_ 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, outdir=sys.argv[4])
  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 # Map from enum name to "contains trait object"
  98 complex_enums = {}
  99 opaque_structs = set()
 100 trait_structs = {}
 101 result_types = set()
 102 tuple_types = {}
 103
 104 var_is_arr_regex = re.compile("\(\* ?([A-za-z0-9_]*)\)\[([a-z0-9]*)\]")
 105 var_ty_regex = re.compile("([A-za-z_0-9]*)(.*)")
 106 java_c_types_none_allowed = True # Unset when we do the real pass that populates the above sets
 107 def java_c_types(fn_arg, ret_arr_len):
 108     fn_arg = fn_arg.strip()
 109     if fn_arg.startswith("MUST_USE_RES "):
 110         fn_arg = fn_arg[13:]
 111     is_const = False
 112     if fn_arg.startswith("const "):
 113         fn_arg = fn_arg[6:]
 114         is_const = True
 115     if fn_arg.startswith("struct "):
 116         fn_arg = fn_arg[7:]
 117     if fn_arg.startswith("enum "):
 118         fn_arg = fn_arg[5:]
 119     nonnull_ptr = "NONNULL_PTR" in fn_arg
 120     fn_arg = fn_arg.replace("NONNULL_PTR", "")
 121
 122     is_ptr = False
 123     take_by_ptr = False
 124     rust_obj = None
 125     arr_access = None
 126     java_hu_ty = None
 127     if fn_arg.startswith("LDKPaymentPreimage") or fn_arg.startswith("LDKPaymentSecret") or fn_arg.startswith("LDKPaymentHash"):
 128         if fn_arg.startswith("LDKPaymentPreimage"):
 129             fn_arg = "uint8_t (*" + fn_arg[19:] + ")[32]"
 130         elif fn_arg.startswith("LDKPaymentSecret"):
 131             fn_arg = "uint8_t (*" + fn_arg[17:] + ")[32]"
 132         elif fn_arg.startswith("LDKPaymentHash"):
 133             fn_arg = "uint8_t (*" + fn_arg[15:] + ")[32]"
 134         assert var_is_arr_regex.match(fn_arg[8:])
 135         rust_obj = "LDKThirtyTwoBytes"
 136         arr_access = "data"
 137     elif fn_arg.startswith("LDKThirtyTwoBytes"):
 138         fn_arg = "uint8_t (*" + fn_arg[18:] + ")[32]"
 139         assert var_is_arr_regex.match(fn_arg[8:])
 140         rust_obj = "LDKThirtyTwoBytes"
 141         arr_access = "data"
 142     elif fn_arg.startswith("LDKTxid"):
 143         fn_arg = "uint8_t (*" + fn_arg[8:] + ")[32]"
 144         assert var_is_arr_regex.match(fn_arg[8:])
 145         rust_obj = "LDKThirtyTwoBytes"
 146         arr_access = "data"
 147     elif fn_arg.startswith("LDKPublicKey"):
 148         fn_arg = "uint8_t (*" + fn_arg[13:] + ")[33]"
 149         assert var_is_arr_regex.match(fn_arg[8:])
 150         rust_obj = "LDKPublicKey"
 151         arr_access = "compressed_form"
 152     elif fn_arg.startswith("LDKSecretKey"):
 153         fn_arg = "uint8_t (*" + fn_arg[13:] + ")[32]"
 154         assert var_is_arr_regex.match(fn_arg[8:])
 155         rust_obj = "LDKSecretKey"
 156         arr_access = "bytes"
 157     elif fn_arg.startswith("LDKSignature"):
 158         fn_arg = "uint8_t (*" + fn_arg[13:] + ")[64]"
 159         assert var_is_arr_regex.match(fn_arg[8:])
 160         rust_obj = "LDKSignature"
 161         arr_access = "compact_form"
 162     elif fn_arg.startswith("LDKRecoverableSignature"):
 163         fn_arg = "uint8_t (*" + fn_arg[24:] + ")[68]"
 164         assert var_is_arr_regex.match(fn_arg[8:])
 165         rust_obj = "LDKRecoverableSignature"
 166         arr_access = "serialized_form"
 167     elif fn_arg.startswith("LDKThreeBytes"):
 168         fn_arg = "uint8_t (*" + fn_arg[14:] + ")[3]"
 169         assert var_is_arr_regex.match(fn_arg[8:])
 170         rust_obj = "LDKThreeBytes"
 171         arr_access = "data"
 172     elif fn_arg.startswith("LDKFourBytes"):
 173         fn_arg = "uint8_t (*" + fn_arg[13:] + ")[4]"
 174         assert var_is_arr_regex.match(fn_arg[8:])
 175         rust_obj = "LDKFourBytes"
 176         arr_access = "data"
 177     elif fn_arg.startswith("LDKSixteenBytes"):
 178         fn_arg = "uint8_t (*" + fn_arg[16:] + ")[16]"
 179         assert var_is_arr_regex.match(fn_arg[8:])
 180         rust_obj = "LDKSixteenBytes"
 181         arr_access = "data"
 182     elif fn_arg.startswith("LDKTwentyBytes"):
 183         fn_arg = "uint8_t (*" + fn_arg[15:] + ")[20]"
 184         assert var_is_arr_regex.match(fn_arg[8:])
 185         rust_obj = "LDKTwentyBytes"
 186         arr_access = "data"
 187     elif fn_arg.startswith("LDKTwelveBytes"):
 188         fn_arg = "uint8_t (*" + fn_arg[15:] + ")[12]"
 189         assert var_is_arr_regex.match(fn_arg[8:])
 190         rust_obj = "LDKTwelveBytes"
 191         arr_access = "data"
 192     elif fn_arg.startswith("LDKu8slice"):
 193         fn_arg = "uint8_t (*" + fn_arg[11:] + ")[datalen]"
 194         assert var_is_arr_regex.match(fn_arg[8:])
 195         rust_obj = "LDKu8slice"
 196         arr_access = "data"
 197     elif fn_arg.startswith("LDKCVec_u8Z"):
 198         fn_arg = "uint8_t (*" + fn_arg[12:] + ")[datalen]"
 199         rust_obj = "LDKCVec_u8Z"
 200         assert var_is_arr_regex.match(fn_arg[8:])
 201         arr_access = "data"
 202     elif fn_arg.startswith("LDKTransaction ") or fn_arg == "LDKTransaction":
 203         fn_arg = "uint8_t (*" + fn_arg[15:] + ")[datalen]"
 204         rust_obj = "LDKTransaction"
 205         assert var_is_arr_regex.match(fn_arg[8:])
 206         arr_access = "data"
 207     elif fn_arg.startswith("LDKCVec_"):
 208         is_ptr = False
 209         if "*" in fn_arg:
 210             fn_arg = fn_arg.replace("*", "")
 211             is_ptr = True
 212
 213         tyn = fn_arg[8:].split(" ")
 214         assert tyn[0].endswith("Z")
 215         if tyn[0] == "u64Z":
 216             new_arg = "uint64_t"
 217         else:
 218             new_arg = "LDK" + tyn[0][:-1]
 219         for a in tyn[1:]:
 220             new_arg = new_arg + " " + a
 221         res = java_c_types(new_arg, ret_arr_len)
 222         if res is None:
 223             assert java_c_types_none_allowed
 224             return None
 225         if is_ptr:
 226             res.pass_by_ref = True
 227         java_ty = consts.java_arr_ty_str(res.java_ty)
 228         if res.is_native_primitive or res.passed_as_ptr:
 229             return TypeInfo(rust_obj=fn_arg.split(" ")[0], java_ty=java_ty, java_hu_ty=res.java_hu_ty + "[]",
 230                 java_fn_ty_arg="[" + res.java_fn_ty_arg, c_ty=res.c_ty + "Array", passed_as_ptr=False, is_ptr=is_ptr,
