_ 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 "js-wasm.h"
  80 #include <stdatomic.h>
  81 #include <lightning.h>
  82
  83 // These should be provided...somehow...
  84 void *memset(void *s, int c, size_t n);
  85 void *memcpy(void *dest, const void *src, size_t n);
  86 int memcmp(const void *s1, const void *s2, size_t n);
  87
  88 void __attribute__((noreturn)) abort(void);
  89 void assert(bool expression);
  90 """
  91
  92         if not DEBUG:
  93             self.c_file_pfx = self.c_file_pfx + """
  94 void *malloc(size_t size);
  95 void free(void *ptr);
  96
  97 #define MALLOC(a, _) malloc(a)
  98 #define FREE(p) if ((long)(p) > 1024) { free(p); }
  99 #define DO_ASSERT(a) (void)(a)
 100 #define CHECK(a)
 101 """
 102         else:
 103             self.c_file_pfx = self.c_file_pfx + """
 104 // Always run a, then assert it is true:
 105 #define DO_ASSERT(a) do { bool _assert_val = (a); assert(_assert_val); } while(0)
 106 // Assert a is true or do nothing
 107 #define CHECK(a) DO_ASSERT(a)
 108
 109 // Running a leak check across all the allocations and frees of the JDK is a mess,
 110 // so instead we implement our own naive leak checker here, relying on the -wrap
 111 // linker option to wrap malloc/calloc/realloc/free, tracking everyhing allocated
 112 // and free'd in Rust or C across the generated bindings shared library.
 113
 114 #define BT_MAX 128
 115 typedef struct allocation {
 116         struct allocation* next;
 117         void* ptr;
 118         const char* struct_name;
 119 } allocation;
 120 static allocation* allocation_ll = NULL;
 121
 122 void* __real_malloc(size_t len);
 123 void* __real_calloc(size_t nmemb, size_t len);
 124 static void new_allocation(void* res, const char* struct_name) {
 125         allocation* new_alloc = __real_malloc(sizeof(allocation));
 126         new_alloc->ptr = res;
 127         new_alloc->struct_name = struct_name;
 128         new_alloc->next = allocation_ll;
 129         allocation_ll = new_alloc;
 130 }
 131 static void* MALLOC(size_t len, const char* struct_name) {
 132         void* res = __real_malloc(len);
 133         new_allocation(res, struct_name);
 134         return res;
 135 }
 136 void __real_free(void* ptr);
 137 static void alloc_freed(void* ptr) {
 138         allocation* p = NULL;
 139         allocation* it = allocation_ll;
 140         while (it->ptr != ptr) {
 141                 p = it; it = it->next;
 142                 if (it == NULL) {
 143                         //XXX: fprintf(stderr, "Tried to free unknown pointer %p\\n", ptr);
 144                         return; // addrsan should catch malloc-unknown and print more info than we have
 145                 }
 146         }
 147         if (p) { p->next = it->next; } else { allocation_ll = it->next; }
 148         DO_ASSERT(it->ptr == ptr);
 149         __real_free(it);
 150 }
 151 static void FREE(void* ptr) {
 152         if ((long)ptr < 1024) return; // Rust loves to create pointers to the NULL page for dummys
 153         alloc_freed(ptr);
 154         __real_free(ptr);
 155 }
 156
 157 void* __wrap_malloc(size_t len) {
 158         void* res = __real_malloc(len);
 159         new_allocation(res, "malloc call");
 160         return res;
 161 }
 162 void* __wrap_calloc(size_t nmemb, size_t len) {
 163         void* res = __real_calloc(nmemb, len);
 164         new_allocation(res, "calloc call");
 165         return res;
 166 }
 167 void __wrap_free(void* ptr) {
 168         if (ptr == NULL) return;
 169         alloc_freed(ptr);
 170         __real_free(ptr);
 171 }
 172
 173 void* __real_realloc(void* ptr, size_t newlen);
 174 void* __wrap_realloc(void* ptr, size_t len) {
 175         if (ptr != NULL) alloc_freed(ptr);
 176         void* res = __real_realloc(ptr, len);
 177         new_allocation(res, "realloc call");
 178         return res;
 179 }
 180 void __wrap_reallocarray(void* ptr, size_t new_sz) {
 181         // Rust doesn't seem to use reallocarray currently
 182         DO_ASSERT(false);
 183 }
 184
 185 void __attribute__((destructor)) check_leaks() {
 186         for (allocation* a = allocation_ll; a != NULL; a = a->next) {
 187                 //XXX: fprintf(stderr, "%s %p remains\\n", a->struct_name, a->ptr);
 188         }
 189         DO_ASSERT(allocation_ll == NULL);
 190 }
 191 """
 192         self.c_file_pfx = self.c_file_pfx + """
 193 // We assume that CVec_u8Z and u8slice are the same size and layout (and thus pointers to the two can be mixed)
