islower.3 revision 73088
Copyright (c) 1991, 1993
The Regents of the University of California. All rights reserved.
This code is derived from software contributed to Berkeley by
the American National Standards Committee X3, on Information
Processing Systems.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
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3. All advertising materials mentioning features or use of this software
must display the following acknowledgement:
This product includes software developed by the University of
California, Berkeley and its contributors.
4. Neither the name of the University nor the names of its contributors
may be used to endorse or promote products derived from this software
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THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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@(#)islower.3 8.1 (Berkeley) 6/4/93
$FreeBSD: head/lib/libc/locale/islower.3 73088 2001-02-26 13:23:47Z ru $
.Dd June 4, 1993 .Dt ISLOWER 3 .Os .Sh NAME .Nm islower .Nd lower-case character test .Sh LIBRARY .Lb libc .Sh SYNOPSIS .Fd #include <ctype.h> .Ft int .Fn islower "int c" .Sh DESCRIPTION The .Fn islower function tests for any lower-case letters. For single C .Va char Ns s locales (see .Xr multibyte 3 ) the value of the argument is representable as an .Li unsigned char or the value of .Dv EOF . In the ASCII character set, this includes the following characters (with their numeric values shown in octal):
The Regents of the University of California. All rights reserved.
This code is derived from software contributed to Berkeley by
the American National Standards Committee X3, on Information
Processing Systems.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
3. All advertising materials mentioning features or use of this software
must display the following acknowledgement:
This product includes software developed by the University of
California, Berkeley and its contributors.
4. Neither the name of the University nor the names of its contributors
may be used to endorse or promote products derived from this software
without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.
@(#)islower.3 8.1 (Berkeley) 6/4/93
$FreeBSD: head/lib/libc/locale/islower.3 73088 2001-02-26 13:23:47Z ru $
.Dd June 4, 1993 .Dt ISLOWER 3 .Os .Sh NAME .Nm islower .Nd lower-case character test .Sh LIBRARY .Lb libc .Sh SYNOPSIS .Fd #include <ctype.h> .Ft int .Fn islower "int c" .Sh DESCRIPTION The .Fn islower function tests for any lower-case letters. For single C .Va char Ns s locales (see .Xr multibyte 3 ) the value of the argument is representable as an .Li unsigned char or the value of .Dv EOF . In the ASCII character set, this includes the following characters (with their numeric values shown in octal):
p l -column 000_``0''__ 000_``0''__ 000_``0''__ 000_``0''__ 000_``0''__ t "141 ``a'' \t142 ``b'' \t143 ``c'' \t144 ``d'' \t145 ``e''" t "146 ``f'' \t147 ``g'' \t150 ``h'' \t151 ``i'' \t152 ``j''" t "153 ``k'' \t154 ``l'' \t155 ``m'' \t156 ``n'' \t157 ``o''" t "160 ``p'' \t161 ``q'' \t162 ``r'' \t163 ``s'' \t164 ``t''" t "165 ``u'' \t166 ``v'' \t167 ``w'' \t170 ``x'' \t171 ``y''" t "172 ``z''" .El .Sh RETURN VALUES The .Fn islower function returns zero if the character tests false and returns non-zero if the character tests true. .Sh SEE ALSO .Xr ctype 3 , .Xr multibyte 3 , .Xr tolower 3 , .Xr ascii 7 .Sh STANDARDS The .Fn islower function conforms to .St -isoC .