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, 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, 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.ret_conv = ret_conv
35 self.ret_conv_name = ret_conv_name
38 out_c.write(self.c_ty)
39 out_java.write(self.java_ty)
42 if self.arg_name != "":
43 out_java.write(" " + self.arg_name)
44 out_c.write(" " + self.arg_name)
46 out_java.write(" arg")
48 fn_ptr_regex = re.compile("^extern const ([A-Za-z_0-9\* ]*) \(\*(.*)\)\((.*)\);$")
49 fn_ret_arr_regex = re.compile("(.*) \(\*(.*)\((.*)\)\)\[([0-9]*)\];$")
50 reg_fn_regex = re.compile("([A-Za-z_0-9\* ]* \*?)([a-zA-Z_0-9]*)\((.*)\);$")
52 with open(sys.argv[1]) as in_h:
54 reg_fn = reg_fn_regex.match(line)
55 if reg_fn is not None:
56 if reg_fn.group(2).endswith("_clone"):
57 clone_fns.add(reg_fn.group(2))
59 arr_fn = fn_ret_arr_regex.match(line)
60 if arr_fn is not None:
61 if arr_fn.group(2).endswith("_clone"):
62 clone_fns.add(arr_fn.group(2))
65 with open(sys.argv[1]) as in_h, open(sys.argv[2], "w") as out_java, open(sys.argv[4], "w") as out_c:
66 opaque_structs = set()
70 def camel_to_snake(s):
71 # Convert camel case to snake case, in a way that appears to match cbindgen
77 if lastchar.isupper():
78 if not char.isupper() and not lastund:
83 ret = ret + lastchar.lower()
86 if char.isupper() and not lastund:
94 return (ret + lastchar.lower()).strip("_")
96 var_is_arr_regex = re.compile("\(\*([A-za-z0-9_]*)\)\[([0-9]*)\]")
97 var_ty_regex = re.compile("([A-za-z_0-9]*)(.*)")
98 def java_c_types(fn_arg, ret_arr_len):
99 fn_arg = fn_arg.strip()
100 if fn_arg.startswith("MUST_USE_RES "):
103 if fn_arg.startswith("const "):
111 if fn_arg.startswith("LDKThirtyTwoBytes"):
112 fn_arg = "uint8_t (*" + fn_arg[18:] + ")[32]"
113 assert var_is_arr_regex.match(fn_arg[8:])
114 rust_obj = "LDKThirtyTwoBytes"
116 if fn_arg.startswith("LDKPublicKey"):
117 fn_arg = "uint8_t (*" + fn_arg[13:] + ")[33]"
118 assert var_is_arr_regex.match(fn_arg[8:])
119 rust_obj = "LDKPublicKey"
120 arr_access = "compressed_form"
121 #if fn_arg.startswith("LDKSignature"):
122 # fn_arg = "uint8_t (*" + fn_arg[13:] + ")[64]"
123 # assert var_is_arr_regex.match(fn_arg[8:])
124 # rust_obj = "LDKSignature"
126 if fn_arg.startswith("void"):
130 fn_arg = fn_arg[4:].strip()
131 elif fn_arg.startswith("bool"):
135 fn_arg = fn_arg[4:].strip()
136 elif fn_arg.startswith("uint8_t"):
140 fn_arg = fn_arg[7:].strip()
141 elif fn_arg.startswith("uint16_t"):
145 fn_arg = fn_arg[8:].strip()
146 elif fn_arg.startswith("uint32_t"):
150 fn_arg = fn_arg[8:].strip()
151 elif fn_arg.startswith("uint64_t") or fn_arg.startswith("uintptr_t"):
155 if fn_arg.startswith("uint64_t"):
156 fn_arg = fn_arg[8:].strip()
158 fn_arg = fn_arg[9:].strip()
159 elif is_const and fn_arg.startswith("char *"):
162 fn_ty_arg = "Ljava/lang/String;"
163 fn_arg = fn_arg[6:].strip()
165 ma = var_ty_regex.match(fn_arg)
166 if ma.group(1).strip() in unitary_enums:
167 java_ty = ma.group(1).strip()
169 fn_ty_arg = "Lorg/ldk/enums/" + ma.group(1).strip() + ";"
170 fn_arg = ma.group(2).strip()
171 rust_obj = ma.group(1).strip()
177 fn_arg = ma.group(2).strip()
178 rust_obj = ma.group(1).strip()
181 if fn_arg.startswith(" *") or fn_arg.startswith("*"):
182 fn_arg = fn_arg.replace("*", "").strip()
188 var_is_arr = var_is_arr_regex.match(fn_arg)
189 if var_is_arr is not None or ret_arr_len is not None:
190 assert(not take_by_ptr)
192 java_ty = java_ty + "[]"
193 c_ty = c_ty + "Array"
194 if var_is_arr is not None:
195 if var_is_arr.group(1) == "":
196 return TypeInfo(rust_obj=rust_obj, java_ty=java_ty, java_fn_ty_arg="[" + fn_ty_arg, c_ty=c_ty,
197 passed_as_ptr=False, is_ptr=False, var_name="arg", arr_len=var_is_arr.group(2), arr_access=arr_access)
198 return TypeInfo(rust_obj=rust_obj, java_ty=java_ty, java_fn_ty_arg="[" + fn_ty_arg, c_ty=c_ty,
199 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)
200 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,
201 is_ptr=is_ptr, var_name=fn_arg, arr_len=None, arr_access=None)
203 def map_type(fn_arg, print_void, ret_arr_len, is_free):
204 ty_info = java_c_types(fn_arg, ret_arr_len)
206 if ty_info.c_ty == "void":
208 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
209 arg_conv = None, arg_conv_name = None, ret_conv = None, ret_conv_name = None)
211 if ty_info.c_ty.endswith("Array"):
212 arr_len = ty_info.arr_len
213 if arr_len is not None:
214 arr_name = ty_info.var_name
217 arr_len = ret_arr_len
218 assert(ty_info.c_ty == "jbyteArray")
219 if ty_info.rust_obj is not None:
220 arg_conv = ty_info.rust_obj + " " + arr_name + "_ref;\n" + "(*_env)->GetByteArrayRegion (_env, " + arr_name + ", 0, " + arr_len + ", " + arr_name + "_ref." + ty_info.arr_access + ");"
221 arr_access = ("", "." + ty_info.arr_access)
223 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;"
224 arr_access = ("*", "")
225 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
227 arg_conv_name = arr_name + "_ref",
228 ret_conv = ("jbyteArray " + arr_name + "_arr = (*_env)->NewByteArray(_env, " + arr_len + ");\n" +
229 "(*_env)->SetByteArrayRegion(_env, " + arr_name + "_arr, 0, " + arr_len + ", " + arr_access[0],
230 arr_access[1] + ");"),
231 ret_conv_name = arr_name + "_arr")
232 elif ty_info.var_name != "":
233 # If we have a parameter name, print it (noting that it may indicate its a pointer)
234 if ty_info.rust_obj is not None:
235 assert(ty_info.passed_as_ptr)
236 opaque_arg_conv = ty_info.rust_obj + " " + ty_info.var_name + "_conv;\n"
237 opaque_arg_conv = opaque_arg_conv + ty_info.var_name + "_conv.inner = (void*)(" + ty_info.var_name + " & (~1));\n"
238 opaque_arg_conv = opaque_arg_conv + ty_info.var_name + "_conv.is_owned = (" + ty_info.var_name + " & 1) || (" + ty_info.var_name + " == 0);"
239 if (ty_info.rust_obj.replace("LDK", "") + "_clone") in clone_fns and not ty_info.is_ptr and not is_free:
240 # 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.
