1WCSWIDTH(3P) POSIX Programmer's Manual WCSWIDTH(3P)
2
3
4
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.
10
12 wcswidth - number of column positions of a wide-character string
13
15 #include <wchar.h>
16
17 int wcswidth(const wchar_t *pwcs, size_t n);
18
19
21 The wcswidth() function shall determine the number of column positions
22 required for n wide-character codes (or fewer than n wide-character
23 codes if a null wide-character code is encountered before n wide-char‐
24 acter codes are exhausted) in the string pointed to by pwcs.
25
27 The wcswidth() function either shall return 0 (if pwcs points to a null
28 wide-character code), or return the number of column positions to be
29 occupied by the wide-character string pointed to by pwcs, or return -1
30 (if any of the first n wide-character codes in the wide-character
31 string pointed to by pwcs is not a printable wide-character code).
32
34 No errors are defined.
35
36 The following sections are informative.
37
39 None.
40
42 This function was removed from the final ISO/IEC 9899:1990/Amendment
43 1:1995 (E), and the return value for a non-printable wide character is
44 not specified.
45
47 None.
48
50 None.
51
53 wcwidth(), the Base Definitions volume of IEEE Std 1003.1-2001, Section
54 3.103, Column Position, <wchar.h>
55
57 Portions of this text are reprinted and reproduced in electronic form
58 from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
59 -- Portable Operating System Interface (POSIX), The Open Group Base
60 Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
61 Electrical and Electronics Engineers, Inc and The Open Group. In the
62 event of any discrepancy between this version and the original IEEE and
63 The Open Group Standard, the original IEEE and The Open Group Standard
64 is the referee document. The original Standard can be obtained online
65 at http://www.opengroup.org/unix/online.html .
66
67
68
69IEEE/The Open Group 2003 WCSWIDTH(3P)