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/**
** @file mruby/hash.h - Hash class
**
** See Copyright Notice in mruby.h
*/
#ifndef
MRUBY_HASH_H
#define
MRUBY_HASH_H
#include
"common.h"
/**
* Hash class
*/
MRB_BEGIN_DECL
/* offset of `iv` must match struct RObject */
struct
RHash
{
MRB_OBJECT_HEADER
;
#ifdef
MRB_64BIT
uint32_t
size
;
struct
iv_tbl
*
iv
;
uint32_t
ea_capa
;
uint32_t
ea_n_used
;
#else
struct
iv_tbl
*
iv
;
uint32_t
size
;
#endif
union
{
struct
hash_entry
*
ea
;
struct
hash_table
*
ht
;
}
hsh
;
};
#define
mrb_hash_ptr
(
v
) ((struct RHash*)(mrb_ptr(v)))
#define
mrb_hash_value
(
p
) mrb_obj_value((void*)(p))
MRB_API
mrb_value
mrb_hash_new_capa
(
mrb_state
*
mrb
,
mrb_int
capa
);
/*
* Initializes a new hash.
*
* Equivalent to:
*
* Hash.new
*
* @param mrb The mruby state reference.
* @return The initialized hash.
*/
MRB_API
mrb_value
mrb_hash_new
(
mrb_state
*
mrb
);
/*
* Sets a keys and values to hashes.
*
* Equivalent to:
*
* hash[key] = val
*
* @param mrb The mruby state reference.
* @param hash The target hash.
* @param key The key to set.
* @param val The value to set.
* @return The value.
*/
MRB_API
void
mrb_hash_set
(
mrb_state
*
mrb
,
mrb_value
hash
,
mrb_value
key
,
mrb_value
val
);
/*
* Gets a value from a key. If the key is not found, the default of the
* hash is used.
*
* Equivalent to:
*
* hash[key]
*
* @param mrb The mruby state reference.
* @param hash The target hash.
* @param key The key to get.
* @return The found value.
*/
MRB_API
mrb_value
mrb_hash_get
(
mrb_state
*
mrb
,
mrb_value
hash
,
mrb_value
key
);
/*
* Gets a value from a key. If the key is not found, the default parameter is
* used.
*
* Equivalent to:
*
* hash.key?(key) ? hash[key] : def
*
* @param mrb The mruby state reference.
* @param hash The target hash.
* @param key The key to get.
* @param def The default value.
* @return The found value.
*/
MRB_API
mrb_value
mrb_hash_fetch
(
mrb_state
*
mrb
,
mrb_value
hash
,
mrb_value
key
,
mrb_value
def
);
/*
* Deletes hash key and value pair.
*
* Equivalent to:
*
* hash.delete(key)
*
* @param mrb The mruby state reference.
* @param hash The target hash.
* @param key The key to delete.
* @return The deleted value. This value is not protected from GC. Use `mrb_gc_protect()` if necessary.
*/
MRB_API
mrb_value
mrb_hash_delete_key
(
mrb_state
*
mrb
,
mrb_value
hash
,
mrb_value
key
);
/*
* Gets an array of keys.
*
* Equivalent to:
*
* hash.keys
*
* @param mrb The mruby state reference.
* @param hash The target hash.
* @return An array with the keys of the hash.
*/
MRB_API
mrb_value
mrb_hash_keys
(
mrb_state
*
mrb
,
mrb_value
hash
);
/*
* Check if the hash has the key.
*
* Equivalent to:
*
* hash.key?(key)
*
* @param mrb The mruby state reference.
* @param hash The target hash.
* @param key The key to check existence.
* @return True if the hash has the key
*/
MRB_API
mrb_bool
mrb_hash_key_p
(
mrb_state
*
mrb
,
mrb_value
hash
,
mrb_value
key
);
/*
* Check if the hash is empty
*
* Equivalent to:
*
* hash.empty?
*
* @param mrb The mruby state reference.
* @param self The target hash.
* @return True if the hash is empty, false otherwise.
