_ 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     mapped_type = []
 174     java_type_plural = None
 175     if fn_arg.startswith("void"):
 176         java_ty = "void"
 177         c_ty = "void"
 178         fn_ty_arg = "V"
 179         fn_arg = fn_arg[4:].strip()
 180         is_primitive = True
 181     elif fn_arg.startswith("bool"):
 182         java_ty = "boolean"
 183         c_ty = "jboolean"
 184         fn_ty_arg = "Z"
 185         fn_arg = fn_arg[4:].strip()
 186         is_primitive = True
 187     elif fn_arg.startswith("uint8_t"):
 188         mapped_type = consts.c_type_map['byte']
 189         java_ty = mapped_type[0]
 190         c_ty = "int8_t"
 191         fn_ty_arg = "B"
 192         fn_arg = fn_arg[7:].strip()
 193         is_primitive = True
 194     elif fn_arg.startswith("uint16_t"):
 195         java_ty = "short"
 196         c_ty = "jshort"
 197         fn_ty_arg = "S"
 198         fn_arg = fn_arg[8:].strip()
 199         is_primitive = True
 200     elif fn_arg.startswith("uint32_t"):
 201         java_ty = "int"
 202         c_ty = "int32_t"
 203         fn_ty_arg = "I"
 204         fn_arg = fn_arg[8:].strip()
 205         is_primitive = True
 206     elif fn_arg.startswith("uint64_t") or fn_arg.startswith("uintptr_t"):
 207         # TODO: uintptr_t is arch-dependent :(
 208         java_ty = "long"
 209         c_ty = "int64_t"
 210         fn_ty_arg = "J"
 211         if fn_arg.startswith("uint64_t"):
 212             fn_arg = fn_arg[8:].strip()
 213         else:
 214             fn_arg = fn_arg[9:].strip()
 215         is_primitive = True
 216     elif is_const and fn_arg.startswith("char *"):
 217         java_ty = "String"
 218         c_ty = "const char*"
 219         fn_ty_arg = "Ljava/lang/String;"
 220         fn_arg = fn_arg[6:].strip()
 221     elif fn_arg.startswith("LDKStr"):
 222         java_ty = "String"
 223         c_ty = "jstring"
 224         fn_ty_arg = "Ljava/lang/String;"
 225         fn_arg = fn_arg[6:].strip()
 226         arr_access = "chars"
 227         arr_len = "len"
 228     else:
 229         ma = var_ty_regex.match(fn_arg)
 230         if ma.group(1).strip() in unitary_enums:
 231             java_ty = ma.group(1).strip()
 232             c_ty = consts.result_c_ty
 233             fn_ty_arg = "Lorg/ldk/enums/" + ma.group(1).strip() + ";"
 234             fn_arg = ma.group(2).strip()
 235             rust_obj = ma.group(1).strip()
 236         elif ma.group(1).strip().startswith("LDKC2Tuple"):
 237             c_ty = consts.ptr_c_ty
 238             java_ty = consts.ptr_native_ty
 239             java_hu_ty = "TwoTuple<"
 240             if not ma.group(1).strip() in tuple_types:
 241                 assert java_c_types_none_allowed
 242                 return None
 243             for idx, ty_info in enumerate(tuple_types[ma.group(1).strip()][0]):
 244                 if idx != 0:
 245                     java_hu_ty = java_hu_ty + ", "
 246                 if ty_info.is_native_primitive:
 247                     if ty_info.java_hu_ty == "int":
 248                         java_hu_ty = java_hu_ty + "Integer" # Java concrete integer type is Integer, not Int
 249                     else:
 250                         java_hu_ty = java_hu_ty + ty_info.java_hu_ty.title() # If we're a primitive, capitalize the first letter
 251                 else:
 252                     java_hu_ty = java_hu_ty + ty_info.java_hu_ty
 253             java_hu_ty = java_hu_ty + ">"
 254             fn_ty_arg = "J"
 255             fn_arg = ma.group(2).strip()
 256             rust_obj = ma.group(1).strip()
 257             take_by_ptr = True
 258         elif ma.group(1).strip().startswith("LDKC3Tuple"):
 259             c_ty = consts.ptr_c_ty
 260             java_ty = consts.ptr_native_ty
 261             java_hu_ty = "ThreeTuple<"
 262             if not ma.group(1).strip() in tuple_types:
 263                 assert java_c_types_none_allowed
 264                 return None
 265             for idx, ty_info in enumerate(tuple_types[ma.group(1).strip()][0]):
 266                 if idx != 0:
 267                     java_hu_ty = java_hu_ty + ", "
 268                 if ty_info.is_native_primitive:
 269                     if ty_info.java_hu_ty == "int":
 270                         java_hu_ty = java_hu_ty + "Integer" # Java concrete integer type is Integer, not Int
 271                     else:
 272                         java_hu_ty = java_hu_ty + ty_info.java_hu_ty.title() # If we're a primitive, capitalize the first letter
 273                 else:
 274                     java_hu_ty = java_hu_ty + ty_info.java_hu_ty
 275             java_hu_ty = java_hu_ty + ">"
 276             fn_ty_arg = "J"
 277             fn_arg = ma.group(2).strip()
 278             rust_obj = ma.group(1).strip()
 279             take_by_ptr = True
 280         else:
 281             c_ty = consts.ptr_c_ty
 282             java_ty = consts.ptr_native_ty
 283             java_hu_ty = ma.group(1).strip().replace("LDKCResult", "Result").replace("LDK", "")
 284             fn_ty_arg = "J"
 285             fn_arg = ma.group(2).strip()
 286             rust_obj = ma.group(1).strip()
 287             take_by_ptr = True
 288
 289     if fn_arg.startswith(" *") or fn_arg.startswith("*"):
 290         fn_arg = fn_arg.replace("*", "").strip()
 291         is_ptr = True
 292         c_ty = consts.ptr_c_ty
 293         java_ty = consts.ptr_native_ty
 294         fn_ty_arg = "J"
 295         is_primitive = False
 296
 297     var_is_arr = var_is_arr_regex.match(fn_arg)
 298     if var_is_arr is not None or ret_arr_len is not None:
 299         assert(not take_by_ptr)
 300         assert(not is_ptr)
 301         # is there a special case for plurals?
 302         if len(mapped_type) == 2:
 303             java_ty = mapped_type[1]
 304         else:
 305             java_ty = java_ty + "[]"
 306         c_ty = c_ty + "Array"
 307         if var_is_arr is not None:
 308             if var_is_arr.group(1) == "":
 309                 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,
 310                     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)
 311             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,
 312                 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)
 313
 314     if java_hu_ty is None:
 315         java_hu_ty = java_ty
 316     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,
 317         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)
 318
 319 fn_ptr_regex = re.compile("^extern const ([A-Za-z_0-9\* ]*) \(\*(.*)\)\((.*)\);$")
 320 fn_ret_arr_regex = re.compile("(.*) \(\*(.*)\((.*)\)\)\[([0-9]*)\];$")
 321 reg_fn_regex = re.compile("([A-Za-z_0-9\* ]* \*?)([a-zA-Z_0-9]*)\((.*)\);$")
 322 clone_fns = set()
 323 constructor_fns = {}
 324 c_array_class_caches = set()
 325 with open(sys.argv[1]) as in_h:
 326     for line in in_h:
 327         reg_fn = reg_fn_regex.match(line)
 328         if reg_fn is not None:
 329             if reg_fn.group(2).endswith("_clone"):
 330                 clone_fns.add(reg_fn.group(2))
 331             else:
 332                 rty = java_c_types(reg_fn.group(1), None)
 333                 if rty is not None and rty.rust_obj is not None and reg_fn.group(2) == rty.java_hu_ty + "_new":
 334                     constructor_fns[rty.rust_obj] = reg_fn.group(3)
 335             continue
 336         arr_fn = fn_ret_arr_regex.match(line)
 337         if arr_fn is not None:
 338             if arr_fn.group(2).endswith("_clone"):
 339                 clone_fns.add(arr_fn.group(2))
 340             # No object constructors return arrays, as then they wouldn't be an object constructor
 341             continue
 342
 343 # Define some manual clones...