 194 _Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKu8slice), "Vec<u8> and [u8] need to have been mapped identically");
 195 _Static_assert(offsetof(LDKCVec_u8Z, data) == offsetof(LDKu8slice, data), "Vec<u8> and [u8] need to have been mapped identically");
 196 _Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKu8slice, datalen), "Vec<u8> and [u8] need to have been mapped identically");
 197
 198 _Static_assert(sizeof(void*) == 4, "Pointers mut be 32 bits");
 199
 200 typedef struct int64_tArray { uint32_t *len; /* len + 1 is data */ } int64_tArray;
 201 typedef struct uint32_tArray { uint32_t *len; /* len + 1 is data */ } uint32_tArray;
 202 typedef struct ptrArray { uint32_t *len; /* len + 1 is data */ } ptrArray;
 203 typedef struct int8_tArray { uint32_t *len; /* len + 1 is data */ } int8_tArray;
 204 typedef struct jstring {} jstring;
 205
 206 jstring conv_owned_string(const char* _src) { jstring a; return a; }
 207
 208 typedef bool jboolean;
 209
 210 """
 211
 212         self.hu_struct_file_prefix = f"""
 213 import CommonBase from './CommonBase';
 214 import * as bindings from '../bindings' // TODO: figure out location
 215
 216 """
 217         self.c_fn_ty_pfx = ""
 218         self.c_fn_name_pfx = ""
 219         self.c_fn_args_pfx = "void* ctx_TODO"
 220         self.file_ext = ".ts"
 221         self.ptr_c_ty = "uint32_t"
 222         self.ptr_native_ty = "number" # "uint32_t"
 223         self.result_c_ty = "uint32_t"
 224         self.owned_str_to_c_call = ("conv_owned_string(", ")")
 225         self.ptr_arr = "ptrArray"
 226         self.get_native_arr_len_call = ("*", ".len")
 227
 228     def release_native_arr_ptr_call(self, ty_info, arr_var, arr_ptr_var):
 229         return None
 230     def create_native_arr_call(self, arr_len, ty_info):
 231         if ty_info.c_ty == "int8_tArray":
 232             return "{ .len = MALLOC(" + arr_len + " + sizeof(uint32_t), \"Native " + ty_info.c_ty + " Bytes\") }"
 233         elif ty_info.c_ty == "int64_tArray":
 234             return "{ .len = MALLOC(" + arr_len + " * sizeof(int64_t) + sizeof(uint32_t), \"Native " + ty_info.c_ty + " Bytes\") }"
 235         elif ty_info.c_ty == "uint32_tArray":
 236             return "{ .len = MALLOC(" + arr_len + " * sizeof(int32_t) + sizeof(uint32_t), \"Native " + ty_info.c_ty + " Bytes\") }"
 237         elif ty_info.c_ty == "ptrArray":
 238             assert ty_info.subty is not None and ty_info.subty.c_ty.endswith("Array")
 239             return "{ .len = MALLOC(" + arr_len + " * sizeof(int32_t) + sizeof(uint32_t), \"Native Object Bytes\") }"
 240         else:
 241             print("Need to create arr!", ty_info.c_ty)
 242             return ty_info.c_ty
 243     def set_native_arr_contents(self, arr_name, arr_len, ty_info):
 244         if ty_info.c_ty == "int8_tArray":
 245             return ("memcpy(" + arr_name + ".len + 1, ", ", " + arr_len + ")")
 246         else:
 247             assert False
 248     def get_native_arr_contents(self, arr_name, dest_name, arr_len, ty_info, copy):
 249         if ty_info.c_ty == "int8_tArray":
 250             if copy:
 251                 return "memcpy(" + dest_name + ", " + arr_name + ".len + 1, " + arr_len + ")"
 252             else:
 253                 return "(int8_t*)(" + arr_name + ".len + 1)"
 254         else:
 255             return "(" + ty_info.subty.c_ty + "*)(" + arr_name + ".len + 1)"
 256     def get_native_arr_elem(self, arr_name, idxc, ty_info):
 257         assert False # Only called if above is None
 258     def get_native_arr_ptr_call(self, ty_info):
 259         if ty_info.subty is not None:
 260             return "(" + ty_info.subty.c_ty + "*)(", ".len + 1)"
 261         return "(" + ty_info.c_ty + "*)(", ".len + 1)"
 262     def get_native_arr_entry_call(self, ty_info, arr_name, idxc, entry_access):
 263         return None
 264     def cleanup_native_arr_ref_contents(self, arr_name, dest_name, arr_len, ty_info):
 265         if ty_info.c_ty == "int8_tArray":
 266             return None
 267         else:
 268             return None
 269
 270
 271     def wasm_import_header(self, target):
 272         if target == Target.NODEJS:
 273             return """
 274 const path = require('path').join(__dirname, 'bindings.wasm');
 275 const bytes = require('fs').readFileSync(path);
 276 let imports = {};
 277 // add all exports to dictionary and move down?
