_ 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.wasm_decoding_map = dict(
  24             int8_tArray = 'decodeArray'
  25         )
  26
  27         self.wasm_encoding_map = dict(
  28             int8_tArray = 'encodeArray',
  29         )
  30
  31         self.to_hu_conv_templates = dict(
  32             ptr = 'const {var_name}_hu_conv: {human_type} = new {human_type}(null, {var_name});',
  33             default = 'const {var_name}_hu_conv: {human_type} = new {human_type}(null, {var_name});',
  34         )
  35
  36         self.bindings_header = self.wasm_import_header(target) + """
  37 export class VecOrSliceDef {
  38     public dataptr: number;
  39     public datalen: number;
  40     public stride: number;
  41     public constructor(dataptr: number, datalen: number, stride: number) {
  42         this.dataptr = dataptr;
  43         this.datalen = datalen;
  44         this.stride = stride;
  45     }
  46 }
  47
  48 /*
  49 TODO: load WASM file
  50 static {
  51     System.loadLibrary(\"lightningjni\");
  52     init(java.lang.Enum.class, VecOrSliceDef.class);
  53     init_class_cache();
  54 }
  55
  56 static native void init(java.lang.Class c, java.lang.Class slicedef);
  57 static native void init_class_cache();
  58
  59 public static native boolean deref_bool(long ptr);
  60 public static native long deref_long(long ptr);
  61 public static native void free_heap_ptr(long ptr);
  62 public static native byte[] read_bytes(long ptr, long len);
  63 public static native byte[] get_u8_slice_bytes(long slice_ptr);
  64 public static native long bytes_to_u8_vec(byte[] bytes);
  65 public static native long new_txpointer_copy_data(byte[] txdata);
  66 public static native void txpointer_free(long ptr);
  67 public static native byte[] txpointer_get_buffer(long ptr);
  68 public static native long vec_slice_len(long vec);
  69 public static native long new_empty_slice_vec();
  70 */
  71
  72 """
  73
  74         self.bindings_footer = """
  75         export async function initializeWasm(allowDoubleInitialization: boolean = false): Promise<void> {
  76             if(isWasmInitialized && !allowDoubleInitialization) {
  77                 return;
  78             }
  79             const wasmInstance = await WebAssembly.instantiate(wasmModule, imports)
  80             wasm = wasmInstance.exports;
  81             isWasmInitialized = true;
  82         }
  83         """
  84
  85         self.common_base = """
  86             export default class CommonBase {
  87                 ptr: number;
  88                 ptrs_to: object[] = []; // new LinkedList(); TODO: build linked list implementation
  89                 protected constructor(ptr: number) { this.ptr = ptr; }
  90                 public _test_only_get_ptr(): number { return this.ptr; }
  91                 protected finalize() {
  92                     // TODO: finalize myself
  93                 }
  94             }
  95 """
  96
  97         self.c_file_pfx = """#include <rust_types.h>
  98 #include "js-wasm.h"
  99 #include <stdatomic.h>
 100 #include <lightning.h>
 101
 102 // These should be provided...somehow...
 103 void *memset(void *s, int c, size_t n);
 104 void *memcpy(void *dest, const void *src, size_t n);
 105 int memcmp(const void *s1, const void *s2, size_t n);
 106
 107 void __attribute__((noreturn)) abort(void);
 108 void assert(bool expression);
 109 """
 110
 111         if not DEBUG:
 112             self.c_file_pfx = self.c_file_pfx + """
 113 void *malloc(size_t size);
 114 void free(void *ptr);
 115
 116 #define MALLOC(a, _) malloc(a)
 117 #define FREE(p) if ((long)(p) > 1024) { free(p); }
 118 #define DO_ASSERT(a) (void)(a)
 119 #define CHECK(a)
 120 """
 121         else:
 122             self.c_file_pfx = self.c_file_pfx + """
 123 // Always run a, then assert it is true:
 124 #define DO_ASSERT(a) do { bool _assert_val = (a); assert(_assert_val); } while(0)
 125 // Assert a is true or do nothing
 126 #define CHECK(a) DO_ASSERT(a)
 127
 128 // Running a leak check across all the allocations and frees of the JDK is a mess,
 129 // so instead we implement our own naive leak checker here, relying on the -wrap
 130 // linker option to wrap malloc/calloc/realloc/free, tracking everyhing allocated
 131 // and free'd in Rust or C across the generated bindings shared library.
 132
 133 #define BT_MAX 128
 134 typedef struct allocation {
 135         struct allocation* next;
 136         void* ptr;
 137         const char* struct_name;
 138 } allocation;
 139 static allocation* allocation_ll = NULL;
 140
 141 void* __real_malloc(size_t len);
 142 void* __real_calloc(size_t nmemb, size_t len);
 143 static void new_allocation(void* res, const char* struct_name) {
 144         allocation* new_alloc = __real_malloc(sizeof(allocation));
 145         new_alloc->ptr = res;
 146         new_alloc->struct_name = struct_name;
 147         new_alloc->next = allocation_ll;
 148         allocation_ll = new_alloc;
 149 }
 150 static void* MALLOC(size_t len, const char* struct_name) {
 151         void* res = __real_malloc(len);
 152         new_allocation(res, struct_name);
 153         return res;
 154 }
 155 void __real_free(void* ptr);
 156 static void alloc_freed(void* ptr) {
 157         allocation* p = NULL;
 158         allocation* it = allocation_ll;
 159         while (it->ptr != ptr) {
 160                 p = it; it = it->next;
 161                 if (it == NULL) {
 162                         //XXX: fprintf(stderr, "Tried to free unknown pointer %p\\n", ptr);
 163                         return; // addrsan should catch malloc-unknown and print more info than we have
 164                 }
 165         }
 166         if (p) { p->next = it->next; } else { allocation_ll = it->next; }
 167         DO_ASSERT(it->ptr == ptr);
 168         __real_free(it);
 169 }
 170 static void FREE(void* ptr) {
 171         if ((long)ptr < 1024) return; // Rust loves to create pointers to the NULL page for dummys
 172         alloc_freed(ptr);
 173         __real_free(ptr);
 174 }
 175
 176 void* __wrap_malloc(size_t len) {
 177         void* res = __real_malloc(len);
 178         new_allocation(res, "malloc call");
 179         return res;
 180 }
 181 void* __wrap_calloc(size_t nmemb, size_t len) {
 182         void* res = __real_calloc(nmemb, len);
 183         new_allocation(res, "calloc call");
 184         return res;
 185 }
 186 void __wrap_free(void* ptr) {
 187         if (ptr == NULL) return;
 188         alloc_freed(ptr);
 189         __real_free(ptr);
 190 }
 191
 192 void* __real_realloc(void* ptr, size_t newlen);
 193 void* __wrap_realloc(void* ptr, size_t len) {
 194         if (ptr != NULL) alloc_freed(ptr);
 195         void* res = __real_realloc(ptr, len);
 196         new_allocation(res, "realloc call");
