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php-src/Zend/zend_hash.c
Dmitry Stogov 25d6aee4fb Removed redundant check
2010-07-07 11:44:27 +00:00

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/*
+----------------------------------------------------------------------+
| Zend Engine |
+----------------------------------------------------------------------+
| Copyright (c) 1998-2010 Zend Technologies Ltd. (http://www.zend.com) |
+----------------------------------------------------------------------+
| This source file is subject to version 2.00 of the Zend license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.zend.com/license/2_00.txt. |
| If you did not receive a copy of the Zend license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@zend.com so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Andi Gutmans <andi@zend.com> |
| Zeev Suraski <zeev@zend.com> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#include "zend.h"
#include "zend_globals.h"
#define CONNECT_TO_BUCKET_DLLIST(element, list_head) \
(element)->pNext = (list_head); \
(element)->pLast = NULL; \
if ((element)->pNext) { \
(element)->pNext->pLast = (element); \
}
#define CONNECT_TO_GLOBAL_DLLIST(element, ht) \
(element)->pListLast = (ht)->pListTail; \
(ht)->pListTail = (element); \
(element)->pListNext = NULL; \
if ((element)->pListLast != NULL) { \
(element)->pListLast->pListNext = (element); \
} \
if (!(ht)->pListHead) { \
(ht)->pListHead = (element); \
} \
if ((ht)->pInternalPointer == NULL) { \
(ht)->pInternalPointer = (element); \
}
#if ZEND_DEBUG
#define HT_OK 0
#define HT_IS_DESTROYING 1
#define HT_DESTROYED 2
#define HT_CLEANING 3
static void _zend_is_inconsistent(const HashTable *ht, const char *file, int line)
{
if (ht->inconsistent==HT_OK) {
return;
}
switch (ht->inconsistent) {
case HT_IS_DESTROYING:
zend_output_debug_string(1, "%s(%d) : ht=%p is being destroyed", file, line, ht);
break;
case HT_DESTROYED:
zend_output_debug_string(1, "%s(%d) : ht=%p is already destroyed", file, line, ht);
break;
case HT_CLEANING:
zend_output_debug_string(1, "%s(%d) : ht=%p is being cleaned", file, line, ht);
break;
}
zend_bailout();
}
#define IS_CONSISTENT(a) _zend_is_inconsistent(a, __FILE__, __LINE__);
#define SET_INCONSISTENT(n) ht->inconsistent = n;
#else
#define IS_CONSISTENT(a)
#define SET_INCONSISTENT(n)
#endif
#define HASH_PROTECT_RECURSION(ht) \
if ((ht)->bApplyProtection) { \
if ((ht)->nApplyCount++ >= 3) { \
zend_error(E_ERROR, "Nesting level too deep - recursive dependency?"); \
} \
}
#define HASH_UNPROTECT_RECURSION(ht) \
if ((ht)->bApplyProtection) { \
(ht)->nApplyCount--; \
}
#define ZEND_HASH_IF_FULL_DO_RESIZE(ht) \
if ((ht)->nNumOfElements > (ht)->nTableSize) { \
zend_hash_do_resize(ht); \
}
static int zend_hash_do_resize(HashTable *ht);
ZEND_API ulong zend_hash_func(const char *arKey, uint nKeyLength)
{
return zend_inline_hash_func(arKey, nKeyLength);
}
#define UPDATE_DATA(ht, p, pData, nDataSize) \
if (nDataSize == sizeof(void*)) { \
if ((p)->pData != &(p)->pDataPtr) { \
pefree_rel((p)->pData, (ht)->persistent); \
} \
memcpy(&(p)->pDataPtr, pData, sizeof(void *)); \
(p)->pData = &(p)->pDataPtr; \
} else { \
if ((p)->pData == &(p)->pDataPtr) { \
(p)->pData = (void *) pemalloc_rel(nDataSize, (ht)->persistent); \
(p)->pDataPtr=NULL; \
} else { \
(p)->pData = (void *) perealloc_rel((p)->pData, nDataSize, (ht)->persistent); \
/* (p)->pDataPtr is already NULL so no need to initialize it */ \
} \
memcpy((p)->pData, pData, nDataSize); \
}
#define INIT_DATA(ht, p, pData, nDataSize); \
if (nDataSize == sizeof(void*)) { \
memcpy(&(p)->pDataPtr, pData, sizeof(void *)); \
(p)->pData = &(p)->pDataPtr; \
} else { \
(p)->pData = (void *) pemalloc_rel(nDataSize, (ht)->persistent);\
if (!(p)->pData) { \
pefree_rel(p, (ht)->persistent); \
return FAILURE; \
} \
memcpy((p)->pData, pData, nDataSize); \
(p)->pDataPtr=NULL; \
}
#define CHECK_INIT(ht) do { \
if (UNEXPECTED((ht)->nTableMask == 0)) { \
(ht)->nTableMask = (ht)->nTableSize - 1; \
(ht)->arBuckets = (Bucket **) pecalloc((ht)->nTableSize, sizeof(Bucket *), (ht)->persistent); \
