac_prime_list[t+1]; \
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if (h->size >= (khint_t)(new_n_buckets * __ac_HASH_UPPER + 0.5)) j = 0; \
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else { \
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new_flags_size = ((new_n_buckets>>4) + 1) * sizeof(uint32_t); \
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new_flags = (uint32_t*)malloc(new_flags_size); \
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memset(new_flags, 0xaa, new_flags_size); \
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if (h->n_buckets < new_n_buckets) { \
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h->keys = (khkey_t*)realloc(h->keys, new_n_buckets * sizeof(khkey_t)); \
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h->keys_size = new_n_buckets * sizeof(khkey_t); \
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if (kh_is_map) { \
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h->vals = (khval_t*)realloc(h->vals, new_n_buckets * sizeof(khval_t)); \
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h->vals_size = new_n_buckets * sizeof(khval_t); \
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} \
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} \
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} \
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} \
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if (j) { \
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kroundup32(new_n_buckets); \
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if (new_n_buckets < 4) new_n_buckets = 4; \
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if (h->size >= (khint_t)(new_n_buckets * __ac_HASH_UPPER + 0.5)) j = 0; /* requested size is too small */ \
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else { /* hash table size to be changed (shrink or expand); rehash */ \
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new_flags = (khint32_t*)kmalloc(__ac_fsize(new_n_buckets) * sizeof(khint32_t)); \
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if (!new_flags) return -1; \
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memset(new_flags, 0xaa, __ac_fsize(new_n_buckets) * sizeof(khint32_t)); \
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if (h->n_buckets < new_n_buckets) { /* expand */ \
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khkey_t *new_keys = (khkey_t*)krealloc((void *)h->keys, new_n_buckets * sizeof(khkey_t)); \
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if (!new_keys) { kfree(new_flags); return -1; } \
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h->keys = new_keys; \
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if (kh_is_map) { \
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khval_t *new_vals = (khval_t*)krealloc((void *)h->vals, new_n_buckets * sizeof(khval_t)); \
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if (!new_vals) { kfree(new_flags); return -1; } \
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h->vals = new_vals; \
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} \
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} /* otherwise shrink */ \
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} \
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} \
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if (j) { /* rehashing is needed */ \
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for (j = 0; j != h->n_buckets; ++j) { \
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if (__ac_iseither(h->flags, j) == 0) { \
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khkey_t key = h->keys[j]; \
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khval_t val; \
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khint_t new_mask; \
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new_mask = new_n_buckets - 1; \
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if (kh_is_map) val = h->vals[j]; \
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__ac_set_isdel_true(h->flags, j); \
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while (1) { \
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khint_t inc, k, i; \
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while (1) { /* kick-out process; sort of like in Cuckoo hashing */ \
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khint_t k, i, step = 0; \
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k = __hash_func(key); \
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i = k % new_n_buckets; \
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inc = 1 + k % (new_n_buckets - 1); \
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while (!__ac_isempty(new_flags, i)) { \
