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