/* Return false if this program has been started from "Program Files" directory
(which is an indicator that it has been installed) or from the last known
location of a SumatraPDF installation: */
bool IsRunningInPortableMode()
{
// cache the result so that it will be consistent during the lifetime of the process
static int sCacheIsPortable = -1; // -1 == uninitialized, 0 == installed, 1 == portable
if (sCacheIsPortable != -1)
return sCacheIsPortable != 0;
sCacheIsPortable = 1;
if (HasBeenInstalled()) {
sCacheIsPortable = 0;
return false;
}
ScopedMem<WCHAR> exePath(GetExePath());
ScopedMem<WCHAR> programFilesDir(GetSpecialFolder(CSIDL_PROGRAM_FILES));
// if we can't get a path, assume we're not running from "Program Files"
if (!exePath || !programFilesDir)
return true;
// check if one of the exePath's parent directories is "Program Files"
// (or a junction to it)
WCHAR *baseName;
while ((baseName = (WCHAR*)path::GetBaseName(exePath)) > exePath) {
baseName[-1] = '\0';
if (path::IsSame(programFilesDir, exePath)) {
sCacheIsPortable = 0;
return false;
}
}
return true;
}
bool IsRunningInPortableMode()
{
// cache the result so that it will be consistent during the lifetime of the process
static int sCacheIsPortable = -1; // -1 == uninitialized, 0 == installed, 1 == portable
if (sCacheIsPortable != -1)
return sCacheIsPortable != 0;
sCacheIsPortable = 1;
ScopedMem<WCHAR> exePath(GetExePath());
if (!exePath)
return true;
// if we can't get a path, assume we're not running from "Program Files"
ScopedMem<WCHAR> installedPath;
// cf. GetInstallationDir() in installer\Installer.cpp
installedPath.Set(ReadRegStr(HKEY_CURRENT_USER, REG_PATH_UNINST, L"InstallLocation"));
if (!installedPath)
installedPath.Set(ReadRegStr(HKEY_LOCAL_MACHINE, REG_PATH_UNINST, L"InstallLocation"));
if (installedPath) {
if (!str::EndsWithI(installedPath.Get(), L".exe"))
installedPath.Set(path::Join(installedPath.Get(), path::GetBaseName(exePath)));
if (path::IsSame(installedPath, exePath)) {
sCacheIsPortable = 0;
return false;
}
}
ScopedMem<WCHAR> programFilesDir(GetSpecialFolder(CSIDL_PROGRAM_FILES));
if (!programFilesDir)
return true;
// check if one of the exePath's parent directories is "Program Files"
// (or a junction to it)
WCHAR *baseName;
while ((baseName = (WCHAR*)path::GetBaseName(exePath)) > exePath) {
baseName[-1] = '\0';
if (path::IsSame(programFilesDir, exePath)) {
sCacheIsPortable = 0;
return false;
}
}
return true;
}