 344 clone_fns.add("ThirtyTwoBytes_clone")
 345 write_c("static inline struct LDKThirtyTwoBytes ThirtyTwoBytes_clone(const struct LDKThirtyTwoBytes *orig) { struct LDKThirtyTwoBytes ret; memcpy(ret.data, orig->data, 32); return ret; }\n")
 346
 347 java_c_types_none_allowed = False # C structs created by cbindgen are declared in dependency order
 348
 349 with open(sys.argv[1]) as in_h, open(sys.argv[2], "w") as out_java:
 350     def map_type(fn_arg, print_void, ret_arr_len, is_free, holds_ref):
 351         ty_info = java_c_types(fn_arg, ret_arr_len)
 352         return map_type_with_info(ty_info, print_void, ret_arr_len, is_free, holds_ref)
 353
 354     def map_type_with_info(ty_info, print_void, ret_arr_len, is_free, holds_ref):
 355         if ty_info.c_ty == "void":
 356             if not print_void:
 357                 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 358                     arg_conv = None, arg_conv_name = None, arg_conv_cleanup = None,
 359                     ret_conv = None, ret_conv_name = None, to_hu_conv = None, to_hu_conv_name = None, from_hu_conv = None)
 360         if ty_info.c_ty.endswith("Array"):
 361             arr_len = ty_info.arr_len
 362             if arr_len is not None:
 363                 arr_name = ty_info.var_name
 364             else:
 365                 arr_name = "ret"
 366                 arr_len = ret_arr_len
 367             if ty_info.c_ty == "int8_tArray":
 368                 (set_pfx, set_sfx) = consts.set_native_arr_contents(arr_name + "_arr", arr_len, ty_info)
 369                 ret_conv = ("int8_tArray " + arr_name + "_arr = " + consts.create_native_arr_call(arr_len, ty_info) + ";\n" + set_pfx, "")
 370                 arg_conv_cleanup = None
 371                 if not arr_len.isdigit():
 372                     arg_conv = ty_info.rust_obj + " " + arr_name + "_ref;\n"
 373                     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"
 374                     if (not ty_info.is_ptr or not holds_ref) and ty_info.rust_obj != "LDKu8slice":
 375                         arg_conv = arg_conv + arr_name + "_ref." + ty_info.arr_access + " = MALLOC(" + arr_name + "_ref." + arr_len + ", \"" + ty_info.rust_obj + " Bytes\");\n"
 376                         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) + ";"
 377                     else:
 378                         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) + ";"
 379                         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)
 380                     if ty_info.rust_obj == "LDKTransaction":
 381                         arg_conv = arg_conv + "\n" + arr_name + "_ref.data_is_owned = " + str(holds_ref).lower() + ";"
 382                     ret_conv = (ty_info.rust_obj + " " + arr_name + "_var = ", "")
 383                     ret_conv = (ret_conv[0], ";\nint8_tArray " + arr_name + "_arr = " + consts.create_native_arr_call(arr_name + "_var." + arr_len, ty_info) + ";\n")
 384                     (pfx, sfx) = consts.set_native_arr_contents(arr_name + "_arr", arr_name + "_var." + arr_len, ty_info)
 385                     ret_conv = (ret_conv[0], ret_conv[1] + pfx + arr_name + "_var." + ty_info.arr_access + sfx + ";")
 386                     if not holds_ref and ty_info.rust_obj != "LDKu8slice":
 387                         ret_conv = (ret_conv[0], ret_conv[1] + "\n" + ty_info.rust_obj.replace("LDK", "") + "_free(" + arr_name + "_var);")
 388                 elif ty_info.rust_obj is not None:
 389                     arg_conv = ty_info.rust_obj + " " + arr_name + "_ref;\n"
 390                     arg_conv = arg_conv + "CHECK(" + consts.get_native_arr_len_call[0] + arr_name + consts.get_native_arr_len_call[1] + " == " + arr_len + ");\n"
 391                     arg_conv = arg_conv + consts.get_native_arr_contents(arr_name, arr_name + "_ref." + ty_info.arr_access, arr_len, ty_info, True) + ";"
 392                     ret_conv = (ret_conv[0], "." + ty_info.arr_access + set_sfx + ";")
 393                 else:
 394                     arg_conv = "unsigned char " + arr_name + "_arr[" + arr_len + "];\n"
 395                     arg_conv = arg_conv + "CHECK(" + consts.get_native_arr_len_call[0] + arr_name + consts.get_native_arr_len_call[1] + " == " + arr_len + ");\n"
 396                     arg_conv = arg_conv + consts.get_native_arr_contents(arr_name, arr_name + "_arr", arr_len, ty_info, True) + ";\n"
 397                     arg_conv = arg_conv + "unsigned char (*" + arr_name + "_ref)[" + arr_len + "] = &" + arr_name + "_arr;"
 398                     ret_conv = (ret_conv[0] + "*", set_sfx + ";")
 399                 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 400                     arg_conv = arg_conv, arg_conv_name = arr_name + "_ref", arg_conv_cleanup = arg_conv_cleanup,
 401                     ret_conv = ret_conv, ret_conv_name = arr_name + "_arr", to_hu_conv = None, to_hu_conv_name = None, from_hu_conv = None)
 402             else:
 403                 assert not arr_len.isdigit() # fixed length arrays not implemented
 404                 assert ty_info.java_ty[len(ty_info.java_ty) - 2:] == "[]"
 405                 conv_name = "arr_conv_" + str(len(ty_info.java_hu_ty))
 406                 idxc = chr(ord('a') + (len(ty_info.java_hu_ty) % 26))
 407                 ty_info.subty.var_name = conv_name
 408                 #XXX: We'd really prefer to only ever set to False, avoiding lots of clone, but need smarter free logic
 409                 #if ty_info.is_ptr or holds_ref:
 410                 #    ty_info.subty.requires_clone = False
 411                 ty_info.subty.requires_clone = not ty_info.is_ptr or not holds_ref
 412                 subty = map_type_with_info(ty_info.subty, False, None, is_free, holds_ref)
 413                 if arr_name == "":
 414                     arr_name = "arg"
 415                 arg_conv = ty_info.rust_obj + " " + arr_name + "_constr;\n"
 416                 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"
 417                 arg_conv = arg_conv + "if (" + arr_name + "_constr." + arr_len + " > 0)\n"
 418                 if subty.rust_obj is None:
 419                     szof = subty.c_ty
 420                 else:
 421                     szof = subty.rust_obj
 422                 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"
 423                 arg_conv = arg_conv + "else\n"
 424                 arg_conv = arg_conv + "\t" + arr_name + "_constr." + ty_info.arr_access + " = NULL;\n"
 425                 get_arr = consts.get_native_arr_contents(arr_name, "NO_DEST", arr_name + "_constr." + arr_len, ty_info, False)
 426                 if get_arr != None:
 427                     arg_conv = arg_conv + subty.c_ty + "* " + arr_name + "_vals = " + get_arr + ";\n"
 428                 arg_conv = arg_conv + "for (size_t " + idxc + " = 0; " + idxc + " < " + arr_name + "_constr." + arr_len + "; " + idxc + "++) {\n"
 429                 if get_arr != None:
 430                     arg_conv = arg_conv + "\t" + subty.c_ty + " " + conv_name + " = " + arr_name + "_vals[" + idxc + "];"
 431                     if subty.arg_conv is not None:
 432                         arg_conv = arg_conv + "\n\t" + subty.arg_conv.replace("\n", "\n\t")
 433                 else:
 434                     arg_conv = arg_conv + "\t" + subty.c_ty + " " + conv_name + " = " + consts.get_native_arr_elem(arr_name, idxc, ty_info) + ";\n"
 435                     arg_conv = arg_conv + "\t" + subty.arg_conv.replace("\n", "\n\t")
 436                 arg_conv = arg_conv + "\n\t" + arr_name + "_constr." + ty_info.arr_access + "[" + idxc + "] = " + subty.arg_conv_name + ";\n}"
 437                 if get_arr != None:
 438                     cleanup = consts.cleanup_native_arr_ref_contents(arr_name, arr_name + "_vals", arr_name + "_constr." + arr_len, ty_info)
 439                     if cleanup is not None:
 440                         arg_conv = arg_conv + "\n" + cleanup + ";"
 441                 if ty_info.is_ptr:
 442                     arg_conv_name = "&" + arr_name + "_constr"
 443                 else:
 444                     arg_conv_name = arr_name + "_constr"
 445                 arg_conv_cleanup = None
 446                 if ty_info.is_ptr:
 447                     arg_conv_cleanup = "FREE(" + arr_name + "_constr." + ty_info.arr_access + ");"
 448
 449                 if arr_name == "arg":
 450                     arr_name = "ret"
 451                 ret_conv = (ty_info.rust_obj + " " + arr_name + "_var = ", "")
 452                 if subty.ret_conv is None:
 453                     ret_conv = ("DUMMY", "DUMMY")
 454                 elif not ty_info.java_ty[:len(ty_info.java_ty) - 2].endswith("[]"):
 455                     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")
 456                     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")
 457                     ret_conv = (ret_conv[0], ret_conv[1] + "for (size_t " + idxc + " = 0; " + idxc + " < " + arr_name + "_var." + arr_len + "; " + idxc + "++) {\n")
 458                     ret_conv = (ret_conv[0], ret_conv[1] + "\t" + subty.ret_conv[0].replace("\n", "\n\t"))
 459                     ret_conv = (ret_conv[0], ret_conv[1] + arr_name + "_var." + ty_info.arr_access + "[" + idxc + "]" + subty.ret_conv[1].replace("\n", "\n\t"))
 460                     ret_conv = (ret_conv[0], ret_conv[1] + "\n\t" + arr_name + "_arr_ptr[" + idxc + "] = " + subty.ret_conv_name + ";\n}")
 461                     cleanup = consts.release_native_arr_ptr_call(arr_name + "_arr", arr_name + "_arr_ptr")
 462                     if cleanup is not None:
 463                         ret_conv = (ret_conv[0], ret_conv[1] + "\n" + cleanup + ";")
 464                 else:
 465                     assert ty_info.java_fn_ty_arg.startswith("[")
 466                     clz_var = ty_info.java_fn_ty_arg[1:].replace("[", "arr_of_")
 467                     c_array_class_caches.add(clz_var)
 468                     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")
 469                     ret_conv = (ret_conv[0], ret_conv[1] + "for (size_t " + idxc + " = 0; " + idxc + " < " + arr_name + "_var." + arr_len + "; " + idxc + "++) {\n")
 470                     ret_conv = (ret_conv[0], ret_conv[1] + "\t" + subty.ret_conv[0].replace("\n", "\n\t"))
 471                     ret_conv = (ret_conv[0], ret_conv[1] + arr_name + "_var." + ty_info.arr_access + "[" + idxc + "]" + subty.ret_conv[1].replace("\n", "\n\t"))
 472                     ret_conv = (ret_conv[0], ret_conv[1] + "\n\t(*env)->SetObjectArrayElement(env, " + arr_name + "_arr, " + idxc + ", " + subty.ret_conv_name + ");\n")
 473                     ret_conv = (ret_conv[0], ret_conv[1] + "}")
 474                 if not holds_ref:
 475                     # XXX: The commented if's are a bit smarter freeing, but we need to be a nudge smarter still
 476                     # Note that we don't drop the full vec here - we're passing ownership to java (or have cloned) or free'd by now!
