mirror of
https://github.com/LadybirdBrowser/ladybird.git
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5e1499d104
This commit un-deprecates DeprecatedString, and repurposes it as a byte
string.
As the null state has already been removed, there are no other
particularly hairy blockers in repurposing this type as a byte string
(what it _really_ is).
This commit is auto-generated:
$ xs=$(ack -l \bDeprecatedString\b\|deprecated_string AK Userland \
Meta Ports Ladybird Tests Kernel)
$ perl -pie 's/\bDeprecatedString\b/ByteString/g;
s/deprecated_string/byte_string/g' $xs
$ clang-format --style=file -i \
$(git diff --name-only | grep \.cpp\|\.h)
$ gn format $(git ls-files '*.gn' '*.gni')
129 lines
4.1 KiB
C++
129 lines
4.1 KiB
C++
/*
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* Copyright (c) 2018-2020, 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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#include <AK/CharacterTypes.h>
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#include <AK/GenericLexer.h>
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#include <LibCore/ArgsParser.h>
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#include <LibCore/System.h>
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#include <LibMain/Main.h>
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#include <stdio.h>
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#include <unistd.h>
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static u8 parse_octal_number(GenericLexer& lexer)
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{
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u32 value = 0;
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for (size_t count = 0; count < 3; ++count) {
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auto c = lexer.peek();
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if (!(c >= '0' && c <= '7'))
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break;
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value = value * 8 + (c - '0');
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lexer.consume();
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}
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clamp(value, 0, 255);
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return value;
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}
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static Optional<u8> parse_hex_number(GenericLexer& lexer)
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{
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u8 value = 0;
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for (size_t count = 0; count < 2; ++count) {
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auto c = lexer.peek();
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if (!is_ascii_hex_digit(c))
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return {};
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value = value * 16 + parse_ascii_hex_digit(c);
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lexer.consume();
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}
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return value;
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}
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static ByteString interpret_backslash_escapes(StringView string, bool& no_trailing_newline)
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{
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static constexpr auto escape_map = "a\ab\be\ef\fn\nr\rt\tv\v"sv;
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static constexpr auto unescaped_chars = "\a\b\e\f\n\r\t\v\\"sv;
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StringBuilder builder;
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GenericLexer lexer { string };
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while (!lexer.is_eof()) {
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auto this_index = lexer.tell();
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auto this_char = lexer.consume();
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if (this_char == '\\') {
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if (lexer.is_eof()) {
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builder.append('\\');
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break;
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}
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auto next_char = lexer.peek();
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if (next_char == 'c') {
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no_trailing_newline = true;
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break;
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}
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if (next_char == '0') {
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lexer.consume();
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auto octal_number = parse_octal_number(lexer);
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builder.append(octal_number);
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} else if (next_char == 'x') {
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lexer.consume();
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auto maybe_hex_number = parse_hex_number(lexer);
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if (!maybe_hex_number.has_value()) {
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auto bad_substring = string.substring_view(this_index, lexer.tell() - this_index);
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builder.append(bad_substring);
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} else {
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builder.append(maybe_hex_number.release_value());
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}
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} else if (next_char == 'u') {
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lexer.retreat();
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auto maybe_code_point = lexer.consume_escaped_code_point();
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if (maybe_code_point.is_error()) {
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auto bad_substring = string.substring_view(this_index, lexer.tell() - this_index);
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builder.append(bad_substring);
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} else {
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builder.append_code_point(maybe_code_point.release_value());
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}
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} else {
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lexer.retreat();
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auto consumed_char = lexer.consume_escaped_character('\\', escape_map);
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if (!unescaped_chars.contains(consumed_char))
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builder.append('\\');
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builder.append(consumed_char);
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}
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} else {
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builder.append(this_char);
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}
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}
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return builder.to_byte_string();
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}
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ErrorOr<int> serenity_main(Main::Arguments arguments)
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{
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TRY(Core::System::pledge("stdio"));
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Vector<ByteString> text;
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bool no_trailing_newline = false;
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bool should_interpret_backslash_escapes = false;
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Core::ArgsParser args_parser;
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args_parser.add_option(no_trailing_newline, "Do not output a trailing newline", nullptr, 'n');
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args_parser.add_option(should_interpret_backslash_escapes, "Interpret backslash escapes", nullptr, 'e');
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args_parser.add_positional_argument(text, "Text to print out", "text", Core::ArgsParser::Required::No);
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args_parser.set_stop_on_first_non_option(true);
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args_parser.parse(arguments);
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if (text.is_empty()) {
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if (!no_trailing_newline)
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outln();
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return 0;
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}
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auto output = ByteString::join(' ', text);
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if (should_interpret_backslash_escapes)
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output = interpret_backslash_escapes(output, no_trailing_newline);
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out("{}", output);
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if (!no_trailing_newline)
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outln();
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return 0;
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}
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