_ 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['uint8_t']
 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         mapped_type = consts.c_type_map['uint16_t']
 196         java_ty = mapped_type[0]
 197         c_ty = "jshort"
 198         fn_ty_arg = "S"
 199         fn_arg = fn_arg[8:].strip()
 200         is_primitive = True
 201     elif fn_arg.startswith("uint32_t"):
 202         mapped_type = consts.c_type_map['uint32_t']
 203         java_ty = mapped_type[0]
 204         c_ty = "int32_t"
 205         fn_ty_arg = "I"
 206         fn_arg = fn_arg[8:].strip()
 207         is_primitive = True
 208     elif fn_arg.startswith("uint64_t") or fn_arg.startswith("uintptr_t"):
 209         # TODO: uintptr_t is arch-dependent :(
 210         mapped_type = consts.c_type_map['long']
 211         java_ty = mapped_type[0]
 212         c_ty = "int64_t"
 213         fn_ty_arg = "J"
 214         if fn_arg.startswith("uint64_t"):
 215             fn_arg = fn_arg[8:].strip()
 216         else:
 217             fn_arg = fn_arg[9:].strip()
 218         is_primitive = True
 219     elif is_const and fn_arg.startswith("char *"):
 220         java_ty = "String"
 221         c_ty = "const char*"
 222         fn_ty_arg = "Ljava/lang/String;"
 223         fn_arg = fn_arg[6:].strip()
 224     elif fn_arg.startswith("LDKStr"):
 225         java_ty = "String"
 226         c_ty = "jstring"
 227         fn_ty_arg = "Ljava/lang/String;"
 228         fn_arg = fn_arg[6:].strip()
 229         arr_access = "chars"
 230         arr_len = "len"
 231     else:
 232         ma = var_ty_regex.match(fn_arg)
 233         if ma.group(1).strip() in unitary_enums:
 234             java_ty = ma.group(1).strip()
 235             c_ty = consts.result_c_ty
 236             fn_ty_arg = "Lorg/ldk/enums/" + ma.group(1).strip() + ";"
 237             fn_arg = ma.group(2).strip()
 238             rust_obj = ma.group(1).strip()
 239         elif ma.group(1).strip().startswith("LDKC2Tuple"):
 240             c_ty = consts.ptr_c_ty
 241             java_ty = consts.ptr_native_ty
 242             java_hu_ty = "TwoTuple<"
 243             if not ma.group(1).strip() in tuple_types:
 244                 assert java_c_types_none_allowed
 245                 return None
 246             for idx, ty_info in enumerate(tuple_types[ma.group(1).strip()][0]):
 247                 if idx != 0:
 248                     java_hu_ty = java_hu_ty + ", "
 249                 if ty_info.is_native_primitive:
 250                     if ty_info.java_hu_ty == "int":
 251                         java_hu_ty = java_hu_ty + "Integer" # Java concrete integer type is Integer, not Int
 252                     else:
 253                         java_hu_ty = java_hu_ty + ty_info.java_hu_ty.title() # If we're a primitive, capitalize the first letter
 254                 else:
 255                     java_hu_ty = java_hu_ty + ty_info.java_hu_ty
 256             java_hu_ty = java_hu_ty + ">"
 257             fn_ty_arg = "J"
 258             fn_arg = ma.group(2).strip()
 259             rust_obj = ma.group(1).strip()
 260             take_by_ptr = True
 261         elif ma.group(1).strip().startswith("LDKC3Tuple"):
 262             c_ty = consts.ptr_c_ty
 263             java_ty = consts.ptr_native_ty
 264             java_hu_ty = "ThreeTuple<"
 265             if not ma.group(1).strip() in tuple_types:
 266                 assert java_c_types_none_allowed
 267                 return None
 268             for idx, ty_info in enumerate(tuple_types[ma.group(1).strip()][0]):
 269                 if idx != 0:
 270                     java_hu_ty = java_hu_ty + ", "
 271                 if ty_info.is_native_primitive:
 272                     if ty_info.java_hu_ty == "int":
 273                         java_hu_ty = java_hu_ty + "Integer" # Java concrete integer type is Integer, not Int
 274                     else:
 275                         java_hu_ty = java_hu_ty + ty_info.java_hu_ty.title() # If we're a primitive, capitalize the first letter
 276                 else:
 277                     java_hu_ty = java_hu_ty + ty_info.java_hu_ty
 278             java_hu_ty = java_hu_ty + ">"
 279             fn_ty_arg = "J"
 280             fn_arg = ma.group(2).strip()
 281             rust_obj = ma.group(1).strip()
 282             take_by_ptr = True
 283         else:
 284             c_ty = consts.ptr_c_ty
 285             java_ty = consts.ptr_native_ty
 286             java_hu_ty = ma.group(1).strip().replace("LDKCResult", "Result").replace("LDK", "")
 287             fn_ty_arg = "J"
 288             fn_arg = ma.group(2).strip()
 289             rust_obj = ma.group(1).strip()
 290             take_by_ptr = True
 291
 292     if fn_arg.startswith(" *") or fn_arg.startswith("*"):
 293         fn_arg = fn_arg.replace("*", "").strip()
 294         is_ptr = True
 295         c_ty = consts.ptr_c_ty
 296         java_ty = consts.ptr_native_ty
 297         fn_ty_arg = "J"
 298         is_primitive = False
 299
 300     var_is_arr = var_is_arr_regex.match(fn_arg)
 301     if var_is_arr is not None or ret_arr_len is not None:
 302         assert(not take_by_ptr)
 303         assert(not is_ptr)
 304         # is there a special case for plurals?
 305         if len(mapped_type) == 2:
 306             java_ty = mapped_type[1]
 307         else:
 308             java_ty = java_ty + "[]"
 309         c_ty = c_ty + "Array"
 310         if var_is_arr is not None:
 311             if var_is_arr.group(1) == "":
 312                 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,
 313                     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)
 314             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,
 315                 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)
 316
 317     if java_hu_ty is None:
 318         java_hu_ty = java_ty
 319     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,
 320         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)
 321
 322 fn_ptr_regex = re.compile("^extern const ([A-Za-z_0-9\* ]*) \(\*(.*)\)\((.*)\);$")
 323 fn_ret_arr_regex = re.compile("(.*) \(\*(.*)\((.*)\)\)\[([0-9]*)\];$")
 324 reg_fn_regex = re.compile("([A-Za-z_0-9\* ]* \*?)([a-zA-Z_0-9]*)\((.*)\);$")
 325 clone_fns = set()
 326 constructor_fns = {}
 327 c_array_class_caches = set()
 328 with open(sys.argv[1]) as in_h:
 329     for line in in_h:
 330         reg_fn = reg_fn_regex.match(line)
 331         if reg_fn is not None:
 332             if reg_fn.group(2).endswith("_clone"):
 333                 clone_fns.add(reg_fn.group(2))
 334             else:
 335                 rty = java_c_types(reg_fn.group(1), None)
 336                 if rty is not None and rty.rust_obj is not None and reg_fn.group(2) == rty.java_hu_ty + "_new":
 337                     constructor_fns[rty.rust_obj] = reg_fn.group(3)
 338             continue
 339         arr_fn = fn_ret_arr_regex.match(line)
 340         if arr_fn is not None:
 341             if arr_fn.group(2).endswith("_clone"):
 342                 clone_fns.add(arr_fn.group(2))
 343             # No object constructors return arrays, as then they wouldn't be an object constructor
 344             continue
 345
 346 # Define some manual clones...
