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

   1 #!/usr/bin/env python3
   2 import sys, re
   3
   4 if len(sys.argv) != 4:
   5     print("USAGE: /path/to/lightning.h /path/to/bindings/output.java /path/to/bindings/output.c")
   6     sys.exit(1)
   7
   8 class TypeInfo:
   9     def __init__(self, rust_obj, java_ty, java_fn_ty_arg, c_ty, passed_as_ptr, is_ptr, var_name, arr_len):
  10         self.rust_obj = rust_obj
  11         self.java_ty = java_ty
  12         self.java_fn_ty_arg = java_fn_ty_arg
  13         self.c_ty = c_ty
  14         self.passed_as_ptr = passed_as_ptr
  15         self.is_ptr = is_ptr
  16         self.var_name = var_name
  17         self.arr_len = arr_len
  18
  19 class ConvInfo:
  20     def __init__(self, ty_info, arg_name, arg_conv, arg_conv_name, ret_conv, ret_conv_name):
  21         assert(ty_info.c_ty is not None)
  22         assert(ty_info.java_ty is not None)
  23         assert(arg_name is not None)
  24         self.c_ty = ty_info.c_ty
  25         self.java_ty = ty_info.java_ty
  26         self.java_fn_ty_arg = ty_info.java_fn_ty_arg
  27         self.arg_name = arg_name
  28         self.arg_conv = arg_conv
  29         self.arg_conv_name = arg_conv_name
  30         self.ret_conv = ret_conv
  31         self.ret_conv_name = ret_conv_name
  32
  33     def print_ty(self):
  34         out_c.write(self.c_ty)
  35         out_java.write(self.java_ty)
  36
  37     def print_name(self):
  38         if self.arg_name != "":
  39             out_java.write(" " + self.arg_name)
  40             out_c.write(" " + self.arg_name)
  41         else:
  42             out_java.write(" arg")
  43             out_c.write(" arg")
  44
  45 with open(sys.argv[1]) as in_h, open(sys.argv[2], "w") as out_java, open(sys.argv[3], "w") as out_c:
  46     opaque_structs = set()
  47
  48     var_is_arr_regex = re.compile("\(\*([A-za-z_]*)\)\[([0-9]*)\]")
  49     var_ty_regex = re.compile("([A-za-z_0-9]*)(.*)")
  50     def java_c_types(fn_arg, ret_arr_len):
  51         fn_arg = fn_arg.strip()
  52         if fn_arg.startswith("MUST_USE_RES "):
  53             fn_arg = fn_arg[13:]
  54         is_const = False
  55         if fn_arg.startswith("const "):
  56             fn_arg = fn_arg[6:]
  57             is_const = True
  58
  59         is_ptr = False
  60         take_by_ptr = False
  61         rust_obj = None
  62         if fn_arg.startswith("void"):
  63             java_ty = "void"
  64             c_ty = "void"
  65             fn_ty_arg = "V"
  66             fn_arg = fn_arg[4:].strip()
  67         elif fn_arg.startswith("bool"):
  68             java_ty = "boolean"
  69             c_ty = "jboolean"
  70             fn_ty_arg = "Z"
  71             fn_arg = fn_arg[4:].strip()
  72         elif fn_arg.startswith("uint8_t"):
  73             java_ty = "byte"
  74             c_ty = "jbyte"
  75             fn_ty_arg = "B"
  76             fn_arg = fn_arg[7:].strip()
  77         elif fn_arg.startswith("uint16_t"):
  78             java_ty = "short"
  79             c_ty = "jshort"
  80             fn_ty_arg = "S"
  81             fn_arg = fn_arg[8:].strip()
  82         elif fn_arg.startswith("uint32_t"):
  83             java_ty = "int"
  84             c_ty = "jint"
  85             fn_ty_arg = "I"
  86             fn_arg = fn_arg[8:].strip()
  87         elif fn_arg.startswith("uint64_t"):
  88             java_ty = "long"
  89             c_ty = "jlong"
  90             fn_ty_arg = "J"
  91             fn_arg = fn_arg[8:].strip()
  92         elif is_const and fn_arg.startswith("char *"):
  93             java_ty = "String"
  94             c_ty = "const char*"
  95             fn_ty_arg = "Ljava/lang/String;"
  96             fn_arg = fn_arg[6:].strip()
  97         else:
  98             ma = var_ty_regex.match(fn_arg)
  99             java_ty = "long"
 100             c_ty = "jlong"
 101             fn_ty_arg = "J"
 102             fn_arg = ma.group(2).strip()
 103             rust_obj = ma.group(1).strip()
 104             take_by_ptr = True
 105
 106         if fn_arg.startswith(" *") or fn_arg.startswith("*"):
 107             fn_arg = fn_arg.replace("*", "").strip()
 108             is_ptr = True
 109             c_ty = "jlong"
 110             java_ty = "long"
 111
 112         var_is_arr = var_is_arr_regex.match(fn_arg)
 113         if var_is_arr is not None or ret_arr_len is not None:
 114             assert(not take_by_ptr)
