Support/FileSystem: Add file_size implementation.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120867 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 14 insertions, 0 deletions

diff --git a/lib/Support/Unix/PathV2.inc b/lib/Support/Unix/PathV2.inc
index b18023cde7..d8575bf4e6 100644
--- a/lib/Support/Unix/PathV2.inc
+++ b/lib/Support/Unix/PathV2.inc
@@ -263,6 +263,20 @@ error_code equivalent(const Twine &A, const Twine &B, bool &result) {
   return make_error_code(errc::success);
 }
 
+error_code file_size(const Twine &path, uint64_t &result) {
+  SmallString<128> path_storage;
+  StringRef p = path.toNullTerminatedStringRef(path_storage);
+
+  struct stat status;
+  if (::stat(p.begin(), &status) == -1)
+    return error_code(errno, system_category());
+  if (!S_ISREG(status.st_mode))
+    return error_code(EPERM, system_category());
+
+  result = status.st_size;
+  return make_error_code(errc::success);
+}
+
 error_code unique_file(const Twine &model, int &result_fd,
                              SmallVectorImpl<char> &result_path) {
   SmallString<128> Model;