1.\" Copyright (c) 1991, 1993
2.\" The Regents of the University of California. All rights reserved.
3.\"
4.\" This code is derived from software contributed to Berkeley by
5.\" the American National Standards Committee X3, on Information
6.\" Processing Systems.
7.\"
8.\" Redistribution and use in source and binary forms, with or without
--- 16 unchanged lines hidden (view full) ---
25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30.\" SUCH DAMAGE.
31.\"
32.\" @(#)islower.3 8.1 (Berkeley) 6/4/93
33.\" $FreeBSD: head/lib/libc/locale/islower.3 233992 2012-04-07 09:05:30Z joel $
34.\"
35.Dd July 17, 2005
36.Dt ISLOWER 3
37.Os
38.Sh NAME
39.Nm islower
40.Nd lower-case character test
41.Sh LIBRARY
42.Lb libc
43.Sh SYNOPSIS
44.In ctype.h
45.Ft int
46.Fn islower "int c"
47.Sh DESCRIPTION
48The
49.Fn islower
50function tests for any lower-case letters.
51The value of the argument must be representable as an
52.Vt "unsigned char"
53or the value of
54.Dv EOF .
55.Pp
56In the ASCII character set, this includes the following characters
57(with their numeric values shown in octal):
58.Bl -column \&000_``0''__ \&000_``0''__ \&000_``0''__ \&000_``0''__ \&000_``0''__
59.It "\&141\ ``a''" Ta "142\ ``b''" Ta "143\ ``c''" Ta "144\ ``d''" Ta "145\ ``e''"
60.It "\&146\ ``f''" Ta "147\ ``g''" Ta "150\ ``h''" Ta "151\ ``i''" Ta "152\ ``j''"
61.It "\&153\ ``k''" Ta "154\ ``l''" Ta "155\ ``m''" Ta "156\ ``n''" Ta "157\ ``o''"
62.It "\&160\ ``p''" Ta "161\ ``q''" Ta "162\ ``r''" Ta "163\ ``s''" Ta "164\ ``t''"
63.It "\&165\ ``u''" Ta "166\ ``v''" Ta "167\ ``w''" Ta "170\ ``x''" Ta "171\ ``y''"
64.It "\&172\ ``z''" Ta \& Ta \& Ta \& Ta \&
65.El
66.Sh RETURN VALUES
67The
68.Fn islower
69function returns zero if the character tests false and
70returns non-zero if the character tests true.
71.Sh COMPATIBILITY
72The
73.Bx 4.4
74extension of accepting arguments outside of the range of the
75.Vt "unsigned char"
76type in locales with large character sets is considered obsolete
77and may not be supported in future releases.
78The
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83.Xr iswlower 3 ,
84.Xr tolower 3 ,
85.Xr ascii 7
86.Sh STANDARDS
87The
88.Fn islower
89function conforms to
90.St -isoC .
2.\" The Regents of the University of California. All rights reserved.
3.\"
4.\" This code is derived from software contributed to Berkeley by
5.\" the American National Standards Committee X3, on Information
6.\" Processing Systems.
7.\"
8.\" Redistribution and use in source and binary forms, with or without
--- 16 unchanged lines hidden (view full) ---
25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30.\" SUCH DAMAGE.
31.\"
32.\" @(#)islower.3 8.1 (Berkeley) 6/4/93
33.\" $FreeBSD: head/lib/libc/locale/islower.3 233992 2012-04-07 09:05:30Z joel $
34.\"
35.Dd July 17, 2005
36.Dt ISLOWER 3
37.Os
38.Sh NAME
39.Nm islower
40.Nd lower-case character test
41.Sh LIBRARY
42.Lb libc
43.Sh SYNOPSIS
44.In ctype.h
45.Ft int
46.Fn islower "int c"
47.Sh DESCRIPTION
48The
49.Fn islower
50function tests for any lower-case letters.
51The value of the argument must be representable as an
52.Vt "unsigned char"
53or the value of
54.Dv EOF .
55.Pp
56In the ASCII character set, this includes the following characters
57(with their numeric values shown in octal):
58.Bl -column \&000_``0''__ \&000_``0''__ \&000_``0''__ \&000_``0''__ \&000_``0''__
59.It "\&141\ ``a''" Ta "142\ ``b''" Ta "143\ ``c''" Ta "144\ ``d''" Ta "145\ ``e''"
60.It "\&146\ ``f''" Ta "147\ ``g''" Ta "150\ ``h''" Ta "151\ ``i''" Ta "152\ ``j''"
61.It "\&153\ ``k''" Ta "154\ ``l''" Ta "155\ ``m''" Ta "156\ ``n''" Ta "157\ ``o''"
62.It "\&160\ ``p''" Ta "161\ ``q''" Ta "162\ ``r''" Ta "163\ ``s''" Ta "164\ ``t''"
63.It "\&165\ ``u''" Ta "166\ ``v''" Ta "167\ ``w''" Ta "170\ ``x''" Ta "171\ ``y''"
64.It "\&172\ ``z''" Ta \& Ta \& Ta \& Ta \&
65.El
66.Sh RETURN VALUES
67The
68.Fn islower
69function returns zero if the character tests false and
70returns non-zero if the character tests true.
71.Sh COMPATIBILITY
72The
73.Bx 4.4
74extension of accepting arguments outside of the range of the
75.Vt "unsigned char"
76type in locales with large character sets is considered obsolete
77and may not be supported in future releases.
78The
--- 4 unchanged lines hidden (view full) ---
83.Xr iswlower 3 ,
84.Xr tolower 3 ,
85.Xr ascii 7
86.Sh STANDARDS
87The
88.Fn islower
89function conforms to
90.St -isoC .