 347 clone_fns.add("ThirtyTwoBytes_clone")
 348 write_c("static inline struct LDKThirtyTwoBytes ThirtyTwoBytes_clone(const struct LDKThirtyTwoBytes *orig) { struct LDKThirtyTwoBytes ret; memcpy(ret.data, orig->data, 32); return ret; }\n")
 349
 350 java_c_types_none_allowed = False # C structs created by cbindgen are declared in dependency order
 351
 352 with open(sys.argv[1]) as in_h, open(sys.argv[2], "w") as out_java:
 353     def map_type(fn_arg, print_void, ret_arr_len, is_free, holds_ref):
 354         ty_info = java_c_types(fn_arg, ret_arr_len)
 355         return map_type_with_info(ty_info, print_void, ret_arr_len, is_free, holds_ref)
 356
 357     def map_type_with_info(ty_info, print_void, ret_arr_len, is_free, holds_ref):
 358         if ty_info.c_ty == "void":
 359             if not print_void:
 360                 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 361                     arg_conv = None, arg_conv_name = None, arg_conv_cleanup = None,
 362                     ret_conv = None, ret_conv_name = None, to_hu_conv = None, to_hu_conv_name = None, from_hu_conv = None)
 363         if ty_info.c_ty.endswith("Array"):
 364             arr_len = ty_info.arr_len
 365             if arr_len is not None:
 366                 arr_name = ty_info.var_name
 367             else:
 368                 arr_name = "ret"
 369                 arr_len = ret_arr_len
 370             if ty_info.c_ty == "int8_tArray":
 371                 (set_pfx, set_sfx) = consts.set_native_arr_contents(arr_name + "_arr", arr_len, ty_info)
 372                 ret_conv = ("int8_tArray " + arr_name + "_arr = " + consts.create_native_arr_call(arr_len, ty_info) + ";\n" + set_pfx, "")
 373                 arg_conv_cleanup = None
 374                 if not arr_len.isdigit():
 375                     arg_conv = ty_info.rust_obj + " " + arr_name + "_ref;\n"
 376                     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"
 377                     if (not ty_info.is_ptr or not holds_ref) and ty_info.rust_obj != "LDKu8slice":
 378                         arg_conv = arg_conv + arr_name + "_ref." + ty_info.arr_access + " = MALLOC(" + arr_name + "_ref." + arr_len + ", \"" + ty_info.rust_obj + " Bytes\");\n"
 379                         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) + ";"
 380                     else:
 381                         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) + ";"
 382                         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)
 383                     if ty_info.rust_obj == "LDKTransaction":
 384                         arg_conv = arg_conv + "\n" + arr_name + "_ref.data_is_owned = " + str(holds_ref).lower() + ";"
 385                     ret_conv = (ty_info.rust_obj + " " + arr_name + "_var = ", "")
 386                     ret_conv = (ret_conv[0], ";\nint8_tArray " + arr_name + "_arr = " + consts.create_native_arr_call(arr_name + "_var." + arr_len, ty_info) + ";\n")
 387                     (pfx, sfx) = consts.set_native_arr_contents(arr_name + "_arr", arr_name + "_var." + arr_len, ty_info)
 388                     ret_conv = (ret_conv[0], ret_conv[1] + pfx + arr_name + "_var." + ty_info.arr_access + sfx + ";")
 389                     if not holds_ref and ty_info.rust_obj != "LDKu8slice":
 390                         ret_conv = (ret_conv[0], ret_conv[1] + "\n" + ty_info.rust_obj.replace("LDK", "") + "_free(" + arr_name + "_var);")
 391                 elif ty_info.rust_obj is not None:
 392                     arg_conv = ty_info.rust_obj + " " + arr_name + "_ref;\n"
 393                     arg_conv = arg_conv + "CHECK(" + consts.get_native_arr_len_call[0] + arr_name + consts.get_native_arr_len_call[1] + " == " + arr_len + ");\n"
 394                     arg_conv = arg_conv + consts.get_native_arr_contents(arr_name, arr_name + "_ref." + ty_info.arr_access, arr_len, ty_info, True) + ";"
 395                     ret_conv = (ret_conv[0], "." + ty_info.arr_access + set_sfx + ";")
 396                 else:
 397                     arg_conv = "unsigned char " + arr_name + "_arr[" + arr_len + "];\n"
 398                     arg_conv = arg_conv + "CHECK(" + consts.get_native_arr_len_call[0] + arr_name + consts.get_native_arr_len_call[1] + " == " + arr_len + ");\n"
 399                     arg_conv = arg_conv + consts.get_native_arr_contents(arr_name, arr_name + "_arr", arr_len, ty_info, True) + ";\n"
 400                     arg_conv = arg_conv + "unsigned char (*" + arr_name + "_ref)[" + arr_len + "] = &" + arr_name + "_arr;"
 401                     ret_conv = (ret_conv[0] + "*", set_sfx + ";")
 402                 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 403                     arg_conv = arg_conv, arg_conv_name = arr_name + "_ref", arg_conv_cleanup = arg_conv_cleanup,
 404                     ret_conv = ret_conv, ret_conv_name = arr_name + "_arr", to_hu_conv = None, to_hu_conv_name = None, from_hu_conv = None)
 405             else:
 406                 assert not arr_len.isdigit() # fixed length arrays not implemented
 407                 assert ty_info.java_ty[len(ty_info.java_ty) - 2:] == "[]"
 408                 conv_name = "arr_conv_" + str(len(ty_info.java_hu_ty))
 409                 idxc = chr(ord('a') + (len(ty_info.java_hu_ty) % 26))
 410                 ty_info.subty.var_name = conv_name
 411                 #XXX: We'd really prefer to only ever set to False, avoiding lots of clone, but need smarter free logic
 412                 #if ty_info.is_ptr or holds_ref:
 413                 #    ty_info.subty.requires_clone = False
 414                 ty_info.subty.requires_clone = not ty_info.is_ptr or not holds_ref
 415                 subty = map_type_with_info(ty_info.subty, False, None, is_free, holds_ref)
 416                 if arr_name == "":
 417                     arr_name = "arg"
 418                 arg_conv = ty_info.rust_obj + " " + arr_name + "_constr;\n"
 419                 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"
 420                 arg_conv = arg_conv + "if (" + arr_name + "_constr." + arr_len + " > 0)\n"
 421                 if subty.rust_obj is None:
 422                     szof = subty.c_ty
 423                 else:
 424                     szof = subty.rust_obj
 425                 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"
 426                 arg_conv = arg_conv + "else\n"
 427                 arg_conv = arg_conv + "\t" + arr_name + "_constr." + ty_info.arr_access + " = NULL;\n"
 428                 get_arr = consts.get_native_arr_contents(arr_name, "NO_DEST", arr_name + "_constr." + arr_len, ty_info, False)
 429                 if get_arr != None:
 430                     arg_conv = arg_conv + subty.c_ty + "* " + arr_name + "_vals = " + get_arr + ";\n"
 431                 arg_conv = arg_conv + "for (size_t " + idxc + " = 0; " + idxc + " < " + arr_name + "_constr." + arr_len + "; " + idxc + "++) {\n"
 432                 if get_arr != None:
 433                     arg_conv = arg_conv + "\t" + subty.c_ty + " " + conv_name + " = " + arr_name + "_vals[" + idxc + "];"
 434                     if subty.arg_conv is not None:
 435                         arg_conv = arg_conv + "\n\t" + subty.arg_conv.replace("\n", "\n\t")
 436                 else:
 437                     arg_conv = arg_conv + "\t" + subty.c_ty + " " + conv_name + " = " + consts.get_native_arr_elem(arr_name, idxc, ty_info) + ";\n"
 438                     arg_conv = arg_conv + "\t" + subty.arg_conv.replace("\n", "\n\t")
 439                 arg_conv = arg_conv + "\n\t" + arr_name + "_constr." + ty_info.arr_access + "[" + idxc + "] = " + subty.arg_conv_name + ";\n}"
 440                 if get_arr != None:
 441                     cleanup = consts.cleanup_native_arr_ref_contents(arr_name, arr_name + "_vals", arr_name + "_constr." + arr_len, ty_info)
 442                     if cleanup is not None:
 443                         arg_conv = arg_conv + "\n" + cleanup + ";"
 444                 if ty_info.is_ptr:
 445                     arg_conv_name = "&" + arr_name + "_constr"
 446                 else:
 447                     arg_conv_name = arr_name + "_constr"
 448                 arg_conv_cleanup = None
 449                 if ty_info.is_ptr:
 450                     arg_conv_cleanup = "FREE(" + arr_name + "_constr." + ty_info.arr_access + ");"
 451
 452                 if arr_name == "arg":
 453                     arr_name = "ret"
 454                 ret_conv = (ty_info.rust_obj + " " + arr_name + "_var = ", "")
 455                 if subty.ret_conv is None:
 456                     ret_conv = ("DUMMY", "DUMMY")
 457                 elif not ty_info.java_ty[:len(ty_info.java_ty) - 2].endswith("[]"):
 458                     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")
 459                     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")
 460                     ret_conv = (ret_conv[0], ret_conv[1] + "for (size_t " + idxc + " = 0; " + idxc + " < " + arr_name + "_var." + arr_len + "; " + idxc + "++) {\n")
 461                     ret_conv = (ret_conv[0], ret_conv[1] + "\t" + subty.ret_conv[0].replace("\n", "\n\t"))
 462                     ret_conv = (ret_conv[0], ret_conv[1] + arr_name + "_var." + ty_info.arr_access + "[" + idxc + "]" + subty.ret_conv[1].replace("\n", "\n\t"))
 463                     ret_conv = (ret_conv[0], ret_conv[1] + "\n\t" + arr_name + "_arr_ptr[" + idxc + "] = " + subty.ret_conv_name + ";\n}")
 464                     cleanup = consts.release_native_arr_ptr_call(arr_name + "_arr", arr_name + "_arr_ptr")
 465                     if cleanup is not None:
 466                         ret_conv = (ret_conv[0], ret_conv[1] + "\n" + cleanup + ";")
 467                 else:
 468                     assert ty_info.java_fn_ty_arg.startswith("[")
 469                     clz_var = ty_info.java_fn_ty_arg[1:].replace("[", "arr_of_")
 470                     c_array_class_caches.add(clz_var)
 471                     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")
 472                     ret_conv = (ret_conv[0], ret_conv[1] + "for (size_t " + idxc + " = 0; " + idxc + " < " + arr_name + "_var." + arr_len + "; " + idxc + "++) {\n")
 473                     ret_conv = (ret_conv[0], ret_conv[1] + "\t" + subty.ret_conv[0].replace("\n", "\n\t"))
 474                     ret_conv = (ret_conv[0], ret_conv[1] + arr_name + "_var." + ty_info.arr_access + "[" + idxc + "]" + subty.ret_conv[1].replace("\n", "\n\t"))
 475                     ret_conv = (ret_conv[0], ret_conv[1] + "\n\t(*env)->SetObjectArrayElement(env, " + arr_name + "_arr, " + idxc + ", " + subty.ret_conv_name + ");\n")
 476                     ret_conv = (ret_conv[0], ret_conv[1] + "}")
 477                 if not holds_ref:
 478                     # XXX: The commented if's are a bit smarter freeing, but we need to be a nudge smarter still
 479                     # Note that we don't drop the full vec here - we're passing ownership to java (or have cloned) or free'd by now!
