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uthash.h
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uthash.h
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/*
Copyright (c) 2003-2017, Troy D. Hanson http://troydhanson.github.com/uthash/
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef UTHASH_H
#define UTHASH_H
#define UTHASH_VERSION 2.0.2
#include <string.h> /* memcmp, memset, strlen */
#include <stddef.h> /* ptrdiff_t */
#include <stdlib.h> /* exit */
/* These macros use decltype or the earlier __typeof GNU extension.
As decltype is only available in newer compilers (VS2010 or gcc 4.3+
when compiling c++ source) this code uses whatever method is needed
or, for VS2008 where neither is available, uses casting workarounds. */
#if !defined(DECLTYPE) && !defined(NO_DECLTYPE)
#if defined(_MSC_VER) /* MS compiler */
#if _MSC_VER >= 1600 && defined(__cplusplus) /* VS2010 or newer in C++ mode */
#define DECLTYPE(x) (decltype(x))
#else /* VS2008 or older (or VS2010 in C mode) */
#define NO_DECLTYPE
#endif
#elif defined(__BORLANDC__) || defined(__ICCARM__) || defined(__LCC__) || defined(__WATCOMC__)
#define NO_DECLTYPE
#else /* GNU, Sun and other compilers */
#define DECLTYPE(x) (__typeof(x))
#endif
#endif
#ifdef NO_DECLTYPE
#define DECLTYPE(x)
#define DECLTYPE_ASSIGN(dst,src) \
do { \
char **_da_dst = (char**)(&(dst)); \
*_da_dst = (char*)(src); \
} while (0)
#else
#define DECLTYPE_ASSIGN(dst,src) \
do { \
(dst) = DECLTYPE(dst)(src); \
} while (0)
#endif
/* a number of the hash function use uint32_t which isn't defined on Pre VS2010 */
#if defined(_WIN32)
#if defined(_MSC_VER) && _MSC_VER >= 1600
#include <stdint.h>
#elif defined(__WATCOMC__) || defined(__MINGW32__) || defined(__CYGWIN__)
#include <stdint.h>
#else
typedef unsigned int uint32_t;
typedef unsigned char uint8_t;
#endif
#elif defined(__GNUC__) && !defined(__VXWORKS__)
#include <stdint.h>
#else
typedef unsigned int uint32_t;
typedef unsigned char uint8_t;
#endif
#ifndef uthash_malloc
#define uthash_malloc(sz) malloc(sz) /* malloc fcn */
#endif
#ifndef uthash_free
#define uthash_free(ptr,sz) free(ptr) /* free fcn */
#endif
#ifndef uthash_bzero
#define uthash_bzero(a,n) memset(a,'\0',n)
#endif
#ifndef uthash_memcmp
#define uthash_memcmp(a,b,n) memcmp(a,b,n)
#endif
#ifndef uthash_strlen
#define uthash_strlen(s) strlen(s)
#endif
#ifndef uthash_noexpand_fyi
#define uthash_noexpand_fyi(tbl) /* can be defined to log noexpand */
#endif
#ifndef uthash_expand_fyi
#define uthash_expand_fyi(tbl) /* can be defined to log expands */
#endif
#ifndef HASH_NONFATAL_OOM
#define HASH_NONFATAL_OOM 0
#endif
#if HASH_NONFATAL_OOM
/* malloc failures can be recovered from */
#ifndef uthash_nonfatal_oom
#define uthash_nonfatal_oom(obj) do {} while (0) /* non-fatal OOM error */
#endif
#define HASH_RECORD_OOM(oomed) do { (oomed) = 1; } while (0)
#define IF_HASH_NONFATAL_OOM(x) x
#else
/* malloc failures result in lost memory, hash tables are unusable */
#ifndef uthash_fatal
#define uthash_fatal(msg) exit(-1) /* fatal OOM error */
#endif
#define HASH_RECORD_OOM(oomed) uthash_fatal("out of memory")
#define IF_HASH_NONFATAL_OOM(x)
#endif
/* initial number of buckets */
#define HASH_INITIAL_NUM_BUCKETS 32U /* initial number of buckets */
#define HASH_INITIAL_NUM_BUCKETS_LOG2 5U /* lg2 of initial number of buckets */
#define HASH_BKT_CAPACITY_THRESH 10U /* expand when bucket count reaches */
/* calculate the element whose hash handle address is hhp */
#define ELMT_FROM_HH(tbl,hhp) ((void*)(((char*)(hhp)) - ((tbl)->hho)))
/* calculate the hash handle from element address elp */
#define HH_FROM_ELMT(tbl,elp) ((UT_hash_handle *)(((char*)(elp)) + ((tbl)->hho)))
#define HASH_ROLLBACK_BKT(hh, head, itemptrhh) \
do { \
struct UT_hash_handle *_hd_hh_item = (itemptrhh); \
unsigned _hd_bkt; \
HASH_TO_BKT(_hd_hh_item->hashv, (head)->hh.tbl->num_buckets, _hd_bkt); \
(head)->hh.tbl->buckets[_hd_bkt].count++; \
_hd_hh_item->hh_next = NULL; \
_hd_hh_item->hh_prev = NULL; \
} while (0)
#define HASH_VALUE(keyptr,keylen,hashv) \
do { \
HASH_FCN(keyptr, keylen, hashv); \
} while (0)
#define HASH_FIND_BYHASHVALUE(hh,head,keyptr,keylen,hashval,out) \
do { \
(out) = NULL; \
if (head) { \
unsigned _hf_bkt; \
HASH_TO_BKT(hashval, (head)->hh.tbl->num_buckets, _hf_bkt); \
if (HASH_BLOOM_TEST((head)->hh.tbl, hashval) != 0) { \
