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

   1 #!/usr/bin/env python3
   2 import os, sys, re, subprocess
   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 target = None
  17 if sys.argv[6] == "java" or sys.argv[6] == "android":
  18     import java_strings
  19     from java_strings import Consts
  20     target = java_strings.Target.JAVA
  21     if sys.argv[6] == "android":
  22         target = java_strings.Target.ANDROID
  23 elif sys.argv[6] == "typescript":
  24     import typescript_strings
  25     from typescript_strings import Consts
  26     target = typescript_strings.Target.NODEJS
  27     if len(sys.argv) == 8 and sys.argv[7] == 'browser':
  28         target = typescript_strings.Target.BROWSER
  29 else:
  30     print("Only java or typescript can be set for lang")
  31     sys.exit(1)
  32
  33
  34 consts = Consts(DEBUG, target=target)
  35
  36 local_git_version = os.getenv("LDK_GARBAGECOLLECTED_GIT_OVERRIDE")
  37 if local_git_version is None:
  38     local_git_version = subprocess.check_output(["git", "describe", '--tag', '--dirty']).decode("utf-8").strip()
  39
  40 from bindingstypes import *
  41
  42 c_file = ""
  43 def write_c(s):
  44     global c_file
  45     c_file += s
  46
  47 def camel_to_snake(s):
  48     # Convert camel case to snake case, in a way that appears to match cbindgen
  49     con = "_"
  50     ret = ""
  51     lastchar = ""
  52     lastund = False
  53     for char in s:
  54         if lastchar.isupper():
  55             if not char.isupper() and not lastund:
  56                 ret = ret + "_"
  57                 lastund = True
  58             else:
  59                 lastund = False
  60             ret = ret + lastchar.lower()
  61         else:
  62             ret = ret + lastchar
  63             if char.isupper() and not lastund:
  64                 ret = ret + "_"
  65                 lastund = True
  66             else:
  67                 lastund = False
  68         lastchar = char
  69         if char.isnumeric():
  70             lastund = True
  71     return (ret + lastchar.lower()).strip("_")
  72
  73 def doc_to_params_ret_nullable(doc):
  74     if doc is None:
  75         return (set(), False)
  76     params = set()
  77     ret_null = False
  78     for line in doc.splitlines():
  79         if "may be NULL or all-0s to represent None" not in line:
  80             continue
  81         if "Note that the return value" in line:
  82             ret_null = True
  83         elif "Note that " in line:
  84             param = line.split("Note that ")[1].split(" ")[0]
  85             params.add(param)
  86     return (params, ret_null)
  87
  88 unitary_enums = set()
  89 complex_enums = set()
  90 opaque_structs = set()
  91 trait_structs = {}
  92 result_types = set()
  93 tuple_types = {}
  94
  95 var_is_arr_regex = re.compile("\(\*([A-za-z0-9_]*)\)\[([a-z0-9]*)\]")
  96 var_ty_regex = re.compile("([A-za-z_0-9]*)(.*)")
  97 java_c_types_none_allowed = True # Unset when we do the real pass that populates the above sets
  98 def java_c_types(fn_arg, ret_arr_len):
  99     fn_arg = fn_arg.strip()
 100     if fn_arg.startswith("MUST_USE_RES "):
 101         fn_arg = fn_arg[13:]
 102     is_const = False
 103     if fn_arg.startswith("const "):
 104         fn_arg = fn_arg[6:]
 105         is_const = True
 106     if fn_arg.startswith("struct "):
 107         fn_arg = fn_arg[7:]
 108     if fn_arg.startswith("enum "):
 109         fn_arg = fn_arg[5:]
 110     nonnull_ptr = "NONNULL_PTR" in fn_arg
 111     fn_arg = fn_arg.replace("NONNULL_PTR", "")
 112
 113     is_ptr = False
 114     take_by_ptr = False
 115     rust_obj = None
 116     arr_access = None
 117     java_hu_ty = None
 118     if fn_arg.startswith("LDKThirtyTwoBytes"):
 119         fn_arg = "uint8_t (*" + fn_arg[18:] + ")[32]"
 120         assert var_is_arr_regex.match(fn_arg[8:])
 121         rust_obj = "LDKThirtyTwoBytes"
 122         arr_access = "data"
 123     elif fn_arg.startswith("LDKTxid"):
 124         fn_arg = "uint8_t (*" + fn_arg[8:] + ")[32]"
 125         assert var_is_arr_regex.match(fn_arg[8:])
 126         rust_obj = "LDKThirtyTwoBytes"
 127         arr_access = "data"
 128     elif fn_arg.startswith("LDKPublicKey"):
 129         fn_arg = "uint8_t (*" + fn_arg[13:] + ")[33]"
 130         assert var_is_arr_regex.match(fn_arg[8:])
 131         rust_obj = "LDKPublicKey"
 132         arr_access = "compressed_form"
 133     elif fn_arg.startswith("LDKSecretKey"):
 134         fn_arg = "uint8_t (*" + fn_arg[13:] + ")[32]"
 135         assert var_is_arr_regex.match(fn_arg[8:])
 136         rust_obj = "LDKSecretKey"
 137         arr_access = "bytes"
 138     elif fn_arg.startswith("LDKSignature"):
 139         fn_arg = "uint8_t (*" + fn_arg[13:] + ")[64]"
 140         assert var_is_arr_regex.match(fn_arg[8:])
 141         rust_obj = "LDKSignature"
 142         arr_access = "compact_form"
 143     elif fn_arg.startswith("LDKRecoverableSignature"):
 144         fn_arg = "uint8_t (*" + fn_arg[25:] + ")[68]"
 145         assert var_is_arr_regex.match(fn_arg[8:])
 146         rust_obj = "LDKRecoverableSignature"
 147         arr_access = "serialized_form"
 148     elif fn_arg.startswith("LDKThreeBytes"):
 149         fn_arg = "uint8_t (*" + fn_arg[14:] + ")[3]"
 150         assert var_is_arr_regex.match(fn_arg[8:])
 151         rust_obj = "LDKThreeBytes"
 152         arr_access = "data"
 153     elif fn_arg.startswith("LDKFourBytes"):
 154         fn_arg = "uint8_t (*" + fn_arg[13:] + ")[4]"
 155         assert var_is_arr_regex.match(fn_arg[8:])
 156         rust_obj = "LDKFourBytes"
 157         arr_access = "data"
 158     elif fn_arg.startswith("LDKSixteenBytes"):
 159         fn_arg = "uint8_t (*" + fn_arg[16:] + ")[16]"
 160         assert var_is_arr_regex.match(fn_arg[8:])
 161         rust_obj = "LDKSixteenBytes"
 162         arr_access = "data"
 163     elif fn_arg.startswith("LDKTwentyBytes"):
 164         fn_arg = "uint8_t (*" + fn_arg[15:] + ")[20]"
 165         assert var_is_arr_regex.match(fn_arg[8:])
 166         rust_obj = "LDKTwentyBytes"
 167         arr_access = "data"
 168     elif fn_arg.startswith("LDKTenBytes"):
 169         fn_arg = "uint8_t (*" + fn_arg[12:] + ")[10]"
 170         assert var_is_arr_regex.match(fn_arg[8:])
 171         rust_obj = "LDKTenBytes"
 172         arr_access = "data"
 173     elif fn_arg.startswith("LDKu8slice"):
 174         fn_arg = "uint8_t (*" + fn_arg[11:] + ")[datalen]"
 175         assert var_is_arr_regex.match(fn_arg[8:])
 176         rust_obj = "LDKu8slice"
 177         arr_access = "data"
 178     elif fn_arg.startswith("LDKCVec_u8Z"):
 179         fn_arg = "uint8_t (*" + fn_arg[12:] + ")[datalen]"
 180         rust_obj = "LDKCVec_u8Z"
 181         assert var_is_arr_regex.match(fn_arg[8:])
 182         arr_access = "data"
 183     elif fn_arg.startswith("LDKTransaction ") or fn_arg == "LDKTransaction":
 184         fn_arg = "uint8_t (*" + fn_arg[15:] + ")[datalen]"
 185         rust_obj = "LDKTransaction"
 186         assert var_is_arr_regex.match(fn_arg[8:])
 187         arr_access = "data"
 188     elif fn_arg.startswith("LDKCVec_"):
 189         is_ptr = False
 190         if "*" in fn_arg:
 191             fn_arg = fn_arg.replace("*", "")
 192             is_ptr = True
 193
 194         tyn = fn_arg[8:].split(" ")
 195         assert tyn[0].endswith("Z")
 196         if tyn[0] == "u64Z":
 197             new_arg = "uint64_t"
 198         else:
 199             new_arg = "LDK" + tyn[0][:-1]
 200         for a in tyn[1:]:
 201             new_arg = new_arg + " " + a