241 opaque_arg_conv = opaque_arg_conv + "\nif (" + ty_info.var_name + "_conv.inner != NULL)\n"
242 opaque_arg_conv = opaque_arg_conv + "\t" + ty_info.var_name + "_conv = " + ty_info.rust_obj.replace("LDK", "") + "_clone(&" + ty_info.var_name + "_conv);"
243 if not ty_info.is_ptr:
244 if ty_info.rust_obj in unitary_enums:
245 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
246 arg_conv = ty_info.rust_obj + " " + ty_info.var_name + "_conv = " + ty_info.rust_obj + "_from_java(_env, " + ty_info.var_name + ");",
247 arg_conv_name = ty_info.var_name + "_conv",
248 ret_conv = ("jclass " + ty_info.var_name + "_conv = " + ty_info.rust_obj + "_to_java(_env, ", ");"),
249 ret_conv_name = ty_info.var_name + "_conv")
250 if ty_info.rust_obj in opaque_structs:
251 ret_conv_suf = ";\nDO_ASSERT((((long)" + ty_info.var_name + "_var.inner) & 1) == 0); // We rely on a free low bit, malloc guarantees this.\n"
252 ret_conv_suf = ret_conv_suf + "DO_ASSERT((((long)&" + ty_info.var_name + "_var) & 1) == 0); // We rely on a free low bit, pointer alignment guarantees this.\n"
253 ret_conv_suf = ret_conv_suf + "long " + ty_info.var_name + "_ref;\n"
254 ret_conv_suf = ret_conv_suf + "if (" + ty_info.var_name + "_var.is_owned) {\n"
255 ret_conv_suf = ret_conv_suf + "\t" + ty_info.var_name + "_ref = (long)" + ty_info.var_name + "_var.inner | 1;\n"
256 ret_conv_suf = ret_conv_suf + "} else {\n"
257 ret_conv_suf = ret_conv_suf + "\t" + ty_info.var_name + "_ref = (long)&" + ty_info.var_name + "_var;\n"
258 ret_conv_suf = ret_conv_suf + "}"
259 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
260 arg_conv = opaque_arg_conv, arg_conv_name = ty_info.var_name + "_conv",
261 ret_conv = (ty_info.rust_obj + " " + ty_info.var_name + "_var = ", ret_conv_suf),
262 ret_conv_name = ty_info.var_name + "_ref")
263 base_conv = ty_info.rust_obj + " " + ty_info.var_name + "_conv = *(" + ty_info.rust_obj + "*)" + ty_info.var_name + ";";
264 if ty_info.rust_obj in trait_structs:
266 base_conv = base_conv + "\nif (" + ty_info.var_name + "_conv.free == " + ty_info.rust_obj + "_JCalls_free) {\n"
267 base_conv = base_conv + "\t// If this_arg is a JCalls struct, then we need to increment the refcnt in it.\n"
268 base_conv = base_conv + "\t" + ty_info.rust_obj + "_JCalls_clone(" + ty_info.var_name + "_conv.this_arg);\n}"
270 base_conv = base_conv + "\n" + "FREE((void*)" + ty_info.var_name + ");"
271 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
272 arg_conv = base_conv,
273 arg_conv_name = ty_info.var_name + "_conv",
274 ret_conv = ("CANT PASS TRAIT TO Java?", ""), ret_conv_name = "NO CONV POSSIBLE")
275 if ty_info.rust_obj != "LDKu8slice":
276 # Don't bother free'ing slices passed in - Rust doesn't auto-free the
277 # underlying unlike Vecs, and it gives Java more freedom.
278 base_conv = base_conv + "\nFREE((void*)" + ty_info.var_name + ");";
279 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
280 arg_conv = base_conv, arg_conv_name = ty_info.var_name + "_conv",
281 ret_conv = ("long " + ty_info.var_name + "_ref = (long)&", ";"), ret_conv_name = ty_info.var_name + "_ref")
284 if ty_info.rust_obj in opaque_structs:
285 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
286 arg_conv = opaque_arg_conv, arg_conv_name = "&" + ty_info.var_name + "_conv",
287 ret_conv = None, ret_conv_name = None) # its a pointer, no conv needed
288 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
289 arg_conv = ty_info.rust_obj + "* " + ty_info.var_name + "_conv = (" + ty_info.rust_obj + "*)" + ty_info.var_name + ";",
290 arg_conv_name = ty_info.var_name + "_conv",
291 ret_conv = None, ret_conv_name = None) # its a pointer, no conv needed
293 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
294 arg_conv = None, arg_conv_name = ty_info.var_name, ret_conv = None, ret_conv_name = None)
295 elif ty_info.java_ty == "String":
296 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
297 arg_conv = None, arg_conv_name = None,
298 ret_conv = ("jstring " + ty_info.var_name + "_conv = (*_env)->NewStringUTF(_env, ", ");"), ret_conv_name = ty_info.var_name + "_conv")
300 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
301 arg_conv = None, arg_conv_name = ty_info.var_name, ret_conv = None, ret_conv_name = None)
303 # We don't have a parameter name, and want one, just call it arg
304 if ty_info.rust_obj is not None:
305 assert(not is_free or ty_info.rust_obj not in opaque_structs);
306 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
307 arg_conv = ty_info.rust_obj + " arg_conv = *(" + ty_info.rust_obj + "*)arg;\nFREE((void*)arg);",
308 arg_conv_name = "arg_conv",
309 ret_conv = None, ret_conv_name = None)
312 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
313 arg_conv = None, arg_conv_name = "arg", ret_conv = None, ret_conv_name = None)
315 # We don't have a parameter name, and don't want one (cause we're returning)
316 if ty_info.rust_obj is not None:
317 if not ty_info.is_ptr:
318 if ty_info.rust_obj in unitary_enums:
319 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
320 arg_conv = ty_info.rust_obj + " ret = " + ty_info.rust_obj + "_from_java(_env, " + ty_info.var_name + ");",
321 arg_conv_name = "ret",
322 ret_conv = ("jclass ret = " + ty_info.rust_obj + "_to_java(_env, ", ");"), ret_conv_name = "ret")
323 if ty_info.rust_obj in opaque_structs:
324 # If we're returning a newly-allocated struct, we don't want Rust to ever
325 # free, instead relying on the Java GC to lose the ref. We undo this in
326 # any _free function.
327 # To avoid any issues, we first assert that the incoming object is non-ref.