 477                     ret_conv = (ret_conv[0], ret_conv[1] + "\nFREE(" + arr_name + "_var." + ty_info.arr_access + ");")
 478                     #if subty.rust_obj is not None and subty.rust_obj in opaque_structs:
 479                     #    ret_conv = (ret_conv[0], ret_conv[1] + "\nFREE(" + arr_name + "_var." + ty_info.arr_access + ");")
 480                     #else:
 481                     #    ret_conv = (ret_conv[0], ret_conv[1] + "\n" + ty_info.rust_obj.replace("LDK", "") + "_free(" + arr_name + "_var);")
 482
 483                 to_hu_conv = None
 484                 to_hu_conv_name = None
 485                 if subty.to_hu_conv is not None:
 486                     to_hu_conv = ty_info.java_hu_ty + " " + conv_name + "_arr = new " + ty_info.subty.java_hu_ty.split("<")[0] + "[" + arr_name + ".length];\n"
 487                     to_hu_conv = to_hu_conv + "for (int " + idxc + " = 0; " + idxc + " < " + arr_name + ".length; " + idxc + "++) {\n"
 488                     to_hu_conv = to_hu_conv + "\t" + subty.java_ty + " " + conv_name + " = " + arr_name + "[" + idxc + "];\n"
 489                     to_hu_conv = to_hu_conv + "\t" + subty.to_hu_conv.replace("\n", "\n\t") + "\n"
 490                     to_hu_conv = to_hu_conv + "\t" + conv_name + "_arr[" + idxc + "] = " + subty.to_hu_conv_name + ";\n}"
 491                     to_hu_conv_name = conv_name + "_arr"
 492                 from_hu_conv = None
 493                 if subty.from_hu_conv is not None:
 494                     if subty.java_ty == "long" and subty.java_hu_ty != "long":
 495                         from_hu_conv = ("Arrays.stream(" + arr_name + ").mapToLong(" + conv_name + " -> " + subty.from_hu_conv[0] + ").toArray()", "/* TODO 2 " + subty.java_hu_ty + "  */")
 496                     elif subty.java_ty == "long":
 497                         from_hu_conv = ("Arrays.stream(" + arr_name + ").map(" + conv_name + " -> " + subty.from_hu_conv[0] + ").toArray()", "/* TODO 2 " + subty.java_hu_ty + "  */")
 498                     else:
 499                         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 + "  */")
 500
 501                 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 502                     arg_conv = arg_conv, arg_conv_name = arg_conv_name, arg_conv_cleanup = arg_conv_cleanup,
 503                     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)
 504         elif ty_info.java_ty == "String":
 505             if ty_info.arr_access is None:
 506                 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 507                     arg_conv = None, arg_conv_name = None, arg_conv_cleanup = None,
 508                     ret_conv = ("jstring " + ty_info.var_name + "_conv = (*env)->NewStringUTF(env, ", ");"), ret_conv_name = ty_info.var_name + "_conv",
 509                     to_hu_conv = None, to_hu_conv_name = None, from_hu_conv = None)
 510             else:
 511                 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 512                     arg_conv = None, arg_conv_name = None, arg_conv_cleanup = None,
 513                     ret_conv = ("LDKStr " + ty_info.var_name + "_str = ",
 514                         ";\nchar* " + ty_info.var_name + "_buf = MALLOC(" + ty_info.var_name + "_str." + ty_info.arr_len + " + 1, \"str conv buf\");\n" +
 515                         "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" +
 516                         ty_info.var_name + "_buf[" + ty_info.var_name + "_str." + ty_info.arr_len + "] = 0;\n" +
 517                         "jstring " + ty_info.var_name + "_conv = (*env)->NewStringUTF(env, " + ty_info.var_name + "_str." + ty_info.arr_access + ");\n" +
 518                         "FREE(" + ty_info.var_name + "_buf);"),
 519                     ret_conv_name = ty_info.var_name + "_conv", to_hu_conv = None, to_hu_conv_name = None, from_hu_conv = None)
 520         elif ty_info.var_name == "" and not print_void:
 521             # We don't have a parameter name, and want one, just call it arg
 522             if ty_info.rust_obj is not None:
 523                 assert(not is_free or ty_info.rust_obj not in opaque_structs)
 524                 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 525                     arg_conv = ty_info.rust_obj + " arg_conv = *(" + ty_info.rust_obj + "*)arg;\nFREE((void*)arg);",
 526                     arg_conv_name = "arg_conv", arg_conv_cleanup = None,
 527                     ret_conv = None, ret_conv_name = None, to_hu_conv = "TODO 7", to_hu_conv_name = None, from_hu_conv = None)
 528             else:
 529                 assert(not is_free)
 530                 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 531                     arg_conv = None, arg_conv_name = "arg", arg_conv_cleanup = None,
 532                     ret_conv = None, ret_conv_name = None, to_hu_conv = "TODO 8", to_hu_conv_name = None, from_hu_conv = None)
 533         elif ty_info.rust_obj is None:
 534             return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 535                 arg_conv = None, arg_conv_name = ty_info.var_name, arg_conv_cleanup = None,
 536                 ret_conv = None, ret_conv_name = None, to_hu_conv = None, to_hu_conv_name = None, from_hu_conv = None)
 537         else:
 538             if ty_info.var_name == "":
 539                 ty_info.var_name = "ret"
 540
 541             if ty_info.rust_obj in opaque_structs:
 542                 opaque_arg_conv = ty_info.rust_obj + " " + ty_info.var_name + "_conv;\n"
 543                 opaque_arg_conv = opaque_arg_conv + ty_info.var_name + "_conv.inner = (void*)(" + ty_info.var_name + " & (~1));\n"
 544                 if ty_info.is_ptr and holds_ref:
 545                     opaque_arg_conv = opaque_arg_conv + ty_info.var_name + "_conv.is_owned = false;"
 546                 else:
 547                     opaque_arg_conv = opaque_arg_conv + ty_info.var_name + "_conv.is_owned = (" + ty_info.var_name + " & 1) || (" + ty_info.var_name + " == 0);"
 548                 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:
 549                     if (ty_info.rust_obj.replace("LDK", "") + "_clone") in clone_fns:
 550                         # 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.
 551                         opaque_arg_conv = opaque_arg_conv + "\nif (" + ty_info.var_name + "_conv.inner != NULL)\n"
 552                         opaque_arg_conv = opaque_arg_conv + "\t" + ty_info.var_name + "_conv = " + ty_info.rust_obj.replace("LDK", "") + "_clone(&" + ty_info.var_name + "_conv);"
 553                     elif ty_info.passed_as_ptr:
 554                         opaque_arg_conv = opaque_arg_conv + "\n// Warning: we may need a move here but can't clone!"
 555
 556                 opaque_ret_conv_suf = ";\n"
 557                 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
 558                     opaque_ret_conv_suf = opaque_ret_conv_suf + "if (" + ty_info.var_name + "->inner != NULL)\n"
 559                     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"
 560                 elif not holds_ref and ty_info.is_ptr:
 561                     opaque_ret_conv_suf = opaque_ret_conv_suf + "// Warning: we may need a move here but can't clone!\n"
 562
 563                 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"
 564                 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"
 565                 if holds_ref:
 566                     opaque_ret_conv_suf = opaque_ret_conv_suf + "long " + ty_info.var_name + "_ref = (long)" + ty_info.var_name + "_var.inner & ~1;"
 567                 else:
 568                     opaque_ret_conv_suf = opaque_ret_conv_suf + "long " + ty_info.var_name + "_ref = (long)" + ty_info.var_name + "_var.inner;\n"
 569                     opaque_ret_conv_suf = opaque_ret_conv_suf + "if (" + ty_info.var_name + "_var.is_owned) {\n"
 570                     opaque_ret_conv_suf = opaque_ret_conv_suf + "\t" + ty_info.var_name + "_ref |= 1;\n"
 571                     opaque_ret_conv_suf = opaque_ret_conv_suf + "}"
 572
 573                 if ty_info.is_ptr:
 574                     return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 575                         arg_conv = opaque_arg_conv, arg_conv_name = "&" + ty_info.var_name + "_conv", arg_conv_cleanup = None,
 576                         ret_conv = (ty_info.rust_obj + " " + ty_info.var_name + "_var = *", opaque_ret_conv_suf),
 577                         ret_conv_name = ty_info.var_name + "_ref",
 578                         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 + ");",
 579                         to_hu_conv_name = ty_info.var_name + "_hu_conv",
 580                         from_hu_conv = (ty_info.var_name + " == null ? 0 : " + ty_info.var_name + ".ptr & ~1", "this.ptrs_to.add(" + ty_info.var_name + ")"))
 581                 else:
 582                     return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 583                         arg_conv = opaque_arg_conv, arg_conv_name = ty_info.var_name + "_conv", arg_conv_cleanup = None,
 584                         ret_conv = (ty_info.rust_obj + " " + ty_info.var_name + "_var = ", opaque_ret_conv_suf),
 585                         ret_conv_name = ty_info.var_name + "_ref",
 586                         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 + ");",
 587                         to_hu_conv_name = ty_info.var_name + "_hu_conv",
 588                         from_hu_conv = (ty_info.var_name + " == null ? 0 : " + ty_info.var_name + ".ptr & ~1", "this.ptrs_to.add(" + ty_info.var_name + ")"))
 589
 590             if not ty_info.is_ptr:
 591                 if ty_info.rust_obj in unitary_enums:
 592                     (ret_pfx, ret_sfx) = consts.c_unitary_enum_to_native_call(ty_info)
 593                     (arg_pfx, arg_sfx) = consts.native_unitary_enum_to_c_call(ty_info)
 594                     return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 595                         arg_conv = ty_info.rust_obj + " " + ty_info.var_name + "_conv = " + arg_pfx + ty_info.var_name + arg_sfx + ";",
 596                         arg_conv_name = ty_info.var_name + "_conv",
 597                         arg_conv_cleanup = None,
 598                         ret_conv = (ty_info.c_ty + " " + ty_info.var_name + "_conv = " + ret_pfx, ret_sfx + ";"),
 599                         ret_conv_name = ty_info.var_name + "_conv", to_hu_conv = None, to_hu_conv_name = None, from_hu_conv = None)
 600                 base_conv = ty_info.rust_obj + " " + ty_info.var_name + "_conv = *(" + ty_info.rust_obj + "*)" + ty_info.var_name + ";"
 601                 if ty_info.rust_obj in trait_structs:
 602                     if not is_free:
 603                         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
 604                         if needs_full_clone and (ty_info.rust_obj.replace("LDK", "") + "_clone") in clone_fns:
 605                             base_conv = base_conv + "\n" + ty_info.var_name + "_conv = " + ty_info.rust_obj.replace("LDK", "") + "_clone(" + ty_info.var_name + ");"
 606                         else:
 607                             base_conv = base_conv + "\nif (" + ty_info.var_name + "_conv.free == " + ty_info.rust_obj + "_JCalls_free) {\n"
 608                             base_conv = base_conv + "\t// If this_arg is a JCalls struct, then we need to increment the refcnt in it.\n"
 609                             base_conv = base_conv + "\t" + ty_info.rust_obj + "_JCalls_clone(" + ty_info.var_name + "_conv.this_arg);\n}"
 610                             if needs_full_clone:
 611                                 base_conv = base_conv + "// Warning: we may need a move here but can't do a full clone!\n"
 612
 613                     else:
 614                         base_conv = base_conv + "\n" + "FREE((void*)" + ty_info.var_name + ");"
 615                     return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 616                         arg_conv = base_conv, arg_conv_name = ty_info.var_name + "_conv", arg_conv_cleanup = None,
 617                         ret_conv = (ty_info.rust_obj + "* ret = MALLOC(sizeof(" + ty_info.rust_obj + "), \"" + ty_info.rust_obj + "\");\n*ret = ", ";"),
 618                         ret_conv_name = "(long)ret",
 619                         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);",
 620                         to_hu_conv_name = "ret_hu_conv",
 621                         from_hu_conv = (ty_info.var_name + " == null ? 0 : " + ty_info.var_name + ".ptr", "this.ptrs_to.add(" + ty_info.var_name + ")"))
 622                 if ty_info.rust_obj != "LDKu8slice":
 623                     # Don't bother free'ing slices passed in - Rust doesn't auto-free the
 624                     # underlying unlike Vecs, and it gives Java more freedom.
