#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:

memory (3C), attributes (7), standards (7)

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