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/*
* Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/ByteBuffer.h>
#include <AK/Format.h>
#include <AK/Forward.h>
#include <AK/StringView.h>
#include <stdarg.h>
namespace AK {
class StringBuilder {
public:
using OutputType = String;
explicit StringBuilder(size_t initial_capacity = inline_capacity);
~StringBuilder() = default;
ErrorOr<void> try_append(StringView);
#ifndef KERNEL
ErrorOr<void> try_append(Utf16View const&);
#endif
ErrorOr<void> try_append(Utf32View const&);
ErrorOr<void> try_append_code_point(u32);
ErrorOr<void> try_append(char);
template<typename... Parameters>
ErrorOr<void> try_appendff(CheckedFormatString<Parameters...>&& fmtstr, Parameters const&... parameters)
{
VariadicFormatParams variadic_format_params { parameters... };
return vformat(*this, fmtstr.view(), variadic_format_params);
}
ErrorOr<void> try_append(char const*, size_t);
ErrorOr<void> try_append_escaped_for_json(StringView);
void append(StringView);
#ifndef KERNEL
void append(Utf16View const&);
#endif
void append(Utf32View const&);
void append(char);
void append_code_point(u32);
void append(char const*, size_t);
void appendvf(char const*, va_list);
void append_as_lowercase(char);
void append_escaped_for_json(StringView);
template<typename... Parameters>
void appendff(CheckedFormatString<Parameters...>&& fmtstr, Parameters const&... parameters)
{
VariadicFormatParams variadic_format_params { parameters... };
MUST(vformat(*this, fmtstr.view(), variadic_format_params));
}
#ifndef KERNEL
[[nodiscard]] String build() const;
[[nodiscard]] String to_string() const;
#endif
[[nodiscard]] ByteBuffer to_byte_buffer() const;
[[nodiscard]] StringView string_view() const;
void clear();
[[nodiscard]] size_t length() const { return m_buffer.size(); }
[[nodiscard]] bool is_empty() const { return m_buffer.is_empty(); }
void trim(size_t count) { m_buffer.resize(m_buffer.size() - count); }
template<class SeparatorType, class CollectionType>
void join(SeparatorType const& separator, CollectionType const& collection, StringView fmtstr = "{}"sv)
{
bool first = true;
for (auto& item : collection) {
if (first)
first = false;
else
append(separator);
appendff(fmtstr, item);
}
}
private:
ErrorOr<void> will_append(size_t);
u8* data() { return m_buffer.data(); }
u8 const* data() const { return m_buffer.data(); }
static constexpr size_t inline_capacity = 256;
AK::Detail::ByteBuffer<inline_capacity> m_buffer;
};
}
using AK::StringBuilder;
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