Change SGPath::exists to use stat(), fix '.' and '..' handling on Windows, add simgear::Dir version of exists().

simgear/misc/sg_dir.cxx

@@ -80,6 +80,12 @@ PathList Dir::children(int types, const std::string& nameFilter) const
     }
     
     if (fData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) {
+	  if (types & NO_DOT_OR_DOTDOT) {
+		if (!strcmp(fData.cFileName,".") || !strcmp(fData.cFileName,"..")) {
+		  continue;
+		}
+	  }
+
       if (!(types & TYPE_DIR)) {
         continue;
       }
@@ -164,6 +170,27 @@ PathList Dir::children(int types, const std::string& nameFilter) const
   return result;
 }
 
+bool Dir::exists() const
+{
+#ifdef _WIN32
+  struct _stat buf ;
+
+  if (_stat (_path.c_str(), &buf ) < 0) {
+    return false;
+  }
+  
+  return ((S_IFDIR & buf.st_mode ) !=0);
+#else
+  struct stat buf ;
+
+  if (stat(_path.c_str(), &buf ) < 0) {
+    return false ;
+  }
+  
+  return ((S_ISDIR(buf.st_mode )) != 0);
+#endif
+}
+
 SGPath Dir::file(const std::string& name) const
 {
   SGPath childPath = _path;

simgear/misc/sg_dir.hxx

@@ -52,6 +52,11 @@ namespace simgear
     PathList children(int types = 0, const std::string& nameGlob = "") const;
     
     SGPath file(const std::string& name) const;
+    
+    /**
+     * Check that the directory at the path exists (and is a directory!)
+     */
+    bool exists() const;
   private:
     mutable SGPath _path;
   };

simgear/misc/sg_path.cxx

@@ -28,7 +28,6 @@
 #include <simgear/debug/logstream.hxx>
 #include <stdio.h>
 #include <sys/stat.h>
-#include <sys/stat.h>
 #ifdef _WIN32
 #  include <direct.h>
 #endif
@@ -49,9 +48,7 @@ static const char sgSearchPathSep = ':';
 #endif
 
 
-// If Unix, replace all ":" with "/".  If MacOS, replace all "/" with
+// If Unix, replace all ":" with "/".  In windoze, allow the
-// ":" it should go without saying that neither of these characters
-// should be used in file or directory names.  In windoze, allow the
 // second character to be a ":" for things like c:\foo\bar
 
 void
@@ -172,13 +169,25 @@ string SGPath::extension() const {
     }
 }
 
-bool SGPath::exists() const {
+bool SGPath::exists() const
-    FILE* fp = fopen( path.c_str(), "r");
+{
-    if (fp == 0) {
+#ifdef _WIN32
-	return false;
+  struct _stat buf;
-    }
+
-    fclose(fp);
+  if (_stat(path.c_str(), &buf) < 0) {
-    return true;
+    return false;
+  }
+  
+  return true;
+#else
+  struct stat buf ;
+
+  if (stat(path.c_str(), &buf) < 0) {
+    return false ;
+  }
+  
+  return true;
+#endif
 }
 
 #ifdef _WIN32