5 print("USAGE: /path/to/lightning.h /path/to/bindings/output.java /path/to/bindings/ /path/to/bindings/output.c debug")
6 print("debug should be true or false and indicates whether to track allocations and ensure we don't leak")
10 def __init__(self, rust_obj, java_ty, java_fn_ty_arg, java_hu_ty, 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_hu_ty = java_hu_ty
14 self.java_fn_ty_arg = java_fn_ty_arg
16 self.passed_as_ptr = passed_as_ptr
18 self.var_name = var_name
19 self.arr_len = arr_len
20 self.arr_access = arr_access
23 def __init__(self, ty_info, arg_name, arg_conv, arg_conv_name, arg_conv_cleanup, ret_conv, ret_conv_name, to_hu_conv, from_hu_conv):
24 assert(ty_info.c_ty is not None)
25 assert(ty_info.java_ty is not None)
26 assert(arg_name is not None)
27 self.passed_as_ptr = ty_info.passed_as_ptr
28 self.rust_obj = ty_info.rust_obj
29 self.c_ty = ty_info.c_ty
30 self.java_ty = ty_info.java_ty
31 self.java_hu_ty = ty_info.java_hu_ty
32 self.java_fn_ty_arg = ty_info.java_fn_ty_arg
33 self.arg_name = arg_name
34 self.arg_conv = arg_conv
35 self.arg_conv_name = arg_conv_name
36 self.arg_conv_cleanup = arg_conv_cleanup
37 self.ret_conv = ret_conv
38 self.ret_conv_name = ret_conv_name
39 self.to_hu_conv = to_hu_conv
40 self.from_hu_conv = from_hu_conv
43 out_c.write(self.c_ty)
44 out_java.write(self.java_ty)
47 if self.arg_name != "":
48 out_java.write(" " + self.arg_name)
49 out_c.write(" " + self.arg_name)
51 out_java.write(" arg")
54 def camel_to_snake(s):
55 # Convert camel case to snake case, in a way that appears to match cbindgen
61 if lastchar.isupper():
62 if not char.isupper() and not lastund:
67 ret = ret + lastchar.lower()
70 if char.isupper() and not lastund:
78 return (ret + lastchar.lower()).strip("_")
81 opaque_structs = set()
84 var_is_arr_regex = re.compile("\(\*([A-za-z0-9_]*)\)\[([a-z0-9]*)\]")
85 var_ty_regex = re.compile("([A-za-z_0-9]*)(.*)")
86 def java_c_types(fn_arg, ret_arr_len):
87 fn_arg = fn_arg.strip()
88 if fn_arg.startswith("MUST_USE_RES "):
91 if fn_arg.startswith("const "):
100 if fn_arg.startswith("LDKThirtyTwoBytes"):
101 fn_arg = "uint8_t (*" + fn_arg[18:] + ")[32]"
102 assert var_is_arr_regex.match(fn_arg[8:])
103 rust_obj = "LDKThirtyTwoBytes"
105 if fn_arg.startswith("LDKPublicKey"):
106 fn_arg = "uint8_t (*" + fn_arg[13:] + ")[33]"
107 assert var_is_arr_regex.match(fn_arg[8:])
108 rust_obj = "LDKPublicKey"
109 arr_access = "compressed_form"
110 if fn_arg.startswith("LDKSecretKey"):
111 fn_arg = "uint8_t (*" + fn_arg[13:] + ")[32]"
112 assert var_is_arr_regex.match(fn_arg[8:])
113 rust_obj = "LDKSecretKey"
115 if fn_arg.startswith("LDKSignature"):
116 fn_arg = "uint8_t (*" + fn_arg[13:] + ")[64]"
117 assert var_is_arr_regex.match(fn_arg[8:])
118 rust_obj = "LDKSignature"
119 arr_access = "compact_form"
120 if fn_arg.startswith("LDKThreeBytes"):
121 fn_arg = "uint8_t (*" + fn_arg[14:] + ")[3]"
122 assert var_is_arr_regex.match(fn_arg[8:])
123 rust_obj = "LDKThreeBytes"
125 if fn_arg.startswith("LDKu8slice"):
126 fn_arg = "uint8_t (*" + fn_arg[11:] + ")[datalen]"
127 assert var_is_arr_regex.match(fn_arg[8:])
128 rust_obj = "LDKu8slice"
130 if fn_arg.startswith("LDKCVecTempl_u8") or fn_arg.startswith("LDKCVec_u8Z"):
131 if fn_arg.startswith("LDKCVecTempl_u8"):
132 fn_arg = "uint8_t (*" + fn_arg[16:] + ")[datalen]"
133 rust_obj = "LDKCVecTempl_u8"
134 assert var_is_arr_regex.match(fn_arg[8:])
136 fn_arg = "uint8_t (*" + fn_arg[12:] + ")[datalen]"
137 rust_obj = "LDKCVec_u8Z"
138 assert var_is_arr_regex.match(fn_arg[8:])
141 if fn_arg.startswith("void"):
145 fn_arg = fn_arg[4:].strip()
146 elif fn_arg.startswith("bool"):
150 fn_arg = fn_arg[4:].strip()
151 elif fn_arg.startswith("uint8_t"):
155 fn_arg = fn_arg[7:].strip()
156 elif fn_arg.startswith("uint16_t"):
160 fn_arg = fn_arg[8:].strip()
161 elif fn_arg.startswith("uint32_t"):
165 fn_arg = fn_arg[8:].strip()
166 elif fn_arg.startswith("uint64_t") or fn_arg.startswith("uintptr_t"):
170 if fn_arg.startswith("uint64_t"):
171 fn_arg = fn_arg[8:].strip()
173 fn_arg = fn_arg[9:].strip()
174 elif is_const and fn_arg.startswith("char *"):
177 fn_ty_arg = "Ljava/lang/String;"
178 fn_arg = fn_arg[6:].strip()
180 ma = var_ty_regex.match(fn_arg)
181 if ma.group(1).strip() in unitary_enums:
182 java_ty = ma.group(1).strip()
184 fn_ty_arg = "Lorg/ldk/enums/" + ma.group(1).strip() + ";"
185 fn_arg = ma.group(2).strip()
186 rust_obj = ma.group(1).strip()
190 java_hu_ty = ma.group(1).strip().replace("LDK", "")
193 fn_arg = ma.group(2).strip()
194 rust_obj = ma.group(1).strip()
197 if fn_arg.startswith(" *") or fn_arg.startswith("*"):
198 fn_arg = fn_arg.replace("*", "").strip()
204 var_is_arr = var_is_arr_regex.match(fn_arg)
205 if var_is_arr is not None or ret_arr_len is not None:
206 assert(not take_by_ptr)
208 java_ty = java_ty + "[]"
209 c_ty = c_ty + "Array"
210 if var_is_arr is not None:
211 if var_is_arr.group(1) == "":
212 return TypeInfo(rust_obj=rust_obj, java_ty=java_ty, java_hu_ty=java_ty, java_fn_ty_arg="[" + fn_ty_arg, c_ty=c_ty,
213 passed_as_ptr=False, is_ptr=False, var_name="arg", arr_len=var_is_arr.group(2), arr_access=arr_access)
214 return TypeInfo(rust_obj=rust_obj, java_ty=java_ty, java_hu_ty=java_ty, java_fn_ty_arg="[" + fn_ty_arg, c_ty=c_ty,
215 passed_as_ptr=False, is_ptr=False, var_name=var_is_arr.group(1), arr_len=var_is_arr.group(2), arr_access=arr_access)
217 if java_hu_ty is None:
219 return TypeInfo(rust_obj=rust_obj, java_ty=java_ty, java_hu_ty=java_hu_ty, java_fn_ty_arg=fn_ty_arg, c_ty=c_ty, passed_as_ptr=is_ptr or take_by_ptr,
220 is_ptr=is_ptr, var_name=fn_arg, arr_len=None, arr_access=None)
222 fn_ptr_regex = re.compile("^extern const ([A-Za-z_0-9\* ]*) \(\*(.*)\)\((.*)\);$")
223 fn_ret_arr_regex = re.compile("(.*) \(\*(.*)\((.*)\)\)\[([0-9]*)\];$")
224 reg_fn_regex = re.compile("([A-Za-z_0-9\* ]* \*?)([a-zA-Z_0-9]*)\((.*)\);$")
227 with open(sys.argv[1]) as in_h:
229 reg_fn = reg_fn_regex.match(line)
230 if reg_fn is not None:
231 if reg_fn.group(2).endswith("_clone"):
232 clone_fns.add(reg_fn.group(2))
234 rty = java_c_types(reg_fn.group(1), None)
235 if rty.rust_obj is not None and reg_fn.group(2) == rty.java_hu_ty + "_new":
236 constructor_fns[rty.rust_obj] = reg_fn.group(3)
238 arr_fn = fn_ret_arr_regex.match(line)
239 if arr_fn is not None:
240 if arr_fn.group(2).endswith("_clone"):
241 clone_fns.add(arr_fn.group(2))
242 # No object constructors return arrays, as then they wouldn't be an object constructor
245 with open(sys.argv[1]) as in_h, open(sys.argv[2], "w") as out_java, open(sys.argv[4], "w") as out_c:
246 def map_type(fn_arg, print_void, ret_arr_len, is_free):
247 ty_info = java_c_types(fn_arg, ret_arr_len)
249 if ty_info.c_ty == "void":
