hash.h - Online Linux Manual PageSection : 3
Updated : Mon Jan 25 2021
Source : Version 4.0.0
Note : Coin

NAMEhash.h

SYNOPSIS
#include <stdlib​.h>
#include <Inventor/C/basic​.h>

Typedefstypedef uintptr_t cc_hash_key
typedef struct cc_hash cc_hash
typedef cc_hash_key cc_hash_func(const cc_hash_key key)
typedef void cc_hash_apply_func(cc_hash_key key, void *val, void *closure)

Functionscc_hash * cc_hash_construct (unsigned int size, float loadfactor)
void cc_hash_destruct (cc_hash *ht)
void cc_hash_clear (cc_hash *ht)
SbBool cc_hash_put (cc_hash *ht, cc_hash_key key, void *val)
SbBool cc_hash_get (cc_hash *ht, cc_hash_key key, void **val)
SbBool cc_hash_remove (cc_hash *ht, cc_hash_key key)
void cc_hash_apply (cc_hash *ht, cc_hash_apply_func *func, void *closure)
unsigned int cc_hash_get_num_elements (cc_hash *ht)
void cc_hash_set_hash_func (cc_hash *ht, cc_hash_func *func)
void cc_hash_print_stat (cc_hash *ht)

Typedef Documentation

uintptr_t cc_hash_keyThe type definition used locally for a hash key​.

struct cc_hash cc_hashThe type definition for the cc_hash structure​.

cc_hash_key cc_hash_funcA type definition for cc_hash_func function pointers​.

void cc_hash_apply_funcA type definition for cc_hash_apply_func function pointers​.

Function Documentation

cc_hash* cc_hash_construct (unsigned int size, float loadfactor)Construct a hash table​. size is the initial bucket size​. The caller need not attempt to find a good (prime number) value for this argument to ensure good hashing​. That will be taken care of internally​. loadfactor is the percentage the table should be filled before resizing, and should be a number from 0 to 1​. It is of course possible to specify a number bigger than 1, but then there will be greater chance of having many elements on the same bucket (linear search for an element)​. If you supply a number <= 0 for loadfactor, the default value 0​.75 will be used​.

void cc_hash_destruct (cc_hash * ht)Destruct the hash table ht​.

void cc_hash_clear (cc_hash * ht)Clear/remove all elements in the hash table ht​.

SbBool cc_hash_put (cc_hash * ht, cc_hash_key key, void * val)Insert a new element in the hash table ht​. key is the key used to identify the element, while val is the element value​. If key is already used by another element, the element value will be overwritten, and FALSE is returned​. Otherwise a new element is created and TRUE is returned​.

SbBool cc_hash_get (cc_hash * ht, cc_hash_key key, void ** val)Find the element with key value key​. If found, the value is written to val, and TRUE is returned​. Otherwise FALSE is returned and val is not changed​.

SbBool cc_hash_remove (cc_hash * ht, cc_hash_key key)Attempt to remove the element with key value key​. Returns TRUE if found, FALSE otherwise​.

void cc_hash_apply (cc_hash * ht, cc_hash_apply_func * func, void * closure)Call func for for each element in the hash table​.

unsigned int cc_hash_get_num_elements (cc_hash * ht)Return the number of elements in the hash table​.

void cc_hash_set_hash_func (cc_hash * ht, cc_hash_func * func)Set the hash func that is used to map key values into a bucket index​.

void cc_hash_print_stat (cc_hash * ht)For debugging only​. Prints information about hash with cc_debugerror​.

AuthorGenerated automatically by Doxygen for Coin from the source code​.
0
Johanes Gumabo
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