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 | .\" | |
| 45186a5d | 11 | .TH ISWDIGIT 3 2021-03-22 "Linux man-pages (unreleased)" |
| fea681da MK |
12 | .SH NAME |
| 13 | iswdigit \- test for decimal digit wide character | |
| b98625b1 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 |
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21 | .BI "int iswdigit(wint_t " wc ); |
| 22 | .fi | |
| 23 | .SH DESCRIPTION | |
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24 | The |
| 25 | .BR iswdigit () | |
| 26 | function is the wide-character equivalent of the | |
| 27 | .BR isdigit (3) | |
| 28 | function. | |
| 35cfd378 MK |
29 | It tests whether |
| 30 | .I wc | |
| 31 | is a wide character | |
| d0f17b57 | 32 | belonging to the wide-character class "digit". |
| fea681da | 33 | .PP |
| d0f17b57 | 34 | The wide-character class "digit" is a subclass of the wide-character class |
| 988db661 | 35 | "xdigit", and therefore also a subclass |
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36 | of the wide-character class "alnum", of |
| 37 | the wide-character class "graph" and of the wide-character class "print". | |
| fea681da | 38 | .PP |
| 988db661 | 39 | Being a subclass of the wide character |
| d0f17b57 MK |
40 | class "print", the wide-character class |
| 41 | "digit" is disjoint from the wide-character class "cntrl". | |
| fea681da | 42 | .PP |
| 988db661 | 43 | Being a subclass of the wide-character class "graph", |
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44 | the wide-character class |
| 45 | "digit" is disjoint from the wide-character class "space" and its subclass | |
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46 | "blank". |
| 47 | .PP | |
| 988db661 | 48 | Being a subclass of the wide-character |
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49 | class "alnum", the wide-character class |
| 50 | "digit" is disjoint from the wide-character class "punct". | |
| fea681da | 51 | .PP |
| 988db661 | 52 | The wide-character class "digit" is |
| d0f17b57 | 53 | disjoint from the wide-character class |
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54 | "alpha" and therefore also disjoint from its subclasses "lower", "upper". |
| 55 | .PP | |
| 988db661 | 56 | The wide-character class "digit" always |
| f81fb444 | 57 | contains exactly the digits \(aq0\(aq to \(aq9\(aq. |
| 47297adb | 58 | .SH RETURN VALUE |
| 60a90ecd MK |
59 | The |
| 60 | .BR iswdigit () | |
| c7094399 | 61 | function returns nonzero |
| 35cfd378 MK |
62 | if |
| 63 | .I wc | |
| 64 | is a wide character | |
| d0f17b57 | 65 | belonging to the wide-character class "digit". |
| 2b9b829d | 66 | Otherwise, it returns zero. |
| 2d1a90ae PH |
67 | .SH ATTRIBUTES |
| 68 | For an explanation of the terms used in this section, see | |
| 69 | .BR attributes (7). | |
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70 | .ad l |
| 71 | .nh | |
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72 | .TS |
| 73 | allbox; | |
| c466875e | 74 | lbx lb lb |
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75 | l l l. |
| 76 | Interface Attribute Value | |
| 77 | T{ | |
| 78 | .BR iswdigit () | |
| 79 | T} Thread safety MT-Safe locale | |
| 80 | .TE | |
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81 | .hy |
| 82 | .ad | |
| 83 | .sp 1 | |
| 3113c7f3 | 84 | .SH STANDARDS |
| ca6a023d | 85 | POSIX.1-2001, POSIX.1-2008, C99. |
| fea681da | 86 | .SH NOTES |
| d9bfdb9c | 87 | The behavior of |
| 60a90ecd | 88 | .BR iswdigit () |
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89 | depends on the |
| 90 | .B LC_CTYPE | |
| 91 | category of the | |
| fea681da | 92 | current locale. |
| 47297adb | 93 | .SH SEE ALSO |
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94 | .BR isdigit (3), |
| 95 | .BR iswctype (3) |