 625                     base_conv = base_conv + "\nFREE((void*)" + ty_info.var_name + ");";
 626                 if ty_info.rust_obj in complex_enums:
 627                     ret_conv = ("long " + ty_info.var_name + "_ref = (long)&", ";")
 628                     if not holds_ref:
 629                         ret_conv = (ty_info.rust_obj + " *" + ty_info.var_name + "_copy = MALLOC(sizeof(" + ty_info.rust_obj + "), \"" + ty_info.rust_obj + "\");\n", "")
 630                         if ty_info.requires_clone == True: # Set in object array mapping
 631                             if (ty_info.rust_obj.replace("LDK", "") + "_clone") in clone_fns:
 632                                 ret_conv = (ret_conv[0] + "*" + ty_info.var_name + "_copy = " + ty_info.rust_obj.replace("LDK", "") + "_clone(&", ");\n")
 633                             else:
 634                                 ret_conv = (ret_conv[0] + "*" + ty_info.var_name + "_copy = ", "; // XXX: We likely need to clone here, but no _clone fn is available!\n")
 635                         else:
 636                             ret_conv = (ret_conv[0] + "*" + ty_info.var_name + "_copy = ", ";\n")
 637                         ret_conv = (ret_conv[0], ret_conv[1] + "long " + ty_info.var_name + "_ref = (long)" + ty_info.var_name + "_copy;")
 638                     return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 639                         arg_conv = base_conv, arg_conv_name = ty_info.var_name + "_conv", arg_conv_cleanup = None,
 640                         ret_conv = ret_conv, ret_conv_name = ty_info.var_name + "_ref",
 641                         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);",
 642                         to_hu_conv_name = ty_info.var_name + "_hu_conv", from_hu_conv = (ty_info.var_name + ".ptr", ""))
 643                 if ty_info.rust_obj in result_types:
 644                     if holds_ref:
 645                         # If we're trying to return a ref, we have to clone.
 646                         # We just blindly assume its implemented and let the compiler fail if its not.
 647                         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 = ", ";")
 648                         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);")
 649                     else:
 650                         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 = ", ";")
 651                     return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 652                         arg_conv = base_conv, arg_conv_name = ty_info.var_name + "_conv", arg_conv_cleanup = None,
 653                         ret_conv = ret_conv, ret_conv_name = "(long)" + ty_info.var_name + "_conv",
 654                         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 + ");",
 655                         to_hu_conv_name = ty_info.var_name + "_hu_conv", from_hu_conv = (ty_info.var_name + " != null ? " + ty_info.var_name + ".ptr : 0", ""))
 656                 if ty_info.rust_obj in tuple_types:
 657                     from_hu_conv = "bindings." + tuple_types[ty_info.rust_obj][1].replace("LDK", "") + "_new("
 658                     to_hu_conv_pfx = ""
 659                     to_hu_conv_sfx = ty_info.java_hu_ty + " " + ty_info.var_name + "_conv = new " + ty_info.java_hu_ty + "("
 660                     clone_ret_str = ""
 661                     for idx, conv in enumerate(tuple_types[ty_info.rust_obj][0]):
 662                         if idx != 0:
 663                             to_hu_conv_sfx = to_hu_conv_sfx + ", "
 664                             from_hu_conv = from_hu_conv + ", "
 665                         conv.var_name = ty_info.var_name + "_" + chr(idx + ord("a"))
 666                         conv_map = map_type_with_info(conv, False, None, is_free, holds_ref)
 667                         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"
 668                         if conv_map.to_hu_conv is not None:
 669                             to_hu_conv_pfx = to_hu_conv_pfx + conv_map.to_hu_conv + ";\n"
 670                             to_hu_conv_sfx = to_hu_conv_sfx + conv_map.to_hu_conv_name
 671                         else:
 672                             to_hu_conv_sfx = to_hu_conv_sfx + ty_info.var_name + "_" + chr(idx + ord("a"))
 673                         if conv_map.from_hu_conv is not None:
 674                             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")))
 675                             if conv_map.from_hu_conv[1] != "":
 676                                 from_hu_conv = from_hu_conv + "/*XXX: " + conv_map.from_hu_conv[1] + "*/"
 677                         else:
 678                             from_hu_conv = from_hu_conv + ty_info.var_name + "." + chr(idx + ord("a"))
 679
 680                         if conv.is_native_primitive:
 681                             pass
 682                         elif (conv_map.rust_obj.replace("LDK", "") + "_clone") in clone_fns:
 683                             accessor = ty_info.var_name + "_ref->" + chr(idx + ord("a"))
 684                             clone_ret_str = clone_ret_str + "\n" + accessor + " = " + conv_map.rust_obj.replace("LDK", "") + "_clone(&" + accessor + ");"
 685                         else:
 686                             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
 687                     if not ty_info.is_ptr and not holds_ref:
 688                         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 = ", ";")
 689                         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:
 690                             ret_conv = (ret_conv[0], ret_conv[1] + clone_ret_str)
 691                         return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 692                             arg_conv = base_conv, arg_conv_name = ty_info.var_name + "_conv", arg_conv_cleanup = None,
 693                             ret_conv = ret_conv,
 694                             ret_conv_name = "(long)" + ty_info.var_name + "_ref",
 695                             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 + ")", ""))
 696                     return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 697                         arg_conv = base_conv, arg_conv_name = ty_info.var_name + "_conv", arg_conv_cleanup = None,
 698                         ret_conv = ("long " + ty_info.var_name + "_ref = (long)&", ";"), ret_conv_name = ty_info.var_name + "_ref",
 699                         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 + ")", ""))
 700
 701                 # The manually-defined types - TxOut and Transaction
 702                 assert ty_info.rust_obj == "LDKTxOut"
 703                 if not ty_info.is_ptr and not holds_ref:
 704                     ret_conv = ("LDKTxOut* " + ty_info.var_name + "_ref = MALLOC(sizeof(LDKTxOut), \"LDKTxOut\");\n*" + ty_info.var_name + "_ref = ", ";")
 705                 else:
 706                     ret_conv = ("long " + ty_info.var_name + "_ref = (long)&", ";")
 707                 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 708                     arg_conv = base_conv, arg_conv_name = ty_info.var_name + "_conv", arg_conv_cleanup = None,
 709                     ret_conv = ret_conv, ret_conv_name = "(long)" + ty_info.var_name + "_ref",
 710                     to_hu_conv = ty_info.java_hu_ty + " " + ty_info.var_name + "_conv = new " +ty_info.java_hu_ty + "(null, " + ty_info.var_name + ");",
 711                     to_hu_conv_name = ty_info.var_name + "_conv", from_hu_conv = (ty_info.var_name + ".ptr", ""))
 712             elif ty_info.is_ptr:
 713                 assert(not is_free)
 714                 if ty_info.rust_obj in complex_enums:
 715                     return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 716                         arg_conv = ty_info.rust_obj + "* " + ty_info.var_name + "_conv = (" + ty_info.rust_obj + "*)" + ty_info.var_name + ";",
 717                         arg_conv_name = ty_info.var_name + "_conv", arg_conv_cleanup = None,
 718                         ret_conv = ("long ret_" + ty_info.var_name + " = (long)", ";"), ret_conv_name = "ret_" + ty_info.var_name,
 719                         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 + ");",
 720                         to_hu_conv_name = ty_info.var_name + "_hu_conv",
 721                         from_hu_conv = (ty_info.var_name + " == null ? 0 : " + ty_info.var_name + ".ptr & ~1", "this.ptrs_to.add(" + ty_info.var_name + ")"))
 722                 elif ty_info.rust_obj in trait_structs:
 723                     if ty_info.rust_obj.replace("LDK", "") + "_clone" in clone_fns:
 724                         return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 725                             arg_conv = ty_info.rust_obj + "* " + ty_info.var_name + "_conv = (" + ty_info.rust_obj + "*)" + ty_info.var_name + ";",
 726                             arg_conv_name = ty_info.var_name + "_conv", arg_conv_cleanup = None,
 727                             ret_conv = (ty_info.rust_obj + " *" + ty_info.var_name + "_clone = MALLOC(sizeof(" + ty_info.rust_obj + "), \"" + ty_info.rust_obj + "\");\n" +
 728                                 "*" + ty_info.var_name + "_clone = " + ty_info.rust_obj.replace("LDK", "") + "_clone(", ");"),
 729                             ret_conv_name = "(long)" + ty_info.var_name + "_clone",
 730                             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);",
 731                             to_hu_conv_name = "ret_hu_conv",
 732                             from_hu_conv = (ty_info.var_name + " == null ? 0 : " + ty_info.var_name + ".ptr", "this.ptrs_to.add(" + ty_info.var_name + ")"))
 733                     else:
 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 = 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);",
 739                             to_hu_conv_name = "ret_hu_conv",
 740                             from_hu_conv = (ty_info.var_name + " == null ? 0 : " + ty_info.var_name + ".ptr", "this.ptrs_to.add(" + ty_info.var_name + ")"))
 741                 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 742                     arg_conv = ty_info.rust_obj + "* " + ty_info.var_name + "_conv = (" + ty_info.rust_obj + "*)" + ty_info.var_name + ";",
 743                     arg_conv_name = ty_info.var_name + "_conv", arg_conv_cleanup = None,
 744                     ret_conv = ("long ret_" + ty_info.var_name + " = (long)", ";"), ret_conv_name = "ret_" + ty_info.var_name,
 745                     to_hu_conv = "TODO 3", to_hu_conv_name = None, from_hu_conv = None) # its a pointer, no conv needed
 746             assert False # We should have handled every case by now.
