_ 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
  12         self.c_type_map = dict(
  13             uint8_t = ['number', 'Uint8Array'],
  14             uint16_t = ['number', 'Uint16Array'],
  15             uint32_t = ['number', 'Uint32Array'],
  16             long = ['number'],
  17         )
  18
  19         self.to_hu_conv_templates = dict(
  20             ptr = 'const {var_name}_hu_conv: {human_type} = new {human_type}(null, {var_name});',
  21             default = 'const {var_name}_hu_conv: {human_type} = new {human_type}(null, {var_name});',
  22         )
  23
  24         self.bindings_header = """
  25
  26 const path = require('path').join(__dirname, 'bindings.wasm');
  27 const bytes = require('fs').readFileSync(path);
  28 let imports = {};
  29 // add all exports to dictionary and move down?
  30 // use `module.exports`?
  31 // imports['./bindings.js'] = require('./bindings.js');
  32
  33 const wasmModule = new WebAssembly.Module(bytes);
  34 const wasmInstance = new WebAssembly.Instance(wasmModule, imports);
  35 // module.exports = wasmInstance.exports;
  36 const wasm = wasmInstance.exports;
  37
  38 export class VecOrSliceDef {
  39     public dataptr: number;
  40     public datalen: number;
  41     public stride: number;
  42     public constructor(dataptr: number, datalen: number, stride: number) {
  43         this.dataptr = dataptr;
  44         this.datalen = datalen;
  45         this.stride = stride;
  46     }
  47 }
  48
  49 /*
  50 TODO: load WASM file
  51 static {
  52     System.loadLibrary(\"lightningjni\");
  53     init(java.lang.Enum.class, VecOrSliceDef.class);
  54     init_class_cache();
  55 }
  56
  57 static native void init(java.lang.Class c, java.lang.Class slicedef);
  58 static native void init_class_cache();
  59
  60 public static native boolean deref_bool(long ptr);
  61 public static native long deref_long(long ptr);
  62 public static native void free_heap_ptr(long ptr);
  63 public static native byte[] read_bytes(long ptr, long len);
  64 public static native byte[] get_u8_slice_bytes(long slice_ptr);
  65 public static native long bytes_to_u8_vec(byte[] bytes);
  66 public static native long new_txpointer_copy_data(byte[] txdata);
  67 public static native void txpointer_free(long ptr);
  68 public static native byte[] txpointer_get_buffer(long ptr);
  69 public static native long vec_slice_len(long vec);
  70 public static native long new_empty_slice_vec();
  71 */
  72
  73 """
  74
  75         self.common_base = """
  76             export default class CommonBase {
  77                 ptr: number;
  78                 ptrs_to: object[] = []; // new LinkedList(); TODO: build linked list implementation
  79                 protected constructor(ptr: number) { this.ptr = ptr; }
  80                 public _test_only_get_ptr(): number { return this.ptr; }
  81                 protected finalize() {
  82                     // TODO: finalize myself
  83                 }
  84             }
  85         """
  86
  87         self.c_file_pfx = """#include <rust_types.h>
  88 #include <stdatomic.h>
  89 #include <lightning.h>
  90
  91 // These should be provided...somehow...
  92 void *memset(void *s, int c, size_t n);
  93 void *memcpy(void *dest, const void *src, size_t n);
  94 int memcmp(const void *s1, const void *s2, size_t n);
  95
  96 void __attribute__((noreturn)) abort(void);
  97 void assert(scalar expression);
  98 """
  99
 100         if not DEBUG:
 101             self.c_file_pfx = self.c_file_pfx + """
 102 void *malloc(size_t size);
 103 void free(void *ptr);
 104
 105 #define MALLOC(a, _) malloc(a)
 106 #define FREE(p) if ((long)(p) > 1024) { free(p); }
 107 #define DO_ASSERT(a) (void)(a)
 108 #define CHECK(a)
 109 """
 110         else:
 111             self.c_file_pfx = self.c_file_pfx + """
 112 // Always run a, then assert it is true:
 113 #define DO_ASSERT(a) do { bool _assert_val = (a); assert(_assert_val); } while(0)
 114 // Assert a is true or do nothing
 115 #define CHECK(a) DO_ASSERT(a)
 116
 117 // Running a leak check across all the allocations and frees of the JDK is a mess,
 118 // so instead we implement our own naive leak checker here, relying on the -wrap
 119 // linker option to wrap malloc/calloc/realloc/free, tracking everyhing allocated
 120 // and free'd in Rust or C across the generated bindings shared library.
 121
 122 #define BT_MAX 128
 123 typedef struct allocation {
 124         struct allocation* next;
 125         void* ptr;
 126         const char* struct_name;
 127 } allocation;
 128 static allocation* allocation_ll = NULL;
 129
 130 void* __real_malloc(size_t len);
 131 void* __real_calloc(size_t nmemb, size_t len);
 132 static void new_allocation(void* res, const char* struct_name) {
 133         allocation* new_alloc = __real_malloc(sizeof(allocation));
 134         new_alloc->ptr = res;
 135         new_alloc->struct_name = struct_name;
 136         new_alloc->next = allocation_ll;
 137         allocation_ll = new_alloc;
 138 }
 139 static void* MALLOC(size_t len, const char* struct_name) {
 140         void* res = __real_malloc(len);
 141         new_allocation(res, struct_name);
 142         return res;
 143 }
 144 void __real_free(void* ptr);
 145 static void alloc_freed(void* ptr) {
 146         allocation* p = NULL;
 147         allocation* it = allocation_ll;
 148         while (it->ptr != ptr) {
 149                 p = it; it = it->next;
 150                 if (it == NULL) {
 151                         //XXX: fprintf(stderr, "Tried to free unknown pointer %p\\n", ptr);
 152                         return; // addrsan should catch malloc-unknown and print more info than we have
 153                 }
 154         }
 155         if (p) { p->next = it->next; } else { allocation_ll = it->next; }
 156         DO_ASSERT(it->ptr == ptr);
 157         __real_free(it);
 158 }
 159 static void FREE(void* ptr) {
 160         if ((long)ptr < 1024) return; // Rust loves to create pointers to the NULL page for dummys
 161         alloc_freed(ptr);
 162         __real_free(ptr);
 163 }
 164
 165 void* __wrap_malloc(size_t len) {
 166         void* res = __real_malloc(len);
 167         new_allocation(res, "malloc call");
 168         return res;
 169 }
 170 void* __wrap_calloc(size_t nmemb, size_t len) {
 171         void* res = __real_calloc(nmemb, len);
 172         new_allocation(res, "calloc call");
 173         return res;
 174 }
 175 void __wrap_free(void* ptr) {
 176         if (ptr == NULL) return;
 177         alloc_freed(ptr);
 178         __real_free(ptr);
 179 }
 180
 181 void* __real_realloc(void* ptr, size_t newlen);
 182 void* __wrap_realloc(void* ptr, size_t len) {
 183         if (ptr != NULL) alloc_freed(ptr);
 184         void* res = __real_realloc(ptr, len);
 185         new_allocation(res, "realloc call");
 186         return res;
 187 }
 188 void __wrap_reallocarray(void* ptr, size_t new_sz) {
 189         // Rust doesn't seem to use reallocarray currently
 190         DO_ASSERT(false);
 191 }
 192
 193 void __attribute__((destructor)) check_leaks() {
 194         for (allocation* a = allocation_ll; a != NULL; a = a->next) {
 195                 //XXX: fprintf(stderr, "%s %p remains\\n", a->struct_name, a->ptr);
 196         }
 197         DO_ASSERT(allocation_ll == NULL);
 198 }
 199 """
 200         self.c_file_pfx = self.c_file_pfx + """
 201 // We assume that CVec_u8Z and u8slice are the same size and layout (and thus pointers to the two can be mixed)
 202 _Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKu8slice), "Vec<u8> and [u8] need to have been mapped identically");
 203 _Static_assert(offsetof(LDKCVec_u8Z, data) == offsetof(LDKu8slice, data), "Vec<u8> and [u8] need to have been mapped identically");
 204 _Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKu8slice, datalen), "Vec<u8> and [u8] need to have been mapped identically");
 205
 206 _Static_assert(sizeof(void*) == 4, "Pointers mut be 32 bits");
 207
 208 typedef struct int64_tArray {uint32_t len;int64_t *ptr;} int64_tArray;
 209 typedef struct uint32_tArray {uint32_t len;int32_t *ptr;} uint32_tArray;
 210 typedef struct int8_tArray {uint32_t len;int8_t *ptr;} int8_tArray;
 211
 212 typedef bool jboolean;
 213
 214 """
 215
 216         self.hu_struct_file_prefix = f"""
 217 import CommonBase from './CommonBase';
 218 import * as bindings from '../bindings' // TODO: figure out location
 219
 220 """
 221         self.c_fn_ty_pfx = ""
 222         self.c_fn_name_pfx = ""
 223         self.c_fn_args_pfx = "void* ctx_TODO"
 224         self.file_ext = ".ts"
 225         self.ptr_c_ty = "uint32_t"
 226         self.ptr_native_ty = "uint32_t"
 227         self.result_c_ty = "uint32_t"
 228         self.ptr_arr = "uint32_tArray"
 229         self.get_native_arr_len_call = ("", ".len")
 230         self.get_native_arr_ptr_call = ("", ".ptr")
 231
 232     def release_native_arr_ptr_call(self, arr_var, arr_ptr_var):
 233         return None
 234     def create_native_arr_call(self, arr_len, ty_info):
 235         if ty_info.c_ty == "int8_tArray":
 236             return "{ .len = " + arr_len + ", .ptr = MALLOC(" + arr_len + ", \"Native " + ty_info.c_ty + " Bytes\") }"
 237         elif ty_info.c_ty == "int64_tArray":
 238             return "{ .len = " + arr_len + ", .ptr = MALLOC(" + arr_len + " * sizeof(int64_t), \"Native " + ty_info.c_ty + " Bytes\") }"
 239         elif ty_info.c_ty == "uint32_tArray":
 240             return "{ .len = " + arr_len + ", .ptr = MALLOC(" + arr_len + " * sizeof(int32_t), \"Native " + ty_info.c_ty + " Bytes\") }"
 241         else:
 242             print("Need to create arr!", ty_info.c_ty)
 243             return ty_info.c_ty
 244     def set_native_arr_contents(self, arr_name, arr_len, ty_info):
 245         if ty_info.c_ty == "int8_tArray":
 246             return ("memcpy(" + arr_name + ".ptr, ", ", " + arr_len + ")")
 247         else:
 248             assert False
 249     def get_native_arr_contents(self, arr_name, dest_name, arr_len, ty_info, copy):
 250         if ty_info.c_ty == "int8_tArray":
 251             if copy:
 252                 return "memcpy(" + dest_name + ", " + arr_name + ".ptr, " + arr_len + ")"
 253             else:
 254                 return arr_name + ".ptr"
 255         else:
 256             return "(" + ty_info.subty.c_ty + "*) " + arr_name + ".ptr"
 257     def get_native_arr_elem(self, arr_name, idxc, ty_info):
 258         assert False # Only called if above is None
 259     def cleanup_native_arr_ref_contents(self, arr_name, dest_name, arr_len, ty_info):
 260         if ty_info.c_ty == "int8_tArray":
 261             return None
 262         else:
 263             return None
 264
 265     def init_str(self, c_array_class_caches):
 266         return ""
 267
 268     def native_c_unitary_enum_map(self, struct_name, variants):
 269         out_c = "static inline " + struct_name + " " + struct_name + "_from_js(int32_t ord) {\n"
 270         out_c = out_c + "\tswitch (ord) {\n"
 271         ord_v = 0
 272
 273         out_typescript_enum_fields = ""
 274
 275         for var in variants:
 276             out_c = out_c + "\t\tcase %d: return %s;\n" % (ord_v, var)
 277             ord_v = ord_v + 1
 278             out_typescript_enum_fields += f"{var},\n\t\t\t\t"
 279         out_c = out_c + "\t}\n"
 280         out_c = out_c + "\tabort();\n"
 281         out_c = out_c + "}\n"
 282
 283         out_c = out_c + "static inline int32_t " + struct_name + "_to_js(" + struct_name + " val) {\n"
 284         out_c = out_c + "\tswitch (val) {\n"
 285         ord_v = 0
 286         for var in variants:
 287             out_c = out_c + "\t\tcase " + var + ": return %d;\n" % ord_v
 288             ord_v = ord_v + 1
 289         out_c = out_c + "\t\tdefault: abort();\n"
 290         out_c = out_c + "\t}\n"
 291         out_c = out_c + "}\n"
 292
 293         out_typescript_enum = f"""
 294             export enum {struct_name} {{
 295                 {out_typescript_enum_fields}
 296             }}
 297         """
 298
 299         return (out_c, out_typescript_enum, "")
 300
 301     def c_unitary_enum_to_native_call(self, ty_info):
 302         return (ty_info.rust_obj + "_to_js(", ")")
 303     def native_unitary_enum_to_c_call(self, ty_info):
 304         return (ty_info.rust_obj + "_from_js(", ")")
 305
 306     def c_complex_enum_pass_ty(self, struct_name):
 307         return "uint32_t"
 308
 309     def c_constr_native_complex_enum(self, struct_name, variant, c_params):
 310         ret = "0 /* " + struct_name + " - " + variant + " */"
 311         for param in c_params:
 312             ret = ret + "; (void) " + param
 313         return ret
 314
 315     def native_c_map_trait(self, struct_name, field_var_conversions, field_function_lines):
 316         out_typescript_bindings = "\n\n\n// OUT_TYPESCRIPT_BINDINGS :: MAP_TRAIT :: START\n\n"
 317
 318         constructor_arguments = ""
 319         super_instantiator = ""
 320         pointer_to_adder = ""
 321         impl_constructor_arguments = ""
 322         for var in field_var_conversions:
 323             if isinstance(var, ConvInfo):
 324                 constructor_arguments += f", {first_to_lower(var.arg_name)}?: {var.java_hu_ty}"
 325                 impl_constructor_arguments += f", {var.arg_name}: {var.java_hu_ty}"
 326                 if var.from_hu_conv is not None:
 327                     super_instantiator += ", " + var.from_hu_conv[0]
 328                     if var.from_hu_conv[1] != "":
 329                         pointer_to_adder += var.from_hu_conv[1] + ";\n"
 330                 else:
 331                     super_instantiator += ", " + first_to_lower(var.arg_name)
 332             else:
 333                 constructor_arguments += f", {first_to_lower(var[1])}?: bindings.{var[0]}"
 334                 super_instantiator += ", " + first_to_lower(var[1])
 335                 pointer_to_adder += "this.ptrs_to.push(" + first_to_lower(var[1]) + ");\n"
 336                 impl_constructor_arguments += f", {first_to_lower(var[1])}_impl: {var[0].replace('LDK', '')}.{var[0].replace('LDK', '')}Interface"
 337
 338         # BUILD INTERFACE METHODS
 339         out_java_interface = ""
 340         out_interface_implementation_overrides = ""
 341         java_methods = []
 342         for fn_line in field_function_lines:
 343             java_method_descriptor = ""
 344             if fn_line.fn_name != "free" and fn_line.fn_name != "clone":
 345                 out_java_interface += fn_line.fn_name + "("
 346                 out_interface_implementation_overrides += f"{fn_line.fn_name} ("
 347
 348                 for idx, arg_conv_info in enumerate(fn_line.args_ty):
 349                     if idx >= 1:
 350                         out_java_interface += ", "
 351                         out_interface_implementation_overrides += ", "
 352                     out_java_interface += f"{arg_conv_info.arg_name}: {arg_conv_info.java_hu_ty}"
 353                     out_interface_implementation_overrides += f"{arg_conv_info.arg_name}: {arg_conv_info.java_ty}"
 354                     java_method_descriptor += arg_conv_info.java_fn_ty_arg
 355                 out_java_interface += f"): {fn_line.ret_ty_info.java_hu_ty};\n\t\t\t\t"
 356                 java_method_descriptor += ")" + fn_line.ret_ty_info.java_fn_ty_arg
 357                 java_methods.append((fn_line.fn_name, java_method_descriptor))
 358
 359                 out_interface_implementation_overrides += f"): {fn_line.ret_ty_info.java_ty} {{\n"
 360
 361                 interface_method_override_inset = "\t\t\t\t\t\t"
 362                 interface_implementation_inset = "\t\t\t\t\t\t\t"
 363                 for arg_info in fn_line.args_ty:
 364                     if arg_info.to_hu_conv is not None:
 365                         out_interface_implementation_overrides += interface_implementation_inset + arg_info.to_hu_conv.replace("\n", "\n\t\t\t\t") + "\n"
 366
 367                 if fn_line.ret_ty_info.java_ty != "void":
 368                     out_interface_implementation_overrides += interface_implementation_inset + fn_line.ret_ty_info.java_hu_ty + " ret = arg." + fn_line.fn_name + "("
 369                 else:
 370                     out_interface_implementation_overrides += f"{interface_implementation_inset}arg." + fn_line.fn_name + "("
 371
 372                 for idx, arg_info in enumerate(fn_line.args_ty):
 373                     if idx != 0:
 374                         out_interface_implementation_overrides += ", "
 375                     if arg_info.to_hu_conv_name is not None:
 376                         out_interface_implementation_overrides += arg_info.to_hu_conv_name
 377                     else:
 378                         out_interface_implementation_overrides += arg_info.arg_name
 379
 380                 out_interface_implementation_overrides += ");\n"
 381                 if fn_line.ret_ty_info.java_ty != "void":
 382                     if fn_line.ret_ty_info.from_hu_conv is not None:
 383                         out_interface_implementation_overrides = out_interface_implementation_overrides + "\t\t\t\t" + f"result: {fn_line.ret_ty_info.java_ty} = " + fn_line.ret_ty_info.from_hu_conv[0] + ";\n"
 384                         if fn_line.ret_ty_info.from_hu_conv[1] != "":
 385                             out_interface_implementation_overrides = out_interface_implementation_overrides + "\t\t\t\t" + fn_line.ret_ty_info.from_hu_conv[1].replace("this", "impl_holder.held") + ";\n"
 386                         #if fn_line.ret_ty_info.rust_obj in result_types:
 387                         # XXX: We need to handle this in conversion logic so that its cross-language!
 388                         # Avoid double-free by breaking the result - we should learn to clone these and then we can be safe instead
 389                         #    out_interface_implementation_overrides = out_interface_implementation_overrides + "\t\t\t\tret.ptr = 0;\n"
 390                         out_interface_implementation_overrides = out_interface_implementation_overrides + "\t\t\t\treturn result;\n"
 391                     else:
 392                         out_interface_implementation_overrides = out_interface_implementation_overrides + "\t\t\t\treturn ret;\n"
 393                 out_interface_implementation_overrides += f"{interface_method_override_inset}}},\n\n{interface_method_override_inset}"
 394
 395         trait_constructor_arguments = ""
 396         for var in field_var_conversions:
 397             if isinstance(var, ConvInfo):
 398                 trait_constructor_arguments += ", " + var.arg_name
 399             else:
 400                 trait_constructor_arguments += ", " + var[1] + ".new_impl(" + var[1] + "_impl).bindings_instance"
 401
 402
 403
 404         out_typescript_human = f"""
 405             {self.hu_struct_file_prefix}
 406
 407             export class {struct_name.replace("LDK","")} extends CommonBase {{
 408
 409                 bindings_instance?: bindings.{struct_name};
 410
 411                 constructor(ptr?: number, arg?: bindings.{struct_name}{constructor_arguments}) {{
 412                     if (Number.isFinite(ptr)) {{
 413                                         super(ptr);
 414                                         this.bindings_instance = null;
 415                                     }} else {{
 416                                         // TODO: private constructor instantiation
 417                                         super(bindings.{struct_name}_new(arg{super_instantiator}));
 418                                         this.ptrs_to.push(arg);
 419                                         {pointer_to_adder}
 420                                     }}
 421                 }}
 422
 423                 protected finalize() {{
 424                     if (this.ptr != 0) {{
 425                         bindings.{struct_name.replace("LDK","")}_free(this.ptr);
 426                     }}
 427                     super.finalize();
 428                 }}
 429
 430                 static new_impl(arg: {struct_name.replace("LDK", "")}Interface{impl_constructor_arguments}): {struct_name.replace("LDK", "")} {{
 431                     const impl_holder: {struct_name}Holder = new {struct_name}Holder();
 432                     let structImplementation = <bindings.{struct_name}>{{
 433
 434                         // todo: in-line interface filling
 435
 436                         {out_interface_implementation_overrides}
 437                     }};
 438                     impl_holder.held = new {struct_name.replace("LDK", "")} (null, structImplementation{trait_constructor_arguments});
 439                 }}
 440
 441             }}
 442
 443             export interface {struct_name.replace("LDK", "")}Interface {{
 444                 {out_java_interface}
 445             }}
 446
 447             class {struct_name}Holder {{
 448                 held: {struct_name.replace("LDK", "")};
 449             }}
 450
 451         """
 452
 453
 454
 455         out_typescript_bindings += "\t\texport interface " + struct_name + " {\n"
 456         java_meths = []
 457         for fn_line in field_function_lines:
 458             if fn_line.fn_name != "free" and fn_line.fn_name != "clone":
 459                 out_typescript_bindings += f"\t\t\t{fn_line.fn_name} ("
 460
 461                 for idx, arg_conv_info in enumerate(fn_line.args_ty):
 462                     if idx >= 1:
 463                         out_typescript_bindings = out_typescript_bindings + ", "
 464                     out_typescript_bindings += f"{arg_conv_info.arg_name}: {arg_conv_info.java_ty}"
 465
 466                 out_typescript_bindings += f"): {fn_line.ret_ty_info.java_ty};\n"
 467
 468         out_typescript_bindings = out_typescript_bindings + "\t\t}\n\n"
 469
 470         out_typescript_bindings += f"\t\texport function {struct_name}_new(impl: {struct_name}"
 471         for var in field_var_conversions:
 472             if isinstance(var, ConvInfo):
 473                 out_typescript_bindings += f", {var.arg_name}: {var.java_ty}"
 474             else:
 475                 out_typescript_bindings += f", {var[1]}: {var[0]}"
 476
 477         out_typescript_bindings += f"""): number {{
 478             throw new Error('unimplemented'); // TODO: bind to WASM
 479         }}
 480
 481         export function {struct_name}_get_obj_from_jcalls(val: number): {struct_name} {{
 482             throw new Error('unimplemented'); // TODO: bind to WASM
 483         }}
 484         """
 485
 486         out_typescript_bindings += '\n// OUT_TYPESCRIPT_BINDINGS :: MAP_TRAIT :: END\n\n\n'
 487
 488         # Now that we've written out our java code (and created java_meths), generate C
 489         out_c = "typedef struct " + struct_name + "_JCalls {\n"
 490         out_c = out_c + "\tatomic_size_t refcnt;\n"
 491         out_c = out_c + "\tJavaVM *vm;\n"
 492         out_c = out_c + "\tjweak o;\n"
 493         for var in field_var_conversions:
 494             if isinstance(var, ConvInfo):
 495                 # We're a regular ol' field
 496                 pass
 497             else:
 498                 # We're a supertrait
 499                 out_c = out_c + "\t" + var[0] + "_JCalls* " + var[1] + ";\n"
 500         for fn in field_function_lines:
 501             if fn.fn_name != "free" and fn.fn_name != "clone":
 502                 out_c = out_c + "\tjmethodID " + fn.fn_name + "_meth;\n"
 503         out_c = out_c + "} " + struct_name + "_JCalls;\n"
 504
 505         for fn_line in field_function_lines:
 506             if fn_line.fn_name == "free":
 507                 out_c = out_c + "static void " + struct_name + "_JCalls_free(void* this_arg) {\n"
 508                 out_c = out_c + "\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n"
 509                 out_c = out_c + "\tif (atomic_fetch_sub_explicit(&j_calls->refcnt, 1, memory_order_acquire) == 1) {\n"
 510                 out_c = out_c + "\t\tJNIEnv *env;\n"
 511                 out_c = out_c + "\t\tDO_ASSERT((*j_calls->vm)->GetEnv(j_calls->vm, (void**)&env, JNI_VERSION_1_8) == JNI_OK);\n"
 512                 out_c = out_c + "\t\t(*env)->DeleteWeakGlobalRef(env, j_calls->o);\n"
 513                 out_c = out_c + "\t\tFREE(j_calls);\n"
 514                 out_c = out_c + "\t}\n}\n"
 515
 516         for idx, fn_line in enumerate(field_function_lines):
 517             if fn_line.fn_name != "free" and fn_line.fn_name != "clone":
 518                 assert fn_line.ret_ty_info.ty_info.get_full_rust_ty()[1] == ""
 519                 out_c = out_c + fn_line.ret_ty_info.ty_info.get_full_rust_ty()[0] + " " + fn_line.fn_name + "_jcall("
 520                 if fn_line.self_is_const:
 521                     out_c = out_c + "const void* this_arg"
 522                 else:
 523                     out_c = out_c + "void* this_arg"
 524
 525                 for idx, arg in enumerate(fn_line.args_ty):
 526                     out_c = out_c + ", " + arg.ty_info.get_full_rust_ty()[0] + " " + arg.arg_name + arg.ty_info.get_full_rust_ty()[1]
 527
 528                 out_c = out_c + ") {\n"
 529                 out_c = out_c + "\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n"
 530                 out_c = out_c + "\tJNIEnv *env;\n"
 531                 out_c = out_c + "\tDO_ASSERT((*j_calls->vm)->GetEnv(j_calls->vm, (void**)&env, JNI_VERSION_1_8) == JNI_OK);\n"
 532
 533                 for arg_info in fn_line.args_ty:
 534                     if arg_info.ret_conv is not None:
 535                         out_c = out_c + "\t" + arg_info.ret_conv[0].replace('\n', '\n\t')
 536                         out_c = out_c + arg_info.arg_name
 537                         out_c = out_c + arg_info.ret_conv[1].replace('\n', '\n\t') + "\n"
 538
 539                 out_c = out_c + "\tjobject obj = (*env)->NewLocalRef(env, j_calls->o);\n\tCHECK(obj != NULL);\n"
 540                 if fn_line.ret_ty_info.c_ty.endswith("Array"):
 541                     out_c = out_c + "\t" + fn_line.ret_ty_info.c_ty + " arg = (*env)->CallObjectMethod(env, obj, j_calls->" + fn_line.fn_name + "_meth"
 542                 elif not fn_line.ret_ty_info.passed_as_ptr:
 543                     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"
 544                 else:
 545                     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"
 546
 547                 for idx, arg_info in enumerate(fn_line.args_ty):
 548                     if arg_info.ret_conv is not None:
 549                         out_c = out_c + ", " + arg_info.ret_conv_name
 550                     else:
 551                         out_c = out_c + ", " + arg_info.arg_name
 552                 out_c = out_c + ");\n"
 553                 if fn_line.ret_ty_info.arg_conv is not None:
 554                     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"
 555
 556                 out_c = out_c + "}\n"
 557
 558         # Write out a clone function whether we need one or not, as we use them in moving to rust
 559         out_c = out_c + "static void* " + struct_name + "_JCalls_clone(const void* this_arg) {\n"
 560         out_c = out_c + "\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n"
 561         out_c = out_c + "\tatomic_fetch_add_explicit(&j_calls->refcnt, 1, memory_order_release);\n"
 562         for var in field_var_conversions:
 563             if not isinstance(var, ConvInfo):
 564                 out_c = out_c + "\tatomic_fetch_add_explicit(&j_calls->" + var[1] + "->refcnt, 1, memory_order_release);\n"
 565         out_c = out_c + "\treturn (void*) this_arg;\n"
 566         out_c = out_c + "}\n"
 567
 568         out_c = out_c + "static inline " + struct_name + " " + struct_name + "_init (" + self.c_fn_args_pfx + ", jobject o"
 569         for var in field_var_conversions:
 570             if isinstance(var, ConvInfo):
 571                 out_c = out_c + ", " + var.c_ty + " " + var.arg_name
 572             else:
 573                 out_c = out_c + ", jobject " + var[1]
 574         out_c = out_c + ") {\n"
 575
 576         out_c = out_c + "\tjclass c = (*env)->GetObjectClass(env, o);\n"
 577         out_c = out_c + "\tCHECK(c != NULL);\n"
 578         out_c = out_c + "\t" + struct_name + "_JCalls *calls = MALLOC(sizeof(" + struct_name + "_JCalls), \"" + struct_name + "_JCalls\");\n"
 579         out_c = out_c + "\tatomic_init(&calls->refcnt, 1);\n"
 580         out_c = out_c + "\tDO_ASSERT((*env)->GetJavaVM(env, &calls->vm) == 0);\n"
 581         out_c = out_c + "\tcalls->o = (*env)->NewWeakGlobalRef(env, o);\n"
 582
 583         for (fn_name, java_meth_descr) in java_meths:
 584             if fn_name != "free" and fn_name != "clone":
 585                 out_c = out_c + "\tcalls->" + fn_name + "_meth = (*env)->GetMethodID(env, c, \"" + fn_name + "\", \"" + java_meth_descr + "\");\n"
 586                 out_c = out_c + "\tCHECK(calls->" + fn_name + "_meth != NULL);\n"
 587
 588         for var in field_var_conversions:
 589             if isinstance(var, ConvInfo) and var.arg_conv is not None:
 590                 out_c = out_c + "\n\t" + var.arg_conv.replace("\n", "\n\t") +"\n"
 591         out_c = out_c + "\n\t" + struct_name + " ret = {\n"
 592         out_c = out_c + "\t\t.this_arg = (void*) calls,\n"
 593         for fn_line in field_function_lines:
 594             if fn_line.fn_name != "free" and fn_line.fn_name != "clone":
 595                 out_c = out_c + "\t\t." + fn_line.fn_name + " = " + fn_line.fn_name + "_jcall,\n"
 596             elif fn_line.fn_name == "free":
 597                 out_c = out_c + "\t\t.free = " + struct_name + "_JCalls_free,\n"
 598             else:
 599                 out_c = out_c + "\t\t.clone = " + struct_name + "_JCalls_clone,\n"
 600         for var in field_var_conversions:
 601             if isinstance(var, ConvInfo):
 602                 if var.arg_conv_name is not None:
 603                     out_c = out_c + "\t\t." + var.arg_name + " = " + var.arg_conv_name + ",\n"
 604                     out_c = out_c + "\t\t.set_" + var.arg_name + " = NULL,\n"
 605                 else:
 606                     out_c = out_c + "\t\t." + var.var_name + " = " + var.var_name + ",\n"
 607                     out_c = out_c + "\t\t.set_" + var.var_name + " = NULL,\n"
 608             else:
 609                 out_c = out_c + "\t\t." + var[1] + " = " + var[0] + "_init(env, clz, " + var[1] + "),\n"
 610         out_c = out_c + "\t};\n"
 611         for var in field_var_conversions:
 612             if not isinstance(var, ConvInfo):
 613                 out_c = out_c + "\tcalls->" + var[1] + " = ret." + var[1] + ".this_arg;\n"
 614         out_c = out_c + "\treturn ret;\n"
 615         out_c = out_c + "}\n"
 616
 617         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"
 618         for var in field_var_conversions:
 619             if isinstance(var, ConvInfo):
 620                 out_c = out_c + ", " + var.c_ty + " " + var.arg_name
 621             else:
 622                 out_c = out_c + ", jobject " + var[1]
 623         out_c = out_c + ") {\n"
 624         out_c = out_c + "\t" + struct_name + " *res_ptr = MALLOC(sizeof(" + struct_name + "), \"" + struct_name + "\");\n"
 625         out_c = out_c + "\t*res_ptr = " + struct_name + "_init(env, clz, o"
 626         for var in field_var_conversions:
 627             if isinstance(var, ConvInfo):
 628                 out_c = out_c + ", " + var.arg_name
 629             else:
 630                 out_c = out_c + ", " + var[1]
 631         out_c = out_c + ");\n"
 632         out_c = out_c + "\treturn (long)res_ptr;\n"
 633         out_c = out_c + "}\n"
 634
 635         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"
 636         out_c = out_c + "\tjobject ret = (*env)->NewLocalRef(env, ((" + struct_name + "_JCalls*)val)->o);\n"
 637         out_c = out_c + "\tCHECK(ret != NULL);\n"
 638         out_c = out_c + "\treturn ret;\n"
 639         out_c = out_c + "}\n"
 640
 641
 642         return (out_typescript_bindings, out_typescript_human, out_c)
 643
 644     def map_complex_enum(self, struct_name, variant_list, camel_to_snake):
 645         java_hu_type = struct_name.replace("LDK", "")
 646
 647         out_java_enum = ""
 648         out_java = ""
 649         out_c = ""
 650
 651         out_java_enum += (self.hu_struct_file_prefix)
 652         out_java_enum += ("export default class " + java_hu_type + " extends CommonBase {\n")
 653         out_java_enum += ("\tprotected constructor(_dummy: object, ptr: number) { super(ptr); }\n")
 654         out_java_enum += ("\tprotected finalize() {\n")
 655         out_java_enum += ("\t\tsuper.finalize();\n")
 656         out_java_enum += ("\t\tif (this.ptr != 0) { bindings." + java_hu_type + "_free(this.ptr); }\n")
 657         out_java_enum += ("\t}\n")
 658         out_java_enum += f"\tstatic constr_from_ptr(ptr: number): {java_hu_type} {{\n"
 659         out_java_enum += (f"\t\tconst raw_val: bindings.{struct_name} = bindings." + struct_name + "_ref_from_ptr(ptr);\n")
 660         java_hu_subclasses = ""
 661
 662         out_java +=  ("\tpublic static class " + struct_name + " {\n")
 663         out_java +=  ("\t\tprivate " + struct_name + "() {}\n")
 664         for var in variant_list:
 665             out_java +=  ("\t\texport class " + var.var_name + " extends " + struct_name + " {\n")
 666             java_hu_subclasses = java_hu_subclasses + "export class " + var.var_name + " extends " + java_hu_type + " {\n"
 667             out_java_enum += ("\t\tif (raw_val instanceof bindings." + struct_name + "." + var.var_name + ") {\n")
 668             out_java_enum += ("\t\t\treturn new " + var.var_name + "(this.ptr, raw_val);\n")
 669             init_meth_params = ""
 670             init_meth_body = ""
 671             hu_conv_body = ""
 672             for idx, field_ty in enumerate(var.fields):
 673                 out_java += ("\t\t\tpublic " + field_ty.java_ty + " " + field_ty.arg_name + ";\n")
 674                 java_hu_subclasses = java_hu_subclasses + "\tpublic " + field_ty.arg_name + f": {field_ty.java_hu_ty};\n"
 675                 if field_ty.to_hu_conv is not None:
 676                     hu_conv_body = hu_conv_body + "\t\tconst " + field_ty.arg_name + f": {field_ty.java_ty} = obj." + field_ty.arg_name + ";\n"
 677                     hu_conv_body = hu_conv_body + "\t\t" + field_ty.to_hu_conv.replace("\n", "\n\t\t\t") + "\n"
 678                     hu_conv_body = hu_conv_body + "\t\tthis." + field_ty.arg_name + " = " + field_ty.to_hu_conv_name + ";\n"
 679                 else:
 680                     hu_conv_body = hu_conv_body + "\t\tthis." + field_ty.arg_name + " = obj." + field_ty.arg_name + ";\n"
 681                 if idx > 0:
 682                     init_meth_params = init_meth_params + ", "
 683                 init_meth_params = init_meth_params + field_ty.java_ty + " " + field_ty.arg_name
 684                 init_meth_body = init_meth_body + "this." + field_ty.arg_name + " = " + field_ty.arg_name + "; "
 685             out_java +=  ("\t\t\t" + var.var_name + "(" + init_meth_params + ") { ")
 686             out_java +=  (init_meth_body)
 687             out_java +=  ("}\n")
 688             out_java += ("\t\t}\n")
 689             out_java_enum += ("\t\t}\n")
 690             java_hu_subclasses = java_hu_subclasses + "\tprivate constructor(ptr: number, obj: bindings." + struct_name + "." + var.var_name + ") {\n\t\tsuper(null, ptr);\n"
 691             java_hu_subclasses = java_hu_subclasses + hu_conv_body
 692             java_hu_subclasses = java_hu_subclasses + "\t}\n}\n"
 693         out_java += ("\t\tstatic native void init();\n")
 694         out_java += ("\t}\n")
 695         out_java_enum += ("\t\tthrow new Error('oops, this should be unreachable'); // Unreachable without extending the (internal) bindings interface\n\t}\n\n")
 696         out_java += ("\tstatic { " + struct_name + ".init(); }\n")
 697         out_java += ("\tpublic static native " + struct_name + " " + struct_name + "_ref_from_ptr(long ptr);\n");
 698
 699         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")
 700         out_c += ("\t" + struct_name + " *obj = (" + struct_name + "*)ptr;\n")
 701         out_c += ("\tswitch(obj->tag) {\n")
 702         for var in variant_list:
 703             out_c += ("\t\tcase " + struct_name + "_" + var.var_name + ": {\n")
 704             c_params = []
 705             for idx, field_map in enumerate(var.fields):
 706                 if field_map.ret_conv is not None:
 707                     out_c += ("\t\t\t" + field_map.ret_conv[0].replace("\n", "\n\t\t\t"))
 708                     out_c += ("obj->" + camel_to_snake(var.var_name) + "." + field_map.arg_name)
 709                     out_c += (field_map.ret_conv[1].replace("\n", "\n\t\t\t") + "\n")
 710                     c_params.append(field_map.ret_conv_name)
 711                 else:
 712                     c_params.append("obj->" + camel_to_snake(var.var_name) + "." + field_map.arg_name)
 713             out_c += ("\t\t\treturn " + self.c_constr_native_complex_enum(struct_name, var.var_name, c_params) + ";\n")
 714             out_c += ("\t\t}\n")
 715         out_c += ("\t\tdefault: abort();\n")
 716         out_c += ("\t}\n}\n")
 717         out_java_enum += ("}\n")
 718         out_java_enum += (java_hu_subclasses)
 719         return (out_java, out_java_enum, out_c)