} \
} while (0)
static const Bucket *uninitialized_bucket = NULL;
ZEND_API int _zend_hash_init(HashTable *ht, uint nSize, hash_func_t pHashFunction, dtor_func_t pDestructor, zend_bool persistent ZEND_FILE_LINE_DC)
{
uint i = 3;
SET_INCONSISTENT(HT_OK);
if (nSize >= 0x80000000) {
/* prevent overflow */
ht->nTableSize = 0x80000000;
} else {
while ((1U << i) < nSize) {
i++;
}
ht->nTableSize = 1 << i;
}
ht->nTableMask = 0; /* 0 means that ht->arBuckets is uninitialized */
ht->pDestructor = pDestructor;
ht->arBuckets = (Bucket**)&uninitialized_bucket;
ht->pListHead = NULL;
ht->pListTail = NULL;
ht->nNumOfElements = 0;
ht->nNextFreeElement = 0;
ht->pInternalPointer = NULL;
ht->persistent = persistent;
ht->nApplyCount = 0;
ht->bApplyProtection = 1;
return SUCCESS;
}
ZEND_API int _zend_hash_init_ex(HashTable *ht, uint nSize, hash_func_t pHashFunction, dtor_func_t pDestructor, zend_bool persistent, zend_bool bApplyProtection ZEND_FILE_LINE_DC)
{
int retval = _zend_hash_init(ht, nSize, pHashFunction, pDestructor, persistent ZEND_FILE_LINE_CC);
ht->bApplyProtection = bApplyProtection;
return retval;
}
ZEND_API void zend_hash_set_apply_protection(HashTable *ht, zend_bool bApplyProtection)
{
ht->bApplyProtection = bApplyProtection;
}
ZEND_API int _zend_hash_add_or_update(HashTable *ht, const char *arKey, uint nKeyLength, void *pData, uint nDataSize, void **pDest, int flag ZEND_FILE_LINE_DC)
{
ulong h;
uint nIndex;
Bucket *p;
IS_CONSISTENT(ht);
if (nKeyLength <= 0) {
#if ZEND_DEBUG
ZEND_PUTS("zend_hash_update: Can't put in empty key\n");
#endif
return FAILURE;
}
CHECK_INIT(ht);
h = zend_inline_hash_func(arKey, nKeyLength);
nIndex = h & ht->nTableMask;
p = ht->arBuckets[nIndex];
while (p != NULL) {
if (p->arKey == arKey ||
((p->h == h) && (p->nKeyLength == nKeyLength) && !memcmp(p->arKey, arKey, nKeyLength))) {
if (flag & HASH_ADD) {
return FAILURE;
}
HANDLE_BLOCK_INTERRUPTIONS();
#if ZEND_DEBUG
if (p->pData == pData) {
ZEND_PUTS("Fatal error in zend_hash_update: p->pData == pData\n");
HANDLE_UNBLOCK_INTERRUPTIONS();
return FAILURE;
}
#endif
if (ht->pDestructor) {
ht->pDestructor(p->pData);
}
UPDATE_DATA(ht, p, pData, nDataSize);
if (pDest) {
*pDest = p->pData;
}
HANDLE_UNBLOCK_INTERRUPTIONS();
return SUCCESS;
}
p = p->pNext;
}
if (IS_INTERNED(arKey)) {
p = (Bucket *) pemalloc(sizeof(Bucket), ht->persistent);
if (!p) {
return FAILURE;
}
p->arKey = (char*)arKey;
} else {
p = (Bucket *) pemalloc(sizeof(Bucket) + nKeyLength, ht->persistent);
if (!p) {
return FAILURE;
}
p->arKey = (char*)(p + 1);
memcpy(p->arKey, arKey, nKeyLength);
}
p->nKeyLength = nKeyLength;
INIT_DATA(ht, p, pData, nDataSize);
p->h = h;
CONNECT_TO_BUCKET_DLLIST(p, ht->arBuckets[nIndex]);
if (pDest) {
*pDest = p->pData;
}
HANDLE_BLOCK_INTERRUPTIONS();
CONNECT_TO_GLOBAL_DLLIST(p, ht);
ht->arBuckets[nIndex] = p;
HANDLE_UNBLOCK_INTERRUPTIONS();
ht->nNumOfElements++;
ZEND_HASH_IF_FULL_DO_RESIZE(ht); /* If the Hash table is full, resize it */
return SUCCESS;
}
ZEND_API int _zend_hash_quick_add_or_update(HashTable *ht, const char *arKey, uint nKeyLength, ulong h, void *pData, uint nDataSize, void **pDest, int flag ZEND_FILE_LINE_DC)
{
uint nIndex;
Bucket *p;
IS_CONSISTENT(ht);
if (nKeyLength == 0) {
return zend_hash_index_update(ht, h, pData, nDataSize, pDest);
}
CHECK_INIT(ht);
nIndex = h & ht->nTableMask;
p = ht->arBuckets[nIndex];
while (p != NULL) {
if (p->arKey == arKey ||
((p->h == h) && (p->nKeyLength == nKeyLength) && !memcmp(p->arKey, arKey, nKeyLength))) {
if (flag & HASH_ADD) {
return FAILURE;
}
HANDLE_BLOCK_INTERRUPTIONS();
#if ZEND_DEBUG
if (p->pData == pData) {
ZEND_PUTS("Fatal error in zend_hash_update: p->pData == pData\n");
HANDLE_UNBLOCK_INTERRUPTIONS();
return FAILURE;
}
#endif
if (ht->pDestructor) {
ht->pDestructor(p->pData);
}
UPDATE_DATA(ht, p, pData, nDataSize);
if (pDest) {
*pDest = p->pData;
}
HANDLE_UNBLOCK_INTERRUPTIONS();
return SUCCESS;
}
p = p->pNext;
}
if (IS_INTERNED(arKey)) {
p = (Bucket *) pemalloc(sizeof(Bucket), ht->persistent);
if (!p) {
return FAILURE;
}
p->arKey = (char*)arKey;
} else {
