1 /**************************************************************************** 2 * Copyright (c) 1998-2009,2010 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 * and: Juergen Pfeifer 2009 * 34 ****************************************************************************/ 35 36 /* 37 * lib_kernel.c 38 * 39 * Misc. low-level routines: 40 * erasechar() 41 * killchar() 42 * flushinp() 43 * 44 * The baudrate() and delay_output() functions could logically live here, 45 * but are in other modules to reduce the static-link size of programs 46 * that use only these facilities. 47 */ 48 49 #include <curses.priv.h> 50 51 MODULE_ID("$Id: lib_kernel.c,v 1.31 2010/12/19 01:21:19 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 = (int) 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 NCURSES_SP_NAME(erasechar) (NCURSES_SP_DCL0) 83 { 84 int result = ERR; 85 TERMINAL *termp = TerminalOf(SP_PARM); 86 87 T((T_CALLED("erasechar(%p)"), (void *) SP_PARM)); 88 89 if (termp != 0) { 90 #ifdef TERMIOS 91 result = termp->Ottyb.c_cc[VERASE]; 92 if (result == _nc_vdisable()) 93 result = ERR; 94 #else 95 result = termp->Ottyb.sg_erase; 96 #endif 97 } 98 returnChar((char) result); 99 } 100 101 #if NCURSES_SP_FUNCS 102 NCURSES_EXPORT(char) 103 erasechar(void) 104 { 105 return NCURSES_SP_NAME(erasechar) (CURRENT_SCREEN); 106 } 107 #endif 108 109 /* 110 * killchar() 111 * 112 * Return kill character as given in cur_term->Ottyb. 113 * 114 */ 115 116 NCURSES_EXPORT(char) 117 NCURSES_SP_NAME(killchar) (NCURSES_SP_DCL0) 118 { 119 int result = ERR; 120 TERMINAL *termp = TerminalOf(SP_PARM); 121 122 T((T_CALLED("killchar(%p)"), (void *) SP_PARM)); 123 124 if (termp != 0) { 125 #ifdef TERMIOS 126 result = termp->Ottyb.c_cc[VKILL]; 127 if (result == _nc_vdisable()) 128 result = ERR; 129 #else 130 result = termp->Ottyb.sg_kill; 131 #endif 132 } 133 returnChar((char) result); 134 } 135 136 #if NCURSES_SP_FUNCS 137 NCURSES_EXPORT(char) 138 killchar(void) 139 { 140 return NCURSES_SP_NAME(killchar) (CURRENT_SCREEN); 141 } 142 #endif 143 144 /* 145 * flushinp() 146 * 147 * Flush any input on cur_term->Filedes 148 * 149 */ 150 151 NCURSES_EXPORT(int) 152 NCURSES_SP_NAME(flushinp) (NCURSES_SP_DCL0) 153 { 154 TERMINAL *termp = TerminalOf(SP_PARM); 155 156 T((T_CALLED("flushinp(%p)"), (void *) SP_PARM)); 157 158 if (termp != 0) { 159 #ifdef TERMIOS 160 tcflush(termp->Filedes, TCIFLUSH); 161 #else 162 errno = 0; 163 do { 164 ioctl(termp->Filedes, TIOCFLUSH, 0); 165 } while 166 (errno == EINTR); 167 #endif 168 if (SP_PARM) { 169 SP_PARM->_fifohead = -1; 170 SP_PARM->_fifotail = 0; 171 SP_PARM->_fifopeek = 0; 172 } 173 returnCode(OK); 174 } 175 returnCode(ERR); 176 } 177 178 #if NCURSES_SP_FUNCS 179 NCURSES_EXPORT(int) 180 flushinp(void) 181 { 182 return NCURSES_SP_NAME(flushinp) (CURRENT_SCREEN); 183 } 184 #endif 185