_ Git - ldk-java/blob - genbindings.py

   1 #!/usr/bin/env python3
   2 import sys, re
   3
   4 if len(sys.argv) != 7:
   5     print("USAGE: /path/to/lightning.h /path/to/bindings/output /path/to/bindings/ /path/to/bindings/output.c debug lang")
   6     sys.exit(1)
   7
   8 if sys.argv[5] == "false":
   9     DEBUG = False
  10 elif sys.argv[5] == "true":
  11     DEBUG = True
  12 else:
  13     print("debug should be true or false and indicates whether to track allocations and ensure we don't leak")
  14     sys.exit(1)
  15
  16 if sys.argv[6] == "java":
  17     from java_strings import Consts
  18 elif sys.argv[6] == "typescript":
  19     from typescript_strings import Consts
  20 else:
  21     print("Only java or typescript can be set for lang")
  22     sys.exit(1)
  23 consts = Consts(DEBUG)
  24
  25 from bindingstypes import *
  26
  27 c_file = ""
  28 def write_c(s):
  29     global c_file
  30     c_file += s
  31
  32 def camel_to_snake(s):
  33     # Convert camel case to snake case, in a way that appears to match cbindgen
  34     con = "_"
  35     ret = ""
  36     lastchar = ""
  37     lastund = False
  38     for char in s:
  39         if lastchar.isupper():
  40             if not char.isupper() and not lastund:
  41                 ret = ret + "_"
  42                 lastund = True
  43             else:
  44                 lastund = False
  45             ret = ret + lastchar.lower()
  46         else:
  47             ret = ret + lastchar
  48             if char.isupper() and not lastund:
  49                 ret = ret + "_"
  50                 lastund = True
  51             else:
  52                 lastund = False
  53         lastchar = char
  54         if char.isnumeric():
  55             lastund = True
  56     return (ret + lastchar.lower()).strip("_")
  57
  58 unitary_enums = set()
  59 complex_enums = set()
  60 opaque_structs = set()
  61 trait_structs = set()
  62 result_types = set()
  63 tuple_types = {}
  64
  65 var_is_arr_regex = re.compile("\(\*([A-za-z0-9_]*)\)\[([a-z0-9]*)\]")
  66 var_ty_regex = re.compile("([A-za-z_0-9]*)(.*)")
  67 java_c_types_none_allowed = True # Unset when we do the real pass that populates the above sets
  68 def java_c_types(fn_arg, ret_arr_len):
  69     fn_arg = fn_arg.strip()
  70     if fn_arg.startswith("MUST_USE_RES "):
  71         fn_arg = fn_arg[13:]
  72     is_const = False
  73     if fn_arg.startswith("const "):
  74         fn_arg = fn_arg[6:]
  75         is_const = True
  76     if fn_arg.startswith("struct "):
  77         fn_arg = fn_arg[7:]
  78     if fn_arg.startswith("enum "):
  79         fn_arg = fn_arg[5:]
  80     fn_arg = fn_arg.replace("NONNULL_PTR", "")
  81
  82     is_ptr = False
  83     take_by_ptr = False
  84     rust_obj = None
  85     arr_access = None
  86     java_hu_ty = None
  87     if fn_arg.startswith("LDKThirtyTwoBytes"):
  88         fn_arg = "uint8_t (*" + fn_arg[18:] + ")[32]"
  89         assert var_is_arr_regex.match(fn_arg[8:])
  90         rust_obj = "LDKThirtyTwoBytes"
  91         arr_access = "data"
  92     elif fn_arg.startswith("LDKPublicKey"):
  93         fn_arg = "uint8_t (*" + fn_arg[13:] + ")[33]"
  94         assert var_is_arr_regex.match(fn_arg[8:])
  95         rust_obj = "LDKPublicKey"
  96         arr_access = "compressed_form"
  97     elif fn_arg.startswith("LDKSecretKey"):
  98         fn_arg = "uint8_t (*" + fn_arg[13:] + ")[32]"
  99         assert var_is_arr_regex.match(fn_arg[8:])
 100         rust_obj = "LDKSecretKey"
 101         arr_access = "bytes"
 102     elif fn_arg.startswith("LDKSignature"):
 103         fn_arg = "uint8_t (*" + fn_arg[13:] + ")[64]"
 104         assert var_is_arr_regex.match(fn_arg[8:])
 105         rust_obj = "LDKSignature"
 106         arr_access = "compact_form"
 107     elif fn_arg.startswith("LDKThreeBytes"):
 108         fn_arg = "uint8_t (*" + fn_arg[14:] + ")[3]"
 109         assert var_is_arr_regex.match(fn_arg[8:])
 110         rust_obj = "LDKThreeBytes"
 111         arr_access = "data"
 112     elif fn_arg.startswith("LDKFourBytes"):
 113         fn_arg = "uint8_t (*" + fn_arg[13:] + ")[4]"
 114         assert var_is_arr_regex.match(fn_arg[8:])
 115         rust_obj = "LDKFourBytes"
 116         arr_access = "data"
 117     elif fn_arg.startswith("LDKSixteenBytes"):
 118         fn_arg = "uint8_t (*" + fn_arg[16:] + ")[16]"
 119         assert var_is_arr_regex.match(fn_arg[8:])
 120         rust_obj = "LDKSixteenBytes"
 121         arr_access = "data"
 122     elif fn_arg.startswith("LDKTenBytes"):
 123         fn_arg = "uint8_t (*" + fn_arg[12:] + ")[10]"
 124         assert var_is_arr_regex.match(fn_arg[8:])
 125         rust_obj = "LDKTenBytes"
 126         arr_access = "data"
 127     elif fn_arg.startswith("LDKu8slice"):
 128         fn_arg = "uint8_t (*" + fn_arg[11:] + ")[datalen]"
 129         assert var_is_arr_regex.match(fn_arg[8:])
 130         rust_obj = "LDKu8slice"
 131         arr_access = "data"
 132     elif fn_arg.startswith("LDKCVec_u8Z"):
 133         fn_arg = "uint8_t (*" + fn_arg[12:] + ")[datalen]"
 134         rust_obj = "LDKCVec_u8Z"
 135         assert var_is_arr_regex.match(fn_arg[8:])
 136         arr_access = "data"
 137     elif fn_arg.startswith("LDKTransaction"):
 138         fn_arg = "uint8_t (*" + fn_arg[15:] + ")[datalen]"
 139         rust_obj = "LDKTransaction"
 140         assert var_is_arr_regex.match(fn_arg[8:])
 141         arr_access = "data"
 142     elif fn_arg.startswith("LDKCVec_"):
 143         is_ptr = False
 144         if "*" in fn_arg:
 145             fn_arg = fn_arg.replace("*", "")
 146             is_ptr = True
 147
 148         tyn = fn_arg[8:].split(" ")
 149         assert tyn[0].endswith("Z")
 150         if tyn[0] == "u64Z":
 151             new_arg = "uint64_t"
 152         else:
 153             new_arg = "LDK" + tyn[0][:-1]
 154         for a in tyn[1:]:
 155             new_arg = new_arg + " " + a
 156         res = java_c_types(new_arg, ret_arr_len)
 157         if res is None:
 158             assert java_c_types_none_allowed
 159             return None
 160         if is_ptr:
 161             res.pass_by_ref = True
 162         if res.is_native_primitive or res.passed_as_ptr:
 163             return TypeInfo(rust_obj=fn_arg.split(" ")[0], java_ty=res.java_ty + "[]", java_hu_ty=res.java_hu_ty + "[]",
 164                 java_fn_ty_arg="[" + res.java_fn_ty_arg, c_ty=res.c_ty + "Array", passed_as_ptr=False, is_ptr=is_ptr, is_const=is_const,
 165                 var_name=res.var_name, arr_len="datalen", arr_access="data", subty=res, is_native_primitive=False)
 166         else:
 167             return TypeInfo(rust_obj=fn_arg.split(" ")[0], java_ty=res.java_ty + "[]", java_hu_ty=res.java_hu_ty + "[]",
 168                 java_fn_ty_arg="[" + res.java_fn_ty_arg, c_ty=consts.ptr_arr, passed_as_ptr=False, is_ptr=is_ptr, is_const=is_const,
 169                 var_name=res.var_name, arr_len="datalen", arr_access="data", subty=res, is_native_primitive=False)
 170
 171     is_primitive = False
 172     arr_len = None
 173     if fn_arg.startswith("void"):
 174         java_ty = "void"
 175         c_ty = "void"
 176         fn_ty_arg = "V"
 177         fn_arg = fn_arg[4:].strip()
 178         is_primitive = True
 179     elif fn_arg.startswith("bool"):
 180         java_ty = "boolean"
 181         c_ty = "jboolean"
 182         fn_ty_arg = "Z"
 183         fn_arg = fn_arg[4:].strip()
 184         is_primitive = True
 185     elif fn_arg.startswith("uint8_t"):
 186         java_ty = "byte"
 187         c_ty = "int8_t"
 188         fn_ty_arg = "B"
 189         fn_arg = fn_arg[7:].strip()
 190         is_primitive = True
 191     elif fn_arg.startswith("uint16_t"):
 192         java_ty = "short"
 193         c_ty = "jshort"
 194         fn_ty_arg = "S"
 195         fn_arg = fn_arg[8:].strip()
 196         is_primitive = True
 197     elif fn_arg.startswith("uint32_t"):
 198         java_ty = "int"
 199         c_ty = "int32_t"
 200         fn_ty_arg = "I"
 201         fn_arg = fn_arg[8:].strip()
 202         is_primitive = True
 203     elif fn_arg.startswith("uint64_t") or fn_arg.startswith("uintptr_t"):
 204         # TODO: uintptr_t is arch-dependent :(
 205         java_ty = "long"
 206         c_ty = "int64_t"
 207         fn_ty_arg = "J"
 208         if fn_arg.startswith("uint64_t"):
 209             fn_arg = fn_arg[8:].strip()
 210         else:
 211             fn_arg = fn_arg[9:].strip()
 212         is_primitive = True
 213     elif is_const and fn_arg.startswith("char *"):
 214         java_ty = "String"
 215         c_ty = "const char*"
 216         fn_ty_arg = "Ljava/lang/String;"
 217         fn_arg = fn_arg[6:].strip()
 218     elif fn_arg.startswith("LDKStr"):
 219         java_ty = "String"
 220         c_ty = "jstring"
 221         fn_ty_arg = "Ljava/lang/String;"
 222         fn_arg = fn_arg[6:].strip()
 223         arr_access = "chars"
 224         arr_len = "len"
 225     else:
 226         ma = var_ty_regex.match(fn_arg)
 227         if ma.group(1).strip() in unitary_enums:
 228             java_ty = ma.group(1).strip()
 229             c_ty = consts.result_c_ty
 230             fn_ty_arg = "Lorg/ldk/enums/" + ma.group(1).strip() + ";"
 231             fn_arg = ma.group(2).strip()
 232             rust_obj = ma.group(1).strip()
 233         elif ma.group(1).strip().startswith("LDKC2Tuple"):
 234             c_ty = consts.ptr_c_ty
 235             java_ty = consts.ptr_native_ty
 236             java_hu_ty = "TwoTuple<"
 237             if not ma.group(1).strip() in tuple_types:
 238                 assert java_c_types_none_allowed
 239                 return None
 240             for idx, ty_info in enumerate(tuple_types[ma.group(1).strip()][0]):
 241                 if idx != 0:
 242                     java_hu_ty = java_hu_ty + ", "
 243                 if ty_info.is_native_primitive:
 244                     if ty_info.java_hu_ty == "int":
 245                         java_hu_ty = java_hu_ty + "Integer" # Java concrete integer type is Integer, not Int
 246                     else:
 247                         java_hu_ty = java_hu_ty + ty_info.java_hu_ty.title() # If we're a primitive, capitalize the first letter
 248                 else:
 249                     java_hu_ty = java_hu_ty + ty_info.java_hu_ty
 250             java_hu_ty = java_hu_ty + ">"
 251             fn_ty_arg = "J"
 252             fn_arg = ma.group(2).strip()
 253             rust_obj = ma.group(1).strip()
 254             take_by_ptr = True
 255         elif ma.group(1).strip().startswith("LDKC3Tuple"):
 256             c_ty = consts.ptr_c_ty
 257             java_ty = consts.ptr_native_ty
 258             java_hu_ty = "ThreeTuple<"
 259             if not ma.group(1).strip() in tuple_types:
 260                 assert java_c_types_none_allowed
 261                 return None
 262             for idx, ty_info in enumerate(tuple_types[ma.group(1).strip()][0]):
 263                 if idx != 0:
 264                     java_hu_ty = java_hu_ty + ", "
 265                 if ty_info.is_native_primitive:
 266                     if ty_info.java_hu_ty == "int":
 267                         java_hu_ty = java_hu_ty + "Integer" # Java concrete integer type is Integer, not Int
 268                     else:
 269                         java_hu_ty = java_hu_ty + ty_info.java_hu_ty.title() # If we're a primitive, capitalize the first letter
 270                 else:
 271                     java_hu_ty = java_hu_ty + ty_info.java_hu_ty
 272             java_hu_ty = java_hu_ty + ">"
 273             fn_ty_arg = "J"
 274             fn_arg = ma.group(2).strip()
 275             rust_obj = ma.group(1).strip()
 276             take_by_ptr = True
 277         else:
 278             c_ty = consts.ptr_c_ty
 279             java_ty = consts.ptr_native_ty
 280             java_hu_ty = ma.group(1).strip().replace("LDKCResult", "Result").replace("LDK", "")
 281             fn_ty_arg = "J"
 282             fn_arg = ma.group(2).strip()
 283             rust_obj = ma.group(1).strip()
 284             take_by_ptr = True
 285
 286     if fn_arg.startswith(" *") or fn_arg.startswith("*"):
 287         fn_arg = fn_arg.replace("*", "").strip()
 288         is_ptr = True
 289         c_ty = consts.ptr_c_ty
 290         java_ty = consts.ptr_native_ty
 291         fn_ty_arg = "J"
 292         is_primitive = False
 293
 294     var_is_arr = var_is_arr_regex.match(fn_arg)
 295     if var_is_arr is not None or ret_arr_len is not None:
 296         assert(not take_by_ptr)
 297         assert(not is_ptr)
 298         java_ty = java_ty + "[]"
 299         c_ty = c_ty + "Array"
 300         if var_is_arr is not None:
 301             if var_is_arr.group(1) == "":
 302                 return TypeInfo(rust_obj=rust_obj, java_ty=java_ty, java_hu_ty=java_ty, java_fn_ty_arg="[" + fn_ty_arg, c_ty=c_ty, is_const=is_const,
 303                     passed_as_ptr=False, is_ptr=False, var_name="arg", arr_len=var_is_arr.group(2), arr_access=arr_access, is_native_primitive=False)
 304             return TypeInfo(rust_obj=rust_obj, java_ty=java_ty, java_hu_ty=java_ty, java_fn_ty_arg="[" + fn_ty_arg, c_ty=c_ty, is_const=is_const,
 305                 passed_as_ptr=False, is_ptr=False, var_name=var_is_arr.group(1), arr_len=var_is_arr.group(2), arr_access=arr_access, is_native_primitive=False)
 306
 307     if java_hu_ty is None:
 308         java_hu_ty = java_ty
 309     return TypeInfo(rust_obj=rust_obj, java_ty=java_ty, java_hu_ty=java_hu_ty, java_fn_ty_arg=fn_ty_arg, c_ty=c_ty, passed_as_ptr=is_ptr or take_by_ptr,
 310         is_const=is_const, is_ptr=is_ptr, var_name=fn_arg, arr_len=arr_len, arr_access=arr_access, is_native_primitive=is_primitive)
 311
 312 fn_ptr_regex = re.compile("^extern const ([A-Za-z_0-9\* ]*) \(\*(.*)\)\((.*)\);$")
 313 fn_ret_arr_regex = re.compile("(.*) \(\*(.*)\((.*)\)\)\[([0-9]*)\];$")
 314 reg_fn_regex = re.compile("([A-Za-z_0-9\* ]* \*?)([a-zA-Z_0-9]*)\((.*)\);$")
 315 clone_fns = set()
 316 constructor_fns = {}
 317 c_array_class_caches = set()
 318 with open(sys.argv[1]) as in_h:
 319     for line in in_h:
 320         reg_fn = reg_fn_regex.match(line)
 321         if reg_fn is not None:
 322             if reg_fn.group(2).endswith("_clone"):
 323                 clone_fns.add(reg_fn.group(2))
 324             else:
 325                 rty = java_c_types(reg_fn.group(1), None)
 326                 if rty is not None and rty.rust_obj is not None and reg_fn.group(2) == rty.java_hu_ty + "_new":
 327                     constructor_fns[rty.rust_obj] = reg_fn.group(3)
 328             continue
 329         arr_fn = fn_ret_arr_regex.match(line)
 330         if arr_fn is not None:
 331             if arr_fn.group(2).endswith("_clone"):
 332                 clone_fns.add(arr_fn.group(2))
 333             # No object constructors return arrays, as then they wouldn't be an object constructor
 334             continue
 335
 336 # Define some manual clones...