p = (Bucket *) pemalloc(sizeof(Bucket) + nKeyLength, ht->persistent);
if (!p) {
return FAILURE;
}
p->arKey = (char*)(p + 1);
memcpy(p->arKey, arKey, nKeyLength);
}
p->nKeyLength = nKeyLength;
INIT_DATA(ht, p, pData, nDataSize);
p->h = h;
CONNECT_TO_BUCKET_DLLIST(p, ht->arBuckets[nIndex]);
if (pDest) {
*pDest = p->pData;
}
HANDLE_BLOCK_INTERRUPTIONS();
ht->arBuckets[nIndex] = p;
CONNECT_TO_GLOBAL_DLLIST(p, ht);
HANDLE_UNBLOCK_INTERRUPTIONS();
ht->nNumOfElements++;
ZEND_HASH_IF_FULL_DO_RESIZE(ht); /* If the Hash table is full, resize it */
return SUCCESS;
}
ZEND_API int zend_hash_add_empty_element(HashTable *ht, const char *arKey, uint nKeyLength)
{
void *dummy = (void *) 1;
return zend_hash_add(ht, arKey, nKeyLength, &dummy, sizeof(void *), NULL);
}
ZEND_API int _zend_hash_index_update_or_next_insert(HashTable *ht, ulong h, void *pData, uint nDataSize, void **pDest, int flag ZEND_FILE_LINE_DC)
{
uint nIndex;
Bucket *p;
IS_CONSISTENT(ht);
CHECK_INIT(ht);
if (flag & HASH_NEXT_INSERT) {
h = ht->nNextFreeElement;
}
nIndex = h & ht->nTableMask;
p = ht->arBuckets[nIndex];
while (p != NULL) {
if ((p->nKeyLength == 0) && (p->h == h)) {
if (flag & HASH_NEXT_INSERT || flag & HASH_ADD) {
return FAILURE;
}
HANDLE_BLOCK_INTERRUPTIONS();
#if ZEND_DEBUG
if (p->pData == pData) {
ZEND_PUTS("Fatal error in zend_hash_index_update: p->pData == pData\n");
HANDLE_UNBLOCK_INTERRUPTIONS();
return FAILURE;
}
#endif
if (ht->pDestructor) {
ht->pDestructor(p->pData);
}
UPDATE_DATA(ht, p, pData, nDataSize);
HANDLE_UNBLOCK_INTERRUPTIONS();
if ((long)h >= (long)ht->nNextFreeElement) {
ht->nNextFreeElement = h < LONG_MAX ? h + 1 : LONG_MAX;
}
if (pDest) {
*pDest = p->pData;
}
return SUCCESS;
}
p = p->pNext;
}
p = (Bucket *) pemalloc_rel(sizeof(Bucket), ht->persistent);
if (!p) {
return FAILURE;
}
p->arKey = NULL;
p->nKeyLength = 0; /* Numeric indices are marked by making the nKeyLength == 0 */
p->h = h;
INIT_DATA(ht, p, pData, nDataSize);
if (pDest) {
*pDest = p->pData;
}
CONNECT_TO_BUCKET_DLLIST(p, ht->arBuckets[nIndex]);
HANDLE_BLOCK_INTERRUPTIONS();
ht->arBuckets[nIndex] = p;
CONNECT_TO_GLOBAL_DLLIST(p, ht);
HANDLE_UNBLOCK_INTERRUPTIONS();
if ((long)h >= (long)ht->nNextFreeElement) {
ht->nNextFreeElement = h < LONG_MAX ? h + 1 : LONG_MAX;
}
ht->nNumOfElements++;
ZEND_HASH_IF_FULL_DO_RESIZE(ht);
return SUCCESS;
}
static int zend_hash_do_resize(HashTable *ht)
{
Bucket **t;
IS_CONSISTENT(ht);
if ((ht->nTableSize << 1) > 0) { /* Let's double the table size */
t = (Bucket **) perealloc_recoverable(ht->arBuckets, (ht->nTableSize << 1) * sizeof(Bucket *), ht->persistent);
if (t) {
HANDLE_BLOCK_INTERRUPTIONS();
ht->arBuckets = t;
ht->nTableSize = (ht->nTableSize << 1);
ht->nTableMask = ht->nTableSize - 1;
zend_hash_rehash(ht);
HANDLE_UNBLOCK_INTERRUPTIONS();
return SUCCESS;
}
return FAILURE;
}
return SUCCESS;
}
ZEND_API int zend_hash_rehash(HashTable *ht)
{
Bucket *p;
uint nIndex;
IS_CONSISTENT(ht);
if (UNEXPECTED(ht->nNumOfElements == 0)) {
return SUCCESS;
}
memset(ht->arBuckets, 0, ht->nTableSize * sizeof(Bucket *));
p = ht->pListHead;
while (p != NULL) {
nIndex = p->h & ht->nTableMask;
CONNECT_TO_BUCKET_DLLIST(p, ht->arBuckets[nIndex]);
ht->arBuckets[nIndex] = p;
p = p->pListNext;
}
return SUCCESS;
}
ZEND_API int zend_hash_del_key_or_index(HashTable *ht, const char *arKey, uint nKeyLength, ulong h, int flag)
{
uint nIndex;
Bucket *p;
IS_CONSISTENT(ht);
if (flag == HASH_DEL_KEY) {
h = zend_inline_hash_func(arKey, nKeyLength);
}
nIndex = h & ht->nTableMask;
p = ht->arBuckets[nIndex];
while (p != NULL) {
if ((p->h == h)
&& (p->nKeyLength == nKeyLength)
&& ((p->nKeyLength == 0) /* Numeric index (short circuits the memcmp() check) */
|| !memcmp(p->arKey, arKey, nKeyLength))) { /* String index */
HANDLE_BLOCK_INTERRUPTIONS();
if (p == ht->arBuckets[nIndex]) {
ht->arBuckets[nIndex] = p->pNext;
} else {
p->pLast->pNext = p->pNext;
}
if (p->pNext) {
p->pNext->pLast = p->pLast;
}
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 (ht->pInternalPointer == p) {
ht->pInternalPointer = p->pListNext;
}
if (ht->pDestructor) {
ht->pDestructor(p->pData);