 197         return res;
 198 }
 199 void __wrap_reallocarray(void* ptr, size_t new_sz) {
 200         // Rust doesn't seem to use reallocarray currently
 201         DO_ASSERT(false);
 202 }
 203
 204 void __attribute__((destructor)) check_leaks() {
 205         for (allocation* a = allocation_ll; a != NULL; a = a->next) {
 206                 //XXX: fprintf(stderr, "%s %p remains\\n", a->struct_name, a->ptr);
 207         }
 208         DO_ASSERT(allocation_ll == NULL);
 209 }
 210 """
 211         self.c_file_pfx = self.c_file_pfx + """
 212 // We assume that CVec_u8Z and u8slice are the same size and layout (and thus pointers to the two can be mixed)
 213 _Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKu8slice), "Vec<u8> and [u8] need to have been mapped identically");
 214 _Static_assert(offsetof(LDKCVec_u8Z, data) == offsetof(LDKu8slice, data), "Vec<u8> and [u8] need to have been mapped identically");
 215 _Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKu8slice, datalen), "Vec<u8> and [u8] need to have been mapped identically");
 216
 217 _Static_assert(sizeof(void*) == 4, "Pointers mut be 32 bits");
 218
 219 typedef struct int64_tArray { uint32_t *len; /* len + 1 is data */ } int64_tArray;
 220 typedef struct uint32_tArray { uint32_t *len; /* len + 1 is data */ } uint32_tArray;
 221 typedef struct ptrArray { uint32_t *len; /* len + 1 is data */ } ptrArray;
 222 typedef struct int8_tArray { uint32_t *len; /* len + 1 is data */ } int8_tArray;
 223 typedef struct jstring {} jstring;
 224
 225 jstring conv_owned_string(const char* _src) { jstring a; return a; }
 226
 227 typedef bool jboolean;
 228
 229 """
 230
 231         self.hu_struct_file_prefix = f"""
 232 import CommonBase from './CommonBase';
 233 import * as bindings from '../bindings' // TODO: figure out location
 234
 235 """
 236         self.c_fn_ty_pfx = ""
 237         self.c_fn_name_pfx = ""
 238         self.c_fn_args_pfx = "void* ctx_TODO"
 239         self.file_ext = ".ts"
 240         self.ptr_c_ty = "uint32_t"
 241         self.ptr_native_ty = "uint32_t"
 242         self.result_c_ty = "uint32_t"
 243         self.owned_str_to_c_call = ("conv_owned_string(", ")")
 244         self.ptr_arr = "ptrArray"
 245         self.get_native_arr_len_call = ("*", ".len")
 246
 247     def release_native_arr_ptr_call(self, ty_info, arr_var, arr_ptr_var):
 248         return None
 249     def create_native_arr_call(self, arr_len, ty_info):
 250         if ty_info.c_ty == "int8_tArray":
 251             return "{ .len = MALLOC(" + arr_len + " + sizeof(uint32_t), \"Native " + ty_info.c_ty + " Bytes\") }"
 252         elif ty_info.c_ty == "int64_tArray":
 253             return "{ .len = MALLOC(" + arr_len + " * sizeof(int64_t) + sizeof(uint32_t), \"Native " + ty_info.c_ty + " Bytes\") }"
 254         elif ty_info.c_ty == "uint32_tArray":
 255             return "{ .len = MALLOC(" + arr_len + " * sizeof(int32_t) + sizeof(uint32_t), \"Native " + ty_info.c_ty + " Bytes\") }"
 256         elif ty_info.c_ty == "ptrArray":
 257             assert ty_info.subty is not None and ty_info.subty.c_ty.endswith("Array")
 258             return "{ .len = MALLOC(" + arr_len + " * sizeof(int32_t) + sizeof(uint32_t), \"Native Object Bytes\") }"
 259         else:
 260             print("Need to create arr!", ty_info.c_ty)
 261             return ty_info.c_ty
 262     def set_native_arr_contents(self, arr_name, arr_len, ty_info):
 263         if ty_info.c_ty == "int8_tArray":
 264             return ("memcpy(" + arr_name + ".len + 1, ", ", " + arr_len + ")")
 265         else:
 266             assert False
 267     def get_native_arr_contents(self, arr_name, dest_name, arr_len, ty_info, copy):
 268         if ty_info.c_ty == "int8_tArray":
 269             if copy:
 270                 return "memcpy(" + dest_name + ", " + arr_name + ".len + 1, " + arr_len + ")"
 271             else:
 272                 return "(int8_t*)(" + arr_name + ".len + 1)"
 273         else:
 274             return "(" + ty_info.subty.c_ty + "*)(" + arr_name + ".len + 1)"
 275     def get_native_arr_elem(self, arr_name, idxc, ty_info):
 276         assert False # Only called if above is None
 277     def get_native_arr_ptr_call(self, ty_info):
 278         if ty_info.subty is not None:
 279             return "(" + ty_info.subty.c_ty + "*)(", ".len + 1)"
 280         return "(" + ty_info.c_ty + "*)(", ".len + 1)"
 281     def get_native_arr_entry_call(self, ty_info, arr_name, idxc, entry_access):
 282         return None
 283     def cleanup_native_arr_ref_contents(self, arr_name, dest_name, arr_len, ty_info):
 284         if ty_info.c_ty == "int8_tArray":
 285             return None
 286         else:
 287             return None
 288
 289
 290     def wasm_import_header(self, target):
 291         if target == Target.NODEJS:
 292             return """
 293
 294 import * as fs from 'fs';
 295 const source = fs.readFileSync('./ldk.wasm');
 296
 297 const memory = new WebAssembly.Memory({initial: 256});
 298 const wasmModule = new WebAssembly.Module(source);
 299
 300 const imports: any = {};
 301 imports.env = {};
 302
 303 imports.env.memoryBase = 0;
 304 imports.env.memory = memory;
 305 imports.env.tableBase = 0;
 306 imports.env.table = new WebAssembly.Table({initial: 4, element: 'anyfunc'});
 307
 308 imports.env["abort"] = function () {
 309     console.error("ABORT");
 310 };
 311
 312 let wasm = null;
 313 let isWasmInitialized: boolean = false;
 314
 315
 316 // WASM CODEC
 317
 318 const nextMultipleOfFour = (value: number) => {
 319     return Math.ceil(value / 4) * 4;
 320 }
 321
 322 const encodeArray = (inputArray) => {
 323         const cArrayPointer = wasm.wasm_malloc((inputArray.length + 1) * 4);
 324         const arrayMemoryView = new Uint32Array(memory.buffer, cArrayPointer + 4, inputArray.length);
 325         arrayMemoryView.set(inputArray, 1);
 326     arrayMemoryView[0] = inputArray.length;
 327         return cArrayPointer;
 328 }
 329
 330 const getArrayLength = (arrayPointer) => {
 331         const arraySizeViewer = new Uint32Array(
 332                 memory.buffer, // value
 333                 arrayPointer, // offset
 334                 1 // one int
 335         );
 336         return arraySizeViewer[0];
 337 }
 338 const decodeUint8Array = (arrayPointer, free = true) => {
 339         const arraySize = getArrayLength(arrayPointer);
 340         const actualArrayViewer = new Uint8Array(
 341                 memory.buffer, // value
 342                 arrayPointer + 4, // offset (ignoring length bytes)
 343                 arraySize // uint8 count
 344         );
 345         // Clone the contents, TODO: In the future we should wrap the Viewer in a class that
 346         // will free the underlying memory when it becomes unreachable instead of copying here.
