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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 "../Signal.h" |
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#include "../Debug.h" |
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#include "XmlElement.h" |
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#include "Channel.h" |
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#include "SubscriptionManager.h" |
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#include "Subscription.h" |
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#include "../DataType.h" |
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#include <algorithm> |
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using namespace MsrProto; |
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///////////////////////////////////////////////////////////////////////////// |
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Subscription::Subscription(const Channel *channel, bool event, |
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unsigned int decimation, size_t blocksize, |
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bool base64, size_t precision): |
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channel(channel), |
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event(event), decimation(event ? 1 : decimation), |
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bufferOffset(channel->offset) |
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{ |
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trigger = 0; |
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nblocks = 0; |
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if (!decimation) |
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decimation = 1U; |
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if (!blocksize) |
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blocksize = 1U; |
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if (event) { |
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this->trigger_start = decimation; |
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this->trigger = 0; |
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this->blocksize = 1; |
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} |
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else { |
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this->blocksize = blocksize; |
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} |
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this->precision = precision; |
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this->base64 = base64; |
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size_t dataLen = this->blocksize * channel->memSize; |
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data_bptr = new char[dataLen]; |
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data_eptr = data_bptr + dataLen; |
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data_pptr = data_bptr; |
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} |
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///////////////////////////////////////////////////////////////////////////// |
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Subscription::~Subscription() |
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{ |
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delete data_bptr; |
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} |
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///////////////////////////////////////////////////////////////////////////// |
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bool Subscription::newValue (const char *buf) |
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{ |
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const size_t n = channel->memSize; |
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buf += bufferOffset; |
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if (event) { |
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if (!std::equal(buf, buf + n, data_bptr)) { |
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std::copy(buf, buf + n, data_bptr); |
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nblocks = 1; |
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data_pptr = data_bptr + n; |
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} |
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if (!trigger) { |
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if (nblocks) |
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trigger = trigger_start; |
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return nblocks; |
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} |
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--trigger; |
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return false; |
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} |
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std::copy(buf, buf + n, data_pptr); |
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data_pptr += n; |
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++nblocks; |
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return nblocks == blocksize; |
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} |
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///////////////////////////////////////////////////////////////////////////// |
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void Subscription::print(XmlElement &parent) |
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{ |
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// if (!nblocks) |
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// return; |
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XmlElement datum(parent.createChild(event ? "E" : "F")); |
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XmlElement::Attribute(datum, "c") << channel->index; |
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XmlElement::Attribute value(datum, "d"); |
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if (base64) |
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value.base64(data_bptr, nblocks * channel->memSize); |
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else |
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value.csv(channel, data_bptr, nblocks, precision); |
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data_pptr = data_bptr; |
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nblocks = 0; |
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} |
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