Function GetProgramFilesDir

src/yvalve/gds.cpp:4226–4258

We try to see if the registry has the information for the Program Files directory, that follows the boot partition and is localized.

// We try to see if the registry has the information for the Program Files
// directory, that follows the boot partition and is localized.
static bool GetProgramFilesDir(Firebird::PathName& output)
{
#ifdef WIN_NT
	const char* pdir = "SOFTWARE\\Microsoft\\Windows\\CurrentVersion";
	const char* pvalue = "ProgramFilesDir";

	HKEY hkey;
	LONG rc = RegOpenKeyEx(HKEY_LOCAL_MACHINE, pdir, 0, KEY_READ, &hkey);
	if (rc != ERROR_SUCCESS)
		return false;

	DWORD type, size = 0;
	rc = RegQueryValueEx(hkey, pvalue, NULL, &type, NULL, &size);
	if (rc != ERROR_SUCCESS || type != REG_SZ || !size)
	{
		RegCloseKey(hkey);
		return false;
	}

	output.reserve(size);
	BYTE* answer = reinterpret_cast<BYTE*>(output.begin());
	rc = RegQueryValueEx(hkey, pvalue, NULL, &type, answer, &size);
	RegCloseKey(hkey);
	if (rc != ERROR_SUCCESS)
		return false;

	output.recalculate_length();
	output += "\\Firebird\\";
	return true;
#else
	return false;
#endif
}


// Deprecated private API functions