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#define UNICODE
#define Unknown win_Unknown
#include <windows.h>
#include <winbase.h>
#undef Unknown
#undef Sleep
#include "dat.h"
#include "fns.h"
#include "error.h"
#include "r16.h"
#define Bit(i) (7-(i))
/* N 0's preceded by i 1's, T(Bit(2)) is 1100 0000 */
#define T(i) (((1 << (Bit(i)+1))-1) ^ 0xFF)
/* 0000 0000 0000 0111 1111 1111 */
#define RuneX(i) ((1 << (Bit(i) + ((i)-1)*Bitx))-1)
enum
{
Bitx = Bit(1),
Tx = T(1), /* 1000 0000 */
Rune1 = (1<<(Bit(0)+0*Bitx))-1, /* 0000 0000 0000 0000 0111 1111 */
Maskx = (1<<Bitx)-1, /* 0011 1111 */
Testx = Maskx ^ 0xFF, /* 1100 0000 */
SurrogateMin = 0xD800,
SurrogateMax = 0xDFFF,
Bad = Runeerror,
};
Rune16*
runes16dup(Rune16 *r)
{
int n;
Rune16 *s;
n = runes16len(r) + 1;
s = malloc(n * sizeof(Rune16));
if(s == nil)
error(Enomem);
memmove(s, r, n * sizeof(Rune16));
return s;
}
int
runes16len(Rune16 *r)
{
int n;
n = 0;
while(*r++ != 0)
n++;
return n;
}
char*
runes16toutf(char *p, Rune16 *r, int nc)
{
char *op, *ep;
int n, c;
Rune rc;
op = p;
ep = p + nc;
while(c = *r++) {
n = 1;
if(c >= Runeself)
n = runelen(c);
if(p + n >= ep)
break;
rc = c;
if(c < Runeself)
*p++ = c;
else
p += runetochar(p, &rc);
}
*p = '\0';
return op;
}
int
rune16nlen(Rune16 *r, int nrune)
{
int nb, i;
Rune c;
nb = 0;
while(nrune--) {
c = *r++;
if(c <= Rune1){
nb++;
} else {
for(i = 2; i < UTFmax + 1; i++)
if(c <= RuneX(i) || i == UTFmax){
nb += i;
break;
}
}
}
return nb;
}
Rune16*
utftorunes16(Rune16 *r, char *p, int nc)
{
Rune16 *or, *er;
Rune rc;
or = r;
er = r + nc;
while(*p != '\0' && r + 1 < er){
p += chartorune(&rc, p);
*r++ = rc; /* we'll ignore surrogate pairs */
}
*r = '\0';
return or;
}
int
runes16cmp(Rune16 *s1, Rune16 *s2)
{
Rune16 r1, r2;
for(;;) {
r1 = *s1++;
r2 = *s2++;
if(r1 != r2) {
if(r1 > r2)
return 1;
return -1;
}
if(r1 == 0)
return 0;
}
}
wchar_t *
widen(char *s)
{
int n;
wchar_t *ws;
n = utflen(s) + 1;
ws = smalloc(n*sizeof(wchar_t));
utftorunes16(ws, s, n);
return ws;
}
char *
narrowen(wchar_t *ws)
{
char *s;
int n;
n = widebytes(ws);
s = smalloc(n);
runes16toutf(s, ws, n);
return s;
}
int
widebytes(wchar_t *ws)
{
int n = 0;
while (*ws)
n += runelen(*ws++);
return n+1;
}
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