5 print("USAGE: /path/to/lightning.h /path/to/bindings/output.java /path/to/bindings/ /path/to/bindings/output.c debug")
6 print("debug should be true or false and indicates whether to track allocations and ensure we don't leak")
10 def __init__(self, rust_obj, java_ty, java_fn_ty_arg, c_ty, passed_as_ptr, is_ptr, var_name, arr_len, arr_access):
11 self.rust_obj = rust_obj
12 self.java_ty = java_ty
13 self.java_fn_ty_arg = java_fn_ty_arg
15 self.passed_as_ptr = passed_as_ptr
17 self.var_name = var_name
18 self.arr_len = arr_len
19 self.arr_access = arr_access
22 def __init__(self, ty_info, arg_name, arg_conv, arg_conv_name, arg_conv_cleanup, ret_conv, ret_conv_name):
23 assert(ty_info.c_ty is not None)
24 assert(ty_info.java_ty is not None)
25 assert(arg_name is not None)
26 self.passed_as_ptr = ty_info.passed_as_ptr
27 self.rust_obj = ty_info.rust_obj
28 self.c_ty = ty_info.c_ty
29 self.java_ty = ty_info.java_ty
30 self.java_fn_ty_arg = ty_info.java_fn_ty_arg
31 self.arg_name = arg_name
32 self.arg_conv = arg_conv
33 self.arg_conv_name = arg_conv_name
34 self.arg_conv_cleanup = arg_conv_cleanup
35 self.ret_conv = ret_conv
36 self.ret_conv_name = ret_conv_name
39 out_c.write(self.c_ty)
40 out_java.write(self.java_ty)
43 if self.arg_name != "":
44 out_java.write(" " + self.arg_name)
45 out_c.write(" " + self.arg_name)
47 out_java.write(" arg")
49 fn_ptr_regex = re.compile("^extern const ([A-Za-z_0-9\* ]*) \(\*(.*)\)\((.*)\);$")
50 fn_ret_arr_regex = re.compile("(.*) \(\*(.*)\((.*)\)\)\[([0-9]*)\];$")
51 reg_fn_regex = re.compile("([A-Za-z_0-9\* ]* \*?)([a-zA-Z_0-9]*)\((.*)\);$")
53 with open(sys.argv[1]) as in_h:
55 reg_fn = reg_fn_regex.match(line)
56 if reg_fn is not None:
57 if reg_fn.group(2).endswith("_clone"):
58 clone_fns.add(reg_fn.group(2))
60 arr_fn = fn_ret_arr_regex.match(line)
61 if arr_fn is not None:
62 if arr_fn.group(2).endswith("_clone"):
63 clone_fns.add(arr_fn.group(2))
66 with open(sys.argv[1]) as in_h, open(sys.argv[2], "w") as out_java, open(sys.argv[4], "w") as out_c:
67 opaque_structs = set()
71 def camel_to_snake(s):
72 # Convert camel case to snake case, in a way that appears to match cbindgen
78 if lastchar.isupper():
79 if not char.isupper() and not lastund:
84 ret = ret + lastchar.lower()
87 if char.isupper() and not lastund:
95 return (ret + lastchar.lower()).strip("_")
97 var_is_arr_regex = re.compile("\(\*([A-za-z0-9_]*)\)\[([a-z0-9]*)\]")
98 var_ty_regex = re.compile("([A-za-z_0-9]*)(.*)")
99 def java_c_types(fn_arg, ret_arr_len):
100 fn_arg = fn_arg.strip()
101 if fn_arg.startswith("MUST_USE_RES "):
104 if fn_arg.startswith("const "):
112 if fn_arg.startswith("LDKThirtyTwoBytes"):
113 fn_arg = "uint8_t (*" + fn_arg[18:] + ")[32]"
114 assert var_is_arr_regex.match(fn_arg[8:])
115 rust_obj = "LDKThirtyTwoBytes"
117 if fn_arg.startswith("LDKPublicKey"):
118 fn_arg = "uint8_t (*" + fn_arg[13:] + ")[33]"
119 assert var_is_arr_regex.match(fn_arg[8:])
120 rust_obj = "LDKPublicKey"
121 arr_access = "compressed_form"
122 if fn_arg.startswith("LDKSecretKey"):
123 fn_arg = "uint8_t (*" + fn_arg[13:] + ")[32]"
124 assert var_is_arr_regex.match(fn_arg[8:])
125 rust_obj = "LDKSecretKey"
127 if fn_arg.startswith("LDKSignature"):
128 fn_arg = "uint8_t (*" + fn_arg[13:] + ")[64]"
129 assert var_is_arr_regex.match(fn_arg[8:])
130 rust_obj = "LDKSignature"
131 arr_access = "compact_form"
132 if fn_arg.startswith("LDKThreeBytes"):
133 fn_arg = "uint8_t (*" + fn_arg[14:] + ")[3]"
134 assert var_is_arr_regex.match(fn_arg[8:])
135 rust_obj = "LDKThreeBytes"
137 if fn_arg.startswith("LDKu8slice"):
138 fn_arg = "uint8_t (*" + fn_arg[11:] + ")[datalen]"
139 assert var_is_arr_regex.match(fn_arg[8:])
140 rust_obj = "LDKu8slice"
143 if fn_arg.startswith("void"):
147 fn_arg = fn_arg[4:].strip()
148 elif fn_arg.startswith("bool"):
152 fn_arg = fn_arg[4:].strip()
153 elif fn_arg.startswith("uint8_t"):
157 fn_arg = fn_arg[7:].strip()
158 elif fn_arg.startswith("uint16_t"):
162 fn_arg = fn_arg[8:].strip()
163 elif fn_arg.startswith("uint32_t"):
167 fn_arg = fn_arg[8:].strip()
168 elif fn_arg.startswith("uint64_t") or fn_arg.startswith("uintptr_t"):
172 if fn_arg.startswith("uint64_t"):
173 fn_arg = fn_arg[8:].strip()
175 fn_arg = fn_arg[9:].strip()
176 elif is_const and fn_arg.startswith("char *"):
179 fn_ty_arg = "Ljava/lang/String;"
180 fn_arg = fn_arg[6:].strip()
182 ma = var_ty_regex.match(fn_arg)
183 if ma.group(1).strip() in unitary_enums:
184 java_ty = ma.group(1).strip()
186 fn_ty_arg = "Lorg/ldk/enums/" + ma.group(1).strip() + ";"
187 fn_arg = ma.group(2).strip()
188 rust_obj = ma.group(1).strip()
194 fn_arg = ma.group(2).strip()
195 rust_obj = ma.group(1).strip()
198 if fn_arg.startswith(" *") or fn_arg.startswith("*"):
199 fn_arg = fn_arg.replace("*", "").strip()
205 var_is_arr = var_is_arr_regex.match(fn_arg)
206 if var_is_arr is not None or ret_arr_len is not None:
207 assert(not take_by_ptr)
209 java_ty = java_ty + "[]"
210 c_ty = c_ty + "Array"
211 if var_is_arr is not None:
212 if var_is_arr.group(1) == "":
213 return TypeInfo(rust_obj=rust_obj, java_ty=java_ty, java_fn_ty_arg="[" + fn_ty_arg, c_ty=c_ty,
214 passed_as_ptr=False, is_ptr=False, var_name="arg", arr_len=var_is_arr.group(2), arr_access=arr_access)
215 return TypeInfo(rust_obj=rust_obj, java_ty=java_ty, java_fn_ty_arg="[" + fn_ty_arg, c_ty=c_ty,
216 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)
217 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,
218 is_ptr=is_ptr, var_name=fn_arg, arr_len=None, arr_access=None)
220 def map_type(fn_arg, print_void, ret_arr_len, is_free):
221 ty_info = java_c_types(fn_arg, ret_arr_len)
223 if ty_info.c_ty == "void":
225 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
226 arg_conv = None, arg_conv_name = None, arg_conv_cleanup = None,
227 ret_conv = None, ret_conv_name = None)
229 if ty_info.c_ty.endswith("Array"):
230 arr_len = ty_info.arr_len
231 if arr_len is not None:
232 arr_name = ty_info.var_name
235 arr_len = ret_arr_len
236 assert(ty_info.c_ty == "jbyteArray")
237 ret_conv = ("jbyteArray " + arr_name + "_arr = (*_env)->NewByteArray(_env, " + arr_len + ");\n" + "(*_env)->SetByteArrayRegion(_env, " + arr_name + "_arr, 0, " + arr_len + ", ", "")
238 arg_conv_cleanup = None
239 if not arr_len.isdigit():
240 arg_conv = ty_info.rust_obj + " " + arr_name + "_ref;\n"
241 arg_conv = arg_conv + arr_name + "_ref." + ty_info.arr_access + " = (*_env)->GetByteArrayElements (_env, " + arr_name + ", NULL);\n"
242 arg_conv = arg_conv + arr_name + "_ref." + arr_len + " = (*_env)->GetArrayLength (_env, " + arr_name + ");"
243 arg_conv_cleanup = "(*_env)->ReleaseByteArrayElements(_env, " + arr_name + ", (int8_t*)" + arr_name + "_ref." + ty_info.arr_access + ", 0);"
244 arr_access = "." + ty_info.arr_access
245 ret_conv = (ty_info.rust_obj + " " + arr_name + "_var = ", "")
246 ret_conv = (ret_conv[0], ";\njbyteArray " + arr_name + "_arr = (*_env)->NewByteArray(_env, " + arr_name + "_var." + arr_len + ");\n")
247 ret_conv = (ret_conv[0], ret_conv[1] + "(*_env)->SetByteArrayRegion(_env, " + arr_name + "_arr, 0, " + arr_name + "_var." + arr_len + ", " + arr_name + "_var." + ty_info.arr_access + ");")
248 elif ty_info.rust_obj is not None:
249 arg_conv = ty_info.rust_obj + " " + arr_name + "_ref;\n"
250 arg_conv = arg_conv + "CHECK((*_env)->GetArrayLength (_env, " + arr_name + ") == " + arr_len + ");\n"
251 arg_conv = arg_conv + "(*_env)->GetByteArrayRegion (_env, " + arr_name + ", 0, " + arr_len + ", " + arr_name + "_ref." + ty_info.arr_access + ");"
