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php3_hash.c
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/*
+----------------------------------------------------------------------+
| PHP HTML Embedded Scripting Language Version 3.0 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2000 PHP Development Team (See Credits file) |
+----------------------------------------------------------------------+
| This program is free software; you can redistribute it and/or modify |
| it under the terms of one of the following licenses: |
| |
| A) the GNU General Public License as published by the Free Software |
| Foundation; either version 2 of the License, or (at your option) |
| any later version. |
| |
| B) the PHP License as published by the PHP Development Team and |
| included in the distribution in the file: LICENSE |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of both licenses referred to here. |
| If you did not, or have any questions about PHP licensing, please |
| contact core@php.net. |
+----------------------------------------------------------------------+
| Authors: Andi Gutmans <andi@zend.com> |
| Zeev Suraski <zeev@zend.com> |
+----------------------------------------------------------------------+
*/
/* $Id: php3_hash.c,v 1.14 2000/04/10 19:29:36 andi Exp $ */
#include "php.h"
#include <stdio.h>
#if HAVE_STRING_H
#include <string.h>
#else
#include <strings.h>
#endif
#define HANDLE_NUMERIC(key,length,func) { \
register char *tmp=key; \
\
if ((*tmp>='0' && *tmp<='9')) do { /* possibly a numeric index */ \
char *end=tmp+length-1; \
ulong idx; \
\
if (*tmp++=='0' && length>2) { /* don't accept numbers with leading zeros */ \
break; \
} \
while (tmp<end) { \
if (!(*tmp>='0' && *tmp<='9')) { \
break; \
} \
tmp++; \
} \
if (tmp==end && *tmp=='\0') { /* a numeric index */ \
idx = strtol(key,NULL,10); \
if (idx!=LONG_MAX) { \
return func; \
} \
} \
} while(0); \
}
/* Generated on an Octa-ALPHA 300MHz CPU & 2.5GB RAM monster */
uint PrimeNumbers[] =
{5, 11, 19, 53, 107, 223, 463, 983, 1979, 3907, 7963, 16229, 32531, 65407, 130987, 262237, 524521, 1048793, 2097397, 4194103, 8388857, 16777447, 33554201, 67108961, 134217487, 268435697, 536870683, 1073741621, 2147483399};
uint nNumPrimeNumbers = sizeof(PrimeNumbers) / sizeof(ulong);
#if DEBUG
static void _php3_hash_indestroy(HashTable *ht,char *function, int line)
{
TLS_VARS;
if (ht->indestroy) {
php3_error(E_WARNING, "ht=%08x is already destroyed/destroying in %s at line %d",ht,function,line);
}
}
#define CHECK_INDESTROY(a) _php3_hash_indestroy(a,__FILE__,__LINE__);
#else
#define CHECK_INDESTROY(a)
#endif
static ulong hashpjw(char *arKey, uint nKeyLength)
{
ulong h = 0, g;
char *arEnd=arKey+nKeyLength;
while (arKey < arEnd) {
h = (h << 4) + *arKey++;
if ((g = (h & 0xF0000000))) {
h = h ^ (g >> 24);
h = h ^ g;
}
}
return h;
}
PHPAPI int _php3_hash_init(HashTable *ht, uint nSize, ulong(*pHashFunction) (char *arKey, uint nKeyLength), void (*pDestructor) (void *pData),int persistent)
