ZipEntryUtf8To32ReadResource.hpp

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// @formatter:off
//
// Balau core C++ library
//
// Copyright (C) 2008 Bora Software (contact@borasoftware.com)
//
// Licensed under the Boost Software License - Version 1.0 - August 17th, 2003.
// See the LICENSE file for the full license text.
//


#ifndef COM_BORA_SOFTWARE__BALAU_RESOURCE__ZIP_ENTRY_UTF8_TO_32_READ_RESOURCE
#define COM_BORA_SOFTWARE__BALAU_RESOURCE__ZIP_ENTRY_UTF8_TO_32_READ_RESOURCE

#include <Balau/Resource/Utf8To32ReadResource.hpp>
#include <Balau/Resource/ByteReadResource.hpp>
#include <Balau/Resource/Impl/ZipEntrySource.hpp>

#include <boost/iostreams/code_converter.hpp>
#include <boost/iostreams/stream.hpp>

#include <codecvt>

namespace Balau::Resource {

class ZipEntry;

class ZipEntryUtf8To32ReadResource : public Utf8To32ReadResource {
    private: using idevice_utf8_utf32 = boost::iostreams::code_converter<std::istream, std::codecvt_utf8<char32_t, 0x10ffff, std::consume_header>>;
    private: using istream_utf8_utf32 = boost::iostreams::stream<idevice_utf8_utf32>;

    public: ~ZipEntryUtf8To32ReadResource() override = default;

    public: ZipEntryUtf8To32ReadResource(ZipEntryUtf8To32ReadResource && rhs) noexcept
        : entry(rhs.entry)
        , utf8Stream(std::move(rhs.utf8Stream))
        , ref(rhs.ref)
        , utf32Stream(std::move(rhs.utf32Stream)) {}

    public: void close() override {
        // NOP
    }

    public: const Uri & uri() const override;

    public: std::u32istream & readStream() override {
        return *utf32Stream;
    }

    public: explicit ZipEntryUtf8To32ReadResource(const ZipEntry & entry_);


    friend class ZipEntry;

    private: const ZipEntry & entry;
    private: std::unique_ptr<boost::iostreams::stream<Impl::ZipEntrySource>> utf8Stream;
    private: std::istream & ref;
    private: std::unique_ptr<istream_utf8_utf32> utf32Stream;
};

} // namespace Balau::Resource

#endif // COM_BORA_SOFTWARE__BALAU_RESOURCE__ZIP_ENTRY_UTF8_TO_32_READ_RESOURCE