251 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
252 arg_conv = None, arg_conv_name = None, arg_conv_cleanup = None,
253 ret_conv = None, ret_conv_name = None, to_hu_conv = None, from_hu_conv = None)
254 if ty_info.c_ty.endswith("Array"):
255 arr_len = ty_info.arr_len
256 if arr_len is not None:
257 arr_name = ty_info.var_name
260 arr_len = ret_arr_len
261 assert(ty_info.c_ty == "jbyteArray")
262 ret_conv = ("jbyteArray " + arr_name + "_arr = (*_env)->NewByteArray(_env, " + arr_len + ");\n" + "(*_env)->SetByteArrayRegion(_env, " + arr_name + "_arr, 0, " + arr_len + ", ", "")
263 arg_conv_cleanup = None
264 if not arr_len.isdigit():
265 arg_conv = ty_info.rust_obj + " " + arr_name + "_ref;\n"
266 arg_conv = arg_conv + arr_name + "_ref." + ty_info.arr_access + " = (*_env)->GetByteArrayElements (_env, " + arr_name + ", NULL);\n"
267 arg_conv = arg_conv + arr_name + "_ref." + arr_len + " = (*_env)->GetArrayLength (_env, " + arr_name + ");"
268 arg_conv_cleanup = "(*_env)->ReleaseByteArrayElements(_env, " + arr_name + ", (int8_t*)" + arr_name + "_ref." + ty_info.arr_access + ", 0);"
269 arr_access = "." + ty_info.arr_access
270 ret_conv = (ty_info.rust_obj + " " + arr_name + "_var = ", "")
271 ret_conv = (ret_conv[0], ";\njbyteArray " + arr_name + "_arr = (*_env)->NewByteArray(_env, " + arr_name + "_var." + arr_len + ");\n")
272 ret_conv = (ret_conv[0], ret_conv[1] + "(*_env)->SetByteArrayRegion(_env, " + arr_name + "_arr, 0, " + arr_name + "_var." + arr_len + ", " + arr_name + "_var." + ty_info.arr_access + ");")
273 elif ty_info.rust_obj is not None:
274 arg_conv = ty_info.rust_obj + " " + arr_name + "_ref;\n"
275 arg_conv = arg_conv + "CHECK((*_env)->GetArrayLength (_env, " + arr_name + ") == " + arr_len + ");\n"
276 arg_conv = arg_conv + "(*_env)->GetByteArrayRegion (_env, " + arr_name + ", 0, " + arr_len + ", " + arr_name + "_ref." + ty_info.arr_access + ");"
277 ret_conv = (ret_conv[0], "." + ty_info.arr_access + ");")
279 arg_conv = "unsigned char " + arr_name + "_arr[" + arr_len + "];\n"
280 arg_conv = arg_conv + "CHECK((*_env)->GetArrayLength (_env, " + arr_name + ") == " + arr_len + ");\n"
281 arg_conv = arg_conv + "(*_env)->GetByteArrayRegion (_env, " + arr_name + ", 0, " + arr_len + ", " + arr_name + "_arr);\n" + "unsigned char (*" + arr_name + "_ref)[" + arr_len + "] = &" + arr_name + "_arr;"
282 ret_conv = (ret_conv[0] + "*", ");")
283 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
284 arg_conv = arg_conv, arg_conv_name = arr_name + "_ref", arg_conv_cleanup = arg_conv_cleanup,
285 ret_conv = ret_conv, ret_conv_name = arr_name + "_arr", to_hu_conv = None, from_hu_conv = None)
286 elif ty_info.var_name != "":
287 # If we have a parameter name, print it (noting that it may indicate its a pointer)
288 if ty_info.rust_obj is not None:
289 assert(ty_info.passed_as_ptr)
290 opaque_arg_conv = ty_info.rust_obj + " " + ty_info.var_name + "_conv;\n"
291 opaque_arg_conv = opaque_arg_conv + ty_info.var_name + "_conv.inner = (void*)(" + ty_info.var_name + " & (~1));\n"
292 opaque_arg_conv = opaque_arg_conv + ty_info.var_name + "_conv.is_owned = (" + ty_info.var_name + " & 1) || (" + ty_info.var_name + " == 0);"
293 if not ty_info.is_ptr and not is_free:
294 if (ty_info.java_hu_ty + "_clone") in clone_fns:
295 # 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.
296 opaque_arg_conv = opaque_arg_conv + "\nif (" + ty_info.var_name + "_conv.inner != NULL)\n"
297 opaque_arg_conv = opaque_arg_conv + "\t" + ty_info.var_name + "_conv = " + ty_info.java_hu_ty + "_clone(&" + ty_info.var_name + "_conv);"
298 elif ty_info.passed_as_ptr:
299 opaque_arg_conv = opaque_arg_conv + "\n// Warning: we may need a move here but can't clone!"
300 if not ty_info.is_ptr:
301 if ty_info.rust_obj in unitary_enums:
302 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
303 arg_conv = ty_info.rust_obj + " " + ty_info.var_name + "_conv = " + ty_info.rust_obj + "_from_java(_env, " + ty_info.var_name + ");",
304 arg_conv_name = ty_info.var_name + "_conv",
305 arg_conv_cleanup = None,
306 ret_conv = ("jclass " + ty_info.var_name + "_conv = " + ty_info.rust_obj + "_to_java(_env, ", ");"),
307 ret_conv_name = ty_info.var_name + "_conv", to_hu_conv = None, from_hu_conv = None)
308 if ty_info.rust_obj in opaque_structs:
309 ret_conv_suf = ";\nCHECK((((long)" + ty_info.var_name + "_var.inner) & 1) == 0); // We rely on a free low bit, malloc guarantees this.\n"
310 ret_conv_suf = ret_conv_suf + "CHECK((((long)&" + ty_info.var_name + "_var) & 1) == 0); // We rely on a free low bit, pointer alignment guarantees this.\n"
311 ret_conv_suf = ret_conv_suf + "long " + ty_info.var_name + "_ref;\n"
312 ret_conv_suf = ret_conv_suf + "if (" + ty_info.var_name + "_var.is_owned) {\n"
313 ret_conv_suf = ret_conv_suf + "\t" + ty_info.var_name + "_ref = (long)" + ty_info.var_name + "_var.inner | 1;\n"
314 ret_conv_suf = ret_conv_suf + "} else {\n"
315 ret_conv_suf = ret_conv_suf + "\t" + ty_info.var_name + "_ref = (long)&" + ty_info.var_name + "_var;\n"
316 ret_conv_suf = ret_conv_suf + "}"
317 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
318 arg_conv = opaque_arg_conv, arg_conv_name = ty_info.var_name + "_conv", arg_conv_cleanup = None,
319 ret_conv = (ty_info.rust_obj + " " + ty_info.var_name + "_var = ", ret_conv_suf),
320 ret_conv_name = ty_info.var_name + "_ref", to_hu_conv = ("new " + ty_info.java_hu_ty + "(null, ", ")"),
321 from_hu_conv = (ty_info.var_name + " == null ? 0 : " + ty_info.var_name + ".ptr & ~1", "this.ptrs_to.add(" + ty_info.var_name + ")"))
322 base_conv = ty_info.rust_obj + " " + ty_info.var_name + "_conv = *(" + ty_info.rust_obj + "*)" + ty_info.var_name + ";";
323 if ty_info.rust_obj in trait_structs:
325 base_conv = base_conv + "\nif (" + ty_info.var_name + "_conv.free == " + ty_info.rust_obj + "_JCalls_free) {\n"
326 base_conv = base_conv + "\t// If this_arg is a JCalls struct, then we need to increment the refcnt in it.\n"
327 base_conv = base_conv + "\t" + ty_info.rust_obj + "_JCalls_clone(" + ty_info.var_name + "_conv.this_arg);\n}"
329 base_conv = base_conv + "\n" + "FREE((void*)" + ty_info.var_name + ");"
330 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
331 arg_conv = base_conv, arg_conv_name = ty_info.var_name + "_conv", arg_conv_cleanup = None,
332 ret_conv = ("CANT PASS TRAIT TO Java?", ""), ret_conv_name = "NO CONV POSSIBLE",
333 to_hu_conv = ("DUMMY", ""), from_hu_conv = (ty_info.var_name + " == null ? 0 : " + ty_info.var_name + ".ptr", "this.ptrs_to.add(" + ty_info.var_name + ")"))
334 if ty_info.rust_obj != "LDKu8slice":
335 # Don't bother free'ing slices passed in - Rust doesn't auto-free the
336 # underlying unlike Vecs, and it gives Java more freedom.