}
if (p->pData != &p->pDataPtr) {
pefree(p->pData, ht->persistent);
}
pefree(p, ht->persistent);
HANDLE_UNBLOCK_INTERRUPTIONS();
ht->nNumOfElements--;
return SUCCESS;
}
p = p->pNext;
}
return FAILURE;
}
ZEND_API void zend_hash_destroy(HashTable *ht)
{
Bucket *p, *q;
IS_CONSISTENT(ht);
SET_INCONSISTENT(HT_IS_DESTROYING);
p = ht->pListHead;
while (p != NULL) {
q = p;
p = p->pListNext;
if (ht->pDestructor) {
ht->pDestructor(q->pData);
}
if (q->pData != &q->pDataPtr) {
pefree(q->pData, ht->persistent);
}
pefree(q, ht->persistent);
}
if (ht->nTableMask) {
pefree(ht->arBuckets, ht->persistent);
}
SET_INCONSISTENT(HT_DESTROYED);
}
ZEND_API void zend_hash_clean(HashTable *ht)
{
Bucket *p, *q;
IS_CONSISTENT(ht);
SET_INCONSISTENT(HT_CLEANING);
p = ht->pListHead;
while (p != NULL) {
q = p;
p = p->pListNext;
if (ht->pDestructor) {
ht->pDestructor(q->pData);
}
if (q->pData != &q->pDataPtr) {
pefree(q->pData, ht->persistent);
}
pefree(q, ht->persistent);
}
if (ht->nTableMask) {
memset(ht->arBuckets, 0, ht->nTableSize*sizeof(Bucket *));
}
ht->pListHead = NULL;
ht->pListTail = NULL;
ht->nNumOfElements = 0;
ht->nNextFreeElement = 0;
ht->pInternalPointer = NULL;
SET_INCONSISTENT(HT_OK);
}
/* This function is used by the various apply() functions.
* It deletes the passed bucket, and returns the address of the
* next bucket. The hash *may* be altered during that time, the
* returned value will still be valid.
*/
static Bucket *zend_hash_apply_deleter(HashTable *ht, Bucket *p)
{
Bucket *retval;
HANDLE_BLOCK_INTERRUPTIONS();
if (p->pLast) {
p->pLast->pNext = p->pNext;
} else {
uint nIndex;
nIndex = p->h & ht->nTableMask;
ht->arBuckets[nIndex] = p->pNext;
}
if (p->pNext) {
p->pNext->pLast = p->pLast;
} else {
/* Nothing to do as this list doesn't have a tail */
}
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 (ht->pInternalPointer == p) {
ht->pInternalPointer = p->pListNext;
}
ht->nNumOfElements--;
HANDLE_UNBLOCK_INTERRUPTIONS();
if (ht->pDestructor) {
ht->pDestructor(p->pData);
}
if (p->pData != &p->pDataPtr) {
pefree(p->pData, ht->persistent);
}
retval = p->pListNext;
pefree(p, ht->persistent);
return retval;
}
ZEND_API void zend_hash_graceful_destroy(HashTable *ht)
{
Bucket *p;
IS_CONSISTENT(ht);
p = ht->pListHead;
while (p != NULL) {
p = zend_hash_apply_deleter(ht, p);
}
if (ht->nTableMask) {
pefree(ht->arBuckets, ht->persistent);
}
SET_INCONSISTENT(HT_DESTROYED);
}
ZEND_API void zend_hash_graceful_reverse_destroy(HashTable *ht)
{
Bucket *p;
IS_CONSISTENT(ht);
p = ht->pListTail;
while (p != NULL) {
zend_hash_apply_deleter(ht, p);
p = ht->pListTail;
}
if (ht->nTableMask) {
pefree(ht->arBuckets, ht->persistent);
}
SET_INCONSISTENT(HT_DESTROYED);
}
/* This is used to recurse elements and selectively delete certain entries
* from a hashtable. apply_func() receives the data and decides if the entry
* should be deleted or recursion should be stopped. The following three
* return codes are possible:
* ZEND_HASH_APPLY_KEEP - continue
* ZEND_HASH_APPLY_STOP - stop iteration
* ZEND_HASH_APPLY_REMOVE - delete the element, combineable with the former
*/
ZEND_API void zend_hash_apply(HashTable *ht, apply_func_t apply_func TSRMLS_DC)
{
Bucket *p;
IS_CONSISTENT(ht);
HASH_PROTECT_RECURSION(ht);
p = ht->pListHead;
while (p != NULL) {
int result = apply_func(p->pData TSRMLS_CC);
if (result & ZEND_HASH_APPLY_REMOVE) {
p = zend_hash_apply_deleter(ht, p);
} else {
p = p->pListNext;
}
if (result & ZEND_HASH_APPLY_STOP) {
break;
}
}
HASH_UNPROTECT_RECURSION(ht);
}
ZEND_API void zend_hash_apply_with_argument(HashTable *ht, apply_func_arg_t apply_func, void *argument TSRMLS_DC)
{
Bucket *p;
IS_CONSISTENT(ht);
HASH_PROTECT_RECURSION(ht);
p = ht->pListHead;
while (p != NULL) {
int result = apply_func(p->pData, argument TSRMLS_CC);
if (result & ZEND_HASH_APPLY_REMOVE) {
p = zend_hash_apply_deleter(ht, p);
} else {
p = p->pListNext;
}
if (result & ZEND_HASH_APPLY_STOP) {
break;
}
}
HASH_UNPROTECT_RECURSION(ht);
}
ZEND_API void zend_hash_apply_with_arguments(HashTable *ht TSRMLS_DC, apply_func_args_t apply_func, int num_args, ...)
{
Bucket *p;
va_list args;
zend_hash_key hash_key;
IS_CONSISTENT(ht);
HASH_PROTECT_RECURSION(ht);
p = ht->pListHead;
while (p != NULL) {
int result;
va_start(args, num_args);
hash_key.arKey = p->arKey;
hash_key.nKeyLength = p->nKeyLength;
hash_key.h = p->h;
result = apply_func(p->pData TSRMLS_CC, num_args, args, &hash_key);
if (result & ZEND_HASH_APPLY_REMOVE) {
p = zend_hash_apply_deleter(ht, p);
} else {
p = p->pListNext;
}
if (result & ZEND_HASH_APPLY_STOP) {
break;
}
va_end(args);
}
HASH_UNPROTECT_RECURSION(ht);
}
ZEND_API void zend_hash_reverse_apply(HashTable *ht, apply_func_t apply_func TSRMLS_DC)
{
Bucket *p, *q;
IS_CONSISTENT(ht);
HASH_PROTECT_RECURSION(ht);
p = ht->pListTail;
while (p != NULL) {
int result = apply_func(p->pData TSRMLS_CC);
q = p;
p = p->pListLast;
if (result & ZEND_HASH_APPLY_REMOVE) {
zend_hash_apply_deleter(ht, q);
}
if (result & ZEND_HASH_APPLY_STOP) {
break;
}
}
HASH_UNPROTECT_RECURSION(ht);
}
ZEND_API void zend_hash_copy(HashTable *target, HashTable *source, copy_ctor_func_t pCopyConstructor, void *tmp, uint size)
{
Bucket *p;
void *new_entry;
zend_bool setTargetPointer;
IS_CONSISTENT(source);
IS_CONSISTENT(target);
setTargetPointer = !target->pInternalPointer;
p = source->pListHead;
while (p) {
if (setTargetPointer && source->pInternalPointer == p) {
target->pInternalPointer = NULL;
}
if (p->nKeyLength) {
zend_hash_quick_update(target, p->arKey, p->nKeyLength, p->h, p->pData, size, &new_entry);
} else {
zend_hash_index_update(target, p->h, p->pData, size, &new_entry);
}
if (pCopyConstructor) {
pCopyConstructor(new_entry);
}
p = p->pListNext;
}
if (!target->pInternalPointer) {
target->pInternalPointer = target->pListHead;
}
}
ZEND_API void _zend_hash_merge(HashTable *target, HashTable *source, copy_ctor_func_t pCopyConstructor, void *tmp, uint size, int overwrite ZEND_FILE_LINE_DC)
{
Bucket *p;
void *t;
int mode = (overwrite?HASH_UPDATE:HASH_ADD);
IS_CONSISTENT(source);
IS_CONSISTENT(target);
p = source->pListHead;
while (p) {
if (p->nKeyLength>0) {
if (_zend_hash_quick_add_or_update(target, p->arKey, p->nKeyLength, p->h, p->pData, size, &t, mode ZEND_FILE_LINE_RELAY_CC)==SUCCESS && pCopyConstructor) {
pCopyConstructor(t);
}
} else {
if ((mode==HASH_UPDATE || !zend_hash_index_exists(target, p->h)) && zend_hash_index_update(target, p->h, p->pData, size, &t)==SUCCESS && pCopyConstructor) {
pCopyConstructor(t);
}
}
p = p->pListNext;
}
target->pInternalPointer = target->pListHead;
}
static zend_bool zend_hash_replace_checker_wrapper(HashTable *target, void *source_data, Bucket *p, void *pParam, merge_checker_func_t merge_checker_func)
{
zend_hash_key hash_key;
hash_key.arKey = p->arKey;
hash_key.nKeyLength = p->nKeyLength;
hash_key.h = p->h;
return merge_checker_func(target, source_data, &hash_key, pParam);
}
ZEND_API void zend_hash_merge_ex(HashTable *target, HashTable *source, copy_ctor_func_t pCopyConstructor, uint size, merge_checker_func_t pMergeSource, void *pParam)
{
Bucket *p;
void *t;
IS_CONSISTENT(source);
IS_CONSISTENT(target);
p = source->pListHead;
while (p) {
if (zend_hash_replace_checker_wrapper(target, p->pData, p, pParam, pMergeSource)) {
if (zend_hash_quick_update(target, p->arKey, p->nKeyLength, p->h, p->pData, size, &t)==SUCCESS && pCopyConstructor) {
pCopyConstructor(t);
}
}
p = p->pListNext;
}
target->pInternalPointer = target->pListHead;
}
ZEND_API ulong zend_get_hash_value(const char *arKey, uint nKeyLength)
{
return zend_inline_hash_func(arKey, nKeyLength);
}
/* 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
*/
ZEND_API int zend_hash_find(const HashTable *ht, const char *arKey, uint nKeyLength, void **pData)
{
ulong h;
uint nIndex;
Bucket *p;
IS_CONSISTENT(ht);
h = zend_inline_hash_func(arKey, nKeyLength);
nIndex = h & ht->nTableMask;
p = ht->arBuckets[nIndex];
while (p != NULL) {
if (p->arKey == arKey ||
((p->h == h) && (p->nKeyLength == nKeyLength) && !memcmp(p->arKey, arKey, nKeyLength))) {
*pData = p->pData;
return SUCCESS;
}
p = p->pNext;
}
return FAILURE;
}
ZEND_API int zend_hash_quick_find(const HashTable *ht, const char *arKey, uint nKeyLength, ulong h, void **pData)
{
uint nIndex;
Bucket *p;
if (nKeyLength==0) {
return zend_hash_index_find(ht, h, pData);
}
IS_CONSISTENT(ht);
nIndex = h & ht->nTableMask;
p = ht->arBuckets[nIndex];
while (p != NULL) {
if (p->arKey == arKey ||
((p->h == h) && (p->nKeyLength == nKeyLength) && !memcmp(p->arKey, arKey, nKeyLength))) {
