projects / unix-history / blame
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|---|---|---|
| 15637ed4 RG |
1 | .\" Copyright (c) 1991 The Regents of the University of California. |
| 2 | .\" 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 | |
| 9 | .\" modification, are permitted provided that the following conditions | |
| 10 | .\" are met: | |
| 11 | .\" 1. Redistributions of source code must retain the above copyright | |
| 12 | .\" notice, this list of conditions and the following disclaimer. | |
| 13 | .\" 2. Redistributions in binary form must reproduce the above copyright | |
| 14 | .\" notice, this list of conditions and the following disclaimer in the | |
| 15 | .\" documentation and/or other materials provided with the distribution. | |
| 16 | .\" 3. All advertising materials mentioning features or use of this software | |
| 17 | .\" must display the following acknowledgement: | |
| 18 | .\" This product includes software developed by the University of | |
| 19 | .\" California, Berkeley and its contributors. | |
| 20 | .\" 4. Neither the name of the University nor the names of its contributors | |
| 21 | .\" may be used to endorse or promote products derived from this software | |
| 22 | .\" without specific prior written permission. | |
| 23 | .\" | |
| 24 | .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
| 25 | .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 26 | .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 27 | .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
| 28 | .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| 29 | .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
| 30 | .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 31 | .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
| 32 | .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
| 33 | .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
| 34 | .\" SUCH DAMAGE. | |
| 35 | .\" | |
| 36 | .\" @(#)islower.3 5.2 (Berkeley) 6/29/91 | |
| 37 | .\" | |
| 38 | .Dd June 29, 1991 | |
| 39 | .Dt ISLOWER 3 | |
| 40 | .Os | |
| 41 | .Sh NAME | |
| 42 | .Nm islower | |
| 43 | .Nd lower-case character test | |
| 44 | .Sh SYNOPSIS | |
| 45 | .Fd #include <ctype.h> | |
| 46 | .Ft int | |
| 47 | .Fn islower "int c" | |
| 48 | .Sh DESCRIPTION | |
| 49 | The | |
| 50 | .Fn islower | |
| 51 | function tests for any lower-case letter | |
| 52 | .\" or any of an | |
| 53 | .\" implementation-defined set of characters | |
| 54 | for which none of | |
| 55 | .Xr iscntrl 3 , | |
| 56 | .Xr isdigit 3 , | |
| 57 | .Xr ispunct 3 , | |
| 58 | or | |
| 59 | .Xr isspace 3 | |
| 60 | is true. | |
| 61 | In the | |
| 62 | .Em ``C'' | |
| 63 | locale, | |
| 64 | .Fn islower | |
| 65 | returns true only for the characters defined as lower-case letters. | |
| 66 | .Sh RETURN VALUES | |
| 67 | The | |
| 68 | .Fn islower | |
| 69 | macro returns zero if the character tests false and | |
| 70 | returns non-zero if the character tests true. | |
| 71 | .Sh SEE ALSO | |
| 72 | .Xr isascii 3 , | |
| 73 | .Xr isalnum 3 , | |
| 74 | .Xr isalpha 3 , | |
| 75 | .Xr iscntrl 3 , | |
| 76 | .Xr isdigit 3 , | |
| 77 | .Xr isgraph 3 , | |
| 78 | .Xr isprint 3 , | |
| 79 | .Xr ispunct 3 , | |
| 80 | .Xr isspace 3 , | |
| 81 | .Xr isupper 3 , | |
| 82 | .Xr isxdigit 3 , | |
| 83 | .Xr toascii 3 , | |
| 84 | .Xr tolower 3 , | |
| 85 | .Xr toupper 3 , | |
| 86 | .Xr stdio 3 | |
| 87 | .Xr ascii 7 | |
| 88 | .Sh STANDARDS | |
| 89 | The | |
| 90 | .Fn islower | |
| 91 | function conforms to | |
| 92 | .St -ansiC . |