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.Dd January 25, 2011 .Dt ffi_prep_cif_var 3 .Sh NAME .Nm ffi_prep_cif_var .Nd Prepare a .Nm ffi_cif structure for use with .Nm ffi_call for variadic functions. .Sh SYNOPSIS .In ffi.h .Ft ffi_status .Fo ffi_prep_cif_var .Fa "ffi_cif *cif" .Fa "ffi_abi abi" .Fa "unsigned int nfixedargs" .Fa "unsigned int ntotalargs" .Fa "ffi_type *rtype" .Fa "ffi_type **atypes" .Fc .Sh DESCRIPTION The .Nm ffi_prep_cif_var function prepares a .Nm ffi_cif structure for use with .Nm ffi_call for variadic functions. .Fa abi specifies a set of calling conventions to use. .Fa atypes is an array of .Fa ntotalargs pointers to .Nm ffi_type structs that describe the data type, size and alignment of each argument. .Fa rtype points to an .Nm ffi_type that describes the data type, size and alignment of the return value. .Fa nfixedargs must contain the number of fixed (non-variadic) arguments. Note that to call a non-variadic function .Nm ffi_prep_cif must be used. .Sh RETURN VALUES Upon successful completion, .Nm ffi_prep_cif_var returns .Nm FFI_OK . It will return .Nm FFI_BAD_TYPEDEF if .Fa cif is .Nm NULL or .Fa atypes or .Fa rtype is malformed. If .Fa abi does not refer to a valid ABI, .Nm FFI_BAD_ABI will be returned. Available ABIs are defined in .Nm <ffitarget.h> . .Sh SEE ALSO .Xr ffi 3 , .Xr ffi_call 3 , .Xr ffi_prep_cif 3
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