1 files changed, 52 insertions, 0 deletions
diff --git a/scripts/nids-check-digest.py b/scripts/nids-check-digest.py
new file mode 100644
index 0000000..47a71d2
--- /dev/null
+++ b/scripts/nids-check-digest.py
@@ -0,0 +1,52 @@
+#!/usr/bin/env python3
+
+#
+#   Copyright (C) 2021 Reiko Asakura. All Rights Reserved.
+#
+#   Vita Development Suite Libraries
+#
+
+import sys
+from hashlib import sha1
+from pathlib import Path
+
+from yaml import load
+try:
+	from yaml import CLoader as Loader
+except ImportError:
+	from yaml import SafeLoader as Loader
+
+def name2nid(n, s):
+	digest = sha1((n + s).encode('utf-8')).digest()
+	return int.from_bytes(digest[:4], byteorder='little')
+
+def print_ex_expect(exports, suffix):
+	for name, nid in exports.items():
+		computed_nid = name2nid(name, suffix)
+		if nid != computed_nid:
+			print(f'  {nid:08X} ≠ {computed_nid:08X} {name}')
+
+def print_lib_expect(libname, lib, suffix):
+	if lib['nid'] == name2nid(libname, suffix):
+		print(f'{libname} [{suffix}]')
+		if 'functions' in lib:
+			print_ex_expect(lib['functions'], suffix)
+		if 'variables' in lib:
+			print_ex_expect(lib['variables'], suffix)
+		return 1
+	return 0
+
+def check_digest(d):
+	for c in d.iterdir():
+		if c.is_file():
+			for modname, mod in load(c.read_bytes(), Loader=Loader)['modules'].items():
+				for libname, lib in mod['libraries'].items():
+					if not print_lib_expect(libname, lib, ''):
+						if not print_lib_expect(libname, lib, libname):
+							print_lib_expect(libname, lib, modname)
+		elif c.is_dir():
+			check_digest(c)
+		else:
+			sys.exit("Unexpected file type")
+
+check_digest(Path('nids'))