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89 lines
2.6 KiB
89 lines
2.6 KiB
6 years ago
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// Copyright (c) 2014 Sandstorm Development Group, Inc. and contributors
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// Licensed under the MIT License:
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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/*
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* Compatibility layer for stdlib iostream
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*/
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#ifndef KJ_STD_IOSTREAM_H_
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#define KJ_STD_IOSTREAM_H_
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#if defined(__GNUC__) && !KJ_HEADER_WARNINGS
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#pragma GCC system_header
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#endif
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#include "../io.h"
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#include <iostream>
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namespace kj {
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namespace std {
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class StdOutputStream: public kj::OutputStream {
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public:
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explicit StdOutputStream(::std::ostream& stream) : stream_(stream) {}
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~StdOutputStream() noexcept(false) {}
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virtual void write(const void* src, size_t size) override {
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// Always writes the full size.
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stream_.write((char*)src, size);
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}
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virtual void write(ArrayPtr<const ArrayPtr<const byte>> pieces) override {
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// Equivalent to write()ing each byte array in sequence, which is what the
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// default implementation does. Override if you can do something better,
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// e.g. use writev() to do the write in a single syscall.
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for (auto piece : pieces) {
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write(piece.begin(), piece.size());
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}
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}
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private:
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::std::ostream& stream_;
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};
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class StdInputStream: public kj::InputStream {
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public:
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explicit StdInputStream(::std::istream& stream) : stream_(stream) {}
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~StdInputStream() noexcept(false) {}
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virtual size_t tryRead(
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void* buffer, size_t minBytes, size_t maxBytes) override {
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// Like read(), but may return fewer than minBytes on EOF.
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stream_.read((char*)buffer, maxBytes);
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return stream_.gcount();
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}
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private:
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::std::istream& stream_;
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};
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} // namespace std
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} // namespace kj
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#endif // KJ_STD_IOSTREAM_H_
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