 278 // use `module.exports`?
 279 // imports['./bindings.js'] = require('./bindings.js');
 280
 281 const wasmModule = new WebAssembly.Module(bytes);
 282 const wasmInstance = new WebAssembly.Instance(wasmModule, imports);
 283 // module.exports = wasmInstance.exports;
 284 const wasm = wasmInstance.exports;
 285 """
 286         return ''
 287
 288     def init_str(self):
 289         return ""
 290
 291     def native_c_unitary_enum_map(self, struct_name, variants):
 292         out_c = "static inline " + struct_name + " " + struct_name + "_from_js(int32_t ord) {\n"
 293         out_c = out_c + "\tswitch (ord) {\n"
 294         ord_v = 0
 295
 296         out_typescript_enum_fields = ""
 297
 298         for var in variants:
 299             out_c = out_c + "\t\tcase %d: return %s;\n" % (ord_v, var)
 300             ord_v = ord_v + 1
 301             out_typescript_enum_fields += f"{var},\n\t\t\t\t"
 302         out_c = out_c + "\t}\n"
 303         out_c = out_c + "\tabort();\n"
 304         out_c = out_c + "}\n"
 305
 306         out_c = out_c + "static inline int32_t " + struct_name + "_to_js(" + struct_name + " val) {\n"
 307         out_c = out_c + "\tswitch (val) {\n"
 308         ord_v = 0
 309         for var in variants:
 310             out_c = out_c + "\t\tcase " + var + ": return %d;\n" % ord_v
 311             ord_v = ord_v + 1
 312         out_c = out_c + "\t\tdefault: abort();\n"
 313         out_c = out_c + "\t}\n"
 314         out_c = out_c + "}\n"
 315
 316         out_typescript_enum = f"""
 317             export enum {struct_name} {{
 318                 {out_typescript_enum_fields}
 319             }}
 320 """
 321
 322         return (out_c, out_typescript_enum, "")
 323
 324     def c_unitary_enum_to_native_call(self, ty_info):
 325         return (ty_info.rust_obj + "_to_js(", ")")
 326     def native_unitary_enum_to_c_call(self, ty_info):
 327         return (ty_info.rust_obj + "_from_js(", ")")
 328
 329     def c_complex_enum_pass_ty(self, struct_name):
 330         return "uint32_t"
 331
 332     def c_constr_native_complex_enum(self, struct_name, variant, c_params):
 333         ret = "0 /* " + struct_name + " - " + variant + " */"
 334         for param in c_params:
 335             ret = ret + "; (void) " + param
 336         return ret
 337
 338     def native_c_map_trait(self, struct_name, field_var_conversions, field_function_lines):
 339         out_typescript_bindings = "\n\n\n// OUT_TYPESCRIPT_BINDINGS :: MAP_TRAIT :: START\n\n"
 340
 341         constructor_arguments = ""
 342         super_instantiator = ""
 343         pointer_to_adder = ""
 344         impl_constructor_arguments = ""
 345         for var in field_var_conversions:
 346             if isinstance(var, ConvInfo):
 347                 constructor_arguments += f", {first_to_lower(var.arg_name)}?: {var.java_hu_ty}"
 348                 impl_constructor_arguments += f", {var.arg_name}: {var.java_hu_ty}"
 349                 if var.from_hu_conv is not None:
 350                     super_instantiator += ", " + var.from_hu_conv[0]
 351                     if var.from_hu_conv[1] != "":
 352                         pointer_to_adder += var.from_hu_conv[1] + ";\n"
 353                 else:
 354                     super_instantiator += ", " + first_to_lower(var.arg_name)
 355             else:
 356                 constructor_arguments += f", {first_to_lower(var[1])}?: bindings.{var[0]}"
 357                 super_instantiator += ", " + first_to_lower(var[1])
 358                 pointer_to_adder += "this.ptrs_to.push(" + first_to_lower(var[1]) + ");\n"
 359                 impl_constructor_arguments += f", {first_to_lower(var[1])}_impl: {var[0].replace('LDK', '')}.{var[0].replace('LDK', '')}Interface"
 360
 361         # BUILD INTERFACE METHODS
 362         out_java_interface = ""
 363         out_interface_implementation_overrides = ""
 364         java_methods = []
 365         for fn_line in field_function_lines:
 366             java_method_descriptor = ""
 367             if fn_line.fn_name != "free" and fn_line.fn_name != "clone":
 368                 out_java_interface += fn_line.fn_name + "("
 369                 out_interface_implementation_overrides += f"{fn_line.fn_name} ("
 370
 371                 for idx, arg_conv_info in enumerate(fn_line.args_ty):
 372                     if idx >= 1:
 373                         out_java_interface += ", "
 374                         out_interface_implementation_overrides += ", "