337 base_conv = base_conv + "\nFREE((void*)" + ty_info.var_name + ");";
338 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
339 arg_conv = base_conv, arg_conv_name = ty_info.var_name + "_conv", arg_conv_cleanup = None,
340 ret_conv = ("long " + ty_info.var_name + "_ref = (long)&", ";"), ret_conv_name = ty_info.var_name + "_ref",
341 to_hu_conv = ("TODO 1", ""), from_hu_conv = None)
344 if ty_info.rust_obj in opaque_structs:
345 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
346 arg_conv = opaque_arg_conv, arg_conv_name = "&" + ty_info.var_name + "_conv", arg_conv_cleanup = None,
347 ret_conv = None, ret_conv_name = None, to_hu_conv = ("TODO 2", ""),
348 from_hu_conv = (ty_info.var_name + " == null ? 0 : " + ty_info.var_name + ".ptr & ~1", "this.ptrs_to.add(" + ty_info.var_name + ")")) # its a pointer, no conv needed
349 elif ty_info.rust_obj in trait_structs:
350 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
351 arg_conv = ty_info.rust_obj + "* " + ty_info.var_name + "_conv = (" + ty_info.rust_obj + "*)" + ty_info.var_name + ";",
352 arg_conv_name = ty_info.var_name + "_conv", arg_conv_cleanup = None,
353 ret_conv = None, ret_conv_name = None, to_hu_conv = ("TODO 2.5", ""),
354 from_hu_conv = (ty_info.var_name + " == null ? 0 : " + ty_info.var_name + ".ptr", "this.ptrs_to.add(" + ty_info.var_name + ")")) # its a pointer, no conv needed
355 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
356 arg_conv = ty_info.rust_obj + "* " + ty_info.var_name + "_conv = (" + ty_info.rust_obj + "*)" + ty_info.var_name + ";",
357 arg_conv_name = ty_info.var_name + "_conv", arg_conv_cleanup = None,
358 ret_conv = None, ret_conv_name = None, to_hu_conv = ("TODO 3", ""), from_hu_conv = None) # its a pointer, no conv needed
360 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
361 arg_conv = None, arg_conv_name = ty_info.var_name, arg_conv_cleanup = None,
362 ret_conv = None, ret_conv_name = None, to_hu_conv = ("TODO 4", ""), from_hu_conv = None)
363 elif ty_info.java_ty == "String":
364 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
365 arg_conv = None, arg_conv_name = None, arg_conv_cleanup = None,
366 ret_conv = ("jstring " + ty_info.var_name + "_conv = (*_env)->NewStringUTF(_env, ", ");"), ret_conv_name = ty_info.var_name + "_conv",
367 to_hu_conv = ("TODO 5", ""), from_hu_conv = None)
369 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
370 arg_conv = None, arg_conv_name = ty_info.var_name, arg_conv_cleanup = None,
371 ret_conv = None, ret_conv_name = None, to_hu_conv = ("TODO 6", ""), from_hu_conv = None)
373 # We don't have a parameter name, and want one, just call it arg
374 if ty_info.rust_obj is not None:
375 assert(not is_free or ty_info.rust_obj not in opaque_structs);
376 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
377 arg_conv = ty_info.rust_obj + " arg_conv = *(" + ty_info.rust_obj + "*)arg;\nFREE((void*)arg);",
378 arg_conv_name = "arg_conv", arg_conv_cleanup = None,
379 ret_conv = None, ret_conv_name = None, to_hu_conv = ("TODO 7", ""), from_hu_conv = None)
382 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
383 arg_conv = None, arg_conv_name = "arg", arg_conv_cleanup = None,
384 ret_conv = None, ret_conv_name = None, to_hu_conv = ("TODO 8", ""), from_hu_conv = None)
386 # We don't have a parameter name, and don't want one (cause we're returning)
387 if ty_info.rust_obj is not None:
388 if not ty_info.is_ptr:
389 if ty_info.rust_obj in unitary_enums:
390 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
391 arg_conv = ty_info.rust_obj + " ret = " + ty_info.rust_obj + "_from_java(_env, " + ty_info.var_name + ");",
392 arg_conv_name = "ret", arg_conv_cleanup = None,
393 ret_conv = ("jclass ret = " + ty_info.rust_obj + "_to_java(_env, ", ");"), ret_conv_name = "ret",
394 to_hu_conv = ("TODO 9", ""), from_hu_conv = None)
395 if ty_info.rust_obj in opaque_structs:
396 # If we're returning a newly-allocated struct, we don't want Rust to ever
397 # free, instead relying on the Java GC to lose the ref. We undo this in
398 # any _free function.
399 # To avoid any issues, we first assert that the incoming object is non-ref.
400 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
401 ret_conv = (ty_info.rust_obj + " ret = ", ";"),
402 ret_conv_name = "((long)ret.inner) | (ret.is_owned ? 1 : 0)",
403 arg_conv = None, arg_conv_name = None, arg_conv_cleanup = None,
404 to_hu_conv = ("new " + ty_info.java_hu_ty + "(null, ", ")"), from_hu_conv = None)
405 elif ty_info.rust_obj in trait_structs:
406 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
407 ret_conv = (ty_info.rust_obj + "* ret = MALLOC(sizeof(" + ty_info.rust_obj + "), \"" + ty_info.rust_obj + "\");\n*ret = ", ";"),
408 ret_conv_name = "(long)ret",
409 arg_conv = None, arg_conv_name = None, arg_conv_cleanup = None,
410 to_hu_conv = ("new " + ty_info.java_hu_ty + "(null, ", ");\nret.ptrs_to.add(this)"), from_hu_conv = None)
412 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
413 ret_conv = (ty_info.rust_obj + "* ret = MALLOC(sizeof(" + ty_info.rust_obj + "), \"" + ty_info.rust_obj + "\");\n*ret = ", ";"),
414 ret_conv_name = "(long)ret",
415 arg_conv = None, arg_conv_name = None, arg_conv_cleanup = None,
416 to_hu_conv = ("TODO b", ""), from_hu_conv = None)
417 elif ty_info.rust_obj in trait_structs:
418 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
419 ret_conv = ("long ret = (long)", ";"), ret_conv_name = "ret",
420 arg_conv = None, arg_conv_name = None, arg_conv_cleanup = None,
421 to_hu_conv = ("new " + ty_info.java_hu_ty + "(null, ", ");\nret.ptrs_to.add(this)"), from_hu_conv = None)
423 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
424 ret_conv = ("long ret = (long)", ";"), ret_conv_name = "ret",
425 arg_conv = None, arg_conv_name = None, arg_conv_cleanup = None,
426 to_hu_conv = ("TODO c", ""), from_hu_conv = None)
428 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
429 arg_conv = None, arg_conv_name = None, arg_conv_cleanup = None,
430 ret_conv = None, ret_conv_name = None,
431 to_hu_conv = None, from_hu_conv = None)
433 def map_fn(line, re_match, ret_arr_len, c_call_string):
434 out_java.write("\t// " + line)
435 out_java.write("\tpublic static native ")
436 out_c.write("JNIEXPORT ")
438 is_free = re_match.group(2).endswith("_free")
439 struct_meth = re_match.group(2).split("_")[0]
441 ret_info = map_type(re_match.group(1), True, ret_arr_len, False)
444 if ret_info.ret_conv is not None:
445 ret_conv_pfx, ret_conv_sfx = ret_info.ret_conv
447 out_java.write(" " + re_match.group(2) + "(")
448 out_c.write(" JNICALL Java_org_ldk_impl_bindings_" + re_match.group(2).replace('_', '_1') + "(JNIEnv * _env, jclass _b")
451 default_constructor_args = {}
453 args_known = not ret_info.passed_as_ptr or ret_info.rust_obj in opaque_structs or ret_info.rust_obj in trait_structs
454 for idx, arg in enumerate(re_match.group(3).split(',')):
459 arg_conv_info = map_type(arg, False, None, is_free)
460 if arg_conv_info.c_ty != "void":
461 arg_conv_info.print_ty()
462 arg_conv_info.print_name()
463 if arg_conv_info.arg_name == "this_arg":
465 if arg_conv_info.passed_as_ptr and not arg_conv_info.rust_obj in opaque_structs:
466 if not arg_conv_info.rust_obj in trait_structs and not arg_conv_info.rust_obj in unitary_enums:
468 if arg_conv_info.arg_conv is not None and "Warning" in arg_conv_info.arg_conv:
469 if arg_conv_info.rust_obj in constructor_fns:
471 for explode_arg in constructor_fns[arg_conv_info.rust_obj].split(','):
472 explode_arg_conv = map_type(explode_arg, False, None, False)
473 if explode_arg_conv.c_ty == "void":
474 # We actually want to handle this case, but for now its only used in NetGraphMsgHandler::new()
475 # which ends up resulting in a redundant constructor - both without arguments for the NetworkGraph.
477 assert explode_arg_conv.arg_name != "this_arg"
478 if explode_arg_conv.passed_as_ptr and not explode_arg_conv.rust_obj in trait_structs:
480 if not arg_conv_info.arg_name in default_constructor_args:
481 default_constructor_args[arg_conv_info.arg_name] = []
482 default_constructor_args[arg_conv_info.arg_name].append(explode_arg_conv)
485 arg_names.append(arg_conv_info)
487 out_java_struct = None
488 if ("LDK" + struct_meth in opaque_structs or "LDK" + struct_meth in trait_structs) and not is_free:
489 out_java_struct = open(sys.argv[3] + "/structs/" + struct_meth + ".java", "a")
491 out_java_struct.write("\t// Skipped " + re_match.group(2) + "\n")
492 out_java_struct.close()
493 out_java_struct = None
495 out_java_struct.write("\tpublic ")
496 meth_n = re_match.group(2)[len(struct_meth) + 1:]
497 if ret_info.rust_obj == "LDK" + struct_meth:
498 out_java_struct.write(struct_meth + "(")
500 out_java_struct.write(ret_info.java_hu_ty + " " + meth_n + "(")
501 for idx, arg in enumerate(arg_names):
503 if not takes_self or idx > 1:
504 out_java_struct.write(", ")
505 if arg.java_ty != "void" and arg.arg_name != "this_arg":
506 if arg.arg_name in default_constructor_args:
507 for explode_idx, explode_arg in enumerate(default_constructor_args[arg.arg_name]):
509 out_java_struct.write(", ")
510 assert explode_arg.rust_obj in opaque_structs or explode_arg.rust_obj in trait_structs
511 out_java_struct.write(explode_arg.java_hu_ty + " " + arg.arg_name + "_" + explode_arg.arg_name)
513 out_java_struct.write(arg.java_hu_ty + " " + arg.arg_name)
516 out_java.write(");\n")
518 if out_java_struct is not None:
519 out_java_struct.write(") {\n")
521 for info in arg_names:
522 if info.arg_conv is not None:
523 out_c.write("\t" + info.arg_conv.replace('\n', "\n\t") + "\n")
525 if ret_info.ret_conv is not None:
526 out_c.write("\t" + ret_conv_pfx.replace('\n', '\n\t'))
527 elif ret_info.c_ty != "void":
528 out_c.write("\t" + ret_info.c_ty + " ret_val = ")
532 if c_call_string is None:
533 out_c.write(re_match.group(2) + "(")
535 out_c.write(c_call_string)
536 for idx, info in enumerate(arg_names):
537 if info.arg_conv_name is not None:
540 elif c_call_string is not None:
542 out_c.write(info.arg_conv_name)
544 if ret_info.ret_conv is not None:
545 out_c.write(ret_conv_sfx.replace('\n', '\n\t'))
548 for info in arg_names:
549 if info.arg_conv_cleanup is not None:
550 out_c.write("\n\t" + info.arg_conv_cleanup.replace("\n", "\n\t"))
551 if ret_info.ret_conv is not None:
552 out_c.write("\n\treturn " + ret_info.ret_conv_name + ";")
553 elif ret_info.c_ty != "void":
554 out_c.write("\n\treturn ret_val;")
555 out_c.write("\n}\n\n")
556 if out_java_struct is not None:
557 out_java_struct.write("\t\t")
558 if ret_info.rust_obj == "LDK" + struct_meth:
559 out_java_struct.write("super(")
560 elif ret_info.java_ty != "void" and not ret_info.passed_as_ptr:
561 out_java_struct.write(ret_info.java_ty + " ret = ")
562 elif ret_info.java_ty != "void":
563 out_java_struct.write(ret_info.java_hu_ty + " ret = ")
564 if ret_info.to_hu_conv is not None:
565 out_java_struct.write(ret_info.to_hu_conv[0])
566 out_java_struct.write("bindings." + re_match.group(2) + "(")
567 for idx, info in enumerate(arg_names):
569 out_java_struct.write(", ")
570 if info.arg_name == "this_arg":
571 out_java_struct.write("this.ptr")
572 elif info.arg_name in default_constructor_args:
573 out_java_struct.write("bindings." + info.java_hu_ty + "_new(")
574 for explode_idx, explode_arg in enumerate(default_constructor_args[info.arg_name]):
576 out_java_struct.write(", ")
577 expl_arg_name = info.arg_name + "_" + explode_arg.arg_name
578 out_java_struct.write(explode_arg.from_hu_conv[0].replace(explode_arg.arg_name, expl_arg_name))
579 out_java_struct.write(")")
580 elif info.from_hu_conv is not None:
581 out_java_struct.write(info.from_hu_conv[0])
583 out_java_struct.write(info.arg_name)
584 out_java_struct.write(")")
585 if ret_info.to_hu_conv is not None:
586 out_java_struct.write(ret_info.to_hu_conv[1].replace("\n", "\n\t\t") + ";\n")
588 out_java_struct.write(";\n")
590 for info in arg_names:
591 if info.arg_name == "this_arg":
593 elif info.arg_name in default_constructor_args:
594 for explode_arg in default_constructor_args[info.arg_name]:
595 expl_arg_name = info.arg_name + "_" + explode_arg.arg_name
596 out_java_struct.write("\t\t" + explode_arg.from_hu_conv[1].replace(explode_arg.arg_name, expl_arg_name) + ";\n")
597 elif info.from_hu_conv is not None and info.from_hu_conv[1] != "":
598 out_java_struct.write("\t\t" + info.from_hu_conv[1] + ";\n")
600 if ret_info.java_ty != "void" and ret_info.rust_obj != "LDK" + struct_meth:
601 out_java_struct.write("\t\treturn ret;\n")
602 out_java_struct.write("\t}\n\n")
603 out_java_struct.close()
605 def map_unitary_enum(struct_name, field_lines):
606 with open(sys.argv[3] + "/enums/" + struct_name + ".java", "w") as out_java_enum:
607 out_java_enum.write("package org.ldk.enums;\n\n")
608 unitary_enums.add(struct_name)
609 out_c.write("static inline " + struct_name + " " + struct_name + "_from_java(JNIEnv *env, jclass val) {\n")
610 out_c.write("\tswitch ((*env)->CallIntMethod(env, val, ordinal_meth)) {\n")
612 for idx, struct_line in enumerate(field_lines):
614 out_java_enum.write("public enum " + struct_name + " {\n")
615 elif idx == len(field_lines) - 3:
616 assert(struct_line.endswith("_Sentinel,"))
617 elif idx == len(field_lines) - 2:
618 out_java_enum.write("\t; static native void init();\n")
619 out_java_enum.write("\tstatic { init(); }\n")
620 out_java_enum.write("}")
621 out_java.write("\tstatic { " + struct_name + ".values(); /* Force enum statics to run */ }\n")
622 elif idx == len(field_lines) - 1:
623 assert(struct_line == "")
625 out_java_enum.write(struct_line + "\n")
626 out_c.write("\t\tcase %d: return %s;\n" % (ord_v, struct_line.strip().strip(",")))
629 out_c.write("\tabort();\n")
633 out_c.write("static jclass " + struct_name + "_class = NULL;\n")
634 for idx, struct_line in enumerate(field_lines):
635 if idx > 0 and idx < len(field_lines) - 3:
636 variant = struct_line.strip().strip(",")
637 out_c.write("static jfieldID " + struct_name + "_" + variant + " = NULL;\n")
638 out_c.write("JNIEXPORT void JNICALL Java_org_ldk_enums_" + struct_name.replace("_", "_1") + "_init (JNIEnv * env, jclass clz) {\n")
639 out_c.write("\t" + struct_name + "_class = (*env)->NewGlobalRef(env, clz);\n")
640 out_c.write("\tCHECK(" + struct_name + "_class != NULL);\n")
641 for idx, struct_line in enumerate(field_lines):
642 if idx > 0 and idx < len(field_lines) - 3:
643 variant = struct_line.strip().strip(",")
644 out_c.write("\t" + struct_name + "_" + variant + " = (*env)->GetStaticFieldID(env, " + struct_name + "_class, \"" + variant + "\", \"Lorg/ldk/enums/" + struct_name + ";\");\n")
645 out_c.write("\tCHECK(" + struct_name + "_" + variant + " != NULL);\n")
647 out_c.write("static inline jclass " + struct_name + "_to_java(JNIEnv *env, " + struct_name + " val) {\n")
648 out_c.write("\tswitch (val) {\n")
649 for idx, struct_line in enumerate(field_lines):
650 if idx > 0 and idx < len(field_lines) - 3:
651 variant = struct_line.strip().strip(",")
652 out_c.write("\t\tcase " + variant + ":\n")
653 out_c.write("\t\t\treturn (*env)->GetStaticObjectField(env, " + struct_name + "_class, " + struct_name + "_" + variant + ");\n")
655 out_c.write("\t\tdefault: abort();\n")
659 def map_complex_enum(struct_name, union_enum_items):
660 tag_field_lines = union_enum_items["field_lines"]
661 init_meth_jty_strs = {}
662 for idx, struct_line in enumerate(tag_field_lines):
664 out_java.write("\tpublic static class " + struct_name + " {\n")
665 out_java.write("\t\tprivate " + struct_name + "() {}\n")
666 elif idx == len(tag_field_lines) - 3:
667 assert(struct_line.endswith("_Sentinel,"))
668 elif idx == len(tag_field_lines) - 2:
669 out_java.write("\t\tstatic native void init();\n")
670 out_java.write("\t}\n")
671 elif idx == len(tag_field_lines) - 1:
672 assert(struct_line == "")
674 var_name = struct_line.strip(' ,')[len(struct_name) + 1:]
675 out_java.write("\t\tpublic final static class " + var_name + " extends " + struct_name + " {\n")
676 out_c.write("static jclass " + struct_name + "_" + var_name + "_class = NULL;\n")
677 out_c.write("static jmethodID " + struct_name + "_" + var_name + "_meth = NULL;\n")
678 init_meth_jty_str = ""
679 init_meth_params = ""
681 if "LDK" + var_name in union_enum_items:
682 enum_var_lines = union_enum_items["LDK" + var_name]
683 for idx, field in enumerate(enum_var_lines):
684 if idx != 0 and idx < len(enum_var_lines) - 2:
685 field_ty = java_c_types(field.strip(' ;'), None)
686 out_java.write("\t\t\tpublic " + field_ty.java_ty + " " + field_ty.var_name + ";\n")
687 init_meth_jty_str = init_meth_jty_str + field_ty.java_fn_ty_arg
689 init_meth_params = init_meth_params + ", "
690 init_meth_params = init_meth_params + field_ty.java_ty + " " + field_ty.var_name
691 init_meth_body = init_meth_body + "this." + field_ty.var_name + " = " + field_ty.var_name + "; "
692 out_java.write("\t\t\t" + var_name + "(" + init_meth_params + ") { ")
693 out_java.write(init_meth_body)
694 out_java.write("}\n")
695 out_java.write("\t\t}\n")
696 init_meth_jty_strs[var_name] = init_meth_jty_str
697 out_java.write("\tstatic { " + struct_name + ".init(); }\n")
698 out_java.write("\tpublic static native " + struct_name + " " + struct_name + "_ref_from_ptr(long ptr);\n");
