1 from bindingstypes import ConvInfo
3 class TypeMappingGenerator:
5 def __init__(self, java_c_types, consts, opaque_structs, clone_fns, unitary_enums, trait_structs, complex_enums, result_types, tuple_types):
6 # trick our way around circular imports
7 self.java_c_types = java_c_types
9 self.opaque_structs = opaque_structs
10 self.clone_fns = clone_fns
11 self.unitary_enums = unitary_enums
12 self.trait_structs = trait_structs
13 self.complex_enums = complex_enums
14 self.result_types = result_types
15 self.tuple_types = tuple_types
17 def map_type(self, fn_arg, print_void, ret_arr_len, is_free, holds_ref):
18 ty_info = self.java_c_types(fn_arg, ret_arr_len)
19 mapped_info = self.map_type_with_info(ty_info, print_void, ret_arr_len, is_free, holds_ref, False)
22 def map_nullable_type(self, fn_arg, print_void, ret_arr_len, is_free, holds_ref):
23 ty_info = self.java_c_types(fn_arg, ret_arr_len)
24 mapped_info = self.map_type_with_info(ty_info, print_void, ret_arr_len, is_free, holds_ref, True)
27 def map_type_with_info(self, ty_info, print_void, ret_arr_len, is_free, holds_ref, is_nullable):
28 mapped_info = self._do_map_type_with_info(ty_info, print_void, ret_arr_len, is_free, holds_ref, is_nullable)
30 mapped_info.nullable = True
33 def _do_map_type_with_info(self, ty_info, print_void, ret_arr_len, is_free, holds_ref, is_nullable):
34 if ty_info.c_ty == "void":
36 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
37 arg_conv = None, arg_conv_name = None, arg_conv_cleanup = None,
38 ret_conv = None, ret_conv_name = None, to_hu_conv = None, to_hu_conv_name = None, from_hu_conv = None)
39 if ty_info.c_ty.endswith("Array"):
40 arr_len = ty_info.arr_len
41 if arr_len is not None:
42 arr_name = ty_info.var_name
46 if ty_info.c_ty == "int8_tArray":
47 (set_pfx, set_sfx) = self.consts.set_native_arr_contents(arr_name + "_arr", arr_len, ty_info)
48 ret_conv = ("int8_tArray " + arr_name + "_arr = " + self.consts.create_native_arr_call(arr_len, ty_info) + ";\n" + set_pfx, "")
49 arg_conv_cleanup = None
50 if not arr_len.isdigit():
51 arg_conv = ty_info.rust_obj + " " + arr_name + "_ref;\n"
52 arg_conv = arg_conv + arr_name + "_ref." + arr_len + " = " + self.consts.get_native_arr_len_call[0] + arr_name + self.consts.get_native_arr_len_call[1] + ";\n"
53 if (not ty_info.is_ptr or not holds_ref) and ty_info.rust_obj != "LDKu8slice":
54 arg_conv = arg_conv + arr_name + "_ref." + ty_info.arr_access + " = MALLOC(" + arr_name + "_ref." + arr_len + ", \"" + ty_info.rust_obj + " Bytes\");\n"
55 arg_conv = arg_conv + self.consts.get_native_arr_contents(arr_name, arr_name + "_ref." + ty_info.arr_access, arr_name + "_ref." + arr_len, ty_info, True) + ";"
57 arg_conv = arg_conv + arr_name + "_ref." + ty_info.arr_access + " = " + self.consts.get_native_arr_contents(arr_name, "NO_DEST", arr_name + "_ref." + arr_len, ty_info, False) + ";"
58 arg_conv_cleanup = self.consts.cleanup_native_arr_ref_contents(arr_name, arr_name + "_ref." + ty_info.arr_access, arr_name + "_ref." + arr_len, ty_info)
59 if ty_info.rust_obj == "LDKTransaction" or ty_info.rust_obj == "LDKWitness":
60 arg_conv = arg_conv + "\n" + arr_name + "_ref.data_is_owned = " + str(holds_ref).lower() + ";"
61 ret_conv = (ty_info.rust_obj + " " + arr_name + "_var = ", "")
62 ret_conv = (ret_conv[0], ";\nint8_tArray " + arr_name + "_arr = " + self.consts.create_native_arr_call(arr_name + "_var." + arr_len, ty_info) + ";\n")
63 (pfx, sfx) = self.consts.set_native_arr_contents(arr_name + "_arr", arr_name + "_var." + arr_len, ty_info)
64 ret_conv = (ret_conv[0], ret_conv[1] + pfx + arr_name + "_var." + ty_info.arr_access + sfx + ";")
65 if not holds_ref and ty_info.rust_obj != "LDKu8slice":
66 ret_conv = (ret_conv[0], ret_conv[1] + "\n" + ty_info.rust_obj.replace("LDK", "") + "_free(" + arr_name + "_var);")
67 from_hu_conv = self.consts.primitive_arr_from_hu(ty_info, None, arr_name)
68 to_hu_conv = self.consts.primitive_arr_to_hu(ty_info, None, arr_name, arr_name + "_conv")
69 elif ty_info.rust_obj is not None:
70 arg_conv = ty_info.rust_obj + " " + arr_name + "_ref;\n"
71 arg_conv = arg_conv + "CHECK(" + self.consts.get_native_arr_len_call[0] + arr_name + self.consts.get_native_arr_len_call[1] + " == " + arr_len + ");\n"
72 arg_conv = arg_conv + self.consts.get_native_arr_contents(arr_name, arr_name + "_ref." + ty_info.arr_access, arr_len, ty_info, True) + ";"
73 ret_conv = (ret_conv[0], "." + ty_info.arr_access + set_sfx + ";")
74 from_hu_conv = self.consts.primitive_arr_from_hu(ty_info, arr_len, arr_name)
75 to_hu_conv = self.consts.primitive_arr_to_hu(ty_info, None, arr_name, arr_name + "_conv")
77 arg_conv = "unsigned char " + arr_name + "_arr[" + arr_len + "];\n"
78 arg_conv = arg_conv + "CHECK(" + self.consts.get_native_arr_len_call[0] + arr_name + self.consts.get_native_arr_len_call[1] + " == " + arr_len + ");\n"
79 arg_conv = arg_conv + self.consts.get_native_arr_contents(arr_name, arr_name + "_arr", arr_len, ty_info, True) + ";\n"
80 arg_conv = arg_conv + "unsigned char (*" + arr_name + "_ref)[" + arr_len + "] = &" + arr_name + "_arr;"
81 ret_conv = (ret_conv[0] + "*", set_sfx + ";")
82 from_hu_conv = self.consts.primitive_arr_from_hu(ty_info, arr_len, arr_name)
83 to_hu_conv = self.consts.primitive_arr_to_hu(ty_info, None, arr_name, arr_name + "_conv")
84 to_hu_conv_name = None
85 if to_hu_conv is not None:
86 to_hu_conv_name = arr_name + "_conv"
87 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
88 arg_conv = arg_conv, arg_conv_name = arr_name + "_ref", arg_conv_cleanup = arg_conv_cleanup,
89 ret_conv = ret_conv, ret_conv_name = arr_name + "_arr",