*pData = p->pData;
return SUCCESS;
}
p = p->pNext;
}
return FAILURE;
}
ZEND_API int zend_hash_exists(const HashTable *ht, const char *arKey, uint nKeyLength)
{
ulong h;
uint nIndex;
Bucket *p;
IS_CONSISTENT(ht);
h = zend_inline_hash_func(arKey, nKeyLength);
nIndex = h & ht->nTableMask;
p = ht->arBuckets[nIndex];
while (p != NULL) {
if (p->arKey == arKey ||
((p->h == h) && (p->nKeyLength == nKeyLength) && !memcmp(p->arKey, arKey, nKeyLength))) {
return 1;
}
p = p->pNext;
}
return 0;
}
ZEND_API int zend_hash_quick_exists(const HashTable *ht, const char *arKey, uint nKeyLength, ulong h)
{
uint nIndex;
Bucket *p;
if (nKeyLength==0) {
return zend_hash_index_exists(ht, h);
}
IS_CONSISTENT(ht);
nIndex = h & ht->nTableMask;
p = ht->arBuckets[nIndex];
while (p != NULL) {
if (p->arKey == arKey ||
((p->h == h) && (p->nKeyLength == nKeyLength) && !memcmp(p->arKey, arKey, nKeyLength))) {
return 1;
}
p = p->pNext;
}
return 0;
}
ZEND_API int zend_hash_index_find(const HashTable *ht, ulong h, void **pData)
{
uint nIndex;
Bucket *p;
IS_CONSISTENT(ht);
nIndex = h & ht->nTableMask;
p = ht->arBuckets[nIndex];
while (p != NULL) {
if ((p->h == h) && (p->nKeyLength == 0)) {
*pData = p->pData;
return SUCCESS;
}
p = p->pNext;
}
return FAILURE;
}
ZEND_API int zend_hash_index_exists(const HashTable *ht, ulong h)
{
uint nIndex;
Bucket *p;
IS_CONSISTENT(ht);
nIndex = h & ht->nTableMask;
p = ht->arBuckets[nIndex];
while (p != NULL) {
if ((p->h == h) && (p->nKeyLength == 0)) {
return 1;
}
p = p->pNext;
}
return 0;
}
ZEND_API int zend_hash_num_elements(const HashTable *ht)
{
IS_CONSISTENT(ht);
return ht->nNumOfElements;
}
ZEND_API int zend_hash_get_pointer(const HashTable *ht, HashPointer *ptr)
{
ptr->pos = ht->pInternalPointer;
if (ht->pInternalPointer) {
ptr->h = ht->pInternalPointer->h;
return 1;
} else {
ptr->h = 0;
return 0;
}
}
ZEND_API int zend_hash_set_pointer(HashTable *ht, const HashPointer *ptr)
{
if (ptr->pos == NULL) {
ht->pInternalPointer = NULL;
} else if (ht->pInternalPointer != ptr->pos) {
Bucket *p;
IS_CONSISTENT(ht);
p = ht->arBuckets[ptr->h & ht->nTableMask];
while (p != NULL) {
if (p == ptr->pos) {
ht->pInternalPointer = p;
return 1;
}
p = p->pNext;
}
return 0;
}
return 1;
}
ZEND_API void zend_hash_internal_pointer_reset_ex(HashTable *ht, HashPosition *pos)
{
IS_CONSISTENT(ht);
if (pos)
*pos = ht->pListHead;
else
ht->pInternalPointer = ht->pListHead;
}
/* This function will be extremely optimized by remembering
* the end of the list
*/
ZEND_API void zend_hash_internal_pointer_end_ex(HashTable *ht, HashPosition *pos)
{
IS_CONSISTENT(ht);
if (pos)
*pos = ht->pListTail;
else
ht->pInternalPointer = ht->pListTail;
}
ZEND_API int zend_hash_move_forward_ex(HashTable *ht, HashPosition *pos)
{
HashPosition *current = pos ? pos : &ht->pInternalPointer;
IS_CONSISTENT(ht);
if (*current) {
*current = (*current)->pListNext;
return SUCCESS;
} else
return FAILURE;
}
ZEND_API int zend_hash_move_backwards_ex(HashTable *ht, HashPosition *pos)
{
HashPosition *current = pos ? pos : &ht->pInternalPointer;
IS_CONSISTENT(ht);
if (*current) {
*current = (*current)->pListLast;
return SUCCESS;
} else
return FAILURE;
}
/* This function should be made binary safe */
ZEND_API int zend_hash_get_current_key_ex(const HashTable *ht, char **str_index, uint *str_length, ulong *num_index, zend_bool duplicate, HashPosition *pos)
{
Bucket *p;
p = pos ? (*pos) : ht->pInternalPointer;
IS_CONSISTENT(ht);
if (p) {
if (p->nKeyLength) {
if (duplicate) {
*str_index = estrndup(p->arKey, p->nKeyLength - 1);
} else {
*str_index = p->arKey;
}
if (str_length) {
*str_length = p->nKeyLength;
}
return HASH_KEY_IS_STRING;
} else {
*num_index = p->h;
return HASH_KEY_IS_LONG;
}
}
return HASH_KEY_NON_EXISTANT;
}
ZEND_API int zend_hash_get_current_key_type_ex(HashTable *ht, HashPosition *pos)
{
Bucket *p;
p = pos ? (*pos) : ht->pInternalPointer;
IS_CONSISTENT(ht);
if (p) {
if (p->nKeyLength) {
return HASH_KEY_IS_STRING;
} else {
return HASH_KEY_IS_LONG;
}
}
return HASH_KEY_NON_EXISTANT;
}
ZEND_API int zend_hash_get_current_data_ex(HashTable *ht, void **pData, HashPosition *pos)
{
Bucket *p;
p = pos ? (*pos) : ht->pInternalPointer;
IS_CONSISTENT(ht);
if (p) {
*pData = p->pData;
return SUCCESS;
} else {
return FAILURE;
}
}
/* This function changes key of currevt element without changing elements'
* order. If element with target key already exists, it will be deleted first.
