summaryrefslogblamecommitdiff
path: root/src/ctype/wcwidth.c
blob: ab05cfec053d6bb6146efef15e3f7c660441a948 (plain) (tree)
1
2
3
4
5
6
7
8
9
                   
 

                                

  


                                 
 
                      
 















                                                                       
 
#include <wctype.h>

static unsigned char table[] = {
#include "nonspacing.h"
};

static unsigned char wtable[] = {
#include "wide.h"
};

int wcwidth(wint_t wc)
{
	if (wc < 0xffU)
		return (wc+1 & 0x7f) >= 0x21 ? 1 : wc ? -1 : 0;
	if ((wc & 0xfffeffffU) < 0xfffe) {
		if ((table[table[wc>>8]*32+((wc&255)>>3)]>>(wc&7))&1)
			return 0;
		if ((wtable[wtable[wc>>8]*32+((wc&255)>>3)]>>(wc&7))&1)
			return 2;
		return 1;
	}
	if ((wc & 0xfffe) == 0xfffe)
		return -1;
	if (wc-0x20000U < 0x20000)
		return 2;
	if (wc == 0xe0001 || wc-0xe0020U < 0x5f || wc-0xe0100 < 0xef)
		return 0;
	return 1;
}