103 lines
3.1 KiB
C++
103 lines
3.1 KiB
C++
/*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* Copyright 2015 Danny Robson <danny@nerdcruft.net>
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*/
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#include "registry.hpp"
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#include "../debug.hpp"
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#include "../except.hpp"
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#include <string>
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#include <cstdint>
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using util::win32::key;
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///////////////////////////////////////////////////////////////////////////////
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typedef uint64_t QWORD;
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//-----------------------------------------------------------------------------
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template <typename T> constexpr DWORD type_to_id (void);
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template <> constexpr DWORD type_to_id<DWORD> (void) { return REG_DWORD; }
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template <> constexpr DWORD type_to_id<QWORD> (void) { return REG_QWORD; }
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template <> constexpr DWORD type_to_id<void> (void) { return REG_NONE; }
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template <> constexpr DWORD type_to_id<std::string> (void) { return REG_SZ; }
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//-----------------------------------------------------------------------------
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template <typename T> constexpr DWORD restrict_to_id (void);
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template <> constexpr DWORD restrict_to_id<DWORD> (void) { return RRF_RT_DWORD; }
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template <> constexpr DWORD restrict_to_id<QWORD> (void) { return RRF_RT_QWORD; }
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template <> constexpr DWORD restrict_to_id<void> (void) { return RRF_RT_REG_NONE; }
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template <> constexpr DWORD restrict_to_id<std::string> (void) { return RRF_RT_REG_SZ; }
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///////////////////////////////////////////////////////////////////////////////
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key::key (HKEY root, const char *child, REGSAM rights)
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{
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auto err = RegOpenKeyEx (root, child, 0, rights, &m_handle);
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win32_error::try_code (err);
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}
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//-----------------------------------------------------------------------------
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key::~key ()
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{
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auto err = RegCloseKey (m_handle);
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win32_error::try_code (err);
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}
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///////////////////////////////////////////////////////////////////////////////
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template <typename T>
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T
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key::data (const char *name) const
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{
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T value;
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DWORD type;
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DWORD size = sizeof (value);
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auto err = RegGetValue (m_handle, name, &value, restrict_to_id<T> (), nullptr, &value, &size);
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win32_error::try_code (err);
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return value;
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}
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//-----------------------------------------------------------------------------
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std::set<std::string>
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key::values (void) const
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{
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std::set<std::string> all;
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for (DWORD i = 0; ; ++i) {
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std::string name (255, '\0');
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DWORD size = name.size ();
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auto err = RegEnumValue (m_handle, i, &name[0], &size, nullptr, nullptr, nullptr, nullptr);
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if (ERROR_NO_MORE_ITEMS == err)
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return all;
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if (ERROR_SUCCESS != err)
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win32_error::throw_code (err);
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CHECK_GT (size, 0);
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name.resize (size - 1);
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all.insert (std::move (name));
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}
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}
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