mirror of
https://github.com/zerotier/ZeroTierOne.git
synced 2024-12-23 14:52:24 +00:00
95 lines
2.6 KiB
C++
95 lines
2.6 KiB
C++
/*
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* ZeroTier One - Global Peer to Peer Ethernet
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* Copyright (C) 2012-2013 ZeroTier Networks LLC
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* --
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*
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* ZeroTier may be used and distributed under the terms of the GPLv3, which
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* are available at: http://www.gnu.org/licenses/gpl-3.0.html
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*
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* If you would like to embed ZeroTier into a commercial application or
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* redistribute it in a modified binary form, please contact ZeroTier Networks
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* LLC. Start here: http://www.zerotier.com/
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*/
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#ifndef _ZT_BLOBARRAY_HPP
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#define _ZT_BLOBARRAY_HPP
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#include <vector>
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#include <string>
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#include <algorithm>
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namespace ZeroTier {
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/**
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* A vector of binary strings serializable in a packed format
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*
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* The format uses variable-length integers to indicate the length of each
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* field. Each byte of the length has another byte with seven more significant
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* bits if its 8th bit is set. Fields can be up to 2^28 in length.
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*/
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class BlobArray : public std::vector<std::string>
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{
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public:
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inline std::string serialize() const
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{
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std::string r;
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for(BlobArray::const_iterator i=begin();i!=end();++i) {
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unsigned int flen = (unsigned int)i->length();
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do {
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unsigned char flenb = (unsigned char)(flen & 0x7f);
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flen >>= 7;
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flenb |= (flen) ? 0x80 : 0;
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r.push_back((char)flenb);
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} while (flen);
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r.append(*i);
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}
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return r;
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}
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/**
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* Deserialize, replacing the current contents of this array
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*
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* @param data Serialized binary data
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* @param len Length of serialized data
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*/
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inline void deserialize(const void *data,unsigned int len)
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{
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clear();
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for(unsigned int i=0;i<len;) {
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unsigned int flen = 0;
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unsigned int chunk = 0;
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while (i < len) {
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flen |= ((unsigned int)(((const unsigned char *)data)[i] & 0x7f)) << (7 * chunk++);
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if (!(((const unsigned char *)data)[i++] & 0x80))
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break;
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}
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flen = std::min(flen,len - i);
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push_back(std::string(((const char *)data) + i,flen));
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i += flen;
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}
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}
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inline void deserialize(const std::string &data)
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{
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deserialize(data.data(),(unsigned int)data.length());
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}
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};
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} // namespace ZeroTier
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#endif
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