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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 AXIOM_XPATH_INTERNALS_H
#define AXIOM_XPATH_INTERNALS_H
#ifdef __cplusplus
extern "C"
{
#endif
/**
* @defgroup axiom_xpath_internals internals
* @ingroup axiom_xpath
* @{
*/
/** Get operation at index ind */
#define AXIOM_XPATH_OPR_GET(ind) (axiom_xpath_operation_t *) \
axutil_array_list_get(context->expr->operations, context->env, ind)
/**
* An error has occured while parsing
*/
#define AXIOM_XPATH_PARSE_ERROR -2
/**
* XPath expression was successfully compiled
*/
#define AXIOM_XPATH_PARSE_SUCCESS 0
/**
* End of expression reached
*/
#define AXIOM_XPATH_PARSE_END -1
/* Types */
/**
* XPath operation
* Contains the operands and parameters
*/
typedef struct axiom_xpath_operation axiom_xpath_operation_t;
/**
* XPath node test
* Stores the components of a node test
*/
typedef struct axiom_xpath_node_test axiom_xpath_node_test_t;
/**
* Functions to process a XPath operator
*/
typedef int (*axiom_xpath_operator_t)(axiom_xpath_context_t *context,
axiom_xpath_operation_t * op);
/**
* Functions to iterate through different XPath axes
*/
typedef int (*axiom_xpath_iterator_t)(axiom_xpath_context_t *context,
int op_node_test,
int op_next,
int op_predicate);
/**
* XPath node test types
*/
typedef enum axiom_xpath_node_test_type_t
{
AXIOM_XPATH_NODE_TEST_NONE = 0,
AXIOM_XPATH_NODE_TEST_ALL,
AXIOM_XPATH_NODE_TYPE_COMMENT,
AXIOM_XPATH_NODE_TYPE_NODE,
AXIOM_XPATH_NODE_TYPE_PI,
AXIOM_XPATH_NODE_TYPE_TEXT,
AXIOM_XPATH_NODE_TEST_STANDARD
} axiom_xpath_node_test_type_t;
/**
* XPath operations
*/
typedef enum axiom_xpath_operation_type_t
{
AXIOM_XPATH_OPERATION_ROOT_NODE = 0,
AXIOM_XPATH_OPERATION_CONTEXT_NODE,
AXIOM_XPATH_OPERATION_NODE_TEST,
AXIOM_XPATH_OPERATION_STEP,
AXIOM_XPATH_OPERATION_RESULT,
AXIOM_XPATH_OPERATION_UNION,
AXIOM_XPATH_OPERATION_EQUAL_EXPR,
AXIOM_XPATH_OPERATION_AND_EXPR,
AXIOM_XPATH_OPERATION_OR_EXPR,
AXIOM_XPATH_OPERATION_PREDICATE,
AXIOM_XPATH_OPERATION_LITERAL,
AXIOM_XPATH_OPERATION_NUMBER,
AXIOM_XPATH_OPERATION_PATH_EXPRESSION,
AXIOM_XPATH_OPERATION_FUNCTION_CALL,
AXIOM_XPATH_OPERATION_ARGUMENT
} axiom_xpath_operation_type_t;
/**
* XPath axes
*/
typedef enum axiom_xpath_axis_t
{
AXIOM_XPATH_AXIS_NONE = -1,
AXIOM_XPATH_AXIS_CHILD,
AXIOM_XPATH_AXIS_DESCENDANT,
AXIOM_XPATH_AXIS_PARENT,
AXIOM_XPATH_AXIS_ANCESTOR,
AXIOM_XPATH_AXIS_FOLLOWING_SIBLING,
AXIOM_XPATH_AXIS_PRECEDING_SIBLING,
AXIOM_XPATH_AXIS_FOLLOWING,
AXIOM_XPATH_AXIS_PRECEDING,
AXIOM_XPATH_AXIS_ATTRIBUTE,
AXIOM_XPATH_AXIS_NAMESPACE,
AXIOM_XPATH_AXIS_SELF,
AXIOM_XPATH_AXIS_DESCENDANT_OR_SELF,
AXIOM_XPATH_AXIS_ANCESTOR_OR_SELF
} axiom_xpath_axis_t;
/**
* XPath node test structure
*/
struct axiom_xpath_node_test
{
/** Node test type */
axiom_xpath_node_test_type_t type;
/** Prefix
* NULL if no prefix
*/
axis2_char_t *prefix;
/** Name */
axis2_char_t *name;
/** Literal for processing instruction (PI) */
axis2_char_t *lit;
};
/**
* XPath operation structure
*/
struct axiom_xpath_operation
{
/** Type of operator */
axiom_xpath_operation_type_t opr;
/** Parameters of the operation */
void *par1;
void *par2;
/** Position: Used for predicate evaluation
*/
int pos;
/** Operands pointing to other operations */
int op1;
int op2;
};
/**
* Copies an XPath expression to a context
*
* No data is duplicated just the reference is assigned.
* Some parameters in the expression are reset.
* - pos in every operation
*
* @param context XPath context must not be NULL
* @param expr Expression to be copied
*/
void axiom_xpath_expression_copy(
axiom_xpath_context_t *context,
axiom_xpath_expression_t* expr);
/** @} */
#ifdef __cplusplus
}
#endif
#endif
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