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110 lines
2.5 KiB
C++
110 lines
2.5 KiB
C++
/** Sample value remapping for path source muxing.
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*
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* @file
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* @author Steffen Vogel <post@steffenvogel.de>
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* @copyright 2014-2022, Institute for Automation of Complex Power Systems, EONERC
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* @license Apache 2.0
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*********************************************************************************/
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#pragma once
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#include <jansson.h>
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#include <memory>
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#include <villas/common.hpp>
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#include <villas/stats.hpp>
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#include <villas/node_list.hpp>
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#define RE_MAPPING_INDEX "[a-zA-Z0-9_]+"
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#define RE_MAPPING_RANGE "(" RE_MAPPING_INDEX ")(?:-(" RE_MAPPING_INDEX "))?"
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#define RE_MAPPING_STATS "stats\\.([a-z]+)\\.([a-z]+)"
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#define RE_MAPPING_HDR "hdr\\.(sequence|length)"
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#define RE_MAPPING_TS "ts\\.(origin|received)"
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#define RE_MAPPING_DATA1 "data\\[" RE_MAPPING_RANGE "\\]"
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#define RE_MAPPING_DATA2 "(?:data\\.)?(" RE_MAPPING_INDEX ")"
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#define RE_MAPPING "(?:(" RE_NODE_NAME ")\\.(?:" RE_MAPPING_STATS "|" RE_MAPPING_HDR "|" RE_MAPPING_TS "|" RE_MAPPING_DATA1 "|" RE_MAPPING_DATA2 ")|(" RE_NODE_NAME ")(?:\\[" RE_MAPPING_RANGE "\\])?)"
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namespace villas {
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namespace node {
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/* Forward declarations */
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class Node;
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struct Sample;
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class Signal;
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class MappingEntry {
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public:
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using Ptr = std::shared_ptr<MappingEntry>;
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enum class Type {
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UNKNOWN,
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DATA,
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STATS,
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HEADER,
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TIMESTAMP
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};
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enum class HeaderType {
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LENGTH,
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SEQUENCE
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};
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enum class TimestampType {
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ORIGIN,
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RECEIVED
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};
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Node *node; /**< The node to which this mapping refers. */
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enum Type type; /**< The mapping type. Selects one of the union fields below. */
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/** The number of values which is covered by this mapping entry.
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*
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* A value of 0 indicates that all remaining values starting from the offset of a sample should be mapped.
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*/
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int length;
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unsigned offset; /**< Offset of this mapping entry within sample::data */
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union {
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struct {
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int offset;
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Signal *signal;
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char *first;
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char *last;
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} data;
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struct {
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enum Stats::Metric metric;
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enum Stats::Type type;
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} stats;
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struct {
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enum HeaderType type;
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} header;
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struct {
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enum TimestampType type;
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} timestamp;
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};
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std::string nodeName; /**< Used for between parse and prepare only. */
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MappingEntry();
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int prepare(NodeList &nodes);
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int update(struct Sample *remapped, const struct Sample *original) const;
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int parse(json_t *json);
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int parseString(const std::string &str);
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std::string toString(unsigned index) const;
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Signal::Ptr toSignal(unsigned index) const;
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};
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} /* namespace node */
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} /* namespace villas */
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