mirror of
https://github.com/SerenityOS/serenity
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147 lines
4.4 KiB
C++
147 lines
4.4 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <AK/String.h>
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#include <AK/Vector.h>
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#include <LibCore/ArgsParser.h>
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#include <ctype.h>
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#include <stdio.h>
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#include <sys/stat.h>
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struct Count {
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String name;
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bool exists = true;
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unsigned int lines = 0;
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unsigned int characters = 0;
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unsigned int words = 0;
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size_t bytes = 0;
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};
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bool output_line = false;
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bool output_byte = false;
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bool output_word = false;
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static void wc_out(Count& count)
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{
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if (output_line)
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printf("%7i ", count.lines);
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if (output_word)
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printf("%7i ", count.words);
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if (output_byte)
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printf("%7lu ", count.bytes);
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printf("%14s\n", count.name.characters());
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}
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static Count get_count(const String& file_name)
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{
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Count count;
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FILE* file_pointer = nullptr;
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if (file_name == "-") {
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count.name = "";
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file_pointer = stdin;
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} else {
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count.name = file_name;
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if ((file_pointer = fopen(file_name.characters(), "r")) == nullptr) {
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fprintf(stderr, "wc: unable to open %s\n", file_name.characters());
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count.exists = false;
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return count;
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}
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}
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bool start_a_new_word = true;
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for (int ch = fgetc(file_pointer); ch != EOF; ch = fgetc(file_pointer)) {
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count.bytes++;
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if (isspace(ch)) {
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start_a_new_word = true;
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} else if (start_a_new_word) {
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start_a_new_word = false;
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count.words++;
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}
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if (ch == '\n')
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count.lines++;
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}
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return count;
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}
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static Count get_total_count(Vector<Count>& counts)
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{
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Count total_count { "total" };
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for (auto& count : counts) {
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total_count.lines += count.lines;
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total_count.words += count.words;
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total_count.characters += count.characters;
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total_count.bytes += count.bytes;
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}
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return total_count;
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}
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int main(int argc, char** argv)
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{
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if (pledge("stdio rpath", nullptr) < 0) {
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perror("pledge");
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return 1;
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}
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Vector<const char*> files;
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Core::ArgsParser args_parser;
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args_parser.add_option(output_line, "Output line count", "lines", 'l');
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args_parser.add_option(output_byte, "Output byte count", "bytes", 'c');
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args_parser.add_option(output_word, "Output word count", "words", 'w');
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args_parser.add_positional_argument(files, "File to process", "file", Core::ArgsParser::Required::No);
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args_parser.parse(argc, argv);
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if (!output_line && !output_byte && !output_word)
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output_line = output_byte = output_word = true;
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Vector<Count> counts;
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for (auto& file : files) {
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Count count = get_count(file);
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counts.append(count);
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}
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if (pledge("stdio", nullptr) < 0) {
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perror("pledge");
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return 1;
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}
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if (files.size() > 1) {
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Count total_count = get_total_count(counts);
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counts.append(total_count);
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}
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if (files.is_empty()) {
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Count count = get_count("-");
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counts.append(count);
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}
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for (auto& count : counts)
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if (count.exists)
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wc_out(count);
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return 0;
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}
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