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monero/contrib/epee/include/string_tools.h
Lee Clagett 4a8f96f95d Improvements for epee binary to hex functions: 
- Performance improvements
  - Added `span` for zero-copy pointer+length arguments
  - Added `std::ostream` overload for direct writing to output buffers
  - Removal of unused `string_tools::buff_to_hex`
2017-04-11 16:35:00 -04:00

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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 <objbase.h>
#include <locale>
#include <cstdlib>
#include <iomanip>
#include <map>
#include <type_traits>
#include <boost/uuid/uuid.hpp>
#include <boost/uuid/uuid_io.hpp>
#include <boost/lexical_cast.hpp>
#include <boost/algorithm/string.hpp>
#include "hex.h"
#include "span.h"
#include "warnings.h"
#ifndef OUT
#define OUT
#endif
#ifdef WINDOWS_PLATFORM
#pragma comment (lib, "Rpcrt4.lib")
#endif
namespace epee
{
namespace string_tools
{
inline std::wstring get_str_from_guid(const boost::uuids::uuid& rid)
{
return boost::lexical_cast<std::wstring>(rid);
}
//----------------------------------------------------------------------------
inline std::string get_str_from_guid_a(const boost::uuids::uuid& rid)
{
return boost::lexical_cast<std::string>(rid);
}
//----------------------------------------------------------------------------
inline bool get_guid_from_string( boost::uuids::uuid& inetifer, std::wstring str_id)
{
if(str_id.size() < 36)
return false;
if('{' == *str_id.begin())
str_id.erase(0, 1);
if('}' == *(--str_id.end()))
str_id.erase(--str_id.end());
try
{
inetifer = boost::lexical_cast<boost::uuids::uuid>(str_id);
return true;
}
catch(...)
{
return false;
}
}
//----------------------------------------------------------------------------
inline bool get_guid_from_string(OUT boost::uuids::uuid& inetifer, const std::string& str_id)
{
std::string local_str_id = str_id;
if(local_str_id.size() < 36)
return false;
if('{' == *local_str_id.begin())
local_str_id.erase(0, 1);
if('}' == *(--local_str_id.end()))
local_str_id.erase(--local_str_id.end());
try
{
inetifer = boost::lexical_cast<boost::uuids::uuid>(local_str_id);
return true;
}
catch(...)
{
return false;
}
}
//----------------------------------------------------------------------------
inline std::string buff_to_hex_nodelimer(const std::string& src)
{
return to_hex::string(to_byte_span(to_span(src)));
}
//----------------------------------------------------------------------------
template<class CharT>
bool parse_hexstr_to_binbuff(const std::basic_string<CharT>& s, std::basic_string<CharT>& res, bool allow_partial_byte = false)
{
res.clear();
if (!allow_partial_byte && (s.size() & 1))
return false;
try
{
long v = 0;
for(size_t i = 0; i < (s.size() + 1) / 2; i++)
{
CharT byte_str[3];
size_t copied = s.copy(byte_str, 2, 2 * i);
byte_str[copied] = CharT(0);
CharT* endptr;
v = strtoul(byte_str, &endptr, 16);
if (v < 0 || 0xFF < v || endptr != byte_str + copied)
{
return false;
}
res.push_back(static_cast<unsigned char>(v));
}
return true;
}catch(...)
{
return false;
}
}
//----------------------------------------------------------------------------
template<class t_pod_type>
bool parse_tpod_from_hex_string(const std::string& str_hash, t_pod_type& t_pod)
{
static_assert(std::is_pod<t_pod_type>::value, "expected pod type");
std::string buf;
bool res = epee::string_tools::parse_hexstr_to_binbuff(str_hash, buf);
if (!res || buf.size() != sizeof(t_pod_type))
{
return false;
}
else
{
buf.copy(reinterpret_cast<char *>(&t_pod), sizeof(t_pod_type));
return true;
}
}
//----------------------------------------------------------------------------
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(std::exception& /*e*/)
{
//const char* pmsg = e.what();
return false;
}
catch(...)
{
return false;
}
return true;
}
POP_WARNINGS
//---------------------------------------------------
template<typename int_t>
bool get_xnum_from_hex_string(const std::string str, int_t& res )
{
try
{
std::stringstream ss;
ss << std::hex << str;
ss >> res;
return true;
}
catch(...)
