5 print("USAGE: /path/to/lightning.h /path/to/bindings/output.java /path/to/bindings/enums/ /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):
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
21 def __init__(self, ty_info, arg_name, arg_conv, arg_conv_name, ret_conv, ret_conv_name):
22 assert(ty_info.c_ty is not None)
23 assert(ty_info.java_ty is not None)
24 assert(arg_name is not None)
25 self.c_ty = ty_info.c_ty
26 self.java_ty = ty_info.java_ty
27 self.java_fn_ty_arg = ty_info.java_fn_ty_arg
28 self.arg_name = arg_name
29 self.arg_conv = arg_conv
30 self.arg_conv_name = arg_conv_name
31 self.ret_conv = ret_conv
32 self.ret_conv_name = ret_conv_name
35 out_c.write(self.c_ty)
36 out_java.write(self.java_ty)
39 if self.arg_name != "":
40 out_java.write(" " + self.arg_name)
41 out_c.write(" " + self.arg_name)
43 out_java.write(" arg")
46 with open(sys.argv[1]) as in_h, open(sys.argv[2], "w") as out_java, open(sys.argv[4], "w") as out_c:
47 opaque_structs = set()
51 def camel_to_snake(s):
52 # Convert camel case to snake case, in a way that appears to match cbindgen
58 if lastchar.isupper():
59 if not char.isupper() and not lastund:
64 ret = ret + lastchar.lower()
67 if char.isupper() and not lastund:
75 return (ret + lastchar.lower()).strip("_")
77 var_is_arr_regex = re.compile("\(\*([A-za-z0-9_]*)\)\[([0-9]*)\]")
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 "):
91 if fn_arg.startswith("LDKThirtyTwoBytes"):
92 fn_arg = "uint8_t (*" + fn_arg[18:] + ")[32]"
93 assert var_is_arr_regex.match(fn_arg[8:])
94 rust_obj = "LDKThirtyTwoBytes"
96 if fn_arg.startswith("void"):
100 fn_arg = fn_arg[4:].strip()
101 elif fn_arg.startswith("bool"):
105 fn_arg = fn_arg[4:].strip()
106 elif fn_arg.startswith("uint8_t"):
110 fn_arg = fn_arg[7:].strip()
111 elif fn_arg.startswith("uint16_t"):
115 fn_arg = fn_arg[8:].strip()
116 elif fn_arg.startswith("uint32_t"):
120 fn_arg = fn_arg[8:].strip()
121 elif fn_arg.startswith("uint64_t") or fn_arg.startswith("uintptr_t"):
125 if fn_arg.startswith("uint64_t"):
126 fn_arg = fn_arg[8:].strip()
128 fn_arg = fn_arg[9:].strip()
129 elif is_const and fn_arg.startswith("char *"):
132 fn_ty_arg = "Ljava/lang/String;"
133 fn_arg = fn_arg[6:].strip()
135 ma = var_ty_regex.match(fn_arg)
136 if ma.group(1).strip() in unitary_enums:
137 java_ty = ma.group(1).strip()
139 fn_ty_arg = "Lorg/ldk/enums/" + ma.group(1).strip() + ";"
140 fn_arg = ma.group(2).strip()
141 rust_obj = ma.group(1).strip()
147 fn_arg = ma.group(2).strip()
148 rust_obj = ma.group(1).strip()
151 if fn_arg.startswith(" *") or fn_arg.startswith("*"):
152 fn_arg = fn_arg.replace("*", "").strip()
158 var_is_arr = var_is_arr_regex.match(fn_arg)
159 if var_is_arr is not None or ret_arr_len is not None:
160 assert(not take_by_ptr)
162 java_ty = java_ty + "[]"
163 c_ty = c_ty + "Array"
164 if var_is_arr is not None:
165 return TypeInfo(rust_obj=rust_obj, java_ty=java_ty, java_fn_ty_arg="[" + fn_ty_arg, c_ty=c_ty,
166 passed_as_ptr=False, is_ptr=False, var_name=var_is_arr.group(1), arr_len=var_is_arr.group(2))
167 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,
168 is_ptr=is_ptr, var_name=fn_arg, arr_len=None)
170 def map_type(fn_arg, print_void, ret_arr_len, is_free):
171 ty_info = java_c_types(fn_arg, ret_arr_len)
173 if ty_info.c_ty == "void":
175 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
176 arg_conv = None, arg_conv_name = None, ret_conv = None, ret_conv_name = None)
178 if ty_info.c_ty.endswith("Array"):
179 arr_len = ty_info.arr_len
180 if arr_len is not None:
181 arr_name = ty_info.var_name
184 arr_len = ret_arr_len
185 assert(ty_info.c_ty == "jbyteArray")
186 if ty_info.rust_obj is not None:
187 arg_conv = ty_info.rust_obj + " " + arr_name + "_ref;\n" + "(*_env)->GetByteArrayRegion (_env, """ + arr_name + ", 0, " + arr_len + ", " + arr_name + "_ref.data);"
188 arr_access = ("", ".data")
190 arg_conv = "unsigned char " + arr_name + "_arr[" + arr_len + "];\n" + "(*_env)->GetByteArrayRegion (_env, """ + arr_name + ", 0, " + arr_len + ", " + arr_name + "_arr);\n" + "unsigned char (*""" + arr_name + "_ref)[" + arr_len + "] = &" + arr_name + "_arr;"
191 arr_access = ("*", "")
192 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
194 arg_conv_name = arr_name + "_ref",
195 ret_conv = ("jbyteArray " + arr_name + "_arr = (*_env)->NewByteArray(_env, " + arr_len + ");\n" +
196 "(*_env)->SetByteArrayRegion(_env, " + arr_name + "_arr, 0, " + arr_len + ", " + arr_access[0],
197 arr_access[1] + ");"),