HASH_FIND_IN_BKT((head)->hh.tbl, hh, (head)->hh.tbl->buckets[ _hf_bkt ], keyptr, keylen, hashval, out); \
} \
} \
} while (0)
#define HASH_FIND(hh,head,keyptr,keylen,out) \
do { \
unsigned _hf_hashv; \
HASH_VALUE(keyptr, keylen, _hf_hashv); \
HASH_FIND_BYHASHVALUE(hh, head, keyptr, keylen, _hf_hashv, out); \
} while (0)
#ifdef HASH_BLOOM
#define HASH_BLOOM_BITLEN (1UL << HASH_BLOOM)
#define HASH_BLOOM_BYTELEN (HASH_BLOOM_BITLEN/8UL) + (((HASH_BLOOM_BITLEN%8UL)!=0UL) ? 1UL : 0UL)
#define HASH_BLOOM_MAKE(tbl,oomed) \
do { \
(tbl)->bloom_nbits = HASH_BLOOM; \
(tbl)->bloom_bv = (uint8_t*)uthash_malloc(HASH_BLOOM_BYTELEN); \
if (!(tbl)->bloom_bv) { \
HASH_RECORD_OOM(oomed); \
} else { \
uthash_bzero((tbl)->bloom_bv, HASH_BLOOM_BYTELEN); \
(tbl)->bloom_sig = HASH_BLOOM_SIGNATURE; \
} \
} while (0)
#define HASH_BLOOM_FREE(tbl) \
do { \
uthash_free((tbl)->bloom_bv, HASH_BLOOM_BYTELEN); \
} while (0)
#define HASH_BLOOM_BITSET(bv,idx) (bv[(idx)/8U] |= (1U << ((idx)%8U)))
#define HASH_BLOOM_BITTEST(bv,idx) (bv[(idx)/8U] & (1U << ((idx)%8U)))
#define HASH_BLOOM_ADD(tbl,hashv) \
HASH_BLOOM_BITSET((tbl)->bloom_bv, ((hashv) & (uint32_t)((1UL << (tbl)->bloom_nbits) - 1U)))
#define HASH_BLOOM_TEST(tbl,hashv) \
HASH_BLOOM_BITTEST((tbl)->bloom_bv, ((hashv) & (uint32_t)((1UL << (tbl)->bloom_nbits) - 1U)))
#else
#define HASH_BLOOM_MAKE(tbl,oomed)
#define HASH_BLOOM_FREE(tbl)
#define HASH_BLOOM_ADD(tbl,hashv)
#define HASH_BLOOM_TEST(tbl,hashv) (1)
#define HASH_BLOOM_BYTELEN 0U
#endif
#define HASH_MAKE_TABLE(hh,head,oomed) \
do { \
(head)->hh.tbl = (UT_hash_table*)uthash_malloc(sizeof(UT_hash_table)); \
if (!(head)->hh.tbl) { \
HASH_RECORD_OOM(oomed); \
} else { \
uthash_bzero((head)->hh.tbl, sizeof(UT_hash_table)); \
(head)->hh.tbl->tail = &((head)->hh); \
(head)->hh.tbl->num_buckets = HASH_INITIAL_NUM_BUCKETS; \
(head)->hh.tbl->log2_num_buckets = HASH_INITIAL_NUM_BUCKETS_LOG2; \
(head)->hh.tbl->hho = (char*)(&(head)->hh) - (char*)(head); \
(head)->hh.tbl->buckets = (UT_hash_bucket*)uthash_malloc( \
HASH_INITIAL_NUM_BUCKETS * sizeof(struct UT_hash_bucket)); \
(head)->hh.tbl->signature = HASH_SIGNATURE; \
if (!(head)->hh.tbl->buckets) { \
HASH_RECORD_OOM(oomed); \
uthash_free((head)->hh.tbl, sizeof(UT_hash_table)); \
} else { \
uthash_bzero((head)->hh.tbl->buckets, \
HASH_INITIAL_NUM_BUCKETS * sizeof(struct UT_hash_bucket)); \
HASH_BLOOM_MAKE((head)->hh.tbl, oomed); \
IF_HASH_NONFATAL_OOM( \
if (oomed) { \
uthash_free((head)->hh.tbl->buckets, \
HASH_INITIAL_NUM_BUCKETS*sizeof(struct UT_hash_bucket)); \
uthash_free((head)->hh.tbl, sizeof(UT_hash_table)); \
} \
) \
} \
} \
} while (0)
#define HASH_REPLACE_BYHASHVALUE_INORDER(hh,head,fieldname,keylen_in,hashval,add,replaced,cmpfcn) \
do { \
(replaced) = NULL; \
HASH_FIND_BYHASHVALUE(hh, head, &((add)->fieldname), keylen_in, hashval, replaced); \
if (replaced) { \
HASH_DELETE(hh, head, replaced); \
} \
HASH_ADD_KEYPTR_BYHASHVALUE_INORDER(hh, head, &((add)->fieldname), keylen_in, hashval, add, cmpfcn); \
} while (0)
#define HASH_REPLACE_BYHASHVALUE(hh,head,fieldname,keylen_in,hashval,add,replaced) \
do { \
(replaced) = NULL; \
HASH_FIND_BYHASHVALUE(hh, head, &((add)->fieldname), keylen_in, hashval, replaced); \
if (replaced) { \
HASH_DELETE(hh, head, replaced); \
} \
HASH_ADD_KEYPTR_BYHASHVALUE(hh, head, &((add)->fieldname), keylen_in, hashval, add); \
} while (0)
#define HASH_REPLACE(hh,head,fieldname,keylen_in,add,replaced) \
do { \
unsigned _hr_hashv; \
HASH_VALUE(&((add)->fieldname), keylen_in, _hr_hashv); \
HASH_REPLACE_BYHASHVALUE(hh, head, fieldname, keylen_in, _hr_hashv, add, replaced); \
} while (0)
#define HASH_REPLACE_INORDER(hh,head,fieldname,keylen_in,add,replaced,cmpfcn) \
do { \
unsigned _hr_hashv; \
HASH_VALUE(&((add)->fieldname), keylen_in, _hr_hashv); \
HASH_REPLACE_BYHASHVALUE_INORDER(hh, head, fieldname, keylen_in, _hr_hashv, add, replaced, cmpfcn); \
} while (0)
#define HASH_APPEND_LIST(hh, head, add) \
do { \
(add)->hh.next = NULL; \
(add)->hh.prev = ELMT_FROM_HH((head)->hh.tbl, (head)->hh.tbl->tail); \
(head)->hh.tbl->tail->next = (add); \
(head)->hh.tbl->tail = &((add)->hh); \
} while (0)
#define HASH_AKBI_INNER_LOOP(hh,head,add,cmpfcn) \
do { \
do { \
if (cmpfcn(DECLTYPE(head)(_hs_iter), add) > 0) { \
break; \
} \
} while ((_hs_iter = HH_FROM_ELMT((head)->hh.tbl, _hs_iter)->next)); \
} while (0)
#ifdef NO_DECLTYPE
