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Inside Macintosh: Networking With Open Transport / Part 2 - Open Transport Reference

Chapter 27 - Utilities Reference / Functions

Memory Manipulation Utility Functions /

OTMemcpy

Copies data from one memory location to another memory location.

C INTERFACE

void OTMemcpy       (void* dest,
                     const void* src,
                     size_t nBytes)

C++ INTERFACE

None. C++ applications use the C interface to this function.

PARAMETERS

dest

A pointer to the location into which you are copying memory.

src

A pointer to the location from which you are copying memory.

nBytes

The number of bytes of memory you want to copy.

DISCUSSION

You can use this function for all memory operations except where

• the source or destination locations hold uncached memory. In these cases, the Mac OS function BlockMoveDataUncached is much faster.

• the source and destination areas overlap.

  Use the OTMemmove function to copy data where the source and destination areas overlap. Otherwise use OTMemcpy because it is faster.

To compare the contents of two memory areas, use the OTMemcmp function.