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