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")
50 def camel_to_snake(s):
51 # Convert camel case to snake case, in a way that appears to match cbindgen
57 if lastchar.isupper():
58 if not char.isupper() and not lastund:
63 ret = ret + lastchar.lower()
66 if char.isupper() and not lastund:
74 return (ret + lastchar.lower()).strip("_")
77 var_is_arr_regex = re.compile("\(\*([A-za-z0-9_]*)\)\[([a-z0-9]*)\]")
78 var_ty_regex = re.compile("([A-za-z_0-9]*)(.*)")
79 def java_c_types(fn_arg, ret_arr_len):
80 fn_arg = fn_arg.strip()
81 if fn_arg.startswith("MUST_USE_RES "):
84 if fn_arg.startswith("const "):
92 if fn_arg.startswith("LDKThirtyTwoBytes"):
93 fn_arg = "uint8_t (*" + fn_arg[18:] + ")[32]"
94 assert var_is_arr_regex.match(fn_arg[8:])
95 rust_obj = "LDKThirtyTwoBytes"
97 if fn_arg.startswith("LDKPublicKey"):
98 fn_arg = "uint8_t (*" + fn_arg[13:] + ")[33]"
99 assert var_is_arr_regex.match(fn_arg[8:])
100 rust_obj = "LDKPublicKey"
101 arr_access = "compressed_form"
102 if fn_arg.startswith("LDKSecretKey"):
103 fn_arg = "uint8_t (*" + fn_arg[13:] + ")[32]"
104 assert var_is_arr_regex.match(fn_arg[8:])
105 rust_obj = "LDKSecretKey"
107 if fn_arg.startswith("LDKSignature"):
108 fn_arg = "uint8_t (*" + fn_arg[13:] + ")[64]"
109 assert var_is_arr_regex.match(fn_arg[8:])
110 rust_obj = "LDKSignature"
111 arr_access = "compact_form"
112 if fn_arg.startswith("LDKThreeBytes"):
113 fn_arg = "uint8_t (*" + fn_arg[14:] + ")[3]"
114 assert var_is_arr_regex.match(fn_arg[8:])
115 rust_obj = "LDKThreeBytes"
117 if fn_arg.startswith("LDKu8slice"):
118 fn_arg = "uint8_t (*" + fn_arg[11:] + ")[datalen]"
119 assert var_is_arr_regex.match(fn_arg[8:])
120 rust_obj = "LDKu8slice"
123 if fn_arg.startswith("void"):
127 fn_arg = fn_arg[4:].strip()
128 elif fn_arg.startswith("bool"):
132 fn_arg = fn_arg[4:].strip()
133 elif fn_arg.startswith("uint8_t"):
137 fn_arg = fn_arg[7:].strip()
138 elif fn_arg.startswith("uint16_t"):
142 fn_arg = fn_arg[8:].strip()
143 elif fn_arg.startswith("uint32_t"):
147 fn_arg = fn_arg[8:].strip()
148 elif fn_arg.startswith("uint64_t") or fn_arg.startswith("uintptr_t"):
152 if fn_arg.startswith("uint64_t"):
153 fn_arg = fn_arg[8:].strip()
155 fn_arg = fn_arg[9:].strip()
156 elif is_const and fn_arg.startswith("char *"):
159 fn_ty_arg = "Ljava/lang/String;"
160 fn_arg = fn_arg[6:].strip()
162 ma = var_ty_regex.match(fn_arg)
163 if ma.group(1).strip() in unitary_enums:
164 java_ty = ma.group(1).strip()
166 fn_ty_arg = "Lorg/ldk/enums/" + ma.group(1).strip() + ";"
167 fn_arg = ma.group(2).strip()
168 rust_obj = ma.group(1).strip()
174 fn_arg = ma.group(2).strip()
175 rust_obj = ma.group(1).strip()
178 if fn_arg.startswith(" *") or fn_arg.startswith("*"):
179 fn_arg = fn_arg.replace("*", "").strip()
185 var_is_arr = var_is_arr_regex.match(fn_arg)
186 if var_is_arr is not None or ret_arr_len is not None:
187 assert(not take_by_ptr)
189 java_ty = java_ty + "[]"
190 c_ty = c_ty + "Array"
191 if var_is_arr is not None:
192 if var_is_arr.group(1) == "":
193 return TypeInfo(rust_obj=rust_obj, java_ty=java_ty, java_fn_ty_arg="[" + fn_ty_arg, c_ty=c_ty,
194 passed_as_ptr=False, is_ptr=False, var_name="arg", arr_len=var_is_arr.group(2), arr_access=arr_access)
195 return TypeInfo(rust_obj=rust_obj, java_ty=java_ty, java_fn_ty_arg="[" + fn_ty_arg, c_ty=c_ty,
196 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)
197 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,
198 is_ptr=is_ptr, var_name=fn_arg, arr_len=None, arr_access=None)
202 fn_ptr_regex = re.compile("^extern const ([A-Za-z_0-9\* ]*) \(\*(.*)\)\((.*)\);$")
203 fn_ret_arr_regex = re.compile("(.*) \(\*(.*)\((.*)\)\)\[([0-9]*)\];$")
204 reg_fn_regex = re.compile("([A-Za-z_0-9\* ]* \*?)([a-zA-Z_0-9]*)\((.*)\);$")
207 with open(sys.argv[1]) as in_h:
209 reg_fn = reg_fn_regex.match(line)
210 if reg_fn is not None:
211 if reg_fn.group(2).endswith("_clone"):
212 clone_fns.add(reg_fn.group(2))
214 rty = java_c_types(reg_fn.group(1), None)
215 if rty.rust_obj is not None and reg_fn.group(2) == rty.rust_obj.replace("LDK", "") + "_new":
216 constructor_fns[rty.rust_obj] = reg_fn.group(3)
218 arr_fn = fn_ret_arr_regex.match(line)
219 if arr_fn is not None:
220 if arr_fn.group(2).endswith("_clone"):
221 clone_fns.add(arr_fn.group(2))
222 # No object constructors return arrays, as then they wouldn't be an object constructor
225 with open(sys.argv[1]) as in_h, open(sys.argv[2], "w") as out_java, open(sys.argv[4], "w") as out_c:
226 opaque_structs = set()
227 trait_structs = set()
229 def map_type(fn_arg, print_void, ret_arr_len, is_free):
230 ty_info = java_c_types(fn_arg, ret_arr_len)
232 if ty_info.c_ty == "void":
234 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
235 arg_conv = None, arg_conv_name = None, arg_conv_cleanup = None,
236 ret_conv = None, ret_conv_name = None)
238 if ty_info.c_ty.endswith("Array"):
239 arr_len = ty_info.arr_len
240 if arr_len is not None:
241 arr_name = ty_info.var_name
244 arr_len = ret_arr_len
245 assert(ty_info.c_ty == "jbyteArray")
246 ret_conv = ("jbyteArray " + arr_name + "_arr = (*_env)->NewByteArray(_env, " + arr_len + ");\n" + "(*_env)->SetByteArrayRegion(_env, " + arr_name + "_arr, 0, " + arr_len + ", ", "")
247 arg_conv_cleanup = None
248 if not arr_len.isdigit():
249 arg_conv = ty_info.rust_obj + " " + arr_name + "_ref;\n"
250 arg_conv = arg_conv + arr_name + "_ref." + ty_info.arr_access + " = (*_env)->GetByteArrayElements (_env, " + arr_name + ", NULL);\n"
251 arg_conv = arg_conv + arr_name + "_ref." + arr_len + " = (*_env)->GetArrayLength (_env, " + arr_name + ");"
252 arg_conv_cleanup = "(*_env)->ReleaseByteArrayElements(_env, " + arr_name + ", (int8_t*)" + arr_name + "_ref." + ty_info.arr_access + ", 0);"
253 arr_access = "." + ty_info.arr_access
254 ret_conv = (ty_info.rust_obj + " " + arr_name + "_var = ", "")
255 ret_conv = (ret_conv[0], ";\njbyteArray " + arr_name + "_arr = (*_env)->NewByteArray(_env, " + arr_name + "_var." + arr_len + ");\n")
256 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 + ");")
257 elif ty_info.rust_obj is not None:
258 arg_conv = ty_info.rust_obj + " " + arr_name + "_ref;\n"
259 arg_conv = arg_conv + "CHECK((*_env)->GetArrayLength (_env, " + arr_name + ") == " + arr_len + ");\n"
260 arg_conv = arg_conv + "(*_env)->GetByteArrayRegion (_env, " + arr_name + ", 0, " + arr_len + ", " + arr_name + "_ref." + ty_info.arr_access + ");"
261 ret_conv = (ret_conv[0], "." + ty_info.arr_access + ");")
263 arg_conv = "unsigned char " + arr_name + "_arr[" + arr_len + "];\n"
264 arg_conv = arg_conv + "CHECK((*_env)->GetArrayLength (_env, " + arr_name + ") == " + arr_len + ");\n"
265 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;"
266 ret_conv = (ret_conv[0] + "*", ");")
267 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
268 arg_conv = arg_conv, arg_conv_name = arr_name + "_ref", arg_conv_cleanup = arg_conv_cleanup,
269 ret_conv = ret_conv, ret_conv_name = arr_name + "_arr")
270 elif ty_info.var_name != "":
271 # If we have a parameter name, print it (noting that it may indicate its a pointer)
272 if ty_info.rust_obj is not None:
273 assert(ty_info.passed_as_ptr)
274 opaque_arg_conv = ty_info.rust_obj + " " + ty_info.var_name + "_conv;\n"
275 opaque_arg_conv = opaque_arg_conv + ty_info.var_name + "_conv.inner = (void*)(" + ty_info.var_name + " & (~1));\n"
276 opaque_arg_conv = opaque_arg_conv + ty_info.var_name + "_conv.is_owned = (" + ty_info.var_name + " & 1) || (" + ty_info.var_name + " == 0);"
277 if not ty_info.is_ptr and not is_free:
278 if (ty_info.rust_obj.replace("LDK", "") + "_clone") in clone_fns:
279 # 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.