 115             assert(not is_ptr)
 116             java_ty = java_ty + "[]"
 117             c_ty = c_ty + "Array"
 118             if var_is_arr is not None:
 119                 return TypeInfo(rust_obj=None, java_ty=java_ty, java_fn_ty_arg="[" + fn_ty_arg, c_ty=c_ty,
 120                     passed_as_ptr=False, is_ptr=False, var_name=var_is_arr.group(1), arr_len=var_is_arr.group(2))
 121         return TypeInfo(rust_obj=rust_obj, java_ty=java_ty, java_fn_ty_arg=fn_ty_arg, c_ty=c_ty, passed_as_ptr=is_ptr or take_by_ptr,
 122             is_ptr=is_ptr, var_name=fn_arg, arr_len=None)
 123
 124     def map_type(fn_arg, print_void, ret_arr_len, is_free):
 125         ty_info = java_c_types(fn_arg, ret_arr_len)
 126
 127         if ty_info.c_ty == "void":
 128             if not print_void:
 129                 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 130                     arg_conv = None, arg_conv_name = None, ret_conv = None, ret_conv_name = None)
 131
 132         if ty_info.c_ty.endswith("Array"):
 133             arr_len = ty_info.arr_len
 134             if arr_len is not None:
 135                 arr_name = ty_info.var_name
 136             else:
 137                 arr_name = "ret"
 138                 arr_len = ret_arr_len
 139             assert(ty_info.c_ty == "jbyteArray")
 140             return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 141                 arg_conv = "unsigned char " + arr_name + "_arr[" + arr_len + "];\n" +
 142                     "(*_env)->GetByteArrayRegion (_env, """ + arr_name + ", 0, " + arr_len + ", " + arr_name + "_arr);\n" +
 143                     "unsigned char (*""" + arr_name + "_ref)[" + arr_len + "] = &" + arr_name + "_arr;",
 144                 arg_conv_name = arr_name + "_ref",
 145                 ret_conv = ("jbyteArray " + arr_name + "_arr = (*_env)->NewByteArray(_env, " + arr_len + ");\n" +
 146                     "(*_env)->SetByteArrayRegion(_env, " + arr_name + "_arr, 0, " + arr_len + ", *",
 147                     ");"),
 148                 ret_conv_name = arr_name + "_arr")
 149         elif ty_info.var_name != "":
 150             # If we have a parameter name, print it (noting that it may indicate its a pointer)
 151             if ty_info.rust_obj is not None:
 152                 assert(ty_info.passed_as_ptr)
 153                 if not ty_info.is_ptr:
 154                     base_conv = ty_info.rust_obj + " " + ty_info.var_name + "_conv = *(" + ty_info.rust_obj + "*)" + ty_info.var_name + ";\nfree((void*)" + ty_info.var_name + ");";
 155                     if ty_info.rust_obj in opaque_structs:
 156                         return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 157                             arg_conv = base_conv + "\n" + ty_info.var_name + "_conv._underlying_ref = false;",
 158                             arg_conv_name = ty_info.var_name + "_conv",
 159                             ret_conv = None, ret_conv_name = None)
 160                     return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 161                         arg_conv = base_conv, arg_conv_name = ty_info.var_name + "_conv",
 162                         ret_conv = None, ret_conv_name = None)
 163                 else:
 164                     assert(not is_free)
 165                     return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 166                         arg_conv = ty_info.rust_obj + "* " + ty_info.var_name + "_conv = (" + ty_info.rust_obj + "*)" + ty_info.var_name + ";",
 167                         arg_conv_name = ty_info.var_name + "_conv",
 168                         ret_conv = None, ret_conv_name = None)
 169             elif ty_info.is_ptr:
 170                 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 171                     arg_conv = None, arg_conv_name = ty_info.var_name, ret_conv = None, ret_conv_name = None)
 172             elif ty_info.java_ty == "String":
 173                 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 174                     arg_conv = None, arg_conv_name = None,
 175                     ret_conv = ("jstring " + ty_info.var_name + "_conv = (*_env)->NewStringUTF(_env, ", ");"), ret_conv_name = ty_info.var_name + "_conv")
 176             else:
 177                 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 178                     arg_conv = None, arg_conv_name = ty_info.var_name, ret_conv = None, ret_conv_name = None)
