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AK: Implement string formatting for FixedStringBuffers

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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.
This commit is contained in:
Liav A 2023-08-12 00:38:01 +03:00 • committed by Andrew Kaster
parent b096f39e92
commit b2fd51f561
3 changed files with 76 additions and 6 deletions
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19
AK/FixedStringBuffer.h
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@ -7,6 +7,7 @@
#pragma once
#include <AK/Array.h>
#include <AK/StringBuilder.h>
#include <AK/StringView.h>
#include <AK/TypedTransfer.h>
#include <AK/Userspace.h>
@ -22,6 +23,24 @@ namespace AK {
template<size_t Size>
class FixedStringBuffer {
public:
[[nodiscard]] static ErrorOr<FixedStringBuffer<Size>> vformatted(StringView fmtstr, AK::TypeErasedFormatParams& params)
requires(Size < StringBuilder::inline_capacity)
{
StringBuilder builder { StringBuilder::UseInlineCapacityOnly::Yes };
TRY(AK::vformat(builder, fmtstr, params));
FixedStringBuffer<Size> buffer {};
buffer.store_characters(builder.string_view());
return buffer;
}
template<typename... Parameters>
[[nodiscard]] static ErrorOr<FixedStringBuffer<Size>> formatted(CheckedFormatString<Parameters...>&& fmtstr, Parameters const&... parameters)
requires(Size < StringBuilder::inline_capacity)
{
AK::VariadicFormatParams<AK::AllowDebugOnlyFormatters::No, Parameters...> variadic_format_parameters { parameters... };
return vformatted(fmtstr.view(), variadic_format_parameters);
}
void store_characters(StringView characters)
{
// NOTE: Only store the characters up to the first null terminator