90 to_hu_conv = to_hu_conv, to_hu_conv_name = to_hu_conv_name,
91 from_hu_conv = from_hu_conv)
93 assert not arr_len.isdigit() # fixed length arrays not implemented
94 assert ty_info.java_hu_ty[len(ty_info.java_hu_ty) - 2:] == "[]"
97 conv_name = arr_name + "_conv_" + str(len(ty_info.java_hu_ty))
98 idxc = chr(ord('a') + (len(ty_info.java_hu_ty) % 26))
99 ty_info.subty.var_name = conv_name
100 #XXX: We'd really prefer to only ever set to False, avoiding lots of clone, but need smarter free logic
101 #if ty_info.is_ptr or holds_ref:
102 # ty_info.subty.requires_clone = False
103 ty_info.subty.requires_clone = not ty_info.is_ptr or not holds_ref
104 if not ty_info.subty.is_native_primitive and ty_info.subty.rust_obj == "LDKChannelMonitor":
105 # We take a Vec of references to ChannelMonitors as input to ChannelManagerReadArgs, if we clone them,
106 # we end up freeing the clones after creating the ChannelManagerReadArgs before calling the read
107 # function itself, resulting in a segfault. Thus, we manually check and ensure we don't clone for
108 # ChannelMonitors inside of vecs.
109 ty_info.subty.requires_clone = False
110 subty = self.map_type_with_info(ty_info.subty, False, None, is_free, holds_ref, False)
111 arg_conv = ty_info.rust_obj + " " + arr_name + "_constr;\n"
115 arg_conv += ty_info.rust_obj + " *" + arr_name + "_ptr = NULL;\n"
116 arg_conv += "if (" + self.consts.is_arr_some_check[0] + arr_name + self.consts.is_arr_some_check[1] + ") {\n"
117 arg_conv += pf + arr_name + "_constr." + arr_len + " = " + self.consts.get_native_arr_len_call[0] + arr_name + self.consts.get_native_arr_len_call[1] + ";\n"
118 arg_conv += pf + "if (" + arr_name + "_constr." + arr_len + " > 0)\n"
119 if subty.is_native_primitive:
122 szof = subty.rust_obj
123 arg_conv += pf + "\t" + arr_name + "_constr." + ty_info.arr_access + " = MALLOC(" + arr_name + "_constr." + arr_len + " * sizeof(" + szof + "), \"" + ty_info.rust_obj + " Elements\");\n"
124 arg_conv += pf + "else\n"
125 arg_conv += pf + "\t" + arr_name + "_constr." + ty_info.arr_access + " = NULL;\n"
126 get_arr = self.consts.get_native_arr_contents(arr_name, "NO_DEST", arr_name + "_constr." + arr_len, ty_info, False)
128 arg_conv += pf + subty.c_ty + "* " + arr_name + "_vals = " + get_arr + ";\n"
129 arg_conv += pf + "for (size_t " + idxc + " = 0; " + idxc + " < " + arr_name + "_constr." + arr_len + "; " + idxc + "++) {\n"
131 arg_conv += pf + "\t" + subty.c_ty + " " + conv_name + " = " + arr_name + "_vals[" + idxc + "];"
132 if subty.arg_conv is not None:
133 arg_conv += "\n\t" + pf + subty.arg_conv.replace("\n", "\n\t" + pf)
135 arg_conv += pf + "\t" + subty.c_ty + " " + conv_name + " = " + self.consts.get_native_arr_elem(arr_name, idxc, ty_info) + ";\n"
136 arg_conv += pf + "\t" + subty.arg_conv.replace("\n", "\n\t" + pf)
137 arg_conv += "\n\t" + pf + arr_name + "_constr." + ty_info.arr_access + "[" + idxc + "] = " + subty.arg_conv_name + ";\n" + pf + "}"
139 cleanup = self.consts.cleanup_native_arr_ref_contents(arr_name, arr_name + "_vals", arr_name + "_constr." + arr_len, ty_info)
140 if cleanup is not None:
141 arg_conv += "\n" + pf + cleanup + ";"
143 arg_conv_name = arr_name + "_ptr"
145 arg_conv_name = arr_name + "_constr"
146 arg_conv_cleanup = None
148 arg_conv_cleanup = "if (" + arr_name + "_ptr != NULL) { FREE(" + arr_name + "_constr." + ty_info.arr_access + "); }"
150 arg_conv += "\n\t" + arr_name + "_ptr = &" + arr_name + "_constr;\n}"
153 ret_conv = (ty_info.rust_obj + " *" + arr_name + "_var_ptr = ", "")
155 ret_conv = (ty_info.rust_obj + " " + arr_name + "_var = ", "")
156 if subty.ret_conv is None:
157 ret_conv = ("DUMMY", "DUMMY")
159 ret_conv = (ret_conv[0], ";\n" + ty_info.c_ty + " " + arr_name + "_arr = NULL;\n")
162 ret_conv = (ret_conv[0], ret_conv[1] + "if (" + arr_name + " != NULL) {\n")
163 ret_conv = (ret_conv[0], ret_conv[1] + "\t" + ty_info.rust_obj + " " + arr_name + "_var = *" + arr_name + "_var_ptr;\n")
165 ret_conv = (ret_conv[0], ret_conv[1] + indent + arr_name + "_arr = " + self.consts.create_native_arr_call(arr_name + "_var." + arr_len, ty_info) + ";\n")
166 get_ptr_call = self.consts.get_native_arr_ptr_call(ty_info)
167 if get_ptr_call is not None:
168 ret_conv = (ret_conv[0], ret_conv[1] + indent + subty.c_ty + " *" + arr_name + "_arr_ptr = " + get_ptr_call[0] + arr_name + "_arr" + get_ptr_call[1] + ";\n")
169 ret_conv = (ret_conv[0], ret_conv[1] + indent + "for (size_t " + idxc + " = 0; " + idxc + " < " + arr_name + "_var." + arr_len + "; " + idxc + "++) {\n")
170 ret_conv = (ret_conv[0], ret_conv[1] + indent + "\t" + subty.ret_conv[0].replace("\n", "\n\t" + indent))
171 ret_conv = (ret_conv[0], ret_conv[1] + indent + arr_name + "_var." + ty_info.arr_access + "[" + idxc + "]" + subty.ret_conv[1].replace("\n", "\n\t" + indent) + "\n")
172 if get_ptr_call is not None:
173 ret_conv = (ret_conv[0], ret_conv[1] + indent + "\t" + arr_name + "_arr_ptr[" + idxc + "] = " + subty.ret_conv_name + ";\n" + indent + "}\n")
175 ret_conv = (ret_conv[0], ret_conv[1] + indent + "\t" + self.consts.get_native_arr_entry_call(ty_info, arr_name + "_arr", idxc, subty.ret_conv_name) + ";\n" + indent + "}\n")
176 cleanup = self.consts.release_native_arr_ptr_call(ty_info, arr_name + "_arr", arr_name + "_arr_ptr")
177 if cleanup is not None:
178 ret_conv = (ret_conv[0], ret_conv[1] + indent + cleanup + ";")
179 if not holds_ref and not is_nullable:
180 # XXX: The commented if's are a bit smarter freeing, but we need to be a nudge smarter still
181 # Note that we don't drop the full vec here - we're passing ownership to java (or have cloned) or free'd by now!
