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zend_hash.h
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zend_hash.h
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/*
+----------------------------------------------------------------------+
| Zend Engine |
+----------------------------------------------------------------------+
| Copyright (c) 1998, 1999 Andi Gutmans, Zeev Suraski |
+----------------------------------------------------------------------+
| This source file is subject to the Zend license, that is bundled |
| with this package in the file LICENSE. If you did not receive a |
| copy of the Zend license, please mail us at zend@zend.com so we can |
| send you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Andi Gutmans <andi@zend.com> |
| Zeev Suraski <zeev@zend.com> |
+----------------------------------------------------------------------+
*/
#ifndef _HASH_
#define _HASH_
#include <sys/types.h>
#define HASH_KEY_IS_STRING 1
#define HASH_KEY_IS_LONG 2
#define HASH_KEY_NON_EXISTANT 3
#define HASH_UPDATE (1<<0)
#define HASH_ADD (1<<1)
#define HASH_NEXT_INSERT (1<<2)
#define HASH_ADD_PTR (1<<3)
#define HASH_DEL_KEY 0
#define HASH_DEL_INDEX 1
struct hashtable;
typedef struct bucket {
ulong h; /* Used for numeric indexing */
uint nKeyLength;
void *pData;
void *pDataPtr;
char bIsPointer;
struct bucket *pListNext;
struct bucket *pListLast;
struct bucket *pNext;
char arKey[1]; /* Must be last element */
} Bucket;
typedef struct hashtable {
uint nTableSize;
uint nHashSizeIndex;
uint nNumOfElements;
ulong nNextFreeElement;
ulong(*pHashFunction) (char *arKey, uint nKeyLength);
Bucket *pInternalPointer; /* Used for element traversal */
Bucket *pListHead;
Bucket *pListTail;
Bucket **arBuckets;
void (*pDestructor) (void *pData);
unsigned char persistent;
} HashTable;
/* startup/shutdown */
ZEND_API int zend_hash_init(HashTable *ht, uint nSize, ulong(*pHashFunction) (char *arKey, uint nKeyLength), void (*pDestructor) (void *pData), int persistent);
ZEND_API void zend_hash_destroy(HashTable *ht);
ZEND_API void zend_hash_clean(HashTable *ht);
/* additions/updates/changes */
ZEND_API int zend_hash_add_or_update(HashTable *ht, char *arKey, uint nKeyLength, void *pData, uint nDataSize, void **pDest,int flag);
#define zend_hash_update(ht,arKey,nKeyLength,pData,nDataSize,pDest) \
zend_hash_add_or_update(ht,arKey,nKeyLength,pData,nDataSize,pDest,HASH_UPDATE)
#define zend_hash_add(ht,arKey,nKeyLength,pData,nDataSize,pDest) \
zend_hash_add_or_update(ht,arKey,nKeyLength,pData,nDataSize,pDest,HASH_ADD)
#define zend_hash_update_ptr(ht,arKey,nKeyLength,pData,nDataSize,pDest) \
zend_hash_add_or_update(ht,arKey,nKeyLength,pData,0,pDest,(HASH_UPDATE|HASH_ADD_PTR))
ZEND_API int zend_hash_quick_add_or_update(HashTable *ht, char *arKey, uint nKeyLength, ulong h, void *pData, uint nDataSize, void **pDest,int flag);
#define zend_hash_quick_update(ht,arKey,nKeyLength,h,pData,nDataSize,pDest) \
zend_hash_quick_add_or_update(ht,arKey,nKeyLength,h,pData,nDataSize,pDest,HASH_UPDATE)
#define zend_hash_quick_add(ht,arKey,nKeyLength,h,pData,nDataSize,pDest) \
zend_hash_quick_add_or_update(ht,arKey,nKeyLength,h,pData,nDataSize,pDest,HASH_ADD)
#define zend_hash_quick_update_ptr(ht,arKey,nKeyLength,h,pData,nDataSize,pDest) \
zend_hash_quick_add_or_update(ht,arKey,nKeyLength,h,pData,0,pDest,HASH_UPDATE|HASH_ADD_PTR)
