#include <u.h>
#include <libutf.h>

static
rune*
rangesearch(rune c, rune *t, int n, int ne)
{
   rune *p;
   int m;
   while(n > 1) {
   m = n >> 1;
   p = t + m*ne;
   if(c >= p[0]){
       t = p;
       n = n-m;
   }else
       n = m;
   }
   if(n && c >= t[0])
       return t;
   return 0;
}

static rune isspace_range[] = {
	0x0009, 0x000d,
	0x0085, 0x0085,
};

int
utf8·isspace(rune c)
{
    rune *p;

   p = rangesearch(c, isspace_range, arrlen(isspace_range)/2, 2);
   if(p && c >= p[0] && c <= p[1])
       return 1;
   return 0;
}

int
utf8·isdigit(rune c)
{
    rune *p;

   return 0;
}

int
utf8·isalpha(rune c)
{
    rune *p;

   return 0;
}

int
utf8·isupper(rune c)
{
    rune *p;

   return 0;
}

int
utf8·islower(rune c)
{
    rune *p;

   return 0;
}

int
utf8·istitle(rune c)
{
    rune *p;

   return 0;
}

int
utf8·ispunct(rune c)
{
    rune *p;

   return 0;
}

rune
utf8·toupper(rune c)
{
	rune *p;

   return c;
}

rune
utf8·tolower(rune c)
{
	rune *p;

   return c;
}

rune
utf8·totitle(rune c)
{
	rune *p;

   return c;
}