From c0b5bc5a394ec4c6b694208505fee954aa44c490 Mon Sep 17 00:00:00 2001
From: Elliot Nunn <elliotnunn@me.com>
Date: Thu, 7 Jun 2018 08:26:39 +0800
Subject: [PATCH] Fix up and commit RezROM

---
 DumpRomResources.py | 85 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 85 insertions(+)
 create mode 100755 DumpRomResources.py

diff --git a/DumpRomResources.py b/DumpRomResources.py
new file mode 100755
index 0000000..e449c6b
--- /dev/null
+++ b/DumpRomResources.py
@@ -0,0 +1,85 @@
+#!/usr/bin/env python3
+
+
+import os
+import struct
+import sys
+
+
+COMBO_FIELDS = {
+    0x40: 'AppleTalk1',
+    0x20: 'AppleTalk2',
+    0x30: 'AppleTalk2_NetBoot_FPU',
+    0x08: 'AppleTalk2_NetBoot_NoFPU',
+    0x10: 'NetBoot',
+    0x78: 'AllCombos',
+}
+
+
+def pad_offset(offset, align):
+    (offset + align - 1) & ~(align - 1)
+
+
+class Rsrc:
+    def __init__(self, rom_bin, struct_offset):
+        self.struct_offset = struct_offset
+
+        rsrc_s_fmt = '> B 7x L L 4s h c 256p' # Struct actually padded to 16b to fit pstring
+        rsrc_s_len = struct.calcsize(rsrc_s_fmt)
+        rsrc_s = rom_bin[self.struct_offset : self.struct_offset + rsrc_s_len]
+        rsrc_s_tuple = struct.unpack(rsrc_s_fmt, rsrc_s)
+
+        (self.combo_field,
+        self.next_offset, self.data_offset,
+        self.type, self.id,
+        attrs, self.name)        = rsrc_s_tuple
+
+        self.combo_field = COMBO_FIELDS.get(self.combo_field, 'UnknownComboField0x%X'%self.combo_field)
+
+        rsrc_s_len_actual = pad_offset(rsrc_s_len - 256 + len(self.name), 16)
+
+        mm_header_fmt = '> L L L'
+        mm_header_len = struct.calcsize(mm_header_fmt)
+        mm_header = rom_bin[self.data_offset - mm_header_len : self.data_offset]
+        mm_header_tuple = struct.unpack(mm_header_fmt, mm_header)
+
+        (mm_attrs, block_len, mm_bogus_ptr_ptr) = mm_header_tuple
+
+        self.data = rom_bin[self.data_offset : self.data_offset + block_len - mm_header_len]
+
+
+if __name__ == '__main__':
+    try:
+        _, src, dest = sys.argv
+    except ValueError:
+        print('USAGE: %s SRC.ROM DEST-DIR' % (sys.argv[0]))
+        exit(1)
+
+    with open(src, 'rb') as f:
+        rom_bin = f.read()
+
+    os.makedirs(dest)
+
+    (map_offset,) = struct.unpack('>L', rom_bin[0x1A : 0x1A + 4])
+
+    map_s_fmt = '>Lbbhh'
+    map_s_len = struct.calcsize(map_s_fmt)
+    map_s = rom_bin[map_offset:map_offset + map_s_len]
+    (offsetToFirst, maxValidIndex, comboFieldSize, comboVersion, headerSize) = struct.unpack(map_s_fmt, map_s)
+
+    next_offset = offsetToFirst
+    idx = 0
+    while next_offset != 0:
+        r = Rsrc(rom_bin, next_offset)
+
+        fname = '%03d %s %d' % (idx, r.type.decode('ascii'), r.id)
+        if r.name:
+            fname += ' "%s"' % r.name.decode('ascii')
+        if r.combo_field != 'AllCombos':
+            fname += ' (%s)' % r.combo_field
+
+        with open(os.path.join(dest, fname), 'wb') as f:
+            f.write(r.data)
+
+        next_offset = r.next_offset
+        idx += 1