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

   1 from bindingstypes import ConvInfo
   2 from enum import Enum
   3
   4 def first_to_lower(string: str) -> str:
   5     first = string[0]
   6     return first.lower() + string[1:]
   7
   8
   9 class Target(Enum):
  10     NODEJS = 1,
  11     BROWSER = 2
  12
  13 class Consts:
  14     def __init__(self, DEBUG: bool, target: Target, **kwargs):
  15
  16         self.c_type_map = dict(
  17             uint8_t = ['number', 'Uint8Array'],
  18             uint16_t = ['number', 'Uint16Array'],
  19             uint32_t = ['number', 'Uint32Array'],
  20             uint64_t = ['number'],
  21         )
  22
  23         self.to_hu_conv_templates = dict(
  24             ptr = 'const {var_name}_hu_conv: {human_type} = new {human_type}(null, {var_name});',
  25             default = 'const {var_name}_hu_conv: {human_type} = new {human_type}(null, {var_name});',
  26         )
  27
  28         self.bindings_header = self.wasm_import_header(target) + """
  29 export class VecOrSliceDef {
  30     public dataptr: number;
  31     public datalen: number;
  32     public stride: number;
  33     public constructor(dataptr: number, datalen: number, stride: number) {
  34         this.dataptr = dataptr;
  35         this.datalen = datalen;
  36         this.stride = stride;
  37     }
  38 }
  39
  40 /*
  41 TODO: load WASM file
  42 static {
  43     System.loadLibrary(\"lightningjni\");
  44     init(java.lang.Enum.class, VecOrSliceDef.class);
  45     init_class_cache();
  46 }
  47
  48 static native void init(java.lang.Class c, java.lang.Class slicedef);
  49 static native void init_class_cache();
  50
  51 public static native boolean deref_bool(long ptr);
  52 public static native long deref_long(long ptr);
  53 public static native void free_heap_ptr(long ptr);
  54 public static native byte[] read_bytes(long ptr, long len);
  55 public static native byte[] get_u8_slice_bytes(long slice_ptr);
  56 public static native long bytes_to_u8_vec(byte[] bytes);
  57 public static native long new_txpointer_copy_data(byte[] txdata);
  58 public static native void txpointer_free(long ptr);
  59 public static native byte[] txpointer_get_buffer(long ptr);
  60 public static native long vec_slice_len(long vec);
  61 public static native long new_empty_slice_vec();
  62 */
  63
  64 """
  65
  66         self.common_base = """
  67             export default class CommonBase {
  68                 ptr: number;
  69                 ptrs_to: object[] = []; // new LinkedList(); TODO: build linked list implementation
  70                 protected constructor(ptr: number) { this.ptr = ptr; }
  71                 public _test_only_get_ptr(): number { return this.ptr; }
  72                 protected finalize() {
  73                     // TODO: finalize myself
  74                 }
  75             }
  76 """
  77
  78         self.c_file_pfx = """#include <rust_types.h>
  79 #include <stdatomic.h>
  80 #include <lightning.h>
  81
  82 // These should be provided...somehow...
  83 void *memset(void *s, int c, size_t n);
  84 void *memcpy(void *dest, const void *src, size_t n);
  85 int memcmp(const void *s1, const void *s2, size_t n);
  86
  87 void __attribute__((noreturn)) abort(void);
  88 void assert(scalar expression);
  89 """
  90
  91         if not DEBUG:
  92             self.c_file_pfx = self.c_file_pfx + """
  93 void *malloc(size_t size);
  94 void free(void *ptr);
  95
  96 #define MALLOC(a, _) malloc(a)
  97 #define FREE(p) if ((long)(p) > 1024) { free(p); }
  98 #define DO_ASSERT(a) (void)(a)
  99 #define CHECK(a)
 100 """
 101         else:
 102             self.c_file_pfx = self.c_file_pfx + """
 103 // Always run a, then assert it is true:
 104 #define DO_ASSERT(a) do { bool _assert_val = (a); assert(_assert_val); } while(0)
 105 // Assert a is true or do nothing
 106 #define CHECK(a) DO_ASSERT(a)
 107
 108 // Running a leak check across all the allocations and frees of the JDK is a mess,
 109 // so instead we implement our own naive leak checker here, relying on the -wrap
 110 // linker option to wrap malloc/calloc/realloc/free, tracking everyhing allocated
 111 // and free'd in Rust or C across the generated bindings shared library.
