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Annotation of src/lib/libc/gen/isalpha.3, Revision 1.1

1.1     ! cgd         1: .\" Copyright (c) 1991 The Regents of the University of California.
        !             2: .\" All rights reserved.
        !             3: .\"
        !             4: .\" This code is derived from software contributed to Berkeley by
        !             5: .\" the American National Standards Committee X3, on Information
        !             6: .\" Processing Systems.
        !             7: .\"
        !             8: .\" Redistribution and use in source and binary forms, with or without
        !             9: .\" modification, are permitted provided that the following conditions
        !            10: .\" are met:
        !            11: .\" 1. Redistributions of source code must retain the above copyright
        !            12: .\"    notice, this list of conditions and the following disclaimer.
        !            13: .\" 2. Redistributions in binary form must reproduce the above copyright
        !            14: .\"    notice, this list of conditions and the following disclaimer in the
        !            15: .\"    documentation and/or other materials provided with the distribution.
        !            16: .\" 3. All advertising materials mentioning features or use of this software
        !            17: .\"    must display the following acknowledgement:
        !            18: .\"    This product includes software developed by the University of
        !            19: .\"    California, Berkeley and its contributors.
        !            20: .\" 4. Neither the name of the University nor the names of its contributors
        !            21: .\"    may be used to endorse or promote products derived from this software
        !            22: .\"    without specific prior written permission.
        !            23: .\"
        !            24: .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            25: .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            26: .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            27: .\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            28: .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            29: .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            30: .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            31: .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            32: .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            33: .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            34: .\" SUCH DAMAGE.
        !            35: .\"
        !            36: .\"     @(#)isalpha.3  5.2 (Berkeley) 6/29/91
        !            37: .\"
        !            38: .Dd June 29, 1991
        !            39: .Dt ISALPHA 3
        !            40: .Os
        !            41: .Sh NAME
        !            42: .Nm isalpha
        !            43: .Nd alphabetic character test
        !            44: .Sh SYNOPSIS
        !            45: .Fd #include <ctype.h>
        !            46: .Ft int
        !            47: .Fn isalpha "int c"
        !            48: .Sh DESCRIPTION
        !            49: The
        !            50: .Fn isalpha
        !            51: function tests for any character for which
        !            52: .Xr isupper 3
        !            53: or
        !            54: .Xr islower 3
        !            55: is true and
        !            56: .\" , or any of an implementation-defined set of characters
        !            57: for which none of
        !            58: .Xr iscntrl 3 ,
        !            59: .Xr isdigit 3 ,
        !            60: .Xr ispunct 3 ,
        !            61: or
        !            62: .Xr isspace 3
        !            63: is true.
        !            64: In the
        !            65: .Em ``C''
        !            66: locale,
        !            67: .Fn isalpha
        !            68: returns true only for the characters for which
        !            69: .Xr isupper 3
        !            70: or
        !            71: .Xr islower 3
        !            72: is true.
        !            73: .Sh RETURN VALUES
        !            74: The
        !            75: .Fn isalpha
        !            76: macro returns zero if the character tests false and
        !            77: returns non-zero if the character tests true.
        !            78: .Sh SEE ALSO
        !            79: .Xr isascii 3 ,
        !            80: .Xr isalnum 3 ,
        !            81: .Xr iscntrl 3 ,
        !            82: .Xr isdigit 3 ,
        !            83: .Xr isgraph 3 ,
        !            84: .Xr islower 3 ,
        !            85: .Xr isprint 3 ,
        !            86: .Xr ispunct 3 ,
        !            87: .Xr isspace 3 ,
        !            88: .Xr isupper 3 ,
        !            89: .Xr isxdigit 3 ,
        !            90: .Xr toascii 3 ,
        !            91: .Xr tolower 3 ,
        !            92: .Xr toupper 3 ,
        !            93: .Xr stdio 3
        !            94: .Xr ascii 7
        !            95: .Sh STANDARDS
        !            96: The
        !            97: .Fn isalpha
        !            98: function conforms to
        !            99: .St -ansiC .

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