Defines
Byte Ordering
Miscellaneous

Utilities for swapping the order of bytes to match the Endianness of the required platform. More...

+ Collaboration diagram for Byte Ordering:

Defines

#define C74_LITTLE_ENDIAN
 A macro that indicates whether or not the current architecture uses Litte-endian byte ordering (such as is used on an i386 processor).
#define C74_BIG_ENDIAN
 A macro that indicates whether or not the current architecture uses Big-endian byte ordering (such as is used on a PPC processor).
#define BYTEORDER_SWAPW16(x)
 Switch the byte ordering of a short integer.
#define BYTEORDER_SWAPW32(x)
 Switch the byte ordering of an integer.
#define BYTEORDER_SWAPF32
 Switch the byte ordering of a float.
#define BYTEORDER_SWAPF64
 Switch the byte ordering of a double.

Detailed Description

Utilities for swapping the order of bytes to match the Endianness of the required platform.

An introduction to the issue of endianness can be found at http://en.wikipedia.org/wiki/Endianness.

Of particular relevance is that a Macintosh with a PPC processor uses a Big-endian byte ordering, whereas an Intel processor in a Mac or Windows machine will use a Little-endian byte ordering.

These utilities are defined to assist with cases where byte ordering needs to be manipulated for floats or ints. Note that floats are subject to the same byte ordering rules as integers. While the IEEE defines the bits, the machine still defines how the bits are arranged with regard to bytes.

Define Documentation

#define BYTEORDER_SWAPF32

Switch the byte ordering of a float.

Parameters:
xA float.
Returns:
A float with the byte-ordering swapped.
#define BYTEORDER_SWAPF64

Switch the byte ordering of a double.

Parameters:
xA double.
Returns:
A double.
#define BYTEORDER_SWAPW16 (   x)

Switch the byte ordering of a short integer.

Parameters:
xA short integer.
Returns:
A short integer with the byte-ordering swapped.
#define BYTEORDER_SWAPW32 (   x)

Switch the byte ordering of an integer.

Parameters:
xAn integer.
Returns:
An integer with the byte-ordering swapped.
#define C74_BIG_ENDIAN

A macro that indicates whether or not the current architecture uses Big-endian byte ordering (such as is used on a PPC processor).

Note that this macro is always defined; it will be either a 0 or a 1.

#define C74_LITTLE_ENDIAN

A macro that indicates whether or not the current architecture uses Litte-endian byte ordering (such as is used on an i386 processor).

Note that this macro is always defined; it will be either a 0 or a 1.