 202         res = java_c_types(new_arg, ret_arr_len)
 203         if res is None:
 204             assert java_c_types_none_allowed
 205             return None
 206         if is_ptr:
 207             res.pass_by_ref = True
 208         if res.is_native_primitive or res.passed_as_ptr:
 209             return TypeInfo(rust_obj=fn_arg.split(" ")[0], java_ty=res.java_ty + "[]", java_hu_ty=res.java_hu_ty + "[]",
 210                 java_fn_ty_arg="[" + res.java_fn_ty_arg, c_ty=res.c_ty + "Array", passed_as_ptr=False, is_ptr=is_ptr,
 211                 nonnull_ptr=nonnull_ptr, is_const=is_const,
 212                 var_name=res.var_name, arr_len="datalen", arr_access="data", subty=res, is_native_primitive=False)
 213         else:
 214             return TypeInfo(rust_obj=fn_arg.split(" ")[0], java_ty=res.java_ty + "[]", java_hu_ty=res.java_hu_ty + "[]",
 215                 java_fn_ty_arg="[" + res.java_fn_ty_arg, c_ty=consts.ptr_arr, passed_as_ptr=False, is_ptr=is_ptr,
 216                 nonnull_ptr=nonnull_ptr, is_const=is_const,
 217                 var_name=res.var_name, arr_len="datalen", arr_access="data", subty=res, is_native_primitive=False)
 218
 219     is_primitive = False
 220     arr_len = None
 221     mapped_type = []
 222     java_type_plural = None
 223     if fn_arg.startswith("void"):
 224         java_ty = "void"
 225         c_ty = "void"
 226         fn_ty_arg = "V"
 227         fn_arg = fn_arg[4:].strip()
 228         is_primitive = True
 229     elif fn_arg.startswith("bool"):
 230         java_ty = "boolean"
 231         c_ty = "jboolean"
 232         fn_ty_arg = "Z"
 233         fn_arg = fn_arg[4:].strip()
 234         is_primitive = True
 235     elif fn_arg.startswith("uint8_t"):
 236         mapped_type = consts.c_type_map['uint8_t']
 237         java_ty = mapped_type[0]
 238         c_ty = "int8_t"
 239         fn_ty_arg = "B"
 240         fn_arg = fn_arg[7:].strip()
 241         is_primitive = True
 242     elif fn_arg.startswith("LDKu5"):
 243         java_ty = consts.c_type_map['uint8_t'][0]
 244         java_hu_ty = "UInt5"
 245         rust_obj = "LDKu5"
 246         c_ty = "int8_t"
 247         fn_ty_arg = "B"
 248         fn_arg = fn_arg[6:].strip()
 249     elif fn_arg.startswith("uint16_t"):
 250         mapped_type = consts.c_type_map['uint16_t']
 251         java_ty = mapped_type[0]
 252         c_ty = "int16_t"
 253         fn_ty_arg = "S"
 254         fn_arg = fn_arg[8:].strip()
 255         is_primitive = True
 256     elif fn_arg.startswith("uint32_t"):
 257         mapped_type = consts.c_type_map['uint32_t']
 258         java_ty = mapped_type[0]
 259         c_ty = "int32_t"
 260         fn_ty_arg = "I"
 261         fn_arg = fn_arg[8:].strip()
 262         is_primitive = True
 263     elif fn_arg.startswith("uint64_t") or fn_arg.startswith("uintptr_t"):
 264         # TODO: uintptr_t is arch-dependent :(
 265         mapped_type = consts.c_type_map['uint64_t']
 266         java_ty = mapped_type[0]
 267         fn_ty_arg = "J"
 268         if fn_arg.startswith("uint64_t"):
 269             c_ty = "int64_t"
 270             fn_arg = fn_arg[8:].strip()
 271         else:
 272             c_ty = "int64_t"
 273             rust_obj = "uintptr_t"
 274             fn_arg = fn_arg[9:].strip()
 275         is_primitive = True
 276     elif is_const and fn_arg.startswith("char *"):
 277         java_ty = "String"
 278         c_ty = "const char*"
 279         fn_ty_arg = "Ljava/lang/String;"
 280         fn_arg = fn_arg[6:].strip()
 281     elif fn_arg.startswith("LDKStr"):
 282         rust_obj = "LDKStr"
 283         java_ty = "String"
 284         c_ty = "jstring"
 285         fn_ty_arg = "Ljava/lang/String;"
 286         fn_arg = fn_arg[6:].strip()
 287         arr_access = "chars"
 288         arr_len = "len"
 289     else:
 290         ma = var_ty_regex.match(fn_arg)
 291         if ma.group(1).strip() in unitary_enums:
 292             assert ma.group(1).strip().startswith("LDK")
 293             java_ty = ma.group(1).strip()[3:]
 294             java_hu_ty = java_ty
 295             c_ty = consts.result_c_ty
 296             fn_ty_arg = "Lorg/ldk/enums/" + java_ty + ";"
 297             fn_arg = ma.group(2).strip()
 298             rust_obj = ma.group(1).strip()
 299         elif ma.group(1).strip().startswith("LDKC2Tuple"):
 300             c_ty = consts.ptr_c_ty
 301             java_ty = consts.ptr_native_ty
 302             java_hu_ty = "TwoTuple<"
 303             if not ma.group(1).strip() in tuple_types:
 304                 assert java_c_types_none_allowed
 305                 return None
 306             for idx, ty_info in enumerate(tuple_types[ma.group(1).strip()][0]):
 307                 if idx != 0:
 308                     java_hu_ty = java_hu_ty + ", "
 309                 if ty_info.is_native_primitive:
 310                     if ty_info.java_hu_ty == "int":
 311                         java_hu_ty = java_hu_ty + "Integer" # Java concrete integer type is Integer, not Int
 312                     else:
 313                         java_hu_ty = java_hu_ty + ty_info.java_hu_ty.title() # If we're a primitive, capitalize the first letter
 314                 else:
 315                     java_hu_ty = java_hu_ty + ty_info.java_hu_ty
 316             java_hu_ty = java_hu_ty + ">"
 317             fn_ty_arg = "J"
 318             fn_arg = ma.group(2).strip()
 319             rust_obj = ma.group(1).strip()
 320             take_by_ptr = True
 321         elif ma.group(1).strip().startswith("LDKC3Tuple"):
 322             c_ty = consts.ptr_c_ty
 323             java_ty = consts.ptr_native_ty
 324             java_hu_ty = "ThreeTuple<"
 325             if not ma.group(1).strip() in tuple_types:
 326                 assert java_c_types_none_allowed
 327                 return None
 328             for idx, ty_info in enumerate(tuple_types[ma.group(1).strip()][0]):
 329                 if idx != 0:
 330                     java_hu_ty = java_hu_ty + ", "
 331                 if ty_info.is_native_primitive:
 332                     if ty_info.java_hu_ty == "int":
 333                         java_hu_ty = java_hu_ty + "Integer" # Java concrete integer type is Integer, not Int
 334                     else:
 335                         java_hu_ty = java_hu_ty + ty_info.java_hu_ty.title() # If we're a primitive, capitalize the first letter
 336                 else:
 337                     java_hu_ty = java_hu_ty + ty_info.java_hu_ty
 338             java_hu_ty = java_hu_ty + ">"
 339             fn_ty_arg = "J"
 340             fn_arg = ma.group(2).strip()
 341             rust_obj = ma.group(1).strip()
 342             take_by_ptr = True
 343         else:
 344             c_ty = consts.ptr_c_ty
 345             java_ty = consts.ptr_native_ty
 346             java_hu_ty = ma.group(1).strip().replace("LDKCOption", "Option").replace("LDKCResult", "Result").replace("LDK", "")
 347             fn_ty_arg = "J"
 348             fn_arg = ma.group(2).strip()
 349             rust_obj = ma.group(1).strip()
 350             take_by_ptr = True
 351
 352     if fn_arg.startswith(" *") or fn_arg.startswith("*"):
 353         fn_arg = fn_arg.replace("*", "").strip()
 354         is_ptr = True
 355         c_ty = consts.ptr_c_ty
 356         java_ty = consts.ptr_native_ty
 357         fn_ty_arg = "J"
 358
 359     var_is_arr = var_is_arr_regex.match(fn_arg)
 360     if var_is_arr is not None or ret_arr_len is not None:
 361         assert(not take_by_ptr)
 362         assert(not is_ptr)
 363         # is there a special case for plurals?
