Programming

/* 
Desc: The main intent of this program is the function mygetch. This function is
	written to input one character at a time. The input does not await the enter
	key response from the user.
Author: Hemant Borole
Date: 27Jan05 10:06 am
*/

#include <stdio.h>
#include <termios.h>
#include <unistd.h>

#define BUFFSIZE 64		/* Buffer size for input */
/* this function will return immediately after a key is
   pressed. You do not have to wait till the enter key is hit */

int mygetch( ) {

	/* Handles to old and new termios structures */
	struct termios oldt, newt;
	int ch;

	/* store current termios to restore back later */
	tcgetattr( STDIN_FILENO, &oldt );
	newt = oldt;

	/* set to canonical. turn off echo */
	newt.c_lflag &= ~( ICANON | ECHO );
	tcsetattr( STDIN_FILENO, TCSANOW, &newt );

	/* Read the character */
	ch = getchar();

	/* Reset terminal */
	tcsetattr( STDIN_FILENO, TCSANOW, &oldt );
	return ch;
}

/* Main body, to test the mygetch, convert the character immediately
   to upper case. Do not have to wait till user inputs, presses enter
   and then convert to upper case */

int main()	{
	char c = '\0';
	char str[BUFFSIZE];
	char inp[BUFFSIZE];
	int i = 0;

	str[0] = '\0';

	printf("Type q to quit this program or press enter. \n");
	printf("Anyway the program will self kill after %d characters of input\n",BUFFSIZE);
	while ( 1 )	{
		if ( i >= BUFFSIZE ) break;

		c = mygetch();
		if ( c == 'q' || c == '\n' ) break;

		if ( c >='a' && c <='z' )	{
			printf("%c",c-32);
			str[i] = c-32;
		}
		else	{
			printf("%c",c);
			str[i] = c;
		}
		inp[i] = c;
		i++;
	}
	printf("\nYou typed: %s\n",inp);
	printf("\nConverted output: %s\n",str);
}