#undef HASH_AKBI_INNER_LOOP
#define HASH_AKBI_INNER_LOOP(hh,head,add,cmpfcn) \
do { \
char *_hs_saved_head = (char*)(head); \
do { \
DECLTYPE_ASSIGN(head, _hs_iter); \
if (cmpfcn(head, add) > 0) { \
DECLTYPE_ASSIGN(head, _hs_saved_head); \
break; \
} \
DECLTYPE_ASSIGN(head, _hs_saved_head); \
} while ((_hs_iter = HH_FROM_ELMT((head)->hh.tbl, _hs_iter)->next)); \
} while (0)
#endif
#if HASH_NONFATAL_OOM
#define HASH_ADD_TO_TABLE(hh,head,keyptr,keylen_in,hashval,add,oomed) \
do { \
if (!(oomed)) { \
unsigned _ha_bkt; \
(head)->hh.tbl->num_items++; \
HASH_TO_BKT(hashval, (head)->hh.tbl->num_buckets, _ha_bkt); \
HASH_ADD_TO_BKT((head)->hh.tbl->buckets[_ha_bkt], hh, &(add)->hh, oomed); \
if (oomed) { \
HASH_ROLLBACK_BKT(hh, head, &(add)->hh); \
HASH_DELETE_HH(hh, head, &(add)->hh); \
(add)->hh.tbl = NULL; \
uthash_nonfatal_oom(add); \
} else { \
HASH_BLOOM_ADD((head)->hh.tbl, hashval); \
HASH_EMIT_KEY(hh, head, keyptr, keylen_in); \
} \
} else { \
(add)->hh.tbl = NULL; \
uthash_nonfatal_oom(add); \
} \
} while (0)
#else
#define HASH_ADD_TO_TABLE(hh,head,keyptr,keylen_in,hashval,add,oomed) \
do { \
unsigned _ha_bkt; \
(head)->hh.tbl->num_items++; \
HASH_TO_BKT(hashval, (head)->hh.tbl->num_buckets, _ha_bkt); \
HASH_ADD_TO_BKT((head)->hh.tbl->buckets[_ha_bkt], hh, &(add)->hh, oomed); \
HASH_BLOOM_ADD((head)->hh.tbl, hashval); \
HASH_EMIT_KEY(hh, head, keyptr, keylen_in); \
} while (0)
#endif
#define HASH_ADD_KEYPTR_BYHASHVALUE_INORDER(hh,head,keyptr,keylen_in,hashval,add,cmpfcn) \
do { \
IF_HASH_NONFATAL_OOM( int _ha_oomed = 0; ) \
(add)->hh.hashv = (hashval); \
(add)->hh.key = (char*) (keyptr); \
(add)->hh.keylen = (unsigned) (keylen_in); \
if (!(head)) { \
(add)->hh.next = NULL; \
(add)->hh.prev = NULL; \
HASH_MAKE_TABLE(hh, add, _ha_oomed); \
IF_HASH_NONFATAL_OOM( if (!_ha_oomed) { ) \
(head) = (add); \
IF_HASH_NONFATAL_OOM( } ) \
} else { \
void *_hs_iter = (head); \
(add)->hh.tbl = (head)->hh.tbl; \
HASH_AKBI_INNER_LOOP(hh, head, add, cmpfcn); \
if (_hs_iter) { \
(add)->hh.next = _hs_iter; \
if (((add)->hh.prev = HH_FROM_ELMT((head)->hh.tbl, _hs_iter)->prev)) { \
HH_FROM_ELMT((head)->hh.tbl, (add)->hh.prev)->next = (add); \
} else { \
(head) = (add); \
} \
HH_FROM_ELMT((head)->hh.tbl, _hs_iter)->prev = (add); \
} else { \
HASH_APPEND_LIST(hh, head, add); \
} \
} \
HASH_ADD_TO_TABLE(hh, head, keyptr, keylen_in, hashval, add, _ha_oomed); \
HASH_FSCK(hh, head, "HASH_ADD_KEYPTR_BYHASHVALUE_INORDER"); \
} while (0)
#define HASH_ADD_KEYPTR_INORDER(hh,head,keyptr,keylen_in,add,cmpfcn) \
do { \
unsigned _hs_hashv; \
HASH_VALUE(keyptr, keylen_in, _hs_hashv); \
HASH_ADD_KEYPTR_BYHASHVALUE_INORDER(hh, head, keyptr, keylen_in, _hs_hashv, add, cmpfcn); \
} while (0)
#define HASH_ADD_BYHASHVALUE_INORDER(hh,head,fieldname,keylen_in,hashval,add,cmpfcn) \
HASH_ADD_KEYPTR_BYHASHVALUE_INORDER(hh, head, &((add)->fieldname), keylen_in, hashval, add, cmpfcn)
#define HASH_ADD_INORDER(hh,head,fieldname,keylen_in,add,cmpfcn) \
HASH_ADD_KEYPTR_INORDER(hh, head, &((add)->fieldname), keylen_in, add, cmpfcn)
#define HASH_ADD_KEYPTR_BYHASHVALUE(hh,head,keyptr,keylen_in,hashval,add) \
do { \
IF_HASH_NONFATAL_OOM( int _ha_oomed = 0; ) \
(add)->hh.hashv = (hashval); \
(add)->hh.key = (char*) (keyptr); \
(add)->hh.keylen = (unsigned) (keylen_in); \
if (!(head)) { \
(add)->hh.next = NULL; \
(add)->hh.prev = NULL; \
HASH_MAKE_TABLE(hh, add, _ha_oomed); \
IF_HASH_NONFATAL_OOM( if (!_ha_oomed) { ) \
(head) = (add); \
IF_HASH_NONFATAL_OOM( } ) \
} else { \
(add)->hh.tbl = (head)->hh.tbl; \
HASH_APPEND_LIST(hh, head, add); \
} \
HASH_ADD_TO_TABLE(hh, head, keyptr, keylen_in, hashval, add, _ha_oomed); \
HASH_FSCK(hh, head, "HASH_ADD_KEYPTR_BYHASHVALUE"); \
} while (0)
#define HASH_ADD_KEYPTR(hh,head,keyptr,keylen_in,add) \
do { \
unsigned _ha_hashv; \
HASH_VALUE(keyptr, keylen_in, _ha_hashv); \
HASH_ADD_KEYPTR_BYHASHVALUE(hh, head, keyptr, keylen_in, _ha_hashv, add); \
} while (0)
#define HASH_ADD_BYHASHVALUE(hh,head,fieldname,keylen_in,hashval,add) \
HASH_ADD_KEYPTR_BYHASHVALUE(hh, head, &((add)->fieldname), keylen_in, hashval, add)
#define HASH_ADD(hh,head,fieldname,keylen_in,add) \
HASH_ADD_KEYPTR(hh, head, &((add)->fieldname), keylen_in, add)
#define HASH_TO_BKT(hashv,num_bkts,bkt) \
do { \
bkt = ((hashv) & ((num_bkts) - 1U)); \
} while (0)
/* delete "delptr" from the hash table.