 364         if len(mapped_type) == 2:
 365             java_ty = mapped_type[1]
 366         else:
 367             java_ty = java_ty + "[]"
 368         c_ty = c_ty + "Array"
 369         if var_is_arr is not None:
 370             if var_is_arr.group(1) == "":
 371                 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,
 372                     passed_as_ptr=False, is_ptr=False, nonnull_ptr=nonnull_ptr, var_name="arg",
 373                     arr_len=var_is_arr.group(2), arr_access=arr_access, is_native_primitive=False)
 374             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,
 375                 passed_as_ptr=False, is_ptr=False, nonnull_ptr=nonnull_ptr, var_name=var_is_arr.group(1),
 376                 arr_len=var_is_arr.group(2), arr_access=arr_access, is_native_primitive=False)
 377
 378     if java_hu_ty is None:
 379         java_hu_ty = java_ty
 380     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,
 381         is_const=is_const, is_ptr=is_ptr, nonnull_ptr=nonnull_ptr, var_name=fn_arg, arr_len=arr_len, arr_access=arr_access, is_native_primitive=is_primitive)
 382
 383 fn_ptr_regex = re.compile("^extern const ([A-Za-z_0-9\* ]*) \(\*(.*)\)\((.*)\);$")
 384 fn_ret_arr_regex = re.compile("(.*) \(\*(.*)\((.*)\)\)\[([0-9]*)\];$")
 385 reg_fn_regex = re.compile("([A-Za-z_0-9\* ]* \*?)([a-zA-Z_0-9]*)\((.*)\);$")
 386 clone_fns = set()
 387 constructor_fns = {}
 388
 389 from gen_type_mapping import TypeMappingGenerator
 390 type_mapping_generator = TypeMappingGenerator(java_c_types, consts, opaque_structs, clone_fns, unitary_enums, trait_structs, complex_enums, result_types, tuple_types)
 391
 392 with open(sys.argv[1]) as in_h:
 393     for line in in_h:
 394         reg_fn = reg_fn_regex.match(line)
 395         if reg_fn is not None:
 396             if reg_fn.group(2).endswith("_clone"):
 397                 clone_fns.add(reg_fn.group(2))
 398             else:
 399                 rty = java_c_types(reg_fn.group(1), None)
 400                 if rty is not None and not rty.is_native_primitive and reg_fn.group(2) == rty.java_hu_ty + "_new":
 401                     constructor_fns[rty.rust_obj] = reg_fn.group(3)
 402             continue
 403         arr_fn = fn_ret_arr_regex.match(line)
 404         if arr_fn is not None:
 405             if arr_fn.group(2).endswith("_clone"):
 406                 clone_fns.add(arr_fn.group(2))
 407             # No object constructors return arrays, as then they wouldn't be an object constructor
 408             continue
 409
 410 # Define some manual clones...
 411 clone_fns.add("ThirtyTwoBytes_clone")
 412 write_c("static inline struct LDKThirtyTwoBytes ThirtyTwoBytes_clone(const struct LDKThirtyTwoBytes *orig) { struct LDKThirtyTwoBytes ret; memcpy(ret.data, orig->data, 32); return ret; }\n")
 413
 414 java_c_types_none_allowed = False # C structs created by cbindgen are declared in dependency order
 415
 416 with open(f"{sys.argv[3]}/structs/UtilMethods{consts.file_ext}", "a") as util:
 417     util.write(consts.util_fn_pfx)
 418
 419 with open(sys.argv[1]) as in_h, open(sys.argv[2], "w") as out_java:
 420     # Map a top-level function
 421     def map_fn(line, re_match, ret_arr_len, c_call_string, doc_comment):
 422         method_return_type = re_match.group(1)
 423         method_name = re_match.group(2)
 424         orig_method_name = str(method_name)
 425         method_comma_separated_arguments = re_match.group(3)
 426         method_arguments = method_comma_separated_arguments.split(',')
 427
 428         is_free = method_name.endswith("_free")
 429         if method_name.startswith("COption") or method_name.startswith("CResult"):
 430             struct_meth = method_name.rsplit("Z", 1)[0][1:] + "Z"
 431         else:
 432             struct_meth = method_name.split("_")[0]
 433
 434         return_type_info = type_mapping_generator.map_type(method_return_type.strip() + " ret", True, ret_arr_len, False, False)
 435
 436         (params_nullable, ret_nullable) = doc_to_params_ret_nullable(doc_comment)
 437         if ret_nullable:
 438             return_type_info.nullable = True
 439
 440         argument_types = []
 441         default_constructor_args = {}
 442         takes_self = False
 443         takes_self_ptr = False
 444         args_known = True
 445
 446         for argument_index, argument in enumerate(method_arguments):
 447             argument_conversion_info = type_mapping_generator.map_type(argument, False, None, is_free, True)
 448             if argument_index == 0 and argument_conversion_info.java_hu_ty == struct_meth:
 449                 takes_self = True
 450                 if argument_conversion_info.ty_info.is_ptr:
 451                     takes_self_ptr = True
 452             elif argument_conversion_info.arg_name in params_nullable:
 453                 argument_conversion_info.nullable = True
 454             if argument_conversion_info.arg_conv is not None and "Warning" in argument_conversion_info.arg_conv:
 455                 assert not argument_conversion_info.arg_name in params_nullable
 456                 if argument_conversion_info.rust_obj in constructor_fns:
 457                     assert not is_free
 458                     for explode_arg in constructor_fns[argument_conversion_info.rust_obj].split(','):
 459                         explode_arg_conv = type_mapping_generator.map_type(explode_arg, False, None, False, True)
 460                         if explode_arg_conv.c_ty == "void":
 461                             # We actually want to handle this case, but for now its only used in NetGraphMsgHandler::new()
 462                             # which ends up resulting in a redundant constructor - both without arguments for the NetworkGraph.
