_ 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 = "number"
 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     def wasm_import_header(self, target):
 290         if target == Target.NODEJS:
 291             return """
 292 import * as fs from 'fs';
 293 const source = fs.readFileSync('./ldk.wasm');
 294
 295 const memory = new WebAssembly.Memory({initial: 256});
 296 const wasmModule = new WebAssembly.Module(source);
 297
 298 const imports: any = {};
 299 imports.env = {};
 300
 301 imports.env.memoryBase = 0;
 302 imports.env.memory = memory;
 303 imports.env.tableBase = 0;
 304 imports.env.table = new WebAssembly.Table({initial: 4, element: 'anyfunc'});
 305
 306 imports.env["abort"] = function () {
 307     console.error("ABORT");
 308 };
 309
 310 let wasm = null;
 311 let isWasmInitialized: boolean = false;
 312
 313
 314 // WASM CODEC
 315
 316 const nextMultipleOfFour = (value: number) => {
 317     return Math.ceil(value / 4) * 4;
 318 }
 319
 320 const encodeArray = (inputArray) => {
 321         const cArrayPointer = wasm.wasm_malloc((inputArray.length + 1) * 4);
 322         const arrayMemoryView = new Uint32Array(memory.buffer, cArrayPointer + 4, inputArray.length);
 323         arrayMemoryView.set(inputArray, 1);
 324     arrayMemoryView[0] = inputArray.length;
 325         return cArrayPointer;
 326 }
 327
 328 const getArrayLength = (arrayPointer) => {
 329         const arraySizeViewer = new Uint32Array(
 330                 memory.buffer, // value
 331                 arrayPointer, // offset
 332                 1 // one int
 333         );
 334         return arraySizeViewer[0];
 335 }
 336 const decodeUint8Array = (arrayPointer, free = true) => {
 337         const arraySize = getArrayLength(arrayPointer);
 338         const actualArrayViewer = new Uint8Array(
 339                 memory.buffer, // value
 340                 arrayPointer + 4, // offset (ignoring length bytes)
 341                 arraySize // uint8 count
 342         );
 343         // Clone the contents, TODO: In the future we should wrap the Viewer in a class that
 344         // will free the underlying memory when it becomes unreachable instead of copying here.
 345         const actualArray = actualArrayViewer.slice(0, arraySize);
 346         if (free) {
 347                 wasm.free(arrayPointer);
 348         }
 349         return actualArray;
 350 }
 351 const decodeUint32Array = (arrayPointer, free = true) => {
 352         const arraySize = getArrayLength(arrayPointer);
 353         const actualArrayViewer = new Uint32Array(
 354                 memory.buffer, // value
 355                 arrayPointer + 4, // offset (ignoring length bytes)
 356                 arraySize // uint32 count
 357         );
 358         // Clone the contents, TODO: In the future we should wrap the Viewer in a class that
 359         // will free the underlying memory when it becomes unreachable instead of copying here.
 360         const actualArray = actualArrayViewer.slice(0, arraySize);
 361         if (free) {
 362                 wasm.free(arrayPointer);
 363         }
 364         return actualArray;
 365 }
 366
 367 const encodeString = (string) => {
 368     // make malloc count divisible by 4
 369     const memoryNeed = nextMultipleOfFour(string.length + 1);
 370     const stringPointer = wasm.wasm_malloc(memoryNeed);
 371     const stringMemoryView = new Uint8Array(
 372         memory.buffer, // value
 373         stringPointer, // offset
 374         string.length + 1 // length
 375     );
 376     for (let i = 0; i < string.length; i++) {
 377         stringMemoryView[i] = string.charCodeAt(i);
 378     }
 379     stringMemoryView[string.length] = 0;
 380     return stringPointer;
 381 }
 382
 383 const decodeString = (stringPointer, free = true) => {
 384     const memoryView = new Uint8Array(memory.buffer, stringPointer);
 385     let cursor = 0;
 386     let result = '';
 387
 388     while (memoryView[cursor] !== 0) {
 389         result += String.fromCharCode(memoryView[cursor]);
 390         cursor++;
 391     }
 392
 393     if (free) {
 394         wasm.wasm_free(stringPointer);
 395     }
 396
 397     return result;
 398 };
 399 """
 400         return ''
 401
 402     def init_str(self):
 403         return ""
 404
 405     def native_c_unitary_enum_map(self, struct_name, variants):
 406         out_c = "static inline " + struct_name + " " + struct_name + "_from_js(int32_t ord) {\n"
 407         out_c = out_c + "\tswitch (ord) {\n"
 408         ord_v = 0
 409
 410         out_typescript_enum_fields = ""
 411
 412         for var in variants:
 413             out_c = out_c + "\t\tcase %d: return %s;\n" % (ord_v, var)
 414             ord_v = ord_v + 1
 415             out_typescript_enum_fields += f"{var},\n\t\t\t\t"
 416         out_c = out_c + "\t}\n"
 417         out_c = out_c + "\tabort();\n"
 418         out_c = out_c + "}\n"
 419
 420         out_c = out_c + "static inline int32_t " + struct_name + "_to_js(" + struct_name + " val) {\n"
 421         out_c = out_c + "\tswitch (val) {\n"
 422         ord_v = 0
 423         for var in variants:
 424             out_c = out_c + "\t\tcase " + var + ": return %d;\n" % ord_v
 425             ord_v = ord_v + 1
 426         out_c = out_c + "\t\tdefault: abort();\n"
 427         out_c = out_c + "\t}\n"
 428         out_c = out_c + "}\n"
 429
 430         out_typescript_enum = f"""
 431             export enum {struct_name} {{
 432                 {out_typescript_enum_fields}
