unicode/unicode_wcwidth.c

   1 #include "unicode_config.h"
   2 #include "unicode.h"
   3
   4 #include "eastasianwidth.h"
   5
   6 #include <stdlib.h>
   7
   8 int unicode_wcwidth(unicode_char c)
   9 {
  10         size_t b=0;
  11         size_t e=sizeof(unicode_wcwidth_tab)/sizeof(unicode_wcwidth_tab[0]);
  12
  13         while (b < e)
  14         {
  15                 size_t n=b + (e-b)/2;
  16
  17                 if (c >= unicode_wcwidth_tab[n][0])
  18                 {
  19                         if (c <= unicode_wcwidth_tab[n][1])
  20                                 return 2;
  21                         b=n+1;
  22                 }
  23                 else
  24                 {
  25                         e=n;
  26                 }
  27         }
  28         return 1;
  29 }