328 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
329 ret_conv = (ty_info.rust_obj + " ret = ", ";"),
330 ret_conv_name = "((long)ret.inner) | (ret.is_owned ? 1 : 0)",
331 arg_conv = None, arg_conv_name = None)
333 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
334 ret_conv = (ty_info.rust_obj + "* ret = MALLOC(sizeof(" + ty_info.rust_obj + "), \"" + ty_info.rust_obj + "\");\n*ret = ", ";"),
335 ret_conv_name = "(long)ret",
336 arg_conv = None, arg_conv_name = None)
338 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
339 ret_conv = ("long ret = (long)", ";"), ret_conv_name = "ret",
340 arg_conv = None, arg_conv_name = None)
342 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
343 arg_conv = None, arg_conv_name = None, ret_conv = None, ret_conv_name = None)
345 def map_fn(line, re_match, ret_arr_len, c_call_string):
346 out_java.write("\t// " + line)
347 out_java.write("\tpublic static native ")
348 out_c.write("JNIEXPORT ")
350 ret_info = map_type(re_match.group(1), True, ret_arr_len, False)
352 if ret_info.ret_conv is not None:
353 ret_conv_pfx, ret_conv_sfx = ret_info.ret_conv
355 out_java.write(" " + re_match.group(2) + "(")
356 out_c.write(" JNICALL Java_org_ldk_impl_bindings_" + re_match.group(2).replace('_', '_1') + "(JNIEnv * _env, jclass _b")
359 for idx, arg in enumerate(re_match.group(3).split(',')):
364 arg_conv_info = map_type(arg, False, None, re_match.group(2).endswith("_free"))
365 if arg_conv_info.c_ty != "void":
366 arg_conv_info.print_ty()
367 arg_conv_info.print_name()
368 arg_names.append(arg_conv_info)
370 out_java.write(");\n")
373 for info in arg_names:
374 if info.arg_conv is not None:
375 out_c.write("\t" + info.arg_conv.replace('\n', "\n\t") + "\n");
377 if ret_info.ret_conv is not None:
378 out_c.write("\t" + ret_conv_pfx.replace('\n', '\n\t'));
380 out_c.write("\treturn ");
382 if c_call_string is None:
383 out_c.write(re_match.group(2) + "(")
385 out_c.write(c_call_string)
386 for idx, info in enumerate(arg_names):
387 if info.arg_conv_name is not None:
390 elif c_call_string is not None:
392 out_c.write(info.arg_conv_name)
394 if ret_info.ret_conv is not None:
395 out_c.write(ret_conv_sfx.replace('\n', '\n\t'))
396 out_c.write("\n\treturn " + ret_info.ret_conv_name + ";")
399 out_c.write("\n}\n\n")
401 def map_unitary_enum(struct_name, field_lines):
402 with open(sys.argv[3] + "/" + struct_name + ".java", "w") as out_java_enum:
403 out_java_enum.write("package org.ldk.enums;\n\n")
404 unitary_enums.add(struct_name)
405 out_c.write("static inline " + struct_name + " " + struct_name + "_from_java(JNIEnv *env, jclass val) {\n")
406 out_c.write("\tswitch ((*env)->CallIntMethod(env, val, ordinal_meth)) {\n")
408 for idx, struct_line in enumerate(field_lines):
410 out_java_enum.write("public enum " + struct_name + " {\n")
411 elif idx == len(field_lines) - 3:
412 assert(struct_line.endswith("_Sentinel,"))
413 elif idx == len(field_lines) - 2:
414 out_java_enum.write("\t; static native void init();\n")
415 out_java_enum.write("\tstatic { init(); }\n")
416 out_java_enum.write("}")
417 out_java.write("\tstatic { " + struct_name + ".values(); /* Force enum statics to run */ }\n")
418 elif idx == len(field_lines) - 1:
419 assert(struct_line == "")
421 out_java_enum.write(struct_line + "\n")
422 out_c.write("\t\tcase %d: return %s;\n" % (ord_v, struct_line.strip().strip(",")))
425 out_c.write("\tabort();\n")
429 out_c.write("static jclass " + struct_name + "_class = NULL;\n")
430 for idx, struct_line in enumerate(field_lines):
431 if idx > 0 and idx < len(field_lines) - 3:
432 variant = struct_line.strip().strip(",")
433 out_c.write("static jfieldID " + struct_name + "_" + variant + " = NULL;\n")
434 out_c.write("JNIEXPORT void JNICALL Java_org_ldk_enums_" + struct_name.replace("_", "_1") + "_init (JNIEnv * env, jclass clz) {\n")
435 out_c.write("\t" + struct_name + "_class = (*env)->NewGlobalRef(env, clz);\n")
436 out_c.write("\tDO_ASSERT(" + struct_name + "_class != NULL);\n")
437 for idx, struct_line in enumerate(field_lines):
438 if idx > 0 and idx < len(field_lines) - 3:
439 variant = struct_line.strip().strip(",")
440 out_c.write("\t" + struct_name + "_" + variant + " = (*env)->GetStaticFieldID(env, " + struct_name + "_class, \"" + variant + "\", \"Lorg/ldk/enums/" + struct_name + ";\");\n")
441 out_c.write("\tDO_ASSERT(" + struct_name + "_" + variant + " != NULL);\n")
443 out_c.write("static inline jclass " + struct_name + "_to_java(JNIEnv *env, " + struct_name + " val) {\n")
444 out_c.write("\tswitch (val) {\n")
445 for idx, struct_line in enumerate(field_lines):
446 if idx > 0 and idx < len(field_lines) - 3:
447 variant = struct_line.strip().strip(",")
448 out_c.write("\t\tcase " + variant + ":\n")
449 out_c.write("\t\t\treturn (*env)->GetStaticObjectField(env, " + struct_name + "_class, " + struct_name + "_" + variant + ");\n")
451 out_c.write("\t\tdefault: abort();\n")
455 def map_complex_enum(struct_name, union_enum_items):
456 tag_field_lines = union_enum_items["field_lines"]
457 init_meth_jty_strs = {}
458 for idx, struct_line in enumerate(tag_field_lines):
460 out_java.write("\tpublic static class " + struct_name + " {\n")
461 out_java.write("\t\tprivate " + struct_name + "() {}\n")
462 elif idx == len(tag_field_lines) - 3:
463 assert(struct_line.endswith("_Sentinel,"))
464 elif idx == len(tag_field_lines) - 2:
465 out_java.write("\t\tstatic native void init();\n")
466 out_java.write("\t}\n")
467 elif idx == len(tag_field_lines) - 1:
468 assert(struct_line == "")
470 var_name = struct_line.strip(' ,')[len(struct_name) + 1:]
471 out_java.write("\t\tpublic final static class " + var_name + " extends " + struct_name + " {\n")
472 out_c.write("static jclass " + struct_name + "_" + var_name + "_class = NULL;\n")
473 out_c.write("static jmethodID " + struct_name + "_" + var_name + "_meth = NULL;\n")
474 init_meth_jty_str = ""
475 init_meth_params = ""
477 if "LDK" + var_name in union_enum_items:
478 enum_var_lines = union_enum_items["LDK" + var_name]
