wchar_t_to_netcs- converts international character data from a local code set to a network code set
void wchar_t_to_netcs( rpc_binding_handle_t binding, unsigned32 network_code_set_value, wchar_t *local_data, unsigned32 local_data_length, idl_byte *network_data, unsigned32 *network_data_length, error_status_t *status);
- Specifies the target binding handle from which to obtain code set conversion information. When called from the client stub, this value is the binding handle of a compatible server returned by the rpc_ns_binding_import_next() or rpc_ns_binding_select() routine.
- The registered hexadecimal integer value that represents the code set to be used to transmit the character data over the network. In general, the network code set is the code set that the client application's code sets evaluation routine has determined to be compatible for this client and server. When the caller is the client stub, this value is the sending tag. When the caller is the server stub, this value is the receiving tag.
- A pointer to the international character data to be transmitted.
- The number of wchar_t data units to be converted. For a varying array or a conformant varying array, this value is the local value of the length_is variable. For a conformant array, this value is the local value of the size_is variable. For a fixed array, the value is the array size specified in the interface definition.
- A pointer to the converted data, in idl_byte format.
- The length of the converted data, in units of idl_byte. Specify NULL if a fixed or varying array is to be converted.
- Returns the status code from this routine. This status code indicates whether the routine completed successfully or, if not, why not.
Possible status codes and their meanings include:
Conversion between code sets not possible.
If this error occurs in the server stub, an exception is raised to the client application.
When running the host converter, the following errors can occur:
Invalid character input for conversion.
Buffer not large enough for converted characters.
The wchar_t_to_netcs() routine converts international character data from a local code set to a network code set when the wchar_t type has been specified as the local data type. The routine is one of those used for character and code set interoperability, which permits clients and servers to transfer international character data in a heterogeneous character set and code sets environment.
Applications do not call the wchar_t_to_netcs() routine directly; client and server stubs can call the routine before they marshall data that is to be transmitted over the network. The routine first converts the character data from wchar_t values to idl_byte values. Then it compares the specified network (receiving) code set to the local code set currently in use; if it finds that code set conversion is necessary, it determines which host code set converter to call to convert the data and then invokes that converter.
The routine then returns the converted data in idl_byte format. If the data is a conformant or conformant varying array, the routine also returns the length of the converted data.
When invoked from the server stub, the routine calls the dce_cs_loc_to_rgy() routine and the host converter routines. If these routines return an error, an exception is raised to the client application.
An application can specify a local data type other than cs_byte and wchar_t (the local data types for which code set conversion is implemented). In this case, the application must also supply code set conversion for this local data type as required.
Prior to calling wchar_t_to_netcs(), client and server stubs call the wchar_t_net_size() routine to calculate the size of the buffer required to hold the converted data. Because wchar_t_net_size() cannot make this calculation for fixed and varying arrays, applications should either restrict use of wchar_t_to_netcs() to conformant and conformant varying arrays, or independently ensure that the buffer allocated for converted data is large enough.
Please note that the html version of this specification may contain formatting aberrations. The definitive version is available as an electronic publication on CD-ROM from The Open Group.