 179         elif not print_void:
 180             # We don't have a parameter name, and want one, just call it arg
 181             if ty_info.rust_obj is not None:
 182                 assert(not is_free or ty_info.rust_obj not in opaque_structs);
 183                 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 184                     arg_conv = ty_info.rust_obj + " arg_conv = *(" + ty_info.rust_obj + "*)arg;\nfree((void*)arg);",
 185                     arg_conv_name = "arg_conv",
 186                     ret_conv = None, ret_conv_name = None)
 187             else:
 188                 assert(not is_free)
 189                 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 190                     arg_conv = None, arg_conv_name = "arg", ret_conv = None, ret_conv_name = None)
 191         else:
 192             # We don't have a parameter name, and don't want one (cause we're returning)
 193             if ty_info.rust_obj is not None:
 194                 if not ty_info.is_ptr:
 195                     if ty_info.rust_obj in opaque_structs:
 196                         # If we're returning a newly-allocated struct, we don't want Rust to ever
 197                         # free, instead relying on the Java GC to lose the ref. We undo this in
 198                         # any _free function.
 199                         # To avoid any issues, we first assert that the incoming object is non-ref.
 200                         return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 201                             ret_conv = (ty_info.rust_obj + "* ret = malloc(sizeof(" + ty_info.rust_obj + "));\n*ret = ", ";\nassert(!ret->_underlying_ref);\nret->_underlying_ref = true;"),
 202                             ret_conv_name = "(long)ret",
 203                             arg_conv = None, arg_conv_name = None)
 204                     else:
 205                         return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 206                             ret_conv = (ty_info.rust_obj + "* ret = malloc(sizeof(" + ty_info.rust_obj + "));\n*ret = ", ";"),
 207                             ret_conv_name = "(long)ret",
 208                             arg_conv = None, arg_conv_name = None)
 209                 else:
 210                     return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 211                         ret_conv = ("long ret = (long)", ";"), ret_conv_name = "ret",
 212                         arg_conv = None, arg_conv_name = None)
 213             else:
 214                 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
 215                     arg_conv = None, arg_conv_name = None, ret_conv = None, ret_conv_name = None)
 216
 217     def map_fn(re_match, ret_arr_len):
 218         out_java.write("\t/// " + line)
 219         out_java.write("\tpublic static native ")
 220         out_c.write("JNIEXPORT ")
 221
 222         ret_info = map_type(re_match.group(1), True, ret_arr_len, False)
 223         ret_info.print_ty()
 224         if ret_info.ret_conv is not None:
 225             ret_conv_pfx, ret_conv_sfx = ret_info.ret_conv
 226
 227         out_java.write(" " + re_match.group(2) + "(")
 228         out_c.write(" JNICALL Java_org_ldk_impl_bindings_" + re_match.group(2).replace('_', '_1') + "(JNIEnv * _env, jclass _b")
 229
 230         arg_names = []
 231         for idx, arg in enumerate(re_match.group(3).split(',')):
 232             if idx != 0:
 233                 out_java.write(", ")
 234             if arg != "void":
 235                 out_c.write(", ")
 236             arg_conv_info = map_type(arg, False, None, re_match.group(2).endswith("_free"))
 237             if arg_conv_info.c_ty != "void":
 238                 arg_conv_info.print_ty()
 239                 arg_conv_info.print_name()
 240             arg_names.append(arg_conv_info)
 241
 242         out_java.write(");\n")
 243         out_c.write(") {\n")
 244
 245         for info in arg_names:
 246             if info.arg_conv is not None:
 247                 out_c.write("\t" + info.arg_conv.replace('\n', "\n\t") + "\n");
 248
 249         if ret_info.ret_conv is not None:
 250             out_c.write("\t" + ret_conv_pfx.replace('\n', '\n\t'));
 251         else:
 252             out_c.write("\treturn ");
 253
 254         out_c.write(re_match.group(2) + "(")
 255         for idx, info in enumerate(arg_names):