479 for idx, field in enumerate(enum_var_lines):
480 if idx != 0 and idx < len(enum_var_lines) - 2:
481 field_ty = java_c_types(field.strip(' ;'), None)
482 out_java.write("\t\t\tpublic " + field_ty.java_ty + " " + field_ty.var_name + ";\n")
483 init_meth_jty_str = init_meth_jty_str + field_ty.java_fn_ty_arg
485 init_meth_params = init_meth_params + ", "
486 init_meth_params = init_meth_params + field_ty.java_ty + " " + field_ty.var_name
487 init_meth_body = init_meth_body + "this." + field_ty.var_name + " = " + field_ty.var_name + "; "
488 out_java.write("\t\t\t" + var_name + "(" + init_meth_params + ") { ")
489 out_java.write(init_meth_body)
490 out_java.write("}\n")
491 out_java.write("\t\t}\n")
492 init_meth_jty_strs[var_name] = init_meth_jty_str
493 out_java.write("\tstatic { " + struct_name + ".init(); }\n")
494 out_java.write("\tpublic static native " + struct_name + " " + struct_name + "_ref_from_ptr(long ptr);\n");
496 out_c.write("JNIEXPORT void JNICALL Java_org_ldk_impl_bindings_00024" + struct_name.replace("_", "_1") + "_init (JNIEnv * env, jclass _a) {\n")
497 for idx, struct_line in enumerate(tag_field_lines):
498 if idx != 0 and idx < len(tag_field_lines) - 3:
499 var_name = struct_line.strip(' ,')[len(struct_name) + 1:]
500 out_c.write("\t" + struct_name + "_" + var_name + "_class =\n")
501 out_c.write("\t\t(*env)->NewGlobalRef(env, (*env)->FindClass(env, \"Lorg/ldk/impl/bindings$" + struct_name + "$" + var_name + ";\"));\n")
502 out_c.write("\tDO_ASSERT(" + struct_name + "_" + var_name + "_class != NULL);\n")
503 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")
504 out_c.write("\tDO_ASSERT(" + struct_name + "_" + var_name + "_meth != NULL);\n")
506 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")
507 out_c.write("\t" + struct_name + " *obj = (" + struct_name + "*)ptr;\n")
508 out_c.write("\tswitch(obj->tag) {\n")
509 for idx, struct_line in enumerate(tag_field_lines):
510 if idx != 0 and idx < len(tag_field_lines) - 3:
511 var_name = struct_line.strip(' ,')[len(struct_name) + 1:]
512 out_c.write("\t\tcase " + struct_name + "_" + var_name + ": {\n")
514 if "LDK" + var_name in union_enum_items:
515 enum_var_lines = union_enum_items["LDK" + var_name]
516 for idx, field in enumerate(enum_var_lines):
517 if idx != 0 and idx < len(enum_var_lines) - 2:
518 field_map = map_type(field.strip(' ;'), False, None, False)
519 if field_map.ret_conv is not None:
520 out_c.write("\t\t\t" + field_map.ret_conv[0].replace("\n", "\n\t\t\t").replace("_env", "env"))
521 out_c.write("obj->" + camel_to_snake(var_name) + "." + field_map.arg_name)
522 out_c.write(field_map.ret_conv[1].replace("\n", "\n\t\t\t") + "\n")
523 c_params_text = c_params_text + ", " + field_map.ret_conv_name
525 c_params_text = c_params_text + ", obj->" + camel_to_snake(var_name) + "." + field_map.arg_name
526 out_c.write("\t\t\treturn (*env)->NewObject(env, " + struct_name + "_" + var_name + "_class, " + struct_name + "_" + var_name + "_meth" + c_params_text + ");\n")
527 out_c.write("\t\t}\n")
528 out_c.write("\t\tdefault: abort();\n")
529 out_c.write("\t}\n}\n")
531 def map_trait(struct_name, field_var_lines, trait_fn_lines):
532 out_c.write("typedef struct " + struct_name + "_JCalls {\n")
533 out_c.write("\tatomic_size_t refcnt;\n")
534 out_c.write("\tJavaVM *vm;\n")
535 out_c.write("\tjweak o;\n")
536 for var_line in field_var_lines:
537 if var_line.group(1) in trait_structs:
538 out_c.write("\t" + var_line.group(1) + "_JCalls* " + var_line.group(2) + ";\n")
539 for fn_line in trait_fn_lines:
540 if fn_line.group(2) != "free" and fn_line.group(2) != "clone":
541 out_c.write("\tjmethodID " + fn_line.group(2) + "_meth;\n")
542 out_c.write("} " + struct_name + "_JCalls;\n")
544 out_java.write("\tpublic interface " + struct_name + " {\n")
546 for fn_line in trait_fn_lines:
547 java_meth_descr = "("
548 if fn_line.group(2) != "free" and fn_line.group(2) != "clone":
549 ret_ty_info = java_c_types(fn_line.group(1), None)
551 out_java.write("\t\t " + ret_ty_info.java_ty + " " + fn_line.group(2) + "(")
552 is_const = fn_line.group(3) is not None
553 out_c.write(fn_line.group(1) + fn_line.group(2) + "_jcall(")
555 out_c.write("const void* this_arg")
557 out_c.write("void* this_arg")
560 for idx, arg in enumerate(fn_line.group(4).split(',')):
566 arg_conv_info = map_type(arg, True, None, False)
567 out_c.write(arg.strip())
568 out_java.write(arg_conv_info.java_ty + " " + arg_conv_info.arg_name)
569 arg_names.append(arg_conv_info)
570 java_meth_descr = java_meth_descr + arg_conv_info.java_fn_ty_arg
571 java_meth_descr = java_meth_descr + ")" + ret_ty_info.java_fn_ty_arg
572 java_meths.append(java_meth_descr)
574 out_java.write(");\n")
576 out_c.write("\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n")
577 out_c.write("\tJNIEnv *env;\n")
578 out_c.write("\tDO_ASSERT((*j_calls->vm)->GetEnv(j_calls->vm, (void**)&env, JNI_VERSION_1_8) == JNI_OK);\n")
580 for arg_info in arg_names:
581 if arg_info.ret_conv is not None:
582 out_c.write("\t" + arg_info.ret_conv[0].replace('\n', '\n\t').replace("_env", "env"));
583 out_c.write(arg_info.arg_name)
584 out_c.write(arg_info.ret_conv[1].replace('\n', '\n\t').replace("_env", "env") + "\n")
586 out_c.write("\tjobject obj = (*env)->NewLocalRef(env, j_calls->o);\n\tDO_ASSERT(obj != NULL);\n")
587 if ret_ty_info.c_ty.endswith("Array"):
588 assert(ret_ty_info.c_ty == "jbyteArray")
589 out_c.write("\tjbyteArray jret = (*env)->CallObjectMethod(env, obj, j_calls->" + fn_line.group(2) + "_meth")
590 elif not ret_ty_info.passed_as_ptr:
591 out_c.write("\treturn (*env)->Call" + ret_ty_info.java_ty.title() + "Method(env, obj, j_calls->" + fn_line.group(2) + "_meth")
593 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");
595 for arg_info in arg_names:
596 if arg_info.ret_conv is not None:
597 out_c.write(", " + arg_info.ret_conv_name)
599 out_c.write(", " + arg_info.arg_name)
601 if ret_ty_info.c_ty.endswith("Array"):
602 out_c.write("\t" + ret_ty_info.rust_obj + " ret;\n")