 112
 113 #define BT_MAX 128
 114 typedef struct allocation {
 115         struct allocation* next;
 116         void* ptr;
 117         const char* struct_name;
 118 } allocation;
 119 static allocation* allocation_ll = NULL;
 120
 121 void* __real_malloc(size_t len);
 122 void* __real_calloc(size_t nmemb, size_t len);
 123 static void new_allocation(void* res, const char* struct_name) {
 124         allocation* new_alloc = __real_malloc(sizeof(allocation));
 125         new_alloc->ptr = res;
 126         new_alloc->struct_name = struct_name;
 127         new_alloc->next = allocation_ll;
 128         allocation_ll = new_alloc;
 129 }
 130 static void* MALLOC(size_t len, const char* struct_name) {
 131         void* res = __real_malloc(len);
 132         new_allocation(res, struct_name);
 133         return res;
 134 }
 135 void __real_free(void* ptr);
 136 static void alloc_freed(void* ptr) {
 137         allocation* p = NULL;
 138         allocation* it = allocation_ll;
 139         while (it->ptr != ptr) {
 140                 p = it; it = it->next;
 141                 if (it == NULL) {
 142                         //XXX: fprintf(stderr, "Tried to free unknown pointer %p\\n", ptr);
 143                         return; // addrsan should catch malloc-unknown and print more info than we have
 144                 }
 145         }
 146         if (p) { p->next = it->next; } else { allocation_ll = it->next; }
 147         DO_ASSERT(it->ptr == ptr);
 148         __real_free(it);
 149 }
 150 static void FREE(void* ptr) {
 151         if ((long)ptr < 1024) return; // Rust loves to create pointers to the NULL page for dummys
 152         alloc_freed(ptr);
 153         __real_free(ptr);
 154 }
 155
 156 void* __wrap_malloc(size_t len) {
 157         void* res = __real_malloc(len);
 158         new_allocation(res, "malloc call");
 159         return res;
 160 }
 161 void* __wrap_calloc(size_t nmemb, size_t len) {
 162         void* res = __real_calloc(nmemb, len);
 163         new_allocation(res, "calloc call");
 164         return res;
 165 }
 166 void __wrap_free(void* ptr) {
 167         if (ptr == NULL) return;
 168         alloc_freed(ptr);
 169         __real_free(ptr);
 170 }
 171
 172 void* __real_realloc(void* ptr, size_t newlen);
 173 void* __wrap_realloc(void* ptr, size_t len) {
 174         if (ptr != NULL) alloc_freed(ptr);
 175         void* res = __real_realloc(ptr, len);
 176         new_allocation(res, "realloc call");
 177         return res;
 178 }
 179 void __wrap_reallocarray(void* ptr, size_t new_sz) {
 180         // Rust doesn't seem to use reallocarray currently
 181         DO_ASSERT(false);
 182 }
 183
 184 void __attribute__((destructor)) check_leaks() {
 185         for (allocation* a = allocation_ll; a != NULL; a = a->next) {
 186                 //XXX: fprintf(stderr, "%s %p remains\\n", a->struct_name, a->ptr);
 187         }
 188         DO_ASSERT(allocation_ll == NULL);
 189 }
 190 """
 191         self.c_file_pfx = self.c_file_pfx + """
 192 // We assume that CVec_u8Z and u8slice are the same size and layout (and thus pointers to the two can be mixed)
 193 _Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKu8slice), "Vec<u8> and [u8] need to have been mapped identically");
 194 _Static_assert(offsetof(LDKCVec_u8Z, data) == offsetof(LDKu8slice, data), "Vec<u8> and [u8] need to have been mapped identically");
 195 _Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKu8slice, datalen), "Vec<u8> and [u8] need to have been mapped identically");
 196
 197 _Static_assert(sizeof(void*) == 4, "Pointers mut be 32 bits");
 198
 199 typedef struct int64_tArray {uint32_t len;int64_t *ptr;} int64_tArray;
 200 typedef struct uint32_tArray {uint32_t len;int32_t *ptr;} uint32_tArray;
 201 typedef struct int8_tArray {uint32_t len;int8_t *ptr;} int8_tArray;
 202 typedef struct jstring {} jstring;
 203
 204 jstring conv_owned_string(const char* _src) { jstring a; return a; }
 205
 206 typedef bool jboolean;
 207
 208 """
 209
 210         self.hu_struct_file_prefix = f"""
 211 import CommonBase from './CommonBase';
 212 import * as bindings from '../bindings' // TODO: figure out location
 213
 214 """
 215         self.c_fn_ty_pfx = ""
 216         self.c_fn_name_pfx = ""
 217         self.c_fn_args_pfx = "void* ctx_TODO"
 218         self.file_ext = ".ts"
 219         self.ptr_c_ty = "uint32_t"
 220         self.ptr_native_ty = "number" # "uint32_t"
 221         self.result_c_ty = "uint32_t"
 222         self.owned_str_to_c_call = ("conv_owned_string(", ")")
 223         self.ptr_arr = "uint32_tArray"
 224         self.get_native_arr_len_call = ("", ".len")
