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Manual Reference Pages  -  FFI_PREP_CIF_VAR (3)

NAME

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

CONTENTS

Synopsis
Description
Return Values
See Also

SYNOPSIS


.In ffi.h ffi_status
.Fo ffi_prep_cif_var ffi_cif *cif ffi_abi abi unsigned int nfixedargs unsigned int ntotalargs ffi_type *rtype ffi_type **atypes
.Fc

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)
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