 347         const actualArray = actualArrayViewer.slice(0, arraySize);
 348         if (free) {
 349                 wasm.free(arrayPointer);
 350         }
 351         return actualArray;
 352 }
 353 const decodeUint32Array = (arrayPointer, free = true) => {
 354         const arraySize = getArrayLength(arrayPointer);
 355         const actualArrayViewer = new Uint32Array(
 356                 memory.buffer, // value
 357                 arrayPointer + 4, // offset (ignoring length bytes)
 358                 arraySize // uint32 count
 359         );
 360         // Clone the contents, TODO: In the future we should wrap the Viewer in a class that
 361         // will free the underlying memory when it becomes unreachable instead of copying here.
 362         const actualArray = actualArrayViewer.slice(0, arraySize);
 363         if (free) {
 364                 wasm.free(arrayPointer);
 365         }
 366         return actualArray;
 367 }
 368
 369 const encodeString = (string) => {
 370     // make malloc count divisible by 4
 371     const memoryNeed = nextMultipleOfFour(string.length + 1);
 372     const stringPointer = wasm.wasm_malloc(memoryNeed);
 373     const stringMemoryView = new Uint8Array(
 374         memory.buffer, // value
 375         stringPointer, // offset
 376         string.length + 1 // length
 377     );
 378     for (let i = 0; i < string.length; i++) {
 379         stringMemoryView[i] = string.charCodeAt(i);
 380     }
 381     stringMemoryView[string.length] = 0;
 382     return stringPointer;
 383 }
 384
 385 const decodeString = (stringPointer, free = true) => {
 386     const memoryView = new Uint8Array(memory.buffer, stringPointer);
 387     let cursor = 0;
 388     let result = '';
 389
 390     while (memoryView[cursor] !== 0) {
 391         result += String.fromCharCode(memoryView[cursor]);
 392         cursor++;
 393     }
 394
 395     if (free) {
 396         wasm.wasm_free(stringPointer);
 397     }
 398
 399     return result;
 400 };
 401
 402
 403             """
 404         return ''
 405
 406     def init_str(self):
 407         return ""
 408
 409     def native_c_unitary_enum_map(self, struct_name, variants):
 410         out_c = "static inline " + struct_name + " " + struct_name + "_from_js(int32_t ord) {\n"
 411         out_c = out_c + "\tswitch (ord) {\n"
 412         ord_v = 0
 413
 414         out_typescript_enum_fields = ""
 415
 416         for var in variants:
 417             out_c = out_c + "\t\tcase %d: return %s;\n" % (ord_v, var)
 418             ord_v = ord_v + 1
 419             out_typescript_enum_fields += f"{var},\n\t\t\t\t"
 420         out_c = out_c + "\t}\n"
 421         out_c = out_c + "\tabort();\n"
 422         out_c = out_c + "}\n"
 423
 424         out_c = out_c + "static inline int32_t " + struct_name + "_to_js(" + struct_name + " val) {\n"
 425         out_c = out_c + "\tswitch (val) {\n"
 426         ord_v = 0
 427         for var in variants:
 428             out_c = out_c + "\t\tcase " + var + ": return %d;\n" % ord_v
 429             ord_v = ord_v + 1
 430         out_c = out_c + "\t\tdefault: abort();\n"
 431         out_c = out_c + "\t}\n"
 432         out_c = out_c + "}\n"
 433
 434         out_typescript_enum = f"""
 435             export enum {struct_name} {{
 436                 {out_typescript_enum_fields}
 437             }}
 438 """
 439
 440         return (out_c, out_typescript_enum, "")
 441
 442     def c_unitary_enum_to_native_call(self, ty_info):
 443         return (ty_info.rust_obj + "_to_js(", ")")
 444     def native_unitary_enum_to_c_call(self, ty_info):
 445         return (ty_info.rust_obj + "_from_js(", ")")
 446
 447     def c_complex_enum_pass_ty(self, struct_name):
 448         return "uint32_t"
 449
 450     def c_constr_native_complex_enum(self, struct_name, variant, c_params):
 451         ret = "0 /* " + struct_name + " - " + variant + " */"
 452         for param in c_params:
 453             ret = ret + "; (void) " + param
 454         return ret
 455
 456     def native_c_map_trait(self, struct_name, field_var_conversions, field_function_lines):
 457         out_typescript_bindings = "\n\n\n// OUT_TYPESCRIPT_BINDINGS :: MAP_TRAIT :: START\n\n"
 458
 459         constructor_arguments = ""
 460         super_instantiator = ""
 461         pointer_to_adder = ""
 462         impl_constructor_arguments = ""
 463         for var in field_var_conversions:
 464             if isinstance(var, ConvInfo):
 465                 constructor_arguments += f", {first_to_lower(var.arg_name)}?: {var.java_hu_ty}"
 466                 impl_constructor_arguments += f", {var.arg_name}: {var.java_hu_ty}"
 467                 if var.from_hu_conv is not None:
 468                     super_instantiator += ", " + var.from_hu_conv[0]
 469                     if var.from_hu_conv[1] != "":
 470                         pointer_to_adder += var.from_hu_conv[1] + ";\n"
 471                 else:
 472                     super_instantiator += ", " + first_to_lower(var.arg_name)
 473             else:
 474                 constructor_arguments += f", {first_to_lower(var[1])}?: bindings.{var[0]}"
 475                 super_instantiator += ", " + first_to_lower(var[1])
 476                 pointer_to_adder += "this.ptrs_to.push(" + first_to_lower(var[1]) + ");\n"
 477                 impl_constructor_arguments += f", {first_to_lower(var[1])}_impl: {var[0].replace('LDK', '')}.{var[0].replace('LDK', '')}Interface"
 478
 479         # BUILD INTERFACE METHODS
 480         out_java_interface = ""
 481         out_interface_implementation_overrides = ""
 482         java_methods = []
 483         for fn_line in field_function_lines:
 484             java_method_descriptor = ""
 485             if fn_line.fn_name != "free" and fn_line.fn_name != "clone":
 486                 out_java_interface += fn_line.fn_name + "("
 487                 out_interface_implementation_overrides += f"{fn_line.fn_name} ("
 488
 489                 for idx, arg_conv_info in enumerate(fn_line.args_ty):
 490                     if idx >= 1:
 491                         out_java_interface += ", "
 492                         out_interface_implementation_overrides += ", "
 493                     out_java_interface += f"{arg_conv_info.arg_name}: {arg_conv_info.java_hu_ty}"
 494                     out_interface_implementation_overrides += f"{arg_conv_info.arg_name}: {arg_conv_info.java_ty}"
 495                     java_method_descriptor += arg_conv_info.java_fn_ty_arg
 496                 out_java_interface += f"): {fn_line.ret_ty_info.java_hu_ty};\n\t\t\t\t"
 497                 java_method_descriptor += ")" + fn_line.ret_ty_info.java_fn_ty_arg
 498                 java_methods.append((fn_line.fn_name, java_method_descriptor))
 499
 500                 out_interface_implementation_overrides += f"): {fn_line.ret_ty_info.java_ty} {{\n"
 501
 502                 interface_method_override_inset = "\t\t\t\t\t\t"
 503                 interface_implementation_inset = "\t\t\t\t\t\t\t"
 504                 for arg_info in fn_line.args_ty:
 505                     if arg_info.to_hu_conv is not None:
 506                         out_interface_implementation_overrides += interface_implementation_inset + arg_info.to_hu_conv.replace("\n", "\n\t\t\t\t") + "\n"
 507
 508                 if fn_line.ret_ty_info.java_ty != "void":
 509                     out_interface_implementation_overrides += interface_implementation_inset + fn_line.ret_ty_info.java_hu_ty + " ret = arg." + fn_line.fn_name + "("
 510                 else:
 511                     out_interface_implementation_overrides += f"{interface_implementation_inset}arg." + fn_line.fn_name + "("
 512
 513                 for idx, arg_info in enumerate(fn_line.args_ty):
 514                     if idx != 0:
 515                         out_interface_implementation_overrides += ", "
 516                     if arg_info.to_hu_conv_name is not None:
 517                         out_interface_implementation_overrides += arg_info.to_hu_conv_name
 518                     else:
 519                         out_interface_implementation_overrides += arg_info.arg_name
 520
 521                 out_interface_implementation_overrides += ");\n"
 522                 if fn_line.ret_ty_info.java_ty != "void":
 523                     if fn_line.ret_ty_info.from_hu_conv is not None:
 524                         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"
 525                         if fn_line.ret_ty_info.from_hu_conv[1] != "":
 526                             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"
 527                         #if fn_line.ret_ty_info.rust_obj in result_types:
 528                         # XXX: We need to handle this in conversion logic so that its cross-language!
 529                         # Avoid double-free by breaking the result - we should learn to clone these and then we can be safe instead
 530                         #    out_interface_implementation_overrides = out_interface_implementation_overrides + "\t\t\t\tret.ptr = 0;\n"
 531                         out_interface_implementation_overrides = out_interface_implementation_overrides + "\t\t\t\treturn result;\n"
 532                     else:
 533                         out_interface_implementation_overrides = out_interface_implementation_overrides + "\t\t\t\treturn ret;\n"
 534                 out_interface_implementation_overrides += f"{interface_method_override_inset}}},\n\n{interface_method_override_inset}"
 535
 536         trait_constructor_arguments = ""
 537         for var in field_var_conversions:
 538             if isinstance(var, ConvInfo):
 539                 trait_constructor_arguments += ", " + var.arg_name
 540             else:
 541                 trait_constructor_arguments += ", " + var[1] + ".new_impl(" + var[1] + "_impl).bindings_instance"
 542
 543         out_typescript_human = f"""
 544             {self.hu_struct_file_prefix}
 545
 546             export class {struct_name.replace("LDK","")} extends CommonBase {{
 547
 548                 bindings_instance?: bindings.{struct_name};
 549
 550                 constructor(ptr?: number, arg?: bindings.{struct_name}{constructor_arguments}) {{
 551                     if (Number.isFinite(ptr)) {{
 552                                         super(ptr);
 553                                         this.bindings_instance = null;
 554                                     }} else {{
 555                                         // TODO: private constructor instantiation
 556                                         super(bindings.{struct_name}_new(arg{super_instantiator}));
 557                                         this.ptrs_to.push(arg);
 558                                         {pointer_to_adder}
 559                                     }}
 560                 }}
 561
 562                 protected finalize() {{
 563                     if (this.ptr != 0) {{
 564                         bindings.{struct_name.replace("LDK","")}_free(this.ptr);
 565                     }}
 566                     super.finalize();
 567                 }}
 568
 569                 static new_impl(arg: {struct_name.replace("LDK", "")}Interface{impl_constructor_arguments}): {struct_name.replace("LDK", "")} {{
 570                     const impl_holder: {struct_name}Holder = new {struct_name}Holder();
 571                     let structImplementation = <bindings.{struct_name}>{{
 572                         // todo: in-line interface filling
 573                         {out_interface_implementation_overrides}
 574                     }};
 575                     impl_holder.held = new {struct_name.replace("LDK", "")} (null, structImplementation{trait_constructor_arguments});
 576                 }}
 577             }}
 578
 579             export interface {struct_name.replace("LDK", "")}Interface {{
 580                 {out_java_interface}
 581             }}
 582
 583             class {struct_name}Holder {{
 584                 held: {struct_name.replace("LDK", "")};
 585             }}
 586 """
 587
 588         out_typescript_bindings += "\t\texport interface " + struct_name + " {\n"
 589         java_meths = []
 590         for fn_line in field_function_lines:
 591             if fn_line.fn_name != "free" and fn_line.fn_name != "clone":
 592                 out_typescript_bindings += f"\t\t\t{fn_line.fn_name} ("
 593
 594                 for idx, arg_conv_info in enumerate(fn_line.args_ty):
 595                     if idx >= 1:
 596                         out_typescript_bindings = out_typescript_bindings + ", "
 597                     out_typescript_bindings += f"{arg_conv_info.arg_name}: {arg_conv_info.java_ty}"
 598
 599                 out_typescript_bindings += f"): {fn_line.ret_ty_info.java_ty};\n"
 600
 601         out_typescript_bindings = out_typescript_bindings + "\t\t}\n\n"
 602