 225         self.get_native_arr_ptr_call = ("", ".ptr")
 226
 227     def release_native_arr_ptr_call(self, arr_var, arr_ptr_var):
 228         return None
 229     def create_native_arr_call(self, arr_len, ty_info):
 230         if ty_info.c_ty == "int8_tArray":
 231             return "{ .len = " + arr_len + ", .ptr = MALLOC(" + arr_len + ", \"Native " + ty_info.c_ty + " Bytes\") }"
 232         elif ty_info.c_ty == "int64_tArray":
 233             return "{ .len = " + arr_len + ", .ptr = MALLOC(" + arr_len + " * sizeof(int64_t), \"Native " + ty_info.c_ty + " Bytes\") }"
 234         elif ty_info.c_ty == "uint32_tArray":
 235             return "{ .len = " + arr_len + ", .ptr = MALLOC(" + arr_len + " * sizeof(int32_t), \"Native " + ty_info.c_ty + " Bytes\") }"
 236         else:
 237             print("Need to create arr!", ty_info.c_ty)
 238             return ty_info.c_ty
 239     def set_native_arr_contents(self, arr_name, arr_len, ty_info):
 240         if ty_info.c_ty == "int8_tArray":
 241             return ("memcpy(" + arr_name + ".ptr, ", ", " + arr_len + ")")
 242         else:
 243             assert False
 244     def get_native_arr_contents(self, arr_name, dest_name, arr_len, ty_info, copy):
 245         if ty_info.c_ty == "int8_tArray":
 246             if copy:
 247                 return "memcpy(" + dest_name + ", " + arr_name + ".ptr, " + arr_len + ")"
 248             else:
 249                 return arr_name + ".ptr"
 250         else:
 251             return "(" + ty_info.subty.c_ty + "*) " + arr_name + ".ptr"
 252     def get_native_arr_elem(self, arr_name, idxc, ty_info):
 253         assert False # Only called if above is None
 254     def cleanup_native_arr_ref_contents(self, arr_name, dest_name, arr_len, ty_info):
 255         if ty_info.c_ty == "int8_tArray":
 256             return None
 257         else:
 258             return None
 259
 260
 261     def wasm_import_header(self, target):
 262         if target == Target.NODEJS:
 263             return """
 264 const path = require('path').join(__dirname, 'bindings.wasm');
 265 const bytes = require('fs').readFileSync(path);
 266 let imports = {};
 267 // add all exports to dictionary and move down?
 268 // use `module.exports`?
 269 // imports['./bindings.js'] = require('./bindings.js');
 270
 271 const wasmModule = new WebAssembly.Module(bytes);
 272 const wasmInstance = new WebAssembly.Instance(wasmModule, imports);
 273 // module.exports = wasmInstance.exports;
 274 const wasm = wasmInstance.exports;
 275 """
 276         return ''
 277
 278     def init_str(self, c_array_class_caches):
 279         return ""
 280
 281     def native_c_unitary_enum_map(self, struct_name, variants):
 282         out_c = "static inline " + struct_name + " " + struct_name + "_from_js(int32_t ord) {\n"
 283         out_c = out_c + "\tswitch (ord) {\n"
 284         ord_v = 0
 285
 286         out_typescript_enum_fields = ""
 287
 288         for var in variants:
 289             out_c = out_c + "\t\tcase %d: return %s;\n" % (ord_v, var)
 290             ord_v = ord_v + 1
 291             out_typescript_enum_fields += f"{var},\n\t\t\t\t"
 292         out_c = out_c + "\t}\n"
 293         out_c = out_c + "\tabort();\n"
 294         out_c = out_c + "}\n"
 295
 296         out_c = out_c + "static inline int32_t " + struct_name + "_to_js(" + struct_name + " val) {\n"
 297         out_c = out_c + "\tswitch (val) {\n"
 298         ord_v = 0
 299         for var in variants:
 300             out_c = out_c + "\t\tcase " + var + ": return %d;\n" % ord_v
 301             ord_v = ord_v + 1
 302         out_c = out_c + "\t\tdefault: abort();\n"
 303         out_c = out_c + "\t}\n"
 304         out_c = out_c + "}\n"
 305
 306         out_typescript_enum = f"""
 307             export enum {struct_name} {{
 308                 {out_typescript_enum_fields}
 309             }}
 310 """
 311
 312         return (out_c, out_typescript_enum, "")
 313
 314     def c_unitary_enum_to_native_call(self, ty_info):
 315         return (ty_info.rust_obj + "_to_js(", ")")
 316     def native_unitary_enum_to_c_call(self, ty_info):
 317         return (ty_info.rust_obj + "_from_js(", ")")
 318
 319     def c_complex_enum_pass_ty(self, struct_name):
 320         return "uint32_t"
 321
 322     def c_constr_native_complex_enum(self, struct_name, variant, c_params):
 323         ret = "0 /* " + struct_name + " - " + variant + " */"
 324         for param in c_params:
 325             ret = ret + "; (void) " + param
 326         return ret
 327
 328     def native_c_map_trait(self, struct_name, field_var_conversions, field_function_lines):
