/*
* libjingle
* Copyright 2004--2005, Google Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*/
#include "talk/base/win32.h"
#include <algorithm>
#include "talk/base/basictypes.h"
#include "talk/base/common.h"
namespace talk_base {
//
// Unix time is in seconds relative to 1/1/1970. So we compute the windows
// FILETIME of that time/date, then we add/subtract in appropriate units to
// convert to/from unix time.
// The units of FILETIME are 100ns intervals, so by multiplying by or dividing
// by 10000000, we can convert to/from seconds.
//
// FileTime = UnixTime*10000000 + FileTime(1970)
// UnixTime = (FileTime-FileTime(1970))/10000000
//
void FileTimeToUnixTime(const FILETIME& ft, time_t* ut) {
ASSERT(NULL != ut);
// FILETIME has an earlier date base than time_t (1/1/1970), so subtract off
// the difference.
SYSTEMTIME base_st;
memset(&base_st, 0, sizeof(base_st));
base_st.wDay = 1;
base_st.wMonth = 1;
base_st.wYear = 1970;
FILETIME base_ft;
SystemTimeToFileTime(&base_st, &base_ft);
ULARGE_INTEGER base_ul, current_ul;
memcpy(&base_ul, &base_ft, sizeof(FILETIME));
memcpy(¤t_ul, &ft, sizeof(FILETIME));
// Divide by big number to convert to seconds, then subtract out the 1970
// base date value.
const ULONGLONG RATIO = 10000000;
*ut = static_cast<time_t>((current_ul.QuadPart - base_ul.QuadPart) / RATIO);
}
void UnixTimeToFileTime(const time_t& ut, FILETIME* ft) {
ASSERT(NULL != ft);
// FILETIME has an earlier date base than time_t (1/1/1970), so add in
// the difference.
SYSTEMTIME base_st;
memset(&base_st, 0, sizeof(base_st));
base_st.wDay = 1;
base_st.wMonth = 1;
base_st.wYear = 1970;
FILETIME base_ft;
SystemTimeToFileTime(&base_st, &base_ft);
ULARGE_INTEGER base_ul;
memcpy(&base_ul, &base_ft, sizeof(FILETIME));
// Multiply by big number to convert to 100ns units, then add in the 1970
// base date value.
const ULONGLONG RATIO = 10000000;
ULARGE_INTEGER current_ul;
current_ul.QuadPart = base_ul.QuadPart + static_cast<int64>(ut) * RATIO;
memcpy(ft, ¤t_ul, sizeof(FILETIME));
}
bool Utf8ToWindowsFilename(const std::string& utf8, std::wstring* filename) {
// TODO: Integrate into fileutils.h
// TODO: Handle wide and non-wide cases via TCHAR?
// TODO: Skip \\?\ processing if the length is not > MAX_PATH?
// TODO: Write unittests
// Convert to Utf16
int wlen = ::MultiByteToWideChar(CP_UTF8, 0, utf8.c_str(), utf8.length() + 1,
NULL, 0);
if (0 == wlen) {
return false;
}
wchar_t* wfilename = STACK_ARRAY(wchar_t, wlen);
if (0 == ::MultiByteToWideChar(CP_UTF8, 0, utf8.c_str(), utf8.length() + 1,
wfilename, wlen)) {
return false;
}
// Replace forward slashes with backslashes
std::replace(wfilename, wfilename + wlen, L'/', L'\\');
// Convert to complete filename
DWORD full_len = ::GetFullPathName(wfilename, 0, NULL, NULL);
if (0 == full_len) {
return false;
}
wchar_t* filepart = NULL;
wchar_t* full_filename = STACK_ARRAY(wchar_t, full_len + 6);
wchar_t* start = full_filename + 6;
if (0 == ::GetFullPathName(wfilename, full_len, start, &filepart)) {
return false;
}
// Add long-path prefix
const wchar_t kLongPathPrefix[] = L"\\\\?\\UNC";
if ((start[0] != L'\\') || (start[1] != L'\\')) {
// Non-unc path: <pathname>
// Becomes: \\?\<pathname>
start -= 4;
ASSERT(start >= full_filename);
memcpy(start, kLongPathPrefix, 4 * sizeof(wchar_t));
} else if (start[2] != L'?') {
// Unc path: \\<server>\<pathname>
// Becomes: \\?\UNC\<server>\<pathname>
start -= 6;
ASSERT(start >= full_filename);
memcpy(start, kLongPathPrefix, 7 * sizeof(wchar_t));
} else {
// Already in long-path form.
}
filename->assign(start);
return true;
}
bool GetOsVersion(int* major, int* minor, int* build) {
OSVERSIONINFO info = {0};
info.dwOSVersionInfoSize = sizeof(info);
if (GetVersionEx(&info)) {
if (major) *major = info.dwMajorVersion;
if (minor) *minor = info.dwMinorVersion;
if (build) *build = info.dwBuildNumber;
return true;
}
return false;
}
bool GetCurrentProcessIntegrityLevel(int* level) {
bool ret = false;
HANDLE process = GetCurrentProcess(), token;
if (OpenProcessToken(process, TOKEN_QUERY | TOKEN_QUERY_SOURCE, &token)) {
DWORD size;
if (!GetTokenInformation(token, TokenIntegrityLevel, NULL, 0, &size) &&
GetLastError() == ERROR_INSUFFICIENT_BUFFER) {
char* buf = STACK_ARRAY(char, size);
TOKEN_MANDATORY_LABEL* til =
reinterpret_cast<TOKEN_MANDATORY_LABEL*>(buf);
if (GetTokenInformation(token, TokenIntegrityLevel, til, size, &size)) {
DWORD count = *GetSidSubAuthorityCount(til->Label.Sid);
*level = *GetSidSubAuthority(til->Label.Sid, count - 1);
ret = true;
}
}
CloseHandle(token);
}
return ret;
}
} // namespace talk_base