 375                     out_java_interface += f"{arg_conv_info.arg_name}: {arg_conv_info.java_hu_ty}"
 376                     out_interface_implementation_overrides += f"{arg_conv_info.arg_name}: {arg_conv_info.java_ty}"
 377                     java_method_descriptor += arg_conv_info.java_fn_ty_arg
 378                 out_java_interface += f"): {fn_line.ret_ty_info.java_hu_ty};\n\t\t\t\t"
 379                 java_method_descriptor += ")" + fn_line.ret_ty_info.java_fn_ty_arg
 380                 java_methods.append((fn_line.fn_name, java_method_descriptor))
 381
 382                 out_interface_implementation_overrides += f"): {fn_line.ret_ty_info.java_ty} {{\n"
 383
 384                 interface_method_override_inset = "\t\t\t\t\t\t"
 385                 interface_implementation_inset = "\t\t\t\t\t\t\t"
 386                 for arg_info in fn_line.args_ty:
 387                     if arg_info.to_hu_conv is not None:
 388                         out_interface_implementation_overrides += interface_implementation_inset + arg_info.to_hu_conv.replace("\n", "\n\t\t\t\t") + "\n"
 389
 390                 if fn_line.ret_ty_info.java_ty != "void":
 391                     out_interface_implementation_overrides += interface_implementation_inset + fn_line.ret_ty_info.java_hu_ty + " ret = arg." + fn_line.fn_name + "("
 392                 else:
 393                     out_interface_implementation_overrides += f"{interface_implementation_inset}arg." + fn_line.fn_name + "("
 394
 395                 for idx, arg_info in enumerate(fn_line.args_ty):
 396                     if idx != 0:
 397                         out_interface_implementation_overrides += ", "
 398                     if arg_info.to_hu_conv_name is not None:
 399                         out_interface_implementation_overrides += arg_info.to_hu_conv_name
 400                     else:
 401                         out_interface_implementation_overrides += arg_info.arg_name
 402
 403                 out_interface_implementation_overrides += ");\n"
 404                 if fn_line.ret_ty_info.java_ty != "void":
 405                     if fn_line.ret_ty_info.from_hu_conv is not None:
 406                         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"
 407                         if fn_line.ret_ty_info.from_hu_conv[1] != "":
 408                             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"
 409                         #if fn_line.ret_ty_info.rust_obj in result_types:
 410                         # XXX: We need to handle this in conversion logic so that its cross-language!
 411                         # Avoid double-free by breaking the result - we should learn to clone these and then we can be safe instead
 412                         #    out_interface_implementation_overrides = out_interface_implementation_overrides + "\t\t\t\tret.ptr = 0;\n"
 413                         out_interface_implementation_overrides = out_interface_implementation_overrides + "\t\t\t\treturn result;\n"
 414                     else:
 415                         out_interface_implementation_overrides = out_interface_implementation_overrides + "\t\t\t\treturn ret;\n"
 416                 out_interface_implementation_overrides += f"{interface_method_override_inset}}},\n\n{interface_method_override_inset}"
 417
 418         trait_constructor_arguments = ""
 419         for var in field_var_conversions:
 420             if isinstance(var, ConvInfo):
 421                 trait_constructor_arguments += ", " + var.arg_name
 422             else:
 423                 trait_constructor_arguments += ", " + var[1] + ".new_impl(" + var[1] + "_impl).bindings_instance"
 424
 425         out_typescript_human = f"""
 426             {self.hu_struct_file_prefix}
 427
 428             export class {struct_name.replace("LDK","")} extends CommonBase {{
 429
 430                 bindings_instance?: bindings.{struct_name};
 431
 432                 constructor(ptr?: number, arg?: bindings.{struct_name}{constructor_arguments}) {{
 433                     if (Number.isFinite(ptr)) {{
 434                                         super(ptr);
 435                                         this.bindings_instance = null;
 436                                     }} else {{
 437                                         // TODO: private constructor instantiation
 438                                         super(bindings.{struct_name}_new(arg{super_instantiator}));
 439                                         this.ptrs_to.push(arg);