700 out_c.write("JNIEXPORT void JNICALL Java_org_ldk_impl_bindings_00024" + struct_name.replace("_", "_1") + "_init (JNIEnv * env, jclass _a) {\n")
701 for idx, struct_line in enumerate(tag_field_lines):
702 if idx != 0 and idx < len(tag_field_lines) - 3:
703 var_name = struct_line.strip(' ,')[len(struct_name) + 1:]
704 out_c.write("\t" + struct_name + "_" + var_name + "_class =\n")
705 out_c.write("\t\t(*env)->NewGlobalRef(env, (*env)->FindClass(env, \"Lorg/ldk/impl/bindings$" + struct_name + "$" + var_name + ";\"));\n")
706 out_c.write("\tCHECK(" + struct_name + "_" + var_name + "_class != NULL);\n")
707 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")
708 out_c.write("\tCHECK(" + struct_name + "_" + var_name + "_meth != NULL);\n")
710 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")
711 out_c.write("\t" + struct_name + " *obj = (" + struct_name + "*)ptr;\n")
712 out_c.write("\tswitch(obj->tag) {\n")
713 for idx, struct_line in enumerate(tag_field_lines):
714 if idx != 0 and idx < len(tag_field_lines) - 3:
715 var_name = struct_line.strip(' ,')[len(struct_name) + 1:]
716 out_c.write("\t\tcase " + struct_name + "_" + var_name + ": {\n")
718 if "LDK" + var_name in union_enum_items:
719 enum_var_lines = union_enum_items["LDK" + var_name]
720 for idx, field in enumerate(enum_var_lines):
721 if idx != 0 and idx < len(enum_var_lines) - 2:
722 field_map = map_type(field.strip(' ;'), False, None, False)
723 if field_map.ret_conv is not None:
724 out_c.write("\t\t\t" + field_map.ret_conv[0].replace("\n", "\n\t\t\t"))
725 out_c.write("obj->" + camel_to_snake(var_name) + "." + field_map.arg_name)
726 out_c.write(field_map.ret_conv[1].replace("\n", "\n\t\t\t") + "\n")
727 c_params_text = c_params_text + ", " + field_map.ret_conv_name
729 c_params_text = c_params_text + ", obj->" + camel_to_snake(var_name) + "." + field_map.arg_name
730 out_c.write("\t\t\treturn (*_env)->NewObject(_env, " + struct_name + "_" + var_name + "_class, " + struct_name + "_" + var_name + "_meth" + c_params_text + ");\n")
731 out_c.write("\t\t}\n")
732 out_c.write("\t\tdefault: abort();\n")
733 out_c.write("\t}\n}\n")
735 def map_trait(struct_name, field_var_lines, trait_fn_lines):
736 with open(sys.argv[3] + "/structs/" + struct_name.replace("LDK","") + ".java", "w") as out_java_trait:
737 out_c.write("typedef struct " + struct_name + "_JCalls {\n")
738 out_c.write("\tatomic_size_t refcnt;\n")
739 out_c.write("\tJavaVM *vm;\n")
740 out_c.write("\tjweak o;\n")
741 for var_line in field_var_lines:
742 if var_line.group(1) in trait_structs:
743 out_c.write("\t" + var_line.group(1) + "_JCalls* " + var_line.group(2) + ";\n")
744 for fn_line in trait_fn_lines:
745 if fn_line.group(2) != "free" and fn_line.group(2) != "clone":
746 out_c.write("\tjmethodID " + fn_line.group(2) + "_meth;\n")
747 out_c.write("} " + struct_name + "_JCalls;\n")
749 out_java_trait.write("package org.ldk.structs;\n\n")
750 out_java_trait.write("import org.ldk.impl.bindings;\n\n")
751 out_java_trait.write("import org.ldk.enums.*;\n\n")
752 out_java_trait.write("public class " + struct_name.replace("LDK","") + " extends CommonBase {\n")
753 out_java_trait.write("\t" + struct_name.replace("LDK", "") + "(Object _dummy, long ptr) { super(ptr); }\n")
754 out_java_trait.write("\tpublic " + struct_name.replace("LDK", "") + "(bindings." + struct_name + " arg") # XXX: Should be priv
755 for var_line in field_var_lines:
756 if var_line.group(1) in trait_structs:
757 out_java_trait.write(", bindings." + var_line.group(1) + " " + var_line.group(2))
758 out_java_trait.write(") {\n")
759 out_java_trait.write("\t\tsuper(bindings." + struct_name + "_new(arg")
760 for var_line in field_var_lines:
761 if var_line.group(1) in trait_structs:
762 out_java_trait.write(", " + var_line.group(2))
763 out_java_trait.write("));\n")
764 out_java_trait.write("\t\tthis.ptrs_to.add(arg);\n")
765 out_java_trait.write("\t}\n")
766 out_java_trait.write("\t@Override @SuppressWarnings(\"deprecation\")\n")
767 out_java_trait.write("\tprotected void finalize() throws Throwable {\n")
768 out_java_trait.write("\t\tbindings." + struct_name.replace("LDK","") + "_free(ptr); super.finalize();\n")
769 out_java_trait.write("\t}\n\n")
771 out_java.write("\tpublic interface " + struct_name + " {\n")
773 for fn_line in trait_fn_lines:
774 java_meth_descr = "("
775 if fn_line.group(2) != "free" and fn_line.group(2) != "clone":
776 ret_ty_info = map_type(fn_line.group(1), True, None, False)
778 out_java.write("\t\t " + ret_ty_info.java_ty + " " + fn_line.group(2) + "(")
779 is_const = fn_line.group(3) is not None
780 out_c.write(fn_line.group(1) + fn_line.group(2) + "_jcall(")
782 out_c.write("const void* this_arg")
784 out_c.write("void* this_arg")
787 for idx, arg in enumerate(fn_line.group(4).split(',')):
793 arg_conv_info = map_type(arg, True, None, False)
794 out_c.write(arg.strip())
795 out_java.write(arg_conv_info.java_ty + " " + arg_conv_info.arg_name)
796 arg_names.append(arg_conv_info)
797 java_meth_descr = java_meth_descr + arg_conv_info.java_fn_ty_arg
798 java_meth_descr = java_meth_descr + ")" + ret_ty_info.java_fn_ty_arg
799 java_meths.append(java_meth_descr)
801 out_java.write(");\n")
803 out_c.write("\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n")
804 out_c.write("\tJNIEnv *_env;\n")
805 out_c.write("\tDO_ASSERT((*j_calls->vm)->GetEnv(j_calls->vm, (void**)&_env, JNI_VERSION_1_8) == JNI_OK);\n")
807 for arg_info in arg_names:
808 if arg_info.ret_conv is not None:
809 out_c.write("\t" + arg_info.ret_conv[0].replace('\n', '\n\t'));
810 out_c.write(arg_info.arg_name)
811 out_c.write(arg_info.ret_conv[1].replace('\n', '\n\t') + "\n")
813 out_c.write("\tjobject obj = (*_env)->NewLocalRef(_env, j_calls->o);\n\tCHECK(obj != NULL);\n")
814 if ret_ty_info.c_ty.endswith("Array"):
815 assert(ret_ty_info.c_ty == "jbyteArray")
816 out_c.write("\tjbyteArray ret = (*_env)->CallObjectMethod(_env, obj, j_calls->" + fn_line.group(2) + "_meth")
817 elif not ret_ty_info.passed_as_ptr:
818 out_c.write("\treturn (*_env)->Call" + ret_ty_info.java_ty.title() + "Method(_env, obj, j_calls->" + fn_line.group(2) + "_meth")
820 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");
822 for arg_info in arg_names:
823 if arg_info.ret_conv is not None:
824 out_c.write(", " + arg_info.ret_conv_name)
826 out_c.write(", " + arg_info.arg_name)
828 if ret_ty_info.arg_conv is not None:
829 out_c.write("\t" + ret_ty_info.arg_conv.replace("\n", "\n\t").replace("arg", "ret") + "\n\treturn " + ret_ty_info.arg_conv_name.replace("arg", "ret") + ";\n")
831 if ret_ty_info.passed_as_ptr:
832 out_c.write("\t" + fn_line.group(1).strip() + " res = *ret;\n")
833 out_c.write("\tFREE(ret);\n")
834 out_c.write("\treturn res;\n")
836 elif fn_line.group(2) == "free":
837 out_c.write("static void " + struct_name + "_JCalls_free(void* this_arg) {\n")
838 out_c.write("\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n")
839 out_c.write("\tif (atomic_fetch_sub_explicit(&j_calls->refcnt, 1, memory_order_acquire) == 1) {\n")
840 out_c.write("\t\tJNIEnv *env;\n")
841 out_c.write("\t\tDO_ASSERT((*j_calls->vm)->GetEnv(j_calls->vm, (void**)&env, JNI_VERSION_1_8) == JNI_OK);\n")
842 out_c.write("\t\t(*env)->DeleteWeakGlobalRef(env, j_calls->o);\n")
843 out_c.write("\t\tFREE(j_calls);\n")
844 out_c.write("\t}\n}\n")
846 # Write out a clone function whether we need one or not, as we use them in moving to rust
847 out_c.write("static void* " + struct_name + "_JCalls_clone(const void* this_arg) {\n")
848 out_c.write("\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n")
849 out_c.write("\tatomic_fetch_add_explicit(&j_calls->refcnt, 1, memory_order_release);\n")
850 for var_line in field_var_lines:
851 if var_line.group(1) in trait_structs:
852 out_c.write("\tatomic_fetch_add_explicit(&j_calls->" + var_line.group(2) + "->refcnt, 1, memory_order_release);\n")
853 out_c.write("\treturn (void*) this_arg;\n")
856 out_java.write("\t}\n")
858 out_java.write("\tpublic static native long " + struct_name + "_new(" + struct_name + " impl")
859 out_c.write("static inline " + struct_name + " " + struct_name + "_init (JNIEnv * env, jclass _a, jobject o")
860 for var_line in field_var_lines:
861 if var_line.group(1) in trait_structs:
862 out_java.write(", " + var_line.group(1) + " " + var_line.group(2))
863 out_c.write(", jobject " + var_line.group(2))
864 out_java.write(");\n")
867 out_c.write("\tjclass c = (*env)->GetObjectClass(env, o);\n")
868 out_c.write("\tCHECK(c != NULL);\n")
869 out_c.write("\t" + struct_name + "_JCalls *calls = MALLOC(sizeof(" + struct_name + "_JCalls), \"" + struct_name + "_JCalls\");\n")
870 out_c.write("\tatomic_init(&calls->refcnt, 1);\n")
