FakeStream.h

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// Copyright 2024 libsese
//
// 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.
 
#pragma once
 
#include "sese/Config.h"
#include "sese/io/Closeable.h"
#include "sese/io/PeekableStream.h"
#include "sese/io/Stream.h"
 
#include <istream>
#include <ostream>
 
namespace sese::io {
 
// GCOVR_EXCL_START
 
template<typename T>
class FakeStream : public Stream {
public:
    explicit FakeStream(T *t) : t(t) {}
 
    int64_t read(void *buffer, size_t length) override { return t->read(buffer, length); }
    int64_t write(const void *buffer, size_t length) override { return t->write(buffer, length); };
 
protected:
    T *t;
};
 
template<typename T>
class ClosableFakeStream : public FakeStream<T>, public sese::io::Closeable {
public:
    explicit ClosableFakeStream(T *t) : FakeStream<T>(t) {}
    void close() override { this->t->close(); }
};
 
class StdInputStreamWrapper final
    : public InputStream,
      public PeekableStream {
public:
    explicit StdInputStreamWrapper(std::istream &stream);
 
    int64_t read(void *buffer, size_t length) override;
 
    int64_t peek(void *buffer, size_t length) override;
 
    int64_t trunc(size_t length) override;
 
private:
    std::istream &stream;
};
 
class StdOutputStreamWrapper final
    : public OutputStream {
public:
    explicit StdOutputStreamWrapper(std::ostream &stream);
 
    int64_t write(const void *buffer, size_t length) override;
 
private:
    std::ostream &stream;
    std::streamoff latest;
};
 
// GCOVR_EXCL_STOP
 
} // namespace sese::io