/*	$Id: msg_prmp.c 1200 2006-06-12 04:55:42Z blairdude $

	Performs an user prompt

	Display prompt (if any), get user input via vcgetchar(),
	map key to metakey, return metakey if valid.

	$Log$
	Revision 1.4  2006/06/12 04:55:42  blairdude
	All putchar's now use outc which first flushes stdout and then uses write to write the character to the console.  Some potential bugs have been fixed ( Special thanks to Arkady for noticing them :-) ).  All CONIO dependencies have now been removed and replaced with size-optimized functions (for example, mycprintf, simply opens "CON" and directly writes to the console that way, and mywherex and mywherey use MK_FP to access memory and find the cursor position).  FreeCOM is now
	significantly smaller.

	Revision 1.3  2006/06/11 02:47:05  blairdude
	
	
	Optimized FreeCOM for size, fixed LFN bugs, and started an int 2e handler (which safely fails at the moment)
	
	Revision 1.2  2004/02/01 13:52:17  skaus
	add/upd: CVS $id$ keywords to/of files
	
	Revision 1.1  2001/04/12 00:33:53  skaus
	chg: new structure
	chg: If DEBUG enabled, no available commands are displayed on startup
	fix: PTCHSIZE also patches min extra size to force to have this amount
	   of memory available on start
	bugfix: CALL doesn't reset options
	add: PTCHSIZE to patch heap size
	add: VSPAWN, /SWAP switch, .SWP resource handling
	bugfix: COMMAND.COM A:\
	bugfix: CALL: if swapOnExec == ERROR, no change of swapOnExec allowed
	add: command MEMORY
	bugfix: runExtension(): destroys command[-2]
	add: clean.bat
	add: localized CRITER strings
	chg: use LNG files for hard-coded strings (hangForEver(), init.c)
		via STRINGS.LIB
	add: DEL.C, COPY.C, CBREAK.C: STRINGS-based prompts
	add: fixstrs.c: prompts & symbolic keys
	add: fixstrs.c: backslash escape sequences
	add: version IDs to DEFAULT.LNG and validation to FIXSTRS.C
	chg: splitted code apart into LIB\*.c and CMD\*.c
	bugfix: IF is now using error system & STRINGS to report errors
	add: CALL: /N
	
 */

#include "../config.h"

#include <assert.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "../include/misc.h"

int userprompt(unsigned id,...)
{
	char *fmt, *str;
	int ch;

	if(!getPromptString(id, &str, &fmt))
		return 0;

	/* Issue message */
	if(*fmt) {
		va_list ap;

		va_start(ap, id);
		vprintf(fmt, ap);
		va_end(ap);
	}

	while((ch = vcgetchar()) == 0 || (ch = mapMetakey(str, ch)) == 0)
		beep();                     /* hit erroreous character */

	outc('\n');                /* advance to next line */
	freePromptString(str, fmt);

	return ch;
}