182 ret_conv = (ret_conv[0], ret_conv[1] + "\n" + indent + "FREE(" + arr_name + "_var." + ty_info.arr_access + ");")
183 #if subty.rust_obj is not None and subty.rust_obj in self.opaque_structs:
184 # ret_conv = (ret_conv[0], ret_conv[1] + "\nFREE(" + arr_name + "_var." + ty_info.arr_access + ");")
186 # ret_conv = (ret_conv[0], ret_conv[1] + "\n" + ty_info.rust_obj.replace("LDK", "") + "_free(" + arr_name + "_var);")
188 ret_conv = (ret_conv[0], ret_conv[1] + "\n}")
190 if subty.to_hu_conv is not None:
191 to_hu_conv = self.consts.var_decl_statement(self.consts.c_type_map["uint32_t"][0], conv_name + "_len", self.consts.get_java_arr_len(arr_name)) + ";\n"
192 to_hu_conv += self.consts.var_decl_statement(ty_info.java_hu_ty, conv_name + "_arr", self.consts.constr_hu_array(ty_info, conv_name + "_len"))
196 to_hu_conv += "if (" + arr_name + " != null) {\n"
198 to_hu_conv += pfx + self.consts.for_n_in_range(idxc, "0", conv_name + "_len") + "\n"
200 to_hu_conv += pfx + "\t" + self.consts.var_decl_statement(subty.java_ty, conv_name, self.consts.get_java_arr_elem(subty, arr_name, idxc)) + ";\n"
201 to_hu_conv += pfx + "\t" + subty.to_hu_conv.replace("\n", "\n\t" + pfx) + "\n"
202 to_hu_conv += pfx + "\t" + conv_name + "_arr[" + idxc + "] = " + subty.to_hu_conv_name + ";\n"
203 to_hu_conv += pfx + "}"
206 cleanup = self.consts.cleanup_converted_native_array(ty_info, arr_name)
207 if cleanup is not None:
208 to_hu_conv += "\n" + cleanup
209 to_hu_conv_name = conv_name + "_arr"
211 to_hu_conv = self.consts.primitive_arr_to_hu(ty_info, None, arr_name, arr_name + "_conv")
212 if to_hu_conv is not None:
213 to_hu_conv_name = arr_name + "_conv"
215 to_hu_conv_name = None
216 from_hu_conv = self.consts.primitive_arr_from_hu(ty_info, None, arr_name)
217 if subty.from_hu_conv is not None:
219 if subty.from_hu_conv[1] != "":
220 iterator = self.consts.for_n_in_arr(conv_name, arr_name, subty)
222 hu_conv_b = "if (" + arr_name + " != null) { " + iterator[0] + subty.from_hu_conv[1] + ";" + iterator[1] + " }"
224 hu_conv_b = iterator[0] + subty.from_hu_conv[1] + ";" + iterator[1]
225 if from_hu_conv is not None:
226 arr_conv = self.consts.primitive_arr_from_hu(ty_info, None, self.consts.map_hu_array_elems(arr_name, conv_name, ty_info, subty))
227 assert arr_conv[1] == ""
228 from_hu_conv = (arr_conv[0], hu_conv_b)
230 from_hu_conv = (self.consts.map_hu_array_elems(arr_name, conv_name, ty_info, subty), hu_conv_b)
232 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
233 arg_conv = arg_conv, arg_conv_name = arg_conv_name, arg_conv_cleanup = arg_conv_cleanup,
234 ret_conv = ret_conv, ret_conv_name = arr_name + "_arr", to_hu_conv = to_hu_conv, to_hu_conv_name = to_hu_conv_name, from_hu_conv = from_hu_conv)
235 elif ty_info.java_fn_ty_arg == "Ljava/lang/String;":
236 assert not is_nullable
238 arg_conv = "LDKStr " + ty_info.var_name + "_conv = " + self.consts.str_ref_to_c_call(ty_info.var_name) + ";"
239 arg_conv_name = ty_info.var_name + "_conv"
241 arg_conv = "LDKStr dummy = { .chars = NULL, .len = 0, .chars_is_owned = false };"
242 arg_conv_name = "dummy"
243 if ty_info.arr_access is None:
245 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
246 arg_conv = arg_conv, arg_conv_name = arg_conv_name, arg_conv_cleanup = None,
247 ret_conv = ("const char* " + ty_info.var_name + "_str = ",
248 ";\njstring " + ty_info.var_name + "_conv = " + self.consts.str_ref_to_native_call(ty_info.var_name + "_str", "strlen(" + ty_info.var_name + "_str)") + ";"),
249 ret_conv_name = ty_info.var_name + "_conv",
250 to_hu_conv = None, to_hu_conv_name = None, from_hu_conv = None)
254 free_str = "\nStr_free(" + ty_info.var_name + "_str);"
255 to_hu_conv = self.consts.str_to_hu_conv(ty_info.var_name)
256 to_hu_conv_name = None
257 if to_hu_conv is not None:
258 to_hu_conv_name = ty_info.var_name + "_conv"
259 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
260 arg_conv = arg_conv, arg_conv_name = arg_conv_name, arg_conv_cleanup = None,
