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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "MsiDatabase.h"
#ifdef UNICODE
# define MSIDBOPEN_READONLY_W MSIDBOPEN_READONLY
# define INSTALLPROPERTY_LOCALPACKAGE_W INSTALLPROPERTY_LOCALPACKAGE
#else
// MSIDBOPEN_READONLY is defined as `(LPCTSTR)0` in msiquery.h, so we need to
// cast it to LPCWSTR.
# define MSIDBOPEN_READONLY_W reinterpret_cast<LPCWSTR>(MSIDBOPEN_READONLY)
// INSTALLPROPERTY_LOCALPACKAGE is defined as `__TEXT("LocalPackage")` in msi.h,
// so we need to define a wchar_t version.
# define INSTALLPROPERTY_LOCALPACKAGE_W L"LocalPackage"
#endif // UNICODE
namespace mozilla {
/*static*/
UniquePtr<wchar_t[]> MsiDatabase::GetRecordString(MSIHANDLE aRecord,
UINT aFieldIndex) {
// The 3rd parameter of MsiRecordGetStringW must not be nullptr.
wchar_t kEmptyString[] = L"";
DWORD len = 0;
UINT ret = ::MsiRecordGetStringW(aRecord, aFieldIndex, kEmptyString, &len);
if (ret != ERROR_MORE_DATA) {
return nullptr;
}
// |len| returned from MsiRecordGetStringW does not include
// a null-character, but a length to pass to MsiRecordGetStringW
// needs to include a null-character.
++len;
auto buf = MakeUnique<wchar_t[]>(len);
ret = ::MsiRecordGetStringW(aRecord, aFieldIndex, buf.get(), &len);
if (ret != ERROR_SUCCESS) {
return nullptr;
}
return buf;
}
MsiDatabase::MsiDatabase(const wchar_t* aDatabasePath) {
MSIHANDLE handle = 0;
UINT ret = ::MsiOpenDatabaseW(aDatabasePath, MSIDBOPEN_READONLY_W, &handle);
if (ret != ERROR_SUCCESS) {
return;
}
mDatabase.own(handle);
}
Maybe<MsiDatabase> MsiDatabase::FromProductId(const wchar_t* aProductId) {
DWORD len = MAX_PATH;
wchar_t bufStack[MAX_PATH];
UINT ret = ::MsiGetProductInfoW(aProductId, INSTALLPROPERTY_LOCALPACKAGE_W,
bufStack, &len);
if (ret == ERROR_SUCCESS) {
return Some(MsiDatabase(bufStack));
}
if (ret != ERROR_MORE_DATA) {
return Nothing();
}
// |len| returned from MsiGetProductInfoW does not include
// a null-character, but a length to pass to MsiGetProductInfoW
// needs to include a null-character.
++len;
std::unique_ptr<wchar_t[]> bufHeap(new wchar_t[len]);
ret = ::MsiGetProductInfoW(aProductId, INSTALLPROPERTY_LOCALPACKAGE_W,
bufHeap.get(), &len);
if (ret == ERROR_SUCCESS) {
return Some(MsiDatabase(bufHeap.get()));
}
return Nothing();
}
MsiDatabase::operator bool() const { return !!mDatabase; }
} // namespace mozilla
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