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if (i + inc >= new_n_buckets) i = i + inc - new_n_buckets; \
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else i += inc; \
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} \
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i = k & new_mask; \
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while (!__ac_isempty(new_flags, i)) i = (i + (++step)) & new_mask; \
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__ac_set_isempty_false(new_flags, i); \
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if (i < h->n_buckets && __ac_iseither(h->flags, i) == 0) { \
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if (i < h->n_buckets && __ac_iseither(h->flags, i) == 0) { /* kick out the existing element */ \
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{ khkey_t tmp = h->keys[i]; h->keys[i] = key; key = tmp; } \
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if (kh_is_map) { khval_t tmp = h->vals[i]; h->vals[i] = val; val = tmp; } \
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__ac_set_isdel_true(h->flags, i); \
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} else { \
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__ac_set_isdel_true(h->flags, i); /* mark it as deleted in the old hash table */ \
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} else { /* write the element and jump out of the loop */ \
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h->keys[i] = key; \
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if (kh_is_map) h->vals[i] = val; \
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break; \
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@ -209,39 +292,39 @@ static const double __ac_HASH_UPPER = 0.77;
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} \
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} \
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} \
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if (h->n_buckets > new_n_buckets) { \
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h->keys = (khkey_t*)realloc(h->keys, new_n_buckets * sizeof(khkey_t)); \
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h->keys_size = new_n_buckets * sizeof(khkey_t); \
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if (kh_is_map) { \
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h->vals = (khval_t*)realloc(h->vals, new_n_buckets * sizeof(khval_t)); \
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h->vals_size = new_n_buckets * sizeof(khval_t); \
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} \
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if (h->n_buckets > new_n_buckets) { /* shrink the hash table */ \
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h->keys = (khkey_t*)krealloc((void *)h->keys, new_n_buckets * sizeof(khkey_t)); \
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if (kh_is_map) h->vals = (khval_t*)krealloc((void *)h->vals, new_n_buckets * sizeof(khval_t)); \
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} \
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free(h->flags); \
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h->flags = new_flags; \
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h->flags_size = new_flags_size; \
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kfree(h->flags); /* free the working space */ \
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h->flags = new_flags; \
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h->n_buckets = new_n_buckets; \
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h->n_occupied = h->size; \
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h->upper_bound = (khint_t)(h->n_buckets * __ac_HASH_UPPER + 0.5); \
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} \
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return 0; \
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} \
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static inline khint_t kh_put_##name(kh_##name##_t *h, khkey_t key, int *ret) \
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SCOPE khint_t kh_put_##name(kh_##name##_t *h, khkey_t key, int *ret) \
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{ \
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khint_t x; \
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if (h->n_occupied >= h->upper_bound) { \
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if (h->n_buckets > (h->size<<1)) kh_resize_##name(h, h->n_buckets - 1); \
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else kh_resize_##name(h, h->n_buckets + 1); \