 480                     ret_conv = (ret_conv[0], ret_conv[1] + "\nFREE(" + arr_name + "_var." + ty_info.arr_access + ");")
 481                     #if subty.rust_obj is not None and subty.rust_obj in opaque_structs:
 482                     #    ret_conv = (ret_conv[0], ret_conv[1] + "\nFREE(" + arr_name + "_var." + ty_info.arr_access + ");")
 483                     #else:
 484                     #    ret_conv = (ret_conv[0], ret_conv[1] + "\n" + ty_info.rust_obj.replace("LDK", "") + "_free(" + arr_name + "_var);")
 485
 486                 to_hu_conv = None
 487                 to_hu_conv_name = None
 488                 if subty.to_hu_conv is not None:
 489                     to_hu_conv = ty_info.java_hu_ty + " " + conv_name + "_arr = new " + ty_info.subty.java_hu_ty.split("<")[0] + "[" + arr_name + ".length];\n"
 490                     to_hu_conv = to_hu_conv + "for (int " + idxc + " = 0; " + idxc + " < " + arr_name + ".length; " + idxc + "++) {\n"
 491                     to_hu_conv = to_hu_conv + "\t" + subty.java_ty + " " + conv_name + " = " + arr_name + "[" + idxc + "];\n"
 492                     to_hu_conv = to_hu_conv + "\t" + subty.to_hu_conv.replace("\n", "\n\t") + "\n"
 493                     to_hu_conv = to_hu_conv + "\t" + conv_name + "_arr[" + idxc + "] = " + subty.to_hu_conv_name + ";\n}"
 494                     to_hu_conv_name = conv_name + "_arr"
 495                 from_hu_conv = None
 496                 if subty.from_hu_conv is not None:
 497                     if subty.java_ty == "long" and subty.java_hu_ty != "long":
 498                         from_hu_conv = ("Arrays.stream(" + arr_name + ").mapToLong(" + conv_name + " -> " + subty.from_hu_conv[0] + ").toArray()", "/* TODO 2 " + subty.java_hu_ty + "  */")
 499                     elif subty.java_ty == "long":
 500                         from_hu_conv = ("Arrays.stream(" + arr_name + ").map(" + conv_name + " -> " + subty.from_hu_conv[0] + ").toArray()", "/* TODO 2 " + subty.java_hu_ty + "  */")
 501                     else:
 502                         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 + "  */")
 503
 504                 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 505                     arg_conv = arg_conv, arg_conv_name = arg_conv_name, arg_conv_cleanup = arg_conv_cleanup,
 506                     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)
 507         elif ty_info.java_ty == "String":
 508             if ty_info.arr_access is None:
 509                 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 510                     arg_conv = None, arg_conv_name = None, arg_conv_cleanup = None,
 511                     ret_conv = ("jstring " + ty_info.var_name + "_conv = (*env)->NewStringUTF(env, ", ");"), ret_conv_name = ty_info.var_name + "_conv",
 512                     to_hu_conv = None, to_hu_conv_name = None, from_hu_conv = None)
 513             else:
 514                 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 515                     arg_conv = None, arg_conv_name = None, arg_conv_cleanup = None,
 516                     ret_conv = ("LDKStr " + ty_info.var_name + "_str = ",
 517                         ";\nchar* " + ty_info.var_name + "_buf = MALLOC(" + ty_info.var_name + "_str." + ty_info.arr_len + " + 1, \"str conv buf\");\n" +
 518                         "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" +
 519                         ty_info.var_name + "_buf[" + ty_info.var_name + "_str." + ty_info.arr_len + "] = 0;\n" +
 520                         "jstring " + ty_info.var_name + "_conv = (*env)->NewStringUTF(env, " + ty_info.var_name + "_str." + ty_info.arr_access + ");\n" +
 521                         "FREE(" + ty_info.var_name + "_buf);"),
 522                     ret_conv_name = ty_info.var_name + "_conv", to_hu_conv = None, to_hu_conv_name = None, from_hu_conv = None)
 523         elif ty_info.var_name == "" and not print_void:
 524             # We don't have a parameter name, and want one, just call it arg
 525             if ty_info.rust_obj is not None:
 526                 assert(not is_free or ty_info.rust_obj not in opaque_structs)
 527                 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 528                     arg_conv = ty_info.rust_obj + " arg_conv = *(" + ty_info.rust_obj + "*)arg;\nFREE((void*)arg);",
 529                     arg_conv_name = "arg_conv", arg_conv_cleanup = None,
 530                     ret_conv = None, ret_conv_name = None, to_hu_conv = "TODO 7", to_hu_conv_name = None, from_hu_conv = None)
 531             else:
 532                 assert(not is_free)
 533                 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 534                     arg_conv = None, arg_conv_name = "arg", arg_conv_cleanup = None,
 535                     ret_conv = None, ret_conv_name = None, to_hu_conv = "TODO 8", to_hu_conv_name = None, from_hu_conv = None)
 536         elif ty_info.rust_obj is None:
 537             return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 538                 arg_conv = None, arg_conv_name = ty_info.var_name, arg_conv_cleanup = None,
 539                 ret_conv = None, ret_conv_name = None, to_hu_conv = None, to_hu_conv_name = None, from_hu_conv = None)
 540         else:
 541             if ty_info.var_name == "":
 542                 ty_info.var_name = "ret"
 543
 544             if ty_info.rust_obj in opaque_structs:
 545                 opaque_arg_conv = ty_info.rust_obj + " " + ty_info.var_name + "_conv;\n"
 546                 opaque_arg_conv = opaque_arg_conv + ty_info.var_name + "_conv.inner = (void*)(" + ty_info.var_name + " & (~1));\n"
 547                 if ty_info.is_ptr and holds_ref:
 548                     opaque_arg_conv = opaque_arg_conv + ty_info.var_name + "_conv.is_owned = false;"
 549                 else:
 550                     opaque_arg_conv = opaque_arg_conv + ty_info.var_name + "_conv.is_owned = (" + ty_info.var_name + " & 1) || (" + ty_info.var_name + " == 0);"
 551                 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:
 552                     if (ty_info.rust_obj.replace("LDK", "") + "_clone") in clone_fns:
 553                         # 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.
 554                         opaque_arg_conv = opaque_arg_conv + "\nif (" + ty_info.var_name + "_conv.inner != NULL)\n"
 555                         opaque_arg_conv = opaque_arg_conv + "\t" + ty_info.var_name + "_conv = " + ty_info.rust_obj.replace("LDK", "") + "_clone(&" + ty_info.var_name + "_conv);"
 556                     elif ty_info.passed_as_ptr:
 557                         opaque_arg_conv = opaque_arg_conv + "\n// Warning: we may need a move here but can't clone!"
 558
 559                 opaque_ret_conv_suf = ";\n"
 560                 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
 561                     opaque_ret_conv_suf = opaque_ret_conv_suf + "if (" + ty_info.var_name + "->inner != NULL)\n"
 562                     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"
 563                 elif not holds_ref and ty_info.is_ptr:
 564                     opaque_ret_conv_suf = opaque_ret_conv_suf + "// Warning: we may need a move here but can't clone!\n"
 565
 566                 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"
 567                 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"
 568                 if holds_ref:
 569                     opaque_ret_conv_suf = opaque_ret_conv_suf + "long " + ty_info.var_name + "_ref = (long)" + ty_info.var_name + "_var.inner & ~1;"
 570                 else:
 571                     opaque_ret_conv_suf = opaque_ret_conv_suf + "long " + ty_info.var_name + "_ref = (long)" + ty_info.var_name + "_var.inner;\n"
 572                     opaque_ret_conv_suf = opaque_ret_conv_suf + "if (" + ty_info.var_name + "_var.is_owned) {\n"
 573                     opaque_ret_conv_suf = opaque_ret_conv_suf + "\t" + ty_info.var_name + "_ref |= 1;\n"
 574                     opaque_ret_conv_suf = opaque_ret_conv_suf + "}"
 575
 576                 if ty_info.is_ptr:
 577                     return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 578                         arg_conv = opaque_arg_conv, arg_conv_name = "&" + ty_info.var_name + "_conv", arg_conv_cleanup = None,
 579                         ret_conv = (ty_info.rust_obj + " " + ty_info.var_name + "_var = *", opaque_ret_conv_suf),
 580                         ret_conv_name = ty_info.var_name + "_ref",
 581                         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 + ");",
 582                         to_hu_conv_name = ty_info.var_name + "_hu_conv",
 583                         from_hu_conv = (ty_info.var_name + " == null ? 0 : " + ty_info.var_name + ".ptr & ~1", "this.ptrs_to.add(" + ty_info.var_name + ")"))
 584                 else:
 585                     return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 586                         arg_conv = opaque_arg_conv, arg_conv_name = ty_info.var_name + "_conv", arg_conv_cleanup = None,
 587                         ret_conv = (ty_info.rust_obj + " " + ty_info.var_name + "_var = ", opaque_ret_conv_suf),
 588                         ret_conv_name = ty_info.var_name + "_ref",
 589                         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 + ");",
 590                         to_hu_conv_name = ty_info.var_name + "_hu_conv",
 591                         from_hu_conv = (ty_info.var_name + " == null ? 0 : " + ty_info.var_name + ".ptr & ~1", "this.ptrs_to.add(" + ty_info.var_name + ")"))
 592
 593             if not ty_info.is_ptr:
 594                 if ty_info.rust_obj in unitary_enums:
 595                     (ret_pfx, ret_sfx) = consts.c_unitary_enum_to_native_call(ty_info)
 596                     (arg_pfx, arg_sfx) = consts.native_unitary_enum_to_c_call(ty_info)
 597                     return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 598                         arg_conv = ty_info.rust_obj + " " + ty_info.var_name + "_conv = " + arg_pfx + ty_info.var_name + arg_sfx + ";",
 599                         arg_conv_name = ty_info.var_name + "_conv",
 600                         arg_conv_cleanup = None,
 601                         ret_conv = (ty_info.c_ty + " " + ty_info.var_name + "_conv = " + ret_pfx, ret_sfx + ";"),
 602                         ret_conv_name = ty_info.var_name + "_conv", to_hu_conv = None, to_hu_conv_name = None, from_hu_conv = None)
 603                 base_conv = ty_info.rust_obj + " " + ty_info.var_name + "_conv = *(" + ty_info.rust_obj + "*)" + ty_info.var_name + ";"
 604                 if ty_info.rust_obj in trait_structs:
 605                     if not is_free:
 606                         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
 607                         if needs_full_clone and (ty_info.rust_obj.replace("LDK", "") + "_clone") in clone_fns:
 608                             base_conv = base_conv + "\n" + ty_info.var_name + "_conv = " + ty_info.rust_obj.replace("LDK", "") + "_clone(" + ty_info.var_name + ");"
 609                         else:
 610                             base_conv = base_conv + "\nif (" + ty_info.var_name + "_conv.free == " + ty_info.rust_obj + "_JCalls_free) {\n"
 611                             base_conv = base_conv + "\t// If this_arg is a JCalls struct, then we need to increment the refcnt in it.\n"
 612                             base_conv = base_conv + "\t" + ty_info.rust_obj + "_JCalls_clone(" + ty_info.var_name + "_conv.this_arg);\n}"
 613                             if needs_full_clone:
 614                                 base_conv = base_conv + "// Warning: we may need a move here but can't do a full clone!\n"
 615
 616                     else:
 617                         base_conv = base_conv + "\n" + "FREE((void*)" + ty_info.var_name + ");"
 618                     return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 619                         arg_conv = base_conv, arg_conv_name = ty_info.var_name + "_conv", arg_conv_cleanup = None,
 620                         ret_conv = (ty_info.rust_obj + "* ret = MALLOC(sizeof(" + ty_info.rust_obj + "), \"" + ty_info.rust_obj + "\");\n*ret = ", ";"),
 621                         ret_conv_name = "(long)ret",
 622                         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);",
 623                         to_hu_conv_name = "ret_hu_conv",
 624                         from_hu_conv = (ty_info.var_name + " == null ? 0 : " + ty_info.var_name + ".ptr", "this.ptrs_to.add(" + ty_info.var_name + ")"))
 625                 if ty_info.rust_obj != "LDKu8slice":
 626                     # Don't bother free'ing slices passed in - Rust doesn't auto-free the
 627                     # underlying unlike Vecs, and it gives Java more freedom.