280 opaque_arg_conv = opaque_arg_conv + "\nif (" + ty_info.var_name + "_conv.inner != NULL)\n"
281 opaque_arg_conv = opaque_arg_conv + "\t" + ty_info.var_name + "_conv = " + ty_info.rust_obj.replace("LDK", "") + "_clone(&" + ty_info.var_name + "_conv);"
282 elif ty_info.passed_as_ptr:
283 opaque_arg_conv = opaque_arg_conv + "\n// Warning: we may need a move here but can't clone!"
284 if not ty_info.is_ptr:
285 if ty_info.rust_obj in unitary_enums:
286 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
287 arg_conv = ty_info.rust_obj + " " + ty_info.var_name + "_conv = " + ty_info.rust_obj + "_from_java(_env, " + ty_info.var_name + ");",
288 arg_conv_name = ty_info.var_name + "_conv",
289 arg_conv_cleanup = None,
290 ret_conv = ("jclass " + ty_info.var_name + "_conv = " + ty_info.rust_obj + "_to_java(_env, ", ");"),
291 ret_conv_name = ty_info.var_name + "_conv")
292 if ty_info.rust_obj in opaque_structs:
293 ret_conv_suf = ";\nCHECK((((long)" + ty_info.var_name + "_var.inner) & 1) == 0); // We rely on a free low bit, malloc guarantees this.\n"
294 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"
295 ret_conv_suf = ret_conv_suf + "long " + ty_info.var_name + "_ref;\n"
296 ret_conv_suf = ret_conv_suf + "if (" + ty_info.var_name + "_var.is_owned) {\n"
297 ret_conv_suf = ret_conv_suf + "\t" + ty_info.var_name + "_ref = (long)" + ty_info.var_name + "_var.inner | 1;\n"
298 ret_conv_suf = ret_conv_suf + "} else {\n"
299 ret_conv_suf = ret_conv_suf + "\t" + ty_info.var_name + "_ref = (long)&" + ty_info.var_name + "_var;\n"
300 ret_conv_suf = ret_conv_suf + "}"
301 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
302 arg_conv = opaque_arg_conv, arg_conv_name = ty_info.var_name + "_conv", arg_conv_cleanup = None,
303 ret_conv = (ty_info.rust_obj + " " + ty_info.var_name + "_var = ", ret_conv_suf),
304 ret_conv_name = ty_info.var_name + "_ref")
305 base_conv = ty_info.rust_obj + " " + ty_info.var_name + "_conv = *(" + ty_info.rust_obj + "*)" + ty_info.var_name + ";";
306 if ty_info.rust_obj in trait_structs:
308 base_conv = base_conv + "\nif (" + ty_info.var_name + "_conv.free == " + ty_info.rust_obj + "_JCalls_free) {\n"
309 base_conv = base_conv + "\t// If this_arg is a JCalls struct, then we need to increment the refcnt in it.\n"
310 base_conv = base_conv + "\t" + ty_info.rust_obj + "_JCalls_clone(" + ty_info.var_name + "_conv.this_arg);\n}"
312 base_conv = base_conv + "\n" + "FREE((void*)" + ty_info.var_name + ");"
313 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
314 arg_conv = base_conv, arg_conv_name = ty_info.var_name + "_conv", arg_conv_cleanup = None,
315 ret_conv = ("CANT PASS TRAIT TO Java?", ""), ret_conv_name = "NO CONV POSSIBLE")
316 if ty_info.rust_obj != "LDKu8slice":
317 # Don't bother free'ing slices passed in - Rust doesn't auto-free the
318 # underlying unlike Vecs, and it gives Java more freedom.
319 base_conv = base_conv + "\nFREE((void*)" + ty_info.var_name + ");";
320 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
321 arg_conv = base_conv, arg_conv_name = ty_info.var_name + "_conv", arg_conv_cleanup = None,
322 ret_conv = ("long " + ty_info.var_name + "_ref = (long)&", ";"), ret_conv_name = ty_info.var_name + "_ref")
325 if ty_info.rust_obj in opaque_structs:
326 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
327 arg_conv = opaque_arg_conv, arg_conv_name = "&" + ty_info.var_name + "_conv", arg_conv_cleanup = None,
328 ret_conv = None, ret_conv_name = None) # its a pointer, no conv needed
329 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
330 arg_conv = ty_info.rust_obj + "* " + ty_info.var_name + "_conv = (" + ty_info.rust_obj + "*)" + ty_info.var_name + ";",
331 arg_conv_name = ty_info.var_name + "_conv", arg_conv_cleanup = None,
332 ret_conv = None, ret_conv_name = None) # its a pointer, no conv needed
334 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
335 arg_conv = None, arg_conv_name = ty_info.var_name, arg_conv_cleanup = None, ret_conv = None, ret_conv_name = None)
336 elif ty_info.java_ty == "String":
337 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
338 arg_conv = None, arg_conv_name = None, arg_conv_cleanup = None,
339 ret_conv = ("jstring " + ty_info.var_name + "_conv = (*_env)->NewStringUTF(_env, ", ");"), ret_conv_name = ty_info.var_name + "_conv")
341 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
342 arg_conv = None, arg_conv_name = ty_info.var_name, arg_conv_cleanup = None, ret_conv = None, ret_conv_name = None)
344 # We don't have a parameter name, and want one, just call it arg
345 if ty_info.rust_obj is not None:
346 assert(not is_free or ty_info.rust_obj not in opaque_structs);
347 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
348 arg_conv = ty_info.rust_obj + " arg_conv = *(" + ty_info.rust_obj + "*)arg;\nFREE((void*)arg);",
349 arg_conv_name = "arg_conv", arg_conv_cleanup = None,
350 ret_conv = None, ret_conv_name = None)
353 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
354 arg_conv = None, arg_conv_name = "arg", arg_conv_cleanup = None, ret_conv = None, ret_conv_name = None)
356 # We don't have a parameter name, and don't want one (cause we're returning)
357 if ty_info.rust_obj is not None:
358 if not ty_info.is_ptr:
359 if ty_info.rust_obj in unitary_enums:
360 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
361 arg_conv = ty_info.rust_obj + " ret = " + ty_info.rust_obj + "_from_java(_env, " + ty_info.var_name + ");",
362 arg_conv_name = "ret", arg_conv_cleanup = None,
363 ret_conv = ("jclass ret = " + ty_info.rust_obj + "_to_java(_env, ", ");"), ret_conv_name = "ret")
364 if ty_info.rust_obj in opaque_structs:
365 # If we're returning a newly-allocated struct, we don't want Rust to ever
366 # free, instead relying on the Java GC to lose the ref. We undo this in
367 # any _free function.
368 # To avoid any issues, we first assert that the incoming object is non-ref.
369 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
370 ret_conv = (ty_info.rust_obj + " ret = ", ";"),
371 ret_conv_name = "((long)ret.inner) | (ret.is_owned ? 1 : 0)",
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 ret_conv = (ty_info.rust_obj + "* ret = MALLOC(sizeof(" + ty_info.rust_obj + "), \"" + ty_info.rust_obj + "\");\n*ret = ", ";"),
376 ret_conv_name = "(long)ret",
377 arg_conv = None, arg_conv_name = None, arg_conv_cleanup = None)
379 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
380 ret_conv = ("long ret = (long)", ";"), ret_conv_name = "ret",
381 arg_conv = None, arg_conv_name = None, arg_conv_cleanup = None)
383 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
384 arg_conv = None, arg_conv_name = None, arg_conv_cleanup = None, ret_conv = None, ret_conv_name = None)
386 def map_fn(line, re_match, ret_arr_len, c_call_string):
387 out_java.write("\t// " + line)
388 out_java.write("\tpublic static native ")
389 out_c.write("JNIEXPORT ")
391 is_free = re_match.group(2).endswith("_free")
392 struct_meth = re_match.group(2).split("_")[0]
394 ret_info = map_type(re_match.group(1), True, ret_arr_len, False)
397 if ret_info.ret_conv is not None:
398 ret_conv_pfx, ret_conv_sfx = ret_info.ret_conv
400 out_java.write(" " + re_match.group(2) + "(")
401 out_c.write(" JNICALL Java_org_ldk_impl_bindings_" + re_match.group(2).replace('_', '_1') + "(JNIEnv * _env, jclass _b")
404 default_constructor_args = {}
406 args_known = not ret_info.passed_as_ptr or ret_info.rust_obj in opaque_structs or ret_info.rust_obj in trait_structs
407 for idx, arg in enumerate(re_match.group(3).split(',')):
412 arg_conv_info = map_type(arg, False, None, is_free)
413 if arg_conv_info.c_ty != "void":
414 arg_conv_info.print_ty()
415 arg_conv_info.print_name()
416 if arg_conv_info.arg_name == "this_arg":
418 if arg_conv_info.passed_as_ptr and not arg_conv_info.rust_obj in opaque_structs:
419 if not arg_conv_info.rust_obj in trait_structs and not arg_conv_info.rust_obj in unitary_enums:
421 if arg_conv_info.arg_conv is not None and "Warning" in arg_conv_info.arg_conv:
422 if arg_conv_info.rust_obj in constructor_fns:
424 for explode_arg in constructor_fns[arg_conv_info.rust_obj].split(','):
425 explode_arg_conv = map_type(explode_arg, False, None, False)
426 if explode_arg_conv.c_ty == "void":
427 # We actually want to handle this case, but for now its only used in NetGraphMsgHandler::new()
428 # which ends up resulting in a redundant constructor - both without arguments for the NetworkGraph.
