/*
 * file-read.c
 * 
 * Simple program to read in an entire file into buffer 
 * using malloc after determining filesize using fstat.
 * 
 * gcc -Wall file-read.c -o file-reader
 * 
 */
 
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <inttypes.h>
 
#define FILENAME "mylargefile.txt"
 
int main(int argc, char **argv)
{
	struct stat file_status;
 
	if(stat(FILENAME, &file_status) != 0){
		perror("ERROR: Could not stat or file does not exist");
	}
	printf("Filesize: %s\n\n",FILENAME);
	printf("b  %9jd \n", ((intmax_t)file_status.st_size));
	printf("Kb %9jd \n", ((intmax_t)file_status.st_size) / 1024);
	printf("Mb %9jd \n", (((intmax_t)file_status.st_size) / 1024) / 1024);
	printf("Gb %9jd \n", ((((intmax_t)file_status.st_size) / 1024)/ 1024)/ 1024);
 
	FILE *fp = fopen (FILENAME, "r");
 
	char *buffer = NULL;
	buffer = (char *) malloc(file_status.st_size+1); // + null terminator
 
	if (!fread(buffer, file_status.st_size,1,fp)) { 
        perror("ERROR: Could not read file");
    } 
    buffer[file_status.st_size+1] = '\0'; 
 
	printf("%s\n",buffer);
 
	fclose(fp);
	free(buffer);
 
	return 0;
}