261 ret_conv = ("LDKStr " + ty_info.var_name + "_str = ",
262 ";\njstring " + ty_info.var_name + "_conv = " + self.consts.str_ref_to_native_call(ty_info.var_name + "_str." + ty_info.arr_access, ty_info.var_name + "_str." + ty_info.arr_len) + ";" + free_str),
263 ret_conv_name = ty_info.var_name + "_conv",
264 to_hu_conv=to_hu_conv, to_hu_conv_name=to_hu_conv_name,
265 from_hu_conv = self.consts.str_from_hu_conv(ty_info.var_name))
266 elif ty_info.var_name == "" and not print_void:
267 # We don't have a parameter name, and want one, just call it arg
268 if not ty_info.is_native_primitive:
269 assert(not is_free or ty_info.rust_obj not in self.opaque_structs)
270 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
271 arg_conv = ty_info.rust_obj + " arg_conv = *(" + ty_info.rust_obj + "*)untag_ptr(arg);\nFREE(untag_ptr(arg));",
272 arg_conv_name = "arg_conv", arg_conv_cleanup = None,
273 ret_conv = None, ret_conv_name = None, to_hu_conv = "TODO 7", to_hu_conv_name = None, from_hu_conv = None)
276 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
277 arg_conv = None, arg_conv_name = "arg", arg_conv_cleanup = None,
278 ret_conv = None, ret_conv_name = None, to_hu_conv = "TODO 8", to_hu_conv_name = None, from_hu_conv = None)
279 elif ty_info.is_native_primitive and ty_info.c_ty != "void":
280 assert not is_nullable
281 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
282 arg_conv = None, arg_conv_name = ty_info.var_name, arg_conv_cleanup = None,
283 ret_conv = (ty_info.c_ty + " " + ty_info.var_name + "_conv = ", ";"), ret_conv_name = ty_info.var_name + "_conv",
284 to_hu_conv = None, to_hu_conv_name = None, from_hu_conv = None)
285 elif ty_info.c_ty == "void":
286 assert ty_info.is_native_primitive
287 assert not is_nullable
288 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
289 arg_conv = None, arg_conv_name = ty_info.var_name, arg_conv_cleanup = None,
290 ret_conv = None, ret_conv_name = ty_info.var_name,
291 to_hu_conv = None, to_hu_conv_name = None, from_hu_conv = None)
293 if ty_info.var_name == "":
294 ty_info.var_name = "ret"
296 if ty_info.rust_obj in self.opaque_structs:
297 from_hu_conv = (ty_info.var_name + " == null ? " + self.consts.native_zero_ptr + " : " + self.consts.get_ptr(ty_info.var_name), self.consts.add_ref("this", ty_info.var_name))
298 opaque_arg_conv = ty_info.rust_obj + " " + ty_info.var_name + "_conv;\n"
299 opaque_arg_conv = opaque_arg_conv + ty_info.var_name + "_conv.inner = untag_ptr(" + ty_info.var_name + ");\n"
300 opaque_arg_conv += ty_info.var_name + "_conv.is_owned = ptr_is_owned(" + ty_info.var_name + ");\n"
301 opaque_arg_conv += "CHECK_INNER_FIELD_ACCESS_OR_NULL(" + ty_info.var_name + "_conv);"
303 if not is_free and (not ty_info.is_ptr or not holds_ref or ty_info.requires_clone == True) and ty_info.requires_clone != False:
304 if (ty_info.rust_obj.replace("LDK", "") + "_clone") in self.clone_fns:
305 # 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.
306 # arg_conv is used when converting a function argument from java normally (with holds_ref set),
307 # and when converting a java value being returned from a trait method (with holds_ref unset).
308 # In the second case, we need to clone before returning to C (as once we return the GC can free the object),
309 # whereas in the first we prefer to clone in C to avoid additional Java code as much as possible.
311 opaque_arg_conv += "\n" + ty_info.var_name + "_conv = " + ty_info.rust_obj.replace("LDK", "") + "_clone(&" + ty_info.var_name + "_conv);"
313 from_hu_conv = (ty_info.var_name + " == null ? " + self.consts.native_zero_ptr + " : " + ty_info.var_name + ".clone_ptr()", "")
314 elif ty_info.passed_as_ptr:
315 opaque_arg_conv += "\n// WARNING: we need a move here but no clone is available for " + ty_info.rust_obj + "\n"
316 # TODO: Once we support features cloning (which just isn't in C yet), we can make this a compile error instead!