 463                             args_known = False
 464                             pass
 465                         if not argument_conversion_info.arg_name in default_constructor_args:
 466                             default_constructor_args[argument_conversion_info.arg_name] = []
 467                         default_constructor_args[argument_conversion_info.arg_name].append(explode_arg_conv)
 468             argument_types.append(argument_conversion_info)
 469         if not takes_self and return_type_info.java_hu_ty != struct_meth:
 470             if not return_type_info.java_hu_ty.startswith("Result_" + struct_meth):
 471                 method_name = orig_method_name
 472                 struct_meth = ""
 473
 474         out_java.write("\t// " + line)
 475         (out_java_delta, out_c_delta, out_java_struct_delta) = \
 476             consts.map_function(argument_types, c_call_string, method_name, return_type_info, struct_meth, default_constructor_args, takes_self, takes_self_ptr, args_known, type_mapping_generator, doc_comment)
 477         out_java.write(out_java_delta)
 478
 479         if is_free:
 480             assert len(argument_types) == 1
 481             assert return_type_info.c_ty == "void"
 482             write_c(consts.c_fn_ty_pfx + "void " + consts.c_fn_name_define_pfx(method_name, True) + argument_types[0].c_ty + " " + argument_types[0].ty_info.var_name + ") {\n")
 483             if argument_types[0].ty_info.passed_as_ptr and not argument_types[0].ty_info.rust_obj in opaque_structs:
 484                 write_c("\tif ((" + argument_types[0].ty_info.var_name + " & 1) != 0) return;\n")
 485
 486             for info in argument_types:
 487                 if info.arg_conv is not None:
 488                     write_c("\t" + info.arg_conv.replace('\n', "\n\t") + "\n")
 489             assert c_call_string is None
 490             write_c("\t" + method_name + "(")
 491             if argument_types[0].arg_conv_name is not None:
 492                 write_c(argument_types[0].arg_conv_name)
 493             write_c(");")
 494             for info in argument_types:
 495                 if info.arg_conv_cleanup is not None:
 496                     write_c("\n\t" + info.arg_conv_cleanup.replace("\n", "\n\t"))
 497             write_c("\n}\n\n")
 498         else:
 499             write_c(out_c_delta)
 500
 501         out_java_struct = None
 502         expected_struct = "LDK" + struct_meth
 503         expected_cstruct = "LDKC" + struct_meth
 504         if (expected_struct in opaque_structs or expected_struct in trait_structs
 505                 or expected_struct in complex_enums or expected_cstruct in complex_enums
 506                 or expected_cstruct in result_types) and not is_free:
 507             out_java_struct = open(f"{sys.argv[3]}/structs/{struct_meth}{consts.file_ext}", "a")
 508             out_java_struct.write(out_java_struct_delta)
 509         elif (not is_free and not method_name.endswith("_clone") and
 510                 not method_name.startswith("_") and
 511                 method_name != "check_platform" and method_name != "Result_read" and
 512                 not expected_struct in unitary_enums and
 513                 ((not method_name.startswith("C2Tuple_") and not method_name.startswith("C3Tuple_"))
 514                   or method_name.endswith("_read"))):
 515             out_java_struct = open(f"{sys.argv[3]}/structs/UtilMethods{consts.file_ext}", "a")
 516             for line in out_java_struct_delta.splitlines():
 517                 if not line.strip().startswith("this."):
 518                     out_java_struct.write(line + "\n")
 519                 else:
 520                     out_java_struct.write("\t\t// " + line.strip() + "\n")
 521
 522     def map_unitary_enum(struct_name, field_lines, enum_doc_comment):
 523         assert struct_name.startswith("LDK")
 524         with open(f"{sys.argv[3]}/enums/{struct_name[3:]}{consts.file_ext}", "w") as out_java_enum:
 525             unitary_enums.add(struct_name)
 526             for idx, struct_line in enumerate(field_lines):
 527                 if idx == 0:
 528                     assert(struct_line == "typedef enum %s {" % struct_name)
 529                 elif idx == len(field_lines) - 3:
 530                     assert(struct_line.endswith("_Sentinel,"))
 531                 elif idx == len(field_lines) - 2:
 532                     assert(struct_line == "} %s;" % struct_name)
 533                 elif idx == len(field_lines) - 1:
 534                     assert(struct_line == "")
 535             assert struct_name.startswith("LDK")
 536             (c_out, native_file_out, native_out) = consts.native_c_unitary_enum_map(struct_name[3:], [x.strip().strip(",") for x in field_lines[1:-3]], enum_doc_comment)
 537             write_c(c_out)
 538             out_java_enum.write(native_file_out)
 539             out_java.write(native_out)
 540
 541     def map_complex_enum(struct_name, union_enum_items, inline_enum_variants, enum_doc_comment):
 542         java_hu_type = struct_name.replace("LDK", "").replace("COption", "Option")
 543         complex_enums.add(struct_name)
 544
 545         enum_variants = []
 546         tag_field_lines = union_enum_items["field_lines"]
 547         for idx, struct_line in enumerate(tag_field_lines):
 548             if idx == 0:
 549                 assert(struct_line == "typedef enum %s_Tag {" % struct_name)
 550             elif idx == len(tag_field_lines) - 3:
 551                 assert(struct_line.endswith("_Sentinel,"))
 552             elif idx == len(tag_field_lines) - 2:
 553                 assert(struct_line == "} %s_Tag;" % struct_name)
 554             elif idx == len(tag_field_lines) - 1:
 555                 assert(struct_line == "")
 556             else:
 557                 variant_name = struct_line.strip(' ,')[len(struct_name) + 1:]
 558                 fields = []
 559                 if "LDK" + variant_name in union_enum_items:
 560                     enum_var_lines = union_enum_items["LDK" + variant_name]
 561                     for idx, field in enumerate(enum_var_lines):
 562                         if idx != 0 and idx < len(enum_var_lines) - 2 and field.strip() != "":
 563                             fields.append(type_mapping_generator.map_type(field.strip(' ;'), False, None, False, True))
 564                     enum_variants.append(ComplexEnumVariantInfo(variant_name, fields, False))
 565                 elif camel_to_snake(variant_name) in inline_enum_variants:
 566                     fields.append(type_mapping_generator.map_type(inline_enum_variants[camel_to_snake(variant_name)] + " " + camel_to_snake(variant_name), False, None, False, True))
 567                     enum_variants.append(ComplexEnumVariantInfo(variant_name, fields, True))
 568                 else:
 569                     enum_variants.append(ComplexEnumVariantInfo(variant_name, fields, True))
 570
 571         with open(f"{sys.argv[3]}/structs/{java_hu_type}{consts.file_ext}", "w") as out_java_enum:
 572             (out_java_addendum, out_java_enum_addendum, out_c_addendum) = consts.map_complex_enum(struct_name, enum_variants, camel_to_snake, enum_doc_comment)
 573
 574             out_java_enum.write(out_java_enum_addendum)
 575             out_java.write(out_java_addendum)
 576             write_c(out_c_addendum)
 577
 578     def map_trait(struct_name, field_var_lines, trait_fn_lines, trait_doc_comment):
 579         with open(f"{sys.argv[3]}/structs/{struct_name.replace('LDK', '')}{consts.file_ext}", "w") as out_java_trait:
 580             field_var_convs = []
 581             flattened_field_var_convs = []
 582             for var_line in field_var_lines:
 583                 if var_line.group(1) in trait_structs:
 584                     field_var_convs.append((var_line.group(1), var_line.group(2), trait_structs[var_line.group(1)]))
 585                     flattened_field_var_convs.append((var_line.group(1), var_line.group(2), ))
 586                     flattened_field_var_convs.extend(trait_structs[var_line.group(1)])
 587                 else:
 588                     mapped = type_mapping_generator.map_type(var_line.group(1) + " " + var_line.group(2), False, None, False, False)
 589                     field_var_convs.append(mapped)
 590                     flattened_field_var_convs.append(mapped)
 591             trait_structs[struct_name] = field_var_convs
 592
 593             field_fns = []
 594             for fn_docs, fn_line in trait_fn_lines:
 595                 if fn_line == "cloned":
 596                     ret_ty_info = type_mapping_generator.map_type("void", True, None, False, False)
 597                     field_fns.append(TraitMethInfo("cloned", False, ret_ty_info, [], fn_docs))
 598                 else:
 599                     ret_ty_info = type_mapping_generator.map_type(fn_line.group(2).strip() + " ret", True, None, False, False)
 600                     is_const = fn_line.group(4) is not None
 601                     (nullable_params, ret_nullable) = doc_to_params_ret_nullable(fn_docs)
 602                     if ret_nullable:
 603                         assert False # This isn't yet handled on the Java side
 604                         ret_ty_info.nullable = True
 605
 606                     arg_tys = []
 607                     for idx, arg in enumerate(fn_line.group(5).split(',')):
 608                         if arg == "":
 609                             continue
 610                         arg_conv_info = type_mapping_generator.map_type(arg, True, None, False, False)
 611                         if arg_conv_info.arg_name in nullable_params:
 612                             # Types that are actually null instead of all-0s aren't yet handled on the Java side:
 613                             assert arg_conv_info.rust_obj == "LDKPublicKey"
 614                             arg_conv_info.nullable = True
 615                         arg_tys.append(arg_conv_info)
 616                     field_fns.append(TraitMethInfo(fn_line.group(3), is_const, ret_ty_info, arg_tys, fn_docs))
 617
 618             (out_java_addendum, out_java_trait_addendum, out_c_addendum) = consts.native_c_map_trait(struct_name, field_var_convs, flattened_field_var_convs, field_fns, trait_doc_comment)
 619             write_c(out_c_addendum)
 620             out_java_trait.write(out_java_trait_addendum)
 621             out_java.write(out_java_addendum)
 622
 623         for fn_docs, fn_line in trait_fn_lines:
 624             if fn_line == "cloned":
 625                 continue
 626             # For now, just disable enabling the _call_log - we don't know how to inverse-map String
 627             is_log = fn_line.group(3) == "log" and struct_name == "LDKLogger"
 628             if fn_line.group(3) != "free" and fn_line.group(3) != "eq" and not is_log:
 629                 dummy_line = fn_line.group(2) + struct_name.replace("LDK", "") + "_" + fn_line.group(3) + " " + struct_name + " *NONNULL_PTR this_arg" + fn_line.group(5) + "\n"
 630                 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", fn_docs)
 631         for idx, var_line in enumerate(field_var_lines):
 632             if var_line.group(1) not in trait_structs:
 633                 write_c(var_line.group(1) + " " + struct_name + "_set_get_" + var_line.group(2) + "(" + struct_name + "* this_arg) {\n")
 634                 write_c("\tif (this_arg->set_" + var_line.group(2) + " != NULL)\n")
 635                 write_c("\t\tthis_arg->set_" + var_line.group(2) + "(this_arg);\n")
 636                 write_c("\treturn this_arg->" + var_line.group(2) + ";\n")
 637                 write_c("}\n")
 638                 dummy_line = var_line.group(1) + " " + struct_name.replace("LDK", "") + "_get_" + var_line.group(2) + " " + struct_name + " *NONNULL_PTR this_arg" + fn_line.group(5) + "\n"
 639                 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", fn_docs)
 640
 641     def map_result(struct_name, res_ty, err_ty):
 642         result_types.add(struct_name)
 643         human_ty = struct_name.replace("LDKCResult", "Result")
 644         with open(f"{sys.argv[3]}/structs/{human_ty}{consts.file_ext}", "w") as out_java_struct:
 645             out_java_struct.write(consts.hu_struct_file_prefix)
 646             out_java_struct.write("public class " + human_ty + " extends CommonBase {\n")
 647             out_java_struct.write("\tprivate " + human_ty + "(Object _dummy, long ptr) { super(ptr); }\n")
 648             out_java_struct.write("\tprotected void finalize() throws Throwable {\n")
 649             out_java_struct.write("\t\tif (ptr != 0) { bindings." + struct_name.replace("LDK","") + "_free(ptr); } super.finalize();\n")
 650             out_java_struct.write("\t}\n\n")
 651             out_java_struct.write("\tstatic " + human_ty + " constr_from_ptr(long ptr) {\n")
 652             out_java_struct.write("\t\tif (bindings." + struct_name + "_result_ok(ptr)) {\n")
 653             out_java_struct.write("\t\t\treturn new " + human_ty + "_OK(null, ptr);\n")
 654             out_java_struct.write("\t\t} else {\n")
 655             out_java_struct.write("\t\t\treturn new " + human_ty + "_Err(null, ptr);\n")
 656             out_java_struct.write("\t\t}\n")
 657             out_java_struct.write("\t}\n")
 658
 659             res_map = type_mapping_generator.map_type(res_ty + " res", True, None, False, True)
 660             err_map = type_mapping_generator.map_type(err_ty + " err", True, None, False, True)
 661             can_clone = True
 662             if not res_map.is_native_primitive and (res_map.rust_obj.replace("LDK", "") + "_clone" not in clone_fns):
 663                 can_clone = False
 664             if not err_map.is_native_primitive and (err_map.rust_obj.replace("LDK", "") + "_clone" not in clone_fns):
 665                 can_clone = False
 666
 667             out_java.write("\tpublic static native boolean " + struct_name + "_result_ok(long arg);\n")
 668             write_c(consts.c_fn_ty_pfx + "jboolean " + consts.c_fn_name_define_pfx(struct_name + "_result_ok", True) + consts.ptr_c_ty + " arg) {\n")
 669             write_c("\treturn ((" + struct_name + "*)arg)->result_ok;\n")
 670             write_c("}\n")
 671
 672             out_java.write("\tpublic static native " + res_map.java_ty + " " + struct_name + "_get_ok(long arg);\n")
 673             write_c(consts.c_fn_ty_pfx + res_map.c_ty + " " + consts.c_fn_name_define_pfx(struct_name + "_get_ok", True) + consts.ptr_c_ty + " arg) {\n")
 674             write_c("\t" + struct_name + " *val = (" + struct_name + "*)(arg & ~1);\n")
 675             write_c("\tCHECK(val->result_ok);\n\t")
 676             out_java_struct.write("\tpublic static final class " + human_ty + "_OK extends " + human_ty + " {\n")
 677             if res_map.ret_conv is not None:
 678                 write_c(res_map.ret_conv[0].replace("\n", "\n\t") + "(*val->contents.result)")
 679                 write_c(res_map.ret_conv[1].replace("\n", "\n\t") + "\n\treturn " + res_map.ret_conv_name)
 680             else:
 681                 write_c("return *val->contents.result")
 682             write_c(";\n}\n")
 683
 684             if res_map.java_hu_ty != "void":
 685                 out_java_struct.write("\t\tpublic final " + res_map.java_hu_ty + " res;\n")
 686             out_java_struct.write("\t\tprivate " + human_ty + "_OK(Object _dummy, long ptr) {\n")
 687             out_java_struct.write("\t\t\tsuper(_dummy, ptr);\n")
 688             if res_map.java_hu_ty == "void":
 689                 pass
 690             elif res_map.to_hu_conv is not None:
