Linux 2.6 - man page for memcmp (linux section 3posix)
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MEMCMP(P) POSIX Programmer's Manual MEMCMP(P)
memcmp - compare bytes in memory
int memcmp(const void *s1, const void *s2, size_t n);
The memcmp() function shall compare the first n bytes (each interpreted as unsigned char)
of the object pointed to by s1 to the first n bytes of the object pointed to by s2.
The sign of a non-zero return value shall be determined by the sign of the difference
between the values of the first pair of bytes (both interpreted as type unsigned char)
that differ in the objects being compared.
The memcmp() function shall return an integer greater than, equal to, or less than 0, if
the object pointed to by s1 is greater than, equal to, or less than the object pointed to
by s2, respectively.
No errors are defined.
The following sections are informative.
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 orig-
inal Standard can be obtained online at http://www.opengroup.org/unix/online.html .
IEEE/The Open Group 2003 MEMCMP(P)
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