mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-11-26 09:30:24 +00:00
20743e8aed
As we removed the support of VBE modesetting that was done by GRUB early on boot, we need to determine if we can modeset the resolution with our drivers, and if not, we should enable text mode and ensure that SystemServer knows about it too. Also, SystemServer should first check if there's a framebuffer device node, which is an indication that text mode was not even if it was requested. Then, if it doesn't find it, it should check what boot_mode argument the user specified (in case it's self-test). This way if we try to use bochs-display device (which is not VGA compatible) and request a text mode, it will not honor the request and will continue with graphical mode. Also try to print critical messages with mininum memory allocations possible. In LibVT, We make the implementation flexible for kernel-specific methods that are implemented in ConsoleImpl class.
525 lines
14 KiB
C++
525 lines
14 KiB
C++
/*
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* Copyright (c) 2020, the SerenityOS developers.
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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/CheckedFormatString.h>
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#include <AK/AllOf.h>
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#include <AK/AnyOf.h>
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#include <AK/Array.h>
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#include <AK/GenericLexer.h>
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#include <AK/Optional.h>
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#include <AK/StringView.h>
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#ifndef KERNEL
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# include <stdio.h>
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#endif
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namespace AK {
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class TypeErasedFormatParams;
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class FormatParser;
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class FormatBuilder;
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template<typename T, typename = void>
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struct Formatter {
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using __no_formatter_defined = void;
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};
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constexpr size_t max_format_arguments = 256;
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struct TypeErasedParameter {
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enum class Type {
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UInt8,
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UInt16,
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UInt32,
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UInt64,
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Int8,
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Int16,
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Int32,
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Int64,
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Custom
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};
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template<size_t size, bool is_unsigned>
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static consteval Type get_type_from_size()
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{
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if constexpr (is_unsigned) {
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if constexpr (size == 1)
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return Type::UInt8;
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if constexpr (size == 2)
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return Type::UInt16;
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if constexpr (size == 4)
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return Type::UInt32;
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if constexpr (size == 8)
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return Type::UInt64;
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} else {
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if constexpr (size == 1)
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return Type::Int8;
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if constexpr (size == 2)
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return Type::Int16;
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if constexpr (size == 4)
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return Type::Int32;
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if constexpr (size == 8)
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return Type::Int64;
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}
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VERIFY_NOT_REACHED();
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}
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template<typename T>
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static consteval Type get_type()
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{
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if constexpr (IsIntegral<T>)
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return get_type_from_size<sizeof(T), IsUnsigned<T>>();
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else
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return Type::Custom;
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}
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constexpr size_t to_size() const
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{
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i64 svalue;
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if (type == TypeErasedParameter::Type::UInt8)
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svalue = *static_cast<const u8*>(value);
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else if (type == TypeErasedParameter::Type::UInt16)
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svalue = *static_cast<const u16*>(value);
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else if (type == TypeErasedParameter::Type::UInt32)
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svalue = *static_cast<const u32*>(value);
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else if (type == TypeErasedParameter::Type::UInt64)
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svalue = *static_cast<const u64*>(value);
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else if (type == TypeErasedParameter::Type::Int8)
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svalue = *static_cast<const i8*>(value);
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else if (type == TypeErasedParameter::Type::Int16)
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svalue = *static_cast<const i16*>(value);
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else if (type == TypeErasedParameter::Type::Int32)
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svalue = *static_cast<const i32*>(value);
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else if (type == TypeErasedParameter::Type::Int64)
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svalue = *static_cast<const i64*>(value);
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else
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VERIFY_NOT_REACHED();
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VERIFY(svalue >= 0);
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return static_cast<size_t>(svalue);
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}
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// FIXME: Getters and setters.
