1 from bindingstypes import *
9 def __init__(self, DEBUG: bool, target: Target, **kwargs):
11 self.c_array_class_caches = set()
12 self.c_type_map = dict(
19 self.to_hu_conv_templates = dict(
20 ptr = '{human_type} {var_name}_hu_conv = new {human_type}(null, {var_name});',
21 default = '{human_type} {var_name}_hu_conv = new {human_type}(null, {var_name});'
24 self.bindings_header = """package org.ldk.impl;
25 import org.ldk.enums.*;
27 public class bindings {
28 public static class VecOrSliceDef {
32 public VecOrSliceDef(long dataptr, long datalen, long stride) {
33 this.dataptr = dataptr; this.datalen = datalen; this.stride = stride;
37 System.loadLibrary(\"lightningjni\");
38 init(java.lang.Enum.class, VecOrSliceDef.class);
40 if (!get_lib_version_string().equals(get_ldk_java_bindings_version()))
41 throw new IllegalArgumentException("Compiled LDK library and LDK class failes do not match");
42 // Fetching the LDK versions from C also checks that the header and binaries match
43 get_ldk_c_bindings_version();
46 static native void init(java.lang.Class c, java.lang.Class slicedef);
47 static native void init_class_cache();
48 static native String get_lib_version_string();
50 public static String get_ldk_java_bindings_version() {
51 return "<git_version_ldk_garbagecollected>";
53 public static native String get_ldk_c_bindings_version();
54 public static native String get_ldk_version();
56 public static native boolean deref_bool(long ptr);
57 public static native long deref_long(long ptr);
58 public static native void free_heap_ptr(long ptr);
59 public static native byte[] read_bytes(long ptr, long len);
60 public static native byte[] get_u8_slice_bytes(long slice_ptr);
61 public static native long bytes_to_u8_vec(byte[] bytes);
62 public static native long new_txpointer_copy_data(byte[] txdata);
63 public static native void txpointer_free(long ptr);
64 public static native byte[] txpointer_get_buffer(long ptr);
65 public static native long vec_slice_len(long vec);
66 public static native long new_empty_slice_vec();
70 self.bindings_footer = "}\n"
72 self.util_fn_pfx = """package org.ldk.structs;
73 import org.ldk.impl.bindings;
74 import java.util.Arrays;
75 import org.ldk.enums.*;
77 public class UtilMethods {
79 self.util_fn_sfx = "}"
80 self.common_base = """package org.ldk.structs;
81 import java.util.LinkedList;
84 LinkedList<Object> ptrs_to = new LinkedList();
85 protected CommonBase(long ptr) { this.ptr = ptr; }
89 self.c_file_pfx = """#include <jni.h>
90 // On OSX jlong (ie long long) is not equivalent to int64_t, so we override here
92 #include \"org_ldk_impl_bindings.h\"
93 #include <lightning.h>
95 #include <stdatomic.h>
100 if self.target == Target.ANDROID:
101 self.c_file_pfx = self.c_file_pfx + """
102 #include <android/log.h>
103 #define DEBUG_PRINT(...) __android_log_print(ANDROID_LOG_ERROR, "LDK", __VA_ARGS__)
107 static void* redirect_stderr(void* ignored) {
110 dup2(pipes[1], STDERR_FILENO);
112 memset(buf, 0, 8192);
114 while ((len = read(pipes[0], buf, 8191)) > 0) {
115 DEBUG_PRINT("%s\\n", buf);
116 memset(buf, 0, 8192);
118 DEBUG_PRINT("End of stderr???\\n");
121 void __attribute__((constructor)) spawn_stderr_redirection() {
123 pthread_create(&thread, NULL, &redirect_stderr, NULL);
127 self.c_file_pfx = self.c_file_pfx + "#define DEBUG_PRINT(...) fprintf(stderr, __VA_ARGS__)\n"
130 self.c_file_pfx = self.c_file_pfx + """#define MALLOC(a, _) malloc(a)
131 #define FREE(p) if ((uint64_t)(p) > 1024) { free(p); }
132 #define DO_ASSERT(a) (void)(a)
136 self.c_file_pfx = self.c_file_pfx + """#include <assert.h>
137 // Always run a, then assert it is true:
138 #define DO_ASSERT(a) do { bool _assert_val = (a); assert(_assert_val); } while(0)
139 // Assert a is true or do nothing
140 #define CHECK(a) DO_ASSERT(a)
142 void __attribute__((constructor)) debug_log_version() {
143 if (check_get_ldk_version() == NULL)
144 DEBUG_PRINT("LDK version did not match the header we built against\\n");
145 if (check_get_ldk_bindings_version() == NULL)
146 DEBUG_PRINT("LDK C Bindings version did not match the header we built against\\n");
147 DEBUG_PRINT("Loaded LDK-Java Bindings with LDK %s and LDK-C-Bindings %s\\n", check_get_ldk_version(), check_get_ldk_bindings_version());
150 // Running a leak check across all the allocations and frees of the JDK is a mess,
151 // so instead we implement our own naive leak checker here, relying on the -wrap
152 // linker option to wrap malloc/calloc/realloc/free, tracking everyhing allocated
153 // and free'd in Rust or C across the generated bindings shared library.
157 if self.target == Target.ANDROID:
158 self.c_file_pfx = self.c_file_pfx + """
162 // Implement the execinfo functions using _Unwind_backtrace. This seems to miss many Rust
163 // symbols, so we only use it on Android, where execinfo.h is unavailable.
165 struct BacktraceState {
169 static _Unwind_Reason_Code unwind_callback(struct _Unwind_Context* context, void* arg) {
170 struct BacktraceState* state = (struct BacktraceState*)arg;
171 uintptr_t pc = _Unwind_GetIP(context);
173 if (state->current == state->end) {
174 return _URC_END_OF_STACK;
176 *state->current++ = (void*)(pc);
179 return _URC_NO_REASON;
182 int backtrace(void** buffer, int max) {
183 struct BacktraceState state = { buffer, buffer + max };
184 _Unwind_Backtrace(unwind_callback, &state);
185 return state.current - buffer;
188 void backtrace_symbols_fd(void ** buffer, int count, int _fd) {
189 for (int idx = 0; idx < count; ++idx) {
191 if (dladdr(buffer[idx], &info) && info.dli_sname) {
192 DEBUG_PRINT("%p: %s", buffer[idx], info.dli_sname);
194 DEBUG_PRINT("%p: ???", buffer[idx]);
200 self.c_file_pfx = self.c_file_pfx + "#include <execinfo.h>\n"
201 self.c_file_pfx = self.c_file_pfx + """
203 static mtx_t allocation_mtx;
205 void __attribute__((constructor)) init_mtx() {
206 DO_ASSERT(mtx_init(&allocation_mtx, mtx_plain) == thrd_success);
210 typedef struct allocation {
211 struct allocation* next;
213 const char* struct_name;
216 unsigned long alloc_len;
218 static allocation* allocation_ll = NULL;
220 void* __real_malloc(size_t len);
221 void* __real_calloc(size_t nmemb, size_t len);
222 static void new_allocation(void* res, const char* struct_name, size_t len) {
223 allocation* new_alloc = __real_malloc(sizeof(allocation));
224 new_alloc->ptr = res;
225 new_alloc->struct_name = struct_name;
226 new_alloc->bt_len = backtrace(new_alloc->bt, BT_MAX);
227 new_alloc->alloc_len = len;
228 DO_ASSERT(mtx_lock(&allocation_mtx) == thrd_success);
229 new_alloc->next = allocation_ll;
230 allocation_ll = new_alloc;
231 DO_ASSERT(mtx_unlock(&allocation_mtx) == thrd_success);
233 static void* MALLOC(size_t len, const char* struct_name) {
