Use status to implement file_size.

The status function is already using a syscall that returns the file size.
Remember it and implement file_size as a simple wrapper.

No functionally change, but clients that already use status now can avoid
calling file_size.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186016 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 1 insertions, 35 deletions

diff --git a/lib/Support/Unix/Path.inc b/lib/Support/Unix/Path.inc
index 433d187..83879ff 100644
--- a/lib/Support/Unix/Path.inc
+++ b/lib/Support/Unix/Path.inc
@@ -529,20 +529,6 @@ error_code equivalent(const Twine &A, const Twine &B, bool &result) {
   return error_code::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 make_error_code(errc::operation_not_permitted);
-
-  result = status.st_size;
-  return error_code::success();
-}
-
 error_code getUniqueID(const Twine Path, uint64_t &Result) {
   SmallString<128> Storage;
   StringRef P = Path.toNullTerminatedStringRef(Storage);
@@ -591,6 +577,7 @@ error_code status(const Twine &path, file_status &result) {
   result.fs_st_mtime = status.st_mtime;
   result.fs_st_uid = status.st_uid;
   result.fs_st_gid = status.st_gid;
+  result.fs_st_size = status.st_size;
 
   return error_code::success();
 }
diff --git a/lib/Support/Windows/Path.inc b/lib/Support/Windows/Path.inc
index 7359994..ed93f3d 100644
--- a/lib/Support/Windows/Path.inc
+++ b/lib/Support/Windows/Path.inc
@@ -555,27 +555,6 @@ error_code equivalent(const Twine &A, const Twine &B, bool &result) {
   return error_code::success();
 }
 
-error_code file_size(const Twine &path, uint64_t &result) {
-  SmallString<128> path_storage;
-  SmallVector<wchar_t, 128> path_utf16;
-
-  if (error_code ec = UTF8ToUTF16(path.toStringRef(path_storage),
-                                  path_utf16))
-    return ec;
-
-  WIN32_FILE_ATTRIBUTE_DATA FileData;
-  if (!::GetFileAttributesExW(path_utf16.begin(),
-                              ::GetFileExInfoStandard,
-                              &FileData))
-    return windows_error(::GetLastError());
-
-  result =
-    (uint64_t(FileData.nFileSizeHigh) << (sizeof(FileData.nFileSizeLow) * 8))
-    + FileData.nFileSizeLow;
-
-  return error_code::success();
-}
-
 error_code getUniqueID(const Twine Path, uint64_t &Result) {
   file_status Status;
   if (error_code E = status(Path, Status))