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#[derive(Default)]
pub struct Table {
pub offset: usize,
pub len: usize,
pub width: usize,
pub columns: [Column; 6],
}
#[derive(Default)]
pub struct Column {
pub offset: usize,
pub width: usize,
}
impl Table {
pub fn index_width(&self) -> usize {
if self.len < (1 << 16) {
2
} else {
4
}
}
pub fn set_columns(&mut self, a: usize, b: usize, c: usize, d: usize, e: usize, f: usize) {
self.width = a + b + c + d + e + f;
self.columns[0] = Column::new(0, a);
if b != 0 {
self.columns[1] = Column::new(a, b);
}
if c != 0 {
self.columns[2] = Column::new(a + b, c);
}
if d != 0 {
self.columns[3] = Column::new(a + b + c, d);
}
if e != 0 {
self.columns[4] = Column::new(a + b + c + d, e);
}
if f != 0 {
self.columns[5] = Column::new(a + b + c + d + e, f);
}
}
pub fn set_data(&mut self, offset: &mut usize) {
if self.len != 0 {
let next = *offset + self.len * self.width;
self.offset = *offset;
*offset = next;
}
}
}
impl Column {
fn new(offset: usize, width: usize) -> Self {
Self { offset, width }
}
}
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