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typedef struct x1f4_textpipe_type {
    const char *name;
    int (*copy) (void *, const char *, unsigned);
    unsigned size;
    void *text;
} x1f4_textpipe_type;

The x1f4_textpipe_type record describes some output device for certain libx1f4i0 interfaces operating data of such type. It details such (application and programming language) output device attributes as prefix id, and data operations such as byte string output.

See Referable Objects.

The name field is the output device prefix id, i.e. the string used for prefixing the device specific output routines.
The size field is the output device prefix id length, i.e. the number of characters (not including the terminal null) making up the output device prefix id.
The text field is the output device context. It is passed as argument to type specific methods and not used otherwise.
The copy field is the address of the routine outputting some byte string on the device corresponding this very definition. When called, the copy routine is supplied the device context, (the text field in this very record), the address at which the byte string to be output is stored and its size, in this order.

The method is expected to return zero for success, non zero for failure.