 256             if info.arg_conv_name is not None:
 257                 if idx != 0:
 258                     out_c.write(", ")
 259                 out_c.write(info.arg_conv_name)
 260         out_c.write(")")
 261         if ret_info.ret_conv is not None:
 262             out_c.write(ret_conv_sfx.replace('\n', '\n\t'))
 263             out_c.write("\n\treturn " + ret_info.ret_conv_name + ";")
 264         else:
 265             out_c.write(";")
 266         out_c.write("\n}\n\n")
 267
 268     out_java.write("""package org.ldk.impl;
 269
 270 public class bindings {
 271         static {
 272                 System.loadLibrary(\"lightningjni\");
 273         }
 274
 275 """)
 276     out_c.write("#include \"org_ldk_impl_bindings.h\"\n")
 277     out_c.write("#include <rust_types.h>\n")
 278     out_c.write("#include <lightning.h>\n")
 279     out_c.write("#include <assert.h>\n\n")
 280     out_c.write("#include <string.h>\n\n")
 281
 282     in_block_comment = False
 283     in_block_enum = False
 284     cur_block_struct = None
 285     in_block_union = False
 286
 287     fn_ptr_regex = re.compile("^extern const ([A-Za-z_0-9\* ]*) \(\*(.*)\)\((.*)\);$")
 288     fn_ret_arr_regex = re.compile("(.*) \(\*(.*)\((.*)\)\)\[([0-9]*)\];$")
 289     reg_fn_regex = re.compile("([A-Za-z_0-9\* ]* \*?)([a-zA-Z_0-9]*)\((.*)\);$")
 290     const_val_regex = re.compile("^extern const ([A-Za-z_0-9]*) ([A-Za-z_0-9]*);$")
 291
 292     line_indicates_opaque_regex = re.compile("^   bool _underlying_ref;$")
 293     line_indicates_trait_regex = re.compile("^   ([A-Za-z_0-9]* \*?)\(\*([A-Za-z_0-9]*)\)\((const )?void \*this_arg(.*)\);$")
 294     assert(line_indicates_trait_regex.match("   uintptr_t (*send_data)(void *this_arg, LDKu8slice data, bool resume_read);"))
 295     assert(line_indicates_trait_regex.match("   LDKCVec_MessageSendEventZ (*get_and_clear_pending_msg_events)(const void *this_arg);"))
 296     assert(line_indicates_trait_regex.match("   void *(*clone)(const void *this_arg);"))
 297     struct_name_regex = re.compile("^typedef struct (MUST_USE_STRUCT )?(LDK[A-Za-z_0-9]*) {$")
 298     assert(struct_name_regex.match("typedef struct LDKCVecTempl_u8 {"))
 299
 300     for line in in_h:
 301         if in_block_comment:
 302             #out_java.write("\t" + line)
 303             if line.endswith("*/\n"):
 304                 in_block_comment = False
 305         elif cur_block_struct is not None:
 306             cur_block_struct  = cur_block_struct + line
 307             if line.startswith("} "):
 308                 field_lines = []
 309                 struct_name = None
 310                 struct_lines = cur_block_struct.split("\n")
 311                 is_opaque = False
 312                 trait_fn_lines = []
 313
 314                 for idx, struct_line in enumerate(struct_lines):
 315                     if struct_line.strip().startswith("/*"):
 316                         in_block_comment = True
 317                     if in_block_comment:
 318                         if struct_line.endswith("*/"):
 319                             in_block_comment = False
 320                     else:
 321                         struct_name_match = struct_name_regex.match(struct_line)
 322                         if struct_name_match is not None:
 323                             struct_name = struct_name_match.group(2)
 324                         if line_indicates_opaque_regex.match(struct_line):
 325                             is_opaque = True
 326                         trait_fn_match = line_indicates_trait_regex.match(struct_line)
 327                         if trait_fn_match is not None:
 328                             trait_fn_lines.append(trait_fn_match)
 329                         field_lines.append(struct_line)
 330
 331                 assert(struct_name is not None)
 332                 assert(len(trait_fn_lines) == 0 or not is_opaque)
 333                 if is_opaque:
 334                     opaque_structs.add(struct_name)
 335                 if len(trait_fn_lines) > 0:
 336                     out_c.write("typedef struct " + struct_name + "_JCalls {\n")
 337                     out_c.write("\tJNIEnv *env;\n")
 338                     out_c.write("\tjobject o;\n")
 339                     for fn_line in trait_fn_lines:
 340                         if fn_line.group(2) != "free" and fn_line.group(2) != "clone":
 341                             out_c.write("\tjmethodID " + fn_line.group(2) + "_meth;\n")