 337 clone_fns.add("ThirtyTwoBytes_clone")
 338 write_c("static inline struct LDKThirtyTwoBytes ThirtyTwoBytes_clone(const struct LDKThirtyTwoBytes *orig) { struct LDKThirtyTwoBytes ret; memcpy(ret.data, orig->data, 32); return ret; }\n")
 339
 340 java_c_types_none_allowed = False # C structs created by cbindgen are declared in dependency order
 341
 342 with open(sys.argv[1]) as in_h, open(sys.argv[2], "w") as out_java:
 343     def map_type(fn_arg, print_void, ret_arr_len, is_free, holds_ref):
 344         ty_info = java_c_types(fn_arg, ret_arr_len)
 345         return map_type_with_info(ty_info, print_void, ret_arr_len, is_free, holds_ref)
 346
 347     def map_type_with_info(ty_info, print_void, ret_arr_len, is_free, holds_ref):
 348         if ty_info.c_ty == "void":
 349             if not print_void:
 350                 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 351                     arg_conv = None, arg_conv_name = None, arg_conv_cleanup = None,
 352                     ret_conv = None, ret_conv_name = None, to_hu_conv = None, to_hu_conv_name = None, from_hu_conv = None)
 353         if ty_info.c_ty.endswith("Array"):
 354             arr_len = ty_info.arr_len
 355             if arr_len is not None:
 356                 arr_name = ty_info.var_name
 357             else:
 358                 arr_name = "ret"
 359                 arr_len = ret_arr_len
 360             if ty_info.c_ty == "int8_tArray":
 361                 (set_pfx, set_sfx) = consts.set_native_arr_contents(arr_name + "_arr", arr_len, ty_info)
 362                 ret_conv = ("int8_tArray " + arr_name + "_arr = " + consts.create_native_arr_call(arr_len, ty_info) + ";\n" + set_pfx, "")
 363                 arg_conv_cleanup = None
 364                 if not arr_len.isdigit():
 365                     arg_conv = ty_info.rust_obj + " " + arr_name + "_ref;\n"
 366                     arg_conv = arg_conv + arr_name + "_ref." + arr_len + " = " +  consts.get_native_arr_len_call[0] + arr_name + consts.get_native_arr_len_call[1] + ";\n"
 367                     if (not ty_info.is_ptr or not holds_ref) and ty_info.rust_obj != "LDKu8slice":
 368                         arg_conv = arg_conv + arr_name + "_ref." + ty_info.arr_access + " = MALLOC(" + arr_name + "_ref." + arr_len + ", \"" + ty_info.rust_obj + " Bytes\");\n"
 369                         arg_conv = arg_conv + consts.get_native_arr_contents(arr_name, arr_name + "_ref." + ty_info.arr_access, arr_name + "_ref." + arr_len, ty_info, True) + ";"
 370                     else:
 371                         arg_conv = arg_conv + arr_name + "_ref." + ty_info.arr_access + " = " + consts.get_native_arr_contents(arr_name, "NO_DEST", arr_name + "_ref." + arr_len, ty_info, False) + ";"
 372                         arg_conv_cleanup = consts.cleanup_native_arr_ref_contents(arr_name, arr_name + "_ref." + ty_info.arr_access, arr_name + "_ref." + arr_len, ty_info)
 373                     if ty_info.rust_obj == "LDKTransaction":
 374                         arg_conv = arg_conv + "\n" + arr_name + "_ref.data_is_owned = " + str(holds_ref).lower() + ";"
 375                     ret_conv = (ty_info.rust_obj + " " + arr_name + "_var = ", "")
 376                     ret_conv = (ret_conv[0], ";\nint8_tArray " + arr_name + "_arr = " + consts.create_native_arr_call(arr_name + "_var." + arr_len, ty_info) + ";\n")
 377                     (pfx, sfx) = consts.set_native_arr_contents(arr_name + "_arr", arr_name + "_var." + arr_len, ty_info)
 378                     ret_conv = (ret_conv[0], ret_conv[1] + pfx + arr_name + "_var." + ty_info.arr_access + sfx + ";")
 379                     if not holds_ref and ty_info.rust_obj != "LDKu8slice":
 380                         ret_conv = (ret_conv[0], ret_conv[1] + "\n" + ty_info.rust_obj.replace("LDK", "") + "_free(" + arr_name + "_var);")
 381                 elif ty_info.rust_obj is not None:
 382                     arg_conv = ty_info.rust_obj + " " + arr_name + "_ref;\n"
 383                     arg_conv = arg_conv + "CHECK(" + consts.get_native_arr_len_call[0] + arr_name + consts.get_native_arr_len_call[1] + " == " + arr_len + ");\n"
 384                     arg_conv = arg_conv + consts.get_native_arr_contents(arr_name, arr_name + "_ref." + ty_info.arr_access, arr_len, ty_info, True) + ";"
 385                     ret_conv = (ret_conv[0], "." + ty_info.arr_access + set_sfx + ";")
 386                 else:
 387                     arg_conv = "unsigned char " + arr_name + "_arr[" + arr_len + "];\n"
 388                     arg_conv = arg_conv + "CHECK(" + consts.get_native_arr_len_call[0] + arr_name + consts.get_native_arr_len_call[1] + " == " + arr_len + ");\n"
 389                     arg_conv = arg_conv + consts.get_native_arr_contents(arr_name, arr_name + "_arr", arr_len, ty_info, True) + ";\n"
 390                     arg_conv = arg_conv + "unsigned char (*" + arr_name + "_ref)[" + arr_len + "] = &" + arr_name + "_arr;"
 391                     ret_conv = (ret_conv[0] + "*", set_sfx + ";")
 392                 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 393                     arg_conv = arg_conv, arg_conv_name = arr_name + "_ref", arg_conv_cleanup = arg_conv_cleanup,
 394                     ret_conv = ret_conv, ret_conv_name = arr_name + "_arr", to_hu_conv = None, to_hu_conv_name = None, from_hu_conv = None)
 395             else:
 396                 assert not arr_len.isdigit() # fixed length arrays not implemented
 397                 assert ty_info.java_ty[len(ty_info.java_ty) - 2:] == "[]"
 398                 conv_name = "arr_conv_" + str(len(ty_info.java_hu_ty))
 399                 idxc = chr(ord('a') + (len(ty_info.java_hu_ty) % 26))
 400                 ty_info.subty.var_name = conv_name
 401                 #XXX: We'd really prefer to only ever set to False, avoiding lots of clone, but need smarter free logic
 402                 #if ty_info.is_ptr or holds_ref:
 403                 #    ty_info.subty.requires_clone = False
 404                 ty_info.subty.requires_clone = not ty_info.is_ptr or not holds_ref
 405                 subty = map_type_with_info(ty_info.subty, False, None, is_free, holds_ref)
 406                 if arr_name == "":
 407                     arr_name = "arg"
 408                 arg_conv = ty_info.rust_obj + " " + arr_name + "_constr;\n"
 409                 arg_conv = arg_conv + arr_name + "_constr." + arr_len + " = " + consts.get_native_arr_len_call[0] + arr_name + consts.get_native_arr_len_call[1] + ";\n"
 410                 arg_conv = arg_conv + "if (" + arr_name + "_constr." + arr_len + " > 0)\n"
 411                 if subty.rust_obj is None:
 412                     szof = subty.c_ty
 413                 else:
 414                     szof = subty.rust_obj
 415                 arg_conv = arg_conv + "\t" + arr_name + "_constr." + ty_info.arr_access + " = MALLOC(" + arr_name + "_constr." + arr_len + " * sizeof(" + szof + "), \"" + ty_info.rust_obj + " Elements\");\n"
 416                 arg_conv = arg_conv + "else\n"
 417                 arg_conv = arg_conv + "\t" + arr_name + "_constr." + ty_info.arr_access + " = NULL;\n"
 418                 get_arr = consts.get_native_arr_contents(arr_name, "NO_DEST", arr_name + "_constr." + arr_len, ty_info, False)
 419                 if get_arr != None:
 420                     arg_conv = arg_conv + subty.c_ty + "* " + arr_name + "_vals = " + get_arr + ";\n"
 421                 arg_conv = arg_conv + "for (size_t " + idxc + " = 0; " + idxc + " < " + arr_name + "_constr." + arr_len + "; " + idxc + "++) {\n"
 422                 if get_arr != None:
 423                     arg_conv = arg_conv + "\t" + subty.c_ty + " " + conv_name + " = " + arr_name + "_vals[" + idxc + "];"
 424                     if subty.arg_conv is not None:
 425                         arg_conv = arg_conv + "\n\t" + subty.arg_conv.replace("\n", "\n\t")
 426                 else:
 427                     arg_conv = arg_conv + "\t" + subty.c_ty + " " + conv_name + " = " + consts.get_native_arr_elem(arr_name, idxc, ty_info) + ";\n"
 428                     arg_conv = arg_conv + "\t" + subty.arg_conv.replace("\n", "\n\t")
 429                 arg_conv = arg_conv + "\n\t" + arr_name + "_constr." + ty_info.arr_access + "[" + idxc + "] = " + subty.arg_conv_name + ";\n}"
 430                 if get_arr != None:
 431                     cleanup = consts.cleanup_native_arr_ref_contents(arr_name, arr_name + "_vals", arr_name + "_constr." + arr_len, ty_info)
 432                     if cleanup is not None:
 433                         arg_conv = arg_conv + "\n" + cleanup + ";"
 434                 if ty_info.is_ptr:
 435                     arg_conv_name = "&" + arr_name + "_constr"
 436                 else:
 437                     arg_conv_name = arr_name + "_constr"
 438                 arg_conv_cleanup = None
 439                 if ty_info.is_ptr:
 440                     arg_conv_cleanup = "FREE(" + arr_name + "_constr." + ty_info.arr_access + ");"
 441
 442                 if arr_name == "arg":
 443                     arr_name = "ret"
 444                 ret_conv = (ty_info.rust_obj + " " + arr_name + "_var = ", "")
 445                 if subty.ret_conv is None:
 446                     ret_conv = ("DUMMY", "DUMMY")
 447                 elif not ty_info.java_ty[:len(ty_info.java_ty) - 2].endswith("[]"):
 448                     ret_conv = (ret_conv[0], ";\n" + ty_info.c_ty + " " + arr_name + "_arr = " + consts.create_native_arr_call(arr_name + "_var." + arr_len, ty_info) + ";\n")
 449                     ret_conv = (ret_conv[0], ret_conv[1] + subty.c_ty + " *" + arr_name + "_arr_ptr = " + consts.get_native_arr_ptr_call[0] + arr_name + "_arr" + consts.get_native_arr_ptr_call[1] + ";\n")
 450                     ret_conv = (ret_conv[0], ret_conv[1] + "for (size_t " + idxc + " = 0; " + idxc + " < " + arr_name + "_var." + arr_len + "; " + idxc + "++) {\n")
 451                     ret_conv = (ret_conv[0], ret_conv[1] + "\t" + subty.ret_conv[0].replace("\n", "\n\t"))
 452                     ret_conv = (ret_conv[0], ret_conv[1] + arr_name + "_var." + ty_info.arr_access + "[" + idxc + "]" + subty.ret_conv[1].replace("\n", "\n\t"))
 453                     ret_conv = (ret_conv[0], ret_conv[1] + "\n\t" + arr_name + "_arr_ptr[" + idxc + "] = " + subty.ret_conv_name + ";\n}")
 454                     cleanup = consts.release_native_arr_ptr_call(arr_name + "_arr", arr_name + "_arr_ptr")
 455                     if cleanup is not None:
 456                         ret_conv = (ret_conv[0], ret_conv[1] + "\n" + cleanup + ";")
 457                 else:
 458                     assert ty_info.java_fn_ty_arg.startswith("[")
 459                     clz_var = ty_info.java_fn_ty_arg[1:].replace("[", "arr_of_")
 460                     c_array_class_caches.add(clz_var)
 461                     ret_conv = (ret_conv[0], ";\n" + ty_info.c_ty + " " + arr_name + "_arr = (*env)->NewObjectArray(env, " + arr_name + "_var." + arr_len + ", " + clz_var + "_clz, NULL);\n")
 462                     ret_conv = (ret_conv[0], ret_conv[1] + "for (size_t " + idxc + " = 0; " + idxc + " < " + arr_name + "_var." + arr_len + "; " + idxc + "++) {\n")
 463                     ret_conv = (ret_conv[0], ret_conv[1] + "\t" + subty.ret_conv[0].replace("\n", "\n\t"))
 464                     ret_conv = (ret_conv[0], ret_conv[1] + arr_name + "_var." + ty_info.arr_access + "[" + idxc + "]" + subty.ret_conv[1].replace("\n", "\n\t"))
 465                     ret_conv = (ret_conv[0], ret_conv[1] + "\n\t(*env)->SetObjectArrayElement(env, " + arr_name + "_arr, " + idxc + ", " + subty.ret_conv_name + ");\n")
 466                     ret_conv = (ret_conv[0], ret_conv[1] + "}")
 467                 if not holds_ref:
 468                     # XXX: The commented if's are a bit smarter freeing, but we need to be a nudge smarter still
 469                     # Note that we don't drop the full vec here - we're passing ownership to java (or have cloned) or free'd by now!
