_ 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_field_nullable(doc):
  74     if doc is None:
  75         return False
  76     for line in doc.splitlines():
  77         if "Note that this (or a relevant inner pointer) may be NULL or all-0s to represent None" in line:
  78             return True
  79     return False
  80
  81 def doc_to_params_ret_nullable(doc):
  82     if doc is None:
  83         return (set(), False)
  84     params = set()
  85     ret_null = False
  86     for line in doc.splitlines():
  87         if "may be NULL or all-0s to represent None" not in line:
  88             continue
  89         if "Note that the return value" in line:
  90             ret_null = True
  91         elif "Note that " in line:
  92             param = line.split("Note that ")[1].split(" ")[0]
  93             params.add(param)
  94     return (params, ret_null)
  95
  96 unitary_enums = set()
  97 complex_enums = set()
  98 opaque_structs = set()
  99 trait_structs = {}
 100 result_types = set()
 101 tuple_types = {}
 102
 103 var_is_arr_regex = re.compile("\(\*([A-za-z0-9_]*)\)\[([a-z0-9]*)\]")
 104 var_ty_regex = re.compile("([A-za-z_0-9]*)(.*)")
 105 java_c_types_none_allowed = True # Unset when we do the real pass that populates the above sets
 106 def java_c_types(fn_arg, ret_arr_len):
 107     fn_arg = fn_arg.strip()
 108     if fn_arg.startswith("MUST_USE_RES "):
 109         fn_arg = fn_arg[13:]
 110     is_const = False
 111     if fn_arg.startswith("const "):
 112         fn_arg = fn_arg[6:]
 113         is_const = True
 114     if fn_arg.startswith("struct "):
 115         fn_arg = fn_arg[7:]
 116     if fn_arg.startswith("enum "):
 117         fn_arg = fn_arg[5:]
 118     nonnull_ptr = "NONNULL_PTR" in fn_arg
 119     fn_arg = fn_arg.replace("NONNULL_PTR", "")
 120
 121     is_ptr = False
 122     take_by_ptr = False
 123     rust_obj = None
 124     arr_access = None
 125     java_hu_ty = None
 126     if fn_arg.startswith("LDKThirtyTwoBytes"):
 127         fn_arg = "uint8_t (*" + fn_arg[18:] + ")[32]"
 128         assert var_is_arr_regex.match(fn_arg[8:])
 129         rust_obj = "LDKThirtyTwoBytes"
 130         arr_access = "data"
 131     elif fn_arg.startswith("LDKTxid"):
 132         fn_arg = "uint8_t (*" + fn_arg[8:] + ")[32]"
 133         assert var_is_arr_regex.match(fn_arg[8:])
 134         rust_obj = "LDKThirtyTwoBytes"
 135         arr_access = "data"
 136     elif fn_arg.startswith("LDKPublicKey"):
 137         fn_arg = "uint8_t (*" + fn_arg[13:] + ")[33]"
 138         assert var_is_arr_regex.match(fn_arg[8:])
 139         rust_obj = "LDKPublicKey"
 140         arr_access = "compressed_form"
 141     elif fn_arg.startswith("LDKSecretKey"):
 142         fn_arg = "uint8_t (*" + fn_arg[13:] + ")[32]"
 143         assert var_is_arr_regex.match(fn_arg[8:])
 144         rust_obj = "LDKSecretKey"
 145         arr_access = "bytes"
 146     elif fn_arg.startswith("LDKSignature"):
 147         fn_arg = "uint8_t (*" + fn_arg[13:] + ")[64]"
 148         assert var_is_arr_regex.match(fn_arg[8:])
 149         rust_obj = "LDKSignature"
 150         arr_access = "compact_form"
 151     elif fn_arg.startswith("LDKRecoverableSignature"):
 152         fn_arg = "uint8_t (*" + fn_arg[25:] + ")[68]"
 153         assert var_is_arr_regex.match(fn_arg[8:])
 154         rust_obj = "LDKRecoverableSignature"
 155         arr_access = "serialized_form"
 156     elif fn_arg.startswith("LDKThreeBytes"):
 157         fn_arg = "uint8_t (*" + fn_arg[14:] + ")[3]"
 158         assert var_is_arr_regex.match(fn_arg[8:])
 159         rust_obj = "LDKThreeBytes"
 160         arr_access = "data"
 161     elif fn_arg.startswith("LDKFourBytes"):
 162         fn_arg = "uint8_t (*" + fn_arg[13:] + ")[4]"
 163         assert var_is_arr_regex.match(fn_arg[8:])
 164         rust_obj = "LDKFourBytes"
 165         arr_access = "data"
 166     elif fn_arg.startswith("LDKSixteenBytes"):
 167         fn_arg = "uint8_t (*" + fn_arg[16:] + ")[16]"
 168         assert var_is_arr_regex.match(fn_arg[8:])
 169         rust_obj = "LDKSixteenBytes"
 170         arr_access = "data"
 171     elif fn_arg.startswith("LDKTwentyBytes"):
 172         fn_arg = "uint8_t (*" + fn_arg[15:] + ")[20]"
 173         assert var_is_arr_regex.match(fn_arg[8:])
 174         rust_obj = "LDKTwentyBytes"
 175         arr_access = "data"
 176     elif fn_arg.startswith("LDKTenBytes"):
 177         fn_arg = "uint8_t (*" + fn_arg[12:] + ")[10]"
 178         assert var_is_arr_regex.match(fn_arg[8:])
 179         rust_obj = "LDKTenBytes"
 180         arr_access = "data"
 181     elif fn_arg.startswith("LDKu8slice"):
 182         fn_arg = "uint8_t (*" + fn_arg[11:] + ")[datalen]"
 183         assert var_is_arr_regex.match(fn_arg[8:])
 184         rust_obj = "LDKu8slice"
 185         arr_access = "data"
 186     elif fn_arg.startswith("LDKCVec_u8Z"):
 187         fn_arg = "uint8_t (*" + fn_arg[12:] + ")[datalen]"
 188         rust_obj = "LDKCVec_u8Z"
 189         assert var_is_arr_regex.match(fn_arg[8:])
 190         arr_access = "data"
 191     elif fn_arg.startswith("LDKTransaction ") or fn_arg == "LDKTransaction":
 192         fn_arg = "uint8_t (*" + fn_arg[15:] + ")[datalen]"
 193         rust_obj = "LDKTransaction"
 194         assert var_is_arr_regex.match(fn_arg[8:])
 195         arr_access = "data"
 196     elif fn_arg.startswith("LDKCVec_"):
 197         is_ptr = False
 198         if "*" in fn_arg:
 199             fn_arg = fn_arg.replace("*", "")
 200             is_ptr = True
 201
 202         tyn = fn_arg[8:].split(" ")
 203         assert tyn[0].endswith("Z")
 204         if tyn[0] == "u64Z":
 205             new_arg = "uint64_t"
 206         else:
 207             new_arg = "LDK" + tyn[0][:-1]
 208         for a in tyn[1:]:
 209             new_arg = new_arg + " " + a
 210         res = java_c_types(new_arg, ret_arr_len)
 211         if res is None:
 212             assert java_c_types_none_allowed
 213             return None
 214         if is_ptr:
 215             res.pass_by_ref = True
 216         if res.is_native_primitive or res.passed_as_ptr:
 217             return TypeInfo(rust_obj=fn_arg.split(" ")[0], java_ty=res.java_ty + "[]", java_hu_ty=res.java_hu_ty + "[]",
 218                 java_fn_ty_arg="[" + res.java_fn_ty_arg, c_ty=res.c_ty + "Array", passed_as_ptr=False, is_ptr=is_ptr,
 219                 nonnull_ptr=nonnull_ptr, is_const=is_const,
 220                 var_name=res.var_name, arr_len="datalen", arr_access="data", subty=res, is_native_primitive=False)
 221         else:
 222             return TypeInfo(rust_obj=fn_arg.split(" ")[0], java_ty=res.java_ty + "[]", java_hu_ty=res.java_hu_ty + "[]",