 440                                         {pointer_to_adder}
 441                                     }}
 442                 }}
 443
 444                 protected finalize() {{
 445                     if (this.ptr != 0) {{
 446                         bindings.{struct_name.replace("LDK","")}_free(this.ptr);
 447                     }}
 448                     super.finalize();
 449                 }}
 450
 451                 static new_impl(arg: {struct_name.replace("LDK", "")}Interface{impl_constructor_arguments}): {struct_name.replace("LDK", "")} {{
 452                     const impl_holder: {struct_name}Holder = new {struct_name}Holder();
 453                     let structImplementation = <bindings.{struct_name}>{{
 454                         // todo: in-line interface filling
 455                         {out_interface_implementation_overrides}
 456                     }};
 457                     impl_holder.held = new {struct_name.replace("LDK", "")} (null, structImplementation{trait_constructor_arguments});
 458                 }}
 459             }}
 460
 461             export interface {struct_name.replace("LDK", "")}Interface {{
 462                 {out_java_interface}
 463             }}
 464
 465             class {struct_name}Holder {{
 466                 held: {struct_name.replace("LDK", "")};
 467             }}
 468 """
 469
 470         out_typescript_bindings += "\t\texport interface " + struct_name + " {\n"
 471         java_meths = []
 472         for fn_line in field_function_lines:
 473             if fn_line.fn_name != "free" and fn_line.fn_name != "clone":
 474                 out_typescript_bindings += f"\t\t\t{fn_line.fn_name} ("
 475
 476                 for idx, arg_conv_info in enumerate(fn_line.args_ty):
 477                     if idx >= 1:
 478                         out_typescript_bindings = out_typescript_bindings + ", "
 479                     out_typescript_bindings += f"{arg_conv_info.arg_name}: {arg_conv_info.java_ty}"
 480
 481                 out_typescript_bindings += f"): {fn_line.ret_ty_info.java_ty};\n"
 482
 483         out_typescript_bindings = out_typescript_bindings + "\t\t}\n\n"
 484
 485         out_typescript_bindings += f"\t\texport function {struct_name}_new(impl: {struct_name}"
 486         for var in field_var_conversions:
 487             if isinstance(var, ConvInfo):
 488                 out_typescript_bindings += f", {var.arg_name}: {var.java_ty}"
 489             else:
 490                 out_typescript_bindings += f", {var[1]}: {var[0]}"
 491
 492         out_typescript_bindings += f"""): number {{
 493             throw new Error('unimplemented'); // TODO: bind to WASM
 494         }}
 495 """
 496
 497         out_typescript_bindings += '\n// OUT_TYPESCRIPT_BINDINGS :: MAP_TRAIT :: END\n\n\n'
 498
 499         # Now that we've written out our java code (and created java_meths), generate C
 500         out_c = "typedef struct " + struct_name + "_JCalls {\n"
 501         out_c = out_c + "\tatomic_size_t refcnt;\n"
 502         out_c = out_c + "\t// TODO: Object pointer o;\n"
 503         for var in field_var_conversions:
 504             if isinstance(var, ConvInfo):
 505                 # We're a regular ol' field
 506                 pass
 507             else:
 508                 # We're a supertrait
 509                 out_c = out_c + "\t" + var[0] + "_JCalls* " + var[1] + ";\n"
 510         for fn in field_function_lines:
 511             if fn.fn_name != "free" and fn.fn_name != "clone":
 512                 out_c = out_c + "\t// TODO: Some kind of method pointer " + fn.fn_name + "_meth;\n"
 513         out_c = out_c + "} " + struct_name + "_JCalls;\n"
 514
 515         for fn_line in field_function_lines:
 516             if fn_line.fn_name == "free":
 517                 out_c = out_c + "static void " + struct_name + "_JCalls_free(void* this_arg) {\n"
 518                 out_c = out_c + "\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n"
 519                 out_c = out_c + "\tif (atomic_fetch_sub_explicit(&j_calls->refcnt, 1, memory_order_acquire) == 1) {\n"
 520                 out_c = out_c + "\t\t// TODO: do any release required for j_calls->o (refcnt-- in java, but may be redundant)\n"
 521                 out_c = out_c + "\t\tFREE(j_calls);\n"
 522                 out_c = out_c + "\t}\n}\n"
 523
 524         for idx, fn_line in enumerate(field_function_lines):
 525             if fn_line.fn_name != "free" and fn_line.fn_name != "clone":
