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/*
* Copyright (C) 2014-2018 Max Kellermann <max.kellermann@gmail.com>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef BUFFERED_OUTPUT_STREAM_HXX
#define BUFFERED_OUTPUT_STREAM_HXX
#include "check.h"
#include "Compiler.h"
#include "util/DynamicFifoBuffer.hxx"
#include <stddef.h>
#ifdef _UNICODE
#include <wchar.h>
#endif
class OutputStream;
/**
* An #OutputStream wrapper that buffers its output to reduce the
* number of OutputStream::Write() calls.
*
* All wchar_t based strings are converted to UTF-8.
*/
class BufferedOutputStream {
OutputStream &os;
DynamicFifoBuffer<char> buffer;
public:
explicit BufferedOutputStream(OutputStream &_os)
:os(_os), buffer(32768) {}
void Write(const void *data, size_t size);
void Write(const char &ch) {
Write(&ch, sizeof(ch));
}
void Write(const char *p);
gcc_printf(2,3)
void Format(const char *fmt, ...);
#ifdef _UNICODE
void Write(const wchar_t &ch) {
WriteWideToUTF8(&ch, 1);
}
void Write(const wchar_t *p);
#endif
/**
* Write buffer contents to the #OutputStream.
*/
void Flush();
private:
bool AppendToBuffer(const void *data, size_t size) noexcept;
#ifdef _UNICODE
void WriteWideToUTF8(const wchar_t *p, size_t length);
#endif
};
#endif
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