added g_create_dir, g_directory_exist, g_remove_dir, and g_chmod

common/os_calls.c

@@ -648,6 +648,18 @@ g_set_file_rights(char* filename, int read, int write)
 #endif
 }
 
+/*****************************************************************************/
+/* returns error */
+int
+g_chmod(char* filename, int flags)
+{
+#if defined(_WIN32)
+  return 0;
+#else
+  return chmod(filename, flags);
+#endif
+}
+
 /*****************************************************************************/
 /* returns error, always zero */
 int
@@ -702,12 +714,58 @@ int
 g_file_exist(char* filename)
 {
 #if defined(_WIN32)
-  return 0; // use FindFirstFile();
+  return 0; // use FileAge(filename) <> -1
 #else
   return access(filename, F_OK) == 0;
 #endif
 }
 
+/*****************************************************************************/
+/* returns boolean, non zero if the directory exists */
+int
+g_directory_exist(char* dirname)
+{
+#if defined(_WIN32)
+  return 0; // use GetFileAttributes and check return value
+            // is not -1 and FILE_ATTRIBUT_DIRECTORY bit is set
+#else
+  struct stat st;
+
+  if (stat(dirname, &st) == 0)
+  {
+    return S_ISDIR(st.st_mode);
+  }
+  else
+  {
+    return 0;
+  }
+#endif
+}
+
+/*****************************************************************************/
+/* returns boolean */
+int
+g_create_dir(char* dirname)
+{
+#if defined(_WIN32)
+  return CreateDirectory(dirname, 0); // test this
+#else
+  return mkdir(dirname, (mode_t)-1) == 0;
+#endif
+}
+
+/*****************************************************************************/
+/* returns boolean */
+int
+g_remove_dir(char* dirname)
+{
+#if defined(_WIN32)
+  return RemoveDirectory(dirname); // test this
+#else
+  return rmdir(dirname) == 0;
+#endif
+}
+
 /*****************************************************************************/
 /* returns non zero if the file was deleted */
 int

common/os_calls.h

@@ -100,6 +100,8 @@ g_file_lock(int fd, int start, int len);
 int
 g_set_file_rights(char* filename, int read, int write);
 int
+g_chmod(char* filename, int flags);
+int
 g_mkdir(char* dirname);
 char*
 g_get_current_dir(char* dirname, int maxlen);
@@ -108,6 +110,12 @@ g_set_current_dir(char* dirname);
 int
 g_file_exist(char* filename);
 int
+g_directory_exist(char* dirname);
+int
+g_create_dir(char* dirname);
+int
+g_remove_dir(char* dirname);
+int
 g_file_delete(char* filename);
 int
 g_strlen(char* text);