 223                 java_fn_ty_arg="[" + res.java_fn_ty_arg, c_ty=consts.ptr_arr, passed_as_ptr=False, is_ptr=is_ptr,
 224                 nonnull_ptr=nonnull_ptr, is_const=is_const,
 225                 var_name=res.var_name, arr_len="datalen", arr_access="data", subty=res, is_native_primitive=False)
 226
 227     is_primitive = False
 228     arr_len = None
 229     mapped_type = []
 230     java_type_plural = None
 231     if fn_arg.startswith("void"):
 232         java_ty = "void"
 233         c_ty = "void"
 234         fn_ty_arg = "V"
 235         fn_arg = fn_arg[4:].strip()
 236         is_primitive = True
 237     elif fn_arg.startswith("bool"):
 238         java_ty = "boolean"
 239         c_ty = "jboolean"
 240         fn_ty_arg = "Z"
 241         fn_arg = fn_arg[4:].strip()
 242         is_primitive = True
 243     elif fn_arg.startswith("uint8_t"):
 244         mapped_type = consts.c_type_map['uint8_t']
 245         java_ty = mapped_type[0]
 246         c_ty = "int8_t"
 247         fn_ty_arg = "B"
 248         fn_arg = fn_arg[7:].strip()
 249         is_primitive = True
 250     elif fn_arg.startswith("LDKu5"):
 251         java_ty = consts.c_type_map['uint8_t'][0]
 252         java_hu_ty = "UInt5"
 253         rust_obj = "LDKu5"
 254         c_ty = "int8_t"
 255         fn_ty_arg = "B"
 256         fn_arg = fn_arg[6:].strip()
 257     elif fn_arg.startswith("uint16_t"):
 258         mapped_type = consts.c_type_map['uint16_t']
 259         java_ty = mapped_type[0]
 260         c_ty = "int16_t"
 261         fn_ty_arg = "S"
 262         fn_arg = fn_arg[8:].strip()
 263         is_primitive = True
 264     elif fn_arg.startswith("uint32_t"):
 265         mapped_type = consts.c_type_map['uint32_t']
 266         java_ty = mapped_type[0]
 267         c_ty = "int32_t"
 268         fn_ty_arg = "I"
 269         fn_arg = fn_arg[8:].strip()
 270         is_primitive = True
 271     elif fn_arg.startswith("uint64_t") or fn_arg.startswith("uintptr_t"):
 272         # TODO: uintptr_t is arch-dependent :(
 273         mapped_type = consts.c_type_map['uint64_t']
 274         java_ty = mapped_type[0]
 275         fn_ty_arg = "J"
 276         if fn_arg.startswith("uint64_t"):
 277             c_ty = "int64_t"
 278             fn_arg = fn_arg[8:].strip()
 279         else:
 280             c_ty = "int64_t"
 281             rust_obj = "uintptr_t"
 282             fn_arg = fn_arg[9:].strip()
 283         is_primitive = True
 284     elif is_const and fn_arg.startswith("char *"):
 285         java_ty = "String"
 286         c_ty = "const char*"
 287         fn_ty_arg = "Ljava/lang/String;"
 288         fn_arg = fn_arg[6:].strip()
 289     elif fn_arg.startswith("LDKStr"):
 290         rust_obj = "LDKStr"
 291         java_ty = "String"
 292         c_ty = "jstring"
 293         fn_ty_arg = "Ljava/lang/String;"
 294         fn_arg = fn_arg[6:].strip()
 295         arr_access = "chars"
 296         arr_len = "len"
 297     else:
 298         ma = var_ty_regex.match(fn_arg)
 299         if ma.group(1).strip() in unitary_enums:
 300             assert ma.group(1).strip().startswith("LDK")
 301             java_ty = ma.group(1).strip()[3:]
 302             java_hu_ty = java_ty
 303             c_ty = consts.result_c_ty
 304             fn_ty_arg = "Lorg/ldk/enums/" + java_ty + ";"
 305             fn_arg = ma.group(2).strip()
 306             rust_obj = ma.group(1).strip()
 307         elif ma.group(1).strip().startswith("LDKC2Tuple"):
 308             c_ty = consts.ptr_c_ty
 309             java_ty = consts.ptr_native_ty
 310             java_hu_ty = "TwoTuple<"
 311             if not ma.group(1).strip() in tuple_types:
 312                 assert java_c_types_none_allowed
 313                 return None
 314             for idx, ty_info in enumerate(tuple_types[ma.group(1).strip()][0]):
 315                 if idx != 0:
 316                     java_hu_ty = java_hu_ty + ", "
 317                 if ty_info.is_native_primitive:
 318                     if ty_info.java_hu_ty == "int":
 319                         java_hu_ty = java_hu_ty + "Integer" # Java concrete integer type is Integer, not Int
 320                     else:
 321                         java_hu_ty = java_hu_ty + ty_info.java_hu_ty.title() # If we're a primitive, capitalize the first letter
 322                 else:
 323                     java_hu_ty = java_hu_ty + ty_info.java_hu_ty
 324             java_hu_ty = java_hu_ty + ">"
 325             fn_ty_arg = "J"
 326             fn_arg = ma.group(2).strip()
 327             rust_obj = ma.group(1).strip()
 328             take_by_ptr = True
 329         elif ma.group(1).strip().startswith("LDKC3Tuple"):
 330             c_ty = consts.ptr_c_ty
 331             java_ty = consts.ptr_native_ty
 332             java_hu_ty = "ThreeTuple<"
 333             if not ma.group(1).strip() in tuple_types:
 334                 assert java_c_types_none_allowed
 335                 return None
 336             for idx, ty_info in enumerate(tuple_types[ma.group(1).strip()][0]):
 337                 if idx != 0:
 338                     java_hu_ty = java_hu_ty + ", "
 339                 if ty_info.is_native_primitive:
 340                     if ty_info.java_hu_ty == "int":
 341                         java_hu_ty = java_hu_ty + "Integer" # Java concrete integer type is Integer, not Int
 342                     else:
 343                         java_hu_ty = java_hu_ty + ty_info.java_hu_ty.title() # If we're a primitive, capitalize the first letter
 344                 else:
 345                     java_hu_ty = java_hu_ty + ty_info.java_hu_ty
 346             java_hu_ty = java_hu_ty + ">"
 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         else:
 352             c_ty = consts.ptr_c_ty
 353             java_ty = consts.ptr_native_ty
 354             java_hu_ty = ma.group(1).strip().replace("LDKCOption", "Option").replace("LDKCResult", "Result").replace("LDK", "")
 355             fn_ty_arg = "J"
 356             fn_arg = ma.group(2).strip()
 357             rust_obj = ma.group(1).strip()
 358             take_by_ptr = True
 359
 360     if fn_arg.startswith(" *") or fn_arg.startswith("*"):
 361         fn_arg = fn_arg.replace("*", "").strip()
 362         is_ptr = True
 363         c_ty = consts.ptr_c_ty
 364         java_ty = consts.ptr_native_ty
 365         fn_ty_arg = "J"
 366
 367     var_is_arr = var_is_arr_regex.match(fn_arg)
 368     if var_is_arr is not None or ret_arr_len is not None:
 369         assert(not take_by_ptr)
 370         assert(not is_ptr)
 371         # is there a special case for plurals?