317 from_hu_conv = (from_hu_conv[0], from_hu_conv[1] + ";\n" +
318 "// Due to rust's strict-ownership memory model, in some cases we need to \"move\"\n" +
319 "// an object to pass exclusive ownership to the function being called.\n" +
320 "// In most cases, we avoid this being visible in GC'd languages by cloning the object\n" +
321 "// at the FFI layer, creating a new object which Rust can claim ownership of\n" +
322 "// However, in some cases (eg here), there is no way to clone an object, and thus\n" +
323 "// we actually have to pass full ownership to Rust.\n" +
324 "// Thus, after this call, " + ty_info.var_name + " is reset to null and is now a dummy object.\n" + self.consts.set_null_skip_free(ty_info.var_name))
326 opaque_arg_conv += "\n" + ty_info.var_name + "_conv.is_owned = false;"
328 opaque_ret_conv_suf = ";\n"
329 opaque_ret_conv_suf += self.consts.ptr_c_ty + " " + ty_info.var_name + "_ref = 0;\n"
330 if not holds_ref and ty_info.is_ptr and (ty_info.rust_obj.replace("LDK", "") + "_clone") in self.clone_fns: # is_ptr, not holds_ref implies passing a pointed-to value to java, which needs copied
331 opaque_ret_conv_suf += ty_info.var_name + "_var = " + ty_info.rust_obj.replace("LDK", "") + "_clone(&" + ty_info.var_name + "_var);\n"
332 elif not holds_ref and ty_info.is_ptr:
333 opaque_ret_conv_suf += "// WARNING: we may need a move here but no clone is available for " + ty_info.rust_obj + "\n"
335 opaque_ret_conv_suf += "CHECK_INNER_FIELD_ACCESS_OR_NULL(" + ty_info.var_name + "_var);\n"
337 opaque_ret_conv_suf += ty_info.var_name + "_ref = tag_ptr(" + ty_info.var_name + "_var.inner, false);"
339 opaque_ret_conv_suf += ty_info.var_name + "_ref = tag_ptr(" + ty_info.var_name + "_var.inner, " + ty_info.var_name + "_var.is_owned);"
342 if not ty_info.is_ptr or holds_ref:
343 to_hu_conv_sfx = "\n" + self.consts.add_ref(ty_info.var_name + "_hu_conv", "this") + ";"
344 qualified_hu_ty = self.consts.fully_qualified_hu_ty_path(ty_info)
346 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
347 arg_conv = opaque_arg_conv, arg_conv_name = "&" + ty_info.var_name + "_conv", arg_conv_cleanup = None,
348 ret_conv = (ty_info.rust_obj + " " + ty_info.var_name + "_var = *", opaque_ret_conv_suf),
349 ret_conv_name = ty_info.var_name + "_ref",
350 to_hu_conv = self.consts.to_hu_conv_templates['ptr'].replace('{human_type}', qualified_hu_ty).replace('{var_name}', ty_info.var_name) + to_hu_conv_sfx,
351 to_hu_conv_name = ty_info.var_name + "_hu_conv",
352 from_hu_conv = from_hu_conv)
354 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
355 arg_conv = opaque_arg_conv, arg_conv_name = ty_info.var_name + "_conv", arg_conv_cleanup = None,
356 ret_conv = (ty_info.rust_obj + " " + ty_info.var_name + "_var = ", opaque_ret_conv_suf),
357 ret_conv_name = ty_info.var_name + "_ref",
358 to_hu_conv = self.consts.to_hu_conv_templates['default'].replace('{human_type}', qualified_hu_ty).replace('{var_name}', ty_info.var_name) + to_hu_conv_sfx,
359 to_hu_conv_name = ty_info.var_name + "_hu_conv",
360 from_hu_conv = from_hu_conv)
362 assert not is_nullable
363 if not ty_info.is_ptr:
364 if ty_info.rust_obj in self.unitary_enums:
365 (ret_pfx, ret_sfx) = self.consts.c_unitary_enum_to_native_call(ty_info)
366 (arg_pfx, arg_sfx) = self.consts.native_unitary_enum_to_c_call(ty_info)
367 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
368 arg_conv = ty_info.rust_obj + " " + ty_info.var_name + "_conv = " + arg_pfx + ty_info.var_name + arg_sfx + ";",
369 arg_conv_name = ty_info.var_name + "_conv",
370 arg_conv_cleanup = None,
371 ret_conv = (ty_info.c_ty + " " + ty_info.var_name + "_conv = " + ret_pfx, ret_sfx + ";"),
372 ret_conv_name = ty_info.var_name + "_conv", to_hu_conv = None, to_hu_conv_name = None, from_hu_conv = None)
373 base_conv = "void* " + ty_info.var_name + "_ptr = untag_ptr(" + ty_info.var_name + ");\n"
374 base_conv += "CHECK_ACCESS(" + ty_info.var_name + "_ptr);\n"
375 base_conv += ty_info.rust_obj + " " + ty_info.var_name + "_conv = *(" + ty_info.rust_obj + "*)(" + ty_info.var_name + "_ptr);"
377 if ty_info.rust_obj in self.trait_structs:
378 ret_conv = (ty_info.rust_obj + "* " + ty_info.var_name + "_ret = MALLOC(sizeof(" + ty_info.rust_obj + "), \"" + ty_info.rust_obj + "\");\n*" + ty_info.var_name + "_ret = ", ";")
380 if (ty_info.rust_obj.replace("LDK", "") + "_clone") in self.clone_fns:
381 ret_conv = (ret_conv[0] + ty_info.rust_obj.replace("LDK", "") + "_clone(&", ");")
383 ret_conv = (ret_conv[0], ";\n// WARNING: We likely need to clone here, but no clone is available, so we just do it for Java instances")
384 ret_conv = (ret_conv[0], ret_conv[1] + "" + self.consts.trait_struct_inc_refcnt(ty_info).replace(ty_info.var_name + "_conv", "(*" + ty_info.var_name + "_ret)"))
386 needs_full_clone = not is_free and (not ty_info.is_ptr and not holds_ref or ty_info.requires_clone == True) and ty_info.requires_clone != False
387 if needs_full_clone and (ty_info.rust_obj.replace("LDK", "") + "_clone") in self.clone_fns:
388 # arg_conv is used when converting a function argument from java normally (with holds_ref set),
389 # and when converting a java value being returned from a trait method (with holds_ref unset).
390 # In the second case, we need to clone before returning to C (as once we return the GC can free the object),
391 # whereas in the first we prefer to clone in C to avoid additional Java code as much as possible.
393 base_conv += "\n" + ty_info.var_name + "_conv = " + ty_info.rust_obj.replace("LDK", "") + "_clone(&" + ty_info.var_name + "_conv);"
395 from_hu_conv = (ty_info.var_name + " == null ? " + self.consts.native_zero_ptr + " : " + ty_info.var_name + ".clone_ptr()", "")
396 base_conv += "\n" + "FREE(untag_ptr(" + ty_info.var_name + "));"
398 base_conv = base_conv + self.consts.trait_struct_inc_refcnt(ty_info)
400 base_conv += "// WARNING: we may need a move here but no clone is available for " + ty_info.rust_obj + "\n"
402 base_conv = base_conv + "\n" + "FREE(untag_ptr(" + ty_info.var_name + "));"
403 if from_hu_conv is None:
404 from_hu_conv = (ty_info.var_name + " == null ? " + self.consts.native_zero_ptr + " : " + self.consts.get_ptr(ty_info.var_name), "")
405 from_hu_conv = (from_hu_conv[0], self.consts.add_ref("this", ty_info.var_name))
406 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
407 arg_conv = base_conv, arg_conv_name = ty_info.var_name + "_conv", arg_conv_cleanup = None,
408 ret_conv = ret_conv, ret_conv_name = "tag_ptr(" + ty_info.var_name + "_ret, true)",
409 to_hu_conv = self.consts.var_decl_statement(ty_info.java_hu_ty, "ret_hu_conv", "new " + ty_info.java_hu_ty + "(null, " + ty_info.var_name + ")") + ";\n" + self.consts.add_ref("ret_hu_conv", "this") + ";",
410 to_hu_conv_name = "ret_hu_conv", from_hu_conv = from_hu_conv)
411 needs_full_clone = not is_free and (not ty_info.is_ptr or ty_info.requires_clone == True) and ty_info.requires_clone != False
413 if "res" in ty_info.var_name: # XXX: This is a stupid hack
414 needs_full_clone = False
415 if needs_full_clone and (ty_info.rust_obj.replace("LDK", "") + "_clone") in self.clone_fns:
416 # arg_conv is used when converting a function argument from java normally (with holds_ref set),
417 # and when converting a java value being returned from a trait method (with holds_ref unset).