{
uint i;
for (i = 0; i < nNumPrimeNumbers; i++) {
if (nSize <= PrimeNumbers[i]) {
nSize = PrimeNumbers[i];
ht->nHashSizeIndex = i;
break;
}
}
if (i == nNumPrimeNumbers) { /* This shouldn't really happen unless the ask for a ridiculous size */
nSize = PrimeNumbers[i - 1];
ht->nHashSizeIndex = i - 1;
}
/* Uses ecalloc() so that Bucket* == NULL */
ht->arBuckets = (Bucket **) pecalloc(nSize, sizeof(Bucket *), persistent);
if (!ht->arBuckets) {
return FAILURE;
}
if (pHashFunction == NULL) {
ht->pHashFunction = hashpjw;
} else {
ht->pHashFunction = pHashFunction;
}
ht->pDestructor = pDestructor;
ht->nTableSize = nSize;
ht->pListHead = NULL;
ht->pListTail = NULL;
ht->nNumOfElements = 0;
ht->nNextFreeElement = 0;
ht->pInternalPointer = NULL;
ht->persistent = persistent;
#if DEBUG
ht->indestroy = 0;
#endif
return SUCCESS;
}
PHPAPI int _php3_hash_add_or_update(HashTable *ht, char *arKey, uint nKeyLength, void *pData, uint nDataSize, void **pDest, int flag)
{
ulong h;
uint nIndex;
Bucket *p;
#if DEBUG
TLS_VARS;
#endif
CHECK_INDESTROY(ht);
if (nKeyLength <= 0) {
#if DEBUG
PUTS("_php3_hash_update: Can't put in empty key\n");
#endif
return FAILURE;
}
HANDLE_NUMERIC(arKey,nKeyLength,_php3_hash_index_update_or_next_insert(ht,idx,pData,nDataSize,pDest,flag));
h = ht->pHashFunction(arKey, nKeyLength);
nIndex = h % ht->nTableSize;
p = ht->arBuckets[nIndex];
while (p != NULL) {
if ((p->arKey != NULL) && (p->h == h) && (p->nKeyLength == nKeyLength)) {
if (!memcmp(p->arKey, arKey, nKeyLength)) {
if (flag == HASH_ADD) {
return FAILURE;
}
BLOCK_INTERRUPTIONS;
#if DEBUG
if (p->pData == pData) {
PUTS("Fatal error in _php3_hash_update: p->pData == pData\n");
UNBLOCK_INTERRUPTIONS;
return FAILURE;
}
#endif
if (ht->pDestructor) {
ht->pDestructor(p->pData);
}
memcpy(p->pData, pData, nDataSize);
if (pDest) {
*pDest = p->pData;
}
UNBLOCK_INTERRUPTIONS;
return SUCCESS;
}
}
p = p->pNext;
}
p = (Bucket *) pemalloc(sizeof(Bucket),ht->persistent);
if (!p) {
return FAILURE;
}
p->arKey = (char *) pemalloc(nKeyLength,ht->persistent);
if (!p->arKey) {
pefree(p,ht->persistent);
return FAILURE;
}
p->pData = (void *) pemalloc(nDataSize,ht->persistent);
if (!p->pData) {
pefree(p,ht->persistent);
pefree(p->arKey,ht->persistent);
return FAILURE;
}
p->nKeyLength = nKeyLength;
p->h = h;
memcpy(p->arKey, arKey, nKeyLength);
memcpy(p->pData, pData, nDataSize);
p->bIsPointer = 0;
p->pNext = ht->arBuckets[nIndex];
if (pDest) {
*pDest = p->pData;
}
BLOCK_INTERRUPTIONS;
if (ht->pInternalPointer == NULL) {
ht->pInternalPointer = p;
}
ht->arBuckets[nIndex] = p;
/* Setup the double linked list */
p->pListLast = ht->pListTail;
ht->pListTail = p;
p->pListNext = NULL;
if (p->pListLast != NULL) {
p->pListLast->pListNext = p;
}
if (!ht->pListHead) {
ht->pListHead = p;
}
UNBLOCK_INTERRUPTIONS;
ht->nNumOfElements++;
if_full_do_resize(ht); /* If the Hash table is full, resize it */