 603         out_typescript_bindings += f"\t\texport function {struct_name}_new(impl: {struct_name}"
 604         for var in field_var_conversions:
 605             if isinstance(var, ConvInfo):
 606                 out_typescript_bindings += f", {var.arg_name}: {var.java_ty}"
 607             else:
 608                 out_typescript_bindings += f", {var[1]}: {var[0]}"
 609
 610         out_typescript_bindings += f"""): number {{
 611             throw new Error('unimplemented'); // TODO: bind to WASM
 612         }}
 613 """
 614
 615         out_typescript_bindings += '\n// OUT_TYPESCRIPT_BINDINGS :: MAP_TRAIT :: END\n\n\n'
 616
 617         # Now that we've written out our java code (and created java_meths), generate C
 618         out_c = "typedef struct " + struct_name + "_JCalls {\n"
 619         out_c = out_c + "\tatomic_size_t refcnt;\n"
 620         out_c = out_c + "\t// TODO: Object pointer o;\n"
 621         for var in field_var_conversions:
 622             if isinstance(var, ConvInfo):
 623                 # We're a regular ol' field
 624                 pass
 625             else:
 626                 # We're a supertrait
 627                 out_c = out_c + "\t" + var[0] + "_JCalls* " + var[1] + ";\n"
 628         for fn in field_function_lines:
 629             if fn.fn_name != "free" and fn.fn_name != "clone":
 630                 out_c = out_c + "\t// TODO: Some kind of method pointer " + fn.fn_name + "_meth;\n"
 631         out_c = out_c + "} " + struct_name + "_JCalls;\n"
 632
 633         for fn_line in field_function_lines:
 634             if fn_line.fn_name == "free":
 635                 out_c = out_c + "static void " + struct_name + "_JCalls_free(void* this_arg) {\n"
 636                 out_c = out_c + "\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n"
 637                 out_c = out_c + "\tif (atomic_fetch_sub_explicit(&j_calls->refcnt, 1, memory_order_acquire) == 1) {\n"
 638                 out_c = out_c + "\t\t// TODO: do any release required for j_calls->o (refcnt-- in java, but may be redundant)\n"
 639                 out_c = out_c + "\t\tFREE(j_calls);\n"
 640                 out_c = out_c + "\t}\n}\n"
 641
 642         for idx, fn_line in enumerate(field_function_lines):
 643             if fn_line.fn_name != "free" and fn_line.fn_name != "clone":
 644                 assert fn_line.ret_ty_info.ty_info.get_full_rust_ty()[1] == ""
 645                 out_c = out_c + fn_line.ret_ty_info.ty_info.get_full_rust_ty()[0] + " " + fn_line.fn_name + "_jcall("
 646                 if fn_line.self_is_const:
 647                     out_c = out_c + "const void* this_arg"
 648                 else:
 649                     out_c = out_c + "void* this_arg"
 650
 651                 for idx, arg in enumerate(fn_line.args_ty):
 652                     out_c = out_c + ", " + arg.ty_info.get_full_rust_ty()[0] + " " + arg.arg_name + arg.ty_info.get_full_rust_ty()[1]
 653
 654                 out_c = out_c + ") {\n"
 655                 out_c = out_c + "\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n"
 656
 657                 for arg_info in fn_line.args_ty:
 658                     if arg_info.ret_conv is not None:
 659                         out_c = out_c + "\t" + arg_info.ret_conv[0].replace('\n', '\n\t')
 660                         out_c = out_c + arg_info.arg_name
 661                         out_c = out_c + arg_info.ret_conv[1].replace('\n', '\n\t') + "\n"
 662
 663                 out_c = out_c + "\t//TODO: jobject obj = get object we can call against on j_calls->o\n"
 664                 if fn_line.ret_ty_info.c_ty.endswith("Array"):
 665                     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"
 666                 elif fn_line.ret_ty_info.java_ty == "void":
 667                     out_c = out_c + "\treturn; //TODO: Call " + fn_line.fn_name + " on j_calls with instance obj"
 668                 elif not fn_line.ret_ty_info.passed_as_ptr:
 669                     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
 670                 else:
 671                     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"
 672
 673                 for idx, arg_info in enumerate(fn_line.args_ty):
 674                     if arg_info.ret_conv is not None:
 675                         out_c = out_c + ", " + arg_info.ret_conv_name
 676                     else:
 677                         out_c = out_c + ", " + arg_info.arg_name
 678                 out_c = out_c + ");\n"
 679                 if fn_line.ret_ty_info.arg_conv is not None:
 680                     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"
 681
 682                 out_c = out_c + "}\n"
 683
 684         # Write out a clone function whether we need one or not, as we use them in moving to rust
 685         out_c = out_c + "static void* " + struct_name + "_JCalls_clone(const void* this_arg) {\n"
 686         out_c = out_c + "\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n"
 687         out_c = out_c + "\tatomic_fetch_add_explicit(&j_calls->refcnt, 1, memory_order_release);\n"
 688         for var in field_var_conversions:
 689             if not isinstance(var, ConvInfo):
 690                 out_c = out_c + "\tatomic_fetch_add_explicit(&j_calls->" + var[1] + "->refcnt, 1, memory_order_release);\n"
 691         out_c = out_c + "\treturn (void*) this_arg;\n"
 692         out_c = out_c + "}\n"
 693
 694         out_c = out_c + "static inline " + struct_name + " " + struct_name + "_init (" + self.c_fn_args_pfx + ", /*TODO: JS Object Reference */void* o"
 695         for var in field_var_conversions:
 696             if isinstance(var, ConvInfo):
 697                 out_c = out_c + ", " + var.c_ty + " " + var.arg_name
 698             else:
 699                 out_c = out_c + ", /*TODO: JS Object Reference */void* " + var[1]
 700         out_c = out_c + ") {\n"
 701
 702         out_c = out_c + "\t" + struct_name + "_JCalls *calls = MALLOC(sizeof(" + struct_name + "_JCalls), \"" + struct_name + "_JCalls\");\n"
 703         out_c = out_c + "\tatomic_init(&calls->refcnt, 1);\n"
 704         out_c = out_c + "\t//TODO: Assign calls->o from o\n"
 705
 706         for (fn_name, java_meth_descr) in java_meths:
 707             if fn_name != "free" and fn_name != "clone":
 708                 out_c = out_c + "\tcalls->" + fn_name + "_meth = (*env)->GetMethodID(env, c, \"" + fn_name + "\", \"" + java_meth_descr + "\");\n"
