//////////////////////////////////////////////////
//		Float_To_Bin.c			//
//Author: Kamesh Ramani.			//
//Function: Reads the floating point from a file//
//converts to binary and writes back to a file	//
//Binary format:				//
//	1. One bit - sign			//
//	2. Eight bits - Integer part		//
//	3. Seven bits - Floating part		//
//	4. Eighteen bits - Total		//
//////////////////////////////////////////////////


//Library declaration
#include <stdio.h>
#include <math.h>
#include <stdlib.h>

#define SIGN_BITS 1
#define INTEGER_BITS 8
#define FLOAT_BITS 7

void PrintArray(int array[SIGN_BITS + INTEGER_BITS + FLOAT_BITS]);

int main(int argc, char *argv[])
{
	double Float_No = 0.0;
	int Bin_No[SIGN_BITS + INTEGER_BITS + FLOAT_BITS];
	int i = 0;
	int j = 0;	
	FILE *fp1, *fp2;
	
	//Check to see if two arguments are presents
	if (argc != 3)
	{
		printf("Usage: <Input_File> <Output_File>\n");
		exit(1);
	}
	
	//Open file <Input_File> to read floating point values
	if ((fp1=fopen(argv[1],"rt"))=='\0')
	{
		printf("Error opening Input file: %s", argv[2]);
		exit(1);
	}
	
	//Open file <Output_File> to write the binary equivalent
	if ((fp2=fopen(argv[2],"wt"))=='\0')
	{
		printf("Error opeing Output file: %s", argv[3]);
		exit(1);
	}

	for (i = 0; i <= (SIGN_BITS + INTEGER_BITS + FLOAT_BITS)-1; i++)
		Bin_No[i] = 0; 

	while (!feof(fp1))
	{
		fscanf(fp1, "%lf", &Float_No);
		
		fprintf(fp2, "%d. ", j);
		fprintf(fp2, "%lf => ", Float_No); 

		if (Float_No < 0)
		{
			Bin_No[(SIGN_BITS + INTEGER_BITS + FLOAT_BITS) - SIGN_BITS] = 1;
			Float_No = 0 - Float_No;
		}

		if (Float_No >= 1)
			Bin_No[FLOAT_BITS] = 1;
		else
			Bin_No[FLOAT_BITS] = 0;

		for (i = (FLOAT_BITS+1); i <= (INTEGER_BITS + FLOAT_BITS-1); i++)
			Bin_No[i] = 0;  	

		if (Float_No >= 1)
			Float_No = Float_No - 1;
	
		for(i = (FLOAT_BITS-1); i >= 0; i--)
		{
			Float_No = Float_No * 2.0;

			if (Float_No >= 1)
			 {
				Float_No = Float_No - 1.0;
				Bin_No[i] = 1;
			 }
			 else Bin_No[i] = 0;
		}
	
		// Printing x0
		fprintf(fp2,"(");
		for(i = (SIGN_BITS + INTEGER_BITS + FLOAT_BITS) -1; i >= 0; i--)
		{
			if ((i==14) || (i==6)) fprintf(fp2," ");
			fprintf(fp2,"%d",Bin_No[i]);
		}		
		fprintf(fp2,")");
		fprintf(fp2,"\n");
		j++;
	}
	return 0;
}

//Print the elements of the array
void PrintArray(int array[SIGN_BITS + INTEGER_BITS + FLOAT_BITS])
{
        int x=0;
        
        printf("Printing Array\n"); 
        for (x = (SIGN_BITS + INTEGER_BITS + FLOAT_BITS)-1; x >= 0; x--)
        {
		if ((x==14) || (x==6))
			printf(" ");
		printf("%d", array[x]);
	}
	printf("\n");
        x = 0;
        printf("Completed Printing\n");
}