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bcopy(3) [bsd man page]

BSTRING(3)						     Library Functions Manual							BSTRING(3)

NAME
bcopy, bcmp, bzero, ffs - bit and byte string operations SYNOPSIS
bcopy(src, dst, length) char *src, *dst; int length; bcmp(b1, b2, length) char *b1, *b2; int length; bzero(b, length) char *b; int length; ffs(i) long i; DESCRIPTION
The functions bcopy, bcmp, and bzero operate on variable length strings of bytes. They do not check for null bytes as the routines in string(3) do. Bcopy copies length bytes from string src to the string dst. Bcmp compares byte string b1 against byte string b2, returning zero if they are identical, non-zero otherwise. Both strings are assumed to be length bytes long. Bzero places length 0 bytes in the string b1. Ffs find the first bit set in the argument passed it and returns the index of that bit. Bits are numbered starting at 1. A return value of 0 indicates the value passed is zero. BUGS
The bcopy routine take parameters backwards from strcpy. 4.2 Berkeley Distribution May 15, 1985 BSTRING(3)

Check Out this Related Man Page

BSTRING(3)						   BSD Library Functions Manual 						BSTRING(3)

NAME
bcmp, bcopy, bzero, memccpy, memchr, memcmp, memcpy, memmove, memset -- byte string operations LIBRARY
Standard C Library (libc, -lc) SYNOPSIS
#include <string.h> int bcmp(const void *b1, const void *b2, size_t len); void bcopy(const void *src, void *dst, size_t len); void bzero(void *b, size_t len); void * memchr(const void *b, int c, size_t len); int memcmp(const void *b1, const void *b2, size_t len); void * memccpy(void *dst, const void *src, int c, size_t len); void * memcpy(void *dst, const void *src, size_t len); void * memmove(void *dst, const void *src, size_t len); void * memset(void *b, int c, size_t len); DESCRIPTION
These functions operate on variable length strings of bytes. They do not check for terminating null bytes as the routines listed in string(3) do. See the specific manual pages for more information. SEE ALSO
bcmp(3), bcopy(3), bzero(3), memccpy(3), memchr(3), memcmp(3), memcpy(3), memmove(3), memset(3) STANDARDS
The functions memchr(), memcmp(), memcpy(), memmove(), and memset() conform to ISO/IEC 9899:1990 (``ISO C90''). HISTORY
The functions bzero() and memccpy() appeared in 4.3BSD; the functions bcmp(), bcopy(), appeared in 4.2BSD. BSD
June 4, 1993 BSD
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