 526                 assert fn_line.ret_ty_info.ty_info.get_full_rust_ty()[1] == ""
 527                 out_c = out_c + fn_line.ret_ty_info.ty_info.get_full_rust_ty()[0] + " " + fn_line.fn_name + "_jcall("
 528                 if fn_line.self_is_const:
 529                     out_c = out_c + "const void* this_arg"
 530                 else:
 531                     out_c = out_c + "void* this_arg"
 532
 533                 for idx, arg in enumerate(fn_line.args_ty):
 534                     out_c = out_c + ", " + arg.ty_info.get_full_rust_ty()[0] + " " + arg.arg_name + arg.ty_info.get_full_rust_ty()[1]
 535
 536                 out_c = out_c + ") {\n"
 537                 out_c = out_c + "\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n"
 538
 539                 for arg_info in fn_line.args_ty:
 540                     if arg_info.ret_conv is not None:
 541                         out_c = out_c + "\t" + arg_info.ret_conv[0].replace('\n', '\n\t')
 542                         out_c = out_c + arg_info.arg_name
 543                         out_c = out_c + arg_info.ret_conv[1].replace('\n', '\n\t') + "\n"
 544
 545                 out_c = out_c + "\t//TODO: jobject obj = get object we can call against on j_calls->o\n"
 546                 if fn_line.ret_ty_info.c_ty.endswith("Array"):
 547                     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"
 548                 elif fn_line.ret_ty_info.java_ty == "void":
 549                     out_c = out_c + "\treturn; //TODO: Call " + fn_line.fn_name + " on j_calls with instance obj"
 550                 elif not fn_line.ret_ty_info.passed_as_ptr:
 551                     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
 552                 else:
 553                     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"
 554
 555                 for idx, arg_info in enumerate(fn_line.args_ty):
 556                     if arg_info.ret_conv is not None:
 557                         out_c = out_c + ", " + arg_info.ret_conv_name
 558                     else:
 559                         out_c = out_c + ", " + arg_info.arg_name
 560                 out_c = out_c + ");\n"
 561                 if fn_line.ret_ty_info.arg_conv is not None:
 562                     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"
 563
 564                 out_c = out_c + "}\n"
 565
 566         # Write out a clone function whether we need one or not, as we use them in moving to rust
 567         out_c = out_c + "static void* " + struct_name + "_JCalls_clone(const void* this_arg) {\n"
 568         out_c = out_c + "\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n"
 569         out_c = out_c + "\tatomic_fetch_add_explicit(&j_calls->refcnt, 1, memory_order_release);\n"
 570         for var in field_var_conversions:
 571             if not isinstance(var, ConvInfo):
 572                 out_c = out_c + "\tatomic_fetch_add_explicit(&j_calls->" + var[1] + "->refcnt, 1, memory_order_release);\n"
 573         out_c = out_c + "\treturn (void*) this_arg;\n"
 574         out_c = out_c + "}\n"
 575
 576         out_c = out_c + "static inline " + struct_name + " " + struct_name + "_init (" + self.c_fn_args_pfx + ", /*TODO: JS Object Reference */void* o"
 577         for var in field_var_conversions:
 578             if isinstance(var, ConvInfo):
 579                 out_c = out_c + ", " + var.c_ty + " " + var.arg_name
 580             else:
 581                 out_c = out_c + ", /*TODO: JS Object Reference */void* " + var[1]
 582         out_c = out_c + ") {\n"
 583
 584         out_c = out_c + "\t" + struct_name + "_JCalls *calls = MALLOC(sizeof(" + struct_name + "_JCalls), \"" + struct_name + "_JCalls\");\n"
 585         out_c = out_c + "\tatomic_init(&calls->refcnt, 1);\n"
 586         out_c = out_c + "\t//TODO: Assign calls->o from o\n"
 587
 588         for (fn_name, java_meth_descr) in java_meths:
 589             if fn_name != "free" and fn_name != "clone":
 590                 out_c = out_c + "\tcalls->" + fn_name + "_meth = (*env)->GetMethodID(env, c, \"" + fn_name + "\", \"" + java_meth_descr + "\");\n"
 591                 out_c = out_c + "\tCHECK(calls->" + fn_name + "_meth != NULL);\n"
 592
 593         for var in field_var_conversions:
 594             if isinstance(var, ConvInfo) and var.arg_conv is not None:
 595                 out_c = out_c + "\n\t" + var.arg_conv.replace("\n", "\n\t") +"\n"
 596         out_c = out_c + "\n\t" + struct_name + " ret = {\n"
 597         out_c = out_c + "\t\t.this_arg = (void*) calls,\n"
