1WCTRANS(3P) POSIX Programmer's Manual WCTRANS(3P)
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6 This manual page is part of the POSIX Programmer's Manual. The Linux
7 implementation of this interface may differ (consult the corresponding
8 Linux manual page for details of Linux behavior), or the interface may
9 not be implemented on Linux.
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12 wctrans - define character mapping
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15 #include <wctype.h>
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17 wctrans_t wctrans(const char *charclass);
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21 The wctrans() function is defined for valid character mapping names
22 identified in the current locale. The charclass is a string identifying
23 a generic character mapping name for which codeset-specific information
24 is required. The following character mapping names are defined in all
25 locales: tolower and toupper.
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27 The function shall return a value of type wctrans_t, which can be used
28 as the second argument to subsequent calls of towctrans(). The
29 wctrans() function shall determine values of wctrans_t according to the
30 rules of the coded character set defined by character mapping informa‐
31 tion in the program's locale (category LC_CTYPE ). The values returned
32 by wctrans() shall be valid until a call to setlocale() that modifies
33 the category LC_CTYPE.
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36 The wctrans() function shall return 0 and may set errno to indicate
37 the error if the given character mapping name is not valid for the cur‐
38 rent locale (category LC_CTYPE ); otherwise, it shall return a non-zero
39 object of type wctrans_t that can be used in calls to towctrans().
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42 The wctrans() function may fail if:
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44 EINVAL The character mapping name pointed to by charclass is not valid
45 in the current locale.
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48 The following sections are informative.
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51 None.
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54 None.
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60 None.
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63 towctrans(), the Base Definitions volume of IEEE Std 1003.1-2001,
64 <wctype.h>
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67 Portions of this text are reprinted and reproduced in electronic form
68 from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
69 -- Portable Operating System Interface (POSIX), The Open Group Base
70 Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
71 Electrical and Electronics Engineers, Inc and The Open Group. In the
72 event of any discrepancy between this version and the original IEEE and
73 The Open Group Standard, the original IEEE and The Open Group Standard
74 is the referee document. The original Standard can be obtained online
75 at http://www.opengroup.org/unix/online.html .
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79IEEE/The Open Group 2003 WCTRANS(3P)