/* $NetBSD: curterm.c,v 1.14 2020/05/30 16:03:58 roy Exp $ */

/*
 * Copyright (c) 2009, 2011 The NetBSD Foundation, Inc.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Roy Marples.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <sys/cdefs.h>
#include <assert.h>
#include <stdlib.h>
#include <string.h>
#include <termios.h>
#include <stdio.h>
#include <term_private.h>
#include <term.h>

TERMINAL *cur_term;

/*
 * There is no standard way of getting a list of aliases for the
 * terminal. However, some applications such as telnet want to know this.
 * ncurses dumps the terminfo header into an undefined variable ttytype
 * and these applications then parse it to work out the aliases.
 * We should do the same for now, until a standard mechanism for getting
 * the information is available or the need for it goes away.
 */
#define NAMESIZE 256
char ttytype[NAMESIZE];

static const speed_t bauds[] = {
  0,    50,   75,   110,   134,   150,   200,    300,    600,    1200,
  2400, 4800, 9600, 19200, 38400, 57600, 115200, 230400, 460800, 921600};

void _ti_setospeed(TERMINAL *term) {
  struct termios termios;
  speed_t os;
  size_t i;

  _DIAGASSERT(term != NULL);

  term->_ospeed = 0;
  if (tcgetattr(term->fildes, &termios) == 0) {
    os = cfgetospeed(&termios);
    for (i = 0; i < __arraycount(bauds); i++)
      if (bauds[i] == os) {
        term->_ospeed = (short)i;
        break;
      }
  }
}

TERMINAL *set_curterm(TERMINAL *nterm) {
  TERMINAL *oterm;
  size_t l, n;
  char *p;

  oterm = cur_term;
  cur_term = nterm;

  ospeed = 0;
  if (cur_term == NULL)
    PC = '\0';
  else {
    if (pad_char == NULL)
      PC = '\0';
    else
      PC = *pad_char;
    _ti_setospeed(nterm);
    ospeed = nterm->_ospeed;

    p = ttytype;
    l = sizeof(ttytype);
    if ((n = strlcpy(p, nterm->name, l)) < l) {
      p += n;
      l -= n;
      *p++ = '|';
      l--;
      if (nterm->_alias != NULL && (n = strlcpy(p, nterm->_alias, l)) < l) {
        p += n;
        l -= n;
        *p++ = '|';
        l--;
      }
      if (nterm->desc != NULL && (n = strlcpy(p, nterm->desc, l)) < l) {
        p += n;
        l -= n;
        *p++ = '|';
        l--;
      }
      p--;
    }
    *p = '\0';
  }

  return oterm;
}

int del_curterm(TERMINAL *oterm) {

  if (oterm == NULL)
    return ERR;
  free(oterm->_area);
  free(oterm->strs);
  free(oterm->nums);
  free(oterm->flags);
  free(oterm->_userdefs);
  free(oterm->_buf);
  free(oterm);
  if (oterm == cur_term)
    cur_term = NULL;
  return OK;
}

char *termname(void) {

  _DIAGASSERT(cur_term != NULL);
  return __UNCONST(cur_term->name);
}

static const char *nullname = "";

char *longname(void) {

  _DIAGASSERT(cur_term != NULL);
  if (cur_term->desc == NULL)
    return __UNCONST(nullname);
  return __UNCONST(cur_term->desc);
}