 598         for fn_line in field_function_lines:
 599             if fn_line.fn_name != "free" and fn_line.fn_name != "clone":
 600                 out_c = out_c + "\t\t." + fn_line.fn_name + " = " + fn_line.fn_name + "_jcall,\n"
 601             elif fn_line.fn_name == "free":
 602                 out_c = out_c + "\t\t.free = " + struct_name + "_JCalls_free,\n"
 603             else:
 604                 out_c = out_c + "\t\t.clone = " + struct_name + "_JCalls_clone,\n"
 605         for var in field_var_conversions:
 606             if isinstance(var, ConvInfo):
 607                 if var.arg_conv_name is not None:
 608                     out_c = out_c + "\t\t." + var.arg_name + " = " + var.arg_conv_name + ",\n"
 609                     out_c = out_c + "\t\t.set_" + var.arg_name + " = NULL,\n"
 610                 else:
 611                     out_c = out_c + "\t\t." + var.var_name + " = " + var.var_name + ",\n"
 612                     out_c = out_c + "\t\t.set_" + var.var_name + " = NULL,\n"
 613             else:
 614                 out_c = out_c + "\t\t." + var[1] + " = " + var[0] + "_init(NULL, " + var[1] + "),\n"
 615         out_c = out_c + "\t};\n"
 616         for var in field_var_conversions:
 617             if not isinstance(var, ConvInfo):
 618                 out_c = out_c + "\tcalls->" + var[1] + " = ret." + var[1] + ".this_arg;\n"
 619         out_c = out_c + "\treturn ret;\n"
 620         out_c = out_c + "}\n"
 621
 622         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"
 623         for var in field_var_conversions:
 624             if isinstance(var, ConvInfo):
 625                 out_c = out_c + ", " + var.c_ty + " " + var.arg_name
 626             else:
 627                 out_c = out_c + ", /*TODO: JS Object Reference */ void* " + var[1]
 628         out_c = out_c + ") {\n"
 629         out_c = out_c + "\t" + struct_name + " *res_ptr = MALLOC(sizeof(" + struct_name + "), \"" + struct_name + "\");\n"
 630         out_c = out_c + "\t*res_ptr = " + struct_name + "_init(NULL, o"
 631         for var in field_var_conversions:
 632             if isinstance(var, ConvInfo):
 633                 out_c = out_c + ", " + var.arg_name
 634             else:
 635                 out_c = out_c + ", " + var[1]
 636         out_c = out_c + ");\n"
 637         out_c = out_c + "\treturn (long)res_ptr;\n"
 638         out_c = out_c + "}\n"
 639
 640         return (out_typescript_bindings, out_typescript_human, out_c)
 641
 642     def trait_struct_inc_refcnt(self, ty_info):
 643         return ""
 644
 645     def map_complex_enum(self, struct_name, variant_list, camel_to_snake):
 646         java_hu_type = struct_name.replace("LDK", "")
 647
 648         out_java_enum = ""
 649         out_java = ""
 650         out_c = ""
 651
 652         out_java_enum += (self.hu_struct_file_prefix)
 653         out_java_enum += ("export default class " + java_hu_type + " extends CommonBase {\n")
 654         out_java_enum += ("\tprotected constructor(_dummy: object, ptr: number) { super(ptr); }\n")
 655         out_java_enum += ("\tprotected finalize() {\n")
 656         out_java_enum += ("\t\tsuper.finalize();\n")
 657         out_java_enum += ("\t\tif (this.ptr != 0) { bindings." + java_hu_type + "_free(this.ptr); }\n")
 658         out_java_enum += ("\t}\n")
 659         out_java_enum += f"\tstatic constr_from_ptr(ptr: number): {java_hu_type} {{\n"
 660         out_java_enum += (f"\t\tconst raw_val: bindings.{struct_name} = bindings." + struct_name + "_ref_from_ptr(ptr);\n")
 661         java_hu_subclasses = ""
 662
 663         out_java +=  ("\tpublic static class " + struct_name + " {\n")
 664         out_java +=  ("\t\tprivate " + struct_name + "() {}\n")
 665         for var in variant_list:
 666             out_java +=  ("\t\texport class " + var.var_name + " extends " + struct_name + " {\n")
 667             java_hu_subclasses = java_hu_subclasses + "export class " + var.var_name + " extends " + java_hu_type + " {\n"
 668             out_java_enum += ("\t\tif (raw_val instanceof bindings." + struct_name + "." + var.var_name + ") {\n")
 669             out_java_enum += ("\t\t\treturn new " + var.var_name + "(this.ptr, raw_val);\n")
 670             init_meth_params = ""
 671             init_meth_body = ""
 672             hu_conv_body = ""
 673             for idx, field_ty in enumerate(var.fields):
 674                 out_java += ("\t\t\tpublic " + field_ty.java_ty + " " + field_ty.arg_name + ";\n")