 628                     base_conv = base_conv + "\nFREE((void*)" + ty_info.var_name + ");";
 629                 if ty_info.rust_obj in complex_enums:
 630                     ret_conv = ("long " + ty_info.var_name + "_ref = (long)&", ";")
 631                     if not holds_ref:
 632                         ret_conv = (ty_info.rust_obj + " *" + ty_info.var_name + "_copy = MALLOC(sizeof(" + ty_info.rust_obj + "), \"" + ty_info.rust_obj + "\");\n", "")
 633                         if ty_info.requires_clone == True: # Set in object array mapping
 634                             if (ty_info.rust_obj.replace("LDK", "") + "_clone") in clone_fns:
 635                                 ret_conv = (ret_conv[0] + "*" + ty_info.var_name + "_copy = " + ty_info.rust_obj.replace("LDK", "") + "_clone(&", ");\n")
 636                             else:
 637                                 ret_conv = (ret_conv[0] + "*" + ty_info.var_name + "_copy = ", "; // XXX: We likely need to clone here, but no _clone fn is available!\n")
 638                         else:
 639                             ret_conv = (ret_conv[0] + "*" + ty_info.var_name + "_copy = ", ";\n")
 640                         ret_conv = (ret_conv[0], ret_conv[1] + "long " + ty_info.var_name + "_ref = (long)" + ty_info.var_name + "_copy;")
 641                     return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 642                         arg_conv = base_conv, arg_conv_name = ty_info.var_name + "_conv", arg_conv_cleanup = None,
 643                         ret_conv = ret_conv, ret_conv_name = ty_info.var_name + "_ref",
 644                         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);",
 645                         to_hu_conv_name = ty_info.var_name + "_hu_conv", from_hu_conv = (ty_info.var_name + ".ptr", ""))
 646                 if ty_info.rust_obj in result_types:
 647                     if holds_ref:
 648                         # If we're trying to return a ref, we have to clone.
 649                         # We just blindly assume its implemented and let the compiler fail if its not.
 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                         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);")
 652                     else:
 653                         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 = ", ";")
 654                     return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 655                         arg_conv = base_conv, arg_conv_name = ty_info.var_name + "_conv", arg_conv_cleanup = None,
 656                         ret_conv = ret_conv, ret_conv_name = "(long)" + ty_info.var_name + "_conv",
 657                         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 + ");",
 658                         to_hu_conv_name = ty_info.var_name + "_hu_conv", from_hu_conv = (ty_info.var_name + " != null ? " + ty_info.var_name + ".ptr : 0", ""))
 659                 if ty_info.rust_obj in tuple_types:
 660                     from_hu_conv = "bindings." + tuple_types[ty_info.rust_obj][1].replace("LDK", "") + "_new("
 661                     to_hu_conv_pfx = ""
 662                     to_hu_conv_sfx = ty_info.java_hu_ty + " " + ty_info.var_name + "_conv = new " + ty_info.java_hu_ty + "("
 663                     clone_ret_str = ""
 664                     for idx, conv in enumerate(tuple_types[ty_info.rust_obj][0]):
 665                         if idx != 0:
 666                             to_hu_conv_sfx = to_hu_conv_sfx + ", "
 667                             from_hu_conv = from_hu_conv + ", "
 668                         conv.var_name = ty_info.var_name + "_" + chr(idx + ord("a"))
 669                         conv_map = map_type_with_info(conv, False, None, is_free, holds_ref)
 670                         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"
 671                         if conv_map.to_hu_conv is not None:
 672                             to_hu_conv_pfx = to_hu_conv_pfx + conv_map.to_hu_conv + ";\n"
 673                             to_hu_conv_sfx = to_hu_conv_sfx + conv_map.to_hu_conv_name
 674                         else:
 675                             to_hu_conv_sfx = to_hu_conv_sfx + ty_info.var_name + "_" + chr(idx + ord("a"))
 676                         if conv_map.from_hu_conv is not None:
 677                             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")))
 678                             if conv_map.from_hu_conv[1] != "":
 679                                 from_hu_conv = from_hu_conv + "/*XXX: " + conv_map.from_hu_conv[1] + "*/"
 680                         else:
 681                             from_hu_conv = from_hu_conv + ty_info.var_name + "." + chr(idx + ord("a"))
 682
 683                         if conv.is_native_primitive:
 684                             pass
 685                         elif (conv_map.rust_obj.replace("LDK", "") + "_clone") in clone_fns:
 686                             accessor = ty_info.var_name + "_ref->" + chr(idx + ord("a"))
 687                             clone_ret_str = clone_ret_str + "\n" + accessor + " = " + conv_map.rust_obj.replace("LDK", "") + "_clone(&" + accessor + ");"
 688                         else:
 689                             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
 690                     if not ty_info.is_ptr and not holds_ref:
 691                         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 = ", ";")
 692                         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:
 693                             ret_conv = (ret_conv[0], ret_conv[1] + clone_ret_str)
 694                         return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 695                             arg_conv = base_conv, arg_conv_name = ty_info.var_name + "_conv", arg_conv_cleanup = None,
 696                             ret_conv = ret_conv,
 697                             ret_conv_name = "(long)" + ty_info.var_name + "_ref",
 698                             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 + ")", ""))
 699                     return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 700                         arg_conv = base_conv, arg_conv_name = ty_info.var_name + "_conv", arg_conv_cleanup = None,
 701                         ret_conv = ("long " + ty_info.var_name + "_ref = (long)&", ";"), ret_conv_name = ty_info.var_name + "_ref",
 702                         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 + ")", ""))
 703
 704                 # The manually-defined types - TxOut and Transaction
 705                 assert ty_info.rust_obj == "LDKTxOut"
 706                 if not ty_info.is_ptr and not holds_ref:
 707                     ret_conv = ("LDKTxOut* " + ty_info.var_name + "_ref = MALLOC(sizeof(LDKTxOut), \"LDKTxOut\");\n*" + ty_info.var_name + "_ref = ", ";")
 708                 else:
 709                     ret_conv = ("long " + ty_info.var_name + "_ref = (long)&", ";")
 710                 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 711                     arg_conv = base_conv, arg_conv_name = ty_info.var_name + "_conv", arg_conv_cleanup = None,
 712                     ret_conv = ret_conv, ret_conv_name = "(long)" + ty_info.var_name + "_ref",
 713                     to_hu_conv = ty_info.java_hu_ty + " " + ty_info.var_name + "_conv = new " +ty_info.java_hu_ty + "(null, " + ty_info.var_name + ");",
 714                     to_hu_conv_name = ty_info.var_name + "_conv", from_hu_conv = (ty_info.var_name + ".ptr", ""))
 715             elif ty_info.is_ptr:
 716                 assert(not is_free)
 717                 if ty_info.rust_obj in complex_enums:
 718                     return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 719                         arg_conv = ty_info.rust_obj + "* " + ty_info.var_name + "_conv = (" + ty_info.rust_obj + "*)" + ty_info.var_name + ";",
 720                         arg_conv_name = ty_info.var_name + "_conv", arg_conv_cleanup = None,
 721                         ret_conv = ("long ret_" + ty_info.var_name + " = (long)", ";"), ret_conv_name = "ret_" + ty_info.var_name,
 722                         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 + ");",
 723                         to_hu_conv_name = ty_info.var_name + "_hu_conv",
 724                         from_hu_conv = (ty_info.var_name + " == null ? 0 : " + ty_info.var_name + ".ptr & ~1", "this.ptrs_to.add(" + ty_info.var_name + ")"))
 725                 elif ty_info.rust_obj in trait_structs:
 726                     if ty_info.rust_obj.replace("LDK", "") + "_clone" in clone_fns:
 727                         return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 728                             arg_conv = ty_info.rust_obj + "* " + ty_info.var_name + "_conv = (" + ty_info.rust_obj + "*)" + ty_info.var_name + ";",
 729                             arg_conv_name = ty_info.var_name + "_conv", arg_conv_cleanup = None,
 730                             ret_conv = (ty_info.rust_obj + " *" + ty_info.var_name + "_clone = MALLOC(sizeof(" + ty_info.rust_obj + "), \"" + ty_info.rust_obj + "\");\n" +
 731                                 "*" + ty_info.var_name + "_clone = " + ty_info.rust_obj.replace("LDK", "") + "_clone(", ");"),
 732                             ret_conv_name = "(long)" + ty_info.var_name + "_clone",
 733                             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);",
 734                             to_hu_conv_name = "ret_hu_conv",
 735                             from_hu_conv = (ty_info.var_name + " == null ? 0 : " + ty_info.var_name + ".ptr", "this.ptrs_to.add(" + ty_info.var_name + ")"))
 736                     else:
 737                         return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 738                             arg_conv = ty_info.rust_obj + "* " + ty_info.var_name + "_conv = (" + ty_info.rust_obj + "*)" + ty_info.var_name + ";",
 739                             arg_conv_name = ty_info.var_name + "_conv", arg_conv_cleanup = None,
 740                             ret_conv = ("long ret_" + ty_info.var_name + " = (long)", ";"), ret_conv_name = "ret_" + ty_info.var_name,
 741                             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);",
 742                             to_hu_conv_name = "ret_hu_conv",
 743                             from_hu_conv = (ty_info.var_name + " == null ? 0 : " + ty_info.var_name + ".ptr", "this.ptrs_to.add(" + ty_info.var_name + ")"))
 744                 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 745                     arg_conv = ty_info.rust_obj + "* " + ty_info.var_name + "_conv = (" + ty_info.rust_obj + "*)" + ty_info.var_name + ";",
 746                     arg_conv_name = ty_info.var_name + "_conv", arg_conv_cleanup = None,
 747                     ret_conv = ("long ret_" + ty_info.var_name + " = (long)", ";"), ret_conv_name = "ret_" + ty_info.var_name,
 748                     to_hu_conv = "TODO 3", to_hu_conv_name = None, from_hu_conv = None) # its a pointer, no conv needed
 749             assert False # We should have handled every case by now.
