runtime-sdk/evm/precompile: Split standard precompiles into submodules

oasisprotocol · Jul 26, 2023 · 5b3b604 · 5b3b604
1 parent e904dcb
commit 5b3b604
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Showing 7 changed files with 766 additions and 710 deletions.
diff --git a/Cargo.lock b/Cargo.lock
diff --git a/runtime-sdk/modules/evm/src/precompile/mod.rs b/runtime-sdk/modules/evm/src/precompile/mod.rs
@@ -1,6 +1,6 @@
 //! EVM precompiles.
 
-use std::marker::PhantomData;
+use std::{cmp::min, marker::PhantomData};
 
 use evm::{
     executor::stack::{PrecompileFailure, PrecompileHandle, PrecompileOutput, PrecompileSet},
@@ -60,6 +60,16 @@ fn record_multilinear_cost(
     Ok(())
 }
 
+/// Copies bytes from source to target.
+fn read_input(source: &[u8], target: &mut [u8], offset: usize) {
+    if source.len() <= offset {
+        return;
+    }
+
+    let len = min(target.len(), source.len() - offset);
+    target[..len].copy_from_slice(&source[offset..offset + len]);
+}
+
 pub(crate) struct Precompiles<'a, Cfg: Config, B: EVMBackendExt> {
     backend: &'a B,
     config: PhantomData<Cfg>,