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