1<wctype.h>(P) POSIX Programmer's Manual <wctype.h>(P)
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6 wctype.h - wide-character classification and mapping utilities
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9 #include <wctype.h>
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12 Some of the functionality described on this reference page extends the
13 ISO C standard. Applications shall define the appropriate feature test
14 macro (see the System Interfaces volume of IEEE Std 1003.1-2001, Sec‐
15 tion 2.2, The Compilation Environment) to enable the visibility of
16 these symbols in this header.
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18 The <wctype.h> header shall define the following types:
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20 wint_t As described in <wchar.h> .
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22 wctrans_t
23 A scalar type that can hold values which represent locale-spe‐
24 cific character mappings.
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26 wctype_t
27 As described in <wchar.h> .
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30 The following shall be declared as functions and may also be defined as
31 macros. Function prototypes shall be provided.
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33
34 int iswalnum(wint_t);
35 int iswalpha(wint_t);
36 int iswblank(wint_t);
37 int iswcntrl(wint_t);
38 int iswdigit(wint_t);
39 int iswgraph(wint_t);
40 int iswlower(wint_t);
41 int iswprint(wint_t);
42 int iswpunct(wint_t);
43 int iswspace(wint_t);
44 int iswupper(wint_t);
45 int iswxdigit(wint_t);
46 int iswctype(wint_t, wctype_t);
47 wint_t towctrans(wint_t, wctrans_t);
48 wint_t towlower(wint_t);
49 wint_t towupper(wint_t);
50 wctrans_t wctrans(const char *);
51 wctype_t wctype(const char *);
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53 The <wctype.h> header shall define the following macro name:
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55 WEOF Constant expression of type wint_t that is returned by several
56 MSE functions to indicate end-of-file.
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59 For all functions described in this header that accept an argument of
60 type wint_t, the value is representable as a wchar_t or equals the
61 value of WEOF. If this argument has any other value, the behavior is
62 undefined.
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64 The behavior of these functions shall be affected by the LC_CTYPE cate‐
65 gory of the current locale.
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67 Inclusion of the <wctype.h> header may make visible all symbols from
68 the headers <ctype.h>, <stdarg.h>, <stddef.h>, <stdio.h>, <stdlib.h>,
69 <string.h>, <time.h>, and <wchar.h>.
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71 The following sections are informative.
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74 None.
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77 None.
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80 None.
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83 <ctype.h> , <locale.h> , <stdarg.h> , <stddef.h> , <stdio.h> ,
84 <stdlib.h> , <string.h> , <time.h> , <wchar.h> , the System Interfaces
85 volume of IEEE Std 1003.1-2001, iswalnum(), iswalpha(), iswblank(),
86 iswcntrl(), iswctype(), iswdigit(), iswgraph(), iswlower(), iswprint(),
87 iswpunct(), iswspace(), iswupper(), iswxdigit(), setlocale(), towc‐
88 trans(), towlower(), towupper(), wctrans(), wctype()
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91 Portions of this text are reprinted and reproduced in electronic form
92 from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
93 -- Portable Operating System Interface (POSIX), The Open Group Base
94 Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
95 Electrical and Electronics Engineers, Inc and The Open Group. In the
96 event of any discrepancy between this version and the original IEEE and
97 The Open Group Standard, the original IEEE and The Open Group Standard
98 is the referee document. The original Standard can be obtained online
99 at http://www.opengroup.org/unix/online.html .
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103IEEE/The Open Group 2003 <wctype.h>(P)