src/hash/value.c

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#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>

#include "class.h"
#include "utils/hash.h"
#include "utils/memory.h"
#include "commons.h"

#include "hash/value.h"
#include "hash/interface/hashable.h"

static
int
hashValueCtor(void * _this, va_list * params)
{
        HashValue this = _this;
        char * key     = va_arg(* params, char*);
        void * value;
        
        this->nkey   = va_arg(* params, size_t);
        value        = va_arg(* params, void*);
        this->nvalue = va_arg(* params, size_t);

        this->key = malloc(this->nkey + 1);
        this->key[this->nkey] = 0;
        memcpy(this->key, key, this->nkey);

        this->hash = sdbm((unsigned char *)this->key, this->nkey);

        if (NULL != value) {
                this->value = malloc(this->nvalue + 1);
                ((char*)this->value)[this->nvalue] = 0;
                memcpy(this->value, value, this->nvalue);
        }

        return 0;
}

static
void
hashValueDtor(void * _this)
{
        HashValue this = _this;

        FREE(this->key);
        FREE(this->value);
}

static
unsigned long
hashValueGetHash(void * _this)
{
        HashValue this = _this;

        return this->hash;
}

static
void
hashValueHandleDouble(void * _this, void * _double)
{
        HashValue this = _this;
        HashValue doub = _double;
        void * tmp_value;
        size_t tmp_nvalue;

        tmp_value   = this->value;
        this->value = doub->value;
        doub->value = tmp_value;

        tmp_nvalue   = this->nvalue;
        this->nvalue = doub->nvalue;
        doub->nvalue = tmp_nvalue;
}

INIT_IFACE(Class, hashValueCtor, hashValueDtor, NULL);
INIT_IFACE(Hashable, hashValueGetHash, hashValueHandleDouble);
CREATE_CLASS(HashValue, NULL, IFACE(Class), IFACE(Hashable));

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