Import GingerCal 1.0 source

tools/strip_method_params.py

@@ -0,0 +1,69 @@
+#!/usr/bin/env python3
+"""Removes MethodParameters attributes from .class files (in place).
+
+JDK 21+ javac always emits them for inner-class constructors, and older d8 releases
+crash on the nameless ones. They are only reflection metadata, so dropping them is safe.
+usage: strip_method_params.py file.class...
+"""
+import struct
+import sys
+
+
+def strip(path):
+    d = open(path, "rb").read()
+    n = struct.unpack(">H", d[8:10])[0]
+    p, i, utf8 = 10, 1, {}
+    while i < n:
+        t = d[p]
+        if t == 1:
+            ln = struct.unpack(">H", d[p + 1:p + 3])[0]
+            utf8[i] = d[p + 3:p + 3 + ln]
+            p += 3 + ln
+        elif t in (3, 4, 9, 10, 11, 12, 17, 18):
+            p += 5
+        elif t in (5, 6):
+            p += 9
+            i += 1
+        elif t in (7, 8, 16, 19, 20):
+            p += 3
+        elif t == 15:
+            p += 4
+        else:
+            raise ValueError("bad constant tag %d in %s" % (t, path))
+        i += 1
+    out = bytearray(d[:p])
+    p_access = p
+    ifaces = struct.unpack(">H", d[p + 6:p + 8])[0]
+    p += 8 + 2 * ifaces
+    out += d[p_access:p]
+
+    def members(p, drop):
+        count = struct.unpack(">H", d[p:p + 2])[0]
+        buf = bytearray(d[p:p + 2])
+        p += 2
+        for _ in range(count):
+            buf += d[p:p + 6]
+            acount = struct.unpack(">H", d[p + 6:p + 8])[0]
+            p += 8
+            kept = []
+            for _ in range(acount):
+                name, ln = struct.unpack(">HI", d[p:p + 6])
+                if utf8.get(name) != drop:
+                    kept.append(d[p:p + 6 + ln])
+                p += 6 + ln
+            buf += struct.pack(">H", len(kept)) + b"".join(kept)
+        return p, buf
+
+    p, fields = members(p, None)
+    out += fields
+    p, methods = members(p, b"MethodParameters")
+    out += methods
+    out += d[p:]
+    if bytes(out) != d:
+        open(path, "wb").write(bytes(out))
+        return 1
+    return 0
+
+
+changed = sum(strip(f) for f in sys.argv[1:])
+print("stripped MethodParameters from %d class files" % changed)