 747
 748     def map_fn(line, re_match, ret_arr_len, c_call_string):
 749         out_java.write("\t// " + line)
 750         out_java.write("\tpublic static native ")
 751         write_c(consts.c_fn_ty_pfx)
 752
 753         is_free = re_match.group(2).endswith("_free")
 754         struct_meth = re_match.group(2).split("_")[0]
 755
 756         ret_info = map_type(re_match.group(1), True, ret_arr_len, False, False)
 757         write_c(ret_info.c_ty)
 758         out_java.write(ret_info.java_ty)
 759
 760         if ret_info.ret_conv is not None:
 761             ret_conv_pfx, ret_conv_sfx = ret_info.ret_conv
 762
 763         out_java.write(" " + re_match.group(2) + "(")
 764         write_c(" " + consts.c_fn_name_pfx + re_match.group(2).replace('_', '_1') + "(" + consts.c_fn_args_pfx)
 765
 766         arg_names = []
 767         default_constructor_args = {}
 768         takes_self = False
 769         args_known = True
 770         for idx, arg in enumerate(re_match.group(3).split(',')):
 771             if idx != 0:
 772                 out_java.write(", ")
 773             if arg != "void":
 774                 write_c(", ")
 775             arg_conv_info = map_type(arg, False, None, is_free, True)
 776             if arg_conv_info.c_ty != "void":
 777                 write_c(arg_conv_info.c_ty + " " + arg_conv_info.arg_name)
 778                 out_java.write(arg_conv_info.java_ty + " " + arg_conv_info.arg_name)
 779             if idx == 0 and arg_conv_info.java_hu_ty == struct_meth:
 780                 takes_self = True
 781             if arg_conv_info.arg_conv is not None and "Warning" in arg_conv_info.arg_conv:
 782                 if arg_conv_info.rust_obj in constructor_fns:
 783                     assert not is_free
 784                     for explode_arg in constructor_fns[arg_conv_info.rust_obj].split(','):
 785                         explode_arg_conv = map_type(explode_arg, False, None, False, True)
 786                         if explode_arg_conv.c_ty == "void":
 787                             # We actually want to handle this case, but for now its only used in NetGraphMsgHandler::new()
 788                             # which ends up resulting in a redundant constructor - both without arguments for the NetworkGraph.
 789                             args_known = False
 790                             pass
 791                         if not arg_conv_info.arg_name in default_constructor_args:
 792                             default_constructor_args[arg_conv_info.arg_name] = []
 793                         default_constructor_args[arg_conv_info.arg_name].append(explode_arg_conv)
 794             arg_names.append(arg_conv_info)
 795
 796         out_java_struct = None
 797         if ("LDK" + struct_meth in opaque_structs or "LDK" + struct_meth in trait_structs) and not is_free:
 798             out_java_struct = open(f"{sys.argv[3]}/structs/{struct_meth}{consts.file_ext}", "a")
 799             if not args_known:
 800                 out_java_struct.write("\t// Skipped " + re_match.group(2) + "\n")
 801                 out_java_struct.close()
 802                 out_java_struct = None
 803             else:
 804                 meth_n = re_match.group(2)[len(struct_meth) + 1:]
 805                 if not takes_self:
 806                     out_java_struct.write("\tpublic static " + ret_info.java_hu_ty + " constructor_" + meth_n + "(")
 807                 else:
 808                     out_java_struct.write("\tpublic " + ret_info.java_hu_ty + " " + meth_n + "(")
 809                 for idx, arg in enumerate(arg_names):
 810                     if idx != 0:
 811                         if not takes_self or idx > 1:
 812                             out_java_struct.write(", ")
 813                     elif takes_self:
 814                         continue
 815                     if arg.java_ty != "void":
 816                         if arg.arg_name in default_constructor_args:
 817                             for explode_idx, explode_arg in enumerate(default_constructor_args[arg.arg_name]):
 818                                 if explode_idx != 0:
 819                                     out_java_struct.write(", ")
 820                                 out_java_struct.write(explode_arg.java_hu_ty + " " + arg.arg_name + "_" + explode_arg.arg_name)
 821                         else:
 822                             out_java_struct.write(arg.java_hu_ty + " " + arg.arg_name)
 823
 824
 825         out_java.write(");\n")
 826         write_c(") {\n")
 827         if out_java_struct is not None:
 828             out_java_struct.write(") {\n")
 829
 830         for info in arg_names:
 831             if info.arg_conv is not None:
 832                 write_c("\t" + info.arg_conv.replace('\n', "\n\t") + "\n")
 833
 834         if ret_info.ret_conv is not None:
 835             write_c("\t" + ret_conv_pfx.replace('\n', '\n\t'))
 836         elif ret_info.c_ty != "void":
 837             write_c("\t" + ret_info.c_ty + " ret_val = ")
 838         else:
 839             write_c("\t")
 840
 841         if c_call_string is None:
 842             write_c(re_match.group(2) + "(")
 843         else:
 844             write_c(c_call_string)
 845         for idx, info in enumerate(arg_names):
 846             if info.arg_conv_name is not None:
 847                 if idx != 0:
 848                     write_c(", ")
 849                 elif c_call_string is not None:
 850                     continue
 851                 write_c(info.arg_conv_name)
 852         write_c(")")
 853         if ret_info.ret_conv is not None:
 854             write_c(ret_conv_sfx.replace('\n', '\n\t'))
 855         else:
 856             write_c(";")
 857         for info in arg_names:
 858             if info.arg_conv_cleanup is not None:
 859                 write_c("\n\t" + info.arg_conv_cleanup.replace("\n", "\n\t"))
 860         if ret_info.ret_conv is not None:
 861             write_c("\n\treturn " + ret_info.ret_conv_name + ";")
 862         elif ret_info.c_ty != "void":
 863             write_c("\n\treturn ret_val;")
 864         write_c("\n}\n\n")
 865         if out_java_struct is not None:
 866             out_java_struct.write("\t\t")
 867             if ret_info.java_ty != "void":
 868                 out_java_struct.write(ret_info.java_ty + " ret = ")
 869             out_java_struct.write("bindings." + re_match.group(2) + "(")
 870             for idx, info in enumerate(arg_names):
 871                 if idx != 0:
 872                     out_java_struct.write(", ")
 873                 if idx == 0 and takes_self:
 874                     out_java_struct.write("this.ptr")
 875                 elif info.arg_name in default_constructor_args:
 876                     out_java_struct.write("bindings." + info.java_hu_ty + "_new(")
 877                     for explode_idx, explode_arg in enumerate(default_constructor_args[info.arg_name]):
 878                         if explode_idx != 0:
 879                             out_java_struct.write(", ")
 880                         expl_arg_name = info.arg_name + "_" + explode_arg.arg_name
 881                         if explode_arg.from_hu_conv is not None:
 882                             out_java_struct.write(explode_arg.from_hu_conv[0].replace(explode_arg.arg_name, expl_arg_name))
 883                         else:
 884                             out_java_struct.write(expl_arg_name)
 885                     out_java_struct.write(")")
 886                 elif info.from_hu_conv is not None:
 887                     out_java_struct.write(info.from_hu_conv[0])
 888                 else:
 889                     out_java_struct.write(info.arg_name)
 890             out_java_struct.write(");\n")
 891             if ret_info.to_hu_conv is not None:
 892                 if not takes_self:
 893                     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")
 894                 else:
 895                     out_java_struct.write("\t\t" + ret_info.to_hu_conv.replace("\n", "\n\t\t") + "\n")
 896
 897             for idx, info in enumerate(arg_names):
 898                 if idx == 0 and takes_self:
 899                     pass
 900                 elif info.arg_name in default_constructor_args:
 901                     for explode_arg in default_constructor_args[info.arg_name]:
 902                         expl_arg_name = info.arg_name + "_" + explode_arg.arg_name
 903                         if explode_arg.from_hu_conv is not None and ret_info.to_hu_conv_name:
 904                             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")
 905                 elif info.from_hu_conv is not None and info.from_hu_conv[1] != "":
 906                     if not takes_self and ret_info.to_hu_conv_name is not None:
 907                         out_java_struct.write("\t\t" + info.from_hu_conv[1].replace("this", ret_info.to_hu_conv_name) + ";\n")
 908                     else:
 909                         out_java_struct.write("\t\t" + info.from_hu_conv[1] + ";\n")
 910
 911             if ret_info.to_hu_conv_name is not None:
 912                 out_java_struct.write("\t\treturn " + ret_info.to_hu_conv_name + ";\n")
 913             elif ret_info.java_ty != "void" and ret_info.rust_obj != "LDK" + struct_meth:
 914                 out_java_struct.write("\t\treturn ret;\n")
 915             out_java_struct.write("\t}\n\n")
 916             out_java_struct.close()
 917
 918     def map_unitary_enum(struct_name, field_lines):
 919         with open(f"{sys.argv[3]}/enums/{struct_name}{consts.file_ext}", "w") as out_java_enum:
 920             unitary_enums.add(struct_name)
 921             for idx, struct_line in enumerate(field_lines):
 922                 if idx == 0:
 923                     assert(struct_line == "typedef enum %s {" % struct_name)
 924                 elif idx == len(field_lines) - 3:
 925                     assert(struct_line.endswith("_Sentinel,"))
 926                 elif idx == len(field_lines) - 2:
 927                     assert(struct_line == "} %s;" % struct_name)
 928                 elif idx == len(field_lines) - 1:
 929                     assert(struct_line == "")
 930             (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]])
 931             write_c(c_out)
 932             out_java_enum.write(native_file_out)
 933             out_java.write(native_out)
 934
 935     def map_complex_enum(struct_name, union_enum_items):
 936         java_hu_type = struct_name.replace("LDK", "")
 937         complex_enums.add(struct_name)
 938
 939         enum_variants = []
 940         tag_field_lines = union_enum_items["field_lines"]
 941         for idx, struct_line in enumerate(tag_field_lines):
 942             if idx == 0:
 943                 assert(struct_line == "typedef enum %s_Tag {" % struct_name)
 944             elif idx == len(tag_field_lines) - 3:
 945                 assert(struct_line.endswith("_Sentinel,"))
 946             elif idx == len(tag_field_lines) - 2:
 947                 assert(struct_line == "} %s_Tag;" % struct_name)
 948             elif idx == len(tag_field_lines) - 1:
 949                 assert(struct_line == "")
 950             else:
 951                 variant_name = struct_line.strip(' ,')[len(struct_name) + 1:]
 952                 fields = []
 953                 if "LDK" + variant_name in union_enum_items:
 954                     enum_var_lines = union_enum_items["LDK" + variant_name]
 955                     for idx, field in enumerate(enum_var_lines):
