View the content of a binary file

viewbin.c

#include <stdio.h>
#include <stdlib.h>
void print_buffer(void *, int);
void catbin(char *);

int main(int argc, char **argv) {
	if (argc == 2){ viewbin(argv[1]); }
	else{
		printf("Please type the name of the binary input file!\n");
		printf("Example: viewbin foo.dat \n");
	}

	return 0;
}


void print_buffer(void *buffer, int buffer_size) {
	int i;

	for (i = 0; i < buffer_size; ++i){
		printf("%c", ((char *)buffer)[i]);
	}
	printf("\n");
}


void catbin(char *filename) {
	FILE *fp; /* Pointer to the input binary file. */
	int fileLen; /* File length. */
	char *buffer; /* Buffer for temporary storage. */ 

	/* Openning the input binary file and check if the file exists. */
	if (!(fp = fopen(filename, "rb"))){
		printf("File does not exist!\n");
		exit(-1);
	}

	/* Calculate the length of the input binary file. */
	fseek(fp, 0, SEEK_END);
	fileLen = ftell(fp); /* The current value of the position indicator. */
	fseek(fp, 0, SEEK_SET);

	/* Memory allocation of the buffer. */
	buffer = (char *)malloc(fileLen + 1);

	/* Read the data from the input binary file and store them temporaly to the buffer. */
	fread(buffer, fileLen, 1, fp);
	fclose(fp);

	/* Print the data on the standard output. */
	print_buffer(buffer, fileLen+1);

	/* Free allocated memory of the buffer. */
	free(buffer);
}