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Annotation of src/lib/libc/gen/isalpha.3, Revision 1.2

1.1       cgd         1: .\" Copyright (c) 1991 The Regents of the University of California.
                      2: .\" All rights reserved.
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                      4: .\" This code is derived from software contributed to Berkeley by
                      5: .\" the American National Standards Committee X3, on Information
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1.2     ! mycroft    36: .\"     from: @(#)isalpha.3    5.2 (Berkeley) 6/29/91
        !            37: .\"    $Id: $
1.1       cgd        38: .\"
                     39: .Dd June 29, 1991
                     40: .Dt ISALPHA 3
                     41: .Os
                     42: .Sh NAME
                     43: .Nm isalpha
                     44: .Nd alphabetic character test
                     45: .Sh SYNOPSIS
                     46: .Fd #include <ctype.h>
                     47: .Ft int
                     48: .Fn isalpha "int c"
                     49: .Sh DESCRIPTION
                     50: The
                     51: .Fn isalpha
                     52: function tests for any character for which
                     53: .Xr isupper 3
                     54: or
                     55: .Xr islower 3
                     56: is true and
                     57: .\" , or any of an implementation-defined set of characters
                     58: for which none of
                     59: .Xr iscntrl 3 ,
                     60: .Xr isdigit 3 ,
                     61: .Xr ispunct 3 ,
                     62: or
                     63: .Xr isspace 3
                     64: is true.
                     65: In the
                     66: .Em ``C''
                     67: locale,
                     68: .Fn isalpha
                     69: returns true only for the characters for which
                     70: .Xr isupper 3
                     71: or
                     72: .Xr islower 3
                     73: is true.
                     74: .Sh RETURN VALUES
                     75: The
                     76: .Fn isalpha
                     77: macro returns zero if the character tests false and
                     78: returns non-zero if the character tests true.
                     79: .Sh SEE ALSO
                     80: .Xr isascii 3 ,
                     81: .Xr isalnum 3 ,
                     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 ,
                     91: .Xr toascii 3 ,
                     92: .Xr tolower 3 ,
                     93: .Xr toupper 3 ,
                     94: .Xr stdio 3
                     95: .Xr ascii 7
                     96: .Sh STANDARDS
                     97: The
                     98: .Fn isalpha
                     99: function conforms to
                    100: .St -ansiC .

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