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Annotation of src/lib/libc/gen/isalpha.3, Revision 1.11

1.11    ! agc         1: .\"    $NetBSD: isalpha.3,v 1.10 2003/04/16 13:34:37 wiz Exp $
1.4       cgd         2: .\"
1.1       cgd         3: .\" Copyright (c) 1991 The Regents of the University of California.
                      4: .\" All rights reserved.
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                      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
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                     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.
1.11    ! agc        18: .\" 3. Neither the name of the University nor the names of its contributors
1.1       cgd        19: .\"    may be used to endorse or promote products derived from this software
                     20: .\"    without specific prior written permission.
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                     22: .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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1.4       cgd        34: .\"     @(#)isalpha.3  5.2 (Berkeley) 6/29/91
1.1       cgd        35: .\"
                     36: .Dd June 29, 1991
                     37: .Dt ISALPHA 3
                     38: .Os
                     39: .Sh NAME
                     40: .Nm isalpha
                     41: .Nd alphabetic character test
1.5       perry      42: .Sh LIBRARY
                     43: .Lb libc
1.1       cgd        44: .Sh SYNOPSIS
1.10      wiz        45: .In ctype.h
1.6       wiz        46: .Ft int
1.1       cgd        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.
1.6       wiz        64: In the
1.1       cgd        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
1.3       jtc        79: .Xr isalnum 3 ,
1.1       cgd        80: .Xr isascii 3 ,
1.3       jtc        81: .Xr isblank 3 ,
1.1       cgd        82: .Xr iscntrl 3 ,
                     83: .Xr isdigit 3 ,
                     84: .Xr isgraph 3 ,
                     85: .Xr islower 3 ,
                     86: .Xr isprint 3 ,
                     87: .Xr ispunct 3 ,
                     88: .Xr isspace 3 ,
                     89: .Xr isupper 3 ,
                     90: .Xr isxdigit 3 ,
1.7       wiz        91: .Xr stdio 3 ,
1.1       cgd        92: .Xr toascii 3 ,
                     93: .Xr tolower 3 ,
                     94: .Xr toupper 3 ,
                     95: .Xr ascii 7
                     96: .Sh STANDARDS
                     97: The
                     98: .Fn isalpha
                     99: function conforms to
                    100: .St -ansiC .
1.9       yamt      101: .Sh CAVEATS
                    102: The argument to
                    103: .Fn isalpha
                    104: must be
                    105: .Dv EOF
                    106: or representable as an
                    107: .Li unsigned char ;
                    108: otherwise, the result is undefined.

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