430 assert explode_arg_conv.arg_name != "this_arg"
431 if explode_arg_conv.passed_as_ptr and not explode_arg_conv.rust_obj in trait_structs:
433 if not arg_conv_info.arg_name in default_constructor_args:
434 default_constructor_args[arg_conv_info.arg_name] = []
435 default_constructor_args[arg_conv_info.arg_name].append(explode_arg_conv)
438 arg_names.append(arg_conv_info)
440 out_java_struct = None
441 if ("LDK" + struct_meth in opaque_structs or "LDK" + struct_meth in trait_structs) and not is_free:
442 out_java_struct = open(sys.argv[3] + "/structs/" + struct_meth + ".java", "a")
444 out_java_struct.write("\t// Skipped " + re_match.group(2) + "\n")
445 out_java_struct.close()
446 out_java_struct = None
448 out_java_struct.write("\tpublic ")
449 meth_n = re_match.group(2)[len(struct_meth) + 1:]
450 if ret_info.rust_obj == "LDK" + struct_meth:
451 out_java_struct.write(struct_meth + "(")
452 elif ret_info.rust_obj in opaque_structs or ret_info.rust_obj in trait_structs:
453 out_java_struct.write(ret_info.rust_obj.replace("LDK", "") + " " + meth_n + "(")
455 out_java_struct.write(ret_info.java_ty + " " + meth_n + "(")
456 for idx, arg in enumerate(arg_names):
458 if not takes_self or idx > 1:
459 out_java_struct.write(", ")
460 if arg.java_ty != "void" and arg.arg_name != "this_arg":
461 if arg.arg_name in default_constructor_args:
462 for explode_idx, explode_arg in enumerate(default_constructor_args[arg.arg_name]):
464 out_java_struct.write(", ")
465 assert explode_arg.rust_obj in opaque_structs or explode_arg.rust_obj in trait_structs
466 out_java_struct.write(explode_arg.rust_obj.replace("LDK", "") + " " + arg.arg_name + "_" + explode_arg.arg_name)
467 elif arg.passed_as_ptr:
468 if arg.rust_obj in opaque_structs or arg.rust_obj in trait_structs:
469 out_java_struct.write(arg.rust_obj.replace("LDK", "") + " " + arg.arg_name)
471 out_java_struct.write(arg.rust_obj + " " + arg.arg_name)
473 out_java_struct.write(arg.java_ty + " " + arg.arg_name)
476 out_java.write(");\n")
478 if out_java_struct is not None:
479 out_java_struct.write(") {\n")
481 for info in arg_names:
482 if info.arg_conv is not None:
483 out_c.write("\t" + info.arg_conv.replace('\n', "\n\t") + "\n")
485 if ret_info.ret_conv is not None:
486 out_c.write("\t" + ret_conv_pfx.replace('\n', '\n\t'))
487 elif ret_info.c_ty != "void":
488 out_c.write("\t" + ret_info.c_ty + " ret_val = ")
492 if c_call_string is None:
493 out_c.write(re_match.group(2) + "(")
495 out_c.write(c_call_string)
496 for idx, info in enumerate(arg_names):
497 if info.arg_conv_name is not None:
500 elif c_call_string is not None:
502 out_c.write(info.arg_conv_name)
504 if ret_info.ret_conv is not None:
505 out_c.write(ret_conv_sfx.replace('\n', '\n\t'))
508 for info in arg_names:
509 if info.arg_conv_cleanup is not None:
510 out_c.write("\n\t" + info.arg_conv_cleanup.replace("\n", "\n\t"))
511 if ret_info.ret_conv is not None:
512 out_c.write("\n\treturn " + ret_info.ret_conv_name + ";")
513 elif ret_info.c_ty != "void":
514 out_c.write("\n\treturn ret_val;")
515 out_c.write("\n}\n\n")
516 if out_java_struct is not None:
517 out_java_struct.write("\t\t")
518 if ret_info.rust_obj == "LDK" + struct_meth:
519 out_java_struct.write("super(")
520 elif ret_info.java_ty != "void" and not ret_info.passed_as_ptr:
521 out_java_struct.write(ret_info.java_ty + " ret = ")
522 elif ret_info.java_ty != "void":
523 out_java_struct.write(ret_info.rust_obj.replace("LDK", "") + " ret = ")
524 if ret_info.rust_obj in opaque_structs or ret_info.rust_obj in trait_structs:
525 out_java_struct.write("new " + ret_info.rust_obj.replace("LDK", "") + "(null, ")
526 out_java_struct.write("bindings." + re_match.group(2) + "(")
527 for idx, info in enumerate(arg_names):
529 out_java_struct.write(", ")
530 if info.arg_name == "this_arg":
531 out_java_struct.write("this.ptr")
532 elif info.arg_name in default_constructor_args:
533 out_java_struct.write("bindings." + info.rust_obj.replace("LDK", "") + "_new(")
534 for explode_idx, explode_arg in enumerate(default_constructor_args[info.arg_name]):
536 out_java_struct.write(", ")
537 assert explode_arg.passed_as_ptr and explode_arg.rust_obj in trait_structs
538 expl_arg_name = info.arg_name + "_" + explode_arg.arg_name
539 out_java_struct.write(expl_arg_name + " == null ? 0 : " + expl_arg_name + ".ptr")
540 out_java_struct.write(")")
541 elif info.passed_as_ptr and info.rust_obj in opaque_structs:
542 out_java_struct.write(info.arg_name + " == null ? 0 : " + info.arg_name + ".ptr & ~1")
543 elif info.passed_as_ptr and info.rust_obj in trait_structs:
544 out_java_struct.write(info.arg_name + " == null ? 0 : " + info.arg_name + ".ptr")
546 out_java_struct.write(info.arg_name)
547 out_java_struct.write(")")
548 if ret_info.rust_obj == "LDK" + struct_meth:
549 out_java_struct.write(");\n")
550 elif ret_info.rust_obj in opaque_structs:
551 out_java_struct.write(");\n")
552 elif ret_info.rust_obj in trait_structs:
553 out_java_struct.write(");\n\t\tret.ptrs_to.add(this);\n")
555 out_java_struct.write(";\n")
557 for info in arg_names:
558 if info.arg_name == "this_arg":
560 elif info.arg_name in default_constructor_args:
561 for explode_arg in default_constructor_args[info.arg_name]:
562 out_java_struct.write("\t\tthis.ptrs_to.add(" + info.arg_name + "_" + explode_arg.arg_name + ");\n")
563 elif info.passed_as_ptr and (info.rust_obj in opaque_structs or info.rust_obj in trait_structs):
564 out_java_struct.write("\t\tthis.ptrs_to.add(" + info.arg_name + ");\n")
566 if ret_info.java_ty != "void" and ret_info.rust_obj != "LDK" + struct_meth:
567 out_java_struct.write("\t\treturn ret;\n")
568 out_java_struct.write("\t}\n\n")
569 out_java_struct.close()
571 def map_unitary_enum(struct_name, field_lines):
572 with open(sys.argv[3] + "/enums/" + struct_name + ".java", "w") as out_java_enum:
573 out_java_enum.write("package org.ldk.enums;\n\n")
574 unitary_enums.add(struct_name)
575 out_c.write("static inline " + struct_name + " " + struct_name + "_from_java(JNIEnv *env, jclass val) {\n")
576 out_c.write("\tswitch ((*env)->CallIntMethod(env, val, ordinal_meth)) {\n")
578 for idx, struct_line in enumerate(field_lines):
580 out_java_enum.write("public enum " + struct_name + " {\n")
581 elif idx == len(field_lines) - 3:
582 assert(struct_line.endswith("_Sentinel,"))
583 elif idx == len(field_lines) - 2:
584 out_java_enum.write("\t; static native void init();\n")
585 out_java_enum.write("\tstatic { init(); }\n")
586 out_java_enum.write("}")
587 out_java.write("\tstatic { " + struct_name + ".values(); /* Force enum statics to run */ }\n")
588 elif idx == len(field_lines) - 1:
589 assert(struct_line == "")
591 out_java_enum.write(struct_line + "\n")
592 out_c.write("\t\tcase %d: return %s;\n" % (ord_v, struct_line.strip().strip(",")))
595 out_c.write("\tabort();\n")
599 out_c.write("static jclass " + struct_name + "_class = NULL;\n")
600 for idx, struct_line in enumerate(field_lines):
601 if idx > 0 and idx < len(field_lines) - 3:
602 variant = struct_line.strip().strip(",")
603 out_c.write("static jfieldID " + struct_name + "_" + variant + " = NULL;\n")
604 out_c.write("JNIEXPORT void JNICALL Java_org_ldk_enums_" + struct_name.replace("_", "_1") + "_init (JNIEnv * env, jclass clz) {\n")
605 out_c.write("\t" + struct_name + "_class = (*env)->NewGlobalRef(env, clz);\n")
606 out_c.write("\tCHECK(" + struct_name + "_class != NULL);\n")
607 for idx, struct_line in enumerate(field_lines):
608 if idx > 0 and idx < len(field_lines) - 3:
609 variant = struct_line.strip().strip(",")
610 out_c.write("\t" + struct_name + "_" + variant + " = (*env)->GetStaticFieldID(env, " + struct_name + "_class, \"" + variant + "\", \"Lorg/ldk/enums/" + struct_name + ";\");\n")