 956                         if idx != 0 and idx < len(enum_var_lines) - 2:
 957                             fields.append(map_type(field.strip(' ;'), False, None, False, True))
 958                         else:
 959                             # TODO: Assert line format
 960                             pass
 961                 else:
 962                     # TODO: Assert line format
 963                     pass
 964                 enum_variants.append(ComplexEnumVariantInfo(variant_name, fields))
 965
 966         with open(f"{sys.argv[3]}/structs/{java_hu_type}{consts.file_ext}", "w") as out_java_enum:
 967             (out_java_addendum, out_java_enum_addendum, out_c_addendum) = consts.map_complex_enum(struct_name, enum_variants, camel_to_snake)
 968
 969             out_java_enum.write(out_java_enum_addendum)
 970             out_java.write(out_java_addendum)
 971             write_c(out_c_addendum)
 972
 973     def map_trait(struct_name, field_var_lines, trait_fn_lines):
 974         with open(f"{sys.argv[3]}/structs/{struct_name.replace('LDK', '')}{consts.file_ext}", "w") as out_java_trait:
 975             field_var_convs = []
 976             for var_line in field_var_lines:
 977                 if var_line.group(1) in trait_structs:
 978                     field_var_convs.append((var_line.group(1), var_line.group(2)))
 979                 else:
 980                     field_var_convs.append(map_type(var_line.group(1) + " " + var_line.group(2), False, None, False, False))
 981
 982             field_fns = []
 983             for fn_line in trait_fn_lines:
 984                 ret_ty_info = map_type(fn_line.group(2), True, None, False, False)
 985                 is_const = fn_line.group(4) is not None
 986
 987                 arg_tys = []
 988                 for idx, arg in enumerate(fn_line.group(5).split(',')):
 989                     if arg == "":
 990                         continue
 991                     arg_conv_info = map_type(arg, True, None, False, False)
 992                     arg_tys.append(arg_conv_info)
 993                 field_fns.append(TraitMethInfo(fn_line.group(3), is_const, ret_ty_info, arg_tys))
 994
 995             (out_java_addendum, out_java_trait_addendum, out_c_addendum) = consts.native_c_map_trait(struct_name, field_var_convs, field_fns)
 996             write_c(out_c_addendum)
 997             out_java_trait.write(out_java_trait_addendum)
 998             out_java.write(out_java_addendum)
 999
1000         for fn_line in trait_fn_lines:
1001             # For now, just disable enabling the _call_log - we don't know how to inverse-map String
1002             is_log = fn_line.group(3) == "log" and struct_name == "LDKLogger"
1003             if fn_line.group(3) != "free" and fn_line.group(3) != "clone" and fn_line.group(3) != "eq" and not is_log:
1004                 dummy_line = fn_line.group(2) + struct_name.replace("LDK", "") + "_" + fn_line.group(3) + " " + struct_name + "* this_arg" + fn_line.group(5) + "\n"
1005                 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")
1006         for idx, var_line in enumerate(field_var_lines):
1007             if var_line.group(1) not in trait_structs:
1008                 write_c(var_line.group(1) + " " + struct_name + "_set_get_" + var_line.group(2) + "(" + struct_name + "* this_arg) {\n")
1009                 write_c("\tif (this_arg->set_" + var_line.group(2) + " != NULL)\n")
1010                 write_c("\t\tthis_arg->set_" + var_line.group(2) + "(this_arg);\n")
1011                 write_c("\treturn this_arg->" + var_line.group(2) + ";\n")
1012                 write_c("}\n")
1013                 dummy_line = var_line.group(1) + " " + struct_name.replace("LDK", "") + "_get_" + var_line.group(2) + " " + struct_name + "* this_arg" + fn_line.group(5) + "\n"
1014                 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")
1015
1016     def map_result(struct_name, res_ty, err_ty):
1017         result_types.add(struct_name)
1018         human_ty = struct_name.replace("LDKCResult", "Result")
1019         with open(f"{sys.argv[3]}/structs/{human_ty}{consts.file_ext}", "w") as out_java_struct:
1020             out_java_struct.write(consts.hu_struct_file_prefix)
1021             out_java_struct.write("public class " + human_ty + " extends CommonBase {\n")
1022             out_java_struct.write("\tprivate " + human_ty + "(Object _dummy, long ptr) { super(ptr); }\n")
1023             out_java_struct.write("\tprotected void finalize() throws Throwable {\n")
1024             out_java_struct.write("\t\tif (ptr != 0) { bindings." + struct_name.replace("LDK","") + "_free(ptr); } super.finalize();\n")
1025             out_java_struct.write("\t}\n\n")
1026             out_java_struct.write("\tstatic " + human_ty + " constr_from_ptr(long ptr) {\n")
1027             out_java_struct.write("\t\tif (bindings." + struct_name + "_result_ok(ptr)) {\n")
1028             out_java_struct.write("\t\t\treturn new " + human_ty + "_OK(null, ptr);\n")
1029             out_java_struct.write("\t\t} else {\n")
1030             out_java_struct.write("\t\t\treturn new " + human_ty + "_Err(null, ptr);\n")
1031             out_java_struct.write("\t\t}\n")
1032             out_java_struct.write("\t}\n")
1033
1034             res_map = map_type(res_ty + " res", True, None, False, True)
1035             err_map = map_type(err_ty + " err", True, None, False, True)
1036             can_clone = True
1037             if not res_map.is_native_primitive and (res_map.rust_obj.replace("LDK", "") + "_clone" not in clone_fns):
1038                 can_clone = False
1039             if not err_map.is_native_primitive and (err_map.rust_obj.replace("LDK", "") + "_clone" not in clone_fns):
1040                 can_clone = False
1041
1042             out_java.write("\tpublic static native boolean " + struct_name + "_result_ok(long arg);\n")
1043             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")
1044             write_c("\treturn ((" + struct_name + "*)arg)->result_ok;\n")
1045             write_c("}\n")
1046
1047             out_java.write("\tpublic static native " + res_map.java_ty + " " + struct_name + "_get_ok(long arg);\n")
1048             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")
1049             write_c("\t" + struct_name + " *val = (" + struct_name + "*)arg;\n")
1050             write_c("\tCHECK(val->result_ok);\n\t")
1051             out_java_struct.write("\tpublic static final class " + human_ty + "_OK extends " + human_ty + " {\n")
1052             if res_map.ret_conv is not None:
1053                 write_c(res_map.ret_conv[0].replace("\n", "\n\t") + "(*val->contents.result)")
1054                 write_c(res_map.ret_conv[1].replace("\n", "\n\t") + "\n\treturn " + res_map.ret_conv_name)
1055             else:
1056                 write_c("return *val->contents.result")
1057             write_c(";\n}\n")
1058
1059             if res_map.java_hu_ty != "void":
1060                 out_java_struct.write("\t\tpublic final " + res_map.java_hu_ty + " res;\n")
1061             out_java_struct.write("\t\tprivate " + human_ty + "_OK(Object _dummy, long ptr) {\n")
1062             out_java_struct.write("\t\t\tsuper(_dummy, ptr);\n")
1063             if res_map.java_hu_ty == "void":
1064                 pass
1065             elif res_map.to_hu_conv is not None:
1066                 out_java_struct.write("\t\t\t" + res_map.java_ty + " res = bindings." + struct_name + "_get_ok(ptr);\n")
1067                 out_java_struct.write("\t\t\t" + res_map.to_hu_conv.replace("\n", "\n\t\t\t"))
1068                 out_java_struct.write("\n\t\t\tthis.res = " + res_map.to_hu_conv_name + ";\n")
1069             else:
1070                 out_java_struct.write("\t\t\tthis.res = bindings." + struct_name + "_get_ok(ptr);\n")
1071             out_java_struct.write("\t\t}\n")
1072             if struct_name.startswith("LDKCResult_None"):
1073                 out_java_struct.write("\t\tpublic " + human_ty + "_OK() {\n\t\t\tthis(null, bindings.C" + human_ty + "_ok());\n")
1074             else:
1075                 out_java_struct.write("\t\tpublic " + human_ty + "_OK(" + res_map.java_hu_ty + " res) {\n")
1076                 if res_map.from_hu_conv is not None:
1077                     out_java_struct.write("\t\t\tthis(null, bindings.C" + human_ty + "_ok(" + res_map.from_hu_conv[0] + "));\n")
1078                     if res_map.from_hu_conv[1] != "":
1079                         out_java_struct.write("\t\t\t" + res_map.from_hu_conv[1] + ";\n")
1080                 else:
1081                     out_java_struct.write("\t\t\tthis(null, bindings.C" + human_ty + "_ok(res));\n")
1082             out_java_struct.write("\t\t}\n\t}\n\n")
1083
1084             out_java.write("\tpublic static native " + err_map.java_ty + " " + struct_name + "_get_err(long arg);\n")
1085             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")
1086             write_c("\t" + struct_name + " *val = (" + struct_name + "*)arg;\n")
1087             write_c("\tCHECK(!val->result_ok);\n\t")
1088             out_java_struct.write("\tpublic static final class " + human_ty + "_Err extends " + human_ty + " {\n")
1089             if err_map.ret_conv is not None:
1090                 write_c(err_map.ret_conv[0].replace("\n", "\n\t") + "(*val->contents.err)")
1091                 write_c(err_map.ret_conv[1].replace("\n", "\n\t") + "\n\treturn " + err_map.ret_conv_name)
1092             else:
1093                 write_c("return *val->contents.err")
1094             write_c(";\n}\n")
1095
1096             if err_map.java_hu_ty != "void":
1097                 out_java_struct.write("\t\tpublic final " + err_map.java_hu_ty + " err;\n")
1098             out_java_struct.write("\t\tprivate " + human_ty + "_Err(Object _dummy, long ptr) {\n")
1099             out_java_struct.write("\t\t\tsuper(_dummy, ptr);\n")
1100             if err_map.java_hu_ty == "void":
1101                 pass
1102             elif err_map.to_hu_conv is not None:
1103                 out_java_struct.write("\t\t\t" + err_map.java_ty + " err = bindings." + struct_name + "_get_err(ptr);\n")
1104                 out_java_struct.write("\t\t\t" + err_map.to_hu_conv.replace("\n", "\n\t\t\t"))
1105                 out_java_struct.write("\n\t\t\tthis.err = " + err_map.to_hu_conv_name + ";\n")
1106             else:
1107                 out_java_struct.write("\t\t\tthis.err = bindings." + struct_name + "_get_err(ptr);\n")
1108             out_java_struct.write("\t\t}\n")
1109
1110             if struct_name.endswith("NoneZ"):
1111                 out_java_struct.write("\t\tpublic " + human_ty + "_Err() {\n\t\t\tthis(null, bindings.C" + human_ty + "_err());\n")
1112             else:
1113                 out_java_struct.write("\t\tpublic " + human_ty + "_Err(" + err_map.java_hu_ty + " err) {\n")
1114                 if err_map.from_hu_conv is not None:
1115                     out_java_struct.write("\t\t\tthis(null, bindings.C" + human_ty + "_err(" + err_map.from_hu_conv[0] + "));\n")
1116                     if err_map.from_hu_conv[1] != "":
1117                         out_java_struct.write("\t\t\t" + err_map.from_hu_conv[1] + ";\n")
1118                 else:
1119                     out_java_struct.write("\t\t\tthis(null, bindings.C" + human_ty + "_err(err));\n")
1120             out_java_struct.write("\t\t}\n\t}\n}\n")
1121
1122             if can_clone:
1123                 clone_fns.add(struct_name.replace("LDK", "") + "_clone")
