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https://github.com/SerenityOS/serenity
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b2fd51f561
To ensure this happens without duplicating code, we allow forcing a StringBuilder object to only use the inline buffer, so the code in the AK/Format.cpp file doesn't need to deal with different underlying storage types (expandable or inline-fixed) at all.
121 lines
3.5 KiB
C++
121 lines
3.5 KiB
C++
/*
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* Copyright (c) 2018-2021, Andreas Kling <kling@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/ByteBuffer.h>
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#include <AK/Format.h>
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#include <AK/Forward.h>
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#include <AK/StringView.h>
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#include <stdarg.h>
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namespace AK {
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class StringBuilder {
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public:
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static constexpr size_t inline_capacity = 256;
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using OutputType = DeprecatedString;
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static ErrorOr<StringBuilder> create(size_t initial_capacity = inline_capacity);
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explicit StringBuilder(size_t initial_capacity = inline_capacity);
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enum class UseInlineCapacityOnly {
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Yes,
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No,
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};
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explicit StringBuilder(UseInlineCapacityOnly use_inline_capacity_only);
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~StringBuilder() = default;
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ErrorOr<void> try_append(StringView);
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#ifndef KERNEL
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ErrorOr<void> try_append(Utf16View const&);
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#endif
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ErrorOr<void> try_append(Utf32View const&);
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ErrorOr<void> try_append_code_point(u32);
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ErrorOr<void> try_append(char);
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template<typename... Parameters>
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ErrorOr<void> try_appendff(CheckedFormatString<Parameters...>&& fmtstr, Parameters const&... parameters)
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{
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VariadicFormatParams<AllowDebugOnlyFormatters::No, Parameters...> variadic_format_params { parameters... };
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return vformat(*this, fmtstr.view(), variadic_format_params);
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}
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ErrorOr<void> try_append(char const*, size_t);
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ErrorOr<void> try_append_repeated(char, size_t);
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ErrorOr<void> try_append_escaped_for_json(StringView);
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void append(StringView);
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#ifndef KERNEL
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void append(Utf16View const&);
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#endif
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void append(Utf32View const&);
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void append(char);
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void append_code_point(u32);
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void append(char const*, size_t);
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void appendvf(char const*, va_list);
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void append_repeated(char, size_t);
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void append_as_lowercase(char);
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void append_escaped_for_json(StringView);
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template<typename... Parameters>
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void appendff(CheckedFormatString<Parameters...>&& fmtstr, Parameters const&... parameters)
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{
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VariadicFormatParams<AllowDebugOnlyFormatters::No, Parameters...> variadic_format_params { parameters... };
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MUST(vformat(*this, fmtstr.view(), variadic_format_params));
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}
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#ifndef KERNEL
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[[nodiscard]] DeprecatedString to_deprecated_string() const;
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#endif
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ErrorOr<String> to_string() const;
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ErrorOr<FlyString> to_fly_string() const;
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[[nodiscard]] ErrorOr<ByteBuffer> to_byte_buffer() const;
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[[nodiscard]] StringView string_view() const;
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void clear();
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[[nodiscard]] size_t length() const;
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[[nodiscard]] bool is_empty() const;
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void trim(size_t count);
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template<class SeparatorType, class CollectionType>
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void join(SeparatorType const& separator, CollectionType const& collection, StringView fmtstr = "{}"sv)
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{
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MUST(try_join(separator, collection, fmtstr));
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}
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template<class SeparatorType, class CollectionType>
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ErrorOr<void> try_join(SeparatorType const& separator, CollectionType const& collection, StringView fmtstr = "{}"sv)
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{
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bool first = true;
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for (auto& item : collection) {
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if (!first)
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TRY(try_append(separator));
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TRY(try_appendff(fmtstr, item));
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first = false;
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}
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return {};
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}
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private:
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ErrorOr<void> will_append(size_t);
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u8* data();
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u8 const* data() const;
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UseInlineCapacityOnly m_use_inline_capacity_only { UseInlineCapacityOnly::No };
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Detail::ByteBuffer<inline_capacity> m_buffer;
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};
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}
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#if USING_AK_GLOBALLY
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using AK::StringBuilder;
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#endif
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