 433             }}
 434 """
 435
 436         return (out_c, out_typescript_enum, "")
 437
 438     def c_unitary_enum_to_native_call(self, ty_info):
 439         return (ty_info.rust_obj + "_to_js(", ")")
 440     def native_unitary_enum_to_c_call(self, ty_info):
 441         return (ty_info.rust_obj + "_from_js(", ")")
 442
 443     def c_complex_enum_pass_ty(self, struct_name):
 444         return "uint32_t"
 445
 446     def c_constr_native_complex_enum(self, struct_name, variant, c_params):
 447         ret = "0 /* " + struct_name + " - " + variant + " */"
 448         for param in c_params:
 449             ret = ret + "; (void) " + param
 450         return ret
 451
 452     def native_c_map_trait(self, struct_name, field_var_conversions, field_function_lines):
 453         out_typescript_bindings = "\n\n\n// OUT_TYPESCRIPT_BINDINGS :: MAP_TRAIT :: START\n\n"
 454
 455         constructor_arguments = ""
 456         super_instantiator = ""
 457         pointer_to_adder = ""
 458         impl_constructor_arguments = ""
 459         for var in field_var_conversions:
 460             if isinstance(var, ConvInfo):
 461                 constructor_arguments += f", {first_to_lower(var.arg_name)}?: {var.java_hu_ty}"
 462                 impl_constructor_arguments += f", {var.arg_name}: {var.java_hu_ty}"
 463                 if var.from_hu_conv is not None:
 464                     super_instantiator += ", " + var.from_hu_conv[0]
 465                     if var.from_hu_conv[1] != "":
 466                         pointer_to_adder += var.from_hu_conv[1] + ";\n"
 467                 else:
 468                     super_instantiator += ", " + first_to_lower(var.arg_name)
 469             else:
 470                 constructor_arguments += f", {first_to_lower(var[1])}?: bindings.{var[0]}"
 471                 super_instantiator += ", " + first_to_lower(var[1])
 472                 pointer_to_adder += "this.ptrs_to.push(" + first_to_lower(var[1]) + ");\n"
 473                 impl_constructor_arguments += f", {first_to_lower(var[1])}_impl: {var[0].replace('LDK', '')}.{var[0].replace('LDK', '')}Interface"
 474
 475         # BUILD INTERFACE METHODS
 476         out_java_interface = ""
 477         out_interface_implementation_overrides = ""
 478         java_methods = []
 479         for fn_line in field_function_lines:
 480             java_method_descriptor = ""
 481             if fn_line.fn_name != "free" and fn_line.fn_name != "clone":
 482                 out_java_interface += fn_line.fn_name + "("
 483                 out_interface_implementation_overrides += f"{fn_line.fn_name} ("
 484
 485                 for idx, arg_conv_info in enumerate(fn_line.args_ty):
 486                     if idx >= 1:
 487                         out_java_interface += ", "
 488                         out_interface_implementation_overrides += ", "
 489                     out_java_interface += f"{arg_conv_info.arg_name}: {arg_conv_info.java_hu_ty}"
 490                     out_interface_implementation_overrides += f"{arg_conv_info.arg_name}: {arg_conv_info.java_ty}"
 491                     java_method_descriptor += arg_conv_info.java_fn_ty_arg
 492                 out_java_interface += f"): {fn_line.ret_ty_info.java_hu_ty};\n\t\t\t\t"
 493                 java_method_descriptor += ")" + fn_line.ret_ty_info.java_fn_ty_arg
 494                 java_methods.append((fn_line.fn_name, java_method_descriptor))
 495
 496                 out_interface_implementation_overrides += f"): {fn_line.ret_ty_info.java_ty} {{\n"
 497
 498                 interface_method_override_inset = "\t\t\t\t\t\t"
 499                 interface_implementation_inset = "\t\t\t\t\t\t\t"
 500                 for arg_info in fn_line.args_ty:
 501                     if arg_info.to_hu_conv is not None:
 502                         out_interface_implementation_overrides += interface_implementation_inset + arg_info.to_hu_conv.replace("\n", "\n\t\t\t\t") + "\n"
 503
 504                 if fn_line.ret_ty_info.java_ty != "void":
 505                     out_interface_implementation_overrides += interface_implementation_inset + fn_line.ret_ty_info.java_hu_ty + " ret = arg." + fn_line.fn_name + "("
 506                 else:
 507                     out_interface_implementation_overrides += f"{interface_implementation_inset}arg." + fn_line.fn_name + "("
 508
 509                 for idx, arg_info in enumerate(fn_line.args_ty):
 510                     if idx != 0:
 511                         out_interface_implementation_overrides += ", "
 512                     if arg_info.to_hu_conv_name is not None:
 513                         out_interface_implementation_overrides += arg_info.to_hu_conv_name
 514                     else:
 515                         out_interface_implementation_overrides += arg_info.arg_name
 516
 517                 out_interface_implementation_overrides += ");\n"
 518                 if fn_line.ret_ty_info.java_ty != "void":
 519                     if fn_line.ret_ty_info.from_hu_conv is not None:
 520                         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"
 521                         if fn_line.ret_ty_info.from_hu_conv[1] != "":
 522                             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"
 523                         #if fn_line.ret_ty_info.rust_obj in result_types:
 524                         # XXX: We need to handle this in conversion logic so that its cross-language!