198 ret_conv_name = arr_name + "_arr")
199 elif ty_info.var_name != "":
200 # If we have a parameter name, print it (noting that it may indicate its a pointer)
201 if ty_info.rust_obj is not None:
202 assert(ty_info.passed_as_ptr)
203 if not ty_info.is_ptr:
204 if ty_info.rust_obj in unitary_enums:
205 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
206 arg_conv = ty_info.rust_obj + " " + ty_info.var_name + "_conv = " + ty_info.rust_obj + "_from_java(_env, " + ty_info.var_name + ");",
207 arg_conv_name = ty_info.var_name + "_conv",
208 ret_conv = ("jclass " + ty_info.var_name + "_conv = " + ty_info.rust_obj + "_to_java(_env, ", ");"),
209 ret_conv_name = ty_info.var_name + "_conv")
210 base_conv = ty_info.rust_obj + " " + ty_info.var_name + "_conv = *(" + ty_info.rust_obj + "*)" + ty_info.var_name + ";";
211 if ty_info.rust_obj in trait_structs:
213 base_conv = base_conv + "\nif (" + ty_info.var_name + "_conv.free == " + ty_info.rust_obj + "_JCalls_free) {\n"
214 base_conv = base_conv + "\t// If this_arg is a JCalls struct, then we need to increment the refcnt in it.\n"
215 base_conv = base_conv + "\t" + ty_info.rust_obj + "_JCalls_clone(" + ty_info.var_name + "_conv.this_arg);\n}"
217 base_conv = base_conv + "\n" + "FREE((void*)" + ty_info.var_name + ");"
218 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
219 arg_conv = base_conv,
220 arg_conv_name = ty_info.var_name + "_conv",
221 ret_conv = ("CANT PASS TRAIT TO Java?", ""), ret_conv_name = "NO CONV POSSIBLE")
222 if ty_info.rust_obj != "LDKu8slice":
223 # Don't bother free'ing slices passed in - we often pass them Rust -> Rust
224 base_conv = base_conv + "\nFREE((void*)" + ty_info.var_name + ");";
225 if ty_info.rust_obj in opaque_structs:
226 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
227 arg_conv = base_conv + "\n" + ty_info.var_name + "_conv.is_owned = true;",
228 arg_conv_name = ty_info.var_name + "_conv",
229 ret_conv = ("long " + ty_info.var_name + "_ref = (long)&", ";"), ret_conv_name = ty_info.var_name + "_ref")
231 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
232 arg_conv = base_conv, arg_conv_name = ty_info.var_name + "_conv",
233 ret_conv = ("long " + ty_info.var_name + "_ref = (long)&", ";"), ret_conv_name = ty_info.var_name + "_ref")
236 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
237 arg_conv = ty_info.rust_obj + "* " + ty_info.var_name + "_conv = (" + ty_info.rust_obj + "*)" + ty_info.var_name + ";",
238 arg_conv_name = ty_info.var_name + "_conv",
239 ret_conv = None, ret_conv_name = None) # its a pointer, no conv needed
241 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
242 arg_conv = None, arg_conv_name = ty_info.var_name, ret_conv = None, ret_conv_name = None)
243 elif ty_info.java_ty == "String":
244 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
245 arg_conv = None, arg_conv_name = None,
246 ret_conv = ("jstring " + ty_info.var_name + "_conv = (*_env)->NewStringUTF(_env, ", ");"), ret_conv_name = ty_info.var_name + "_conv")
248 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
249 arg_conv = None, arg_conv_name = ty_info.var_name, ret_conv = None, ret_conv_name = None)
251 # We don't have a parameter name, and want one, just call it arg
252 if ty_info.rust_obj is not None:
253 assert(not is_free or ty_info.rust_obj not in opaque_structs);
254 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
255 arg_conv = ty_info.rust_obj + " arg_conv = *(" + ty_info.rust_obj + "*)arg;\nFREE((void*)arg);",
256 arg_conv_name = "arg_conv",
257 ret_conv = None, ret_conv_name = None)
260 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
261 arg_conv = None, arg_conv_name = "arg", ret_conv = None, ret_conv_name = None)
263 # We don't have a parameter name, and don't want one (cause we're returning)
264 if ty_info.rust_obj is not None:
265 if not ty_info.is_ptr:
266 if ty_info.rust_obj in unitary_enums:
267 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
268 arg_conv = ty_info.rust_obj + " ret = " + ty_info.rust_obj + "_from_java(_env, " + ty_info.var_name + ");",
269 arg_conv_name = "ret",
270 ret_conv = ("jclass ret = " + ty_info.rust_obj + "_to_java(_env, ", ");"), ret_conv_name = "ret")
271 if ty_info.rust_obj in opaque_structs:
272 # If we're returning a newly-allocated struct, we don't want Rust to ever
273 # free, instead relying on the Java GC to lose the ref. We undo this in
274 # any _free function.
275 # To avoid any issues, we first assert that the incoming object is non-ref.