603 out_c.write("\t(*env)->GetByteArrayRegion(env, jret, 0, " + ret_ty_info.arr_len + ", ret." + ret_ty_info.arr_access + ");\n")
604 out_c.write("\treturn ret;\n")
606 if ret_ty_info.passed_as_ptr:
607 out_c.write("\t" + fn_line.group(1).strip() + " res = *ret;\n")
608 out_c.write("\tFREE(ret);\n")
609 out_c.write("\treturn res;\n")
611 elif fn_line.group(2) == "free":
612 out_c.write("static void " + struct_name + "_JCalls_free(void* this_arg) {\n")
613 out_c.write("\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n")
614 out_c.write("\tif (atomic_fetch_sub_explicit(&j_calls->refcnt, 1, memory_order_acquire) == 1) {\n")
615 out_c.write("\t\tJNIEnv *env;\n")
616 out_c.write("\t\tDO_ASSERT((*j_calls->vm)->GetEnv(j_calls->vm, (void**)&env, JNI_VERSION_1_8) == JNI_OK);\n")
617 out_c.write("\t\t(*env)->DeleteWeakGlobalRef(env, j_calls->o);\n")
618 out_c.write("\t\tFREE(j_calls);\n")
619 out_c.write("\t}\n}\n")
621 # Write out a clone function whether we need one or not, as we use them in moving to rust
622 out_c.write("static void* " + struct_name + "_JCalls_clone(const void* this_arg) {\n")
623 out_c.write("\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n")
624 out_c.write("\tatomic_fetch_add_explicit(&j_calls->refcnt, 1, memory_order_release);\n")
625 for var_line in field_var_lines:
626 if var_line.group(1) in trait_structs:
627 out_c.write("\tatomic_fetch_add_explicit(&j_calls->" + var_line.group(2) + "->refcnt, 1, memory_order_release);\n")
628 out_c.write("\treturn (void*) this_arg;\n")
631 out_java.write("\t}\n")
633 out_java.write("\tpublic static native long " + struct_name + "_new(" + struct_name + " impl")
634 out_c.write("static inline " + struct_name + " " + struct_name + "_init (JNIEnv * env, jclass _a, jobject o")
635 for var_line in field_var_lines:
636 if var_line.group(1) in trait_structs:
637 out_java.write(", " + var_line.group(1) + " " + var_line.group(2))
638 out_c.write(", jobject " + var_line.group(2))
639 out_java.write(");\n")
642 out_c.write("\tjclass c = (*env)->GetObjectClass(env, o);\n")
643 out_c.write("\tDO_ASSERT(c != NULL);\n")
644 out_c.write("\t" + struct_name + "_JCalls *calls = MALLOC(sizeof(" + struct_name + "_JCalls), \"" + struct_name + "_JCalls\");\n")
645 out_c.write("\tatomic_init(&calls->refcnt, 1);\n")
646 out_c.write("\tDO_ASSERT((*env)->GetJavaVM(env, &calls->vm) == 0);\n")
647 out_c.write("\tcalls->o = (*env)->NewWeakGlobalRef(env, o);\n")
648 for (fn_line, java_meth_descr) in zip(trait_fn_lines, java_meths):
649 if fn_line.group(2) != "free" and fn_line.group(2) != "clone":
650 out_c.write("\tcalls->" + fn_line.group(2) + "_meth = (*env)->GetMethodID(env, c, \"" + fn_line.group(2) + "\", \"" + java_meth_descr + "\");\n")
651 out_c.write("\tDO_ASSERT(calls->" + fn_line.group(2) + "_meth != NULL);\n")
652 out_c.write("\n\t" + struct_name + " ret = {\n")
653 out_c.write("\t\t.this_arg = (void*) calls,\n")
654 for fn_line in trait_fn_lines:
655 if fn_line.group(2) != "free" and fn_line.group(2) != "clone":
656 out_c.write("\t\t." + fn_line.group(2) + " = " + fn_line.group(2) + "_jcall,\n")
657 elif fn_line.group(2) == "free":
658 out_c.write("\t\t.free = " + struct_name + "_JCalls_free,\n")
660 out_c.write("\t\t.clone = " + struct_name + "_JCalls_clone,\n")
661 for var_line in field_var_lines:
662 if var_line.group(1) in trait_structs:
663 out_c.write("\t\t." + var_line.group(2) + " = " + var_line.group(1) + "_init(env, _a, " + var_line.group(2) + "),\n")
664 out_c.write("\t};\n")
665 for var_line in field_var_lines:
666 if var_line.group(1) in trait_structs:
667 out_c.write("\tcalls->" + var_line.group(2) + " = ret." + var_line.group(2) + ".this_arg;\n")
668 out_c.write("\treturn ret;\n")
671 out_c.write("JNIEXPORT long JNICALL Java_org_ldk_impl_bindings_" + struct_name.replace("_", "_1") + "_1new (JNIEnv * env, jclass _a, jobject o")
672 for var_line in field_var_lines:
673 if var_line.group(1) in trait_structs:
674 out_c.write(", jobject " + var_line.group(2))
676 out_c.write("\t" + struct_name + " *res_ptr = MALLOC(sizeof(" + struct_name + "), \"" + struct_name + "\");\n")
677 out_c.write("\t*res_ptr = " + struct_name + "_init(env, _a, o")
678 for var_line in field_var_lines:
679 if var_line.group(1) in trait_structs:
680 out_c.write(", " + var_line.group(2))
682 out_c.write("\treturn (long)res_ptr;\n")
685 out_java.write("\tpublic static native " + struct_name + " " + struct_name + "_get_obj_from_jcalls(long val);\n")
686 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")
687 out_c.write("\tjobject ret = (*env)->NewLocalRef(env, ((" + struct_name + "_JCalls*)val)->o);\n")
688 out_c.write("\tDO_ASSERT(ret != NULL);\n")
689 out_c.write("\treturn ret;\n")
692 for fn_line in trait_fn_lines:
693 # For now, just disable enabling the _call_log - we don't know how to inverse-map String
694 is_log = fn_line.group(2) == "log" and struct_name == "LDKLogger"
695 if fn_line.group(2) != "free" and fn_line.group(2) != "clone" and fn_line.group(2) != "eq" and not is_log:
696 dummy_line = fn_line.group(1) + struct_name + "_call_" + fn_line.group(2) + " " + struct_name + "* arg" + fn_line.group(4) + "\n"
697 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")
699 out_c.write("""#include \"org_ldk_impl_bindings.h\"
700 #include <rust_types.h>
701 #include <lightning.h>
703 #include <stdatomic.h>
706 if sys.argv[4] == "false":
707 out_c.write("#define MALLOC(a, _) malloc(a)\n")
708 out_c.write("#define FREE free\n")
709 out_c.write("#define DO_ASSERT(a) (void)(a)\n")
711 out_c.write("""#include <assert.h>
712 #define DO_ASSERT(a) do { bool _assert_val = (a); assert(_assert_val); } while(0)
714 // Running a leak check across all the allocations and frees of the JDK is a mess,
715 // so instead we implement our own naive leak checker here, relying on the -wrap
716 // linker option to wrap malloc/calloc/realloc/free, tracking everyhing allocated
717 // and free'd in Rust or C across the generated bindings shared library.