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const void* value;
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Type type;
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void (*formatter)(TypeErasedFormatParams&, FormatBuilder&, FormatParser&, const void* value);
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};
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class FormatParser : public GenericLexer {
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public:
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struct FormatSpecifier {
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StringView flags;
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size_t index;
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};
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explicit FormatParser(StringView input);
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StringView consume_literal();
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bool consume_number(size_t& value);
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bool consume_specifier(FormatSpecifier& specifier);
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bool consume_replacement_field(size_t& index);
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};
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class FormatBuilder {
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public:
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enum class Align {
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Default,
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Left,
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Center,
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Right,
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};
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enum class SignMode {
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OnlyIfNeeded,
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Always,
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Reserved,
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Default = OnlyIfNeeded,
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};
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explicit FormatBuilder(StringBuilder& builder)
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: m_builder(builder)
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{
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}
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void put_padding(char fill, size_t amount);
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void put_literal(StringView value);
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void put_string(
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StringView value,
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Align align = Align::Left,
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size_t min_width = 0,
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size_t max_width = NumericLimits<size_t>::max(),
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char fill = ' ');
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void put_u64(
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u64 value,
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u8 base = 10,
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bool prefix = false,
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bool upper_case = false,
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bool zero_pad = false,
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Align align = Align::Right,
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size_t min_width = 0,
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char fill = ' ',
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SignMode sign_mode = SignMode::OnlyIfNeeded,
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bool is_negative = false);
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void put_i64(
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i64 value,
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u8 base = 10,
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bool prefix = false,
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bool upper_case = false,
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bool zero_pad = false,
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Align align = Align::Right,
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size_t min_width = 0,
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char fill = ' ',
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SignMode sign_mode = SignMode::OnlyIfNeeded);
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#ifndef KERNEL
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void put_f64(
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double value,
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u8 base = 10,
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bool upper_case = false,
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Align align = Align::Right,
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size_t min_width = 0,
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size_t precision = 6,
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char fill = ' ',
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SignMode sign_mode = SignMode::OnlyIfNeeded);
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#endif
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const StringBuilder& builder() const
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{
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return m_builder;
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}
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StringBuilder& builder() { return m_builder; }
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private:
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StringBuilder& m_builder;
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};
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class TypeErasedFormatParams {
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public:
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Span<const TypeErasedParameter> parameters() const { return m_parameters; }
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void set_parameters(Span<const TypeErasedParameter> parameters) { m_parameters = parameters; }
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size_t take_next_index() { return m_next_index++; }
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private:
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Span<const TypeErasedParameter> m_parameters;
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size_t m_next_index { 0 };
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};
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template<typename T>
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void __format_value(TypeErasedFormatParams& params, FormatBuilder& builder, FormatParser& parser, const void* value)
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{
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Formatter<T> formatter;
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formatter.parse(params, parser);
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formatter.format(builder, *static_cast<const T*>(value));
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}
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template<typename... Parameters>
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class VariadicFormatParams : public TypeErasedFormatParams {
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public:
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static_assert(sizeof...(Parameters) <= max_format_arguments);
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explicit VariadicFormatParams(const Parameters&... parameters)
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: m_data({ TypeErasedParameter { ¶meters, TypeErasedParameter::get_type<Parameters>(), __format_value<Parameters> }... })
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{
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this->set_parameters(m_data);
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}
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private:
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Array<TypeErasedParameter, sizeof...(Parameters)> m_data;
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};
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// We use the same format for most types for consistency. This is taken directly from
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// std::format. One difference is that we are not counting the width or sign towards the
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// total width when calculating zero padding for numbers.