 525                         # Avoid double-free by breaking the result - we should learn to clone these and then we can be safe instead
 526                         #    out_interface_implementation_overrides = out_interface_implementation_overrides + "\t\t\t\tret.ptr = 0;\n"
 527                         out_interface_implementation_overrides = out_interface_implementation_overrides + "\t\t\t\treturn result;\n"
 528                     else:
 529                         out_interface_implementation_overrides = out_interface_implementation_overrides + "\t\t\t\treturn ret;\n"
 530                 out_interface_implementation_overrides += f"{interface_method_override_inset}}},\n\n{interface_method_override_inset}"
 531
 532         trait_constructor_arguments = ""
 533         for var in field_var_conversions:
 534             if isinstance(var, ConvInfo):
 535                 trait_constructor_arguments += ", " + var.arg_name
 536             else:
 537                 trait_constructor_arguments += ", " + var[1] + ".new_impl(" + var[1] + "_impl).bindings_instance"
 538
 539         out_typescript_human = f"""
 540             {self.hu_struct_file_prefix}
 541
 542             export class {struct_name.replace("LDK","")} extends CommonBase {{
 543
 544                 bindings_instance?: bindings.{struct_name};
 545
 546                 constructor(ptr?: number, arg?: bindings.{struct_name}{constructor_arguments}) {{
 547                     if (Number.isFinite(ptr)) {{
 548                                         super(ptr);
 549                                         this.bindings_instance = null;
 550                                     }} else {{
 551                                         // TODO: private constructor instantiation
 552                                         super(bindings.{struct_name}_new(arg{super_instantiator}));
 553                                         this.ptrs_to.push(arg);
 554                                         {pointer_to_adder}
 555                                     }}
 556                 }}
 557
 558                 protected finalize() {{
 559                     if (this.ptr != 0) {{
 560                         bindings.{struct_name.replace("LDK","")}_free(this.ptr);
 561                     }}
 562                     super.finalize();
 563                 }}
 564
 565                 static new_impl(arg: {struct_name.replace("LDK", "")}Interface{impl_constructor_arguments}): {struct_name.replace("LDK", "")} {{
 566                     const impl_holder: {struct_name}Holder = new {struct_name}Holder();
 567                     let structImplementation = <bindings.{struct_name}>{{
 568                         // todo: in-line interface filling
 569                         {out_interface_implementation_overrides}
 570                     }};
 571                     impl_holder.held = new {struct_name.replace("LDK", "")} (null, structImplementation{trait_constructor_arguments});
 572                 }}
 573             }}
 574
 575             export interface {struct_name.replace("LDK", "")}Interface {{
 576                 {out_java_interface}
 577             }}
 578
 579             class {struct_name}Holder {{
 580                 held: {struct_name.replace("LDK", "")};
 581             }}
 582 """
 583
 584         out_typescript_bindings += "\t\texport interface " + struct_name + " {\n"
 585         java_meths = []
 586         for fn_line in field_function_lines:
 587             if fn_line.fn_name != "free" and fn_line.fn_name != "clone":
 588                 out_typescript_bindings += f"\t\t\t{fn_line.fn_name} ("
 589
 590                 for idx, arg_conv_info in enumerate(fn_line.args_ty):
 591                     if idx >= 1:
 592                         out_typescript_bindings = out_typescript_bindings + ", "
 593                     out_typescript_bindings += f"{arg_conv_info.arg_name}: {arg_conv_info.java_ty}"
 594
 595                 out_typescript_bindings += f"): {fn_line.ret_ty_info.java_ty};\n"
 596
 597         out_typescript_bindings = out_typescript_bindings + "\t\t}\n\n"
 598
 599         out_typescript_bindings += f"\t\texport function {struct_name}_new(impl: {struct_name}"
 600         for var in field_var_conversions:
 601             if isinstance(var, ConvInfo):
 602                 out_typescript_bindings += f", {var.arg_name}: {var.java_ty}"
 603             else:
 604                 out_typescript_bindings += f", {var[1]}: {var[0]}"
 605
 606         out_typescript_bindings += f"""): number {{
 607             throw new Error('unimplemented'); // TODO: bind to WASM
 608         }}
 609 """
 610
 611         out_typescript_bindings += '\n// OUT_TYPESCRIPT_BINDINGS :: MAP_TRAIT :: END\n\n\n'
 612
 613         # Now that we've written out our java code (and created java_meths), generate C
 614         out_c = "typedef struct " + struct_name + "_JCalls {\n"
 615         out_c = out_c + "\tatomic_size_t refcnt;\n"