*/
ZEND_API int zend_hash_update_current_key_ex(HashTable *ht, int key_type, const char *str_index, uint str_length, ulong num_index, int mode, HashPosition *pos)
{
Bucket *p;
p = pos ? (*pos) : ht->pInternalPointer;
IS_CONSISTENT(ht);
if (p) {
if (key_type == HASH_KEY_IS_LONG) {
str_length = 0;
if (!p->nKeyLength && p->h == num_index) {
return SUCCESS;
}
if (mode != HASH_UPDATE_KEY_ANYWAY) {
Bucket *q = ht->arBuckets[num_index & ht->nTableMask];
int found = 0;
while (q != NULL) {
if (q == p) {
found = 1;
} else if (!q->nKeyLength && q->h == num_index) {
if (found) {
if (mode & HASH_UPDATE_KEY_IF_BEFORE) {
break;
} else {
if (p->nKeyLength) {
zend_hash_del(ht, p->arKey, p->nKeyLength);
} else {
zend_hash_index_del(ht, p->h);
}
return FAILURE;
}
} else {
if (mode & HASH_UPDATE_KEY_IF_AFTER) {
break;
} else {
if (p->nKeyLength) {
zend_hash_del(ht, p->arKey, p->nKeyLength);
} else {
zend_hash_index_del(ht, p->h);
}
return FAILURE;
}
}
}
q = q->pNext;
}
}
zend_hash_index_del(ht, num_index);
} else if (key_type == HASH_KEY_IS_STRING) {
if (p->nKeyLength == str_length &&
memcmp(p->arKey, str_index, str_length) == 0) {
return SUCCESS;
}
if (mode != HASH_UPDATE_KEY_ANYWAY) {
ulong h = zend_inline_hash_func(str_index, str_length);
Bucket *q = ht->arBuckets[h & ht->nTableMask];
int found = 0;
while (q != NULL) {
if (q == p) {
found = 1;
} else if (q->h == h && q->nKeyLength == str_length &&
memcmp(q->arKey, str_index, str_length) == 0) {
if (found) {
if (mode & HASH_UPDATE_KEY_IF_BEFORE) {
break;
} else {
if (p->nKeyLength) {
zend_hash_del(ht, p->arKey, p->nKeyLength);
} else {
zend_hash_index_del(ht, p->h);
}
return FAILURE;
}
} else {
if (mode & HASH_UPDATE_KEY_IF_AFTER) {
break;
} else {
if (p->nKeyLength) {
zend_hash_del(ht, p->arKey, p->nKeyLength);
} else {
zend_hash_index_del(ht, p->h);
}
return FAILURE;
}
}
}
q = q->pNext;
}
}
zend_hash_del(ht, str_index, str_length);
} else {
return FAILURE;
}
HANDLE_BLOCK_INTERRUPTIONS();
if (p->pNext) {
p->pNext->pLast = p->pLast;
}
if (p->pLast) {
p->pLast->pNext = p->pNext;
} else{
ht->arBuckets[p->h & ht->nTableMask] = p->pNext;
}
if (p->nKeyLength != str_length) {
Bucket *q = (Bucket *) pemalloc(sizeof(Bucket) + str_length, ht->persistent);
q->nKeyLength = str_length;
if (p->pData == &p->pDataPtr) {
q->pData = &q->pDataPtr;
} else {
q->pData = p->pData;
}
q->pDataPtr = p->pDataPtr;
q->pListNext = p->pListNext;
q->pListLast = p->pListLast;
if (q->pListNext) {
p->pListNext->pListLast = q;
} else {
ht->pListTail = q;
}
if (q->pListLast) {
p->pListLast->pListNext = q;
} else {
ht->pListHead = q;
}
if (ht->pInternalPointer == p) {
ht->pInternalPointer = q;
}
if (pos) {
*pos = q;
}
pefree(p, ht->persistent);
p = q;
}
if (key_type == HASH_KEY_IS_LONG) {
p->h = num_index;
} else {
p->arKey = (char*)(p+1);
memcpy(p->arKey, str_index, str_length);
p->h = zend_inline_hash_func(str_index, str_length);
}
CONNECT_TO_BUCKET_DLLIST(p, ht->arBuckets[p->h & ht->nTableMask]);
ht->arBuckets[p->h & ht->nTableMask] = p;
HANDLE_UNBLOCK_INTERRUPTIONS();
return SUCCESS;
} else {
return FAILURE;
}
}
ZEND_API int zend_hash_sort(HashTable *ht, sort_func_t sort_func,
compare_func_t compar, int renumber TSRMLS_DC)
{
Bucket **arTmp;
Bucket *p;
int i, j;
IS_CONSISTENT(ht);
if (!(ht->nNumOfElements>1) && !(renumber && ht->nNumOfElements>0)) { /* Doesn't require sorting */
return SUCCESS;
}
arTmp = (Bucket **) pemalloc(ht->nNumOfElements * sizeof(Bucket *), ht->persistent);
if (!arTmp) {
return FAILURE;
}
p = ht->pListHead;
i = 0;
while (p) {
arTmp[i] = p;
p = p->pListNext;
i++;
}
(*sort_func)((void *) arTmp, i, sizeof(Bucket *), compar TSRMLS_CC);
HANDLE_BLOCK_INTERRUPTIONS();
ht->pListHead = arTmp[0];
ht->pListTail = NULL;
ht->pInternalPointer = ht->pListHead;
