NAME

     ffi_prep_cif_var — Prepare a ffi_cif structure for use with ffi_call for variadic functions.

SYNOPSIS

     #include <ffi.h>

     ffi_status
     ffi_prep_cif_var(ffi_cif *cif, ffi_abi abi, unsigned int nfixedargs,
         unsigned int ntotalargs, ffi_type *rtype, ffi_type **atypes);

DESCRIPTION

     The ffi_prep_cif_var function prepares a ffi_cif structure for use with ffi_call for
     variadic functions.  abi specifies a set of calling conventions to use.  atypes is an array
     of ntotalargs pointers to ffi_type structs that describe the data type, size and alignment
     of each argument.  rtype points to an ffi_type that describes the data type, size and
     alignment of the return value.  nfixedargs must contain the number of fixed (non-variadic)
     arguments.  Note that to call a non-variadic function ffi_prep_cif must be used.

RETURN VALUES

     Upon successful completion, ffi_prep_cif_var returns FFI_OK.  It will return FFI_BAD_TYPEDEF
     if cif is NULL or atypes or rtype is malformed. If abi does not refer to a valid ABI,
     FFI_BAD_ABI will be returned. Available ABIs are defined in <ffitarget.h>

SEE ALSO

     ffi(3), ffi_call(3), ffi_prep_cif(3)

                                         January 25, 2011