* "the usual" patch-up process for the app-order doubly-linked-list.
* The use of _hd_hh_del below deserves special explanation.
* These used to be expressed using (delptr) but that led to a bug
* if someone used the same symbol for the head and deletee, like
* HASH_DELETE(hh,users,users);
* We want that to work, but by changing the head (users) below
* we were forfeiting our ability to further refer to the deletee (users)
* in the patch-up process. Solution: use scratch space to
* copy the deletee pointer, then the latter references are via that
* scratch pointer rather than through the repointed (users) symbol.
*/
#define HASH_DELETE(hh,head,delptr) \
HASH_DELETE_HH(hh, head, &(delptr)->hh)
#define HASH_DELETE_HH(hh,head,delptrhh) \
do { \
struct UT_hash_handle *_hd_hh_del = (delptrhh); \
if ((_hd_hh_del->prev == NULL) && (_hd_hh_del->next == NULL)) { \
HASH_BLOOM_FREE((head)->hh.tbl); \
uthash_free((head)->hh.tbl->buckets, \
(head)->hh.tbl->num_buckets * sizeof(struct UT_hash_bucket)); \
uthash_free((head)->hh.tbl, sizeof(UT_hash_table)); \
(head) = NULL; \
} else { \
unsigned _hd_bkt; \
if (_hd_hh_del == (head)->hh.tbl->tail) { \
(head)->hh.tbl->tail = HH_FROM_ELMT((head)->hh.tbl, _hd_hh_del->prev); \
} \
if (_hd_hh_del->prev != NULL) { \
HH_FROM_ELMT((head)->hh.tbl, _hd_hh_del->prev)->next = _hd_hh_del->next; \
} else { \
DECLTYPE_ASSIGN(head, _hd_hh_del->next); \
} \
if (_hd_hh_del->next != NULL) { \
HH_FROM_ELMT((head)->hh.tbl, _hd_hh_del->next)->prev = _hd_hh_del->prev; \
} \
HASH_TO_BKT(_hd_hh_del->hashv, (head)->hh.tbl->num_buckets, _hd_bkt); \
HASH_DEL_IN_BKT((head)->hh.tbl->buckets[_hd_bkt], _hd_hh_del); \
(head)->hh.tbl->num_items--; \
} \
HASH_FSCK(hh, head, "HASH_DELETE_HH"); \
} while (0)
/* convenience forms of HASH_FIND/HASH_ADD/HASH_DEL */
#define HASH_FIND_STR(head,findstr,out) \
HASH_FIND(hh,head,findstr,(unsigned)uthash_strlen(findstr),out)
#define HASH_ADD_STR(head,strfield,add) \
HASH_ADD(hh,head,strfield[0],(unsigned)uthash_strlen(add->strfield),add)
#define HASH_REPLACE_STR(head,strfield,add,replaced) \
HASH_REPLACE(hh,head,strfield[0],(unsigned)uthash_strlen(add->strfield),add,replaced)
#define HASH_FIND_INT(head,findint,out) \
HASH_FIND(hh,head,findint,sizeof(int),out)
#define HASH_ADD_INT(head,intfield,add) \
HASH_ADD(hh,head,intfield,sizeof(int),add)
#define HASH_REPLACE_INT(head,intfield,add,replaced) \
HASH_REPLACE(hh,head,intfield,sizeof(int),add,replaced)
#define HASH_FIND_PTR(head,findptr,out) \
HASH_FIND(hh,head,findptr,sizeof(void *),out)
#define HASH_ADD_PTR(head,ptrfield,add) \
HASH_ADD(hh,head,ptrfield,sizeof(void *),add)
#define HASH_REPLACE_PTR(head,ptrfield,add,replaced) \
HASH_REPLACE(hh,head,ptrfield,sizeof(void *),add,replaced)
#define HASH_DEL(head,delptr) \
HASH_DELETE(hh,head,delptr)
/* HASH_FSCK checks hash integrity on every add/delete when HASH_DEBUG is defined.
* This is for uthash developer only; it compiles away if HASH_DEBUG isn't defined.
