BCMP(P) POSIX Programmer's Manual BCMP(P)
bcmp - memory operations (LEGACY)
int bcmp(const void *s1, const void *s2, size_t n);
The bcmp() function shall compare the first n bytes of the area pointed to by s1 with the
area pointed to by s2.
The bcmp() function shall return 0 if s1 and s2 are identical; otherwise, it shall return
non-zero. Both areas are assumed to be n bytes long. If the value of n is 0, bcmp() shall
No errors are defined.
The following sections are informative.
The memcmp() function is preferred over this function.
For maximum portability, it is recommended to replace the function call to bcmp() as fol-
#define bcmp(b1,b2,len) memcmp((b1), (b2), (size_t)(len))
This function may be withdrawn in a future version.
memcmp() , the Base Definitions volume of IEEE Std 1003.1-2001, <strings.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 BCMP(P)