string/FreeBSD/memcpy.3.patch

   1 --- memcpy.3.orig       Fri May 28 17:44:25 2004
   2 +++ memcpy.3    Fri May 28 17:45:22 2004
   3 @@ -41,7 +41,7 @@
   4  .Os
   5  .Sh NAME
   6  .Nm memcpy
   7 -.Nd copy byte string
   8 +.Nd copy memory area
   9  .Sh LIBRARY
  10  .Lb libc
  11  .Sh SYNOPSIS
  12 @@ -54,10 +54,22 @@
  13  function
  14  copies
  15  .Fa len
  16 -bytes from string
  17 +bytes from memory area
  18  .Fa src
  19 -to string
  20 +to memory area
  21  .Fa dst .
  22 +If
  23 +.Fa src
  24 +and
  25 +.Fa dst
  26 +overlap, behavior is undefined.
  27 +Applications in which
  28 +.Fa src
  29 +and
  30 +.Fa dst
  31 +might overlap should use
  32 +.Xr memmove 3
  33 +instead.
  34  .Sh RETURN VALUES
  35  The
  36  .Fn memcpy
  37 @@ -75,17 +87,3 @@
  38  function
  39  conforms to
  40  .St -isoC .
  41 -.Sh BUGS
  42 -In this implementation
  43 -.Fn memcpy
  44 -is implemented using
  45 -.Xr bcopy 3 ,
  46 -and therefore the strings may overlap.
  47 -On other systems, copying overlapping strings may produce surprises.
  48 -Programs intended to be portable should use
  49 -.Xr memmove 3
  50 -when
  51 -.Fa src
  52 -and
  53 -.Fa dst
  54 -may overlap.