termios/cfsetspeed.c

   1 /* Copyright (C) 1992, 1993, 1996, 1997, 1998 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.  */
  18
  19 #include <termios.h>
  20 #include <errno.h>
  21 #include <stddef.h>
  22
  23 struct speed_struct
  24 {
  25   speed_t value;
  26   speed_t internal;
  27 };
  28
  29 static const struct speed_struct speeds[] =
  30   {
  31 #ifdef B0
  32     { 0, B0 },
  33 #endif
  34 #ifdef B50
  35     { 50, B50 },
  36 #endif
  37 #ifdef B75
  38     { 75, B75 },
  39 #endif
  40 #ifdef B110
  41     { 110, B110 },
  42 #endif
  43 #ifdef B134
  44     { 134, B134 },
  45 #endif
  46 #ifdef B150
  47     { 150, B150 },
  48 #endif
  49 #ifdef B200
  50     { 200, B200 },
  51 #endif
  52 #ifdef B300
  53     { 300, B300 },
  54 #endif
  55 #ifdef B600
  56     { 600, B600 },
  57 #endif
  58 #ifdef B1200
  59     { 1200, B1200 },
  60 #endif
  61 #ifdef B1200
  62     { 1200, B1200 },
  63 #endif
  64 #ifdef B1800
  65     { 1800, B1800 },
  66 #endif
  67 #ifdef B2400
  68     { 2400, B2400 },
  69 #endif
  70 #ifdef B4800
  71     { 4800, B4800 },
  72 #endif
  73 #ifdef B9600
  74     { 9600, B9600 },
  75 #endif
  76 #ifdef B19200
  77     { 19200, B19200 },
  78 #endif
  79 #ifdef B38400
  80     { 38400, B38400 },
  81 #endif
  82 #ifdef B57600
  83     { 57600, B57600 },
  84 #endif
  85 #ifdef B76800
  86     { 76800, B76800 },
  87 #endif
  88 #ifdef B115200
  89     { 115200, B115200 },
  90 #endif
  91 #ifdef B153600
  92     { 153600, B153600 },
  93 #endif
  94 #ifdef B230400
  95     { 230400, B230400 },
  96 #endif
  97 #ifdef B307200
  98     { 307200, B307200 },
  99 #endif
 100 #ifdef B460800
 101     { 460800, B460800 },
 102 #endif
 103   };
 104
 105
 106 /* Set both the input and output baud rates stored in *TERMIOS_P to SPEED.  */
 107 int
 108 cfsetspeed (struct termios *termios_p, speed_t speed)
 109 {
 110   size_t cnt;
 111
 112   for (cnt = 0; cnt < sizeof (speeds) / sizeof (speeds[0]); ++cnt)
 113     if (speed == speeds[cnt].internal)
 114       {
 115         cfsetispeed (termios_p, speed);
 116         cfsetospeed (termios_p, speed);
 117         return 0;
 118       }
 119     else if (speed == speeds[cnt].value)
 120       {
 121         cfsetispeed (termios_p, speeds[cnt].internal);
 122         cfsetospeed (termios_p, speeds[cnt].internal);
 123         return 0;
 124       }
 125
 126   __set_errno (EINVAL);
 127
 128   return -1;
 129 }