 329         out_typescript_bindings = "\n\n\n// OUT_TYPESCRIPT_BINDINGS :: MAP_TRAIT :: START\n\n"
 330
 331         constructor_arguments = ""
 332         super_instantiator = ""
 333         pointer_to_adder = ""
 334         impl_constructor_arguments = ""
 335         for var in field_var_conversions:
 336             if isinstance(var, ConvInfo):
 337                 constructor_arguments += f", {first_to_lower(var.arg_name)}?: {var.java_hu_ty}"
 338                 impl_constructor_arguments += f", {var.arg_name}: {var.java_hu_ty}"
 339                 if var.from_hu_conv is not None:
 340                     super_instantiator += ", " + var.from_hu_conv[0]
 341                     if var.from_hu_conv[1] != "":
 342                         pointer_to_adder += var.from_hu_conv[1] + ";\n"
 343                 else:
 344                     super_instantiator += ", " + first_to_lower(var.arg_name)
 345             else:
 346                 constructor_arguments += f", {first_to_lower(var[1])}?: bindings.{var[0]}"
 347                 super_instantiator += ", " + first_to_lower(var[1])
 348                 pointer_to_adder += "this.ptrs_to.push(" + first_to_lower(var[1]) + ");\n"
 349                 impl_constructor_arguments += f", {first_to_lower(var[1])}_impl: {var[0].replace('LDK', '')}.{var[0].replace('LDK', '')}Interface"
 350
 351         # BUILD INTERFACE METHODS
 352         out_java_interface = ""
 353         out_interface_implementation_overrides = ""
 354         java_methods = []
 355         for fn_line in field_function_lines:
 356             java_method_descriptor = ""
 357             if fn_line.fn_name != "free" and fn_line.fn_name != "clone":
 358                 out_java_interface += fn_line.fn_name + "("
 359                 out_interface_implementation_overrides += f"{fn_line.fn_name} ("
 360
 361                 for idx, arg_conv_info in enumerate(fn_line.args_ty):
 362                     if idx >= 1:
 363                         out_java_interface += ", "
 364                         out_interface_implementation_overrides += ", "
 365                     out_java_interface += f"{arg_conv_info.arg_name}: {arg_conv_info.java_hu_ty}"
 366                     out_interface_implementation_overrides += f"{arg_conv_info.arg_name}: {arg_conv_info.java_ty}"
 367                     java_method_descriptor += arg_conv_info.java_fn_ty_arg
 368                 out_java_interface += f"): {fn_line.ret_ty_info.java_hu_ty};\n\t\t\t\t"
 369                 java_method_descriptor += ")" + fn_line.ret_ty_info.java_fn_ty_arg
 370                 java_methods.append((fn_line.fn_name, java_method_descriptor))
 371
 372                 out_interface_implementation_overrides += f"): {fn_line.ret_ty_info.java_ty} {{\n"
 373
 374                 interface_method_override_inset = "\t\t\t\t\t\t"
 375                 interface_implementation_inset = "\t\t\t\t\t\t\t"
 376                 for arg_info in fn_line.args_ty:
 377                     if arg_info.to_hu_conv is not None:
 378                         out_interface_implementation_overrides += interface_implementation_inset + arg_info.to_hu_conv.replace("\n", "\n\t\t\t\t") + "\n"
 379
 380                 if fn_line.ret_ty_info.java_ty != "void":
 381                     out_interface_implementation_overrides += interface_implementation_inset + fn_line.ret_ty_info.java_hu_ty + " ret = arg." + fn_line.fn_name + "("
 382                 else:
 383                     out_interface_implementation_overrides += f"{interface_implementation_inset}arg." + fn_line.fn_name + "("
 384
 385                 for idx, arg_info in enumerate(fn_line.args_ty):
 386                     if idx != 0:
 387                         out_interface_implementation_overrides += ", "
 388                     if arg_info.to_hu_conv_name is not None:
 389                         out_interface_implementation_overrides += arg_info.to_hu_conv_name
 390                     else:
 391                         out_interface_implementation_overrides += arg_info.arg_name
 392
 393                 out_interface_implementation_overrides += ");\n"
 394                 if fn_line.ret_ty_info.java_ty != "void":
 395                     if fn_line.ret_ty_info.from_hu_conv is not None:
 396                         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"
 397                         if fn_line.ret_ty_info.from_hu_conv[1] != "":
 398                             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"
 399                         #if fn_line.ret_ty_info.rust_obj in result_types:
 400                         # XXX: We need to handle this in conversion logic so that its cross-language!
 401                         # Avoid double-free by breaking the result - we should learn to clone these and then we can be safe instead
 402                         #    out_interface_implementation_overrides = out_interface_implementation_overrides + "\t\t\t\tret.ptr = 0;\n"
 403                         out_interface_implementation_overrides = out_interface_implementation_overrides + "\t\t\t\treturn result;\n"
 404                     else:
 405                         out_interface_implementation_overrides = out_interface_implementation_overrides + "\t\t\t\treturn ret;\n"
 406                 out_interface_implementation_overrides += f"{interface_method_override_inset}}},\n\n{interface_method_override_inset}"
 407
 408         trait_constructor_arguments = ""
 409         for var in field_var_conversions:
 410             if isinstance(var, ConvInfo):
 411                 trait_constructor_arguments += ", " + var.arg_name
 412             else:
 413                 trait_constructor_arguments += ", " + var[1] + ".new_impl(" + var[1] + "_impl).bindings_instance"
 414
 415         out_typescript_human = f"""
 416             {self.hu_struct_file_prefix}
 417
 418             export class {struct_name.replace("LDK","")} extends CommonBase {{
 419
 420                 bindings_instance?: bindings.{struct_name};
 421
 422                 constructor(ptr?: number, arg?: bindings.{struct_name}{constructor_arguments}) {{
 423                     if (Number.isFinite(ptr)) {{
 424                                         super(ptr);
 425                                         this.bindings_instance = null;
 426                                     }} else {{
 427                                         // TODO: private constructor instantiation
 428                                         super(bindings.{struct_name}_new(arg{super_instantiator}));
 429                                         this.ptrs_to.push(arg);
 430                                         {pointer_to_adder}
 431                                     }}
 432                 }}
 433
 434                 protected finalize() {{
 435                     if (this.ptr != 0) {{
 436                         bindings.{struct_name.replace("LDK","")}_free(this.ptr);
 437                     }}
 438                     super.finalize();
 439                 }}
 440
 441                 static new_impl(arg: {struct_name.replace("LDK", "")}Interface{impl_constructor_arguments}): {struct_name.replace("LDK", "")} {{
 442                     const impl_holder: {struct_name}Holder = new {struct_name}Holder();
 443                     let structImplementation = <bindings.{struct_name}>{{
 444                         // todo: in-line interface filling
 445                         {out_interface_implementation_overrides}
 446                     }};
 447                     impl_holder.held = new {struct_name.replace("LDK", "")} (null, structImplementation{trait_constructor_arguments});
 448                 }}
 449             }}
 450
 451             export interface {struct_name.replace("LDK", "")}Interface {{
 452                 {out_java_interface}
 453             }}
 454
 455             class {struct_name}Holder {{
 456                 held: {struct_name.replace("LDK", "")};
 457             }}
 458 """
 459
 460         out_typescript_bindings += "\t\texport interface " + struct_name + " {\n"
 461         java_meths = []
 462         for fn_line in field_function_lines:
 463             if fn_line.fn_name != "free" and fn_line.fn_name != "clone":
 464                 out_typescript_bindings += f"\t\t\t{fn_line.fn_name} ("
 465
 466                 for idx, arg_conv_info in enumerate(fn_line.args_ty):
 467                     if idx >= 1:
 468                         out_typescript_bindings = out_typescript_bindings + ", "
 469                     out_typescript_bindings += f"{arg_conv_info.arg_name}: {arg_conv_info.java_ty}"
 470
 471                 out_typescript_bindings += f"): {fn_line.ret_ty_info.java_ty};\n"
 472
 473         out_typescript_bindings = out_typescript_bindings + "\t\t}\n\n"
 474
 475         out_typescript_bindings += f"\t\texport function {struct_name}_new(impl: {struct_name}"
 476         for var in field_var_conversions:
 477             if isinstance(var, ConvInfo):
 478                 out_typescript_bindings += f", {var.arg_name}: {var.java_ty}"
 479             else:
 480                 out_typescript_bindings += f", {var[1]}: {var[0]}"
 481
 482         out_typescript_bindings += f"""): number {{
 483             throw new Error('unimplemented'); // TODO: bind to WASM
 484         }}
 485 """
 486
 487         out_typescript_bindings += '\n// OUT_TYPESCRIPT_BINDINGS :: MAP_TRAIT :: END\n\n\n'
 488
 489         # Now that we've written out our java code (and created java_meths), generate C
