GSP
Quick Navigator

Search Site

Unix VPS
A - Starter
B - Basic
C - Preferred
D - Commercial
MPS - Dedicated
Previous VPSs
* Sign Up! *

Support
Contact Us
Online Help
Handbooks
Domain Status
Man Pages

FAQ
Virtual Servers
Pricing
Billing
Technical

Network
Facilities
Connectivity
Topology Map

Miscellaneous
Server Agreement
Year 2038
Credits
 

USA Flag

 

 

Man Pages


Manual Reference Pages  -  AL_FIXADD (3)

NAME

al_fixadd - Allegro 5 API

CONTENTS

Synopsis
Description
Return Value
See Also

SYNOPSIS

C]
#include <allegro5/allegro.h>

al_fixed al_fixadd(al_fixed x, al_fixed y); ]

DESCRIPTION

Although fixed point numbers can be added with the normal C]+] integer operator, that doesn[aq]t provide any protection against overflow. If overflow is a problem, you should use this function instead. It is slower than using integer operators, but if an overflow occurs it will set Allegro[aq]s errno and clamp the result, rather than just letting it wrap.

Example:
C]
    al_fixed result;

/* This will put 5035 into ‘result[aq]. */ result = al_fixadd(al_itofix(5000), al_itofix(35));

/* Sets errno and puts -32768 into ‘result[aq]. */ result = al_fixadd(al_itofix(-31000), al_itofix(-3000)); assert(!al_get_errno()); /* This will fail. */ ]

RETURN VALUE

Returns the clamped result of adding C]x] to C]y], setting Allegro[aq]s errno to ERANGE if there was an overflow.

SEE ALSO

al_fixsub(3), al_fixmul(3), al_fixdiv(3).

Search for    or go to Top of page |  Section 3 |  Main Index


Allegro reference manual AL_FIXADD (3)

Powered by GSP Visit the GSP FreeBSD Man Page Interface.
Output converted with manServer 1.07.