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High Performance OPC UA Server SDK
1.2.0.193
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High Performance OPC UA Server SDK
1.2.0.193
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A simplified form of the ua_attributeoperand. More...
#include <simpleattributeoperand.h>
Data Fields | |
| struct ua_nodeid | type_definition_id |
| NodeId of a TypeDefinitionNode. More... | |
| struct ua_qualifiedname * | browse_path |
| A relative path to a Node. More... | |
| int32_t | num_browse_path |
| Number of elements in ua_simpleattributeoperand::browse_path. | |
| uint32_t | attribute_id |
| ID of the Attribute. More... | |
| struct ua_string | index_range |
| This parameter is used to identify a single element of an array, or a single range of indexes for an array. More... | |
Related Functions | |
| void | ua_simpleattributeoperand_init (struct ua_simpleattributeoperand *t) |
| Initialize an ua_simpleattributeoperand struct with a valid value. More... | |
| void | ua_simpleattributeoperand_clear (struct ua_simpleattributeoperand *t) |
| Clear all resources alloctated in an ua_simpleattributeoperand struct. More... | |
| int | ua_simpleattributeoperand_compare (const struct ua_simpleattributeoperand *a, const struct ua_simpleattributeoperand *b) |
| Compare two ua_simpleattributeoperand structs. More... | |
| int | ua_simpleattributeoperand_copy (struct ua_simpleattributeoperand *dst, const struct ua_simpleattributeoperand *src) |
| Create a copy of a ua_simpleattributeoperand struct. More... | |
| static int | ua_simpleattributeoperand_resize_browse_path_array (struct ua_simpleattributeoperand *val, int32_t new_len) |
| Resize the browse_path array of a ua_simpleattributeoperand struct. More... | |
A simplified form of the ua_attributeoperand.
All of the rules that apply to the ua_attributeoperand also apply to the SimpleAttributeOperand.
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Clear all resources alloctated in an ua_simpleattributeoperand struct.
Frees allocated memory like arrays and resets numeric values. The ua_simpleattributeoperand struct itself is not freed and must be freed by the caller if required. This function always succeeds for a valid ua_simpleattributeoperand struct, that was validly decoded, initilized by ua_simpleattributeoperand_init or created with ua_simpleattributeoperand_copy.
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Compare two ua_simpleattributeoperand structs.
Compares the content of the ua_simpleattributeoperand struct a to the content of the ua_simpleattributeoperand struct b. If a is smaller than b, an integer less than zero is returned, if a is bigger than b, an integer greater than zero is returned. If both structs are equal zero is returned.
This function creates a total order on ua_simpleattributeoperand structs, so it is well suited to not only determine equality, but also sort multiple instances of this struct.
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Create a copy of a ua_simpleattributeoperand struct.
Copy all fields from struct ua_simpleattributeoperand src to dst. Creates a deep copy so all content is recusively copied and both src and dst can be used and must be freed separately.
dst is not cleared before the copy operation, so it must not have any allocated data. It may or may not be initilized by the caller before copy.
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Initialize an ua_simpleattributeoperand struct with a valid value.
After initialization the fields of the struct are set to valid and consistent values and can safley be accessed. An initialized ua_simpleattributeoperand struct can also be passed to ua_simpleattributeoperand_compare, ua_simpleattributeoperand_copy and ua_simpleattributeoperand_clear. This function will always succeed as long as an ua_simpleattributeoperand struct is passed to it.
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Resize the browse_path array of a ua_simpleattributeoperand struct.
Depending on new_len and the current size of the array, the array will be created, increased, decreased or deleted. In case array members are removed these are cleared properly, new array members are initialized with zero.
| new_len | New length of the browse_path array in number of members. |
| attribute_id |
ID of the Attribute.
The Value attribute shall be supported by all Servers. The support of other attributes depends on requirements set in Profiles or other parts of this specification.
| browse_path |
A relative path to a Node.
This parameter specifies a relative path using a list of browse names instead of the ua_relativepath structure used in the ua_attributeoperand. The list of browse names is equivalent to a relative path that specifies forward references which are subtypes of the HierarchicalReferences reference type.
All nodes followed by the browsePath shall be of the NodeClass object or variable.
If this list is empty, the node is the instance of the TypeDefinition.
| index_range |
This parameter is used to identify a single element of an array, or a single range of indexes for an array.
The first element is identified by index 0 (zero).
This parameter is ignored if the selected node is not a variable or the value of a variable is not an array.
The parameter is null if not specified.
All values in the array are used if this parameter is not specified.
| type_definition_id |
NodeId of a TypeDefinitionNode.
This parameter restricts the operand to instances of the TypeDefinitionNode or one of its subtypes.