1 files changed, 80 insertions, 0 deletions
diff --git a/src/w_file.c b/src/w_file.c
new file mode 100644
index 00000000..eed68230
--- /dev/null
+++ b/src/w_file.c
@@ -0,0 +1,80 @@
+// Emacs style mode select   -*- C++ -*- 
+//-----------------------------------------------------------------------------
+//
+// Copyright(C) 1993-1996 Id Software, Inc.
+// Copyright(C) 2008 Simon Howard
+//
+// This program is free software; you can redistribute it and/or
+// modify it under the terms of the GNU General Public License
+// as published by the Free Software Foundation; either version 2
+// of the License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+// 02111-1307, USA.
+//
+// DESCRIPTION:
+//	WAD I/O functions.
+//
+//-----------------------------------------------------------------------------
+
+#include "config.h"
+
+#include "doomdef.h"
+#include "doomtype.h"
+
+#include "w_file.h"
+
+extern wad_file_class_t stdc_wad_file;
+
+#ifdef HAVE_MMAP
+extern wad_file_class_t posix_wad_file;
+#endif 
+
+static wad_file_class_t *wad_file_classes[] = 
+{
+#ifdef HAVE_MMAP
+    &posix_wad_file,
+#endif
+    &stdc_wad_file,
+};
+
+wad_file_t *W_OpenFile(char *path)
+{
+    wad_file_t *result;
+    int i;
+
+    // Try all classes in order until we find one that works
+
+    result = NULL;
+
+    for (i=0; i<arrlen(wad_file_classes); ++i) 
+    {
+        result = wad_file_classes[i]->OpenFile(path);
+
+        if (result != NULL)
+        {
+            break;
+        }
+    }
+
+    return result;
+}
+
+void W_CloseFile(wad_file_t *wad)
+{
+    wad->file_class->CloseFile(wad);
+}
+
+size_t W_Read(wad_file_t *wad, unsigned int offset,
+              void *buffer, size_t buffer_len)
+{
+    return wad->file_class->Read(wad, offset, buffer, buffer_len);
+}
+