 372         if len(mapped_type) == 2:
 373             java_ty = mapped_type[1]
 374         else:
 375             java_ty = java_ty + "[]"
 376         c_ty = c_ty + "Array"
 377         if var_is_arr is not None:
 378             if var_is_arr.group(1) == "":
 379                 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,
 380                     passed_as_ptr=False, is_ptr=False, nonnull_ptr=nonnull_ptr, var_name="arg",
 381                     arr_len=var_is_arr.group(2), arr_access=arr_access, is_native_primitive=False)
 382             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,
 383                 passed_as_ptr=False, is_ptr=False, nonnull_ptr=nonnull_ptr, var_name=var_is_arr.group(1),
 384                 arr_len=var_is_arr.group(2), arr_access=arr_access, is_native_primitive=False)
 385
 386     if java_hu_ty is None:
 387         java_hu_ty = java_ty
 388     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,
 389         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)
 390
 391 fn_ptr_regex = re.compile("^extern const ([A-Za-z_0-9\* ]*) \(\*(.*)\)\((.*)\);$")
 392 fn_ret_arr_regex = re.compile("(.*) \(\*(.*)\((.*)\)\)\[([0-9]*)\];$")
 393 reg_fn_regex = re.compile("([A-Za-z_0-9\* ]* \*?)([a-zA-Z_0-9]*)\((.*)\);$")
 394 clone_fns = set()
 395 constructor_fns = {}
 396
 397 from gen_type_mapping import TypeMappingGenerator
 398 type_mapping_generator = TypeMappingGenerator(java_c_types, consts, opaque_structs, clone_fns, unitary_enums, trait_structs, complex_enums, result_types, tuple_types)
 399
 400 with open(sys.argv[1]) as in_h:
 401     for line in in_h:
 402         reg_fn = reg_fn_regex.match(line)
 403         if reg_fn is not None:
 404             if reg_fn.group(2).endswith("_clone"):
 405                 clone_fns.add(reg_fn.group(2))
 406             else:
 407                 rty = java_c_types(reg_fn.group(1), None)
 408                 if rty is not None and not rty.is_native_primitive and reg_fn.group(2) == rty.java_hu_ty + "_new":
 409                     constructor_fns[rty.rust_obj] = reg_fn.group(3)
 410             continue
 411         arr_fn = fn_ret_arr_regex.match(line)
 412         if arr_fn is not None:
 413             if arr_fn.group(2).endswith("_clone"):
 414                 clone_fns.add(arr_fn.group(2))
 415             # No object constructors return arrays, as then they wouldn't be an object constructor
 416             continue
 417
 418 # Define some manual clones...
 419 clone_fns.add("ThirtyTwoBytes_clone")
 420 write_c("static inline struct LDKThirtyTwoBytes ThirtyTwoBytes_clone(const struct LDKThirtyTwoBytes *orig) { struct LDKThirtyTwoBytes ret; memcpy(ret.data, orig->data, 32); return ret; }\n")
 421
 422 java_c_types_none_allowed = False # C structs created by cbindgen are declared in dependency order
 423
 424 with open(f"{sys.argv[3]}/structs/UtilMethods{consts.file_ext}", "a") as util:
 425     util.write(consts.util_fn_pfx)
 426
 427 with open(sys.argv[1]) as in_h, open(sys.argv[2], "w") as out_java:
 428     # Map a top-level function
 429     def map_fn(line, re_match, ret_arr_len, c_call_string, doc_comment):
 430         method_return_type = re_match.group(1)
 431         method_name = re_match.group(2)
 432         orig_method_name = str(method_name)
 433         method_comma_separated_arguments = re_match.group(3)
 434         method_arguments = method_comma_separated_arguments.split(',')
 435
 436         is_free = method_name.endswith("_free")
 437         if method_name.startswith("COption") or method_name.startswith("CResult"):
 438             struct_meth = method_name.rsplit("Z", 1)[0][1:] + "Z"
 439         else:
 440             struct_meth = method_name.split("_")[0]
 441
 442         return_type_info = type_mapping_generator.map_type(method_return_type.strip() + " ret", True, ret_arr_len, False, False)
 443
 444         (params_nullable, ret_nullable) = doc_to_params_ret_nullable(doc_comment)
 445         if ret_nullable:
 446             return_type_info.nullable = True
 447
 448         argument_types = []
 449         default_constructor_args = {}
 450         takes_self = False
 451         takes_self_ptr = False
 452         args_known = True
 453
 454         for argument_index, argument in enumerate(method_arguments):
 455             argument_conversion_info = type_mapping_generator.map_type(argument, False, None, is_free, True)
 456             if argument_index == 0 and argument_conversion_info.java_hu_ty == struct_meth:
 457                 takes_self = True
 458                 if argument_conversion_info.ty_info.is_ptr:
 459                     takes_self_ptr = True
 460             elif argument_conversion_info.arg_name in params_nullable:
 461                 argument_conversion_info.nullable = True
 462             if argument_conversion_info.arg_conv is not None and "Warning" in argument_conversion_info.arg_conv:
 463                 assert not argument_conversion_info.arg_name in params_nullable
 464                 if argument_conversion_info.rust_obj in constructor_fns:
 465                     assert not is_free
 466                     for explode_arg in constructor_fns[argument_conversion_info.rust_obj].split(','):
 467                         explode_arg_conv = type_mapping_generator.map_type(explode_arg, False, None, False, True)
 468                         if explode_arg_conv.c_ty == "void":
 469                             # We actually want to handle this case, but for now its only used in NetGraphMsgHandler::new()
 470                             # which ends up resulting in a redundant constructor - both without arguments for the NetworkGraph.