252 ret_conv = (ret_conv[0], "." + ty_info.arr_access + ");")
254 arg_conv = "unsigned char " + arr_name + "_arr[" + arr_len + "];\n"
255 arg_conv = arg_conv + "CHECK((*_env)->GetArrayLength (_env, " + arr_name + ") == " + arr_len + ");\n"
256 arg_conv = arg_conv + "(*_env)->GetByteArrayRegion (_env, " + arr_name + ", 0, " + arr_len + ", " + arr_name + "_arr);\n" + "unsigned char (*" + arr_name + "_ref)[" + arr_len + "] = &" + arr_name + "_arr;"
257 ret_conv = (ret_conv[0] + "*", ");")
258 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
259 arg_conv = arg_conv, arg_conv_name = arr_name + "_ref", arg_conv_cleanup = arg_conv_cleanup,
260 ret_conv = ret_conv, ret_conv_name = arr_name + "_arr")
261 elif ty_info.var_name != "":
262 # If we have a parameter name, print it (noting that it may indicate its a pointer)
263 if ty_info.rust_obj is not None:
264 assert(ty_info.passed_as_ptr)
265 opaque_arg_conv = ty_info.rust_obj + " " + ty_info.var_name + "_conv;\n"
266 opaque_arg_conv = opaque_arg_conv + ty_info.var_name + "_conv.inner = (void*)(" + ty_info.var_name + " & (~1));\n"
267 opaque_arg_conv = opaque_arg_conv + ty_info.var_name + "_conv.is_owned = (" + ty_info.var_name + " & 1) || (" + ty_info.var_name + " == 0);"
268 if not ty_info.is_ptr and not is_free:
269 if (ty_info.rust_obj.replace("LDK", "") + "_clone") in clone_fns:
270 # TODO: This is a bit too naive, even with the checks above, we really need to know if rust wants a ref or not, not just if its pass as a ptr.
271 opaque_arg_conv = opaque_arg_conv + "\nif (" + ty_info.var_name + "_conv.inner != NULL)\n"
272 opaque_arg_conv = opaque_arg_conv + "\t" + ty_info.var_name + "_conv = " + ty_info.rust_obj.replace("LDK", "") + "_clone(&" + ty_info.var_name + "_conv);"
273 elif ty_info.passed_as_ptr:
274 opaque_arg_conv = opaque_arg_conv + "\n// Warning: we may need a move here but can't clone!"
275 if not ty_info.is_ptr:
276 if ty_info.rust_obj in unitary_enums:
277 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
278 arg_conv = ty_info.rust_obj + " " + ty_info.var_name + "_conv = " + ty_info.rust_obj + "_from_java(_env, " + ty_info.var_name + ");",
279 arg_conv_name = ty_info.var_name + "_conv",
280 arg_conv_cleanup = None,
281 ret_conv = ("jclass " + ty_info.var_name + "_conv = " + ty_info.rust_obj + "_to_java(_env, ", ");"),
282 ret_conv_name = ty_info.var_name + "_conv")
283 if ty_info.rust_obj in opaque_structs:
284 ret_conv_suf = ";\nCHECK((((long)" + ty_info.var_name + "_var.inner) & 1) == 0); // We rely on a free low bit, malloc guarantees this.\n"
285 ret_conv_suf = ret_conv_suf + "CHECK((((long)&" + ty_info.var_name + "_var) & 1) == 0); // We rely on a free low bit, pointer alignment guarantees this.\n"
286 ret_conv_suf = ret_conv_suf + "long " + ty_info.var_name + "_ref;\n"
287 ret_conv_suf = ret_conv_suf + "if (" + ty_info.var_name + "_var.is_owned) {\n"
288 ret_conv_suf = ret_conv_suf + "\t" + ty_info.var_name + "_ref = (long)" + ty_info.var_name + "_var.inner | 1;\n"
289 ret_conv_suf = ret_conv_suf + "} else {\n"
290 ret_conv_suf = ret_conv_suf + "\t" + ty_info.var_name + "_ref = (long)&" + ty_info.var_name + "_var;\n"
291 ret_conv_suf = ret_conv_suf + "}"
292 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
293 arg_conv = opaque_arg_conv, arg_conv_name = ty_info.var_name + "_conv", arg_conv_cleanup = None,
294 ret_conv = (ty_info.rust_obj + " " + ty_info.var_name + "_var = ", ret_conv_suf),
295 ret_conv_name = ty_info.var_name + "_ref")
296 base_conv = ty_info.rust_obj + " " + ty_info.var_name + "_conv = *(" + ty_info.rust_obj + "*)" + ty_info.var_name + ";";
297 if ty_info.rust_obj in trait_structs:
299 base_conv = base_conv + "\nif (" + ty_info.var_name + "_conv.free == " + ty_info.rust_obj + "_JCalls_free) {\n"
300 base_conv = base_conv + "\t// If this_arg is a JCalls struct, then we need to increment the refcnt in it.\n"
301 base_conv = base_conv + "\t" + ty_info.rust_obj + "_JCalls_clone(" + ty_info.var_name + "_conv.this_arg);\n}"
303 base_conv = base_conv + "\n" + "FREE((void*)" + ty_info.var_name + ");"
304 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
305 arg_conv = base_conv, arg_conv_name = ty_info.var_name + "_conv", arg_conv_cleanup = None,
306 ret_conv = ("CANT PASS TRAIT TO Java?", ""), ret_conv_name = "NO CONV POSSIBLE")
307 if ty_info.rust_obj != "LDKu8slice":
308 # Don't bother free'ing slices passed in - Rust doesn't auto-free the
309 # underlying unlike Vecs, and it gives Java more freedom.
310 base_conv = base_conv + "\nFREE((void*)" + ty_info.var_name + ");";
311 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
312 arg_conv = base_conv, arg_conv_name = ty_info.var_name + "_conv", arg_conv_cleanup = None,
313 ret_conv = ("long " + ty_info.var_name + "_ref = (long)&", ";"), ret_conv_name = ty_info.var_name + "_ref")
316 if ty_info.rust_obj in opaque_structs:
317 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
318 arg_conv = opaque_arg_conv, arg_conv_name = "&" + ty_info.var_name + "_conv", arg_conv_cleanup = None,
319 ret_conv = None, ret_conv_name = None) # its a pointer, no conv needed
320 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
321 arg_conv = ty_info.rust_obj + "* " + ty_info.var_name + "_conv = (" + ty_info.rust_obj + "*)" + ty_info.var_name + ";",
322 arg_conv_name = ty_info.var_name + "_conv", arg_conv_cleanup = None,
323 ret_conv = None, ret_conv_name = None) # its a pointer, no conv needed
325 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
326 arg_conv = None, arg_conv_name = ty_info.var_name, arg_conv_cleanup = None, ret_conv = None, ret_conv_name = None)
327 elif ty_info.java_ty == "String":
328 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
329 arg_conv = None, arg_conv_name = None, arg_conv_cleanup = None,
330 ret_conv = ("jstring " + ty_info.var_name + "_conv = (*_env)->NewStringUTF(_env, ", ");"), ret_conv_name = ty_info.var_name + "_conv")
332 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
333 arg_conv = None, arg_conv_name = ty_info.var_name, arg_conv_cleanup = None, ret_conv = None, ret_conv_name = None)
335 # We don't have a parameter name, and want one, just call it arg
336 if ty_info.rust_obj is not None:
337 assert(not is_free or ty_info.rust_obj not in opaque_structs);
338 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
339 arg_conv = ty_info.rust_obj + " arg_conv = *(" + ty_info.rust_obj + "*)arg;\nFREE((void*)arg);",
340 arg_conv_name = "arg_conv", arg_conv_cleanup = None,
341 ret_conv = None, ret_conv_name = None)
344 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
345 arg_conv = None, arg_conv_name = "arg", arg_conv_cleanup = None, ret_conv = None, ret_conv_name = None)
347 # We don't have a parameter name, and don't want one (cause we're returning)
348 if ty_info.rust_obj is not None:
349 if not ty_info.is_ptr:
350 if ty_info.rust_obj in unitary_enums:
351 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
352 arg_conv = ty_info.rust_obj + " ret = " + ty_info.rust_obj + "_from_java(_env, " + ty_info.var_name + ");",
353 arg_conv_name = "ret", arg_conv_cleanup = None,
354 ret_conv = ("jclass ret = " + ty_info.rust_obj + "_to_java(_env, ", ");"), ret_conv_name = "ret")
355 if ty_info.rust_obj in opaque_structs:
356 # If we're returning a newly-allocated struct, we don't want Rust to ever
357 # free, instead relying on the Java GC to lose the ref. We undo this in
358 # any _free function.
