Croissant Runtime
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use crate::asm::data::literal::Addr;
#[derive(Debug, Clone, Copy)]
pub struct MemorySpan {
addr: usize,
len: usize,
}
impl MemorySpan {
pub fn new(addr: Addr, len: usize) -> MemorySpan {
if len == 0 {
panic!("Cannot create empty span!");
}
Self {
addr: addr.0 as usize,
len,
}
}
/// Get start address
pub fn start(&self) -> Addr {
Addr(self.addr as u64)
}
/// Get end address (last included byte)
pub fn last(&self) -> Addr {
Addr((self.addr + self.len - 1) as u64)
}
/// Check if this intersects another span
pub fn intersects(&self, other: MemorySpan) -> bool {
!(
self.last() < other.start()
|| self.start() > other.last()
)
}
/// Check if this is a strict subset of another span
pub fn inside(&self, other: MemorySpan) -> bool {
self.start() >= other.start()
&& self.last() <= other.last()
}
}