#include <stdio.h>
#include <stdlib.h>

#include "util.h"

int
read_file(char *path, char **output, size_t * read_size)
{
	long 	file_size;
	FILE   *fp;

	fp = fopen(path, "r");
	if (fp == NULL)
		return -1;

	/* get file size */
	if (fseek(fp, 0L, SEEK_END) != 0)
		return -1;

	file_size = ftell(fp);
	if (file_size < 0)
		return -1;

	/* rewind to file start */
	if (fseek(fp, 0L, SEEK_SET) != 0)
		return -1;

	/* create output buffer */
	*output = malloc(sizeof(char) * (file_size + 1));
	if (*output == NULL)
		return -1;

	/* read the file */
	*read_size = fread(*output, sizeof(char), file_size, fp);
	if (*read_size == 0 || ferror(fp) != 0) {
		free(*output);
		return -1;
	}
	/* enforce string termination */
	(*output)[*read_size] = '\0';

	return 0;
}