359 # To avoid any issues, we first assert that the incoming object is non-ref.
360 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
361 ret_conv = (ty_info.rust_obj + " ret = ", ";"),
362 ret_conv_name = "((long)ret.inner) | (ret.is_owned ? 1 : 0)",
363 arg_conv = None, arg_conv_name = None, arg_conv_cleanup = None)
365 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
366 ret_conv = (ty_info.rust_obj + "* ret = MALLOC(sizeof(" + ty_info.rust_obj + "), \"" + ty_info.rust_obj + "\");\n*ret = ", ";"),
367 ret_conv_name = "(long)ret",
368 arg_conv = None, arg_conv_name = None, arg_conv_cleanup = None)
370 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
371 ret_conv = ("long ret = (long)", ";"), ret_conv_name = "ret",
372 arg_conv = None, arg_conv_name = None, arg_conv_cleanup = None)
374 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
375 arg_conv = None, arg_conv_name = None, arg_conv_cleanup = None, ret_conv = None, ret_conv_name = None)
377 def map_fn(line, re_match, ret_arr_len, c_call_string):
378 out_java.write("\t// " + line)
379 out_java.write("\tpublic static native ")
380 out_c.write("JNIEXPORT ")
382 is_free = re_match.group(2).endswith("_free")
383 struct_meth = re_match.group(2).split("_")[0]
385 ret_info = map_type(re_match.group(1), True, ret_arr_len, False)
388 if ret_info.ret_conv is not None:
389 ret_conv_pfx, ret_conv_sfx = ret_info.ret_conv
391 out_java.write(" " + re_match.group(2) + "(")
392 out_c.write(" JNICALL Java_org_ldk_impl_bindings_" + re_match.group(2).replace('_', '_1') + "(JNIEnv * _env, jclass _b")
396 args_known = not ret_info.passed_as_ptr or ret_info.rust_obj in opaque_structs or ret_info.rust_obj in trait_structs
397 for idx, arg in enumerate(re_match.group(3).split(',')):
402 arg_conv_info = map_type(arg, False, None, is_free)
403 if arg_conv_info.c_ty != "void":
404 arg_conv_info.print_ty()
405 arg_conv_info.print_name()
406 if arg_conv_info.arg_name == "this_arg":
408 if arg_conv_info.passed_as_ptr and not arg_conv_info.rust_obj in opaque_structs:
409 if not arg_conv_info.rust_obj in trait_structs and not arg_conv_info.rust_obj in unitary_enums:
410 print(re_match.group(2) + " bad - " + arg_conv_info.rust_obj)
412 arg_names.append(arg_conv_info)
414 out_java_struct = None
415 if ("LDK" + struct_meth in opaque_structs or "LDK" + struct_meth in trait_structs) and not is_free:
416 out_java_struct = open(sys.argv[3] + "/structs/" + struct_meth + ".java", "a")
418 out_java_struct.write("\t// Skipped " + re_match.group(2) + "\n")
419 out_java_struct.close()
420 out_java_struct = None
422 out_java_struct.write("\tpublic ")
423 meth_n = re_match.group(2)[len(struct_meth) + 1:]
424 if ret_info.rust_obj == "LDK" + struct_meth:
425 out_java_struct.write(struct_meth + "(")
426 elif ret_info.rust_obj in opaque_structs or ret_info.rust_obj in trait_structs:
427 out_java_struct.write(ret_info.rust_obj.replace("LDK", "") + " " + meth_n + "(")
429 out_java_struct.write(ret_info.java_ty + " " + meth_n + "(")
430 for idx, arg in enumerate(arg_names):
432 if not takes_self or idx > 1:
433 out_java_struct.write(", ")
434 if arg.java_ty != "void" and arg.arg_name != "this_arg":
435 if arg.passed_as_ptr:
436 if arg.rust_obj in opaque_structs or arg.rust_obj in trait_structs:
437 out_java_struct.write(arg.rust_obj.replace("LDK", "") + " " + arg.arg_name)
439 out_java_struct.write(arg.rust_obj + " " + arg.arg_name)
441 out_java_struct.write(arg.java_ty + " " + arg.arg_name)
444 out_java.write(");\n")
446 if out_java_struct is not None:
447 out_java_struct.write(") {\n")
449 for info in arg_names:
450 if info.arg_conv is not None:
451 out_c.write("\t" + info.arg_conv.replace('\n', "\n\t") + "\n")
453 if ret_info.ret_conv is not None:
454 out_c.write("\t" + ret_conv_pfx.replace('\n', '\n\t'))
455 elif ret_info.c_ty != "void":
456 out_c.write("\t" + ret_info.c_ty + " ret_val = ")
460 if c_call_string is None:
461 out_c.write(re_match.group(2) + "(")
463 out_c.write(c_call_string)
464 for idx, info in enumerate(arg_names):
465 if info.arg_conv_name is not None:
468 elif c_call_string is not None:
470 out_c.write(info.arg_conv_name)
472 if ret_info.ret_conv is not None:
473 out_c.write(ret_conv_sfx.replace('\n', '\n\t'))
476 for info in arg_names:
477 if info.arg_conv_cleanup is not None:
478 out_c.write("\n\t" + info.arg_conv_cleanup.replace("\n", "\n\t"))
479 if ret_info.ret_conv is not None:
480 out_c.write("\n\treturn " + ret_info.ret_conv_name + ";")
481 elif ret_info.c_ty != "void":
482 out_c.write("\n\treturn ret_val;")
483 out_c.write("\n}\n\n")
484 if out_java_struct is not None:
485 out_java_struct.write("\t\t")
486 if ret_info.rust_obj == "LDK" + struct_meth:
487 out_java_struct.write("super(")
488 elif ret_info.java_ty != "void" and not ret_info.passed_as_ptr:
489 out_java_struct.write(ret_info.java_ty + " ret = ")
490 elif ret_info.java_ty != "void":
491 out_java_struct.write(ret_info.rust_obj.replace("LDK", "") + " ret = ")
492 if ret_info.rust_obj in opaque_structs or ret_info.rust_obj in trait_structs:
493 out_java_struct.write("new " + ret_info.rust_obj.replace("LDK", "") + "(null, ")
494 out_java_struct.write("bindings." + re_match.group(2) + "(")
495 for idx, info in enumerate(arg_names):
497 out_java_struct.write(", ")
498 if info.arg_name == "this_arg":
499 out_java_struct.write("this.ptr")
500 elif info.passed_as_ptr and info.rust_obj in opaque_structs:
501 out_java_struct.write(info.arg_name + " == null ? 0 : " + info.arg_name + ".ptr & ~1")
502 elif info.passed_as_ptr and info.rust_obj in trait_structs:
503 out_java_struct.write(info.arg_name + " == null ? 0 : " + info.arg_name + ".ptr")
505 out_java_struct.write(info.arg_name)
506 out_java_struct.write(")")
507 if ret_info.rust_obj == "LDK" + struct_meth:
508 out_java_struct.write(");\n")
509 elif ret_info.rust_obj in opaque_structs:
510 out_java_struct.write(");\n")
511 elif ret_info.rust_obj in trait_structs:
512 out_java_struct.write(");\n\t\tret.ptrs_to.add(this);\n")
514 out_java_struct.write(";\n")
516 for info in arg_names:
517 if info.arg_name == "this_arg":
519 elif info.passed_as_ptr and (info.rust_obj in opaque_structs or info.rust_obj in trait_structs):
520 out_java_struct.write("\t\tthis.ptrs_to.add(" + info.arg_name + ");\n")
522 if ret_info.java_ty != "void" and ret_info.rust_obj != "LDK" + struct_meth:
523 out_java_struct.write("\t\treturn ret;\n")
524 out_java_struct.write("\t}\n\n")
525 out_java_struct.close()
527 def map_unitary_enum(struct_name, field_lines):
528 with open(sys.argv[3] + "/enums/" + struct_name + ".java", "w") as out_java_enum:
529 out_java_enum.write("package org.ldk.enums;\n\n")
530 unitary_enums.add(struct_name)
531 out_c.write("static inline " + struct_name + " " + struct_name + "_from_java(JNIEnv *env, jclass val) {\n")
532 out_c.write("\tswitch ((*env)->CallIntMethod(env, val, ordinal_meth)) {\n")
534 for idx, struct_line in enumerate(field_lines):
536 out_java_enum.write("public enum " + struct_name + " {\n")
537 elif idx == len(field_lines) - 3:
538 assert(struct_line.endswith("_Sentinel,"))
539 elif idx == len(field_lines) - 2:
540 out_java_enum.write("\t; static native void init();\n")
541 out_java_enum.write("\tstatic { init(); }\n")
542 out_java_enum.write("}")
543 out_java.write("\tstatic { " + struct_name + ".values(); /* Force enum statics to run */ }\n")
544 elif idx == len(field_lines) - 1:
545 assert(struct_line == "")
547 out_java_enum.write(struct_line + "\n")
548 out_c.write("\t\tcase %d: return %s;\n" % (ord_v, struct_line.strip().strip(",")))
551 out_c.write("\tabort();\n")
555 out_c.write("static jclass " + struct_name + "_class = NULL;\n")
556 for idx, struct_line in enumerate(field_lines):
557 if idx > 0 and idx < len(field_lines) - 3:
558 variant = struct_line.strip().strip(",")
559 out_c.write("static jfieldID " + struct_name + "_" + variant + " = NULL;\n")
560 out_c.write("JNIEXPORT void JNICALL Java_org_ldk_enums_" + struct_name.replace("_", "_1") + "_init (JNIEnv * env, jclass clz) {\n")
561 out_c.write("\t" + struct_name + "_class = (*env)->NewGlobalRef(env, clz);\n")
