github.com/afumu/libc@v0.0.6/musl/src/ctype/wcswidth.c (about)

     1  #include <wchar.h>
     2  
     3  int wcswidth(const wchar_t *wcs, size_t n)
     4  {
     5  	int l=0, k=0;
     6  	for (; n-- && *wcs && (k = wcwidth(*wcs)) >= 0; l+=k, wcs++);
     7  	return (k < 0) ? k : l;
     8  }