Libc-825.24.tar.gz

[apple/libc.git] / locale / digittoint.3

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-.\" Copyright (c) 1993
-.\"    The Regents of the University of California.  All rights reserved.
-.\"
-.\" Redistribution and use in source and binary forms, with or without
-.\" modification, are permitted provided that the following conditions
-.\" are met:
-.\" 1. Redistributions of source code must retain the above copyright
-.\"    notice, this list of conditions and the following disclaimer.
-.\" 2. Redistributions in binary form must reproduce the above copyright
-.\"    notice, this list of conditions and the following disclaimer in the
-.\"    documentation and/or other materials provided with the distribution.
-.\" 4. Neither the name of the University nor the names of its contributors
-.\"    may be used to endorse or promote products derived from this software
-.\"    without specific prior written permission.
-.\"
-.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
-.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
-.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-.\" SUCH DAMAGE.
-.\"
-.\"    @(#)digittoint.3        8.1 (Berkeley) 6/4/93
-.\" $FreeBSD: src/lib/libc/locale/digittoint.3,v 1.6 2009/09/04 07:44:58 des Exp $
-.\"
-.Dd April 6, 2001
-.Dt DIGITTOINT 3
-.Os
-.Sh NAME
-.Nm digittoint ,
-.Nm digittoint_l
-.Nd convert a numeric character to its integer value
-.Sh LIBRARY
-.Lb libc
-.Sh SYNOPSIS
-.In ctype.h
-.Ft int
-.Fo digittoint
-.Fa "int c"
-.Fc
-.In xlocale.h
-.In ctype.h
-.Ft int
-.Fo digittoint_l
-.Fa "int c"
-.Fa "locale_t loc"
-.Fc
-.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
-While the
-.Fn digittoint
-function uses the current locale, the
-.Fn digittoint_l
-function may be passed a locale directly. See
-.Xr xlocale 3
-for more information.
-.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