871 out_c.write("\tDO_ASSERT((*env)->GetJavaVM(env, &calls->vm) == 0);\n")
872 out_c.write("\tcalls->o = (*env)->NewWeakGlobalRef(env, o);\n")
873 for (fn_line, java_meth_descr) in zip(trait_fn_lines, java_meths):
874 if fn_line.group(2) != "free" and fn_line.group(2) != "clone":
875 out_c.write("\tcalls->" + fn_line.group(2) + "_meth = (*env)->GetMethodID(env, c, \"" + fn_line.group(2) + "\", \"" + java_meth_descr + "\");\n")
876 out_c.write("\tCHECK(calls->" + fn_line.group(2) + "_meth != NULL);\n")
877 out_c.write("\n\t" + struct_name + " ret = {\n")
878 out_c.write("\t\t.this_arg = (void*) calls,\n")
879 for fn_line in trait_fn_lines:
880 if fn_line.group(2) != "free" and fn_line.group(2) != "clone":
881 out_c.write("\t\t." + fn_line.group(2) + " = " + fn_line.group(2) + "_jcall,\n")
882 elif fn_line.group(2) == "free":
883 out_c.write("\t\t.free = " + struct_name + "_JCalls_free,\n")
885 clone_fns.add(struct_name + "_clone")
886 out_c.write("\t\t.clone = " + struct_name + "_JCalls_clone,\n")
887 for var_line in field_var_lines:
888 if var_line.group(1) in trait_structs:
889 out_c.write("\t\t." + var_line.group(2) + " = " + var_line.group(1) + "_init(env, _a, " + var_line.group(2) + "),\n")
890 out_c.write("\t};\n")
891 for var_line in field_var_lines:
892 if var_line.group(1) in trait_structs:
893 out_c.write("\tcalls->" + var_line.group(2) + " = ret." + var_line.group(2) + ".this_arg;\n")
894 out_c.write("\treturn ret;\n")
897 out_c.write("JNIEXPORT long JNICALL Java_org_ldk_impl_bindings_" + struct_name.replace("_", "_1") + "_1new (JNIEnv * env, jclass _a, jobject o")
898 for var_line in field_var_lines:
899 if var_line.group(1) in trait_structs:
900 out_c.write(", jobject " + var_line.group(2))
902 out_c.write("\t" + struct_name + " *res_ptr = MALLOC(sizeof(" + struct_name + "), \"" + struct_name + "\");\n")
903 out_c.write("\t*res_ptr = " + struct_name + "_init(env, _a, o")
904 for var_line in field_var_lines:
905 if var_line.group(1) in trait_structs:
906 out_c.write(", " + var_line.group(2))
908 out_c.write("\treturn (long)res_ptr;\n")
911 out_java.write("\tpublic static native " + struct_name + " " + struct_name + "_get_obj_from_jcalls(long val);\n")
912 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")
913 out_c.write("\tjobject ret = (*env)->NewLocalRef(env, ((" + struct_name + "_JCalls*)val)->o);\n")
914 out_c.write("\tCHECK(ret != NULL);\n")
915 out_c.write("\treturn ret;\n")
918 for fn_line in trait_fn_lines:
919 # For now, just disable enabling the _call_log - we don't know how to inverse-map String
920 is_log = fn_line.group(2) == "log" and struct_name == "LDKLogger"
921 if fn_line.group(2) != "free" and fn_line.group(2) != "clone" and fn_line.group(2) != "eq" and not is_log:
922 dummy_line = fn_line.group(1) + struct_name.replace("LDK", "") + "_" + fn_line.group(2) + " " + struct_name + "* this_arg" + fn_line.group(4) + "\n"
923 map_fn(dummy_line, re.compile("([A-Za-z_0-9]*) *([A-Za-z_0-9]*) *(.*)").match(dummy_line), None, "(this_arg_conv->" + fn_line.group(2) + ")(this_arg_conv->this_arg")
925 out_c.write("""#include \"org_ldk_impl_bindings.h\"
926 #include <rust_types.h>
927 #include <lightning.h>
929 #include <stdatomic.h>
932 if sys.argv[4] == "false":
933 out_c.write("#define MALLOC(a, _) malloc(a)\n")
934 out_c.write("#define FREE free\n")
935 out_c.write("#define DO_ASSERT(a) (void)(a)\n")
936 out_c.write("#define CHECK(a)\n")
938 out_c.write("""#include <assert.h>
939 // Always run a, then assert it is true:
940 #define DO_ASSERT(a) do { bool _assert_val = (a); assert(_assert_val); } while(0)
941 // Assert a is true or do nothing
942 #define CHECK(a) DO_ASSERT(a)
944 // Running a leak check across all the allocations and frees of the JDK is a mess,
945 // so instead we implement our own naive leak checker here, relying on the -wrap
946 // linker option to wrap malloc/calloc/realloc/free, tracking everyhing allocated
947 // and free'd in Rust or C across the generated bindings shared library.
949 #include <execinfo.h>
951 static mtx_t allocation_mtx;
953 void __attribute__((constructor)) init_mtx() {
954 DO_ASSERT(mtx_init(&allocation_mtx, mtx_plain) == thrd_success);
958 typedef struct allocation {
959 struct allocation* next;
961 const char* struct_name;
965 static allocation* allocation_ll = NULL;
967 void* __real_malloc(size_t len);
968 void* __real_calloc(size_t nmemb, size_t len);
969 static void new_allocation(void* res, const char* struct_name) {
970 allocation* new_alloc = __real_malloc(sizeof(allocation));
971 new_alloc->ptr = res;
972 new_alloc->struct_name = struct_name;
973 new_alloc->bt_len = backtrace(new_alloc->bt, BT_MAX);
974 DO_ASSERT(mtx_lock(&allocation_mtx) == thrd_success);
975 new_alloc->next = allocation_ll;
976 allocation_ll = new_alloc;
977 DO_ASSERT(mtx_unlock(&allocation_mtx) == thrd_success);
979 static void* MALLOC(size_t len, const char* struct_name) {
980 void* res = __real_malloc(len);
981 new_allocation(res, struct_name);
984 void __real_free(void* ptr);
985 static void alloc_freed(void* ptr) {
986 allocation* p = NULL;
987 DO_ASSERT(mtx_lock(&allocation_mtx) == thrd_success);
988 allocation* it = allocation_ll;
989 while (it->ptr != ptr) { p = it; it = it->next; }
990 if (p) { p->next = it->next; } else { allocation_ll = it->next; }
991 DO_ASSERT(mtx_unlock(&allocation_mtx) == thrd_success);
992 DO_ASSERT(it->ptr == ptr);
995 static void FREE(void* ptr) {
1000 void* __wrap_malloc(size_t len) {
1001 void* res = __real_malloc(len);
1002 new_allocation(res, "malloc call");
1005 void* __wrap_calloc(size_t nmemb, size_t len) {
1006 void* res = __real_calloc(nmemb, len);
1007 new_allocation(res, "calloc call");
1010 void __wrap_free(void* ptr) {
1015 void* __real_realloc(void* ptr, size_t newlen);
1016 void* __wrap_realloc(void* ptr, size_t len) {
1018 void* res = __real_realloc(ptr, len);
1019 new_allocation(res, "realloc call");
1022 void __wrap_reallocarray(void* ptr, size_t new_sz) {
1023 // Rust doesn't seem to use reallocarray currently
1027 void __attribute__((destructor)) check_leaks() {
1028 for (allocation* a = allocation_ll; a != NULL; a = a->next) {
1029 fprintf(stderr, "%s %p remains:\\n", a->struct_name, a->ptr);
1030 backtrace_symbols_fd(a->bt, a->bt_len, STDERR_FILENO);
1031 fprintf(stderr, "\\n\\n");
1033 DO_ASSERT(allocation_ll == NULL);
1036 out_java.write("""package org.ldk.impl;
1037 import org.ldk.enums.*;
1039 public class bindings {
1040 public static class VecOrSliceDef {
1041 public long dataptr;
1042 public long datalen;
1044 public VecOrSliceDef(long dataptr, long datalen, long stride) {
1045 this.dataptr = dataptr; this.datalen = datalen; this.stride = stride;
1049 System.loadLibrary(\"lightningjni\");
1050 init(java.lang.Enum.class, VecOrSliceDef.class);
1052 static native void init(java.lang.Class c, java.lang.Class slicedef);
1054 public static native boolean deref_bool(long ptr);
1055 public static native long deref_long(long ptr);
1056 public static native void free_heap_ptr(long ptr);
1057 public static native byte[] read_bytes(long ptr, long len);
1058 public static native byte[] get_u8_slice_bytes(long slice_ptr);
1059 public static native long bytes_to_u8_vec(byte[] bytes);
1060 public static native long new_txpointer_copy_data(byte[] txdata);
1061 public static native long vec_slice_len(long vec);
1062 public static native long new_empty_slice_vec();
1066 static jmethodID ordinal_meth = NULL;
1067 static jmethodID slicedef_meth = NULL;
1068 static jclass slicedef_cls = NULL;
1069 JNIEXPORT void Java_org_ldk_impl_bindings_init(JNIEnv * env, jclass _b, jclass enum_class, jclass slicedef_class) {
1070 ordinal_meth = (*env)->GetMethodID(env, enum_class, "ordinal", "()I");
1071 CHECK(ordinal_meth != NULL);
1072 slicedef_meth = (*env)->GetMethodID(env, slicedef_class, "<init>", "(JJJ)V");
1073 CHECK(slicedef_meth != NULL);
1074 slicedef_cls = (*env)->NewGlobalRef(env, slicedef_class);
1075 CHECK(slicedef_cls != NULL);
1078 JNIEXPORT jboolean JNICALL Java_org_ldk_impl_bindings_deref_1bool (JNIEnv * env, jclass _a, jlong ptr) {
1079 return *((bool*)ptr);
1081 JNIEXPORT jlong JNICALL Java_org_ldk_impl_bindings_deref_1long (JNIEnv * env, jclass _a, jlong ptr) {
1082 return *((long*)ptr);
1084 JNIEXPORT void JNICALL Java_org_ldk_impl_bindings_free_1heap_1ptr (JNIEnv * env, jclass _a, jlong ptr) {
1087 JNIEXPORT jbyteArray JNICALL Java_org_ldk_impl_bindings_read_1bytes (JNIEnv * _env, jclass _b, jlong ptr, jlong len) {
1088 jbyteArray ret_arr = (*_env)->NewByteArray(_env, len);
1089 (*_env)->SetByteArrayRegion(_env, ret_arr, 0, len, (unsigned char*)ptr);
