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332f96e7ca
FileSystemPath::has_extension was jumping through hoops and allocating memory to do a case insensitive comparison needlessly. Extend the existing String::ends_with method to allow the caller to specify the case sensitivity required.
118 lines
3.9 KiB
C++
118 lines
3.9 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/FileSystemPath.h>
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#include <AK/StringBuilder.h>
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#include <AK/StringView.h>
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#include <AK/Vector.h>
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namespace AK {
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FileSystemPath::FileSystemPath(const StringView& s)
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: m_string(s)
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{
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canonicalize();
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m_is_valid = true;
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}
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void FileSystemPath::canonicalize()
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{
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if (m_string.is_empty()) {
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m_parts.clear();
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return;
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}
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m_is_absolute = m_string[0] == '/';
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auto parts = m_string.split_view('/');
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size_t approximate_canonical_length = 0;
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Vector<String> canonical_parts;
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for (size_t i = 0; i < parts.size(); ++i) {
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auto& part = parts[i];
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if (part == ".")
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continue;
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if (part == "..") {
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if (canonical_parts.is_empty()) {
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if (m_is_absolute) {
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// At the root, .. does nothing.
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continue;
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}
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} else {
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if (canonical_parts.last() != "..") {
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// A .. and a previous non-.. part cancel each other.
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canonical_parts.take_last();
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continue;
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}
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}
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}
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if (!part.is_empty()) {
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approximate_canonical_length += part.length() + 1;
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canonical_parts.append(part);
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}
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}
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if (canonical_parts.is_empty()) {
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m_string = m_basename = m_dirname = "/";
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return;
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}
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StringBuilder dirname_builder(approximate_canonical_length);
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for (size_t i = 0; i < canonical_parts.size() - 1; ++i) {
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auto& canonical_part = canonical_parts[i];
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if (m_is_absolute || i != 0)
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dirname_builder.append('/');
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dirname_builder.append(canonical_part);
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}
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m_dirname = dirname_builder.to_string();
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m_basename = canonical_parts.last();
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auto name_parts = m_basename.split('.');
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m_title = name_parts.is_empty() ? String() : name_parts[0];
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if (name_parts.size() > 1)
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m_extension = name_parts.last();
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StringBuilder builder(approximate_canonical_length);
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for (size_t i = 0; i < canonical_parts.size(); ++i) {
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auto& canonical_part = canonical_parts[i];
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if (m_is_absolute || i != 0)
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builder.append('/');
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builder.append(canonical_part);
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}
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m_parts = move(canonical_parts);
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m_string = builder.to_string();
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}
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bool FileSystemPath::has_extension(const StringView& extension) const
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{
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return m_string.ends_with(extension, CaseSensitivity::CaseInsensitive);
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}
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String canonicalized_path(const StringView& path)
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{
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return FileSystemPath(path).string();
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}
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}
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