611 out_c.write("\tCHECK(" + struct_name + "_" + variant + " != NULL);\n")
613 out_c.write("static inline jclass " + struct_name + "_to_java(JNIEnv *env, " + struct_name + " val) {\n")
614 out_c.write("\tswitch (val) {\n")
615 for idx, struct_line in enumerate(field_lines):
616 if idx > 0 and idx < len(field_lines) - 3:
617 variant = struct_line.strip().strip(",")
618 out_c.write("\t\tcase " + variant + ":\n")
619 out_c.write("\t\t\treturn (*env)->GetStaticObjectField(env, " + struct_name + "_class, " + struct_name + "_" + variant + ");\n")
621 out_c.write("\t\tdefault: abort();\n")
625 def map_complex_enum(struct_name, union_enum_items):
626 tag_field_lines = union_enum_items["field_lines"]
627 init_meth_jty_strs = {}
628 for idx, struct_line in enumerate(tag_field_lines):
630 out_java.write("\tpublic static class " + struct_name + " {\n")
631 out_java.write("\t\tprivate " + struct_name + "() {}\n")
632 elif idx == len(tag_field_lines) - 3:
633 assert(struct_line.endswith("_Sentinel,"))
634 elif idx == len(tag_field_lines) - 2:
635 out_java.write("\t\tstatic native void init();\n")
636 out_java.write("\t}\n")
637 elif idx == len(tag_field_lines) - 1:
638 assert(struct_line == "")
640 var_name = struct_line.strip(' ,')[len(struct_name) + 1:]
641 out_java.write("\t\tpublic final static class " + var_name + " extends " + struct_name + " {\n")
642 out_c.write("static jclass " + struct_name + "_" + var_name + "_class = NULL;\n")
643 out_c.write("static jmethodID " + struct_name + "_" + var_name + "_meth = NULL;\n")
644 init_meth_jty_str = ""
645 init_meth_params = ""
647 if "LDK" + var_name in union_enum_items:
648 enum_var_lines = union_enum_items["LDK" + var_name]
649 for idx, field in enumerate(enum_var_lines):
650 if idx != 0 and idx < len(enum_var_lines) - 2:
651 field_ty = java_c_types(field.strip(' ;'), None)
652 out_java.write("\t\t\tpublic " + field_ty.java_ty + " " + field_ty.var_name + ";\n")
653 init_meth_jty_str = init_meth_jty_str + field_ty.java_fn_ty_arg
655 init_meth_params = init_meth_params + ", "
656 init_meth_params = init_meth_params + field_ty.java_ty + " " + field_ty.var_name
657 init_meth_body = init_meth_body + "this." + field_ty.var_name + " = " + field_ty.var_name + "; "
658 out_java.write("\t\t\t" + var_name + "(" + init_meth_params + ") { ")
659 out_java.write(init_meth_body)
660 out_java.write("}\n")
661 out_java.write("\t\t}\n")
662 init_meth_jty_strs[var_name] = init_meth_jty_str
663 out_java.write("\tstatic { " + struct_name + ".init(); }\n")
664 out_java.write("\tpublic static native " + struct_name + " " + struct_name + "_ref_from_ptr(long ptr);\n");
666 out_c.write("JNIEXPORT void JNICALL Java_org_ldk_impl_bindings_00024" + struct_name.replace("_", "_1") + "_init (JNIEnv * env, jclass _a) {\n")
667 for idx, struct_line in enumerate(tag_field_lines):
668 if idx != 0 and idx < len(tag_field_lines) - 3:
669 var_name = struct_line.strip(' ,')[len(struct_name) + 1:]
670 out_c.write("\t" + struct_name + "_" + var_name + "_class =\n")
671 out_c.write("\t\t(*env)->NewGlobalRef(env, (*env)->FindClass(env, \"Lorg/ldk/impl/bindings$" + struct_name + "$" + var_name + ";\"));\n")
672 out_c.write("\tCHECK(" + struct_name + "_" + var_name + "_class != NULL);\n")
673 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")
674 out_c.write("\tCHECK(" + struct_name + "_" + var_name + "_meth != NULL);\n")
676 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")
677 out_c.write("\t" + struct_name + " *obj = (" + struct_name + "*)ptr;\n")
678 out_c.write("\tswitch(obj->tag) {\n")
679 for idx, struct_line in enumerate(tag_field_lines):
680 if idx != 0 and idx < len(tag_field_lines) - 3:
681 var_name = struct_line.strip(' ,')[len(struct_name) + 1:]
682 out_c.write("\t\tcase " + struct_name + "_" + var_name + ": {\n")
684 if "LDK" + var_name in union_enum_items:
685 enum_var_lines = union_enum_items["LDK" + var_name]
686 for idx, field in enumerate(enum_var_lines):
687 if idx != 0 and idx < len(enum_var_lines) - 2:
688 field_map = map_type(field.strip(' ;'), False, None, False)
689 if field_map.ret_conv is not None:
690 out_c.write("\t\t\t" + field_map.ret_conv[0].replace("\n", "\n\t\t\t").replace("_env", "env"))
691 out_c.write("obj->" + camel_to_snake(var_name) + "." + field_map.arg_name)
692 out_c.write(field_map.ret_conv[1].replace("\n", "\n\t\t\t") + "\n")
693 c_params_text = c_params_text + ", " + field_map.ret_conv_name
695 c_params_text = c_params_text + ", obj->" + camel_to_snake(var_name) + "." + field_map.arg_name
696 out_c.write("\t\t\treturn (*env)->NewObject(env, " + struct_name + "_" + var_name + "_class, " + struct_name + "_" + var_name + "_meth" + c_params_text + ");\n")
697 out_c.write("\t\t}\n")
698 out_c.write("\t\tdefault: abort();\n")
699 out_c.write("\t}\n}\n")
701 def map_trait(struct_name, field_var_lines, trait_fn_lines):
702 with open(sys.argv[3] + "/structs/" + struct_name.replace("LDK","") + ".java", "w") as out_java_trait:
703 out_c.write("typedef struct " + struct_name + "_JCalls {\n")
704 out_c.write("\tatomic_size_t refcnt;\n")
705 out_c.write("\tJavaVM *vm;\n")
706 out_c.write("\tjweak o;\n")
707 for var_line in field_var_lines:
708 if var_line.group(1) in trait_structs:
709 out_c.write("\t" + var_line.group(1) + "_JCalls* " + var_line.group(2) + ";\n")
710 for fn_line in trait_fn_lines:
711 if fn_line.group(2) != "free" and fn_line.group(2) != "clone":
712 out_c.write("\tjmethodID " + fn_line.group(2) + "_meth;\n")
713 out_c.write("} " + struct_name + "_JCalls;\n")
715 out_java_trait.write("package org.ldk.structs;\n\n")
716 out_java_trait.write("import org.ldk.impl.bindings;\n\n")
717 out_java_trait.write("import org.ldk.enums.*;\n\n")
718 out_java_trait.write("public class " + struct_name.replace("LDK","") + " extends CommonBase {\n")
719 out_java_trait.write("\t" + struct_name.replace("LDK", "") + "(Object _dummy, long ptr) { super(ptr); }\n")
720 out_java_trait.write("\tpublic " + struct_name.replace("LDK", "") + "(bindings." + struct_name + " arg")
721 for var_line in field_var_lines:
722 if var_line.group(1) in trait_structs:
723 out_java_trait.write(", bindings." + var_line.group(1) + " " + var_line.group(2))
724 out_java_trait.write(") {\n")
725 out_java_trait.write("\t\tsuper(bindings." + struct_name + "_new(arg")
726 for var_line in field_var_lines:
727 if var_line.group(1) in trait_structs:
728 out_java_trait.write(", " + var_line.group(2))
729 out_java_trait.write("));\n")
730 out_java_trait.write("\t\tthis.ptrs_to.add(arg);\n")
731 out_java_trait.write("\t}\n")
732 out_java_trait.write("\t@Override @SuppressWarnings(\"deprecation\")\n")
733 out_java_trait.write("\tprotected void finalize() throws Throwable {\n")
734 out_java_trait.write("\t\tbindings." + struct_name.replace("LDK","") + "_free(ptr); super.finalize();\n")
735 out_java_trait.write("\t}\n\n")
737 out_java.write("\tpublic interface " + struct_name + " {\n")
739 for fn_line in trait_fn_lines:
740 java_meth_descr = "("
741 if fn_line.group(2) != "free" and fn_line.group(2) != "clone":
742 ret_ty_info = java_c_types(fn_line.group(1), None)
744 out_java.write("\t\t " + ret_ty_info.java_ty + " " + fn_line.group(2) + "(")
745 is_const = fn_line.group(3) is not None
746 out_c.write(fn_line.group(1) + fn_line.group(2) + "_jcall(")
748 out_c.write("const void* this_arg")
750 out_c.write("void* this_arg")
753 for idx, arg in enumerate(fn_line.group(4).split(',')):
759 arg_conv_info = map_type(arg, True, None, False)
760 out_c.write(arg.strip())
761 out_java.write(arg_conv_info.java_ty + " " + arg_conv_info.arg_name)
762 arg_names.append(arg_conv_info)
763 java_meth_descr = java_meth_descr + arg_conv_info.java_fn_ty_arg
