1 /**************************************************************************** 2 * Copyright (c) 1998,2000,2002 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 ****************************************************************************/ 33 34 /* $FreeBSD$ */ 35 36 /* 37 * lib_baudrate.c 38 * 39 */ 40 41 #include <curses.priv.h> 42 #include <term.h> /* cur_term, pad_char */ 43 #include <termcap.h> /* ospeed */ 44 45 /* 46 * These systems use similar header files, which define B1200 as 1200, etc., 47 * but can be overridden by defining USE_OLD_TTY so B1200 is 9, which makes all 48 * of the indices up to B115200 fit nicely in a 'short', allowing us to retain 49 * ospeed's type for compatibility. 50 */ 51 #if defined(__NetBSD__) || defined(__OpenBSD__) 52 #undef B0 53 #undef B50 54 #undef B75 55 #undef B110 56 #undef B134 57 #undef B150 58 #undef B200 59 #undef B300 60 #undef B600 61 #undef B1200 62 #undef B1800 63 #undef B2400 64 #undef B4800 65 #undef B9600 66 #undef B19200 67 #undef EXTA 68 #undef B38400 69 #undef EXTB 70 #undef B57600 71 #undef B115200 72 #undef B230400 73 #undef B460800 74 #undef B921600 75 #define USE_OLD_TTY 76 #include <sys/ttydev.h> 77 #else 78 #undef USE_OLD_TTY 79 #endif /* USE_OLD_TTY */ 80 81 MODULE_ID("$Id: lib_baudrate.c,v 1.22 2002/01/19 23:07:53 Andrey.A.Chernov Exp $") 82 83 /* 84 * int 85 * baudrate() 86 * 87 * Returns the current terminal's baud rate. 88 * 89 */ 90 91 struct speed { 92 int s; /* value for 'ospeed' is an index */ 93 int sp; /* the actual speed */ 94 }; 95 96 static struct speed const speeds[] = 97 { 98 {B0, 0}, 99 {B50, 50}, 100 {B75, 75}, 101 {B110, 110}, 102 {B134, 134}, 103 {B150, 150}, 104 {B200, 200}, 105 {B300, 300}, 106 {B600, 600}, 107 {B1200, 1200}, 108 {B1800, 1800}, 109 {B2400, 2400}, 110 {B4800, 4800}, 111 {B9600, 9600}, 112 #ifdef B19200 113 {B19200, 19200}, 114 #else 115 #ifdef EXTA 116 {EXTA, 19200}, 117 #endif 118 #endif 119 #ifdef B38400 120 {B38400, 38400}, 121 #else 122 #ifdef EXTB 123 {EXTB, 38400}, 124 #endif 125 #endif 126 #ifdef B57600 127 {B57600, 57600}, 128 #endif 129 #ifdef B115200 130 {B115200, 115200}, 131 #endif 132 #ifdef B230400 133 {B230400, 230400}, 134 #endif 135 #ifdef B460800 136 {B460800, 460800}, 137 #endif 138 #ifdef B921600 139 {B921600, 921600}, 140 #endif 141 }; 142 143 NCURSES_EXPORT(int) 144 _nc_baudrate(int OSpeed) 145 { 146 static int last_OSpeed; 147 static int last_baudrate; 148 149 int result; 150 unsigned i; 151 152 if (OSpeed == last_OSpeed) { 153 result = last_baudrate; 154 } else { 155 result = ERR; 156 if (OSpeed >= 0) { 157 for (i = 0; i < SIZEOF(speeds); i++) { 158 if (speeds[i].s == OSpeed) { 159 result = speeds[i].sp; 160 break; 161 } 162 } 163 } 164 last_baudrate = result; 165 } 166 return (result); 167 } 168 169 NCURSES_EXPORT(int) 170 _nc_ospeed(int BaudRate) 171 { 172 int result = 1; 173 unsigned i; 174 175 if (BaudRate >= 0) { 176 for (i = 0; i < SIZEOF(speeds); i++) { 177 if (speeds[i].sp == BaudRate) { 178 result = speeds[i].s; 179 break; 180 } 181 } 182 } 183 return (result); 184 } 185 186 NCURSES_EXPORT(int) 187 baudrate(void) 188 { 189 int result; 190 191 T((T_CALLED("baudrate()"))); 192 193 /* 194 * In debugging, allow the environment symbol to override when we're 195 * redirecting to a file, so we can construct repeatable test-cases 196 * that take into account costs that depend on baudrate. 197 */ 198 #ifdef TRACE 199 if (SP && !isatty(fileno(SP->_ofp)) 200 && getenv("BAUDRATE") != 0) { 201 int ret; 202 if ((ret = _nc_getenv_num("BAUDRATE")) <= 0) 203 ret = 9600; 204 ospeed = _nc_ospeed(ret); 205 returnCode(ret); 206 } 207 #endif 208 209 #ifdef USE_OLD_TTY 210 result = cfgetospeed(&cur_term->Nttyb); 211 ospeed = _nc_ospeed(result); 212 #else /* !USE_OLD_TTY */ 213 #ifdef TERMIOS 214 ospeed = cfgetospeed(&cur_term->Nttyb); 215 #else 216 ospeed = cur_term->Nttyb.sg_ospeed; 217 #endif 218 result = _nc_baudrate(ospeed); 219 #endif 220 if (cur_term != 0) 221 cur_term->_baudrate = result; 222 223 returnCode(result); 224 } 225