276 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
277 ret_conv = (ty_info.rust_obj + "* ret = MALLOC(sizeof(" + ty_info.rust_obj + "), \"" + ty_info.rust_obj + "\");\n*ret = ", ";\nDO_ASSERT(ret->is_owned);\nret->is_owned = false;"),
278 ret_conv_name = "(long)ret",
279 arg_conv = None, arg_conv_name = None)
281 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
282 ret_conv = (ty_info.rust_obj + "* ret = MALLOC(sizeof(" + ty_info.rust_obj + "), \"" + ty_info.rust_obj + "\");\n*ret = ", ";"),
283 ret_conv_name = "(long)ret",
284 arg_conv = None, arg_conv_name = None)
286 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
287 ret_conv = ("long ret = (long)", ";"), ret_conv_name = "ret",
288 arg_conv = None, arg_conv_name = None)
290 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
291 arg_conv = None, arg_conv_name = None, ret_conv = None, ret_conv_name = None)
293 def map_fn(line, re_match, ret_arr_len, c_call_string):
294 out_java.write("\t// " + line)
295 out_java.write("\tpublic static native ")
296 out_c.write("JNIEXPORT ")
298 ret_info = map_type(re_match.group(1), True, ret_arr_len, False)
300 if ret_info.ret_conv is not None:
301 ret_conv_pfx, ret_conv_sfx = ret_info.ret_conv
303 out_java.write(" " + re_match.group(2) + "(")
304 out_c.write(" JNICALL Java_org_ldk_impl_bindings_" + re_match.group(2).replace('_', '_1') + "(JNIEnv * _env, jclass _b")
307 for idx, arg in enumerate(re_match.group(3).split(',')):
312 arg_conv_info = map_type(arg, False, None, re_match.group(2).endswith("_free"))
313 if arg_conv_info.c_ty != "void":
314 arg_conv_info.print_ty()
315 arg_conv_info.print_name()
316 arg_names.append(arg_conv_info)
318 out_java.write(");\n")
321 for info in arg_names:
322 if info.arg_conv is not None:
323 out_c.write("\t" + info.arg_conv.replace('\n', "\n\t") + "\n");
325 if ret_info.ret_conv is not None:
326 out_c.write("\t" + ret_conv_pfx.replace('\n', '\n\t'));
328 out_c.write("\treturn ");
330 if c_call_string is None:
331 out_c.write(re_match.group(2) + "(")
333 out_c.write(c_call_string)
334 for idx, info in enumerate(arg_names):
335 if info.arg_conv_name is not None:
338 elif c_call_string is not None:
340 out_c.write(info.arg_conv_name)
342 if ret_info.ret_conv is not None:
343 out_c.write(ret_conv_sfx.replace('\n', '\n\t'))
344 out_c.write("\n\treturn " + ret_info.ret_conv_name + ";")
347 out_c.write("\n}\n\n")
349 def map_trait(struct_name, field_var_lines, trait_fn_lines):
350 out_c.write("typedef struct " + struct_name + "_JCalls {\n")
351 out_c.write("\tatomic_size_t refcnt;\n")
352 out_c.write("\tJavaVM *vm;\n")
353 out_c.write("\tjobject o;\n")
354 for var_line in field_var_lines:
355 if var_line.group(1) in trait_structs:
356 out_c.write("\t" + var_line.group(1) + "_JCalls* " + var_line.group(2) + ";\n")
357 for fn_line in trait_fn_lines:
358 if fn_line.group(2) != "free" and fn_line.group(2) != "clone":
359 out_c.write("\tjmethodID " + fn_line.group(2) + "_meth;\n")
360 out_c.write("} " + struct_name + "_JCalls;\n")
362 out_java.write("\tpublic interface " + struct_name + " {\n")
364 for fn_line in trait_fn_lines:
365 java_meth_descr = "("
366 if fn_line.group(2) != "free" and fn_line.group(2) != "clone":
367 ret_ty_info = java_c_types(fn_line.group(1), None)
369 out_java.write("\t\t " + ret_ty_info.java_ty + " " + fn_line.group(2) + "(")
370 is_const = fn_line.group(3) is not None
371 out_c.write(fn_line.group(1) + fn_line.group(2) + "_jcall(")
373 out_c.write("const void* this_arg")
375 out_c.write("void* this_arg")
378 for idx, arg in enumerate(fn_line.group(4).split(',')):
384 arg_conv_info = map_type(arg, True, None, False)
385 out_c.write(arg.strip())
386 out_java.write(arg_conv_info.java_ty + " " + arg_conv_info.arg_name)
387 arg_names.append(arg_conv_info)
388 java_meth_descr = java_meth_descr + arg_conv_info.java_fn_ty_arg
389 java_meth_descr = java_meth_descr + ")" + ret_ty_info.java_fn_ty_arg
390 java_meths.append(java_meth_descr)
392 out_java.write(");\n")
394 out_c.write("\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n")
395 out_c.write("\tJNIEnv *env;\n")
396 out_c.write("\tDO_ASSERT((*j_calls->vm)->GetEnv(j_calls->vm, (void**)&env, JNI_VERSION_1_8) == JNI_OK);\n")
398 for arg_info in arg_names:
399 if arg_info.ret_conv is not None:
400 out_c.write("\t" + arg_info.ret_conv[0].replace('\n', '\n\t').replace("_env", "env"));
401 out_c.write(arg_info.arg_name)
402 out_c.write(arg_info.ret_conv[1].replace('\n', '\n\t').replace("_env", "env") + "\n")
404 if ret_ty_info.c_ty.endswith("Array"):
405 assert(ret_ty_info.c_ty == "jbyteArray")
406 out_c.write("\tjbyteArray jret = (*env)->CallObjectMethod(env, j_calls->o, j_calls->" + fn_line.group(2) + "_meth")
407 elif not ret_ty_info.passed_as_ptr:
408 out_c.write("\treturn (*env)->Call" + ret_ty_info.java_ty.title() + "Method(env, j_calls->o, j_calls->" + fn_line.group(2) + "_meth")
410 out_c.write("\t" + fn_line.group(1).strip() + "* ret = (" + fn_line.group(1).strip() + "*)(*env)->CallLongMethod(env, j_calls->o, j_calls->" + fn_line.group(2) + "_meth");
412 for arg_info in arg_names:
413 if arg_info.ret_conv is not None:
414 out_c.write(", " + arg_info.ret_conv_name)
416 out_c.write(", " + arg_info.arg_name)
418 if ret_ty_info.c_ty.endswith("Array"):
419 out_c.write("\tLDKThirtyTwoBytes ret;\n")
