#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <ctype.h>
#include <string.h>
#include <time.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include "fileLoader.h"

struct OpenFile *load_file_to_mem(char *filename)
{
	struct OpenFile *file = NULL;
	file = (struct OpenFile *)
		malloc(sizeof(struct OpenFile));
	int fd = open(filename, O_RDONLY);

	if (fd < 0)
	{
		printf("\n\"%s \" could not open", filename);
		exit(1);
	}

	struct stat statbuf;
	int err = fstat(fd, &statbuf);
	if (err < 0)
	{
		printf("\n\"%s \" could not open", filename);
		exit(2);
	}

	char *filecontents = mmap(NULL, statbuf.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
	if (filecontents == MAP_FAILED)
	{
		printf("Mapping failed");
		exit(3);
	}
	file->fileSize = statbuf.st_size;
	file->fileData = malloc(statbuf.st_size);
	memcpy(file->fileData, filecontents, statbuf.st_size);

	if (err != 0)
	{
		printf("Unmapping failed");
		exit(1);
	}
	close(fd);

	return file;
}