 231                 nonnull_ptr=nonnull_ptr, is_const=is_const,
 232                 var_name=res.var_name, arr_len="datalen", arr_access="data", subty=res, is_native_primitive=False)
 233         else:
 234             return TypeInfo(rust_obj=fn_arg.split(" ")[0], java_ty=java_ty, java_hu_ty=res.java_hu_ty + "[]",
 235                 java_fn_ty_arg="[" + res.java_fn_ty_arg, c_ty=consts.ptr_arr, passed_as_ptr=False, is_ptr=is_ptr,
 236                 nonnull_ptr=nonnull_ptr, is_const=is_const,
 237                 var_name=res.var_name, arr_len="datalen", arr_access="data", subty=res, is_native_primitive=False)
 238
 239     is_primitive = False
 240     contains_trait = False
 241     arr_len = None
 242     mapped_type = []
 243     java_type_plural = None
 244     arr_ty = None
 245     if fn_arg.startswith("void"):
 246         java_ty = "void"
 247         c_ty = "void"
 248         fn_ty_arg = "V"
 249         fn_arg = fn_arg[4:].strip()
 250         is_primitive = True
 251     elif fn_arg.startswith("bool"):
 252         java_ty = "boolean"
 253         c_ty = "jboolean"
 254         fn_ty_arg = "Z"
 255         arr_ty = "bool"
 256         fn_arg = fn_arg[4:].strip()
 257         is_primitive = True
 258     elif fn_arg.startswith("uint8_t"):
 259         mapped_type = consts.c_type_map['uint8_t']
 260         java_ty = mapped_type[0]
 261         c_ty = "int8_t"
 262         fn_ty_arg = "B"
 263         arr_ty = "uint8_t"
 264         fn_arg = fn_arg[7:].strip()
 265         is_primitive = True
 266     elif fn_arg.startswith("LDKu5") or fn_arg.startswith("LDKWitnessVersion"):
 267         java_ty = consts.c_type_map['uint8_t'][0]
 268         if fn_arg.startswith("LDKu5"):
 269             java_hu_ty = "UInt5"
 270             rust_obj = "LDKu5"
 271             fn_arg = fn_arg[6:].strip()
 272         else:
 273             java_hu_ty = "WitnessVersion"
 274             rust_obj = "LDKWitnessVersion"
 275             fn_arg = fn_arg[18:].strip()
 276         c_ty = "int8_t"
 277         arr_ty = "uint8_t"
 278         fn_ty_arg = "B"
 279     elif fn_arg.startswith("uint16_t"):
 280         mapped_type = consts.c_type_map['uint16_t']
 281         java_ty = mapped_type[0]
 282         c_ty = "int16_t"
 283         arr_ty = "uint16_t"
 284         fn_ty_arg = "S"
 285         fn_arg = fn_arg[8:].strip()
 286         is_primitive = True
 287     elif fn_arg.startswith("uint32_t"):
 288         mapped_type = consts.c_type_map['uint32_t']
 289         java_ty = mapped_type[0]
 290         c_ty = "int32_t"
 291         arr_ty = "uint32_t"
 292         fn_ty_arg = "I"
 293         fn_arg = fn_arg[8:].strip()
 294         is_primitive = True
 295     elif fn_arg.startswith("uint64_t") or fn_arg.startswith("uintptr_t"):
 296         # TODO: uintptr_t is arch-dependent :(
 297         mapped_type = consts.c_type_map['uint64_t']
 298         java_ty = mapped_type[0]
 299         fn_ty_arg = "J"
 300         if fn_arg.startswith("uint64_t"):
 301             c_ty = "int64_t"
 302             arr_ty = "uint64_t"
 303             fn_arg = fn_arg[8:].strip()
 304         else:
 305             java_ty = consts.ptr_native_ty
 306             c_ty = consts.ptr_c_ty
 307             arr_ty = "uintptr_t"
 308             rust_obj = "uintptr_t"
 309             fn_arg = fn_arg[9:].strip()
 310         is_primitive = True
 311     elif is_const and fn_arg.startswith("char *"):
 312         java_ty = consts.java_type_map["String"]
 313         java_hu_ty = consts.java_hu_type_map["String"]
 314         c_ty = "const char*"
 315         arr_ty = "LDKStr"
 316         fn_ty_arg = "Ljava/lang/String;"
 317         fn_arg = fn_arg[6:].strip()
 318     elif fn_arg.startswith("LDKStr"):
 319         rust_obj = "LDKStr"
 320         arr_ty = "LDKStr"
 321         java_ty = consts.java_type_map["String"]
 322         java_hu_ty = consts.java_hu_type_map["String"]
 323         c_ty = "jstring"
 324         fn_ty_arg = "Ljava/lang/String;"
 325         fn_arg = fn_arg[6:].strip()
 326         arr_access = "chars"
 327         arr_len = "len"
 328     elif fn_arg.startswith("LDKError ") or fn_arg == "LDKError":
 329         java_ty = consts.c_type_map['uint32_t'][0]
 330         java_hu_ty = "UnqualifiedError"
 331         rust_obj = "LDKError"
 332         c_ty = "int32_t"
 333         arr_ty = "uint32_t"
 334         fn_ty_arg = "I"
 335         fn_arg = fn_arg[8:].strip()
 336     else:
 337         ma = var_ty_regex.match(fn_arg)
 338         arr_ty = ma.group(1).strip()
 339         if ma.group(1).strip() in unitary_enums:
 340             assert ma.group(1).strip().startswith("LDK")
 341             java_ty = ma.group(1).strip()[3:]
 342             java_hu_ty = java_ty
 343             c_ty = consts.result_c_ty
 344             fn_ty_arg = "Lorg/ldk/enums/" + java_ty + ";"
 345             fn_arg = ma.group(2).strip()
 346             rust_obj = ma.group(1).strip()
 347         else:
 348             c_ty = consts.ptr_c_ty
 349             java_ty = consts.ptr_native_ty
 350             java_hu_ty = ma.group(1).strip()
 351             java_hu_ty = java_hu_ty.replace("LDKCOption", "Option")
 352             java_hu_ty = java_hu_ty.replace("LDKCResult", "Result")
 353             java_hu_ty = java_hu_ty.replace("LDKC2Tuple", "TwoTuple")
 354             java_hu_ty = java_hu_ty.replace("LDKC3Tuple", "ThreeTuple")
 355             java_hu_ty = java_hu_ty.replace("LDK", "")
 356             fn_ty_arg = "J"
 357             fn_arg = ma.group(2).strip()
 358             rust_obj = ma.group(1).strip()
 359             if rust_obj in trait_structs:
 360                 contains_trait = True
 361             elif rust_obj in complex_enums:
 362                 contains_trait = complex_enums[rust_obj]
 363             take_by_ptr = True
 364
 365     if fn_arg.startswith(" *") or fn_arg.startswith("*"):
 366         fn_arg = fn_arg.replace("*", "").strip()
 367         is_ptr = True
 368         c_ty = consts.ptr_c_ty
 369         java_ty = consts.ptr_native_ty
 370         fn_ty_arg = "J"
 371
 372     var_is_arr = var_is_arr_regex.match(fn_arg)
 373     subty = None
 374     if var_is_arr is not None or ret_arr_len is not None:
 375         assert(not take_by_ptr)
 376         assert(not is_ptr)
 377         # is there a special case for plurals?