562 out_c.write("\tCHECK(" + struct_name + "_class != NULL);\n")
563 for idx, struct_line in enumerate(field_lines):
564 if idx > 0 and idx < len(field_lines) - 3:
565 variant = struct_line.strip().strip(",")
566 out_c.write("\t" + struct_name + "_" + variant + " = (*env)->GetStaticFieldID(env, " + struct_name + "_class, \"" + variant + "\", \"Lorg/ldk/enums/" + struct_name + ";\");\n")
567 out_c.write("\tCHECK(" + struct_name + "_" + variant + " != NULL);\n")
569 out_c.write("static inline jclass " + struct_name + "_to_java(JNIEnv *env, " + struct_name + " val) {\n")
570 out_c.write("\tswitch (val) {\n")
571 for idx, struct_line in enumerate(field_lines):
572 if idx > 0 and idx < len(field_lines) - 3:
573 variant = struct_line.strip().strip(",")
574 out_c.write("\t\tcase " + variant + ":\n")
575 out_c.write("\t\t\treturn (*env)->GetStaticObjectField(env, " + struct_name + "_class, " + struct_name + "_" + variant + ");\n")
577 out_c.write("\t\tdefault: abort();\n")
581 def map_complex_enum(struct_name, union_enum_items):
582 tag_field_lines = union_enum_items["field_lines"]
583 init_meth_jty_strs = {}
584 for idx, struct_line in enumerate(tag_field_lines):
586 out_java.write("\tpublic static class " + struct_name + " {\n")
587 out_java.write("\t\tprivate " + struct_name + "() {}\n")
588 elif idx == len(tag_field_lines) - 3:
589 assert(struct_line.endswith("_Sentinel,"))
590 elif idx == len(tag_field_lines) - 2:
591 out_java.write("\t\tstatic native void init();\n")
592 out_java.write("\t}\n")
593 elif idx == len(tag_field_lines) - 1:
594 assert(struct_line == "")
596 var_name = struct_line.strip(' ,')[len(struct_name) + 1:]
597 out_java.write("\t\tpublic final static class " + var_name + " extends " + struct_name + " {\n")
598 out_c.write("static jclass " + struct_name + "_" + var_name + "_class = NULL;\n")
599 out_c.write("static jmethodID " + struct_name + "_" + var_name + "_meth = NULL;\n")
600 init_meth_jty_str = ""
601 init_meth_params = ""
603 if "LDK" + var_name in union_enum_items:
604 enum_var_lines = union_enum_items["LDK" + var_name]
605 for idx, field in enumerate(enum_var_lines):
606 if idx != 0 and idx < len(enum_var_lines) - 2:
607 field_ty = java_c_types(field.strip(' ;'), None)
608 out_java.write("\t\t\tpublic " + field_ty.java_ty + " " + field_ty.var_name + ";\n")
609 init_meth_jty_str = init_meth_jty_str + field_ty.java_fn_ty_arg
611 init_meth_params = init_meth_params + ", "
612 init_meth_params = init_meth_params + field_ty.java_ty + " " + field_ty.var_name
613 init_meth_body = init_meth_body + "this." + field_ty.var_name + " = " + field_ty.var_name + "; "
614 out_java.write("\t\t\t" + var_name + "(" + init_meth_params + ") { ")
615 out_java.write(init_meth_body)
616 out_java.write("}\n")
617 out_java.write("\t\t}\n")
618 init_meth_jty_strs[var_name] = init_meth_jty_str
619 out_java.write("\tstatic { " + struct_name + ".init(); }\n")
620 out_java.write("\tpublic static native " + struct_name + " " + struct_name + "_ref_from_ptr(long ptr);\n");
622 out_c.write("JNIEXPORT void JNICALL Java_org_ldk_impl_bindings_00024" + struct_name.replace("_", "_1") + "_init (JNIEnv * env, jclass _a) {\n")
623 for idx, struct_line in enumerate(tag_field_lines):
624 if idx != 0 and idx < len(tag_field_lines) - 3:
625 var_name = struct_line.strip(' ,')[len(struct_name) + 1:]
626 out_c.write("\t" + struct_name + "_" + var_name + "_class =\n")
627 out_c.write("\t\t(*env)->NewGlobalRef(env, (*env)->FindClass(env, \"Lorg/ldk/impl/bindings$" + struct_name + "$" + var_name + ";\"));\n")
628 out_c.write("\tCHECK(" + struct_name + "_" + var_name + "_class != NULL);\n")
629 out_c.write("\t" + struct_name + "_" + var_name + "_meth = (*env)->GetMethodID(env, " + struct_name + "_" + var_name + "_class, \"<init>\", \"(" + init_meth_jty_strs[var_name] + ")V\");\n")
630 out_c.write("\tCHECK(" + struct_name + "_" + var_name + "_meth != NULL);\n")
632 out_c.write("JNIEXPORT jobject JNICALL Java_org_ldk_impl_bindings_" + struct_name.replace("_", "_1") + "_1ref_1from_1ptr (JNIEnv * env, jclass _c, jlong ptr) {\n")
633 out_c.write("\t" + struct_name + " *obj = (" + struct_name + "*)ptr;\n")
634 out_c.write("\tswitch(obj->tag) {\n")
635 for idx, struct_line in enumerate(tag_field_lines):
636 if idx != 0 and idx < len(tag_field_lines) - 3:
637 var_name = struct_line.strip(' ,')[len(struct_name) + 1:]
638 out_c.write("\t\tcase " + struct_name + "_" + var_name + ": {\n")
640 if "LDK" + var_name in union_enum_items:
641 enum_var_lines = union_enum_items["LDK" + var_name]
642 for idx, field in enumerate(enum_var_lines):
643 if idx != 0 and idx < len(enum_var_lines) - 2:
644 field_map = map_type(field.strip(' ;'), False, None, False)
645 if field_map.ret_conv is not None:
646 out_c.write("\t\t\t" + field_map.ret_conv[0].replace("\n", "\n\t\t\t").replace("_env", "env"))
647 out_c.write("obj->" + camel_to_snake(var_name) + "." + field_map.arg_name)
648 out_c.write(field_map.ret_conv[1].replace("\n", "\n\t\t\t") + "\n")
649 c_params_text = c_params_text + ", " + field_map.ret_conv_name
651 c_params_text = c_params_text + ", obj->" + camel_to_snake(var_name) + "." + field_map.arg_name
652 out_c.write("\t\t\treturn (*env)->NewObject(env, " + struct_name + "_" + var_name + "_class, " + struct_name + "_" + var_name + "_meth" + c_params_text + ");\n")
653 out_c.write("\t\t}\n")
654 out_c.write("\t\tdefault: abort();\n")
655 out_c.write("\t}\n}\n")
657 def map_trait(struct_name, field_var_lines, trait_fn_lines):
658 with open(sys.argv[3] + "/structs/" + struct_name.replace("LDK","") + ".java", "w") as out_java_trait:
659 out_c.write("typedef struct " + struct_name + "_JCalls {\n")
660 out_c.write("\tatomic_size_t refcnt;\n")
661 out_c.write("\tJavaVM *vm;\n")
662 out_c.write("\tjweak o;\n")
663 for var_line in field_var_lines:
664 if var_line.group(1) in trait_structs:
665 out_c.write("\t" + var_line.group(1) + "_JCalls* " + var_line.group(2) + ";\n")
666 for fn_line in trait_fn_lines:
667 if fn_line.group(2) != "free" and fn_line.group(2) != "clone":
668 out_c.write("\tjmethodID " + fn_line.group(2) + "_meth;\n")
669 out_c.write("} " + struct_name + "_JCalls;\n")
671 out_java_trait.write("package org.ldk.structs;\n\n")
672 out_java_trait.write("import org.ldk.impl.bindings;\n\n")
673 out_java_trait.write("import org.ldk.enums.*;\n\n")
674 out_java_trait.write("public class " + struct_name.replace("LDK","") + " extends CommonBase {\n")
675 out_java_trait.write("\t" + struct_name.replace("LDK", "") + "(Object _dummy, long ptr) { super(ptr); }\n")
676 out_java_trait.write("\tpublic " + struct_name.replace("LDK", "") + "(bindings." + struct_name + " arg")
677 for var_line in field_var_lines:
678 if var_line.group(1) in trait_structs:
679 out_java_trait.write(", bindings." + var_line.group(1) + " " + var_line.group(2))
680 out_java_trait.write(") {\n")
681 out_java_trait.write("\t\tsuper(bindings." + struct_name + "_new(arg")
682 for var_line in field_var_lines:
683 if var_line.group(1) in trait_structs:
684 out_java_trait.write(", " + var_line.group(2))
685 out_java_trait.write("));\n")
686 out_java_trait.write("\t\tthis.ptrs_to.add(arg);\n")
687 out_java_trait.write("\t}\n")
688 out_java_trait.write("\t@Override @SuppressWarnings(\"deprecation\")\n")
689 out_java_trait.write("\tprotected void finalize() throws Throwable {\n")
690 out_java_trait.write("\t\tbindings." + struct_name.replace("LDK","") + "_free(ptr); super.finalize();\n")
691 out_java_trait.write("\t}\n\n")
693 out_java.write("\tpublic interface " + struct_name + " {\n")
695 for fn_line in trait_fn_lines:
696 java_meth_descr = "("
697 if fn_line.group(2) != "free" and fn_line.group(2) != "clone":
698 ret_ty_info = java_c_types(fn_line.group(1), None)
700 out_java.write("\t\t " + ret_ty_info.java_ty + " " + fn_line.group(2) + "(")
701 is_const = fn_line.group(3) is not None
702 out_c.write(fn_line.group(1) + fn_line.group(2) + "_jcall(")
704 out_c.write("const void* this_arg")
706 out_c.write("void* this_arg")
709 for idx, arg in enumerate(fn_line.group(4).split(',')):
715 arg_conv_info = map_type(arg, True, None, False)
716 out_c.write(arg.strip())
