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https://git.rwth-aachen.de/acs/public/villas/node/
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95 lines
2.7 KiB
C++
95 lines
2.7 KiB
C++
/** Line-based formats
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*
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* @file
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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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* VILLASnode
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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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#pragma once
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#include <villas/format.hpp>
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namespace villas {
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namespace node {
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class LineFormat : public Format {
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protected:
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virtual size_t sprintLine(char *buf, size_t len, const struct sample *smp) = 0;
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virtual size_t sscanLine(const char *buf, size_t len, struct sample *smp) = 0;
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char delimiter; /**< Newline delimiter. */
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char comment; /**< Prefix for comment lines. */
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bool skip_first_line; /**< While reading, the first line is skipped (header) */
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bool print_header; /**< Before any data, a header line is printed */
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bool first_line_skipped;
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bool header_printed;
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public:
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LineFormat(int fl, char delim = '\n', char com = '#') :
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Format(fl),
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delimiter(delim),
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comment(com),
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skip_first_line(false),
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print_header(true),
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first_line_skipped(false),
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header_printed(false)
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{ }
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/** Print a header. */
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virtual void header(FILE *f, const struct vlist *sigs)
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{
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header_printed = true;
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}
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virtual int sprint(char *buf, size_t len, size_t *wbytes, const struct sample * const smps[], unsigned cnt);
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virtual int sscan(const char *buf, size_t len, size_t *rbytes, struct sample * const smps[], unsigned cnt);
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virtual int scan(FILE *f, struct sample * const smps[], unsigned cnt);
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virtual int print(FILE *f, const struct sample * const smps[], unsigned cnt);
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virtual void parse(json_t *json);
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};
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template <typename T, const char *name, const char *desc, int flags = 0, char delimiter = '\n'>
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class LineFormatPlugin : public FormatFactory {
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public:
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using FormatFactory::FormatFactory;
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virtual Format * make()
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{
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return new T(flags, delimiter);
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}
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/// Get plugin name
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virtual std::string
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getName() const
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{ return name; }
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/// Get plugin description
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virtual std::string
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getDescription() const
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{ return desc; }
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};
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} /* namespace node */
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} /* namespace villas */
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