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/*
** Zabbix
** Copyright (C) 2001-2022 Zabbix SIA
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation; either version 2 of the License, or
** (at your option) any later version.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
** GNU General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
**/
#ifndef ZABBIX_JSONPATH_H
#define ZABBIX_JSONPATH_H
#include "zbxjson.h"
typedef struct zbx_jsonpath_token zbx_jsonpath_token_t;
typedef enum
{
ZBX_JSONPATH_SEGMENT_UNKNOWN,
ZBX_JSONPATH_SEGMENT_MATCH_ALL,
ZBX_JSONPATH_SEGMENT_MATCH_LIST,
ZBX_JSONPATH_SEGMENT_MATCH_RANGE,
ZBX_JSONPATH_SEGMENT_MATCH_EXPRESSION,
ZBX_JSONPATH_SEGMENT_FUNCTION
}
zbx_jsonpath_segment_type_t;
/* specifies if the match list contains object property names or array indices */
typedef enum
{
ZBX_JSONPATH_LIST_NAME = 1,
ZBX_JSONPATH_LIST_INDEX
}
zbx_jsonpath_list_type_t;
typedef enum
{
ZBX_JSONPATH_FUNCTION_MIN = 1,
ZBX_JSONPATH_FUNCTION_MAX,
ZBX_JSONPATH_FUNCTION_AVG,
ZBX_JSONPATH_FUNCTION_LENGTH,
ZBX_JSONPATH_FUNCTION_FIRST,
ZBX_JSONPATH_FUNCTION_SUM,
/* the element name suffix '~' internally is treated as a function */
ZBX_JSONPATH_FUNCTION_NAME
}
zbx_jsonpath_function_type_t;
typedef struct zbx_jsonpath_list_item
{
struct zbx_jsonpath_list_item *next;
/* the structure is always over-allocated so that either int */
/* or a zero terminated string can be stored in data */
char data[1];
}
zbx_jsonpath_list_node_t;
typedef struct
{
zbx_jsonpath_list_node_t *values;
zbx_jsonpath_list_type_t type;
}
zbx_jsonpath_list_t;
typedef struct
{
int start;
int end;
unsigned int flags;
}
zbx_jsonpath_range_t;
typedef enum
{
ZBX_JSONPATH_EXPRESSION_INDEX_TRUE,
ZBX_JSONPATH_EXPRESSION_INDEX_FALSE,
}
zbx_json_path_expression_index_t;
/* expression tokens in postfix notation */
typedef struct
{
zbx_vector_ptr_t tokens;
zbx_jsonpath_token_t *index_token; /* relative path token that is used to index parent object */
zbx_jsonpath_token_t *value_token; /* the index value token */
}
zbx_jsonpath_expression_t;
typedef struct
{
zbx_jsonpath_function_type_t type;
}
zbx_jsonpath_function_t;
typedef union
{
zbx_jsonpath_list_t list;
zbx_jsonpath_range_t range;
zbx_jsonpath_expression_t expression;
zbx_jsonpath_function_t function;
}
zbx_jsonpath_data_t;
struct zbx_jsonpath_segment
{
zbx_jsonpath_segment_type_t type;
zbx_jsonpath_data_t data;
/* set to 1 if the segment is 'detached' and can be anywhere in parent node tree */
unsigned char detached;
};
/* */
/* Token groups: */
/* operand - constant value, jsonpath reference, result of () evaluation */
/* operator2 - binary operator (arithmetic or comparison) */
/* operator1 - unary operator (negation !) */
/* */
typedef enum
{
ZBX_JSONPATH_TOKEN_GROUP_NONE,
ZBX_JSONPATH_TOKEN_GROUP_OPERAND,
ZBX_JSONPATH_TOKEN_GROUP_OPERATOR2, /* binary operator */
ZBX_JSONPATH_TOKEN_GROUP_OPERATOR1 /* unary operator */
}
zbx_jsonpath_token_group_t;
/* expression token types */
typedef enum
{
ZBX_JSONPATH_TOKEN_PATH_ABSOLUTE = 1,
ZBX_JSONPATH_TOKEN_PATH_RELATIVE,
ZBX_JSONPATH_TOKEN_CONST_STR,
ZBX_JSONPATH_TOKEN_CONST_NUM,
ZBX_JSONPATH_TOKEN_PAREN_LEFT,
ZBX_JSONPATH_TOKEN_PAREN_RIGHT,
ZBX_JSONPATH_TOKEN_OP_PLUS,
ZBX_JSONPATH_TOKEN_OP_MINUS,
ZBX_JSONPATH_TOKEN_OP_MULT,
ZBX_JSONPATH_TOKEN_OP_DIV,
ZBX_JSONPATH_TOKEN_OP_EQ,
ZBX_JSONPATH_TOKEN_OP_NE,
ZBX_JSONPATH_TOKEN_OP_GT,
ZBX_JSONPATH_TOKEN_OP_GE,
ZBX_JSONPATH_TOKEN_OP_LT,
ZBX_JSONPATH_TOKEN_OP_LE,
ZBX_JSONPATH_TOKEN_OP_NOT,
ZBX_JSONPATH_TOKEN_OP_AND,
ZBX_JSONPATH_TOKEN_OP_OR,
ZBX_JSONPATH_TOKEN_OP_REGEXP
}
zbx_jsonpath_token_type_t;
struct zbx_jsonpath_token
{
unsigned char type;
char *text;
zbx_jsonpath_t *path;
};
#endif
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