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dc36d6f9bb
Remove ancient SCCS tags from the tree, automated scripting, with two minor fixup to keep things compiling. All the common forms in the tree were removed with a perl script. Sponsored by: Netflix
131 lines
4.4 KiB
Groff
131 lines
4.4 KiB
Groff
.\" Copyright (c) 1991, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" This code is derived from software contributed to Berkeley by
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.\" the American National Standards Committee X3, on Information
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.\" Processing Systems.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.Dd December 19, 2022
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.Dt ISALNUM 3
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.Os
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.Sh NAME
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.Nm isalnum ,
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.Nm isalnum_l
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.Nd alphanumeric character test
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.Sh LIBRARY
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.Lb libc
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.Sh SYNOPSIS
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.In ctype.h
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.Ft int
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.Fn isalnum "int c"
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.Ft int
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.Fn isalnum_l "int c" "locale_t loc"
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.Sh DESCRIPTION
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The
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.Fn isalnum
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and
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.Fn isalnum_l
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functions test for any character for which
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.Xr isalpha 3 ,
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.Xr isalpha_l 3
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or
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.Xr isdigit 3 ,
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.Xr isdigit_l 3
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is true.
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The value of the argument must be representable as an
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.Vt "unsigned char"
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or the value of
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.Dv EOF .
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.Pp
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In the ASCII character set, this includes the following characters
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(with their numeric values shown in octal):
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.Bl -column \&000_``0''__ \&000_``0''__ \&000_``0''__ \&000_``0''__ \&000_``0''__
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.It "\&060\ ``0''" Ta "061\ ``1''" Ta "062\ ``2''" Ta "063\ ``3''" Ta "064\ ``4''"
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.It "\&065\ ``5''" Ta "066\ ``6''" Ta "067\ ``7''" Ta "070\ ``8''" Ta "071\ ``9''"
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.It "\&101\ ``A''" Ta "102\ ``B''" Ta "103\ ``C''" Ta "104\ ``D''" Ta "105\ ``E''"
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.It "\&106\ ``F''" Ta "107\ ``G''" Ta "110\ ``H''" Ta "111\ ``I''" Ta "112\ ``J''"
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.It "\&113\ ``K''" Ta "114\ ``L''" Ta "115\ ``M''" Ta "116\ ``N''" Ta "117\ ``O''"
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.It "\&120\ ``P''" Ta "121\ ``Q''" Ta "122\ ``R''" Ta "123\ ``S''" Ta "124\ ``T''"
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.It "\&125\ ``U''" Ta "126\ ``V''" Ta "127\ ``W''" Ta "130\ ``X''" Ta "131\ ``Y''"
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.It "\&132\ ``Z''" Ta "141\ ``a''" Ta "142\ ``b''" Ta "143\ ``c''" Ta "144\ ``d''"
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.It "\&145\ ``e''" Ta "146\ ``f''" Ta "147\ ``g''" Ta "150\ ``h''" Ta "151\ ``i''"
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.It "\&152\ ``j''" Ta "153\ ``k''" Ta "154\ ``l''" Ta "155\ ``m''" Ta "156\ ``n''"
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.It "\&157\ ``o''" Ta "160\ ``p''" Ta "161\ ``q''" Ta "162\ ``r''" Ta "163\ ``s''"
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.It "\&164\ ``t''" Ta "165\ ``u''" Ta "166\ ``v''" Ta "167\ ``w''" Ta "170\ ``x''"
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.It "\&171\ ``y''" Ta "172\ ``z''" Ta \& Ta \& Ta \&
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.El
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.Pp
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The
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.Fn isalnum_l
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function takes an explicit locale argument, whereas the
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.Fn isalnum
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function uses the current global or per-thread locale.
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.Sh RETURN VALUES
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The
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.Fn isalnum
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and
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.Fn isalnum_l
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functions return zero if the character tests false and
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return non-zero if the character tests true.
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.Sh COMPATIBILITY
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The
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.Bx 4.4
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extension of accepting arguments outside of the range of the
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.Vt "unsigned char"
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type in locales with large character sets is considered obsolete
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and may not be supported in future releases.
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The
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.Fn iswalnum
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or
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.Fn iswalnum_l
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function should be used instead.
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.Sh SEE ALSO
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.Xr ctype 3 ,
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.Xr ctype_l 3 ,
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.Xr isalpha 3 ,
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.Xr isalpha_l 3 ,
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.Xr isdigit 3 ,
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.Xr isdigit_l 3 ,
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.Xr iswalnum 3 ,
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.Xr iswalnum_l 3 ,
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.Xr xlocale 3 ,
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.Xr ascii 7
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.Sh STANDARDS
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The
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.Fn isalnum
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function conforms to
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.St -isoC .
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The
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.Fn isalnum_l
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function conforms to
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.St -p1003.1-2008 .
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.Sh HISTORY
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The
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.Fn isalnum
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function first appeared in
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.At v7 .
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