764 java_meth_descr = java_meth_descr + ")" + ret_ty_info.java_fn_ty_arg
765 java_meths.append(java_meth_descr)
767 out_java.write(");\n")
769 out_c.write("\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n")
770 out_c.write("\tJNIEnv *env;\n")
771 out_c.write("\tDO_ASSERT((*j_calls->vm)->GetEnv(j_calls->vm, (void**)&env, JNI_VERSION_1_8) == JNI_OK);\n")
773 for arg_info in arg_names:
774 if arg_info.ret_conv is not None:
775 out_c.write("\t" + arg_info.ret_conv[0].replace('\n', '\n\t').replace("_env", "env"));
776 out_c.write(arg_info.arg_name)
777 out_c.write(arg_info.ret_conv[1].replace('\n', '\n\t').replace("_env", "env") + "\n")
779 out_c.write("\tjobject obj = (*env)->NewLocalRef(env, j_calls->o);\n\tCHECK(obj != NULL);\n")
780 if ret_ty_info.c_ty.endswith("Array"):
781 assert(ret_ty_info.c_ty == "jbyteArray")
782 out_c.write("\tjbyteArray jret = (*env)->CallObjectMethod(env, obj, j_calls->" + fn_line.group(2) + "_meth")
783 elif not ret_ty_info.passed_as_ptr:
784 out_c.write("\treturn (*env)->Call" + ret_ty_info.java_ty.title() + "Method(env, obj, j_calls->" + fn_line.group(2) + "_meth")
786 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");
788 for arg_info in arg_names:
789 if arg_info.ret_conv is not None:
790 out_c.write(", " + arg_info.ret_conv_name)
792 out_c.write(", " + arg_info.arg_name)
794 if ret_ty_info.c_ty.endswith("Array"):
795 out_c.write("\t" + ret_ty_info.rust_obj + " ret;\n")
796 out_c.write("\tCHECK((*env)->GetArrayLength(env, jret) == " + ret_ty_info.arr_len + ");\n")
797 out_c.write("\t(*env)->GetByteArrayRegion(env, jret, 0, " + ret_ty_info.arr_len + ", ret." + ret_ty_info.arr_access + ");\n")
798 out_c.write("\treturn ret;\n")
800 if ret_ty_info.passed_as_ptr:
801 out_c.write("\t" + fn_line.group(1).strip() + " res = *ret;\n")
802 out_c.write("\tFREE(ret);\n")
803 out_c.write("\treturn res;\n")
805 elif fn_line.group(2) == "free":
806 out_c.write("static void " + struct_name + "_JCalls_free(void* this_arg) {\n")
807 out_c.write("\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n")
808 out_c.write("\tif (atomic_fetch_sub_explicit(&j_calls->refcnt, 1, memory_order_acquire) == 1) {\n")
809 out_c.write("\t\tJNIEnv *env;\n")
810 out_c.write("\t\tDO_ASSERT((*j_calls->vm)->GetEnv(j_calls->vm, (void**)&env, JNI_VERSION_1_8) == JNI_OK);\n")
811 out_c.write("\t\t(*env)->DeleteWeakGlobalRef(env, j_calls->o);\n")
812 out_c.write("\t\tFREE(j_calls);\n")
813 out_c.write("\t}\n}\n")
815 # Write out a clone function whether we need one or not, as we use them in moving to rust
816 out_c.write("static void* " + struct_name + "_JCalls_clone(const void* this_arg) {\n")
817 out_c.write("\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n")
818 out_c.write("\tatomic_fetch_add_explicit(&j_calls->refcnt, 1, memory_order_release);\n")
819 for var_line in field_var_lines:
820 if var_line.group(1) in trait_structs:
821 out_c.write("\tatomic_fetch_add_explicit(&j_calls->" + var_line.group(2) + "->refcnt, 1, memory_order_release);\n")
822 out_c.write("\treturn (void*) this_arg;\n")
825 out_java.write("\t}\n")
827 out_java.write("\tpublic static native long " + struct_name + "_new(" + struct_name + " impl")
828 out_c.write("static inline " + struct_name + " " + struct_name + "_init (JNIEnv * env, jclass _a, jobject o")
829 for var_line in field_var_lines:
830 if var_line.group(1) in trait_structs:
831 out_java.write(", " + var_line.group(1) + " " + var_line.group(2))
832 out_c.write(", jobject " + var_line.group(2))
833 out_java.write(");\n")
836 out_c.write("\tjclass c = (*env)->GetObjectClass(env, o);\n")
837 out_c.write("\tCHECK(c != NULL);\n")
838 out_c.write("\t" + struct_name + "_JCalls *calls = MALLOC(sizeof(" + struct_name + "_JCalls), \"" + struct_name + "_JCalls\");\n")
839 out_c.write("\tatomic_init(&calls->refcnt, 1);\n")
840 out_c.write("\tDO_ASSERT((*env)->GetJavaVM(env, &calls->vm) == 0);\n")
841 out_c.write("\tcalls->o = (*env)->NewWeakGlobalRef(env, o);\n")
842 for (fn_line, java_meth_descr) in zip(trait_fn_lines, java_meths):
843 if fn_line.group(2) != "free" and fn_line.group(2) != "clone":
844 out_c.write("\tcalls->" + fn_line.group(2) + "_meth = (*env)->GetMethodID(env, c, \"" + fn_line.group(2) + "\", \"" + java_meth_descr + "\");\n")
845 out_c.write("\tCHECK(calls->" + fn_line.group(2) + "_meth != NULL);\n")
846 out_c.write("\n\t" + struct_name + " ret = {\n")
847 out_c.write("\t\t.this_arg = (void*) calls,\n")
848 for fn_line in trait_fn_lines:
849 if fn_line.group(2) != "free" and fn_line.group(2) != "clone":
850 out_c.write("\t\t." + fn_line.group(2) + " = " + fn_line.group(2) + "_jcall,\n")
851 elif fn_line.group(2) == "free":
852 out_c.write("\t\t.free = " + struct_name + "_JCalls_free,\n")
854 clone_fns.add(struct_name + "_clone")
855 out_c.write("\t\t.clone = " + struct_name + "_JCalls_clone,\n")
856 for var_line in field_var_lines:
857 if var_line.group(1) in trait_structs:
858 out_c.write("\t\t." + var_line.group(2) + " = " + var_line.group(1) + "_init(env, _a, " + var_line.group(2) + "),\n")
859 out_c.write("\t};\n")
860 for var_line in field_var_lines:
861 if var_line.group(1) in trait_structs:
862 out_c.write("\tcalls->" + var_line.group(2) + " = ret." + var_line.group(2) + ".this_arg;\n")
863 out_c.write("\treturn ret;\n")
866 out_c.write("JNIEXPORT long JNICALL Java_org_ldk_impl_bindings_" + struct_name.replace("_", "_1") + "_1new (JNIEnv * env, jclass _a, jobject o")
867 for var_line in field_var_lines:
868 if var_line.group(1) in trait_structs:
869 out_c.write(", jobject " + var_line.group(2))
871 out_c.write("\t" + struct_name + " *res_ptr = MALLOC(sizeof(" + struct_name + "), \"" + struct_name + "\");\n")
872 out_c.write("\t*res_ptr = " + struct_name + "_init(env, _a, o")
873 for var_line in field_var_lines:
874 if var_line.group(1) in trait_structs:
875 out_c.write(", " + var_line.group(2))
877 out_c.write("\treturn (long)res_ptr;\n")
880 out_java.write("\tpublic static native " + struct_name + " " + struct_name + "_get_obj_from_jcalls(long val);\n")
881 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")
882 out_c.write("\tjobject ret = (*env)->NewLocalRef(env, ((" + struct_name + "_JCalls*)val)->o);\n")
883 out_c.write("\tCHECK(ret != NULL);\n")
884 out_c.write("\treturn ret;\n")
887 for fn_line in trait_fn_lines:
888 # For now, just disable enabling the _call_log - we don't know how to inverse-map String
889 is_log = fn_line.group(2) == "log" and struct_name == "LDKLogger"
890 if fn_line.group(2) != "free" and fn_line.group(2) != "clone" and fn_line.group(2) != "eq" and not is_log:
891 dummy_line = fn_line.group(1) + struct_name.replace("LDK", "") + "_" + fn_line.group(2) + " " + struct_name + "* this_arg" + fn_line.group(4) + "\n"
892 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")
894 out_c.write("""#include \"org_ldk_impl_bindings.h\"
895 #include <rust_types.h>
896 #include <lightning.h>
898 #include <stdatomic.h>
901 if sys.argv[4] == "false":
902 out_c.write("#define MALLOC(a, _) malloc(a)\n")
903 out_c.write("#define FREE free\n")
904 out_c.write("#define DO_ASSERT(a) (void)(a)\n")
905 out_c.write("#define CHECK(a)\n")
907 out_c.write("""#include <assert.h>
908 // Always run a, then assert it is true:
909 #define DO_ASSERT(a) do { bool _assert_val = (a); assert(_assert_val); } while(0)
910 // Assert a is true or do nothing
911 #define CHECK(a) DO_ASSERT(a)
913 // Running a leak check across all the allocations and frees of the JDK is a mess,
914 // so instead we implement our own naive leak checker here, relying on the -wrap
915 // linker option to wrap malloc/calloc/realloc/free, tracking everyhing allocated
916 // and free'd in Rust or C across the generated bindings shared library.