return SUCCESS;
}
PHPAPI int _php3_hash_index_update_or_next_insert(HashTable *ht, ulong h, void *pData, uint nDataSize, void **pDest, int flag)
{
uint nIndex;
Bucket *p;
#if DEBUG
TLS_VARS;
#endif
CHECK_INDESTROY(ht);
if (flag == HASH_NEXT_INSERT) {
h = ht->nNextFreeElement;
}
nIndex = h % ht->nTableSize;
p = ht->arBuckets[nIndex];
while (p != NULL) {
if ((p->arKey == NULL) && (p->h == h)) {
if (flag == HASH_NEXT_INSERT || flag == HASH_ADD) {
return FAILURE;
}
BLOCK_INTERRUPTIONS;
#if DEBUG
if (p->pData == pData) {
PUTS("Fatal error in _php3_hash_index_update: p->pData == pData\n");
UNBLOCK_INTERRUPTIONS;
return FAILURE;
}
#endif
if (ht->pDestructor) {
ht->pDestructor(p->pData);
}
memcpy(p->pData, pData, nDataSize);
UNBLOCK_INTERRUPTIONS;
if (h >= ht->nNextFreeElement) {
ht->nNextFreeElement = h + 1;
}
if (pDest) {
*pDest = p->pData;
}
return SUCCESS;
}
p = p->pNext;
}
p = (Bucket *) pemalloc(sizeof(Bucket),ht->persistent);
if (!p) {
return FAILURE;
}
p->arKey = NULL; /* Numeric indices are marked by making the arKey == NULL */
p->nKeyLength = 0;
p->h = h;
p->pData = (void *) pemalloc(nDataSize,ht->persistent);
if (!p->pData) {
pefree(p,ht->persistent);
return FAILURE;
}
memcpy(p->pData, pData, nDataSize);
p->bIsPointer = 0;
if (pDest) {
*pDest = p->pData;
}
p->pNext = ht->arBuckets[nIndex];
BLOCK_INTERRUPTIONS;
if (ht->pInternalPointer == NULL) {
ht->pInternalPointer = p;
}
ht->arBuckets[nIndex] = p;
/* Setup the double linked list */
p->pListLast = ht->pListTail;
ht->pListTail = p;
p->pListNext = NULL;
if (p->pListLast != NULL) {
p->pListLast->pListNext = p;
}
if (!ht->pListHead) {
ht->pListHead = p;
}
UNBLOCK_INTERRUPTIONS;
if (h >= ht->nNextFreeElement) {
ht->nNextFreeElement = h + 1;
}
ht->nNumOfElements++;
if_full_do_resize(ht);
return SUCCESS;
}
PHPAPI int _php3_hash_pointer_update(HashTable *ht, char *arKey, uint nKeyLength, void *pData)
{
ulong h;
uint nIndex;
Bucket *p;
#if DEBUG
TLS_VARS;
#endif
CHECK_INDESTROY(ht);
if (nKeyLength <= 0) {
#if DEBUG
PUTS("_php3_hash_update: Can't put in empty key\n");
#endif
return FAILURE;
}
HANDLE_NUMERIC(arKey,nKeyLength,_php3_hash_pointer_index_update_or_next_insert(ht,idx,pData,HASH_UPDATE));
h = ht->pHashFunction(arKey, nKeyLength);
nIndex = h % ht->nTableSize;
p = ht->arBuckets[nIndex];
while (p != NULL) {
if ((p->arKey != NULL) && (p->h == h) && (p->nKeyLength == nKeyLength)) {
if (!memcmp(p->arKey, arKey, nKeyLength)) {
#if DEBUG
if (p->pData == pData) {
PUTS("Fatal error in _php3_hash_pointer_update: p->pData == pData\n");
return FAILURE;
}
#endif
BLOCK_INTERRUPTIONS;
if (!p->bIsPointer && ht->pDestructor) {
ht->pDestructor(p->pData);
pefree(p->pData,ht->persistent);
}
p->pData = pData;
p->bIsPointer = 1;
UNBLOCK_INTERRUPTIONS;
return SUCCESS;
}
}
p = p->pNext;
}
p = (Bucket *) pemalloc(sizeof(Bucket),ht->persistent);
if (!p) {
return FAILURE;
}
p->arKey = (char *) pemalloc(nKeyLength,ht->persistent);