1092 JNIEXPORT jbyteArray JNICALL Java_org_ldk_impl_bindings_get_1u8_1slice_1bytes (JNIEnv * _env, jclass _b, jlong slice_ptr) {
1093 LDKu8slice *slice = (LDKu8slice*)slice_ptr;
1094 jbyteArray ret_arr = (*_env)->NewByteArray(_env, slice->datalen);
1095 (*_env)->SetByteArrayRegion(_env, ret_arr, 0, slice->datalen, slice->data);
1098 JNIEXPORT long JNICALL Java_org_ldk_impl_bindings_bytes_1to_1u8_1vec (JNIEnv * _env, jclass _b, jbyteArray bytes) {
1099 LDKCVec_u8Z *vec = (LDKCVec_u8Z*)MALLOC(sizeof(LDKCVec_u8Z), "LDKCVec_u8");
1100 vec->datalen = (*_env)->GetArrayLength(_env, bytes);
1101 vec->data = (uint8_t*)MALLOC(vec->datalen, "LDKCVec_u8Z Bytes");
1102 (*_env)->GetByteArrayRegion (_env, bytes, 0, vec->datalen, vec->data);
1105 JNIEXPORT long JNICALL Java_org_ldk_impl_bindings_new_1txpointer_1copy_1data (JNIEnv * env, jclass _b, jbyteArray bytes) {
1106 LDKTransaction *txdata = (LDKTransaction*)MALLOC(sizeof(LDKTransaction), "LDKTransaction");
1107 txdata->datalen = (*env)->GetArrayLength(env, bytes);
1108 txdata->data = (uint8_t*)MALLOC(txdata->datalen, "Tx Data Bytes");
1109 txdata->data_is_owned = true;
1110 (*env)->GetByteArrayRegion (env, bytes, 0, txdata->datalen, txdata->data);
1111 return (long)txdata;
1113 JNIEXPORT jlong JNICALL Java_org_ldk_impl_bindings_vec_1slice_1len (JNIEnv * env, jclass _a, jlong ptr) {
1114 // Check offsets of a few Vec types are all consistent as we're meant to be generic across types
1115 _Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKCVec_SignatureZ, datalen), "Vec<*> needs to be mapped identically");
1116 _Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKCVec_MessageSendEventZ, datalen), "Vec<*> needs to be mapped identically");
1117 _Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKCVec_EventZ, datalen), "Vec<*> needs to be mapped identically");
1118 _Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKCVec_C2Tuple_usizeTransactionZZ, datalen), "Vec<*> needs to be mapped identically");
1119 LDKCVec_u8Z *vec = (LDKCVec_u8Z*)ptr;
1120 return (long)vec->datalen;
1122 JNIEXPORT long JNICALL Java_org_ldk_impl_bindings_new_1empty_1slice_1vec (JNIEnv * _env, jclass _b) {
1123 // Check sizes of a few Vec types are all consistent as we're meant to be generic across types
1124 _Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKCVec_SignatureZ), "Vec<*> needs to be mapped identically");
1125 _Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKCVec_MessageSendEventZ), "Vec<*> needs to be mapped identically");
1126 _Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKCVec_EventZ), "Vec<*> needs to be mapped identically");
1127 _Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKCVec_C2Tuple_usizeTransactionZZ), "Vec<*> needs to be mapped identically");
1128 LDKCVec_u8Z *vec = (LDKCVec_u8Z*)MALLOC(sizeof(LDKCVec_u8Z), "Empty LDKCVec");
1134 // We assume that CVec_u8Z and u8slice are the same size and layout (and thus pointers to the two can be mixed)
1135 _Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKu8slice), "Vec<u8> and [u8] need to have been mapped identically");
1136 _Static_assert(offsetof(LDKCVec_u8Z, data) == offsetof(LDKu8slice, data), "Vec<u8> and [u8] need to have been mapped identically");
1137 _Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKu8slice, datalen), "Vec<u8> and [u8] need to have been mapped identically");
1141 with open(sys.argv[3] + "/structs/CommonBase.java", "a") as out_java_struct:
1142 out_java_struct.write("""package org.ldk.structs;
1143 import java.util.LinkedList;
1146 LinkedList<Object> ptrs_to = new LinkedList();
1147 protected CommonBase(long ptr) { this.ptr = ptr; }
1148 public long _test_only_get_ptr() { return this.ptr; }
1152 in_block_comment = False
1153 cur_block_obj = None
1155 const_val_regex = re.compile("^extern const ([A-Za-z_0-9]*) ([A-Za-z_0-9]*);$")
1157 line_indicates_result_regex = re.compile("^ (LDKCResultPtr_[A-Za-z_0-9]*) contents;$")
1158 line_indicates_vec_regex = re.compile("^ ([A-Za-z_0-9]*) \*data;$")
1159 line_indicates_opaque_regex = re.compile("^ bool is_owned;$")
1160 line_indicates_trait_regex = re.compile("^ ([A-Za-z_0-9]* \*?)\(\*([A-Za-z_0-9]*)\)\((const )?void \*this_arg(.*)\);$")
1161 assert(line_indicates_trait_regex.match(" uintptr_t (*send_data)(void *this_arg, LDKu8slice data, bool resume_read);"))
1162 assert(line_indicates_trait_regex.match(" LDKCVec_MessageSendEventZ (*get_and_clear_pending_msg_events)(const void *this_arg);"))
1163 assert(line_indicates_trait_regex.match(" void *(*clone)(const void *this_arg);"))
1164 line_field_var_regex = re.compile("^ ([A-Za-z_0-9]*) ([A-Za-z_0-9]*);$")
1165 assert(line_field_var_regex.match(" LDKMessageSendEventsProvider MessageSendEventsProvider;"))
1166 struct_name_regex = re.compile("^typedef (struct|enum|union) (MUST_USE_STRUCT )?(LDK[A-Za-z_0-9]*) {$")
1167 assert(struct_name_regex.match("typedef struct LDKCVecTempl_u8 {"))
1168 assert(struct_name_regex.match("typedef enum LDKNetwork {"))
1169 struct_alias_regex = re.compile("^typedef (LDK[A-Za-z_0-9]*) (LDK[A-Za-z_0-9]*);$")
1170 assert(struct_alias_regex.match("typedef LDKCResultTempl_bool__PeerHandleError LDKCResult_boolPeerHandleErrorZ;"))
1172 result_templ_structs = set()
1173 union_enum_items = {}
1174 result_ptr_struct_items = {}
1176 if in_block_comment:
1177 if line.endswith("*/\n"):
1178 in_block_comment = False
1179 elif cur_block_obj is not None:
1180 cur_block_obj = cur_block_obj + line
1181 if line.startswith("} "):
1185 obj_lines = cur_block_obj.split("\n")
1187 result_contents = None
1188 is_unitary_enum = False
1189 is_union_enum = False
1193 field_var_lines = []
1195 for idx, struct_line in enumerate(obj_lines):
1196 if struct_line.strip().startswith("/*"):
1197 in_block_comment = True
1198 if in_block_comment:
1199 if struct_line.endswith("*/"):
1200 in_block_comment = False
1202 struct_name_match = struct_name_regex.match(struct_line)
1203 if struct_name_match is not None:
1204 struct_name = struct_name_match.group(3)
1205 if struct_name_match.group(1) == "enum":
1206 if not struct_name.endswith("_Tag"):
1207 is_unitary_enum = True
1209 is_union_enum = True
1210 elif struct_name_match.group(1) == "union":
1212 if line_indicates_opaque_regex.match(struct_line):
1214 result_match = line_indicates_result_regex.match(struct_line)
1215 if result_match is not None:
1216 result_contents = result_match.group(1)
1217 vec_ty_match = line_indicates_vec_regex.match(struct_line)
1218 if vec_ty_match is not None and struct_name.startswith("LDKCVecTempl_"):
1219 vec_ty = vec_ty_match.group(1)
1220 elif struct_name.startswith("LDKC2TupleTempl_") or struct_name.startswith("LDKC3TupleTempl_"):
1222 trait_fn_match = line_indicates_trait_regex.match(struct_line)
1223 if trait_fn_match is not None:
1224 trait_fn_lines.append(trait_fn_match)
1225 field_var_match = line_field_var_regex.match(struct_line)
1226 if field_var_match is not None:
1227 field_var_lines.append(field_var_match)
1228 field_lines.append(struct_line)
1230 assert(struct_name is not None)
1231 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))
1232 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))
1233 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))
1234 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))
1235 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))
1236 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))
1237 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))
1240 opaque_structs.add(struct_name)
1241 with open(sys.argv[3] + "/structs/" + struct_name.replace("LDK","") + ".java", "w") as out_java_struct:
1242 out_java_struct.write("package org.ldk.structs;\n\n")
1243 out_java_struct.write("import org.ldk.impl.bindings;\n")
1244 out_java_struct.write("import org.ldk.enums.*;\n\n")
1245 out_java_struct.write("public class " + struct_name.replace("LDK","") + " extends CommonBase")
1246 if struct_name.startswith("LDKLocked"):
1247 out_java_struct.write(" implements AutoCloseable")
1248 out_java_struct.write(" {\n")
1249 out_java_struct.write("\t" + struct_name.replace("LDK", "") + "(Object _dummy, long ptr) { super(ptr); }\n")
1250 if struct_name.startswith("LDKLocked"):
1251 out_java_struct.write("\t@Override public void close() {\n")
1253 out_java_struct.write("\t@Override @SuppressWarnings(\"deprecation\")\n")
1254 out_java_struct.write("\tprotected void finalize() throws Throwable {\n")
1255 out_java_struct.write("\t\tsuper.finalize();\n")
1256 out_java_struct.write("\t\tbindings." + struct_name.replace("LDK","") + "_free(ptr);\n")
1257 out_java_struct.write("\t}\n\n")
1258 elif result_contents is not None:
1259 result_templ_structs.add(struct_name)
1260 assert result_contents in result_ptr_struct_items
1261 elif struct_name.startswith("LDKCResultPtr_"):
1262 for line in field_lines:
1263 if line.endswith("*result;"):
1264 res_ty = line[:-8].strip()
1265 elif line.endswith("*err;"):
1266 err_ty = line[:-5].strip()
1267 result_ptr_struct_items[struct_name] = (res_ty, err_ty)
1269 out_java.write("\tpublic static native long " + struct_name + "_new(")
1270 out_c.write("JNIEXPORT jlong JNICALL Java_org_ldk_impl_bindings_" + struct_name.replace("_", "_1") + "_1new(JNIEnv *_env, jclass _b")
1271 for idx, line in enumerate(field_lines):
1272 if idx != 0 and idx < len(field_lines) - 2:
1273 ty_info = java_c_types(line.strip(';'), None)
1275 out_java.write(", ")
1276 e = chr(ord('a') + idx - 1)
1277 out_java.write(ty_info.java_ty + " " + e)
1278 out_c.write(", " + ty_info.c_ty + " " + e)
1279 out_java.write(");\n")
1280 out_c.write(") {\n")
1281 out_c.write("\t" + struct_name + "* ret = MALLOC(sizeof(" + struct_name + "), \"" + struct_name + "\");\n")
1282 for idx, line in enumerate(field_lines):
1283 if idx != 0 and idx < len(field_lines) - 2:
1284 ty_info = map_type(line.strip(';'), False, None, False)
1285 e = chr(ord('a') + idx - 1)
1286 if ty_info.arg_conv is not None:
1287 out_c.write("\t" + ty_info.arg_conv.replace("\n", "\n\t"))
1288 out_c.write("\n\tret->" + e + " = " + ty_info.arg_conv_name + ";\n")
1290 out_c.write("\tret->" + e + " = " + e + ";\n")
1291 if ty_info.arg_conv_cleanup is not None:
1292 out_c.write("\t//TODO: Really need to call " + ty_info.arg_conv_cleanup + " here\n")
1293 out_c.write("\treturn (long)ret;\n")
1295 elif vec_ty is not None:
1296 if vec_ty in opaque_structs:
1297 out_java.write("\tpublic static native long[] " + struct_name + "_arr_info(long vec_ptr);\n")
1298 out_c.write("JNIEXPORT jlongArray JNICALL Java_org_ldk_impl_bindings_" + struct_name.replace("_", "_1") + "_1arr_1info(JNIEnv *env, jclass _b, jlong ptr) {\n")
1300 out_java.write("\tpublic static native VecOrSliceDef " + struct_name + "_arr_info(long vec_ptr);\n")
1301 out_c.write("JNIEXPORT jobject JNICALL Java_org_ldk_impl_bindings_" + struct_name.replace("_", "_1") + "_1arr_1info(JNIEnv *env, jclass _b, jlong ptr) {\n")
1302 out_c.write("\t" + struct_name + " *vec = (" + struct_name + "*)ptr;\n")
1303 if vec_ty in opaque_structs:
1304 out_c.write("\tjlongArray ret = (*env)->NewLongArray(env, vec->datalen);\n")
1305 out_c.write("\tjlong *ret_elems = (*env)->GetPrimitiveArrayCritical(env, ret, NULL);\n")
1306 out_c.write("\tfor (size_t i = 0; i < vec->datalen; i++) {\n")
1307 out_c.write("\t\tCHECK((((long)vec->data[i].inner) & 1) == 0);\n")
1308 out_c.write("\t\tret_elems[i] = (long)vec->data[i].inner | (vec->data[i].is_owned ? 1 : 0);\n")
1309 out_c.write("\t}\n")
1310 out_c.write("\t(*env)->ReleasePrimitiveArrayCritical(env, ret, ret_elems, 0);\n")
1311 out_c.write("\treturn ret;\n")
1313 out_c.write("\treturn (*env)->NewObject(env, slicedef_cls, slicedef_meth, (long)vec->data, (long)vec->datalen, sizeof(" + vec_ty + "));\n")
1316 ty_info = map_type(vec_ty + " arr_elem", False, None, False)
1317 if len(ty_info.java_fn_ty_arg) == 1: # ie we're a primitive of some form
1318 out_java.write("\tpublic static native long " + struct_name + "_new(" + ty_info.java_ty + "[] elems);\n")
1319 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")
1320 out_c.write("\t" + struct_name + " *ret = MALLOC(sizeof(" + struct_name + "), \"" + struct_name + "\");\n")
1321 out_c.write("\tret->datalen = (*env)->GetArrayLength(env, elems);\n")
1322 out_c.write("\tif (ret->datalen == 0) {\n")
1323 out_c.write("\t\tret->data = NULL;\n")
1324 out_c.write("\t} else {\n")
1325 out_c.write("\t\tret->data = MALLOC(sizeof(" + vec_ty + ") * ret->datalen, \"" + struct_name + " Data\");\n")
1326 out_c.write("\t\t" + ty_info.c_ty + " *java_elems = (*env)->GetPrimitiveArrayCritical(env, elems, NULL);\n")
1327 out_c.write("\t\tfor (size_t i = 0; i < ret->datalen; i++) {\n")
1328 if ty_info.arg_conv is not None:
1329 out_c.write("\t\t\t" + ty_info.c_ty + " arr_elem = java_elems[i];\n")
1330 out_c.write("\t\t\t" + ty_info.arg_conv.replace("\n", "\n\t\t\t") + "\n")
1331 out_c.write("\t\t\tret->data[i] = " + ty_info.arg_conv_name + ";\n")
1332 assert ty_info.arg_conv_cleanup is None
1334 out_c.write("\t\t\tret->data[i] = java_elems[i];\n")
1335 out_c.write("\t\t}\n")
1336 out_c.write("\t\t(*env)->ReleasePrimitiveArrayCritical(env, elems, java_elems, 0);\n")
1337 out_c.write("\t}\n")
1338 out_c.write("\treturn (long)ret;\n")
1341 assert(struct_name.endswith("_Tag"))
1342 struct_name = struct_name[:-4]
1343 union_enum_items[struct_name] = {"field_lines": field_lines}
1344 elif struct_name.endswith("_Body") and struct_name.split("_")[0] in union_enum_items:
1345 enum_var_name = struct_name.split("_")
1346 union_enum_items[enum_var_name[0]][enum_var_name[1]] = field_lines
1347 elif struct_name in union_enum_items:
1348 map_complex_enum(struct_name, union_enum_items[struct_name])
1349 elif is_unitary_enum:
1350 map_unitary_enum(struct_name, field_lines)
1351 elif len(trait_fn_lines) > 0:
1352 trait_structs.add(struct_name)
1353 map_trait(struct_name, field_var_lines, trait_fn_lines)
1354 cur_block_obj = None
1356 fn_ptr = fn_ptr_regex.match(line)
1357 fn_ret_arr = fn_ret_arr_regex.match(line)
1358 reg_fn = reg_fn_regex.match(line)
1359 const_val = const_val_regex.match(line)
1361 if line.startswith("#include <"):
1363 elif line.startswith("/*"):
1364 #out_java.write("\t" + line)
1365 if not line.endswith("*/\n"):
1366 in_block_comment = True
1367 elif line.startswith("typedef enum "):
1368 cur_block_obj = line
1369 elif line.startswith("typedef struct "):
1370 cur_block_obj = line
1371 elif line.startswith("typedef union "):
1372 cur_block_obj = line
1373 elif line.startswith("typedef "):
1374 alias_match = struct_alias_regex.match(line)
1375 if alias_match.group(1) in result_templ_structs:
1376 contents_ty = alias_match.group(1).replace("LDKCResultTempl", "LDKCResultPtr")
1377 res_ty, err_ty = result_ptr_struct_items[contents_ty]
1378 res_map = map_type(res_ty, True, None, False)
1379 err_map = map_type(err_ty, True, None, False)
1381 out_java.write("\tpublic static native boolean " + alias_match.group(2) + "_result_ok(long arg);\n")
1382 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")
1383 out_c.write("\treturn ((" + alias_match.group(2) + "*)arg)->result_ok;\n")
1386 out_java.write("\tpublic static native " + res_map.java_ty + " " + alias_match.group(2) + "_get_ok(long arg);\n")
1387 out_c.write("JNIEXPORT " + res_map.c_ty + " JNICALL Java_org_ldk_impl_bindings_" + alias_match.group(2).replace("_", "_1") + "_1get_1ok (JNIEnv * _env, jclass _a, jlong arg) {\n")
1388 out_c.write("\t" + alias_match.group(2) + " *val = (" + alias_match.group(2) + "*)arg;\n")
1389 out_c.write("\tCHECK(val->result_ok);\n\t")
1390 if res_map.ret_conv is not None:
1391 out_c.write(res_map.ret_conv[0].replace("\n", "\n\t") + "(*val->contents.result)")
1392 out_c.write(res_map.ret_conv[1].replace("\n", "\n\t") + "\n\treturn " + res_map.ret_conv_name)
1394 out_c.write("return *val->contents.result")
1395 out_c.write(";\n}\n")
1397 out_java.write("\tpublic static native " + err_map.java_ty + " " + alias_match.group(2) + "_get_err(long arg);\n")
1398 out_c.write("JNIEXPORT " + err_map.c_ty + " JNICALL Java_org_ldk_impl_bindings_" + alias_match.group(2).replace("_", "_1") + "_1get_1err (JNIEnv * _env, jclass _a, jlong arg) {\n")
1399 out_c.write("\t" + alias_match.group(2) + " *val = (" + alias_match.group(2) + "*)arg;\n")
1400 out_c.write("\tCHECK(!val->result_ok);\n\t")
1401 if err_map.ret_conv is not None:
1402 out_c.write(err_map.ret_conv[0].replace("\n", "\n\t") + "(*val->contents.err)")
1403 out_c.write(err_map.ret_conv[1].replace("\n", "\n\t") + "\n\treturn " + err_map.ret_conv_name)
1405 out_c.write("return *val->contents.err")
1406 elif fn_ptr is not None:
1407 map_fn(line, fn_ptr, None, None)
1408 elif fn_ret_arr is not None:
1409 map_fn(line, fn_ret_arr, fn_ret_arr.group(4), None)
1410 elif reg_fn is not None:
1411 map_fn(line, reg_fn, None, None)
1412 elif const_val_regex is not None:
1413 # TODO Map const variables
1416 assert(line == "\n")
1418 out_java.write("}\n")
1419 for struct_name in opaque_structs:
1420 with open(sys.argv[3] + "/structs/" + struct_name.replace("LDK","") + ".java", "a") as out_java_struct:
1421 out_java_struct.write("}\n")
1422 for struct_name in trait_structs:
1423 with open(sys.argv[3] + "/structs/" + struct_name.replace("LDK","") + ".java", "a") as out_java_struct:
1424 out_java_struct.write("}\n")