52 lines
2.3 KiB
C++
52 lines
2.3 KiB
C++
/*
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* Copyright (c) 2015, Cryptonomex, Inc.
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* All rights reserved.
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*
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* This source code is provided for evaluation in private test networks only, until September 8, 2015. After this date, this license expires and
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* the code may not be used, modified or distributed for any purpose. Redistribution and use in source and binary forms, with or without modification,
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* are permitted until September 8, 2015, provided that the following conditions are met:
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*
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* 1. The code and/or derivative works are used only for private test networks consisting of no more than 10 P2P nodes.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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namespace graphene { namespace utilities {
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template<size_t BlockSize=16, char PaddingChar=' '>
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class padding_ostream : public fc::buffered_ostream {
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public:
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padding_ostream( fc::ostream_ptr o, size_t bufsize = 4096 ) : buffered_ostream(o, bufsize) {}
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virtual ~padding_ostream() {}
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virtual size_t writesome( const char* buffer, size_t len ) {
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auto out = buffered_ostream::writesome(buffer, len);
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bytes_out += out;
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bytes_out %= BlockSize;
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return out;
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}
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virtual size_t writesome( const std::shared_ptr<const char>& buf, size_t len, size_t offset ) {
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auto out = buffered_ostream::writesome(buf, len, offset);
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bytes_out += out;
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bytes_out %= BlockSize;
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return out;
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}
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virtual void flush() {
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static const char pad = PaddingChar;
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while( bytes_out % BlockSize )
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writesome(&pad, 1);
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buffered_ostream::flush();
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}
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private:
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size_t bytes_out = 0;
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};
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} } //graphene::utilities
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