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/**
* \file vector.c
* \brief fpga metrics vector
*/

#include "vector.h"
#include "opae/access.h"
#include "opae/utils.h"
#include "opae/manage.h"
#include "opae/enum.h"
#include "opae/properties.h"
#include "common_int.h"

#define FPGA_VECTOR_CAPACITY     20

fpga_result fpga_vector_init(fpga_metric_vector *vector)
{
	fpga_result result = FPGA_OK;

	if (vector == NULL)
		return FPGA_INVALID_PARAM;

	vector->capacity = FPGA_VECTOR_CAPACITY;
	vector->total = 0;
	vector->fpga_metric_item = malloc(sizeof(void *) * vector->capacity);

	if (vector->fpga_metric_item == NULL)
		return FPGA_NO_MEMORY;

	return result;
}

fpga_result fpga_vector_free(fpga_metric_vector *vector)
{
	fpga_result result = FPGA_OK;
	uint64_t i = 0;
	if (vector == NULL) {
		OPAE_ERR("Invalid parm");
		return FPGA_INVALID_PARAM;
	}
	for (i = 0; i < vector->total; i++) {
		if (vector->fpga_metric_item[i]) {
			free(vector->fpga_metric_item[i]);
			vector->fpga_metric_item[i] = NULL;
		}
	}
	if (vector->fpga_metric_item)
		free(vector->fpga_metric_item);

	vector->fpga_metric_item = NULL;

	return result;
}

fpga_result fpga_vector_total(fpga_metric_vector *vector, uint64_t *total)
{

	if (vector == NULL ||
		total == NULL) {
		OPAE_ERR("Invalid parm");
		return FPGA_EXCEPTION;
	}
	*total =  vector->total;

	return FPGA_OK;
}

fpga_result fpga_vector_resize(fpga_metric_vector *vector, uint64_t capacity)
{
	fpga_result result = FPGA_OK;

	if (vector == NULL) {
		OPAE_ERR("Invalid parm");
		return FPGA_INVALID_PARAM;
	}

	void **fpga_metric_item = realloc(vector->fpga_metric_item, sizeof(void *) * capacity);

	if (fpga_metric_item == NULL) {
		OPAE_ERR("Invalid parm");
		return FPGA_NO_MEMORY;
	}

	if (fpga_metric_item) {
		vector->fpga_metric_item = fpga_metric_item;
		vector->capacity = capacity;
	}
	return result;
}

fpga_result fpga_vector_push(fpga_metric_vector *vector, void *fpga_metric_item)
{
	fpga_result result = FPGA_OK;

	if ((vector == NULL) ||
		(fpga_metric_item == NULL)) {
		OPAE_ERR("Invalid parm");
		return FPGA_INVALID_PARAM;
	}

	if (vector->capacity == vector->total) {

		result = fpga_vector_resize(vector, vector->capacity * 2);
		if (result != FPGA_OK)
			return result;
	}
	vector->fpga_metric_item[vector->total++] = fpga_metric_item;


	return result;
}


fpga_result fpga_vector_delete(fpga_metric_vector *vector, uint64_t index)
{
	fpga_result result = FPGA_OK;
	uint64_t i = 0;

	if (vector == NULL) {
		OPAE_ERR("Invalid parm");
		return FPGA_INVALID_PARAM;
	}
	if (index >= vector->total)
		return FPGA_INVALID_PARAM;

	if (vector->fpga_metric_item[index])
		free(vector->fpga_metric_item[index]);

	vector->fpga_metric_item[index] = NULL;

	for (i = index; i < vector->total - 1; i++) {
		vector->fpga_metric_item[i] = vector->fpga_metric_item[i + 1];
		vector->fpga_metric_item[i + 1] = NULL;
	}

	vector->total--;

	if (vector->total > 0 && vector->total == vector->capacity / 4)
		fpga_vector_resize(vector, vector->capacity / 2);

	return result;
}

void *fpga_vector_get(fpga_metric_vector *vector, uint64_t index)
{
	if (vector == NULL) {
		OPAE_ERR("Invalid parm");
		return NULL;
	}

	if (index < vector->total)
		return vector->fpga_metric_item[index];
	return NULL;
}