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https://github.com/fluencelabs/aquavm
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6df2b9d084
Many internal structures refer to trace positions; this is an important type of values. In the code, it is sometimes `u32`, sometimes `usize`. While such variables usually have "_pos" suffix, having a dedicated type does improve code with type guarantees.
80 lines
2.4 KiB
Rust
80 lines
2.4 KiB
Rust
/*
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* Copyright 2021 Fluence Labs Limited
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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use super::ExecutionTrace;
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use super::KeeperError;
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use super::KeeperResult;
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use super::TraceSlider;
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use crate::TracePos;
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use air_interpreter_data::GlobalStreamGens;
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use air_interpreter_data::InterpreterData;
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use std::collections::HashMap;
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/// Contains all necessary information about data.
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#[derive(Debug, Default, PartialEq)]
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pub struct MergeCtx {
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pub slider: TraceSlider,
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pub streams: GlobalStreamGens,
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}
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impl MergeCtx {
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#[allow(dead_code)]
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pub(crate) fn from_trace(trace: ExecutionTrace) -> Self {
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let slider = TraceSlider::new(trace);
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Self {
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slider,
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streams: HashMap::new(),
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}
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}
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pub(crate) fn from_data(data: InterpreterData) -> Self {
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let slider = TraceSlider::new(data.trace);
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Self {
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slider,
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streams: data.global_streams,
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}
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}
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pub(crate) fn try_get_generation(&self, position: TracePos) -> KeeperResult<u32> {
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use air_interpreter_data::*;
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let state = self
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.slider
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.state_at_position(position)
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.ok_or_else(|| KeeperError::NoElementAtPosition {
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position,
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trace_len: self.slider.trace_len(),
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})?;
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match state {
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ExecutedState::Call(CallResult::Executed(Value::Stream { generation, .. })) => Ok(*generation),
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// such Aps are always preceded by Fold where corresponding stream could be used,
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// so it's been already checked that res_generation is well-formed
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// and accessing 0th element is safe here
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ExecutedState::Ap(ap_result) => Ok(ap_result.res_generations[0]),
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state => Err(KeeperError::NoStreamState { state: state.clone() }),
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}
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}
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pub(crate) fn stream_generation(&self, stream_name: &str) -> Option<u32> {
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self.streams.get(stream_name).copied()
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}
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}
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