 616         out_c = out_c + "\t// TODO: Object pointer o;\n"
 617         for var in field_var_conversions:
 618             if isinstance(var, ConvInfo):
 619                 # We're a regular ol' field
 620                 pass
 621             else:
 622                 # We're a supertrait
 623                 out_c = out_c + "\t" + var[0] + "_JCalls* " + var[1] + ";\n"
 624         for fn in field_function_lines:
 625             if fn.fn_name != "free" and fn.fn_name != "clone":
 626                 out_c = out_c + "\t// TODO: Some kind of method pointer " + fn.fn_name + "_meth;\n"
 627         out_c = out_c + "} " + struct_name + "_JCalls;\n"
 628
 629         for fn_line in field_function_lines:
 630             if fn_line.fn_name == "free":
 631                 out_c = out_c + "static void " + struct_name + "_JCalls_free(void* this_arg) {\n"
 632                 out_c = out_c + "\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n"
 633                 out_c = out_c + "\tif (atomic_fetch_sub_explicit(&j_calls->refcnt, 1, memory_order_acquire) == 1) {\n"
 634                 out_c = out_c + "\t\t// TODO: do any release required for j_calls->o (refcnt-- in java, but may be redundant)\n"
 635                 out_c = out_c + "\t\tFREE(j_calls);\n"
 636                 out_c = out_c + "\t}\n}\n"
 637
 638         for idx, fn_line in enumerate(field_function_lines):
 639             if fn_line.fn_name != "free" and fn_line.fn_name != "clone":
 640                 assert fn_line.ret_ty_info.ty_info.get_full_rust_ty()[1] == ""
 641                 out_c = out_c + fn_line.ret_ty_info.ty_info.get_full_rust_ty()[0] + " " + fn_line.fn_name + "_jcall("
 642                 if fn_line.self_is_const:
 643                     out_c = out_c + "const void* this_arg"
 644                 else:
 645                     out_c = out_c + "void* this_arg"
 646
 647                 for idx, arg in enumerate(fn_line.args_ty):
 648                     out_c = out_c + ", " + arg.ty_info.get_full_rust_ty()[0] + " " + arg.arg_name + arg.ty_info.get_full_rust_ty()[1]
 649
 650                 out_c = out_c + ") {\n"
 651                 out_c = out_c + "\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n"
 652
 653                 for arg_info in fn_line.args_ty:
 654                     if arg_info.ret_conv is not None:
 655                         out_c = out_c + "\t" + arg_info.ret_conv[0].replace('\n', '\n\t')
 656                         out_c = out_c + arg_info.arg_name
 657                         out_c = out_c + arg_info.ret_conv[1].replace('\n', '\n\t') + "\n"
 658
 659                 out_c = out_c + "\t//TODO: jobject obj = get object we can call against on j_calls->o\n"
 660                 if fn_line.ret_ty_info.c_ty.endswith("Array"):
 661                     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"
 662                 elif fn_line.ret_ty_info.java_ty == "void":
 663                     out_c = out_c + "\treturn; //TODO: Call " + fn_line.fn_name + " on j_calls with instance obj"
 664                 elif not fn_line.ret_ty_info.passed_as_ptr:
 665                     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
 666                 else:
 667                     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"
 668
 669                 for idx, arg_info in enumerate(fn_line.args_ty):
 670                     if arg_info.ret_conv is not None:
 671                         out_c = out_c + ", " + arg_info.ret_conv_name
 672                     else:
 673                         out_c = out_c + ", " + arg_info.arg_name
 674                 out_c = out_c + ");\n"
 675                 if fn_line.ret_ty_info.arg_conv is not None:
 676                     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"
 677
 678                 out_c = out_c + "}\n"
 679
 680         # Write out a clone function whether we need one or not, as we use them in moving to rust
 681         out_c = out_c + "static void* " + struct_name + "_JCalls_clone(const void* this_arg) {\n"
 682         out_c = out_c + "\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n"
 683         out_c = out_c + "\tatomic_fetch_add_explicit(&j_calls->refcnt, 1, memory_order_release);\n"
 684         for var in field_var_conversions:
 685             if not isinstance(var, ConvInfo):
 686                 out_c = out_c + "\tatomic_fetch_add_explicit(&j_calls->" + var[1] + "->refcnt, 1, memory_order_release);\n"
 687         out_c = out_c + "\treturn (void*) this_arg;\n"
 688         out_c = out_c + "}\n"
 689
 690         out_c = out_c + "static inline " + struct_name + " " + struct_name + "_init (" + self.c_fn_args_pfx + ", /*TODO: JS Object Reference */void* o"
 691         for var in field_var_conversions:
 692             if isinstance(var, ConvInfo):
 693                 out_c = out_c + ", " + var.c_ty + " " + var.arg_name
 694             else:
 695                 out_c = out_c + ", /*TODO: JS Object Reference */void* " + var[1]
