termios/cfsetspeed.c

   1 /* Copyright (C) 1992, 1993, 1996, 1997 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 Library General Public License as
   6    published by the Free Software Foundation; either version 2 of the
   7    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    Library General Public License for more details.
  13
  14    You should have received a copy of the GNU Library General Public
  15    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  16    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17    Boston, MA 02111-1307, USA.  */
  18
  19 #include <termios.h>
  20 #include <errno.h>
  21 #include <stddef.h>
  22
  23 static struct speed_struct
  24 {
  25   speed_t value;
  26   speed_t internal;
  27 } speeds[] =
  28   {
  29 #ifdef B0
  30     { 0, B0 },
  31 #endif
  32 #ifdef B50
  33     { 50, B50 },
  34 #endif
  35 #ifdef B75
  36     { 75, B75 },
  37 #endif
  38 #ifdef B110
  39     { 110, B110 },
  40 #endif
  41 #ifdef B134
  42     { 134, B134 },
  43 #endif
  44 #ifdef B150
  45     { 150, B150 },
  46 #endif
  47 #ifdef B200
  48     { 200, B200 },
  49 #endif
  50 #ifdef B300
  51     { 300, B300 },
  52 #endif
  53 #ifdef B600
  54     { 600, B600 },
  55 #endif
  56 #ifdef B1200
  57     { 1200, B1200 },
  58 #endif
  59 #ifdef B1200
  60     { 1200, B1200 },
  61 #endif
  62 #ifdef B1800
  63     { 1800, B1800 },
  64 #endif
  65 #ifdef B2400
  66     { 2400, B2400 },
  67 #endif
  68 #ifdef B4800
  69     { 4800, B4800 },
  70 #endif
  71 #ifdef B9600
  72     { 9600, B9600 },
  73 #endif
  74 #ifdef B19200
  75     { 19200, B19200 },
  76 #endif
  77 #ifdef B38400
  78     { 38400, B38400 },
  79 #endif
  80 #ifdef B57600
  81     { 57600, B57600 },
  82 #endif
  83 #ifdef B76800
  84     { 76800, B76800 },
  85 #endif
  86 #ifdef B115200
  87     { 115200, B115200 },
  88 #endif
  89 #ifdef B153600
  90     { 153600, B153600 },
  91 #endif
  92 #ifdef B230400
  93     { 230400, B230400 },
  94 #endif
  95 #ifdef B307200
  96     { 307200, B307200 },
  97 #endif
  98 #ifdef B460800
  99     { 460800, B460800 },
 100 #endif
 101   };
 102
 103
 104 /* Set both the input and output baud rates stored in *TERMIOS_P to SPEED.  */
 105 int
 106 cfsetspeed (struct termios *termios_p, speed_t speed)
 107 {
 108   size_t cnt;
 109
 110   for (cnt = 0; cnt < sizeof (speeds) / sizeof (speeds[0]); ++cnt)
 111     if (speed == speeds[cnt].internal)
 112       {
 113         cfsetispeed (termios_p, speed);
 114         cfsetospeed (termios_p, speed);
 115         return 0;
 116       }
 117     else if (speed == speeds[cnt].value)
 118       {
 119         cfsetispeed (termios_p, speeds[cnt].internal);
 120         cfsetospeed (termios_p, speeds[cnt].internal);
 121         return 0;
 122       }
 123
 124   __set_errno (EINVAL);
 125
 126   return -1;
 127 }