refactor: replace boost::filesystem with std::filesystem

Warning: Replacing fs::system_complete calls with fs::absolute calls
in this commit may cause minor changes in behaviour because fs::absolute
no longer strips trailing slashes; however these changes are believed to
be safe.

Co-authored-by: Russell Yanofsky <russ@yanofsky.org>
Co-authored-by: Hennadii Stepanov <32963518+hebasto@users.noreply.github.com>

1 files changed, 1 insertions, 115 deletions

diff --git a/src/fs.cpp b/src/fs.cpp
index 8fcadcb3ef..219fdee959 100644
--- a/src/fs.cpp
+++ b/src/fs.cpp
@@ -37,7 +37,7 @@ FILE *fopen(const fs::path& p, const char *mode)
 fs::path AbsPathJoin(const fs::path& base, const fs::path& path)
 {
     assert(base.is_absolute());
-    return fs::absolute(path, base);
+    return path.empty() ? base : fs::path(base / path);
 }
 
 #ifndef WIN32
@@ -153,118 +153,4 @@ std::string get_filesystem_error_message(const fs::filesystem_error& e)
 #endif
 }
 
-#ifdef WIN32
-#ifdef __GLIBCXX__
-
-// reference: https://github.com/gcc-mirror/gcc/blob/gcc-7_3_0-release/libstdc%2B%2B-v3/include/std/fstream#L270
-#if defined(__GNUC__) && !defined(__clang__)
-#pragma GCC diagnostic push
-#pragma GCC diagnostic ignored "-Wswitch"
-#endif
-static std::string openmodeToStr(std::ios_base::openmode mode)
-{
-    switch (mode & ~std::ios_base::ate) {
-    case std::ios_base::out:
-    case std::ios_base::out | std::ios_base::trunc:
-        return "w";
-    case std::ios_base::out | std::ios_base::app:
-    case std::ios_base::app:
-        return "a";
-    case std::ios_base::in:
-        return "r";
-    case std::ios_base::in | std::ios_base::out:
-        return "r+";
-    case std::ios_base::in | std::ios_base::out | std::ios_base::trunc:
-        return "w+";
-    case std::ios_base::in | std::ios_base::out | std::ios_base::app:
-    case std::ios_base::in | std::ios_base::app:
-        return "a+";
-    case std::ios_base::out | std::ios_base::binary:
-    case std::ios_base::out | std::ios_base::trunc | std::ios_base::binary:
-        return "wb";
-    case std::ios_base::out | std::ios_base::app | std::ios_base::binary:
-    case std::ios_base::app | std::ios_base::binary:
-        return "ab";
-    case std::ios_base::in | std::ios_base::binary:
-        return "rb";
-    case std::ios_base::in | std::ios_base::out | std::ios_base::binary:
-        return "r+b";
-    case std::ios_base::in | std::ios_base::out | std::ios_base::trunc | std::ios_base::binary:
-        return "w+b";
-    case std::ios_base::in | std::ios_base::out | std::ios_base::app | std::ios_base::binary:
-    case std::ios_base::in | std::ios_base::app | std::ios_base::binary:
-        return "a+b";
-    default:
-        return std::string();
-    }
-}
-#if defined(__GNUC__) && !defined(__clang__)
-#pragma GCC diagnostic pop
-#endif
-
-void ifstream::open(const fs::path& p, std::ios_base::openmode mode)
-{
-    close();
-    mode |= std::ios_base::in;
-    m_file = fsbridge::fopen(p, openmodeToStr(mode).c_str());
-    if (m_file == nullptr) {
-        return;
-    }
-    m_filebuf = __gnu_cxx::stdio_filebuf<char>(m_file, mode);
-    rdbuf(&m_filebuf);
-    if (mode & std::ios_base::ate) {
-        seekg(0, std::ios_base::end);
-    }
-}
-
-void ifstream::close()
-{
-    if (m_file != nullptr) {
-        m_filebuf.close();
-        fclose(m_file);
-    }
-    m_file = nullptr;
-}
-
-void ofstream::open(const fs::path& p, std::ios_base::openmode mode)
-{
-    close();
-    mode |= std::ios_base::out;
-    m_file = fsbridge::fopen(p, openmodeToStr(mode).c_str());
-    if (m_file == nullptr) {
-        return;
-    }
-    m_filebuf = __gnu_cxx::stdio_filebuf<char>(m_file, mode);
-    rdbuf(&m_filebuf);
-    if (mode & std::ios_base::ate) {
-        seekp(0, std::ios_base::end);
-    }
-}
-
-void ofstream::close()
-{
-    if (m_file != nullptr) {
-        m_filebuf.close();
-        fclose(m_file);
-    }
-    m_file = nullptr;
-}
-#else // __GLIBCXX__
-
-#if BOOST_VERSION >= 107700
-static_assert(sizeof(*BOOST_FILESYSTEM_C_STR(boost::filesystem::path())) == sizeof(wchar_t),
-#else
-static_assert(sizeof(*boost::filesystem::path().BOOST_FILESYSTEM_C_STR) == sizeof(wchar_t),
-#endif // BOOST_VERSION >= 107700
-    "Warning: This build is using boost::filesystem ofstream and ifstream "
-    "implementations which will fail to open paths containing multibyte "
-    "characters. You should delete this static_assert to ignore this warning, "
-    "or switch to a different C++ standard library like the Microsoft C++ "
-    "Standard Library (where boost uses non-standard extensions to construct "
-    "stream objects with wide filenames), or the GNU libstdc++ library (where "
-    "a more complicated workaround has been implemented above).");
-
-#endif // __GLIBCXX__
-#endif // WIN32
-
 } // fsbridge