 696         out_c = out_c + ") {\n"
 697
 698         out_c = out_c + "\t" + struct_name + "_JCalls *calls = MALLOC(sizeof(" + struct_name + "_JCalls), \"" + struct_name + "_JCalls\");\n"
 699         out_c = out_c + "\tatomic_init(&calls->refcnt, 1);\n"
 700         out_c = out_c + "\t//TODO: Assign calls->o from o\n"
 701
 702         for (fn_name, java_meth_descr) in java_meths:
 703             if fn_name != "free" and fn_name != "clone":
 704                 out_c = out_c + "\tcalls->" + fn_name + "_meth = (*env)->GetMethodID(env, c, \"" + fn_name + "\", \"" + java_meth_descr + "\");\n"
 705                 out_c = out_c + "\tCHECK(calls->" + fn_name + "_meth != NULL);\n"
 706
 707         for var in field_var_conversions:
 708             if isinstance(var, ConvInfo) and var.arg_conv is not None:
 709                 out_c = out_c + "\n\t" + var.arg_conv.replace("\n", "\n\t") +"\n"
 710         out_c = out_c + "\n\t" + struct_name + " ret = {\n"
 711         out_c = out_c + "\t\t.this_arg = (void*) calls,\n"
 712         for fn_line in field_function_lines:
 713             if fn_line.fn_name != "free" and fn_line.fn_name != "clone":
 714                 out_c = out_c + "\t\t." + fn_line.fn_name + " = " + fn_line.fn_name + "_jcall,\n"
 715             elif fn_line.fn_name == "free":
 716                 out_c = out_c + "\t\t.free = " + struct_name + "_JCalls_free,\n"
 717             else:
 718                 out_c = out_c + "\t\t.clone = " + struct_name + "_JCalls_clone,\n"
 719         for var in field_var_conversions:
 720             if isinstance(var, ConvInfo):
 721                 if var.arg_conv_name is not None:
 722                     out_c = out_c + "\t\t." + var.arg_name + " = " + var.arg_conv_name + ",\n"
 723                     out_c = out_c + "\t\t.set_" + var.arg_name + " = NULL,\n"
 724                 else:
 725                     out_c = out_c + "\t\t." + var.var_name + " = " + var.var_name + ",\n"
 726                     out_c = out_c + "\t\t.set_" + var.var_name + " = NULL,\n"
 727             else:
 728                 out_c = out_c + "\t\t." + var[1] + " = " + var[0] + "_init(NULL, " + var[1] + "),\n"
 729         out_c = out_c + "\t};\n"
 730         for var in field_var_conversions:
 731             if not isinstance(var, ConvInfo):
 732                 out_c = out_c + "\tcalls->" + var[1] + " = ret." + var[1] + ".this_arg;\n"
 733         out_c = out_c + "\treturn ret;\n"
 734         out_c = out_c + "}\n"
 735
 736         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"
 737         for var in field_var_conversions:
 738             if isinstance(var, ConvInfo):
 739                 out_c = out_c + ", " + var.c_ty + " " + var.arg_name
 740             else:
 741                 out_c = out_c + ", /*TODO: JS Object Reference */ void* " + var[1]
 742         out_c = out_c + ") {\n"
 743         out_c = out_c + "\t" + struct_name + " *res_ptr = MALLOC(sizeof(" + struct_name + "), \"" + struct_name + "\");\n"
 744         out_c = out_c + "\t*res_ptr = " + struct_name + "_init(NULL, o"
 745         for var in field_var_conversions:
 746             if isinstance(var, ConvInfo):
 747                 out_c = out_c + ", " + var.arg_name
 748             else:
 749                 out_c = out_c + ", " + var[1]
 750         out_c = out_c + ");\n"
 751         out_c = out_c + "\treturn (long)res_ptr;\n"
 752         out_c = out_c + "}\n"
 753
 754         return (out_typescript_bindings, out_typescript_human, out_c)
 755
 756     def trait_struct_inc_refcnt(self, ty_info):
 757         return ""
 758
 759     def map_complex_enum(self, struct_name, variant_list, camel_to_snake):
 760         java_hu_type = struct_name.replace("LDK", "")
 761
 762         out_java_enum = ""
 763         out_java = ""
 764         out_c = ""
 765
 766         out_java_enum += (self.hu_struct_file_prefix)
 767         out_java_enum += ("export default class " + java_hu_type + " extends CommonBase {\n")
 768         out_java_enum += ("\tprotected constructor(_dummy: object, ptr: number) { super(ptr); }\n")
 769         out_java_enum += ("\tprotected finalize() {\n")
 770         out_java_enum += ("\t\tsuper.finalize();\n")
 771         out_java_enum += ("\t\tif (this.ptr != 0) { bindings." + java_hu_type + "_free(this.ptr); }\n")
 772         out_java_enum += ("\t}\n")
 773         out_java_enum += f"\tstatic constr_from_ptr(ptr: number): {java_hu_type} {{\n"
 774         out_java_enum += (f"\t\tconst raw_val: bindings.{struct_name} = bindings." + struct_name + "_ref_from_ptr(ptr);\n")
 775         java_hu_subclasses = ""
 776
 777         out_java +=  ("\tpublic static class " + struct_name + " {\n")
 778         out_java +=  ("\t\tprivate " + struct_name + "() {}\n")
 779         for var in variant_list:
 780             out_java +=  ("\t\texport class " + var.var_name + " extends " + struct_name + " {\n")
 781             java_hu_subclasses = java_hu_subclasses + "export class " + var.var_name + " extends " + java_hu_type + " {\n"