 709                 out_c = out_c + "\tCHECK(calls->" + fn_name + "_meth != NULL);\n"
 710
 711         for var in field_var_conversions:
 712             if isinstance(var, ConvInfo) and var.arg_conv is not None:
 713                 out_c = out_c + "\n\t" + var.arg_conv.replace("\n", "\n\t") +"\n"
 714         out_c = out_c + "\n\t" + struct_name + " ret = {\n"
 715         out_c = out_c + "\t\t.this_arg = (void*) calls,\n"
 716         for fn_line in field_function_lines:
 717             if fn_line.fn_name != "free" and fn_line.fn_name != "clone":
 718                 out_c = out_c + "\t\t." + fn_line.fn_name + " = " + fn_line.fn_name + "_jcall,\n"
 719             elif fn_line.fn_name == "free":
 720                 out_c = out_c + "\t\t.free = " + struct_name + "_JCalls_free,\n"
 721             else:
 722                 out_c = out_c + "\t\t.clone = " + struct_name + "_JCalls_clone,\n"
 723         for var in field_var_conversions:
 724             if isinstance(var, ConvInfo):
 725                 if var.arg_conv_name is not None:
 726                     out_c = out_c + "\t\t." + var.arg_name + " = " + var.arg_conv_name + ",\n"
 727                     out_c = out_c + "\t\t.set_" + var.arg_name + " = NULL,\n"
 728                 else:
 729                     out_c = out_c + "\t\t." + var.var_name + " = " + var.var_name + ",\n"
 730                     out_c = out_c + "\t\t.set_" + var.var_name + " = NULL,\n"
 731             else:
 732                 out_c = out_c + "\t\t." + var[1] + " = " + var[0] + "_init(NULL, " + var[1] + "),\n"
 733         out_c = out_c + "\t};\n"
 734         for var in field_var_conversions:
 735             if not isinstance(var, ConvInfo):
 736                 out_c = out_c + "\tcalls->" + var[1] + " = ret." + var[1] + ".this_arg;\n"
 737         out_c = out_c + "\treturn ret;\n"
 738         out_c = out_c + "}\n"
 739
 740         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"
 741         for var in field_var_conversions:
 742             if isinstance(var, ConvInfo):
 743                 out_c = out_c + ", " + var.c_ty + " " + var.arg_name
 744             else:
 745                 out_c = out_c + ", /*TODO: JS Object Reference */ void* " + var[1]
 746         out_c = out_c + ") {\n"
 747         out_c = out_c + "\t" + struct_name + " *res_ptr = MALLOC(sizeof(" + struct_name + "), \"" + struct_name + "\");\n"
 748         out_c = out_c + "\t*res_ptr = " + struct_name + "_init(NULL, o"
 749         for var in field_var_conversions:
 750             if isinstance(var, ConvInfo):
 751                 out_c = out_c + ", " + var.arg_name
 752             else:
 753                 out_c = out_c + ", " + var[1]
 754         out_c = out_c + ");\n"
 755         out_c = out_c + "\treturn (long)res_ptr;\n"
 756         out_c = out_c + "}\n"
 757
 758         return (out_typescript_bindings, out_typescript_human, out_c)
 759
 760     def trait_struct_inc_refcnt(self, ty_info):
 761         return ""
 762
 763     def map_complex_enum(self, struct_name, variant_list, camel_to_snake):
 764         java_hu_type = struct_name.replace("LDK", "")
 765
 766         out_java_enum = ""
 767         out_java = ""
 768         out_c = ""
 769
 770         out_java_enum += (self.hu_struct_file_prefix)
 771         out_java_enum += ("export default class " + java_hu_type + " extends CommonBase {\n")
 772         out_java_enum += ("\tprotected constructor(_dummy: object, ptr: number) { super(ptr); }\n")
 773         out_java_enum += ("\tprotected finalize() {\n")
 774         out_java_enum += ("\t\tsuper.finalize();\n")
 775         out_java_enum += ("\t\tif (this.ptr != 0) { bindings." + java_hu_type + "_free(this.ptr); }\n")
 776         out_java_enum += ("\t}\n")
 777         out_java_enum += f"\tstatic constr_from_ptr(ptr: number): {java_hu_type} {{\n"
 778         out_java_enum += (f"\t\tconst raw_val: bindings.{struct_name} = bindings." + struct_name + "_ref_from_ptr(ptr);\n")
 779         java_hu_subclasses = ""
 780
 781         out_java +=  ("\tpublic static class " + struct_name + " {\n")
 782         out_java +=  ("\t\tprivate " + struct_name + "() {}\n")
 783         for var in variant_list:
 784             out_java +=  ("\t\texport class " + var.var_name + " extends " + struct_name + " {\n")
 785             java_hu_subclasses = java_hu_subclasses + "export class " + var.var_name + " extends " + java_hu_type + " {\n"
 786             out_java_enum += ("\t\tif (raw_val instanceof bindings." + struct_name + "." + var.var_name + ") {\n")
 787             out_java_enum += ("\t\t\treturn new " + var.var_name + "(this.ptr, raw_val);\n")
 788             init_meth_params = ""
 789             init_meth_body = ""
 790             hu_conv_body = ""
 791             for idx, field_ty in enumerate(var.fields):
 792                 out_java += ("\t\t\tpublic " + field_ty.java_ty + " " + field_ty.arg_name + ";\n")
 793                 java_hu_subclasses = java_hu_subclasses + "\tpublic " + field_ty.arg_name + f": {field_ty.java_hu_ty};\n"
 794                 if field_ty.to_hu_conv is not None:
 795                     hu_conv_body = hu_conv_body + "\t\tconst " + field_ty.arg_name + f": {field_ty.java_ty} = obj." + field_ty.arg_name + ";\n"
 796                     hu_conv_body = hu_conv_body + "\t\t" + field_ty.to_hu_conv.replace("\n", "\n\t\t\t") + "\n"
 797                     hu_conv_body = hu_conv_body + "\t\tthis." + field_ty.arg_name + " = " + field_ty.to_hu_conv_name + ";\n"
 798                 else:
 799                     hu_conv_body = hu_conv_body + "\t\tthis." + field_ty.arg_name + " = obj." + field_ty.arg_name + ";\n"
 800                 if idx > 0:
 801                     init_meth_params = init_meth_params + ", "
 802                 init_meth_params = init_meth_params + field_ty.java_ty + " " + field_ty.arg_name
 803                 init_meth_body = init_meth_body + "this." + field_ty.arg_name + " = " + field_ty.arg_name + "; "
 804             out_java +=  ("\t\t\t" + var.var_name + "(" + init_meth_params + ") { ")
 805             out_java +=  (init_meth_body)
 806             out_java +=  ("}\n")
 807             out_java += ("\t\t}\n")
 808             out_java_enum += ("\t\t}\n")
 809             java_hu_subclasses = java_hu_subclasses + "\tprivate constructor(ptr: number, obj: bindings." + struct_name + "." + var.var_name + ") {\n\t\tsuper(null, ptr);\n"
 810             java_hu_subclasses = java_hu_subclasses + hu_conv_body
