src/ctype/iswprint.c

   1 #include <wctype.h>
   2
   3 /* Consider all legal codepoints as printable except for:
   4  * - C0 and C1 control characters
   5  * - U+2028 and U+2029 (line/para break)
   6  * - U+FFF9 through U+FFFB (interlinear annotation controls)
   7  * The following code is optimized heavily to make hot paths for the
   8  * expected printable characters. */
   9
  10 int iswprint(wint_t wc)
  11 {
  12         if (wc < 0xffU)
  13                 return (wc+1 & 0x7f) >= 0x21;
  14         if (wc < 0x2028U || wc-0x202aU < 0xd800-0x202a || wc-0xe000U < 0xfff9-0xe000)
  15                 return 1;
  16         if (wc-0xfffcU > 0x10ffff-0xfffc || (wc&0xfffe)==0xfffe)
  17                 return 0;
  18         return 1;
  19 }
  20
  21 int __iswprint_l(wint_t c, locale_t l)
  22 {
  23         return iswprint(c);
  24 }
  25
  26 weak_alias(__iswprint_l, iswprint_l);