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

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