717 out_java.write(arg_conv_info.java_ty + " " + arg_conv_info.arg_name)
718 arg_names.append(arg_conv_info)
719 java_meth_descr = java_meth_descr + arg_conv_info.java_fn_ty_arg
720 java_meth_descr = java_meth_descr + ")" + ret_ty_info.java_fn_ty_arg
721 java_meths.append(java_meth_descr)
723 out_java.write(");\n")
725 out_c.write("\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n")
726 out_c.write("\tJNIEnv *env;\n")
727 out_c.write("\tDO_ASSERT((*j_calls->vm)->GetEnv(j_calls->vm, (void**)&env, JNI_VERSION_1_8) == JNI_OK);\n")
729 for arg_info in arg_names:
730 if arg_info.ret_conv is not None:
731 out_c.write("\t" + arg_info.ret_conv[0].replace('\n', '\n\t').replace("_env", "env"));
732 out_c.write(arg_info.arg_name)
733 out_c.write(arg_info.ret_conv[1].replace('\n', '\n\t').replace("_env", "env") + "\n")
735 out_c.write("\tjobject obj = (*env)->NewLocalRef(env, j_calls->o);\n\tCHECK(obj != NULL);\n")
736 if ret_ty_info.c_ty.endswith("Array"):
737 assert(ret_ty_info.c_ty == "jbyteArray")
738 out_c.write("\tjbyteArray jret = (*env)->CallObjectMethod(env, obj, j_calls->" + fn_line.group(2) + "_meth")
739 elif not ret_ty_info.passed_as_ptr:
740 out_c.write("\treturn (*env)->Call" + ret_ty_info.java_ty.title() + "Method(env, obj, j_calls->" + fn_line.group(2) + "_meth")
742 out_c.write("\t" + fn_line.group(1).strip() + "* ret = (" + fn_line.group(1).strip() + "*)(*env)->CallLongMethod(env, obj, j_calls->" + fn_line.group(2) + "_meth");
744 for arg_info in arg_names:
745 if arg_info.ret_conv is not None:
746 out_c.write(", " + arg_info.ret_conv_name)
748 out_c.write(", " + arg_info.arg_name)
750 if ret_ty_info.c_ty.endswith("Array"):
751 out_c.write("\t" + ret_ty_info.rust_obj + " ret;\n")
752 out_c.write("\tCHECK((*env)->GetArrayLength(env, jret) == " + ret_ty_info.arr_len + ");\n")
753 out_c.write("\t(*env)->GetByteArrayRegion(env, jret, 0, " + ret_ty_info.arr_len + ", ret." + ret_ty_info.arr_access + ");\n")
754 out_c.write("\treturn ret;\n")
756 if ret_ty_info.passed_as_ptr:
757 out_c.write("\t" + fn_line.group(1).strip() + " res = *ret;\n")
758 out_c.write("\tFREE(ret);\n")
759 out_c.write("\treturn res;\n")
761 elif fn_line.group(2) == "free":
762 out_c.write("static void " + struct_name + "_JCalls_free(void* this_arg) {\n")
763 out_c.write("\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n")
764 out_c.write("\tif (atomic_fetch_sub_explicit(&j_calls->refcnt, 1, memory_order_acquire) == 1) {\n")
765 out_c.write("\t\tJNIEnv *env;\n")
766 out_c.write("\t\tDO_ASSERT((*j_calls->vm)->GetEnv(j_calls->vm, (void**)&env, JNI_VERSION_1_8) == JNI_OK);\n")
767 out_c.write("\t\t(*env)->DeleteWeakGlobalRef(env, j_calls->o);\n")
768 out_c.write("\t\tFREE(j_calls);\n")
769 out_c.write("\t}\n}\n")
771 # Write out a clone function whether we need one or not, as we use them in moving to rust
772 out_c.write("static void* " + struct_name + "_JCalls_clone(const void* this_arg) {\n")
773 out_c.write("\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n")
774 out_c.write("\tatomic_fetch_add_explicit(&j_calls->refcnt, 1, memory_order_release);\n")
775 for var_line in field_var_lines:
776 if var_line.group(1) in trait_structs:
777 out_c.write("\tatomic_fetch_add_explicit(&j_calls->" + var_line.group(2) + "->refcnt, 1, memory_order_release);\n")
778 out_c.write("\treturn (void*) this_arg;\n")
781 out_java.write("\t}\n")
783 out_java.write("\tpublic static native long " + struct_name + "_new(" + struct_name + " impl")
784 out_c.write("static inline " + struct_name + " " + struct_name + "_init (JNIEnv * env, jclass _a, jobject o")
785 for var_line in field_var_lines:
786 if var_line.group(1) in trait_structs:
787 out_java.write(", " + var_line.group(1) + " " + var_line.group(2))
788 out_c.write(", jobject " + var_line.group(2))
789 out_java.write(");\n")
792 out_c.write("\tjclass c = (*env)->GetObjectClass(env, o);\n")
793 out_c.write("\tCHECK(c != NULL);\n")
794 out_c.write("\t" + struct_name + "_JCalls *calls = MALLOC(sizeof(" + struct_name + "_JCalls), \"" + struct_name + "_JCalls\");\n")
795 out_c.write("\tatomic_init(&calls->refcnt, 1);\n")
796 out_c.write("\tDO_ASSERT((*env)->GetJavaVM(env, &calls->vm) == 0);\n")
797 out_c.write("\tcalls->o = (*env)->NewWeakGlobalRef(env, o);\n")
798 for (fn_line, java_meth_descr) in zip(trait_fn_lines, java_meths):
799 if fn_line.group(2) != "free" and fn_line.group(2) != "clone":
800 out_c.write("\tcalls->" + fn_line.group(2) + "_meth = (*env)->GetMethodID(env, c, \"" + fn_line.group(2) + "\", \"" + java_meth_descr + "\");\n")
801 out_c.write("\tCHECK(calls->" + fn_line.group(2) + "_meth != NULL);\n")
802 out_c.write("\n\t" + struct_name + " ret = {\n")
803 out_c.write("\t\t.this_arg = (void*) calls,\n")
804 for fn_line in trait_fn_lines:
805 if fn_line.group(2) != "free" and fn_line.group(2) != "clone":
806 out_c.write("\t\t." + fn_line.group(2) + " = " + fn_line.group(2) + "_jcall,\n")
807 elif fn_line.group(2) == "free":
808 out_c.write("\t\t.free = " + struct_name + "_JCalls_free,\n")
810 out_c.write("\t\t.clone = " + struct_name + "_JCalls_clone,\n")
811 for var_line in field_var_lines:
812 if var_line.group(1) in trait_structs:
813 out_c.write("\t\t." + var_line.group(2) + " = " + var_line.group(1) + "_init(env, _a, " + var_line.group(2) + "),\n")
814 out_c.write("\t};\n")
815 for var_line in field_var_lines:
816 if var_line.group(1) in trait_structs:
817 out_c.write("\tcalls->" + var_line.group(2) + " = ret." + var_line.group(2) + ".this_arg;\n")
818 out_c.write("\treturn ret;\n")
821 out_c.write("JNIEXPORT long JNICALL Java_org_ldk_impl_bindings_" + struct_name.replace("_", "_1") + "_1new (JNIEnv * env, jclass _a, jobject o")
822 for var_line in field_var_lines:
823 if var_line.group(1) in trait_structs:
824 out_c.write(", jobject " + var_line.group(2))
826 out_c.write("\t" + struct_name + " *res_ptr = MALLOC(sizeof(" + struct_name + "), \"" + struct_name + "\");\n")
827 out_c.write("\t*res_ptr = " + struct_name + "_init(env, _a, o")
828 for var_line in field_var_lines:
829 if var_line.group(1) in trait_structs:
830 out_c.write(", " + var_line.group(2))
832 out_c.write("\treturn (long)res_ptr;\n")
835 out_java.write("\tpublic static native " + struct_name + " " + struct_name + "_get_obj_from_jcalls(long val);\n")
836 out_c.write("JNIEXPORT jobject JNICALL Java_org_ldk_impl_bindings_" + struct_name.replace("_", "_1") + "_1get_1obj_1from_1jcalls (JNIEnv * env, jclass _a, jlong val) {\n")
837 out_c.write("\tjobject ret = (*env)->NewLocalRef(env, ((" + struct_name + "_JCalls*)val)->o);\n")
838 out_c.write("\tCHECK(ret != NULL);\n")
839 out_c.write("\treturn ret;\n")
842 for fn_line in trait_fn_lines:
843 # For now, just disable enabling the _call_log - we don't know how to inverse-map String
844 is_log = fn_line.group(2) == "log" and struct_name == "LDKLogger"
845 if fn_line.group(2) != "free" and fn_line.group(2) != "clone" and fn_line.group(2) != "eq" and not is_log:
846 dummy_line = fn_line.group(1) + struct_name.replace("LDK", "") + "_call_" + fn_line.group(2) + " " + struct_name + "* this_arg" + fn_line.group(4) + "\n"
847 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(2) + ")(this_arg_conv->this_arg")
849 out_c.write("""#include \"org_ldk_impl_bindings.h\"
850 #include <rust_types.h>
851 #include <lightning.h>
853 #include <stdatomic.h>
856 if sys.argv[4] == "false":
857 out_c.write("#define MALLOC(a, _) malloc(a)\n")
858 out_c.write("#define FREE free\n")
859 out_c.write("#define DO_ASSERT(a) (void)(a)\n")
860 out_c.write("#define CHECK(a)\n")
862 out_c.write("""#include <assert.h>
863 // Always run a, then assert it is true:
864 #define DO_ASSERT(a) do { bool _assert_val = (a); assert(_assert_val); } while(0)
865 // Assert a is true or do nothing
866 #define CHECK(a) DO_ASSERT(a)
868 // Running a leak check across all the allocations and frees of the JDK is a mess,
869 // so instead we implement our own naive leak checker here, relying on the -wrap
870 // linker option to wrap malloc/calloc/realloc/free, tracking everyhing allocated
871 // and free'd in Rust or C across the generated bindings shared library.
