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sort: Add the -z option to split lines on \0 rather than a newline

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Tim Ledbetter 2023-08-26 23:21:54 +01:00 committed by Tim Flynn
parent b7676cc436
commit e6112446db
Notes: sideshowbarker 2024-07-17 06:33:00 +09:00 
Author: https://github.com/tcl3
Commit: https://github.com/SerenityOS/serenity/commit/e6112446db
Pull-request: https://github.com/SerenityOS/serenity/pull/20800
Reviewed-by: https://github.com/trflynn89
2 changed files with 10 additions and 7 deletions
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1
Base/usr/share/man/man1/sort.md
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@ -19,6 +19,7 @@ Sort each lines of INPUT (or standard input). A quick sort algorithm is used.
* `-n`, `--numeric`: Treat the key field as a number
* `-t char`, `--sep char`: The separator to split fields by
* `-r`, `--reverse`: Sort in reverse order
* `-z`, `--zero-terminated`: Use `\0` as the line delimiter instead of a newline
## Examples

16
Userland/Utilities/sort.cpp
View file

@ -56,11 +56,12 @@ struct Options {
bool unique { false };
bool numeric { false };
bool reverse { false };
bool zero_terminated { false };
StringView separator { "\0", 1 };
Vector<DeprecatedString> files;
};
static ErrorOr<void> load_file(Options options, StringView filename, Vector<Line>& lines, HashTable<Line>& seen)
static ErrorOr<void> load_file(Options const& options, StringView filename, StringView line_delimiter, Vector<Line>& lines, HashTable<Line>& seen)
{
auto file = TRY(Core::InputBufferedFile::create(
TRY(Core::File::open_file_or_standard_stream(filename, Core::File::OpenMode::Read))));
@ -68,8 +69,7 @@ static ErrorOr<void> load_file(Options options, StringView filename, Vector<Line
// FIXME: Unlimited line length
auto buffer = TRY(ByteBuffer::create_uninitialized(4096));
while (TRY(file->can_read_line())) {
DeprecatedString line = TRY(file->read_line(buffer));
DeprecatedString line { TRY(file->read_until(buffer, line_delimiter)) };
StringView key = line;
if (options.key_field != 0) {
auto split = (options.separator[0])
@ -106,25 +106,27 @@ ErrorOr<int> serenity_main([[maybe_unused]] Main::Arguments arguments)
args_parser.add_option(options.numeric, "treat the key field as a number", "numeric", 'n');
args_parser.add_option(options.separator, "The separator to split fields by", "sep", 't', "char");
args_parser.add_option(options.reverse, "Sort in reverse order", "reverse", 'r');
args_parser.add_option(options.zero_terminated, "Use '\\0' as the line delimiter instead of a newline", "zero-terminated", 'z');
args_parser.add_positional_argument(options.files, "Files to sort", "file", Core::ArgsParser::Required::No);
args_parser.parse(arguments);
auto line_delimiter = options.zero_terminated ? "\0"sv : "\n"sv;
Vector<Line> lines;
HashTable<Line> seen;
if (options.files.size() == 0) {
TRY(load_file(options, "-"sv, lines, seen));
TRY(load_file(options, "-"sv, line_delimiter, lines, seen));
} else {
for (auto& file : options.files) {
TRY(load_file(options, file, lines, seen));
TRY(load_file(options, file, line_delimiter, lines, seen));
}
}
quick_sort(lines);
auto print_lines = [](auto const& lines) {
auto print_lines = [line_delimiter](auto const& lines) {
for (auto& line : lines)
outln("{}", line.line);
out("{}{}", line.line, line_delimiter);
};
if (options.reverse)