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stream_code/2
stream_code(-Stream, +CStream)
stream_code(+Stream, -CStream)
Converts between Prolog representation, Stream, and C representation, CStream, of a stream.
stream_object
A valid Prolog stream.
integer
Representing an SP_stream *
pointer.
At least one argument must be ground.
stream_code/2
is used when there are input/output related operations
performed on the same stream in both Prolog code and foreign code.
The CStream value can be used as the stream argument to
any of the SP_* functions taking a stream argument.
instantiation_error
Both Stream and CStream unbound.
type_error
Stream or CStream is not a stream type or CStream is not an integer type.
existence_error
Stream is syntactically valid but does not name an open stream or CStream is of integer type but does not name a pointer to a stream.