 342                     out_c.write("} " + struct_name + "_JCalls;\n")
 343
 344                     out_java.write("\tpublic interface " + struct_name + " {\n")
 345                     java_meths = []
 346                     for fn_line in trait_fn_lines:
 347                         java_meth_descr = "("
 348                         if fn_line.group(2) != "free" and fn_line.group(2) != "clone":
 349                             ret_ty_info = java_c_types(fn_line.group(1), None)
 350
 351                             out_java.write("\t\t " + ret_ty_info.java_ty + " " + fn_line.group(2) + "(")
 352                             is_const = fn_line.group(3) is not None
 353                             out_c.write(fn_line.group(1) + fn_line.group(2) + "_jcall(")
 354                             if is_const:
 355                                 out_c.write("const void* this_arg")
 356                             else:
 357                                 out_c.write("void* this_arg")
 358
 359                             arg_names = []
 360                             for idx, arg in enumerate(fn_line.group(4).split(',')):
 361                                 if arg == "":
 362                                     continue
 363                                 if idx >= 2:
 364                                     out_java.write(", ")
 365                                 out_c.write(", ")
 366                                 arg_conv_info = map_type(arg, True, None, False)
 367                                 out_c.write(arg.strip())
 368                                 out_java.write(arg_conv_info.java_ty + " " + arg_conv_info.arg_name)
 369                                 arg_names.append(arg_conv_info)
 370                                 java_meth_descr = java_meth_descr + arg_conv_info.java_fn_ty_arg
 371                             java_meth_descr = java_meth_descr + ")" + ret_ty_info.java_fn_ty_arg
 372                             java_meths.append(java_meth_descr)
 373
 374                             out_java.write(");\n")
 375                             out_c.write(") {\n")
 376                             out_c.write("\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n")
 377
 378                             for arg_info in arg_names:
 379                                 if arg_info.ret_conv is not None:
 380                                     out_c.write("\t" + arg_info.ret_conv[0].replace('\n', '\n\t').replace("_env", "j_calls->env"));
 381                                     out_c.write(arg_info.arg_name)
 382                                     out_c.write(arg_info.ret_conv[1].replace('\n', '\n\t').replace("_env", "j_calls->env") + "\n")
 383
 384                             if not ret_ty_info.passed_as_ptr:
 385                                 out_c.write("\treturn (*j_calls->env)->Call" + ret_ty_info.java_ty.title() + "Method(j_calls->env, j_calls->o, j_calls->" + fn_line.group(2) + "_meth")
 386                             else:
 387                                 out_c.write("\t" + fn_line.group(1).strip() + "* ret = (" + fn_line.group(1).strip() + "*)(*j_calls->env)->CallLongMethod(j_calls->env, j_calls->o, j_calls->" + fn_line.group(2) + "_meth");
 388
 389                             for arg_info in arg_names:
 390                                 if arg_info.ret_conv is not None:
 391                                     out_c.write(", " + arg_info.ret_conv_name)
 392                                 else:
 393                                     out_c.write(", " + arg_info.arg_name)
 394                             out_c.write(");\n");
 395
 396                             if ret_ty_info.passed_as_ptr:
 397                                 out_c.write("\t" + fn_line.group(1).strip() + " res = *ret;\n")
 398                                 out_c.write("\tfree(ret);\n")
 399                                 out_c.write("\treturn res;\n")
 400                             out_c.write("}\n")
 401                         elif fn_line.group(2) == "free":
 402                             out_c.write("void " + struct_name + "_JCalls_free(void* this_arg) {\n")
 403                             out_c.write("\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n")
 404                             out_c.write("\t(*j_calls->env)->DeleteGlobalRef(j_calls->env, j_calls->o);\n")
 405                             out_c.write("\tfree(j_calls);\n")