918 #include <execinfo.h>
920 static mtx_t allocation_mtx;
922 void __attribute__((constructor)) init_mtx() {
923 DO_ASSERT(mtx_init(&allocation_mtx, mtx_plain) == thrd_success);
927 typedef struct allocation {
928 struct allocation* next;
930 const char* struct_name;
934 static allocation* allocation_ll = NULL;
936 void* __real_malloc(size_t len);
937 void* __real_calloc(size_t nmemb, size_t len);
938 static void new_allocation(void* res, const char* struct_name) {
939 allocation* new_alloc = __real_malloc(sizeof(allocation));
940 new_alloc->ptr = res;
941 new_alloc->struct_name = struct_name;
942 new_alloc->bt_len = backtrace(new_alloc->bt, BT_MAX);
943 DO_ASSERT(mtx_lock(&allocation_mtx) == thrd_success);
944 new_alloc->next = allocation_ll;
945 allocation_ll = new_alloc;
946 DO_ASSERT(mtx_unlock(&allocation_mtx) == thrd_success);
948 static void* MALLOC(size_t len, const char* struct_name) {
949 void* res = __real_malloc(len);
950 new_allocation(res, struct_name);
953 void __real_free(void* ptr);
954 static void alloc_freed(void* ptr) {
955 allocation* p = NULL;
956 DO_ASSERT(mtx_lock(&allocation_mtx) == thrd_success);
957 allocation* it = allocation_ll;
958 while (it->ptr != ptr) { p = it; it = it->next; }
959 if (p) { p->next = it->next; } else { allocation_ll = it->next; }
960 DO_ASSERT(mtx_unlock(&allocation_mtx) == thrd_success);
961 DO_ASSERT(it->ptr == ptr);
964 static void FREE(void* ptr) {
969 void* __wrap_malloc(size_t len) {
970 void* res = __real_malloc(len);
971 new_allocation(res, "malloc call");
974 void* __wrap_calloc(size_t nmemb, size_t len) {
975 void* res = __real_calloc(nmemb, len);
976 new_allocation(res, "calloc call");
979 void __wrap_free(void* ptr) {
984 void* __real_realloc(void* ptr, size_t newlen);
985 void* __wrap_realloc(void* ptr, size_t len) {
987 void* res = __real_realloc(ptr, len);
988 new_allocation(res, "realloc call");
991 void __wrap_reallocarray(void* ptr, size_t new_sz) {
992 // Rust doesn't seem to use reallocarray currently
996 void __attribute__((destructor)) check_leaks() {
997 for (allocation* a = allocation_ll; a != NULL; a = a->next) {
998 fprintf(stderr, "%s %p remains:\\n", a->struct_name, a->ptr);
999 backtrace_symbols_fd(a->bt, a->bt_len, STDERR_FILENO);
1000 fprintf(stderr, "\\n\\n");
1002 DO_ASSERT(allocation_ll == NULL);
1005 out_java.write("""package org.ldk.impl;
1006 import org.ldk.enums.*;
1008 public class bindings {
1009 public static class VecOrSliceDef {
1010 public long dataptr;
1011 public long datalen;
1013 public VecOrSliceDef(long dataptr, long datalen, long stride) {
1014 this.dataptr = dataptr; this.datalen = datalen; this.stride = stride;
1018 System.loadLibrary(\"lightningjni\");
1019 init(java.lang.Enum.class, VecOrSliceDef.class);
1021 static native void init(java.lang.Class c, java.lang.Class slicedef);
1023 public static native boolean deref_bool(long ptr);
1024 public static native long deref_long(long ptr);
1025 public static native void free_heap_ptr(long ptr);
1026 public static native byte[] read_bytes(long ptr, long len);
1027 public static native byte[] get_u8_slice_bytes(long slice_ptr);
1028 public static native long bytes_to_u8_vec(byte[] bytes);
1029 public static native long new_txpointer_copy_data(byte[] txdata);
1030 public static native long vec_slice_len(long vec);
1031 public static native long new_empty_slice_vec();
1035 static jmethodID ordinal_meth = NULL;
1036 static jmethodID slicedef_meth = NULL;
1037 static jclass slicedef_cls = NULL;
1038 JNIEXPORT void Java_org_ldk_impl_bindings_init(JNIEnv * env, jclass _b, jclass enum_class, jclass slicedef_class) {
1039 ordinal_meth = (*env)->GetMethodID(env, enum_class, "ordinal", "()I");
1040 CHECK(ordinal_meth != NULL);
1041 slicedef_meth = (*env)->GetMethodID(env, slicedef_class, "<init>", "(JJJ)V");
1042 CHECK(slicedef_meth != NULL);
1043 slicedef_cls = (*env)->NewGlobalRef(env, slicedef_class);
1044 CHECK(slicedef_cls != NULL);
1047 JNIEXPORT jboolean JNICALL Java_org_ldk_impl_bindings_deref_1bool (JNIEnv * env, jclass _a, jlong ptr) {
1048 return *((bool*)ptr);
1050 JNIEXPORT jlong JNICALL Java_org_ldk_impl_bindings_deref_1long (JNIEnv * env, jclass _a, jlong ptr) {
1051 return *((long*)ptr);
1053 JNIEXPORT void JNICALL Java_org_ldk_impl_bindings_free_1heap_1ptr (JNIEnv * env, jclass _a, jlong ptr) {
1056 JNIEXPORT jbyteArray JNICALL Java_org_ldk_impl_bindings_read_1bytes (JNIEnv * _env, jclass _b, jlong ptr, jlong len) {
1057 jbyteArray ret_arr = (*_env)->NewByteArray(_env, len);
1058 (*_env)->SetByteArrayRegion(_env, ret_arr, 0, len, (unsigned char*)ptr);
1061 JNIEXPORT jbyteArray JNICALL Java_org_ldk_impl_bindings_get_1u8_1slice_1bytes (JNIEnv * _env, jclass _b, jlong slice_ptr) {
1062 LDKu8slice *slice = (LDKu8slice*)slice_ptr;
1063 jbyteArray ret_arr = (*_env)->NewByteArray(_env, slice->datalen);
1064 (*_env)->SetByteArrayRegion(_env, ret_arr, 0, slice->datalen, slice->data);
1067 JNIEXPORT long JNICALL Java_org_ldk_impl_bindings_bytes_1to_1u8_1vec (JNIEnv * _env, jclass _b, jbyteArray bytes) {
1068 LDKCVec_u8Z *vec = (LDKCVec_u8Z*)MALLOC(sizeof(LDKCVec_u8Z), "LDKCVec_u8");
1069 vec->datalen = (*_env)->GetArrayLength(_env, bytes);
1070 vec->data = (uint8_t*)MALLOC(vec->datalen, "LDKCVec_u8Z Bytes");
1071 (*_env)->GetByteArrayRegion (_env, bytes, 0, vec->datalen, vec->data);
1074 JNIEXPORT long JNICALL Java_org_ldk_impl_bindings_new_1txpointer_1copy_1data (JNIEnv * env, jclass _b, jbyteArray bytes) {
1075 LDKTransaction *txdata = (LDKTransaction*)MALLOC(sizeof(LDKTransaction), "LDKTransaction");
1076 txdata->datalen = (*env)->GetArrayLength(env, bytes);
1077 txdata->data = (uint8_t*)MALLOC(txdata->datalen, "Tx Data Bytes");
1078 txdata->data_is_owned = true;
1079 (*env)->GetByteArrayRegion (env, bytes, 0, txdata->datalen, txdata->data);
1080 return (long)txdata;
1082 JNIEXPORT jlong JNICALL Java_org_ldk_impl_bindings_vec_1slice_1len (JNIEnv * env, jclass _a, jlong ptr) {
1083 // Check offsets of a few Vec types are all consistent as we're meant to be generic across types
1084 _Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKCVec_SignatureZ, datalen), "Vec<*> needs to be mapped identically");
1085 _Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKCVec_MessageSendEventZ, datalen), "Vec<*> needs to be mapped identically");
1086 _Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKCVec_EventZ, datalen), "Vec<*> needs to be mapped identically");
1087 _Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKCVec_C2Tuple_usizeTransactionZZ, datalen), "Vec<*> needs to be mapped identically");
1088 LDKCVec_u8Z *vec = (LDKCVec_u8Z*)ptr;
1089 return (long)vec->datalen;
1091 JNIEXPORT long JNICALL Java_org_ldk_impl_bindings_new_1empty_1slice_1vec (JNIEnv * _env, jclass _b) {
1092 // Check sizes of a few Vec types are all consistent as we're meant to be generic across types
1093 _Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKCVec_SignatureZ), "Vec<*> needs to be mapped identically");
