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Annotation of 43BSDReno/lib/libc/string/memcpy.3, revision 1.1.1.1

1.1       root        1: .\" Copyright (c) 1990 The Regents of the University of California.
                      2: .\" All rights reserved.
                      3: .\"
                      4: .\" This code is derived from software contributed to Berkeley by
                      5: .\" Chris Torek.
                      6: .\"
                      7: .\" Redistribution and use in source and binary forms are permitted provided
                      8: .\" that: (1) source distributions retain this entire copyright notice and
                      9: .\" comment, and (2) distributions including binaries display the following
                     10: .\" acknowledgement:  ``This product includes software developed by the
                     11: .\" University of California, Berkeley and its contributors'' in the
                     12: .\" documentation or other materials provided with the distribution and in
                     13: .\" all advertising materials mentioning features or use of this software.
                     14: .\" Neither the name of the University nor the names of its contributors may
                     15: .\" be used to endorse or promote products derived from this software without
                     16: .\" specific prior written permission.
                     17: .\" THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
                     18: .\" WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
                     19: .\" MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
                     20: .\"
                     21: .\"    @(#)memcpy.3    5.2 (Berkeley) 6/24/90
                     22: .\"
                     23: .TH MEMCPY 3 "June 24, 1990"
                     24: .UC 7
                     25: .SH NAME
                     26: memcpy \- copy byte string
                     27: .SH SYNOPSIS
                     28: .nf
                     29: .ft B
                     30: #include <string.h>
                     31: 
                     32: void *
                     33: memcpy(void *dst, const void *src, size_t len);
                     34: .ft R
                     35: .fi
                     36: .SH DESCRIPTION
                     37: .B Memcpy
                     38: copies
                     39: .I len
                     40: bytes from string
                     41: .I src
                     42: to string
                     43: .I dst
                     44: and returns the original value of
                     45: .IR dst .
                     46: .SH SEE ALSO
                     47: bcopy(3), memccpy(3), memmove(3), strcpy(3)
                     48: .SH STANDARDS
                     49: .IR Memcpy
                     50: conforms to ANSI X3.159-1989 (``ANSI C'').
                     51: .SH BUGS
                     52: In this implementation
                     53: .B memcpy
                     54: is implemented using
                     55: .IR bcopy (3),
                     56: and therefore the strings may overlap.
                     57: On other systems, copying overlapping strings may produce surprises.
                     58: A simpler solution is to not use
                     59: .IR memcpy .

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