75 lines
1.9 KiB
C
Executable File
75 lines
1.9 KiB
C
Executable File
/*
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* databits_uic.c
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*
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* Copyright (C) 2014 Marcos Vives Del Sol <socram8888@gmail.com>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdio.h>
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#include "databits.h"
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#include "uic_codes.h"
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/*
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* UIC-751-3 Ground-train decoder
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*/
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unsigned int
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databits_decode_uic(char *output,
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unsigned long long input,
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unsigned int type)
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{
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int written;
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if (!output) {
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return 0;
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}
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unsigned int code = (unsigned int) bit_reverse(bit_window(input, 24, 8), 8);
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written = sprintf(output, "Train ID: %X%X%X%X%X%X - Message: %02X (%s)\n",
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(unsigned int) bit_window(input, 0, 4),
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(unsigned int) bit_window(input, 4, 4),
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(unsigned int) bit_window(input, 8, 4),
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(unsigned int) bit_window(input, 12, 4),
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(unsigned int) bit_window(input, 16, 4),
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(unsigned int) bit_window(input, 20, 4),
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code,
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uic_message_meaning(code, type)
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);
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return written;
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}
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unsigned int
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databits_decode_uic_ground(char *output,
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unsigned int outputSize,
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unsigned long long input,
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unsigned int inputSize)
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{
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return databits_decode_uic(output,
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input,
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UIC_TYPE_GROUNDTRAIN);
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}
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unsigned int
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databits_decode_uic_train(char *output,
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unsigned int outputSize,
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unsigned long long input,
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unsigned int inputSize)
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{
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return databits_decode_uic(output,
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input,
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UIC_TYPE_TRAINGROUND);
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}
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