text_pointers.py - simple tool to look at text pointers

hg-commit-id: 3b7dcf150298

extras/text_pointers.py

@@ -0,0 +1,56 @@
+#!/usr/bin/python
+#author: Bryan Bishop <kanzure@gmail.com>
+#date: 2012-01-03
+#utilities for working with text pointers
+import extract_maps #rom, assert_rom, load_rom, calculate_pointer, load_map_pointers, read_all_map_headers, map_headers
+from pretty_map_headers import map_name_cleaner
+#import analyze_incbins #asm, offset_to_pointer, find_incbin_to_replace_for, split_incbin_line_into_three, generate_diff_insert, load_asm, isolate_incbins, process_incbins
+spacing = "    "
+
+def test_first_text_pointer_bytes(range=20): #30 for viridian city, 34 for cerulean city, 36 for celadon, 48 for fuchsia city, 50 for safron
+    """
+    does the first text pointer byte always point to (end address of text pointer list) + 1?
+
+    range determines how far is acceptable.
+    r=15 means 30 text pointers
+    """
+
+    for map_id in extract_maps.map_headers:
+        map = extract_maps.map_headers[map_id]
+        bank = int(map["bank"],16)
+        text_list_pointer = int(map["texts_pointer"], 16)
+
+        bad_names = ["FREEZE", "COPY: Cinnibar Mart", "COPY OF: Underground Tunnel Entrance (Route 6)", "COPY OF: Trashed House", "COPY OF: Underground Path Entrance (Route 7)"]
+        if map["name"] in bad_names: continue
+
+        #extract the bytes making up the first text pointer
+        pointer_byte1 = ord(extract_maps.rom[text_list_pointer])
+        pointer_byte2 = ord(extract_maps.rom[text_list_pointer+1])
+
+        #swap the bytes
+        temp = pointer_byte1
+        pointer_byte1 = pointer_byte2
+        pointer_byte2 = temp
+        del temp
+
+        #combine these into a single pointer
+        partial_pointer = (pointer_byte2 + (pointer_byte1 << 8))
+
+        #get the full pointer
+        first_text_pointer = extract_maps.calculate_pointer(partial_pointer, bank)
+
+        #if (first_text_pointer <= (text_list_pointer+range)):
+        print "map " + map["name"] + " (" + str(map["id"]) + ")"
+        print spacing + "text_pointer (list) = " + hex(text_list_pointer)
+        print spacing + "first_text_pointer (first text) = " + hex(first_text_pointer)
+        print spacing + "difference = " + str(first_text_pointer - text_list_pointer)
+        #return False
+
+    return True
+
+if __name__ == "__main__":
+    extract_maps.load_rom()
+    extract_maps.load_map_pointers()
+    extract_maps.read_all_map_headers()
+
+    print test_first_text_pointer_bytes()