gsp-wasm-interface-common 7.0.0

Types and traits for interfacing between the host and the wasm runtime.
Documentation 
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// This file is part of Substrate.

// Copyright (C) Parity Technologies (UK) Ltd.
// SPDX-License-Identifier: Apache-2.0

// 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.

//! Implementation of conversions between Substrate and wasmi types.
use crate::{Signature, Value, ValueType};
use sp_std::vec::Vec;

impl From<Value> for wasmi::RuntimeValue {
    fn from(value: Value) -> Self {
        match value {
            Value::I32(val) => Self::I32(val),
            Value::I64(val) => Self::I64(val),
            Value::F32(val) => Self::F32(val.into()),
            Value::F64(val) => Self::F64(val.into()),
        }
    }
}

impl From<wasmi::RuntimeValue> for Value {
    fn from(value: wasmi::RuntimeValue) -> Self {
        match value {
            wasmi::RuntimeValue::I32(val) => Self::I32(val),
            wasmi::RuntimeValue::I64(val) => Self::I64(val),
            wasmi::RuntimeValue::F32(val) => Self::F32(val.into()),
            wasmi::RuntimeValue::F64(val) => Self::F64(val.into()),
        }
    }
}

impl From<ValueType> for wasmi::ValueType {
    fn from(value: ValueType) -> Self {
        match value {
            ValueType::I32 => Self::I32,
            ValueType::I64 => Self::I64,
            ValueType::F32 => Self::F32,
            ValueType::F64 => Self::F64,
        }
    }
}

impl From<wasmi::ValueType> for ValueType {
    fn from(value: wasmi::ValueType) -> Self {
        match value {
            wasmi::ValueType::I32 => Self::I32,
            wasmi::ValueType::I64 => Self::I64,
            wasmi::ValueType::F32 => Self::F32,
            wasmi::ValueType::F64 => Self::F64,
        }
    }
}

impl From<Signature> for wasmi::Signature {
    fn from(sig: Signature) -> Self {
        let args = sig.args.iter().map(|a| (*a).into()).collect::<Vec<_>>();
        wasmi::Signature::new(args, sig.return_value.map(Into::into))
    }
}

impl From<&wasmi::Signature> for Signature {
    fn from(sig: &wasmi::Signature) -> Self {
        Signature::new(
            sig.params()
                .iter()
                .copied()
                .map(Into::into)
                .collect::<Vec<_>>(),
            sig.return_type().map(Into::into),
        )
    }
}