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[libcxx] Implement append and operator/ properly for windows

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The root_path function has to be changed to return the parsed bit
as-is; otherwise a path like "//net" gets a root path of "//net/", as
the root name, "//net", gets the root directory (an empty string) appended,
forming "//net/". (The same doesn't happen for the root dir "c:" though.)

Differential Revision: https://reviews.llvm.org/D91178
This commit is contained in:
Martin Storsjö 2020-11-04 15:59:56 +02:00
parent 3ae27fca7e
commit 78d693faec
2 changed files with 92 additions and 8 deletions
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52
libcxx/include/filesystem
View File

@ -1006,14 +1006,44 @@ public:
return *this;
}
private:
template <class _ECharT>
static bool __source_is_absolute(_ECharT __first_or_null) {
return __is_separator(__first_or_null);
}
public:
// appends
#if defined(_LIBCPP_WIN32API)
path& operator/=(const path& __p) {
auto __p_root_name = __p.__root_name();
auto __p_root_name_size = __p_root_name.size();
if (__p.is_absolute() ||
(!__p_root_name.empty() && __p_root_name != root_name())) {
__pn_ = __p.__pn_;
return *this;
}
if (__p.has_root_directory()) {
path __root_name_str = root_name();
__pn_ = __root_name_str.native();
__pn_ += __p.__pn_.substr(__p_root_name_size);
return *this;
}
if (has_filename() || (!has_root_directory() && is_absolute()))
__pn_ += preferred_separator;
__pn_ += __p.__pn_.substr(__p_root_name_size);
return *this;
}
template <class _Source>
_LIBCPP_INLINE_VISIBILITY _EnableIfPathable<_Source>
operator/=(const _Source& __src) {
return operator/=(path(__src));
}
template <class _Source>
_EnableIfPathable<_Source> append(const _Source& __src) {
return operator/=(path(__src));
}
template <class _InputIt>
path& append(_InputIt __first, _InputIt __last) {
return operator/=(path(__first, __last));
}
#else
path& operator/=(const path& __p) {
if (__p.is_absolute()) {
__pn_ = __p.__pn_;
@ -1038,7 +1068,8 @@ public:
_EnableIfPathable<_Source> append(const _Source& __src) {
using _Traits = __is_pathable<_Source>;
using _CVT = _PathCVT<_SourceChar<_Source> >;
if (__source_is_absolute(_Traits::__first_or_null(__src)))
bool __source_is_absolute = __is_separator(_Traits::__first_or_null(__src));
if (__source_is_absolute)
__pn_.clear();
else if (has_filename())
__pn_ += preferred_separator;
@ -1051,13 +1082,14 @@ public:
typedef typename iterator_traits<_InputIt>::value_type _ItVal;
static_assert(__can_convert_char<_ItVal>::value, "Must convertible");
using _CVT = _PathCVT<_ItVal>;
if (__first != __last && __source_is_absolute(*__first))
if (__first != __last && __is_separator(*__first))
__pn_.clear();
else if (has_filename())
__pn_ += preferred_separator;
_CVT::__append_range(__pn_, __first, __last);
return *this;
}
#endif
// concatenation
_LIBCPP_INLINE_VISIBILITY
@ -1295,7 +1327,11 @@ public:
return string_type(__root_directory());
}
_LIBCPP_INLINE_VISIBILITY path root_path() const {
#if defined(_LIBCPP_WIN32API)
return string_type(__root_path_raw());
#else
return root_name().append(string_type(__root_directory()));
#endif
}
_LIBCPP_INLINE_VISIBILITY path relative_path() const {
return string_type(__relative_path());

48
libcxx/test/std/input.output/filesystems/class.path/path.member/path.append.pass.cpp
View File

@ -63,6 +63,54 @@ const AppendOperatorTestcase Cases[] =
, {S("/p1"), S("/p2/"), S("/p2/")}
, {S("p1"), S(""), S("p1/")}
, {S("p1/"), S(""), S("p1/")}
, {S("//host"), S("foo"), S("//host/foo")}
, {S("//host/"), S("foo"), S("//host/foo")}
, {S("//host"), S(""), S("//host/")}
#ifdef _WIN32
, {S("foo"), S("C:/bar"), S("C:/bar")}
, {S("foo"), S("C:"), S("C:")}
, {S("C:"), S(""), S("C:")}
, {S("C:foo"), S("/bar"), S("C:/bar")}
, {S("C:foo"), S("bar"), S("C:foo/bar")}
, {S("C:/foo"), S("bar"), S("C:/foo/bar")}
, {S("C:/foo"), S("/bar"), S("C:/bar")}
, {S("C:foo"), S("C:/bar"), S("C:/bar")}
, {S("C:foo"), S("C:bar"), S("C:foo/bar")}
, {S("C:/foo"), S("C:/bar"), S("C:/bar")}
, {S("C:/foo"), S("C:bar"), S("C:/foo/bar")}
, {S("C:foo"), S("c:/bar"), S("c:/bar")}
, {S("C:foo"), S("c:bar"), S("c:bar")}
, {S("C:/foo"), S("c:/bar"), S("c:/bar")}
, {S("C:/foo"), S("c:bar"), S("c:bar")}
, {S("C:/foo"), S("D:bar"), S("D:bar")}
#else
, {S("foo"), S("C:/bar"), S("foo/C:/bar")}
, {S("foo"), S("C:"), S("foo/C:")}
, {S("C:"), S(""), S("C:/")}
, {S("C:foo"), S("/bar"), S("/bar")}
, {S("C:foo"), S("bar"), S("C:foo/bar")}
, {S("C:/foo"), S("bar"), S("C:/foo/bar")}
, {S("C:/foo"), S("/bar"), S("/bar")}
, {S("C:foo"), S("C:/bar"), S("C:foo/C:/bar")}
, {S("C:foo"), S("C:bar"), S("C:foo/C:bar")}
, {S("C:/foo"), S("C:/bar"), S("C:/foo/C:/bar")}
, {S("C:/foo"), S("C:bar"), S("C:/foo/C:bar")}
, {S("C:foo"), S("c:/bar"), S("C:foo/c:/bar")}
, {S("C:foo"), S("c:bar"), S("C:foo/c:bar")}
, {S("C:/foo"), S("c:/bar"), S("C:/foo/c:/bar")}
, {S("C:/foo"), S("c:bar"), S("C:/foo/c:bar")}
, {S("C:/foo"), S("D:bar"), S("C:/foo/D:bar")}
#endif
};