/****************************************************************************
 * Copyright (c) 1998 Free Software Foundation, Inc.                        *
 *                                                                          *
 * Permission is hereby granted, free of charge, to any person obtaining a  *
 * copy of this software and associated documentation files (the            *
 * "Software"), to deal in the Software without restriction, including      *
 * without limitation the rights to use, copy, modify, merge, publish,      *
 * distribute, distribute with modifications, sublicense, and/or sell       *
 * copies of the Software, and to permit persons to whom the Software is    *
 * furnished to do so, subject to the following conditions:                 *
 *                                                                          *
 * The above copyright notice and this permission notice shall be included  *
 * in all copies or substantial portions of the Software.                   *
 *                                                                          *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
 * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
 *                                                                          *
 * Except as contained in this notice, the name(s) of the above copyright   *
 * holders shall not be used in advertising or otherwise to promote the     *
 * sale, use or other dealings in this Software without prior written       *
 * authorization.                                                           *
 ****************************************************************************/

/****************************************************************************
 *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
 *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
 ****************************************************************************/


/*
 *	tputs.c
 *		delay_output()
 *		_nc_outch()
 *		tputs()
 *
 */

#include <curses.priv.h>
#include <ctype.h>
#include <term.h>	/* padding_baud_rate, xon_xoff */
#include <termcap.h>	/* ospeed */
#include <tic.h>

MODULE_ID("$Id: lib_tputs.c,v 1.41 1999/10/22 23:31:24 tom Exp $")

char PC;		/* used by termcap library */
speed_t ospeed;		/* used by termcap library */

int _nc_nulls_sent;	/* used by 'tack' program */

static int (*my_outch)(int c) = _nc_outch;

int delay_output(int ms)
{
	T((T_CALLED("delay_output(%d)"), ms));

	if (no_pad_char)
		napms(ms);
	else {
		register int	nullcount;

		nullcount = (ms * _nc_baudrate(ospeed)) / 10000;
		for (_nc_nulls_sent += nullcount; nullcount > 0; nullcount--)
			my_outch(PC);
		if (my_outch == _nc_outch)
			_nc_flush();
	}

	returnCode(OK);
}

int _nc_outch(int ch)
{
#ifdef TRACE
    	_nc_outchars++;
#endif /* TRACE */

	if (SP != 0
	 && SP->_cleanup) {
		char tmp = ch;
		/*
		 * POSIX says write() is safe in a signal handler, but the
		 * buffered I/O is not.
		 */
		write(fileno(NC_OUTPUT), &tmp, 1);
	} else {
		putc(ch, NC_OUTPUT);
	}
	return OK;
}

int putp(const char *string)
{
	return tputs(string, 1, _nc_outch);
}

int tputs(const char *string, int affcnt, int (*outc)(int))
{
bool	always_delay;
bool	normal_delay;
int	number;
#ifdef BSD_TPUTS
int	trailpad;
#endif /* BSD_TPUTS */

#ifdef TRACE
char	addrbuf[32];

	if (_nc_tracing & TRACE_TPUTS)
	{
		if (outc == _nc_outch)
			(void) strcpy(addrbuf, "_nc_outch");
		else
			(void) sprintf(addrbuf, "%p", outc);
		if (_nc_tputs_trace) {
			TR(TRACE_MAXIMUM, ("tputs(%s = %s, %d, %s) called", _nc_tputs_trace, _nc_visbuf(string), affcnt, addrbuf));
		}
		else {
			TR(TRACE_MAXIMUM, ("tputs(%s, %d, %s) called", _nc_visbuf(string), affcnt, addrbuf));
		}
		_nc_tputs_trace = (char *)NULL;
	}
#endif /* TRACE */
	
	if (!VALID_STRING(string))
		return ERR;

	if (cur_term == 0) {
		always_delay = FALSE;
		normal_delay = TRUE;
	} else {
		always_delay = (string == bell) || (string == flash_screen);
		normal_delay =
		 !xon_xoff
		 && padding_baud_rate
#ifdef NCURSES_NO_PADDING
		 && (SP == 0 || !(SP->_no_padding))
#endif
		 && (_nc_baudrate(ospeed) >= padding_baud_rate);
	}

#ifdef BSD_TPUTS
	/*
	 * This ugly kluge deals with the fact that some ancient BSD programs
	 * (like nethack) actually do the likes of tputs("50") to get delays.
	 */
	trailpad = 0;
	if (isdigit(*string)) {
		while (isdigit(*string)) {
			trailpad = trailpad * 10 + (*string - '0');
			string++;
		}
		trailpad *= 10;
		if (*string == '.') {
			string++;
			if (isdigit(*string)) {
				trailpad += (*string - '0');
				string++;
			}
			while (isdigit(*string))
				string++;
		}

		if (*string == '*') {
			trailpad *= affcnt;
			string++;
		}
	}
#endif /* BSD_TPUTS */

	my_outch = outc;	/* redirect delay_output() */
	while (*string) {
		if (*string != '$')
			(*outc)(*string);
		else {
			string++;
			if (*string != '<') {
				(*outc)('$');
				if (*string)
				    (*outc)(*string);
			} else {
				bool mandatory;

				string++;
				if ((!isdigit(*string) && *string != '.') || !strchr(string, '>')) {
					(*outc)('$');
					(*outc)('<');
					continue;
				}

				number = 0;
				while (isdigit(*string)) {
					number = number * 10 + (*string - '0');
					string++;
				}
				number *= 10;
				if (*string == '.') {
					string++;
					if (isdigit(*string)) {
						number += (*string - '0');
						string++;
					}
					while (isdigit(*string))
						string++;
				}

				mandatory = FALSE;
				while (*string == '*' || *string == '/')
				{
					if (*string == '*') {
						number *= affcnt;
						string++;
					}
					else /* if (*string == '/') */ {
						mandatory = TRUE;
						string++;
					}
				}

				if (number > 0
				 && (always_delay
				  || normal_delay
				  || mandatory))
					delay_output(number/10);

			} /* endelse (*string == '<') */
		} /* endelse (*string == '$') */

		if (*string == '\0')
			break;

		string++;
	}

#ifdef BSD_TPUTS
	/*
	 * Emit any BSD-style prefix padding that we've accumulated now.
	 */
	if (trailpad > 0
	 && (always_delay || normal_delay))
		delay_output(trailpad/10);
#endif /* BSD_TPUTS */

	my_outch = _nc_outch;
	return OK;
}