string/FreeBSD/bcmp.3

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  30 .\"     @(#)bcmp.3      8.1 (Berkeley) 6/4/93
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  33 .Dd August 15, 2016
  34 .Dt BCMP 3
  35 .Os
  36 .Sh NAME
  37 .Nm bcmp
  38 .Nd compare byte string
  39 .Sh LIBRARY
  40 .Lb libc
  41 .Sh SYNOPSIS
  42 .In strings.h
  43 .Ft int
  44 .Fn bcmp "const void *b1" "const void *b2" "size_t len"
  45 .Sh DESCRIPTION
  46 The
  47 .Fn bcmp
  48 function
  49 compares byte string
  50 .Fa b1
  51 against byte string
  52 .Fa b2 ,
  53 returning zero if they are identical, non-zero otherwise.
  54 Both strings are assumed to be
  55 .Fa len
  56 bytes long.
  57 Zero-length strings are always identical.
  58 .Pp
  59 The strings may overlap.
  60 .Sh SEE ALSO
  61 .Xr memcmp 3 ,
  62 .Xr strcasecmp 3 ,
  63 .Xr strcmp 3 ,
  64 .Xr strcoll 3 ,
  65 .Xr strxfrm 3 ,
  66 .Xr timingsafe_bcmp 3
  67 .Sh HISTORY
  68 A
  69 .Fn bcmp
  70 function first appeared in
  71 .Bx 4.2 .
  72 Its prototype existed previously in
  73 .In string.h
  74 before it was moved to
  75 .In strings.h
  76 for
  77 .St -p1003.1-2001
  78 compliance.