memcpy (original) (raw)

The Open Group Base Specifications Issue 6
IEEE Std 1003.1, 2004 Edition
Copyright © 2001-2004 The IEEE and The Open Group, All Rights reserved.

A newer edition of this document exists here

NAME

memcpy - copy bytes in memory

SYNOPSIS

`#include <string.h>

void *memcpy(void *restrict

s1, const void *restrict s2, size_t n);
`

DESCRIPTION

[CX] The functionality described on this reference page is aligned with the ISO C standard. Any conflict between the requirements described here and the ISO C standard is unintentional. This volume of IEEE Std 1003.1-2001 defers to the ISO C standard.

The memcpy() function shall copy n bytes from the object pointed to by s2 into the object pointed to by_s1_. If copying takes place between objects that overlap, the behavior is undefined.

RETURN VALUE

The memcpy() function shall return s1; no return value is reserved to indicate an error.

ERRORS

No errors are defined.

The following sections are informative.

EXAMPLES

None.

APPLICATION USAGE

The memcpy() function does not check for the overflow of the receiving memory area.

RATIONALE

None.

FUTURE DIRECTIONS

None.

SEE ALSO

The Base Definitions volume of IEEE Std 1003.1-2001, <string.h>

CHANGE HISTORY

First released in Issue 1. Derived from Issue 1 of the SVID.

Issue 6

The memcpy() prototype is updated for alignment with the ISO/IEC 9899:1999 standard.

End of informative text.

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