873 #include <execinfo.h>
875 static mtx_t allocation_mtx;
877 void __attribute__((constructor)) init_mtx() {
878 DO_ASSERT(mtx_init(&allocation_mtx, mtx_plain) == thrd_success);
882 typedef struct allocation {
883 struct allocation* next;
885 const char* struct_name;
889 static allocation* allocation_ll = NULL;
891 void* __real_malloc(size_t len);
892 void* __real_calloc(size_t nmemb, size_t len);
893 static void new_allocation(void* res, const char* struct_name) {
894 allocation* new_alloc = __real_malloc(sizeof(allocation));
895 new_alloc->ptr = res;
896 new_alloc->struct_name = struct_name;
897 new_alloc->bt_len = backtrace(new_alloc->bt, BT_MAX);
898 DO_ASSERT(mtx_lock(&allocation_mtx) == thrd_success);
899 new_alloc->next = allocation_ll;
900 allocation_ll = new_alloc;
901 DO_ASSERT(mtx_unlock(&allocation_mtx) == thrd_success);
903 static void* MALLOC(size_t len, const char* struct_name) {
904 void* res = __real_malloc(len);
905 new_allocation(res, struct_name);
908 void __real_free(void* ptr);
909 static void alloc_freed(void* ptr) {
910 allocation* p = NULL;
911 DO_ASSERT(mtx_lock(&allocation_mtx) == thrd_success);
912 allocation* it = allocation_ll;
913 while (it->ptr != ptr) { p = it; it = it->next; }
914 if (p) { p->next = it->next; } else { allocation_ll = it->next; }
915 DO_ASSERT(mtx_unlock(&allocation_mtx) == thrd_success);
916 DO_ASSERT(it->ptr == ptr);
919 static void FREE(void* ptr) {
924 void* __wrap_malloc(size_t len) {
925 void* res = __real_malloc(len);
926 new_allocation(res, "malloc call");
929 void* __wrap_calloc(size_t nmemb, size_t len) {
930 void* res = __real_calloc(nmemb, len);
931 new_allocation(res, "calloc call");
934 void __wrap_free(void* ptr) {
939 void* __real_realloc(void* ptr, size_t newlen);
940 void* __wrap_realloc(void* ptr, size_t len) {
942 void* res = __real_realloc(ptr, len);
943 new_allocation(res, "realloc call");
946 void __wrap_reallocarray(void* ptr, size_t new_sz) {
947 // Rust doesn't seem to use reallocarray currently
951 void __attribute__((destructor)) check_leaks() {
952 for (allocation* a = allocation_ll; a != NULL; a = a->next) {
953 fprintf(stderr, "%s %p remains:\\n", a->struct_name, a->ptr);
954 backtrace_symbols_fd(a->bt, a->bt_len, STDERR_FILENO);
955 fprintf(stderr, "\\n\\n");
957 DO_ASSERT(allocation_ll == NULL);
960 out_java.write("""package org.ldk.impl;
961 import org.ldk.enums.*;
963 public class bindings {
964 public static class VecOrSliceDef {
968 public VecOrSliceDef(long dataptr, long datalen, long stride) {
969 this.dataptr = dataptr; this.datalen = datalen; this.stride = stride;
973 System.loadLibrary(\"lightningjni\");
974 init(java.lang.Enum.class, VecOrSliceDef.class);
976 static native void init(java.lang.Class c, java.lang.Class slicedef);
978 public static native boolean deref_bool(long ptr);
979 public static native long deref_long(long ptr);
980 public static native void free_heap_ptr(long ptr);
981 public static native byte[] read_bytes(long ptr, long len);
982 public static native byte[] get_u8_slice_bytes(long slice_ptr);
983 public static native long bytes_to_u8_vec(byte[] bytes);
984 public static native long new_txpointer_copy_data(byte[] txdata);
985 public static native long vec_slice_len(long vec);
986 public static native long new_empty_slice_vec();
990 static jmethodID ordinal_meth = NULL;
991 static jmethodID slicedef_meth = NULL;
992 static jclass slicedef_cls = NULL;
993 JNIEXPORT void Java_org_ldk_impl_bindings_init(JNIEnv * env, jclass _b, jclass enum_class, jclass slicedef_class) {
994 ordinal_meth = (*env)->GetMethodID(env, enum_class, "ordinal", "()I");
995 CHECK(ordinal_meth != NULL);
996 slicedef_meth = (*env)->GetMethodID(env, slicedef_class, "<init>", "(JJJ)V");
997 CHECK(slicedef_meth != NULL);
998 slicedef_cls = (*env)->NewGlobalRef(env, slicedef_class);
999 CHECK(slicedef_cls != NULL);
1002 JNIEXPORT jboolean JNICALL Java_org_ldk_impl_bindings_deref_1bool (JNIEnv * env, jclass _a, jlong ptr) {
1003 return *((bool*)ptr);
1005 JNIEXPORT jlong JNICALL Java_org_ldk_impl_bindings_deref_1long (JNIEnv * env, jclass _a, jlong ptr) {
1006 return *((long*)ptr);
1008 JNIEXPORT void JNICALL Java_org_ldk_impl_bindings_free_1heap_1ptr (JNIEnv * env, jclass _a, jlong ptr) {
1011 JNIEXPORT jbyteArray JNICALL Java_org_ldk_impl_bindings_read_1bytes (JNIEnv * _env, jclass _b, jlong ptr, jlong len) {
1012 jbyteArray ret_arr = (*_env)->NewByteArray(_env, len);
1013 (*_env)->SetByteArrayRegion(_env, ret_arr, 0, len, (unsigned char*)ptr);
1016 JNIEXPORT jbyteArray JNICALL Java_org_ldk_impl_bindings_get_1u8_1slice_1bytes (JNIEnv * _env, jclass _b, jlong slice_ptr) {
1017 LDKu8slice *slice = (LDKu8slice*)slice_ptr;
1018 jbyteArray ret_arr = (*_env)->NewByteArray(_env, slice->datalen);
1019 (*_env)->SetByteArrayRegion(_env, ret_arr, 0, slice->datalen, slice->data);
1022 JNIEXPORT long JNICALL Java_org_ldk_impl_bindings_bytes_1to_1u8_1vec (JNIEnv * _env, jclass _b, jbyteArray bytes) {
1023 LDKCVec_u8Z *vec = (LDKCVec_u8Z*)MALLOC(sizeof(LDKCVec_u8Z), "LDKCVec_u8");
1024 vec->datalen = (*_env)->GetArrayLength(_env, bytes);
1025 vec->data = (uint8_t*)MALLOC(vec->datalen, "LDKCVec_u8Z Bytes");
1026 (*_env)->GetByteArrayRegion (_env, bytes, 0, vec->datalen, vec->data);
1029 JNIEXPORT long JNICALL Java_org_ldk_impl_bindings_new_1txpointer_1copy_1data (JNIEnv * env, jclass _b, jbyteArray bytes) {
1030 LDKTransaction *txdata = (LDKTransaction*)MALLOC(sizeof(LDKTransaction), "LDKTransaction");
1031 txdata->datalen = (*env)->GetArrayLength(env, bytes);
1032 txdata->data = (uint8_t*)MALLOC(txdata->datalen, "Tx Data Bytes");
1033 txdata->data_is_owned = true;
1034 (*env)->GetByteArrayRegion (env, bytes, 0, txdata->datalen, txdata->data);
1035 return (long)txdata;
1037 JNIEXPORT jlong JNICALL Java_org_ldk_impl_bindings_vec_1slice_1len (JNIEnv * env, jclass _a, jlong ptr) {
1038 // Check offsets of a few Vec types are all consistent as we're meant to be generic across types
1039 _Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKCVec_SignatureZ, datalen), "Vec<*> needs to be mapped identically");
1040 _Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKCVec_MessageSendEventZ, datalen), "Vec<*> needs to be mapped identically");
1041 _Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKCVec_EventZ, datalen), "Vec<*> needs to be mapped identically");
1042 _Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKCVec_C2Tuple_usizeTransactionZZ, datalen), "Vec<*> needs to be mapped identically");
1043 LDKCVec_u8Z *vec = (LDKCVec_u8Z*)ptr;
1044 return (long)vec->datalen;
1046 JNIEXPORT long JNICALL Java_org_ldk_impl_bindings_new_1empty_1slice_1vec (JNIEnv * _env, jclass _b) {
1047 // Check sizes of a few Vec types are all consistent as we're meant to be generic across types
1048 _Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKCVec_SignatureZ), "Vec<*> needs to be mapped identically");
1049 _Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKCVec_MessageSendEventZ), "Vec<*> needs to be mapped identically");