234 void* res = __real_malloc(len);
235 new_allocation(res, struct_name, len);
238 void __real_free(void* ptr);
239 static void alloc_freed(void* ptr) {
240 allocation* p = NULL;
241 DO_ASSERT(mtx_lock(&allocation_mtx) == thrd_success);
242 allocation* it = allocation_ll;
243 while (it->ptr != ptr) {
244 p = it; it = it->next;
246 DEBUG_PRINT("Tried to free unknown pointer %p at:\\n", ptr);
248 int bt_len = backtrace(bt, BT_MAX);
249 backtrace_symbols_fd(bt, bt_len, STDERR_FILENO);
250 DEBUG_PRINT("\\n\\n");
251 DO_ASSERT(mtx_unlock(&allocation_mtx) == thrd_success);
252 return; // addrsan should catch malloc-unknown and print more info than we have
255 if (p) { p->next = it->next; } else { allocation_ll = it->next; }
256 DO_ASSERT(mtx_unlock(&allocation_mtx) == thrd_success);
257 DO_ASSERT(it->ptr == ptr);
260 static void FREE(void* ptr) {
261 if ((uint64_t)ptr < 1024) return; // Rust loves to create pointers to the NULL page for dummys
266 void* __wrap_malloc(size_t len) {
267 void* res = __real_malloc(len);
268 new_allocation(res, "malloc call", len);
271 void* __wrap_calloc(size_t nmemb, size_t len) {
272 void* res = __real_calloc(nmemb, len);
273 new_allocation(res, "calloc call", len);
276 void __wrap_free(void* ptr) {
277 if (ptr == NULL) return;
282 void* __real_realloc(void* ptr, size_t newlen);
283 void* __wrap_realloc(void* ptr, size_t len) {
284 if (ptr != NULL) alloc_freed(ptr);
285 void* res = __real_realloc(ptr, len);
286 new_allocation(res, "realloc call", len);
289 void __wrap_reallocarray(void* ptr, size_t new_sz) {
290 // Rust doesn't seem to use reallocarray currently
294 void __attribute__((destructor)) check_leaks() {
295 unsigned long alloc_count = 0;
296 unsigned long alloc_size = 0;
297 DEBUG_PRINT("The following LDK-allocated blocks still remain.\\n");
298 DEBUG_PRINT("Note that this is only accurate if System.gc(); System.runFinalization()\\n");
299 DEBUG_PRINT("was called prior to exit after all LDK objects were out of scope.\\n");
300 for (allocation* a = allocation_ll; a != NULL; a = a->next) {
301 DEBUG_PRINT("%s %p (%lu bytes) remains:\\n", a->struct_name, a->ptr, a->alloc_len);
302 backtrace_symbols_fd(a->bt, a->bt_len, STDERR_FILENO);
303 DEBUG_PRINT("\\n\\n");
305 alloc_size += a->alloc_len;
307 DEBUG_PRINT("%lu allocations remained for %lu bytes.\\n", alloc_count, alloc_size);
308 DEBUG_PRINT("Note that this is only accurate if System.gc(); System.runFinalization()\\n");
309 DEBUG_PRINT("was called prior to exit after all LDK objects were out of scope.\\n");
312 self.c_file_pfx = self.c_file_pfx + """
313 static jmethodID ordinal_meth = NULL;
314 static jmethodID slicedef_meth = NULL;
315 static jclass slicedef_cls = NULL;
316 JNIEXPORT void Java_org_ldk_impl_bindings_init(JNIEnv * env, jclass _b, jclass enum_class, jclass slicedef_class) {
317 ordinal_meth = (*env)->GetMethodID(env, enum_class, "ordinal", "()I");
318 CHECK(ordinal_meth != NULL);
319 slicedef_meth = (*env)->GetMethodID(env, slicedef_class, "<init>", "(JJJ)V");
320 CHECK(slicedef_meth != NULL);
321 slicedef_cls = (*env)->NewGlobalRef(env, slicedef_class);
322 CHECK(slicedef_cls != NULL);
325 JNIEXPORT jboolean JNICALL Java_org_ldk_impl_bindings_deref_1bool (JNIEnv * env, jclass _a, jlong ptr) {
326 return *((bool*)ptr);
328 JNIEXPORT jlong JNICALL Java_org_ldk_impl_bindings_deref_1long (JNIEnv * env, jclass _a, jlong ptr) {
329 return *((long*)ptr);
331 JNIEXPORT void JNICALL Java_org_ldk_impl_bindings_free_1heap_1ptr (JNIEnv * env, jclass _a, jlong ptr) {
334 JNIEXPORT jbyteArray JNICALL Java_org_ldk_impl_bindings_read_1bytes (JNIEnv * env, jclass _b, jlong ptr, jlong len) {
335 jbyteArray ret_arr = (*env)->NewByteArray(env, len);
336 (*env)->SetByteArrayRegion(env, ret_arr, 0, len, (unsigned char*)ptr);
339 JNIEXPORT jbyteArray JNICALL Java_org_ldk_impl_bindings_get_1u8_1slice_1bytes (JNIEnv * env, jclass _b, jlong slice_ptr) {
340 LDKu8slice *slice = (LDKu8slice*)slice_ptr;
341 jbyteArray ret_arr = (*env)->NewByteArray(env, slice->datalen);
342 (*env)->SetByteArrayRegion(env, ret_arr, 0, slice->datalen, slice->data);
345 JNIEXPORT int64_t impl_bindings_bytes_1to_1u8_1vec (JNIEnv * env, jclass _b, jbyteArray bytes) {
346 LDKCVec_u8Z *vec = (LDKCVec_u8Z*)MALLOC(sizeof(LDKCVec_u8Z), "LDKCVec_u8");
347 vec->datalen = (*env)->GetArrayLength(env, bytes);
348 vec->data = (uint8_t*)MALLOC(vec->datalen, "LDKCVec_u8Z Bytes");
349 (*env)->GetByteArrayRegion (env, bytes, 0, vec->datalen, vec->data);
350 return (uint64_t)vec;
352 JNIEXPORT jbyteArray JNICALL Java_org_ldk_impl_bindings_txpointer_1get_1buffer (JNIEnv * env, jclass _b, jlong ptr) {
353 LDKTransaction *txdata = (LDKTransaction*)ptr;
355 slice.data = txdata->data;
356 slice.datalen = txdata->datalen;
357 return Java_org_ldk_impl_bindings_get_1u8_1slice_1bytes(env, _b, (uint64_t)&slice);
359 JNIEXPORT int64_t JNICALL Java_org_ldk_impl_bindings_new_1txpointer_1copy_1data (JNIEnv * env, jclass _b, jbyteArray bytes) {
360 LDKTransaction *txdata = (LDKTransaction*)MALLOC(sizeof(LDKTransaction), "LDKTransaction");
361 txdata->datalen = (*env)->GetArrayLength(env, bytes);
362 txdata->data = (uint8_t*)MALLOC(txdata->datalen, "Tx Data Bytes");
363 txdata->data_is_owned = false;
364 (*env)->GetByteArrayRegion (env, bytes, 0, txdata->datalen, txdata->data);
365 return (uint64_t)txdata;
367 JNIEXPORT void JNICALL Java_org_ldk_impl_bindings_txpointer_1free (JNIEnv * env, jclass _b, jlong ptr) {
368 LDKTransaction *tx = (LDKTransaction*)ptr;
369 tx->data_is_owned = true;
370 Transaction_free(*tx);
373 JNIEXPORT jlong JNICALL Java_org_ldk_impl_bindings_vec_1slice_1len (JNIEnv * env, jclass _a, jlong ptr) {
374 // Check offsets of a few Vec types are all consistent as we're meant to be generic across types
375 _Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKCVec_SignatureZ, datalen), "Vec<*> needs to be mapped identically");
376 _Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKCVec_MessageSendEventZ, datalen), "Vec<*> needs to be mapped identically");
377 _Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKCVec_EventZ, datalen), "Vec<*> needs to be mapped identically");
378 _Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKCVec_C2Tuple_usizeTransactionZZ, datalen), "Vec<*> needs to be mapped identically");
379 LDKCVec_u8Z *vec = (LDKCVec_u8Z*)ptr;
380 return (uint64_t)vec->datalen;
382 JNIEXPORT int64_t JNICALL Java_org_ldk_impl_bindings_new_1empty_1slice_1vec (JNIEnv * env, jclass _b) {
383 // Check sizes of a few Vec types are all consistent as we're meant to be generic across types
384 _Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKCVec_SignatureZ), "Vec<*> needs to be mapped identically");
385 _Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKCVec_MessageSendEventZ), "Vec<*> needs to be mapped identically");
386 _Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKCVec_EventZ), "Vec<*> needs to be mapped identically");
387 _Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKCVec_C2Tuple_usizeTransactionZZ), "Vec<*> needs to be mapped identically");
388 LDKCVec_u8Z *vec = (LDKCVec_u8Z*)MALLOC(sizeof(LDKCVec_u8Z), "Empty LDKCVec");
391 return (uint64_t)vec;
394 // We assume that CVec_u8Z and u8slice are the same size and layout (and thus pointers to the two can be mixed)
395 _Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKu8slice), "Vec<u8> and [u8] need to have been mapped identically");
396 _Static_assert(offsetof(LDKCVec_u8Z, data) == offsetof(LDKu8slice, data), "Vec<u8> and [u8] need to have been mapped identically");
397 _Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKu8slice, datalen), "Vec<u8> and [u8] need to have been mapped identically");
399 _Static_assert(sizeof(jlong) == sizeof(int64_t), "We assume that j-types are the same as C types");
400 _Static_assert(sizeof(jbyte) == sizeof(char), "We assume that j-types are the same as C types");
401 _Static_assert(sizeof(void*) <= 8, "Pointers must fit into 64 bits");
403 typedef jlongArray int64_tArray;
404 typedef jbyteArray int8_tArray;
406 static inline jstring str_ref_to_java(JNIEnv *env, const char* chars, size_t len) {
407 // Sadly we need to create a temporary because Java can't accept a char* without a 0-terminator
408 char* conv_buf = MALLOC(len + 1, "str conv buf");
409 memcpy(conv_buf, chars, len);
411 jstring ret = (*env)->NewStringUTF(env, conv_buf);
415 static inline LDKStr java_to_owned_str(JNIEnv *env, jstring str) {
416 uint64_t str_len = (*env)->GetStringUTFLength(env, str);
417 char* newchars = MALLOC(str_len + 1, "String chars");
418 const char* jchars = (*env)->GetStringUTFChars(env, str, NULL);
419 memcpy(newchars, jchars, str_len);
420 newchars[str_len] = 0;
421 (*env)->ReleaseStringUTFChars(env, str, jchars);
425 .chars_is_owned = true
430 JNIEXPORT jstring JNICALL Java_org_ldk_impl_bindings_get_1lib_1version_1string(JNIEnv *env, jclass _c) {
431 return str_ref_to_java(env, "<git_version_ldk_garbagecollected>", strlen("<git_version_ldk_garbagecollected>"));
433 JNIEXPORT jstring JNICALL Java_org_ldk_impl_bindings_get_1ldk_1c_1bindings_1version(JNIEnv *env, jclass _c) {
434 return str_ref_to_java(env, check_get_ldk_bindings_version(), strlen(check_get_ldk_bindings_version()));
436 JNIEXPORT jstring JNICALL Java_org_ldk_impl_bindings_get_1ldk_1version(JNIEnv *env, jclass _c) {
437 return str_ref_to_java(env, check_get_ldk_version(), strlen(check_get_ldk_version()));
441 self.hu_struct_file_prefix = """package org.ldk.structs;
443 import org.ldk.impl.bindings;
444 import org.ldk.enums.*;
445 import org.ldk.util.*;
446 import java.util.Arrays;
449 self.c_fn_ty_pfx = "JNIEXPORT "
450 self.c_fn_args_pfx = "JNIEnv *env, jclass clz"
451 self.file_ext = ".java"
452 self.ptr_c_ty = "int64_t"
453 self.ptr_native_ty = "long"
454 self.result_c_ty = "jclass"
455 self.ptr_arr = "jobjectArray"
456 self.get_native_arr_len_call = ("(*env)->GetArrayLength(env, ", ")")
458 def construct_jenv(self):
459 res = "JNIEnv *env;\n"
460 res += "jint get_jenv_res = (*j_calls->vm)->GetEnv(j_calls->vm, (void**)&env, JNI_VERSION_1_6);\n"
461 res += "if (get_jenv_res == JNI_EDETACHED) {\n"
462 if self.target == Target.ANDROID:
463 res += "\tDO_ASSERT((*j_calls->vm)->AttachCurrentThread(j_calls->vm, &env, NULL) == JNI_OK);\n"
465 res += "\tDO_ASSERT((*j_calls->vm)->AttachCurrentThread(j_calls->vm, (void**)&env, NULL) == JNI_OK);\n"
467 res += "\tDO_ASSERT(get_jenv_res == JNI_OK);\n"
470 def deconstruct_jenv(self):
471 res = "if (get_jenv_res == JNI_EDETACHED) {\n"
472 res += "\tDO_ASSERT((*j_calls->vm)->DetachCurrentThread(j_calls->vm) == JNI_OK);\n"
476 def release_native_arr_ptr_call(self, ty_info, arr_var, arr_ptr_var):
477 if ty_info.subty is None or not ty_info.subty.c_ty.endswith("Array"):
478 return "(*env)->ReleasePrimitiveArrayCritical(env, " + arr_var + ", " + arr_ptr_var + ", 0)"
480 def create_native_arr_call(self, arr_len, ty_info):
481 if ty_info.c_ty == "int8_tArray":
482 return "(*env)->NewByteArray(env, " + arr_len + ")"
483 elif ty_info.subty.c_ty.endswith("Array"):
484 clz_var = ty_info.java_fn_ty_arg[1:].replace("[", "arr_of_")
485 self.c_array_class_caches.add(clz_var)
486 return "(*env)->NewObjectArray(env, " + arr_len + ", " + clz_var + "_clz, NULL);\n"
488 return "(*env)->New" + ty_info.java_ty.strip("[]").title() + "Array(env, " + arr_len + ")"
489 def set_native_arr_contents(self, arr_name, arr_len, ty_info):
490 if ty_info.c_ty == "int8_tArray":
491 return ("(*env)->SetByteArrayRegion(env, " + arr_name + ", 0, " + arr_len + ", ", ")")
494 def get_native_arr_contents(self, arr_name, dest_name, arr_len, ty_info, copy):
495 if ty_info.c_ty == "int8_tArray":
497 return "(*env)->GetByteArrayRegion(env, " + arr_name + ", 0, " + arr_len + ", " + dest_name + ")"
499 return "(*env)->GetByteArrayElements (env, " + arr_name + ", NULL)"
500 elif not ty_info.java_ty[:len(ty_info.java_ty) - 2].endswith("[]"):
501 return "(*env)->Get" + ty_info.subty.java_ty.title() + "ArrayElements (env, " + arr_name + ", NULL)"
504 def get_native_arr_elem(self, arr_name, idxc, ty_info):
505 if self.get_native_arr_contents(arr_name, "", "", ty_info, False) is None:
506 return "(*env)->GetObjectArrayElement(env, " + arr_name + ", " + idxc + ")"
508 assert False # Only called if above is None
509 def get_native_arr_ptr_call(self, ty_info):
510 if ty_info.subty is not None and ty_info.subty.c_ty.endswith("Array"):
512 return ("(*env)->GetPrimitiveArrayCritical(env, ", ", NULL)")
513 def get_native_arr_entry_call(self, ty_info, arr_name, idxc, entry_access):
514 if ty_info.subty is None or not ty_info.subty.c_ty.endswith("Array"):
516 return "(*env)->SetObjectArrayElement(env, " + arr_name + ", " + idxc + ", " + entry_access + ")"
517 def cleanup_native_arr_ref_contents(self, arr_name, dest_name, arr_len, ty_info):
518 if ty_info.c_ty == "int8_tArray":
519 return "(*env)->ReleaseByteArrayElements(env, " + arr_name + ", (int8_t*)" + dest_name + ", 0);"
521 return "(*env)->Release" + ty_info.java_ty.strip("[]").title() + "ArrayElements(env, " + arr_name + ", " + dest_name + ", 0)"
523 def str_ref_to_native_call(self, var_name, str_len):
524 return "str_ref_to_java(env, " + var_name + ", " + str_len + ")"
525 def str_ref_to_c_call(self, var_name):
526 return "java_to_owned_str(env, " + var_name + ")"
528 def c_fn_name_define_pfx(self, fn_name, has_args):
530 return "JNICALL Java_org_ldk_impl_bindings_" + fn_name.replace("_", "_1") + "(JNIEnv *env, jclass clz, "