 490         out_c = "typedef struct " + struct_name + "_JCalls {\n"
 491         out_c = out_c + "\tatomic_size_t refcnt;\n"
 492         out_c = out_c + "\t// TODO: Object pointer 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 + "\t// TODO: Some kind of method pointer " + 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\t// TODO: do any release required for j_calls->o (refcnt-- in java, but may be redundant)\n"
 511                 out_c = out_c + "\t\tFREE(j_calls);\n"
 512                 out_c = out_c + "\t}\n}\n"
 513
 514         for idx, fn_line in enumerate(field_function_lines):
 515             if fn_line.fn_name != "free" and fn_line.fn_name != "clone":
 516                 assert fn_line.ret_ty_info.ty_info.get_full_rust_ty()[1] == ""
 517                 out_c = out_c + fn_line.ret_ty_info.ty_info.get_full_rust_ty()[0] + " " + fn_line.fn_name + "_jcall("
 518                 if fn_line.self_is_const:
 519                     out_c = out_c + "const void* this_arg"
 520                 else:
 521                     out_c = out_c + "void* this_arg"
 522
 523                 for idx, arg in enumerate(fn_line.args_ty):
 524                     out_c = out_c + ", " + arg.ty_info.get_full_rust_ty()[0] + " " + arg.arg_name + arg.ty_info.get_full_rust_ty()[1]
 525
 526                 out_c = out_c + ") {\n"
 527                 out_c = out_c + "\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n"
 528
 529                 for arg_info in fn_line.args_ty:
 530                     if arg_info.ret_conv is not None:
 531                         out_c = out_c + "\t" + arg_info.ret_conv[0].replace('\n', '\n\t')
 532                         out_c = out_c + arg_info.arg_name
 533                         out_c = out_c + arg_info.ret_conv[1].replace('\n', '\n\t') + "\n"
 534
 535                 out_c = out_c + "\t//TODO: jobject obj = get object we can call against on j_calls->o\n"
 536                 if fn_line.ret_ty_info.c_ty.endswith("Array"):
 537                     out_c = out_c + "\t" + fn_line.ret_ty_info.c_ty + " arg; // TODO: Call " + fn_line.fn_name + " on j_calls with instance obj, returning an object"
 538                 elif fn_line.ret_ty_info.java_ty == "void":
 539                     out_c = out_c + "\treturn; //TODO: Call " + fn_line.fn_name + " on j_calls with instance obj"
 540                 elif not fn_line.ret_ty_info.passed_as_ptr:
 541                     out_c = out_c + "\treturn 0; //TODO: Call " + fn_line.fn_name + " on j_calls with instance obj, returning " + fn_line.ret_ty_info.java_ty
 542                 else:
 543                     out_c = out_c + "\t" + fn_line.ret_ty_info.rust_obj + "* ret; // TODO: Call " + fn_line.fn_name + " on j_calls with instance obj, returning a pointer"
 544
 545                 for idx, arg_info in enumerate(fn_line.args_ty):
 546                     if arg_info.ret_conv is not None:
 547                         out_c = out_c + ", " + arg_info.ret_conv_name
 548                     else:
 549                         out_c = out_c + ", " + arg_info.arg_name
 550                 out_c = out_c + ");\n"
 551                 if fn_line.ret_ty_info.arg_conv is not None:
 552                     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"
 553
 554                 out_c = out_c + "}\n"
 555
 556         # Write out a clone function whether we need one or not, as we use them in moving to rust
 557         out_c = out_c + "static void* " + struct_name + "_JCalls_clone(const void* this_arg) {\n"
 558         out_c = out_c + "\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n"
 559         out_c = out_c + "\tatomic_fetch_add_explicit(&j_calls->refcnt, 1, memory_order_release);\n"
 560         for var in field_var_conversions:
 561             if not isinstance(var, ConvInfo):
 562                 out_c = out_c + "\tatomic_fetch_add_explicit(&j_calls->" + var[1] + "->refcnt, 1, memory_order_release);\n"
 563         out_c = out_c + "\treturn (void*) this_arg;\n"
 564         out_c = out_c + "}\n"
 565
 566         out_c = out_c + "static inline " + struct_name + " " + struct_name + "_init (" + self.c_fn_args_pfx + ", /*TODO: JS Object Reference */void* o"
 567         for var in field_var_conversions:
 568             if isinstance(var, ConvInfo):
 569                 out_c = out_c + ", " + var.c_ty + " " + var.arg_name
 570             else:
 571                 out_c = out_c + ", /*TODO: JS Object Reference */void* " + var[1]
 572         out_c = out_c + ") {\n"
 573
 574         out_c = out_c + "\t" + struct_name + "_JCalls *calls = MALLOC(sizeof(" + struct_name + "_JCalls), \"" + struct_name + "_JCalls\");\n"
 575         out_c = out_c + "\tatomic_init(&calls->refcnt, 1);\n"
 576         out_c = out_c + "\t//TODO: Assign calls->o from o\n"
 577
 578         for (fn_name, java_meth_descr) in java_meths:
 579             if fn_name != "free" and fn_name != "clone":
 580                 out_c = out_c + "\tcalls->" + fn_name + "_meth = (*env)->GetMethodID(env, c, \"" + fn_name + "\", \"" + java_meth_descr + "\");\n"
 581                 out_c = out_c + "\tCHECK(calls->" + fn_name + "_meth != NULL);\n"
 582
 583         for var in field_var_conversions:
 584             if isinstance(var, ConvInfo) and var.arg_conv is not None:
 585                 out_c = out_c + "\n\t" + var.arg_conv.replace("\n", "\n\t") +"\n"
 586         out_c = out_c + "\n\t" + struct_name + " ret = {\n"
 587         out_c = out_c + "\t\t.this_arg = (void*) calls,\n"
 588         for fn_line in field_function_lines:
 589             if fn_line.fn_name != "free" and fn_line.fn_name != "clone":
 590                 out_c = out_c + "\t\t." + fn_line.fn_name + " = " + fn_line.fn_name + "_jcall,\n"
 591             elif fn_line.fn_name == "free":
 592                 out_c = out_c + "\t\t.free = " + struct_name + "_JCalls_free,\n"
 593             else:
 594                 out_c = out_c + "\t\t.clone = " + struct_name + "_JCalls_clone,\n"
 595         for var in field_var_conversions:
 596             if isinstance(var, ConvInfo):
 597                 if var.arg_conv_name is not None:
 598                     out_c = out_c + "\t\t." + var.arg_name + " = " + var.arg_conv_name + ",\n"
 599                     out_c = out_c + "\t\t.set_" + var.arg_name + " = NULL,\n"
 600                 else:
 601                     out_c = out_c + "\t\t." + var.var_name + " = " + var.var_name + ",\n"
 602                     out_c = out_c + "\t\t.set_" + var.var_name + " = NULL,\n"
 603             else:
 604                 out_c = out_c + "\t\t." + var[1] + " = " + var[0] + "_init(NULL, " + var[1] + "),\n"
 605         out_c = out_c + "\t};\n"
 606         for var in field_var_conversions:
 607             if not isinstance(var, ConvInfo):
 608                 out_c = out_c + "\tcalls->" + var[1] + " = ret." + var[1] + ".this_arg;\n"
 609         out_c = out_c + "\treturn ret;\n"
 610         out_c = out_c + "}\n"
 611
 612         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 + ", /*TODO: JS Object Reference */void* o"
 613         for var in field_var_conversions:
 614             if isinstance(var, ConvInfo):
 615                 out_c = out_c + ", " + var.c_ty + " " + var.arg_name
 616             else:
 617                 out_c = out_c + ", /*TODO: JS Object Reference */ void* " + var[1]
 618         out_c = out_c + ") {\n"
 619         out_c = out_c + "\t" + struct_name + " *res_ptr = MALLOC(sizeof(" + struct_name + "), \"" + struct_name + "\");\n"
 620         out_c = out_c + "\t*res_ptr = " + struct_name + "_init(NULL, o"
 621         for var in field_var_conversions:
 622             if isinstance(var, ConvInfo):
 623                 out_c = out_c + ", " + var.arg_name
 624             else:
 625                 out_c = out_c + ", " + var[1]
 626         out_c = out_c + ");\n"
 627         out_c = out_c + "\treturn (long)res_ptr;\n"
 628         out_c = out_c + "}\n"
 629
 630         return (out_typescript_bindings, out_typescript_human, out_c)
 631
 632     def trait_struct_inc_refcnt(self, ty_info):
 633         return ""
 634
 635     def map_complex_enum(self, struct_name, variant_list, camel_to_snake):
 636         java_hu_type = struct_name.replace("LDK", "")
 637
 638         out_java_enum = ""
 639         out_java = ""
 640         out_c = ""
 641
 642         out_java_enum += (self.hu_struct_file_prefix)
 643         out_java_enum += ("export default class " + java_hu_type + " extends CommonBase {\n")
 644         out_java_enum += ("\tprotected constructor(_dummy: object, ptr: number) { super(ptr); }\n")
 645         out_java_enum += ("\tprotected finalize() {\n")
 646         out_java_enum += ("\t\tsuper.finalize();\n")
 647         out_java_enum += ("\t\tif (this.ptr != 0) { bindings." + java_hu_type + "_free(this.ptr); }\n")
 648         out_java_enum += ("\t}\n")
 649         out_java_enum += f"\tstatic constr_from_ptr(ptr: number): {java_hu_type} {{\n"
 650         out_java_enum += (f"\t\tconst raw_val: bindings.{struct_name} = bindings." + struct_name + "_ref_from_ptr(ptr);\n")
 651         java_hu_subclasses = ""
 652
 653         out_java +=  ("\tpublic static class " + struct_name + " {\n")
 654         out_java +=  ("\t\tprivate " + struct_name + "() {}\n")
 655         for var in variant_list:
 656             out_java +=  ("\t\texport class " + var.var_name + " extends " + struct_name + " {\n")
 657             java_hu_subclasses = java_hu_subclasses + "export class " + var.var_name + " extends " + java_hu_type + " {\n"
 658             out_java_enum += ("\t\tif (raw_val instanceof bindings." + struct_name + "." + var.var_name + ") {\n")