420 out_c.write("\t(*env)->GetByteArrayRegion(env, jret, 0, " + ret_ty_info.arr_len + ", ret.data);\n")
421 out_c.write("\treturn ret;\n")
423 if ret_ty_info.passed_as_ptr:
424 out_c.write("\t" + fn_line.group(1).strip() + " res = *ret;\n")
425 out_c.write("\tFREE(ret);\n")
426 out_c.write("\treturn res;\n")
428 elif fn_line.group(2) == "free":
429 out_c.write("static void " + struct_name + "_JCalls_free(void* this_arg) {\n")
430 out_c.write("\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n")
431 out_c.write("\tif (atomic_fetch_sub_explicit(&j_calls->refcnt, 1, memory_order_acquire) == 1) {\n")
432 out_c.write("\t\tJNIEnv *env;\n")
433 out_c.write("\t\tDO_ASSERT((*j_calls->vm)->GetEnv(j_calls->vm, (void**)&env, JNI_VERSION_1_8) == JNI_OK);\n")
434 out_c.write("\t\t(*env)->DeleteGlobalRef(env, j_calls->o);\n")
435 out_c.write("\t\tFREE(j_calls);\n")
436 out_c.write("\t}\n}\n")
438 # Write out a clone function whether we need one or not, as we use them in moving to rust
439 out_c.write("static void* " + struct_name + "_JCalls_clone(const void* this_arg) {\n")
440 out_c.write("\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n")
441 out_c.write("\tatomic_fetch_add_explicit(&j_calls->refcnt, 1, memory_order_release);\n")
442 for var_line in field_var_lines:
443 if var_line.group(1) in trait_structs:
444 out_c.write("\tatomic_fetch_add_explicit(&j_calls->" + var_line.group(2) + "->refcnt, 1, memory_order_release);\n")
445 out_c.write("\treturn (void*) this_arg;\n")
448 out_java.write("\t}\n")
450 out_java.write("\tpublic static native long " + struct_name + "_new(" + struct_name + " impl")
451 out_c.write("static inline " + struct_name + " " + struct_name + "_init (JNIEnv * env, jclass _a, jobject o")
452 for var_line in field_var_lines:
453 if var_line.group(1) in trait_structs:
454 out_java.write(", " + var_line.group(1) + " " + var_line.group(2))
455 out_c.write(", jobject " + var_line.group(2))
456 out_java.write(");\n")
459 out_c.write("\tjclass c = (*env)->GetObjectClass(env, o);\n")
460 out_c.write("\tDO_ASSERT(c != NULL);\n")
461 out_c.write("\t" + struct_name + "_JCalls *calls = MALLOC(sizeof(" + struct_name + "_JCalls), \"" + struct_name + "_JCalls\");\n")
462 out_c.write("\tatomic_init(&calls->refcnt, 1);\n")
463 out_c.write("\tDO_ASSERT((*env)->GetJavaVM(env, &calls->vm) == 0);\n")
464 out_c.write("\tcalls->o = (*env)->NewGlobalRef(env, o);\n")
465 for (fn_line, java_meth_descr) in zip(trait_fn_lines, java_meths):
466 if fn_line.group(2) != "free" and fn_line.group(2) != "clone":
467 out_c.write("\tcalls->" + fn_line.group(2) + "_meth = (*env)->GetMethodID(env, c, \"" + fn_line.group(2) + "\", \"" + java_meth_descr + "\");\n")
468 out_c.write("\tDO_ASSERT(calls->" + fn_line.group(2) + "_meth != NULL);\n")
469 out_c.write("\n\t" + struct_name + " ret = {\n")
470 out_c.write("\t\t.this_arg = (void*) calls,\n")
471 for fn_line in trait_fn_lines:
472 if fn_line.group(2) != "free" and fn_line.group(2) != "clone":
473 out_c.write("\t\t." + fn_line.group(2) + " = " + fn_line.group(2) + "_jcall,\n")
474 elif fn_line.group(2) == "free":
475 out_c.write("\t\t.free = " + struct_name + "_JCalls_free,\n")
477 out_c.write("\t\t.clone = " + struct_name + "_JCalls_clone,\n")
478 for var_line in field_var_lines:
479 if var_line.group(1) in trait_structs:
480 out_c.write("\t\t." + var_line.group(2) + " = " + var_line.group(1) + "_init(env, _a, " + var_line.group(2) + "),\n")
481 out_c.write("\t};\n")
482 for var_line in field_var_lines:
483 if var_line.group(1) in trait_structs:
484 out_c.write("\tcalls->" + var_line.group(2) + " = ret." + var_line.group(2) + ".this_arg;\n")
485 out_c.write("\treturn ret;\n")
488 out_c.write("JNIEXPORT long JNICALL Java_org_ldk_impl_bindings_" + struct_name.replace("_", "_1") + "_1new (JNIEnv * env, jclass _a, jobject o")
489 for var_line in field_var_lines:
490 if var_line.group(1) in trait_structs:
491 out_c.write(", jobject " + var_line.group(2))
493 out_c.write("\t" + struct_name + " *res_ptr = MALLOC(sizeof(" + struct_name + "), \"" + struct_name + "\");\n")
494 out_c.write("\t*res_ptr = " + struct_name + "_init(env, _a, o")
495 for var_line in field_var_lines:
496 if var_line.group(1) in trait_structs:
497 out_c.write(", " + var_line.group(2))
499 out_c.write("\treturn (long)res_ptr;\n")
502 out_java.write("\tpublic static native " + struct_name + " " + struct_name + "_get_obj_from_jcalls(long val);\n")
503 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")
504 out_c.write("\treturn ((" + struct_name + "_JCalls*)val)->o;\n")
507 for fn_line in trait_fn_lines:
508 # For now, just disable enabling the _call_log - we don't know how to inverse-map String
509 is_log = fn_line.group(2) == "log" and struct_name == "LDKLogger"
510 if fn_line.group(2) != "free" and fn_line.group(2) != "clone" and fn_line.group(2) != "eq" and not is_log:
511 dummy_line = fn_line.group(1) + struct_name + "_call_" + fn_line.group(2) + " " + struct_name + "* arg" + fn_line.group(4) + "\n"
512 map_fn(dummy_line, re.compile("([A-Za-z_0-9]*) *([A-Za-z_0-9]*) *(.*)").match(dummy_line), None, "(arg_conv->" + fn_line.group(2) + ")(arg_conv->this_arg")
514 out_c.write("""#include \"org_ldk_impl_bindings.h\"
515 #include <rust_types.h>
516 #include <lightning.h>