531 return "JNICALL Java_org_ldk_impl_bindings_" + fn_name.replace("_", "_1") + "(JNIEnv *env, jclass clz"
535 for ty in sorted(self.c_array_class_caches):
536 res = res + "static jclass " + ty + "_clz = NULL;\n"
537 res = res + "JNIEXPORT void Java_org_ldk_impl_bindings_init_1class_1cache(JNIEnv * env, jclass clz) {\n"
538 for ty in sorted(self.c_array_class_caches):
539 res = res + "\t" + ty + "_clz = (*env)->FindClass(env, \"" + ty.replace("arr_of_", "[") + "\");\n"
540 res = res + "\tCHECK(" + ty + "_clz != NULL);\n"
541 res = res + "\t" + ty + "_clz = (*env)->NewGlobalRef(env, " + ty + "_clz);\n"
545 def native_c_unitary_enum_map(self, struct_name, variants, enum_doc_comment):
546 out_java_enum = "package org.ldk.enums;\n\n"
549 out_c = out_c + "static inline LDK" + struct_name + " LDK" + struct_name + "_from_java(" + self.c_fn_args_pfx + ") {\n"
550 out_c = out_c + "\tswitch ((*env)->CallIntMethod(env, clz, ordinal_meth)) {\n"
552 if enum_doc_comment is not None:
553 out_java_enum += "/**\n * " + enum_doc_comment.replace("\n", "\n * ") + "\n */\n"
554 out_java_enum += "public enum " + struct_name + " {\n"
557 out_java_enum = out_java_enum + "\t" + var + ",\n"
558 out_c = out_c + "\t\tcase %d: return %s;\n" % (ord_v, var)
560 out_java_enum = out_java_enum + "\t; static native void init();\n"
561 out_java_enum = out_java_enum + "\tstatic { init(); }\n"
562 out_java_enum = out_java_enum + "}"
563 out_java = out_java + "\tstatic { " + struct_name + ".values(); /* Force enum statics to run */ }\n"
564 out_c = out_c + "\t}\n"
565 out_c = out_c + "\tabort();\n"
566 out_c = out_c + "}\n"
568 out_c = out_c + "static jclass " + struct_name + "_class = NULL;\n"
570 out_c = out_c + "static jfieldID " + struct_name + "_" + var + " = NULL;\n"
571 out_c = out_c + self.c_fn_ty_pfx + "void JNICALL Java_org_ldk_enums_" + struct_name.replace("_", "_1") + "_init (" + self.c_fn_args_pfx + ") {\n"
572 out_c = out_c + "\t" + struct_name + "_class = (*env)->NewGlobalRef(env, clz);\n"
573 out_c = out_c + "\tCHECK(" + struct_name + "_class != NULL);\n"
575 out_c = out_c + "\t" + struct_name + "_" + var + " = (*env)->GetStaticFieldID(env, " + struct_name + "_class, \"" + var + "\", \"Lorg/ldk/enums/" + struct_name + ";\");\n"
576 out_c = out_c + "\tCHECK(" + struct_name + "_" + var + " != NULL);\n"
577 out_c = out_c + "}\n"
578 out_c = out_c + "static inline jclass LDK" + struct_name + "_to_java(JNIEnv *env, LDK" + struct_name + " val) {\n"
579 out_c = out_c + "\tswitch (val) {\n"
582 out_c = out_c + "\t\tcase " + var + ":\n"
583 out_c = out_c + "\t\t\treturn (*env)->GetStaticObjectField(env, " + struct_name + "_class, " + struct_name + "_" + var + ");\n"
585 out_c = out_c + "\t\tdefault: abort();\n"
586 out_c = out_c + "\t}\n"
587 out_c = out_c + "}\n\n"
589 return (out_c, out_java_enum, out_java)
591 def c_unitary_enum_to_native_call(self, ty_info):
592 return (ty_info.rust_obj + "_to_java(env, ", ")")
593 def native_unitary_enum_to_c_call(self, ty_info):
594 return (ty_info.rust_obj + "_from_java(env, ", ")")
596 def c_complex_enum_pfx(self, struct_name, variants, init_meth_jty_strs):
599 out_c = out_c + "static jclass " + struct_name + "_" + var + "_class = NULL;\n"
600 out_c = out_c + "static jmethodID " + struct_name + "_" + var + "_meth = NULL;\n"
601 out_c = out_c + self.c_fn_ty_pfx + "void JNICALL Java_org_ldk_impl_bindings_00024" + struct_name.replace("_", "_1") + "_init (" + self.c_fn_args_pfx + ") {\n"
602 for var_name in variants:
603 out_c = out_c + "\t" + struct_name + "_" + var_name + "_class =\n"
604 if self.target == Target.ANDROID:
605 out_c = out_c + "\t\t(*env)->NewGlobalRef(env, (*env)->FindClass(env, \"org/ldk/impl/bindings$" + struct_name + "$" + var_name + "\"));\n"
607 out_c = out_c + "\t\t(*env)->NewGlobalRef(env, (*env)->FindClass(env, \"Lorg/ldk/impl/bindings$" + struct_name + "$" + var_name + ";\"));\n"
608 out_c = out_c + "\tCHECK(" + struct_name + "_" + var_name + "_class != NULL);\n"
609 out_c = out_c + "\t" + struct_name + "_" + var_name + "_meth = (*env)->GetMethodID(env, " + struct_name + "_" + var_name + "_class, \"<init>\", \"(" + init_meth_jty_strs[var_name] + ")V\");\n"
610 out_c = out_c + "\tCHECK(" + struct_name + "_" + var_name + "_meth != NULL);\n"
611 out_c = out_c + "}\n"
614 def c_complex_enum_pass_ty(self, struct_name):
617 def c_constr_native_complex_enum(self, struct_name, variant, c_params):
618 ret = "(*env)->NewObject(env, " + struct_name + "_" + variant + "_class, " + struct_name + "_" + variant + "_meth"
619 for param in c_params:
620 ret = ret + ", " + param
623 def native_c_map_trait(self, struct_name, field_vars, flattened_field_vars, field_fns, trait_doc_comment):
627 # First generate most of the Java code, note that we need information about java method argument strings for C
628 out_java_trait = out_java_trait + self.hu_struct_file_prefix
629 if trait_doc_comment is not None:
630 out_java_trait += "/**\n * " + trait_doc_comment.replace("\n", "\n * ") + "\n */\n"
631 out_java_trait += "@SuppressWarnings(\"unchecked\") // We correctly assign various generic arrays\n"
632 out_java_trait = out_java_trait + "public class " + struct_name.replace("LDK","") + " extends CommonBase {\n"
633 out_java_trait = out_java_trait + "\tfinal bindings." + struct_name + " bindings_instance;\n"
634 out_java_trait = out_java_trait + "\t" + struct_name.replace("LDK", "") + "(Object _dummy, long ptr) { super(ptr); bindings_instance = null; }\n"
635 out_java_trait = out_java_trait + "\tprivate " + struct_name.replace("LDK", "") + "(bindings." + struct_name + " arg"
636 for var in flattened_field_vars:
637 if isinstance(var, ConvInfo):
638 out_java_trait = out_java_trait + ", " + var.java_hu_ty + " " + var.arg_name
640 out_java_trait = out_java_trait + ", bindings." + var[0] + " " + var[1]
641 out_java_trait = out_java_trait + ") {\n"
642 out_java_trait = out_java_trait + "\t\tsuper(bindings." + struct_name + "_new(arg"
643 for var in flattened_field_vars:
644 if isinstance(var, ConvInfo):
645 if var.from_hu_conv is not None:
646 out_java_trait = out_java_trait + ", " + var.from_hu_conv[0]
648 out_java_trait = out_java_trait + ", " + var.arg_name
650 out_java_trait = out_java_trait + ", " + var[1]
651 out_java_trait = out_java_trait + "));\n"
652 out_java_trait = out_java_trait + "\t\tthis.ptrs_to.add(arg);\n"
653 for var in flattened_field_vars:
654 if isinstance(var, ConvInfo):
655 if var.from_hu_conv is not None and var.from_hu_conv[1] != "":
656 out_java_trait = out_java_trait + "\t\t" + var.from_hu_conv[1].replace("\n", "\n\t\t") + ";\n"
658 out_java_trait = out_java_trait + "\t\tthis.ptrs_to.add(" + var[1] + ");\n"
659 out_java_trait = out_java_trait + "\t\tthis.bindings_instance = arg;\n"