if (!p->arKey) {
pefree(p,ht->persistent);
return FAILURE;
}
p->nKeyLength = nKeyLength;
p->pData = pData;
p->h = h;
p->bIsPointer = 1;
memcpy(p->arKey, arKey, nKeyLength);
p->pNext = ht->arBuckets[nIndex];
BLOCK_INTERRUPTIONS;
if (ht->pInternalPointer == NULL) {
ht->pInternalPointer = p;
}
ht->arBuckets[nIndex] = p;
/* Setup the double linked list */
p->pListLast = ht->pListTail;
ht->pListTail = p;
p->pListNext = NULL;
if (p->pListLast != NULL) {
p->pListLast->pListNext = p;
}
if (!ht->pListHead) {
ht->pListHead = p;
}
UNBLOCK_INTERRUPTIONS;
ht->nNumOfElements++;
if_full_do_resize(ht); /* If the Hash table is full, resize it */
return SUCCESS;
}
PHPAPI int _php3_hash_pointer_index_update_or_next_insert(HashTable *ht, ulong h, void *pData, int flag)
{
uint nIndex;
Bucket *p;
#if DEBUG
TLS_VARS;
#endif
CHECK_INDESTROY(ht);
if (flag == HASH_NEXT_INSERT) {
h = ht->nNextFreeElement;
}
nIndex = h % ht->nTableSize;
p = ht->arBuckets[nIndex];
while (p != NULL) {
if ((p->arKey == NULL) && (p->h == h)) {
if (flag == HASH_NEXT_INSERT) {
return FAILURE;
}
#if DEBUG
if (p->pData == pData) {
PUTS("Fatal error in _php3_hash_pointer_update: p->pData == pData\n");
return FAILURE;
}
#endif
BLOCK_INTERRUPTIONS;
if (!p->bIsPointer && ht->pDestructor) {
ht->pDestructor(p->pData);
pefree(p->pData,ht->persistent);
}
p->pData = pData;
p->bIsPointer = 1;
if (h >= ht->nNextFreeElement) {
ht->nNextFreeElement = h + 1;
}
UNBLOCK_INTERRUPTIONS;
return SUCCESS;
}
p = p->pNext;
}
p = (Bucket *) pemalloc(sizeof(Bucket),ht->persistent);
if (!p) {
return FAILURE;
}
p->nKeyLength = 0;
p->pData = pData;
p->h = h;
p->bIsPointer = 1;
p->arKey = (char *)NULL;
p->pNext = ht->arBuckets[nIndex];
BLOCK_INTERRUPTIONS;
if (ht->pInternalPointer == NULL) {
ht->pInternalPointer = p;
}
ht->arBuckets[nIndex] = p;
/* Setup the double linked list */
p->pListLast = ht->pListTail;
ht->pListTail = p;
p->pListNext = NULL;
if (p->pListLast != NULL) {
p->pListLast->pListNext = p;
}
if (!ht->pListHead) {
ht->pListHead = p;
}
UNBLOCK_INTERRUPTIONS;
ht->nNumOfElements++;
if (h >= ht->nNextFreeElement) {
ht->nNextFreeElement = h + 1;
}
if_full_do_resize(ht); /* If the Hash table is full, resize it */
return SUCCESS;
}
PHPAPI int _php3_hash_is_pointer(HashTable *ht, char *arKey, uint nKeyLength)
{
ulong h;
uint nIndex;
Bucket *p;
#if DEBUG
TLS_VARS;
#endif
CHECK_INDESTROY(ht);
if (nKeyLength <= 0) {
#if DEBUG
PUTS("_php3_hash_update: Can't check for empty key\n");
#endif
return FAILURE;
}
HANDLE_NUMERIC(arKey,nKeyLength,_php3_hash_index_is_pointer(ht, idx));
h = ht->pHashFunction(arKey, nKeyLength);
nIndex = h % ht->nTableSize;
p = ht->arBuckets[nIndex];
while (p != NULL) {
if ((p->arKey != NULL) && (p->h == h) && (p->nKeyLength == nKeyLength)) {
if (!memcmp(p->arKey, arKey, nKeyLength)) {
return (p->bIsPointer);
}
}
p = p->pNext;
}
return 0;
}
PHPAPI int _php3_hash_index_is_pointer(HashTable *ht, ulong h)
{
uint nIndex;
