/* Ask user for confirmation to proceed
Based an assembler version confirm.asm. They behaves the same way.
Written because assembler version does not work in Windows 7 64-bit.
see use.txt for more details.
Syntax
======
@echo off
echo Do you really want to do this dangerous thing?
confirm.exe
If ERRORLEVEL 1 GoTo NO
GoTo YES
Note, no parameters or messages go on the confirm command line itself.
Confirm 1.3
Copyright: (c) 2010-2017 Roedy Green, Canadian Mind Products
#101 - 2536 Wark Street
Victoria, BC Canada V8T 4G8
tel:(250) 361-9093
mailto:roedyg@mindprod.com
http://mindprod.com
Compiled as a Windows console App, without precompiled headers.
For Visual C++ Express options see http://mindprod.com/jgloss/cpp.html#COMPILING
Version History:
 1.2 2010-01-30 port the DOS assembler version
 1.3 2012-05-08 allow CONFIRM=Y or CONFIRM=N set override.
*/
/* ==================================== */
// allow getenv,  We won't hurt the master copy.
#define _CRT_SECURE_NO_WARNINGS
#include <stdlib.h>  /* exit, putenv, _splitpath */
#include <stdio.h>   /* fclose, fgetc, printf, remove, rename, setvbuf */
#include <conio.h>   /* getch, putch */
#include <string.h>  /* strlen */
/* ==================================== */
/* P R O T O T Y P E S */
void  banner(void);
void  processResponse ( char response );
int   main (int argc,  char *argv[]);
/* ==================================== */
void processResponse(char response)
{
	/* not echoed because user might hit tab or Enter */
    /* and mess up the screen */
		switch ( response )
		{
		case 'Y':
		case 'y':
			printf("  Yes\r\n");
			exit ( 0 );
		case 'N':
		case 'n':
		case '\x1b' /* Esc */ :
			printf("  No\r\n");
			exit ( 1 );
		default:
			printf("\a");  // beep and keep looping
		}
}
/* ==================================== */
int main(int argc, char *argv[])
{
	char* override = getenv( "confirm" );
	if ( override != NULL && strlen( override ) >= 1 )
	{
		processResponse( override[0] );
	}
	printf( "\r\nHit Y for yes, or N for no.\r\n" );   // prompt user once
	while ( 1 )
	{
		/* loop forever till user enters Y or N */
		processResponse( _getch() );
	}
	// should never get here
	return(2);
}
/* embedded display copyright banner, with shaded splashes. There is no possible syntax error to trigger it. */
void banner(void)
{
	printf("\n" "\xb0\xb1\xb2\xdb" " Confirm 1.3 "  "\xdb\xb2\xb1\xb0"
		"\nFreeware ask user for confirmation command"
		"\nCopyright: (c) 1993-2017 Roedy Green, Canadian Mind Products"
		"\n" "#101 - 2536 Wark Street, Victoria, BC Canada V8T 4G8"
		"\n" "tel:(250) 361-9093   mailto:roedyg@mindprod.com   http://mindprod.com"
		"\n" "May be used freely for non-military use only"
		"\n\n");
}
/* -30- */