arTmp[0]->pListLast = NULL;
if (i > 1) {
arTmp[0]->pListNext = arTmp[1];
for (j = 1; j < i-1; j++) {
arTmp[j]->pListLast = arTmp[j-1];
arTmp[j]->pListNext = arTmp[j+1];
}
arTmp[j]->pListLast = arTmp[j-1];
arTmp[j]->pListNext = NULL;
} else {
arTmp[0]->pListNext = NULL;
}
ht->pListTail = arTmp[i-1];
pefree(arTmp, ht->persistent);
HANDLE_UNBLOCK_INTERRUPTIONS();
if (renumber) {
p = ht->pListHead;
i=0;
while (p != NULL) {
p->nKeyLength = 0;
p->h = i++;
p = p->pListNext;
}
ht->nNextFreeElement = i;
zend_hash_rehash(ht);
}
return SUCCESS;
}
ZEND_API int zend_hash_compare(HashTable *ht1, HashTable *ht2, compare_func_t compar, zend_bool ordered TSRMLS_DC)
{
Bucket *p1, *p2 = NULL;
int result;
void *pData2;
IS_CONSISTENT(ht1);
IS_CONSISTENT(ht2);
HASH_PROTECT_RECURSION(ht1);
HASH_PROTECT_RECURSION(ht2);
result = ht1->nNumOfElements - ht2->nNumOfElements;
if (result!=0) {
HASH_UNPROTECT_RECURSION(ht1);
HASH_UNPROTECT_RECURSION(ht2);
return result;
}
p1 = ht1->pListHead;
if (ordered) {
p2 = ht2->pListHead;
}
while (p1) {
if (ordered && !p2) {
HASH_UNPROTECT_RECURSION(ht1);
HASH_UNPROTECT_RECURSION(ht2);
return 1; /* That's not supposed to happen */
}
if (ordered) {
if (p1->nKeyLength==0 && p2->nKeyLength==0) { /* numeric indices */
result = p1->h - p2->h;
if (result!=0) {
HASH_UNPROTECT_RECURSION(ht1);
HASH_UNPROTECT_RECURSION(ht2);
return result;
}
} else { /* string indices */
result = p1->nKeyLength - p2->nKeyLength;
if (result!=0) {
HASH_UNPROTECT_RECURSION(ht1);
HASH_UNPROTECT_RECURSION(ht2);
return result;
}
result = memcmp(p1->arKey, p2->arKey, p1->nKeyLength);
if (result!=0) {
HASH_UNPROTECT_RECURSION(ht1);
HASH_UNPROTECT_RECURSION(ht2);
return result;
}
}
pData2 = p2->pData;
} else {
if (p1->nKeyLength==0) { /* numeric index */
if (zend_hash_index_find(ht2, p1->h, &pData2)==FAILURE) {
HASH_UNPROTECT_RECURSION(ht1);
HASH_UNPROTECT_RECURSION(ht2);
return 1;
}
} else { /* string index */
if (zend_hash_quick_find(ht2, p1->arKey, p1->nKeyLength, p1->h, &pData2)==FAILURE) {
HASH_UNPROTECT_RECURSION(ht1);
HASH_UNPROTECT_RECURSION(ht2);
return 1;
}
}
}
result = compar(p1->pData, pData2 TSRMLS_CC);
if (result!=0) {
HASH_UNPROTECT_RECURSION(ht1);
HASH_UNPROTECT_RECURSION(ht2);
return result;
}
p1 = p1->pListNext;
if (ordered) {
p2 = p2->pListNext;
}
}
HASH_UNPROTECT_RECURSION(ht1);
HASH_UNPROTECT_RECURSION(ht2);
return 0;
}
ZEND_API int zend_hash_minmax(const HashTable *ht, compare_func_t compar, int flag, void **pData TSRMLS_DC)
{
Bucket *p, *res;
IS_CONSISTENT(ht);
if (ht->nNumOfElements == 0 ) {
*pData=NULL;
return FAILURE;
}
res = p = ht->pListHead;
while ((p = p->pListNext)) {
if (flag) {
if (compar(&res, &p TSRMLS_CC) < 0) { /* max */
res = p;
}
} else {
if (compar(&res, &p TSRMLS_CC) > 0) { /* min */
res = p;
}
}
}
*pData = res->pData;
return SUCCESS;
}
ZEND_API ulong zend_hash_next_free_element(const HashTable *ht)
{
IS_CONSISTENT(ht);
return ht->nNextFreeElement;
}
#if ZEND_DEBUG
void zend_hash_display_pListTail(const HashTable *ht)
{
Bucket *p;
p = ht->pListTail;
while (p != NULL) {
zend_output_debug_string(0, "pListTail has key %s\n", p->arKey);
p = p->pListLast;
}
}
void zend_hash_display(const HashTable *ht)
{
Bucket *p;
uint i;
if (UNEXPECTED(ht->nNumOfElements == 0)) {
zend_output_debug_string(0, "The hash is empty");
return;
}
for (i = 0; i < ht->nTableSize; i++) {
p = ht->arBuckets[i];
while (p != NULL) {
zend_output_debug_string(0, "%s <==> 0x%lX\n", p->arKey, p->h);
p = p->pNext;
}
}
p = ht->pListTail;
while (p != NULL) {
zend_output_debug_string(0, "%s <==> 0x%lX\n", p->arKey, p->h);
p = p->pListLast;
}
}
#endif
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* indent-tabs-mode: t
* End:
*/
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