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// https://en.cppreference.com/w/cpp/utility/format/formatter#Standard_format_specification
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struct StandardFormatter {
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enum class Mode {
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Default,
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Binary,
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BinaryUppercase,
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Decimal,
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Octal,
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Hexadecimal,
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HexadecimalUppercase,
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Character,
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String,
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Pointer,
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Float,
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Hexfloat,
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HexfloatUppercase,
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};
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FormatBuilder::Align m_align = FormatBuilder::Align::Default;
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FormatBuilder::SignMode m_sign_mode = FormatBuilder::SignMode::OnlyIfNeeded;
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Mode m_mode = Mode::Default;
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bool m_alternative_form = false;
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char m_fill = ' ';
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bool m_zero_pad = false;
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Optional<size_t> m_width;
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Optional<size_t> m_precision;
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void parse(TypeErasedFormatParams&, FormatParser&);
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};
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template<typename T>
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struct Formatter<T, typename EnableIf<IsIntegral<T>>::Type> : StandardFormatter {
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Formatter() = default;
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explicit Formatter(StandardFormatter formatter)
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: StandardFormatter(formatter)
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{
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}
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void format(FormatBuilder&, T value);
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};
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template<>
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struct Formatter<StringView> : StandardFormatter {
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Formatter() = default;
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explicit Formatter(StandardFormatter formatter)
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: StandardFormatter(formatter)
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{
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}
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void format(FormatBuilder&, StringView value);
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};
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template<>
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struct Formatter<const char*> : Formatter<StringView> {
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void format(FormatBuilder& builder, const char* value)
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{
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if (m_mode == Mode::Pointer) {
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Formatter<FlatPtr> formatter { *this };
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formatter.format(builder, reinterpret_cast<FlatPtr>(value));
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} else {
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Formatter<StringView>::format(builder, value);
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}
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}
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};
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template<>
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struct Formatter<char*> : Formatter<const char*> {
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};
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template<size_t Size>
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struct Formatter<char[Size]> : Formatter<const char*> {
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};
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template<>
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struct Formatter<String> : Formatter<StringView> {
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};
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template<>
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struct Formatter<FlyString> : Formatter<StringView> {
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};
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template<typename T>
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struct Formatter<T*> : StandardFormatter {
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void format(FormatBuilder& builder, T* value)
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{
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if (m_mode == Mode::Default)
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m_mode = Mode::Pointer;
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Formatter<FlatPtr> formatter { *this };
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formatter.format(builder, reinterpret_cast<FlatPtr>(value));
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}
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};
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template<>
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struct Formatter<char> : StandardFormatter {
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void format(FormatBuilder&, char value);
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};
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template<>
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struct Formatter<bool> : StandardFormatter {
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void format(FormatBuilder&, bool value);
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};
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#ifndef KERNEL
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template<>
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struct Formatter<float> : StandardFormatter {
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void format(FormatBuilder&, float value);
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};
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template<>
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struct Formatter<double> : StandardFormatter {
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Formatter() = default;
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explicit Formatter(StandardFormatter formatter)
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: StandardFormatter(formatter)
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{
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}
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void format(FormatBuilder&, double value);
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};
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#endif
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template<>
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struct Formatter<std::nullptr_t> : Formatter<FlatPtr> {
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void format(FormatBuilder& builder, std::nullptr_t)
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{
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if (m_mode == Mode::Default)
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m_mode = Mode::Pointer;
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return Formatter<FlatPtr>::format(builder, 0);
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}
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};
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void vformat(StringBuilder&, StringView fmtstr, TypeErasedFormatParams);
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#ifndef KERNEL
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void vout(FILE*, StringView fmtstr, TypeErasedFormatParams, bool newline = false);
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template<typename... Parameters>
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void out(FILE* file, CheckedFormatString<Parameters...>&& fmtstr, const Parameters&... parameters) { vout(file, fmtstr.view(), VariadicFormatParams { parameters... }); }
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template<typename... Parameters>
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void outln(FILE* file, CheckedFormatString<Parameters...>&& fmtstr, const Parameters&... parameters) { vout(file, fmtstr.view(), VariadicFormatParams { parameters... }, true); }
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inline void outln(FILE* file) { fputc('\n', file); }
