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Annotation of src/lib/libc/gen/isalpha.3, Revision 1.5

1.5     ! perry       1: .\"    $NetBSD: isalpha.3,v 1.4 1995/02/27 04:34:28 cgd Exp $
1.4       cgd         2: .\"
1.1       cgd         3: .\" Copyright (c) 1991 The Regents of the University of California.
                      4: .\" All rights reserved.
                      5: .\"
                      6: .\" This code is derived from software contributed to Berkeley by
                      7: .\" the American National Standards Committee X3, on Information
                      8: .\" Processing Systems.
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                     10: .\" Redistribution and use in source and binary forms, with or without
                     11: .\" modification, are permitted provided that the following conditions
                     12: .\" are met:
                     13: .\" 1. Redistributions of source code must retain the above copyright
                     14: .\"    notice, this list of conditions and the following disclaimer.
                     15: .\" 2. Redistributions in binary form must reproduce the above copyright
                     16: .\"    notice, this list of conditions and the following disclaimer in the
                     17: .\"    documentation and/or other materials provided with the distribution.
                     18: .\" 3. All advertising materials mentioning features or use of this software
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                     20: .\"    This product includes software developed by the University of
                     21: .\"    California, Berkeley and its contributors.
                     22: .\" 4. Neither the name of the University nor the names of its contributors
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                     26: .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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1.4       cgd        38: .\"     @(#)isalpha.3  5.2 (Berkeley) 6/29/91
1.1       cgd        39: .\"
                     40: .Dd June 29, 1991
                     41: .Dt ISALPHA 3
                     42: .Os
                     43: .Sh NAME
                     44: .Nm isalpha
                     45: .Nd alphabetic character test
1.5     ! perry      46: .Sh LIBRARY
        !            47: .Lb libc
1.1       cgd        48: .Sh SYNOPSIS
                     49: .Fd #include <ctype.h>
                     50: .Ft int
                     51: .Fn isalpha "int c"
                     52: .Sh DESCRIPTION
                     53: The
                     54: .Fn isalpha
                     55: function tests for any character for which
                     56: .Xr isupper 3
                     57: or
                     58: .Xr islower 3
                     59: is true and
                     60: .\" , or any of an implementation-defined set of characters
                     61: for which none of
                     62: .Xr iscntrl 3 ,
                     63: .Xr isdigit 3 ,
                     64: .Xr ispunct 3 ,
                     65: or
                     66: .Xr isspace 3
                     67: is true.
                     68: In the
                     69: .Em ``C''
                     70: locale,
                     71: .Fn isalpha
                     72: returns true only for the characters for which
                     73: .Xr isupper 3
                     74: or
                     75: .Xr islower 3
                     76: is true.
                     77: .Sh RETURN VALUES
                     78: The
                     79: .Fn isalpha
                     80: macro returns zero if the character tests false and
                     81: returns non-zero if the character tests true.
                     82: .Sh SEE ALSO
1.3       jtc        83: .Xr isalnum 3 ,
1.1       cgd        84: .Xr isascii 3 ,
1.3       jtc        85: .Xr isblank 3 ,
1.1       cgd        86: .Xr iscntrl 3 ,
                     87: .Xr isdigit 3 ,
                     88: .Xr isgraph 3 ,
                     89: .Xr islower 3 ,
                     90: .Xr isprint 3 ,
                     91: .Xr ispunct 3 ,
                     92: .Xr isspace 3 ,
                     93: .Xr isupper 3 ,
                     94: .Xr isxdigit 3 ,
                     95: .Xr toascii 3 ,
                     96: .Xr tolower 3 ,
                     97: .Xr toupper 3 ,
1.3       jtc        98: .Xr stdio 3 ,
1.1       cgd        99: .Xr ascii 7
                    100: .Sh STANDARDS
                    101: The
                    102: .Fn isalpha
                    103: function conforms to
                    104: .St -ansiC .

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