 471                             args_known = False
 472                             pass
 473                         if not argument_conversion_info.arg_name in default_constructor_args:
 474                             default_constructor_args[argument_conversion_info.arg_name] = []
 475                         default_constructor_args[argument_conversion_info.arg_name].append(explode_arg_conv)
 476             argument_types.append(argument_conversion_info)
 477         if not takes_self and return_type_info.java_hu_ty != struct_meth:
 478             if not return_type_info.java_hu_ty.startswith("Result_" + struct_meth):
 479                 method_name = orig_method_name
 480                 struct_meth = ""
 481
 482         out_java.write("\t// " + line)
 483         (out_java_delta, out_c_delta, out_java_struct_delta) = \
 484             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)
 485         out_java.write(out_java_delta)
 486
 487         if is_free:
 488             assert len(argument_types) == 1
 489             assert return_type_info.c_ty == "void"
 490             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")
 491             if argument_types[0].ty_info.passed_as_ptr and not argument_types[0].ty_info.rust_obj in opaque_structs:
 492                 write_c("\tif ((" + argument_types[0].ty_info.var_name + " & 1) != 0) return;\n")
 493
 494             for info in argument_types:
 495                 if info.arg_conv is not None:
 496                     write_c("\t" + info.arg_conv.replace('\n', "\n\t") + "\n")
 497             assert c_call_string is None
 498             write_c("\t" + method_name + "(")
 499             if argument_types[0].arg_conv_name is not None:
 500                 write_c(argument_types[0].arg_conv_name)
 501             write_c(");")
 502             for info in argument_types:
 503                 if info.arg_conv_cleanup is not None:
 504                     write_c("\n\t" + info.arg_conv_cleanup.replace("\n", "\n\t"))
 505             write_c("\n}\n\n")
 506         else:
 507             write_c(out_c_delta)
 508
 509         out_java_struct = None
 510         expected_struct = "LDK" + struct_meth
 511         expected_cstruct = "LDKC" + struct_meth
 512         if (expected_struct in opaque_structs or expected_struct in trait_structs
 513                 or expected_struct in complex_enums or expected_cstruct in complex_enums
 514                 or expected_cstruct in result_types) and not is_free:
 515             out_java_struct = open(f"{sys.argv[3]}/structs/{struct_meth}{consts.file_ext}", "a")
 516             out_java_struct.write(out_java_struct_delta)
 517         elif (not is_free and not method_name.endswith("_clone") and
 518                 not method_name.startswith("_") and
 519                 method_name != "check_platform" and method_name != "Result_read" and
 520                 not expected_struct in unitary_enums and
 521                 ((not method_name.startswith("C2Tuple_") and not method_name.startswith("C3Tuple_"))
 522                   or method_name.endswith("_read"))):
 523             out_java_struct = open(f"{sys.argv[3]}/structs/UtilMethods{consts.file_ext}", "a")
 524             for line in out_java_struct_delta.splitlines():
 525                 if not line.strip().startswith("this."):
 526                     out_java_struct.write(line + "\n")
 527                 else:
 528                     out_java_struct.write("\t\t// " + line.strip() + "\n")
 529
 530     def map_unitary_enum(struct_name, field_lines, enum_doc_comment):
 531         assert struct_name.startswith("LDK")
 532         with open(f"{sys.argv[3]}/enums/{struct_name[3:]}{consts.file_ext}", "w") as out_java_enum:
 533             unitary_enums.add(struct_name)
 534             for idx, (struct_line, _) in enumerate(field_lines):
 535                 if idx == 0:
 536                     assert(struct_line == "typedef enum %s {" % struct_name)
 537                 elif idx == len(field_lines) - 3:
 538                     assert(struct_line.endswith("_Sentinel,"))
 539                 elif idx == len(field_lines) - 2:
 540                     assert(struct_line == "} %s;" % struct_name)
 541                 elif idx == len(field_lines) - 1:
 542                     assert(struct_line == "")
 543             assert struct_name.startswith("LDK")
 544             (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)
 545             write_c(c_out)
 546             out_java_enum.write(native_file_out)
 547             out_java.write(native_out)
 548
 549     def map_complex_enum(struct_name, union_enum_items, inline_enum_variants, enum_doc_comment):
 550         java_hu_type = struct_name.replace("LDK", "").replace("COption", "Option")
 551         complex_enums.add(struct_name)
 552
 553         enum_variants = []
 554         tag_field_lines = union_enum_items["field_lines"]
 555         for idx, (struct_line, _) in enumerate(tag_field_lines):
 556             if idx == 0:
 557                 assert(struct_line == "typedef enum %s_Tag {" % struct_name)
 558             elif idx == len(tag_field_lines) - 3:
 559                 assert(struct_line.endswith("_Sentinel,"))
 560             elif idx == len(tag_field_lines) - 2:
 561                 assert(struct_line == "} %s_Tag;" % struct_name)
 562             elif idx == len(tag_field_lines) - 1:
 563                 assert(struct_line == "")
 564             else:
 565                 variant_name = struct_line.strip(' ,')[len(struct_name) + 1:]
 566                 fields = []
 567                 if "LDK" + variant_name in union_enum_items:
 568                     enum_var_lines = union_enum_items["LDK" + variant_name]
 569                     for idx, (field, field_docs) in enumerate(enum_var_lines):
 570                         if idx != 0 and idx < len(enum_var_lines) - 2 and field.strip() != "":
 571                             field_ty = type_mapping_generator.map_type(field.strip(' ;'), False, None, False, True)
 572                             if field_docs is not None and doc_to_field_nullable(field_docs):
 573                                 field_ty.nullable = True
 574                             fields.append((field_ty, field_docs))
 575                     enum_variants.append(ComplexEnumVariantInfo(variant_name, fields, False))
 576                 elif camel_to_snake(variant_name) in inline_enum_variants:
 577                     # TODO: If we ever have a rust enum Variant(Option<Struct>) we need to pipe
 578                     # docs through to there, and then potentially mark the field nullable.