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} \
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if (h->n_occupied >= h->upper_bound) { /* update the hash table */ \
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if (h->n_buckets > (h->size<<1)) { \
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if (kh_resize_##name(h, h->n_buckets - 1) < 0) { /* clear "deleted" elements */ \
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*ret = -1; return h->n_buckets; \
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} \
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} else if (kh_resize_##name(h, h->n_buckets + 1) < 0) { /* expand the hash table */ \
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*ret = -1; return h->n_buckets; \
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} \
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} /* TODO: to implement automatically shrinking; resize() already support shrinking */ \
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{ \
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khint_t inc, k, i, site, last; \
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x = site = h->n_buckets; k = __hash_func(key); i = k % h->n_buckets; \
|
||||
if (__ac_isempty(h->flags, i)) x = i; \
|
||||
khint_t k, i, site, last, mask = h->n_buckets - 1, step = 0; \
|
||||
x = site = h->n_buckets; k = __hash_func(key); i = k & mask; \
|
||||
if (__ac_isempty(h->flags, i)) x = i; /* for speed up */ \
|
||||
else { \
|
||||
inc = 1 + k % (h->n_buckets - 1); last = i; \
|
||||
last = i; \
|
||||
while (!__ac_isempty(h->flags, i) && (__ac_isdel(h->flags, i) || !__hash_equal(h->keys[i], key))) { \
|
||||
if (__ac_isdel(h->flags, i)) site = i; \
|
||||
if (i + inc >= h->n_buckets) i = i + inc - h->n_buckets; \
|
||||
else i += inc; \
|
||||
i = (i + (++step)) & mask; \
|
||||
if (i == last) { x = site; break; } \
|
||||
} \
|
||||
if (x == h->n_buckets) { \
|
||||
@ -250,20 +333,20 @@ static const double __ac_HASH_UPPER = 0.77;
|
||||
} \
|
||||
} \
|
||||
} \
|
||||
if (__ac_isempty(h->flags, x)) { \
|
||||
if (__ac_isempty(h->flags, x)) { /* not present at all */ \
|
||||
h->keys[x] = key; \
|
||||
__ac_set_isboth_false(h->flags, x); \
|
||||
++h->size; ++h->n_occupied; \
|
||||
*ret = 1; \
|
||||
} else if (__ac_isdel(h->flags, x)) { \
|
||||
} else if (__ac_isdel(h->flags, x)) { /* deleted */ \
|
||||
h->keys[x] = key; \
|
||||
__ac_set_isboth_false(h->flags, x); \
|
||||
++h->size; \
|
||||
*ret = 2; \
|
||||
} else *ret = 0; \
|
||||
} else *ret = 0; /* Don't touch h->keys[x] if present and not deleted */ \
|
||||
return x; \
|
||||
} \
|
||||
static inline void kh_del_##name(kh_##name##_t *h, khint_t x) \
|
||||
SCOPE void kh_del_##name(kh_##name##_t *h, khint_t x) \
|
||||
{ \
|
||||
if (x != h->n_buckets && !__ac_iseither(h->flags, x)) { \
|
||||
__ac_set_isdel_true(h->flags, x); \
|
||||
@ -271,121 +354,274 @@ static const double __ac_HASH_UPPER = 0.77;
|
||||
} \
|
||||
}
|
||||
|
||||
#define KHASH_DECLARE(name, khkey_t, khval_t) \
|
||||
__KHASH_TYPE(name, khkey_t, khval_t) \
|
||||
__KHASH_PROTOTYPES(name, khkey_t, khval_t)
|
||||
|
||||
#define KHASH_INIT2(name, SCOPE, khkey_t, khval_t, kh_is_map, __hash_func, __hash_equal) \
|
||||
__KHASH_TYPE(name, khkey_t, khval_t) \
|
||||
__KHASH_IMPL(name, SCOPE, khkey_t, khval_t, kh_is_map, __hash_func, __hash_equal)
|
||||
|
||||
#define KHASH_INIT(name, khkey_t, khval_t, kh_is_map, __hash_func, __hash_equal) \
|
||||
KHASH_INIT2(name, static kh_inline klib_unused, khkey_t, khval_t, kh_is_map, __hash_func, __hash_equal)
|
||||
|
||||
/* --- BEGIN OF HASH FUNCTIONS --- */
|
||||
|
||||
#define kh_int_hash_func(key) (uint32_t)((key<<3) + nswap32(key>>7))
|
||||
#define kh_int_hash_equal(a, b) (a == b)
|
||||
#define kh_int64_hash_func(key) (uint32_t)((key)>>33^(key)^(key)<<11)
|
||||
#define kh_int64_hash_equal(a, b) (a == b)
|
||||
|
||||
static inline khint_t __ac_X31_hash_string(const char *s)
|
||||
/*! @function
|
||||
@abstract Integer hash function
|
||||
@param key The integer [khint32_t]
|
||||
@return The hash value [khint_t]
|
||||
*/
|
||||
#define kh_int_hash_func(key) (khint32_t)(key)
|
||||
/*! @function
|
||||
@abstract Integer comparison function
|
||||
*/
|
||||
#define kh_int_hash_equal(a, b) ((a) == (b))
|
||||
/*! @function
|
||||
@abstract 64-bit integer hash function
|
||||
@param key The integer [khint64_t]
|
||||
@return The hash value [khint_t]
|
||||
*/
|
||||
#define kh_int64_hash_func(key) (khint32_t)((key)>>33^(key)^(key)<<11)
|
||||
/*! @function
|
||||
@abstract 64-bit integer comparison function
|
||||
*/
|
||||
#define kh_int64_hash_equal(a, b) ((a) == (b))
|
||||
/*! @function
|
||||
@abstract const char* hash function