418 # In the second case, we need to clone before returning to C (as once we return the GC can free the object),
419 # whereas in the first we prefer to clone in C to avoid additional Java code as much as possible.
421 base_conv += "\n" + ty_info.var_name + "_conv = " + ty_info.rust_obj.replace("LDK", "") + "_clone((" + ty_info.rust_obj + "*)untag_ptr(" + ty_info.var_name + "));"
423 from_hu_conv = (ty_info.var_name + " == null ? " + self.consts.native_zero_ptr + " : " + ty_info.var_name + ".clone_ptr()", "")
424 base_conv += "\n" + "FREE(untag_ptr(" + ty_info.var_name + "));"
425 elif needs_full_clone:
426 base_conv = base_conv + "\n// WARNING: we may need a move here but no clone is available for " + ty_info.rust_obj
427 if not needs_full_clone and ty_info.rust_obj != "LDKu8slice" and (not holds_ref or is_free):
428 # Don't bother free'ing slices passed in - Rust doesn't auto-free the
429 # underlying unlike Vecs, and it gives Java more freedom.
430 base_conv = base_conv + "\nFREE(untag_ptr(" + ty_info.var_name + "));"
431 if ty_info.rust_obj in self.complex_enums:
433 if needs_full_clone and (ty_info.rust_obj.replace("LDK", "") + "_clone") not in self.clone_fns:
434 # We really need a full clone here, but for now we just implement
435 # a manual clone explicitly for Option<Trait>s
436 if ty_info.contains_trait:
437 assert ty_info.rust_obj.startswith("LDKCOption") # We don't support contained traits for anything else yet
438 optional_ty = ty_info.rust_obj[11:-1]
439 assert "LDK" + optional_ty in self.trait_structs # We don't support contained traits for anything else yet
440 to_hu_conv_sfx = self.consts.add_ref("this", ty_info.var_name)
441 base_conv += "\nif (" + ty_info.var_name + "_conv.tag == " + ty_info.rust_obj + "_Some) {"
442 base_conv += "\n\t// Manually implement clone for Java trait instances"
443 optional_ty_info = self.java_c_types("LDK" + optional_ty + " " + ty_info.var_name, None)
444 base_conv += self.consts.trait_struct_inc_refcnt(optional_ty_info).\
445 replace("\n", "\n\t").replace(ty_info.var_name + "_conv", ty_info.var_name + "_conv.some")
447 ret_conv = (self.consts.ptr_c_ty + " " + ty_info.var_name + "_ref = tag_ptr(&", ", false);")
449 ret_conv = (ty_info.rust_obj + " *" + ty_info.var_name + "_copy = MALLOC(sizeof(" + ty_info.rust_obj + "), \"" + ty_info.rust_obj + "\");\n", "")
450 ret_conv = (ret_conv[0] + "*" + ty_info.var_name + "_copy = ", "")
451 ret_conv = (ret_conv[0], ";\n" + self.consts.ptr_c_ty + " " + ty_info.var_name + "_ref = tag_ptr(" + ty_info.var_name + "_copy, true);")
452 if from_hu_conv is None:
453 from_hu_conv = (self.consts.get_ptr(ty_info.var_name), "")
454 from_hu_conv = (from_hu_conv[0], to_hu_conv_sfx)
455 fully_qualified_ty = self.consts.fully_qualified_hu_ty_path(ty_info)
456 to_hu_call = fully_qualified_ty + ".constr_from_ptr(" + ty_info.var_name + ")"
457 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
458 arg_conv = base_conv, arg_conv_name = ty_info.var_name + "_conv", arg_conv_cleanup = None,
459 ret_conv = ret_conv, ret_conv_name = ty_info.var_name + "_ref",
460 to_hu_conv = self.consts.var_decl_statement(fully_qualified_ty, ty_info.var_name + "_hu_conv", to_hu_call) + ";\n" + self.consts.add_ref(ty_info.var_name + "_hu_conv", "this") + ";",
461 to_hu_conv_name = ty_info.var_name + "_hu_conv", from_hu_conv = from_hu_conv)
462 if ty_info.rust_obj in self.result_types:
464 # If we're trying to return a ref, we have to clone.
465 # We just blindly assume its implemented and let the compiler fail if its not.
466 ret_conv = (ty_info.rust_obj + "* " + ty_info.var_name + "_conv = MALLOC(sizeof(" + ty_info.rust_obj + "), \"" + ty_info.rust_obj + "\");\n*" + ty_info.var_name + "_conv = ", ";")
467 ret_conv = (ret_conv[0], ret_conv[1] + "\n*" + ty_info.var_name + "_conv = " + ty_info.rust_obj.replace("LDK", "") + "_clone(" + ty_info.var_name + "_conv);")
469 ret_conv = (ty_info.rust_obj + "* " + ty_info.var_name + "_conv = MALLOC(sizeof(" + ty_info.rust_obj + "), \"" + ty_info.rust_obj + "\");\n*" + ty_info.var_name + "_conv = ", ";")
470 if from_hu_conv is None:
471 from_hu_conv = (ty_info.var_name + " != null ? " + self.consts.get_ptr(ty_info.var_name) + " : " + self.consts.native_zero_ptr, "")
472 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
473 arg_conv = base_conv, arg_conv_name = ty_info.var_name + "_conv", arg_conv_cleanup = None,
474 ret_conv = ret_conv, ret_conv_name = "tag_ptr(" + ty_info.var_name + "_conv, true)",
475 to_hu_conv = self.consts.var_decl_statement(ty_info.java_hu_ty, ty_info.var_name + "_hu_conv", ty_info.java_hu_ty + ".constr_from_ptr(" + ty_info.var_name + ")") + ";",
476 to_hu_conv_name = ty_info.var_name + "_hu_conv", from_hu_conv = from_hu_conv)
477 if ty_info.rust_obj in self.tuple_types:
478 ret_conv_name = "tag_ptr(" + ty_info.var_name + "_conv, "
480 # If we're trying to return a ref, we have to clone.