*/
#ifdef HASH_DEBUG
#define HASH_OOPS(...) do { fprintf(stderr,__VA_ARGS__); exit(-1); } while (0)
#define HASH_FSCK(hh,head,where) \
do { \
struct UT_hash_handle *_thh; \
if (head) { \
unsigned _bkt_i; \
unsigned _count = 0; \
char *_prev; \
for (_bkt_i = 0; _bkt_i < (head)->hh.tbl->num_buckets; ++_bkt_i) { \
unsigned _bkt_count = 0; \
_thh = (head)->hh.tbl->buckets[_bkt_i].hh_head; \
_prev = NULL; \
while (_thh) { \
if (_prev != (char*)(_thh->hh_prev)) { \
HASH_OOPS("%s: invalid hh_prev %p, actual %p\n", \
(where), (void*)_thh->hh_prev, (void*)_prev); \
} \
_bkt_count++; \
_prev = (char*)(_thh); \
_thh = _thh->hh_next; \
} \
_count += _bkt_count; \
if ((head)->hh.tbl->buckets[_bkt_i].count != _bkt_count) { \
HASH_OOPS("%s: invalid bucket count %u, actual %u\n", \
(where), (head)->hh.tbl->buckets[_bkt_i].count, _bkt_count); \
} \
} \
if (_count != (head)->hh.tbl->num_items) { \
HASH_OOPS("%s: invalid hh item count %u, actual %u\n", \
(where), (head)->hh.tbl->num_items, _count); \
} \
_count = 0; \
_prev = NULL; \
_thh = &(head)->hh; \
while (_thh) { \
_count++; \
if (_prev != (char*)_thh->prev) { \
HASH_OOPS("%s: invalid prev %p, actual %p\n", \
(where), (void*)_thh->prev, (void*)_prev); \
} \
_prev = (char*)ELMT_FROM_HH((head)->hh.tbl, _thh); \
_thh = (_thh->next ? HH_FROM_ELMT((head)->hh.tbl, _thh->next) : NULL); \
} \
if (_count != (head)->hh.tbl->num_items) { \
HASH_OOPS("%s: invalid app item count %u, actual %u\n", \
(where), (head)->hh.tbl->num_items, _count); \
} \
} \
} while (0)
#else
#define HASH_FSCK(hh,head,where)
#endif
/* When compiled with -DHASH_EMIT_KEYS, length-prefixed keys are emitted to
* the descriptor to which this macro is defined for tuning the hash function.
* The app can #include <unistd.h> to get the prototype for write(2). */
#ifdef HASH_EMIT_KEYS
#define HASH_EMIT_KEY(hh,head,keyptr,fieldlen) \
do { \
unsigned _klen = fieldlen; \
write(HASH_EMIT_KEYS, &_klen, sizeof(_klen)); \
write(HASH_EMIT_KEYS, keyptr, (unsigned long)fieldlen); \
} while (0)
#else
#define HASH_EMIT_KEY(hh,head,keyptr,fieldlen)
#endif
/* default to Jenkin's hash unless overridden e.g. DHASH_FUNCTION=HASH_SAX */
#ifdef HASH_FUNCTION
#define HASH_FCN HASH_FUNCTION
#else
#define HASH_FCN HASH_JEN
#endif
/* The Bernstein hash function, used in Perl prior to v5.6. Note (x<<5+x)=x*33. */
#define HASH_BER(key,keylen,hashv) \
do { \
unsigned _hb_keylen = (unsigned)keylen; \
const unsigned char *_hb_key = (const unsigned char*)(key); \
(hashv) = 0; \
while (_hb_keylen-- != 0U) { \
(hashv) = (((hashv) << 5) + (hashv)) + *_hb_key++; \
} \
} while (0)
/* SAX/FNV/OAT/JEN hash functions are macro variants of those listed at
* http://eternallyconfuzzled.com/tuts/algorithms/jsw_tut_hashing.aspx */
#define HASH_SAX(key,keylen,hashv) \
do { \
unsigned _sx_i; \
const unsigned char *_hs_key = (const unsigned char*)(key); \
hashv = 0; \
for (_sx_i=0; _sx_i < keylen; _sx_i++) { \
hashv ^= (hashv << 5) + (hashv >> 2) + _hs_key[_sx_i]; \
} \
} while (0)
/* FNV-1a variation */
#define HASH_FNV(key,keylen,hashv) \
do { \
unsigned _fn_i; \
const unsigned char *_hf_key = (const unsigned char*)(key); \
(hashv) = 2166136261U; \
for (_fn_i=0; _fn_i < keylen; _fn_i++) { \
hashv = hashv ^ _hf_key[_fn_i]; \
hashv = hashv * 16777619U; \
} \
} while (0)
#define HASH_OAT(key,keylen,hashv) \
do { \
unsigned _ho_i; \
const unsigned char *_ho_key=(const unsigned char*)(key); \
hashv = 0; \
for(_ho_i=0; _ho_i < keylen; _ho_i++) { \
hashv += _ho_key[_ho_i]; \
hashv += (hashv << 10); \
hashv ^= (hashv >> 6); \
} \
hashv += (hashv << 3); \
hashv ^= (hashv >> 11); \
hashv += (hashv << 15); \
} while (0)
#define HASH_JEN_MIX(a,b,c) \
do { \