 750
 751     def map_fn(line, re_match, ret_arr_len, c_call_string):
 752         out_java.write("\t// " + line)
 753         out_java.write("\tpublic static native ")
 754         write_c(consts.c_fn_ty_pfx)
 755
 756         is_free = re_match.group(2).endswith("_free")
 757         struct_meth = re_match.group(2).split("_")[0]
 758
 759         ret_info = map_type(re_match.group(1), True, ret_arr_len, False, False)
 760         write_c(ret_info.c_ty)
 761         out_java.write(ret_info.java_ty)
 762
 763         if ret_info.ret_conv is not None:
 764             ret_conv_pfx, ret_conv_sfx = ret_info.ret_conv
 765
 766         out_java.write(" " + re_match.group(2) + "(")
 767         write_c(" " + consts.c_fn_name_pfx + re_match.group(2).replace('_', '_1') + "(" + consts.c_fn_args_pfx)
 768
 769         arg_names = []
 770         default_constructor_args = {}
 771         takes_self = False
 772         args_known = True
 773         for idx, arg in enumerate(re_match.group(3).split(',')):
 774             if idx != 0:
 775                 out_java.write(", ")
 776             if arg != "void":
 777                 write_c(", ")
 778             arg_conv_info = map_type(arg, False, None, is_free, True)
 779             if arg_conv_info.c_ty != "void":
 780                 write_c(arg_conv_info.c_ty + " " + arg_conv_info.arg_name)
 781                 out_java.write(arg_conv_info.java_ty + " " + arg_conv_info.arg_name)
 782             if idx == 0 and arg_conv_info.java_hu_ty == struct_meth:
 783                 takes_self = True
 784             if arg_conv_info.arg_conv is not None and "Warning" in arg_conv_info.arg_conv:
 785                 if arg_conv_info.rust_obj in constructor_fns:
 786                     assert not is_free
 787                     for explode_arg in constructor_fns[arg_conv_info.rust_obj].split(','):
 788                         explode_arg_conv = map_type(explode_arg, False, None, False, True)
 789                         if explode_arg_conv.c_ty == "void":
 790                             # We actually want to handle this case, but for now its only used in NetGraphMsgHandler::new()
 791                             # which ends up resulting in a redundant constructor - both without arguments for the NetworkGraph.
 792                             args_known = False
 793                             pass
 794                         if not arg_conv_info.arg_name in default_constructor_args:
 795                             default_constructor_args[arg_conv_info.arg_name] = []
 796                         default_constructor_args[arg_conv_info.arg_name].append(explode_arg_conv)
 797             arg_names.append(arg_conv_info)
 798
 799         out_java_struct = None
 800         if ("LDK" + struct_meth in opaque_structs or "LDK" + struct_meth in trait_structs) and not is_free:
 801             out_java_struct = open(f"{sys.argv[3]}/structs/{struct_meth}{consts.file_ext}", "a")
 802             if not args_known:
 803                 out_java_struct.write("\t// Skipped " + re_match.group(2) + "\n")
 804                 out_java_struct.close()
 805                 out_java_struct = None
 806             else:
 807                 meth_n = re_match.group(2)[len(struct_meth) + 1:]
 808                 if not takes_self:
 809                     out_java_struct.write("\tpublic static " + ret_info.java_hu_ty + " constructor_" + meth_n + "(")
 810                 else:
 811                     out_java_struct.write("\tpublic " + ret_info.java_hu_ty + " " + meth_n + "(")
 812                 for idx, arg in enumerate(arg_names):
 813                     if idx != 0:
 814                         if not takes_self or idx > 1:
 815                             out_java_struct.write(", ")
 816                     elif takes_self:
 817                         continue
 818                     if arg.java_ty != "void":
 819                         if arg.arg_name in default_constructor_args:
 820                             for explode_idx, explode_arg in enumerate(default_constructor_args[arg.arg_name]):
 821                                 if explode_idx != 0:
 822                                     out_java_struct.write(", ")
 823                                 out_java_struct.write(explode_arg.java_hu_ty + " " + arg.arg_name + "_" + explode_arg.arg_name)
 824                         else:
 825                             out_java_struct.write(arg.java_hu_ty + " " + arg.arg_name)
 826
 827
 828         out_java.write(");\n")
 829         write_c(") {\n")
 830         if out_java_struct is not None:
 831             out_java_struct.write(") {\n")
 832
 833         for info in arg_names:
 834             if info.arg_conv is not None:
 835                 write_c("\t" + info.arg_conv.replace('\n', "\n\t") + "\n")
 836
 837         if ret_info.ret_conv is not None:
 838             write_c("\t" + ret_conv_pfx.replace('\n', '\n\t'))
 839         elif ret_info.c_ty != "void":
 840             write_c("\t" + ret_info.c_ty + " ret_val = ")
 841         else:
 842             write_c("\t")
 843
 844         if c_call_string is None:
 845             write_c(re_match.group(2) + "(")
 846         else:
 847             write_c(c_call_string)
 848         for idx, info in enumerate(arg_names):
 849             if info.arg_conv_name is not None:
 850                 if idx != 0:
 851                     write_c(", ")
 852                 elif c_call_string is not None:
 853                     continue
 854                 write_c(info.arg_conv_name)
 855         write_c(")")
 856         if ret_info.ret_conv is not None:
 857             write_c(ret_conv_sfx.replace('\n', '\n\t'))
 858         else:
 859             write_c(";")
 860         for info in arg_names:
 861             if info.arg_conv_cleanup is not None:
 862                 write_c("\n\t" + info.arg_conv_cleanup.replace("\n", "\n\t"))
 863         if ret_info.ret_conv is not None:
 864             write_c("\n\treturn " + ret_info.ret_conv_name + ";")
 865         elif ret_info.c_ty != "void":
 866             write_c("\n\treturn ret_val;")
 867         write_c("\n}\n\n")
 868         if out_java_struct is not None:
 869             out_java_struct.write("\t\t")
 870             if ret_info.java_ty != "void":
 871                 out_java_struct.write(ret_info.java_ty + " ret = ")
 872             out_java_struct.write("bindings." + re_match.group(2) + "(")
 873             for idx, info in enumerate(arg_names):
 874                 if idx != 0:
 875                     out_java_struct.write(", ")
 876                 if idx == 0 and takes_self:
 877                     out_java_struct.write("this.ptr")
 878                 elif info.arg_name in default_constructor_args:
 879                     out_java_struct.write("bindings." + info.java_hu_ty + "_new(")
 880                     for explode_idx, explode_arg in enumerate(default_constructor_args[info.arg_name]):
 881                         if explode_idx != 0:
 882                             out_java_struct.write(", ")
 883                         expl_arg_name = info.arg_name + "_" + explode_arg.arg_name
 884                         if explode_arg.from_hu_conv is not None:
 885                             out_java_struct.write(explode_arg.from_hu_conv[0].replace(explode_arg.arg_name, expl_arg_name))
 886                         else:
 887                             out_java_struct.write(expl_arg_name)
 888                     out_java_struct.write(")")
 889                 elif info.from_hu_conv is not None:
 890                     out_java_struct.write(info.from_hu_conv[0])
 891                 else:
 892                     out_java_struct.write(info.arg_name)
 893             out_java_struct.write(");\n")
 894             if ret_info.to_hu_conv is not None:
 895                 if not takes_self:
 896                     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")
 897                 else:
 898                     out_java_struct.write("\t\t" + ret_info.to_hu_conv.replace("\n", "\n\t\t") + "\n")
 899
 900             for idx, info in enumerate(arg_names):
 901                 if idx == 0 and takes_self:
 902                     pass
 903                 elif info.arg_name in default_constructor_args:
 904                     for explode_arg in default_constructor_args[info.arg_name]:
 905                         expl_arg_name = info.arg_name + "_" + explode_arg.arg_name
 906                         if explode_arg.from_hu_conv is not None and ret_info.to_hu_conv_name:
 907                             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")
 908                 elif info.from_hu_conv is not None and info.from_hu_conv[1] != "":
 909                     if not takes_self and ret_info.to_hu_conv_name is not None:
 910                         out_java_struct.write("\t\t" + info.from_hu_conv[1].replace("this", ret_info.to_hu_conv_name) + ";\n")
 911                     else:
 912                         out_java_struct.write("\t\t" + info.from_hu_conv[1] + ";\n")
 913
 914             if ret_info.to_hu_conv_name is not None:
 915                 out_java_struct.write("\t\treturn " + ret_info.to_hu_conv_name + ";\n")
 916             elif ret_info.java_ty != "void" and ret_info.rust_obj != "LDK" + struct_meth:
 917                 out_java_struct.write("\t\treturn ret;\n")
 918             out_java_struct.write("\t}\n\n")
 919             out_java_struct.close()
 920
 921     def map_unitary_enum(struct_name, field_lines):
 922         with open(f"{sys.argv[3]}/enums/{struct_name}{consts.file_ext}", "w") as out_java_enum:
 923             unitary_enums.add(struct_name)
 924             for idx, struct_line in enumerate(field_lines):
 925                 if idx == 0:
 926                     assert(struct_line == "typedef enum %s {" % struct_name)
 927                 elif idx == len(field_lines) - 3:
 928                     assert(struct_line.endswith("_Sentinel,"))
 929                 elif idx == len(field_lines) - 2:
 930                     assert(struct_line == "} %s;" % struct_name)
 931                 elif idx == len(field_lines) - 1:
 932                     assert(struct_line == "")
 933             (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]])
 934             write_c(c_out)
 935             out_java_enum.write(native_file_out)
 936             out_java.write(native_out)
 937
 938     def map_complex_enum(struct_name, union_enum_items):
 939         java_hu_type = struct_name.replace("LDK", "")
 940         complex_enums.add(struct_name)
 941
 942         enum_variants = []
 943         tag_field_lines = union_enum_items["field_lines"]
 944         for idx, struct_line in enumerate(tag_field_lines):
 945             if idx == 0:
 946                 assert(struct_line == "typedef enum %s_Tag {" % struct_name)
 947             elif idx == len(tag_field_lines) - 3:
 948                 assert(struct_line.endswith("_Sentinel,"))
 949             elif idx == len(tag_field_lines) - 2:
 950                 assert(struct_line == "} %s_Tag;" % struct_name)
 951             elif idx == len(tag_field_lines) - 1:
 952                 assert(struct_line == "")
 953             else:
 954                 variant_name = struct_line.strip(' ,')[len(struct_name) + 1:]
 955                 fields = []
 956                 if "LDK" + variant_name in union_enum_items:
 957                     enum_var_lines = union_enum_items["LDK" + variant_name]
