locale/FreeBSD/digittoint.3

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  32 .\"     @(#)digittoint.3        8.1 (Berkeley) 6/4/93
  33 .\" $FreeBSD: src/lib/libc/locale/digittoint.3,v 1.3 2004/03/30 07:19:35 tjr Exp $
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  35 .Dd April 6, 2001
  36 .Dt DIGITTOINT 3
  37 .Os
  38 .Sh NAME
  39 .Nm digittoint
  40 .Nd convert a numeric character to its integer value
  41 .Sh LIBRARY
  42 .Lb libc
  43 .Sh SYNOPSIS
  44 .In ctype.h
  45 .Ft int
  46 .Fn digittoint "int c"
  47 .Sh DESCRIPTION
  48 The
  49 .Fn digittoint
  50 function converts a numeric character to its corresponding integer value.
  51 The character can be any decimal digit or hexadecimal digit.
  52 With hexadecimal characters, the case of the values does not matter.
  53 .Sh RETURN VALUES
  54 The
  55 .Fn digittoint
  56 function always returns an integer from the range of 0 to 15.
  57 If the given character was not a digit as defined by
  58 .Xr isxdigit 3 ,
  59 the function will return 0.
  60 .Sh SEE ALSO
  61 .Xr ctype 3 ,
  62 .Xr isdigit 3 ,
  63 .Xr isxdigit 3