 579                     fields.append((type_mapping_generator.map_type(inline_enum_variants[camel_to_snake(variant_name)] + " " + camel_to_snake(variant_name), False, None, False, True), None))
 580                     enum_variants.append(ComplexEnumVariantInfo(variant_name, fields, True))
 581                 else:
 582                     enum_variants.append(ComplexEnumVariantInfo(variant_name, fields, True))
 583
 584         with open(f"{sys.argv[3]}/structs/{java_hu_type}{consts.file_ext}", "w") as out_java_enum:
 585             (out_java_addendum, out_java_enum_addendum, out_c_addendum) = consts.map_complex_enum(struct_name, enum_variants, camel_to_snake, enum_doc_comment)
 586
 587             out_java_enum.write(out_java_enum_addendum)
 588             out_java.write(out_java_addendum)
 589             write_c(out_c_addendum)
 590
 591     def map_trait(struct_name, field_var_lines, trait_fn_lines, trait_doc_comment):
 592         with open(f"{sys.argv[3]}/structs/{struct_name.replace('LDK', '')}{consts.file_ext}", "w") as out_java_trait:
 593             field_var_convs = []
 594             flattened_field_var_convs = []
 595             for var_line in field_var_lines:
 596                 if var_line.group(1) in trait_structs:
 597                     field_var_convs.append((var_line.group(1), var_line.group(2), trait_structs[var_line.group(1)]))
 598                     flattened_field_var_convs.append((var_line.group(1), var_line.group(2), ))
 599                     flattened_field_var_convs.extend(trait_structs[var_line.group(1)])
 600                 else:
 601                     mapped = type_mapping_generator.map_type(var_line.group(1) + " " + var_line.group(2), False, None, False, False)
 602                     field_var_convs.append(mapped)
 603                     flattened_field_var_convs.append(mapped)
 604             trait_structs[struct_name] = field_var_convs
 605
 606             field_fns = []
 607             for fn_docs, fn_line in trait_fn_lines:
 608                 if fn_line == "cloned":
 609                     ret_ty_info = type_mapping_generator.map_type("void", True, None, False, False)
 610                     field_fns.append(TraitMethInfo("cloned", False, ret_ty_info, [], fn_docs))
 611                 else:
 612                     ret_ty_info = type_mapping_generator.map_type(fn_line.group(2).strip() + " ret", True, None, False, False)
 613                     is_const = fn_line.group(4) is not None
 614                     (nullable_params, ret_nullable) = doc_to_params_ret_nullable(fn_docs)
 615                     if ret_nullable:
 616                         assert False # This isn't yet handled on the Java side
 617                         ret_ty_info.nullable = True
 618
 619                     arg_tys = []
 620                     for idx, arg in enumerate(fn_line.group(5).split(',')):
 621                         if arg == "":
 622                             continue
 623                         arg_conv_info = type_mapping_generator.map_type(arg, True, None, False, False)
 624                         if arg_conv_info.arg_name in nullable_params:
 625                             # Types that are actually null instead of all-0s aren't yet handled on the Java side:
 626                             assert arg_conv_info.rust_obj == "LDKPublicKey"
 627                             arg_conv_info.nullable = True
 628                         arg_tys.append(arg_conv_info)
 629                     field_fns.append(TraitMethInfo(fn_line.group(3), is_const, ret_ty_info, arg_tys, fn_docs))
 630
 631             (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)
 632             write_c(out_c_addendum)
 633             out_java_trait.write(out_java_trait_addendum)
 634             out_java.write(out_java_addendum)
 635
 636         for fn_docs, fn_line in trait_fn_lines:
 637             if fn_line == "cloned":
 638                 continue
 639             # For now, just disable enabling the _call_log - we don't know how to inverse-map String
 640             is_log = fn_line.group(3) == "log" and struct_name == "LDKLogger"
 641             if fn_line.group(3) != "free" and fn_line.group(3) != "eq" and not is_log:
 642                 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"
 643                 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)
 644         for idx, var_line in enumerate(field_var_lines):
 645             if var_line.group(1) not in trait_structs:
 646                 write_c(var_line.group(1) + " " + struct_name + "_set_get_" + var_line.group(2) + "(" + struct_name + "* this_arg) {\n")
 647                 write_c("\tif (this_arg->set_" + var_line.group(2) + " != NULL)\n")
 648                 write_c("\t\tthis_arg->set_" + var_line.group(2) + "(this_arg);\n")
 649                 write_c("\treturn this_arg->" + var_line.group(2) + ";\n")
 650                 write_c("}\n")
 651                 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"
 652                 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)
 653
 654     def map_result(struct_name, res_ty, err_ty):
 655         result_types.add(struct_name)
 656         human_ty = struct_name.replace("LDKCResult", "Result")
 657         with open(f"{sys.argv[3]}/structs/{human_ty}{consts.file_ext}", "w") as out_java_struct:
 658             out_java_struct.write(consts.hu_struct_file_prefix)
 659             out_java_struct.write("public class " + human_ty + " extends CommonBase {\n")
 660             out_java_struct.write("\tprivate " + human_ty + "(Object _dummy, long ptr) { super(ptr); }\n")
 661             out_java_struct.write("\tprotected void finalize() throws Throwable {\n")
 662             out_java_struct.write("\t\tif (ptr != 0) { bindings." + struct_name.replace("LDK","") + "_free(ptr); } super.finalize();\n")
 663             out_java_struct.write("\t}\n\n")
 664             out_java_struct.write("\tstatic " + human_ty + " constr_from_ptr(long ptr) {\n")
 665             out_java_struct.write("\t\tif (bindings." + struct_name + "_result_ok(ptr)) {\n")
 666             out_java_struct.write("\t\t\treturn new " + human_ty + "_OK(null, ptr);\n")
 667             out_java_struct.write("\t\t} else {\n")
 668             out_java_struct.write("\t\t\treturn new " + human_ty + "_Err(null, ptr);\n")
 669             out_java_struct.write("\t\t}\n")
 670             out_java_struct.write("\t}\n")
 671
 672             res_map = type_mapping_generator.map_type(res_ty + " res", True, None, False, True)
 673             err_map = type_mapping_generator.map_type(err_ty + " err", True, None, False, True)
 674             can_clone = True
 675             if not res_map.is_native_primitive and (res_map.rust_obj.replace("LDK", "") + "_clone" not in clone_fns):
 676                 can_clone = False
 677             if not err_map.is_native_primitive and (err_map.rust_obj.replace("LDK", "") + "_clone" not in clone_fns):
 678                 can_clone = False
 679
 680             out_java.write("\tpublic static native boolean " + struct_name + "_result_ok(long arg);\n")
 681             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")
 682             write_c("\treturn ((" + struct_name + "*)arg)->result_ok;\n")
 683             write_c("}\n")
 684
 685             out_java.write("\tpublic static native " + res_map.java_ty + " " + struct_name + "_get_ok(long arg);\n")
 686             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")
 687             write_c("\t" + struct_name + " *val = (" + struct_name + "*)(arg & ~1);\n")
 688             write_c("\tCHECK(val->result_ok);\n\t")
 689             out_java_struct.write("\tpublic static final class " + human_ty + "_OK extends " + human_ty + " {\n")
 690             if res_map.ret_conv is not None:
 691                 write_c(res_map.ret_conv[0].replace("\n", "\n\t") + "(*val->contents.result)")
 692                 write_c(res_map.ret_conv[1].replace("\n", "\n\t") + "\n\treturn " + res_map.ret_conv_name)