 470                     ret_conv = (ret_conv[0], ret_conv[1] + "\nFREE(" + arr_name + "_var." + ty_info.arr_access + ");")
 471                     #if subty.rust_obj is not None and subty.rust_obj in opaque_structs:
 472                     #    ret_conv = (ret_conv[0], ret_conv[1] + "\nFREE(" + arr_name + "_var." + ty_info.arr_access + ");")
 473                     #else:
 474                     #    ret_conv = (ret_conv[0], ret_conv[1] + "\n" + ty_info.rust_obj.replace("LDK", "") + "_free(" + arr_name + "_var);")
 475
 476                 to_hu_conv = None
 477                 to_hu_conv_name = None
 478                 if subty.to_hu_conv is not None:
 479                     to_hu_conv = ty_info.java_hu_ty + " " + conv_name + "_arr = new " + ty_info.subty.java_hu_ty.split("<")[0] + "[" + arr_name + ".length];\n"
 480                     to_hu_conv = to_hu_conv + "for (int " + idxc + " = 0; " + idxc + " < " + arr_name + ".length; " + idxc + "++) {\n"
 481                     to_hu_conv = to_hu_conv + "\t" + subty.java_ty + " " + conv_name + " = " + arr_name + "[" + idxc + "];\n"
 482                     to_hu_conv = to_hu_conv + "\t" + subty.to_hu_conv.replace("\n", "\n\t") + "\n"
 483                     to_hu_conv = to_hu_conv + "\t" + conv_name + "_arr[" + idxc + "] = " + subty.to_hu_conv_name + ";\n}"
 484                     to_hu_conv_name = conv_name + "_arr"
 485                 from_hu_conv = None
 486                 if subty.from_hu_conv is not None:
 487                     if subty.java_ty == "long" and subty.java_hu_ty != "long":
 488                         from_hu_conv = ("Arrays.stream(" + arr_name + ").mapToLong(" + conv_name + " -> " + subty.from_hu_conv[0] + ").toArray()", "/* TODO 2 " + subty.java_hu_ty + "  */")
 489                     elif subty.java_ty == "long":
 490                         from_hu_conv = ("Arrays.stream(" + arr_name + ").map(" + conv_name + " -> " + subty.from_hu_conv[0] + ").toArray()", "/* TODO 2 " + subty.java_hu_ty + "  */")
 491                     else:
 492                         from_hu_conv = ("(" + ty_info.java_ty + ")Arrays.stream(" + arr_name + ").map(" + conv_name + " -> " + subty.from_hu_conv[0] + ").toArray()", "/* TODO 2 " + subty.java_hu_ty + "  */")
 493
 494                 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 495                     arg_conv = arg_conv, arg_conv_name = arg_conv_name, arg_conv_cleanup = arg_conv_cleanup,
 496                     ret_conv = ret_conv, ret_conv_name = arr_name + "_arr", to_hu_conv = to_hu_conv, to_hu_conv_name = to_hu_conv_name, from_hu_conv = from_hu_conv)
 497         elif ty_info.java_ty == "String":
 498             if ty_info.arr_access is None:
 499                 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 500                     arg_conv = None, arg_conv_name = None, arg_conv_cleanup = None,
 501                     ret_conv = ("jstring " + ty_info.var_name + "_conv = (*env)->NewStringUTF(env, ", ");"), ret_conv_name = ty_info.var_name + "_conv",
 502                     to_hu_conv = None, to_hu_conv_name = None, from_hu_conv = None)
 503             else:
 504                 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 505                     arg_conv = None, arg_conv_name = None, arg_conv_cleanup = None,
 506                     ret_conv = ("LDKStr " + ty_info.var_name + "_str = ",
 507                         ";\nchar* " + ty_info.var_name + "_buf = MALLOC(" + ty_info.var_name + "_str." + ty_info.arr_len + " + 1, \"str conv buf\");\n" +
 508                         "memcpy(" + ty_info.var_name + "_buf, " + ty_info.var_name + "_str." + ty_info.arr_access + ", " + ty_info.var_name + "_str." + ty_info.arr_len + ");\n" +
 509                         ty_info.var_name + "_buf[" + ty_info.var_name + "_str." + ty_info.arr_len + "] = 0;\n" +
 510                         "jstring " + ty_info.var_name + "_conv = (*env)->NewStringUTF(env, " + ty_info.var_name + "_str." + ty_info.arr_access + ");\n" +
 511                         "FREE(" + ty_info.var_name + "_buf);"),
 512                     ret_conv_name = ty_info.var_name + "_conv", to_hu_conv = None, to_hu_conv_name = None, from_hu_conv = None)
 513         elif ty_info.var_name == "" and not print_void:
 514             # We don't have a parameter name, and want one, just call it arg
 515             if ty_info.rust_obj is not None:
 516                 assert(not is_free or ty_info.rust_obj not in opaque_structs)
 517                 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 518                     arg_conv = ty_info.rust_obj + " arg_conv = *(" + ty_info.rust_obj + "*)arg;\nFREE((void*)arg);",
 519                     arg_conv_name = "arg_conv", arg_conv_cleanup = None,
 520                     ret_conv = None, ret_conv_name = None, to_hu_conv = "TODO 7", to_hu_conv_name = None, from_hu_conv = None)
 521             else:
 522                 assert(not is_free)
 523                 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 524                     arg_conv = None, arg_conv_name = "arg", arg_conv_cleanup = None,
 525                     ret_conv = None, ret_conv_name = None, to_hu_conv = "TODO 8", to_hu_conv_name = None, from_hu_conv = None)
 526         elif ty_info.rust_obj is None:
 527             return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 528                 arg_conv = None, arg_conv_name = ty_info.var_name, arg_conv_cleanup = None,
 529                 ret_conv = None, ret_conv_name = None, to_hu_conv = None, to_hu_conv_name = None, from_hu_conv = None)
 530         else:
 531             if ty_info.var_name == "":
 532                 ty_info.var_name = "ret"
 533
 534             if ty_info.rust_obj in opaque_structs:
 535                 opaque_arg_conv = ty_info.rust_obj + " " + ty_info.var_name + "_conv;\n"
 536                 opaque_arg_conv = opaque_arg_conv + ty_info.var_name + "_conv.inner = (void*)(" + ty_info.var_name + " & (~1));\n"
 537                 if ty_info.is_ptr and holds_ref:
 538                     opaque_arg_conv = opaque_arg_conv + ty_info.var_name + "_conv.is_owned = false;"
 539                 else:
 540                     opaque_arg_conv = opaque_arg_conv + ty_info.var_name + "_conv.is_owned = (" + ty_info.var_name + " & 1) || (" + ty_info.var_name + " == 0);"
 541                 if not is_free and (not ty_info.is_ptr or not holds_ref or ty_info.requires_clone == True) and ty_info.requires_clone != False:
 542                     if (ty_info.rust_obj.replace("LDK", "") + "_clone") in clone_fns:
 543                         # TODO: This is a bit too naive, even with the checks above, we really need to know if rust wants a ref or not, not just if its pass as a ptr.
 544                         opaque_arg_conv = opaque_arg_conv + "\nif (" + ty_info.var_name + "_conv.inner != NULL)\n"
 545                         opaque_arg_conv = opaque_arg_conv + "\t" + ty_info.var_name + "_conv = " + ty_info.rust_obj.replace("LDK", "") + "_clone(&" + ty_info.var_name + "_conv);"
 546                     elif ty_info.passed_as_ptr:
 547                         opaque_arg_conv = opaque_arg_conv + "\n// Warning: we may need a move here but can't clone!"
 548
 549                 opaque_ret_conv_suf = ";\n"
 550                 if not holds_ref and ty_info.is_ptr and (ty_info.rust_obj.replace("LDK", "") + "_clone") in clone_fns: # is_ptr, not holds_ref implies passing a pointed-to value to java, which needs copied
 551                     opaque_ret_conv_suf = opaque_ret_conv_suf + "if (" + ty_info.var_name + "->inner != NULL)\n"
 552                     opaque_ret_conv_suf = opaque_ret_conv_suf + "\t" + ty_info.var_name + "_var = " + ty_info.rust_obj.replace("LDK", "") + "_clone(" + ty_info.var_name + ");\n"
 553                 elif not holds_ref and ty_info.is_ptr:
 554                     opaque_ret_conv_suf = opaque_ret_conv_suf + "// Warning: we may need a move here but can't clone!\n"
 555
 556                 opaque_ret_conv_suf = opaque_ret_conv_suf + "CHECK((((long)" + ty_info.var_name + "_var.inner) & 1) == 0); // We rely on a free low bit, malloc guarantees this.\n"
 557                 opaque_ret_conv_suf = opaque_ret_conv_suf + "CHECK((((long)&" + ty_info.var_name + "_var) & 1) == 0); // We rely on a free low bit, pointer alignment guarantees this.\n"
 558                 if holds_ref:
 559                     opaque_ret_conv_suf = opaque_ret_conv_suf + "long " + ty_info.var_name + "_ref = (long)" + ty_info.var_name + "_var.inner & ~1;"
 560                 else:
 561                     opaque_ret_conv_suf = opaque_ret_conv_suf + "long " + ty_info.var_name + "_ref = (long)" + ty_info.var_name + "_var.inner;\n"
 562                     opaque_ret_conv_suf = opaque_ret_conv_suf + "if (" + ty_info.var_name + "_var.is_owned) {\n"
 563                     opaque_ret_conv_suf = opaque_ret_conv_suf + "\t" + ty_info.var_name + "_ref |= 1;\n"
 564                     opaque_ret_conv_suf = opaque_ret_conv_suf + "}"
 565
 566                 if ty_info.is_ptr:
 567                     return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 568                         arg_conv = opaque_arg_conv, arg_conv_name = "&" + ty_info.var_name + "_conv", arg_conv_cleanup = None,
 569                         ret_conv = (ty_info.rust_obj + " " + ty_info.var_name + "_var = *", opaque_ret_conv_suf),
 570                         ret_conv_name = ty_info.var_name + "_ref",
 571                         to_hu_conv = ty_info.java_hu_ty + " " + ty_info.var_name + "_hu_conv = new " + ty_info.java_hu_ty + "(null, " + ty_info.var_name + ");",
 572                         to_hu_conv_name = ty_info.var_name + "_hu_conv",
 573                         from_hu_conv = (ty_info.var_name + " == null ? 0 : " + ty_info.var_name + ".ptr & ~1", "this.ptrs_to.add(" + ty_info.var_name + ")"))
 574                 else:
 575                     return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 576                         arg_conv = opaque_arg_conv, arg_conv_name = ty_info.var_name + "_conv", arg_conv_cleanup = None,
 577                         ret_conv = (ty_info.rust_obj + " " + ty_info.var_name + "_var = ", opaque_ret_conv_suf),
 578                         ret_conv_name = ty_info.var_name + "_ref",
 579                         to_hu_conv = ty_info.java_hu_ty + " " + ty_info.var_name + "_hu_conv = new " + ty_info.java_hu_ty + "(null, " + ty_info.var_name + ");",
 580                         to_hu_conv_name = ty_info.var_name + "_hu_conv",
 581                         from_hu_conv = (ty_info.var_name + " == null ? 0 : " + ty_info.var_name + ".ptr & ~1", "this.ptrs_to.add(" + ty_info.var_name + ")"))
 582
 583             if not ty_info.is_ptr:
 584                 if ty_info.rust_obj in unitary_enums:
 585                     (ret_pfx, ret_sfx) = consts.c_unitary_enum_to_native_call(ty_info)
 586                     (arg_pfx, arg_sfx) = consts.native_unitary_enum_to_c_call(ty_info)
 587                     return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 588                         arg_conv = ty_info.rust_obj + " " + ty_info.var_name + "_conv = " + arg_pfx + ty_info.var_name + arg_sfx + ";",
 589                         arg_conv_name = ty_info.var_name + "_conv",
 590                         arg_conv_cleanup = None,
 591                         ret_conv = (ty_info.c_ty + " " + ty_info.var_name + "_conv = " + ret_pfx, ret_sfx + ";"),
 592                         ret_conv_name = ty_info.var_name + "_conv", to_hu_conv = None, to_hu_conv_name = None, from_hu_conv = None)
 593                 base_conv = ty_info.rust_obj + " " + ty_info.var_name + "_conv = *(" + ty_info.rust_obj + "*)" + ty_info.var_name + ";"
 594                 if ty_info.rust_obj in trait_structs:
 595                     if not is_free:
 596                         needs_full_clone = not is_free and (not ty_info.is_ptr and not holds_ref or ty_info.requires_clone == True) and ty_info.requires_clone != False
 597                         if needs_full_clone and (ty_info.rust_obj.replace("LDK", "") + "_clone") in clone_fns:
 598                             base_conv = base_conv + "\n" + ty_info.var_name + "_conv = " + ty_info.rust_obj.replace("LDK", "") + "_clone(" + ty_info.var_name + ");"
 599                         else:
 600                             base_conv = base_conv + "\nif (" + ty_info.var_name + "_conv.free == " + ty_info.rust_obj + "_JCalls_free) {\n"
 601                             base_conv = base_conv + "\t// If this_arg is a JCalls struct, then we need to increment the refcnt in it.\n"
 602                             base_conv = base_conv + "\t" + ty_info.rust_obj + "_JCalls_clone(" + ty_info.var_name + "_conv.this_arg);\n}"
 603                             if needs_full_clone:
 604                                 base_conv = base_conv + "// Warning: we may need a move here but can't do a full clone!\n"
 605
 606                     else:
 607                         base_conv = base_conv + "\n" + "FREE((void*)" + ty_info.var_name + ");"
 608                     return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 609                         arg_conv = base_conv, arg_conv_name = ty_info.var_name + "_conv", arg_conv_cleanup = None,
 610                         ret_conv = (ty_info.rust_obj + "* ret = MALLOC(sizeof(" + ty_info.rust_obj + "), \"" + ty_info.rust_obj + "\");\n*ret = ", ";"),
 611                         ret_conv_name = "(long)ret",
 612                         to_hu_conv = ty_info.java_hu_ty + " ret_hu_conv = new " + ty_info.java_hu_ty + "(null, " + ty_info.var_name + ");\nret_hu_conv.ptrs_to.add(this);",
 613                         to_hu_conv_name = "ret_hu_conv",
 614                         from_hu_conv = (ty_info.var_name + " == null ? 0 : " + ty_info.var_name + ".ptr", "this.ptrs_to.add(" + ty_info.var_name + ")"))
 615                 if ty_info.rust_obj != "LDKu8slice":
 616                     # Don't bother free'ing slices passed in - Rust doesn't auto-free the
 617                     # underlying unlike Vecs, and it gives Java more freedom.