 691                 out_java_struct.write("\t\t\t" + res_map.java_ty + " res = bindings." + struct_name + "_get_ok(ptr);\n")
 692                 out_java_struct.write("\t\t\t" + res_map.to_hu_conv.replace("\n", "\n\t\t\t"))
 693                 out_java_struct.write("\n\t\t\tthis.res = " + res_map.to_hu_conv_name + ";\n")
 694             else:
 695                 out_java_struct.write("\t\t\tthis.res = bindings." + struct_name + "_get_ok(ptr);\n")
 696             out_java_struct.write("\t\t}\n")
 697             out_java_struct.write("\t}\n\n")
 698
 699             out_java.write("\tpublic static native " + err_map.java_ty + " " + struct_name + "_get_err(long arg);\n")
 700             write_c(consts.c_fn_ty_pfx + err_map.c_ty + " " + consts.c_fn_name_define_pfx(struct_name + "_get_err", True) + consts.ptr_c_ty + " arg) {\n")
 701             write_c("\t" + struct_name + " *val = (" + struct_name + "*)(arg & ~1);\n")
 702             write_c("\tCHECK(!val->result_ok);\n\t")
 703             out_java_struct.write("\tpublic static final class " + human_ty + "_Err extends " + human_ty + " {\n")
 704             if err_map.ret_conv is not None:
 705                 write_c(err_map.ret_conv[0].replace("\n", "\n\t") + "(*val->contents.err)")
 706                 write_c(err_map.ret_conv[1].replace("\n", "\n\t") + "\n\treturn " + err_map.ret_conv_name)
 707             else:
 708                 write_c("return *val->contents.err")
 709             write_c(";\n}\n")
 710
 711             if err_map.java_hu_ty != "void":
 712                 out_java_struct.write("\t\tpublic final " + err_map.java_hu_ty + " err;\n")
 713             out_java_struct.write("\t\tprivate " + human_ty + "_Err(Object _dummy, long ptr) {\n")
 714             out_java_struct.write("\t\t\tsuper(_dummy, ptr);\n")
 715             if err_map.java_hu_ty == "void":
 716                 pass
 717             elif err_map.to_hu_conv is not None:
 718                 out_java_struct.write("\t\t\t" + err_map.java_ty + " err = bindings." + struct_name + "_get_err(ptr);\n")
 719                 out_java_struct.write("\t\t\t" + err_map.to_hu_conv.replace("\n", "\n\t\t\t"))
 720                 out_java_struct.write("\n\t\t\tthis.err = " + err_map.to_hu_conv_name + ";\n")
 721             else:
 722                 out_java_struct.write("\t\t\tthis.err = bindings." + struct_name + "_get_err(ptr);\n")
 723             out_java_struct.write("\t\t}\n")
 724
 725             out_java_struct.write("\t}\n\n")
 726
 727     def map_tuple(struct_name, field_lines):
 728         out_java.write("\tpublic static native long " + struct_name + "_new(")
 729         write_c(consts.c_fn_ty_pfx + consts.ptr_c_ty + " " + consts.c_fn_name_define_pfx(struct_name + "_new", len(field_lines) > 3))
 730         ty_list = []
 731         for idx, line in enumerate(field_lines):
 732             if idx != 0 and idx < len(field_lines) - 2:
 733                 ty_info = java_c_types(line.strip(';'), None)
 734                 if idx != 1:
 735                     out_java.write(", ")
 736                     write_c(", ")
 737                 e = chr(ord('a') + idx - 1)
 738                 out_java.write(ty_info.java_ty + " " + e)
 739                 write_c(ty_info.c_ty + " " + e)
 740                 ty_list.append(ty_info)
 741         tuple_types[struct_name] = (ty_list, struct_name)
 742         out_java.write(");\n")
 743         write_c(") {\n")
 744         write_c("\t" + struct_name + "* ret = MALLOC(sizeof(" + struct_name + "), \"" + struct_name + "\");\n")
 745         for idx, line in enumerate(field_lines):
 746             if idx != 0 and idx < len(field_lines) - 2:
 747                 ty_info = type_mapping_generator.map_type(line.strip(';'), False, None, False, False)
 748                 e = chr(ord('a') + idx - 1)
 749                 if ty_info.arg_conv is not None:
 750                     write_c("\t" + ty_info.arg_conv.replace("\n", "\n\t"))
 751                     write_c("\n\tret->" + e + " = " + ty_info.arg_conv_name + ";\n")
 752                 else:
 753                     write_c("\tret->" + e + " = " + e + ";\n")
 754                 if ty_info.arg_conv_cleanup is not None:
 755                     write_c("\t//TODO: Really need to call " + ty_info.arg_conv_cleanup + " here\n")
 756         write_c("\treturn (uint64_t)ret;\n")
 757         write_c("}\n")
 758
 759         for idx, ty_info in enumerate(ty_list):
 760             e = chr(ord('a') + idx)
 761             out_java.write("\tpublic static native " + ty_info.java_ty + " " + struct_name + "_get_" + e + "(long ptr);\n")
 762             write_c(consts.c_fn_ty_pfx + ty_info.c_ty + " " + consts.c_fn_name_define_pfx(struct_name + "_get_" + e, True) + consts.ptr_c_ty + " ptr) {\n")
 763             write_c("\t" + struct_name + " *tuple = (" + struct_name + "*)(ptr & ~1);\n")
 764             conv_info = type_mapping_generator.map_type_with_info(ty_info, False, None, False, True)
 765             if conv_info.ret_conv is not None:
 766                 write_c("\t" + conv_info.ret_conv[0].replace("\n", "\n\t") + "tuple->" + e + conv_info.ret_conv[1].replace("\n", "\n\t") + "\n")
 767                 write_c("\treturn " + conv_info.ret_conv_name + ";\n")
 768             else:
 769                 write_c("\treturn tuple->" + e + ";\n")
 770             write_c("}\n")
 771
 772     out_java.write(consts.bindings_header.replace('<git_version_ldk_garbagecollected>', local_git_version))
 773
 774     with open(f"{sys.argv[3]}/structs/CommonBase{consts.file_ext}", "w") as out_java_struct:
 775         out_java_struct.write(consts.common_base)
 776
 777     block_comment = None
 778     last_block_comment = None
 779     cur_block_obj = None
 780
 781     const_val_regex = re.compile("^extern const ([A-Za-z_0-9]*) ([A-Za-z_0-9]*);$")
 782
 783     line_indicates_result_regex = re.compile("^   union (LDKCResult_[A-Za-z_0-9]*Ptr) contents;$")
 784     line_indicates_vec_regex = re.compile("^   (struct |enum |union )?([A-Za-z_0-9]*) \*data;$")
 785     line_indicates_opaque_regex = re.compile("^   bool is_owned;$")
 786     line_indicates_trait_regex = re.compile("^   (struct |enum |union )?([A-Za-z_0-9]* \*?)\(\*([A-Za-z_0-9]*)\)\((const )?void \*this_arg(.*)\);$")
 787     assert(line_indicates_trait_regex.match("   uintptr_t (*send_data)(void *this_arg, LDKu8slice data, bool resume_read);"))
 788     assert(line_indicates_trait_regex.match("   struct LDKCVec_MessageSendEventZ (*get_and_clear_pending_msg_events)(const void *this_arg);"))
 789     assert(line_indicates_trait_regex.match("   struct LDKCVec_u8Z (*write)(const void *this_arg);"))
 790     line_indicates_trait_clone_regex = re.compile("^   void \(\*cloned\)\(struct ([A-Za-z0-9])* \*NONNULL_PTR new_[A-Za-z0-9]*\);$")
 791     assert(line_indicates_trait_clone_regex.match("   void (*cloned)(struct LDKSign *NONNULL_PTR new_Sign);"))
 792     line_field_var_regex = re.compile("^   struct ([A-Za-z_0-9]*) ([A-Za-z_0-9]*);$")
 793     assert(line_field_var_regex.match("   struct LDKMessageSendEventsProvider MessageSendEventsProvider;"))
 794     assert(line_field_var_regex.match("   struct LDKChannelPublicKeys pubkeys;"))
 795     struct_name_regex = re.compile("^typedef (struct|enum|union) (MUST_USE_STRUCT )?(LDK[A-Za-z_0-9]*) {$")
 796     assert(struct_name_regex.match("typedef struct LDKCVec_u8Z {"))
 797     assert(struct_name_regex.match("typedef enum LDKNetwork {"))
 798
 799     union_enum_items = {}
 800     result_ptr_struct_items = {}
 801     for line in in_h:
 802         if block_comment is not None:
 803             if line.endswith("*/\n"):
 804                 last_block_comment = block_comment.strip("\n")
 805                 block_comment = None
 806             else:
 807                 block_comment = block_comment + line.strip(" /*")
