#include "file_array.h"
#include "stdbool.h"

void file_array_free(file_array_t* file_array) {
  	fclose(file_array->fp);
	free(file_array);  
}

file_array_t* file_array_create(char* filename, size_t total_size) {
    file_array_t* file_array = (file_array_t*)malloc(sizeof(file_array_t));

    file_array->fp = fopen(filename, "w+");

    if (file_array == NULL || file_array->fp == NULL) {
        return NULL;
    }

    file_array->init_pos = 0;
    file_array->total_size = total_size;
    return file_array;
}

void file_array_read(file_array_t* file_array) {
    rewind(file_array->fp);
    file_array->init_pos = 0;
}

bool file_array_get(file_array_t* file_array, size_t pos, double *valor) {
	fseek(file_array->fp, pos * sizeof(double), SEEK_SET);
    fread(valor, sizeof(double), 1, file_array->fp);
    return true;
}

bool file_array_save(file_array_t* file_array, size_t pos, double valor) {
	fseek(file_array->fp, pos * sizeof(double), SEEK_SET);
    fwrite(&valor, sizeof(double), 1, file_array->fp);
	return true;
}