 618                     base_conv = base_conv + "\nFREE((void*)" + ty_info.var_name + ");";
 619                 if ty_info.rust_obj in complex_enums:
 620                     ret_conv = ("long " + ty_info.var_name + "_ref = (long)&", ";")
 621                     if not holds_ref:
 622                         ret_conv = (ty_info.rust_obj + " *" + ty_info.var_name + "_copy = MALLOC(sizeof(" + ty_info.rust_obj + "), \"" + ty_info.rust_obj + "\");\n", "")
 623                         if ty_info.requires_clone == True: # Set in object array mapping
 624                             if (ty_info.rust_obj.replace("LDK", "") + "_clone") in clone_fns:
 625                                 ret_conv = (ret_conv[0] + "*" + ty_info.var_name + "_copy = " + ty_info.rust_obj.replace("LDK", "") + "_clone(&", ");\n")
 626                             else:
 627                                 ret_conv = (ret_conv[0] + "*" + ty_info.var_name + "_copy = ", "; // XXX: We likely need to clone here, but no _clone fn is available!\n")
 628                         else:
 629                             ret_conv = (ret_conv[0] + "*" + ty_info.var_name + "_copy = ", ";\n")
 630                         ret_conv = (ret_conv[0], ret_conv[1] + "long " + ty_info.var_name + "_ref = (long)" + ty_info.var_name + "_copy;")
 631                     return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 632                         arg_conv = base_conv, arg_conv_name = ty_info.var_name + "_conv", arg_conv_cleanup = None,
 633                         ret_conv = ret_conv, ret_conv_name = ty_info.var_name + "_ref",
 634                         to_hu_conv = ty_info.java_hu_ty + " " + ty_info.var_name + "_hu_conv = " + ty_info.java_hu_ty + ".constr_from_ptr(" + ty_info.var_name + ");\n" + ty_info.var_name + "_hu_conv.ptrs_to.add(this);",
 635                         to_hu_conv_name = ty_info.var_name + "_hu_conv", from_hu_conv = (ty_info.var_name + ".ptr", ""))
 636                 if ty_info.rust_obj in result_types:
 637                     if holds_ref:
 638                         # If we're trying to return a ref, we have to clone.
 639                         # We just blindly assume its implemented and let the compiler fail if its not.
 640                         ret_conv = (ty_info.rust_obj + "* " + ty_info.var_name + "_conv = MALLOC(sizeof(" + ty_info.rust_obj + "), \"" + ty_info.rust_obj + "\");\n*" + ty_info.var_name + "_conv = ", ";")
 641                         ret_conv = (ret_conv[0], ret_conv[1] + "\n*" + ty_info.var_name + "_conv = " + ty_info.rust_obj.replace("LDK", "") + "_clone(" + ty_info.var_name + "_conv);")
 642                     else:
 643                         ret_conv = (ty_info.rust_obj + "* " + ty_info.var_name + "_conv = MALLOC(sizeof(" + ty_info.rust_obj + "), \"" + ty_info.rust_obj + "\");\n*" + ty_info.var_name + "_conv = ", ";")
 644                     return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 645                         arg_conv = base_conv, arg_conv_name = ty_info.var_name + "_conv", arg_conv_cleanup = None,
 646                         ret_conv = ret_conv, ret_conv_name = "(long)" + ty_info.var_name + "_conv",
 647                         to_hu_conv = ty_info.java_hu_ty + " " + ty_info.var_name + "_hu_conv = " + ty_info.java_hu_ty + ".constr_from_ptr(" + ty_info.var_name + ");",
 648                         to_hu_conv_name = ty_info.var_name + "_hu_conv", from_hu_conv = (ty_info.var_name + " != null ? " + ty_info.var_name + ".ptr : 0", ""))
 649                 if ty_info.rust_obj in tuple_types:
 650                     from_hu_conv = "bindings." + tuple_types[ty_info.rust_obj][1].replace("LDK", "") + "_new("
 651                     to_hu_conv_pfx = ""
 652                     to_hu_conv_sfx = ty_info.java_hu_ty + " " + ty_info.var_name + "_conv = new " + ty_info.java_hu_ty + "("
 653                     clone_ret_str = ""
 654                     for idx, conv in enumerate(tuple_types[ty_info.rust_obj][0]):
 655                         if idx != 0:
 656                             to_hu_conv_sfx = to_hu_conv_sfx + ", "
 657                             from_hu_conv = from_hu_conv + ", "
 658                         conv.var_name = ty_info.var_name + "_" + chr(idx + ord("a"))
 659                         conv_map = map_type_with_info(conv, False, None, is_free, holds_ref)
 660                         to_hu_conv_pfx = to_hu_conv_pfx + conv.java_ty + " " + ty_info.var_name + "_" + chr(idx + ord("a")) + " = " + "bindings." + tuple_types[ty_info.rust_obj][1] + "_get_" + chr(idx + ord("a")) + "(" + ty_info.var_name + ");\n"
 661                         if conv_map.to_hu_conv is not None:
 662                             to_hu_conv_pfx = to_hu_conv_pfx + conv_map.to_hu_conv + ";\n"
 663                             to_hu_conv_sfx = to_hu_conv_sfx + conv_map.to_hu_conv_name
 664                         else:
 665                             to_hu_conv_sfx = to_hu_conv_sfx + ty_info.var_name + "_" + chr(idx + ord("a"))
 666                         if conv_map.from_hu_conv is not None:
 667                             from_hu_conv = from_hu_conv + conv_map.from_hu_conv[0].replace(ty_info.var_name + "_" + chr(idx + ord("a")), ty_info.var_name + "." + chr(idx + ord("a")))
 668                             if conv_map.from_hu_conv[1] != "":
 669                                 from_hu_conv = from_hu_conv + "/*XXX: " + conv_map.from_hu_conv[1] + "*/"
 670                         else:
 671                             from_hu_conv = from_hu_conv + ty_info.var_name + "." + chr(idx + ord("a"))
 672
 673                         if conv.is_native_primitive:
 674                             pass
 675                         elif (conv_map.rust_obj.replace("LDK", "") + "_clone") in clone_fns:
 676                             accessor = ty_info.var_name + "_ref->" + chr(idx + ord("a"))
 677                             clone_ret_str = clone_ret_str + "\n" + accessor + " = " + conv_map.rust_obj.replace("LDK", "") + "_clone(&" + accessor + ");"
 678                         else:
 679                             clone_ret_str = clone_ret_str + "\n// XXX: We likely need to clone here, but no _clone fn is available for " + conv_map.java_hu_ty
 680                     if not ty_info.is_ptr and not holds_ref:
 681                         ret_conv = (ty_info.rust_obj + "* " + ty_info.var_name + "_ref = MALLOC(sizeof(" + ty_info.rust_obj + "), \"" + ty_info.rust_obj + "\");\n*" + ty_info.var_name + "_ref = ", ";")
 682                         if not is_free and (not ty_info.is_ptr and not holds_ref or ty_info.requires_clone == True) and ty_info.requires_clone != False:
 683                             ret_conv = (ret_conv[0], ret_conv[1] + clone_ret_str)
 684                         return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 685                             arg_conv = base_conv, arg_conv_name = ty_info.var_name + "_conv", arg_conv_cleanup = None,
 686                             ret_conv = ret_conv,
 687                             ret_conv_name = "(long)" + ty_info.var_name + "_ref",
 688                             to_hu_conv = to_hu_conv_pfx + to_hu_conv_sfx + ");", to_hu_conv_name = ty_info.var_name + "_conv", from_hu_conv = (from_hu_conv + ")", ""))
 689                     return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 690                         arg_conv = base_conv, arg_conv_name = ty_info.var_name + "_conv", arg_conv_cleanup = None,
 691                         ret_conv = ("long " + ty_info.var_name + "_ref = (long)&", ";"), ret_conv_name = ty_info.var_name + "_ref",
 692                         to_hu_conv = to_hu_conv_pfx + to_hu_conv_sfx + ");", to_hu_conv_name = ty_info.var_name + "_conv", from_hu_conv = (from_hu_conv + ")", ""))
 693
 694                 # The manually-defined types - TxOut and Transaction
 695                 assert ty_info.rust_obj == "LDKTxOut"
 696                 if not ty_info.is_ptr and not holds_ref:
 697                     ret_conv = ("LDKTxOut* " + ty_info.var_name + "_ref = MALLOC(sizeof(LDKTxOut), \"LDKTxOut\");\n*" + ty_info.var_name + "_ref = ", ";")
 698                 else:
 699                     ret_conv = ("long " + ty_info.var_name + "_ref = (long)&", ";")
 700                 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 701                     arg_conv = base_conv, arg_conv_name = ty_info.var_name + "_conv", arg_conv_cleanup = None,
 702                     ret_conv = ret_conv, ret_conv_name = "(long)" + ty_info.var_name + "_ref",
 703                     to_hu_conv = ty_info.java_hu_ty + " " + ty_info.var_name + "_conv = new " +ty_info.java_hu_ty + "(null, " + ty_info.var_name + ");",
 704                     to_hu_conv_name = ty_info.var_name + "_conv", from_hu_conv = (ty_info.var_name + ".ptr", ""))
 705             elif ty_info.is_ptr:
 706                 assert(not is_free)
 707                 if ty_info.rust_obj in complex_enums:
 708                     return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 709                         arg_conv = ty_info.rust_obj + "* " + ty_info.var_name + "_conv = (" + ty_info.rust_obj + "*)" + ty_info.var_name + ";",
 710                         arg_conv_name = ty_info.var_name + "_conv", arg_conv_cleanup = None,
 711                         ret_conv = ("long ret_" + ty_info.var_name + " = (long)", ";"), ret_conv_name = "ret_" + ty_info.var_name,
 712                         to_hu_conv = ty_info.java_hu_ty + " " + ty_info.var_name + "_hu_conv = " + ty_info.java_hu_ty + ".constr_from_ptr(" + ty_info.var_name + ");",
 713                         to_hu_conv_name = ty_info.var_name + "_hu_conv",
 714                         from_hu_conv = (ty_info.var_name + " == null ? 0 : " + ty_info.var_name + ".ptr & ~1", "this.ptrs_to.add(" + ty_info.var_name + ")"))
 715                 elif ty_info.rust_obj in trait_structs:
 716                     if ty_info.rust_obj.replace("LDK", "") + "_clone" in clone_fns:
 717                         return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 718                             arg_conv = ty_info.rust_obj + "* " + ty_info.var_name + "_conv = (" + ty_info.rust_obj + "*)" + ty_info.var_name + ";",
 719                             arg_conv_name = ty_info.var_name + "_conv", arg_conv_cleanup = None,
 720                             ret_conv = (ty_info.rust_obj + " *" + ty_info.var_name + "_clone = MALLOC(sizeof(" + ty_info.rust_obj + "), \"" + ty_info.rust_obj + "\");\n" +
 721                                 "*" + ty_info.var_name + "_clone = " + ty_info.rust_obj.replace("LDK", "") + "_clone(", ");"),
 722                             ret_conv_name = "(long)" + ty_info.var_name + "_clone",
 723                             to_hu_conv = ty_info.java_hu_ty + " ret_hu_conv = new " + ty_info.java_hu_ty + "(null, " + ty_info.var_name + ");\nret_hu_conv.ptrs_to.add(this);",
 724                             to_hu_conv_name = "ret_hu_conv",
 725                             from_hu_conv = (ty_info.var_name + " == null ? 0 : " + ty_info.var_name + ".ptr", "this.ptrs_to.add(" + ty_info.var_name + ")"))
 726                     else:
 727                         return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 728                             arg_conv = ty_info.rust_obj + "* " + ty_info.var_name + "_conv = (" + ty_info.rust_obj + "*)" + ty_info.var_name + ";",
 729                             arg_conv_name = ty_info.var_name + "_conv", arg_conv_cleanup = None,
 730                             ret_conv = ("long ret_" + ty_info.var_name + " = (long)", ";"), ret_conv_name = "ret_" + ty_info.var_name,
 731                             to_hu_conv = ty_info.java_hu_ty + " ret_hu_conv = new " + ty_info.java_hu_ty + "(null, " + ty_info.var_name + ");\nret_hu_conv.ptrs_to.add(this);",
 732                             to_hu_conv_name = "ret_hu_conv",
 733                             from_hu_conv = (ty_info.var_name + " == null ? 0 : " + ty_info.var_name + ".ptr", "this.ptrs_to.add(" + ty_info.var_name + ")"))
 734                 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 735                     arg_conv = ty_info.rust_obj + "* " + ty_info.var_name + "_conv = (" + ty_info.rust_obj + "*)" + ty_info.var_name + ";",
 736                     arg_conv_name = ty_info.var_name + "_conv", arg_conv_cleanup = None,
 737                     ret_conv = ("long ret_" + ty_info.var_name + " = (long)", ";"), ret_conv_name = "ret_" + ty_info.var_name,
 738                     to_hu_conv = "TODO 3", to_hu_conv_name = None, from_hu_conv = None) # its a pointer, no conv needed
 739             assert False # We should have handled every case by now.
 740
 741     def map_fn(line, re_match, ret_arr_len, c_call_string):
 742         out_java.write("\t// " + line)
 743         out_java.write("\tpublic static native ")
 744         write_c(consts.c_fn_ty_pfx)
 745
 746         is_free = re_match.group(2).endswith("_free")
 747         struct_meth = re_match.group(2).split("_")[0]
 748
 749         ret_info = map_type(re_match.group(1), True, ret_arr_len, False, False)
 750         write_c(ret_info.c_ty)
 751         out_java.write(ret_info.java_ty)
 752
 753         if ret_info.ret_conv is not None:
 754             ret_conv_pfx, ret_conv_sfx = ret_info.ret_conv
 755
 756         out_java.write(" " + re_match.group(2) + "(")
 757         write_c(" " + consts.c_fn_name_pfx + re_match.group(2).replace('_', '_1') + "(" + consts.c_fn_args_pfx)
 758
 759         arg_names = []
 760         default_constructor_args = {}
 761         takes_self = False
 762         args_known = True
 763         for idx, arg in enumerate(re_match.group(3).split(',')):
 764             if idx != 0:
 765                 out_java.write(", ")
 766             if arg != "void":
 767                 write_c(", ")
 768             arg_conv_info = map_type(arg, False, None, is_free, True)
 769             if arg_conv_info.c_ty != "void":
 770                 write_c(arg_conv_info.c_ty + " " + arg_conv_info.arg_name)
 771                 out_java.write(arg_conv_info.java_ty + " " + arg_conv_info.arg_name)
 772             if idx == 0 and arg_conv_info.java_hu_ty == struct_meth:
 773                 takes_self = True
 774             if arg_conv_info.arg_conv is not None and "Warning" in arg_conv_info.arg_conv:
 775                 if arg_conv_info.rust_obj in constructor_fns:
 776                     assert not is_free
 777                     for explode_arg in constructor_fns[arg_conv_info.rust_obj].split(','):
 778                         explode_arg_conv = map_type(explode_arg, False, None, False, True)
 779                         if explode_arg_conv.c_ty == "void":
 780                             # We actually want to handle this case, but for now its only used in NetGraphMsgHandler::new()
 781                             # which ends up resulting in a redundant constructor - both without arguments for the NetworkGraph.