1124                 write_c("static inline " + struct_name + " " + struct_name.replace("LDK", "") + "_clone(const " + struct_name + " *orig) {\n")
1125                 write_c("\t" + struct_name + " res = { .result_ok = orig->result_ok };\n")
1126                 write_c("\tif (orig->result_ok) {\n")
1127                 if res_map.c_ty == "void":
1128                     write_c("\t\tres.contents.result = NULL;\n")
1129                 else:
1130                     if res_map.is_native_primitive:
1131                         write_c("\t\t" + res_map.c_ty + "* contents = MALLOC(sizeof(" + res_map.c_ty + "), \"" + res_map.c_ty + " result OK clone\");\n")
1132                         write_c("\t\t*contents = *orig->contents.result;\n")
1133                     else:
1134                         write_c("\t\t" + res_map.rust_obj + "* contents = MALLOC(sizeof(" + res_map.rust_obj + "), \"" + res_map.rust_obj + " result OK clone\");\n")
1135                         write_c("\t\t*contents = " + res_map.rust_obj.replace("LDK", "") + "_clone(orig->contents.result);\n")
1136                     write_c("\t\tres.contents.result = contents;\n")
1137                 write_c("\t} else {\n")
1138                 if err_map.c_ty == "void":
1139                     write_c("\t\tres.contents.err = NULL;\n")
1140                 else:
1141                     if err_map.is_native_primitive:
1142                         write_c("\t\t" + err_map.c_ty + "* contents = MALLOC(sizeof(" + err_map.c_ty + "), \"" + err_map.c_ty + " result Err clone\");\n")
1143                         write_c("\t\t*contents = *orig->contents.err;\n")
1144                     else:
1145                         write_c("\t\t" + err_map.rust_obj + "* contents = MALLOC(sizeof(" + err_map.rust_obj + "), \"" + err_map.rust_obj + " result Err clone\");\n")
1146                         write_c("\t\t*contents = " + err_map.rust_obj.replace("LDK", "") + "_clone(orig->contents.err);\n")
1147                     write_c("\t\tres.contents.err = contents;\n")
1148                 write_c("\t}\n\treturn res;\n}\n")
1149
1150     def map_tuple(struct_name, field_lines):
1151         out_java.write("\tpublic static native long " + struct_name + "_new(")
1152         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)
1153         ty_list = []
1154         for idx, line in enumerate(field_lines):
1155             if idx != 0 and idx < len(field_lines) - 2:
1156                 ty_info = java_c_types(line.strip(';'), None)
1157                 if idx != 1:
1158                     out_java.write(", ")
1159                 e = chr(ord('a') + idx - 1)
1160                 out_java.write(ty_info.java_ty + " " + e)
1161                 write_c(", " + ty_info.c_ty + " " + e)
1162                 ty_list.append(ty_info)
1163         tuple_types[struct_name] = (ty_list, struct_name)
1164         out_java.write(");\n")
1165         write_c(") {\n")
1166         write_c("\t" + struct_name + "* ret = MALLOC(sizeof(" + struct_name + "), \"" + struct_name + "\");\n")
1167         can_clone = True
1168         clone_str = "static inline " + struct_name + " " + struct_name.replace("LDK", "") + "_clone(const " + struct_name + " *orig) {\n"
1169         clone_str = clone_str + "\t" + struct_name + " ret = {\n"
1170         for idx, line in enumerate(field_lines):
1171             if idx != 0 and idx < len(field_lines) - 2:
1172                 ty_info = map_type(line.strip(';'), False, None, False, False)
1173                 e = chr(ord('a') + idx - 1)
1174                 if ty_info.arg_conv is not None:
1175                     write_c("\t" + ty_info.arg_conv.replace("\n", "\n\t"))
1176                     write_c("\n\tret->" + e + " = " + ty_info.arg_conv_name + ";\n")
1177                 else:
1178                     write_c("\tret->" + e + " = " + e + ";\n")
1179                 if ty_info.arg_conv_cleanup is not None:
1180                     write_c("\t//TODO: Really need to call " + ty_info.arg_conv_cleanup + " here\n")
1181                 if not ty_info.is_native_primitive and (ty_info.rust_obj.replace("LDK", "") + "_clone") not in clone_fns:
1182                     can_clone = False
1183                 elif can_clone and ty_info.is_native_primitive:
1184                     clone_str = clone_str + "\t\t." + chr(ord('a') + idx - 1) + " = orig->" + chr(ord('a') + idx - 1) + ",\n"
1185                 elif can_clone:
1186                     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"
1187         write_c("\treturn (long)ret;\n")
1188         write_c("}\n")
1189
1190         if can_clone:
1191             clone_fns.add(struct_name.replace("LDK", "") + "_clone")
1192             write_c(clone_str)
1193             write_c("\t};\n\treturn ret;\n}\n")
1194
1195         for idx, ty_info in enumerate(ty_list):
1196             e = chr(ord('a') + idx)
1197             out_java.write("\tpublic static native " + ty_info.java_ty + " " + struct_name + "_get_" + e + "(long ptr);\n")
1198             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")
1199             write_c("\t" + struct_name + " *tuple = (" + struct_name + "*)ptr;\n")
1200             conv_info = map_type_with_info(ty_info, False, None, False, True)
1201             if conv_info.ret_conv is not None:
1202                 write_c("\t" + conv_info.ret_conv[0].replace("\n", "\n\t") + "tuple->" + e + conv_info.ret_conv[1].replace("\n", "\n\t") + "\n")
1203                 write_c("\treturn " + conv_info.ret_conv_name + ";\n")
1204             else:
1205                 write_c("\treturn tuple->" + e + ";\n")
1206             write_c("}\n")
1207
1208     out_java.write("""package org.ldk.impl;
1209 import org.ldk.enums.*;
1210
1211 public class bindings {
1212         public static class VecOrSliceDef {
1213                 public long dataptr;
1214                 public long datalen;
1215                 public long stride;
1216                 public VecOrSliceDef(long dataptr, long datalen, long stride) {
1217                         this.dataptr = dataptr; this.datalen = datalen; this.stride = stride;
1218                 }
1219         }
1220         static {
1221                 System.loadLibrary(\"lightningjni\");
1222                 init(java.lang.Enum.class, VecOrSliceDef.class);
1223                 init_class_cache();
1224         }
1225         static native void init(java.lang.Class c, java.lang.Class slicedef);
1226         static native void init_class_cache();
1227
1228         public static native boolean deref_bool(long ptr);
1229         public static native long deref_long(long ptr);
1230         public static native void free_heap_ptr(long ptr);
1231         public static native byte[] read_bytes(long ptr, long len);
1232         public static native byte[] get_u8_slice_bytes(long slice_ptr);
1233         public static native long bytes_to_u8_vec(byte[] bytes);
1234         public static native long new_txpointer_copy_data(byte[] txdata);
1235         public static native void txpointer_free(long ptr);
1236         public static native byte[] txpointer_get_buffer(long ptr);
1237         public static native long vec_slice_len(long vec);
1238         public static native long new_empty_slice_vec();
1239
1240 """)
1241
1242     with open(f"{sys.argv[3]}/structs/CommonBase{consts.file_ext}", "w") as out_java_struct:
1243         out_java_struct.write(consts.common_base)
1244
1245     in_block_comment = False
1246     cur_block_obj = None
1247
1248     const_val_regex = re.compile("^extern const ([A-Za-z_0-9]*) ([A-Za-z_0-9]*);$")
1249
1250     line_indicates_result_regex = re.compile("^   union (LDKCResult_[A-Za-z_0-9]*Ptr) contents;$")
1251     line_indicates_vec_regex = re.compile("^   (struct |enum |union )?([A-Za-z_0-9]*) \*data;$")
1252     line_indicates_opaque_regex = re.compile("^   bool is_owned;$")
1253     line_indicates_trait_regex = re.compile("^   (struct |enum |union )?([A-Za-z_0-9]* \*?)\(\*([A-Za-z_0-9]*)\)\((const )?void \*this_arg(.*)\);$")
1254     assert(line_indicates_trait_regex.match("   uintptr_t (*send_data)(void *this_arg, LDKu8slice data, bool resume_read);"))
1255     assert(line_indicates_trait_regex.match("   struct LDKCVec_MessageSendEventZ (*get_and_clear_pending_msg_events)(const void *this_arg);"))
1256     assert(line_indicates_trait_regex.match("   void *(*clone)(const void *this_arg);"))
1257     assert(line_indicates_trait_regex.match("   struct LDKCVec_u8Z (*write)(const void *this_arg);"))
1258     line_field_var_regex = re.compile("^   struct ([A-Za-z_0-9]*) ([A-Za-z_0-9]*);$")
1259     assert(line_field_var_regex.match("   struct LDKMessageSendEventsProvider MessageSendEventsProvider;"))
1260     assert(line_field_var_regex.match("   struct LDKChannelPublicKeys pubkeys;"))
1261     struct_name_regex = re.compile("^typedef (struct|enum|union) (MUST_USE_STRUCT )?(LDK[A-Za-z_0-9]*) {$")
1262     assert(struct_name_regex.match("typedef struct LDKCVec_u8Z {"))
1263     assert(struct_name_regex.match("typedef enum LDKNetwork {"))
1264
1265     union_enum_items = {}
1266     result_ptr_struct_items = {}
1267     for line in in_h:
1268         if in_block_comment:
1269             if line.endswith("*/\n"):
1270                 in_block_comment = False
1271         elif cur_block_obj is not None:
1272             cur_block_obj  = cur_block_obj + line
1273             if line.startswith("} "):
1274                 field_lines = []
1275                 struct_name = None
1276                 vec_ty = None
1277                 obj_lines = cur_block_obj.split("\n")
1278                 is_opaque = False
1279                 result_contents = None
1280                 is_unitary_enum = False
1281                 is_union_enum = False
1282                 is_union = False
1283                 is_tuple = False
1284                 trait_fn_lines = []
1285                 field_var_lines = []
1286
1287                 for idx, struct_line in enumerate(obj_lines):
1288                     if struct_line.strip().startswith("/*"):
1289                         in_block_comment = True
1290                     if in_block_comment:
1291                         if struct_line.endswith("*/"):
1292                             in_block_comment = False
1293                     else:
1294                         struct_name_match = struct_name_regex.match(struct_line)
1295                         if struct_name_match is not None:
1296                             struct_name = struct_name_match.group(3)
1297                             if struct_name_match.group(1) == "enum":
1298                                 if not struct_name.endswith("_Tag"):
1299                                     is_unitary_enum = True
1300                                 else:
1301                                     is_union_enum = True
1302                             elif struct_name_match.group(1) == "union":
1303                                 is_union = True
1304                         if line_indicates_opaque_regex.match(struct_line):
1305                             is_opaque = True
1306                         result_match = line_indicates_result_regex.match(struct_line)
1307                         if result_match is not None:
1308                             result_contents = result_match.group(1)
1309                         vec_ty_match = line_indicates_vec_regex.match(struct_line)
1310                         if vec_ty_match is not None and struct_name.startswith("LDKCVec_"):