1094 _Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKCVec_MessageSendEventZ), "Vec<*> needs to be mapped identically");
1095 _Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKCVec_EventZ), "Vec<*> needs to be mapped identically");
1096 _Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKCVec_C2Tuple_usizeTransactionZZ), "Vec<*> needs to be mapped identically");
1097 LDKCVec_u8Z *vec = (LDKCVec_u8Z*)MALLOC(sizeof(LDKCVec_u8Z), "Empty LDKCVec");
1103 // We assume that CVec_u8Z and u8slice are the same size and layout (and thus pointers to the two can be mixed)
1104 _Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKu8slice), "Vec<u8> and [u8] need to have been mapped identically");
1105 _Static_assert(offsetof(LDKCVec_u8Z, data) == offsetof(LDKu8slice, data), "Vec<u8> and [u8] need to have been mapped identically");
1106 _Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKu8slice, datalen), "Vec<u8> and [u8] need to have been mapped identically");
1110 with open(sys.argv[3] + "/structs/CommonBase.java", "a") as out_java_struct:
1111 out_java_struct.write("""package org.ldk.structs;
1112 import java.util.LinkedList;
1115 LinkedList<Object> ptrs_to = new LinkedList();
1116 protected CommonBase(long ptr) { this.ptr = ptr; }
1117 public long _test_only_get_ptr() { return this.ptr; }
1121 in_block_comment = False
1122 cur_block_obj = None
1124 const_val_regex = re.compile("^extern const ([A-Za-z_0-9]*) ([A-Za-z_0-9]*);$")
1126 line_indicates_result_regex = re.compile("^ (LDKCResultPtr_[A-Za-z_0-9]*) contents;$")
1127 line_indicates_vec_regex = re.compile("^ ([A-Za-z_0-9]*) \*data;$")
1128 line_indicates_opaque_regex = re.compile("^ bool is_owned;$")
1129 line_indicates_trait_regex = re.compile("^ ([A-Za-z_0-9]* \*?)\(\*([A-Za-z_0-9]*)\)\((const )?void \*this_arg(.*)\);$")
1130 assert(line_indicates_trait_regex.match(" uintptr_t (*send_data)(void *this_arg, LDKu8slice data, bool resume_read);"))
1131 assert(line_indicates_trait_regex.match(" LDKCVec_MessageSendEventZ (*get_and_clear_pending_msg_events)(const void *this_arg);"))
1132 assert(line_indicates_trait_regex.match(" void *(*clone)(const void *this_arg);"))
1133 line_field_var_regex = re.compile("^ ([A-Za-z_0-9]*) ([A-Za-z_0-9]*);$")
1134 assert(line_field_var_regex.match(" LDKMessageSendEventsProvider MessageSendEventsProvider;"))
1135 struct_name_regex = re.compile("^typedef (struct|enum|union) (MUST_USE_STRUCT )?(LDK[A-Za-z_0-9]*) {$")
1136 assert(struct_name_regex.match("typedef struct LDKCVecTempl_u8 {"))
1137 assert(struct_name_regex.match("typedef enum LDKNetwork {"))
1138 struct_alias_regex = re.compile("^typedef (LDK[A-Za-z_0-9]*) (LDK[A-Za-z_0-9]*);$")
1139 assert(struct_alias_regex.match("typedef LDKCResultTempl_bool__PeerHandleError LDKCResult_boolPeerHandleErrorZ;"))
1141 result_templ_structs = set()
1142 union_enum_items = {}
1143 result_ptr_struct_items = {}
1145 if in_block_comment:
1146 if line.endswith("*/\n"):
1147 in_block_comment = False
1148 elif cur_block_obj is not None:
1149 cur_block_obj = cur_block_obj + line
1150 if line.startswith("} "):
1154 obj_lines = cur_block_obj.split("\n")
1156 result_contents = None
1157 is_unitary_enum = False
1158 is_union_enum = False
1162 field_var_lines = []
1164 for idx, struct_line in enumerate(obj_lines):
1165 if struct_line.strip().startswith("/*"):
1166 in_block_comment = True
1167 if in_block_comment:
1168 if struct_line.endswith("*/"):
1169 in_block_comment = False
1171 struct_name_match = struct_name_regex.match(struct_line)
1172 if struct_name_match is not None:
1173 struct_name = struct_name_match.group(3)
1174 if struct_name_match.group(1) == "enum":
1175 if not struct_name.endswith("_Tag"):
1176 is_unitary_enum = True
1178 is_union_enum = True
1179 elif struct_name_match.group(1) == "union":
1181 if line_indicates_opaque_regex.match(struct_line):
1183 result_match = line_indicates_result_regex.match(struct_line)
1184 if result_match is not None:
1185 result_contents = result_match.group(1)
1186 vec_ty_match = line_indicates_vec_regex.match(struct_line)
1187 if vec_ty_match is not None and struct_name.startswith("LDKCVecTempl_"):
1188 vec_ty = vec_ty_match.group(1)
1189 elif struct_name.startswith("LDKC2TupleTempl_") or struct_name.startswith("LDKC3TupleTempl_"):
1191 trait_fn_match = line_indicates_trait_regex.match(struct_line)
1192 if trait_fn_match is not None:
1193 trait_fn_lines.append(trait_fn_match)
1194 field_var_match = line_field_var_regex.match(struct_line)
1195 if field_var_match is not None:
1196 field_var_lines.append(field_var_match)
1197 field_lines.append(struct_line)
1199 assert(struct_name is not None)
1200 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))
1201 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))
1202 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))
1203 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))
1204 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))
1205 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))
1206 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))
1209 opaque_structs.add(struct_name)
1210 with open(sys.argv[3] + "/structs/" + struct_name.replace("LDK","") + ".java", "w") as out_java_struct:
1211 out_java_struct.write("package org.ldk.structs;\n\n")
1212 out_java_struct.write("import org.ldk.impl.bindings;\n")
1213 out_java_struct.write("import org.ldk.enums.*;\n\n")
1214 out_java_struct.write("public class " + struct_name.replace("LDK","") + " extends CommonBase")
1215 if struct_name.startswith("LDKLocked"):
1216 out_java_struct.write(" implements AutoCloseable")
1217 out_java_struct.write(" {\n")
1218 out_java_struct.write("\t" + struct_name.replace("LDK", "") + "(Object _dummy, long ptr) { super(ptr); }\n")
1219 if struct_name.startswith("LDKLocked"):
1220 out_java_struct.write("\t@Override public void close() {\n")
1222 out_java_struct.write("\t@Override @SuppressWarnings(\"deprecation\")\n")
1223 out_java_struct.write("\tprotected void finalize() throws Throwable {\n")
1224 out_java_struct.write("\t\tsuper.finalize();\n")
1225 out_java_struct.write("\t\tbindings." + struct_name.replace("LDK","") + "_free(ptr);\n")
1226 out_java_struct.write("\t}\n\n")
1227 elif result_contents is not None:
1228 result_templ_structs.add(struct_name)
1229 assert result_contents in result_ptr_struct_items
1230 elif struct_name.startswith("LDKCResultPtr_"):
1231 for line in field_lines:
1232 if line.endswith("*result;"):
1233 res_ty = line[:-8].strip()
1234 elif line.endswith("*err;"):
1235 err_ty = line[:-5].strip()
1236 result_ptr_struct_items[struct_name] = (res_ty, err_ty)
1238 out_java.write("\tpublic static native long " + struct_name + "_new(")
1239 out_c.write("JNIEXPORT jlong JNICALL Java_org_ldk_impl_bindings_" + struct_name.replace("_", "_1") + "_1new(JNIEnv *_env, jclass _b")
1240 for idx, line in enumerate(field_lines):
1241 if idx != 0 and idx < len(field_lines) - 2:
1242 ty_info = java_c_types(line.strip(';'), None)
1244 out_java.write(", ")