1050 _Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKCVec_EventZ), "Vec<*> needs to be mapped identically");
1051 _Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKCVec_C2Tuple_usizeTransactionZZ), "Vec<*> needs to be mapped identically");
1052 LDKCVec_u8Z *vec = (LDKCVec_u8Z*)MALLOC(sizeof(LDKCVec_u8Z), "Empty LDKCVec");
1058 // We assume that CVec_u8Z and u8slice are the same size and layout (and thus pointers to the two can be mixed)
1059 _Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKu8slice), "Vec<u8> and [u8] need to have been mapped identically");
1060 _Static_assert(offsetof(LDKCVec_u8Z, data) == offsetof(LDKu8slice, data), "Vec<u8> and [u8] need to have been mapped identically");
1061 _Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKu8slice, datalen), "Vec<u8> and [u8] need to have been mapped identically");
1065 with open(sys.argv[3] + "/structs/CommonBase.java", "a") as out_java_struct:
1066 out_java_struct.write("""package org.ldk.structs;
1067 import java.util.LinkedList;
1070 LinkedList<Object> ptrs_to = new LinkedList();
1071 protected CommonBase(long ptr) { this.ptr = ptr; }
1072 public long _test_only_get_ptr() { return this.ptr; }
1076 in_block_comment = False
1077 cur_block_obj = None
1079 const_val_regex = re.compile("^extern const ([A-Za-z_0-9]*) ([A-Za-z_0-9]*);$")
1081 line_indicates_result_regex = re.compile("^ (LDKCResultPtr_[A-Za-z_0-9]*) contents;$")
1082 line_indicates_vec_regex = re.compile("^ ([A-Za-z_0-9]*) \*data;$")
1083 line_indicates_opaque_regex = re.compile("^ bool is_owned;$")
1084 line_indicates_trait_regex = re.compile("^ ([A-Za-z_0-9]* \*?)\(\*([A-Za-z_0-9]*)\)\((const )?void \*this_arg(.*)\);$")
1085 assert(line_indicates_trait_regex.match(" uintptr_t (*send_data)(void *this_arg, LDKu8slice data, bool resume_read);"))
1086 assert(line_indicates_trait_regex.match(" LDKCVec_MessageSendEventZ (*get_and_clear_pending_msg_events)(const void *this_arg);"))
1087 assert(line_indicates_trait_regex.match(" void *(*clone)(const void *this_arg);"))
1088 line_field_var_regex = re.compile("^ ([A-Za-z_0-9]*) ([A-Za-z_0-9]*);$")
1089 assert(line_field_var_regex.match(" LDKMessageSendEventsProvider MessageSendEventsProvider;"))
1090 struct_name_regex = re.compile("^typedef (struct|enum|union) (MUST_USE_STRUCT )?(LDK[A-Za-z_0-9]*) {$")
1091 assert(struct_name_regex.match("typedef struct LDKCVecTempl_u8 {"))
1092 assert(struct_name_regex.match("typedef enum LDKNetwork {"))
1093 struct_alias_regex = re.compile("^typedef (LDK[A-Za-z_0-9]*) (LDK[A-Za-z_0-9]*);$")
1094 assert(struct_alias_regex.match("typedef LDKCResultTempl_bool__PeerHandleError LDKCResult_boolPeerHandleErrorZ;"))
1096 result_templ_structs = set()
1097 union_enum_items = {}
1098 result_ptr_struct_items = {}
1100 if in_block_comment:
1101 if line.endswith("*/\n"):
1102 in_block_comment = False
1103 elif cur_block_obj is not None:
1104 cur_block_obj = cur_block_obj + line
1105 if line.startswith("} "):
1109 obj_lines = cur_block_obj.split("\n")
1111 result_contents = None
1112 is_unitary_enum = False
1113 is_union_enum = False
1117 field_var_lines = []
1119 for idx, struct_line in enumerate(obj_lines):
1120 if struct_line.strip().startswith("/*"):
1121 in_block_comment = True
1122 if in_block_comment:
1123 if struct_line.endswith("*/"):
1124 in_block_comment = False
1126 struct_name_match = struct_name_regex.match(struct_line)
1127 if struct_name_match is not None:
1128 struct_name = struct_name_match.group(3)
1129 if struct_name_match.group(1) == "enum":
1130 if not struct_name.endswith("_Tag"):
1131 is_unitary_enum = True
1133 is_union_enum = True
1134 elif struct_name_match.group(1) == "union":
1136 if line_indicates_opaque_regex.match(struct_line):
1138 result_match = line_indicates_result_regex.match(struct_line)
1139 if result_match is not None:
1140 result_contents = result_match.group(1)
1141 vec_ty_match = line_indicates_vec_regex.match(struct_line)
1142 if vec_ty_match is not None and struct_name.startswith("LDKCVecTempl_"):
1143 vec_ty = vec_ty_match.group(1)
1144 elif struct_name.startswith("LDKC2TupleTempl_") or struct_name.startswith("LDKC3TupleTempl_"):
1146 trait_fn_match = line_indicates_trait_regex.match(struct_line)
1147 if trait_fn_match is not None:
1148 trait_fn_lines.append(trait_fn_match)
1149 field_var_match = line_field_var_regex.match(struct_line)
1150 if field_var_match is not None:
1151 field_var_lines.append(field_var_match)
1152 field_lines.append(struct_line)
1154 assert(struct_name is not None)
1155 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))
1156 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))
1157 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))
1158 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))
1159 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))
1160 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))
1161 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))
1164 opaque_structs.add(struct_name)
1165 with open(sys.argv[3] + "/structs/" + struct_name.replace("LDK","") + ".java", "w") as out_java_struct:
1166 out_java_struct.write("package org.ldk.structs;\n\n")
1167 out_java_struct.write("import org.ldk.impl.bindings;\n")
1168 out_java_struct.write("import org.ldk.enums.*;\n\n")
1169 out_java_struct.write("public class " + struct_name.replace("LDK","") + " extends CommonBase {\n")
1170 out_java_struct.write("\t" + struct_name.replace("LDK", "") + "(Object _dummy, long ptr) { super(ptr); }\n")
1171 out_java_struct.write("\t@Override @SuppressWarnings(\"deprecation\")\n")
1172 out_java_struct.write("\tprotected void finalize() throws Throwable {\n")
1173 out_java_struct.write("\t\tbindings." + struct_name.replace("LDK","") + "_free(ptr); super.finalize();\n")
1174 out_java_struct.write("\t}\n\n")
1175 elif result_contents is not None:
1176 result_templ_structs.add(struct_name)
1177 assert result_contents in result_ptr_struct_items
1178 elif struct_name.startswith("LDKCResultPtr_"):
1179 for line in field_lines:
1180 if line.endswith("*result;"):
1181 res_ty = line[:-8].strip()
1182 elif line.endswith("*err;"):
1183 err_ty = line[:-5].strip()
1184 result_ptr_struct_items[struct_name] = (res_ty, err_ty)
1186 out_java.write("\tpublic static native long " + struct_name + "_new(")
1187 out_c.write("JNIEXPORT jlong JNICALL Java_org_ldk_impl_bindings_" + struct_name.replace("_", "_1") + "_1new(JNIEnv *_env, jclass _b")
1188 for idx, line in enumerate(field_lines):
1189 if idx != 0 and idx < len(field_lines) - 2:
1190 ty_info = java_c_types(line.strip(';'), None)
1192 out_java.write(", ")
1193 e = chr(ord('a') + idx - 1)
1194 out_java.write(ty_info.java_ty + " " + e)
1195 out_c.write(", " + ty_info.c_ty + " " + e)
1196 out_java.write(");\n")
1197 out_c.write(") {\n")
1198 out_c.write("\t" + struct_name + "* ret = MALLOC(sizeof(" + struct_name + "), \"" + struct_name + "\");\n")
1199 for idx, line in enumerate(field_lines):
