From 70062c72cc7f0acef94a333247cc07df74cd3626 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Fri, 19 May 2017 11:41:16 +0200
Subject: Add file_empty(), extend path_entry() to return size

---
 libbutl/filesystem.ixx | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

(limited to 'libbutl/filesystem.ixx')

diff --git a/libbutl/filesystem.ixx b/libbutl/filesystem.ixx
index eb9984b..a6fae64 100644
--- a/libbutl/filesystem.ixx
+++ b/libbutl/filesystem.ixx
@@ -7,9 +7,25 @@ namespace butl
   inline bool
   dir_empty (const dir_path& d)
   {
+    // @@ Could 0 size be a valid and faster way?
+    //
     return dir_iterator (d) == dir_iterator ();
   }
 
+  inline bool
+  file_empty (const path& f)
+  {
+    auto p (path_entry (f));
+
+    if (p.first && p.second.type == entry_type::regular)
+      return p.second.size == 0;
+
+    throw_generic_error (
+      p.first
+      ? (p.second.type == entry_type::directory ? EISDIR : EINVAL)
+      : ENOENT);
+  }
+
   inline rmdir_status
   try_rmdir_r (const dir_path& p, bool ignore_error)
   {
-- 
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