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72 lines
2.0 KiB
C
72 lines
2.0 KiB
C
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/*
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* Copyright (C) 1995 by Andrey A. Chernov, Moscow, Russia.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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extern short ospeed;
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static struct stable {
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long speed;
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short code;
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} table[] = {
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{115200,17},
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{57600, 16},
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{38400, 15},
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{19200, 14},
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{9600, 13},
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{4800, 12},
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{2400, 11},
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{1800, 10},
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{1200, 9},
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{600, 8},
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{300, 7},
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{200, 6},
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{150, 5},
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{134, 4},
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{110, 3},
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{75, 2},
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{50, 1},
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{0, 0},
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{-1, -1}
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};
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void _set_ospeed(long speed)
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{
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struct stable *stable;
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if (speed == 0) {
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ospeed = 0;
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return;
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}
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for (stable = table; stable->speed > 0; stable++) {
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/* nearest one, rounded down */
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if (stable->speed <= speed) {
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ospeed = stable->code;
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return;
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}
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}
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ospeed = 1; /* 50, min and not hangup */
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}
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