/*
##########
#                                                                          
# charCount.cpp
# version 1.00 
# MDJ 1999-05-14
#
# Counts the number of each ASCII
# character (0-255) in a specified
# text file.
#
# Copyright (c) 1999 by
# M. David Johnson
# BDS Software
# P.O. Box 485
# Glenview, IL 60025-0485
# Phone: 847-998-1656
# Fax:   847-657-8359
# Email: mdjohnson@worldnet.att.net
# Web:   http://www.bds-soft.com
# All Rights Reserved
#
##########
*/

// header files
#include <iostream.h>
#include <fstream.h>
#include <string>
#include <cstring>
#include <cstdio>
#include <cstdlib>

int main(int argc, char *argv[]) {

	// Check for command line entry of filename
	FILE *fp;
	if (argc != 2) {
		cout << "\n\nERROR: Filename required on command line!\n\n";
		exit(1);
	}

	// Establish and initialize count array
	// count[0] through count[255] = individual character counts
	// count[256] = total character count
	unsigned long count[257];
	for (long i = 0; i < 257; i++) {
		count[i] = 0;
	}

	// Open file for character counting
	fp = fopen (argv[1], "r");
	if (fp == NULL) {
		cout << "\n\nERROR: Could not open " << argv[1] << "!\n\n";
		exit(1);
	}
	
	// Prepare to begin counting
	cout << "\n\nProgress Counter\n\n";
	char ch;
	unsigned long cct = 0;
	
	// Do the character count
	for (;;) {
		ch = fgetc(fp);
		if (feof(fp) != 0) {
			break;
		}
		cct++;
		if ((cct % 10000) == 0) {
			cout << cct << "\n"; // progress count;
		}
		count[(long) ch]++;		// individual count
		count[256]++;			// total count
	}
	
	// Close the file and open the report file
	fclose(fp);
	FILE *fpR;
	char *rFilename = "report.txt";
	fpR = fopen(rFilename, "w");
	if (fpR == NULL) {
		cout << "\n\nError: Could not open " << rFilename << "\n\n";
		exit(1);
	}
	
	// Output the report to the report file
	for (long j = 0; j < 257; j++) {
		fprintf(fpR, "%i %u \n", j, count[j]);
	}
	
	// Close the report file and indicate completion
	fclose(fpR);
	cout << "\nReport Complete\n\n";

	return(0);
}

/*
##########
#
# end of charCount.cpp
#
##########
*/