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// Copyright 2019 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/win/hstring_compare.h"
#include <winstring.h>
#include "base/native_library.h"
#include "base/win/windows_version.h"
namespace base {
namespace win {
HRESULT HStringCompare(HSTRING string1, HSTRING string2, INT32* result) {
using CompareStringFunc = decltype(&::WindowsCompareStringOrdinal);
static const auto compare_string_func = []() -> CompareStringFunc {
if (GetVersion() < Version::WIN8)
return nullptr;
NativeLibraryLoadError load_error;
NativeLibrary combase_module =
PinSystemLibrary(FILE_PATH_LITERAL("combase.dll"), &load_error);
if (load_error.code)
return nullptr;
return reinterpret_cast<CompareStringFunc>(
GetFunctionPointerFromNativeLibrary(combase_module,
"WindowsCompareStringOrdinal"));
}();
if (!compare_string_func)
return E_FAIL;
return compare_string_func(string1, string2, result);
}
} // namespace win
} // namespace base
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