VMS Help DCE_RPC, Application Routines, rpc_rgy_get_max_bytes  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 NAME

   rpc_rgy_get_max_bytes - Gets the maximum number of bytes that a
                           code set uses to encode one character from
                           the code set registry on a host

   Used by client and server applications.

 SYNOPSIS

   #include <dce/rpc.h>

   void rpc_rgy_get_max_bytes( unsigned32 rgy_code_set_value,
                               unsigned16 *rgy_max_bytes,
                               error_status_t *status );

 PARAMETERS

   Input

   rgy_code_set_value
       The registered hexadecimal value that uniquely identifies the
       code set.

   Output

   rgy_max_bytes
       The registered decimal value that indicates the number of bytes
       this code set uses to encode one character.

   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:

       dce_cs_c_cannot_open_file

       dce_cs_c_cannot_read_file

       dce_cs_c_notfound

       dce_cs_c_unknown

       rpc_s_ok

 DESCRIPTION

   The rpc_rgy_get_max_bytes() routine belongs to a set of DCE RPC
   routines for use by client and server applications that are
   transferring international character data in a heterogeneous
   character set and code sets environment.

   The rpc_rgy_get_max_bytes() routine reads the code set registry on the
   local host. It takes the specified registered code set value, uses it
   as an index into the registry, and returns the decimal value that
   indicates the number of bytes that the code set uses to encode one
   character.

   The DCE RPC stub support routines for buffer sizing use the
   rpc_rgy_get_max_bytes() routine as part of their procedure to
   determine whether additional storage needs to be allocated for
   conversion between local and network code sets.  The DCE RPC stub
   support routines call the rpc_rgy_get_max_bytes() routine once to
   get the rgy_max_bytes value for the code set to be used to transfer
   the data over the network (the "network" code set) then call the
   routine again to get the rgy_max_bytes value of their local code set.
   The stubs then compare the two values to determine whether or not
   additional buffers are necessary or whether the conversion can be
   done "in place".

   Client and server applications that use the DCE RPC buffer sizing
   routines byte_net_size(), byte_local_size(), wchar_t_net_size(), and
   wchar_t_local_size() do not need to call this routine explicitly
   because these DCE RPC stub support routines call it on their behalf.
   Application programmers who are developing their own stub support
   routines for buffer sizing can use the rpc_rgy_get_max_bytes() routine
   in their code to get code set max_byte information for their user-
  written buffer sizing routines.

   Permissions Required

   No permissions are required.

 RETURN VALUES

   No value is returned.

 RELATED INFORMATION

   Commands: csrc.

   Functions: dce_cs_loc_to_rgy
              dce_cs_rgy_to_loc
              rpc_ns_mgmt_read_code_sets
              rpc_rgy_get_code_sets