518 #include <stdatomic.h>
521 if sys.argv[4] == "false":
522 out_c.write("#define MALLOC(a, _) malloc(a)\n")
523 out_c.write("#define FREE free\n")
524 out_c.write("#define DO_ASSERT(a) (void)(a)\n")
526 out_c.write("""#include <assert.h>
527 #define DO_ASSERT(a) do { bool _assert_val = (a); assert(_assert_val); } while(0)
530 static mtx_t allocation_mtx;
532 void __attribute__((constructor)) init_mtx() {
533 DO_ASSERT(mtx_init(&allocation_mtx, mtx_plain) == thrd_success);
536 typedef struct allocation {
537 struct allocation* next;
539 const char* struct_name;
541 static allocation* allocation_ll = NULL;
543 static void* MALLOC(size_t len, const char* struct_name) {
544 void* res = malloc(len);
545 allocation* new_alloc = malloc(sizeof(allocation));
546 new_alloc->ptr = res;
547 new_alloc->struct_name = struct_name;
548 DO_ASSERT(mtx_lock(&allocation_mtx) == thrd_success);
549 new_alloc->next = allocation_ll;
550 allocation_ll = new_alloc;
551 DO_ASSERT(mtx_unlock(&allocation_mtx) == thrd_success);
555 static void FREE(void* ptr) {
556 allocation* p = NULL;
557 DO_ASSERT(mtx_lock(&allocation_mtx) == thrd_success);
558 allocation* it = allocation_ll;
559 while (it->ptr != ptr) { p = it; it = it->next; }
560 if (p) { p->next = it->next; } else { allocation_ll = it->next; }
561 DO_ASSERT(mtx_unlock(&allocation_mtx) == thrd_success);
562 DO_ASSERT(it->ptr == ptr);
567 void __attribute__((destructor)) check_leaks() {
568 for (allocation* a = allocation_ll; a != NULL; a = a->next) { fprintf(stderr, "%s %p remains\\n", a->struct_name, a->ptr); }
569 DO_ASSERT(allocation_ll == NULL);
572 out_java.write("""package org.ldk.impl;
573 import org.ldk.enums.*;
575 public class bindings {
576 public static class VecOrSliceDef {
580 public VecOrSliceDef(long dataptr, long datalen, long stride) {
581 this.dataptr = dataptr; this.datalen = datalen; this.stride = stride;
585 System.loadLibrary(\"lightningjni\");
586 init(java.lang.Enum.class, VecOrSliceDef.class);
588 static native void init(java.lang.Class c, java.lang.Class slicedef);
590 public static native boolean deref_bool(long ptr);
591 public static native long deref_long(long ptr);
592 public static native void free_heap_ptr(long ptr);
593 public static native byte[] read_bytes(long ptr, long len);
594 public static native byte[] get_u8_slice_bytes(long slice_ptr);
595 public static native long bytes_to_u8_vec(byte[] bytes);
596 public static native long vec_slice_len(long vec);
597 public static native long new_empty_slice_vec();
601 static jmethodID ordinal_meth = NULL;
602 static jmethodID slicedef_meth = NULL;
603 static jclass slicedef_cls = NULL;
604 JNIEXPORT void Java_org_ldk_impl_bindings_init(JNIEnv * env, jclass _b, jclass enum_class, jclass slicedef_class) {
605 ordinal_meth = (*env)->GetMethodID(env, enum_class, "ordinal", "()I");
606 DO_ASSERT(ordinal_meth != NULL);
607 slicedef_meth = (*env)->GetMethodID(env, slicedef_class, "<init>", "(JJJ)V");
608 DO_ASSERT(slicedef_meth != NULL);
609 slicedef_cls = (*env)->NewGlobalRef(env, slicedef_class);
610 DO_ASSERT(slicedef_cls != NULL);
613 JNIEXPORT jboolean JNICALL Java_org_ldk_impl_bindings_deref_1bool (JNIEnv * env, jclass _a, jlong ptr) {
614 return *((bool*)ptr);
616 JNIEXPORT jlong JNICALL Java_org_ldk_impl_bindings_deref_1long (JNIEnv * env, jclass _a, jlong ptr) {
617 return *((long*)ptr);
619 JNIEXPORT void JNICALL Java_org_ldk_impl_bindings_free_1heap_1ptr (JNIEnv * env, jclass _a, jlong ptr) {
622 JNIEXPORT jbyteArray JNICALL Java_org_ldk_impl_bindings_read_1bytes (JNIEnv * _env, jclass _b, jlong ptr, jlong len) {
623 jbyteArray ret_arr = (*_env)->NewByteArray(_env, len);
624 (*_env)->SetByteArrayRegion(_env, ret_arr, 0, len, (unsigned char*)ptr);
627 JNIEXPORT jbyteArray JNICALL Java_org_ldk_impl_bindings_get_1u8_1slice_1bytes (JNIEnv * _env, jclass _b, jlong slice_ptr) {
628 LDKu8slice *slice = (LDKu8slice*)slice_ptr;
629 jbyteArray ret_arr = (*_env)->NewByteArray(_env, slice->datalen);
630 (*_env)->SetByteArrayRegion(_env, ret_arr, 0, slice->datalen, slice->data);
633 JNIEXPORT long JNICALL Java_org_ldk_impl_bindings_bytes_1to_1u8_1vec (JNIEnv * _env, jclass _b, jbyteArray bytes) {
634 LDKCVec_u8Z *vec = (LDKCVec_u8Z*)MALLOC(sizeof(LDKCVec_u8Z), "LDKCVec_u8");
635 vec->datalen = (*_env)->GetArrayLength(_env, bytes);
636 vec->data = (uint8_t*)malloc(vec->datalen); // May be freed by rust, so don't track allocation
637 (*_env)->GetByteArrayRegion (_env, bytes, 0, vec->datalen, vec->data);
640 JNIEXPORT jlong JNICALL Java_org_ldk_impl_bindings_vec_1slice_1len (JNIEnv * env, jclass _a, jlong ptr) {
641 // Check offsets of a few Vec types are all consistent as we're meant to be generic across types
642 _Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKCVec_SignatureZ, datalen), "Vec<*> needs to be mapped identically");
643 _Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKCVec_MessageSendEventZ, datalen), "Vec<*> needs to be mapped identically");
644 _Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKCVec_EventZ, datalen), "Vec<*> needs to be mapped identically");
645 _Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKCVec_C2Tuple_usizeTransactionZZ, datalen), "Vec<*> needs to be mapped identically");
646 LDKCVec_u8Z *vec = (LDKCVec_u8Z*)ptr;