 811             java_hu_subclasses = java_hu_subclasses + "\t}\n}\n"
 812         out_java += ("\t\tstatic native void init();\n")
 813         out_java += ("\t}\n")
 814         out_java_enum += ("\t\tthrow new Error('oops, this should be unreachable'); // Unreachable without extending the (internal) bindings interface\n\t}\n\n")
 815         out_java += ("\tstatic { " + struct_name + ".init(); }\n")
 816         out_java += ("\tpublic static native " + struct_name + " " + struct_name + "_ref_from_ptr(long ptr);\n");
 817
 818         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")
 819         out_c += ("\t" + struct_name + " *obj = (" + struct_name + "*)ptr;\n")
 820         out_c += ("\tswitch(obj->tag) {\n")
 821         for var in variant_list:
 822             out_c += ("\t\tcase " + struct_name + "_" + var.var_name + ": {\n")
 823             c_params = []
 824             for idx, field_map in enumerate(var.fields):
 825                 if field_map.ret_conv is not None:
 826                     out_c += ("\t\t\t" + field_map.ret_conv[0].replace("\n", "\n\t\t\t"))
 827                     out_c += ("obj->" + camel_to_snake(var.var_name) + "." + field_map.arg_name)
 828                     out_c += (field_map.ret_conv[1].replace("\n", "\n\t\t\t") + "\n")
 829                     c_params.append(field_map.ret_conv_name)
 830                 else:
 831                     c_params.append("obj->" + camel_to_snake(var.var_name) + "." + field_map.arg_name)
 832             out_c += ("\t\t\treturn " + self.c_constr_native_complex_enum(struct_name, var.var_name, c_params) + ";\n")
 833             out_c += ("\t\t}\n")
 834         out_c += ("\t\tdefault: abort();\n")
 835         out_c += ("\t}\n}\n")
 836         out_java_enum += ("}\n")
 837         out_java_enum += (java_hu_subclasses)
 838         return (out_java, out_java_enum, out_c)
 839
 840     def map_opaque_struct(self, struct_name):
 841         implementations = ""
 842         method_header = ""
 843         if struct_name.startswith("LDKLocked"):
 844             implementations += "implements AutoCloseable "
 845             method_header = """
 846                 public close() {
 847 """
 848         else:
 849             method_header = """
 850                 protected finalize() {
 851                     super.finalize();
 852 """
 853
 854         out_opaque_struct_human = f"""
 855             {self.hu_struct_file_prefix}
 856
 857             export default class {struct_name.replace("LDK","")} extends CommonBase {implementations}{{
 858                 constructor(_dummy: object, ptr: number) {{
 859                     super(ptr);
 860                 }}
 861
 862                 {method_header}
 863                     if (this.ptr != 0) {{
 864                         bindings.{struct_name.replace("LDK","")}_free(this.ptr);
 865                     }}
 866                 }}
 867 """
 868         return out_opaque_struct_human
 869
 870     def map_function(self, argument_types, c_call_string, is_free, method_name, return_type_info, struct_meth, default_constructor_args, takes_self, args_known, has_out_java_struct: bool, type_mapping_generator):
 871         out_java = ""
 872         out_c = ""
 873         out_java_struct = None
 874
 875         out_java += ("\tpublic static native ")
 876         out_c += (self.c_fn_ty_pfx)
 877         out_c += (return_type_info.c_ty)
 878         out_java += (return_type_info.java_ty)
 879         if return_type_info.ret_conv is not None:
 880             ret_conv_pfx, ret_conv_sfx = return_type_info.ret_conv
 881         out_java += (" " + method_name + "(")
 882         out_c += (" " + self.c_fn_name_pfx + method_name.replace('_', '_1') + "(" + self.c_fn_args_pfx)
 883
 884         method_argument_string = ""
 885         native_call_argument_string = ""
 886         for idx, arg_conv_info in enumerate(argument_types):
 887             if idx != 0:
 888                 method_argument_string += (", ")
 889                 native_call_argument_string += ', '
 890             if arg_conv_info.c_ty != "void":
 891                 out_c += (", ")
 892             if arg_conv_info.c_ty != "void":
 893                 out_c += (arg_conv_info.c_ty + " " + arg_conv_info.arg_name)
 894                 needs_encoding = arg_conv_info.c_ty in self.wasm_encoding_map
 895                 native_argument = arg_conv_info.arg_name
 896                 if needs_encoding:
 897                     converter = self.wasm_encoding_map[arg_conv_info.c_ty]
 898                     native_argument = f"{converter}({arg_conv_info.arg_name})"
 899                 method_argument_string += f"{arg_conv_info.arg_name}: {arg_conv_info.java_ty}"
 900                 native_call_argument_string += native_argument
 901
 902         has_return_value = return_type_info.c_ty != 'void'
 903         needs_decoding = return_type_info.c_ty in self.wasm_decoding_map
 904         return_statement = 'return nativeResponseValue;'
 905         if not has_return_value:
 906             return_statement = '// debug statements here'
 907         elif needs_decoding:
 908             converter = self.wasm_decoding_map[return_type_info.c_ty]
 909             return_statement = f"return {converter}(nativeResponseValue);"
 910
 911         out_java = f"""\texport function {method_name}({method_argument_string}): {return_type_info.java_ty} {{
 912             if(!isWasmInitialized){{
 913                 throw new Error("initializeWasm() must be awaited first!");
 914             }}
 915             const nativeResponseValue = wasm.{method_name}({native_call_argument_string});
 916             {return_statement}\n\t}}
 917         \n"""
 918
 919
 920
 921         if has_out_java_struct:
 922             out_java_struct = ""
 923             if not args_known:
 924                 out_java_struct += ("\t// Skipped " + method_name + "\n")
 925                 has_out_java_struct = False
 926             else:
 927                 meth_n = method_name[len(struct_meth) + 1:]
 928                 if not takes_self:
 929                     out_java_struct += (
 930                             "\tpublic static " + return_type_info.java_hu_ty + " constructor_" + meth_n + "(")
 931                 else:
 932                     out_java_struct += ("\tpublic " + return_type_info.java_hu_ty + " " + meth_n + "(")
 933                 for idx, arg in enumerate(argument_types):
 934                     if idx != 0:
 935                         if not takes_self or idx > 1:
 936                             out_java_struct += (", ")
 937                     elif takes_self:
 938                         continue
 939                     if arg.java_ty != "void":
 940                         if arg.arg_name in default_constructor_args:
 941                             for explode_idx, explode_arg in enumerate(default_constructor_args[arg.arg_name]):
 942                                 if explode_idx != 0:
 943                                     out_java_struct += (", ")
 944                                 out_java_struct += (
 945                                         explode_arg.java_hu_ty + " " + arg.arg_name + "_" + explode_arg.arg_name)
 946                         else:
 947                             out_java_struct += (arg.java_hu_ty + " " + arg.arg_name)
 948
 949         out_c += (") {\n")
 950         if out_java_struct is not None:
 951             out_java_struct += (") {\n")
 952         for info in argument_types:
 953             if info.arg_conv is not None:
 954                 out_c += ("\t" + info.arg_conv.replace('\n', "\n\t") + "\n")
 955         if return_type_info.ret_conv is not None:
 956             out_c += ("\t" + ret_conv_pfx.replace('\n', '\n\t'))
 957         elif return_type_info.c_ty != "void":
 958             out_c += ("\t" + return_type_info.c_ty + " ret_val = ")
 959         else:
 960             out_c += ("\t")
 961         if c_call_string is None:
 962             out_c += (method_name + "(")
 963         else:
 964             out_c += (c_call_string)
 965         for idx, info in enumerate(argument_types):
 966             if info.arg_conv_name is not None:
 967                 if idx != 0:
 968                     out_c += (", ")
 969                 elif c_call_string is not None:
 970                     continue
 971                 out_c += (info.arg_conv_name)
 972         out_c += (")")
 973         if return_type_info.ret_conv is not None:
 974             out_c += (ret_conv_sfx.replace('\n', '\n\t'))
 975         else:
 976             out_c += (";")
 977         for info in argument_types:
 978             if info.arg_conv_cleanup is not None:
 979                 out_c += ("\n\t" + info.arg_conv_cleanup.replace("\n", "\n\t"))
 980         if return_type_info.ret_conv is not None:
 981             out_c += ("\n\treturn " + return_type_info.ret_conv_name + ";")
 982         elif return_type_info.c_ty != "void":
 983             out_c += ("\n\treturn ret_val;")
 984         out_c += ("\n}\n\n")
 985
 986         if has_out_java_struct:
 987             out_java_struct += ("\t\t")
 988             if return_type_info.java_ty != "void":
 989                 out_java_struct += (return_type_info.java_ty + " ret = ")
 990             out_java_struct += ("bindings." + method_name + "(")
 991             for idx, info in enumerate(argument_types):
 992                 if idx != 0:
 993                     out_java_struct += (", ")
 994                 if idx == 0 and takes_self:
 995                     out_java_struct += ("this.ptr")
 996                 elif info.arg_name in default_constructor_args:
 997                     out_java_struct += ("bindings." + info.java_hu_ty + "_new(")
 998                     for explode_idx, explode_arg in enumerate(default_constructor_args[info.arg_name]):
 999                         if explode_idx != 0:
1000                             out_java_struct += (", ")
1001                         expl_arg_name = info.arg_name + "_" + explode_arg.arg_name
1002                         if explode_arg.from_hu_conv is not None:
1003                             out_java_struct += (
1004                                 explode_arg.from_hu_conv[0].replace(explode_arg.arg_name, expl_arg_name))
1005                         else:
1006                             out_java_struct += (expl_arg_name)
1007                     out_java_struct += (")")
1008                 elif info.from_hu_conv is not None:
1009                     out_java_struct += (info.from_hu_conv[0])
1010                 else:
1011                     out_java_struct += (info.arg_name)
1012             out_java_struct += (");\n")
1013             if return_type_info.to_hu_conv is not None:
1014                 if not takes_self:
1015                     out_java_struct += ("\t\t" + return_type_info.to_hu_conv.replace("\n", "\n\t\t").replace("this",
1016                                                                                                              return_type_info.to_hu_conv_name) + "\n")
1017                 else:
1018                     out_java_struct += ("\t\t" + return_type_info.to_hu_conv.replace("\n", "\n\t\t") + "\n")
1019
1020             for idx, info in enumerate(argument_types):
1021                 if idx == 0 and takes_self:
1022                     pass
1023                 elif info.arg_name in default_constructor_args:
1024                     for explode_arg in default_constructor_args[info.arg_name]:
1025                         expl_arg_name = info.arg_name + "_" + explode_arg.arg_name
1026                         if explode_arg.from_hu_conv is not None and return_type_info.to_hu_conv_name:
1027                             out_java_struct += ("\t\t" + explode_arg.from_hu_conv[1].replace(explode_arg.arg_name,
1028                                                                                              expl_arg_name).replace(
1029                                 "this", return_type_info.to_hu_conv_name) + ";\n")
1030                 elif info.from_hu_conv is not None and info.from_hu_conv[1] != "":
1031                     if not takes_self and return_type_info.to_hu_conv_name is not None:
1032                         out_java_struct += (
1033                                 "\t\t" + info.from_hu_conv[1].replace("this", return_type_info.to_hu_conv_name) + ";\n")
1034                     else:
1035                         out_java_struct += ("\t\t" + info.from_hu_conv[1] + ";\n")
1036
1037             if return_type_info.to_hu_conv_name is not None:
1038                 out_java_struct += ("\t\treturn " + return_type_info.to_hu_conv_name + ";\n")
1039             elif return_type_info.java_ty != "void" and return_type_info.rust_obj != "LDK" + struct_meth:
1040                 out_java_struct += ("\t\treturn ret;\n")
1041             out_java_struct += ("\t}\n\n")
1042
1043         return (out_java, out_c, out_java_struct)