660 out_java_trait = out_java_trait + "\t}\n"
661 out_java_trait = out_java_trait + "\t@Override @SuppressWarnings(\"deprecation\")\n"
662 out_java_trait = out_java_trait + "\tprotected void finalize() throws Throwable {\n"
663 out_java_trait = out_java_trait + "\t\tif (ptr != 0) { bindings." + struct_name.replace("LDK","") + "_free(ptr); } super.finalize();\n"
664 out_java_trait = out_java_trait + "\t}\n\n"
666 java_trait_constr = "\tprivate static class " + struct_name + "Holder { " + struct_name.replace("LDK", "") + " held; }\n"
667 java_trait_constr = java_trait_constr + "\tpublic static " + struct_name.replace("LDK", "") + " new_impl(" + struct_name.replace("LDK", "") + "Interface arg"
668 for var in flattened_field_vars:
669 if isinstance(var, ConvInfo):
670 java_trait_constr = java_trait_constr + ", " + var.java_hu_ty + " " + var.arg_name
672 # Ideally we'd be able to take any instance of the interface, but our C code can only represent
673 # Java-implemented version, so we require users pass a Java implementation here :/
674 java_trait_constr = java_trait_constr + ", " + var[0].replace("LDK", "") + "." + var[0].replace("LDK", "") + "Interface " + var[1] + "_impl"
675 java_trait_constr = java_trait_constr + ") {\n\t\tfinal " + struct_name + "Holder impl_holder = new " + struct_name + "Holder();\n"
676 java_trait_constr = java_trait_constr + "\t\timpl_holder.held = new " + struct_name.replace("LDK", "") + "(new bindings." + struct_name + "() {\n"
677 out_java_trait = out_java_trait + "\tpublic static interface " + struct_name.replace("LDK", "") + "Interface {\n"
678 out_java = out_java + "\tpublic interface " + struct_name + " {\n"
680 for fn_line in field_fns:
681 java_meth_descr = "("
682 if fn_line.fn_name != "free" and fn_line.fn_name != "clone":
683 out_java = out_java + "\t\t " + fn_line.ret_ty_info.java_ty + " " + fn_line.fn_name + "("
684 java_trait_constr = java_trait_constr + "\t\t\t@Override public " + fn_line.ret_ty_info.java_ty + " " + fn_line.fn_name + "("
685 out_java_trait += "\t\t/**\n\t\t * " + fn_line.docs.replace("\n", "\n\t\t * ") + "\n\t\t */\n"
686 out_java_trait = out_java_trait + "\t\t" + fn_line.ret_ty_info.java_hu_ty + " " + fn_line.fn_name + "("
688 for idx, arg_conv_info in enumerate(fn_line.args_ty):
690 out_java = out_java + ", "
691 java_trait_constr = java_trait_constr + ", "
692 out_java_trait = out_java_trait + ", "
693 out_java = out_java + arg_conv_info.java_ty + " " + arg_conv_info.arg_name
694 out_java_trait = out_java_trait + arg_conv_info.java_hu_ty + " " + arg_conv_info.arg_name
695 java_trait_constr = java_trait_constr + arg_conv_info.java_ty + " " + arg_conv_info.arg_name
696 java_meth_descr = java_meth_descr + arg_conv_info.java_fn_ty_arg
697 java_meth_descr = java_meth_descr + ")" + fn_line.ret_ty_info.java_fn_ty_arg
698 java_meths.append((fn_line.fn_name, java_meth_descr))
700 out_java = out_java + ");\n"
701 out_java_trait = out_java_trait + ");\n"
702 java_trait_constr = java_trait_constr + ") {\n"
704 for arg_info in fn_line.args_ty:
705 if arg_info.to_hu_conv is not None:
706 java_trait_constr = java_trait_constr + "\t\t\t\t" + arg_info.to_hu_conv.replace("\n", "\n\t\t\t\t") + "\n"
708 if fn_line.ret_ty_info.java_ty != "void":
709 java_trait_constr = java_trait_constr + "\t\t\t\t" + fn_line.ret_ty_info.java_hu_ty + " ret = arg." + fn_line.fn_name + "("
711 java_trait_constr = java_trait_constr + "\t\t\t\targ." + fn_line.fn_name + "("
713 for idx, arg_info in enumerate(fn_line.args_ty):
715 java_trait_constr = java_trait_constr + ", "
716 if arg_info.to_hu_conv_name is not None:
717 java_trait_constr = java_trait_constr + arg_info.to_hu_conv_name
719 java_trait_constr = java_trait_constr + arg_info.arg_name
721 java_trait_constr = java_trait_constr + ");\n"
722 if fn_line.ret_ty_info.java_ty != "void":
723 if fn_line.ret_ty_info.from_hu_conv is not None:
724 java_trait_constr = java_trait_constr + "\t\t\t\t" + fn_line.ret_ty_info.java_ty + " result = " + fn_line.ret_ty_info.from_hu_conv[0] + ";\n"
725 if fn_line.ret_ty_info.from_hu_conv[1] != "":
726 java_trait_constr = java_trait_constr + "\t\t\t\t" + fn_line.ret_ty_info.from_hu_conv[1].replace("this", "impl_holder.held") + ";\n"
727 #if fn_line.ret_ty_info.rust_obj in result_types:
728 java_trait_constr = java_trait_constr + "\t\t\t\treturn result;\n"
730 java_trait_constr = java_trait_constr + "\t\t\t\treturn ret;\n"
731 java_trait_constr = java_trait_constr + "\t\t\t}\n"
732 java_trait_constr = java_trait_constr + "\t\t}"
733 for var in field_vars:
734 if isinstance(var, ConvInfo):
735 java_trait_constr = java_trait_constr + ", " + var.arg_name
737 java_trait_constr += ", " + var[1] + ".new_impl(" + var[1] + "_impl"
738 for suparg in var[2]:
739 if isinstance(suparg, ConvInfo):
740 java_trait_constr += ", " + suparg.arg_name
742 java_trait_constr += ", " + suparg[1]
743 java_trait_constr += ").bindings_instance"
744 for suparg in var[2]:
745 if isinstance(suparg, ConvInfo):
746 java_trait_constr += ", " + suparg.arg_name
748 java_trait_constr += ", " + suparg[1]
749 out_java_trait = out_java_trait + "\t}\n"
750 out_java_trait = out_java_trait + java_trait_constr + ");\n\t\treturn impl_holder.held;\n\t}\n"
752 out_java = out_java + "\t}\n"
754 out_java = out_java + "\tpublic static native long " + struct_name + "_new(" + struct_name + " impl"
755 for var in flattened_field_vars:
756 if isinstance(var, ConvInfo):
757 out_java = out_java + ", " + var.java_ty + " " + var.arg_name
759 out_java = out_java + ", " + var[0] + " " + var[1]
760 out_java = out_java + ");\n"
762 # Now that we've written out our java code (and created java_meths), generate C
763 out_c = "typedef struct " + struct_name + "_JCalls {\n"
764 out_c = out_c + "\tatomic_size_t refcnt;\n"
765 out_c = out_c + "\tJavaVM *vm;\n"
766 out_c = out_c + "\tjweak o;\n"
767 for var in flattened_field_vars:
768 if isinstance(var, ConvInfo):
769 # We're a regular ol' field
773 out_c = out_c + "\t" + var[0] + "_JCalls* " + var[1] + ";\n"
775 if fn.fn_name != "free" and fn.fn_name != "clone":
776 out_c = out_c + "\tjmethodID " + fn.fn_name + "_meth;\n"
777 out_c = out_c + "} " + struct_name + "_JCalls;\n"
779 for fn_line in field_fns:
780 if fn_line.fn_name == "free":
781 out_c = out_c + "static void " + struct_name + "_JCalls_free(void* this_arg) {\n"
782 out_c = out_c + "\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n"
783 out_c = out_c + "\tif (atomic_fetch_sub_explicit(&j_calls->refcnt, 1, memory_order_acquire) == 1) {\n"
784 out_c += "\t\t" + self.construct_jenv().replace("\n", "\n\t\t").strip() + "\n"
785 out_c = out_c + "\t\t(*env)->DeleteWeakGlobalRef(env, j_calls->o);\n"