 675                 java_hu_subclasses = java_hu_subclasses + "\tpublic " + field_ty.arg_name + f": {field_ty.java_hu_ty};\n"
 676                 if field_ty.to_hu_conv is not None:
 677                     hu_conv_body = hu_conv_body + "\t\tconst " + field_ty.arg_name + f": {field_ty.java_ty} = obj." + field_ty.arg_name + ";\n"
 678                     hu_conv_body = hu_conv_body + "\t\t" + field_ty.to_hu_conv.replace("\n", "\n\t\t\t") + "\n"
 679                     hu_conv_body = hu_conv_body + "\t\tthis." + field_ty.arg_name + " = " + field_ty.to_hu_conv_name + ";\n"
 680                 else:
 681                     hu_conv_body = hu_conv_body + "\t\tthis." + field_ty.arg_name + " = obj." + field_ty.arg_name + ";\n"
 682                 if idx > 0:
 683                     init_meth_params = init_meth_params + ", "
 684                 init_meth_params = init_meth_params + field_ty.java_ty + " " + field_ty.arg_name
 685                 init_meth_body = init_meth_body + "this." + field_ty.arg_name + " = " + field_ty.arg_name + "; "
 686             out_java +=  ("\t\t\t" + var.var_name + "(" + init_meth_params + ") { ")
 687             out_java +=  (init_meth_body)
 688             out_java +=  ("}\n")
 689             out_java += ("\t\t}\n")
 690             out_java_enum += ("\t\t}\n")
 691             java_hu_subclasses = java_hu_subclasses + "\tprivate constructor(ptr: number, obj: bindings." + struct_name + "." + var.var_name + ") {\n\t\tsuper(null, ptr);\n"
 692             java_hu_subclasses = java_hu_subclasses + hu_conv_body
 693             java_hu_subclasses = java_hu_subclasses + "\t}\n}\n"
 694         out_java += ("\t\tstatic native void init();\n")
 695         out_java += ("\t}\n")
 696         out_java_enum += ("\t\tthrow new Error('oops, this should be unreachable'); // Unreachable without extending the (internal) bindings interface\n\t}\n\n")
 697         out_java += ("\tstatic { " + struct_name + ".init(); }\n")
 698         out_java += ("\tpublic static native " + struct_name + " " + struct_name + "_ref_from_ptr(long ptr);\n");
 699
 700         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")
 701         out_c += ("\t" + struct_name + " *obj = (" + struct_name + "*)ptr;\n")
 702         out_c += ("\tswitch(obj->tag) {\n")
 703         for var in variant_list:
 704             out_c += ("\t\tcase " + struct_name + "_" + var.var_name + ": {\n")
 705             c_params = []
 706             for idx, field_map in enumerate(var.fields):
 707                 if field_map.ret_conv is not None:
 708                     out_c += ("\t\t\t" + field_map.ret_conv[0].replace("\n", "\n\t\t\t"))
 709                     out_c += ("obj->" + camel_to_snake(var.var_name) + "." + field_map.arg_name)
 710                     out_c += (field_map.ret_conv[1].replace("\n", "\n\t\t\t") + "\n")
 711                     c_params.append(field_map.ret_conv_name)
 712                 else:
 713                     c_params.append("obj->" + camel_to_snake(var.var_name) + "." + field_map.arg_name)
 714             out_c += ("\t\t\treturn " + self.c_constr_native_complex_enum(struct_name, var.var_name, c_params) + ";\n")
 715             out_c += ("\t\t}\n")
 716         out_c += ("\t\tdefault: abort();\n")
 717         out_c += ("\t}\n}\n")
 718         out_java_enum += ("}\n")
 719         out_java_enum += (java_hu_subclasses)
 720         return (out_java, out_java_enum, out_c)
 721
 722     def map_opaque_struct(self, struct_name):
 723         implementations = ""
 724         method_header = ""
 725         if struct_name.startswith("LDKLocked"):
 726             implementations += "implements AutoCloseable "
 727             method_header = """
 728                 public close() {
 729 """
 730         else:
 731             method_header = """
 732                 protected finalize() {
 733                     super.finalize();
 734 """
 735
 736         out_opaque_struct_human = f"""
 737             {self.hu_struct_file_prefix}
 738
 739             export default class {struct_name.replace("LDK","")} extends CommonBase {implementations}{{
 740                 constructor(_dummy: object, ptr: number) {{
 741                     super(ptr);
 742                 }}
 743
 744                 {method_header}
 745                     if (this.ptr != 0) {{
 746                         bindings.{struct_name.replace("LDK","")}_free(this.ptr);
 747                     }}
 748                 }}
 749 """
 750         return out_opaque_struct_human