Bucket *p;
nIndex = h % ht->nTableSize;
p = ht->arBuckets[nIndex];
while (p != NULL) {
if ((p->arKey == NULL) && (p->h == h)) {
return (p->bIsPointer);
}
p = p->pNext;
}
return 0;
}
int if_full_do_resize(HashTable *ht)
{
Bucket **t;
CHECK_INDESTROY(ht);
if ((ht->nNumOfElements > ht->nTableSize) && (ht->nHashSizeIndex < nNumPrimeNumbers - 1)) { /* Let's double the table
size */
t = (Bucket **) perealloc(ht->arBuckets, PrimeNumbers[ht->nHashSizeIndex + 1] * sizeof(Bucket *),ht->persistent);
if (t) {
BLOCK_INTERRUPTIONS;
ht->arBuckets = t;
ht->nTableSize = PrimeNumbers[ht->nHashSizeIndex + 1];
ht->nHashSizeIndex++;
_php3_hash_rehash(ht);
UNBLOCK_INTERRUPTIONS;
return SUCCESS;
}
return FAILURE;
}
return SUCCESS;
}
int _php3_hash_rehash(HashTable *ht)
{
Bucket *p;
uint nIndex;
CHECK_INDESTROY(ht);
memset(ht->arBuckets, 0, PrimeNumbers[ht->nHashSizeIndex] * sizeof(Bucket *));
p = ht->pListHead;
while (p != NULL) {
nIndex = p->h % ht->nTableSize;
p->pNext = ht->arBuckets[nIndex];
ht->arBuckets[nIndex] = p;
p = p->pListNext;
}
return SUCCESS;
}
PHPAPI int _php3_hash_del_key_or_index(HashTable *ht, char *arKey, uint nKeyLength, ulong h, int flag)
{
uint nIndex;
Bucket *p, *t = NULL; /* initialize just to shut gcc up with -Wall */
CHECK_INDESTROY(ht);
if (flag == HASH_DEL_KEY) {
HANDLE_NUMERIC(arKey,nKeyLength,_php3_hash_del_key_or_index(ht,arKey,nKeyLength,idx,HASH_DEL_INDEX));
h = ht->pHashFunction(arKey, nKeyLength);
}
nIndex = h % ht->nTableSize;
p = ht->arBuckets[nIndex];
while (p != NULL) {
if ((p->h == h) && ((p->arKey == NULL) || /* Numeric index */
((p->arKey != NULL) && (p->nKeyLength == nKeyLength) && (!memcmp(p->arKey, arKey, nKeyLength))))) {
BLOCK_INTERRUPTIONS;
if (p == ht->arBuckets[nIndex]) {
ht->arBuckets[nIndex] = p->pNext;
} else {
t->pNext = p->pNext;
}
if (p->pListLast != NULL) {
p->pListLast->pListNext = p->pListNext;
} else {
/* Deleting the head of the list */
ht->pListHead = p->pListNext;
}
if (p->pListNext != NULL) {
p->pListNext->pListLast = p->pListLast;
} else {
ht->pListTail = p->pListLast;
}
if (flag == HASH_DEL_KEY) {
pefree(p->arKey,ht->persistent);
}
if (!p->bIsPointer) {
if (ht->pDestructor) {
ht->pDestructor(p->pData);
}
pefree(p->pData,ht->persistent);
}
if (ht->pInternalPointer == p) {
ht->pInternalPointer = p->pListNext;
}
pefree(p,ht->persistent);
UNBLOCK_INTERRUPTIONS;
ht->nNumOfElements--;
return SUCCESS;
}
t = p;
p = p->pNext;
}
return FAILURE;
}
PHPAPI void _php3_hash_destroy(HashTable *ht)
{
Bucket *p, *q;
CHECK_INDESTROY(ht);
#if DEBUG
ht->indestroy = 1;
#endif
p = ht->pListHead;
while (p != NULL) {
q = p;
p = p->pListNext;
if (!q->bIsPointer) {
if (ht->pDestructor) {
ht->pDestructor(q->pData);
}
if (q->pData) {
pefree(q->pData,ht->persistent);
}
}
if (q->arKey) {
pefree(q->arKey,ht->persistent);
}
pefree(q,ht->persistent);
}
pefree(ht->arBuckets,ht->persistent);
}
/* This is used to selectively delete certain entries from a hashtable.
