mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2025-06-10 18:10:56 +09:00
LibTextCodec: Add GBK/GB18030 decoder
Includes changes from GB-18030-2022, which are not yet included in the Encoding Specification, but WebKit, Blink and WPT are already updated.
This commit is contained in:
Simon Wanner
Andreas Kling
parent
9ed52504ab
commit
2ce61fe6ea
Notes:
sideshowbarker
2024-07-17 03:35:16 +09:00
Author: https://github.com/skyrising
Commit: 2ce61fe6ea
Pull-request: https://github.com/SerenityOS/serenity/pull/24485
Reviewed-by: https://github.com/ADKaster
8 changed files with 497 additions and 0 deletions
|
|
@ -0,0 +1,220 @@
|
|||
/*
|
||||
* Copyright (c) 2024, Simon Wanner <simon@skyrising.xyz>
|
||||
*
|
||||
* SPDX-License-Identifier: BSD-2-Clause
|
||||
*/
|
||||
|
||||
#include <AK/Array.h>
|
||||
#include <AK/JsonObject.h>
|
||||
#include <AK/NumericLimits.h>
|
||||
#include <AK/SourceGenerator.h>
|
||||
#include <AK/StringBuilder.h>
|
||||
#include <AK/StringView.h>
|
||||
#include <AK/Vector.h>
|
||||
#include <LibCore/ArgsParser.h>
|
||||
#include <LibCore/File.h>
|
||||
#include <LibMain/Main.h>
|
||||
|
||||
struct LookupTable {
|
||||
u32 first_pointer;
|
||||
u32 max_code_point;
|
||||
Vector<u32> code_points;
|
||||
};
|
||||
|
||||
struct LookupTables {
|
||||
JsonArray const& gb18030_ranges;
|
||||
OrderedHashMap<StringView, LookupTable> indexes;
|
||||
};
|
||||
|
||||
LookupTable prepare_table(JsonArray const& data)
|
||||
{
|
||||
Vector<u32> code_points;
|
||||
code_points.ensure_capacity(data.size());
|
||||
u32 max = 0;
|
||||
u32 first_pointer = 0;
|
||||
for (auto const& entry : data.values()) {
|
||||
if (entry.is_null()) {
|
||||
if (code_points.is_empty()) {
|
||||
first_pointer++;
|
||||
} else {
|
||||
code_points.append(0xfffd);
|
||||
max = AK::max(max, code_points.last());
|
||||
}
|
||||
} else {
|
||||
code_points.append(entry.as_integer<u32>());
|
||||
max = AK::max(max, code_points.last());
|
||||
}
|
||||
}
|
||||
while (code_points.last() == 0xfffd)
|
||||
code_points.take_last();
|
||||
return { first_pointer, max, move(code_points) };
|
||||
}
|
||||
|
||||
void generate_table(SourceGenerator generator, StringView name, LookupTable& table)
|
||||
{
|
||||
generator.set("name", name);
|
||||
generator.set("value_type", table.max_code_point > NumericLimits<u16>::max() ? "u32" : "u16");
|
||||
generator.set("first_pointer", MUST(String::number(table.first_pointer)));
|
||||
generator.set("size", MUST(String::number(table.code_points.size())));
|
||||
|
||||
if (table.first_pointer > 0) {
|
||||
generator.appendln("static constexpr u32 s_@name@_index_first_pointer = @first_pointer@;");
|
||||
}
|
||||
|
||||
generator.append("static constexpr Array<@value_type@, @size@> s_@name@_index {\n ");
|
||||
for (size_t i = 0; i < table.code_points.size(); i++) {
|
||||
generator.append(MUST(String::formatted("{:#04x}", table.code_points[i])));
|
||||
if (i != table.code_points.size() - 1)
|
||||
generator.append(i % 16 == 15 ? ",\n "sv : ", "sv);
|
||||
}
|
||||
generator.appendln("\n};");
|
||||
generator.appendln("Optional<u32> index_@name@_code_point(u32 pointer);");
|
||||
}
|
||||
|
||||
ErrorOr<void> generate_header_file(LookupTables& tables, Core::File& file)
|
||||
{
|
||||
StringBuilder builder;
|
||||
SourceGenerator generator { builder };
|
||||
|
||||
generator.set("gb18030_ranges_size", MUST(String::number(tables.gb18030_ranges.size())));
|
||||
|
||||
generator.append(R"~~~(
|
||||
#pragma once
|
||||
|
||||
#include <AK/Array.h>
|
||||
#include <AK/Types.h>
|
||||
|
||||
namespace TextCodec {
|
||||
|
||||
struct Gb18030RangeEntry {
|
||||
u32 pointer;
|
||||
u32 code_point;
|
||||
};
|
||||
|
||||
static constexpr Array<Gb18030RangeEntry, @gb18030_ranges_size@> s_gb18030_ranges { {
|
||||
)~~~");
|
||||
|
||||
for (auto const& range : tables.gb18030_ranges.values()) {
|
||||
generator.appendln(MUST(String::formatted(" {{ {}, {:#04x} }},", range.as_array()[0].as_integer<u32>(), range.as_array()[1].as_integer<u32>())));
|
||||
}
|
||||
generator.appendln("} };\n");
|
||||
|
||||
for (auto e : tables.indexes) {
|
||||
generate_table(generator.fork(), e.key, e.value);
|
||||
}
|
||||
|
||||
generator.append("\n");
|
||||
generator.appendln("}");
|
||||
|
||||
TRY(file.write_until_depleted(generator.as_string_view().bytes()));
|
||||
return {};
|
||||
}
|
||||
|
||||
