locale/FreeBSD/digittoint.3

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  28 .\"     @(#)digittoint.3        8.1 (Berkeley) 6/4/93
  29 .\" $FreeBSD: src/lib/libc/locale/digittoint.3,v 1.6 2009/09/04 07:44:58 des Exp $
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  31 .Dd April 6, 2001
  32 .Dt DIGITTOINT 3
  33 .Os
  34 .Sh NAME
  35 .Nm digittoint
  36 .Nd convert a numeric character to its integer value
  37 .Sh LIBRARY
  38 .Lb libc
  39 .Sh SYNOPSIS
  40 .In ctype.h
  41 .Ft int
  42 .Fn digittoint "int c"
  43 .Sh DESCRIPTION
  44 The
  45 .Fn digittoint
  46 function converts a numeric character to its corresponding integer value.
  47 The character can be any decimal digit or hexadecimal digit.
  48 With hexadecimal characters, the case of the values does not matter.
  49 .Sh RETURN VALUES
  50 The
  51 .Fn digittoint
  52 function always returns an integer from the range of 0 to 15.
  53 If the given character was not a digit as defined by
  54 .Xr isxdigit 3 ,
  55 the function will return 0.
  56 .Sh SEE ALSO
  57 .Xr ctype 3 ,
  58 .Xr isdigit 3 ,
  59 .Xr isxdigit 3