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.TH "al_ftofix" "3alleg5" "" "Allegro reference manual" ""
.hy
.SH NAME
.PP
al_ftofix \- Allegro 5 API
.SH SYNOPSIS
.IP
.nf
\f[C]
#include\ <allegro5/allegro.h>

al_fixed\ al_ftofix(double\ x);
\f[]
.fi
.SH DESCRIPTION
.PP
Converts a floating point value to fixed point.
Unlike al_itofix(3alleg5), this function clamps values which could
overflow the type conversion, setting Allegro's errno to ERANGE in the
process if this happens.
.PP
Example:
.IP
.nf
\f[C]
al_fixed\ number;

number\ =\ al_itofix(\-40000);
assert(al_fixfloor(number)\ ==\ \-32768);

number\ =\ al_itofix(64000);
assert(al_fixfloor(number)\ ==\ 32767);
assert(!al_get_errno());\ /*\ This\ will\ fail.\ */
\f[]
.fi
.SH RETURN VALUE
.PP
Returns the value of the floating point value converted to fixed point
clamping overflows (and setting Allegro's errno).
.SH SEE ALSO
.PP
al_fixtof(3alleg5), al_itofix(3alleg5), al_fixtoi(3alleg5),
al_get_errno(3alleg5)