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/***************************************************************************** |
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* |
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* $Id$ |
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* |
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* Copyright 2010 Richard Hacker (lerichi at gmx dot net) |
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* |
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* This file is part of the pdserv library. |
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* |
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* The pdserv library is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU Lesser General Public License as published |
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* by the Free Software Foundation, either version 3 of the License, or (at |
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* your option) any later version. |
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* |
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* The pdserv library is distributed in the hope that it will be useful, but |
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public |
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* License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public License |
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* along with the pdserv library. If not, see <http://www.gnu.org/licenses/>. |
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* |
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*****************************************************************************/ |
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#include "Channel.h" |
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#include "XmlElement.h" |
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#include "../Signal.h" |
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#include "../DataType.h" |
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#include <sstream> |
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using namespace MsrProto; |
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///////////////////////////////////////////////////////////////////////////// |
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Channel::Channel(const PdServ::Signal *s, size_t index, |
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const PdServ::DataType& dtype, |
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const PdServ::DataType::DimType& dim, |
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size_t offset, Channel *parent): |
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Variable(s, index, dtype, dim, offset, parent), |
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signal(s) |
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{ |
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// log_debug("new var %s idx=%u size=%zu, nelem=%zu offset=%zu", |
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// path().c_str(), index, dtype.size, dim.nelem, offset); |
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} |
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///////////////////////////////////////////////////////////////////////////// |
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void Channel::setXmlAttributes( XmlElement &element, |
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bool shortReply, const char *data, size_t precision) const |
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{ |
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setAttributes(element, shortReply); |
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if (!shortReply) { |
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// <channel name="/lan/World Time" alias="" index="0" typ="TDBL" |
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// datasize="8" bufsize="500" HZ="50" unit="" |
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// value="1283134199.93743"/> |
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double freq = 1.0 / signal->sampleTime / signal->decimation; |
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// The MSR protocol wants a bufsize, the maximum number of |
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// values that can be retraced. This artificial limitation does |
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// not exist any more. Instead, choose a buffer size so that |
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// at a maximum of 10 seconds has to be stored. |
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size_t bufsize = 10 * std::max(1U, (unsigned int)(freq + 0.5)); |
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if (shortReply) |
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return; |
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// bufsize= |
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XmlElement::Attribute(element, "bufsize") << bufsize; |
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XmlElement::Attribute(element, "HZ") << freq; |
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if (data) |
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XmlElement::Attribute(element, "value").csv(this, |
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data + offset, 1, precision); |
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} |
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addCompoundFields(element, dtype); |
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} |
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