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