Support/FileSystem: Implement bool equivalent(file_status A, file_status B);
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@146364 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Support/Unix/PathV2.inc b/lib/Support/Unix/PathV2.inc
index 41ed49f..2a21c14 100644
--- a/lib/Support/Unix/PathV2.inc
+++ b/lib/Support/Unix/PathV2.inc
@@ -273,28 +273,17 @@
return success;
}
+bool equivalent(file_status A, file_status B) {
+ assert(status_known(A) && status_known(B));
+ return A.st_dev == B.st_dev &&
+ A.st_ino == B.st_ino;
+}
+
error_code equivalent(const Twine &A, const Twine &B, bool &result) {
- // Get arguments.
- SmallString<128> a_storage;
- SmallString<128> b_storage;
- StringRef a = A.toNullTerminatedStringRef(a_storage);
- StringRef b = B.toNullTerminatedStringRef(b_storage);
-
- struct stat stat_a, stat_b;
- int error_b = ::stat(b.begin(), &stat_b);
- int error_a = ::stat(a.begin(), &stat_a);
-
- // If both are invalid, it's an error. If only one is, the result is false.
- if (error_a != 0 || error_b != 0) {
- if (error_a == error_b)
- return error_code(errno, system_category());
- result = false;
- } else {
- result =
- stat_a.st_dev == stat_b.st_dev &&
- stat_a.st_ino == stat_b.st_ino;
- }
-
+ file_status fsA, fsB;
+ if (error_code ec = status(A, fsA)) return ec;
+ if (error_code ec = status(B, fsB)) return ec;
+ result = equivalent(fsA, fsB);
return success;
}
@@ -341,6 +330,9 @@
else
result = file_status(file_type::type_unknown);
+ result.st_dev = status.st_dev;
+ result.st_ino = status.st_ino;
+
return success;
}