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(5) for descriptions of the following attributes:


+--------------------+-----------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-----------------+
|Interface Stability | See NOTES |
+--------------------+-----------------+
|MT-Level | MT-Safe |
+--------------------+-----------------+

SEE ALSO


memory(3C), attributes(5), standards(5)

NOTES


bcopy(), bcmp(), and bzero() are STANDARD. explicit_bzero() is
COMMITTED.


December 31, 2014 BSTRING(3C)