164 lines
4.1 KiB
C++
164 lines
4.1 KiB
C++
/*
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* Copyright 2003-2016 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include "Traits.hxx"
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#include "util/StringCompare.hxx"
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#include <string.h>
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template<typename Traits>
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typename Traits::string
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BuildPathImpl(typename Traits::const_pointer_type a, size_t a_size,
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typename Traits::const_pointer_type b, size_t b_size)
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{
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assert(a != nullptr);
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assert(b != nullptr);
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if (a_size == 0)
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return typename Traits::string(b, b_size);
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if (b_size == 0)
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return typename Traits::string(a, a_size);
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typename Traits::string result(a, a_size);
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if (!Traits::IsSeparator(a[a_size - 1]))
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result.push_back(Traits::SEPARATOR);
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if (Traits::IsSeparator(b[0]))
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result.append(b + 1, b_size - 1);
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else
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result.append(b, b_size);
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return result;
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}
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template<typename Traits>
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typename Traits::const_pointer_type
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GetBasePathImpl(typename Traits::const_pointer_type p)
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{
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#if !CLANG_CHECK_VERSION(3,6)
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/* disabled on clang due to -Wtautological-pointer-compare */
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assert(p != nullptr);
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#endif
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typename Traits::const_pointer_type sep = Traits::FindLastSeparator(p);
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return sep != nullptr
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? sep + 1
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: p;
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}
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template<typename Traits>
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typename Traits::string
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GetParentPathImpl(typename Traits::const_pointer_type p)
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{
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#if !CLANG_CHECK_VERSION(3,6)
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/* disabled on clang due to -Wtautological-pointer-compare */
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assert(p != nullptr);
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#endif
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typename Traits::const_pointer_type sep = Traits::FindLastSeparator(p);
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if (sep == nullptr)
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return typename Traits::string(Traits::CURRENT_DIRECTORY);
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if (sep == p)
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return typename Traits::string(p, p + 1);
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#ifdef WIN32
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if (Traits::IsDrive(p) && sep == p + 2)
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return typename Traits::string(p, p + 3);
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#endif
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return typename Traits::string(p, sep);
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}
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template<typename Traits>
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typename Traits::const_pointer_type
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RelativePathImpl(typename Traits::const_pointer_type base,
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typename Traits::const_pointer_type other)
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{
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assert(base != nullptr);
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assert(other != nullptr);
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other = StringAfterPrefix(other, base);
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if (other == nullptr)
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/* mismatch */
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return nullptr;
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if (*other != 0) {
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if (!Traits::IsSeparator(*other))
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/* mismatch */
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return nullptr;
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/* skip remaining path separators */
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do {
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++other;
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} while (Traits::IsSeparator(*other));
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}
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return other;
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}
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PathTraitsFS::string
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PathTraitsFS::Build(const_pointer_type a, size_t a_size,
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const_pointer_type b, size_t b_size)
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{
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return BuildPathImpl<PathTraitsFS>(a, a_size, b, b_size);
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}
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PathTraitsFS::const_pointer_type
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PathTraitsFS::GetBase(PathTraitsFS::const_pointer_type p)
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{
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return GetBasePathImpl<PathTraitsFS>(p);
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}
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PathTraitsFS::string
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PathTraitsFS::GetParent(PathTraitsFS::const_pointer_type p)
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{
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return GetParentPathImpl<PathTraitsFS>(p);
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}
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PathTraitsFS::const_pointer_type
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PathTraitsFS::Relative(const_pointer_type base, const_pointer_type other)
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{
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return RelativePathImpl<PathTraitsFS>(base, other);
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}
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PathTraitsUTF8::string
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PathTraitsUTF8::Build(const_pointer_type a, size_t a_size,
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const_pointer_type b, size_t b_size)
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{
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return BuildPathImpl<PathTraitsUTF8>(a, a_size, b, b_size);
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}
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PathTraitsUTF8::const_pointer_type
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PathTraitsUTF8::GetBase(const_pointer_type p)
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{
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return GetBasePathImpl<PathTraitsUTF8>(p);
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}
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PathTraitsUTF8::string
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PathTraitsUTF8::GetParent(const_pointer_type p)
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{
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return GetParentPathImpl<PathTraitsUTF8>(p);
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}
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PathTraitsUTF8::const_pointer_type
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PathTraitsUTF8::Relative(const_pointer_type base, const_pointer_type other)
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{
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return RelativePathImpl<PathTraitsUTF8>(base, other);
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}
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