* destruct() receives the data and decides if the entry should be deleted
* or not
*/
PHPAPI void _php3_hash_apply(HashTable *ht,int (*destruct) (void *))
{
Bucket *p, *q;
CHECK_INDESTROY(ht);
p = ht->pListHead;
while (p != NULL) {
q = p;
p = p->pListNext;
if (destruct(q->pData)) {
if (q->arKey == NULL) {
_php3_hash_index_del(ht, q->h);
} else {
_php3_hash_del(ht,q->arKey,q->nKeyLength);
}
}
}
}
PHPAPI void _php3_hash_apply_with_argument(HashTable *ht,int (*destruct) (void *, void *), void *argument)
{
Bucket *p, *q;
CHECK_INDESTROY(ht);
p = ht->pListHead;
while (p != NULL) {
q = p;
p = p->pListNext;
if (destruct(q->pData, argument)) {
if (q->arKey == NULL) {
_php3_hash_index_del(ht, q->h);
} else {
_php3_hash_del(ht,q->arKey,q->nKeyLength);
}
}
}
}
#if 1
PHPAPI void _php3_hash_copy(HashTable **target, HashTable *source, void (*pCopyConstructor) (void *pData), void *tmp, uint size)
{
HashTable *t;
Bucket *p;
CHECK_INDESTROY(*target);
CHECK_INDESTROY(source);
t = (HashTable *) pemalloc(sizeof(HashTable),0);
if (!t) {
*target = NULL;
return;
}
if (_php3_hash_init(t, source->nTableSize, source->pHashFunction,source->pDestructor, 0) == FAILURE) {
*target = NULL;
return;
}
p = source->pListHead;
while (p) {
memcpy(tmp, p->pData, size);
pCopyConstructor(tmp);
if (p->arKey) {
_php3_hash_update(t, p->arKey, p->nKeyLength, tmp, size, NULL);
} else {
_php3_hash_index_update(t, p->h, tmp, size, NULL);
}
p = p->pListNext;
}
t->pInternalPointer = t->pListHead;
*target = t;
}
PHPAPI void _php3_hash_merge(HashTable *target, HashTable *source, void (*pCopyConstructor) (void *pData), void *tmp, uint size)
{
Bucket *p;
void *t;
CHECK_INDESTROY(target);
CHECK_INDESTROY(source);
p = source->pListHead;
while (p) {
memcpy(tmp, p->pData, size);
if (p->arKey) {
if (_php3_hash_add(target, p->arKey, p->nKeyLength, tmp, size, &t)==SUCCESS && pCopyConstructor) {
pCopyConstructor(t);
}
} else {
if (!_php3_hash_index_exists(target, p->h) && _php3_hash_index_update(target, p->h, tmp, size, &t)==SUCCESS && pCopyConstructor) {
pCopyConstructor(t);
}
}
p = p->pListNext;
}
target->pInternalPointer = target->pListHead;
}
#else
PHPAPI void _php3_hash_copy(HashTable **target, HashTable *source, void (*pCopyConstructor) (void *pData), void *tmp, uint size)
{
HashTable *t;
Bucket *p,*nb;
uint nIndex;
CHECK_INDESTROY(*target);
CHECK_INDESTROY(source);
t = (HashTable *) pemalloc(sizeof(HashTable),0);
if (!t) {
*target = NULL;
return;
}
memcpy(t,source,sizeof(HashTable));
t->arBuckets = (Bucket **) pecalloc(source->nTableSize, sizeof(Bucket *), 0);
if (!t) {
*target = NULL;
return;
}
t->pListHead = NULL;
t->pListTail = NULL;
p = source->pListHead;
while (p) {
/* Create a duplicate of the bucket */
nb = (Bucket *) pemalloc(sizeof(Bucket),0);
if (!nb) {
*target = NULL;
return;
}
memcpy(nb,p,sizeof(Bucket));
if (p->nKeyLength) {
nb->arKey = (char *) pemalloc(p->nKeyLength,0);
if (!nb->arKey) {
*target = NULL;
return;
}