void generate_table_implementation(SourceGenerator generator, StringView name, LookupTable& table)
|
||||
{
|
||||
generator.set("name", name);
|
||||
generator.set("first_pointer", MUST(String::number(table.first_pointer)));
|
||||
generator.set("size", MUST(String::number(table.code_points.size())));
|
||||
|
||||
if (table.first_pointer > 0) {
|
||||
generator.append(R"~~~(
|
||||
Optional<u32> index_@name@_code_point(u32 pointer)
|
||||
{
|
||||
if (pointer < s_@name@_index_first_pointer || pointer - s_@name@_index_first_pointer >= s_@name@_index.size())
|
||||
return {};
|
||||
auto value = s_@name@_index[pointer - s_@name@_index_first_pointer];
|
||||
if (value == 0xfffd)
|
||||
return {};
|
||||
return value;
|
||||
}
|
||||
)~~~");
|
||||
} else {
|
||||
generator.append(R"~~~(
|
||||
Optional<u32> index_@name@_code_point(u32 pointer)
|
||||
{
|
||||
if (pointer >= s_@name@_index.size())
|
||||
return {};
|
||||
auto value = s_@name@_index[pointer];
|
||||
if (value == 0xfffd)
|
||||
return {};
|
||||
return value;
|
||||
}
|
||||
)~~~");
|
||||
}
|
||||
}
|
||||
|
||||
ErrorOr<void> generate_implementation_file(LookupTables& tables, Core::File& file)
|
||||
{
|
||||
StringBuilder builder;
|
||||
SourceGenerator generator { builder };
|
||||
|
||||
generator.append(R"~~~(
|
||||
#include <LibTextCodec/LookupTables.h>
|
||||
|
||||
namespace TextCodec {
|
||||
)~~~");
|
||||
|
||||
for (auto e : tables.indexes) {
|
||||
generate_table_implementation(generator.fork(), e.key, e.value);
|
||||
}
|
||||
|
||||
generator.appendln("\n}");
|
||||
|
||||
TRY(file.write_until_depleted(generator.as_string_view().bytes()));
|
||||
return {};
|
||||
}
|
||||
|
||||
ErrorOr<int> serenity_main(Main::Arguments arguments)
|
||||
{
|
||||
StringView generated_header_path;
|
||||
StringView generated_implementation_path;
|
||||
StringView json_path;
|
||||
|
||||
Core::ArgsParser args_parser;
|
||||
args_parser.add_option(generated_header_path, "Path to the lookup table header file to generate", "generated-header-path", 'h', "generated-header-path");
|
||||
args_parser.add_option(generated_implementation_path, "Path to the lookup table implementation file to generate", "generated-implementation-path", 'c', "generated-implementation-path");
|
||||
args_parser.add_option(json_path, "Path to the JSON file to read from", "json-path", 'j', "json-path");
|
||||
args_parser.parse(arguments);
|
||||
|
||||
auto json_file = TRY(Core::File::open(json_path, Core::File::OpenMode::Read));
|
||||
auto json_data = TRY(json_file->read_until_eof());
|
||||
auto data = TRY(JsonValue::from_string(json_data)).as_object();
|
||||
|
||||
auto gb18030_table = prepare_table(data.get("gb18030"sv)->as_array());
|
||||
|
||||
// FIXME: Encoding specification is not updated to GB-18030-2022 yet (https://github.com/whatwg/encoding/issues/312)
|
||||
// NOTE: See https://commits.webkit.org/264918@main
|
||||
gb18030_table.code_points[7182] = 0xfe10;
|
||||
gb18030_table.code_points[7183] = 0xfe12;
|
||||
gb18030_table.code_points[7184] = 0xfe11;
|
||||
gb18030_table.code_points[7185] = 0xfe13;
|
||||
gb18030_table.code_points[7186] = 0xfe14;
|
||||
gb18030_table.code_points[7187] = 0xfe15;
|
||||
gb18030_table.code_points[7188] = 0xfe16;
|
||||
gb18030_table.code_points[7201] = 0xfe17;
|
||||
gb18030_table.code_points[7202] = 0xfe18;
|
||||
gb18030_table.code_points[7208] = 0xfe19;
|
||||
gb18030_table.code_points[23775] = 0x9fb4;
|
||||
gb18030_table.code_points[23783] = 0x9fb5;
|
||||
gb18030_table.code_points[23788] = 0x9fb6;
|
||||
gb18030_table.code_points[23789] = 0x9fb7;
|
||||
gb18030_table.code_points[23795] = 0x9fb8;
|
||||
gb18030_table.code_points[23812] = 0x9fb9;
|
||||
gb18030_table.code_points[23829] = 0x9fba;
|
||||
gb18030_table.code_points[23845] = 0x9fbb;
|
||||
|
||||
LookupTables tables {
|
||||
.gb18030_ranges = data.get("gb18030-ranges"sv)->as_array(),
|
||||
.indexes = {
|
||||
{ "gb18030"sv, move(gb18030_table) },
|
||||
},
|
||||
};
|
||||
|
||||
auto generated_header_file = TRY(Core::File::open(generated_header_path, Core::File::OpenMode::Write));
|
||||
auto generated_implementation_file = TRY(Core::File::open(generated_implementation_path, Core::File::OpenMode::Write));
|
||||
|
||||
TRY(generate_header_file(tables, *generated_header_file));
|
||||
TRY(generate_implementation_file(tables, *generated_implementation_file));
|
||||
|
||||
return 0;
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue