_ Git - ldk-java/blob - typescript_strings.py

   1 from bindingstypes import ConvInfo
   2
   3
   4 def first_to_lower(string: str) -> str:
   5     first = string[0]
   6     return first.lower() + string[1:]
   7
   8
   9 class Consts:
  10     def __init__(self, DEBUG):
  11         self.common_base = """
  12             export default class CommonBase {
  13                 ptr: number;
  14                 ptrs_to: object[] = []; // new LinkedList(); TODO: build linked list implementation
  15                 protected constructor(ptr: number) { this.ptr = ptr; }
  16                 public _test_only_get_ptr(): number { return this.ptr; }
  17                 protected finalize() {
  18                     // TODO: finalize myself
  19                 }
  20             }
  21         """
  22
  23         self.c_file_pfx = """#include <rust_types.h>
  24 #include <stdatomic.h>
  25 #include <lightning.h>
  26
  27 // These should be provided...somehow...
  28 void *memset(void *s, int c, size_t n);
  29 void *memcpy(void *dest, const void *src, size_t n);
  30 int memcmp(const void *s1, const void *s2, size_t n);
  31
  32 void __attribute__((noreturn)) abort(void);
  33 void assert(scalar expression);
  34 """
  35
  36         if not DEBUG:
  37             self.c_file_pfx = self.c_file_pfx + """
  38 void *malloc(size_t size);
  39 void free(void *ptr);
  40
  41 #define MALLOC(a, _) malloc(a)
  42 #define FREE(p) if ((long)(p) > 1024) { free(p); }
  43 #define DO_ASSERT(a) (void)(a)
  44 #define CHECK(a)
  45 """
  46         else:
  47             self.c_file_pfx = self.c_file_pfx + """
  48 // Always run a, then assert it is true:
  49 #define DO_ASSERT(a) do { bool _assert_val = (a); assert(_assert_val); } while(0)
  50 // Assert a is true or do nothing
  51 #define CHECK(a) DO_ASSERT(a)
  52
  53 // Running a leak check across all the allocations and frees of the JDK is a mess,
  54 // so instead we implement our own naive leak checker here, relying on the -wrap
  55 // linker option to wrap malloc/calloc/realloc/free, tracking everyhing allocated
  56 // and free'd in Rust or C across the generated bindings shared library.
  57
  58 #define BT_MAX 128
  59 typedef struct allocation {
  60         struct allocation* next;
  61         void* ptr;
  62         const char* struct_name;
  63 } allocation;
  64 static allocation* allocation_ll = NULL;
  65
  66 void* __real_malloc(size_t len);
  67 void* __real_calloc(size_t nmemb, size_t len);
  68 static void new_allocation(void* res, const char* struct_name) {
  69         allocation* new_alloc = __real_malloc(sizeof(allocation));
  70         new_alloc->ptr = res;
  71         new_alloc->struct_name = struct_name;
  72         new_alloc->next = allocation_ll;
  73         allocation_ll = new_alloc;
  74 }
  75 static void* MALLOC(size_t len, const char* struct_name) {
  76         void* res = __real_malloc(len);
  77         new_allocation(res, struct_name);
  78         return res;
  79 }
  80 void __real_free(void* ptr);
  81 static void alloc_freed(void* ptr) {
  82         allocation* p = NULL;
  83         allocation* it = allocation_ll;
  84         while (it->ptr != ptr) {
  85                 p = it; it = it->next;
  86                 if (it == NULL) {
  87                         //XXX: fprintf(stderr, "Tried to free unknown pointer %p\\n", ptr);
  88                         return; // addrsan should catch malloc-unknown and print more info than we have
  89                 }
  90         }
  91         if (p) { p->next = it->next; } else { allocation_ll = it->next; }
  92         DO_ASSERT(it->ptr == ptr);
  93         __real_free(it);
  94 }
  95 static void FREE(void* ptr) {
  96         if ((long)ptr < 1024) return; // Rust loves to create pointers to the NULL page for dummys
  97         alloc_freed(ptr);
  98         __real_free(ptr);
  99 }
 100
 101 void* __wrap_malloc(size_t len) {
 102         void* res = __real_malloc(len);
 103         new_allocation(res, "malloc call");
 104         return res;
 105 }
 106 void* __wrap_calloc(size_t nmemb, size_t len) {
 107         void* res = __real_calloc(nmemb, len);
 108         new_allocation(res, "calloc call");
 109         return res;
 110 }
 111 void __wrap_free(void* ptr) {
 112         if (ptr == NULL) return;
 113         alloc_freed(ptr);
 114         __real_free(ptr);
 115 }
 116
 117 void* __real_realloc(void* ptr, size_t newlen);
 118 void* __wrap_realloc(void* ptr, size_t len) {
 119         if (ptr != NULL) alloc_freed(ptr);
 120         void* res = __real_realloc(ptr, len);
 121         new_allocation(res, "realloc call");
 122         return res;
 123 }
 124 void __wrap_reallocarray(void* ptr, size_t new_sz) {
 125         // Rust doesn't seem to use reallocarray currently
 126         DO_ASSERT(false);
 127 }
 128
 129 void __attribute__((destructor)) check_leaks() {
 130         for (allocation* a = allocation_ll; a != NULL; a = a->next) {
 131                 //XXX: fprintf(stderr, "%s %p remains\\n", a->struct_name, a->ptr);
 132         }
 133         DO_ASSERT(allocation_ll == NULL);
 134 }
 135 """
 136         self.c_file_pfx = self.c_file_pfx + """
 137 // We assume that CVec_u8Z and u8slice are the same size and layout (and thus pointers to the two can be mixed)
 138 _Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKu8slice), "Vec<u8> and [u8] need to have been mapped identically");
 139 _Static_assert(offsetof(LDKCVec_u8Z, data) == offsetof(LDKu8slice, data), "Vec<u8> and [u8] need to have been mapped identically");
 140 _Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKu8slice, datalen), "Vec<u8> and [u8] need to have been mapped identically");
 141
 142 _Static_assert(sizeof(void*) == 4, "Pointers mut be 32 bits");
 143
 144 typedef struct int64_tArray {uint32_t len;int64_t *ptr;} int64_tArray;
 145 typedef struct uint32_tArray {uint32_t len;int32_t *ptr;} uint32_tArray;
 146 typedef struct int8_tArray {uint32_t len;int8_t *ptr;} int8_tArray;
 147
 148 typedef bool jboolean;
 149
 150 """
 151
 152         self.hu_struct_file_prefix = f"""
 153 import CommonBase from './CommonBase';
 154 import * as bindings from '../bindings' // TODO: figure out location
 155
 156 """
 157         self.c_fn_ty_pfx = ""
 158         self.c_fn_name_pfx = ""
 159         self.c_fn_args_pfx = "void* ctx_TODO"
 160         self.file_ext = ".ts"
 161         self.ptr_c_ty = "uint32_t"
 162         self.ptr_native_ty = "uint32_t"
 163         self.result_c_ty = "uint32_t"
 164         self.ptr_arr = "uint32_tArray"
 165         self.get_native_arr_len_call = ("", ".len")
 166         self.get_native_arr_ptr_call = ("", ".ptr")
 167
 168     def release_native_arr_ptr_call(self, arr_var, arr_ptr_var):
 169         return None
 170     def create_native_arr_call(self, arr_len, ty_info):
 171         if ty_info.c_ty == "int8_tArray":
 172             return "{ .len = " + arr_len + ", .ptr = MALLOC(" + arr_len + ", \"Native " + ty_info.c_ty + " Bytes\") }"
 173         elif ty_info.c_ty == "int64_tArray":
 174             return "{ .len = " + arr_len + ", .ptr = MALLOC(" + arr_len + " * sizeof(int64_t), \"Native " + ty_info.c_ty + " Bytes\") }"
 175         elif ty_info.c_ty == "uint32_tArray":
 176             return "{ .len = " + arr_len + ", .ptr = MALLOC(" + arr_len + " * sizeof(int32_t), \"Native " + ty_info.c_ty + " Bytes\") }"
 177         else:
 178             print("Need to create arr!", ty_info.c_ty)
 179             return ty_info.c_ty
 180     def set_native_arr_contents(self, arr_name, arr_len, ty_info):
 181         if ty_info.c_ty == "int8_tArray":
 182             return ("memcpy(" + arr_name + ".ptr, ", ", " + arr_len + ")")
 183         else:
 184             assert False
 185     def get_native_arr_contents(self, arr_name, dest_name, arr_len, ty_info, copy):
 186         if ty_info.c_ty == "int8_tArray":
 187             if copy:
 188                 return "memcpy(" + dest_name + ", " + arr_name + ".ptr, " + arr_len + ")"
 189             else:
 190                 return arr_name + ".ptr"
 191         else:
 192             return "(" + ty_info.subty.c_ty + "*) " + arr_name + ".ptr"
 193     def get_native_arr_elem(self, arr_name, idxc, ty_info):
 194         assert False # Only called if above is None
 195     def cleanup_native_arr_ref_contents(self, arr_name, dest_name, arr_len, ty_info):
 196         if ty_info.c_ty == "int8_tArray":
 197             return None
 198         else:
 199             return None
 200
 201     def init_str(self, c_array_class_caches):
 202         return ""
 203
 204     def native_c_unitary_enum_map(self, struct_name, variants):
 205         out_c = "static inline " + struct_name + " " + struct_name + "_from_js(int32_t ord) {\n"
 206         out_c = out_c + "\tswitch (ord) {\n"
 207         ord_v = 0
 208
 209         out_typescript_enum_fields = ""
 210
 211         for var in variants:
 212             out_c = out_c + "\t\tcase %d: return %s;\n" % (ord_v, var)
 213             ord_v = ord_v + 1
