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/* Copyright JS Foundation and other contributors, http://js.foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ECMA_PROPERTY_HASHMAP_H
#define ECMA_PROPERTY_HASHMAP_H
/** \addtogroup ecma ECMA
* @{
*
* \addtogroup ecmapropertyhashmap Property hashmap
* @{
*/
/**
* Recommended minimum number of items in a property cache.
*/
#define ECMA_PROPERTY_HASMAP_MINIMUM_SIZE 32
/**
* Property hash.
*/
typedef struct
{
ecma_property_header_t header; /**< header of the property */
uint32_t max_property_count; /**< maximum property count (power of 2) */
uint32_t null_count; /**< number of NULLs in the map */
uint32_t unused_count; /**< number of unused entires in the map */
/*
* The hash is followed by max_property_count ecma_cpointer_t
* compressed pointers and (max_property_count + 7) / 8 bytes
* which stores a flag for each compressed pointer.
*
* If the compressed pointer is equal to ECMA_NULL_POINTER
* - flag is cleared if the entry is NULL
* - flag is set if the entry is deleted
*
* If the compressed pointer is not equal to ECMA_NULL_POINTER
* - flag is cleared if the first entry of a property pair is referenced
* - flag is set if the second entry of a property pair is referenced
*/
} ecma_property_hashmap_t;
/**
* Simple ecma values
*/
typedef enum
{
ECMA_PROPERTY_HASHMAP_DELETE_NO_HASHMAP, /**< object has no hashmap */
ECMA_PROPERTY_HASHMAP_DELETE_HAS_HASHMAP, /**< object has hashmap */
ECMA_PROPERTY_HASHMAP_DELETE_RECREATE_HASHMAP, /**< hashmap should be recreated */
} ecma_property_hashmap_delete_status;
void ecma_property_hashmap_create (ecma_object_t *object_p);
void ecma_property_hashmap_free (ecma_object_t *object_p);
void ecma_property_hashmap_insert (ecma_object_t *object_p, ecma_string_t *name_p,
ecma_property_pair_t *property_pair_p, int property_index);
ecma_property_hashmap_delete_status ecma_property_hashmap_delete (ecma_object_t *object_p, jmem_cpointer_t name_cp,
ecma_property_t *property_p);
#ifndef CONFIG_ECMA_PROPERTY_HASHMAP_DISABLE
ecma_property_t *ecma_property_hashmap_find (ecma_property_hashmap_t *hashmap_p, ecma_string_t *name_p,
jmem_cpointer_t *property_real_name_cp);
#endif /* !CONFIG_ECMA_PROPERTY_HASHMAP_DISABLE */
/**
* @}
* @}
*/
#endif /* !ECMA_PROPERTY_HASHMAP_H */
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