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VILLASnode/include/villas/mapping.hpp
Steffen Vogel 7eec1bb753 update Steffens mail address
Signed-off-by: Steffen Vogel <post@steffenvogel.de>
2022-12-16 23:44:07 +01:00

110 lines
2.5 KiB
C++

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