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.Dd November 16, 2007
.Dt AG_BYTESWAP 3
.Os
.ds vT Agar API Reference
.ds oS Agar 1.3
.Sh NAME
.Nm AG_ByteSwap
.Nd agar byte swapping macros
.Sh SYNOPSIS
.Bd -literal
#include <agar/core/byteswap.h>
.Ed
.Sh DESCRIPTION
These macros swap the order of bytes in integers and floating-point types.
They are useful when reading or writing data of a specific endianness.
.Pp
.nr nS 1
.Ft "Uint16"
.Fn AG_Swap16 "Uint16 value"
.Pp
.Ft "Uint32"
.Fn AG_Swap32 "Uint32 value"
.Pp
.Ft "Uint64"
.Fn AG_Swap64 "Uint64 value"
.Pp
.Ft "float"
.Fn AG_SwapFLT "float value"
.Pp
.Ft "double"
.Fn AG_SwapDBL "double value"
.Pp
.Ft "long double"
.Fn AG_SwapLDBL "long double value"
.Pp
.Ft "Uint16"
.Fn AG_SwapLE16 "Uint16 value"
.Pp
.Ft "Uint32"
.Fn AG_SwapLE32 "Uint32 value"
.Pp
.Ft "Uint64"
.Fn AG_SwapLE64 "Uint64 value"
.Pp
.Ft "float"
.Fn AG_SwapLEFLT "float value"
.Pp
.Ft "double"
.Fn AG_SwapLEDBL "double value"
.Pp
.Ft "long double"
.Fn AG_SwapLELDBL "long double value"
.Pp
.Ft "Uint16"
.Fn AG_SwapBE16 "Uint16 value"
.Pp
.Ft "Uint32"
.Fn AG_SwapBE32 "Uint32 value"
.Pp
.Ft "Uint64"
.Fn AG_SwapBE64 "Uint64 value"
.Pp
.Ft "float"
.Fn AG_SwapBEFLT "float value"
.Pp
.Ft "double"
.Fn AG_SwapBEDBL "double value"
.Pp
.Ft "long double"
.Fn AG_SwapBELDBL "long double value"
.Pp
.nr nS 0
The functions
.Fn AG_Swap16 ,
.Fn AG_Swap32 ,
.Fn AG_Swap64 ,
.Fn AG_SwapFLT ,
.Fn AG_SwapDBL
and
.Fn AG_SwapLDBL
return the given value with the byte order reversed.
.Pp
.Fn AG_SwapLE16 ,
.Fn AG_SwapLE32 ,
.Fn AG_SwapLE64 ,
.Fn AG_SwapLEFLT ,
.Fn AG_SwapLEDBL
and
.Fn AG_SwapLELDBL
returns the given value with the byte order reversed if the current
architecture is big-endian.
On little-endian machines, these functions return the value unchanged.
.Pp
.Fn AG_SwapBE16 ,
.Fn AG_SwapBE32 ,
.Fn AG_SwapBE64 ,
.Fn AG_SwapBEFLT ,
.Fn AG_SwapBEDBL
and
.Fn AG_SwapBELDBL
returns the given value with the byte order reversed if the current
architecture is little-endian.
On big-endian machines, these functions return the value unchanged.
.Pp
If 64-bit types are not supported,
.Fn AG_Swap64 ,
.Fn AG_SwapLE64
and
.Fn AG_SwapBE64
are not defined.
If quad-precision arithmetic is not supported,
.Fn AG_SwapLDBL ,
.Fn AG_SwapLELDBL
and
.Fn AG_SwapBELDBL
are not defined.
.Sh SEE ALSO
.Xr AG_Intro 3 ,
.Xr AG_DataSource 3
.Sh HISTORY
The
.Nm
macros first appeared in Agar 1.3