{
return false;
}
}
//----------------------------------------------------------------------------
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;
}
typedef std::map<std::string, std::string> command_line_params_a;
typedef std::map<std::wstring, std::wstring> command_line_params_w;
template<class t_string>
bool parse_commandline(std::map<t_string, t_string>& res, int argc, char** argv)
{
t_string key;
for(int i = 1; i < argc; i++)
{
if(!argv[i])
break;
t_string s = argv[i];
std::string::size_type p = s.find('=');
if(std::string::npos == p)
{
res[s] = "";
}else
{
std::string ss;
t_string nm = s.substr(0, p);
t_string vl = s.substr(p+1, s.size());
res[nm] = vl;
}
}
return true;
}
/* template<typename t_type>
bool get_xparam_from_command_line(const std::map<std::string, std::string>& res, const std::basic_string<typename t_string::value_type> & key, t_type& val)
{
}
*/
template<class t_string, typename t_type>
bool get_xparam_from_command_line(const std::map<t_string, t_string>& res, const t_string & key, t_type& val)
{
typename std::map<t_string, t_string>::const_iterator it = res.find(key);
if(it == res.end())
return false;
if(it->second.size())
{
return get_xtype_from_string(val, it->second);
}
return true;
}
template<class t_string, typename t_type>
t_type get_xparam_from_command_line(const std::map<t_string, t_string>& res, const t_string & key, const t_type& default_value)
{
typename std::map<t_string, t_string>::const_iterator it = res.find(key);
if(it == res.end())
return default_value;
if(it->second.size())
{
t_type s;
get_xtype_from_string(s, it->second);
return s;
}
return default_value;
}
template<class t_string>
bool have_in_command_line(const std::map<t_string, t_string>& res, const std::basic_string<typename t_string::value_type>& key)
{
typename std::map<t_string, t_string>::const_iterator it = res.find(key);
if(it == res.end())
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, uint32_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;
}
//----------------------------------------------------------------------------
template<typename t>
inline std::string get_t_as_hex_nwidth(const t& v, std::streamsize w = 8)
{
std::stringstream ss;
ss << std::setfill ('0') << std::setw (w) << std::hex << std::noshowbase;
ss << v;
return ss.str();
}
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 bool string_to_num_fast(const std::string& buff, int64_t& val)
{
//return get_xtype_from_string(val, buff);
#if (defined _MSC_VER)
val = _atoi64(buff.c_str());
#else
val = atoll(buff.c_str());
#endif
/*
* val = atoi64(buff.c_str());
*/
if(buff != "0" && val == 0)
return false;
return true;
}
//----------------------------------------------------------------------------
inline bool string_to_num_fast(const std::string& buff, int& val)
{
val = atoi(buff.c_str());
if(buff != "0" && val == 0)
return false;
return true;
}
//----------------------------------------------------------------------------
#ifdef WINDOWS_PLATFORM
inline std::string system_time_to_string(const SYSTEMTIME& st)
{
/*
TIME_ZONE_INFORMATION tzi;
GetTimeZoneInformation(&tzi);
SystemTimeToTzSpecificLocalTime(&tzi, &stUTC, &stLocal);
*/
char szTime[25], szDate[25];
::GetTimeFormatA(
LOCALE_USER_DEFAULT, // locale
TIME_FORCE24HOURFORMAT, // options
&st, // time
NULL, // time format string
szTime, // formatted string buffer
25 // size of string buffer
);
::GetDateFormatA(
LOCALE_USER_DEFAULT, // locale
NULL, // options
&st, // date
NULL, // date format
szDate, // formatted string buffer
25 // size of buffer
);
szTime[24] = szDate[24] = 0; //be happy :)
std::string res = szDate;
(res += " " )+= szTime;
return res;
}
#endif
//----------------------------------------------------------------------------
inline bool compare_no_case(const std::string& str1, const std::string& str2)
{
return !boost::iequals(str1, str2);
}
//----------------------------------------------------------------------------
inline bool compare_no_case(const std::wstring& str1, const std::wstring& str2)
{
return !boost::iequals(str1, str2);
}
//----------------------------------------------------------------------------
