ladybird/Libraries/LibCore/DirIterator.cpp
2020-02-06 15:04:03 +01:00

97 lines
2.7 KiB
C++

/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <LibCore/DirIterator.h>
#include <errno.h>
namespace Core {
DirIterator::DirIterator(const StringView& path, Flags flags)
: m_flags(flags)
{
m_dir = opendir(String(path).characters());
if (m_dir == nullptr) {
m_error = errno;
}
}
DirIterator::~DirIterator()
{
if (m_dir != nullptr) {
closedir(m_dir);
m_dir = nullptr;
}
}
bool DirIterator::advance_next()
{
if (m_dir == nullptr)
return false;
bool keep_advancing = true;
while (keep_advancing) {
errno = 0;
auto* de = readdir(m_dir);
if (de) {
m_next = de->d_name;
} else {
m_error = errno;
m_next = String();
}
if (m_next.is_null()) {
keep_advancing = false;
} else if (m_flags & Flags::SkipDots) {
if (m_next.length() < 1 || m_next[0] != '.') {
keep_advancing = false;
}
} else {
keep_advancing = false;
}
}
return m_next.length() > 0;
}
bool DirIterator::has_next()
{
if (!m_next.is_null())
return true;
return advance_next();
}
String DirIterator::next_path()
{
if (m_next.is_null())
advance_next();
auto tmp = m_next;
m_next = String();
return tmp;
}
}