SYNOPSIS

#include <transform.h>

Trf_ControlBlock Trf_CreateCtrlBlock
(
       ClientData writeClientData,

       Trf_WriteProc *fun,

       Trf_Options optInfo,

       Tcl_Interp *interp,

       ClientData clientData

);

PARAMETERS

ClientData writeClientData

Arbitrary information given as clientdata to 'fun'.

Trf_WriteProc *fun

Vector to use for writing generated results.

Trf_Options optInfo

Options to configure the control.

Tcl_Interp *interp

Interpreter for error messages.

ClientData clientData

Arbitrary information, as defined in Trf_TypeDefinition.clientData.

DESCRIPTION

The procedure has to create a control structure for an encoder/decoder. The structure must be initialized with the contents of the the option container. Return value is an opaque handle aof the control structure or NULL in case of failure. An error message should be left in the result area of the specified interpreter then.