a -= b; a -= c; a ^= ( c >> 13 ); \
b -= c; b -= a; b ^= ( a << 8 ); \
c -= a; c -= b; c ^= ( b >> 13 ); \
a -= b; a -= c; a ^= ( c >> 12 ); \
b -= c; b -= a; b ^= ( a << 16 ); \
c -= a; c -= b; c ^= ( b >> 5 ); \
a -= b; a -= c; a ^= ( c >> 3 ); \
b -= c; b -= a; b ^= ( a << 10 ); \
c -= a; c -= b; c ^= ( b >> 15 ); \
} while (0)
#define HASH_JEN(key,keylen,hashv) \
do { \
unsigned _hj_i,_hj_j,_hj_k; \
unsigned const char *_hj_key=(unsigned const char*)(key); \
hashv = 0xfeedbeefu; \
_hj_i = _hj_j = 0x9e3779b9u; \
_hj_k = (unsigned)(keylen); \
while (_hj_k >= 12U) { \
_hj_i += (_hj_key[0] + ( (unsigned)_hj_key[1] << 8 ) \
+ ( (unsigned)_hj_key[2] << 16 ) \
+ ( (unsigned)_hj_key[3] << 24 ) ); \
_hj_j += (_hj_key[4] + ( (unsigned)_hj_key[5] << 8 ) \
+ ( (unsigned)_hj_key[6] << 16 ) \
+ ( (unsigned)_hj_key[7] << 24 ) ); \
hashv += (_hj_key[8] + ( (unsigned)_hj_key[9] << 8 ) \
+ ( (unsigned)_hj_key[10] << 16 ) \
+ ( (unsigned)_hj_key[11] << 24 ) ); \
\
HASH_JEN_MIX(_hj_i, _hj_j, hashv); \
\
_hj_key += 12; \
_hj_k -= 12U; \
} \
hashv += (unsigned)(keylen); \
switch ( _hj_k ) { \
case 11: hashv += ( (unsigned)_hj_key[10] << 24 ); /* FALLTHROUGH */ \
case 10: hashv += ( (unsigned)_hj_key[9] << 16 ); /* FALLTHROUGH */ \
case 9: hashv += ( (unsigned)_hj_key[8] << 8 ); /* FALLTHROUGH */ \
case 8: _hj_j += ( (unsigned)_hj_key[7] << 24 ); /* FALLTHROUGH */ \
case 7: _hj_j += ( (unsigned)_hj_key[6] << 16 ); /* FALLTHROUGH */ \
case 6: _hj_j += ( (unsigned)_hj_key[5] << 8 ); /* FALLTHROUGH */ \
case 5: _hj_j += _hj_key[4]; /* FALLTHROUGH */ \
case 4: _hj_i += ( (unsigned)_hj_key[3] << 24 ); /* FALLTHROUGH */ \
case 3: _hj_i += ( (unsigned)_hj_key[2] << 16 ); /* FALLTHROUGH */ \
case 2: _hj_i += ( (unsigned)_hj_key[1] << 8 ); /* FALLTHROUGH */ \
case 1: _hj_i += _hj_key[0]; /* FALLTHROUGH */ \
default: /* make gcc -Wswitch-default happy */ \
; \
} \
HASH_JEN_MIX(_hj_i, _hj_j, hashv); \
} while (0)
/* The Paul Hsieh hash function */
#undef get16bits
#if (defined(__GNUC__) && defined(__i386__)) || defined(__WATCOMC__) \
|| defined(_MSC_VER) || defined (__BORLANDC__) || defined (__TURBOC__)
#define get16bits(d) (*((const uint16_t *) (d)))
#endif
#if !defined (get16bits)
#define get16bits(d) ((((uint32_t)(((const uint8_t *)(d))[1])) << 8) \
+(uint32_t)(((const uint8_t *)(d))[0]) )
#endif
#define HASH_SFH(key,keylen,hashv) \
do { \
unsigned const char *_sfh_key=(unsigned const char*)(key); \
uint32_t _sfh_tmp, _sfh_len = (uint32_t)keylen; \
\
unsigned _sfh_rem = _sfh_len & 3U; \
_sfh_len >>= 2; \
hashv = 0xcafebabeu; \
\
/* Main loop */ \
for (;_sfh_len > 0U; _sfh_len--) { \
hashv += get16bits (_sfh_key); \
_sfh_tmp = ((uint32_t)(get16bits (_sfh_key+2)) << 11) ^ hashv; \
hashv = (hashv << 16) ^ _sfh_tmp; \
_sfh_key += 2U*sizeof (uint16_t); \
hashv += hashv >> 11; \
} \
\
/* Handle end cases */ \
switch (_sfh_rem) { \
case 3: hashv += get16bits (_sfh_key); \
hashv ^= hashv << 16; \
hashv ^= (uint32_t)(_sfh_key[sizeof (uint16_t)]) << 18; \
hashv += hashv >> 11; \
break; \
case 2: hashv += get16bits (_sfh_key); \
hashv ^= hashv << 11; \
hashv += hashv >> 17; \
break; \
case 1: hashv += *_sfh_key; \
hashv ^= hashv << 10; \
hashv += hashv >> 1; \
} \
\
/* Force "avalanching" of final 127 bits */ \
hashv ^= hashv << 3; \
hashv += hashv >> 5; \
hashv ^= hashv << 4; \
hashv += hashv >> 17; \
hashv ^= hashv << 25; \
hashv += hashv >> 6; \
} while (0)
#ifdef HASH_USING_NO_STRICT_ALIASING
/* The MurmurHash exploits some CPU's (x86,x86_64) tolerance for unaligned reads.
* For other types of CPU's (e.g. Sparc) an unaligned read causes a bus error.
* MurmurHash uses the faster approach only on CPU's where we know it's safe.