 693             else:
 694                 write_c("return *val->contents.result")
 695             write_c(";\n}\n")
 696
 697             if res_map.java_hu_ty != "void":
 698                 out_java_struct.write("\t\tpublic final " + res_map.java_hu_ty + " res;\n")
 699             out_java_struct.write("\t\tprivate " + human_ty + "_OK(Object _dummy, long ptr) {\n")
 700             out_java_struct.write("\t\t\tsuper(_dummy, ptr);\n")
 701             if res_map.java_hu_ty == "void":
 702                 pass
 703             elif res_map.to_hu_conv is not None:
 704                 out_java_struct.write("\t\t\t" + res_map.java_ty + " res = bindings." + struct_name + "_get_ok(ptr);\n")
 705                 out_java_struct.write("\t\t\t" + res_map.to_hu_conv.replace("\n", "\n\t\t\t"))
 706                 out_java_struct.write("\n\t\t\tthis.res = " + res_map.to_hu_conv_name + ";\n")
 707             else:
 708                 out_java_struct.write("\t\t\tthis.res = bindings." + struct_name + "_get_ok(ptr);\n")
 709             out_java_struct.write("\t\t}\n")
 710             out_java_struct.write("\t}\n\n")
 711
 712             out_java.write("\tpublic static native " + err_map.java_ty + " " + struct_name + "_get_err(long arg);\n")
 713             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")
 714             write_c("\t" + struct_name + " *val = (" + struct_name + "*)(arg & ~1);\n")
 715             write_c("\tCHECK(!val->result_ok);\n\t")
 716             out_java_struct.write("\tpublic static final class " + human_ty + "_Err extends " + human_ty + " {\n")
 717             if err_map.ret_conv is not None:
 718                 write_c(err_map.ret_conv[0].replace("\n", "\n\t") + "(*val->contents.err)")
 719                 write_c(err_map.ret_conv[1].replace("\n", "\n\t") + "\n\treturn " + err_map.ret_conv_name)
 720             else:
 721                 write_c("return *val->contents.err")
 722             write_c(";\n}\n")
 723
 724             if err_map.java_hu_ty != "void":
 725                 out_java_struct.write("\t\tpublic final " + err_map.java_hu_ty + " err;\n")
 726             out_java_struct.write("\t\tprivate " + human_ty + "_Err(Object _dummy, long ptr) {\n")
 727             out_java_struct.write("\t\t\tsuper(_dummy, ptr);\n")
 728             if err_map.java_hu_ty == "void":
 729                 pass
 730             elif err_map.to_hu_conv is not None:
 731                 out_java_struct.write("\t\t\t" + err_map.java_ty + " err = bindings." + struct_name + "_get_err(ptr);\n")
 732                 out_java_struct.write("\t\t\t" + err_map.to_hu_conv.replace("\n", "\n\t\t\t"))
 733                 out_java_struct.write("\n\t\t\tthis.err = " + err_map.to_hu_conv_name + ";\n")
 734             else:
 735                 out_java_struct.write("\t\t\tthis.err = bindings." + struct_name + "_get_err(ptr);\n")
 736             out_java_struct.write("\t\t}\n")
 737
 738             out_java_struct.write("\t}\n\n")
 739
 740     def map_tuple(struct_name, field_lines):
 741         out_java.write("\tpublic static native long " + struct_name + "_new(")
 742         write_c(consts.c_fn_ty_pfx + consts.ptr_c_ty + " " + consts.c_fn_name_define_pfx(struct_name + "_new", len(field_lines) > 3))
 743         ty_list = []
 744         for idx, (line, _) in enumerate(field_lines):
 745             if idx != 0 and idx < len(field_lines) - 2:
 746                 ty_info = java_c_types(line.strip(';'), None)
 747                 if idx != 1:
 748                     out_java.write(", ")
 749                     write_c(", ")
 750                 e = chr(ord('a') + idx - 1)
 751                 out_java.write(ty_info.java_ty + " " + e)
 752                 write_c(ty_info.c_ty + " " + e)
 753                 ty_list.append(ty_info)
 754         tuple_types[struct_name] = (ty_list, struct_name)
 755         out_java.write(");\n")
 756         write_c(") {\n")
 757         write_c("\t" + struct_name + "* ret = MALLOC(sizeof(" + struct_name + "), \"" + struct_name + "\");\n")
 758         for idx, (line, _) in enumerate(field_lines):
 759             if idx != 0 and idx < len(field_lines) - 2:
 760                 ty_info = type_mapping_generator.map_type(line.strip(';'), False, None, False, False)
 761                 e = chr(ord('a') + idx - 1)
 762                 if ty_info.arg_conv is not None:
 763                     write_c("\t" + ty_info.arg_conv.replace("\n", "\n\t"))
 764                     write_c("\n\tret->" + e + " = " + ty_info.arg_conv_name + ";\n")
 765                 else:
 766                     write_c("\tret->" + e + " = " + e + ";\n")
 767                 if ty_info.arg_conv_cleanup is not None:
 768                     write_c("\t//TODO: Really need to call " + ty_info.arg_conv_cleanup + " here\n")
 769         write_c("\treturn (uint64_t)ret;\n")
 770         write_c("}\n")
 771
 772         for idx, ty_info in enumerate(ty_list):
 773             e = chr(ord('a') + idx)
 774             out_java.write("\tpublic static native " + ty_info.java_ty + " " + struct_name + "_get_" + e + "(long ptr);\n")
 775             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")
 776             write_c("\t" + struct_name + " *tuple = (" + struct_name + "*)(ptr & ~1);\n")
 777             conv_info = type_mapping_generator.map_type_with_info(ty_info, False, None, False, True)
 778             if conv_info.ret_conv is not None:
 779                 write_c("\t" + conv_info.ret_conv[0].replace("\n", "\n\t") + "tuple->" + e + conv_info.ret_conv[1].replace("\n", "\n\t") + "\n")
 780                 write_c("\treturn " + conv_info.ret_conv_name + ";\n")
 781             else:
 782                 write_c("\treturn tuple->" + e + ";\n")
 783             write_c("}\n")
 784
 785     out_java.write(consts.bindings_header.replace('<git_version_ldk_garbagecollected>', local_git_version))
 786
 787     with open(f"{sys.argv[3]}/structs/CommonBase{consts.file_ext}", "w") as out_java_struct:
 788         out_java_struct.write(consts.common_base)
 789
 790     block_comment = None
 791     last_block_comment = None
 792     cur_block_obj = None
 793
 794     const_val_regex = re.compile("^extern const ([A-Za-z_0-9]*) ([A-Za-z_0-9]*);$")
 795
 796     line_indicates_result_regex = re.compile("^   union (LDKCResult_[A-Za-z_0-9]*Ptr) contents;$")
 797     line_indicates_vec_regex = re.compile("^   (struct |enum |union )?([A-Za-z_0-9]*) \*data;$")
 798     line_indicates_opaque_regex = re.compile("^   bool is_owned;$")
 799     line_indicates_trait_regex = re.compile("^   (struct |enum |union )?([A-Za-z_0-9]* \*?)\(\*([A-Za-z_0-9]*)\)\((const )?void \*this_arg(.*)\);$")
 800     assert(line_indicates_trait_regex.match("   uintptr_t (*send_data)(void *this_arg, LDKu8slice data, bool resume_read);"))
 801     assert(line_indicates_trait_regex.match("   struct LDKCVec_MessageSendEventZ (*get_and_clear_pending_msg_events)(const void *this_arg);"))
 802     assert(line_indicates_trait_regex.match("   struct LDKCVec_u8Z (*write)(const void *this_arg);"))
 803     line_indicates_trait_clone_regex = re.compile("^   void \(\*cloned\)\(struct ([A-Za-z0-9])* \*NONNULL_PTR new_[A-Za-z0-9]*\);$")
 804     assert(line_indicates_trait_clone_regex.match("   void (*cloned)(struct LDKSign *NONNULL_PTR new_Sign);"))
 805     line_field_var_regex = re.compile("^   struct ([A-Za-z_0-9]*) ([A-Za-z_0-9]*);$")
 806     assert(line_field_var_regex.match("   struct LDKMessageSendEventsProvider MessageSendEventsProvider;"))
 807     assert(line_field_var_regex.match("   struct LDKChannelPublicKeys pubkeys;"))
 808     struct_name_regex = re.compile("^typedef (struct|enum|union) (MUST_USE_STRUCT )?(LDK[A-Za-z_0-9]*) {$")
 809     assert(struct_name_regex.match("typedef struct LDKCVec_u8Z {"))
 810     assert(struct_name_regex.match("typedef enum LDKNetwork {"))
 811
 812     union_enum_items = {}
 813     result_ptr_struct_items = {}
 814     for line in in_h:
 815         if block_comment is not None:
 816             if line.endswith("*/\n"):
 817                 last_block_comment = block_comment.strip("\n")
 818                 block_comment = None
 819             else:
 820                 block_comment = block_comment + line.strip(" /*")
 821         elif cur_block_obj is not None:
 822             cur_block_obj  = cur_block_obj + line
 823             if line.startswith("} "):
 824                 field_lines = []
 825                 struct_name = None
 826                 vec_ty = None
 827                 obj_lines = cur_block_obj.split("\n")
 828                 is_opaque = False
 829                 result_contents = None
 830                 is_unitary_enum = False
 831                 is_union_enum = False
 832                 is_union = False
 833                 is_tuple = False
 834                 trait_fn_lines = []
 835                 field_var_lines = []
 836                 last_struct_block_comment = None
 837
 838                 for idx, struct_line in enumerate(obj_lines):
 839                     if struct_line.strip().startswith("/*"):
 840                         block_comment = struct_line.strip(" /*")
 841                     if block_comment is not None:
 842                         if struct_line.endswith("*/"):
 843                             last_struct_block_comment = block_comment.strip("\n")
 844                             block_comment = None
 845                         else:
 846                             block_comment = block_comment + "\n" + struct_line.strip(" /*")
 847                     else:
 848                         struct_name_match = struct_name_regex.match(struct_line)
 849                         if struct_name_match is not None:
 850                             struct_name = struct_name_match.group(3)
 851                             if struct_name_match.group(1) == "enum":
 852                                 if not struct_name.endswith("_Tag"):
 853                                     is_unitary_enum = True
 854                                 else:
 855                                     is_union_enum = True
 856                             elif struct_name_match.group(1) == "union":
 857                                 is_union = True
 858                         if line_indicates_opaque_regex.match(struct_line):
 859                             is_opaque = True
 860                         result_match = line_indicates_result_regex.match(struct_line)
 861                         if result_match is not None:
 862                             result_contents = result_match.group(1)
 863                         vec_ty_match = line_indicates_vec_regex.match(struct_line)
 864                         if vec_ty_match is not None and struct_name.startswith("LDKCVec_"):
 865                             vec_ty = vec_ty_match.group(2)
 866                         elif struct_name.startswith("LDKC2Tuple_") or struct_name.startswith("LDKC3Tuple_"):
 867                             is_tuple = True
 868                         trait_fn_match = line_indicates_trait_regex.match(struct_line)
 869                         if trait_fn_match is not None:
 870                             trait_fn_lines.append((last_struct_block_comment, trait_fn_match))
 871                         trait_clone_fn_match = line_indicates_trait_clone_regex.match(struct_line)
 872                         if trait_clone_fn_match is not None:
 873                             trait_fn_lines.append((last_struct_block_comment, "cloned"))
 874                         field_var_match = line_field_var_regex.match(struct_line)
 875                         if field_var_match is not None:
 876                             field_var_lines.append(field_var_match)
 877                         field_lines.append((struct_line, last_struct_block_comment))
 878                         last_struct_block_comment = None
 879
 880                 assert(struct_name is not None)
 881                 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))
 882                 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))
 883                 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))
 884                 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))
 885                 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))
 886                 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))
 887                 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))
 888
 889                 if is_opaque:
 890                     opaque_structs.add(struct_name)
 891                     with open(f"{sys.argv[3]}/structs/{struct_name.replace('LDK', '')}{consts.file_ext}", "w") as out_java_struct:
 892                         out_opaque_struct_human = consts.map_opaque_struct(struct_name, last_block_comment)
 893                         last_block_comment = None
 894                         out_java_struct.write(out_opaque_struct_human)
 895                 elif result_contents is not None:
 896                     assert result_contents in result_ptr_struct_items
 897                     res_ty, err_ty = result_ptr_struct_items[result_contents]
 898                     map_result(struct_name, res_ty, err_ty)
 899                 elif struct_name.startswith("LDKCResult_") and struct_name.endswith("ZPtr"):
 900                     for line, _ in field_lines:
 901                         if line.endswith("*result;"):
 902                             res_ty = line[:-8].strip()
 903                         elif line.endswith("*err;"):
 904                             err_ty = line[:-5].strip()
 905                     result_ptr_struct_items[struct_name] = (res_ty, err_ty)
 906                     result_types.add(struct_name[:-3])
 907                 elif is_tuple:
 908                     map_tuple(struct_name, field_lines)
 909                 elif vec_ty is not None:
 910                     ty_info = type_mapping_generator.map_type(vec_ty + " arr_elem", False, None, False, False)
 911                     if len(ty_info.java_fn_ty_arg) == 1: # ie we're a primitive of some form
 912                         out_java.write("\tpublic static native long " + struct_name + "_new(" + ty_info.java_ty + "[] elems);\n")
 913                         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")
 914                         write_c("\t" + struct_name + " *ret = MALLOC(sizeof(" + struct_name + "), \"" + struct_name + "\");\n")
 915                         write_c("\tret->datalen = " + consts.get_native_arr_len_call[0] + "elems" + consts.get_native_arr_len_call[1] + ";\n")
 916                         write_c("\tif (ret->datalen == 0) {\n")
 917                         write_c("\t\tret->data = NULL;\n")
 918                         write_c("\t} else {\n")
 919                         write_c("\t\tret->data = MALLOC(sizeof(" + vec_ty + ") * ret->datalen, \"" + struct_name + " Data\");\n")
 920                         native_arr_ptr_call = consts.get_native_arr_ptr_call(ty_info.ty_info)
 921                         write_c("\t\t" + ty_info.c_ty + " *java_elems = " + native_arr_ptr_call[0] + "elems" + native_arr_ptr_call[1] + ";\n")
 922                         write_c("\t\tfor (size_t i = 0; i < ret->datalen; i++) {\n")
 923                         if ty_info.arg_conv is not None:
 924                             write_c("\t\t\t" + ty_info.c_ty + " arr_elem = java_elems[i];\n")
 925                             write_c("\t\t\t" + ty_info.arg_conv.replace("\n", "\n\t\t\t") + "\n")
 926                             write_c("\t\t\tret->data[i] = " + ty_info.arg_conv_name + ";\n")
 927                             assert ty_info.arg_conv_cleanup is None
 928                         else:
 929                             write_c("\t\t\tret->data[i] = java_elems[i];\n")
 930                         write_c("\t\t}\n")
 931                         cleanup = consts.release_native_arr_ptr_call(ty_info.ty_info, "elems", "java_elems")
