ncurses/lib_kernel.c

   1 /****************************************************************************
   2  * Copyright (c) 1998 Free Software Foundation, Inc.                        *
   3  *                                                                          *
   4  * Permission is hereby granted, free of charge, to any person obtaining a  *
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   6  * "Software"), to deal in the Software without restriction, including      *
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   8  * distribute, distribute with modifications, sublicense, and/or sell       *
   9  * copies of the Software, and to permit persons to whom the Software is    *
  10  * furnished to do so, subject to the following conditions:                 *
  11  *                                                                          *
  12  * The above copyright notice and this permission notice shall be included  *
  13  * in all copies or substantial portions of the Software.                   *
  14  *                                                                          *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
  16  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
  17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
  18  * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
  19  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
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  21  * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
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  23  * Except as contained in this notice, the name(s) of the above copyright   *
  24  * holders shall not be used in advertising or otherwise to promote the     *
  25  * sale, use or other dealings in this Software without prior written       *
  26  * authorization.                                                           *
  27  ****************************************************************************/
  28
  29 /****************************************************************************
  30  *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
  31  *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
  32  ****************************************************************************/
  33
  34
  35 /*
  36  *      lib_kernel.c
  37  *
  38  *      Misc. low-level routines:
  39  *              reset_prog_mode()
  40  *              reset_shell_mode()
  41  *              erasechar()
  42  *              killchar()
  43  *              flushinp()
  44  *              savetty()
  45  *              resetty()
  46  *
  47  * The baudrate() and delay_output() functions could logically live here,
  48  * but are in other modules to reduce the static-link size of programs
  49  * that use only these facilities.
  50  */
  51
  52 #include <curses.priv.h>
  53 #include <term.h>       /* cur_term */
  54
  55 MODULE_ID("$Id: lib_kernel.c,v 1.17 1998/02/11 12:13:57 tom Exp $")
  56
  57 int reset_prog_mode(void)
  58 {
  59         T((T_CALLED("reset_prog_mode()")));
  60
  61         if (cur_term != 0) {
  62                 _nc_set_curterm(&cur_term->Nttyb);
  63                 if (SP && stdscr && stdscr->_use_keypad)
  64                         _nc_keypad(TRUE);
  65                 returnCode(OK);
  66         }
  67         returnCode(ERR);
  68 }
  69
  70
  71 int reset_shell_mode(void)
  72 {
  73         T((T_CALLED("reset_shell_mode()")));
  74
  75         if (cur_term != 0) {
  76                 if (SP)
  77                 {
  78                         fflush(SP->_ofp);
  79                         _nc_keypad(FALSE);
  80                 }
  81                 returnCode(_nc_set_curterm(&cur_term->Ottyb));
  82         }
  83         returnCode(ERR);
  84 }
  85
  86 /*
  87  *      erasechar()
  88  *
  89  *      Return erase character as given in cur_term->Ottyb.
  90  *
  91  */
  92
  93 char
  94 erasechar(void)
  95 {
  96         T((T_CALLED("erasechar()")));
  97
  98         if (cur_term != 0) {
  99 #ifdef TERMIOS
 100                 returnCode(cur_term->Ottyb.c_cc[VERASE]);
 101 #else
 102                 returnCode(cur_term->Ottyb.sg_erase);
 103 #endif
 104         }
 105         returnCode(ERR);
 106 }
 107
 108
 109
 110 /*
 111  *      killchar()
 112  *
 113  *      Return kill character as given in cur_term->Ottyb.
 114  *
 115  */
 116
 117 char
 118 killchar(void)
 119 {
 120         T((T_CALLED("killchar()")));
 121
 122         if (cur_term != 0) {
 123 #ifdef TERMIOS
 124                 returnCode(cur_term->Ottyb.c_cc[VKILL]);
 125 #else
 126                 returnCode(cur_term->Ottyb.sg_kill);
 127 #endif
 128         }
 129         returnCode(ERR);
 130 }
 131
 132
 133
 134 /*
 135  *      flushinp()
 136  *
 137  *      Flush any input on cur_term->Filedes
 138  *
 139  */
 140
 141 int flushinp(void)
 142 {
 143         T((T_CALLED("flushinp()")));
 144
 145         if (cur_term != 0) {
 146 #ifdef TERMIOS
 147                 tcflush(cur_term->Filedes, TCIFLUSH);
 148 #else
 149                 errno = 0;
 150                 do {
 151                     ioctl(cur_term->Filedes, TIOCFLUSH, 0);
 152                 } while
 153                     (errno == EINTR);
 154 #endif
 155                 if (SP) {
 156                         SP->_fifohead = -1;
 157                         SP->_fifotail = 0;
 158                         SP->_fifopeek = 0;
 159                 }
 160                 returnCode(OK);
 161         }
 162         returnCode(ERR);
 163 }
 164
 165 /*
 166 **      savetty()  and  resetty()
 167 **
 168 */
 169
 170 static TTY   buf;
 171
 172 int savetty(void)
 173 {
 174         T((T_CALLED("savetty()")));
 175
 176         returnCode(_nc_get_curterm(&buf));
 177 }
 178
 179 int resetty(void)
 180 {
 181         T((T_CALLED("resetty()")));
 182
 183         returnCode(_nc_set_curterm(&buf));
 184 }