| Amit Daniel Kachhap | e6a01f5 | 2011-07-20 11:45:59 +0530 | [diff] [blame] | 1 | /**************************************************************************** |
| 2 | * Copyright (c) 1998-2003,2004 Free Software Foundation, Inc. * |
| 3 | * * |
| 4 | * Permission is hereby granted, free of charge, to any person obtaining a * |
| 5 | * copy of this software and associated documentation files (the * |
| 6 | * "Software"), to deal in the Software without restriction, including * |
| 7 | * without limitation the rights to use, copy, modify, merge, publish, * |
| 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 * |
| 20 | * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * |
| 21 | * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * |
| 22 | * * |
| 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 | * and: Thomas E. Dickey 2002 * |
| 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 1.24 2004/05/08 17:11:21 tom Exp $") |
| 52 | |
| 53 | static int |
| 54 | _nc_vdisable(void) |
| 55 | { |
| 56 | int value = -1; |
| 57 | #if defined(_POSIX_VDISABLE) && HAVE_UNISTD_H |
| 58 | value = _POSIX_VDISABLE; |
| 59 | #endif |
| 60 | #if defined(_PC_VDISABLE) |
| 61 | if (value == -1) { |
| 62 | value = fpathconf(0, _PC_VDISABLE); |
| 63 | if (value == -1) { |
| 64 | value = 0377; |
| 65 | } |
| 66 | } |
| 67 | #elif defined(VDISABLE) |
| 68 | if (value == -1) |
| 69 | value = VDISABLE; |
| 70 | #endif |
| 71 | return value; |
| 72 | } |
| 73 | |
| 74 | /* |
| 75 | * erasechar() |
| 76 | * |
| 77 | * Return erase character as given in cur_term->Ottyb. |
| 78 | * |
| 79 | */ |
| 80 | |
| 81 | NCURSES_EXPORT(char) |
| 82 | erasechar(void) |
| 83 | { |
| 84 | int result = ERR; |
| 85 | T((T_CALLED("erasechar()"))); |
| 86 | |
| 87 | if (cur_term != 0) { |
| 88 | #ifdef TERMIOS |
| 89 | result = cur_term->Ottyb.c_cc[VERASE]; |
| 90 | if (result == _nc_vdisable()) |
| 91 | result = ERR; |
| 92 | #else |
| 93 | result = cur_term->Ottyb.sg_erase; |
| 94 | #endif |
| 95 | } |
| 96 | returnCode(result); |
| 97 | } |
| 98 | |
| 99 | /* |
| 100 | * killchar() |
| 101 | * |
| 102 | * Return kill character as given in cur_term->Ottyb. |
| 103 | * |
| 104 | */ |
| 105 | |
| 106 | NCURSES_EXPORT(char) |
| 107 | killchar(void) |
| 108 | { |
| 109 | int result = ERR; |
| 110 | T((T_CALLED("killchar()"))); |
| 111 | |
| 112 | if (cur_term != 0) { |
| 113 | #ifdef TERMIOS |
| 114 | result = cur_term->Ottyb.c_cc[VKILL]; |
| 115 | if (result == _nc_vdisable()) |
| 116 | result = ERR; |
| 117 | #else |
| 118 | result = cur_term->Ottyb.sg_kill; |
| 119 | #endif |
| 120 | } |
| 121 | returnCode(result); |
| 122 | } |
| 123 | |
| 124 | /* |
| 125 | * flushinp() |
| 126 | * |
| 127 | * Flush any input on cur_term->Filedes |
| 128 | * |
| 129 | */ |
| 130 | |
| 131 | NCURSES_EXPORT(int) |
| 132 | flushinp(void) |
| 133 | { |
| 134 | T((T_CALLED("flushinp()"))); |
| 135 | |
| 136 | if (cur_term != 0) { |
| 137 | #ifdef TERMIOS |
| 138 | tcflush(cur_term->Filedes, TCIFLUSH); |
| 139 | #else |
| 140 | errno = 0; |
| 141 | do { |
| 142 | ioctl(cur_term->Filedes, TIOCFLUSH, 0); |
| 143 | } while |
| 144 | (errno == EINTR); |
| 145 | #endif |
| 146 | if (SP) { |
| 147 | SP->_fifohead = -1; |
| 148 | SP->_fifotail = 0; |
| 149 | SP->_fifopeek = 0; |
| 150 | } |
| 151 | returnCode(OK); |
| 152 | } |
| 153 | returnCode(ERR); |
| 154 | } |