diff options
Diffstat (limited to 'lib/libc/locale/wcwidth.3')
| -rw-r--r-- | lib/libc/locale/wcwidth.3 | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/lib/libc/locale/wcwidth.3 b/lib/libc/locale/wcwidth.3 index b651368..78c969e 100644 --- a/lib/libc/locale/wcwidth.3 +++ b/lib/libc/locale/wcwidth.3 @@ -23,7 +23,7 @@ .\" SUCH DAMAGE. .\" .\" $FreeBSD$ -.Dd August 18, 2002 +.Dd October 3, 2002 .Dt WCWIDTH 3 .Os .Sh NAME @@ -52,6 +52,29 @@ argument is a null wide character (L'\e0'), is not printable, otherwise it returns the number of column positions the character occupies. +.Sh EXAMPLES +This code fragment reads text from standard input and +breaks lines that are more than 20 column positions wide, +similar to the +.Xr fold 1 +utility: +.Bd -literal -offset indent +wint_t ch; +int column, w; + +column = 0; +while ((ch = getwchar()) != WEOF) { + if ((w = wcwidth(ch)) > 0) + column += w; + if (column >= 20) { + putwchar(L'\n'); + column = 0; + } + putwchar(ch); + if (ch == L'\n') + column = 0; +} +.Ed .Sh SEE ALSO .Xr iswprint 3 , .Xr wcswidth 3 |