 214             out_typescript_enum_fields += f"{var},\n\t\t\t\t"
 215         out_c = out_c + "\t}\n"
 216         out_c = out_c + "\tabort();\n"
 217         out_c = out_c + "}\n"
 218
 219         out_c = out_c + "static inline int32_t " + struct_name + "_to_js(" + struct_name + " val) {\n"
 220         out_c = out_c + "\tswitch (val) {\n"
 221         ord_v = 0
 222         for var in variants:
 223             out_c = out_c + "\t\tcase " + var + ": return %d;\n" % ord_v
 224             ord_v = ord_v + 1
 225         out_c = out_c + "\t\tdefault: abort();\n"
 226         out_c = out_c + "\t}\n"
 227         out_c = out_c + "}\n"
 228
 229         out_typescript_enum = f"""
 230             export enum {struct_name} {{
 231                 {out_typescript_enum_fields}
 232             }}
 233         """
 234
 235         return (out_c, out_typescript_enum, "")
 236
 237     def c_unitary_enum_to_native_call(self, ty_info):
 238         return (ty_info.rust_obj + "_to_js(", ")")
 239     def native_unitary_enum_to_c_call(self, ty_info):
 240         return (ty_info.rust_obj + "_from_js(", ")")
 241
 242     def c_complex_enum_pass_ty(self, struct_name):
 243         return "uint32_t"
 244
 245     def c_constr_native_complex_enum(self, struct_name, variant, c_params):
 246         ret = "0 /* " + struct_name + " - " + variant + " */"
 247         for param in c_params:
 248             ret = ret + "; (void) " + param
 249         return ret
 250
 251     def native_c_map_trait(self, struct_name, field_var_conversions, field_function_lines):
 252         out_java = "out_java:native_c_map_trait"
 253         out_java_trait = "out_java_trait:native_c_map_trait"
 254         out_c = "out_c:native_c_map_trait"
 255
 256
 257         out_java_trait = ""
 258         out_java = ""
 259
 260         constructor_arguments = ""
 261         super_instantiator = ""
 262         pointer_to_adder = ""
 263         for var in field_var_conversions:
 264             if isinstance(var, ConvInfo):
 265                 constructor_arguments += f", {first_to_lower(var.arg_name)}?: {var.java_hu_ty}"
 266                 if var.from_hu_conv is not None:
 267                     super_instantiator += ", " + var.from_hu_conv[0]
 268                     if var.from_hu_conv[1] != "":
 269                         pointer_to_adder += var.from_hu_conv[1] + ";\n"
 270                 else:
 271                     super_instantiator += ", " + first_to_lower(var.arg_name)
 272             else:
 273                 constructor_arguments += f", {first_to_lower(var[1])}?: bindings.{var[0]}"
 274                 super_instantiator += ", " + first_to_lower(var[1])
 275                 pointer_to_adder += "this.ptrs_to.push(" + first_to_lower(var[1]) + ");\n"
 276
 277         out_java_trait = f"""
 278             {self.hu_struct_file_prefix}
 279
 280             export class {struct_name.replace("LDK","")} extends CommonBase {{
 281
 282                 bindings_instance?: bindings.{struct_name};
 283
 284                 constructor(ptr?: number, arg?: bindings.{struct_name}{constructor_arguments}) {{
 285                     if (Number.isFinite(ptr)) {{
 286                                         super(ptr);
 287                                         this.bindings_instance = null;
 288                                     }} else {{
 289                                         // TODO: private constructor instantiation
 290                                         super(bindings.{struct_name}_new(arg{super_instantiator}));
 291                                         this.ptrs_to.push(arg);
 292                                         {pointer_to_adder}
 293                                     }}
 294                 }}
 295
 296                 protected finalize() {{
 297                     if (this.ptr != 0) {{
 298                         bindings.{struct_name.replace("LDK","")}_free(this.ptr);
 299                     }}
 300                     super.finalize();
 301                 }}
 302
 303             }}
 304         """
 305
 306
 307
 308         java_trait_constr = "\tprivate static class " + struct_name + "Holder { " + struct_name.replace("LDK", "") + " held; }\n"
 309         java_trait_constr = java_trait_constr + "\tpublic static " + struct_name.replace("LDK", "") + " new_impl(" + struct_name.replace("LDK", "") + "Interface arg"
 310         for var in field_var_conversions:
 311             if isinstance(var, ConvInfo):
 312                 java_trait_constr = java_trait_constr + ", " + var.java_hu_ty + " " + var.arg_name
 313             else:
 314                 # Ideally we'd be able to take any instance of the interface, but our C code can only represent
 315                 # Java-implemented version, so we require users pass a Java implementation here :/
 316                 java_trait_constr = java_trait_constr + ", " + var[0].replace("LDK", "") + "." + var[0].replace("LDK", "") + "Interface " + var[1] + "_impl"
 317         java_trait_constr = java_trait_constr + ") {\n\t\tfinal " + struct_name + "Holder impl_holder = new " + struct_name + "Holder();\n"
 318         java_trait_constr = java_trait_constr + "\t\timpl_holder.held = new " + struct_name.replace("LDK", "") + "(new bindings." + struct_name + "() {\n"
 319         out_java_trait = out_java_trait + "\tpublic static interface " + struct_name.replace("LDK", "") + "Interface {\n"
 320         out_java = out_java + "\tpublic interface " + struct_name + " {\n"
 321         java_meths = []
 322         for fn_line in field_function_lines:
 323             java_meth_descr = "("
 324             if fn_line.fn_name != "free" and fn_line.fn_name != "clone":
 325                 out_java = out_java + "\t\t " + fn_line.ret_ty_info.java_ty + " " + fn_line.fn_name + "("
 326                 java_trait_constr = java_trait_constr + "\t\t\t@Override public " + fn_line.ret_ty_info.java_ty + " " + fn_line.fn_name + "("
 327                 out_java_trait = out_java_trait + "\t\t" + fn_line.ret_ty_info.java_hu_ty + " " + fn_line.fn_name + "("
 328
 329                 for idx, arg_conv_info in enumerate(fn_line.args_ty):
 330                     if idx >= 1:
 331                         out_java = out_java + ", "
 332                         java_trait_constr = java_trait_constr + ", "
 333                         out_java_trait = out_java_trait + ", "
 334                     out_java = out_java + arg_conv_info.java_ty + " " + arg_conv_info.arg_name
 335                     out_java_trait = out_java_trait + arg_conv_info.java_hu_ty + " " + arg_conv_info.arg_name
 336                     java_trait_constr = java_trait_constr + arg_conv_info.java_ty + " " + arg_conv_info.arg_name
 337                     java_meth_descr = java_meth_descr + arg_conv_info.java_fn_ty_arg
 338                 java_meth_descr = java_meth_descr + ")" + fn_line.ret_ty_info.java_fn_ty_arg
 339                 java_meths.append((fn_line.fn_name, java_meth_descr))
 340
 341                 out_java = out_java + ");\n"
 342                 out_java_trait = out_java_trait + ");\n"
 343                 java_trait_constr = java_trait_constr + ") {\n"
 344
 345                 for arg_info in fn_line.args_ty:
 346                     if arg_info.to_hu_conv is not None:
 347                         java_trait_constr = java_trait_constr + "\t\t\t\t" + arg_info.to_hu_conv.replace("\n", "\n\t\t\t\t") + "\n"
 348
 349                 if fn_line.ret_ty_info.java_ty != "void":
 350                     java_trait_constr = java_trait_constr + "\t\t\t\t" + fn_line.ret_ty_info.java_hu_ty + " ret = arg." + fn_line.fn_name + "("
 351                 else:
 352                     java_trait_constr = java_trait_constr + "\t\t\t\targ." + fn_line.fn_name + "("
 353
 354                 for idx, arg_info in enumerate(fn_line.args_ty):
 355                     if idx != 0:
 356                         java_trait_constr = java_trait_constr + ", "
 357                     if arg_info.to_hu_conv_name is not None:
 358                         java_trait_constr = java_trait_constr + arg_info.to_hu_conv_name
 359                     else:
 360                         java_trait_constr = java_trait_constr + arg_info.arg_name
 361
 362                 java_trait_constr = java_trait_constr + ");\n"
 363                 if fn_line.ret_ty_info.java_ty != "void":
 364                     if fn_line.ret_ty_info.from_hu_conv is not None:
 365                         java_trait_constr = java_trait_constr + "\t\t\t\t" + fn_line.ret_ty_info.java_ty + " result = " + fn_line.ret_ty_info.from_hu_conv[0] + ";\n"
 366                         if fn_line.ret_ty_info.from_hu_conv[1] != "":
 367                             java_trait_constr = java_trait_constr + "\t\t\t\t" + fn_line.ret_ty_info.from_hu_conv[1].replace("this", "impl_holder.held") + ";\n"
 368                         #if fn_line.ret_ty_info.rust_obj in result_types:
 369                         # XXX: We need to handle this in conversion logic so that its cross-language!
 370                         # Avoid double-free by breaking the result - we should learn to clone these and then we can be safe instead
 371                         #    java_trait_constr = java_trait_constr + "\t\t\t\tret.ptr = 0;\n"
 372                         java_trait_constr = java_trait_constr + "\t\t\t\treturn result;\n"
 373                     else:
 374                         java_trait_constr = java_trait_constr + "\t\t\t\treturn ret;\n"
 375                 java_trait_constr = java_trait_constr + "\t\t\t}\n"
 376         java_trait_constr = java_trait_constr + "\t\t}"
 377         for var in field_var_conversions:
 378             if isinstance(var, ConvInfo):
 379                 java_trait_constr = java_trait_constr + ", " + var.arg_name
 380             else:
 381                 java_trait_constr = java_trait_constr + ", " + var[1] + ".new_impl(" + var[1] + "_impl).bindings_instance"
 382         out_java_trait = out_java_trait + "\t}\n"
 383         out_java_trait = out_java_trait + java_trait_constr + ");\n\t\treturn impl_holder.held;\n\t}\n"
 384
 385         out_java = out_java + "\t}\n"
 386
 387         out_java = out_java + "\tpublic static native long " + struct_name + "_new(" + struct_name + " impl"
 388         for var in field_var_conversions:
 389             if isinstance(var, ConvInfo):
 390                 out_java = out_java + ", " + var.java_ty + " " + var.arg_name
 391             else:
 392                 out_java = out_java + ", " + var[0] + " " + var[1]
 393         out_java = out_java + ");\n"
 394         out_java = out_java + "\tpublic static native " + struct_name + " " + struct_name + "_get_obj_from_jcalls(long val);\n"
 395
 396         # Now that we've written out our java code (and created java_meths), generate C
 397         out_c = "typedef struct " + struct_name + "_JCalls {\n"
 398         out_c = out_c + "\tatomic_size_t refcnt;\n"
 399         out_c = out_c + "\tJavaVM *vm;\n"
 400         out_c = out_c + "\tjweak o;\n"
 401         for var in field_var_conversions:
 402             if isinstance(var, ConvInfo):
 403                 # We're a regular ol' field
 404                 pass
 405             else:
 406                 # We're a supertrait
 407                 out_c = out_c + "\t" + var[0] + "_JCalls* " + var[1] + ";\n"
 408         for fn in field_function_lines:
 409             if fn.fn_name != "free" and fn.fn_name != "clone":
 410                 out_c = out_c + "\tjmethodID " + fn.fn_name + "_meth;\n"
 411         out_c = out_c + "} " + struct_name + "_JCalls;\n"
 412
 413         for fn_line in field_function_lines:
 414             if fn_line.fn_name == "free":
 415                 out_c = out_c + "static void " + struct_name + "_JCalls_free(void* this_arg) {\n"
 416                 out_c = out_c + "\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n"
 417                 out_c = out_c + "\tif (atomic_fetch_sub_explicit(&j_calls->refcnt, 1, memory_order_acquire) == 1) {\n"
 418                 out_c = out_c + "\t\tJNIEnv *env;\n"
 419                 out_c = out_c + "\t\tDO_ASSERT((*j_calls->vm)->GetEnv(j_calls->vm, (void**)&env, JNI_VERSION_1_8) == JNI_OK);\n"
 420                 out_c = out_c + "\t\t(*env)->DeleteWeakGlobalRef(env, j_calls->o);\n"
 421                 out_c = out_c + "\t\tFREE(j_calls);\n"
 422                 out_c = out_c + "\t}\n}\n"
 423
 424         for idx, fn_line in enumerate(field_function_lines):
 425             if fn_line.fn_name != "free" and fn_line.fn_name != "clone":
 426                 assert fn_line.ret_ty_info.ty_info.get_full_rust_ty()[1] == ""
 427                 out_c = out_c + fn_line.ret_ty_info.ty_info.get_full_rust_ty()[0] + " " + fn_line.fn_name + "_jcall("
 428                 if fn_line.self_is_const:
 429                     out_c = out_c + "const void* this_arg"
 430                 else:
 431                     out_c = out_c + "void* this_arg"
 432
 433                 for idx, arg in enumerate(fn_line.args_ty):
 434                     out_c = out_c + ", " + arg.ty_info.get_full_rust_ty()[0] + " " + arg.arg_name + arg.ty_info.get_full_rust_ty()[1]
 435
 436                 out_c = out_c + ") {\n"
 437                 out_c = out_c + "\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n"
 438                 out_c = out_c + "\tJNIEnv *env;\n"
 439                 out_c = out_c + "\tDO_ASSERT((*j_calls->vm)->GetEnv(j_calls->vm, (void**)&env, JNI_VERSION_1_8) == JNI_OK);\n"
 440
 441                 for arg_info in fn_line.args_ty:
 442                     if arg_info.ret_conv is not None:
 443                         out_c = out_c + "\t" + arg_info.ret_conv[0].replace('\n', '\n\t')
 444                         out_c = out_c + arg_info.arg_name
 445                         out_c = out_c + arg_info.ret_conv[1].replace('\n', '\n\t') + "\n"
 446
 447                 out_c = out_c + "\tjobject obj = (*env)->NewLocalRef(env, j_calls->o);\n\tCHECK(obj != NULL);\n"
 448                 if fn_line.ret_ty_info.c_ty.endswith("Array"):
 449                     out_c = out_c + "\t" + fn_line.ret_ty_info.c_ty + " arg = (*env)->CallObjectMethod(env, obj, j_calls->" + fn_line.fn_name + "_meth"
 450                 elif not fn_line.ret_ty_info.passed_as_ptr:
 451                     out_c = out_c + "\treturn (*env)->Call" + fn_line.ret_ty_info.java_ty.title() + "Method(env, obj, j_calls->" + fn_line.fn_name + "_meth"
 452                 else:
 453                     out_c = out_c + "\t" + fn_line.ret_ty_info.rust_obj + "* ret = (" + fn_line.ret_ty_info.rust_obj + "*)(*env)->CallLongMethod(env, obj, j_calls->" + fn_line.fn_name + "_meth"
 454
 455                 for idx, arg_info in enumerate(fn_line.args_ty):
 456                     if arg_info.ret_conv is not None:
 457                         out_c = out_c + ", " + arg_info.ret_conv_name
 458                     else:
 459                         out_c = out_c + ", " + arg_info.arg_name
 460                 out_c = out_c + ");\n"
 461                 if fn_line.ret_ty_info.arg_conv is not None:
 462                     out_c = out_c + "\t" + fn_line.ret_ty_info.arg_conv.replace("\n", "\n\t") + "\n\treturn " + fn_line.ret_ty_info.arg_conv_name + ";\n"
 463
 464                 out_c = out_c + "}\n"
 465
 466         # Write out a clone function whether we need one or not, as we use them in moving to rust
 467         out_c = out_c + "static void* " + struct_name + "_JCalls_clone(const void* this_arg) {\n"
 468         out_c = out_c + "\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n"
 469         out_c = out_c + "\tatomic_fetch_add_explicit(&j_calls->refcnt, 1, memory_order_release);\n"
 470         for var in field_var_conversions:
 471             if not isinstance(var, ConvInfo):
 472                 out_c = out_c + "\tatomic_fetch_add_explicit(&j_calls->" + var[1] + "->refcnt, 1, memory_order_release);\n"
 473         out_c = out_c + "\treturn (void*) this_arg;\n"
 474         out_c = out_c + "}\n"
 475
 476         out_c = out_c + "static inline " + struct_name + " " + struct_name + "_init (" + self.c_fn_args_pfx + ", jobject o"
 477         for var in field_var_conversions:
 478             if isinstance(var, ConvInfo):
 479                 out_c = out_c + ", " + var.c_ty + " " + var.arg_name
 480             else:
 481                 out_c = out_c + ", jobject " + var[1]
 482         out_c = out_c + ") {\n"
 483
 484         out_c = out_c + "\tjclass c = (*env)->GetObjectClass(env, o);\n"
 485         out_c = out_c + "\tCHECK(c != NULL);\n"
 486         out_c = out_c + "\t" + struct_name + "_JCalls *calls = MALLOC(sizeof(" + struct_name + "_JCalls), \"" + struct_name + "_JCalls\");\n"
 487         out_c = out_c + "\tatomic_init(&calls->refcnt, 1);\n"
 488         out_c = out_c + "\tDO_ASSERT((*env)->GetJavaVM(env, &calls->vm) == 0);\n"
 489         out_c = out_c + "\tcalls->o = (*env)->NewWeakGlobalRef(env, o);\n"
 490
 491         for (fn_name, java_meth_descr) in java_meths:
 492             if fn_name != "free" and fn_name != "clone":
 493                 out_c = out_c + "\tcalls->" + fn_name + "_meth = (*env)->GetMethodID(env, c, \"" + fn_name + "\", \"" + java_meth_descr + "\");\n"
 494                 out_c = out_c + "\tCHECK(calls->" + fn_name + "_meth != NULL);\n"
 495
 496         for var in field_var_conversions:
 497             if isinstance(var, ConvInfo) and var.arg_conv is not None:
 498                 out_c = out_c + "\n\t" + var.arg_conv.replace("\n", "\n\t") +"\n"
 499         out_c = out_c + "\n\t" + struct_name + " ret = {\n"
 500         out_c = out_c + "\t\t.this_arg = (void*) calls,\n"
 501         for fn_line in field_function_lines:
 502             if fn_line.fn_name != "free" and fn_line.fn_name != "clone":
 503                 out_c = out_c + "\t\t." + fn_line.fn_name + " = " + fn_line.fn_name + "_jcall,\n"
 504             elif fn_line.fn_name == "free":
 505                 out_c = out_c + "\t\t.free = " + struct_name + "_JCalls_free,\n"
 506             else:
 507                 out_c = out_c + "\t\t.clone = " + struct_name + "_JCalls_clone,\n"
 508         for var in field_var_conversions:
 509             if isinstance(var, ConvInfo):
 510                 if var.arg_conv_name is not None:
 511                     out_c = out_c + "\t\t." + var.arg_name + " = " + var.arg_conv_name + ",\n"
 512                     out_c = out_c + "\t\t.set_" + var.arg_name + " = NULL,\n"
 513                 else:
 514                     out_c = out_c + "\t\t." + var.var_name + " = " + var.var_name + ",\n"
 515                     out_c = out_c + "\t\t.set_" + var.var_name + " = NULL,\n"
 516             else:
 517                 out_c = out_c + "\t\t." + var[1] + " = " + var[0] + "_init(env, clz, " + var[1] + "),\n"
 518         out_c = out_c + "\t};\n"
 519         for var in field_var_conversions:
 520             if not isinstance(var, ConvInfo):
 521                 out_c = out_c + "\tcalls->" + var[1] + " = ret." + var[1] + ".this_arg;\n"
 522         out_c = out_c + "\treturn ret;\n"
 523         out_c = out_c + "}\n"
 524
 525         out_c = out_c + self.c_fn_ty_pfx + "long " + self.c_fn_name_pfx + struct_name.replace("_", "_1") + "_1new (" + self.c_fn_args_pfx + ", jobject o"
 526         for var in field_var_conversions:
 527             if isinstance(var, ConvInfo):
 528                 out_c = out_c + ", " + var.c_ty + " " + var.arg_name
 529             else:
 530                 out_c = out_c + ", jobject " + var[1]
 531         out_c = out_c + ") {\n"
 532         out_c = out_c + "\t" + struct_name + " *res_ptr = MALLOC(sizeof(" + struct_name + "), \"" + struct_name + "\");\n"
 533         out_c = out_c + "\t*res_ptr = " + struct_name + "_init(env, clz, o"
 534         for var in field_var_conversions:
 535             if isinstance(var, ConvInfo):
 536                 out_c = out_c + ", " + var.arg_name
 537             else:
 538                 out_c = out_c + ", " + var[1]
 539         out_c = out_c + ");\n"
 540         out_c = out_c + "\treturn (long)res_ptr;\n"
 541         out_c = out_c + "}\n"
 542
 543         out_c = out_c + self.c_fn_ty_pfx + "jobject " + self.c_fn_name_pfx + struct_name.replace("_", "_1") + "_1get_1obj_1from_1jcalls (" + self.c_fn_args_pfx + ", " + self.ptr_c_ty + " val) {\n"
 544         out_c = out_c + "\tjobject ret = (*env)->NewLocalRef(env, ((" + struct_name + "_JCalls*)val)->o);\n"
 545         out_c = out_c + "\tCHECK(ret != NULL);\n"
 546         out_c = out_c + "\treturn ret;\n"
 547         out_c = out_c + "}\n"
 548
 549
 550         return (out_java, out_java_trait, out_c)
 551
 552     def map_complex_enum(self, struct_name, variant_list, camel_to_snake):
 553         java_hu_type = struct_name.replace("LDK", "")
 554
 555         out_java_enum = ""
 556         out_java = ""
 557         out_c = ""
 558
 559         out_java_enum += (self.hu_struct_file_prefix)
 560         out_java_enum += ("export default class " + java_hu_type + " extends CommonBase {\n")
 561         out_java_enum += ("\tprotected constructor(_dummy: object, ptr: number) { super(ptr); }\n")
 562         out_java_enum += ("\tprotected finalize() {\n")
 563         out_java_enum += ("\t\tsuper.finalize();\n")
 564         out_java_enum += ("\t\tif (this.ptr != 0) { bindings." + java_hu_type + "_free(this.ptr); }\n")
 565         out_java_enum += ("\t}\n")
 566         out_java_enum += f"\tstatic constr_from_ptr(ptr: number): {java_hu_type} {{\n"
 567         out_java_enum += (f"\t\tconst raw_val: bindings.{struct_name} = bindings." + struct_name + "_ref_from_ptr(ptr);\n")
 568         java_hu_subclasses = ""
 569
 570         out_java +=  ("\tpublic static class " + struct_name + " {\n")
 571         out_java +=  ("\t\tprivate " + struct_name + "() {}\n")
 572         for var in variant_list:
 573             out_java +=  ("\t\texport class " + var.var_name + " extends " + struct_name + " {\n")
 574             java_hu_subclasses = java_hu_subclasses + "export class " + var.var_name + " extends " + java_hu_type + " {\n"
 575             out_java_enum += ("\t\tif (raw_val instanceof bindings." + struct_name + "." + var.var_name + ") {\n")
 576             out_java_enum += ("\t\t\treturn new " + var.var_name + "(this.ptr, raw_val);\n")
 577             init_meth_params = ""
 578             init_meth_body = ""
 579             hu_conv_body = ""
 580             for idx, field_ty in enumerate(var.fields):
 581                 out_java += ("\t\t\tpublic " + field_ty.java_ty + " " + field_ty.arg_name + ";\n")
 582                 java_hu_subclasses = java_hu_subclasses + "\tpublic " + field_ty.arg_name + f": {field_ty.java_hu_ty};\n"
 583                 if field_ty.to_hu_conv is not None:
 584                     hu_conv_body = hu_conv_body + "\t\tconst " + field_ty.arg_name + f": {field_ty.java_ty} = obj." + field_ty.arg_name + ";\n"
 585                     hu_conv_body = hu_conv_body + "\t\t" + field_ty.to_hu_conv.replace("\n", "\n\t\t\t") + "\n"
 586                     hu_conv_body = hu_conv_body + "\t\tthis." + field_ty.arg_name + " = " + field_ty.to_hu_conv_name + ";\n"
 587                 else:
 588                     hu_conv_body = hu_conv_body + "\t\tthis." + field_ty.arg_name + " = obj." + field_ty.arg_name + ";\n"
 589                 if idx > 0:
 590                     init_meth_params = init_meth_params + ", "
 591                 init_meth_params = init_meth_params + field_ty.java_ty + " " + field_ty.arg_name
 592                 init_meth_body = init_meth_body + "this." + field_ty.arg_name + " = " + field_ty.arg_name + "; "
 593             out_java +=  ("\t\t\t" + var.var_name + "(" + init_meth_params + ") { ")
 594             out_java +=  (init_meth_body)
 595             out_java +=  ("}\n")
 596             out_java += ("\t\t}\n")
 597             out_java_enum += ("\t\t}\n")
 598             java_hu_subclasses = java_hu_subclasses + "\tprivate constructor(ptr: number, obj: bindings." + struct_name + "." + var.var_name + ") {\n\t\tsuper(null, ptr);\n"
 599             java_hu_subclasses = java_hu_subclasses + hu_conv_body
 600             java_hu_subclasses = java_hu_subclasses + "\t}\n}\n"
 601         out_java += ("\t\tstatic native void init();\n")
 602         out_java += ("\t}\n")
 603         out_java_enum += ("\t\tthrow new Error('oops, this should be unreachable'); // Unreachable without extending the (internal) bindings interface\n\t}\n\n")
 604         out_java += ("\tstatic { " + struct_name + ".init(); }\n")
 605         out_java += ("\tpublic static native " + struct_name + " " + struct_name + "_ref_from_ptr(long ptr);\n");
 606
 607         out_c += (self.c_fn_ty_pfx + self.c_complex_enum_pass_ty(struct_name) + " " + self.c_fn_name_pfx + struct_name.replace("_", "_1") + "_1ref_1from_1ptr (" + self.c_fn_args_pfx + ", " + self.ptr_c_ty + " ptr) {\n")
 608         out_c += ("\t" + struct_name + " *obj = (" + struct_name + "*)ptr;\n")
 609         out_c += ("\tswitch(obj->tag) {\n")
 610         for var in variant_list:
 611             out_c += ("\t\tcase " + struct_name + "_" + var.var_name + ": {\n")
 612             c_params = []
 613             for idx, field_map in enumerate(var.fields):
 614                 if field_map.ret_conv is not None:
 615                     out_c += ("\t\t\t" + field_map.ret_conv[0].replace("\n", "\n\t\t\t"))
 616                     out_c += ("obj->" + camel_to_snake(var.var_name) + "." + field_map.arg_name)
 617                     out_c += (field_map.ret_conv[1].replace("\n", "\n\t\t\t") + "\n")
 618                     c_params.append(field_map.ret_conv_name)
 619                 else:
 620                     c_params.append("obj->" + camel_to_snake(var.var_name) + "." + field_map.arg_name)
 621             out_c += ("\t\t\treturn " + self.c_constr_native_complex_enum(struct_name, var.var_name, c_params) + ";\n")
 622             out_c += ("\t\t}\n")
 623         out_c += ("\t\tdefault: abort();\n")
 624         out_c += ("\t}\n}\n")
 625         out_java_enum += ("}\n")
 626         out_java_enum += (java_hu_subclasses)
 627         return (out_java, out_java_enum, out_c)