Max 5 API Reference
Max 5 API Reference
Utilities for swapping the order of bytes to match the Endianness of the required platform. More...
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Defines | |
| #define | C74_LITTLE_ENDIAN 1 |
| 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 0 |
| 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) ((short)(((((unsigned short)(x))>>8)&0x00ff)+((((unsigned short)(x))<<8)&0xff00))) |
| Switch the byte ordering of a short integer. | |
| #define | BYTEORDER_SWAPW32(x) |
| Switch the byte ordering of an integer. | |
| #define | BYTEORDER_SWAPF32 byteorder_swapf32 |
| Switch the byte ordering of a float. | |
| #define | BYTEORDER_SWAPF64 byteorder_swapf64 |
| Switch the byte ordering of a double. | |
| #define | BYTEORDER_LSBW16(x) (x) |
| Switch the byte ordering of a short integer from the native swapping to Little-endian (Least Significant Byte). | |
| #define | BYTEORDER_LSBW32(x) (x) |
| Switch the byte ordering of an integer from the native swapping to Little-endian (Least Significant Byte). | |
| #define | BYTEORDER_LSBF32(x) (x) |
| Switch the byte ordering of a float from the native swapping to Little-endian (Least Significant Byte). | |
| #define | BYTEORDER_LSBF64(x) (x) |
| Switch the byte ordering of a double from the native swapping to Little-endian (Least Significant Byte). | |
| #define | BYTEORDER_MSBW16(x) BYTEORDER_SWAPW16(x) |
| Switch the byte ordering of a short integer from the native swapping to Big-endian (Most Significant Byte). | |
| #define | BYTEORDER_MSBW32(x) BYTEORDER_SWAPW32(x) |
| Switch the byte ordering of an integer from the native swapping to Big-endian (Most Significant Byte). | |
| #define | BYTEORDER_MSBF32(x) BYTEORDER_SWAPF32(x) |
| Switch the byte ordering of a float from the native swapping to Big-endian (Most Significant Byte). | |
| #define | BYTEORDER_MSBF64(x) BYTEORDER_SWAPF64(x) |
| Switch the byte ordering of a double from the native swapping to Big-endian (Most Significant Byte). | |
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 BYTEORDER_LSBF32 | ( | x | ) | (x) |
Switch the byte ordering of a float from the native swapping to Little-endian (Least Significant Byte).
If the current environment is already Little-endian, then the returned value is not byteswapped.
| x | A float. |
Definition at line 111 of file ext_byteorder.h.
| #define BYTEORDER_LSBF64 | ( | x | ) | (x) |
Switch the byte ordering of a double from the native swapping to Little-endian (Least Significant Byte).
If the current environment is already Little-endian, then the returned value is not byteswapped.
| x | A double. |
Definition at line 121 of file ext_byteorder.h.
| #define BYTEORDER_LSBW16 | ( | x | ) | (x) |
Switch the byte ordering of a short integer from the native swapping to Little-endian (Least Significant Byte).
If the current environment is already Little-endian, then the returned value is not byteswapped.
| x | A short integer. |
Definition at line 91 of file ext_byteorder.h.
| #define BYTEORDER_LSBW32 | ( | x | ) | (x) |
Switch the byte ordering of an integer from the native swapping to Little-endian (Least Significant Byte).
If the current environment is already Little-endian, then the returned value is not byteswapped.
| x | An integer. |
Definition at line 101 of file ext_byteorder.h.
| #define BYTEORDER_MSBF32 | ( | x | ) | BYTEORDER_SWAPF32(x) |
Switch the byte ordering of a float from the native swapping to Big-endian (Most Significant Byte).
If the current environment is already Big-endian, then the returned value is not byteswapped.
| x | A float. |
Definition at line 151 of file ext_byteorder.h.
| #define BYTEORDER_MSBF64 | ( | x | ) | BYTEORDER_SWAPF64(x) |
Switch the byte ordering of a double from the native swapping to Big-endian (Most Significant Byte).
If the current environment is already Big-endian, then the returned value is not byteswapped.
| x | A double. |
Definition at line 161 of file ext_byteorder.h.
| #define BYTEORDER_MSBW16 | ( | x | ) | BYTEORDER_SWAPW16(x) |
Switch the byte ordering of a short integer from the native swapping to Big-endian (Most Significant Byte).
If the current environment is already Big-endian, then the returned value is not byteswapped.
| x | A short integer. |
Definition at line 131 of file ext_byteorder.h.
| #define BYTEORDER_MSBW32 | ( | x | ) | BYTEORDER_SWAPW32(x) |
Switch the byte ordering of an integer from the native swapping to Big-endian (Most Significant Byte).
If the current environment is already Big-endian, then the returned value is not byteswapped.
| x | An integer. |
Definition at line 141 of file ext_byteorder.h.
| #define BYTEORDER_SWAPF32 byteorder_swapf32 |
Switch the byte ordering of a float.
| x | A float. |
Definition at line 56 of file ext_byteorder.h.
| #define BYTEORDER_SWAPF64 byteorder_swapf64 |
Switch the byte ordering of a double.
| x | A double. |
Definition at line 64 of file ext_byteorder.h.
| #define BYTEORDER_SWAPW16 | ( | x | ) | ((short)(((((unsigned short)(x))>>8)&0x00ff)+((((unsigned short)(x))<<8)&0xff00))) |
Switch the byte ordering of a short integer.
| x | A short integer. |
Definition at line 40 of file ext_byteorder.h.
| #define BYTEORDER_SWAPW32 | ( | x | ) |
((long)(((((unsigned long)(x))>>24L)&0x000000ff)+((((unsigned long)(x))>>8L)&0x0000ff00)+ \ ((((unsigned long)(x))<<24L)&0xff000000)+((((unsigned long)(x))<<8L)&0x00ff0000)))
Switch the byte ordering of an integer.
| x | An integer. |
Definition at line 48 of file ext_byteorder.h.
| #define C74_BIG_ENDIAN 0 |
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.
Definition at line 29 of file ext_byteorder.h.
| #define C74_LITTLE_ENDIAN 1 |
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.
Definition at line 21 of file ext_byteorder.h.