786 out_c += "\t\t" + self.deconstruct_jenv().replace("\n", "\n\t\t").strip() + "\n"
787 out_c = out_c + "\t\tFREE(j_calls);\n"
788 out_c = out_c + "\t}\n}\n"
790 for idx, fn_line in enumerate(field_fns):
791 if fn_line.fn_name != "free" and fn_line.fn_name != "clone":
792 assert fn_line.ret_ty_info.ty_info.get_full_rust_ty()[1] == ""
793 out_c = out_c + fn_line.ret_ty_info.ty_info.get_full_rust_ty()[0] + " " + fn_line.fn_name + "_" + struct_name + "_jcall("
794 if fn_line.self_is_const:
795 out_c = out_c + "const void* this_arg"
797 out_c = out_c + "void* this_arg"
799 for idx, arg in enumerate(fn_line.args_ty):
800 out_c = out_c + ", " + arg.ty_info.get_full_rust_ty()[0] + " " + arg.arg_name + arg.ty_info.get_full_rust_ty()[1]
802 out_c = out_c + ") {\n"
803 out_c = out_c + "\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n"
804 out_c += "\t" + self.construct_jenv().replace("\n", "\n\t").strip() + "\n"
806 for arg_info in fn_line.args_ty:
807 if arg_info.ret_conv is not None:
808 out_c = out_c + "\t" + arg_info.ret_conv[0].replace('\n', '\n\t')
809 out_c = out_c + arg_info.arg_name
810 out_c = out_c + arg_info.ret_conv[1].replace('\n', '\n\t') + "\n"
812 out_c = out_c + "\tjobject obj = (*env)->NewLocalRef(env, j_calls->o);\n\tCHECK(obj != NULL);\n"
813 if fn_line.ret_ty_info.c_ty.endswith("Array"):
814 out_c = out_c + "\t" + fn_line.ret_ty_info.c_ty + " ret = (*env)->CallObjectMethod(env, obj, j_calls->" + fn_line.fn_name + "_meth"
815 elif fn_line.ret_ty_info.c_ty == "void":
816 out_c += "\t(*env)->Call" + fn_line.ret_ty_info.java_ty.title() + "Method(env, obj, j_calls->" + fn_line.fn_name + "_meth"
817 elif not fn_line.ret_ty_info.passed_as_ptr:
818 out_c += "\t" + fn_line.ret_ty_info.c_ty + " ret = (*env)->Call" + fn_line.ret_ty_info.java_ty.title() + "Method(env, obj, j_calls->" + fn_line.fn_name + "_meth"
820 out_c = out_c + "\t" + fn_line.ret_ty_info.rust_obj + "* ret = (" + fn_line.ret_ty_info.rust_obj + "*)(*env)->CallLongMethod(env, obj, j_calls->" + fn_line.fn_name + "_meth"
822 for idx, arg_info in enumerate(fn_line.args_ty):
823 if arg_info.ret_conv is not None:
824 out_c = out_c + ", " + arg_info.ret_conv_name
826 out_c = out_c + ", " + arg_info.arg_name
827 out_c = out_c + ");\n"
828 if fn_line.ret_ty_info.arg_conv is not None:
829 out_c += "\t" + fn_line.ret_ty_info.arg_conv.replace("\n", "\n\t") + "\n"
830 out_c += "\t" + self.deconstruct_jenv().replace("\n", "\n\t").strip() + "\n"
831 out_c += "\treturn " + fn_line.ret_ty_info.arg_conv_name + ";\n"
833 out_c += "\t" + self.deconstruct_jenv().replace("\n", "\n\t").strip() + "\n"
834 if not fn_line.ret_ty_info.passed_as_ptr and fn_line.ret_ty_info.c_ty != "void":
835 out_c += "\treturn ret;\n"
837 out_c = out_c + "}\n"
839 # Write out a clone function whether we need one or not, as we use them in moving to rust
840 out_c = out_c + "static void* " + struct_name + "_JCalls_clone(const void* this_arg) {\n"
841 out_c = out_c + "\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n"
842 out_c = out_c + "\tatomic_fetch_add_explicit(&j_calls->refcnt, 1, memory_order_release);\n"
843 for var in field_vars:
844 if not isinstance(var, ConvInfo):
845 out_c = out_c + "\tatomic_fetch_add_explicit(&j_calls->" + var[1] + "->refcnt, 1, memory_order_release);\n"
846 out_c = out_c + "\treturn (void*) this_arg;\n"
847 out_c = out_c + "}\n"
849 out_c = out_c + "static inline " + struct_name + " " + struct_name + "_init (" + self.c_fn_args_pfx + ", jobject o"
850 for var in flattened_field_vars:
851 if isinstance(var, ConvInfo):
852 out_c = out_c + ", " + var.c_ty + " " + var.arg_name
854 out_c = out_c + ", jobject " + var[1]
855 out_c = out_c + ") {\n"
857 out_c = out_c + "\tjclass c = (*env)->GetObjectClass(env, o);\n"
858 out_c = out_c + "\tCHECK(c != NULL);\n"
859 out_c = out_c + "\t" + struct_name + "_JCalls *calls = MALLOC(sizeof(" + struct_name + "_JCalls), \"" + struct_name + "_JCalls\");\n"
860 out_c = out_c + "\tatomic_init(&calls->refcnt, 1);\n"
861 out_c = out_c + "\tDO_ASSERT((*env)->GetJavaVM(env, &calls->vm) == 0);\n"
862 out_c = out_c + "\tcalls->o = (*env)->NewWeakGlobalRef(env, o);\n"
864 for (fn_name, java_meth_descr) in java_meths:
865 if fn_name != "free" and fn_name != "clone":
866 out_c = out_c + "\tcalls->" + fn_name + "_meth = (*env)->GetMethodID(env, c, \"" + fn_name + "\", \"" + java_meth_descr + "\");\n"
867 out_c = out_c + "\tCHECK(calls->" + fn_name + "_meth != NULL);\n"
869 for var in flattened_field_vars:
870 if isinstance(var, ConvInfo) and var.arg_conv is not None:
871 out_c = out_c + "\n\t" + var.arg_conv.replace("\n", "\n\t") +"\n"
872 out_c = out_c + "\n\t" + struct_name + " ret = {\n"
873 out_c = out_c + "\t\t.this_arg = (void*) calls,\n"
874 for fn_line in field_fns:
875 if fn_line.fn_name != "free" and fn_line.fn_name != "clone":
876 out_c = out_c + "\t\t." + fn_line.fn_name + " = " + fn_line.fn_name + "_" + struct_name + "_jcall,\n"
877 elif fn_line.fn_name == "free":
878 out_c = out_c + "\t\t.free = " + struct_name + "_JCalls_free,\n"
880 out_c = out_c + "\t\t.clone = " + struct_name + "_JCalls_clone,\n"
881 for var in field_vars:
882 if isinstance(var, ConvInfo):
883 if var.arg_conv_name is not None:
884 out_c = out_c + "\t\t." + var.arg_name + " = " + var.arg_conv_name + ",\n"
885 out_c = out_c + "\t\t.set_" + var.arg_name + " = NULL,\n"
887 out_c = out_c + "\t\t." + var.var_name + " = " + var.var_name + ",\n"
888 out_c = out_c + "\t\t.set_" + var.var_name + " = NULL,\n"
890 out_c += "\t\t." + var[1] + " = " + var[0] + "_init(env, clz, " + var[1]
891 for suparg in var[2]:
892 if isinstance(suparg, ConvInfo):
893 out_c = out_c + ", " + suparg.arg_name
895 out_c = out_c + ", " + suparg[1]
897 out_c = out_c + "\t};\n"
898 for var in flattened_field_vars:
899 if not isinstance(var, ConvInfo):
900 out_c = out_c + "\tcalls->" + var[1] + " = ret." + var[1] + ".this_arg;\n"
901 out_c = out_c + "\treturn ret;\n"
902 out_c = out_c + "}\n"
904 out_c = out_c + self.c_fn_ty_pfx + "int64_t " + self.c_fn_name_define_pfx(struct_name + "_new", True) + "jobject o"
905 for var in flattened_field_vars:
906 if isinstance(var, ConvInfo):
907 out_c = out_c + ", " + var.c_ty + " " + var.arg_name
909 out_c = out_c + ", jobject " + var[1]
910 out_c = out_c + ") {\n"
911 out_c = out_c + "\t" + struct_name + " *res_ptr = MALLOC(sizeof(" + struct_name + "), \"" + struct_name + "\");\n"
912 out_c = out_c + "\t*res_ptr = " + struct_name + "_init(env, clz, o"
913 for var in flattened_field_vars:
914 if isinstance(var, ConvInfo):
915 out_c = out_c + ", " + var.arg_name
917 out_c = out_c + ", " + var[1]
918 out_c = out_c + ");\n"
919 out_c = out_c + "\treturn (uint64_t)res_ptr;\n"
920 out_c = out_c + "}\n"
922 return (out_java, out_java_trait, out_c)