 958                     for idx, field in enumerate(enum_var_lines):
 959                         if idx != 0 and idx < len(enum_var_lines) - 2:
 960                             fields.append(map_type(field.strip(' ;'), False, None, False, True))
 961                         else:
 962                             # TODO: Assert line format
 963                             pass
 964                 else:
 965                     # TODO: Assert line format
 966                     pass
 967                 enum_variants.append(ComplexEnumVariantInfo(variant_name, fields))
 968
 969         with open(f"{sys.argv[3]}/structs/{java_hu_type}{consts.file_ext}", "w") as out_java_enum:
 970             (out_java_addendum, out_java_enum_addendum, out_c_addendum) = consts.map_complex_enum(struct_name, enum_variants, camel_to_snake)
 971
 972             out_java_enum.write(out_java_enum_addendum)
 973             out_java.write(out_java_addendum)
 974             write_c(out_c_addendum)
 975
 976     def map_trait(struct_name, field_var_lines, trait_fn_lines):
 977         with open(f"{sys.argv[3]}/structs/{struct_name.replace('LDK', '')}{consts.file_ext}", "w") as out_java_trait:
 978             field_var_convs = []
 979             for var_line in field_var_lines:
 980                 if var_line.group(1) in trait_structs:
 981                     field_var_convs.append((var_line.group(1), var_line.group(2)))
 982                 else:
 983                     field_var_convs.append(map_type(var_line.group(1) + " " + var_line.group(2), False, None, False, False))
 984
 985             field_fns = []
 986             for fn_line in trait_fn_lines:
 987                 ret_ty_info = map_type(fn_line.group(2), True, None, False, False)
 988                 is_const = fn_line.group(4) is not None
 989
 990                 arg_tys = []
 991                 for idx, arg in enumerate(fn_line.group(5).split(',')):
 992                     if arg == "":
 993                         continue
 994                     arg_conv_info = map_type(arg, True, None, False, False)
 995                     arg_tys.append(arg_conv_info)
 996                 field_fns.append(TraitMethInfo(fn_line.group(3), is_const, ret_ty_info, arg_tys))
 997
 998             (out_java_addendum, out_java_trait_addendum, out_c_addendum) = consts.native_c_map_trait(struct_name, field_var_convs, field_fns)
 999             write_c(out_c_addendum)
1000             out_java_trait.write(out_java_trait_addendum)
1001             out_java.write(out_java_addendum)
1002
1003         for fn_line in trait_fn_lines:
1004             # For now, just disable enabling the _call_log - we don't know how to inverse-map String
1005             is_log = fn_line.group(3) == "log" and struct_name == "LDKLogger"
1006             if fn_line.group(3) != "free" and fn_line.group(3) != "clone" and fn_line.group(3) != "eq" and not is_log:
1007                 dummy_line = fn_line.group(2) + struct_name.replace("LDK", "") + "_" + fn_line.group(3) + " " + struct_name + "* this_arg" + fn_line.group(5) + "\n"
1008                 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")
1009         for idx, var_line in enumerate(field_var_lines):
1010             if var_line.group(1) not in trait_structs:
1011                 write_c(var_line.group(1) + " " + struct_name + "_set_get_" + var_line.group(2) + "(" + struct_name + "* this_arg) {\n")
1012                 write_c("\tif (this_arg->set_" + var_line.group(2) + " != NULL)\n")
1013                 write_c("\t\tthis_arg->set_" + var_line.group(2) + "(this_arg);\n")
1014                 write_c("\treturn this_arg->" + var_line.group(2) + ";\n")
1015                 write_c("}\n")
1016                 dummy_line = var_line.group(1) + " " + struct_name.replace("LDK", "") + "_get_" + var_line.group(2) + " " + struct_name + "* this_arg" + fn_line.group(5) + "\n"
1017                 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")
1018
1019     def map_result(struct_name, res_ty, err_ty):
1020         result_types.add(struct_name)
1021         human_ty = struct_name.replace("LDKCResult", "Result")
1022         with open(f"{sys.argv[3]}/structs/{human_ty}{consts.file_ext}", "w") as out_java_struct:
1023             out_java_struct.write(consts.hu_struct_file_prefix)
1024             out_java_struct.write("public class " + human_ty + " extends CommonBase {\n")
1025             out_java_struct.write("\tprivate " + human_ty + "(Object _dummy, long ptr) { super(ptr); }\n")
1026             out_java_struct.write("\tprotected void finalize() throws Throwable {\n")
1027             out_java_struct.write("\t\tif (ptr != 0) { bindings." + struct_name.replace("LDK","") + "_free(ptr); } super.finalize();\n")
1028             out_java_struct.write("\t}\n\n")
1029             out_java_struct.write("\tstatic " + human_ty + " constr_from_ptr(long ptr) {\n")
1030             out_java_struct.write("\t\tif (bindings." + struct_name + "_result_ok(ptr)) {\n")
1031             out_java_struct.write("\t\t\treturn new " + human_ty + "_OK(null, ptr);\n")
1032             out_java_struct.write("\t\t} else {\n")
1033             out_java_struct.write("\t\t\treturn new " + human_ty + "_Err(null, ptr);\n")
1034             out_java_struct.write("\t\t}\n")
1035             out_java_struct.write("\t}\n")
1036
1037             res_map = map_type(res_ty + " res", True, None, False, True)
1038             err_map = map_type(err_ty + " err", True, None, False, True)
1039             can_clone = True
1040             if not res_map.is_native_primitive and (res_map.rust_obj.replace("LDK", "") + "_clone" not in clone_fns):
1041                 can_clone = False
1042             if not err_map.is_native_primitive and (err_map.rust_obj.replace("LDK", "") + "_clone" not in clone_fns):
1043                 can_clone = False
1044
1045             out_java.write("\tpublic static native boolean " + struct_name + "_result_ok(long arg);\n")
1046             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")
1047             write_c("\treturn ((" + struct_name + "*)arg)->result_ok;\n")
1048             write_c("}\n")
1049
1050             out_java.write("\tpublic static native " + res_map.java_ty + " " + struct_name + "_get_ok(long arg);\n")
1051             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")
1052             write_c("\t" + struct_name + " *val = (" + struct_name + "*)arg;\n")
1053             write_c("\tCHECK(val->result_ok);\n\t")
1054             out_java_struct.write("\tpublic static final class " + human_ty + "_OK extends " + human_ty + " {\n")
1055             if res_map.ret_conv is not None:
1056                 write_c(res_map.ret_conv[0].replace("\n", "\n\t") + "(*val->contents.result)")
1057                 write_c(res_map.ret_conv[1].replace("\n", "\n\t") + "\n\treturn " + res_map.ret_conv_name)
1058             else:
1059                 write_c("return *val->contents.result")
1060             write_c(";\n}\n")
1061
1062             if res_map.java_hu_ty != "void":
1063                 out_java_struct.write("\t\tpublic final " + res_map.java_hu_ty + " res;\n")
1064             out_java_struct.write("\t\tprivate " + human_ty + "_OK(Object _dummy, long ptr) {\n")
1065             out_java_struct.write("\t\t\tsuper(_dummy, ptr);\n")
1066             if res_map.java_hu_ty == "void":
1067                 pass
1068             elif res_map.to_hu_conv is not None:
1069                 out_java_struct.write("\t\t\t" + res_map.java_ty + " res = bindings." + struct_name + "_get_ok(ptr);\n")
1070                 out_java_struct.write("\t\t\t" + res_map.to_hu_conv.replace("\n", "\n\t\t\t"))
1071                 out_java_struct.write("\n\t\t\tthis.res = " + res_map.to_hu_conv_name + ";\n")
1072             else:
1073                 out_java_struct.write("\t\t\tthis.res = bindings." + struct_name + "_get_ok(ptr);\n")
1074             out_java_struct.write("\t\t}\n")
1075             if struct_name.startswith("LDKCResult_None"):
1076                 out_java_struct.write("\t\tpublic " + human_ty + "_OK() {\n\t\t\tthis(null, bindings.C" + human_ty + "_ok());\n")
1077             else:
1078                 out_java_struct.write("\t\tpublic " + human_ty + "_OK(" + res_map.java_hu_ty + " res) {\n")
1079                 if res_map.from_hu_conv is not None:
1080                     out_java_struct.write("\t\t\tthis(null, bindings.C" + human_ty + "_ok(" + res_map.from_hu_conv[0] + "));\n")
1081                     if res_map.from_hu_conv[1] != "":
1082                         out_java_struct.write("\t\t\t" + res_map.from_hu_conv[1] + ";\n")
1083                 else:
1084                     out_java_struct.write("\t\t\tthis(null, bindings.C" + human_ty + "_ok(res));\n")
1085             out_java_struct.write("\t\t}\n\t}\n\n")
1086
1087             out_java.write("\tpublic static native " + err_map.java_ty + " " + struct_name + "_get_err(long arg);\n")
1088             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")
1089             write_c("\t" + struct_name + " *val = (" + struct_name + "*)arg;\n")
1090             write_c("\tCHECK(!val->result_ok);\n\t")
1091             out_java_struct.write("\tpublic static final class " + human_ty + "_Err extends " + human_ty + " {\n")
1092             if err_map.ret_conv is not None:
1093                 write_c(err_map.ret_conv[0].replace("\n", "\n\t") + "(*val->contents.err)")
1094                 write_c(err_map.ret_conv[1].replace("\n", "\n\t") + "\n\treturn " + err_map.ret_conv_name)
1095             else:
1096                 write_c("return *val->contents.err")
1097             write_c(";\n}\n")
1098
1099             if err_map.java_hu_ty != "void":
1100                 out_java_struct.write("\t\tpublic final " + err_map.java_hu_ty + " err;\n")
1101             out_java_struct.write("\t\tprivate " + human_ty + "_Err(Object _dummy, long ptr) {\n")
1102             out_java_struct.write("\t\t\tsuper(_dummy, ptr);\n")
1103             if err_map.java_hu_ty == "void":
1104                 pass
1105             elif err_map.to_hu_conv is not None:
1106                 out_java_struct.write("\t\t\t" + err_map.java_ty + " err = bindings." + struct_name + "_get_err(ptr);\n")
1107                 out_java_struct.write("\t\t\t" + err_map.to_hu_conv.replace("\n", "\n\t\t\t"))
1108                 out_java_struct.write("\n\t\t\tthis.err = " + err_map.to_hu_conv_name + ";\n")
1109             else:
1110                 out_java_struct.write("\t\t\tthis.err = bindings." + struct_name + "_get_err(ptr);\n")
1111             out_java_struct.write("\t\t}\n")
1112
1113             if struct_name.endswith("NoneZ"):
1114                 out_java_struct.write("\t\tpublic " + human_ty + "_Err() {\n\t\t\tthis(null, bindings.C" + human_ty + "_err());\n")
1115             else:
1116                 out_java_struct.write("\t\tpublic " + human_ty + "_Err(" + err_map.java_hu_ty + " err) {\n")
1117                 if err_map.from_hu_conv is not None:
1118                     out_java_struct.write("\t\t\tthis(null, bindings.C" + human_ty + "_err(" + err_map.from_hu_conv[0] + "));\n")
1119                     if err_map.from_hu_conv[1] != "":
1120                         out_java_struct.write("\t\t\t" + err_map.from_hu_conv[1] + ";\n")
1121                 else:
1122                     out_java_struct.write("\t\t\tthis(null, bindings.C" + human_ty + "_err(err));\n")
1123             out_java_struct.write("\t\t}\n\t}\n}\n")
1124
1125             if can_clone:
1126                 clone_fns.add(struct_name.replace("LDK", "") + "_clone")
1127                 write_c("static inline " + struct_name + " " + struct_name.replace("LDK", "") + "_clone(const " + struct_name + " *orig) {\n")
1128                 write_c("\t" + struct_name + " res = { .result_ok = orig->result_ok };\n")
1129                 write_c("\tif (orig->result_ok) {\n")
1130                 if res_map.c_ty == "void":
1131                     write_c("\t\tres.contents.result = NULL;\n")
1132                 else:
1133                     if res_map.is_native_primitive:
1134                         write_c("\t\t" + res_map.c_ty + "* contents = MALLOC(sizeof(" + res_map.c_ty + "), \"" + res_map.c_ty + " result OK clone\");\n")
1135                         write_c("\t\t*contents = *orig->contents.result;\n")
1136                     else:
1137                         write_c("\t\t" + res_map.rust_obj + "* contents = MALLOC(sizeof(" + res_map.rust_obj + "), \"" + res_map.rust_obj + " result OK clone\");\n")
1138                         write_c("\t\t*contents = " + res_map.rust_obj.replace("LDK", "") + "_clone(orig->contents.result);\n")
1139                     write_c("\t\tres.contents.result = contents;\n")
1140                 write_c("\t} else {\n")
1141                 if err_map.c_ty == "void":
1142                     write_c("\t\tres.contents.err = NULL;\n")
1143                 else:
1144                     if err_map.is_native_primitive:
1145                         write_c("\t\t" + err_map.c_ty + "* contents = MALLOC(sizeof(" + err_map.c_ty + "), \"" + err_map.c_ty + " result Err clone\");\n")
1146                         write_c("\t\t*contents = *orig->contents.err;\n")
1147                     else:
1148                         write_c("\t\t" + err_map.rust_obj + "* contents = MALLOC(sizeof(" + err_map.rust_obj + "), \"" + err_map.rust_obj + " result Err clone\");\n")
1149                         write_c("\t\t*contents = " + err_map.rust_obj.replace("LDK", "") + "_clone(orig->contents.err);\n")
1150                     write_c("\t\tres.contents.err = contents;\n")
1151                 write_c("\t}\n\treturn res;\n}\n")
1152
1153     def map_tuple(struct_name, field_lines):
1154         out_java.write("\tpublic static native long " + struct_name + "_new(")
1155         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)
1156         ty_list = []
1157         for idx, line in enumerate(field_lines):
1158             if idx != 0 and idx < len(field_lines) - 2:
1159                 ty_info = java_c_types(line.strip(';'), None)
1160                 if idx != 1:
1161                     out_java.write(", ")
1162                 e = chr(ord('a') + idx - 1)
1163                 out_java.write(ty_info.java_ty + " " + e)
1164                 write_c(", " + ty_info.c_ty + " " + e)
1165                 ty_list.append(ty_info)
1166         tuple_types[struct_name] = (ty_list, struct_name)
1167         out_java.write(");\n")
1168         write_c(") {\n")
1169         write_c("\t" + struct_name + "* ret = MALLOC(sizeof(" + struct_name + "), \"" + struct_name + "\");\n")
1170         can_clone = True
1171         clone_str = "static inline " + struct_name + " " + struct_name.replace("LDK", "") + "_clone(const " + struct_name + " *orig) {\n"
1172         clone_str = clone_str + "\t" + struct_name + " ret = {\n"
1173         for idx, line in enumerate(field_lines):
1174             if idx != 0 and idx < len(field_lines) - 2:
1175                 ty_info = map_type(line.strip(';'), False, None, False, False)
1176                 e = chr(ord('a') + idx - 1)
1177                 if ty_info.arg_conv is not None:
1178                     write_c("\t" + ty_info.arg_conv.replace("\n", "\n\t"))
1179                     write_c("\n\tret->" + e + " = " + ty_info.arg_conv_name + ";\n")
1180                 else:
1181                     write_c("\tret->" + e + " = " + e + ";\n")
1182                 if ty_info.arg_conv_cleanup is not None:
1183                     write_c("\t//TODO: Really need to call " + ty_info.arg_conv_cleanup + " here\n")
1184                 if not ty_info.is_native_primitive and (ty_info.rust_obj.replace("LDK", "") + "_clone") not in clone_fns:
1185                     can_clone = False
1186                 elif can_clone and ty_info.is_native_primitive:
1187                     clone_str = clone_str + "\t\t." + chr(ord('a') + idx - 1) + " = orig->" + chr(ord('a') + idx - 1) + ",\n"
1188                 elif can_clone:
1189                     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"
1190         write_c("\treturn (long)ret;\n")
1191         write_c("}\n")
1192
1193         if can_clone:
1194             clone_fns.add(struct_name.replace("LDK", "") + "_clone")
1195             write_c(clone_str)
1196             write_c("\t};\n\treturn ret;\n}\n")
1197
1198         for idx, ty_info in enumerate(ty_list):
1199             e = chr(ord('a') + idx)
1200             out_java.write("\tpublic static native " + ty_info.java_ty + " " + struct_name + "_get_" + e + "(long ptr);\n")
1201             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")
1202             write_c("\t" + struct_name + " *tuple = (" + struct_name + "*)ptr;\n")
1203             conv_info = map_type_with_info(ty_info, False, None, False, True)
1204             if conv_info.ret_conv is not None:
1205                 write_c("\t" + conv_info.ret_conv[0].replace("\n", "\n\t") + "tuple->" + e + conv_info.ret_conv[1].replace("\n", "\n\t") + "\n")
1206                 write_c("\treturn " + conv_info.ret_conv_name + ";\n")
1207             else:
1208                 write_c("\treturn tuple->" + e + ";\n")
1209             write_c("}\n")
1210
1211     out_java.write("""package org.ldk.impl;
1212 import org.ldk.enums.*;
1213
1214 public class bindings {
1215         public static class VecOrSliceDef {
1216                 public long dataptr;
1217                 public long datalen;
1218                 public long stride;
1219                 public VecOrSliceDef(long dataptr, long datalen, long stride) {
1220                         this.dataptr = dataptr; this.datalen = datalen; this.stride = stride;
1221                 }
1222         }
1223         static {
1224                 System.loadLibrary(\"lightningjni\");
1225                 init(java.lang.Enum.class, VecOrSliceDef.class);
1226                 init_class_cache();
1227         }
1228         static native void init(java.lang.Class c, java.lang.Class slicedef);
1229         static native void init_class_cache();
1230
1231         public static native boolean deref_bool(long ptr);
1232         public static native long deref_long(long ptr);
1233         public static native void free_heap_ptr(long ptr);
1234         public static native byte[] read_bytes(long ptr, long len);
1235         public static native byte[] get_u8_slice_bytes(long slice_ptr);
1236         public static native long bytes_to_u8_vec(byte[] bytes);
1237         public static native long new_txpointer_copy_data(byte[] txdata);
1238         public static native void txpointer_free(long ptr);
1239         public static native byte[] txpointer_get_buffer(long ptr);
1240         public static native long vec_slice_len(long vec);
1241         public static native long new_empty_slice_vec();
1242
1243 """)
1244
1245     with open(f"{sys.argv[3]}/structs/CommonBase{consts.file_ext}", "w") as out_java_struct:
1246         out_java_struct.write(consts.common_base)
1247
1248     in_block_comment = False
1249     cur_block_obj = None
1250
1251     const_val_regex = re.compile("^extern const ([A-Za-z_0-9]*) ([A-Za-z_0-9]*);$")
1252
1253     line_indicates_result_regex = re.compile("^   union (LDKCResult_[A-Za-z_0-9]*Ptr) contents;$")
1254     line_indicates_vec_regex = re.compile("^   (struct |enum |union )?([A-Za-z_0-9]*) \*data;$")
1255     line_indicates_opaque_regex = re.compile("^   bool is_owned;$")
1256     line_indicates_trait_regex = re.compile("^   (struct |enum |union )?([A-Za-z_0-9]* \*?)\(\*([A-Za-z_0-9]*)\)\((const )?void \*this_arg(.*)\);$")
1257     assert(line_indicates_trait_regex.match("   uintptr_t (*send_data)(void *this_arg, LDKu8slice data, bool resume_read);"))
1258     assert(line_indicates_trait_regex.match("   struct LDKCVec_MessageSendEventZ (*get_and_clear_pending_msg_events)(const void *this_arg);"))
1259     assert(line_indicates_trait_regex.match("   void *(*clone)(const void *this_arg);"))
1260     assert(line_indicates_trait_regex.match("   struct LDKCVec_u8Z (*write)(const void *this_arg);"))
1261     line_field_var_regex = re.compile("^   struct ([A-Za-z_0-9]*) ([A-Za-z_0-9]*);$")
1262     assert(line_field_var_regex.match("   struct LDKMessageSendEventsProvider MessageSendEventsProvider;"))
1263     assert(line_field_var_regex.match("   struct LDKChannelPublicKeys pubkeys;"))
1264     struct_name_regex = re.compile("^typedef (struct|enum|union) (MUST_USE_STRUCT )?(LDK[A-Za-z_0-9]*) {$")
1265     assert(struct_name_regex.match("typedef struct LDKCVec_u8Z {"))
1266     assert(struct_name_regex.match("typedef enum LDKNetwork {"))
1267
1268     union_enum_items = {}
1269     result_ptr_struct_items = {}
1270     for line in in_h:
1271         if in_block_comment:
1272             if line.endswith("*/\n"):
1273                 in_block_comment = False
1274         elif cur_block_obj is not None:
1275             cur_block_obj  = cur_block_obj + line
1276             if line.startswith("} "):
1277                 field_lines = []
1278                 struct_name = None
1279                 vec_ty = None
1280                 obj_lines = cur_block_obj.split("\n")
1281                 is_opaque = False
1282                 result_contents = None
1283                 is_unitary_enum = False
1284                 is_union_enum = False
1285                 is_union = False
1286                 is_tuple = False
1287                 trait_fn_lines = []
1288                 field_var_lines = []
1289
1290                 for idx, struct_line in enumerate(obj_lines):
1291                     if struct_line.strip().startswith("/*"):
1292                         in_block_comment = True
1293                     if in_block_comment:
1294                         if struct_line.endswith("*/"):
1295                             in_block_comment = False
1296                     else:
1297                         struct_name_match = struct_name_regex.match(struct_line)
1298                         if struct_name_match is not None:
1299                             struct_name = struct_name_match.group(3)
1300                             if struct_name_match.group(1) == "enum":
1301                                 if not struct_name.endswith("_Tag"):
1302                                     is_unitary_enum = True
1303                                 else:
1304                                     is_union_enum = True
1305                             elif struct_name_match.group(1) == "union":
1306                                 is_union = True
1307                         if line_indicates_opaque_regex.match(struct_line):
1308                             is_opaque = True
1309                         result_match = line_indicates_result_regex.match(struct_line)
1310                         if result_match is not None:
1311                             result_contents = result_match.group(1)
1312                         vec_ty_match = line_indicates_vec_regex.match(struct_line)