*
* Note the preprocessor built-in defines can be emitted using:
*
* gcc -m64 -dM -E - < /dev/null (on gcc)
* cc -## a.c (where a.c is a simple test file) (Sun Studio)
*/
#if (defined(__i386__) || defined(__x86_64__) || defined(_M_IX86))
#define MUR_GETBLOCK(p,i) p[i]
#else /* non intel */
#define MUR_PLUS0_ALIGNED(p) (((unsigned long)p & 3UL) == 0UL)
#define MUR_PLUS1_ALIGNED(p) (((unsigned long)p & 3UL) == 1UL)
#define MUR_PLUS2_ALIGNED(p) (((unsigned long)p & 3UL) == 2UL)
#define MUR_PLUS3_ALIGNED(p) (((unsigned long)p & 3UL) == 3UL)
#define WP(p) ((uint32_t*)((unsigned long)(p) & ~3UL))
#if (defined(__BIG_ENDIAN__) || defined(SPARC) || defined(__ppc__) || defined(__ppc64__))
#define MUR_THREE_ONE(p) ((((*WP(p))&0x00ffffff) << 8) | (((*(WP(p)+1))&0xff000000) >> 24))
#define MUR_TWO_TWO(p) ((((*WP(p))&0x0000ffff) <<16) | (((*(WP(p)+1))&0xffff0000) >> 16))
#define MUR_ONE_THREE(p) ((((*WP(p))&0x000000ff) <<24) | (((*(WP(p)+1))&0xffffff00) >> 8))
#else /* assume little endian non-intel */
#define MUR_THREE_ONE(p) ((((*WP(p))&0xffffff00) >> 8) | (((*(WP(p)+1))&0x000000ff) << 24))
#define MUR_TWO_TWO(p) ((((*WP(p))&0xffff0000) >>16) | (((*(WP(p)+1))&0x0000ffff) << 16))
#define MUR_ONE_THREE(p) ((((*WP(p))&0xff000000) >>24) | (((*(WP(p)+1))&0x00ffffff) << 8))
#endif
#define MUR_GETBLOCK(p,i) (MUR_PLUS0_ALIGNED(p) ? ((p)[i]) : \
(MUR_PLUS1_ALIGNED(p) ? MUR_THREE_ONE(p) : \
(MUR_PLUS2_ALIGNED(p) ? MUR_TWO_TWO(p) : \
MUR_ONE_THREE(p))))
#endif
#define MUR_ROTL32(x,r) (((x) << (r)) | ((x) >> (32 - (r))))
#define MUR_FMIX(_h) \
do { \
_h ^= _h >> 16; \
_h *= 0x85ebca6bu; \
_h ^= _h >> 13; \
_h *= 0xc2b2ae35u; \
_h ^= _h >> 16; \
} while (0)
#define HASH_MUR(key,keylen,hashv) \
do { \
const uint8_t *_mur_data = (const uint8_t*)(key); \
const int _mur_nblocks = (int)(keylen) / 4; \
uint32_t _mur_h1 = 0xf88D5353u; \
uint32_t _mur_c1 = 0xcc9e2d51u; \
uint32_t _mur_c2 = 0x1b873593u; \
uint32_t _mur_k1 = 0; \
const uint8_t *_mur_tail; \
const uint32_t *_mur_blocks = (const uint32_t*)(_mur_data+(_mur_nblocks*4)); \
int _mur_i; \
for (_mur_i = -_mur_nblocks; _mur_i != 0; _mur_i++) { \
_mur_k1 = MUR_GETBLOCK(_mur_blocks,_mur_i); \
_mur_k1 *= _mur_c1; \
_mur_k1 = MUR_ROTL32(_mur_k1,15); \
_mur_k1 *= _mur_c2; \
\
_mur_h1 ^= _mur_k1; \
_mur_h1 = MUR_ROTL32(_mur_h1,13); \
_mur_h1 = (_mur_h1*5U) + 0xe6546b64u; \
} \
_mur_tail = (const uint8_t*)(_mur_data + (_mur_nblocks*4)); \
_mur_k1=0; \
switch ((keylen) & 3U) { \
case 0: break; \
case 3: _mur_k1 ^= (uint32_t)_mur_tail[2] << 16; /* FALLTHROUGH */ \
case 2: _mur_k1 ^= (uint32_t)_mur_tail[1] << 8; /* FALLTHROUGH */ \
case 1: _mur_k1 ^= (uint32_t)_mur_tail[0]; \
_mur_k1 *= _mur_c1; \
_mur_k1 = MUR_ROTL32(_mur_k1,15); \
_mur_k1 *= _mur_c2; \
_mur_h1 ^= _mur_k1; \
} \
_mur_h1 ^= (uint32_t)(keylen); \
MUR_FMIX(_mur_h1); \
hashv = _mur_h1; \
} while (0)
#endif /* HASH_USING_NO_STRICT_ALIASING */
/* iterate over items in a known bucket to find desired item */
#define HASH_FIND_IN_BKT(tbl,hh,head,keyptr,keylen_in,hashval,out) \
do { \
if ((head).hh_head != NULL) { \
DECLTYPE_ASSIGN(out, ELMT_FROM_HH(tbl, (head).hh_head)); \
} else { \
(out) = NULL; \
} \
while ((out) != NULL) { \
if ((out)->hh.hashv == (hashval) && (out)->hh.keylen == (keylen_in)) { \
if (uthash_memcmp((out)->hh.key, keyptr, keylen_in) == 0) { \
break; \
} \
} \
if ((out)->hh.hh_next != NULL) { \
DECLTYPE_ASSIGN(out, ELMT_FROM_HH(tbl, (out)->hh.hh_next)); \
} else { \
(out) = NULL; \
} \
} \
} while (0)
/* add an item to a bucket */
#define HASH_ADD_TO_BKT(head,hh,addhh,oomed) \
do { \
UT_hash_bucket *_ha_head = &(head); \
_ha_head->count++; \
(addhh)->hh_next = _ha_head->hh_head; \
(addhh)->hh_prev = NULL; \
if (_ha_head->hh_head != NULL) { \
_ha_head->hh_head->hh_prev = (addhh); \
} \
_ha_head->hh_head = (addhh); \
if ((_ha_head->count >= ((_ha_head->expand_mult + 1U) * HASH_BKT_CAPACITY_THRESH)) \
&& !(addhh)->tbl->noexpand) { \
HASH_EXPAND_BUCKETS(addhh,(addhh)->tbl, oomed); \
IF_HASH_NONFATAL_OOM( \
if (oomed) { \
HASH_DEL_IN_BKT(head,addhh); \
} \
) \
} \
} while (0)
/* remove an item from a given bucket */
#define HASH_DEL_IN_BKT(head,delhh) \
do { \
UT_hash_bucket *_hd_head = &(head); \
_hd_head->count--; \
if (_hd_head->hh_head == (delhh)) { \
_hd_head->hh_head = (delhh)->hh_next; \
} \
if ((delhh)->hh_prev) { \
(delhh)->hh_prev->hh_next = (delhh)->hh_next; \
} \
if ((delhh)->hh_next) { \
(delhh)->hh_next->hh_prev = (delhh)->hh_prev; \
} \
} while (0)
/* Bucket expansion has the effect of doubling the number of buckets
* and redistributing the items into the new buckets. Ideally the
* items will distribute more or less evenly into the new buckets
* (the extent to which this is true is a measure of the quality of
* the hash function as it applies to the key domain).
