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/*
* ZeroTier One - Global Peer to Peer Ethernet
* Copyright (C) 2012-2013 ZeroTier Networks LLC
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* --
*
* ZeroTier may be used and distributed under the terms of the GPLv3, which
* are available at: http://www.gnu.org/licenses/gpl-3.0.html
*
* If you would like to embed ZeroTier into a commercial application or
* redistribute it in a modified binary form, please contact ZeroTier Networks
* LLC. Start here: http://www.zerotier.com/
*/
#ifndef _ZT_BLOBARRAY_HPP
#define _ZT_BLOBARRAY_HPP
#include <vector>
#include <string>
#include <algorithm>
namespace ZeroTier {
/**
* A vector of binary strings serializable in a packed format
*
* The format uses variable-length integers to indicate the length of each
* field. Each byte of the length has another byte with seven more significant
* bits if its 8th bit is set. Fields can be up to 2^28 in length.
*/
class BlobArray : public std::vector<std::string>
{
public:
inline std::string serialize() const
{
std::string r;
for(BlobArray::const_iterator i=begin();i!=end();++i) {
unsigned int flen = (unsigned int)i->length();
do {
unsigned char flenb = (unsigned char)(flen & 0x7f);
flen >>= 7;
flenb |= (flen) ? 0x80 : 0;
r.push_back((char)flenb);
} while (flen);
r.append(*i);
}
return r;
}
/**
* Deserialize, replacing the current contents of this array
*
* @param data Serialized binary data
* @param len Length of serialized data
*/
inline void deserialize(const void *data,unsigned int len)
{
clear();
for(unsigned int i=0;i<len;) {
unsigned int flen = 0;
unsigned int chunk = 0;
while (i < len) {
flen |= ((unsigned int)(((const unsigned char *)data)[i] & 0x7f)) << (7 * chunk++);
if (!(((const unsigned char *)data)[i++] & 0x80))
break;
}
flen = std::min(flen,len - i);
push_back(std::string(((const char *)data) + i,flen));
i += flen;
}
}
inline void deserialize(const std::string &data)
{
deserialize(data.data(),(unsigned int)data.length());
}
};
} // namespace ZeroTier
#endif
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