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.\"	@(#)digittoint.3	8.1 (Berkeley) 6/4/93
.\" $FreeBSD: release/9.1.0/lib/libc/locale/digittoint.3 237216 2012-06-18 04:55:07Z eadler $
.\"
.Dd April 6, 2001
.Dt DIGITTOINT 3
.Os
.Sh NAME
.Nm digittoint
.Nd convert a numeric character to its integer value
.Sh LIBRARY
.Lb libc
.Sh SYNOPSIS
.In ctype.h
.Ft int
.Fn digittoint "int c"
.Ft int
.Fn digittoint_l "int c" "locale_t loc"
.Sh DESCRIPTION
The
.Fn digittoint
function converts a numeric character to its corresponding integer value.
The character can be any decimal digit or hexadecimal digit.
With hexadecimal characters, the case of the values does not matter.
.Pp
The
.Fn digittoint_l
function takes an explicit locale argument, whereas the
.Fn digittoint
function use the current global or per-thread locale.
.Sh RETURN VALUES
The
.Fn digittoint
function always returns an integer from the range of 0 to 15.
If the given character was not a digit as defined by
.Xr isxdigit 3 ,
the function will return 0.
.Sh SEE ALSO
.Xr ctype 3 ,
.Xr isdigit 3 ,
.Xr isxdigit 3,
.Xr xlocale 3