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https://git.rwth-aachen.de/acs/public/villas/node/
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102 lines
2.4 KiB
C
102 lines
2.4 KiB
C
/** Read / write sample data in different 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 2017, 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 "advio.h"
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#include "common.h"
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/* Forward declarations */
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struct sample;
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struct io_format;
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enum io_flags {
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IO_FLUSH = (1 << 8), /**< Flush the output stream after each chunk of samples. */
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IO_NONBLOCK = (1 << 9) /**< Dont block io_read() while waiting for new samples. */
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};
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struct io {
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enum state state;
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int flags;
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enum {
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IO_MODE_STDIO,
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IO_MODE_ADVIO,
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IO_MODE_CUSTOM
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} mode;
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/** A format type can use this file handle or overwrite the
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* format::{open,close,eof,rewind} functions and the private
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* data in io::_vd.
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*/
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union {
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struct {
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FILE *input;
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FILE *output;
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} stdio;
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struct {
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AFILE *input;
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AFILE *output;
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} advio;
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};
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struct {
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char *input;
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char *output;
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} buffer;
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void *_vd;
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struct io_format *_vt;
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};
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int io_init(struct io *io, struct io_format *fmt, int flags);
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int io_destroy(struct io *io);
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int io_open(struct io *io, const char *uri);
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int io_close(struct io *io);
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int io_print(struct io *io, struct sample *smps[], unsigned cnt);
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int io_scan(struct io *io, struct sample *smps[], unsigned cnt);
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int io_eof(struct io *io);
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void io_rewind(struct io *io);
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int io_flush(struct io *io);
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int io_fd(struct io *io);
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int io_stream_open(struct io *io, const char *uri);
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int io_stream_close(struct io *io);
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int io_stream_eof(struct io *io);
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void io_stream_rewind(struct io *io);
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int io_stream_fd(struct io *io);
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int io_stream_flush(struct io *io);
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