ncurses/tinfo/lib_baudrate.c

   1 /****************************************************************************
   2  * Copyright (c) 1998 Free Software Foundation, Inc.                        *
   3  *                                                                          *
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   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,   *
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  21  * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
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  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
  35 /*
  36  *      lib_baudrate.c
  37  *
  38  */
  39
  40 #include <curses.priv.h>
  41 #include <term.h>       /* cur_term, pad_char */
  42 #include <termcap.h>    /* ospeed */
  43
  44 MODULE_ID("$Id: lib_baudrate.c,v 1.15 1999/01/31 03:05:25 tom Exp $")
  45
  46 /*
  47  *      int
  48  *      baudrate()
  49  *
  50  *      Returns the current terminal's baud rate.
  51  *
  52  */
  53
  54 struct speed {
  55         speed_t s;
  56         int sp;
  57 };
  58
  59 static struct speed const speeds[] = {
  60         {B0, 0},
  61         {B50, 50},
  62         {B75, 75},
  63         {B110, 110},
  64         {B134, 134},
  65         {B150, 150},
  66         {B200, 200},
  67         {B300, 300},
  68         {B600, 600},
  69         {B1200, 1200},
  70         {B1800, 1800},
  71         {B2400, 2400},
  72         {B4800, 4800},
  73         {B9600, 9600},
  74 #ifdef B19200
  75         {B19200, 19200},
  76 #else
  77 #ifdef EXTA
  78         {EXTA, 19200},
  79 #endif
  80 #endif
  81 #ifdef B38400
  82         {B38400, 38400},
  83 #else
  84 #ifdef EXTB
  85         {EXTB, 38400},
  86 #endif
  87 #endif
  88 #ifdef B57600
  89         {B57600, 57600},
  90 #endif
  91 #ifdef B115200
  92         {B115200, 115200},
  93 #endif
  94 #ifdef B230400
  95         {B230400, 230400},
  96 #endif
  97 #ifdef B460800
  98         {B460800, 460800},
  99 #endif
 100 };
 101
 102 int _nc_baudrate(int OSpeed)
 103 {
 104         static int last_OSpeed;
 105         static int last_baudrate;
 106
 107         int result;
 108         unsigned i;
 109
 110         if (OSpeed == last_OSpeed) {
 111                 result = last_baudrate;
 112         } else {
 113                 result = ERR;
 114                 if (OSpeed >= 0) {
 115                         for (i = 0; i < SIZEOF(speeds); i++) {
 116                                 if (speeds[i].s == (speed_t)OSpeed) {
 117                                         result = speeds[i].sp;
 118                                         break;
 119                                 }
 120                         }
 121                 }
 122                 last_baudrate = result;
 123         }
 124         return (result);
 125 }
 126
 127
 128 int _nc_ospeed(int BaudRate)
 129 {
 130         speed_t result = 1;
 131         unsigned i;
 132
 133         if (BaudRate >= 0) {
 134                 for (i = 0; i < SIZEOF(speeds); i++) {
 135                         if (speeds[i].sp == BaudRate) {
 136                                 result = speeds[i].s;
 137                                 break;
 138                         }
 139                 }
 140         }
 141         return (result);
 142 }
 143
 144 int
 145 baudrate(void)
 146 {
 147 int result;
 148
 149         T((T_CALLED("baudrate()")));
 150
 151         /*
 152          * In debugging, allow the environment symbol to override when we're
 153          * redirecting to a file, so we can construct repeatable test-cases
 154          * that take into account costs that depend on baudrate.
 155          */
 156 #ifdef TRACE
 157         if (SP && !isatty(fileno(SP->_ofp))
 158          && getenv("BAUDRATE") != 0) {
 159                 int ret;
 160                 if ((ret = _nc_getenv_num("BAUDRATE")) <= 0)
 161                         ret = 9600;
 162                 ospeed = _nc_ospeed(ret);
 163                 returnCode(ret);
 164         }
 165         else
 166 #endif
 167
 168 #ifdef TERMIOS
 169         ospeed = cfgetospeed(&cur_term->Nttyb);
 170 #else
 171         ospeed = cur_term->Nttyb.sg_ospeed;
 172 #endif
 173         result = _nc_baudrate(ospeed);
 174         if (cur_term != 0)
 175                 cur_term->_baudrate = result;
 176
 177         returnCode(result);
 178 }