Copyright 2014 Garrett D'Amore <garrett@damore.org>
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#include <wchar.h> int wcswidth(const wchar_t *pwcs, size_t n);
#include <wchar.h> #include <xlocale.h> int wcswidth_l(const wchar_t *pwcs, size_t n, locale_t loc);
The wcswidth() function determines the number of column positions required for n wide-character codes (or fewer than n wide-character codes if a null wide-character code is encountered before n wide-character codes are exhausted) in the string pointed to by pwcs.
The wcswidth() function either returns 0 (if pwcs points to a null wide-character code), or returns the number of column positions to be occupied by the wide-character string pointed to by pwcs, or returns -1 (if any of the first n wide-character codes in the wide-character string pointed to by pwcs is not a printing wide-character code).
The function wcwidth_l() behaves identically to wcwidth(), except instead of operating in the current environemtn, it operates in the environment specified by loc.
No errors are defined.
See attributes(5) for descriptions of the following attributes:
| ATTRIBUTE TYPE ATTRIBUTE VALUE |
| CSI Enabled |
| Interface Stability Standard |
| MT-Level MT-Safe with exceptions |
newlocale(3C), setlocale(3C), uselocale(3C), wcwidth(3C), attributes(5), standards(5)