mirror of
https://github.com/RGBCube/serenity
synced 2025-10-31 18:12:43 +00:00
6e19ab2bbc
We have a new, improved string type coming up in AK (OOM aware, no null state), and while it's going to use UTF-8, the name UTF8String is a mouthful - so let's free up the String name by renaming the existing class. Making the old one have an annoying name will hopefully also help with quick adoption :^)
98 lines
3.3 KiB
C++
98 lines
3.3 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/DeprecatedString.h>
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#include <AK/Vector.h>
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#include <LibCore/ArgsParser.h>
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#include <LibMain/Main.h>
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#include <errno.h>
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#include <stdio.h>
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#include <string.h>
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enum NumberStyle {
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NumberAllLines,
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NumberNonEmptyLines,
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NumberNoLines,
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};
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ErrorOr<int> serenity_main(Main::Arguments arguments)
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{
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NumberStyle number_style = NumberNonEmptyLines;
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int increment = 1;
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char const* separator = " ";
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int start_number = 1;
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int number_width = 6;
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Vector<DeprecatedString> files;
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Core::ArgsParser args_parser;
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Core::ArgsParser::Option number_style_option {
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Core::ArgsParser::OptionArgumentMode::Required,
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"Line numbering style: 't' for non-empty lines, 'a' for all lines, 'n' for no lines",
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"body-numbering",
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'b',
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"style",
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[&number_style](char const* s) {
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if (!strcmp(s, "t"))
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number_style = NumberNonEmptyLines;
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else if (!strcmp(s, "a"))
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number_style = NumberAllLines;
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else if (!strcmp(s, "n"))
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number_style = NumberNoLines;
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else
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return false;
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return true;
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}
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};
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args_parser.add_option(move(number_style_option));
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args_parser.add_option(increment, "Line count increment", "increment", 'i', "number");
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args_parser.add_option(separator, "Separator between line numbers and lines", "separator", 's', "string");
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args_parser.add_option(start_number, "Initial line number", "startnum", 'v', "number");
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args_parser.add_option(number_width, "Number width", "width", 'w', "number");
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args_parser.add_positional_argument(files, "Files to process", "file", Core::ArgsParser::Required::No);
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args_parser.parse(arguments);
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Vector<FILE*> file_pointers;
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if (!files.is_empty()) {
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for (auto& file : files) {
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FILE* file_pointer = fopen(file.characters(), "r");
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if (!file_pointer) {
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warnln("Failed to open {}: {}", file, strerror(errno));
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continue;
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}
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file_pointers.append(file_pointer);
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}
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} else {
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file_pointers.append(stdin);
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}
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for (auto& file_pointer : file_pointers) {
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int line_number = start_number - increment; // so the line number can start at 1 when added below
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int previous_character = 0;
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int next_character = 0;
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while ((next_character = fgetc(file_pointer)) != EOF) {
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if (previous_character == 0 || previous_character == '\n') {
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if (next_character == '\n' && number_style != NumberAllLines) {
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// Skip printing line count on empty lines.
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outln();
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continue;
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}
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if (number_style != NumberNoLines)
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out("{1:{0}}{2}", number_width, (line_number += increment), separator);
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else
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out("{1:{0}}", number_width, "");
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}
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putchar(next_character);
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previous_character = next_character;
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}
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fclose(file_pointer);
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if (previous_character != '\n')
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outln(); // for cases where files have no trailing newline
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}
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return 0;
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}
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