|
||||
@param s Pointer to a null terminated string
|
||||
@return The hash value
|
||||
*/
|
||||
static kh_inline khint_t __ac_X31_hash_string(const char *s)
|
||||
{
|
||||
khint_t h = *s;
|
||||
if (h)
|
||||
for (++s; *s; ++s)
|
||||
h = (h << 5) - h + *s;
|
||||
return h;
|
||||
}
|
||||
static inline khint_t __ac_X31_hash_cstring(const char *s)
|
||||
{
|
||||
khint_t h = tolower((int)*s);
|
||||
if (h)
|
||||
for (++s; *s; ++s)
|
||||
h = (h << 5) - h + tolower((int)*s);
|
||||
return h;
|
||||
}
|
||||
static inline khint_t __ac_X31_hash_nstring(const str_chunk_t *s)
|
||||
{
|
||||
khint_t h = *(s->str);
|
||||
if (h) {
|
||||
size_t i;
|
||||
for (i = 0; i < s->len; i++)
|
||||
h = (h << 5) - h + s->str[i];
|
||||
}
|
||||
return h;
|
||||
}
|
||||
static inline khint_t __ac_X31_hash_ncstring(const str_chunk_t *s)
|
||||
{
|
||||
khint_t h = tolower((int)(*(s->str)));
|
||||
if (h) {
|
||||
size_t i;
|
||||
for (i = 0; i < s->len; i++)
|
||||
h = (h << 5) - h + tolower((int)(s->str[i]));
|
||||
}
|
||||
khint_t h = (khint_t)*s;
|
||||
if (h) for (++s ; *s; ++s) h = (h << 5) - h + (khint_t)*s;
|
||||
return h;
|
||||
}
|
||||
/*! @function
|
||||
@abstract Another interface to const char* hash function
|
||||
@param key Pointer to a null terminated string [const char*]
|
||||
@return The hash value [khint_t]
|
||||
*/
|
||||
#define kh_str_hash_func(key) __ac_X31_hash_string(key)
|
||||
/*! @function
|
||||
@abstract Const char* comparison function
|
||||
*/
|
||||
#define kh_str_hash_equal(a, b) (strcmp(a, b) == 0)
|
||||
#define kh_cstr_hash_func(key) __ac_X31_hash_cstring(key)
|
||||
#define kh_cstr_hash_equal(a, b) (strcasecmp(a, b) == 0)
|
||||
#define kh_nstr_hash_func(key) __ac_X31_hash_nstring(key)
|
||||
#define kh_nstr_hash_equal(a, b) (a->len == b->len && (strncmp(a->str, b->str, a->len) == 0))
|
||||
#define kh_ncstr_hash_func(key) __ac_X31_hash_ncstring(key)
|
||||
#define kh_ncstr_hash_equal(a, b) (a->len == b->len && (strncasecmp(a->str, b->str, a->len) == 0))
|
||||
|
||||
static kh_inline khint_t __ac_Wang_hash(khint_t key)
|
||||
{
|
||||
key += ~(key << 15);
|
||||
key ^= (key >> 10);
|
||||
key += (key << 3);
|
||||
key ^= (key >> 6);
|
||||
key += ~(key << 11);
|
||||
key ^= (key >> 16);
|
||||
return key;
|
||||
}
|
||||
#define kh_int_hash_func2(key) __ac_Wang_hash((khint_t)key)
|
||||
|
||||
/* --- END OF HASH FUNCTIONS --- */
|
||||
|
||||
/* Other necessary macros... */
|
||||
/* Other convenient macros... */
|
||||
|
||||
/*!
|
||||
@abstract Type of the hash table.
|
||||
@param name Name of the hash table [symbol]
|
||||
*/
|
||||
#define khash_t(name) kh_##name##_t
|
||||
|
||||
/*! @function
|
||||
@abstract Initiate a hash table.
|
||||
@param name Name of the hash table [symbol]
|
||||
@return Pointer to the hash table [khash_t(name)*]
|
||||
*/
|
||||
#define kh_init(name) kh_init_##name()
|
||||
|
||||
/*! @function
|
||||
@abstract Destroy a hash table.
|
||||
@param name Name of the hash table [symbol]
|
||||
@param h Pointer to the hash table [khash_t(name)*]
|
||||
*/
|
||||
#define kh_destroy(name, h) kh_destroy_##name(h)
|
||||
|
||||
/*! @function
|
||||
@abstract Reset a hash table without deallocating memory.
|
||||
@param name Name of the hash table [symbol]
|
||||
@param h Pointer to the hash table [khash_t(name)*]
|
||||
*/
|
||||
#define kh_clear(name, h) kh_clear_##name(h)
|
||||
|
||||
/*! @function
|
||||
@abstract Resize a hash table.
|
||||
@param name Name of the hash table [symbol]
|
||||
@param h Pointer to the hash table [khash_t(name)*]
|
||||
@param s New size [khint_t]
|
||||
*/
|
||||
#define kh_resize(name, h, s) kh_resize_##name(h, s)
|
||||
|
||||
/*! @function
|
||||
@abstract Insert a key to the hash table.
|
||||
@param name Name of the hash table [symbol]
|
||||
@param h Pointer to the hash table [khash_t(name)*]
|
||||
@param k Key [type of keys]
|
||||
@param r Extra return code: -1 if the operation failed;
|
||||
0 if the key is present in the hash table;
|
||||
1 if the bucket is empty (never used); 2 if the element in
|
||||
the bucket has been deleted [int*]
|
||||
@return Iterator to the inserted element [khint_t]
|
||||
*/
|
||||
#define kh_put(name, h, k, r) kh_put_##name(h, k, r)
|
||||
|
||||
/*! @function
|
||||
@abstract Retrieve a key from the hash table.
|
||||
@param name Name of the hash table [symbol]
|
||||
@param h Pointer to the hash table [khash_t(name)*]
|
||||
@param k Key [type of keys]
|
||||
@return Iterator to the found element, or kh_end(h) if the element is absent [khint_t]
|
||||
*/
|
||||
#define kh_get(name, h, k) kh_get_##name(h, k)
|
||||
|
||||
/*! @function
|
||||
@abstract Remove a key from the hash table.