1311                             vec_ty = vec_ty_match.group(2)
1312                         elif struct_name.startswith("LDKC2Tuple_") or struct_name.startswith("LDKC3Tuple_"):
1313                             is_tuple = True
1314                         trait_fn_match = line_indicates_trait_regex.match(struct_line)
1315                         if trait_fn_match is not None:
1316                             trait_fn_lines.append(trait_fn_match)
1317                         field_var_match = line_field_var_regex.match(struct_line)
1318                         if field_var_match is not None:
1319                             field_var_lines.append(field_var_match)
1320                         field_lines.append(struct_line)
1321
1322                 assert(struct_name is not None)
1323                 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))
1324                 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))
1325                 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))
1326                 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))
1327                 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))
1328                 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))
1329                 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))
1330
1331                 if is_opaque:
1332                     opaque_structs.add(struct_name)
1333                     with open(f"{sys.argv[3]}/structs/{struct_name.replace('LDK', '')}{consts.file_ext}", "w") as out_java_struct:
1334                         out_java_struct.write(consts.hu_struct_file_prefix)
1335                         out_java_struct.write("public class " + struct_name.replace("LDK","") + " extends CommonBase")
1336                         if struct_name.startswith("LDKLocked"):
1337                             out_java_struct.write(" implements AutoCloseable")
1338                         out_java_struct.write(" {\n")
1339                         out_java_struct.write("\t" + struct_name.replace("LDK", "") + "(Object _dummy, long ptr) { super(ptr); }\n")
1340                         if struct_name.startswith("LDKLocked"):
1341                             out_java_struct.write("\t@Override public void close() {\n")
1342                         else:
1343                             out_java_struct.write("\t@Override @SuppressWarnings(\"deprecation\")\n")
1344                             out_java_struct.write("\tprotected void finalize() throws Throwable {\n")
1345                             out_java_struct.write("\t\tsuper.finalize();\n")
1346                         out_java_struct.write("\t\tif (ptr != 0) { bindings." + struct_name.replace("LDK","") + "_free(ptr); }\n")
1347                         out_java_struct.write("\t}\n\n")
1348                 elif result_contents is not None:
1349                     assert result_contents in result_ptr_struct_items
1350                     res_ty, err_ty = result_ptr_struct_items[result_contents]
1351                     map_result(struct_name, res_ty, err_ty)
1352                 elif struct_name.startswith("LDKCResult_") and struct_name.endswith("ZPtr"):
1353                     for line in field_lines:
1354                         if line.endswith("*result;"):
1355                             res_ty = line[:-8].strip()
1356                         elif line.endswith("*err;"):
1357                             err_ty = line[:-5].strip()
1358                     result_ptr_struct_items[struct_name] = (res_ty, err_ty)
1359                     result_types.add(struct_name[:-3])
1360                 elif is_tuple:
1361                     map_tuple(struct_name, field_lines)
1362                 elif vec_ty is not None:
1363                     ty_info = map_type(vec_ty + " arr_elem", False, None, False, False)
1364                     if len(ty_info.java_fn_ty_arg) == 1: # ie we're a primitive of some form
1365                         out_java.write("\tpublic static native long " + struct_name + "_new(" + ty_info.java_ty + "[] elems);\n")
1366                         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")
1367                         write_c("\t" + struct_name + " *ret = MALLOC(sizeof(" + struct_name + "), \"" + struct_name + "\");\n")
1368                         write_c("\tret->datalen = " + consts.get_native_arr_len_call[0] + "elems" + consts.get_native_arr_len_call[1] + ";\n")
1369                         write_c("\tif (ret->datalen == 0) {\n")
1370                         write_c("\t\tret->data = NULL;\n")
1371                         write_c("\t} else {\n")
1372                         write_c("\t\tret->data = MALLOC(sizeof(" + vec_ty + ") * ret->datalen, \"" + struct_name + " Data\");\n")
1373                         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")
1374                         write_c("\t\tfor (size_t i = 0; i < ret->datalen; i++) {\n")
1375                         if ty_info.arg_conv is not None:
1376                             write_c("\t\t\t" + ty_info.c_ty + " arr_elem = java_elems[i];\n")
1377                             write_c("\t\t\t" + ty_info.arg_conv.replace("\n", "\n\t\t\t") + "\n")
1378                             write_c("\t\t\tret->data[i] = " + ty_info.arg_conv_name + ";\n")
1379                             assert ty_info.arg_conv_cleanup is None
1380                         else:
1381                             write_c("\t\t\tret->data[i] = java_elems[i];\n")
1382                         write_c("\t\t}\n")
1383                         cleanup = consts.release_native_arr_ptr_call("elems", "java_elems")
1384                         if cleanup is not None:
1385                             write_c("\t\t" + cleanup + ";\n")
1386                         write_c("\t}\n")
1387                         write_c("\treturn (long)ret;\n")
1388                         write_c("}\n")
1389
1390                     if ty_info.is_native_primitive:
1391                         clone_fns.add(struct_name.replace("LDK", "") + "_clone")
1392                         write_c("static inline " + struct_name + " " + struct_name.replace("LDK", "") + "_clone(const " + struct_name + " *orig) {\n")
1393                         write_c("\t" + struct_name + " ret = { .data = MALLOC(sizeof(" + ty_info.c_ty + ") * orig->datalen, \"" + struct_name + " clone bytes\"), .datalen = orig->datalen };\n")
1394                         write_c("\tmemcpy(ret.data, orig->data, sizeof(" + ty_info.c_ty + ") * ret.datalen);\n")
1395                         write_c("\treturn ret;\n}\n")
1396                     elif (ty_info.rust_obj.replace("LDK", "") + "_clone") in clone_fns:
1397                         ty_name = "CVec_" + ty_info.rust_obj.replace("LDK", "") + "Z";
1398                         clone_fns.add(ty_name + "_clone")
1399                         write_c("static inline " + struct_name + " " + ty_name + "_clone(const " + struct_name + " *orig) {\n")
1400                         write_c("\t" + struct_name + " ret = { .data = MALLOC(sizeof(" + ty_info.rust_obj + ") * orig->datalen, \"" + struct_name + " clone bytes\"), .datalen = orig->datalen };\n")
1401                         write_c("\tfor (size_t i = 0; i < ret.datalen; i++) {\n")
1402                         write_c("\t\tret.data[i] = " + ty_info.rust_obj.replace("LDK", "") + "_clone(&orig->data[i]);\n")
1403                         write_c("\t}\n\treturn ret;\n}\n")
1404                 elif is_union_enum:
1405                     assert(struct_name.endswith("_Tag"))
1406                     struct_name = struct_name[:-4]
1407                     union_enum_items[struct_name] = {"field_lines": field_lines}
1408                 elif struct_name.endswith("_Body") and struct_name.split("_")[0] in union_enum_items:
1409                     enum_var_name = struct_name.split("_")
1410                     union_enum_items[enum_var_name[0]][enum_var_name[1]] = field_lines
1411                 elif struct_name in union_enum_items:
1412                     map_complex_enum(struct_name, union_enum_items[struct_name])
1413                 elif is_unitary_enum:
1414                     map_unitary_enum(struct_name, field_lines)
1415                 elif len(trait_fn_lines) > 0:
1416                     trait_structs.add(struct_name)
1417                     map_trait(struct_name, field_var_lines, trait_fn_lines)
1418                 elif struct_name == "LDKTxOut":
1419                     with open(f"{sys.argv[3]}/structs/TxOut{consts.file_ext}", "w") as out_java_struct:
1420                         out_java_struct.write(consts.hu_struct_file_prefix)
1421                         out_java_struct.write("public class TxOut extends CommonBase{\n")
1422                         out_java_struct.write("\tTxOut(java.lang.Object _dummy, long ptr) { super(ptr); }\n")
1423                         out_java_struct.write("\tlong to_c_ptr() { return 0; }\n")
1424                         out_java_struct.write("\t@Override @SuppressWarnings(\"deprecation\")\n")
1425                         out_java_struct.write("\tprotected void finalize() throws Throwable {\n")
1426                         out_java_struct.write("\t\tsuper.finalize();\n")
1427                         out_java_struct.write("\t\tif (ptr != 0) { bindings.TxOut_free(ptr); }\n")
1428                         out_java_struct.write("\t}\n")
1429                         # TODO: TxOut body
1430                         out_java_struct.write("}")
1431                 else:
1432                     pass # Everything remaining is a byte[] or some form
1433                 cur_block_obj = None
1434         else:
1435             fn_ptr = fn_ptr_regex.match(line)
1436             fn_ret_arr = fn_ret_arr_regex.match(line)
1437             reg_fn = reg_fn_regex.match(line)
1438             const_val = const_val_regex.match(line)
1439
1440             if line.startswith("#include <"):
1441                 pass
1442             elif line.startswith("/*"):
1443                 #out_java.write("\t" + line)
1444                 if not line.endswith("*/\n"):
1445                     in_block_comment = True
1446             elif line.startswith("typedef enum "):
1447                 cur_block_obj = line
1448             elif line.startswith("typedef struct "):
1449                 cur_block_obj = line
1450             elif line.startswith("typedef union "):
1451                 cur_block_obj = line
1452             elif fn_ptr is not None:
1453                 map_fn(line, fn_ptr, None, None)
1454             elif fn_ret_arr is not None:
1455                 map_fn(line, fn_ret_arr, fn_ret_arr.group(4), None)
1456             elif reg_fn is not None:
1457                 map_fn(line, reg_fn, None, None)
1458             elif const_val_regex is not None:
1459                 # TODO Map const variables
1460                 pass
1461             else:
1462                 assert(line == "\n")
1463
1464     out_java.write("}\n")
1465     for struct_name in opaque_structs:
1466         with open(f"{sys.argv[3]}/structs/{struct_name.replace('LDK', '')}{consts.file_ext}", "a") as out_java_struct:
1467             out_java_struct.write("}\n")
1468     for struct_name in trait_structs:
1469         with open(f"{sys.argv[3]}/structs/{struct_name.replace('LDK', '')}{consts.file_ext}", "a") as out_java_struct:
1470             out_java_struct.write("}\n")
1471 with open(sys.argv[4], "w") as out_c:
1472     out_c.write(consts.c_file_pfx)
1473     out_c.write(consts.init_str(c_array_class_caches))
1474     out_c.write(c_file)