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https://git.rwth-aachen.de/acs/public/villas/node/
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68 lines
1.6 KiB
C++
68 lines
1.6 KiB
C++
/** A simple growing buffer.
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*
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* @author Steffen Vogel <stvogel@eonerc.rwth-aachen.de>
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* @copyright 2014-2020, Institute for Automation of Complex Power Systems, EONERC
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* @license GNU General Public License (version 3)
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*
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* VILLAScommon
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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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* 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 <cstring>
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#include <villas/compat.hpp>
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#include <villas/buffer.hpp>
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#include <villas/common.hpp>
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#include <villas/exceptions.hpp>
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using namespace villas;
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Buffer::Buffer(size_t sz) :
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buf(sz, 0)
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{ }
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void Buffer::clear()
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{
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buf.clear();
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}
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int Buffer::append(const char *data, size_t l)
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{
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buf.insert(buf.end(), data, data+l);
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return 0;
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}
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int Buffer::parseJson(json_t **j)
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{
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*j = json_loadb(buf.data(), buf.size(), 0, nullptr);
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if (!*j)
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return -1;
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return 0;
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}
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int Buffer::appendJson(json_t *j, int flags)
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{
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size_t l;
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retry: l = json_dumpb(j, buf.data() + buf.size(), buf.capacity() - buf.size(), flags);
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if (buf.capacity() < buf.size() + l) {
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buf.reserve(buf.size() + l);
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goto retry;
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}
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return 0;
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}
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