924 def trait_struct_inc_refcnt(self, ty_info):
925 base_conv = "\nif (" + ty_info.var_name + "_conv.free == " + ty_info.rust_obj + "_JCalls_free) {\n"
926 base_conv = base_conv + "\t// If this_arg is a JCalls struct, then we need to increment the refcnt in it.\n"
927 base_conv = base_conv + "\t" + ty_info.rust_obj + "_JCalls_clone(" + ty_info.var_name + "_conv.this_arg);\n}"
930 def map_complex_enum(self, struct_name, variant_list, camel_to_snake, enum_doc_comment):
931 java_hu_type = struct_name.replace("LDK", "").replace("COption", "Option")
936 out_java_enum += (self.hu_struct_file_prefix)
937 out_java_enum += "\n/**\n * " + enum_doc_comment.replace("\n", "\n * ") + "\n */\n"
938 out_java_enum += "@SuppressWarnings(\"unchecked\") // We correctly assign various generic arrays\n"
939 out_java_enum += ("public class " + java_hu_type + " extends CommonBase {\n")
940 out_java_enum += ("\tprivate " + java_hu_type + "(Object _dummy, long ptr) { super(ptr); }\n")
941 out_java_enum += ("\t@Override @SuppressWarnings(\"deprecation\")\n")
942 out_java_enum += ("\tprotected void finalize() throws Throwable {\n")
943 out_java_enum += ("\t\tsuper.finalize();\n")
944 out_java_enum += ("\t\tif (ptr != 0) { bindings." + struct_name.replace("LDK", "") + "_free(ptr); }\n")
945 out_java_enum += ("\t}\n")
946 out_java_enum += ("\tstatic " + java_hu_type + " constr_from_ptr(long ptr) {\n")
947 out_java_enum += ("\t\tbindings." + struct_name + " raw_val = bindings." + struct_name + "_ref_from_ptr(ptr);\n")
948 java_hu_subclasses = ""
950 init_meth_jty_strs = {}
952 out_java += ("\tpublic static class " + struct_name + " {\n")
953 out_java += ("\t\tprivate " + struct_name + "() {}\n")
954 for var in variant_list:
955 out_java += ("\t\tpublic final static class " + var.var_name + " extends " + struct_name + " {\n")
956 java_hu_subclasses = java_hu_subclasses + "\tpublic final static class " + var.var_name + " extends " + java_hu_type + " {\n"
957 out_java_enum += ("\t\tif (raw_val.getClass() == bindings." + struct_name + "." + var.var_name + ".class) {\n")
958 out_java_enum += ("\t\t\treturn new " + var.var_name + "(ptr, (bindings." + struct_name + "." + var.var_name + ")raw_val);\n")
959 init_meth_jty_str = ""
960 init_meth_params = ""
963 for idx, field_ty in enumerate(var.fields):
965 init_meth_params = init_meth_params + ", "
967 if field_ty.java_hu_ty == var.var_name:
968 field_path = field_ty.java_fn_ty_arg.strip("L;").replace("/", ".")
969 out_java += "\t\t\tpublic " + field_path + " " + field_ty.arg_name + ";\n"
970 java_hu_subclasses = java_hu_subclasses + "\t\tpublic final " + field_path + " " + field_ty.arg_name + ";\n"
971 init_meth_params = init_meth_params + field_path + " " + field_ty.arg_name
973 out_java += "\t\t\tpublic " + field_ty.java_ty + " " + field_ty.arg_name + ";\n"
974 java_hu_subclasses = java_hu_subclasses + "\t\tpublic final " + field_ty.java_hu_ty + " " + field_ty.arg_name + ";\n"
975 init_meth_params = init_meth_params + field_ty.java_ty + " " + field_ty.arg_name
976 init_meth_body = init_meth_body + "this." + field_ty.arg_name + " = " + field_ty.arg_name + "; "
977 if field_ty.to_hu_conv is not None:
978 hu_conv_body = hu_conv_body + "\t\t\t" + field_ty.java_ty + " " + field_ty.arg_name + " = obj." + field_ty.arg_name + ";\n"
979 hu_conv_body = hu_conv_body + "\t\t\t" + field_ty.to_hu_conv.replace("\n", "\n\t\t\t") + "\n"
980 hu_conv_body = hu_conv_body + "\t\t\tthis." + field_ty.arg_name + " = " + field_ty.to_hu_conv_name + ";\n"
982 hu_conv_body = hu_conv_body + "\t\t\tthis." + field_ty.arg_name + " = obj." + field_ty.arg_name + ";\n"
983 init_meth_jty_str = init_meth_jty_str + field_ty.java_fn_ty_arg
984 out_java += ("\t\t\t" + var.var_name + "(" + init_meth_params + ") { ")
985 out_java += (init_meth_body)
987 out_java += ("\t\t}\n")
988 out_java_enum += ("\t\t}\n")
989 java_hu_subclasses = java_hu_subclasses + "\t\tprivate " + var.var_name + "(long ptr, bindings." + struct_name + "." + var.var_name + " obj) {\n\t\t\tsuper(null, ptr);\n"
990 java_hu_subclasses = java_hu_subclasses + hu_conv_body
991 java_hu_subclasses = java_hu_subclasses + "\t\t}\n\t}\n"
992 init_meth_jty_strs[var.var_name] = init_meth_jty_str
993 out_java += ("\t\tstatic native void init();\n")
994 out_java += ("\t}\n")
995 out_java_enum += ("\t\tassert false; return null; // Unreachable without extending the (internal) bindings interface\n\t}\n\n")
996 out_java_enum += (java_hu_subclasses)
997 out_java += ("\tstatic { " + struct_name + ".init(); }\n")
998 out_java += ("\tpublic static native " + struct_name + " " + struct_name + "_ref_from_ptr(long ptr);\n");
1000 out_c += (self.c_complex_enum_pfx(struct_name, [x.var_name for x in variant_list], init_meth_jty_strs))
1002 out_c += (self.c_fn_ty_pfx + self.c_complex_enum_pass_ty(struct_name) + " " + self.c_fn_name_define_pfx(struct_name + "_ref_from_ptr", True) + self.ptr_c_ty + " ptr) {\n")
1003 out_c += ("\t" + struct_name + " *obj = (" + struct_name + "*)(ptr & ~1);\n")
1004 out_c += ("\tswitch(obj->tag) {\n")
1005 for var in variant_list:
1006 out_c += ("\t\tcase " + struct_name + "_" + var.var_name + ": {\n")
1008 for idx, field_map in enumerate(var.fields):
1009 if field_map.ret_conv is not None:
1010 out_c += ("\t\t\t" + field_map.ret_conv[0].replace("\n", "\n\t\t\t"))
1011 if var.tuple_variant:
1012 out_c += "obj->" + camel_to_snake(var.var_name)
1014 out_c += "obj->" + camel_to_snake(var.var_name) + "." + field_map.arg_name
1015 out_c += (field_map.ret_conv[1].replace("\n", "\n\t\t\t") + "\n")
1016 c_params.append(field_map.ret_conv_name)
1018 if var.tuple_variant:
1019 c_params.append("obj->" + camel_to_snake(var.var_name))
1021 c_params.append("obj->" + camel_to_snake(var.var_name) + "." + field_map.arg_name)
1022 out_c += ("\t\t\treturn " + self.c_constr_native_complex_enum(struct_name, var.var_name, c_params) + ";\n")
1023 out_c += ("\t\t}\n")
1024 out_c += ("\t\tdefault: abort();\n")
1025 out_c += ("\t}\n}\n")
1026 return (out_java, out_java_enum, out_c)
1028 def map_opaque_struct(self, struct_name, struct_doc_comment):
1029 out_opaque_struct_human = ""
1030 out_opaque_struct_human += self.hu_struct_file_prefix
1031 out_opaque_struct_human += "\n/**\n * " + struct_doc_comment.replace("\n", "\n * ") + "\n */\n"
1032 out_opaque_struct_human += "@SuppressWarnings(\"unchecked\") // We correctly assign various generic arrays\n"
1033 out_opaque_struct_human += ("public class " + struct_name.replace("LDK","") + " extends CommonBase")
1034 if struct_name.startswith("LDKLocked"):
1035 out_opaque_struct_human += (" implements AutoCloseable")
1036 out_opaque_struct_human += (" {\n")