 378         if len(mapped_type) == 3:
 379             java_ty = mapped_type[1]
 380             java_hu_ty = mapped_type[2]
 381         else:
 382             java_ty = java_ty + "[]"
 383             java_hu_ty = java_ty
 384         c_ty = c_ty + "Array"
 385
 386         subty = java_c_types(arr_ty, None)
 387         if subty is None:
 388             assert java_c_types_none_allowed
 389             return None
 390         if is_ptr:
 391             subty.pass_by_ref = True
 392
 393         if var_is_arr is not None:
 394             if var_is_arr.group(1) == "":
 395                 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, is_const=is_const,
 396                     passed_as_ptr=False, is_ptr=False, nonnull_ptr=nonnull_ptr, var_name="arg", subty=subty,
 397                     arr_len=var_is_arr.group(2), arr_access=arr_access, is_native_primitive=False, contains_trait=contains_trait)
 398             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, is_const=is_const,
 399                 passed_as_ptr=False, is_ptr=False, nonnull_ptr=nonnull_ptr, var_name=var_is_arr.group(1), subty=subty,
 400                 arr_len=var_is_arr.group(2), arr_access=arr_access, is_native_primitive=False, contains_trait=contains_trait)
 401
 402     if java_hu_ty is None:
 403         java_hu_ty = java_ty
 404     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,
 405         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,
 406         contains_trait=contains_trait, subty=subty)
 407
 408 fn_ptr_regex = re.compile("^extern const ([A-Za-z_0-9\* ]*) \(\*(.*)\)\((.*)\);$")
 409 fn_ret_arr_regex = re.compile("(.*) \(\*(.*)\((.*)\)\)\[([0-9]*)\];$")
 410 reg_fn_regex = re.compile("([A-Za-z_0-9\* ]* \*?)([a-zA-Z_0-9]*)\((.*)\);$")
 411 clone_fns = set()
 412 constructor_fns = {}
 413
 414 from gen_type_mapping import TypeMappingGenerator
 415 type_mapping_generator = TypeMappingGenerator(java_c_types, consts, opaque_structs, clone_fns, unitary_enums, trait_structs, complex_enums, result_types, tuple_types)
 416
 417 with open(sys.argv[1]) as in_h:
 418     for line in in_h:
 419         reg_fn = reg_fn_regex.match(line)
 420         if reg_fn is not None:
 421             if reg_fn.group(2).endswith("_clone"):
 422                 clone_fns.add(reg_fn.group(2))
 423             else:
 424                 rty = java_c_types(reg_fn.group(1), None)
 425                 if rty is not None and not rty.is_native_primitive and reg_fn.group(2) == rty.java_hu_ty + "_new":
 426                     constructor_fns[rty.rust_obj] = reg_fn.group(3)
 427             continue
 428         arr_fn = fn_ret_arr_regex.match(line)
 429         if arr_fn is not None:
 430             if arr_fn.group(2).endswith("_clone"):
 431                 clone_fns.add(arr_fn.group(2))
 432             # No object constructors return arrays, as then they wouldn't be an object constructor
 433             continue
 434
 435 # Define some manual clones...