 782             out_java_enum += ("\t\tif (raw_val instanceof bindings." + struct_name + "." + var.var_name + ") {\n")
 783             out_java_enum += ("\t\t\treturn new " + var.var_name + "(this.ptr, raw_val);\n")
 784             init_meth_params = ""
 785             init_meth_body = ""
 786             hu_conv_body = ""
 787             for idx, field_ty in enumerate(var.fields):
 788                 out_java += ("\t\t\tpublic " + field_ty.java_ty + " " + field_ty.arg_name + ";\n")
 789                 java_hu_subclasses = java_hu_subclasses + "\tpublic " + field_ty.arg_name + f": {field_ty.java_hu_ty};\n"
 790                 if field_ty.to_hu_conv is not None:
 791                     hu_conv_body = hu_conv_body + "\t\tconst " + field_ty.arg_name + f": {field_ty.java_ty} = obj." + field_ty.arg_name + ";\n"
 792                     hu_conv_body = hu_conv_body + "\t\t" + field_ty.to_hu_conv.replace("\n", "\n\t\t\t") + "\n"
 793                     hu_conv_body = hu_conv_body + "\t\tthis." + field_ty.arg_name + " = " + field_ty.to_hu_conv_name + ";\n"
 794                 else:
 795                     hu_conv_body = hu_conv_body + "\t\tthis." + field_ty.arg_name + " = obj." + field_ty.arg_name + ";\n"
 796                 if idx > 0:
 797                     init_meth_params = init_meth_params + ", "
 798                 init_meth_params = init_meth_params + field_ty.java_ty + " " + field_ty.arg_name
 799                 init_meth_body = init_meth_body + "this." + field_ty.arg_name + " = " + field_ty.arg_name + "; "
 800             out_java +=  ("\t\t\t" + var.var_name + "(" + init_meth_params + ") { ")
 801             out_java +=  (init_meth_body)
 802             out_java +=  ("}\n")
 803             out_java += ("\t\t}\n")
 804             out_java_enum += ("\t\t}\n")
 805             java_hu_subclasses = java_hu_subclasses + "\tprivate constructor(ptr: number, obj: bindings." + struct_name + "." + var.var_name + ") {\n\t\tsuper(null, ptr);\n"
 806             java_hu_subclasses = java_hu_subclasses + hu_conv_body
 807             java_hu_subclasses = java_hu_subclasses + "\t}\n}\n"
 808         out_java += ("\t\tstatic native void init();\n")
 809         out_java += ("\t}\n")
 810         out_java_enum += ("\t\tthrow new Error('oops, this should be unreachable'); // Unreachable without extending the (internal) bindings interface\n\t}\n\n")
 811         out_java += ("\tstatic { " + struct_name + ".init(); }\n")
 812         out_java += ("\tpublic static native " + struct_name + " " + struct_name + "_ref_from_ptr(long ptr);\n");
 813
 814         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")
 815         out_c += ("\t" + struct_name + " *obj = (" + struct_name + "*)ptr;\n")
 816         out_c += ("\tswitch(obj->tag) {\n")
 817         for var in variant_list:
 818             out_c += ("\t\tcase " + struct_name + "_" + var.var_name + ": {\n")
 819             c_params = []
 820             for idx, field_map in enumerate(var.fields):
 821                 if field_map.ret_conv is not None:
 822                     out_c += ("\t\t\t" + field_map.ret_conv[0].replace("\n", "\n\t\t\t"))
 823                     out_c += ("obj->" + camel_to_snake(var.var_name) + "." + field_map.arg_name)
 824                     out_c += (field_map.ret_conv[1].replace("\n", "\n\t\t\t") + "\n")
 825                     c_params.append(field_map.ret_conv_name)
 826                 else:
 827                     c_params.append("obj->" + camel_to_snake(var.var_name) + "." + field_map.arg_name)
 828             out_c += ("\t\t\treturn " + self.c_constr_native_complex_enum(struct_name, var.var_name, c_params) + ";\n")
 829             out_c += ("\t\t}\n")
 830         out_c += ("\t\tdefault: abort();\n")
 831         out_c += ("\t}\n}\n")
 832         out_java_enum += ("}\n")
 833         out_java_enum += (java_hu_subclasses)
 834         return (out_java, out_java_enum, out_c)
 835
 836     def map_opaque_struct(self, struct_name):
 837         implementations = ""
 838         method_header = ""
 839         if struct_name.startswith("LDKLocked"):
 840             implementations += "implements AutoCloseable "
 841             method_header = """
 842                 public close() {
 843 """
 844         else:
 845             method_header = """
 846                 protected finalize() {
 847                     super.finalize();
 848 """
 849
 850         out_opaque_struct_human = f"""
 851             {self.hu_struct_file_prefix}
 852
 853             export default class {struct_name.replace("LDK","")} extends CommonBase {implementations}{{
 854                 constructor(_dummy: object, ptr: number) {{
 855                     super(ptr);
 856                 }}
 857
 858                 {method_header}
 859                     if (this.ptr != 0) {{
 860                         bindings.{struct_name.replace("LDK","")}_free(this.ptr);
