CLI: Strict check if exclude path is file.

Initially I added logic that checked if excluded path was a file
we would accept. This works for source files, but when file with
"unknown" extension was given it was determined as a directory
name and ending slash was added. E.g. -ifile.h would end up
having ignored path file.h/.

This commit adds per-platform checks if the path points to the
file and if the file also exists.

cli/cmdlineparser.cpp

@@ -388,10 +388,9 @@ bool CmdLineParser::ParseFromArgs(int argc, const char* const argv[])
                 path = Path::simplifyPath(path.c_str());
                 path = Path::removeQuotationMarks(path);
 
-                // If not "known" filename extension then assume it is path
-                if (!FileLister::acceptFile(path))
+                if (!FileLister::fileExists(path) && FileLister::isDirectory(path))
                 {
-                    // If path doesn't end with / or \, add it
+                    // If directory name doesn't end with / or \, add it
                     if (path[path.length()-1] != '/')
                         path += '/';
                 }

cli/filelister.cpp

@@ -228,7 +228,13 @@ bool FileLister::isDirectory(const std::string &path)
     return (MyIsDirectory(path) != FALSE);
 }
 
-
+bool FileLister::fileExists(const std::string &path)
+{
+    if (PathFileExists(path.c_str()) == TRUE)
+        return true;
+    else
+        return false;
+}
 
 
 #else
@@ -335,4 +341,22 @@ bool FileLister::isDirectory(const std::string &path)
     return ret;
 }
 
+bool FileLister::fileExists(const std::string &path)
+{
+    struct stat statinfo;
+    int result = stat(path.c_str(), &statinfo);
+
+    if (result < 0)  // Todo: should check errno == ENOENT?
+    {
+        // File not found
+        return false;
+    }
+
+    // Check if file is regular file
+    if ((statinfo.st_mode & S_IFMT) == S_IFREG)
+        return true;
+
+    return false;
+}
+
 #endif

cli/filelister.h

@@ -57,6 +57,12 @@ public:
      */
     static bool isDirectory(const std::string &path);
 
+    /**
+      * @brief Check if the given path is a file and if it exists?
+      * @return true if path points to file and the file exists.
+      */
+    static bool fileExists(const std::string &path);
+
 #ifndef _WIN32
     static void recursiveAddFiles2(std::vector<std::string> &relative,
                                    std::vector<std::string> &absolute,