ncurses/tinfo/lib_kernel.c

   1 /****************************************************************************
   2  * Copyright (c) 1998 Free Software Foundation, Inc.                        *
   3  *                                                                          *
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   6  * "Software"), to deal in the Software without restriction, including      *
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   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,   *
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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  *              erasechar()
  40  *              killchar()
  41  *              flushinp()
  42  *
  43  * The baudrate() and delay_output() functions could logically live here,
  44  * but are in other modules to reduce the static-link size of programs
  45  * that use only these facilities.
  46  */
  47
  48 #include <curses.priv.h>
  49 #include <term.h>       /* cur_term */
  50
  51 MODULE_ID("$Id: lib_kernel.c,v 1.19 1998/12/20 00:18:45 tom Exp $")
  52
  53 /*
  54  *      erasechar()
  55  *
  56  *      Return erase character as given in cur_term->Ottyb.
  57  *
  58  */
  59
  60 char
  61 erasechar(void)
  62 {
  63         T((T_CALLED("erasechar()")));
  64
  65         if (cur_term != 0) {
  66 #ifdef TERMIOS
  67                 returnCode(cur_term->Ottyb.c_cc[VERASE]);
  68 #else
  69                 returnCode(cur_term->Ottyb.sg_erase);
  70 #endif
  71         }
  72         returnCode(ERR);
  73 }
  74
  75
  76
  77 /*
  78  *      killchar()
  79  *
  80  *      Return kill character as given in cur_term->Ottyb.
  81  *
  82  */
  83
  84 char
  85 killchar(void)
  86 {
  87         T((T_CALLED("killchar()")));
  88
  89         if (cur_term != 0) {
  90 #ifdef TERMIOS
  91                 returnCode(cur_term->Ottyb.c_cc[VKILL]);
  92 #else
  93                 returnCode(cur_term->Ottyb.sg_kill);
  94 #endif
  95         }
  96         returnCode(ERR);
  97 }
  98
  99
 100
 101 /*
 102  *      flushinp()
 103  *
 104  *      Flush any input on cur_term->Filedes
 105  *
 106  */
 107
 108 int flushinp(void)
 109 {
 110         T((T_CALLED("flushinp()")));
 111
 112         if (cur_term != 0) {
 113 #ifdef TERMIOS
 114                 tcflush(cur_term->Filedes, TCIFLUSH);
 115 #else
 116                 errno = 0;
 117                 do {
 118                     ioctl(cur_term->Filedes, TIOCFLUSH, 0);
 119                 } while
 120                     (errno == EINTR);
 121 #endif
 122                 if (SP) {
 123                         SP->_fifohead = -1;
 124                         SP->_fifotail = 0;
 125                         SP->_fifopeek = 0;
 126                 }
 127                 returnCode(OK);
 128         }
 129         returnCode(ERR);
 130 }