481 if (ty_info.rust_obj.replace("LDK", "") + "_clone") not in self.clone_fns:
482 ret_conv = (ty_info.rust_obj + "* " + ty_info.var_name + "_conv = &", "")
483 ret_conv = (ret_conv[0], ";\n// WARNING: we really need to clone here, but no clone is available for " + ty_info.rust_obj)
484 ret_conv_name += "false)"
486 ret_conv = (ty_info.rust_obj + "* " + ty_info.var_name + "_conv = MALLOC(sizeof(" + ty_info.rust_obj + "), \"" + ty_info.rust_obj + "\");\n*" + ty_info.var_name + "_conv = ", ";")
487 ret_conv = (ret_conv[0], ret_conv[1] + "\n*" + ty_info.var_name + "_conv = " + ty_info.rust_obj.replace("LDK", "") + "_clone(" + ty_info.var_name + "_conv);")
488 ret_conv_name += "true)"
490 ret_conv = (ty_info.rust_obj + "* " + ty_info.var_name + "_conv = MALLOC(sizeof(" + ty_info.rust_obj + "), \"" + ty_info.rust_obj + "\");\n*" + ty_info.var_name + "_conv = ", ";")
491 ret_conv_name += "true)"
492 if not ty_info.is_ptr or holds_ref:
493 to_hu_conv_sfx = "\n" + self.consts.add_ref(ty_info.var_name + "_hu_conv", "this") + ";"
496 if from_hu_conv is None:
497 from_hu_conv = (ty_info.var_name + " != null ? " + self.consts.get_ptr(ty_info.var_name) + " : " + self.consts.native_zero_ptr, "")
498 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
499 arg_conv = base_conv, arg_conv_name = ty_info.var_name + "_conv", arg_conv_cleanup = None,
500 ret_conv = ret_conv, ret_conv_name = ret_conv_name,
501 to_hu_conv = self.consts.var_decl_statement(ty_info.java_hu_ty, ty_info.var_name + "_hu_conv", "new " + ty_info.java_hu_ty + "(null, " + ty_info.var_name + ")") + ";" + to_hu_conv_sfx,
502 to_hu_conv_name = ty_info.var_name + "_hu_conv", from_hu_conv = from_hu_conv)
504 # The manually-defined types - TxOut, BigEndianScalar, U5, and Error
505 if ty_info.rust_obj == "LDKError":
506 assert from_hu_conv is None
507 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
508 arg_conv = "", arg_conv_name = "(LDKError){ ._dummy = 0 }", arg_conv_cleanup = None,
509 ret_conv = ("/*", "*/"), ret_conv_name = "0",
510 to_hu_conv = self.consts.var_decl_statement(ty_info.java_hu_ty, ty_info.var_name + "_conv", "new " + ty_info.java_hu_ty + "(" + ty_info.var_name + ")") + ";",
511 to_hu_conv_name = ty_info.var_name + "_conv", from_hu_conv = ("0", ""))
513 if ty_info.rust_obj == "LDKU5" or ty_info.rust_obj == "LDKWitnessVersion":
514 assert from_hu_conv is None
515 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
516 arg_conv = "", arg_conv_name = "(" + ty_info.rust_obj + "){ ._0 = " + ty_info.var_name + " }", arg_conv_cleanup = None,
517 ret_conv = ("uint8_t " + ty_info.var_name + "_val = ", "._0;"), ret_conv_name = ty_info.var_name + "_val",
518 to_hu_conv = self.consts.var_decl_statement(ty_info.java_hu_ty, ty_info.var_name + "_conv", "new " + ty_info.java_hu_ty + "(" + ty_info.var_name + ")") + ";",
519 to_hu_conv_name = ty_info.var_name + "_conv", from_hu_conv = (ty_info.var_name + ".getVal()", ""))
521 assert ty_info.rust_obj == "LDKTxOut" or ty_info.rust_obj == "LDKBigEndianScalar"
522 if not ty_info.is_ptr and not holds_ref:
523 ret_conv = (ty_info.rust_obj + "* " + ty_info.var_name + "_ref = MALLOC(sizeof(" + ty_info.rust_obj + "), \"" + ty_info.rust_obj + "\");\n*" + ty_info.var_name + "_ref = ", ";")
524 ret_conv_name = "tag_ptr(" + ty_info.var_name + "_ref, true)"
526 ret_conv = (ty_info.rust_obj + "* " + ty_info.var_name + "_ref = &", ";")
527 ret_conv_name = "tag_ptr(" + ty_info.var_name + "_ref, false)"
528 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
529 arg_conv = base_conv, arg_conv_name = ty_info.var_name + "_conv", arg_conv_cleanup = None,
530 ret_conv = ret_conv, ret_conv_name = ret_conv_name,
531 to_hu_conv = self.consts.var_decl_statement(ty_info.java_hu_ty, ty_info.var_name + "_conv", "new " +ty_info.java_hu_ty + "(null, " + ty_info.var_name + ")") + ";",
532 to_hu_conv_name = ty_info.var_name + "_conv", from_hu_conv = (self.consts.get_ptr(ty_info.var_name), ""))
535 if ty_info.rust_obj in self.complex_enums:
536 ret_conv = (self.consts.ptr_c_ty + " ref_" + ty_info.var_name + " = tag_ptr(", ", false); // WARNING: We should clone here!")
