sdi_swap(D3sdi)

sdi_swap16, sdi_swap24, sdi_swap32 -- swaps bytes in a 16-, 24-, or 32-bit data type

Synopsis

   #include <sys/sdi.h>

   short sdi_swap16(unsigned int arg);
   

   int sdi_swap24(unsigned int arg);
   

   long sdi_swap32(unsigned long arg);

Description

sdi_swap16- swap bytes in a 16-bit data type

sdi_swap24- swap bytes in a 24-bit data type

sdi_swap34- swap bytes in a 34-bit data type

sdi_swap16 swaps the two bytes of the 16-bit argument, arg, and returns the swapped result.

sdi_swap24 swaps the three bytes of the 24-bit argument, arg, and returns the swapped result.

sdi_swap32 swaps the four bytes of the 32-bit argument, arg, and returns the swapped result.

Arguments

arg: value to be swapped

Return values

The return value is the value of the swapped argument.

Usage

This function is typically used by HBA drivers to convert 16-, 24-, or 32-bit binary values for a control block, returned by or sent to the Host Adapter, when the byte orientation of the Intel x86 CPU and the Host Adapter card are opposite.

Context and synchronization

Non-blockable context.

Applicable hardware

x86/Pentium compatible architectures

Version applicability

sdi: 1, 2, 3, 4 HBA and target drivers.

Differences between versions

Similar functions for the SCO OpenServer 5 SCSI interface are documented on the scsi(D3osdi) manual page.