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monero/contrib/epee/include/string_tools.h
moneromooo-monero b750fb27b0
Pruning 
The blockchain prunes seven eighths of prunable tx data.
This saves about two thirds of the blockchain size, while
keeping the node useful as a sync source for an eighth
of the blockchain.

No other data is currently pruned.

There are three ways to prune a blockchain:

- run monerod with --prune-blockchain
- run "prune_blockchain" in the monerod console
- run the monero-blockchain-prune utility

The first two will prune in place. Due to how LMDB works, this
will not reduce the blockchain size on disk. Instead, it will
mark parts of the file as free, so that future data will use
that free space, causing the file to not grow until free space
grows scarce.

The third way will create a second database, a pruned copy of
the original one. Since this is a new file, this one will be
smaller than the original one.

Once the database is pruned, it will stay pruned as it syncs.
That is, there is no need to use --prune-blockchain again, etc.
2019-01-22 20:30:51 +00:00

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// Copyright (c) 2006-2013, Andrey N. Sabelnikov, www.sabelnikov.net
// All rights reserved.
//
// 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.
// * Neither the name of the Andrey N. Sabelnikov nor the
// names of its contributors may be used to endorse or promote products
// derived from this software without specific prior written permission.
//
// 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 OWNER 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 _STRING_TOOLS_H_
#define _STRING_TOOLS_H_
// Previously pulled in by ASIO, further cleanup still required ...
#ifdef _WIN32
# include <winsock2.h>
# include <windows.h>
#endif
#include <string.h>
#include <locale>
#include <cstdlib>
#include <string>
#include <type_traits>
#include <boost/lexical_cast.hpp>
#include <boost/algorithm/string/predicate.hpp>
#include "hex.h"
#include "memwipe.h"
#include "mlocker.h"
#include "span.h"
#include "warnings.h"
#ifndef OUT
#define OUT
#endif
#ifdef WINDOWS_PLATFORM
#pragma comment (lib, "Rpcrt4.lib")
#endif
static const constexpr unsigned char isx[256] =
{
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 10, 11, 12, 13, 14, 15, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 10, 11, 12, 13, 14, 15, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
};
namespace epee
{
namespace string_tools
{
//----------------------------------------------------------------------------
inline std::string buff_to_hex_nodelimer(const std::string& src)
{
return to_hex::string(to_byte_span(to_span(src)));
}
//----------------------------------------------------------------------------
inline bool parse_hexstr_to_binbuff(const epee::span<const char> s, epee::span<char>& res)
{
if (s.size() != res.size() * 2)
return false;
unsigned char *dst = (unsigned char *)&res[0];
const unsigned char *src = (const unsigned char *)s.data();
for(size_t i = 0; i < s.size(); i += 2)
{
int tmp = *src++;
tmp = isx[tmp];
if (tmp == 0xff) return false;
int t2 = *src++;
t2 = isx[t2];
if (t2 == 0xff) return false;
*dst++ = (tmp << 4) | t2;
}
return true;
}
//----------------------------------------------------------------------------
inline bool parse_hexstr_to_binbuff(const std::string& s, std::string& res)
{
if (s.size() & 1)
return false;
res.resize(s.size() / 2);
epee::span<char> rspan((char*)&res[0], res.size());
return parse_hexstr_to_binbuff(epee::to_span(s), rspan);
}
//----------------------------------------------------------------------------
PUSH_WARNINGS
DISABLE_GCC_WARNING(maybe-uninitialized)
template<class XType>
inline bool get_xtype_from_string(OUT XType& val, const std::string& str_id)
{
if (std::is_integral<XType>::value && !std::numeric_limits<XType>::is_signed && !std::is_same<XType, bool>::value)
{
for (char c : str_id)
{
if (!std::isdigit(c))
return false;
}
}
try
{
val = boost::lexical_cast<XType>(str_id);
return true;
}
catch(const std::exception& /*e*/)
{
//const char* pmsg = e.what();
return false;
}
catch(...)
{
return false;
}
return true;
}
POP_WARNINGS
//----------------------------------------------------------------------------
template<class XType>
inline bool xtype_to_string(const XType& val, std::string& str)
{
try
{
str = boost::lexical_cast<std::string>(val);
}
catch(...)
{
return false;
}
return true;
}
//----------------------------------------------------------------------------
std::string get_ip_string_from_int32(uint32_t ip);
//----------------------------------------------------------------------------
bool get_ip_int32_from_string(uint32_t& ip, const std::string& ip_str);
//----------------------------------------------------------------------------
inline bool parse_peer_from_string(uint32_t& ip, uint16_t& port, const std::string& addres)
{
//parse ip and address
std::string::size_type p = addres.find(':');
std::string ip_str, port_str;
if(p == std::string::npos)
{
port = 0;
ip_str = addres;
}
else
{
ip_str = addres.substr(0, p);
port_str = addres.substr(p+1, addres.size());
}
if(!get_ip_int32_from_string(ip, ip_str))
{
return false;
}
if(p != std::string::npos && !get_xtype_from_string(port, port_str))
{
return false;
}
return true;
}
inline std::string num_to_string_fast(int64_t val)
{
/*
char buff[30] = {0};
i64toa_s(val, buff, sizeof(buff)-1, 10);
return buff;*/
return boost::lexical_cast<std::string>(val);
}
//----------------------------------------------------------------------------
inline std::string to_string_hex(uint32_t val)
{
std::stringstream ss;
ss << std::hex << val;
std::string s;
ss >> s;
return s;
}