*
* With the items distributed into more buckets, the chain length
* (item count) in each bucket is reduced. Thus by expanding buckets
* the hash keeps a bound on the chain length. This bounded chain
* length is the essence of how a hash provides constant time lookup.
*
* The calculation of tbl->ideal_chain_maxlen below deserves some
* explanation. First, keep in mind that we're calculating the ideal
* maximum chain length based on the *new* (doubled) bucket count.
* In fractions this is just n/b (n=number of items,b=new num buckets).
* Since the ideal chain length is an integer, we want to calculate
* ceil(n/b). We don't depend on floating point arithmetic in this
* hash, so to calculate ceil(n/b) with integers we could write
*
* ceil(n/b) = (n/b) + ((n%b)?1:0)
*
* and in fact a previous version of this hash did just that.
* But now we have improved things a bit by recognizing that b is
* always a power of two. We keep its base 2 log handy (call it lb),
* so now we can write this with a bit shift and logical AND:
*
* ceil(n/b) = (n>>lb) + ( (n & (b-1)) ? 1:0)
*
*/
#define HASH_EXPAND_BUCKETS(hh,tbl,oomed) \
do { \
unsigned _he_bkt; \
unsigned _he_bkt_i; \
struct UT_hash_handle *_he_thh, *_he_hh_nxt; \
UT_hash_bucket *_he_new_buckets, *_he_newbkt; \
_he_new_buckets = (UT_hash_bucket*)uthash_malloc( \
2UL * (tbl)->num_buckets * sizeof(struct UT_hash_bucket)); \
if (!_he_new_buckets) { \
HASH_RECORD_OOM(oomed); \
} else { \
uthash_bzero(_he_new_buckets, \
2UL * (tbl)->num_buckets * sizeof(struct UT_hash_bucket)); \
(tbl)->ideal_chain_maxlen = \
((tbl)->num_items >> ((tbl)->log2_num_buckets+1U)) + \
((((tbl)->num_items & (((tbl)->num_buckets*2U)-1U)) != 0U) ? 1U : 0U); \
(tbl)->nonideal_items = 0; \
for (_he_bkt_i = 0; _he_bkt_i < (tbl)->num_buckets; _he_bkt_i++) { \
_he_thh = (tbl)->buckets[ _he_bkt_i ].hh_head; \
while (_he_thh != NULL) { \
_he_hh_nxt = _he_thh->hh_next; \
HASH_TO_BKT(_he_thh->hashv, (tbl)->num_buckets * 2U, _he_bkt); \
_he_newbkt = &(_he_new_buckets[_he_bkt]); \
if (++(_he_newbkt->count) > (tbl)->ideal_chain_maxlen) { \
(tbl)->nonideal_items++; \
_he_newbkt->expand_mult = _he_newbkt->count / (tbl)->ideal_chain_maxlen; \
} \
_he_thh->hh_prev = NULL; \
_he_thh->hh_next = _he_newbkt->hh_head; \
if (_he_newbkt->hh_head != NULL) { \
_he_newbkt->hh_head->hh_prev = _he_thh; \
} \
_he_newbkt->hh_head = _he_thh; \
_he_thh = _he_hh_nxt; \
} \
} \
uthash_free((tbl)->buckets, (tbl)->num_buckets * sizeof(struct UT_hash_bucket)); \
(tbl)->num_buckets *= 2U; \
(tbl)->log2_num_buckets++; \
(tbl)->buckets = _he_new_buckets; \
(tbl)->ineff_expands = ((tbl)->nonideal_items > ((tbl)->num_items >> 1)) ? \
((tbl)->ineff_expands+1U) : 0U; \
if ((tbl)->ineff_expands > 1U) { \
(tbl)->noexpand = 1; \
uthash_noexpand_fyi(tbl); \
} \
uthash_expand_fyi(tbl); \
} \
} while (0)
/* This is an adaptation of Simon Tatham's O(n log(n)) mergesort */
/* Note that HASH_SORT assumes the hash handle name to be hh.
* HASH_SRT was added to allow the hash handle name to be passed in. */
#define HASH_SORT(head,cmpfcn) HASH_SRT(hh,head,cmpfcn)
#define HASH_SRT(hh,head,cmpfcn) \
do { \
unsigned _hs_i; \
unsigned _hs_looping,_hs_nmerges,_hs_insize,_hs_psize,_hs_qsize; \
struct UT_hash_handle *_hs_p, *_hs_q, *_hs_e, *_hs_list, *_hs_tail; \
if (head != NULL) { \
_hs_insize = 1; \
_hs_looping = 1; \
_hs_list = &((head)->hh); \
while (_hs_looping != 0U) { \
_hs_p = _hs_list; \
_hs_list = NULL; \
_hs_tail = NULL; \
_hs_nmerges = 0; \
while (_hs_p != NULL) { \
_hs_nmerges++; \
_hs_q = _hs_p; \
_hs_psize = 0; \
for (_hs_i = 0; _hs_i < _hs_insize; ++_hs_i) { \
_hs_psize++; \
_hs_q = ((_hs_q->next != NULL) ? \
HH_FROM_ELMT((head)->hh.tbl, _hs_q->next) : NULL); \
if (_hs_q == NULL) { \
break; \
} \
} \
_hs_qsize = _hs_insize; \
while ((_hs_psize != 0U) || ((_hs_qsize != 0U) && (_hs_q != NULL))) { \
if (_hs_psize == 0U) { \
_hs_e = _hs_q; \
_hs_q = ((_hs_q->next != NULL) ? \
HH_FROM_ELMT((head)->hh.tbl, _hs_q->next) : NULL); \
_hs_qsize--; \
} else if ((_hs_qsize == 0U) || (_hs_q == NULL)) { \
_hs_e = _hs_p; \
if (_hs_p != NULL) { \
_hs_p = ((_hs_p->next != NULL) ? \
HH_FROM_ELMT((head)->hh.tbl, _hs_p->next) : NULL); \