 932                         if cleanup is not None:
 933                             write_c("\t\t" + cleanup + ";\n")
 934                         write_c("\t}\n")
 935                         write_c("\treturn (uint64_t)ret;\n")
 936                         write_c("}\n")
 937
 938                     if ty_info.is_native_primitive:
 939                         clone_fns.add(struct_name.replace("LDK", "") + "_clone")
 940                         write_c("static inline " + struct_name + " " + struct_name.replace("LDK", "") + "_clone(const " + struct_name + " *orig) {\n")
 941                         write_c("\t" + struct_name + " ret = { .data = MALLOC(sizeof(" + ty_info.c_ty + ") * orig->datalen, \"" + struct_name + " clone bytes\"), .datalen = orig->datalen };\n")
 942                         write_c("\tmemcpy(ret.data, orig->data, sizeof(" + ty_info.c_ty + ") * ret.datalen);\n")
 943                         write_c("\treturn ret;\n}\n")
 944                     elif (ty_info.rust_obj.replace("LDK", "") + "_clone") in clone_fns:
 945                         ty_name = "CVec_" + ty_info.rust_obj.replace("LDK", "") + "Z";
 946                         clone_fns.add(ty_name + "_clone")
 947                         write_c("static inline " + struct_name + " " + ty_name + "_clone(const " + struct_name + " *orig) {\n")
 948                         write_c("\t" + struct_name + " ret = { .data = MALLOC(sizeof(" + ty_info.rust_obj + ") * orig->datalen, \"" + struct_name + " clone bytes\"), .datalen = orig->datalen };\n")
 949                         write_c("\tfor (size_t i = 0; i < ret.datalen; i++) {\n")
 950                         write_c("\t\tret.data[i] = " + ty_info.rust_obj.replace("LDK", "") + "_clone(&orig->data[i]);\n")
 951                         write_c("\t}\n\treturn ret;\n}\n")
 952                 elif is_union_enum:
 953                     assert(struct_name.endswith("_Tag"))
 954                     struct_name = struct_name[:-4]
 955                     union_enum_items[struct_name] = {"field_lines": field_lines}
 956                 elif struct_name.endswith("_Body") and struct_name.split("_")[0] in union_enum_items:
 957                     enum_var_name = struct_name.split("_")
 958                     union_enum_items[enum_var_name[0]][enum_var_name[1]] = field_lines
 959                 elif struct_name in union_enum_items:
 960                     tuple_variants = {}
 961                     elem_items = -1
 962                     for line, _ in field_lines:
 963                         if line == "      struct {":
 964                             elem_items = 0
 965                         elif line == "      };":
 966                             elem_items = -1
 967                         elif elem_items > -1:
 968                             line = line.strip()
 969                             if line.startswith("struct "):
 970                                 line = line[7:]
 971                             elif line.startswith("enum "):
 972                                 line = line[5:]
 973                             split = line.split(" ")
 974                             assert len(split) == 2
 975                             tuple_variants[split[1].strip(";")] = split[0]
 976                             elem_items += 1
 977                             if elem_items > 1:
 978                                 # We don't currently support tuple variant with more than one element
 979                                 assert False
 980                     map_complex_enum(struct_name, union_enum_items[struct_name], tuple_variants, last_block_comment)
 981                     last_block_comment = None
 982                 elif is_unitary_enum:
 983                     map_unitary_enum(struct_name, field_lines, last_block_comment)
 984                     last_block_comment = None
 985                 elif len(trait_fn_lines) > 0:
 986                     map_trait(struct_name, field_var_lines, trait_fn_lines, last_block_comment)
 987                 elif struct_name == "LDKTxOut":
 988                     with open(f"{sys.argv[3]}/structs/TxOut{consts.file_ext}", "w") as out_java_struct:
 989                         out_java_struct.write(consts.hu_struct_file_prefix)
 990                         out_java_struct.write("public class TxOut extends CommonBase{\n")
 991                         out_java_struct.write("\tTxOut(java.lang.Object _dummy, long ptr) { super(ptr); }\n")
 992                         out_java_struct.write("\tlong to_c_ptr() { return 0; }\n")
 993                         out_java_struct.write("\t@Override @SuppressWarnings(\"deprecation\")\n")
 994                         out_java_struct.write("\tprotected void finalize() throws Throwable {\n")
 995                         out_java_struct.write("\t\tsuper.finalize();\n")
 996                         out_java_struct.write("\t\tif (ptr != 0) { bindings.TxOut_free(ptr); }\n")
 997                         out_java_struct.write("\t}\n")
 998                         # TODO: TxOut body
 999                         out_java_struct.write("}")
1000                 else:
1001                     pass # Everything remaining is a byte[] or some form
1002                 cur_block_obj = None
1003         else:
1004             fn_ptr = fn_ptr_regex.match(line)
1005             fn_ret_arr = fn_ret_arr_regex.match(line)
1006             reg_fn = reg_fn_regex.match(line)
1007             const_val = const_val_regex.match(line)
1008
1009             if line.startswith("#include <"):
1010                 pass
1011             elif line.startswith("/*"):
1012                 if not line.endswith("*/\n"):
1013                     block_comment = line.strip(" /*")
1014             elif line.startswith("typedef enum "):
1015                 cur_block_obj = line
1016             elif line.startswith("typedef struct "):
1017                 cur_block_obj = line
1018             elif line.startswith("typedef union "):
1019                 cur_block_obj = line
1020             elif fn_ptr is not None:
1021                 map_fn(line, fn_ptr, None, None, last_block_comment)
1022                 last_block_comment = None
1023             elif fn_ret_arr is not None:
1024                 map_fn(line, fn_ret_arr, fn_ret_arr.group(4), None, last_block_comment)
1025                 last_block_comment = None
1026             elif reg_fn is not None:
1027                 map_fn(line, reg_fn, None, None, last_block_comment)
1028                 last_block_comment = None
1029             elif const_val_regex is not None:
1030                 # TODO Map const variables
1031                 pass
1032             else:
1033                 assert(line == "\n")
1034
1035     out_java.write(consts.bindings_footer)
1036     for struct_name in opaque_structs:
1037         with open(f"{sys.argv[3]}/structs/{struct_name.replace('LDK', '')}{consts.file_ext}", "a") as out_java_struct:
1038             out_java_struct.write("}\n")
1039     for struct_name in trait_structs:
1040         with open(f"{sys.argv[3]}/structs/{struct_name.replace('LDK', '')}{consts.file_ext}", "a") as out_java_struct:
1041             out_java_struct.write("}\n")
1042     for struct_name in complex_enums:
1043         with open(f"{sys.argv[3]}/structs/{struct_name.replace('LDK', '').replace('COption', 'Option')}{consts.file_ext}", "a") as out_java_struct:
1044             out_java_struct.write("}\n")
1045     for struct_name in result_types:
1046         with open(f"{sys.argv[3]}/structs/{struct_name.replace('LDKCResult', 'Result')}{consts.file_ext}", "a") as out_java_struct:
1047             out_java_struct.write("}\n")
1048
1049 with open(sys.argv[4], "w") as out_c:
1050     out_c.write(consts.c_file_pfx.replace('<git_version_ldk_garbagecollected>', local_git_version))
1051     out_c.write(consts.init_str())
1052     out_c.write(c_file)
1053 with open(f"{sys.argv[3]}/structs/UtilMethods{consts.file_ext}", "a") as util:
1054     util.write(consts.util_fn_sfx)