1.\" Copyright (c) 1991, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 4. Neither the name of the University nor the names of its contributors 13.\" may be used to endorse or promote products derived from this software 14.\" without specific prior written permission. 15.\" 16.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 17.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 20.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26.\" SUCH DAMAGE. 27.\" 28.\" @(#)ctype.3 8.1 (Berkeley) 6/4/93 29.\" $FreeBSD: head/lib/libc/locale/ctype.3 233648 2012-03-29 05:02:12Z eadler $ 30.\" 31.Dd March 30, 2004 32.Dt CTYPE 3 33.Os 34.Sh NAME 35.Nm digittoint , 36.Nm isalnum , 37.Nm isalpha , 38.Nm isascii , 39.Nm isblank , 40.Nm iscntrl , 41.Nm isdigit , 42.Nm isgraph , 43.Nm ishexnumber , 44.Nm isideogram , 45.Nm islower , 46.Nm isnumber , 47.Nm isphonogram , 48.Nm isprint , 49.Nm ispunct , 50.Nm isrune , 51.Nm isspace , 52.Nm isspecial , 53.Nm isupper , 54.Nm isxdigit , 55.Nm toascii , 56.Nm tolower , 57.Nm toupper 58.Nd character classification functions 59.Sh LIBRARY 60.Lb libc 61.Sh SYNOPSIS 62.In ctype.h 63.Ft int 64.Fn digittoint "int c" 65.Ft int 66.Fn isalnum "int c" 67.Ft int 68.Fn isalpha "int c" 69.Ft int 70.Fn isascii "int c" 71.Ft int 72.Fn iscntrl "int c" 73.Ft int 74.Fn isdigit "int c" 75.Ft int 76.Fn isgraph "int c" 77.Ft int 78.Fn ishexnumber "int c" 79.Ft int 80.Fn isideogram "int c" 81.Ft int 82.Fn islower "int c" 83.Ft int 84.Fn isnumber "int c" 85.Ft int 86.Fn isphonogram "int c" 87.Ft int 88.Fn isspecial "int c" 89.Ft int 90.Fn isprint "int c" 91.Ft int 92.Fn ispunct "int c" 93.Ft int 94.Fn isrune "int c" 95.Ft int 96.Fn isspace "int c" 97.Ft int 98.Fn isupper "int c" 99.Ft int 100.Fn isxdigit "int c" 101.Ft int 102.Fn toascii "int c" 103.Ft int 104.Fn tolower "int c" 105.Ft int 106.Fn toupper "int c" 107.Sh DESCRIPTION 108The above functions perform character tests and conversions on the integer 109.Fa c . 110They are available as macros, defined in the include file 111.In ctype.h , 112or as true functions in the C library. 113See the specific manual pages for more information. 114.Sh SEE ALSO 115.Xr digittoint 3 , 116.Xr isalnum 3 , 117.Xr isalpha 3 , 118.Xr isascii 3 , 119.Xr isblank 3 , 120.Xr iscntrl 3 , 121.Xr isdigit 3 , 122.Xr isgraph 3 , 123.Xr isideogram 3 , 124.Xr islower 3 , 125.Xr isphonogram 3 , 126.Xr isprint 3 , 127.Xr ispunct 3 , 128.Xr isrune 3 , 129.Xr isspace 3 , 130.Xr isspecial 3 , 131.Xr isupper 3 , 132.Xr isxdigit 3 , 133.Xr toascii 3 , 134.Xr tolower 3 , 135.Xr toupper 3 , 136.Xr wctype 3 , 137.Xr ascii 7 138.Sh STANDARDS 139These functions, except for 140.Fn digittoint , 141.Fn isascii , 142.Fn ishexnumber , 143.Fn isideogram , 144.Fn isnumber , 145.Fn isphonogram , 146.Fn isrune , 147.Fn isspecial 148and 149.Fn toascii , 150conform to 151.St -isoC . 152