 782                             args_known = False
 783                             pass
 784                         if not arg_conv_info.arg_name in default_constructor_args:
 785                             default_constructor_args[arg_conv_info.arg_name] = []
 786                         default_constructor_args[arg_conv_info.arg_name].append(explode_arg_conv)
 787             arg_names.append(arg_conv_info)
 788
 789         out_java_struct = None
 790         if ("LDK" + struct_meth in opaque_structs or "LDK" + struct_meth in trait_structs) and not is_free:
 791             out_java_struct = open(f"{sys.argv[3]}/structs/{struct_meth}{consts.file_ext}", "a")
 792             if not args_known:
 793                 out_java_struct.write("\t// Skipped " + re_match.group(2) + "\n")
 794                 out_java_struct.close()
 795                 out_java_struct = None
 796             else:
 797                 meth_n = re_match.group(2)[len(struct_meth) + 1:]
 798                 if not takes_self:
 799                     out_java_struct.write("\tpublic static " + ret_info.java_hu_ty + " constructor_" + meth_n + "(")
 800                 else:
 801                     out_java_struct.write("\tpublic " + ret_info.java_hu_ty + " " + meth_n + "(")
 802                 for idx, arg in enumerate(arg_names):
 803                     if idx != 0:
 804                         if not takes_self or idx > 1:
 805                             out_java_struct.write(", ")
 806                     elif takes_self:
 807                         continue
 808                     if arg.java_ty != "void":
 809                         if arg.arg_name in default_constructor_args:
 810                             for explode_idx, explode_arg in enumerate(default_constructor_args[arg.arg_name]):
 811                                 if explode_idx != 0:
 812                                     out_java_struct.write(", ")
 813                                 out_java_struct.write(explode_arg.java_hu_ty + " " + arg.arg_name + "_" + explode_arg.arg_name)
 814                         else:
 815                             out_java_struct.write(arg.java_hu_ty + " " + arg.arg_name)
 816
 817
 818         out_java.write(");\n")
 819         write_c(") {\n")
 820         if out_java_struct is not None:
 821             out_java_struct.write(") {\n")
 822
 823         for info in arg_names:
 824             if info.arg_conv is not None:
 825                 write_c("\t" + info.arg_conv.replace('\n', "\n\t") + "\n")
 826
 827         if ret_info.ret_conv is not None:
 828             write_c("\t" + ret_conv_pfx.replace('\n', '\n\t'))
 829         elif ret_info.c_ty != "void":
 830             write_c("\t" + ret_info.c_ty + " ret_val = ")
 831         else:
 832             write_c("\t")
 833
 834         if c_call_string is None:
 835             write_c(re_match.group(2) + "(")
 836         else:
 837             write_c(c_call_string)
 838         for idx, info in enumerate(arg_names):
 839             if info.arg_conv_name is not None:
 840                 if idx != 0:
 841                     write_c(", ")
 842                 elif c_call_string is not None:
 843                     continue
 844                 write_c(info.arg_conv_name)
 845         write_c(")")
 846         if ret_info.ret_conv is not None:
 847             write_c(ret_conv_sfx.replace('\n', '\n\t'))
 848         else:
 849             write_c(";")
 850         for info in arg_names:
 851             if info.arg_conv_cleanup is not None:
 852                 write_c("\n\t" + info.arg_conv_cleanup.replace("\n", "\n\t"))
 853         if ret_info.ret_conv is not None:
 854             write_c("\n\treturn " + ret_info.ret_conv_name + ";")
 855         elif ret_info.c_ty != "void":
 856             write_c("\n\treturn ret_val;")
 857         write_c("\n}\n\n")
 858         if out_java_struct is not None:
 859             out_java_struct.write("\t\t")
 860             if ret_info.java_ty != "void":
 861                 out_java_struct.write(ret_info.java_ty + " ret = ")
 862             out_java_struct.write("bindings." + re_match.group(2) + "(")
 863             for idx, info in enumerate(arg_names):
 864                 if idx != 0:
 865                     out_java_struct.write(", ")
 866                 if idx == 0 and takes_self:
 867                     out_java_struct.write("this.ptr")
 868                 elif info.arg_name in default_constructor_args:
 869                     out_java_struct.write("bindings." + info.java_hu_ty + "_new(")
 870                     for explode_idx, explode_arg in enumerate(default_constructor_args[info.arg_name]):
 871                         if explode_idx != 0:
 872                             out_java_struct.write(", ")
 873                         expl_arg_name = info.arg_name + "_" + explode_arg.arg_name
 874                         if explode_arg.from_hu_conv is not None:
 875                             out_java_struct.write(explode_arg.from_hu_conv[0].replace(explode_arg.arg_name, expl_arg_name))
 876                         else:
 877                             out_java_struct.write(expl_arg_name)
 878                     out_java_struct.write(")")
 879                 elif info.from_hu_conv is not None:
 880                     out_java_struct.write(info.from_hu_conv[0])
 881                 else:
 882                     out_java_struct.write(info.arg_name)
 883             out_java_struct.write(");\n")
 884             if ret_info.to_hu_conv is not None:
 885                 if not takes_self:
 886                     out_java_struct.write("\t\t" + ret_info.to_hu_conv.replace("\n", "\n\t\t").replace("this", ret_info.to_hu_conv_name) + "\n")
 887                 else:
 888                     out_java_struct.write("\t\t" + ret_info.to_hu_conv.replace("\n", "\n\t\t") + "\n")
 889
 890             for idx, info in enumerate(arg_names):
 891                 if idx == 0 and takes_self:
 892                     pass
 893                 elif info.arg_name in default_constructor_args:
 894                     for explode_arg in default_constructor_args[info.arg_name]:
 895                         expl_arg_name = info.arg_name + "_" + explode_arg.arg_name
 896                         if explode_arg.from_hu_conv is not None and ret_info.to_hu_conv_name:
 897                             out_java_struct.write("\t\t" + explode_arg.from_hu_conv[1].replace(explode_arg.arg_name, expl_arg_name).replace("this", ret_info.to_hu_conv_name) + ";\n")
 898                 elif info.from_hu_conv is not None and info.from_hu_conv[1] != "":
 899                     if not takes_self and ret_info.to_hu_conv_name is not None:
 900                         out_java_struct.write("\t\t" + info.from_hu_conv[1].replace("this", ret_info.to_hu_conv_name) + ";\n")
 901                     else:
 902                         out_java_struct.write("\t\t" + info.from_hu_conv[1] + ";\n")
 903
 904             if ret_info.to_hu_conv_name is not None:
 905                 out_java_struct.write("\t\treturn " + ret_info.to_hu_conv_name + ";\n")
 906             elif ret_info.java_ty != "void" and ret_info.rust_obj != "LDK" + struct_meth:
 907                 out_java_struct.write("\t\treturn ret;\n")
 908             out_java_struct.write("\t}\n\n")
 909             out_java_struct.close()
 910
 911     def map_unitary_enum(struct_name, field_lines):
 912         with open(f"{sys.argv[3]}/enums/{struct_name}{consts.file_ext}", "w") as out_java_enum:
 913             unitary_enums.add(struct_name)
 914             for idx, struct_line in enumerate(field_lines):
 915                 if idx == 0:
 916                     assert(struct_line == "typedef enum %s {" % struct_name)
 917                 elif idx == len(field_lines) - 3:
 918                     assert(struct_line.endswith("_Sentinel,"))
 919                 elif idx == len(field_lines) - 2:
 920                     assert(struct_line == "} %s;" % struct_name)
 921                 elif idx == len(field_lines) - 1:
 922                     assert(struct_line == "")
 923             (c_out, native_file_out, native_out) = consts.native_c_unitary_enum_map(struct_name, [x.strip().strip(",") for x in field_lines[1:-3]])
 924             write_c(c_out)
 925             out_java_enum.write(native_file_out)
 926             out_java.write(native_out)
 927
 928     def map_complex_enum(struct_name, union_enum_items):
 929         java_hu_type = struct_name.replace("LDK", "")
 930         complex_enums.add(struct_name)
 931         with open(f"{sys.argv[3]}/structs/{java_hu_type}{consts.file_ext}", "w") as out_java_enum:
 932             (out_java_addendum, out_java_enum_addendum, out_c_addendum) = consts.map_complex_enum(struct_name, union_enum_items, map_type, camel_to_snake)
 933
 934             out_java_enum.write(out_java_enum_addendum)
 935             out_java.write(out_java_addendum)
 936             write_c(out_c_addendum)
 937
 938     def map_trait(struct_name, field_var_lines, trait_fn_lines):
 939         with open(f"{sys.argv[3]}/structs/{struct_name.replace('LDK', '')}{consts.file_ext}", "w") as out_java_trait:
 940             field_var_convs = []
 941             for var_line in field_var_lines:
 942                 if var_line.group(1) in trait_structs:
 943                     field_var_convs.append((var_line.group(1), var_line.group(2)))
 944                 else:
 945                     field_var_convs.append(map_type(var_line.group(1) + " " + var_line.group(2), False, None, False, False))
 946
 947             field_fns = []
 948             for fn_line in trait_fn_lines:
 949                 ret_ty_info = map_type(fn_line.group(2), True, None, False, False)
 950                 is_const = fn_line.group(4) is not None
 951
 952                 arg_tys = []
 953                 for idx, arg in enumerate(fn_line.group(5).split(',')):
 954                     if arg == "":
 955                         continue
 956                     arg_conv_info = map_type(arg, True, None, False, False)
 957                     arg_tys.append(arg_conv_info)
 958                 field_fns.append(TraitMethInfo(fn_line.group(3), is_const, ret_ty_info, arg_tys))
 959
 960             write_c(consts.native_c_map_trait(struct_name, field_var_convs, field_fns)[1])
 961
 962             out_java_trait.write(consts.hu_struct_file_prefix)
 963             out_java_trait.write("public class " + struct_name.replace("LDK","") + " extends CommonBase {\n")
 964             out_java_trait.write("\tfinal bindings." + struct_name + " bindings_instance;\n")
 965             out_java_trait.write("\t" + struct_name.replace("LDK", "") + "(Object _dummy, long ptr) { super(ptr); bindings_instance = null; }\n")
 966             out_java_trait.write("\tprivate " + struct_name.replace("LDK", "") + "(bindings." + struct_name + " arg")
 967             for idx, var_line in enumerate(field_var_lines):
 968                 if var_line.group(1) in trait_structs:
 969                     out_java_trait.write(", bindings." + var_line.group(1) + " " + var_line.group(2))
 970                 else:
 971                     out_java_trait.write(", " + field_var_convs[idx].java_hu_ty + " " + var_line.group(2))
 972             out_java_trait.write(") {\n")
 973             out_java_trait.write("\t\tsuper(bindings." + struct_name + "_new(arg")
 974             for idx, var_line in enumerate(field_var_lines):
 975                 if var_line.group(1) in trait_structs:
 976                     out_java_trait.write(", " + var_line.group(2))
 977                 elif field_var_convs[idx].from_hu_conv is not None:
 978                     out_java_trait.write(", " + field_var_convs[idx].from_hu_conv[0])
 979                 else:
 980                     out_java_trait.write(", " + var_line.group(2))
 981             out_java_trait.write("));\n")
 982             out_java_trait.write("\t\tthis.ptrs_to.add(arg);\n")
 983             for idx, var_line in enumerate(field_var_lines):
 984                 if var_line.group(1) in trait_structs:
 985                     out_java_trait.write("\t\tthis.ptrs_to.add(" + var_line.group(2) + ");\n")
 986                 elif field_var_convs[idx].from_hu_conv is not None and field_var_convs[idx].from_hu_conv[1] != "":
 987                     out_java_trait.write("\t\t" + field_var_convs[idx].from_hu_conv[1] + ";\n")
 988             out_java_trait.write("\t\tthis.bindings_instance = arg;\n")
 989             out_java_trait.write("\t}\n")
 990             out_java_trait.write("\t@Override @SuppressWarnings(\"deprecation\")\n")
 991             out_java_trait.write("\tprotected void finalize() throws Throwable {\n")
 992             out_java_trait.write("\t\tif (ptr != 0) { bindings." + struct_name.replace("LDK","") + "_free(ptr); } super.finalize();\n")
 993             out_java_trait.write("\t}\n\n")
 994
 995             java_trait_constr = "\tprivate static class " + struct_name + "Holder { " + struct_name.replace("LDK", "") + " held; }\n"
 996             java_trait_constr = java_trait_constr + "\tpublic static " + struct_name.replace("LDK", "") + " new_impl(" + struct_name.replace("LDK", "") + "Interface arg"
 997             for idx, var_line in enumerate(field_var_lines):
 998                 if var_line.group(1) in trait_structs:
 999                     # Ideally we'd be able to take any instance of the interface, but our C code can only represent
1000                     # Java-implemented version, so we require users pass a Java implementation here :/
1001                     java_trait_constr = java_trait_constr + ", " + var_line.group(1).replace("LDK", "") + "." + var_line.group(1).replace("LDK", "") + "Interface " + var_line.group(2) + "_impl"
1002                 else:
1003                     java_trait_constr = java_trait_constr + ", " + field_var_convs[idx].java_hu_ty + " " + var_line.group(2)
1004             java_trait_constr = java_trait_constr + ") {\n\t\tfinal " + struct_name + "Holder impl_holder = new " + struct_name + "Holder();\n"
1005             java_trait_constr = java_trait_constr + "\t\timpl_holder.held = new " + struct_name.replace("LDK", "") + "(new bindings." + struct_name + "() {\n"
1006             out_java_trait.write("\tpublic static interface " + struct_name.replace("LDK", "") + "Interface {\n")
1007             out_java.write("\tpublic interface " + struct_name + " {\n")
1008             java_meths = []
1009             for fn_line in trait_fn_lines:
1010                 java_meth_descr = "("
1011                 if fn_line.group(3) != "free" and fn_line.group(3) != "clone":
1012                     ret_ty_info = map_type(fn_line.group(2), True, None, False, False)
1013
1014                     out_java.write("\t\t " + ret_ty_info.java_ty + " " + fn_line.group(3) + "(")
