BSTRING(3C) Standard C Library Functions BSTRING(3C)
NAME
bstring, bcopy, bcmp, bzero, explicit_bzero - memory operations
SYNOPSIS
#include <strings.h>
void bcopy(
const void *s1,
void *s2,
size_t n);
int bcmp(
const void *s1,
const void *s2,
size_t n);
void bzero(
void *s,
size_t n);
void explicit_bzero(
void *s,
size_t n);
DESCRIPTION
The
bcopy(),
bcmp(), and
bzero() functions operate as efficiently as
possible on memory areas (arrays of bytes bounded by a count, not
terminated by a null character). They do not check for the overflow
of any receiving memory area. These functions are similar to the
memcpy(),
memcmp(), and
memset() functions described on the
memory(3C) manual page.
The
bcopy() function copies
n bytes from memory area
s1 to
s2. Copying
between objects that overlap will take place correctly.
The
bcmp() function compares the first
n bytes of its arguments,
returning 0 if they are identical and 1 otherwise. The
bcmp() function
always returns 0 when
n is 0.
The
bzero() function sets the first
n bytes in memory area
s to 0.
The
explicit_bzero() function behaves the same as
bzero(), except it
should not be removed by the compiler's optimization passes.
WARNINGS
The
bcopy() and
explicit_bzero() functions take parameters backwards from
memcmp(). See
memory(3C).
ATTRIBUTES
See
attributes(7) for descriptions of the following attributes:
+--------------------+-----------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-----------------+
|Interface Stability | See NOTES |
+--------------------+-----------------+
|MT-Level | MT-Safe |
+--------------------+-----------------+
SEE ALSO
memory(3C),
attributes(7),
standards(7)NOTES
bcopy(),
bcmp(), and
bzero() are
STANDARD.
explicit_bzero() is
COMMITTED.
December 31, 2014
BSTRING(3C)