719 #include <execinfo.h>
721 static mtx_t allocation_mtx;
723 void __attribute__((constructor)) init_mtx() {
724 DO_ASSERT(mtx_init(&allocation_mtx, mtx_plain) == thrd_success);
728 typedef struct allocation {
729 struct allocation* next;
731 const char* struct_name;
735 static allocation* allocation_ll = NULL;
737 void* __real_malloc(size_t len);
738 void* __real_calloc(size_t nmemb, size_t len);
739 static void new_allocation(void* res, const char* struct_name) {
740 allocation* new_alloc = __real_malloc(sizeof(allocation));
741 new_alloc->ptr = res;
742 new_alloc->struct_name = struct_name;
743 new_alloc->bt_len = backtrace(new_alloc->bt, BT_MAX);
744 DO_ASSERT(mtx_lock(&allocation_mtx) == thrd_success);
745 new_alloc->next = allocation_ll;
746 allocation_ll = new_alloc;
747 DO_ASSERT(mtx_unlock(&allocation_mtx) == thrd_success);
749 static void* MALLOC(size_t len, const char* struct_name) {
750 void* res = __real_malloc(len);
751 new_allocation(res, struct_name);
754 void __real_free(void* ptr);
755 static void alloc_freed(void* ptr) {
756 allocation* p = NULL;
757 DO_ASSERT(mtx_lock(&allocation_mtx) == thrd_success);
758 allocation* it = allocation_ll;
759 while (it->ptr != ptr) { p = it; it = it->next; }
760 if (p) { p->next = it->next; } else { allocation_ll = it->next; }
761 DO_ASSERT(mtx_unlock(&allocation_mtx) == thrd_success);
762 DO_ASSERT(it->ptr == ptr);
765 static void FREE(void* ptr) {
770 void* __wrap_malloc(size_t len) {
771 void* res = __real_malloc(len);
772 new_allocation(res, "malloc call");
775 void* __wrap_calloc(size_t nmemb, size_t len) {
776 void* res = __real_calloc(nmemb, len);
777 new_allocation(res, "calloc call");
780 void __wrap_free(void* ptr) {
785 void* __real_realloc(void* ptr, size_t newlen);
786 void* __wrap_realloc(void* ptr, size_t len) {
788 void* res = __real_realloc(ptr, len);
789 new_allocation(res, "realloc call");
792 void __wrap_reallocarray(void* ptr, size_t new_sz) {
793 // Rust doesn't seem to use reallocarray currently
797 void __attribute__((destructor)) check_leaks() {
798 for (allocation* a = allocation_ll; a != NULL; a = a->next) {
799 fprintf(stderr, "%s %p remains:\\n", a->struct_name, a->ptr);
800 backtrace_symbols_fd(a->bt, a->bt_len, STDERR_FILENO);
801 fprintf(stderr, "\\n\\n");
803 DO_ASSERT(allocation_ll == NULL);
806 out_java.write("""package org.ldk.impl;
807 import org.ldk.enums.*;
809 public class bindings {
810 public static class VecOrSliceDef {
814 public VecOrSliceDef(long dataptr, long datalen, long stride) {
815 this.dataptr = dataptr; this.datalen = datalen; this.stride = stride;
819 System.loadLibrary(\"lightningjni\");
820 init(java.lang.Enum.class, VecOrSliceDef.class);
822 static native void init(java.lang.Class c, java.lang.Class slicedef);
824 public static native boolean deref_bool(long ptr);
825 public static native long deref_long(long ptr);
826 public static native void free_heap_ptr(long ptr);
827 public static native byte[] read_bytes(long ptr, long len);
828 public static native byte[] get_u8_slice_bytes(long slice_ptr);
829 public static native long bytes_to_u8_vec(byte[] bytes);
830 public static native long new_txpointer_copy_data(byte[] txdata);
831 public static native long vec_slice_len(long vec);
832 public static native long new_empty_slice_vec();
836 static jmethodID ordinal_meth = NULL;
837 static jmethodID slicedef_meth = NULL;
838 static jclass slicedef_cls = NULL;
839 JNIEXPORT void Java_org_ldk_impl_bindings_init(JNIEnv * env, jclass _b, jclass enum_class, jclass slicedef_class) {
840 ordinal_meth = (*env)->GetMethodID(env, enum_class, "ordinal", "()I");
841 DO_ASSERT(ordinal_meth != NULL);
842 slicedef_meth = (*env)->GetMethodID(env, slicedef_class, "<init>", "(JJJ)V");
843 DO_ASSERT(slicedef_meth != NULL);
844 slicedef_cls = (*env)->NewGlobalRef(env, slicedef_class);
845 DO_ASSERT(slicedef_cls != NULL);
848 JNIEXPORT jboolean JNICALL Java_org_ldk_impl_bindings_deref_1bool (JNIEnv * env, jclass _a, jlong ptr) {
849 return *((bool*)ptr);
851 JNIEXPORT jlong JNICALL Java_org_ldk_impl_bindings_deref_1long (JNIEnv * env, jclass _a, jlong ptr) {
852 return *((long*)ptr);
854 JNIEXPORT void JNICALL Java_org_ldk_impl_bindings_free_1heap_1ptr (JNIEnv * env, jclass _a, jlong ptr) {
857 JNIEXPORT jbyteArray JNICALL Java_org_ldk_impl_bindings_read_1bytes (JNIEnv * _env, jclass _b, jlong ptr, jlong len) {
858 jbyteArray ret_arr = (*_env)->NewByteArray(_env, len);
859 (*_env)->SetByteArrayRegion(_env, ret_arr, 0, len, (unsigned char*)ptr);
862 JNIEXPORT jbyteArray JNICALL Java_org_ldk_impl_bindings_get_1u8_1slice_1bytes (JNIEnv * _env, jclass _b, jlong slice_ptr) {
863 LDKu8slice *slice = (LDKu8slice*)slice_ptr;
864 jbyteArray ret_arr = (*_env)->NewByteArray(_env, slice->datalen);
865 (*_env)->SetByteArrayRegion(_env, ret_arr, 0, slice->datalen, slice->data);
868 JNIEXPORT long JNICALL Java_org_ldk_impl_bindings_bytes_1to_1u8_1vec (JNIEnv * _env, jclass _b, jbyteArray bytes) {
869 LDKCVec_u8Z *vec = (LDKCVec_u8Z*)MALLOC(sizeof(LDKCVec_u8Z), "LDKCVec_u8");
870 vec->datalen = (*_env)->GetArrayLength(_env, bytes);
871 vec->data = (uint8_t*)MALLOC(vec->datalen, "LDKCVec_u8Z Bytes");
872 (*_env)->GetByteArrayRegion (_env, bytes, 0, vec->datalen, vec->data);
875 JNIEXPORT long JNICALL Java_org_ldk_impl_bindings_new_1txpointer_1copy_1data (JNIEnv * env, jclass _b, jbyteArray bytes) {
876 LDKTransaction *txdata = (LDKTransaction*)MALLOC(sizeof(LDKTransaction), "LDKTransaction");
877 txdata->datalen = (*env)->GetArrayLength(env, bytes);
878 txdata->data = (uint8_t*)MALLOC(txdata->datalen, "Tx Data Bytes");
879 txdata->data_is_owned = true;
880 (*env)->GetByteArrayRegion (env, bytes, 0, txdata->datalen, txdata->data);
883 JNIEXPORT jlong JNICALL Java_org_ldk_impl_bindings_vec_1slice_1len (JNIEnv * env, jclass _a, jlong ptr) {
884 // Check offsets of a few Vec types are all consistent as we're meant to be generic across types
885 _Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKCVec_SignatureZ, datalen), "Vec<*> needs to be mapped identically");
886 _Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKCVec_MessageSendEventZ, datalen), "Vec<*> needs to be mapped identically");
887 _Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKCVec_EventZ, datalen), "Vec<*> needs to be mapped identically");
888 _Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKCVec_C2Tuple_usizeTransactionZZ, datalen), "Vec<*> needs to be mapped identically");
889 LDKCVec_u8Z *vec = (LDKCVec_u8Z*)ptr;
890 return (long)vec->datalen;