 808         elif cur_block_obj is not None:
 809             cur_block_obj  = cur_block_obj + line
 810             if line.startswith("} "):
 811                 field_lines = []
 812                 struct_name = None
 813                 vec_ty = None
 814                 obj_lines = cur_block_obj.split("\n")
 815                 is_opaque = False
 816                 result_contents = None
 817                 is_unitary_enum = False
 818                 is_union_enum = False
 819                 is_union = False
 820                 is_tuple = False
 821                 trait_fn_lines = []
 822                 field_var_lines = []
 823
 824                 for idx, struct_line in enumerate(obj_lines):
 825                     if struct_line.strip().startswith("/*"):
 826                         block_comment = struct_line.strip(" /*")
 827                     if block_comment is not None:
 828                         if struct_line.endswith("*/"):
 829                             last_struct_block_comment = block_comment.strip("\n")
 830                             block_comment = None
 831                         else:
 832                             block_comment = block_comment + "\n" + struct_line.strip(" /*")
 833                     else:
 834                         struct_name_match = struct_name_regex.match(struct_line)
 835                         if struct_name_match is not None:
 836                             struct_name = struct_name_match.group(3)
 837                             if struct_name_match.group(1) == "enum":
 838                                 if not struct_name.endswith("_Tag"):
 839                                     is_unitary_enum = True
 840                                 else:
 841                                     is_union_enum = True
 842                             elif struct_name_match.group(1) == "union":
 843                                 is_union = True
 844                         if line_indicates_opaque_regex.match(struct_line):
 845                             is_opaque = True
 846                         result_match = line_indicates_result_regex.match(struct_line)
 847                         if result_match is not None:
 848                             result_contents = result_match.group(1)
 849                         vec_ty_match = line_indicates_vec_regex.match(struct_line)
 850                         if vec_ty_match is not None and struct_name.startswith("LDKCVec_"):
 851                             vec_ty = vec_ty_match.group(2)
 852                         elif struct_name.startswith("LDKC2Tuple_") or struct_name.startswith("LDKC3Tuple_"):
 853                             is_tuple = True
 854                         trait_fn_match = line_indicates_trait_regex.match(struct_line)
 855                         if trait_fn_match is not None:
 856                             trait_fn_lines.append((last_struct_block_comment, trait_fn_match))
 857                         trait_clone_fn_match = line_indicates_trait_clone_regex.match(struct_line)
 858                         if trait_clone_fn_match is not None:
 859                             trait_fn_lines.append((last_struct_block_comment, "cloned"))
 860                         field_var_match = line_field_var_regex.match(struct_line)
 861                         if field_var_match is not None:
 862                             field_var_lines.append(field_var_match)
 863                         field_lines.append(struct_line)
 864
 865                 assert(struct_name is not None)
 866                 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))
 867                 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))
 868                 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))
 869                 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))
 870                 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))
 871                 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))
 872                 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))
 873
 874                 if is_opaque:
 875                     opaque_structs.add(struct_name)
 876                     with open(f"{sys.argv[3]}/structs/{struct_name.replace('LDK', '')}{consts.file_ext}", "w") as out_java_struct:
 877                         out_opaque_struct_human = consts.map_opaque_struct(struct_name, last_block_comment)
 878                         last_block_comment = None
 879                         out_java_struct.write(out_opaque_struct_human)
 880                 elif result_contents is not None:
 881                     assert result_contents in result_ptr_struct_items
 882                     res_ty, err_ty = result_ptr_struct_items[result_contents]
 883                     map_result(struct_name, res_ty, err_ty)
 884                 elif struct_name.startswith("LDKCResult_") and struct_name.endswith("ZPtr"):
 885                     for line in field_lines:
 886                         if line.endswith("*result;"):
 887                             res_ty = line[:-8].strip()
 888                         elif line.endswith("*err;"):
 889                             err_ty = line[:-5].strip()
 890                     result_ptr_struct_items[struct_name] = (res_ty, err_ty)
 891                     result_types.add(struct_name[:-3])
 892                 elif is_tuple:
 893                     map_tuple(struct_name, field_lines)
 894                 elif vec_ty is not None:
 895                     ty_info = type_mapping_generator.map_type(vec_ty + " arr_elem", False, None, False, False)
 896                     if len(ty_info.java_fn_ty_arg) == 1: # ie we're a primitive of some form
 897                         out_java.write("\tpublic static native long " + struct_name + "_new(" + ty_info.java_ty + "[] elems);\n")
 898                         write_c(consts.c_fn_ty_pfx + consts.ptr_c_ty + " " + consts.c_fn_name_define_pfx(struct_name + "_new", True) + ty_info.c_ty + "Array elems) {\n")
 899                         write_c("\t" + struct_name + " *ret = MALLOC(sizeof(" + struct_name + "), \"" + struct_name + "\");\n")
 900                         write_c("\tret->datalen = " + consts.get_native_arr_len_call[0] + "elems" + consts.get_native_arr_len_call[1] + ";\n")
 901                         write_c("\tif (ret->datalen == 0) {\n")
 902                         write_c("\t\tret->data = NULL;\n")
 903                         write_c("\t} else {\n")
 904                         write_c("\t\tret->data = MALLOC(sizeof(" + vec_ty + ") * ret->datalen, \"" + struct_name + " Data\");\n")
 905                         native_arr_ptr_call = consts.get_native_arr_ptr_call(ty_info.ty_info)
 906                         write_c("\t\t" + ty_info.c_ty + " *java_elems = " + native_arr_ptr_call[0] + "elems" + native_arr_ptr_call[1] + ";\n")
 907                         write_c("\t\tfor (size_t i = 0; i < ret->datalen; i++) {\n")
 908                         if ty_info.arg_conv is not None:
 909                             write_c("\t\t\t" + ty_info.c_ty + " arr_elem = java_elems[i];\n")
 910                             write_c("\t\t\t" + ty_info.arg_conv.replace("\n", "\n\t\t\t") + "\n")
 911                             write_c("\t\t\tret->data[i] = " + ty_info.arg_conv_name + ";\n")
 912                             assert ty_info.arg_conv_cleanup is None
 913                         else:
 914                             write_c("\t\t\tret->data[i] = java_elems[i];\n")
 915                         write_c("\t\t}\n")
 916                         cleanup = consts.release_native_arr_ptr_call(ty_info.ty_info, "elems", "java_elems")
 917                         if cleanup is not None:
 918                             write_c("\t\t" + cleanup + ";\n")
 919                         write_c("\t}\n")