ZEND_API int zend_hash_index_update_or_next_insert(HashTable *ht, ulong h, void *pData, uint nDataSize, void **pDest, int flag);
#define zend_hash_index_update(ht,h,pData,nDataSize,pDest) \
zend_hash_index_update_or_next_insert(ht,h,pData,nDataSize,pDest,HASH_UPDATE)
#define zend_hash_next_index_insert(ht,pData,nDataSize,pDest) \
zend_hash_index_update_or_next_insert(ht,0,pData,nDataSize,pDest,HASH_NEXT_INSERT)
#define zend_hash_next_index_insert_ptr(ht,pData,nDataSize,pDest) \
zend_hash_index_update_or_next_insert(ht,0,pData,nDataSize,pDest,HASH_NEXT_INSERT|HASH_ADD_PTR)
ZEND_API int zend_hash_pointer_update(HashTable *ht, char *arKey, uint nKeyLength, void *pData);
ZEND_API int zend_hash_pointer_index_update_or_next_insert(HashTable *ht, ulong h, void *pData, int flag);
#define zend_hash_pointer_index_update(ht,h,pData) \
zend_hash_pointer_index_update_or_next_insert(ht,h,pData,HASH_UPDATE)
#define zend_hash_next_index_pointer_insert(ht,pData) \
zend_hash_pointer_index_update_or_next_insert(ht,0,pData,HASH_NEXT_INSERT)
ZEND_API void zend_hash_apply(HashTable *ht,int (*destruct) (void *));
ZEND_API void zend_hash_apply_with_argument(HashTable *ht,int (*destruct) (void *, void *), void *);
/* Deletes */
ZEND_API int zend_hash_del_key_or_index(HashTable *ht, char *arKey, uint nKeyLength, ulong h, int flag);
#define zend_hash_del(ht,arKey,nKeyLength) \
zend_hash_del_key_or_index(ht,arKey,nKeyLength,0,HASH_DEL_KEY)
#define zend_hash_index_del(ht,h) \
zend_hash_del_key_or_index(ht,NULL,0,h,HASH_DEL_INDEX)
ZEND_API ulong zend_get_hash_value(HashTable *ht, char *arKey, uint nKeyLength);
/* Data retreival */
ZEND_API int zend_hash_find(HashTable *ht, char *arKey, uint nKeyLength, void **pData);
ZEND_API int zend_hash_quick_find(HashTable *ht, char *arKey, uint nKeyLength, ulong h, void **pData);
ZEND_API int zend_hash_index_find(HashTable *ht, ulong h, void **pData);
/* Misc */
ZEND_API int zend_hash_exists(HashTable *ht, char *arKey, uint nKeyLength);
ZEND_API int zend_hash_index_exists(HashTable *ht, ulong h);
ZEND_API int zend_hash_is_pointer(HashTable *ht, char *arKey, uint nKeyLength);
ZEND_API int zend_hash_index_is_pointer(HashTable *ht, ulong h);
ZEND_API ulong zend_hash_next_free_element(HashTable *ht);
/* traversing */
ZEND_API void zend_hash_move_forward(HashTable *ht);
ZEND_API void zend_hash_move_backwards(HashTable *ht);
ZEND_API int zend_hash_get_current_key(HashTable *ht, char **str_index, ulong *num_index);
ZEND_API int zend_hash_get_current_data(HashTable *ht, void **pData);
ZEND_API void zend_hash_internal_pointer_reset(HashTable *ht);
ZEND_API void zend_hash_internal_pointer_end(HashTable *ht);
/* Copying, merging and sorting */
ZEND_API void zend_hash_copy(HashTable *target, HashTable *source, void (*pCopyConstructor) (void *pData), void *tmp, uint size);
ZEND_API void zend_hash_merge(HashTable *target, HashTable *source, void (*pCopyConstructor) (void *pData), void *tmp, uint size);
ZEND_API int zend_hash_sort(HashTable *ht, int (*compar) (const void *, const void *), int renumber);
ZEND_API int zend_hash_minmax(HashTable *ht, int (*compar) (const void *, const void *), int flag, void **pData);
ZEND_API int zend_hash_num_elements(HashTable *ht);
ZEND_API ulong hashpjw(char *arKey, uint nKeyLength);
#if DEBUG
/* debug */
void zend_hash_display_pListTail(HashTable *ht);
void zend_hash_display(HashTable *ht);
#endif
#endif /* _HASH_ */