cannam@62: // Copyright (c) 2014 Sandstorm Development Group, Inc. and contributors
cannam@62: // Licensed under the MIT License:
cannam@62: //
cannam@62: // Permission is hereby granted, free of charge, to any person obtaining a copy
cannam@62: // of this software and associated documentation files (the "Software"), to deal
cannam@62: // in the Software without restriction, including without limitation the rights
cannam@62: // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
cannam@62: // copies of the Software, and to permit persons to whom the Software is
cannam@62: // furnished to do so, subject to the following conditions:
cannam@62: //
cannam@62: // The above copyright notice and this permission notice shall be included in
cannam@62: // all copies or substantial portions of the Software.
cannam@62: //
cannam@62: // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
cannam@62: // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
cannam@62: // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
cannam@62: // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
cannam@62: // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
cannam@62: // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
cannam@62: // THE SOFTWARE.
cannam@62: 
cannam@62: /*
cannam@62:  * Compatibility layer for stdlib iostream
cannam@62:  */
cannam@62: 
cannam@62: #ifndef KJ_STD_IOSTREAM_H_
cannam@62: #define KJ_STD_IOSTREAM_H_
cannam@62: 
cannam@62: #if defined(__GNUC__) && !KJ_HEADER_WARNINGS
cannam@62: #pragma GCC system_header
cannam@62: #endif
cannam@62: 
cannam@62: #include "../io.h"
cannam@62: #include <iostream>
cannam@62: 
cannam@62: namespace kj {
cannam@62: namespace std {
cannam@62: 
cannam@62: class StdOutputStream: public kj::OutputStream {
cannam@62: 
cannam@62: public:
cannam@62:   explicit StdOutputStream(::std::ostream& stream) : stream_(stream) {}
cannam@62:   ~StdOutputStream() noexcept(false) {}
cannam@62: 
cannam@62:   virtual void write(const void* src, size_t size) override {
cannam@62:     // Always writes the full size.
cannam@62: 
cannam@62:     stream_.write((char*)src, size);
cannam@62:   }
cannam@62: 
cannam@62:   virtual void write(ArrayPtr<const ArrayPtr<const byte>> pieces) override {
cannam@62:     // Equivalent to write()ing each byte array in sequence, which is what the
cannam@62:     // default implementation does. Override if you can do something better,
cannam@62:     // e.g. use writev() to do the write in a single syscall.
cannam@62: 
cannam@62:     for (auto piece : pieces) {
cannam@62:       write(piece.begin(), piece.size());
cannam@62:     }
cannam@62:   }
cannam@62: 
cannam@62: private:
cannam@62:   ::std::ostream& stream_;
cannam@62: 
cannam@62: };
cannam@62: 
cannam@62: class StdInputStream: public kj::InputStream {
cannam@62: 
cannam@62: public:
cannam@62:   explicit StdInputStream(::std::istream& stream) : stream_(stream) {}
cannam@62:   ~StdInputStream() noexcept(false) {}
cannam@62: 
cannam@62:   virtual size_t tryRead(
cannam@62:       void* buffer, size_t minBytes, size_t maxBytes) override {
cannam@62:     // Like read(), but may return fewer than minBytes on EOF.
cannam@62: 
cannam@62:     stream_.read((char*)buffer, maxBytes);
cannam@62:     return stream_.gcount();
cannam@62:   }
cannam@62: 
cannam@62: private:
cannam@62:   ::std::istream& stream_;
cannam@62: 
cannam@62: };
cannam@62: 
cannam@62: }  // namespace std
cannam@62: }  // namespace kj
cannam@62: 
cannam@62: #endif  // KJ_STD_IOSTREAM_H_