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// Copyright 2021-2026 Vector 35 Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
use std::fmt::Debug;
use std::ops::Range;
use crate::basic_block::{BasicBlock, BlockContext};
use super::*;
#[derive(Copy, Clone)]
pub struct LowLevelILBlock<'func, M, F>
where
M: FunctionMutability,
F: FunctionForm,
{
pub(crate) function: &'func LowLevelILFunction<M, F>,
}
impl<'func, M, F> BlockContext for LowLevelILBlock<'func, M, F>
where
M: FunctionMutability,
F: FunctionForm,
{
type Instruction = LowLevelILInstruction<'func, M, F>;
type InstructionIndex = LowLevelInstructionIndex;
type Iter = LowLevelILBlockIter<'func, M, F>;
fn start(&self, block: &BasicBlock<Self>) -> LowLevelILInstruction<'func, M, F> {
self.function
.instruction_from_index(block.start_index())
.unwrap()
}
fn iter(&self, block: &BasicBlock<Self>) -> LowLevelILBlockIter<'func, M, F> {
LowLevelILBlockIter {
function: self.function,
range: (block.start_index().0)..(block.end_index().0),
}
}
}
impl<M, F> Debug for LowLevelILBlock<'_, M, F>
where
M: FunctionMutability,
F: FunctionForm,
{
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
f.debug_struct("LowLevelILBlock")
.field("function", &self.function)
.finish()
}
}
pub struct LowLevelILBlockIter<'func, M, F>
where
M: FunctionMutability,
F: FunctionForm,
{
function: &'func LowLevelILFunction<M, F>,
// TODO: Once step_trait is stable we can do Range<InstructionIndex>
range: Range<usize>,
}
impl<'func, M, F> Iterator for LowLevelILBlockIter<'func, M, F>
where
M: FunctionMutability,
F: FunctionForm,
{
type Item = LowLevelILInstruction<'func, M, F>;
fn next(&mut self) -> Option<Self::Item> {
self.range
.next()
.map(LowLevelInstructionIndex)
.and_then(|idx| self.function.instruction_from_index(idx))
}
}
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