892 JNIEXPORT long JNICALL Java_org_ldk_impl_bindings_new_1empty_1slice_1vec (JNIEnv * _env, jclass _b) {
893 // Check sizes of a few Vec types are all consistent as we're meant to be generic across types
894 _Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKCVec_SignatureZ), "Vec<*> needs to be mapped identically");
895 _Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKCVec_MessageSendEventZ), "Vec<*> needs to be mapped identically");
896 _Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKCVec_EventZ), "Vec<*> needs to be mapped identically");
897 _Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKCVec_C2Tuple_usizeTransactionZZ), "Vec<*> needs to be mapped identically");
898 LDKCVec_u8Z *vec = (LDKCVec_u8Z*)MALLOC(sizeof(LDKCVec_u8Z), "Empty LDKCVec");
904 // We assume that CVec_u8Z and u8slice are the same size and layout (and thus pointers to the two can be mixed)
905 _Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKu8slice), "Vec<u8> and [u8] need to have been mapped identically");
906 _Static_assert(offsetof(LDKCVec_u8Z, data) == offsetof(LDKu8slice, data), "Vec<u8> and [u8] need to have been mapped identically");
907 _Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKu8slice, datalen), "Vec<u8> and [u8] need to have been mapped identically");
911 # XXX: Temporarily write out a manual SecretKey_new() for testing, we should auto-gen this kind of thing
912 out_java.write("\tpublic static native long LDKSecretKey_new();\n\n") # TODO: rm me
913 out_c.write("JNIEXPORT jlong JNICALL Java_org_ldk_impl_bindings_LDKSecretKey_1new(JNIEnv * _env, jclass _b) {\n") # TODO: rm me
914 out_c.write("\tLDKSecretKey* key = (LDKSecretKey*)MALLOC(sizeof(LDKSecretKey), \"LDKSecretKey\");\n") # TODO: rm me
915 out_c.write("\treturn (long)key;\n") # TODO: rm me
916 out_c.write("}\n") # TODO: rm me
918 in_block_comment = False
921 fn_ptr_regex = re.compile("^extern const ([A-Za-z_0-9\* ]*) \(\*(.*)\)\((.*)\);$")
922 fn_ret_arr_regex = re.compile("(.*) \(\*(.*)\((.*)\)\)\[([0-9]*)\];$")
923 reg_fn_regex = re.compile("([A-Za-z_0-9\* ]* \*?)([a-zA-Z_0-9]*)\((.*)\);$")
924 const_val_regex = re.compile("^extern const ([A-Za-z_0-9]*) ([A-Za-z_0-9]*);$")
926 line_indicates_result_regex = re.compile("^ (LDKCResultPtr_[A-Za-z_0-9]*) contents;$")
927 line_indicates_vec_regex = re.compile("^ ([A-Za-z_0-9]*) \*data;$")
928 line_indicates_opaque_regex = re.compile("^ bool is_owned;$")
929 line_indicates_trait_regex = re.compile("^ ([A-Za-z_0-9]* \*?)\(\*([A-Za-z_0-9]*)\)\((const )?void \*this_arg(.*)\);$")
930 assert(line_indicates_trait_regex.match(" uintptr_t (*send_data)(void *this_arg, LDKu8slice data, bool resume_read);"))
931 assert(line_indicates_trait_regex.match(" LDKCVec_MessageSendEventZ (*get_and_clear_pending_msg_events)(const void *this_arg);"))
932 assert(line_indicates_trait_regex.match(" void *(*clone)(const void *this_arg);"))
933 line_field_var_regex = re.compile("^ ([A-Za-z_0-9]*) ([A-Za-z_0-9]*);$")
934 assert(line_field_var_regex.match(" LDKMessageSendEventsProvider MessageSendEventsProvider;"))
935 struct_name_regex = re.compile("^typedef (struct|enum|union) (MUST_USE_STRUCT )?(LDK[A-Za-z_0-9]*) {$")
936 assert(struct_name_regex.match("typedef struct LDKCVecTempl_u8 {"))
937 assert(struct_name_regex.match("typedef enum LDKNetwork {"))
938 struct_alias_regex = re.compile("^typedef (LDK[A-Za-z_0-9]*) (LDK[A-Za-z_0-9]*);$")
939 assert(struct_alias_regex.match("typedef LDKCResultTempl_bool__PeerHandleError LDKCResult_boolPeerHandleErrorZ;"))
941 result_templ_structs = set()
942 union_enum_items = {}
943 result_ptr_struct_items = {}
946 if line.endswith("*/\n"):
947 in_block_comment = False
948 elif cur_block_obj is not None:
949 cur_block_obj = cur_block_obj + line
950 if line.startswith("} "):
954 obj_lines = cur_block_obj.split("\n")
956 result_contents = None
957 is_unitary_enum = False
958 is_union_enum = False
964 for idx, struct_line in enumerate(obj_lines):
965 if struct_line.strip().startswith("/*"):
966 in_block_comment = True
968 if struct_line.endswith("*/"):
969 in_block_comment = False
971 struct_name_match = struct_name_regex.match(struct_line)
972 if struct_name_match is not None:
973 struct_name = struct_name_match.group(3)
974 if struct_name_match.group(1) == "enum":
975 if not struct_name.endswith("_Tag"):
976 is_unitary_enum = True
979 elif struct_name_match.group(1) == "union":
981 if line_indicates_opaque_regex.match(struct_line):
983 result_match = line_indicates_result_regex.match(struct_line)
984 if result_match is not None:
985 result_contents = result_match.group(1)
986 vec_ty_match = line_indicates_vec_regex.match(struct_line)
987 if vec_ty_match is not None and struct_name.startswith("LDKCVecTempl_"):
988 vec_ty = vec_ty_match.group(1)
989 elif struct_name.startswith("LDKC2TupleTempl_") or struct_name.startswith("LDKC3TupleTempl_"):
991 trait_fn_match = line_indicates_trait_regex.match(struct_line)
992 if trait_fn_match is not None:
993 trait_fn_lines.append(trait_fn_match)
994 field_var_match = line_field_var_regex.match(struct_line)
995 if field_var_match is not None:
996 field_var_lines.append(field_var_match)
997 field_lines.append(struct_line)
999 assert(struct_name is not None)
1000 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))
1001 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))
1002 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))
1003 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))
1004 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))
1005 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))
1006 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))
1009 opaque_structs.add(struct_name)
1010 elif result_contents is not None:
1011 result_templ_structs.add(struct_name)
1012 assert result_contents in result_ptr_struct_items
1013 elif struct_name.startswith("LDKCResultPtr_"):
1014 for line in field_lines:
1015 if line.endswith("*result;"):
1016 res_ty = line[:-8].strip()
1017 elif line.endswith("*err;"):
1018 err_ty = line[:-5].strip()
1019 result_ptr_struct_items[struct_name] = (res_ty, err_ty)
1021 out_java.write("\tpublic static native long " + struct_name + "_new(")
1022 out_c.write("JNIEXPORT jlong JNICALL Java_org_ldk_impl_bindings_" + struct_name.replace("_", "_1") + "_1new(JNIEnv *_env, jclass _b")
1023 for idx, line in enumerate(field_lines):
1024 if idx != 0 and idx < len(field_lines) - 2:
1025 ty_info = java_c_types(line.strip(';'), None)
1027 out_java.write(", ")
1028 e = chr(ord('a') + idx - 1)
