projects / thirdparty / man-pages.git / blame
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1 | .\" Copyright (c) Bruno Haible <haible@clisp.cons.org> |
| 2 | .\" | |
| e4a74ca8 | 3 | .\" SPDX-License-Identifier: GPL-2.0-or-later |
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4 | .\" |
| 5 | .\" References consulted: | |
| 6 | .\" GNU glibc-2 source code and manual | |
| 7 | .\" Dinkumware C library reference http://www.dinkumware.com/ | |
| 008f1ecc | 8 | .\" OpenGroup's Single UNIX specification http://www.UNIX-systems.org/online.html |
| fea681da MK |
9 | .\" ISO/IEC 9899:1999 |
| 10 | .\" | |
| 4c1c5274 | 11 | .TH iswalnum 3 (date) "Linux man-pages (unreleased)" |
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12 | .SH NAME |
| 13 | iswalnum \- test for alphanumeric wide character | |
| 4508f8a0 AC |
14 | .SH LIBRARY |
| 15 | Standard C library | |
| 8fc3b2cf | 16 | .RI ( libc ", " \-lc ) |
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17 | .SH SYNOPSIS |
| 18 | .nf | |
| 19 | .B #include <wctype.h> | |
| 68e4db0a | 20 | .PP |
| fea681da MK |
21 | .BI "int iswalnum(wint_t " wc ); |
| 22 | .fi | |
| 23 | .SH DESCRIPTION | |
| 60a90ecd MK |
24 | The |
| 25 | .BR iswalnum () | |
| 26 | function is the wide-character equivalent of the | |
| 3a72373c | 27 | .BR isalnum (3) |
| 60a90ecd | 28 | function. |
| 35cfd378 MK |
29 | It tests whether |
| 30 | .I wc | |
| 31 | is a wide character | |
| d0f17b57 | 32 | belonging to the wide-character class "alnum". |
| fea681da | 33 | .PP |
| d0f17b57 MK |
34 | The wide-character class "alnum" is a subclass of the wide-character class |
| 35 | "graph", and therefore also a subclass of the wide-character class "print". | |
| fea681da | 36 | .PP |
| d0f17b57 MK |
37 | Being a subclass of the wide-character class "print", |
| 38 | the wide-character class | |
| 39 | "alnum" is disjoint from the wide-character class "cntrl". | |
| fea681da | 40 | .PP |
| d0f17b57 MK |
41 | Being a subclass of the wide-character class "graph", |
| 42 | the wide-character class "alnum" is disjoint from | |
| 43 | the wide-character class "space" and its subclass "blank". | |
| fea681da | 44 | .PP |
| d0f17b57 | 45 | The wide-character class "alnum" is disjoint from the wide-character class |
| fea681da MK |
46 | "punct". |
| 47 | .PP | |
| d0f17b57 | 48 | The wide-character class "alnum" is the union of the wide-character classes |
| c13182ef | 49 | "alpha" and "digit". |
| d0f17b57 | 50 | As such, it also contains the wide-character class |
| fea681da MK |
51 | "xdigit". |
| 52 | .PP | |
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53 | The wide-character class "alnum" always contains at least the letters \(aqA\(aq |
| 54 | to \(aqZ\(aq, \(aqa\(aq to \(aqz\(aq and the digits \(aq0\(aq to \(aq9\(aq. | |
| 47297adb | 55 | .SH RETURN VALUE |
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56 | The |
| 57 | .BR iswalnum () | |
| c7094399 | 58 | function returns nonzero |
| 35cfd378 MK |
59 | if |
| 60 | .I wc | |
| 61 | is a wide character | |
| d0f17b57 | 62 | belonging to the wide-character class "alnum". |
| 2b9b829d | 63 | Otherwise, it returns zero. |
| 0c3ad9ea | 64 | .SH ATTRIBUTES |
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65 | For an explanation of the terms used in this section, see |
| 66 | .BR attributes (7). | |
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67 | .ad l |
| 68 | .nh | |
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69 | .TS |
| 70 | allbox; | |
| c466875e | 71 | lbx lb lb |
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72 | l l l. |
| 73 | Interface Attribute Value | |
| 74 | T{ | |
| 0c3ad9ea | 75 | .BR iswalnum () |
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76 | T} Thread safety MT-Safe locale |
| 77 | .TE | |
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78 | .hy |
| 79 | .ad | |
| 80 | .sp 1 | |
| 3113c7f3 | 81 | .SH STANDARDS |
| c9333f90 | 82 | POSIX.1-2001, POSIX.1-2008, C99. |
| fea681da | 83 | .SH NOTES |
| d9bfdb9c | 84 | The behavior of |
| 60a90ecd | 85 | .BR iswalnum () |
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86 | depends on the |
| 87 | .B LC_CTYPE | |
| 88 | category of the | |
| fea681da | 89 | current locale. |
| 47297adb | 90 | .SH SEE ALSO |
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91 | .BR isalnum (3), |
| 92 | .BR iswctype (3) |