static void process(int p)
{
if(p == 81)
{
print_board();
return;
}
int y = div9(p);
int x = p % 9;
if(board.trace[p] & 512)
{
process(p + 1);
return;
}
for(unsigned int v = 1; v != 512; v <<= 1)
{
unsigned int* cx = board.cols + x;
unsigned int* cy = board.rows + y;
if(*cx & v | *cy & v)
continue;
unsigned int* cb = &board.blocks[div3(y)][div3(x)];
if(*cb & v)
continue;
board.trace[p] = v;
*cx |= v;
*cy |= v;
*cb |= v;
process(p + 1);
*cb ^= v;
*cy ^= v;
*cx ^= v;
}
}
static void split_into8(
word r, word g, word b,
int n, byte *inxs
)
{
byte inx;
if ( n >= 9 )
{
inx = takefrom8(div9(r), div9(g), div9(b));
b -= gbmrgb_8[inx].b;
g -= gbmrgb_8[inx].g;
r -= gbmrgb_8[inx].r;
*inxs++ = inx;
inx = takefrom8(div8(r), div8(g), div8(b));
b -= gbmrgb_8[inx].b;
g -= gbmrgb_8[inx].g;
r -= gbmrgb_8[inx].r;
*inxs++ = inx;
inx = takefrom8(div7(r), div7(g), div7(b));
b -= gbmrgb_8[inx].b;
g -= gbmrgb_8[inx].g;
r -= gbmrgb_8[inx].r;
*inxs++ = inx;
}
if ( n >= 6 )
{
inx = takefrom8(div6(r), div6(g), div6(b));
b -= gbmrgb_8[inx].b;
g -= gbmrgb_8[inx].g;
r -= gbmrgb_8[inx].r;
*inxs++ = inx;
inx = takefrom8(div5(r), div5(g), div5(b));
b -= gbmrgb_8[inx].b;
g -= gbmrgb_8[inx].g;
r -= gbmrgb_8[inx].r;
*inxs++ = inx;
}
if ( n >= 4 )
{
inx = takefrom8(div4(r), div4(g), div4(b));
b -= gbmrgb_8[inx].b;
g -= gbmrgb_8[inx].g;
r -= gbmrgb_8[inx].r;
*inxs++ = inx;
}
if ( n >= 3 )
{
inx = takefrom8(div3(r), div3(g), div3(b));
b -= gbmrgb_8[inx].b;
g -= gbmrgb_8[inx].g;
r -= gbmrgb_8[inx].r;
*inxs++ = inx;
}
inx = takefrom8(div2(r), div2(g), div2(b));
b -= gbmrgb_8[inx].b;
g -= gbmrgb_8[inx].g;
r -= gbmrgb_8[inx].r;
*inxs++ = inx;
*inxs = takefrom8(r, g, b);
}