 659             out_java_enum += ("\t\t\treturn new " + var.var_name + "(this.ptr, raw_val);\n")
 660             init_meth_params = ""
 661             init_meth_body = ""
 662             hu_conv_body = ""
 663             for idx, field_ty in enumerate(var.fields):
 664                 out_java += ("\t\t\tpublic " + field_ty.java_ty + " " + field_ty.arg_name + ";\n")
 665                 java_hu_subclasses = java_hu_subclasses + "\tpublic " + field_ty.arg_name + f": {field_ty.java_hu_ty};\n"
 666                 if field_ty.to_hu_conv is not None:
 667                     hu_conv_body = hu_conv_body + "\t\tconst " + field_ty.arg_name + f": {field_ty.java_ty} = obj." + field_ty.arg_name + ";\n"
 668                     hu_conv_body = hu_conv_body + "\t\t" + field_ty.to_hu_conv.replace("\n", "\n\t\t\t") + "\n"
 669                     hu_conv_body = hu_conv_body + "\t\tthis." + field_ty.arg_name + " = " + field_ty.to_hu_conv_name + ";\n"
 670                 else:
 671                     hu_conv_body = hu_conv_body + "\t\tthis." + field_ty.arg_name + " = obj." + field_ty.arg_name + ";\n"
 672                 if idx > 0:
 673                     init_meth_params = init_meth_params + ", "
 674                 init_meth_params = init_meth_params + field_ty.java_ty + " " + field_ty.arg_name
 675                 init_meth_body = init_meth_body + "this." + field_ty.arg_name + " = " + field_ty.arg_name + "; "
 676             out_java +=  ("\t\t\t" + var.var_name + "(" + init_meth_params + ") { ")
 677             out_java +=  (init_meth_body)
 678             out_java +=  ("}\n")
 679             out_java += ("\t\t}\n")
 680             out_java_enum += ("\t\t}\n")
 681             java_hu_subclasses = java_hu_subclasses + "\tprivate constructor(ptr: number, obj: bindings." + struct_name + "." + var.var_name + ") {\n\t\tsuper(null, ptr);\n"
 682             java_hu_subclasses = java_hu_subclasses + hu_conv_body
 683             java_hu_subclasses = java_hu_subclasses + "\t}\n}\n"
 684         out_java += ("\t\tstatic native void init();\n")
 685         out_java += ("\t}\n")
 686         out_java_enum += ("\t\tthrow new Error('oops, this should be unreachable'); // Unreachable without extending the (internal) bindings interface\n\t}\n\n")
 687         out_java += ("\tstatic { " + struct_name + ".init(); }\n")
 688         out_java += ("\tpublic static native " + struct_name + " " + struct_name + "_ref_from_ptr(long ptr);\n");
 689
 690         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")
 691         out_c += ("\t" + struct_name + " *obj = (" + struct_name + "*)ptr;\n")
 692         out_c += ("\tswitch(obj->tag) {\n")
 693         for var in variant_list:
 694             out_c += ("\t\tcase " + struct_name + "_" + var.var_name + ": {\n")
 695             c_params = []
 696             for idx, field_map in enumerate(var.fields):
 697                 if field_map.ret_conv is not None:
 698                     out_c += ("\t\t\t" + field_map.ret_conv[0].replace("\n", "\n\t\t\t"))
 699                     out_c += ("obj->" + camel_to_snake(var.var_name) + "." + field_map.arg_name)
 700                     out_c += (field_map.ret_conv[1].replace("\n", "\n\t\t\t") + "\n")
 701                     c_params.append(field_map.ret_conv_name)
 702                 else:
 703                     c_params.append("obj->" + camel_to_snake(var.var_name) + "." + field_map.arg_name)
 704             out_c += ("\t\t\treturn " + self.c_constr_native_complex_enum(struct_name, var.var_name, c_params) + ";\n")
 705             out_c += ("\t\t}\n")
 706         out_c += ("\t\tdefault: abort();\n")
 707         out_c += ("\t}\n}\n")
 708         out_java_enum += ("}\n")
 709         out_java_enum += (java_hu_subclasses)
 710         return (out_java, out_java_enum, out_c)
 711
 712     def map_opaque_struct(self, struct_name):
 713         implementations = ""
 714         method_header = ""
 715         if struct_name.startswith("LDKLocked"):
 716             implementations += "implements AutoCloseable "
 717             method_header = """
 718                 public close() {
 719 """
 720         else:
 721             method_header = """
 722                 protected finalize() {
 723                     super.finalize();
 724 """
 725
 726         out_opaque_struct_human = f"""
 727             {self.hu_struct_file_prefix}
 728
 729             export default class {struct_name.replace("LDK","")} extends CommonBase {implementations}{{
 730                 constructor(_dummy: object, ptr: number) {{
 731                     super(ptr);
 732                 }}
 733
 734                 {method_header}
 735                     if (this.ptr != 0) {{
 736                         bindings.{struct_name.replace("LDK","")}_free(this.ptr);
 737                     }}
 738                 }}
 739 """
 740         return out_opaque_struct_human