1015                     java_trait_constr = java_trait_constr + "\t\t\t@Override public " + ret_ty_info.java_ty + " " + fn_line.group(3) + "("
1016                     out_java_trait.write("\t\t" + ret_ty_info.java_hu_ty + " " + fn_line.group(3) + "(")
1017                     is_const = fn_line.group(4) is not None
1018
1019                     arg_names = []
1020                     for idx, arg in enumerate(fn_line.group(5).split(',')):
1021                         if arg == "":
1022                             continue
1023                         if idx >= 2:
1024                             out_java.write(", ")
1025                             java_trait_constr = java_trait_constr + ", "
1026                             out_java_trait.write(", ")
1027                         arg_conv_info = map_type(arg, True, None, False, False)
1028                         out_java.write(arg_conv_info.java_ty + " " + arg_conv_info.arg_name)
1029                         out_java_trait.write(arg_conv_info.java_hu_ty + " " + arg_conv_info.arg_name)
1030                         java_trait_constr = java_trait_constr + arg_conv_info.java_ty + " " + arg_conv_info.arg_name
1031                         arg_names.append(arg_conv_info)
1032                         java_meth_descr = java_meth_descr + arg_conv_info.java_fn_ty_arg
1033                     java_meth_descr = java_meth_descr + ")" + ret_ty_info.java_fn_ty_arg
1034                     java_meths.append((fn_line, java_meth_descr))
1035
1036                     out_java.write(");\n")
1037                     out_java_trait.write(");\n")
1038                     java_trait_constr = java_trait_constr + ") {\n"
1039
1040                     for arg_info in arg_names:
1041                         if arg_info.to_hu_conv is not None:
1042                             java_trait_constr = java_trait_constr + "\t\t\t\t" + arg_info.to_hu_conv.replace("\n", "\n\t\t\t\t") + "\n"
1043
1044                     if ret_ty_info.java_ty != "void":
1045                         java_trait_constr = java_trait_constr + "\t\t\t\t" + ret_ty_info.java_hu_ty + " ret = arg." + fn_line.group(3) + "("
1046                     else:
1047                         java_trait_constr = java_trait_constr + "\t\t\t\targ." + fn_line.group(3) + "("
1048
1049                     for idx, arg_info in enumerate(arg_names):
1050                         if idx != 0:
1051                             java_trait_constr = java_trait_constr + ", "
1052                         if arg_info.to_hu_conv_name is not None:
1053                             java_trait_constr = java_trait_constr + arg_info.to_hu_conv_name
1054                         else:
1055                             java_trait_constr = java_trait_constr + arg_info.arg_name
1056
1057                     java_trait_constr = java_trait_constr + ");\n"
1058                     if ret_ty_info.java_ty != "void":
1059                         if ret_ty_info.from_hu_conv is not None:
1060                             java_trait_constr = java_trait_constr + "\t\t\t\t" + ret_ty_info.java_ty + " result = " + ret_ty_info.from_hu_conv[0] + ";\n"
1061                             if ret_ty_info.from_hu_conv[1] != "":
1062                                 java_trait_constr = java_trait_constr + "\t\t\t\t" + ret_ty_info.from_hu_conv[1].replace("this", "impl_holder.held") + ";\n"
1063                             if ret_ty_info.rust_obj in result_types:
1064                                 # Avoid double-free by breaking the result - we should learn to clone these and then we can be safe instead
1065                                 java_trait_constr = java_trait_constr + "\t\t\t\tret.ptr = 0;\n"
1066                             java_trait_constr = java_trait_constr + "\t\t\t\treturn result;\n"
1067                         else:
1068                             java_trait_constr = java_trait_constr + "\t\t\t\treturn ret;\n"
1069                     java_trait_constr = java_trait_constr + "\t\t\t}\n"
1070             java_trait_constr = java_trait_constr + "\t\t}"
1071             for var_line in field_var_lines:
1072                 if var_line.group(1) in trait_structs:
1073                     java_trait_constr = java_trait_constr + ", " + var_line.group(2) + ".new_impl(" + var_line.group(2) + "_impl).bindings_instance"
1074                 else:
1075                     java_trait_constr = java_trait_constr + ", " + var_line.group(2)
1076             out_java_trait.write("\t}\n")
1077             out_java_trait.write(java_trait_constr + ");\n\t\treturn impl_holder.held;\n\t}\n")
1078
1079             # Write out a clone function whether we need one or not, as we use them in moving to rust
1080             write_c("static void* " + struct_name + "_JCalls_clone(const void* this_arg) {\n")
1081             write_c("\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n")
1082             write_c("\tatomic_fetch_add_explicit(&j_calls->refcnt, 1, memory_order_release);\n")
1083             for var_line in field_var_lines:
1084                 if var_line.group(1) in trait_structs:
1085                     write_c("\tatomic_fetch_add_explicit(&j_calls->" + var_line.group(2) + "->refcnt, 1, memory_order_release);\n")
1086             write_c("\treturn (void*) this_arg;\n")
1087             write_c("}\n")
1088
1089             out_java.write("\t}\n")
1090
1091             out_java.write("\tpublic static native long " + struct_name + "_new(" + struct_name + " impl")
1092             write_c("static inline " + struct_name + " " + struct_name + "_init (" + consts.c_fn_args_pfx + ", jobject o")
1093             for idx, var_line in enumerate(field_var_lines):
1094                 if var_line.group(1) in trait_structs:
1095                     out_java.write(", " + var_line.group(1) + " " + var_line.group(2))
1096                     write_c(", jobject " + var_line.group(2))
1097                 else:
1098                     out_java.write(", " + field_var_convs[idx].java_ty + " " + var_line.group(2))
1099                     write_c(", " + field_var_convs[idx].c_ty + " " + var_line.group(2))
1100             out_java.write(");\n")
1101             write_c(") {\n")
1102
1103             write_c("\tjclass c = (*env)->GetObjectClass(env, o);\n")
1104             write_c("\tCHECK(c != NULL);\n")
1105             write_c("\t" + struct_name + "_JCalls *calls = MALLOC(sizeof(" + struct_name + "_JCalls), \"" + struct_name + "_JCalls\");\n")
1106             write_c("\tatomic_init(&calls->refcnt, 1);\n")
1107             write_c("\tDO_ASSERT((*env)->GetJavaVM(env, &calls->vm) == 0);\n")
1108             write_c("\tcalls->o = (*env)->NewWeakGlobalRef(env, o);\n")
1109             for (fn_line, java_meth_descr) in java_meths:
1110                 if fn_line.group(3) != "free" and fn_line.group(3) != "clone":
1111                     write_c("\tcalls->" + fn_line.group(3) + "_meth = (*env)->GetMethodID(env, c, \"" + fn_line.group(3) + "\", \"" + java_meth_descr + "\");\n")
1112                     write_c("\tCHECK(calls->" + fn_line.group(3) + "_meth != NULL);\n")
1113             for idx, var_line in enumerate(field_var_lines):
1114                 if var_line.group(1) not in trait_structs and field_var_convs[idx].arg_conv is not None:
1115                     write_c("\n\t" + field_var_convs[idx].arg_conv.replace("\n", "\n\t") +"\n")
1116             write_c("\n\t" + struct_name + " ret = {\n")
1117             write_c("\t\t.this_arg = (void*) calls,\n")
1118             for fn_line in trait_fn_lines:
1119                 if fn_line.group(3) != "free" and fn_line.group(3) != "clone":
1120                     write_c("\t\t." + fn_line.group(3) + " = " + fn_line.group(3) + "_jcall,\n")
1121                 elif fn_line.group(3) == "free":
1122                     write_c("\t\t.free = " + struct_name + "_JCalls_free,\n")
1123                 else:
1124                     write_c("\t\t.clone = " + struct_name + "_JCalls_clone,\n")
1125             for idx, var_line in enumerate(field_var_lines):
1126                 if var_line.group(1) in trait_structs:
1127                     write_c("\t\t." + var_line.group(2) + " = " + var_line.group(1) + "_init(env, clz, " + var_line.group(2) + "),\n")
1128                 elif field_var_convs[idx].arg_conv_name is not None:
1129                     write_c("\t\t." + var_line.group(2) + " = " + field_var_convs[idx].arg_conv_name + ",\n")
1130                     write_c("\t\t.set_" + var_line.group(2) + " = NULL,\n")
1131                 else:
1132                     write_c("\t\t." + var_line.group(2) + " = " + var_line.group(2) + ",\n")
1133                     write_c("\t\t.set_" + var_line.group(2) + " = NULL,\n")
1134             write_c("\t};\n")
1135             for var_line in field_var_lines:
1136                 if var_line.group(1) in trait_structs:
1137                     write_c("\tcalls->" + var_line.group(2) + " = ret." + var_line.group(2) + ".this_arg;\n")
1138             write_c("\treturn ret;\n")
1139             write_c("}\n")
1140
1141             write_c(consts.c_fn_ty_pfx + "long " + consts.c_fn_name_pfx + struct_name.replace("_", "_1") + "_1new (" + consts.c_fn_args_pfx + ", jobject o")
1142             for idx, var_line in enumerate(field_var_lines):
1143                 if var_line.group(1) in trait_structs:
1144                     write_c(", jobject " + var_line.group(2))
1145                 else:
1146                     write_c(", " + field_var_convs[idx].c_ty + " " + var_line.group(2))
1147             write_c(") {\n")
1148             write_c("\t" + struct_name + " *res_ptr = MALLOC(sizeof(" + struct_name + "), \"" + struct_name + "\");\n")
1149             write_c("\t*res_ptr = " + struct_name + "_init(env, clz, o")
1150             for var_line in field_var_lines:
1151                 write_c(", " + var_line.group(2))
1152             write_c(");\n")
1153             write_c("\treturn (long)res_ptr;\n")
1154             write_c("}\n")
1155
1156             out_java.write("\tpublic static native " + struct_name + " " + struct_name + "_get_obj_from_jcalls(long val);\n")
1157             write_c(consts.c_fn_ty_pfx + "jobject " + consts.c_fn_name_pfx + struct_name.replace("_", "_1") + "_1get_1obj_1from_1jcalls (" + consts.c_fn_args_pfx + ", " + consts.ptr_c_ty + " val) {\n")
1158             write_c("\tjobject ret = (*env)->NewLocalRef(env, ((" + struct_name + "_JCalls*)val)->o);\n")
1159             write_c("\tCHECK(ret != NULL);\n")
1160             write_c("\treturn ret;\n")
1161             write_c("}\n")
1162
1163         for fn_line in trait_fn_lines:
1164             # For now, just disable enabling the _call_log - we don't know how to inverse-map String
1165             is_log = fn_line.group(3) == "log" and struct_name == "LDKLogger"
1166             if fn_line.group(3) != "free" and fn_line.group(3) != "clone" and fn_line.group(3) != "eq" and not is_log:
1167                 dummy_line = fn_line.group(2) + struct_name.replace("LDK", "") + "_" + fn_line.group(3) + " " + struct_name + "* this_arg" + fn_line.group(5) + "\n"
1168                 map_fn(dummy_line, re.compile("([A-Za-z_0-9]*) *([A-Za-z_0-9]*) *(.*)").match(dummy_line), None, "(this_arg_conv->" + fn_line.group(3) + ")(this_arg_conv->this_arg")
1169         for idx, var_line in enumerate(field_var_lines):
1170             if var_line.group(1) not in trait_structs:
1171                 write_c(var_line.group(1) + " " + struct_name + "_set_get_" + var_line.group(2) + "(" + struct_name + "* this_arg) {\n")
1172                 write_c("\tif (this_arg->set_" + var_line.group(2) + " != NULL)\n")
1173                 write_c("\t\tthis_arg->set_" + var_line.group(2) + "(this_arg);\n")
1174                 write_c("\treturn this_arg->" + var_line.group(2) + ";\n")
1175                 write_c("}\n")
1176                 dummy_line = var_line.group(1) + " " + struct_name.replace("LDK", "") + "_get_" + var_line.group(2) + " " + struct_name + "* this_arg" + fn_line.group(5) + "\n"
1177                 map_fn(dummy_line, re.compile("([A-Za-z_0-9]*) *([A-Za-z_0-9]*) *(.*)").match(dummy_line), None, struct_name + "_set_get_" + var_line.group(2) + "(this_arg_conv")
1178
1179     def map_result(struct_name, res_ty, err_ty):
1180         result_types.add(struct_name)
1181         human_ty = struct_name.replace("LDKCResult", "Result")
1182         with open(f"{sys.argv[3]}/structs/{human_ty}{consts.file_ext}", "w") as out_java_struct:
1183             out_java_struct.write(consts.hu_struct_file_prefix)
1184             out_java_struct.write("public class " + human_ty + " extends CommonBase {\n")
1185             out_java_struct.write("\tprivate " + human_ty + "(Object _dummy, long ptr) { super(ptr); }\n")
1186             out_java_struct.write("\tprotected void finalize() throws Throwable {\n")
1187             out_java_struct.write("\t\tif (ptr != 0) { bindings." + struct_name.replace("LDK","") + "_free(ptr); } super.finalize();\n")
1188             out_java_struct.write("\t}\n\n")
1189             out_java_struct.write("\tstatic " + human_ty + " constr_from_ptr(long ptr) {\n")
1190             out_java_struct.write("\t\tif (bindings." + struct_name + "_result_ok(ptr)) {\n")
1191             out_java_struct.write("\t\t\treturn new " + human_ty + "_OK(null, ptr);\n")
1192             out_java_struct.write("\t\t} else {\n")
1193             out_java_struct.write("\t\t\treturn new " + human_ty + "_Err(null, ptr);\n")
1194             out_java_struct.write("\t\t}\n")
1195             out_java_struct.write("\t}\n")
1196
1197             res_map = map_type(res_ty + " res", True, None, False, True)
1198             err_map = map_type(err_ty + " err", True, None, False, True)
1199             can_clone = True
1200             if not res_map.is_native_primitive and (res_map.rust_obj.replace("LDK", "") + "_clone" not in clone_fns):
1201                 can_clone = False
1202             if not err_map.is_native_primitive and (err_map.rust_obj.replace("LDK", "") + "_clone" not in clone_fns):
1203                 can_clone = False
1204
1205             out_java.write("\tpublic static native boolean " + struct_name + "_result_ok(long arg);\n")
1206             write_c(consts.c_fn_ty_pfx + "jboolean " + consts.c_fn_name_pfx + struct_name.replace("_", "_1") + "_1result_1ok (" + consts.c_fn_args_pfx + ", " + consts.ptr_c_ty + " arg) {\n")
1207             write_c("\treturn ((" + struct_name + "*)arg)->result_ok;\n")
1208             write_c("}\n")
1209
1210             out_java.write("\tpublic static native " + res_map.java_ty + " " + struct_name + "_get_ok(long arg);\n")
1211             write_c(consts.c_fn_ty_pfx + res_map.c_ty + " " + consts.c_fn_name_pfx + struct_name.replace("_", "_1") + "_1get_1ok (" + consts.c_fn_args_pfx + ", " + consts.ptr_c_ty + " arg) {\n")
