55 lines
2.4 KiB
C++
55 lines
2.4 KiB
C++
/*
|
|
* Copyright (c) 2015 Cryptonomex, Inc., and contributors.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
|
|
*
|
|
* 1. Any modified source or binaries are used only with the BitShares network.
|
|
*
|
|
* 2. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
|
|
*
|
|
* 3. 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 COPYRIGHT HOLDER 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.
|
|
*
|
|
*/
|
|
#pragma once
|
|
|
|
namespace graphene { namespace utilities {
|
|
|
|
template<size_t BlockSize=16, char PaddingChar=' '>
|
|
class padding_ostream : public fc::buffered_ostream {
|
|
public:
|
|
padding_ostream( fc::ostream_ptr o, size_t bufsize = 4096 ) : buffered_ostream(o, bufsize) {}
|
|
virtual ~padding_ostream() {}
|
|
|
|
virtual size_t writesome( const char* buffer, size_t len ) {
|
|
auto out = buffered_ostream::writesome(buffer, len);
|
|
bytes_out += out;
|
|
bytes_out %= BlockSize;
|
|
return out;
|
|
}
|
|
virtual size_t writesome( const std::shared_ptr<const char>& buf, size_t len, size_t offset ) {
|
|
auto out = buffered_ostream::writesome(buf, len, offset);
|
|
bytes_out += out;
|
|
bytes_out %= BlockSize;
|
|
return out;
|
|
}
|
|
virtual void flush() {
|
|
static const char pad = PaddingChar;
|
|
while( bytes_out % BlockSize )
|
|
writesome(&pad, 1);
|
|
buffered_ostream::flush();
|
|
}
|
|
|
|
private:
|
|
size_t bytes_out = 0;
|
|
};
|
|
|
|
} } //graphene::utilities
|
|
|