/* The (in-memory) format of a log record.

 *

 * A log record is sequence of nodes of different syntaxes. A log

 * record is described by a pointer to its root node.

 * The most important node type is literal text, which is always

 * assumed if no other syntax is detected. A full list of syntaxes

 * can be found below.

 *

 * Copyright 2015 Rainer Gerhards

 *

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 *       http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

#ifndef LOGRECORD_H_INCLUDED

#define LOGRECORD_H_INCLUDED

#include <stdint.h>

/* log record node syntaxes

 * This "enumeration" starts at 0 and increments for each new

 * syntax. Note that we do not use an enum type so that we can

 * streamline the in-memory representation. For large sets of

 * log records to be held in main memory, this is important.

 */

#define LRN_SYNTAX_LITERAL_TEXT		0

#define LRN_SYNTAX_IPV4			1

#define LRN_SYNTAX_INT_POSITIVE		2

#define LRN_SYNTAX_DATE_RFC3164		3

struct logrec_node {

	struct logrec_node *next; /* NULL: end of record */

	int8_t ntype;

	union {

		char *ltext; /* the literal text */

		int64_t number; /* all integer types */

	} val;

};

typedef struct logrec_node logrecord_t;

#endif  /* ifndef LOGRECORD_H_INCLUDED */