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conversions.cpp
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conversions.cpp
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#include <iostream>
#include <set>
#include <map>
#include <algorithm>
#include <cctype>
#include <string>
#include <sstream>
#include <vector>
#include <iterator>
#include <windows.h>
DWORD ConvertUnicode2CP(const wchar_t *szText, std::string &resultString, UINT codePage)
{
resultString.clear();
if (wcslen(szText) <= 0)
return ERROR_SUCCESS;
int iRes = WideCharToMultiByte(codePage, 0, szText, -1, NULL, 0, NULL, NULL);
if (iRes <= 0)
return GetLastError();
char *szTemp = new char[iRes];
iRes = WideCharToMultiByte(codePage, 0, szText, -1, szTemp, iRes, NULL, NULL);
if (iRes <= 0)
{
delete [] szTemp;
return GetLastError();
}
resultString = szTemp;
delete [] szTemp;
return ERROR_SUCCESS;
}
DWORD ConvertCP2Unicode(const char *szText, std::wstring &resultString, UINT codePage)
{
resultString.clear();
if (strlen(szText) <= 0)
return ERROR_SUCCESS;
int iRes = MultiByteToWideChar(codePage, 0, szText, -1, NULL, 0);
if (iRes <= 0)
return GetLastError();
wchar_t *szTemp = new wchar_t[iRes];
iRes = MultiByteToWideChar(codePage, 0, szText, -1, szTemp, iRes);
if (iRes <= 0)
{
delete [] szTemp;
return GetLastError();
}
resultString = szTemp;
delete [] szTemp;
return ERROR_SUCCESS;
}
std::wstring strtowstr( const std::string& as )
{
// deal with trivial case of empty string
if( as.empty() ) return std::wstring();
// determine required length of new string
size_t reqLength = ::MultiByteToWideChar( CP_UTF8, 0, as.c_str(), (int)as.length(), 0, 0 );
// construct new string of required length
std::wstring ret( reqLength, L'\0' );
// convert old string to new string
::MultiByteToWideChar( CP_UTF8, 0, as.c_str(), (int)as.length(), &ret[0], (int)ret.length() );
// return new string ( compiler should optimize this away )
return ret;
}
std::string wstrtostr( const std::wstring& as )
{
// deal with trivial case of empty string
if( as.empty() ) return std::string();
// determine required length of new string
size_t reqLength = ::WideCharToMultiByte( CP_UTF8, 0, as.c_str(), (int)as.length(), 0, 0, 0, 0 );
// construct new string of required length
std::string ret( reqLength, L'\0' );
// convert old string to new string
::WideCharToMultiByte( CP_UTF8, 0, as.c_str(), (int)as.length(), &ret[0], (int)ret.length(), 0, 0 );
// return new string ( compiler should optimize this away )
return ret;
}
std::vector<std::string> split(const std::string &s, char delim) {
std::vector<std::string> elems;
std::stringstream ss;
ss.str(s);
std::string item;
std::back_insert_iterator<std::vector<std::string>> result = std::back_inserter(elems);
while (std::getline(ss, item, delim)) {
*(result++) = item;
}
return elems;
}