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VMS Help DCE, DCE_RPC, Application Routines, idl_es_encode_fixed_buffer *Conan The Librarian |
NAME
idl_es_encode_fixed_buffer - Returns a fixed buffer encoding handle
to the IDL encoding services
SYNOPSIS
void idl_es_encode_fixed_buffer( idl_byte *data_buffer,
idl_ulong_int data_buffer_size,
idl_ulong_int *encoded_buffer_size,
idl_es_handle_t *es_handle,
error_status_t *status );
PARAMETERS
Input
data_buffer
The address of the application-supplied buffer. This address
must be 8-byte aligned.
data_buffer_size
The size of the application-supplied buffer. The size must be
a multiple of 8 bytes.
Output
encoded_buffer_size
Returns the address to which the IDL encoding services write
the size of the encoded buffer when they have completed
encoding the data.
es_handle
Returns the address of an IDL encoding services handle for use
by a client or server encoding operation.
status
Returns the status code from this routine. This status code
indicates whether the routine completed successfully or, if
not, why not. The possible status codes and their meanings
are as follows:
rpc_s_ok Success.
rpc_s_bad_buffer
Bad buffer operation.
rpc_s_no_memory
Insufficient memory available to complete
operation.
DESCRIPTION
The IDL encoding services provide client and server RPC applications
with a method for encoding data types in input parameters into a
byte stream and decoding data types in output parameters from a byte
stream without invoking the RPC runtime. Encoding and decoding
operations are analogous to marshalling and unmarshalling, except
that the data is stored locally, and is not transmitted over the
network. Client and server applications can use the IDL encoding
services to create persistent storage for their data. Encoding
"flattens" complex data types into a byte stream for storage on
disk, while decoding restores the flattened data to complex form.
The idl_es_encode_fixed_buffer() routine belongs to a set of routines
that return handles to the IDL encoding services for use by client
and server encoding and decoding operations. The information in the
handle controls the way in which the IDL encoding services manage
memory when encoding or decoding data.
The idl_es_encode_fixed_buffer() routine returns a fixed buffer
encoding handle, which directs the IDL encoding services to encode
data into a single buffer that the application has provided. The
fixed buffer encoding style is useful for applications that need
only one buffer for their encoding and decoding process. The buffer
that the application allocates must be large enough to hold all of
the encoded data, and must also allocate 56 bytes for each encoding
operation that the application has defined (this space is used to
hold per-operation header information.)
RETURN VALUES
None.
RELATED INFORMATION
Functions: idl_es_encode_dyn_buffer
idl_es_encode_incremental
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