1212             write_c("\t" + struct_name + " *val = (" + struct_name + "*)arg;\n")
1213             write_c("\tCHECK(val->result_ok);\n\t")
1214             out_java_struct.write("\tpublic static final class " + human_ty + "_OK extends " + human_ty + " {\n")
1215             if res_map.ret_conv is not None:
1216                 write_c(res_map.ret_conv[0].replace("\n", "\n\t") + "(*val->contents.result)")
1217                 write_c(res_map.ret_conv[1].replace("\n", "\n\t") + "\n\treturn " + res_map.ret_conv_name)
1218             else:
1219                 write_c("return *val->contents.result")
1220             write_c(";\n}\n")
1221
1222             if res_map.java_hu_ty != "void":
1223                 out_java_struct.write("\t\tpublic final " + res_map.java_hu_ty + " res;\n")
1224             out_java_struct.write("\t\tprivate " + human_ty + "_OK(Object _dummy, long ptr) {\n")
1225             out_java_struct.write("\t\t\tsuper(_dummy, ptr);\n")
1226             if res_map.java_hu_ty == "void":
1227                 pass
1228             elif res_map.to_hu_conv is not None:
1229                 out_java_struct.write("\t\t\t" + res_map.java_ty + " res = bindings." + struct_name + "_get_ok(ptr);\n")
1230                 out_java_struct.write("\t\t\t" + res_map.to_hu_conv.replace("\n", "\n\t\t\t"))
1231                 out_java_struct.write("\n\t\t\tthis.res = " + res_map.to_hu_conv_name + ";\n")
1232             else:
1233                 out_java_struct.write("\t\t\tthis.res = bindings." + struct_name + "_get_ok(ptr);\n")
1234             out_java_struct.write("\t\t}\n")
1235             if struct_name.startswith("LDKCResult_None"):
1236                 out_java_struct.write("\t\tpublic " + human_ty + "_OK() {\n\t\t\tthis(null, bindings.C" + human_ty + "_ok());\n")
1237             else:
1238                 out_java_struct.write("\t\tpublic " + human_ty + "_OK(" + res_map.java_hu_ty + " res) {\n")
1239                 if res_map.from_hu_conv is not None:
1240                     out_java_struct.write("\t\t\tthis(null, bindings.C" + human_ty + "_ok(" + res_map.from_hu_conv[0] + "));\n")
1241                     if res_map.from_hu_conv[1] != "":
1242                         out_java_struct.write("\t\t\t" + res_map.from_hu_conv[1] + ";\n")
1243                 else:
1244                     out_java_struct.write("\t\t\tthis(null, bindings.C" + human_ty + "_ok(res));\n")
1245             out_java_struct.write("\t\t}\n\t}\n\n")
1246
1247             out_java.write("\tpublic static native " + err_map.java_ty + " " + struct_name + "_get_err(long arg);\n")
1248             write_c(consts.c_fn_ty_pfx + err_map.c_ty + " " + consts.c_fn_name_pfx + struct_name.replace("_", "_1") + "_1get_1err (" + consts.c_fn_args_pfx + ", " + consts.ptr_c_ty + " arg) {\n")
1249             write_c("\t" + struct_name + " *val = (" + struct_name + "*)arg;\n")
1250             write_c("\tCHECK(!val->result_ok);\n\t")
1251             out_java_struct.write("\tpublic static final class " + human_ty + "_Err extends " + human_ty + " {\n")
1252             if err_map.ret_conv is not None:
1253                 write_c(err_map.ret_conv[0].replace("\n", "\n\t") + "(*val->contents.err)")
1254                 write_c(err_map.ret_conv[1].replace("\n", "\n\t") + "\n\treturn " + err_map.ret_conv_name)
1255             else:
1256                 write_c("return *val->contents.err")
1257             write_c(";\n}\n")
1258
1259             if err_map.java_hu_ty != "void":
1260                 out_java_struct.write("\t\tpublic final " + err_map.java_hu_ty + " err;\n")
1261             out_java_struct.write("\t\tprivate " + human_ty + "_Err(Object _dummy, long ptr) {\n")
1262             out_java_struct.write("\t\t\tsuper(_dummy, ptr);\n")
1263             if err_map.java_hu_ty == "void":
1264                 pass
1265             elif err_map.to_hu_conv is not None:
1266                 out_java_struct.write("\t\t\t" + err_map.java_ty + " err = bindings." + struct_name + "_get_err(ptr);\n")
1267                 out_java_struct.write("\t\t\t" + err_map.to_hu_conv.replace("\n", "\n\t\t\t"))
1268                 out_java_struct.write("\n\t\t\tthis.err = " + err_map.to_hu_conv_name + ";\n")
1269             else:
1270                 out_java_struct.write("\t\t\tthis.err = bindings." + struct_name + "_get_err(ptr);\n")
1271             out_java_struct.write("\t\t}\n")
1272
1273             if struct_name.endswith("NoneZ"):
1274                 out_java_struct.write("\t\tpublic " + human_ty + "_Err() {\n\t\t\tthis(null, bindings.C" + human_ty + "_err());\n")
1275             else:
1276                 out_java_struct.write("\t\tpublic " + human_ty + "_Err(" + err_map.java_hu_ty + " err) {\n")
1277                 if err_map.from_hu_conv is not None:
1278                     out_java_struct.write("\t\t\tthis(null, bindings.C" + human_ty + "_err(" + err_map.from_hu_conv[0] + "));\n")
1279                     if err_map.from_hu_conv[1] != "":
1280                         out_java_struct.write("\t\t\t" + err_map.from_hu_conv[1] + ";\n")
1281                 else:
1282                     out_java_struct.write("\t\t\tthis(null, bindings.C" + human_ty + "_err(err));\n")
1283             out_java_struct.write("\t\t}\n\t}\n}\n")
1284
1285             if can_clone:
1286                 clone_fns.add(struct_name.replace("LDK", "") + "_clone")
1287                 write_c("static inline " + struct_name + " " + struct_name.replace("LDK", "") + "_clone(const " + struct_name + " *orig) {\n")
1288                 write_c("\t" + struct_name + " res = { .result_ok = orig->result_ok };\n")
1289                 write_c("\tif (orig->result_ok) {\n")
1290                 if res_map.c_ty == "void":
1291                     write_c("\t\tres.contents.result = NULL;\n")
1292                 else:
1293                     if res_map.is_native_primitive:
1294                         write_c("\t\t" + res_map.c_ty + "* contents = MALLOC(sizeof(" + res_map.c_ty + "), \"" + res_map.c_ty + " result OK clone\");\n")
1295                         write_c("\t\t*contents = *orig->contents.result;\n")
1296                     else:
1297                         write_c("\t\t" + res_map.rust_obj + "* contents = MALLOC(sizeof(" + res_map.rust_obj + "), \"" + res_map.rust_obj + " result OK clone\");\n")
1298                         write_c("\t\t*contents = " + res_map.rust_obj.replace("LDK", "") + "_clone(orig->contents.result);\n")
1299                     write_c("\t\tres.contents.result = contents;\n")
1300                 write_c("\t} else {\n")
1301                 if err_map.c_ty == "void":
1302                     write_c("\t\tres.contents.err = NULL;\n")
1303                 else:
1304                     if err_map.is_native_primitive:
1305                         write_c("\t\t" + err_map.c_ty + "* contents = MALLOC(sizeof(" + err_map.c_ty + "), \"" + err_map.c_ty + " result Err clone\");\n")
1306                         write_c("\t\t*contents = *orig->contents.err;\n")
1307                     else:
1308                         write_c("\t\t" + err_map.rust_obj + "* contents = MALLOC(sizeof(" + err_map.rust_obj + "), \"" + err_map.rust_obj + " result Err clone\");\n")
1309                         write_c("\t\t*contents = " + err_map.rust_obj.replace("LDK", "") + "_clone(orig->contents.err);\n")
1310                     write_c("\t\tres.contents.err = contents;\n")
1311                 write_c("\t}\n\treturn res;\n}\n")
1312
1313     def map_tuple(struct_name, field_lines):
1314         out_java.write("\tpublic static native long " + struct_name + "_new(")
1315         write_c(consts.c_fn_ty_pfx + consts.ptr_c_ty + " " + consts.c_fn_name_pfx + struct_name.replace("_", "_1") + "_1new(" + consts.c_fn_args_pfx)
1316         ty_list = []
1317         for idx, line in enumerate(field_lines):
1318             if idx != 0 and idx < len(field_lines) - 2:
1319                 ty_info = java_c_types(line.strip(';'), None)
1320                 if idx != 1:
1321                     out_java.write(", ")
1322                 e = chr(ord('a') + idx - 1)
1323                 out_java.write(ty_info.java_ty + " " + e)
1324                 write_c(", " + ty_info.c_ty + " " + e)
1325                 ty_list.append(ty_info)
1326         tuple_types[struct_name] = (ty_list, struct_name)
1327         out_java.write(");\n")
1328         write_c(") {\n")
1329         write_c("\t" + struct_name + "* ret = MALLOC(sizeof(" + struct_name + "), \"" + struct_name + "\");\n")
1330         can_clone = True
1331         clone_str = "static inline " + struct_name + " " + struct_name.replace("LDK", "") + "_clone(const " + struct_name + " *orig) {\n"
1332         clone_str = clone_str + "\t" + struct_name + " ret = {\n"
1333         for idx, line in enumerate(field_lines):
1334             if idx != 0 and idx < len(field_lines) - 2:
1335                 ty_info = map_type(line.strip(';'), False, None, False, False)
1336                 e = chr(ord('a') + idx - 1)
1337                 if ty_info.arg_conv is not None:
1338                     write_c("\t" + ty_info.arg_conv.replace("\n", "\n\t"))
1339                     write_c("\n\tret->" + e + " = " + ty_info.arg_conv_name + ";\n")
1340                 else:
1341                     write_c("\tret->" + e + " = " + e + ";\n")
1342                 if ty_info.arg_conv_cleanup is not None:
1343                     write_c("\t//TODO: Really need to call " + ty_info.arg_conv_cleanup + " here\n")
1344                 if not ty_info.is_native_primitive and (ty_info.rust_obj.replace("LDK", "") + "_clone") not in clone_fns:
1345                     can_clone = False
1346                 elif can_clone and ty_info.is_native_primitive:
1347                     clone_str = clone_str + "\t\t." + chr(ord('a') + idx - 1) + " = orig->" + chr(ord('a') + idx - 1) + ",\n"
1348                 elif can_clone:
1349                     clone_str = clone_str + "\t\t." + chr(ord('a') + idx - 1) + " = " + ty_info.rust_obj.replace("LDK", "") + "_clone(&orig->" + chr(ord('a') + idx - 1) + "),\n"
1350         write_c("\treturn (long)ret;\n")
1351         write_c("}\n")
1352
1353         if can_clone:
1354             clone_fns.add(struct_name.replace("LDK", "") + "_clone")
1355             write_c(clone_str)
1356             write_c("\t};\n\treturn ret;\n}\n")
1357
1358         for idx, ty_info in enumerate(ty_list):
1359             e = chr(ord('a') + idx)
1360             out_java.write("\tpublic static native " + ty_info.java_ty + " " + struct_name + "_get_" + e + "(long ptr);\n")
1361             write_c(consts.c_fn_ty_pfx + ty_info.c_ty + " " + consts.c_fn_name_pfx + struct_name.replace("_", "_1") + "_1get_1" + e + "(" + consts.c_fn_args_pfx + ", " + consts.ptr_c_ty + " ptr) {\n")
1362             write_c("\t" + struct_name + " *tuple = (" + struct_name + "*)ptr;\n")
1363             conv_info = map_type_with_info(ty_info, False, None, False, True)
1364             if conv_info.ret_conv is not None:
1365                 write_c("\t" + conv_info.ret_conv[0].replace("\n", "\n\t") + "tuple->" + e + conv_info.ret_conv[1].replace("\n", "\n\t") + "\n")
1366                 write_c("\treturn " + conv_info.ret_conv_name + ";\n")
1367             else:
1368                 write_c("\treturn tuple->" + e + ";\n")
1369             write_c("}\n")
1370
1371     out_java.write("""package org.ldk.impl;
1372 import org.ldk.enums.*;
1373
1374 public class bindings {
1375         public static class VecOrSliceDef {
1376                 public long dataptr;
1377                 public long datalen;
1378                 public long stride;
1379                 public VecOrSliceDef(long dataptr, long datalen, long stride) {
1380                         this.dataptr = dataptr; this.datalen = datalen; this.stride = stride;
1381                 }
1382         }
1383         static {
1384                 System.loadLibrary(\"lightningjni\");
1385                 init(java.lang.Enum.class, VecOrSliceDef.class);
1386                 init_class_cache();
1387         }
1388         static native void init(java.lang.Class c, java.lang.Class slicedef);
1389         static native void init_class_cache();
1390
1391         public static native boolean deref_bool(long ptr);
1392         public static native long deref_long(long ptr);
1393         public static native void free_heap_ptr(long ptr);
1394         public static native byte[] read_bytes(long ptr, long len);
1395         public static native byte[] get_u8_slice_bytes(long slice_ptr);
1396         public static native long bytes_to_u8_vec(byte[] bytes);
1397         public static native long new_txpointer_copy_data(byte[] txdata);
1398         public static native void txpointer_free(long ptr);
1399         public static native byte[] txpointer_get_buffer(long ptr);
1400         public static native long vec_slice_len(long vec);
1401         public static native long new_empty_slice_vec();
1402
1403 """)
1404
1405     with open(f"{sys.argv[3]}/structs/CommonBase{consts.file_ext}", "a") as out_java_struct:
1406         out_java_struct.write(consts.common_base)
1407
1408     in_block_comment = False
1409     cur_block_obj = None
1410
1411     const_val_regex = re.compile("^extern const ([A-Za-z_0-9]*) ([A-Za-z_0-9]*);$")
1412
1413     line_indicates_result_regex = re.compile("^   union (LDKCResult_[A-Za-z_0-9]*Ptr) contents;$")
1414     line_indicates_vec_regex = re.compile("^   (struct |enum |union )?([A-Za-z_0-9]*) \*data;$")
1415     line_indicates_opaque_regex = re.compile("^   bool is_owned;$")
1416     line_indicates_trait_regex = re.compile("^   (struct |enum |union )?([A-Za-z_0-9]* \*?)\(\*([A-Za-z_0-9]*)\)\((const )?void \*this_arg(.*)\);$")
1417     assert(line_indicates_trait_regex.match("   uintptr_t (*send_data)(void *this_arg, LDKu8slice data, bool resume_read);"))
1418     assert(line_indicates_trait_regex.match("   struct LDKCVec_MessageSendEventZ (*get_and_clear_pending_msg_events)(const void *this_arg);"))
1419     assert(line_indicates_trait_regex.match("   void *(*clone)(const void *this_arg);"))
1420     assert(line_indicates_trait_regex.match("   struct LDKCVec_u8Z (*write)(const void *this_arg);"))
1421     line_field_var_regex = re.compile("^   struct ([A-Za-z_0-9]*) ([A-Za-z_0-9]*);$")
1422     assert(line_field_var_regex.match("   struct LDKMessageSendEventsProvider MessageSendEventsProvider;"))
1423     assert(line_field_var_regex.match("   struct LDKChannelPublicKeys pubkeys;"))
1424     struct_name_regex = re.compile("^typedef (struct|enum|union) (MUST_USE_STRUCT )?(LDK[A-Za-z_0-9]*) {$")
1425     assert(struct_name_regex.match("typedef struct LDKCVec_u8Z {"))
1426     assert(struct_name_regex.match("typedef enum LDKNetwork {"))
1427
1428     union_enum_items = {}
1429     result_ptr_struct_items = {}