inline bool is_match_prefix(const std::wstring& str1, const std::wstring& prefix)
{
if(prefix.size()>str1.size())
return false;
if(!compare_no_case(str1.substr(0, prefix.size()), prefix))
return true;
else
return false;
}
//----------------------------------------------------------------------------
inline bool is_match_prefix(const std::string& str1, const std::string& prefix)
{
if(prefix.size()>str1.size())
return false;
if(!compare_no_case(str1.substr(0, prefix.size()), prefix))
return true;
else
return false;
}
//----------------------------------------------------------------------------
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;
}
//----------------------------------------------------------------------------
template<class t_pod_type>
std::string pod_to_hex(const t_pod_type& s)
{
static_assert(std::is_pod<t_pod_type>::value, "expected pod 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");
std::string hex_str_tr = trim(hex_str);
if(sizeof(s)*2 != hex_str.size())
return false;
std::string bin_buff;
if(!parse_hexstr_to_binbuff(hex_str_tr, bin_buff))
return false;
if(bin_buff.size()!=sizeof(s))
return false;
s = *(t_pod_type*)bin_buff.data();
return true;
}
//----------------------------------------------------------------------------
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 get_filename_from_path(const std::string& str)
{
std::string res;
std::string::size_type pos = str.rfind('\\');
if(std::string::npos == pos)
return str;
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 _WININET_
inline std::string get_string_from_systemtime(const SYSTEMTIME& sys_time)
{
std::string result_string;
char buff[100] = {0};
BOOL res = ::InternetTimeFromSystemTimeA(&sys_time, INTERNET_RFC1123_FORMAT, buff, 99);
if(!res)
{
LOG_ERROR("Failed to load SytemTime to string");
}
result_string = buff;
return result_string;
}
//-------------------------------------------------------------------------------------
inline SYSTEMTIME get_systemtime_from_string(const std::string& buff)
{
SYSTEMTIME result_time = {0};
BOOL res = ::InternetTimeToSystemTimeA(buff.c_str(), &result_time, NULL);
if(!res)
{
LOG_ERROR("Failed to load SytemTime from string " << buff << "interval set to 15 minutes");
}
return result_time;
}
#endif
#ifdef WINDOWS_PLATFORM
static const DWORD INFO_BUFFER_SIZE = 10000;
static const wchar_t* get_pc_name()
{
static wchar_t info[INFO_BUFFER_SIZE];
static DWORD bufCharCount = INFO_BUFFER_SIZE;
static bool init = false;
if (!init) {
if (!GetComputerNameW( info, &bufCharCount ))
info[0] = 0;
else
init = true;
}
return info;
}
static const wchar_t* get_user_name()
{
static wchar_t info[INFO_BUFFER_SIZE];
static DWORD bufCharCount = INFO_BUFFER_SIZE;
static bool init = false;
if (!init) {
if (!GetUserNameW( info, &bufCharCount ))
info[0] = 0;
else
init = true;
}
return info;
}
#endif
#ifdef _LM_
static const wchar_t* get_domain_name()
{
static wchar_t info[INFO_BUFFER_SIZE];
static DWORD bufCharCount = 0;
static bool init = false;
if (!init) {
LPWSTR domain( NULL );
NETSETUP_JOIN_STATUS status;
info[0] = 0;
if (NET_API_STATUS result = NetGetJoinInformation( NULL, &domain, &status ))
{
LOG_ERROR("get_domain_name error: " << log_space::get_win32_err_descr(result));
} else
{
StringCchCopyW( info, sizeof(info)/sizeof( info[0] ), domain );
NetApiBufferFree((void*)domain);
init = true;
}
}
return info;
}
#endif
#ifdef WINDOWS_PLATFORM
inline
std::string load_resource_string_a(int id, const char* pmodule_name = NULL)
{
//slow realization
HMODULE h = ::GetModuleHandleA( pmodule_name );
char buff[2000] = {0};
::LoadStringA( h, id, buff, sizeof(buff));
buff[sizeof(buff)-1] = 0; //be happy :)
return buff;
}
inline
std::wstring load_resource_string_w(int id, const char* pmodule_name = NULL)
{
//slow realization
HMODULE h = ::GetModuleHandleA( pmodule_name );
wchar_t buff[2000] = {0};
::LoadStringW( h, id, buff, sizeof(buff) / sizeof( buff[0] ) );
buff[(sizeof(buff)/sizeof(buff[0]))-1] = 0; //be happy :)
return buff;
}
#endif
}
}
#endif //_STRING_TOOLS_H_
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