 436 clone_fns.add("ThirtyTwoBytes_clone")
 437 write_c("static inline struct LDKThirtyTwoBytes ThirtyTwoBytes_clone(const struct LDKThirtyTwoBytes *orig) { struct LDKThirtyTwoBytes ret; memcpy(ret.data, orig->data, 32); return ret; }\n")
 438
 439 java_c_types_none_allowed = False # C structs created by cbindgen are declared in dependency order
 440
 441 with open(f"{sys.argv[3]}/structs/UtilMethods{consts.file_ext}", "a") as util:
 442     util.write(consts.util_fn_pfx)
 443
 444 with open(sys.argv[1]) as in_h, open(f"{sys.argv[2]}/bindings{consts.file_ext}", "w") as out_java:
 445     # Map a top-level function
 446     def map_fn(line, re_match, ret_arr_len, c_call_string, doc_comment):
 447         map_fn_with_ref_option(line, re_match, ret_arr_len, c_call_string, doc_comment, False)
 448     def map_fn_with_ref_option(line, re_match, ret_arr_len, c_call_string, doc_comment, force_holds_ref):
 449         method_return_type = re_match.group(1)
 450         method_name = re_match.group(2)
 451         method_comma_separated_arguments = re_match.group(3)
 452         method_arguments = method_comma_separated_arguments.split(',')
 453
 454         if method_name.startswith("__"):
 455             return
 456
 457         is_free = method_name.endswith("_free")
 458         if method_name.startswith("COption") or method_name.startswith("CResult"):
 459             struct_meth = method_name.rsplit("Z", 1)[0][1:] + "Z"
 460             expected_struct = "LDKC" + struct_meth
 461             struct_meth_name = method_name[len(struct_meth) + 1:].strip("_")
 462         elif method_name.startswith("C2Tuple") or method_name.startswith("C3Tuple"):
 463             tuple_name = method_name.rsplit("Z", 1)[0][2:] + "Z"
 464             if method_name.startswith("C2Tuple"):
 465                 struct_meth = "Two" + tuple_name
 466                 expected_struct = "LDKC2" + tuple_name
 467             else:
 468                 struct_meth = "Three" + tuple_name
 469                 expected_struct = "LDKC3" + tuple_name
 470             struct_meth_name = method_name[len(tuple_name) + 2:].strip("_")
 471         else:
 472             struct_meth = method_name.split("_")[0]
 473             expected_struct = "LDK" + struct_meth
 474             struct_meth_name = method_name[len(struct_meth) + 1 if len(struct_meth) != 0 else 0:].strip("_")
 475
 476         (params_nullable, ret_nullable) = doc_to_params_ret_nullable(doc_comment)
 477         if ret_nullable:
 478             return_type_info = type_mapping_generator.map_nullable_type(method_return_type.strip() + " ret", True, ret_arr_len, False, force_holds_ref)
 479         else:
 480             return_type_info = type_mapping_generator.map_type(method_return_type.strip() + " ret", True, ret_arr_len, False, force_holds_ref)
 481
 482         if method_name.endswith("_clone") and expected_struct not in unitary_enums:
 483             meth_line = "uintptr_t " + expected_struct.replace("LDK", "") + "_clone_ptr(" + expected_struct + " *NONNULL_PTR arg)"
 484             write_c("static inline " + meth_line + " {\n")
 485             write_c("\t" + return_type_info.ret_conv[0].replace("\n", "\n\t"))
 486             write_c(method_name + "(arg)")
 487             write_c(return_type_info.ret_conv[1])
 488             write_c("\n\treturn " + return_type_info.ret_conv_name + ";\n}\n")
 489             map_fn(meth_line + ";\n", re.compile("(uintptr_t) ([A-Za-z_0-9]*)\((.*)\)").match(meth_line), None, None, None)
 490
 491         argument_types = []
 492         default_constructor_args = {}
 493         takes_self = False
 494         takes_self_ptr = False
 495         args_known = True
 496
 497         for argument_index, argument in enumerate(method_arguments):
 498             arg_ty = type_mapping_generator.java_c_types(argument, None)
 499             argument_conversion_info = None
 500             if argument_index == 0 and arg_ty.java_hu_ty == struct_meth:
 501                 argument_conversion_info = type_mapping_generator.map_type_with_info(arg_ty, False, None, is_free, True, False)
 502                 takes_self = True
 503                 if argument_conversion_info.ty_info.is_ptr:
 504                     takes_self_ptr = True
 505             elif arg_ty.var_name in params_nullable:
 506                 argument_conversion_info = type_mapping_generator.map_type_with_info(arg_ty, False, None, is_free, True, True)
 507                 if argument_conversion_info.arg_conv is not None and "WARNING" in argument_conversion_info.arg_conv:
 508                     arg_ty_info = java_c_types(argument, None)
 509                     print("WARNING: Remapping argument " + arg_ty_info.var_name + " of function " + method_name + " to a reference")
 510                     print("    The argument appears to require a move, or not clonable, and is nullable.")
 511                     print("    Normally for arguments that require a move and are not clonable, we split")
 512                     print("    the argument into the type's constructor's arguments and just use those to")
 513                     print("    construct a new object on the fly.")
 514                     print("    However, because the object is nullable, doing so would mean we can no")
 515                     print("    longer allow the user to pass null, as we now have an argument list instead.")
 516                     print("    Thus, we blindly assume its really an Option<&Type> instead of an Option<Type>.")
 517                     print("    It may or may not actually be a reference, but its the simplest mapping option")
 518                     print("    and also the only use of this code today.")
 519                     arg_ty_info.requires_clone = False
 520                     argument_conversion_info = type_mapping_generator.map_type_with_info(arg_ty_info, False, None, is_free, True, True)
 521                     assert argument_conversion_info.nullable
 522                     assert argument_conversion_info.arg_conv is not None and "WARNING" not in argument_conversion_info.arg_conv
 523             else:
 524                 argument_conversion_info = type_mapping_generator.map_type_with_info(arg_ty, False, None, is_free, True, False)
 525
 526             if argument_conversion_info.arg_conv is not None and "WARNING" in argument_conversion_info.arg_conv:
 527                 if argument_conversion_info.rust_obj in constructor_fns:
 528                     assert not is_free
 529                     for explode_arg in constructor_fns[argument_conversion_info.rust_obj].split(','):
 530                         explode_arg_conv = type_mapping_generator.map_type(explode_arg, False, None, False, True)
 531                         if explode_arg_conv.c_ty == "void":
 532                             # We actually want to handle this case, but for now its only used in NetGraphMsgHandler::new()
 533                             # which ends up resulting in a redundant constructor - both without arguments for the NetworkGraph.
 534                             args_known = False
 535                             pass
 536                         if not argument_conversion_info.arg_name in default_constructor_args:
 537                             default_constructor_args[argument_conversion_info.arg_name] = []
 538                         default_constructor_args[argument_conversion_info.arg_name].append(explode_arg_conv)
 539             argument_types.append(argument_conversion_info)
 540
 541         if not takes_self and return_type_info.java_hu_ty != struct_meth:
 542             if not return_type_info.java_hu_ty.startswith("Result_" + struct_meth):
 543                 struct_meth_name = method_name
 544                 struct_meth = ""
 545                 expected_struct = ""
 546
 547         impl_on_struct = (expected_struct in opaque_structs or expected_struct in trait_structs or
 548             expected_struct in complex_enums or expected_struct in complex_enums or
 549             expected_struct in result_types or expected_struct in tuple_types) and not is_free
 550         impl_on_utils = not impl_on_struct and (not is_free and not method_name.endswith("_clone") and
 551             not method_name.startswith("TxOut") and
 552             not method_name.startswith("_") and
 553             method_name != "check_platform" and method_name != "Result_read" and
 554             not expected_struct in unitary_enums and
 555             ((not method_name.startswith("C2Tuple_") and not method_name.startswith("C3Tuple_"))
 556               or method_name.endswith("_read")))
 557
 558         # If we're adding a static method, and it returns a primitive or an array of primitives,
 559         # and a variable conversion adds a reference on the return type (via `this`), skip the
 560         # variable's conversion reference-add (as we obviously cannot need a reference).
