Add dir_empty() test

3 files changed, 19 insertions, 7 deletions

diff --git a/butl/filesystem b/butl/filesystem
index 118fa01..41b9266 100644
--- a/butl/filesystem
+++ b/butl/filesystem
@@ -32,17 +32,23 @@
 
 namespace butl
 {
+  // Return true if the path is to an existing regular file. Note that
+  // this function resolves symlinks.
+  //
+  LIBBUTL_EXPORT bool
+  file_exists (const path&);
+
   // Return true if the path is to an existing directory. Note that
   // this function resolves symlinks.
   //
   LIBBUTL_EXPORT bool
   dir_exists (const path&);
 
-  // Return true if the path is to an existing regular file. Note that
-  // this function resolves symlinks.
+  // Return true if the directory is empty. Note that the path must exist
+  // and be a directory.
   //
   LIBBUTL_EXPORT bool
-  file_exists (const path&);
+  dir_empty (const dir_path&);
 
   // Try to create a directory unless it already exists. If you expect
   // the directory to exist and performance is important, then you
diff --git a/butl/filesystem.cxx b/butl/filesystem.cxx
index e5819e2..a807f4c 100644
--- a/butl/filesystem.cxx
+++ b/butl/filesystem.cxx
@@ -35,7 +35,7 @@ using namespace std;
 namespace butl
 {
   bool
-  dir_exists (const path& p)
+  file_exists (const path& p)
   {
 #ifndef _WIN32
     struct stat s;
@@ -51,11 +51,11 @@ namespace butl
         throw system_error (errno, system_category ());
     }
 
-    return S_ISDIR (s.st_mode);
+    return S_ISREG (s.st_mode);
   }
 
   bool
-  file_exists (const path& p)
+  dir_exists (const path& p)
   {
 #ifndef _WIN32
     struct stat s;
@@ -71,7 +71,7 @@ namespace butl
         throw system_error (errno, system_category ());
     }
 
-    return S_ISREG (s.st_mode);
+    return S_ISDIR (s.st_mode);
   }
 
   mkdir_status
diff --git a/butl/filesystem.ixx b/butl/filesystem.ixx
index af1125e..6062c38 100644
--- a/butl/filesystem.ixx
+++ b/butl/filesystem.ixx
@@ -4,6 +4,12 @@
 
 namespace butl
 {
+  inline bool
+  dir_empty (const dir_path& d)
+  {
+    return dir_iterator (d) == dir_iterator ();
+  }
+
   inline rmdir_status
   try_rmdir_r (const dir_path& p, bool ignore_error)
   {