ladybird/Userland/Utilities/wc.cpp
Ali Mohammad Pur 5e1499d104 Everywhere: Rename {Deprecated => Byte}String
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')
2023-12-17 18:25:10 +03:30

139 lines
4.0 KiB
C++

/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2021, Emanuele Torre <torreemanuele6@gmail.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/ByteString.h>
#include <AK/CharacterTypes.h>
#include <AK/Vector.h>
#include <LibCore/ArgsParser.h>
#include <LibCore/File.h>
#include <LibCore/System.h>
#include <ctype.h>
#include <stdio.h>
#include <sys/stat.h>
#include <unistd.h>
struct Count {
StringView name;
bool exists { true };
unsigned lines { 0 };
unsigned characters { 0 };
unsigned words { 0 };
unsigned max_line_length { 0 };
size_t bytes { 0 };
};
bool g_output_line = false;
bool g_output_byte = false;
bool g_output_word = false;
bool g_output_max_line_length = false;
static void wc_out(Count const& count)
{
if (g_output_line)
out("{:7} ", count.lines);
if (g_output_word)
out("{:7} ", count.words);
if (g_output_byte)
out("{:7} ", count.bytes);
if (g_output_max_line_length)
out("{:7} ", count.max_line_length);
outln("{:>14}", count.name);
}
static ErrorOr<Count> get_count(StringView file_specifier)
{
Count count;
auto maybe_file = Core::File::open_file_or_standard_stream(file_specifier, Core::File::OpenMode::Read);
if (maybe_file.is_error()) {
warnln("wc: unable to open {}", file_specifier.is_empty() ? "stdin"sv : file_specifier);
count.exists = false;
return count;
}
auto file = TRY(Core::InputBufferedFile::create(maybe_file.release_value()));
count.name = file_specifier;
bool start_a_new_word = true;
unsigned current_line_length = 0;
u8 ch;
for (Bytes bytes = TRY(file->read_some({ &ch, 1 })); bytes.size() != 0; bytes = TRY(file->read_some(bytes))) {
count.bytes++;
if (ch != '\n')
current_line_length++;
if (is_ascii_space(ch)) {
start_a_new_word = true;
if (ch == '\n') {
count.lines++;
if (current_line_length > count.max_line_length)
count.max_line_length = current_line_length;
current_line_length = 0;
}
} else if (start_a_new_word) {
start_a_new_word = false;
count.words++;
}
}
return count;
}
static Count get_total_count(Vector<Count> const& counts)
{
Count total_count { "total"sv };
for (auto& count : counts) {
total_count.lines += count.lines;
total_count.words += count.words;
total_count.characters += count.characters;
total_count.bytes += count.bytes;
if (count.max_line_length > total_count.max_line_length)
total_count.max_line_length = count.max_line_length;
}
return total_count;
}
ErrorOr<int> serenity_main(Main::Arguments arguments)
{
TRY(Core::System::pledge("stdio rpath"));
Vector<StringView> file_specifiers;
Core::ArgsParser args_parser;
args_parser.add_option(g_output_line, "Output line count", "lines", 'l');
args_parser.add_option(g_output_byte, "Output byte count", "bytes", 'c');
args_parser.add_option(g_output_word, "Output word count", "words", 'w');
args_parser.add_option(g_output_max_line_length, "Output byte count of the longest line", "max-line-length", 'L');
args_parser.add_positional_argument(file_specifiers, "File to process", "file", Core::ArgsParser::Required::No);
args_parser.parse(arguments);
if (!g_output_line && !g_output_byte && !g_output_word && !g_output_max_line_length)
g_output_line = g_output_byte = g_output_word = true;
Vector<Count> counts;
for (auto const& file_specifier : file_specifiers)
counts.append(TRY(get_count(file_specifier)));
TRY(Core::System::pledge("stdio"));
if (file_specifiers.is_empty())
counts.append(TRY(get_count(""sv)));
else if (file_specifiers.size() > 1)
counts.append(get_total_count(counts));
for (auto const& count : counts) {
if (count.exists)
wc_out(count);
}
return 0;
}