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e2e7c4d574
In a bunch of cases, this actually ends up simplifying the code as
to_number will handle something such as:
```
Optional<I> opt;
if constexpr (IsSigned<I>)
opt = view.to_int<I>();
else
opt = view.to_uint<I>();
```
For us.
The main goal here however is to have a single generic number conversion
API between all of the String classes.
94 lines
3.2 KiB
C++
94 lines
3.2 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* Copyright (c) 2021, networkException <networkexception@serenityos.org>
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* Copyright (c) 2022, Sam Atkins <atkinssj@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/ByteString.h>
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#include <AK/Forward.h>
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#include <AK/HashMap.h>
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#include <AK/OwnPtr.h>
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#include <AK/RefCounted.h>
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#include <AK/RefPtr.h>
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#include <AK/Vector.h>
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#include <LibCore/File.h>
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namespace Core {
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class ConfigFile : public RefCounted<ConfigFile> {
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public:
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enum class AllowWriting {
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Yes,
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No,
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};
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static ErrorOr<NonnullRefPtr<ConfigFile>> open_for_lib(ByteString const& lib_name, AllowWriting = AllowWriting::No);
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static ErrorOr<NonnullRefPtr<ConfigFile>> open_for_app(ByteString const& app_name, AllowWriting = AllowWriting::No);
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static ErrorOr<NonnullRefPtr<ConfigFile>> open_for_system(ByteString const& app_name, AllowWriting = AllowWriting::No);
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static ErrorOr<NonnullRefPtr<ConfigFile>> open(ByteString const& filename, AllowWriting = AllowWriting::No);
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static ErrorOr<NonnullRefPtr<ConfigFile>> open(ByteString const& filename, int fd);
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static ErrorOr<NonnullRefPtr<ConfigFile>> open(ByteString const& filename, NonnullOwnPtr<Core::File>);
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~ConfigFile();
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bool has_group(ByteString const&) const;
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bool has_key(ByteString const& group, ByteString const& key) const;
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Vector<ByteString> groups() const;
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Vector<ByteString> keys(ByteString const& group) const;
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size_t num_groups() const { return m_groups.size(); }
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ByteString read_entry(ByteString const& group, ByteString const& key, ByteString const& default_value = {}) const
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{
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return read_entry_optional(group, key).value_or(default_value);
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}
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Optional<ByteString> read_entry_optional(ByteString const& group, ByteString const& key) const;
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bool read_bool_entry(ByteString const& group, ByteString const& key, bool default_value = false) const;
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template<Integral T = int>
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T read_num_entry(ByteString const& group, ByteString const& key, T default_value = 0) const
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{
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if (!has_key(group, key))
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return default_value;
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return read_entry(group, key, "").to_number<T>().value_or(default_value);
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}
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void write_entry(ByteString const& group, ByteString const& key, ByteString const& value);
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void write_bool_entry(ByteString const& group, ByteString const& key, bool value);
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template<Integral T = int>
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void write_num_entry(ByteString const& group, ByteString const& key, T value)
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{
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write_entry(group, key, ByteString::number(value));
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}
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void dump() const;
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bool is_dirty() const { return m_dirty; }
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ErrorOr<void> sync();
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void add_group(ByteString const& group);
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void remove_group(ByteString const& group);
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void remove_entry(ByteString const& group, ByteString const& key);
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ByteString const& filename() const { return m_filename; }
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private:
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ConfigFile(ByteString const& filename, OwnPtr<InputBufferedFile> open_file);
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ErrorOr<void> reparse();
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ByteString m_filename;
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OwnPtr<InputBufferedFile> m_file;
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HashMap<ByteString, HashMap<ByteString, ByteString>> m_groups;
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bool m_dirty { false };
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};
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}
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