Strwidth

名称

   strwidth() - 返回字符串的显示宽度

语法

   int strwidth( string str );

描述

   FluffOS 2.1 新增efun，strwidth() 返回字符串 'str' 的显示宽度。

   The driver uses rules defined in https://www.unicode.org/reports/tr11/tr11-36.html to calcuate character width.
   Control characters has no width, Wide characters, including emojis are two column wide. This rule is also used by sprintf() to layout strings.

参考

   strlen(3)