revm_bytecode/legacy/
jump_map.rs

1use bitvec::vec::BitVec;
2use primitives::hex;
3use std::{fmt::Debug, sync::Arc};
4
5/// A map of valid `jump` destinations
6#[derive(Clone, Default, PartialEq, Eq, Hash, Ord, PartialOrd)]
7#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
8pub struct JumpTable(pub Arc<BitVec<u8>>);
9
10impl Debug for JumpTable {
11    fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
12        f.debug_struct("JumpTable")
13            .field("map", &hex::encode(self.0.as_raw_slice()))
14            .finish()
15    }
16}
17
18impl JumpTable {
19    /// Gets the raw bytes of the jump map.
20    #[inline]
21    pub fn as_slice(&self) -> &[u8] {
22        self.0.as_raw_slice()
23    }
24
25    /// Constructs a jump map from raw bytes.
26    #[inline]
27    pub fn from_slice(slice: &[u8]) -> Self {
28        Self(Arc::new(BitVec::from_slice(slice)))
29    }
30
31    /// Checks if `pc` is a valid jump destination.
32    #[inline]
33    pub fn is_valid(&self, pc: usize) -> bool {
34        pc < self.0.len() && unsafe { *self.0.get_unchecked(pc) }
35    }
36}
revm_bytecode/legacy/jump_map.rs

revm_bytecode/legacy/
jump_map.rs