 406                             out_c.write("}\n")
 407                         elif fn_line.group(2) == "clone":
 408                             out_c.write("void* " + struct_name + "_JCalls_clone(const void* this_arg) {\n")
 409                             out_c.write("\t" + struct_name + "_JCalls *ret = malloc(sizeof(" + struct_name + "_JCalls));\n")
 410                             out_c.write("\tmemcpy(ret, this_arg, sizeof(" + struct_name + "_JCalls));\n")
 411                             out_c.write("\treturn ret;\n")
 412                             out_c.write("}\n")
 413                     out_java.write("\t}\n")
 414                     out_java.write("\tpublic static native long " + struct_name + "_new(" + struct_name + " impl);\n")
 415
 416                     out_c.write("JNIEXPORT long JNICALL Java_org_ldk_impl_bindings_" + struct_name.replace("_", "_1") + "_1new (JNIEnv * env, jclass _a, jobject o) {\n")
 417                     out_c.write("\tjclass c = (*env)->GetObjectClass(env, o);\n")
 418                     out_c.write("\tassert(c != NULL);\n")
 419                     out_c.write("\t" + struct_name + "_JCalls *calls = malloc(sizeof(" + struct_name + "_JCalls));\n")
 420                     out_c.write("\tcalls->env = env;\n")
 421                     out_c.write("\tcalls->o = (*env)->NewGlobalRef(env, o);\n")
 422                     for (fn_line, java_meth_descr) in zip(trait_fn_lines, java_meths):
 423                         if fn_line.group(2) != "free" and fn_line.group(2) != "clone":
 424                             out_c.write("\tcalls->" + fn_line.group(2) + "_meth = (*env)->GetMethodID(env, c, \"" + fn_line.group(2) + "\", \"" + java_meth_descr + "\");\n")
 425                             out_c.write("\tassert(calls->" + fn_line.group(2) + "_meth != NULL);\n")
 426                     out_c.write("\n\t" + struct_name + " *ret = malloc(sizeof(" + struct_name + "));\n")
 427                     out_c.write("\tret->this_arg = (void*) calls;\n")
 428                     for fn_line in trait_fn_lines:
 429                         if fn_line.group(2) != "free" and fn_line.group(2) != "clone":
 430                             out_c.write("\tret->" + fn_line.group(2) + " = " + fn_line.group(2) + "_jcall;\n")
 431                         elif fn_line.group(2) == "free":
 432                             out_c.write("\tret->free = " + struct_name + "_JCalls_free;\n")
 433                         else:
 434                             out_c.write("\tret->clone = " + struct_name + "_JCalls_clone;\n")
 435                     out_c.write("\treturn (long)ret;\n")
 436                     out_c.write("}\n\n")
 437
 438                     #out_java.write("/* " + "\n".join(field_lines) + "*/\n")
 439                 cur_block_struct = None
 440         elif in_block_union:
 441             if line.startswith("} "):
 442                 in_block_union = False
 443         elif in_block_enum:
 444             if line.startswith("} "):
 445                 in_block_enum = False
 446         else:
 447             fn_ptr = fn_ptr_regex.match(line)
 448             fn_ret_arr = fn_ret_arr_regex.match(line)
 449             reg_fn = reg_fn_regex.match(line)
 450             const_val = const_val_regex.match(line)
 451
 452             if line.startswith("#include <"):
 453                 pass
 454             elif line.startswith("/*"):
 455                 #out_java.write("\t" + line)
 456                 if not line.endswith("*/\n"):
 457                     in_block_comment = True
 458             elif line.startswith("typedef enum "):
 459                 in_block_enum = True
 460             elif line.startswith("typedef struct "):
 461                 cur_block_struct = line
 462             elif line.startswith("typedef union "):
 463                 in_block_union = True
 464             elif line.startswith("typedef "):
 465                 pass
 466             elif fn_ptr is not None:
 467                 map_fn(fn_ptr, None)
 468             elif fn_ret_arr is not None:
 469                 map_fn(fn_ret_arr, fn_ret_arr.group(4))
 470             elif reg_fn is not None:
 471                 map_fn(reg_fn, None)
 472             elif const_val_regex is not None:
 473                 # TODO Map const variables
 474                 pass
 475             else:
 476                 assert(line == "\n")
 477
 478     out_java.write("}\n")