12.3.90 SP_set_user_stream_hook() [preinit]

Synopsis

     #include <sicstus/sicstus.h>
     
     typedef SP_stream *
     SP_UserStreamHook(void *user_data, int which);
     
     SP_UserStreamHook *
     SP_set_user_stream_hook(SP_UserStreamHook *hook, void *user_data);

Sets the user-stream hook to hook. Must be called before SP_initialize().

Arguments

hook

It is called three times, one for each stream. The which argument indicates which stream it is called for. The value of which is one of:

SP_STREAMHOOK_STDIN

Create stream for standard input.

SP_STREAMHOOK_STDOUT

Create stream for standard output.

SP_STREAMHOOK_STDERR

Create stream for standard error.

The hook should return a standard SICStus text I/O stream, as described in Defining a New Stream.

user_data

An arbitrary pointer that will be passed to the hook.

See Also

Hookable Standard Streams.