1 /**************************************************************************** 2 * Copyright (c) 1998-2014,2015 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 1996-on * 33 ****************************************************************************/ 34 35 /* 36 * lib_baudrate.c 37 * 38 */ 39 40 #include <curses.priv.h> 41 #include <termcap.h> /* ospeed */ 42 #if defined(__FreeBSD__) 43 #include <sys/param.h> 44 #endif 45 46 /* 47 * These systems use similar header files, which define B1200 as 1200, etc., 48 * but can be overridden by defining USE_OLD_TTY so B1200 is 9, which makes all 49 * of the indices up to B115200 fit nicely in a 'short', allowing us to retain 50 * ospeed's type for compatibility. 51 */ 52 #if NCURSES_OSPEED_COMPAT && ((defined(__FreeBSD__) && (__FreeBSD_version < 700000)) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__APPLE__)) 53 #undef B0 54 #undef B50 55 #undef B75 56 #undef B110 57 #undef B134 58 #undef B150 59 #undef B200 60 #undef B300 61 #undef B600 62 #undef B1200 63 #undef B1800 64 #undef B2400 65 #undef B4800 66 #undef B9600 67 #undef B19200 68 #undef EXTA 69 #undef B38400 70 #undef EXTB 71 #undef B57600 72 #undef B115200 73 #undef B230400 74 #undef B460800 75 #undef B921600 76 #define USE_OLD_TTY 77 #include <sys/ttydev.h> 78 #else 79 #undef USE_OLD_TTY 80 #endif /* USE_OLD_TTY */ 81 82 MODULE_ID("$Id: lib_baudrate.c,v 1.37 2015/06/14 00:34:12 tom Exp $") 83 84 /* 85 * int 86 * baudrate() 87 * 88 * Returns the current terminal's baud rate. 89 * 90 */ 91 92 struct speed { 93 NCURSES_OSPEED s; /* values for 'ospeed' */ 94 int sp; /* the actual speed */ 95 }; 96 97 #define DATA(number) { (NCURSES_OSPEED)B##number, number } 98 99 static struct speed const speeds[] = 100 { 101 DATA(0), 102 DATA(50), 103 DATA(75), 104 DATA(110), 105 DATA(134), 106 DATA(150), 107 DATA(200), 108 DATA(300), 109 DATA(600), 110 DATA(1200), 111 DATA(1800), 112 DATA(2400), 113 DATA(4800), 114 DATA(9600), 115 #ifdef B19200 116 DATA(19200), 117 #elif defined(EXTA) 118 {EXTA, 19200}, 119 #endif 120 #ifdef B38400 121 DATA(38400), 122 #elif defined(EXTB) 123 {EXTB, 38400}, 124 #endif 125 #ifdef B57600 126 DATA(57600), 127 #endif 128 /* ifdef to prevent overflow when OLD_TTY is not available */ 129 #if !(NCURSES_OSPEED_COMPAT && defined(__FreeBSD__) && (__FreeBSD_version > 700000)) 130 #ifdef B115200 131 DATA(115200), 132 #endif 133 #ifdef B230400 134 DATA(230400), 135 #endif 136 #ifdef B460800 137 DATA(460800), 138 #endif 139 #ifdef B921600 140 DATA(921600), 141 #endif 142 #endif 143 }; 144 145 NCURSES_EXPORT(int) 146 _nc_baudrate(int OSpeed) 147 { 148 #if !USE_REENTRANT 149 static int last_OSpeed; 150 static int last_baudrate; 151 #endif 152 153 int result = ERR; 154 unsigned i; 155 156 #if !USE_REENTRANT 157 if (OSpeed == last_OSpeed) { 158 result = last_baudrate; 159 } 160 #endif 161 if (result == ERR) { 162 if (OSpeed >= 0) { 163 for (i = 0; i < SIZEOF(speeds); i++) { 164 if ((int) speeds[i].s == OSpeed) { 165 result = speeds[i].sp; 166 break; 167 } 168 } 169 } 170 #if !USE_REENTRANT 171 if (OSpeed != last_OSpeed) { 172 last_OSpeed = OSpeed; 173 last_baudrate = result; 174 } 175 #endif 176 } 177 return (result); 178 } 179 180 NCURSES_EXPORT(int) 181 _nc_ospeed(int BaudRate) 182 { 183 int result = 1; 184 unsigned i; 185 186 if (BaudRate >= 0) { 187 for (i = 0; i < SIZEOF(speeds); i++) { 188 if (speeds[i].sp == BaudRate) { 189 result = speeds[i].s; 190 break; 191 } 192 } 193 } 194 return (result); 195 } 196 197 NCURSES_EXPORT(int) 198 NCURSES_SP_NAME(baudrate) (NCURSES_SP_DCL0) 199 { 200 int result; 201 202 T((T_CALLED("baudrate(%p)"), (void *) SP_PARM)); 203 204 /* 205 * In debugging, allow the environment symbol to override when we're 206 * redirecting to a file, so we can construct repeatable test-cases 207 * that take into account costs that depend on baudrate. 208 */ 209 #ifdef TRACE 210 if (IsValidTIScreen(SP_PARM) 211 && !NC_ISATTY(fileno(SP_PARM ? SP_PARM->_ofp : stdout)) 212 && getenv("BAUDRATE") != 0) { 213 int ret; 214 if ((ret = _nc_getenv_num("BAUDRATE")) <= 0) 215 ret = 9600; 216 ospeed = (NCURSES_OSPEED) _nc_ospeed(ret); 217 returnCode(ret); 218 } 219 #endif 220 221 if (IsValidTIScreen(SP_PARM)) { 222 #ifdef USE_OLD_TTY 223 result = (int) cfgetospeed(&(TerminalOf(SP_PARM)->Nttyb)); 224 ospeed = (NCURSES_OSPEED) _nc_ospeed(result); 225 #else /* !USE_OLD_TTY */ 226 #ifdef TERMIOS 227 ospeed = (NCURSES_OSPEED) cfgetospeed(&(TerminalOf(SP_PARM)->Nttyb)); 228 #else 229 ospeed = (NCURSES_OSPEED) TerminalOf(SP_PARM)->Nttyb.sg_ospeed; 230 #endif 231 result = _nc_baudrate(ospeed); 232 #endif 233 TerminalOf(SP_PARM)->_baudrate = result; 234 } else { 235 result = ERR; 236 } 237 238 returnCode(result); 239 } 240 241 #if NCURSES_SP_FUNCS 242 NCURSES_EXPORT(int) 243 baudrate(void) 244 { 245 return NCURSES_SP_NAME(baudrate) (CURRENT_SCREEN); 246 } 247 #endif 248