/* echo -- version two */
/* program to print argument vector to stdout while escaping BEL, tab, backspace and others */
/* mostly SUS compliant */


#include <stdlib.h>
#include <stdio.h>

#include "support.h"


void escape(char c)
    {
    switch(c)
	{
	case 'a':
	    fputc('\a', stdout);
	    break;
	case 'b':
	    fputc('\b', stdout);
	    break;
	case 'c':
	    exit(EXIT_SUCCESS);
	    break;
	case 'f':
	    fputc('\f', stdout);
	    break;
	case 'n':
	    fputc('\n', stdout);
	    break;
	case 'r':
	    fputc('\r', stdout);
	    break;
	case 't':
	    fputc('\t', stdout);
	    break;
	case 'v':
	    fputc('\v', stdout);
	    break;
	case '\\':
	    fputc('\\', stdout);
	    break;
	case '0':
	    break;
	default:
	    fputc('\\', stdout);
	    fputc(c, stdout);
	    break;
	}
    }

int main(int argc, char **argv)
    {
    char esc_state;

    int i, i2;
    

    esc_state = 0;

    i = 1;
    i2 = 0;


    for(; i < argc; i++)
	{
	for(i2 = 0; argv[i][i2] != '\0'; i2++)
	    {
	    if(!esc_state && '\\' == argv[i][i2])
		{
		esc_state = 1;
		}
	    else if(esc_state)
		{
		esc_state = 0;

		escape(argv[i][i2]);
		}
	    else
		{
		fputc(argv[i][i2], stdout);
		}
	    }

	if(esc_state)
	    {
	    esc_state = 0;

	    fputc('\\', stdout);
	    }
	
	if((i + 1) != argc)
	    {
	    fputc(' ', stdout);
	    }
	}
    fputc('\n', stdout);


    exit(EXIT_SUCCESS);
    }