 561         if impl_on_utils and (return_type_info.is_native_primitive or
 562                 (return_type_info.ty_info.subty is not None and return_type_info.ty_info.subty.is_native_primitive)):
 563             for arg in argument_types:
 564                 if arg.from_hu_conv is not None and arg.from_hu_conv[1] != "":
 565                     if "this" in arg.from_hu_conv[1]:
 566                         arg.from_hu_conv = (arg.from_hu_conv[0], "")
 567
 568         out_java.write("\t// " + line)
 569         (out_java_delta, out_c_delta, out_java_struct_delta) = \
 570             consts.map_function(argument_types, c_call_string, method_name, struct_meth_name, return_type_info, struct_meth, default_constructor_args, takes_self, takes_self_ptr, args_known, type_mapping_generator, doc_comment)
 571         out_java.write(out_java_delta)
 572
 573         if is_free:
 574             assert len(argument_types) == 1
 575             assert return_type_info.c_ty == "void"
 576             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")
 577             if argument_types[0].ty_info.passed_as_ptr and not argument_types[0].ty_info.rust_obj in opaque_structs:
 578                 write_c("\tif ((" + argument_types[0].ty_info.var_name + " & 1) != 0) return;\n")
 579
 580             for info in argument_types:
 581                 if info.arg_conv is not None:
 582                     write_c("\t" + info.arg_conv.replace('\n', "\n\t") + "\n")
 583             assert c_call_string is None
 584             write_c("\t" + method_name + "(")
 585             if argument_types[0].arg_conv_name is not None:
 586                 write_c(argument_types[0].arg_conv_name)
 587             write_c(");")
 588             for info in argument_types:
 589                 if info.arg_conv_cleanup is not None:
 590                     write_c("\n\t" + info.arg_conv_cleanup.replace("\n", "\n\t"))
 591             write_c("\n}\n\n")
 592         else:
 593             write_c(out_c_delta)
 594
 595         out_java_struct = None
 596         if impl_on_struct:
 597             out_java_struct = open(f"{sys.argv[3]}/structs/{struct_meth}{consts.file_ext}", "a")
 598             out_java_struct.write(out_java_struct_delta)
 599         elif impl_on_utils:
 600             out_java_struct = open(f"{sys.argv[3]}/structs/UtilMethods{consts.file_ext}", "a")
 601             for line in out_java_struct_delta.splitlines():
 602                 out_java_struct.write(line + "\n")
 603
 604     def map_unitary_enum(struct_name, field_lines, enum_doc_comment):
 605         assert struct_name.startswith("LDK")
 606         with open(f"{sys.argv[3]}/enums/{struct_name[3:]}{consts.file_ext}", "w") as out_java_enum:
 607             unitary_enums.add(struct_name)
 608             for idx, (struct_line, _) in enumerate(field_lines):
 609                 if idx == 0:
 610                     assert(struct_line == "typedef enum %s {" % struct_name)
 611                 elif idx == len(field_lines) - 3:
 612                     assert(struct_line.endswith("_Sentinel,"))
 613                 elif idx == len(field_lines) - 2:
 614                     assert(struct_line == "} %s;" % struct_name)
 615                 elif idx == len(field_lines) - 1:
 616                     assert(struct_line == "")
 617             assert struct_name.startswith("LDK")
 618             (c_out, native_file_out, native_out) = consts.native_c_unitary_enum_map(struct_name[3:], [(x.strip().strip(","), y) for x, y in field_lines[1:-3]], enum_doc_comment)
 619             write_c(c_out)
 620             out_java_enum.write(native_file_out)
 621             out_java.write(native_out)
 622
 623     def map_complex_enum(struct_name, union_enum_items, inline_enum_variants, enum_doc_comment):
 624         java_hu_type = struct_name.replace("LDK", "").replace("COption", "Option")
 625
 626         enum_variants = []
 627         tag_field_lines = union_enum_items["field_lines"]
 628         contains_trait = False
 629         for idx, (struct_line, variant_docs) in enumerate(tag_field_lines):
 630             if idx == 0:
 631                 assert(struct_line == "typedef enum %s_Tag {" % struct_name)
 632             elif idx == len(tag_field_lines) - 3:
 633                 assert(struct_line.endswith("_Sentinel,"))
 634             elif idx == len(tag_field_lines) - 2:
 635                 assert(struct_line == "} %s_Tag;" % struct_name)
 636             elif idx == len(tag_field_lines) - 1:
 637                 assert(struct_line == "")
 638             else:
 639                 variant_name = struct_line.strip(' ,')[len(struct_name) + 1:]
 640                 fields = []
 641                 if "LDK" + variant_name in union_enum_items:
 642                     enum_var_lines = union_enum_items["LDK" + variant_name]
 643                     for idx, (field, field_docs) in enumerate(enum_var_lines):
 644                         if idx != 0 and idx < len(enum_var_lines) - 2 and field.strip() != "":
 645                             field_ty = type_mapping_generator.java_c_types(field.strip(' ;'), None)
 646                             contains_trait |= field_ty.contains_trait
 647                             if field_docs is not None and doc_to_field_nullable(field_docs):
 648                                 field_conv = type_mapping_generator.map_type_with_info(field_ty, False, None, False, True, True)
 649                             else:
 650                                 field_conv = type_mapping_generator.map_type_with_info(field_ty, False, None, False, True, False)
 651                             fields.append((field_conv, field_docs))
 652                     enum_variants.append(ComplexEnumVariantInfo(variant_name, variant_docs, fields, False))
 653                 elif camel_to_snake(variant_name) in inline_enum_variants:
 654                     # TODO: If we ever have a rust enum Variant(Option<Struct>) we need to pipe
 655                     # docs through to there, and then potentially mark the field nullable.
