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FileUtils.cpp
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FileUtils.cpp
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/*
* Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
#include <memory>
#include <algorithm>
#include "FileUtils.h"
namespace FileUtils {
#ifdef _WIN32
const tstring::value_type pathSeparator = _T(';');
#else
const tstring::value_type pathSeparator = _T(':');
#endif
namespace {
#ifdef _WIN32
const tstring::value_type dirSeparator = _T('\\');
const tstring::value_type alianDirSeparator = _T('/');
#else
const tstring::value_type dirSeparator = _T('/');
const tstring::value_type alianDirSeparator = _T('\\');
#endif
} // namespace
bool isDirSeparator(const tstring::value_type c) {
return (c == dirSeparator || c == alianDirSeparator);
}
tstring dirname(const tstring &path) {
tstring::size_type pos;
if (tstrings::endsWith(path, _T("/.")) || tstrings::endsWith(path, _T("\\."))) {
// this method is really getparent dirname - if the path ends with "/.",
// we need to ignore that when looking for the last "/" to find parent
pos = (path.substr(0, path.length() - 2)).find_last_of(_T("\\/"));
} else {
pos = path.find_last_of(_T("\\/"));
}
if (pos != tstring::npos) {
pos = path.find_last_not_of(_T("\\/"), pos); // skip trailing slashes
}
return pos == tstring::npos ? tstring() : path.substr(0, pos + 1);
}
tstring basename(const tstring &path) {
const tstring::size_type pos = path.find_last_of(_T("\\/"));
if (pos == tstring::npos) {
return path;
}
return path.substr(pos + 1);
}
tstring suffix(const tstring &path) {
const tstring::size_type pos = path.rfind(_T('.'));
if (pos == tstring::npos) {
return tstring();
}
const tstring::size_type dirSepPos = path.find_first_of(_T("\\/"),
pos + 1);
if (dirSepPos != tstring::npos) {
return tstring();
}
// test for '/..' and '..' cases
if (pos != 0 && path[pos - 1] == _T('.')
&& (pos == 1 || isDirSeparator(path[pos - 2]))) {
return tstring();
}
return path.substr(pos);
}
tstring combinePath(const tstring& parent, const tstring& child) {
if (parent.empty()) {
return child;
}
if (child.empty()) {
return parent;
}
tstring parentWOSlash = removeTrailingSlash(parent);
// also handle the case when child contains starting slash
bool childHasSlash = isDirSeparator(*child.begin());
tstring childWOSlash = childHasSlash ? child.substr(1) : child;
return parentWOSlash.append(1, dirSeparator).append(childWOSlash);
}
tstring removeTrailingSlash(const tstring& path) {
if (path.empty()) {
return path;
}
tstring::const_reverse_iterator it = path.rbegin();
tstring::const_reverse_iterator end = path.rend();
while (it != end && isDirSeparator(*it)) {
++it;
}
return path.substr(0, end - it);
}
tstring normalizePath(tstring v) {
std::replace(v.begin(), v.end(), alianDirSeparator, dirSeparator);
#ifdef _WIN32
return tstrings::toLower(v);
#else
return v;
#endif
}
tstring replaceSuffix(const tstring& path, const tstring& newSuffix) {
const tstring oldSuffix = suffix(path);
if (oldSuffix.empty()) {
return tstring().append(path).append(newSuffix);
}
return path.substr(0, path.size() - oldSuffix.size()).append(newSuffix);
}
} // namespace FileUtils