SHI_Properties Class

An indexed collection of typed name/value pairs. More...

Typedefs
typedef struct SHI_Properties	SHI_Properties
	A SHI_Properties object represents a list of name/value pairs. More...

Functions
SHI_PUBLIC_API SHI_Result	SHI_Properties_GetProperty (SHI_Properties *self, const char *name, SHI_DataType type, SHI_Data **property)
	Gets the value of a property. More...
SHI_PUBLIC_API SHI_Result	SHI_Properties_SetProperty (SHI_Properties *self, const char *name, SHI_DataType type, const SHI_DataValue *value)
	Sets the value of a property. More...
SHI_PUBLIC_API SHI_Cardinal	SHI_Properties_GetPropertyCount (SHI_Properties *self)
	Gets the number of properties in the list. More...
SHI_PUBLIC_API SHI_Result	SHI_Properties_GetPropertyNames (SHI_Properties *self, SHI_Data **names)
	Gets an array containing the names of all the properties in the list. More...

Detailed Description

An indexed collection of typed name/value pairs.

Typedef Documentation

typedef struct SHI_Properties SHI_Properties

A SHI_Properties object represents a list of name/value pairs.

The list may contain read-only properties and/or read-write properties. Read-only properties cannot be set. Read-write properties can be set/updated by calling the SHI_Properties_SetProperty method.

Function Documentation

SHI_PUBLIC_API SHI_Result SHI_Properties_GetProperty	(	SHI_Properties *	self,
		const char *	name,
		SHI_DataType	type,
		SHI_Data **	property
	)

Gets the value of a property.

If this method succeeds, the SHI_Data object returned must be released before the property list is released. If no property with the specified name exists in the list, or if a property with that name exists, but with a different data type than the specified type, this method returns SHI_ERROR_NO_SUCH_ITEM.

Parameters

self	The SHI_Properties from which a property value will be obtained.
name	Name of the property.
type	Data type of the property. If the type is unknown, this parameter can be set to SHI_DATA_TYPE_UNKNOWN.
property	Address of a SHI_Data pointer that will be set to refer to a SHI_Data object containing the property. If this pointer is NULL, no property is returned. (This may be used to test whether or not a certain property exists, without obtaining its value.)

SHI_PUBLIC_API SHI_Cardinal SHI_Properties_GetPropertyCount

(

SHI_Properties *

self

)

Gets the number of properties in the list.

Parameters

self	The SHI_Properties list.

Returns

The number of properties in the list.

SHI_PUBLIC_API SHI_Result SHI_Properties_GetPropertyNames	(	SHI_Properties *	self,
		SHI_Data **	names
	)

Gets an array containing the names of all the properties in the list.

The SHI_Data object returned must be released before this list is released.

Parameters

self	The SHI_Properties whose property names will be returned.
names	Address of a SHI_Data pointer that will be set to refer to a SHI_Data object containing the list of names. The SHI_Data will be set to have value type SHI_DATA_TYPE_ARRAY. The elements in the array are of type SHI_DATA_TYPE_STRING.

SHI_PUBLIC_API SHI_Result SHI_Properties_SetProperty	(	SHI_Properties *	self,
		const char *	name,
		SHI_DataType	type,
		const SHI_DataValue *	value
	)

Sets the value of a property.

This method returns SHI_ERROR_NO_SUCH_ITEM if no property with the specified name exists in the list, or if a property with that name exists, but with a different data type than the specified type. This method fails with error code SHI_ERROR_NOT_SUPPORTED if the property list is read-only, or if the value of the property with the specified name is read-only.

Parameters

self	The SHI_Properties for which a property value will be set.
name	Name of the property.
type	Data type of the property.
value	Pointer to a SHI_DataValue to be used to set the property value.