 656                     mapped = type_mapping_generator.map_type(inline_enum_variants[camel_to_snake(variant_name)] + " " + camel_to_snake(variant_name), False, None, False, True)
 657                     contains_trait |= mapped.ty_info.contains_trait
 658                     fields.append((mapped, None))
 659                     enum_variants.append(ComplexEnumVariantInfo(variant_name, variant_docs, fields, True))
 660                 else:
 661                     enum_variants.append(ComplexEnumVariantInfo(variant_name, variant_docs, fields, True))
 662         complex_enums[struct_name] = contains_trait
 663
 664         with open(f"{sys.argv[3]}/structs/{java_hu_type}{consts.file_ext}", "w") as out_java_enum:
 665             (out_java_addendum, out_java_enum_addendum, out_c_addendum) = consts.map_complex_enum(struct_name, enum_variants, camel_to_snake, enum_doc_comment)
 666
 667             out_java_enum.write(out_java_enum_addendum)
 668             out_java.write(out_java_addendum)
 669             write_c(out_c_addendum)
 670
 671     def map_trait(struct_name, field_var_lines, trait_fn_lines, trait_doc_comment):
 672         with open(f"{sys.argv[3]}/structs/{struct_name.replace('LDK', '')}{consts.file_ext}", "w") as out_java_trait:
 673             field_var_convs = []
 674             flattened_field_var_convs = []
 675             for var_line in field_var_lines:
 676                 if var_line.group(1) in trait_structs:
 677                     field_var_convs.append((var_line.group(1), var_line.group(2), trait_structs[var_line.group(1)]))
 678                     flattened_field_var_convs.append((var_line.group(1), var_line.group(2), ))
 679                     flattened_field_var_convs.extend(trait_structs[var_line.group(1)])
 680                 else:
 681                     mapped = type_mapping_generator.map_type(var_line.group(1) + " " + var_line.group(2), False, None, False, False)
 682                     field_var_convs.append(mapped)
 683                     flattened_field_var_convs.append(mapped)
 684             trait_structs[struct_name] = field_var_convs
 685
 686             field_fns = []
 687             for fn_docs, fn_line in trait_fn_lines:
 688                 if fn_line == "cloned":
 689                     ret_ty_info = type_mapping_generator.map_type("void", True, None, False, False)
 690                     field_fns.append(TraitMethInfo("cloned", False, ret_ty_info, [], fn_docs))
 691                 else:
 692                     (nullable_params, ret_nullable) = doc_to_params_ret_nullable(fn_docs)
 693                     if ret_nullable:
 694                         assert False # This isn't yet handled on the Java side
 695                         ret_ty_info.nullable = True
 696                         ret_ty_info = type_mapping_generator.map_nullable_type(fn_line.group(2).strip() + " ret", True, None, False, False)
 697                     else:
 698                         ret_ty_info = type_mapping_generator.map_type(fn_line.group(2).strip() + " ret", True, None, False, False)
 699                     is_const = fn_line.group(4) is not None
 700
 701                     arg_tys = []
 702                     for idx, arg in enumerate(fn_line.group(5).split(',')):
 703                         if arg == "":
 704                             continue
 705                         arg_ty_info = type_mapping_generator.java_c_types(arg, None)
 706                         if arg_ty_info.var_name in nullable_params:
 707                             # Types that are actually null instead of all-0s aren't yet handled on the Java side:
 708                             arg_conv_info = type_mapping_generator.map_type_with_info(arg_ty_info, True, None, False, False, True)
 709                         else:
 710                             arg_conv_info = type_mapping_generator.map_type_with_info(arg_ty_info, True, None, False, False, False)
 711                         arg_tys.append(arg_conv_info)
 712                     field_fns.append(TraitMethInfo(fn_line.group(3), is_const, ret_ty_info, arg_tys, fn_docs))
 713
 714             (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)
 715             write_c(out_c_addendum)
 716             out_java_trait.write(out_java_trait_addendum)
 717             out_java.write(out_java_addendum)
 718
 719         for fn_docs, fn_line in trait_fn_lines:
 720             if fn_line == "cloned":
 721                 continue
 722             # For now, just disable enabling the _call_log - we don't know how to inverse-map String
 723             is_log = fn_line.group(3) == "log" and struct_name == "LDKLogger"
 724             if fn_line.group(3) != "free" and fn_line.group(3) != "eq" and not is_log:
 725                 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"
 726                 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)
 727         for idx, var_line in enumerate(field_var_lines):
 728             if var_line.group(1) not in trait_structs:
 729                 write_c(var_line.group(1) + " " + struct_name + "_set_get_" + var_line.group(2) + "(" + struct_name + "* this_arg) {\n")
 730                 write_c("\tif (this_arg->set_" + var_line.group(2) + " != NULL)\n")
 731                 write_c("\t\tthis_arg->set_" + var_line.group(2) + "(this_arg);\n")
 732                 write_c("\treturn this_arg->" + var_line.group(2) + ";\n")
 733                 write_c("}\n")
 734                 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"
 735                 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)
 736
 737     def map_result(struct_name, res_ty, err_ty):
 738         result_types.add(struct_name)
 739         human_ty = struct_name.replace("LDKCResult", "Result")
 740         res_map = type_mapping_generator.map_type(res_ty + " res", True, None, False, True)
 741         err_map = type_mapping_generator.map_type(err_ty + " err", True, None, False, True)
 742         java_hu_struct = consts.map_result(struct_name, res_map, err_map)
 743         create_getter(struct_name, res_ty, "ok", ("*", "->contents.result"), ("", "->result_ok"))
 744         create_getter(struct_name, err_ty, "err", ("*", "->contents.err"), ("!", "->result_ok"))
 745         with open(f"{sys.argv[3]}/structs/{human_ty}{consts.file_ext}", "w") as out_java_struct:
 746             out_java_struct.write(java_hu_struct)
 747
 748     def create_getter(struct_name, field_decl, field_name, accessor, check_sfx):
 749         field_ty = java_c_types(field_decl + " " + field_name, None)
 750         ptr_fn_defn = field_decl + " *" + struct_name.replace("LDK", "") + "_get_" + field_name + "(" + struct_name + " *NONNULL_PTR owner)"
