141 lines
3.5 KiB
C++
141 lines
3.5 KiB
C++
/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
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file Copyright.txt or https://cmake.org/licensing for details. */
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#pragma once
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#include <cassert>
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#include <istream>
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#include <cm3p/uv.h>
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#include "cmUVHandlePtr.h"
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#include "cmUVStreambuf.h"
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template <typename CharT, typename Traits = std::char_traits<CharT>>
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class cmBasicUVIStream : public std::basic_istream<CharT>
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{
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public:
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cmBasicUVIStream();
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cmBasicUVIStream(uv_stream_t* stream);
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bool is_open() const;
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void open(uv_stream_t* stream);
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void close();
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private:
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cmBasicUVStreambuf<CharT, Traits> Buffer;
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};
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template <typename CharT, typename Traits>
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cmBasicUVIStream<CharT, Traits>::cmBasicUVIStream()
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: std::basic_istream<CharT, Traits>(&this->Buffer)
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{
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}
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template <typename CharT, typename Traits>
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cmBasicUVIStream<CharT, Traits>::cmBasicUVIStream(uv_stream_t* stream)
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: cmBasicUVIStream()
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{
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this->open(stream);
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}
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template <typename CharT, typename Traits>
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bool cmBasicUVIStream<CharT, Traits>::is_open() const
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{
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return this->Buffer.is_open();
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}
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template <typename CharT, typename Traits>
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void cmBasicUVIStream<CharT, Traits>::open(uv_stream_t* stream)
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{
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this->Buffer.open(stream);
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}
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template <typename CharT, typename Traits>
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void cmBasicUVIStream<CharT, Traits>::close()
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{
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this->Buffer.close();
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}
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using cmUVIStream = cmBasicUVIStream<char>;
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template <typename CharT, typename Traits = std::char_traits<CharT>>
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class cmBasicUVPipeIStream : public cmBasicUVIStream<CharT, Traits>
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{
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public:
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cmBasicUVPipeIStream();
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cmBasicUVPipeIStream(uv_loop_t& loop, int fd);
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using cmBasicUVIStream<CharT, Traits>::is_open;
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void open(uv_loop_t& loop, int fd);
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void close();
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private:
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cm::uv_pipe_ptr Pipe;
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};
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template <typename CharT, typename Traits>
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cmBasicUVPipeIStream<CharT, Traits>::cmBasicUVPipeIStream() = default;
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template <typename CharT, typename Traits>
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cmBasicUVPipeIStream<CharT, Traits>::cmBasicUVPipeIStream(uv_loop_t& loop,
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int fd)
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{
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this->open(loop, fd);
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}
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template <typename CharT, typename Traits>
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void cmBasicUVPipeIStream<CharT, Traits>::open(uv_loop_t& loop, int fd)
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{
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this->Pipe.init(loop, 0);
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uv_pipe_open(this->Pipe, fd);
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this->cmBasicUVIStream<CharT, Traits>::open(this->Pipe);
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}
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template <typename CharT, typename Traits>
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void cmBasicUVPipeIStream<CharT, Traits>::close()
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{
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this->cmBasicUVIStream<CharT, Traits>::close();
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this->Pipe.reset();
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}
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using cmUVPipeIStream = cmBasicUVPipeIStream<char>;
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template <typename ReadCallback, typename FinishCallback>
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void cmUVStreamRead(uv_stream_t* stream, ReadCallback onRead,
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FinishCallback onFinish)
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{
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struct ReadData
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{
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std::vector<char> Buffer;
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ReadCallback OnRead;
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FinishCallback OnFinish;
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};
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stream->data = new ReadData{ {}, std::move(onRead), std::move(onFinish) };
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uv_read_start(
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stream,
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[](uv_handle_t* s, std::size_t suggestedSize, uv_buf_t* buffer) {
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auto* data = static_cast<ReadData*>(s->data);
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data->Buffer.resize(suggestedSize);
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buffer->base = data->Buffer.data();
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buffer->len = suggestedSize;
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},
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[](uv_stream_t* s, ssize_t nread, const uv_buf_t* buffer) {
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auto* data = static_cast<ReadData*>(s->data);
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if (nread > 0) {
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(void)buffer;
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assert(buffer->base == data->Buffer.data());
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data->Buffer.resize(nread);
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data->OnRead(std::move(data->Buffer));
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} else if (nread < 0 /*|| nread == UV_EOF*/) {
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data->OnFinish();
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uv_read_stop(s);
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delete data;
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}
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});
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}
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