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https://git.rwth-aachen.de/acs/public/villas/node/
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69 lines
2.1 KiB
C++
69 lines
2.1 KiB
C++
/* Line-based formats.
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*
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* Author: Steffen Vogel <post@steffenvogel.de>
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* SPDX-FileCopyrightText: 2014-2023 Institute for Automation of Complex Power Systems, RWTH Aachen University
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* SPDX-License-Identifier: Apache-2.0
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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,
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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), delimiter(delim), comment(com), skip_first_line(false),
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print_header(true), first_line_skipped(false), header_printed(false) {}
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// Print a header
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virtual void header(FILE *f, const SignalList::Ptr sigs) {
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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,
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const struct Sample *const smps[], unsigned cnt);
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virtual int sscan(const char *buf, size_t len, size_t *rbytes,
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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,
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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() { return new T(flags, delimiter); }
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/// Get plugin name
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virtual std::string getName() const { return name; }
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/// Get plugin description
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virtual std::string getDescription() const { return desc; }
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};
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} // namespace node
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} // namespace villas
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