 861                     }}
 862                 }}
 863 """
 864         return out_opaque_struct_human
 865
 866     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):
 867         out_java = ""
 868         out_c = ""
 869         out_java_struct = None
 870
 871         out_java += ("\tpublic static native ")
 872         out_c += (self.c_fn_ty_pfx)
 873         out_c += (return_type_info.c_ty)
 874         out_java += (return_type_info.java_ty)
 875         if return_type_info.ret_conv is not None:
 876             ret_conv_pfx, ret_conv_sfx = return_type_info.ret_conv
 877         out_java += (" " + method_name + "(")
 878         out_c += (" " + self.c_fn_name_pfx + method_name.replace('_', '_1') + "(" + self.c_fn_args_pfx)
 879
 880         method_argument_string = ""
 881         native_call_argument_string = ""
 882         for idx, arg_conv_info in enumerate(argument_types):
 883             if idx != 0:
 884                 method_argument_string += (", ")
 885                 native_call_argument_string += ', '
 886             if arg_conv_info.c_ty != "void":
 887                 out_c += (", ")
 888             if arg_conv_info.c_ty != "void":
 889                 out_c += (arg_conv_info.c_ty + " " + arg_conv_info.arg_name)
 890                 needs_encoding = arg_conv_info.c_ty in self.wasm_encoding_map
 891                 native_argument = arg_conv_info.arg_name
 892                 if needs_encoding:
 893                     converter = self.wasm_encoding_map[arg_conv_info.c_ty]
 894                     native_argument = f"{converter}({arg_conv_info.arg_name})"
 895                 method_argument_string += f"{arg_conv_info.arg_name}: {arg_conv_info.java_ty}"
 896                 native_call_argument_string += native_argument
 897
 898         has_return_value = return_type_info.c_ty != 'void'
 899         needs_decoding = return_type_info.c_ty in self.wasm_decoding_map
 900         return_statement = 'return nativeResponseValue;'
 901         if not has_return_value:
 902             return_statement = '// debug statements here'
 903         elif needs_decoding:
 904             converter = self.wasm_decoding_map[return_type_info.c_ty]
 905             return_statement = f"return {converter}(nativeResponseValue);"
 906
 907         out_java = f"""\texport function {method_name}({method_argument_string}): {return_type_info.java_ty} {{
 908                 if(!isWasmInitialized) {{
 909                         throw new Error("initializeWasm() must be awaited first!");
 910                 }}
 911                 const nativeResponseValue = wasm.{method_name}({native_call_argument_string});
 912                 {return_statement}
 913         }}
 914 """
 915
 916         if has_out_java_struct:
 917             out_java_struct = ""
 918             if not args_known:
 919                 out_java_struct += ("\t// Skipped " + method_name + "\n")
 920                 has_out_java_struct = False
 921             else:
 922                 meth_n = method_name[len(struct_meth) + 1:]
 923                 if not takes_self:
 924                     out_java_struct += (
 925                             "\tpublic static " + return_type_info.java_hu_ty + " constructor_" + meth_n + "(")
 926                 else:
 927                     out_java_struct += ("\tpublic " + return_type_info.java_hu_ty + " " + meth_n + "(")
 928                 for idx, arg in enumerate(argument_types):
 929                     if idx != 0:
 930                         if not takes_self or idx > 1:
 931                             out_java_struct += (", ")
 932                     elif takes_self:
 933                         continue
 934                     if arg.java_ty != "void":
 935                         if arg.arg_name in default_constructor_args:
 936                             for explode_idx, explode_arg in enumerate(default_constructor_args[arg.arg_name]):
 937                                 if explode_idx != 0:
 938                                     out_java_struct += (", ")
 939                                 out_java_struct += (
 940                                         explode_arg.java_hu_ty + " " + arg.arg_name + "_" + explode_arg.arg_name)
 941                         else:
 942                             out_java_struct += (arg.java_hu_ty + " " + arg.arg_name)
 943
 944         out_c += (") {\n")
 945         if out_java_struct is not None:
 946             out_java_struct += (") {\n")
 947         for info in argument_types:
 948             if info.arg_conv is not None:
 949                 out_c += ("\t" + info.arg_conv.replace('\n', "\n\t") + "\n")
 950         if return_type_info.ret_conv is not None:
 951             out_c += ("\t" + ret_conv_pfx.replace('\n', '\n\t'))
 952         elif return_type_info.c_ty != "void":
 953             out_c += ("\t" + return_type_info.c_ty + " ret_val = ")
 954         else:
 955             out_c += ("\t")
 956         if c_call_string is None:
 957             out_c += (method_name + "(")
 958         else:
 959             out_c += (c_call_string)
 960         for idx, info in enumerate(argument_types):
 961             if info.arg_conv_name is not None:
 962                 if idx != 0:
 963                     out_c += (", ")
 964                 elif c_call_string is not None:
 965                     continue
 966                 out_c += (info.arg_conv_name)
 967         out_c += (")")
 968         if return_type_info.ret_conv is not None:
 969             out_c += (ret_conv_sfx.replace('\n', '\n\t'))
 970         else:
 971             out_c += (";")
 972         for info in argument_types:
 973             if info.arg_conv_cleanup is not None:
 974                 out_c += ("\n\t" + info.arg_conv_cleanup.replace("\n", "\n\t"))
 975         if return_type_info.ret_conv is not None:
 976             out_c += ("\n\treturn " + return_type_info.ret_conv_name + ";")
 977         elif return_type_info.c_ty != "void":
 978             out_c += ("\n\treturn ret_val;")
 979         out_c += ("\n}\n\n")
 980
 981         if has_out_java_struct:
 982             out_java_struct += ("\t\t")
 983             if return_type_info.java_ty != "void":
 984                 out_java_struct += (return_type_info.java_ty + " ret = ")
 985             out_java_struct += ("bindings." + method_name + "(")
 986             for idx, info in enumerate(argument_types):
 987                 if idx != 0:
 988                     out_java_struct += (", ")
 989                 if idx == 0 and takes_self:
 990                     out_java_struct += ("this.ptr")
 991                 elif info.arg_name in default_constructor_args:
 992                     out_java_struct += ("bindings." + info.java_hu_ty + "_new(")
 993                     for explode_idx, explode_arg in enumerate(default_constructor_args[info.arg_name]):
 994                         if explode_idx != 0:
 995                             out_java_struct += (", ")
 996                         expl_arg_name = info.arg_name + "_" + explode_arg.arg_name
 997                         if explode_arg.from_hu_conv is not None:
 998                             out_java_struct += (
 999                                 explode_arg.from_hu_conv[0].replace(explode_arg.arg_name, expl_arg_name))
1000                         else:
1001                             out_java_struct += (expl_arg_name)
1002                     out_java_struct += (")")
1003                 elif info.from_hu_conv is not None:
1004                     out_java_struct += (info.from_hu_conv[0])
1005                 else:
1006                     out_java_struct += (info.arg_name)
1007             out_java_struct += (");\n")
1008             if return_type_info.to_hu_conv is not None:
1009                 if not takes_self:
1010                     out_java_struct += ("\t\t" + return_type_info.to_hu_conv.replace("\n", "\n\t\t").replace("this",
1011                                                                                                              return_type_info.to_hu_conv_name) + "\n")
1012                 else:
1013                     out_java_struct += ("\t\t" + return_type_info.to_hu_conv.replace("\n", "\n\t\t") + "\n")
1014
1015             for idx, info in enumerate(argument_types):
1016                 if idx == 0 and takes_self:
1017                     pass
1018                 elif info.arg_name in default_constructor_args:
1019                     for explode_arg in default_constructor_args[info.arg_name]:
1020                         expl_arg_name = info.arg_name + "_" + explode_arg.arg_name
1021                         if explode_arg.from_hu_conv is not None and return_type_info.to_hu_conv_name:
1022                             out_java_struct += ("\t\t" + explode_arg.from_hu_conv[1].replace(explode_arg.arg_name,
1023                                                                                              expl_arg_name).replace(
1024                                 "this", return_type_info.to_hu_conv_name) + ";\n")
1025                 elif info.from_hu_conv is not None and info.from_hu_conv[1] != "":
1026                     if not takes_self and return_type_info.to_hu_conv_name is not None:
1027                         out_java_struct += (
1028                                 "\t\t" + info.from_hu_conv[1].replace("this", return_type_info.to_hu_conv_name) + ";\n")
1029                     else:
1030                         out_java_struct += ("\t\t" + info.from_hu_conv[1] + ";\n")
1031
1032             if return_type_info.to_hu_conv_name is not None:
1033                 out_java_struct += ("\t\treturn " + return_type_info.to_hu_conv_name + ";\n")
1034             elif return_type_info.java_ty != "void" and return_type_info.rust_obj != "LDK" + struct_meth:
1035                 out_java_struct += ("\t\treturn ret;\n")
1036             out_java_struct += ("\t}\n\n")
1037
1038         return (out_java, out_c, out_java_struct)