 751         owned_fn_defn = field_decl + " " + struct_name.replace("LDK", "") + "_get_" + field_name + "(" + struct_name + " *NONNULL_PTR owner)"
 752
 753         holds_ref = False
 754         if field_ty.rust_obj is not None and field_ty.rust_obj.replace("LDK", "") + "_clone" in clone_fns:
 755             fn_defn = owned_fn_defn
 756             write_c("static inline " + fn_defn + "{\n")
 757             if check_sfx is not None:
 758                 write_c("CHECK(" + check_sfx[0] + "owner" + check_sfx[1] + ");\n")
 759             write_c("\treturn " + field_ty.rust_obj.replace("LDK", "") + "_clone(&" + accessor[0] + "owner" + accessor[1] + ");\n")
 760         elif field_ty.arr_len is not None or field_ty.is_native_primitive or field_ty.rust_obj in unitary_enums:
 761             fn_defn = owned_fn_defn
 762             write_c("static inline " + fn_defn + "{\n")
 763             if check_sfx is not None:
 764                 write_c("CHECK(" + check_sfx[0] + "owner" + check_sfx[1] + ");\n")
 765             write_c("\treturn " + accessor[0] + "owner" + accessor[1] + ";\n")
 766             holds_ref = True
 767         else:
 768             fn_defn = ptr_fn_defn
 769             write_c("static inline " + fn_defn + "{\n")
 770             if check_sfx is not None:
 771                 write_c("CHECK(" + check_sfx[0] + "owner" + check_sfx[1] + ");\n")
 772             write_c("\treturn &" + accessor[0] + "owner" + accessor[1] + ";\n")
 773             holds_ref = True
 774         write_c("}\n")
 775         dummy_line = fn_defn + ";\n"
 776         map_fn_with_ref_option(dummy_line, reg_fn_regex.match(dummy_line), None, None, "", holds_ref)
 777
 778     def map_tuple(struct_name, field_lines):
 779         human_ty = struct_name.replace("LDKC2Tuple", "TwoTuple").replace("LDKC3Tuple", "ThreeTuple")
 780         with open(f"{sys.argv[3]}/structs/{human_ty}{consts.file_ext}", "w") as out_java_struct:
 781             out_java_struct.write(consts.map_tuple(struct_name))
 782             ty_list = []
 783             for idx, (line, _) in enumerate(field_lines):
 784                 if idx != 0 and idx < len(field_lines) - 2:
 785                     ty_list.append(java_c_types(line.strip(';'), None))
 786             tuple_types[struct_name] = (ty_list, struct_name)
 787
 788         # Map virtual getter functions
 789         for idx, (line, _) in enumerate(field_lines):
 790             if idx != 0 and idx < len(field_lines) - 2:
 791                 field_name = chr(ord('a') + idx - 1)
 792                 assert line.endswith(" " + field_name + ";")
 793                 create_getter(struct_name, line[:-3].strip(), field_name, ("", "->" + field_name), None)
 794
 795     out_java.write(consts.bindings_header)
 796     with open(f"{sys.argv[2]}/version{consts.file_ext}", "w") as out_java_version:
 797         out_java_version.write(consts.bindings_version_file.replace('<git_version_ldk_garbagecollected>', local_git_version))
 798
 799     with open(f"{sys.argv[3]}/structs/CommonBase{consts.file_ext}", "w") as out_java_struct:
 800         out_java_struct.write(consts.common_base)
 801
 802     block_comment = None
 803     last_block_comment = None
 804     cur_block_obj = None
 805
 806     const_val_regex = re.compile("^extern const ([A-Za-z_0-9]*) ([A-Za-z_0-9]*);$")
 807
 808     line_indicates_result_regex = re.compile("^   union (LDKCResult_[A-Za-z_0-9]*Ptr) contents;$")
 809     line_indicates_vec_regex = re.compile("^   (struct |enum |union )?([A-Za-z_0-9]*) \*data;$")
 810     line_indicates_opaque_regex = re.compile("^   bool is_owned;$")
 811     line_indicates_trait_regex = re.compile("^   (struct |enum |union )?([A-Za-z_0-9]* \*?)\(\*([A-Za-z_0-9]*)\)\((const )?void \*this_arg(.*)\);$")
 812     assert(line_indicates_trait_regex.match("   uintptr_t (*send_data)(void *this_arg, LDKu8slice data, bool resume_read);"))
 813     assert(line_indicates_trait_regex.match("   struct LDKCVec_MessageSendEventZ (*get_and_clear_pending_msg_events)(const void *this_arg);"))
 814     assert(line_indicates_trait_regex.match("   struct LDKCVec_u8Z (*write)(const void *this_arg);"))
 815     line_indicates_trait_clone_regex = re.compile("^   void \(\*cloned\)\(struct ([A-Za-z0-9])* \*NONNULL_PTR new_[A-Za-z0-9]*\);$")
 816     assert(line_indicates_trait_clone_regex.match("   void (*cloned)(struct LDKSign *NONNULL_PTR new_Sign);"))
 817     line_field_var_regex = re.compile("^   struct ([A-Za-z_0-9]*) ([A-Za-z_0-9]*);$")
 818     assert(line_field_var_regex.match("   struct LDKMessageSendEventsProvider MessageSendEventsProvider;"))
 819     assert(line_field_var_regex.match("   struct LDKChannelPublicKeys pubkeys;"))
 820     struct_name_regex = re.compile("^typedef (struct|enum|union) (MUST_USE_STRUCT )?(LDK[A-Za-z_0-9]*) {$")
 821     assert(struct_name_regex.match("typedef struct LDKCVec_u8Z {"))
 822     assert(struct_name_regex.match("typedef enum LDKNetwork {"))
 823
 824     union_enum_items = {}
 825     result_ptr_struct_items = {}
 826     for line in in_h:
 827         if block_comment is not None:
 828             if line.endswith("*/\n"):
 829                 last_block_comment = block_comment.strip("\n")
 830                 block_comment = None
 831             else:
 832                 block_comment = block_comment + line.strip(" /*")
 833         elif cur_block_obj is not None:
 834             cur_block_obj  = cur_block_obj + line
 835             if line.startswith("} "):
 836                 field_lines = []
 837                 struct_name = None
 838                 vec_ty = None
 839                 obj_lines = cur_block_obj.split("\n")
 840                 is_opaque = False
 841                 result_contents = None
 842                 is_unitary_enum = False
 843                 is_union_enum = False
 844                 is_union = False
 845                 is_tuple = False
 846                 trait_fn_lines = []
 847                 field_var_lines = []
 848                 last_struct_block_comment = None
 849
 850                 for idx, struct_line in enumerate(obj_lines):
 851                     if struct_line.strip().startswith("/*"):
 852                         block_comment = struct_line.strip(" /*")
 853                     if block_comment is not None:
 854                         if struct_line.endswith("*/"):
 855                             last_struct_block_comment = block_comment.strip("\n")
 856                             block_comment = None
 857                         else:
 858                             block_comment = block_comment + "\n" + struct_line.strip(" /*").replace("…", "...")
