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Toshihiro Shimizu 890ddd
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#include "tconvert.h"
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//#include "texception.h"
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#include "tfilepath.h"
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#ifndef TNZCORE_LIGHT
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#include <qstring></qstring>
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#endif
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#ifdef _MSC_VER
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#pragma warning(disable : 4996)
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#endif
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#ifdef _WIN32
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#include "windows.h"
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#endif
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#include <sstream></sstream>
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std::wstring to_wstring(std::string s) {
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#ifdef TNZCORE_LIGHT
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  std::wstring ws;
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  ws.assign(s.begin(), s.end());
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  return ws;
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#else
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  QString testString = QString::fromStdString(s);
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  QString qString    = QString::fromUtf8(s.c_str());
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  // To detect if 's' is UTF-8 encoded or not
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  if (qString != testString && std::string(qString.toUtf8()) == s)
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    return qString.toStdWString();
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  else
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    return testString.toStdWString();
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#endif
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}
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std::string to_string(std::wstring ws) {
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#ifdef TNZCORE_LIGHT
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  std::string s;
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  s.assign(ws.begin(), ws.end());
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  return s;
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#else
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  QString const qString = QString::fromStdWString(ws);
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  // Test if 'ws' is not unicode (UTF-8)
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  if (qString.toLatin1() == qString) return qString.toStdString();
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  return std::string(qString.toUtf8());
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#endif
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}
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std::string to_string(const TFilePath& fp) {
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  return ::to_string(fp.getWideString());
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}
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/*!
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  The  default precision is six decimal places. If the
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  precision is less than of the decimal places in the fractonal
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  part, the remainder is not cut off but rounded.
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*/
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std::string to_string(double value, int prec) {
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  if (prec < 0) {
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    return std::to_string(value);
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  }
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  std::ostringstream out;
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  out.setf(std::ios_base::fixed, std::ios_base::floatfield);
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  out.precision(prec);
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  out << value;
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  return out.str();
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}
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std::string to_string(void* p) {
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  std::ostringstream out;
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  out << p;
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  return out.str();
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}
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bool isInt(std::string s) {
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  int i = 0, len = (int)s.size();
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  if (len == 0) return false;
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  if (s[0] == '-') {
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    if (len == 1)
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      return false;
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    else
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      i++;
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  }
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  while (i < len) {
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    if (s[i] < '0' || s[i] > '9') return false;
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    i++;
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  }
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  return true;
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}
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bool isDouble(std::string s) {
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  int i = 0, len = (int)s.size();
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  if (len == 0) return false;
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  if (i < len && s[i] == '-') i++;
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  while (i < len && s[i] != '.') {
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    if (s[i] < '0' || s[i] > '9') return false;
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    i++;
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  }
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  if (i >= len) return true;
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  i++;
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  while (i < len) {
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    if (s[i] < '0' || s[i] > '9') return false;
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    i++;
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  }
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  return true;
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}
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bool isInt(std::wstring s) { return isInt(::to_string(s)); }
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bool isDouble(std::wstring s) { return isDouble(::to_string(s)); }
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std::string toUpper(std::string a) {
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#ifdef _WIN32
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  size_t size      = a.size();
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  const char* cstr = a.c_str();
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  std::vector<char> buf(cstr, cstr + size + 1);</char>
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  return _strupr(&buf[0]);
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#else
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  std::string ret(a);
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  for (int i = 0; i < (int)ret.length(); i++) ret[i] = toupper(ret[i]);
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  return ret;
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#endif
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}
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std::string toLower(std::string a) {
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#ifdef _WIN32
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  size_t size      = a.size();
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  const char* cstr = a.c_str();
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  std::vector<char> buf(cstr, cstr + size + 1);</char>
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  return _strlwr(&buf[0]);
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#else
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  std::string ret(a);
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  for (int i = 0; i < (int)ret.length(); i++) ret[i] = tolower(ret[i]);
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  return ret;
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#endif
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}
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std::wstring toUpper(std::wstring a) {
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#ifdef _WIN32
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  size_t size         = a.size();
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  const wchar_t* cstr = a.c_str();
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  std::vector<wchar_t> buf(cstr, cstr + size + 1);</wchar_t>
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  return _wcsupr(&buf[0]);
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#else
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  std::wstring ret(a);
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  for (int i = 0; i < (int)ret.length(); i++) ret[i] = towupper(ret[i]);
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  return ret;
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#endif
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}
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std::wstring toLower(std::wstring a) {
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#ifdef _WIN32
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  size_t size         = a.size();
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  const wchar_t* cstr = a.c_str();
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  std::vector<wchar_t> buf(cstr, cstr + size + 1);</wchar_t>
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  return _wcslwr(&buf[0]);
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#else
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  std::wstring ret(a);
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  for (int i = 0; i < (int)ret.length(); i++) ret[i] = towlower(ret[i]);
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  return ret;
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#endif
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}