|
||||
@param name Name of the hash table [symbol]
|
||||
@param h Pointer to the hash table [khash_t(name)*]
|
||||
@param k Iterator to the element to be deleted [khint_t]
|
||||
*/
|
||||
#define kh_del(name, h, k) kh_del_##name(h, k)
|
||||
|
||||
/*! @function
|
||||
@abstract Test whether a bucket contains data.
|
||||
@param h Pointer to the hash table [khash_t(name)*]
|
||||
@param x Iterator to the bucket [khint_t]
|
||||
@return 1 if containing data; 0 otherwise [int]
|
||||
*/
|
||||
#define kh_exist(h, x) (!__ac_iseither((h)->flags, (x)))
|
||||
|
||||
/*! @function
|
||||
@abstract Get key given an iterator
|
||||
@param h Pointer to the hash table [khash_t(name)*]
|
||||
@param x Iterator to the bucket [khint_t]
|
||||
@return Key [type of keys]
|
||||
*/
|
||||
#define kh_key(h, x) ((h)->keys[x])
|
||||
|
||||
/*! @function
|
||||
@abstract Get value given an iterator
|
||||
@param h Pointer to the hash table [khash_t(name)*]
|
||||
@param x Iterator to the bucket [khint_t]
|
||||
@return Value [type of values]
|
||||
@discussion For hash sets, calling this results in segfault.
|
||||
*/
|
||||
#define kh_val(h, x) ((h)->vals[x])
|
||||
|
||||
/*! @function
|
||||
@abstract Alias of kh_val()
|
||||
*/
|
||||
#define kh_value(h, x) ((h)->vals[x])
|
||||
|
||||
/*! @function
|
||||
@abstract Get the start iterator
|
||||
@param h Pointer to the hash table [khash_t(name)*]
|
||||
@return The start iterator [khint_t]
|
||||
*/
|
||||
#define kh_begin(h) (khint_t)(0)
|
||||
|
||||
/*! @function
|
||||
@abstract Get the end iterator
|
||||
@param h Pointer to the hash table [khash_t(name)*]
|
||||
@return The end iterator [khint_t]
|
||||
*/
|
||||
#define kh_end(h) ((h)->n_buckets)
|
||||
|
||||
/*! @function
|
||||
@abstract Get the number of elements in the hash table
|
||||
@param h Pointer to the hash table [khash_t(name)*]
|
||||
@return Number of elements in the hash table [khint_t]
|
||||
*/
|
||||
#define kh_size(h) ((h)->size)
|
||||
|
||||
/*! @function
|
||||
@abstract Get the number of buckets in the hash table
|
||||
@param h Pointer to the hash table [khash_t(name)*]
|
||||
@return Number of buckets in the hash table [khint_t]
|
||||
*/
|
||||
#define kh_n_buckets(h) ((h)->n_buckets)
|
||||
|
||||
/*! @function
|
||||
@abstract Iterate over the entries in the hash table
|
||||
@param h Pointer to the hash table [khash_t(name)*]
|
||||
@param kvar Variable to which key will be assigned
|
||||
@param vvar Variable to which value will be assigned
|
||||
@param code Block of code to execute
|
||||
*/
|
||||
#define kh_foreach(h, kvar, vvar, code) { khint_t __i; \
|
||||
for (__i = kh_begin(h); __i != kh_end(h); ++__i) { \
|
||||
if (!kh_exist(h,__i)) continue; \
|
||||
(kvar) = kh_key(h,__i); \
|
||||
(vvar) = kh_val(h,__i); \
|
||||
code; \
|
||||
} }
|
||||
|
||||
/*! @function
|
||||
@abstract Iterate over the values in the hash table
|
||||
@param h Pointer to the hash table [khash_t(name)*]
|
||||
@param vvar Variable to which value will be assigned
|
||||
@param code Block of code to execute
|
||||
*/
|
||||
#define kh_foreach_value(h, vvar, code) { khint_t __i; \
|
||||
for (__i = kh_begin(h); __i != kh_end(h); ++__i) { \
|
||||
if (!kh_exist(h,__i)) continue; \
|
||||
(vvar) = kh_val(h,__i); \
|
||||
code; \
|
||||
} }
|
||||
|