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template<typename... Parameters>
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void out(CheckedFormatString<Parameters...>&& fmtstr, const Parameters&... parameters) { out(stdout, move(fmtstr), parameters...); }
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template<typename... Parameters>
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void outln(CheckedFormatString<Parameters...>&& fmtstr, const Parameters&... parameters) { outln(stdout, move(fmtstr), parameters...); }
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inline void outln() { outln(stdout); }
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# define outln_if(flag, fmt, ...) \
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do { \
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if constexpr (flag) \
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outln(fmt, ##__VA_ARGS__); \
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} while (0)
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template<typename... Parameters>
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void warn(CheckedFormatString<Parameters...>&& fmtstr, const Parameters&... parameters)
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{
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out(stderr, move(fmtstr), parameters...);
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}
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template<typename... Parameters>
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void warnln(CheckedFormatString<Parameters...>&& fmtstr, const Parameters&... parameters) { outln(stderr, move(fmtstr), parameters...); }
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inline void warnln() { outln(stderr); }
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# define warnln_if(flag, fmt, ...) \
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do { \
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if constexpr (flag) \
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outln(fmt, ##__VA_ARGS__); \
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} while (0)
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#endif
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void vdbgln(StringView fmtstr, TypeErasedFormatParams);
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template<typename... Parameters>
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void dbgln(CheckedFormatString<Parameters...>&& fmtstr, const Parameters&... parameters)
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{
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vdbgln(fmtstr.view(), VariadicFormatParams { parameters... });
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}
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inline void dbgln() { dbgln(""); }
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void set_debug_enabled(bool);
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#ifdef KERNEL
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void vdmesgln(StringView fmtstr, TypeErasedFormatParams);
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template<typename... Parameters>
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void dmesgln(CheckedFormatString<Parameters...>&& fmt, const Parameters&... parameters)
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{
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vdmesgln(fmt.view(), VariadicFormatParams { parameters... });
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}
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void v_critical_dmesgln(StringView fmtstr, TypeErasedFormatParams);
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// be very careful to not cause any allocations here, since we could be in
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// a very unstable situation
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template<typename... Parameters>
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void critical_dmesgln(CheckedFormatString<Parameters...>&& fmt, const Parameters&... parameters)
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{
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v_critical_dmesgln(fmt.view(), VariadicFormatParams { parameters... });
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}
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#endif
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template<typename T, typename = void>
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inline constexpr bool HasFormatter = true;
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template<typename T>
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inline constexpr bool HasFormatter<T, typename Formatter<T>::__no_formatter_defined> = false;
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template<typename T>
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class FormatIfSupported {
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public:
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explicit FormatIfSupported(const T& value)
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: m_value(value)
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{
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}
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const T& value() const { return m_value; }
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private:
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const T& m_value;
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};
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template<typename T, bool Supported = false>
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struct __FormatIfSupported : Formatter<StringView> {
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void format(FormatBuilder& builder, const FormatIfSupported<T>&)
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{
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Formatter<StringView>::format(builder, "?");
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}
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};
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template<typename T>
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struct __FormatIfSupported<T, true> : Formatter<T> {
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void format(FormatBuilder& builder, const FormatIfSupported<T>& value)
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{
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Formatter<T>::format(builder, value.value());
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}
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};
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template<typename T>
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struct Formatter<FormatIfSupported<T>> : __FormatIfSupported<T, HasFormatter<T>> {
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};
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// This is a helper class, the idea is that if you want to implement a formatter you can inherit
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// from this class to "break down" the formatting.
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struct FormatString {
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};
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template<>
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struct Formatter<FormatString> : Formatter<String> {
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template<typename... Parameters>
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void format(FormatBuilder& builder, StringView fmtstr, const Parameters&... parameters)
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{
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vformat(builder, fmtstr, VariadicFormatParams { parameters... });
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}
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void vformat(FormatBuilder& builder, StringView fmtstr, TypeErasedFormatParams params);
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};
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} // namespace AK
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#ifdef KERNEL
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using AK::critical_dmesgln;
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using AK::dmesgln;
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#else
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using AK::out;
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using AK::outln;
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using AK::warn;
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using AK::warnln;
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#endif
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using AK::dbgln;
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using AK::CheckedFormatString;
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using AK::FormatIfSupported;
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using AK::FormatString;
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#define dbgln_if(flag, fmt, ...) \
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do { \
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if constexpr (flag) \
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dbgln(fmt, ##__VA_ARGS__); \
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} while (0)
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