//----------------------------------------------------------------------------
inline bool compare_no_case(const std::string& str1, const std::string& str2)
{
return !boost::iequals(str1, str2);
}
//----------------------------------------------------------------------------
inline std::string& get_current_module_name()
{
static std::string module_name;
return module_name;
}
//----------------------------------------------------------------------------
inline std::string& get_current_module_folder()
{
static std::string module_folder;
return module_folder;
}
//----------------------------------------------------------------------------
#ifdef _WIN32
inline std::string get_current_module_path()
{
char pname [5000] = {0};
GetModuleFileNameA( NULL, pname, sizeof(pname));
pname[sizeof(pname)-1] = 0; //be happy ;)
return pname;
}
#endif
//----------------------------------------------------------------------------
inline bool set_module_name_and_folder(const std::string& path_to_process_)
{
std::string path_to_process = path_to_process_;
#ifdef _WIN32
path_to_process = get_current_module_path();
#endif
std::string::size_type a = path_to_process.rfind( '\\' );
if(a == std::string::npos )
{
a = path_to_process.rfind( '/' );
}
if ( a != std::string::npos )
{
get_current_module_name() = path_to_process.substr(a+1, path_to_process.size());
get_current_module_folder() = path_to_process.substr(0, a);
return true;
}else
return false;
}
//----------------------------------------------------------------------------
inline bool trim_left(std::string& str)
{
for(std::string::iterator it = str.begin(); it!= str.end() && isspace(static_cast<unsigned char>(*it));)
str.erase(str.begin());
return true;
}
//----------------------------------------------------------------------------
inline bool trim_right(std::string& str)
{
for(std::string::reverse_iterator it = str.rbegin(); it!= str.rend() && isspace(static_cast<unsigned char>(*it));)
str.erase( --((it++).base()));
return true;
}
//----------------------------------------------------------------------------
inline std::string& trim(std::string& str)
{
trim_left(str);
trim_right(str);
return str;
}
//----------------------------------------------------------------------------
inline std::string trim(const std::string& str_)
{
std::string str = str_;
trim_left(str);
trim_right(str);
return str;
}
//----------------------------------------------------------------------------
inline std::string pad_string(std::string s, size_t n, char c = ' ', bool prepend = false)
{
if (s.size() < n)
{
if (prepend)
s = std::string(n - s.size(), c) + s;
else
s.append(n - s.size(), c);
}
return s;
}
//----------------------------------------------------------------------------
template<class t_pod_type>
std::string pod_to_hex(const t_pod_type& s)
{
static_assert(std::is_standard_layout<t_pod_type>(), "expected standard layout type");
return to_hex::string(as_byte_span(s));
}
//----------------------------------------------------------------------------
template<class t_pod_type>
bool hex_to_pod(const std::string& hex_str, t_pod_type& s)
{
static_assert(std::is_pod<t_pod_type>::value, "expected pod type");
if(sizeof(s)*2 != hex_str.size())
return false;
epee::span<char> rspan((char*)&s, sizeof(s));
return parse_hexstr_to_binbuff(epee::to_span(hex_str), rspan);
}
//----------------------------------------------------------------------------
template<class t_pod_type>
bool hex_to_pod(const std::string& hex_str, tools::scrubbed<t_pod_type>& s)
{
return hex_to_pod(hex_str, unwrap(s));
}
//----------------------------------------------------------------------------
template<class t_pod_type>
bool hex_to_pod(const std::string& hex_str, epee::mlocked<t_pod_type>& s)
{
return hex_to_pod(hex_str, unwrap(s));
}
//----------------------------------------------------------------------------
bool validate_hex(uint64_t length, const std::string& str);
//----------------------------------------------------------------------------
inline std::string get_extension(const std::string& str)
{
std::string res;
std::string::size_type pos = str.rfind('.');
if(std::string::npos == pos)
return res;
res = str.substr(pos+1, str.size()-pos);
return res;
}
//----------------------------------------------------------------------------
inline std::string cut_off_extension(const std::string& str)
{
std::string res;
std::string::size_type pos = str.rfind('.');
if(std::string::npos == pos)
return str;
res = str.substr(0, pos);
return res;
}
//----------------------------------------------------------------------------
#ifdef _WIN32
inline std::wstring utf8_to_utf16(const std::string& str)
{
if (str.empty())
return {};
int wstr_size = MultiByteToWideChar(CP_UTF8, 0, &str[0], str.size(), NULL, 0);
if (wstr_size == 0)
{
throw std::runtime_error(std::error_code(GetLastError(), std::system_category()).message());
}
std::wstring wstr(wstr_size, wchar_t{});
if (!MultiByteToWideChar(CP_UTF8, 0, &str[0], str.size(), &wstr[0], wstr_size))
{
throw std::runtime_error(std::error_code(GetLastError(), std::system_category()).message());
}
return wstr;
}
inline std::string utf16_to_utf8(const std::wstring& wstr)
{
if (wstr.empty())
return {};
int str_size = WideCharToMultiByte(CP_UTF8, 0, &wstr[0], wstr.size(), NULL, 0, NULL, NULL);
if (str_size == 0)
{
throw std::runtime_error(std::error_code(GetLastError(), std::system_category()).message());
}
std::string str(str_size, char{});
if (!WideCharToMultiByte(CP_UTF8, 0, &wstr[0], wstr.size(), &str[0], str_size, NULL, NULL))
{
throw std::runtime_error(std::error_code(GetLastError(), std::system_category()).message());
}
return str;
}
#endif
}
}
#endif //_STRING_TOOLS_H_
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