1313                         if vec_ty_match is not None and struct_name.startswith("LDKCVec_"):
1314                             vec_ty = vec_ty_match.group(2)
1315                         elif struct_name.startswith("LDKC2Tuple_") or struct_name.startswith("LDKC3Tuple_"):
1316                             is_tuple = True
1317                         trait_fn_match = line_indicates_trait_regex.match(struct_line)
1318                         if trait_fn_match is not None:
1319                             trait_fn_lines.append(trait_fn_match)
1320                         field_var_match = line_field_var_regex.match(struct_line)
1321                         if field_var_match is not None:
1322                             field_var_lines.append(field_var_match)
1323                         field_lines.append(struct_line)
1324
1325                 assert(struct_name is not None)
1326                 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))
1327                 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))
1328                 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))
1329                 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))
1330                 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))
1331                 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))
1332                 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))
1333
1334                 if is_opaque:
1335                     opaque_structs.add(struct_name)
1336                     with open(f"{sys.argv[3]}/structs/{struct_name.replace('LDK', '')}{consts.file_ext}", "w") as out_java_struct:
1337                         out_java_struct.write(consts.hu_struct_file_prefix)
1338                         out_java_struct.write("public class " + struct_name.replace("LDK","") + " extends CommonBase")
1339                         if struct_name.startswith("LDKLocked"):
1340                             out_java_struct.write(" implements AutoCloseable")
1341                         out_java_struct.write(" {\n")
1342                         out_java_struct.write("\t" + struct_name.replace("LDK", "") + "(Object _dummy, long ptr) { super(ptr); }\n")
1343                         if struct_name.startswith("LDKLocked"):
1344                             out_java_struct.write("\t@Override public void close() {\n")
1345                         else:
1346                             out_java_struct.write("\t@Override @SuppressWarnings(\"deprecation\")\n")
1347                             out_java_struct.write("\tprotected void finalize() throws Throwable {\n")
1348                             out_java_struct.write("\t\tsuper.finalize();\n")
1349                         out_java_struct.write("\t\tif (ptr != 0) { bindings." + struct_name.replace("LDK","") + "_free(ptr); }\n")
1350                         out_java_struct.write("\t}\n\n")
1351                 elif result_contents is not None:
1352                     assert result_contents in result_ptr_struct_items
1353                     res_ty, err_ty = result_ptr_struct_items[result_contents]
1354                     map_result(struct_name, res_ty, err_ty)
1355                 elif struct_name.startswith("LDKCResult_") and struct_name.endswith("ZPtr"):
1356                     for line in field_lines:
1357                         if line.endswith("*result;"):
1358                             res_ty = line[:-8].strip()
1359                         elif line.endswith("*err;"):
1360                             err_ty = line[:-5].strip()
1361                     result_ptr_struct_items[struct_name] = (res_ty, err_ty)
1362                     result_types.add(struct_name[:-3])
1363                 elif is_tuple:
1364                     map_tuple(struct_name, field_lines)
1365                 elif vec_ty is not None:
1366                     ty_info = map_type(vec_ty + " arr_elem", False, None, False, False)
1367                     if len(ty_info.java_fn_ty_arg) == 1: # ie we're a primitive of some form
1368                         out_java.write("\tpublic static native long " + struct_name + "_new(" + ty_info.java_ty + "[] elems);\n")
1369                         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")
1370                         write_c("\t" + struct_name + " *ret = MALLOC(sizeof(" + struct_name + "), \"" + struct_name + "\");\n")
1371                         write_c("\tret->datalen = " + consts.get_native_arr_len_call[0] + "elems" + consts.get_native_arr_len_call[1] + ";\n")
1372                         write_c("\tif (ret->datalen == 0) {\n")
1373                         write_c("\t\tret->data = NULL;\n")
1374                         write_c("\t} else {\n")
1375                         write_c("\t\tret->data = MALLOC(sizeof(" + vec_ty + ") * ret->datalen, \"" + struct_name + " Data\");\n")
1376                         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")
1377                         write_c("\t\tfor (size_t i = 0; i < ret->datalen; i++) {\n")
1378                         if ty_info.arg_conv is not None:
1379                             write_c("\t\t\t" + ty_info.c_ty + " arr_elem = java_elems[i];\n")
1380                             write_c("\t\t\t" + ty_info.arg_conv.replace("\n", "\n\t\t\t") + "\n")
1381                             write_c("\t\t\tret->data[i] = " + ty_info.arg_conv_name + ";\n")
1382                             assert ty_info.arg_conv_cleanup is None
1383                         else:
1384                             write_c("\t\t\tret->data[i] = java_elems[i];\n")
1385                         write_c("\t\t}\n")
1386                         cleanup = consts.release_native_arr_ptr_call("elems", "java_elems")
1387                         if cleanup is not None:
1388                             write_c("\t\t" + cleanup + ";\n")
1389                         write_c("\t}\n")
1390                         write_c("\treturn (long)ret;\n")
1391                         write_c("}\n")
1392
1393                     if ty_info.is_native_primitive:
1394                         clone_fns.add(struct_name.replace("LDK", "") + "_clone")
1395                         write_c("static inline " + struct_name + " " + struct_name.replace("LDK", "") + "_clone(const " + struct_name + " *orig) {\n")
1396                         write_c("\t" + struct_name + " ret = { .data = MALLOC(sizeof(" + ty_info.c_ty + ") * orig->datalen, \"" + struct_name + " clone bytes\"), .datalen = orig->datalen };\n")
1397                         write_c("\tmemcpy(ret.data, orig->data, sizeof(" + ty_info.c_ty + ") * ret.datalen);\n")
1398                         write_c("\treturn ret;\n}\n")
1399                     elif (ty_info.rust_obj.replace("LDK", "") + "_clone") in clone_fns:
1400                         ty_name = "CVec_" + ty_info.rust_obj.replace("LDK", "") + "Z";
1401                         clone_fns.add(ty_name + "_clone")
1402                         write_c("static inline " + struct_name + " " + ty_name + "_clone(const " + struct_name + " *orig) {\n")
1403                         write_c("\t" + struct_name + " ret = { .data = MALLOC(sizeof(" + ty_info.rust_obj + ") * orig->datalen, \"" + struct_name + " clone bytes\"), .datalen = orig->datalen };\n")
1404                         write_c("\tfor (size_t i = 0; i < ret.datalen; i++) {\n")
1405                         write_c("\t\tret.data[i] = " + ty_info.rust_obj.replace("LDK", "") + "_clone(&orig->data[i]);\n")
1406                         write_c("\t}\n\treturn ret;\n}\n")
1407                 elif is_union_enum:
1408                     assert(struct_name.endswith("_Tag"))
1409                     struct_name = struct_name[:-4]
1410                     union_enum_items[struct_name] = {"field_lines": field_lines}
1411                 elif struct_name.endswith("_Body") and struct_name.split("_")[0] in union_enum_items:
1412                     enum_var_name = struct_name.split("_")
1413                     union_enum_items[enum_var_name[0]][enum_var_name[1]] = field_lines
1414                 elif struct_name in union_enum_items:
1415                     map_complex_enum(struct_name, union_enum_items[struct_name])
1416                 elif is_unitary_enum:
1417                     map_unitary_enum(struct_name, field_lines)
1418                 elif len(trait_fn_lines) > 0:
1419                     trait_structs.add(struct_name)
1420                     map_trait(struct_name, field_var_lines, trait_fn_lines)
1421                 elif struct_name == "LDKTxOut":
1422                     with open(f"{sys.argv[3]}/structs/TxOut{consts.file_ext}", "w") as out_java_struct:
1423                         out_java_struct.write(consts.hu_struct_file_prefix)
1424                         out_java_struct.write("public class TxOut extends CommonBase{\n")
1425                         out_java_struct.write("\tTxOut(java.lang.Object _dummy, long ptr) { super(ptr); }\n")
1426                         out_java_struct.write("\tlong to_c_ptr() { return 0; }\n")
1427                         out_java_struct.write("\t@Override @SuppressWarnings(\"deprecation\")\n")
1428                         out_java_struct.write("\tprotected void finalize() throws Throwable {\n")
1429                         out_java_struct.write("\t\tsuper.finalize();\n")
1430                         out_java_struct.write("\t\tif (ptr != 0) { bindings.TxOut_free(ptr); }\n")
1431                         out_java_struct.write("\t}\n")
1432                         # TODO: TxOut body
1433                         out_java_struct.write("}")
1434                 else:
1435                     pass # Everything remaining is a byte[] or some form
1436                 cur_block_obj = None
1437         else:
1438             fn_ptr = fn_ptr_regex.match(line)
1439             fn_ret_arr = fn_ret_arr_regex.match(line)
1440             reg_fn = reg_fn_regex.match(line)
1441             const_val = const_val_regex.match(line)
1442
1443             if line.startswith("#include <"):
1444                 pass
1445             elif line.startswith("/*"):
1446                 #out_java.write("\t" + line)
1447                 if not line.endswith("*/\n"):
1448                     in_block_comment = True
1449             elif line.startswith("typedef enum "):
1450                 cur_block_obj = line
1451             elif line.startswith("typedef struct "):
1452                 cur_block_obj = line
1453             elif line.startswith("typedef union "):
1454                 cur_block_obj = line
1455             elif fn_ptr is not None:
1456                 map_fn(line, fn_ptr, None, None)
1457             elif fn_ret_arr is not None:
1458                 map_fn(line, fn_ret_arr, fn_ret_arr.group(4), None)
1459             elif reg_fn is not None:
1460                 map_fn(line, reg_fn, None, None)
1461             elif const_val_regex is not None:
1462                 # TODO Map const variables
1463                 pass
1464             else:
1465                 assert(line == "\n")
1466
1467     out_java.write("}\n")
1468     for struct_name in opaque_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     for struct_name in trait_structs:
1472         with open(f"{sys.argv[3]}/structs/{struct_name.replace('LDK', '')}{consts.file_ext}", "a") as out_java_struct:
1473             out_java_struct.write("}\n")
1474 with open(sys.argv[4], "w") as out_c:
1475     out_c.write(consts.c_file_pfx)
1476     out_c.write(consts.init_str(c_array_class_caches))
1477     out_c.write(c_file)