1 /**************************************************************************** 2 * Copyright 2020 Thomas E. Dickey * 3 * Copyright 1998-2009,2010 Free Software Foundation, Inc. * 4 * * 5 * Permission is hereby granted, free of charge, to any person obtaining a * 6 * copy of this software and associated documentation files (the * 7 * "Software"), to deal in the Software without restriction, including * 8 * without limitation the rights to use, copy, modify, merge, publish, * 9 * distribute, distribute with modifications, sublicense, and/or sell * 10 * copies of the Software, and to permit persons to whom the Software is * 11 * furnished to do so, subject to the following conditions: * 12 * * 13 * The above copyright notice and this permission notice shall be included * 14 * in all copies or substantial portions of the Software. * 15 * * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * 17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * 18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * 19 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * 20 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * 21 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * 22 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * 23 * * 24 * Except as contained in this notice, the name(s) of the above copyright * 25 * holders shall not be used in advertising or otherwise to promote the * 26 * sale, use or other dealings in this Software without prior written * 27 * authorization. * 28 ****************************************************************************/ 29 30 /**************************************************************************** 31 * Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 * 32 * and: Eric S. Raymond <esr@snark.thyrsus.com> * 33 * and: Thomas E. Dickey 2002 * 34 * and: Juergen Pfeifer 2009 * 35 ****************************************************************************/ 36 37 /* 38 * lib_kernel.c 39 * 40 * Misc. low-level routines: 41 * erasechar() 42 * killchar() 43 * flushinp() 44 * 45 * The baudrate() and delay_output() functions could logically live here, 46 * but are in other modules to reduce the static-link size of programs 47 * that use only these facilities. 48 */ 49 50 #include <curses.priv.h> 51 52 MODULE_ID("$Id: lib_kernel.c,v 1.34 2020/11/21 22:05:58 tom Exp $") 53 54 #ifdef TERMIOS 55 static int 56 _nc_vdisable(void) 57 { 58 int value = -1; 59 #if defined(_POSIX_VDISABLE) && HAVE_UNISTD_H 60 value = _POSIX_VDISABLE; 61 #endif 62 #if defined(_PC_VDISABLE) 63 if (value == -1) { 64 value = (int) fpathconf(0, _PC_VDISABLE); 65 if (value == -1) { 66 value = 0377; 67 } 68 } 69 #elif defined(VDISABLE) 70 if (value == -1) 71 value = VDISABLE; 72 #endif 73 return value; 74 } 75 #endif /* TERMIOS */ 76 77 /* 78 * erasechar() 79 * 80 * Return erase character as given in cur_term->Ottyb. 81 * 82 */ 83 84 NCURSES_EXPORT(char) 85 NCURSES_SP_NAME(erasechar) (NCURSES_SP_DCL0) 86 { 87 int result = ERR; 88 TERMINAL *termp = TerminalOf(SP_PARM); 89 90 T((T_CALLED("erasechar(%p)"), (void *) SP_PARM)); 91 92 if (termp != 0) { 93 #ifdef TERMIOS 94 result = termp->Ottyb.c_cc[VERASE]; 95 if (result == _nc_vdisable()) 96 result = ERR; 97 #elif defined(EXP_WIN32_DRIVER) 98 result = ERR; 99 #else 100 result = termp->Ottyb.sg_erase; 101 #endif 102 } 103 returnChar((char) result); 104 } 105 106 #if NCURSES_SP_FUNCS 107 NCURSES_EXPORT(char) 108 erasechar(void) 109 { 110 return NCURSES_SP_NAME(erasechar) (CURRENT_SCREEN); 111 } 112 #endif 113 114 /* 115 * killchar() 116 * 117 * Return kill character as given in cur_term->Ottyb. 118 * 119 */ 120 121 NCURSES_EXPORT(char) 122 NCURSES_SP_NAME(killchar) (NCURSES_SP_DCL0) 123 { 124 int result = ERR; 125 TERMINAL *termp = TerminalOf(SP_PARM); 126 127 T((T_CALLED("killchar(%p)"), (void *) SP_PARM)); 128 129 if (termp != 0) { 130 #ifdef TERMIOS 131 result = termp->Ottyb.c_cc[VKILL]; 132 if (result == _nc_vdisable()) 133 result = ERR; 134 #elif defined(EXP_WIN32_DRIVER) 135 result = ERR; 136 #else 137 result = termp->Ottyb.sg_kill; 138 #endif 139 } 140 returnChar((char) result); 141 } 142 143 #if NCURSES_SP_FUNCS 144 NCURSES_EXPORT(char) 145 killchar(void) 146 { 147 return NCURSES_SP_NAME(killchar) (CURRENT_SCREEN); 148 } 149 #endif 150 151 /* 152 * flushinp() 153 * 154 * Flush any input on cur_term->Filedes 155 * 156 */ 157 158 NCURSES_EXPORT(int) 159 NCURSES_SP_NAME(flushinp) (NCURSES_SP_DCL0) 160 { 161 TERMINAL *termp = TerminalOf(SP_PARM); 162 163 T((T_CALLED("flushinp(%p)"), (void *) SP_PARM)); 164 165 if (termp != 0) { 166 #ifdef TERMIOS 167 tcflush(termp->Filedes, TCIFLUSH); 168 #else 169 errno = 0; 170 do { 171 #if defined(EXP_WIN32_DRIVER) 172 _nc_console_flush(_nc_console_fd2handle(termp->Filedes)); 173 #else 174 ioctl(termp->Filedes, TIOCFLUSH, 0); 175 #endif 176 } while 177 (errno == EINTR); 178 #endif 179 if (SP_PARM) { 180 SP_PARM->_fifohead = -1; 181 SP_PARM->_fifotail = 0; 182 SP_PARM->_fifopeek = 0; 183 } 184 returnCode(OK); 185 } 186 returnCode(ERR); 187 } 188 189 #if NCURSES_SP_FUNCS 190 NCURSES_EXPORT(int) 191 flushinp(void) 192 { 193 return NCURSES_SP_NAME(flushinp) (CURRENT_SCREEN); 194 } 195 #endif 196