537 from_hu_sfx = self.consts.add_ref("this", ty_info.var_name)
538 if ty_info.rust_obj.replace("LDK", "") + "_clone" in self.clone_fns:
539 ret_conv_pfx = ty_info.rust_obj + " *ret_" + ty_info.var_name + " = MALLOC(sizeof(" + ty_info.rust_obj + "), \"" + ty_info.rust_obj + " ret conversion\");\n"
540 ret_conv_pfx += "*ret_" + ty_info.var_name + " = " + ty_info.rust_obj.replace("LDK", "") + "_clone("
541 ret_conv_sfx = ");\n" + self.consts.ptr_c_ty + " ref_" + ty_info.var_name + " = tag_ptr(ret_" + ty_info.var_name + ", true);"
542 ret_conv = (ret_conv_pfx, ret_conv_sfx)
544 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
545 arg_conv = ty_info.rust_obj + "* " + ty_info.var_name + "_conv = (" + ty_info.rust_obj + "*)untag_ptr(" + ty_info.var_name + ");",
546 arg_conv_name = ty_info.var_name + "_conv", arg_conv_cleanup = None,
547 ret_conv = ret_conv, ret_conv_name = "ref_" + ty_info.var_name,
548 to_hu_conv = self.consts.var_decl_statement(ty_info.java_hu_ty, ty_info.var_name + "_hu_conv", ty_info.java_hu_ty + ".constr_from_ptr(" + ty_info.var_name + ")") + ";",
549 to_hu_conv_name = ty_info.var_name + "_hu_conv",
550 from_hu_conv = (ty_info.var_name + " == null ? " + self.consts.native_zero_ptr + " : " + self.consts.get_ptr(ty_info.var_name), from_hu_sfx))
551 elif ty_info.rust_obj in self.trait_structs:
552 if ty_info.nonnull_ptr:
553 arg_conv = "void* " + ty_info.var_name + "_ptr = untag_ptr(" + ty_info.var_name + ");\n"
554 arg_conv += "if (ptr_is_owned(" + ty_info.var_name + ")) { CHECK_ACCESS(" + ty_info.var_name + "_ptr); }\n"
555 arg_conv += ty_info.rust_obj + "* " + ty_info.var_name + "_conv = (" + ty_info.rust_obj + "*)" + ty_info.var_name + "_ptr;"
556 arg_conv_name = ty_info.var_name + "_conv"
558 # We map Option<Trait> as *mut Trait, which we can differentiate from &Trait by the NONNULL_PTR annotation.
559 # We handle the Option<Trait> case here.
560 arg_conv = ty_info.rust_obj + " *" + ty_info.var_name + "_conv_ptr = NULL;\n"
561 arg_conv += "if (" + ty_info.var_name + " != 0) {\n"
562 arg_conv += "\t" + ty_info.rust_obj + " " + ty_info.var_name + "_conv;\n"
563 arg_conv += "void* " + ty_info.var_name + "_ptr = untag_ptr(" + ty_info.var_name + ");\n"
564 arg_conv += "CHECK_ACCESS(" + ty_info.var_name + "_ptr);\n"
565 arg_conv += "\t" + ty_info.var_name + "_conv = *(" + ty_info.rust_obj + "*)" + ty_info.var_name + "_ptr;"
566 arg_conv += self.consts.trait_struct_inc_refcnt(ty_info).replace("\n", "\n\t")
567 arg_conv += "\n\t" + ty_info.var_name + "_conv_ptr = MALLOC(sizeof(" + ty_info.rust_obj + "), \"" + ty_info.rust_obj + "\");\n"
568 arg_conv += "\t*" + ty_info.var_name + "_conv_ptr = " + ty_info.var_name + "_conv;\n"
570 arg_conv_name = ty_info.var_name + "_conv_ptr"
571 if ty_info.rust_obj.replace("LDK", "") + "_clone" in self.clone_fns:
572 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
573 arg_conv = arg_conv, arg_conv_name = arg_conv_name, arg_conv_cleanup = None,
574 ret_conv = (ty_info.rust_obj + " *" + ty_info.var_name + "_clone = MALLOC(sizeof(" + ty_info.rust_obj + "), \"" + ty_info.rust_obj + "\");\n" +
575 "*" + ty_info.var_name + "_clone = " + ty_info.rust_obj.replace("LDK", "") + "_clone(", ");"),
576 ret_conv_name = "tag_ptr(" + ty_info.var_name + "_clone, true)",
577 to_hu_conv = self.consts.var_decl_statement(ty_info.java_hu_ty, "ret_hu_conv", "new " + ty_info.java_hu_ty + "(null, " + ty_info.var_name + ")") + ";\n" + self.consts.add_ref("ret_hu_conv", "this") + ";",
578 to_hu_conv_name = "ret_hu_conv",
579 from_hu_conv = (ty_info.var_name + " == null ? " + self.consts.native_zero_ptr + " : " + self.consts.get_ptr(ty_info.var_name), ""))
581 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
582 arg_conv = arg_conv, arg_conv_name = arg_conv_name, arg_conv_cleanup = None,
583 ret_conv = ("// WARNING: This object doesn't live past this scope, needs clone!\n" + self.consts.ptr_c_ty + " ret_" + ty_info.var_name + " = tag_ptr(", ", false);"),
584 ret_conv_name = "ret_" + ty_info.var_name,
585 to_hu_conv = self.consts.var_decl_statement(ty_info.java_hu_ty, "ret_hu_conv", "new " + ty_info.java_hu_ty + "(null, " + ty_info.var_name + ")") + ";\n" + self.consts.add_ref("ret_hu_conv", "this") + ";",
586 to_hu_conv_name = "ret_hu_conv",
587 from_hu_conv = (ty_info.var_name + " == null ? " + self.consts.native_zero_ptr + " : " + self.consts.get_ptr(ty_info.var_name), self.consts.add_ref("this", ty_info.var_name)))
588 ret_conv = (self.consts.ptr_c_ty + " ret_" + ty_info.var_name + " = tag_ptr(", ", true);")
590 ret_conv = (ret_conv[0], ", false);")
591 return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
592 arg_conv = ty_info.rust_obj + "* " + ty_info.var_name + "_conv = (" + ty_info.rust_obj + "*)untag_ptr(" + ty_info.var_name + ");",
593 arg_conv_name = ty_info.var_name + "_conv", arg_conv_cleanup = None,
594 ret_conv = ret_conv, ret_conv_name = "ret_" + ty_info.var_name,
595 to_hu_conv = "TODO 3", to_hu_conv_name = None, from_hu_conv = None) # its a pointer, no conv needed
596 assert False # We should have handled every case by now.