1200 if idx != 0 and idx < len(field_lines) - 2:
1201 ty_info = map_type(line.strip(';'), False, None, False)
1202 e = chr(ord('a') + idx - 1)
1203 if ty_info.arg_conv is not None:
1204 out_c.write("\t" + ty_info.arg_conv.replace("\n", "\n\t"))
1205 out_c.write("\n\tret->" + e + " = " + ty_info.arg_conv_name + ";\n")
1207 out_c.write("\tret->" + e + " = " + e + ";\n")
1208 assert ty_info.arg_conv_cleanup is None
1209 out_c.write("\treturn (long)ret;\n")
1211 elif vec_ty is not None:
1212 if vec_ty in opaque_structs:
1213 out_java.write("\tpublic static native long[] " + struct_name + "_arr_info(long vec_ptr);\n")
1214 out_c.write("JNIEXPORT jlongArray JNICALL Java_org_ldk_impl_bindings_" + struct_name.replace("_", "_1") + "_1arr_1info(JNIEnv *env, jclass _b, jlong ptr) {\n")
1216 out_java.write("\tpublic static native VecOrSliceDef " + struct_name + "_arr_info(long vec_ptr);\n")
1217 out_c.write("JNIEXPORT jobject JNICALL Java_org_ldk_impl_bindings_" + struct_name.replace("_", "_1") + "_1arr_1info(JNIEnv *env, jclass _b, jlong ptr) {\n")
1218 out_c.write("\t" + struct_name + " *vec = (" + struct_name + "*)ptr;\n")
1219 if vec_ty in opaque_structs:
1220 out_c.write("\tjlongArray ret = (*env)->NewLongArray(env, vec->datalen);\n")
1221 out_c.write("\tjlong *ret_elems = (*env)->GetPrimitiveArrayCritical(env, ret, NULL);\n")
1222 out_c.write("\tfor (size_t i = 0; i < vec->datalen; i++) {\n")
1223 out_c.write("\t\tCHECK((((long)vec->data[i].inner) & 1) == 0);\n")
1224 out_c.write("\t\tret_elems[i] = (long)vec->data[i].inner | (vec->data[i].is_owned ? 1 : 0);\n")
1225 out_c.write("\t}\n")
1226 out_c.write("\t(*env)->ReleasePrimitiveArrayCritical(env, ret, ret_elems, 0);\n")
1227 out_c.write("\treturn ret;\n")
1229 out_c.write("\treturn (*env)->NewObject(env, slicedef_cls, slicedef_meth, (long)vec->data, (long)vec->datalen, sizeof(" + vec_ty + "));\n")
1232 ty_info = map_type(vec_ty + " arr_elem", False, None, False)
1233 if len(ty_info.java_fn_ty_arg) == 1: # ie we're a primitive of some form
1234 out_java.write("\tpublic static native long " + struct_name + "_new(" + ty_info.java_ty + "[] elems);\n")
1235 out_c.write("JNIEXPORT jlong JNICALL Java_org_ldk_impl_bindings_" + struct_name.replace("_", "_1") + "_1new(JNIEnv *env, jclass _b, j" + ty_info.java_ty + "Array elems){\n")
1236 out_c.write("\t" + struct_name + " *ret = MALLOC(sizeof(" + struct_name + "), \"" + struct_name + "\");\n")
1237 out_c.write("\tret->datalen = (*env)->GetArrayLength(env, elems);\n")
1238 out_c.write("\tif (ret->datalen == 0) {\n")
1239 out_c.write("\t\tret->data = NULL;\n")
1240 out_c.write("\t} else {\n")
1241 out_c.write("\t\tret->data = MALLOC(sizeof(" + vec_ty + ") * ret->datalen, \"" + struct_name + " Data\");\n")
1242 out_c.write("\t\t" + ty_info.c_ty + " *java_elems = (*env)->GetPrimitiveArrayCritical(env, elems, NULL);\n")
1243 out_c.write("\t\tfor (size_t i = 0; i < ret->datalen; i++) {\n")
1244 if ty_info.arg_conv is not None:
1245 out_c.write("\t\t\t" + ty_info.c_ty + " arr_elem = java_elems[i];\n")
1246 out_c.write("\t\t\t" + ty_info.arg_conv.replace("\n", "\n\t\t\t") + "\n")
1247 out_c.write("\t\t\tret->data[i] = " + ty_info.arg_conv_name + ";\n")
1248 assert ty_info.arg_conv_cleanup is None
1250 out_c.write("\t\t\tret->data[i] = java_elems[i];\n")
1251 out_c.write("\t\t}\n")
1252 out_c.write("\t\t(*env)->ReleasePrimitiveArrayCritical(env, elems, java_elems, 0);\n")
1253 out_c.write("\t}\n")
1254 out_c.write("\treturn (long)ret;\n")
1257 assert(struct_name.endswith("_Tag"))
1258 struct_name = struct_name[:-4]
1259 union_enum_items[struct_name] = {"field_lines": field_lines}
1260 elif struct_name.endswith("_Body") and struct_name.split("_")[0] in union_enum_items:
1261 enum_var_name = struct_name.split("_")
1262 union_enum_items[enum_var_name[0]][enum_var_name[1]] = field_lines
1263 elif struct_name in union_enum_items:
1264 map_complex_enum(struct_name, union_enum_items[struct_name])
1265 elif is_unitary_enum:
1266 map_unitary_enum(struct_name, field_lines)
1267 elif len(trait_fn_lines) > 0:
1268 trait_structs.add(struct_name)
1269 map_trait(struct_name, field_var_lines, trait_fn_lines)
1270 cur_block_obj = None
1272 fn_ptr = fn_ptr_regex.match(line)
1273 fn_ret_arr = fn_ret_arr_regex.match(line)
1274 reg_fn = reg_fn_regex.match(line)
1275 const_val = const_val_regex.match(line)
1277 if line.startswith("#include <"):
1279 elif line.startswith("/*"):
1280 #out_java.write("\t" + line)
1281 if not line.endswith("*/\n"):
1282 in_block_comment = True
1283 elif line.startswith("typedef enum "):
1284 cur_block_obj = line
1285 elif line.startswith("typedef struct "):
1286 cur_block_obj = line
1287 elif line.startswith("typedef union "):
1288 cur_block_obj = line
1289 elif line.startswith("typedef "):
1290 alias_match = struct_alias_regex.match(line)
1291 if alias_match.group(1) in result_templ_structs:
1292 out_java.write("\tpublic static native boolean " + alias_match.group(2) + "_result_ok(long arg);\n")
1293 out_java.write("\tpublic static native long " + alias_match.group(2) + "_get_inner(long arg);\n")
1294 out_c.write("JNIEXPORT jboolean JNICALL Java_org_ldk_impl_bindings_" + alias_match.group(2).replace("_", "_1") + "_1result_1ok (JNIEnv * env, jclass _a, jlong arg) {\n")
1295 out_c.write("\treturn ((" + alias_match.group(2) + "*)arg)->result_ok;\n")
1297 out_c.write("JNIEXPORT jlong JNICALL Java_org_ldk_impl_bindings_" + alias_match.group(2).replace("_", "_1") + "_1get_1inner (JNIEnv * env, jclass _a, jlong arg) {\n")
1298 contents_ty = alias_match.group(1).replace("LDKCResultTempl", "LDKCResultPtr")
1299 res_ty, err_ty = result_ptr_struct_items[contents_ty]
1300 out_c.write("\t" + alias_match.group(2) + " *val = (" + alias_match.group(2) + "*)arg;\n")
1301 out_c.write("\tif (val->result_ok) {\n")
1302 if res_ty not in opaque_structs:
1303 out_c.write("\t\treturn (long)val->contents.result;\n")
1305 out_c.write("\t\treturn (long)(val->contents.result->inner) | (val->contents.result->is_owned ? 1 : 0);\n")
1306 out_c.write("\t} else {\n")
1307 if err_ty not in opaque_structs:
1308 out_c.write("\t\treturn (long)val->contents.err;\n")
1310 out_c.write("\t\treturn (long)(val->contents.err->inner) | (val->contents.err->is_owned ? 1 : 0);\n")
1311 out_c.write("\t}\n}\n")
1313 elif fn_ptr is not None:
1314 map_fn(line, fn_ptr, None, None)
1315 elif fn_ret_arr is not None:
1316 map_fn(line, fn_ret_arr, fn_ret_arr.group(4), None)
1317 elif reg_fn is not None:
1318 map_fn(line, reg_fn, None, None)
1319 elif const_val_regex is not None:
1320 # TODO Map const variables
1323 assert(line == "\n")
1325 out_java.write("}\n")
1326 for struct_name in opaque_structs:
1327 with open(sys.argv[3] + "/structs/" + struct_name.replace("LDK","") + ".java", "a") as out_java_struct:
1328 out_java_struct.write("}\n")
1329 for struct_name in trait_structs:
1330 with open(sys.argv[3] + "/structs/" + struct_name.replace("LDK","") + ".java", "a") as out_java_struct:
1331 out_java_struct.write("}\n")