The memccpy() function shall copy bytes from memory area s2
into s1, stopping after the first occurrence of
byte c (converted to an unsigned char) is copied, or after
n bytes are copied, whichever comes first. If
copying takes place between objects that overlap, the behavior is
The memccpy() function shall return a pointer to the byte after
the copy of c in s1, or a null pointer if
c was not found in the first n bytes of s2.
No errors are defined.
The following sections are informative.
The memccpy() function does not check for the overflow of the
receiving memory area.
The Base Definitions volume of IEEE Std 1003.1-2001, <string.h>
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
-- Portable Operating System Interface (POSIX), The Open Group Base
Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
Electrical and Electronics Engineers, Inc and The Open Group. In the
event of any discrepancy between this version and the original IEEE and
The Open Group Standard, the original IEEE and The Open Group Standard
is the referee document. The original Standard can be obtained online at