.TH LIBCOLOUR_PROPER 3 libcolour
.SH NAME
libcolour_proper - Set any member that is set incorrectly
.SH SYNOPSIS
.nf
#include <libcolour.h>

int \fBlibcolour_proper_f\fP(libcolour_colour_f_t *\fIcolour\fP);
int \fBlibcolour_proper_lf\fP(libcolour_colour_lf_t *\fIcolour\fP);
int \fBlibcolour_proper_llf\fP(libcolour_colour_llf_t *\fIcolour\fP);

#define \fBlibcolour_proper\fP(\fIcolour\fP)\\
	(_Generic((\fIcolour\fP),\\
	          libcolour_colour_f_t *:   \fBlibcolour_proper_f\fP(\fIcolour\fP),\\
	          libcolour_colour_lf_t *:  \fBlibcolour_proper_lf\fP(\fIcolour\fP),\\
	          libcolour_colour_llf_t *: \fBlibcolour_proper_llf\fP(\fIcolour\fP)))
	          /* list is incomplete */
.fi
.SH DESCRIPTION
.B libcolour_proper
and its non-generic functions sets any member or
submember of
.I colour
that is set incorrectly. When calling the macro
.B libcolour_proper
(but not the non-generic function),
.I colour.model
is set to the correct value if the type
.I colour
is one of the colour
.IR struct s
and not on the the
.IR union s.
.SH RETURN VALUES
Upon successful completion, the functions returns 0.
Otherwise the function return -1 with
.I errno
set to indicate the error.
.SH ERRORS
.TP
.B EDOM
The function tried to invert an non-invertable matrix.
.SH SEE ALSO
.BR libcolour (7)
.SH AUTHORS
Mattias Andrée
.RI < maandree@kth.se >