BSTRING(3C) Standard C Library Functions BSTRING(3C)
bstring, bcopy, bcmp, bzero, explicit_bzero - memory operations
#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);
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.
The bcopy() and explicit_bzero() functions take parameters backwards
from memcmp(). See memory(3C).
See attributes(7) for descriptions of the following attributes:
+--------------------+-----------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-----------------+
|Interface Stability | See NOTES |
+--------------------+-----------------+
|MT-Level | MT-Safe |
+--------------------+-----------------+
memory(3C), attributes(7), standards(7)
bcopy(), bcmp(), and bzero() are STANDARD. explicit_bzero() is
COMMITTED.
December 31, 2014 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)