 920                         write_c("\treturn (uint64_t)ret;\n")
 921                         write_c("}\n")
 922
 923                     if ty_info.is_native_primitive:
 924                         clone_fns.add(struct_name.replace("LDK", "") + "_clone")
 925                         write_c("static inline " + struct_name + " " + struct_name.replace("LDK", "") + "_clone(const " + struct_name + " *orig) {\n")
 926                         write_c("\t" + struct_name + " ret = { .data = MALLOC(sizeof(" + ty_info.c_ty + ") * orig->datalen, \"" + struct_name + " clone bytes\"), .datalen = orig->datalen };\n")
 927                         write_c("\tmemcpy(ret.data, orig->data, sizeof(" + ty_info.c_ty + ") * ret.datalen);\n")
 928                         write_c("\treturn ret;\n}\n")
 929                     elif (ty_info.rust_obj.replace("LDK", "") + "_clone") in clone_fns:
 930                         ty_name = "CVec_" + ty_info.rust_obj.replace("LDK", "") + "Z";
 931                         clone_fns.add(ty_name + "_clone")
 932                         write_c("static inline " + struct_name + " " + ty_name + "_clone(const " + struct_name + " *orig) {\n")
 933                         write_c("\t" + struct_name + " ret = { .data = MALLOC(sizeof(" + ty_info.rust_obj + ") * orig->datalen, \"" + struct_name + " clone bytes\"), .datalen = orig->datalen };\n")
 934                         write_c("\tfor (size_t i = 0; i < ret.datalen; i++) {\n")
 935                         write_c("\t\tret.data[i] = " + ty_info.rust_obj.replace("LDK", "") + "_clone(&orig->data[i]);\n")
 936                         write_c("\t}\n\treturn ret;\n}\n")
 937                 elif is_union_enum:
 938                     assert(struct_name.endswith("_Tag"))
 939                     struct_name = struct_name[:-4]
 940                     union_enum_items[struct_name] = {"field_lines": field_lines}
 941                 elif struct_name.endswith("_Body") and struct_name.split("_")[0] in union_enum_items:
 942                     enum_var_name = struct_name.split("_")
 943                     union_enum_items[enum_var_name[0]][enum_var_name[1]] = field_lines
 944                 elif struct_name in union_enum_items:
 945                     tuple_variants = {}
 946                     elem_items = -1
 947                     for line in field_lines:
 948                         if line == "      struct {":
 949                             elem_items = 0
 950                         elif line == "      };":
 951                             elem_items = -1
 952                         elif elem_items > -1:
 953                             line = line.strip()
 954                             if line.startswith("struct "):
 955                                 line = line[7:]
 956                             elif line.startswith("enum "):
 957                                 line = line[5:]
 958                             split = line.split(" ")
 959                             assert len(split) == 2
 960                             tuple_variants[split[1].strip(";")] = split[0]
 961                             elem_items += 1
 962                             if elem_items > 1:
 963                                 # We don't currently support tuple variant with more than one element
 964                                 assert False
 965                     map_complex_enum(struct_name, union_enum_items[struct_name], tuple_variants, last_block_comment)
 966                     last_block_comment = None
 967                 elif is_unitary_enum:
 968                     map_unitary_enum(struct_name, field_lines, last_block_comment)
 969                     last_block_comment = None
 970                 elif len(trait_fn_lines) > 0:
 971                     map_trait(struct_name, field_var_lines, trait_fn_lines, last_block_comment)
 972                 elif struct_name == "LDKTxOut":
 973                     with open(f"{sys.argv[3]}/structs/TxOut{consts.file_ext}", "w") as out_java_struct:
 974                         out_java_struct.write(consts.hu_struct_file_prefix)
 975                         out_java_struct.write("public class TxOut extends CommonBase{\n")
 976                         out_java_struct.write("\tTxOut(java.lang.Object _dummy, long ptr) { super(ptr); }\n")
 977                         out_java_struct.write("\tlong to_c_ptr() { return 0; }\n")
 978                         out_java_struct.write("\t@Override @SuppressWarnings(\"deprecation\")\n")
 979                         out_java_struct.write("\tprotected void finalize() throws Throwable {\n")
 980                         out_java_struct.write("\t\tsuper.finalize();\n")
 981                         out_java_struct.write("\t\tif (ptr != 0) { bindings.TxOut_free(ptr); }\n")
 982                         out_java_struct.write("\t}\n")
 983                         # TODO: TxOut body
 984                         out_java_struct.write("}")
 985                 else:
 986                     pass # Everything remaining is a byte[] or some form
 987                 cur_block_obj = None
 988         else:
 989             fn_ptr = fn_ptr_regex.match(line)
 990             fn_ret_arr = fn_ret_arr_regex.match(line)
 991             reg_fn = reg_fn_regex.match(line)
 992             const_val = const_val_regex.match(line)
 993
 994             if line.startswith("#include <"):
 995                 pass
 996             elif line.startswith("/*"):
 997                 if not line.endswith("*/\n"):
 998                     block_comment = line.strip(" /*")
 999             elif line.startswith("typedef enum "):
1000                 cur_block_obj = line
1001             elif line.startswith("typedef struct "):
1002                 cur_block_obj = line
1003             elif line.startswith("typedef union "):
1004                 cur_block_obj = line
1005             elif fn_ptr is not None:
1006                 map_fn(line, fn_ptr, None, None, last_block_comment)
1007                 last_block_comment = None
1008             elif fn_ret_arr is not None:
1009                 map_fn(line, fn_ret_arr, fn_ret_arr.group(4), None, last_block_comment)
1010                 last_block_comment = None
1011             elif reg_fn is not None:
1012                 map_fn(line, reg_fn, None, None, last_block_comment)
1013                 last_block_comment = None
1014             elif const_val_regex is not None:
1015                 # TODO Map const variables
1016                 pass
1017             else:
1018                 assert(line == "\n")
1019
1020     out_java.write(consts.bindings_footer)
1021     for struct_name in opaque_structs:
1022         with open(f"{sys.argv[3]}/structs/{struct_name.replace('LDK', '')}{consts.file_ext}", "a") as out_java_struct:
1023             out_java_struct.write("}\n")
1024     for struct_name in trait_structs:
1025         with open(f"{sys.argv[3]}/structs/{struct_name.replace('LDK', '')}{consts.file_ext}", "a") as out_java_struct:
1026             out_java_struct.write("}\n")
1027     for struct_name in complex_enums:
1028         with open(f"{sys.argv[3]}/structs/{struct_name.replace('LDK', '').replace('COption', 'Option')}{consts.file_ext}", "a") as out_java_struct:
1029             out_java_struct.write("}\n")
1030     for struct_name in result_types:
1031         with open(f"{sys.argv[3]}/structs/{struct_name.replace('LDKCResult', 'Result')}{consts.file_ext}", "a") as out_java_struct:
1032             out_java_struct.write("}\n")
1033
1034 with open(sys.argv[4], "w") as out_c:
1035     out_c.write(consts.c_file_pfx.replace('<git_version_ldk_garbagecollected>', local_git_version))
1036     out_c.write(consts.init_str())
1037     out_c.write(c_file)
1038 with open(f"{sys.argv[3]}/structs/UtilMethods{consts.file_ext}", "a") as util:
1039     util.write(consts.util_fn_sfx)