Change how 32bit hashes are calculated to prevent collisions

2025-12-08 18:24:55 +00:00 · 2017-02-13 13:27:43 -08:00
parent 86f9f62ef6
commit d67d54ddd0
2 changed files with 3 additions and 2 deletions
--- a/hecl/blender/hecl_blendershell.py
+++ b/hecl/blender/hecl_blendershell.py
@@ -51,7 +51,8 @@ class PathHasher:
        writepipestr(path.encode())
        read_str = readpipestr()
        if len(read_str) >= 16:
-            return int(read_str[0:16], 16) & 0xffffffff
+            hash = int(read_str[0:16], 16)
+            return (hash & 0xffffffff) ^ ((hash >> 32) & 0xffffffff)
        return 0

    def hashpath64(self, path):