647 return (long)vec->datalen;
649 JNIEXPORT long JNICALL Java_org_ldk_impl_bindings_new_1empty_1slice_1vec (JNIEnv * _env, jclass _b) {
650 // Check sizes of a few Vec types are all consistent as we're meant to be generic across types
651 _Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKCVec_SignatureZ), "Vec<*> needs to be mapped identically");
652 _Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKCVec_MessageSendEventZ), "Vec<*> needs to be mapped identically");
653 _Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKCVec_EventZ), "Vec<*> needs to be mapped identically");
654 _Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKCVec_C2Tuple_usizeTransactionZZ), "Vec<*> needs to be mapped identically");
655 LDKCVec_u8Z *vec = (LDKCVec_u8Z*)MALLOC(sizeof(LDKCVec_u8Z), "Empty LDKCVec");
661 // We assume that CVec_u8Z and u8slice are the same size and layout (and thus pointers to the two can be mixed)
662 _Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKu8slice), "Vec<u8> and [u8] need to have been mapped identically");
663 _Static_assert(offsetof(LDKCVec_u8Z, data) == offsetof(LDKu8slice, data), "Vec<u8> and [u8] need to have been mapped identically");
664 _Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKu8slice, datalen), "Vec<u8> and [u8] need to have been mapped identically");
668 # XXX: Temporarily write out a manual SecretKey_new() for testing, we should auto-gen this kind of thing
669 out_java.write("\tpublic static native long LDKSecretKey_new();\n\n") # TODO: rm me
670 out_c.write("JNIEXPORT jlong JNICALL Java_org_ldk_impl_bindings_LDKSecretKey_1new(JNIEnv * _env, jclass _b) {\n") # TODO: rm me
671 out_c.write("\tLDKSecretKey* key = (LDKSecretKey*)MALLOC(sizeof(LDKSecretKey), \"LDKSecretKey\");\n") # TODO: rm me
672 out_c.write("\treturn (long)key;\n") # TODO: rm me
673 out_c.write("}\n") # TODO: rm me
675 in_block_comment = False
678 fn_ptr_regex = re.compile("^extern const ([A-Za-z_0-9\* ]*) \(\*(.*)\)\((.*)\);$")
679 fn_ret_arr_regex = re.compile("(.*) \(\*(.*)\((.*)\)\)\[([0-9]*)\];$")
680 reg_fn_regex = re.compile("([A-Za-z_0-9\* ]* \*?)([a-zA-Z_0-9]*)\((.*)\);$")
681 const_val_regex = re.compile("^extern const ([A-Za-z_0-9]*) ([A-Za-z_0-9]*);$")
683 line_indicates_result_regex = re.compile("^ bool result_ok;$")
684 line_indicates_vec_regex = re.compile("^ ([A-Za-z_0-9]*) \*data;$")
685 line_indicates_opaque_regex = re.compile("^ bool is_owned;$")
686 line_indicates_trait_regex = re.compile("^ ([A-Za-z_0-9]* \*?)\(\*([A-Za-z_0-9]*)\)\((const )?void \*this_arg(.*)\);$")
687 assert(line_indicates_trait_regex.match(" uintptr_t (*send_data)(void *this_arg, LDKu8slice data, bool resume_read);"))
688 assert(line_indicates_trait_regex.match(" LDKCVec_MessageSendEventZ (*get_and_clear_pending_msg_events)(const void *this_arg);"))
689 assert(line_indicates_trait_regex.match(" void *(*clone)(const void *this_arg);"))
690 line_field_var_regex = re.compile("^ ([A-Za-z_0-9]*) ([A-Za-z_0-9]*);$")
691 assert(line_field_var_regex.match(" LDKMessageSendEventsProvider MessageSendEventsProvider;"))
692 struct_name_regex = re.compile("^typedef (struct|enum|union) (MUST_USE_STRUCT )?(LDK[A-Za-z_0-9]*) {$")
693 assert(struct_name_regex.match("typedef struct LDKCVecTempl_u8 {"))
694 assert(struct_name_regex.match("typedef enum LDKNetwork {"))
695 struct_alias_regex = re.compile("^typedef (LDK[A-Za-z_0-9]*) (LDK[A-Za-z_0-9]*);$")
696 assert(struct_alias_regex.match("typedef LDKCResultTempl_bool__PeerHandleError LDKCResult_boolPeerHandleErrorZ;"))
698 result_templ_structs = set()
699 union_enum_items = {}
702 #out_java.write("\t" + line)
703 if line.endswith("*/\n"):
704 in_block_comment = False
705 elif cur_block_obj is not None:
706 cur_block_obj = cur_block_obj + line
707 if line.startswith("} "):
711 obj_lines = cur_block_obj.split("\n")
714 is_unitary_enum = False
715 is_union_enum = False
720 for idx, struct_line in enumerate(obj_lines):
721 if struct_line.strip().startswith("/*"):
722 in_block_comment = True
724 if struct_line.endswith("*/"):
725 in_block_comment = False
727 struct_name_match = struct_name_regex.match(struct_line)
728 vec_ty_match = line_indicates_vec_regex.match(struct_line)
729 if struct_name_match is not None:
730 struct_name = struct_name_match.group(3)
731 if struct_name_match.group(1) == "enum":
732 if not struct_name.endswith("_Tag"):
733 is_unitary_enum = True
736 elif struct_name_match.group(1) == "union":
738 if line_indicates_opaque_regex.match(struct_line):
740 elif line_indicates_result_regex.match(struct_line):
742 elif vec_ty_match is not None and struct_name.startswith("LDKCVecTempl_"):
743 vec_ty = vec_ty_match.group(1)
744 trait_fn_match = line_indicates_trait_regex.match(struct_line)
745 if trait_fn_match is not None:
746 trait_fn_lines.append(trait_fn_match)
747 field_var_match = line_field_var_regex.match(struct_line)
748 if field_var_match is not None:
749 field_var_lines.append(field_var_match)
750 field_lines.append(struct_line)
752 assert(struct_name is not None)
753 assert(len(trait_fn_lines) == 0 or not (is_opaque or is_unitary_enum or is_union_enum or is_union or is_result or vec_ty is not None))
754 assert(not is_opaque or not (len(trait_fn_lines) != 0 or is_unitary_enum or is_union_enum or is_union or is_result or vec_ty is not None))