1037 out_opaque_struct_human += ("\t" + struct_name.replace("LDK", "") + "(Object _dummy, long ptr) { super(ptr); }\n")
1038 if struct_name.startswith("LDKLocked"):
1039 out_opaque_struct_human += ("\t@Override public void close() {\n")
1041 out_opaque_struct_human += ("\t@Override @SuppressWarnings(\"deprecation\")\n")
1042 out_opaque_struct_human += ("\tprotected void finalize() throws Throwable {\n")
1043 out_opaque_struct_human += ("\t\tsuper.finalize();\n")
1044 out_opaque_struct_human += ("\t\tif (ptr != 0) { bindings." + struct_name.replace("LDK","") + "_free(ptr); }\n")
1045 out_opaque_struct_human += ("\t}\n\n")
1046 return out_opaque_struct_human
1049 def map_function(self, argument_types, c_call_string, method_name, return_type_info, struct_meth, default_constructor_args, takes_self, takes_self_as_ref, args_known, type_mapping_generator, doc_comment):
1052 out_java_struct = None
1054 out_java += ("\tpublic static native ")
1055 out_c += (self.c_fn_ty_pfx)
1056 out_c += (return_type_info.c_ty)
1057 out_java += (return_type_info.java_ty)
1058 if return_type_info.ret_conv is not None:
1059 ret_conv_pfx, ret_conv_sfx = return_type_info.ret_conv
1060 out_java += (" " + method_name + "(")
1061 have_args = len(argument_types) > 1 or (len(argument_types) > 0 and argument_types[0].c_ty != "void")
1062 out_c += (" " + self.c_fn_name_define_pfx(method_name, have_args))
1064 for idx, arg_conv_info in enumerate(argument_types):
1068 if arg_conv_info.c_ty != "void":
1069 out_c += (arg_conv_info.c_ty + " " + arg_conv_info.arg_name)
1070 out_java += (arg_conv_info.java_ty + " " + arg_conv_info.arg_name)
1072 out_java_struct = ""
1074 out_java_struct += ("\t// Skipped " + method_name + "\n")
1076 meth_n = method_name[len(struct_meth) + 1 if len(struct_meth) != 0 else 0:].strip("_")
1077 if doc_comment is not None:
1078 out_java_struct += "\t/**\n\t * " + doc_comment.replace("\n", "\n\t * ") + "\n\t */\n"
1081 out_java_struct += "\tpublic static " + return_type_info.java_hu_ty + " of("
1082 elif meth_n == "default":
1083 out_java_struct += "\tpublic static " + return_type_info.java_hu_ty + " with_default("
1085 out_java_struct += "\tpublic static " + return_type_info.java_hu_ty + " " + meth_n + "("
1087 out_java_struct += ("\tpublic " + return_type_info.java_hu_ty + " " + meth_n + "(")
1088 for idx, arg in enumerate(argument_types):
1090 if not takes_self or idx > 1:
1091 out_java_struct += ", "
1094 if arg.java_ty != "void":
1095 if arg.arg_name in default_constructor_args:
1096 for explode_idx, explode_arg in enumerate(default_constructor_args[arg.arg_name]):
1097 if explode_idx != 0:
1098 out_java_struct += (", ")
1099 out_java_struct += (
1100 explode_arg.java_hu_ty + " " + arg.arg_name + "_" + explode_arg.arg_name)
1102 out_java_struct += (arg.java_hu_ty + " " + arg.arg_name)
1103 out_java += (");\n")
1105 if out_java_struct is not None:
1106 out_java_struct += (") {\n")
1107 for info in argument_types:
1108 if info.arg_conv is not None:
1109 out_c += ("\t" + info.arg_conv.replace('\n', "\n\t") + "\n")
1110 if return_type_info.ret_conv is not None:
1111 out_c += ("\t" + ret_conv_pfx.replace('\n', '\n\t'))
1112 elif return_type_info.c_ty != "void":
1113 out_c += ("\t" + return_type_info.c_ty + " ret_val = ")
1116 if c_call_string is None:
1117 out_c += (method_name + "(")
1119 out_c += (c_call_string)
1120 for idx, info in enumerate(argument_types):
1121 if info.arg_conv_name is not None:
1124 elif c_call_string is not None:
1126 out_c += (info.arg_conv_name)
1128 if return_type_info.ret_conv is not None:
1129 out_c += (ret_conv_sfx.replace('\n', '\n\t'))
1132 for info in argument_types:
1133 if info.arg_conv_cleanup is not None:
1134 out_c += ("\n\t" + info.arg_conv_cleanup.replace("\n", "\n\t"))
1135 if return_type_info.ret_conv is not None:
1136 out_c += ("\n\treturn " + return_type_info.ret_conv_name + ";")
1137 elif return_type_info.c_ty != "void":
1138 out_c += ("\n\treturn ret_val;")
1139 out_c += ("\n}\n\n")
1142 out_java_struct += ("\t\t")
1143 if return_type_info.java_ty != "void":
1144 out_java_struct += (return_type_info.java_ty + " ret = ")
1145 out_java_struct += ("bindings." + method_name + "(")
1146 for idx, info in enumerate(argument_types):
1148 out_java_struct += (", ")
1149 if idx == 0 and takes_self:
1150 out_java_struct += ("this.ptr")
1151 elif info.arg_name in default_constructor_args:
1152 out_java_struct += ("bindings." + info.java_hu_ty + "_new(")
1153 for explode_idx, explode_arg in enumerate(default_constructor_args[info.arg_name]):
1154 if explode_idx != 0:
1155 out_java_struct += (", ")
1156 expl_arg_name = info.arg_name + "_" + explode_arg.arg_name
1157 if explode_arg.from_hu_conv is not None:
1158 out_java_struct += (
1159 explode_arg.from_hu_conv[0].replace(explode_arg.arg_name, expl_arg_name))
1161 out_java_struct += (expl_arg_name)
1162 out_java_struct += (")")
1163 elif info.from_hu_conv is not None:
1164 out_java_struct += (info.from_hu_conv[0])
1166 out_java_struct += (info.arg_name)
1167 out_java_struct += (");\n")
1168 if return_type_info.to_hu_conv is not None:
1170 out_java_struct += ("\t\t" + return_type_info.to_hu_conv.replace("\n", "\n\t\t").replace("this",
1171 return_type_info.to_hu_conv_name) + "\n")
1173 out_java_struct += ("\t\t" + return_type_info.to_hu_conv.replace("\n", "\n\t\t") + "\n")
1175 for idx, info in enumerate(argument_types):
1176 if idx == 0 and takes_self:
1178 elif info.arg_name in default_constructor_args:
1179 for explode_arg in default_constructor_args[info.arg_name]:
1180 expl_arg_name = info.arg_name + "_" + explode_arg.arg_name
1181 if explode_arg.from_hu_conv is not None and return_type_info.to_hu_conv_name:
1182 out_java_struct += ("\t\t" + explode_arg.from_hu_conv[1].replace(explode_arg.arg_name,
1183 expl_arg_name).replace(
1184 "this", return_type_info.to_hu_conv_name) + ";\n")
1185 elif info.from_hu_conv is not None and info.from_hu_conv[1] != "":
1186 if not takes_self and return_type_info.to_hu_conv_name is not None:
1187 out_java_struct += (
1188 "\t\t" + info.from_hu_conv[1].replace("this", return_type_info.to_hu_conv_name).replace("\n", "\n\t\t") + ";\n")
1190 out_java_struct += ("\t\t" + info.from_hu_conv[1].replace("\n", "\n\t\t") + ";\n")
1192 if takes_self and not takes_self_as_ref:
1193 out_java_struct += "\t\t" + argument_types[0].from_hu_conv[1].replace("\n", "\n\t\t").replace("this_arg", "this") + ";\n"
1194 if return_type_info.to_hu_conv_name is not None:
1195 out_java_struct += ("\t\treturn " + return_type_info.to_hu_conv_name + ";\n")
1196 elif return_type_info.java_ty != "void" and return_type_info.rust_obj != "LDK" + struct_meth:
1197 out_java_struct += ("\t\treturn ret;\n")
1198 out_java_struct += ("\t}\n\n")
1200 return (out_java, out_c, out_java_struct)