memcpy(nb->arKey, p->arKey, p->nKeyLength);
}
if (!p->bIsPointer) {
nb->pData = pemalloc(size,0);
if (!nb->pData) {
*target = NULL;
return;
}
memcpy(nb->pData,p->pData,size);
pCopyConstructor(nb->pData);
}
/* Setup the double linked list */
nb->pListLast = t->pListTail;
t->pListTail = nb;
nb->pListNext = NULL;
if (nb->pListLast != NULL) {
nb->pListLast->pListNext = nb;
}
if (!t->pListHead) {
t->pListHead = nb;
}
nIndex = nb->h % t->nTableSize;
nb->pNext = t->arBuckets[nIndex];
t->arBuckets[nIndex] = nb;
p = p->pListNext;
}
t->pInternalPointer = t->pListHead;
*target = t;
}
#endif
/* Returns SUCCESS if found and FAILURE if not. The pointer to the
* data is returned in pData. The reason is that there's no reason
* someone using the hash table might not want to have NULL data
*/
PHPAPI int _php3_hash_find(HashTable *ht, char *arKey, uint nKeyLength, void **pData)
{
ulong h;
uint nIndex;
Bucket *p;
CHECK_INDESTROY(ht);
HANDLE_NUMERIC(arKey, nKeyLength, _php3_hash_index_find(ht,idx,pData));
h = ht->pHashFunction(arKey, nKeyLength);
nIndex = h % ht->nTableSize;
p = ht->arBuckets[nIndex];
while (p != NULL) {
if ((p->arKey != NULL) && (p->h == h) && (p->nKeyLength == nKeyLength)) {
if (!memcmp(p->arKey, arKey, nKeyLength)) {
*pData = p->pData;
return SUCCESS;
}
}
p = p->pNext;
}
return FAILURE;
}
PHPAPI int _php3_hash_exists(HashTable *ht, char *arKey, uint nKeyLength)
{
ulong h;
uint nIndex;
Bucket *p;
CHECK_INDESTROY(ht);
HANDLE_NUMERIC(arKey, nKeyLength, _php3_hash_index_exists(ht,idx));
h = ht->pHashFunction(arKey, nKeyLength);
nIndex = h % ht->nTableSize;
p = ht->arBuckets[nIndex];
while (p != NULL) {
if ((p->arKey != NULL) && (p->h == h) && (p->nKeyLength == nKeyLength)) {
if (!memcmp(p->arKey, arKey, nKeyLength)) {
return 1;
}
}
p = p->pNext;
}
return 0;
}
PHPAPI int _php3_hash_index_find(HashTable *ht, ulong h, void **pData)
{
uint nIndex;
Bucket *p;
CHECK_INDESTROY(ht);
nIndex = h % ht->nTableSize;
p = ht->arBuckets[nIndex];
while (p != NULL) {
if ((p->h == h) && (p->arKey == NULL)) {
*pData = p->pData;
return SUCCESS;
}
p = p->pNext;
}
return FAILURE;
}
PHPAPI int _php3_hash_index_exists(HashTable *ht, ulong h)
{
uint nIndex;
Bucket *p;
CHECK_INDESTROY(ht);
nIndex = h % ht->nTableSize;
p = ht->arBuckets[nIndex];
while (p != NULL) {
if ((p->h == h) && (p->arKey == NULL)) {
return 1;
}
p = p->pNext;
}
return 0;
}
PHPAPI inline int _php3_hash_num_elements(HashTable *ht)
{
CHECK_INDESTROY(ht);
return ht->nNumOfElements;
}
void _php3_hash_internal_pointer_reset(HashTable *ht)
{
CHECK_INDESTROY(ht);
ht->pInternalPointer = ht->pListHead;
}
/* This function will be extremely optimized by remembering
* the end of the list
*/
PHPAPI void _php3_hash_internal_pointer_end(HashTable *ht)
{
CHECK_INDESTROY(ht);
ht->pInternalPointer = ht->pListTail;
}
PHPAPI void _php3_hash_move_forward(HashTable *ht)
{
CHECK_INDESTROY(ht);
if (ht->pInternalPointer) {
ht->pInternalPointer = ht->pInternalPointer->pListNext;
}
}