1245 e = chr(ord('a') + idx - 1)
1246 out_java.write(ty_info.java_ty + " " + e)
1247 out_c.write(", " + ty_info.c_ty + " " + e)
1248 out_java.write(");\n")
1249 out_c.write(") {\n")
1250 out_c.write("\t" + struct_name + "* ret = MALLOC(sizeof(" + struct_name + "), \"" + struct_name + "\");\n")
1251 for idx, line in enumerate(field_lines):
1252 if idx != 0 and idx < len(field_lines) - 2:
1253 ty_info = map_type(line.strip(';'), False, None, False)
1254 e = chr(ord('a') + idx - 1)
1255 if ty_info.arg_conv is not None:
1256 out_c.write("\t" + ty_info.arg_conv.replace("\n", "\n\t"))
1257 out_c.write("\n\tret->" + e + " = " + ty_info.arg_conv_name + ";\n")
1259 out_c.write("\tret->" + e + " = " + e + ";\n")
1260 assert ty_info.arg_conv_cleanup is None
1261 out_c.write("\treturn (long)ret;\n")
1263 elif vec_ty is not None:
1264 if vec_ty in opaque_structs:
1265 out_java.write("\tpublic static native long[] " + struct_name + "_arr_info(long vec_ptr);\n")
1266 out_c.write("JNIEXPORT jlongArray JNICALL Java_org_ldk_impl_bindings_" + struct_name.replace("_", "_1") + "_1arr_1info(JNIEnv *env, jclass _b, jlong ptr) {\n")
1268 out_java.write("\tpublic static native VecOrSliceDef " + struct_name + "_arr_info(long vec_ptr);\n")
1269 out_c.write("JNIEXPORT jobject JNICALL Java_org_ldk_impl_bindings_" + struct_name.replace("_", "_1") + "_1arr_1info(JNIEnv *env, jclass _b, jlong ptr) {\n")
1270 out_c.write("\t" + struct_name + " *vec = (" + struct_name + "*)ptr;\n")
1271 if vec_ty in opaque_structs:
1272 out_c.write("\tjlongArray ret = (*env)->NewLongArray(env, vec->datalen);\n")
1273 out_c.write("\tjlong *ret_elems = (*env)->GetPrimitiveArrayCritical(env, ret, NULL);\n")
1274 out_c.write("\tfor (size_t i = 0; i < vec->datalen; i++) {\n")
1275 out_c.write("\t\tCHECK((((long)vec->data[i].inner) & 1) == 0);\n")
1276 out_c.write("\t\tret_elems[i] = (long)vec->data[i].inner | (vec->data[i].is_owned ? 1 : 0);\n")
1277 out_c.write("\t}\n")
1278 out_c.write("\t(*env)->ReleasePrimitiveArrayCritical(env, ret, ret_elems, 0);\n")
1279 out_c.write("\treturn ret;\n")
1281 out_c.write("\treturn (*env)->NewObject(env, slicedef_cls, slicedef_meth, (long)vec->data, (long)vec->datalen, sizeof(" + vec_ty + "));\n")
1284 ty_info = map_type(vec_ty + " arr_elem", False, None, False)
1285 if len(ty_info.java_fn_ty_arg) == 1: # ie we're a primitive of some form
1286 out_java.write("\tpublic static native long " + struct_name + "_new(" + ty_info.java_ty + "[] elems);\n")
1287 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")
1288 out_c.write("\t" + struct_name + " *ret = MALLOC(sizeof(" + struct_name + "), \"" + struct_name + "\");\n")
1289 out_c.write("\tret->datalen = (*env)->GetArrayLength(env, elems);\n")
1290 out_c.write("\tif (ret->datalen == 0) {\n")
1291 out_c.write("\t\tret->data = NULL;\n")
1292 out_c.write("\t} else {\n")
1293 out_c.write("\t\tret->data = MALLOC(sizeof(" + vec_ty + ") * ret->datalen, \"" + struct_name + " Data\");\n")
1294 out_c.write("\t\t" + ty_info.c_ty + " *java_elems = (*env)->GetPrimitiveArrayCritical(env, elems, NULL);\n")
1295 out_c.write("\t\tfor (size_t i = 0; i < ret->datalen; i++) {\n")
1296 if ty_info.arg_conv is not None:
1297 out_c.write("\t\t\t" + ty_info.c_ty + " arr_elem = java_elems[i];\n")
1298 out_c.write("\t\t\t" + ty_info.arg_conv.replace("\n", "\n\t\t\t") + "\n")
1299 out_c.write("\t\t\tret->data[i] = " + ty_info.arg_conv_name + ";\n")
1300 assert ty_info.arg_conv_cleanup is None
1302 out_c.write("\t\t\tret->data[i] = java_elems[i];\n")
1303 out_c.write("\t\t}\n")
1304 out_c.write("\t\t(*env)->ReleasePrimitiveArrayCritical(env, elems, java_elems, 0);\n")
1305 out_c.write("\t}\n")
1306 out_c.write("\treturn (long)ret;\n")
1309 assert(struct_name.endswith("_Tag"))
1310 struct_name = struct_name[:-4]
1311 union_enum_items[struct_name] = {"field_lines": field_lines}
1312 elif struct_name.endswith("_Body") and struct_name.split("_")[0] in union_enum_items:
1313 enum_var_name = struct_name.split("_")
1314 union_enum_items[enum_var_name[0]][enum_var_name[1]] = field_lines
1315 elif struct_name in union_enum_items:
1316 map_complex_enum(struct_name, union_enum_items[struct_name])
1317 elif is_unitary_enum:
1318 map_unitary_enum(struct_name, field_lines)
1319 elif len(trait_fn_lines) > 0:
1320 trait_structs.add(struct_name)
1321 map_trait(struct_name, field_var_lines, trait_fn_lines)
1322 cur_block_obj = None
1324 fn_ptr = fn_ptr_regex.match(line)
1325 fn_ret_arr = fn_ret_arr_regex.match(line)
1326 reg_fn = reg_fn_regex.match(line)
1327 const_val = const_val_regex.match(line)
1329 if line.startswith("#include <"):
1331 elif line.startswith("/*"):
1332 #out_java.write("\t" + line)
1333 if not line.endswith("*/\n"):
1334 in_block_comment = True
1335 elif line.startswith("typedef enum "):
1336 cur_block_obj = line
1337 elif line.startswith("typedef struct "):
1338 cur_block_obj = line
1339 elif line.startswith("typedef union "):
1340 cur_block_obj = line
1341 elif line.startswith("typedef "):
1342 alias_match = struct_alias_regex.match(line)
1343 if alias_match.group(1) in result_templ_structs:
1344 out_java.write("\tpublic static native boolean " + alias_match.group(2) + "_result_ok(long arg);\n")
1345 out_java.write("\tpublic static native long " + alias_match.group(2) + "_get_inner(long arg);\n")
1346 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")
1347 out_c.write("\treturn ((" + alias_match.group(2) + "*)arg)->result_ok;\n")
1349 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")
1350 contents_ty = alias_match.group(1).replace("LDKCResultTempl", "LDKCResultPtr")
1351 res_ty, err_ty = result_ptr_struct_items[contents_ty]
1352 out_c.write("\t" + alias_match.group(2) + " *val = (" + alias_match.group(2) + "*)arg;\n")
1353 out_c.write("\tif (val->result_ok) {\n")
1354 if res_ty not in opaque_structs:
1355 out_c.write("\t\treturn (long)val->contents.result;\n")
1357 out_c.write("\t\treturn (long)(val->contents.result->inner) | (val->contents.result->is_owned ? 1 : 0);\n")
1358 out_c.write("\t} else {\n")
1359 if err_ty not in opaque_structs:
1360 out_c.write("\t\treturn (long)val->contents.err;\n")
1362 out_c.write("\t\treturn (long)(val->contents.err->inner) | (val->contents.err->is_owned ? 1 : 0);\n")
1363 out_c.write("\t}\n}\n")
1365 elif fn_ptr is not None:
1366 map_fn(line, fn_ptr, None, None)
1367 elif fn_ret_arr is not None:
1368 map_fn(line, fn_ret_arr, fn_ret_arr.group(4), None)
1369 elif reg_fn is not None:
1370 map_fn(line, reg_fn, None, None)
1371 elif const_val_regex is not None:
1372 # TODO Map const variables
1375 assert(line == "\n")
1377 out_java.write("}\n")
1378 for struct_name in opaque_structs:
1379 with open(sys.argv[3] + "/structs/" + struct_name.replace("LDK","") + ".java", "a") as out_java_struct:
1380 out_java_struct.write("}\n")
1381 for struct_name in trait_structs:
1382 with open(sys.argv[3] + "/structs/" + struct_name.replace("LDK","") + ".java", "a") as out_java_struct:
1383 out_java_struct.write("}\n")