||||
/* More convenient interfaces */
|
||||
|
||||
/*! @function
|
||||
@abstract Instantiate a hash set containing integer keys
|
||||
@param name Name of the hash table [symbol]
|
||||
*/
|
||||
#define KHASH_SET_INIT_INT(name) \
|
||||
KHASH_INIT(name, uint32_t, char, 0, kh_int_hash_func, kh_int_hash_equal)
|
||||
KHASH_INIT(name, khint32_t, char, 0, kh_int_hash_func, kh_int_hash_equal)
|
||||
|
||||
/*! @function
|
||||
@abstract Instantiate a hash map containing integer keys
|
||||
@param name Name of the hash table [symbol]
|
||||
@param khval_t Type of values [type]
|
||||
*/
|
||||
#define KHASH_MAP_INIT_INT(name, khval_t) \
|
||||
KHASH_INIT(name, uint32_t, khval_t, 1, kh_int_hash_func, kh_int_hash_equal)
|
||||
KHASH_INIT(name, khint32_t, khval_t, 1, kh_int_hash_func, kh_int_hash_equal)
|
||||
|
||||
/*! @function
|
||||
@abstract Instantiate a hash set containing 64-bit integer keys
|
||||
@param name Name of the hash table [symbol]
|
||||
*/
|
||||
#define KHASH_SET_INIT_INT64(name) \
|
||||
KHASH_INIT(name, uint64_t, char, 0, kh_int64_hash_func, kh_int64_hash_equal)
|
||||
KHASH_INIT(name, khint64_t, char, 0, kh_int64_hash_func, kh_int64_hash_equal)
|
||||
|
||||
/*! @function
|
||||
@abstract Instantiate a hash map containing 64-bit integer keys
|
||||
@param name Name of the hash table [symbol]
|
||||
@param khval_t Type of values [type]
|
||||
*/
|
||||
#define KHASH_MAP_INIT_INT64(name, khval_t) \
|
||||
KHASH_INIT(name, uint64_t, khval_t, 1, kh_int64_hash_func, kh_int64_hash_equal)
|
||||
KHASH_INIT(name, khint64_t, khval_t, 1, kh_int64_hash_func, kh_int64_hash_equal)
|
||||
|
||||
typedef const char *kh_cstr_t;
|
||||
typedef const str_chunk_t *kh_ncstr_t;
|
||||
/*! @function
|
||||
@abstract Instantiate a hash map containing const char* keys
|
||||
@param name Name of the hash table [symbol]
|
||||
*/
|
||||
#define KHASH_SET_INIT_STR(name) \
|
||||
KHASH_INIT(name, kh_cstr_t, char, 0, kh_str_hash_func, kh_str_hash_equal)
|
||||
|
||||
/*! @function
|
||||
@abstract Instantiate a hash map containing const char* keys
|
||||
@param name Name of the hash table [symbol]
|
||||
@param khval_t Type of values [type]
|
||||
*/
|
||||
#define KHASH_MAP_INIT_STR(name, khval_t) \
|
||||
KHASH_INIT(name, kh_cstr_t, khval_t, 1, kh_str_hash_func, kh_str_hash_equal)
|
||||
|
||||
#define KHASH_SET_INIT_CSTR(name) \
|
||||
KHASH_INIT(name, kh_cstr_t, char, 0, kh_cstr_hash_func, kh_cstr_hash_equal)
|
||||
|
||||
#define KHASH_MAP_INIT_CSTR(name, khval_t) \
|
||||
KHASH_INIT(name, kh_cstr_t, khval_t, 1, kh_cstr_hash_func, kh_cstr_hash_equal)
|
||||
|
||||
#define KHASH_SET_INIT_NSTR(name) \
|
||||
KHASH_INIT(name, kh_ncstr_t, char, 0, kh_nstr_hash_func, kh_nstr_hash_equal)
|
||||
|
||||
#define KHASH_MAP_INIT_NSTR(name, khval_t) \
|
||||
KHASH_INIT(name, kh_ncstr_t, khval_t, 1, kh_nstr_hash_func, kh_nstr_hash_equal)
|
||||
|
||||
#define KHASH_SET_INIT_NCSTR(name) \
|
||||
KHASH_INIT(name, kh_ncstr_t, char, 0, kh_ncstr_hash_func, kh_ncstr_hash_equal)
|
||||
|
||||
#define KHASH_MAP_INIT_NCSTR(name, khval_t) \
|
||||
KHASH_INIT(name, kh_ncstr_t, khval_t, 1, kh_ncstr_hash_func, kh_ncstr_hash_equal)
|
||||
|
||||
//////////////////////////////////////////////
|
||||
|
||||
#endif /* __AC_KHASH_H */
|
||||
|
||||
Loading…
Reference in New Issue
Block a user