 859                     else:
 860                         struct_name_match = struct_name_regex.match(struct_line)
 861                         if struct_name_match is not None:
 862                             struct_name = struct_name_match.group(3)
 863                             if struct_name_match.group(1) == "enum":
 864                                 if not struct_name.endswith("_Tag"):
 865                                     is_unitary_enum = True
 866                                 else:
 867                                     is_union_enum = True
 868                             elif struct_name_match.group(1) == "union":
 869                                 is_union = True
 870                         if line_indicates_opaque_regex.match(struct_line):
 871                             is_opaque = True
 872                         result_match = line_indicates_result_regex.match(struct_line)
 873                         if result_match is not None:
 874                             result_contents = result_match.group(1)
 875                         vec_ty_match = line_indicates_vec_regex.match(struct_line)
 876                         if vec_ty_match is not None and struct_name.startswith("LDKCVec_"):
 877                             vec_ty = vec_ty_match.group(2)
 878                         elif struct_name.startswith("LDKC2Tuple_") or struct_name.startswith("LDKC3Tuple_"):
 879                             is_tuple = True
 880                         trait_fn_match = line_indicates_trait_regex.match(struct_line)
 881                         if trait_fn_match is not None:
 882                             trait_fn_lines.append((last_struct_block_comment, trait_fn_match))
 883                         trait_clone_fn_match = line_indicates_trait_clone_regex.match(struct_line)
 884                         if trait_clone_fn_match is not None:
 885                             trait_fn_lines.append((last_struct_block_comment, "cloned"))
 886                         field_var_match = line_field_var_regex.match(struct_line)
 887                         if field_var_match is not None:
 888                             field_var_lines.append(field_var_match)
 889                         field_lines.append((struct_line, last_struct_block_comment))
 890                         last_struct_block_comment = None
 891
 892                 assert(struct_name is not None)
 893                 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))
 894                 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))
 895                 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))
 896                 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))
 897                 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))
 898                 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))
 899                 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))
 900
 901                 if is_opaque:
 902                     opaque_structs.add(struct_name)
 903                     with open(f"{sys.argv[3]}/structs/{struct_name.replace('LDK', '')}{consts.file_ext}", "w") as out_java_struct:
 904                         out_opaque_struct_human = consts.map_opaque_struct(struct_name, last_block_comment)
 905                         last_block_comment = None
 906                         out_java_struct.write(out_opaque_struct_human)
 907                 elif result_contents is not None:
 908                     assert result_contents in result_ptr_struct_items
 909                     res_ty, err_ty = result_ptr_struct_items[result_contents]
 910                     map_result(struct_name, res_ty, err_ty)
 911                 elif struct_name.startswith("LDKCResult_") and struct_name.endswith("ZPtr"):
 912                     for line, _ in field_lines:
 913                         if line.endswith("*result;"):
 914                             res_ty = line[:-8].strip()
 915                         elif line.endswith("*err;"):
 916                             err_ty = line[:-5].strip()
 917                     result_ptr_struct_items[struct_name] = (res_ty, err_ty)
 918                     result_types.add(struct_name[:-3])
 919                 elif is_tuple:
 920                     map_tuple(struct_name, field_lines)
 921                 elif vec_ty is not None:
 922                     ty_info = type_mapping_generator.map_type(vec_ty + " arr_elem", False, None, False, False)
 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 = struct_name.replace("LDK", "")
 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(consts.txout_defn)
 976                         fn_line = "struct LDKCVec_u8Z TxOut_get_script_pubkey (struct LDKTxOut* thing)"
 977                         write_c(fn_line + " {")
 978                         write_c("\treturn CVec_u8Z_clone(&thing->script_pubkey);")
 979                         write_c("}")
 980                         map_fn(fn_line + "\n", re.compile("(.*) (TxOut_get_script_pubkey) \((.*)\)").match(fn_line), None, None, None)
 981                         fn_line = "uint64_t TxOut_get_value (struct LDKTxOut* thing)"
 982                         write_c(fn_line + " {")
 983                         write_c("\treturn thing->value;")
 984                         write_c("}")
 985                         map_fn(fn_line + "\n", re.compile("(.*) (TxOut_get_value) \((.*)\)").match(fn_line), None, None, None)
 986                 else:
 987                     pass # Everything remaining is a byte[] or some form
 988                 cur_block_obj = None
 989         else:
 990             fn_ptr = fn_ptr_regex.match(line)
 991             fn_ret_arr = fn_ret_arr_regex.match(line)
 992             reg_fn = reg_fn_regex.match(line)
 993             const_val = const_val_regex.match(line)
 994
 995             if line.startswith("#include <"):
 996                 pass
 997             elif line.startswith("/*"):
 998                 if not line.endswith("*/\n"):
 999                     block_comment = line.strip(" /*")
1000             elif line.startswith("typedef enum "):
1001                 cur_block_obj = line
1002             elif line.startswith("typedef struct "):
1003                 cur_block_obj = line
1004             elif line.startswith("typedef union "):
1005                 cur_block_obj = line
1006             elif fn_ptr is not None:
1007                 map_fn(line, fn_ptr, None, None, last_block_comment)
1008                 last_block_comment = None
1009             elif fn_ret_arr is not None:
1010                 map_fn(line, fn_ret_arr, fn_ret_arr.group(4), None, last_block_comment)
1011                 last_block_comment = None
1012             elif reg_fn is not None:
1013                 map_fn(line, reg_fn, None, None, last_block_comment)
1014                 last_block_comment = None
1015             elif const_val_regex is not None:
1016                 # TODO Map const variables
1017                 pass
1018             else:
1019                 assert(line == "\n")
1020
1021     out_java.write(consts.bindings_footer)
1022     for struct_name in opaque_structs:
1023         with open(f"{sys.argv[3]}/structs/{struct_name.replace('LDK', '')}{consts.file_ext}", "a") as out_java_struct:
1024             out_java_struct.write("}\n")
1025     for struct_name in trait_structs:
1026         with open(f"{sys.argv[3]}/structs/{struct_name.replace('LDK', '')}{consts.file_ext}", "a") as out_java_struct:
1027             out_java_struct.write("}\n")
1028     for struct_name in complex_enums:
1029         with open(f"{sys.argv[3]}/structs/{struct_name.replace('LDK', '').replace('COption', 'Option')}{consts.file_ext}", "a") as out_java_struct:
1030             out_java_struct.write("}\n")
1031     for struct_name in result_types:
1032         with open(f"{sys.argv[3]}/structs/{struct_name.replace('LDKCResult', 'Result')}{consts.file_ext}", "a") as out_java_struct:
1033             out_java_struct.write("}\n")
1034     for struct_name in tuple_types:
1035         struct_hu_name = struct_name.replace("LDKC2Tuple", "TwoTuple").replace("LDKC3Tuple", "ThreeTuple")
1036         with open(f"{sys.argv[3]}/structs/{struct_hu_name}{consts.file_ext}", "a") as out_java_struct:
1037             out_java_struct.write("}\n")
1038
1039 with open(f"{sys.argv[4]}/bindings.c.body", "w") as out_c:
1040     out_c.write(consts.c_file_pfx)
1041     out_c.write(consts.init_str())
1042     out_c.write(c_file)
1043 with open(f"{sys.argv[4]}/version.c", "w") as out_c:
1044     out_c.write(consts.c_version_file.replace('<git_version_ldk_garbagecollected>', local_git_version))
1045 with open(f"{sys.argv[3]}/structs/UtilMethods{consts.file_ext}", "a") as util:
1046     util.write(consts.util_fn_sfx)
1047 consts.cleanup()