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Man Pages


Manual Reference Pages  -  AL_FTOFIX (3)

NAME

al_ftofix - Allegro 5 API

CONTENTS

Synopsis
Description
Return Value
See Also

SYNOPSIS

C]
#include <allegro5/allegro.h>

al_fixed al_ftofix(double x); ]

DESCRIPTION

Converts a floating point value to fixed point. Unlike al_itofix(3), this function clamps values which could overflow the type conversion, setting Allegro[aq]s errno to ERANGE in the process if this happens.

Example:
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. */ ]

RETURN VALUE

Returns the value of the floating point value converted to fixed point clamping overflows (and setting Allegro[aq]s errno).

SEE ALSO

al_fixtof(3), al_itofix(3), al_fixtoi(3), al_get_errno(3)

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Allegro reference manual AL_FTOFIX (3)

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