1029 out_java.write(ty_info.java_ty + " " + e)
1030 out_c.write(", " + ty_info.c_ty + " " + e)
1031 out_java.write(");\n")
1032 out_c.write(") {\n")
1033 out_c.write("\t" + struct_name + "* ret = MALLOC(sizeof(" + struct_name + "), \"" + struct_name + "\");\n")
1034 for idx, line in enumerate(field_lines):
1035 if idx != 0 and idx < len(field_lines) - 2:
1036 ty_info = map_type(line.strip(';'), False, None, False)
1037 e = chr(ord('a') + idx - 1)
1038 if ty_info.arg_conv is not None:
1039 out_c.write("\t" + ty_info.arg_conv.replace("\n", "\n\t"))
1040 out_c.write("\n\tret->" + e + " = " + ty_info.arg_conv_name + ";\n")
1042 out_c.write("\tret->" + e + " = " + e + ";\n")
1043 out_c.write("\treturn (long)ret;\n")
1045 elif vec_ty is not None:
1046 if vec_ty in opaque_structs:
1047 out_java.write("\tpublic static native long[] " + struct_name + "_arr_info(long vec_ptr);\n")
1048 out_c.write("JNIEXPORT jlongArray JNICALL Java_org_ldk_impl_bindings_" + struct_name.replace("_", "_1") + "_1arr_1info(JNIEnv *env, jclass _b, jlong ptr) {\n")
1050 out_java.write("\tpublic static native VecOrSliceDef " + struct_name + "_arr_info(long vec_ptr);\n")
1051 out_c.write("JNIEXPORT jobject JNICALL Java_org_ldk_impl_bindings_" + struct_name.replace("_", "_1") + "_1arr_1info(JNIEnv *env, jclass _b, jlong ptr) {\n")
1052 out_c.write("\t" + struct_name + " *vec = (" + struct_name + "*)ptr;\n")
1053 if vec_ty in opaque_structs:
1054 out_c.write("\tjlongArray ret = (*env)->NewLongArray(env, vec->datalen);\n")
1055 out_c.write("\tjlong *ret_elems = (*env)->GetPrimitiveArrayCritical(env, ret, NULL);\n")
1056 out_c.write("\tfor (size_t i = 0; i < vec->datalen; i++) {\n")
1057 out_c.write("\t\tDO_ASSERT((((long)vec->data[i].inner) & 1) == 0);\n")
1058 out_c.write("\t\tret_elems[i] = (long)vec->data[i].inner | (vec->data[i].is_owned ? 1 : 0);\n")
1059 out_c.write("\t}\n")
1060 out_c.write("\t(*env)->ReleasePrimitiveArrayCritical(env, ret, ret_elems, 0);\n")
1061 out_c.write("\treturn ret;\n")
1063 out_c.write("\treturn (*env)->NewObject(env, slicedef_cls, slicedef_meth, (long)vec->data, (long)vec->datalen, sizeof(" + vec_ty + "));\n")
1066 ty_info = map_type(vec_ty + " arr_elem", False, None, False)
1067 if len(ty_info.java_fn_ty_arg) == 1: # ie we're a primitive of some form
1068 out_java.write("\tpublic static native long " + struct_name + "_new(" + ty_info.java_ty + "[] elems);\n")
1069 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")
1070 out_c.write("\t" + struct_name + " *ret = MALLOC(sizeof(" + struct_name + "), \"" + struct_name + "\");\n")
1071 out_c.write("\tret->datalen = (*env)->GetArrayLength(env, elems);\n")
1072 out_c.write("\tif (ret->datalen == 0) {\n")
1073 out_c.write("\t\tret->data = NULL;\n")
1074 out_c.write("\t} else {\n")
1075 out_c.write("\t\tret->data = MALLOC(sizeof(" + vec_ty + ") * ret->datalen, \"" + struct_name + " Data\");\n")
1076 out_c.write("\t\t" + ty_info.c_ty + " *java_elems = (*env)->GetPrimitiveArrayCritical(env, elems, NULL);\n")
1077 out_c.write("\t\tfor (size_t i = 0; i < ret->datalen; i++) {\n")
1078 if ty_info.arg_conv is not None:
1079 out_c.write("\t\t\t" + ty_info.c_ty + " arr_elem = java_elems[i];\n")
1080 out_c.write("\t\t\t" + ty_info.arg_conv.replace("\n", "\n\t\t\t") + "\n")
1081 out_c.write("\t\t\tret->data[i] = " + ty_info.arg_conv_name + ";\n")
1083 out_c.write("\t\t\tret->data[i] = java_elems[i];\n")
1084 out_c.write("\t\t}\n")
1085 out_c.write("\t\t(*env)->ReleasePrimitiveArrayCritical(env, elems, java_elems, 0);\n")
1086 out_c.write("\t}\n")
1087 out_c.write("\treturn (long)ret;\n")
1090 assert(struct_name.endswith("_Tag"))
1091 struct_name = struct_name[:-4]
1092 union_enum_items[struct_name] = {"field_lines": field_lines}
1093 elif struct_name.endswith("_Body") and struct_name.split("_")[0] in union_enum_items:
1094 enum_var_name = struct_name.split("_")
1095 union_enum_items[enum_var_name[0]][enum_var_name[1]] = field_lines
1096 elif struct_name in union_enum_items:
1097 map_complex_enum(struct_name, union_enum_items[struct_name])
1098 elif is_unitary_enum:
1099 map_unitary_enum(struct_name, field_lines)
1100 elif len(trait_fn_lines) > 0:
1101 trait_structs.add(struct_name)
1102 map_trait(struct_name, field_var_lines, trait_fn_lines)
1103 cur_block_obj = None
1105 fn_ptr = fn_ptr_regex.match(line)
1106 fn_ret_arr = fn_ret_arr_regex.match(line)
1107 reg_fn = reg_fn_regex.match(line)
1108 const_val = const_val_regex.match(line)
1110 if line.startswith("#include <"):
1112 elif line.startswith("/*"):
1113 #out_java.write("\t" + line)
1114 if not line.endswith("*/\n"):
1115 in_block_comment = True
1116 elif line.startswith("typedef enum "):
1117 cur_block_obj = line
1118 elif line.startswith("typedef struct "):
1119 cur_block_obj = line
1120 elif line.startswith("typedef union "):
1121 cur_block_obj = line
1122 elif line.startswith("typedef "):
1123 alias_match = struct_alias_regex.match(line)
1124 if alias_match.group(1) in result_templ_structs:
1125 out_java.write("\tpublic static native boolean " + alias_match.group(2) + "_result_ok(long arg);\n")
1126 out_java.write("\tpublic static native long " + alias_match.group(2) + "_get_inner(long arg);\n")
1127 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")
1128 out_c.write("\treturn ((" + alias_match.group(2) + "*)arg)->result_ok;\n")
1130 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")
1131 contents_ty = alias_match.group(1).replace("LDKCResultTempl", "LDKCResultPtr")
1132 res_ty, err_ty = result_ptr_struct_items[contents_ty]
1133 out_c.write("\t" + alias_match.group(2) + " *val = (" + alias_match.group(2) + "*)arg;\n")
1134 out_c.write("\tif (val->result_ok) {\n")
1135 if res_ty not in opaque_structs:
1136 out_c.write("\t\treturn (long)val->contents.result;\n")
1138 out_c.write("\t\treturn (long)(val->contents.result->inner) | (val->contents.result->is_owned ? 1 : 0);\n")
1139 out_c.write("\t} else {\n")
1140 if err_ty not in opaque_structs:
1141 out_c.write("\t\treturn (long)val->contents.err;\n")
1143 out_c.write("\t\treturn (long)(val->contents.err->inner) | (val->contents.err->is_owned ? 1 : 0);\n")
1144 out_c.write("\t}\n}\n")
1146 elif fn_ptr is not None:
1147 map_fn(line, fn_ptr, None, None)
1148 elif fn_ret_arr is not None:
1149 map_fn(line, fn_ret_arr, fn_ret_arr.group(4), None)
1150 elif reg_fn is not None:
1151 map_fn(line, reg_fn, None, None)
1152 elif const_val_regex is not None:
1153 # TODO Map const variables
1156 assert(line == "\n")
1158 out_java.write("}\n")