*/
MRB_API
mrb_bool
mrb_hash_empty_p
(
mrb_state
*
mrb
,
mrb_value
self
);
/*
* Gets an array of values.
*
* Equivalent to:
*
* hash.values
*
* @param mrb The mruby state reference.
* @param hash The target hash.
* @return An array with the values of the hash.
*/
MRB_API
mrb_value
mrb_hash_values
(
mrb_state
*
mrb
,
mrb_value
hash
);
/*
* Clears the hash.
*
* Equivalent to:
*
* hash.clear
*
* @param mrb The mruby state reference.
* @param hash The target hash.
* @return The hash
*/
MRB_API
mrb_value
mrb_hash_clear
(
mrb_state
*
mrb
,
mrb_value
hash
);
/*
* Get hash size.
*
* Equivalent to:
*
* hash.size
*
* @param mrb The mruby state reference.
* @param hash The target hash.
* @return The hash size.
*/
MRB_API
mrb_int
mrb_hash_size
(
mrb_state
*
mrb
,
mrb_value
hash
);
/*
* Copies the hash. This function does NOT copy the instance variables
* (except for the default value). Use mrb_obj_dup() to copy the instance
* variables as well.
*
* @param mrb The mruby state reference.
* @param hash The target hash.
* @return The copy of the hash
*/
MRB_API
mrb_value
mrb_hash_dup
(
mrb_state
*
mrb
,
mrb_value
hash
);
/*
* Merges two hashes. The first hash will be modified by the
* second hash.
*
* @param mrb The mruby state reference.
* @param hash1 The target hash.
* @param hash2 Updating hash
*/
MRB_API
void
mrb_hash_merge
(
mrb_state
*
mrb
,
mrb_value
hash1
,
mrb_value
hash2
);
#define
RHASH
(
hash
) ((struct RHash*)(mrb_ptr(hash)))
#define
MRB_HASH_IB_BIT_BIT
5
#define
MRB_HASH_AR_EA_CAPA_BIT
5
#define
MRB_HASH_IB_BIT_SHIFT
0
#define
MRB_HASH_AR_EA_CAPA_SHIFT
0
#define
MRB_HASH_AR_EA_N_USED_SHIFT
MRB_HASH_AR_EA_CAPA_BIT
#define
MRB_HASH_SIZE_FLAGS_SHIFT
(MRB_HASH_AR_EA_CAPA_BIT * 2)
#define
MRB_HASH_IB_BIT_MASK
((1 << MRB_HASH_IB_BIT_BIT) - 1)
#define
MRB_HASH_AR_EA_CAPA_MASK
((1 << MRB_HASH_AR_EA_CAPA_BIT) - 1)
#define
MRB_HASH_AR_EA_N_USED_MASK
(MRB_HASH_AR_EA_CAPA_MASK << MRB_HASH_AR_EA_N_USED_SHIFT)
#define
MRB_HASH_DEFAULT
(1 << (MRB_HASH_SIZE_FLAGS_SHIFT + 0))
#define
MRB_HASH_PROC_DEFAULT
(1 << (MRB_HASH_SIZE_FLAGS_SHIFT + 1))
#define
MRB_HASH_HT
(1 << (MRB_HASH_SIZE_FLAGS_SHIFT + 2))
#define
MRB_RHASH_DEFAULT_P
(
hash
) (RHASH(hash)->flags & MRB_HASH_DEFAULT)
#define
MRB_RHASH_PROCDEFAULT_P
(
hash
) (RHASH(hash)->flags & MRB_HASH_PROC_DEFAULT)
/* return non zero to break the loop */
typedef
int
(
mrb_hash_foreach_func
)(
mrb_state
*
mrb
,
mrb_value
key
,
mrb_value
val
,
void
*
data
);
MRB_API
void
mrb_hash_foreach
(
mrb_state
*
mrb
,
struct
RHash
*
hash
,
mrb_hash_foreach_func
*
func
,
void
*
p
);
MRB_END_DECL
#endif
/* MRUBY_HASH_H */
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