1430     for line in in_h:
1431         if in_block_comment:
1432             if line.endswith("*/\n"):
1433                 in_block_comment = False
1434         elif cur_block_obj is not None:
1435             cur_block_obj  = cur_block_obj + line
1436             if line.startswith("} "):
1437                 field_lines = []
1438                 struct_name = None
1439                 vec_ty = None
1440                 obj_lines = cur_block_obj.split("\n")
1441                 is_opaque = False
1442                 result_contents = None
1443                 is_unitary_enum = False
1444                 is_union_enum = False
1445                 is_union = False
1446                 is_tuple = False
1447                 trait_fn_lines = []
1448                 field_var_lines = []
1449
1450                 for idx, struct_line in enumerate(obj_lines):
1451                     if struct_line.strip().startswith("/*"):
1452                         in_block_comment = True
1453                     if in_block_comment:
1454                         if struct_line.endswith("*/"):
1455                             in_block_comment = False
1456                     else:
1457                         struct_name_match = struct_name_regex.match(struct_line)
1458                         if struct_name_match is not None:
1459                             struct_name = struct_name_match.group(3)
1460                             if struct_name_match.group(1) == "enum":
1461                                 if not struct_name.endswith("_Tag"):
1462                                     is_unitary_enum = True
1463                                 else:
1464                                     is_union_enum = True
1465                             elif struct_name_match.group(1) == "union":
1466                                 is_union = True
1467                         if line_indicates_opaque_regex.match(struct_line):
1468                             is_opaque = True
1469                         result_match = line_indicates_result_regex.match(struct_line)
1470                         if result_match is not None:
1471                             result_contents = result_match.group(1)
1472                         vec_ty_match = line_indicates_vec_regex.match(struct_line)
1473                         if vec_ty_match is not None and struct_name.startswith("LDKCVec_"):
1474                             vec_ty = vec_ty_match.group(2)
1475                         elif struct_name.startswith("LDKC2Tuple_") or struct_name.startswith("LDKC3Tuple_"):
1476                             is_tuple = True
1477                         trait_fn_match = line_indicates_trait_regex.match(struct_line)
1478                         if trait_fn_match is not None:
1479                             trait_fn_lines.append(trait_fn_match)
1480                         field_var_match = line_field_var_regex.match(struct_line)
1481                         if field_var_match is not None:
1482                             field_var_lines.append(field_var_match)
1483                         field_lines.append(struct_line)
1484
1485                 assert(struct_name is not None)
1486                 assert(len(trait_fn_lines) == 0 or not (is_opaque or is_unitary_enum or is_union_enum or is_union or result_contents is not None or vec_ty is not None))
1487                 assert(not is_opaque or not (len(trait_fn_lines) != 0 or is_unitary_enum or is_union_enum or is_union or result_contents is not None or vec_ty is not None))
1488                 assert(not is_unitary_enum or not (len(trait_fn_lines) != 0 or is_opaque or is_union_enum or is_union or result_contents is not None or vec_ty is not None))
1489                 assert(not is_union_enum or not (len(trait_fn_lines) != 0 or is_unitary_enum or is_opaque or is_union or result_contents is not None or vec_ty is not None))
1490                 assert(not is_union or not (len(trait_fn_lines) != 0 or is_unitary_enum or is_union_enum or is_opaque or result_contents is not None or vec_ty is not None))
1491                 assert(result_contents is None or not (len(trait_fn_lines) != 0 or is_unitary_enum or is_union_enum or is_opaque or is_union or vec_ty is not None))
1492                 assert(vec_ty is None or not (len(trait_fn_lines) != 0 or is_unitary_enum or is_union_enum or is_opaque or is_union or result_contents is not None))
1493
1494                 if is_opaque:
1495                     opaque_structs.add(struct_name)
1496                     with open(f"{sys.argv[3]}/structs/{struct_name.replace('LDK', '')}{consts.file_ext}", "w") as out_java_struct:
1497                         out_java_struct.write(consts.hu_struct_file_prefix)
1498                         out_java_struct.write("public class " + struct_name.replace("LDK","") + " extends CommonBase")
1499                         if struct_name.startswith("LDKLocked"):
1500                             out_java_struct.write(" implements AutoCloseable")
1501                         out_java_struct.write(" {\n")
1502                         out_java_struct.write("\t" + struct_name.replace("LDK", "") + "(Object _dummy, long ptr) { super(ptr); }\n")
1503                         if struct_name.startswith("LDKLocked"):
1504                             out_java_struct.write("\t@Override public void close() {\n")
1505                         else:
1506                             out_java_struct.write("\t@Override @SuppressWarnings(\"deprecation\")\n")
1507                             out_java_struct.write("\tprotected void finalize() throws Throwable {\n")
1508                             out_java_struct.write("\t\tsuper.finalize();\n")
1509                         out_java_struct.write("\t\tif (ptr != 0) { bindings." + struct_name.replace("LDK","") + "_free(ptr); }\n")
1510                         out_java_struct.write("\t}\n\n")
1511                 elif result_contents is not None:
1512                     assert result_contents in result_ptr_struct_items
1513                     res_ty, err_ty = result_ptr_struct_items[result_contents]
1514                     map_result(struct_name, res_ty, err_ty)
1515                 elif struct_name.startswith("LDKCResult_") and struct_name.endswith("ZPtr"):
1516                     for line in field_lines:
1517                         if line.endswith("*result;"):
1518                             res_ty = line[:-8].strip()
1519                         elif line.endswith("*err;"):
1520                             err_ty = line[:-5].strip()
1521                     result_ptr_struct_items[struct_name] = (res_ty, err_ty)
1522                     result_types.add(struct_name[:-3])
1523                 elif is_tuple:
1524                     map_tuple(struct_name, field_lines)
1525                 elif vec_ty is not None:
1526                     ty_info = map_type(vec_ty + " arr_elem", False, None, False, False)
1527                     if len(ty_info.java_fn_ty_arg) == 1: # ie we're a primitive of some form
1528                         out_java.write("\tpublic static native long " + struct_name + "_new(" + ty_info.java_ty + "[] elems);\n")
1529                         write_c(consts.c_fn_ty_pfx + consts.ptr_c_ty + " " + consts.c_fn_name_pfx + struct_name.replace("_", "_1") + "_1new(" + consts.c_fn_args_pfx + ", " + ty_info.c_ty + "Array elems) {\n")
1530                         write_c("\t" + struct_name + " *ret = MALLOC(sizeof(" + struct_name + "), \"" + struct_name + "\");\n")
1531                         write_c("\tret->datalen = " + consts.get_native_arr_len_call[0] + "elems" + consts.get_native_arr_len_call[1] + ";\n")
1532                         write_c("\tif (ret->datalen == 0) {\n")
1533                         write_c("\t\tret->data = NULL;\n")
1534                         write_c("\t} else {\n")
1535                         write_c("\t\tret->data = MALLOC(sizeof(" + vec_ty + ") * ret->datalen, \"" + struct_name + " Data\");\n")
1536                         write_c("\t\t" + ty_info.c_ty + " *java_elems = " + consts.get_native_arr_ptr_call[0] + "elems" + consts.get_native_arr_ptr_call[1] + ";\n")
1537                         write_c("\t\tfor (size_t i = 0; i < ret->datalen; i++) {\n")
1538                         if ty_info.arg_conv is not None:
1539                             write_c("\t\t\t" + ty_info.c_ty + " arr_elem = java_elems[i];\n")
1540                             write_c("\t\t\t" + ty_info.arg_conv.replace("\n", "\n\t\t\t") + "\n")
1541                             write_c("\t\t\tret->data[i] = " + ty_info.arg_conv_name + ";\n")
1542                             assert ty_info.arg_conv_cleanup is None
1543                         else:
1544                             write_c("\t\t\tret->data[i] = java_elems[i];\n")
1545                         write_c("\t\t}\n")
1546                         cleanup = consts.release_native_arr_ptr_call("elems", "java_elems")
1547                         if cleanup is not None:
1548                             write_c("\t\t" + cleanup + ";\n")
1549                         write_c("\t}\n")
1550                         write_c("\treturn (long)ret;\n")
1551                         write_c("}\n")
1552
1553                     if ty_info.is_native_primitive:
1554                         clone_fns.add(struct_name.replace("LDK", "") + "_clone")
1555                         write_c("static inline " + struct_name + " " + struct_name.replace("LDK", "") + "_clone(const " + struct_name + " *orig) {\n")
1556                         write_c("\t" + struct_name + " ret = { .data = MALLOC(sizeof(" + ty_info.c_ty + ") * orig->datalen, \"" + struct_name + " clone bytes\"), .datalen = orig->datalen };\n")
1557                         write_c("\tmemcpy(ret.data, orig->data, sizeof(" + ty_info.c_ty + ") * ret.datalen);\n")
1558                         write_c("\treturn ret;\n}\n")
1559                     elif (ty_info.rust_obj.replace("LDK", "") + "_clone") in clone_fns:
1560                         ty_name = "CVec_" + ty_info.rust_obj.replace("LDK", "") + "Z";
1561                         clone_fns.add(ty_name + "_clone")
1562                         write_c("static inline " + struct_name + " " + ty_name + "_clone(const " + struct_name + " *orig) {\n")
1563                         write_c("\t" + struct_name + " ret = { .data = MALLOC(sizeof(" + ty_info.rust_obj + ") * orig->datalen, \"" + struct_name + " clone bytes\"), .datalen = orig->datalen };\n")
1564                         write_c("\tfor (size_t i = 0; i < ret.datalen; i++) {\n")
1565                         write_c("\t\tret.data[i] = " + ty_info.rust_obj.replace("LDK", "") + "_clone(&orig->data[i]);\n")
1566                         write_c("\t}\n\treturn ret;\n}\n")
1567                 elif is_union_enum:
1568                     assert(struct_name.endswith("_Tag"))
1569                     struct_name = struct_name[:-4]
1570                     union_enum_items[struct_name] = {"field_lines": field_lines}
1571                 elif struct_name.endswith("_Body") and struct_name.split("_")[0] in union_enum_items:
1572                     enum_var_name = struct_name.split("_")
1573                     union_enum_items[enum_var_name[0]][enum_var_name[1]] = field_lines
1574                 elif struct_name in union_enum_items:
1575                     map_complex_enum(struct_name, union_enum_items[struct_name])
1576                 elif is_unitary_enum:
1577                     map_unitary_enum(struct_name, field_lines)
1578                 elif len(trait_fn_lines) > 0:
1579                     trait_structs.add(struct_name)
1580                     map_trait(struct_name, field_var_lines, trait_fn_lines)
1581                 elif struct_name == "LDKTxOut":
1582                     with open(f"{sys.argv[3]}/structs/TxOut{consts.file_ext}", "w") as out_java_struct:
1583                         out_java_struct.write(consts.hu_struct_file_prefix)
1584                         out_java_struct.write("public class TxOut extends CommonBase{\n")
1585                         out_java_struct.write("\tTxOut(java.lang.Object _dummy, long ptr) { super(ptr); }\n")
1586                         out_java_struct.write("\tlong to_c_ptr() { return 0; }\n")
1587                         out_java_struct.write("\t@Override @SuppressWarnings(\"deprecation\")\n")
1588                         out_java_struct.write("\tprotected void finalize() throws Throwable {\n")
1589                         out_java_struct.write("\t\tsuper.finalize();\n")
1590                         out_java_struct.write("\t\tif (ptr != 0) { bindings.TxOut_free(ptr); }\n")
1591                         out_java_struct.write("\t}\n")
1592                         # TODO: TxOut body
1593                         out_java_struct.write("}")
1594                 else:
1595                     pass # Everything remaining is a byte[] or some form
1596                 cur_block_obj = None
1597         else:
1598             fn_ptr = fn_ptr_regex.match(line)
1599             fn_ret_arr = fn_ret_arr_regex.match(line)
1600             reg_fn = reg_fn_regex.match(line)
1601             const_val = const_val_regex.match(line)
1602
1603             if line.startswith("#include <"):
1604                 pass
1605             elif line.startswith("/*"):
1606                 #out_java.write("\t" + line)
1607                 if not line.endswith("*/\n"):
1608                     in_block_comment = True
1609             elif line.startswith("typedef enum "):
1610                 cur_block_obj = line
1611             elif line.startswith("typedef struct "):
1612                 cur_block_obj = line
1613             elif line.startswith("typedef union "):
1614                 cur_block_obj = line
1615             elif fn_ptr is not None:
1616                 map_fn(line, fn_ptr, None, None)
1617             elif fn_ret_arr is not None:
1618                 map_fn(line, fn_ret_arr, fn_ret_arr.group(4), None)
1619             elif reg_fn is not None:
1620                 map_fn(line, reg_fn, None, None)
1621             elif const_val_regex is not None:
1622                 # TODO Map const variables
1623                 pass
1624             else:
1625                 assert(line == "\n")
1626
1627     out_java.write("}\n")
1628     for struct_name in opaque_structs:
1629         with open(f"{sys.argv[3]}/structs/{struct_name.replace('LDK', '')}{consts.file_ext}", "a") as out_java_struct:
1630             out_java_struct.write("}\n")
1631     for struct_name in trait_structs:
1632         with open(f"{sys.argv[3]}/structs/{struct_name.replace('LDK', '')}{consts.file_ext}", "a") as out_java_struct:
1633             out_java_struct.write("}\n")
1634 with open(sys.argv[4], "w") as out_c:
1635     out_c.write(consts.c_file_pfx)
1636     out_c.write(consts.init_str(c_array_class_caches))
1637     out_c.write(c_file)