755 assert(not is_unitary_enum or not (len(trait_fn_lines) != 0 or is_opaque or is_union_enum or is_union or is_result or vec_ty is not None))
756 assert(not is_union_enum or not (len(trait_fn_lines) != 0 or is_unitary_enum or is_opaque or is_union or is_result or vec_ty is not None))
757 assert(not is_union or not (len(trait_fn_lines) != 0 or is_unitary_enum or is_union_enum or is_opaque or is_result or vec_ty is not None))
758 assert(not is_result 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))
759 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 is_result))
762 opaque_structs.add(struct_name)
763 out_java.write("\tpublic static native long " + struct_name + "_optional_none();\n")
764 out_c.write("JNIEXPORT jlong JNICALL Java_org_ldk_impl_bindings_" + struct_name.replace("_", "_1") + "_1optional_1none (JNIEnv * env, jclass _a) {\n")
765 out_c.write("\t" + struct_name + " *ret = MALLOC(sizeof(" + struct_name + "), \"" + struct_name + "\");\n")
766 out_c.write("\tret->inner = NULL;\n")
767 out_c.write("\treturn (long)ret;\n")
770 result_templ_structs.add(struct_name)
771 elif vec_ty is not None:
772 out_java.write("\tpublic static native VecOrSliceDef " + struct_name + "_arr_info(long vec_ptr);\n")
773 out_c.write("JNIEXPORT jobject JNICALL Java_org_ldk_impl_bindings_" + struct_name.replace("_", "_1") + "_1arr_1info(JNIEnv *env, jclass _b, jlong ptr) {\n")
774 out_c.write("\t" + struct_name + " *vec = (" + struct_name + "*)ptr;\n")
775 out_c.write("\treturn (*env)->NewObject(env, slicedef_cls, slicedef_meth, (long)vec->data, (long)vec->datalen, sizeof(" + vec_ty + "));\n")
778 assert(struct_name.endswith("_Tag"))
779 struct_name = struct_name[:-4]
780 union_enum_items[struct_name] = {"field_lines": field_lines}
781 elif struct_name.endswith("_Body") and struct_name.split("_")[0] in union_enum_items:
782 enum_var_name = struct_name.split("_")
783 union_enum_items[enum_var_name[0]][enum_var_name[1]] = field_lines
784 elif struct_name in union_enum_items:
785 tag_field_lines = union_enum_items[struct_name]["field_lines"]
786 init_meth_jty_strs = {}
787 for idx, struct_line in enumerate(tag_field_lines):
789 out_java.write("\tpublic static class " + struct_name + " {\n")
790 out_java.write("\t\tprivate " + struct_name + "() {}\n")
791 elif idx == len(tag_field_lines) - 3:
792 assert(struct_line.endswith("_Sentinel,"))
793 elif idx == len(tag_field_lines) - 2:
794 out_java.write("\t\tstatic native void init();\n")
795 out_java.write("\t}\n")
796 elif idx == len(tag_field_lines) - 1:
797 assert(struct_line == "")
799 var_name = struct_line.strip(' ,')[len(struct_name) + 1:]
800 out_java.write("\t\tpublic final static class " + var_name + " extends " + struct_name + " {\n")
801 out_c.write("static jclass " + struct_name + "_" + var_name + "_class = NULL;\n")
802 out_c.write("static jmethodID " + struct_name + "_" + var_name + "_meth = NULL;\n")
803 init_meth_jty_str = ""
804 init_meth_params = ""
806 if "LDK" + var_name in union_enum_items[struct_name]:
807 enum_var_lines = union_enum_items[struct_name]["LDK" + var_name]
808 for idx, field in enumerate(enum_var_lines):
809 if idx != 0 and idx < len(enum_var_lines) - 2:
810 field_ty = java_c_types(field.strip(' ;'), None)
811 out_java.write("\t\t\tpublic " + field_ty.java_ty + " " + field_ty.var_name + ";\n")
812 init_meth_jty_str = init_meth_jty_str + field_ty.java_fn_ty_arg
814 init_meth_params = init_meth_params + ", "
815 init_meth_params = init_meth_params + field_ty.java_ty + " " + field_ty.var_name
816 init_meth_body = init_meth_body + "this." + field_ty.var_name + " = " + field_ty.var_name + "; "
817 out_java.write("\t\t\t" + var_name + "(" + init_meth_params + ") { ")
818 out_java.write(init_meth_body)
819 out_java.write("}\n")
820 out_java.write("\t\t}\n")
821 init_meth_jty_strs[var_name] = init_meth_jty_str
822 out_java.write("\tstatic { " + struct_name + ".init(); }\n")
823 out_java.write("\tpublic static native " + struct_name + " " + struct_name + "_ref_from_ptr(long ptr);\n");
825 out_c.write("JNIEXPORT void JNICALL Java_org_ldk_impl_bindings_00024" + struct_name.replace("_", "_1") + "_init (JNIEnv * env, jclass _a) {\n")
826 for idx, struct_line in enumerate(tag_field_lines):
827 if idx != 0 and idx < len(tag_field_lines) - 3:
828 var_name = struct_line.strip(' ,')[len(struct_name) + 1:]
829 out_c.write("\t" + struct_name + "_" + var_name + "_class =\n")
830 out_c.write("\t\t(*env)->NewGlobalRef(env, (*env)->FindClass(env, \"Lorg/ldk/impl/bindings$" + struct_name + "$" + var_name + ";\"));\n")
831 out_c.write("\tDO_ASSERT(" + struct_name + "_" + var_name + "_class != NULL);\n")
832 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")
833 out_c.write("\tDO_ASSERT(" + struct_name + "_" + var_name + "_meth != NULL);\n")
835 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")
836 out_c.write("\t" + struct_name + " *obj = (" + struct_name + "*)ptr;\n")
837 out_c.write("\tswitch(obj->tag) {\n")
838 for idx, struct_line in enumerate(tag_field_lines):
839 if idx != 0 and idx < len(tag_field_lines) - 3:
840 var_name = struct_line.strip(' ,')[len(struct_name) + 1:]
841 out_c.write("\t\tcase " + struct_name + "_" + var_name + ": {\n")
843 if "LDK" + var_name in union_enum_items[struct_name]:
844 enum_var_lines = union_enum_items[struct_name]["LDK" + var_name]
845 for idx, field in enumerate(enum_var_lines):
846 if idx != 0 and idx < len(enum_var_lines) - 2:
847 field_map = map_type(field.strip(' ;'), False, None, False)
848 if field_map.ret_conv is not None:
849 out_c.write("\t\t\t" + field_map.ret_conv[0].replace("\n", "\n\t\t\t").replace("_env", "env"))
850 out_c.write("obj->" + camel_to_snake(var_name) + "." + field_map.arg_name)
851 out_c.write(field_map.ret_conv[1] + "\n")
852 c_params_text = c_params_text + ", " + field_map.ret_conv_name
854 c_params_text = c_params_text + ", obj->" + camel_to_snake(var_name) + "." + field_map.arg_name
855 out_c.write("\t\t\treturn (*env)->NewObject(env, " + struct_name + "_" + var_name + "_class, " + struct_name + "_" + var_name + "_meth" + c_params_text + ");\n")
856 out_c.write("\t\t}\n")
857 out_c.write("\t\tdefault: abort();\n")
858 out_c.write("\t}\n}\n")
859 elif is_unitary_enum:
860 with open(sys.argv[3] + "/" + struct_name + ".java", "w") as out_java_enum:
861 out_java_enum.write("package org.ldk.enums;\n\n")
862 unitary_enums.add(struct_name)
863 out_c.write("static inline " + struct_name + " " + struct_name + "_from_java(JNIEnv *env, jclass val) {\n")
864 out_c.write("\tswitch ((*env)->CallIntMethod(env, val, ordinal_meth)) {\n")
866 for idx, struct_line in enumerate(field_lines):
868 out_java_enum.write("public enum " + struct_name + " {\n")
869 elif idx == len(field_lines) - 3:
870 assert(struct_line.endswith("_Sentinel,"))
871 elif idx == len(field_lines) - 2:
872 out_java_enum.write("\t; static native void init();\n")
873 out_java_enum.write("\tstatic { init(); }\n")
874 out_java_enum.write("}")
875 out_java.write("\tstatic { " + struct_name + ".values(); /* Force enum statics to run */ }\n")
876 elif idx == len(field_lines) - 1:
877 assert(struct_line == "")
879 out_java_enum.write(struct_line + "\n")
880 out_c.write("\t\tcase %d: return %s;\n" % (ord_v, struct_line.strip().strip(",")))
883 out_c.write("\tabort();\n")
887 out_c.write("static jclass " + struct_name + "_class = NULL;\n")
888 for idx, struct_line in enumerate(field_lines):
889 if idx > 0 and idx < len(field_lines) - 3:
890 variant = struct_line.strip().strip(",")
891 out_c.write("static jfieldID " + struct_name + "_" + variant + " = NULL;\n")
892 out_c.write("JNIEXPORT void JNICALL Java_org_ldk_enums_" + struct_name.replace("_", "_1") + "_init (JNIEnv * env, jclass clz) {\n")
893 out_c.write("\t" + struct_name + "_class = (*env)->NewGlobalRef(env, clz);\n")
894 out_c.write("\tDO_ASSERT(" + struct_name + "_class != NULL);\n")
895 for idx, struct_line in enumerate(field_lines):
896 if idx > 0 and idx < len(field_lines) - 3:
897 variant = struct_line.strip().strip(",")
898 out_c.write("\t" + struct_name + "_" + variant + " = (*env)->GetStaticFieldID(env, " + struct_name + "_class, \"" + variant + "\", \"Lorg/ldk/enums/" + struct_name + ";\");\n")
899 out_c.write("\tDO_ASSERT(" + struct_name + "_" + variant + " != NULL);\n")
901 out_c.write("static inline jclass " + struct_name + "_to_java(JNIEnv *env, " + struct_name + " val) {\n")
902 out_c.write("\tswitch (val) {\n")
903 for idx, struct_line in enumerate(field_lines):
904 if idx > 0 and idx < len(field_lines) - 3:
905 variant = struct_line.strip().strip(",")
906 out_c.write("\t\tcase " + variant + ":\n")
907 out_c.write("\t\t\treturn (*env)->GetStaticObjectField(env, " + struct_name + "_class, " + struct_name + "_" + variant + ");\n")
909 out_c.write("\t\tdefault: abort();\n")
912 elif len(trait_fn_lines) > 0:
913 trait_structs.add(struct_name)
914 map_trait(struct_name, field_var_lines, trait_fn_lines)
917 fn_ptr = fn_ptr_regex.match(line)
918 fn_ret_arr = fn_ret_arr_regex.match(line)
919 reg_fn = reg_fn_regex.match(line)
920 const_val = const_val_regex.match(line)
922 if line.startswith("#include <"):
924 elif line.startswith("/*"):
925 #out_java.write("\t" + line)
926 if not line.endswith("*/\n"):
927 in_block_comment = True
928 elif line.startswith("typedef enum "):
930 elif line.startswith("typedef struct "):
932 elif line.startswith("typedef union "):
934 elif line.startswith("typedef "):
935 alias_match = struct_alias_regex.match(line)
936 if alias_match.group(1) in result_templ_structs:
937 out_java.write("\tpublic static native boolean " + alias_match.group(2) + "_result_ok(long arg);\n")
938 out_java.write("\tpublic static native long " + alias_match.group(2) + "_get_inner(long arg);\n")
939 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")
940 out_c.write("\treturn ((" + alias_match.group(2) + "*)arg)->result_ok;\n")
942 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")
943 out_c.write("\tif (((" + alias_match.group(2) + "*)arg)->result_ok) {\n")
944 out_c.write("\t\treturn (long)((" + alias_match.group(2) + "*)arg)->contents.result;\n")
945 out_c.write("\t} else {\n")
946 out_c.write("\t\treturn (long)((" + alias_match.group(2) + "*)arg)->contents.err;\n")
947 out_c.write("\t}\n}\n")
949 elif fn_ptr is not None:
950 map_fn(line, fn_ptr, None, None)
951 elif fn_ret_arr is not None:
952 map_fn(line, fn_ret_arr, fn_ret_arr.group(4), None)
953 elif reg_fn is not None:
954 map_fn(line, reg_fn, None, None)
955 elif const_val_regex is not None:
956 # TODO Map const variables
961 out_java.write("}\n")