1 from bindingstypes import *
10 def __init__(self, DEBUG: bool, target: Target, **kwargs):
12 self.c_array_class_caches = set()
13 self.c_type_map = dict(
20 self.to_hu_conv_templates = dict(
21 ptr = '{human_type} {var_name}_hu_conv = new {human_type}(null, {var_name});',
22 default = '{human_type} {var_name}_hu_conv = new {human_type}(null, {var_name});'
25 self.bindings_header = """package org.ldk.impl;
26 import org.ldk.enums.*;
27 import org.ldk.impl.version;
29 import java.io.InputStream;
30 import java.io.IOException;
31 import java.nio.file.Files;
32 import java.nio.file.Path;
33 import java.nio.file.StandardCopyOption;
35 public class bindings {
36 public static class VecOrSliceDef {
40 public VecOrSliceDef(long dataptr, long datalen, long stride) {
41 this.dataptr = dataptr; this.datalen = datalen; this.stride = stride;
46 // Try to load natively first, this works on Android and in testing.
47 System.loadLibrary(\"lightningjni\");
48 } catch (UnsatisfiedLinkError system_load_err) {
49 // Otherwise try to load from the library jar.
50 File tmpdir = new File(System.getProperty("java.io.tmpdir"), "ldk-java-nativelib");
51 tmpdir.mkdir(); // If it fails to create, assume it was there already
52 tmpdir.deleteOnExit();
53 String libname = "liblightningjni_" + System.getProperty("os.name").replaceAll(" ", "") +
54 "-" + System.getProperty("os.arch").replaceAll(" ", "") + ".nativelib";
55 try (InputStream is = bindings.class.getResourceAsStream("/" + libname)) {
56 Path libpath = new File(tmpdir.toPath().toString(), "liblightningjni.so").toPath();
57 Files.copy(is, libpath, StandardCopyOption.REPLACE_EXISTING);
58 Runtime.getRuntime().load(libpath.toString());
59 } catch (Exception e) {
60 System.err.println("Failed to load LDK native library.");
61 System.err.println("System LDK native library load failed with: " + system_load_err);
62 System.err.println("Resource-based LDK native library load failed with: " + e);
63 throw new IllegalArgumentException(e);
66 init(java.lang.Enum.class, VecOrSliceDef.class);
68 if (!get_lib_version_string().equals(version.get_ldk_java_bindings_version()))
69 throw new IllegalArgumentException("Compiled LDK library and LDK class failes do not match");
70 // Fetching the LDK versions from C also checks that the header and binaries match
71 get_ldk_c_bindings_version();
74 static native void init(java.lang.Class c, java.lang.Class slicedef);
75 static native void init_class_cache();
76 static native String get_lib_version_string();
78 public static native String get_ldk_c_bindings_version();
79 public static native String get_ldk_version();
81 public static native boolean deref_bool(long ptr);
82 public static native long deref_long(long ptr);
83 public static native void free_heap_ptr(long ptr);
84 public static native byte[] read_bytes(long ptr, long len);
85 public static native byte[] get_u8_slice_bytes(long slice_ptr);
86 public static native long bytes_to_u8_vec(byte[] bytes);
87 public static native long new_txpointer_copy_data(byte[] txdata);
88 public static native void txpointer_free(long ptr);
89 public static native byte[] txpointer_get_buffer(long ptr);
90 public static native long vec_slice_len(long vec);
91 public static native long new_empty_slice_vec();
94 self.bindings_version_file = """package org.ldk.impl;
96 public class version {
97 public static String get_ldk_java_bindings_version() {
98 return "<git_version_ldk_garbagecollected>";
102 self.bindings_footer = "}\n"
104 self.util_fn_pfx = """package org.ldk.structs;
105 import org.ldk.impl.bindings;
106 import java.util.Arrays;
107 import javax.annotation.Nullable;
108 import org.ldk.enums.*;
110 public class UtilMethods {
112 self.util_fn_sfx = "}"
113 self.common_base = """package org.ldk.structs;
114 import java.util.LinkedList;
117 LinkedList<Object> ptrs_to = new LinkedList();
118 protected CommonBase(long ptr) { assert ptr < 0 || ptr > 1024; this.ptr = ptr; }
122 self.c_file_pfx = """#include <jni.h>
123 // On OSX jlong (ie long long) is not equivalent to int64_t, so we override here
124 #define int64_t jlong
125 #include \"org_ldk_impl_bindings.h\"
126 #include <lightning.h>
128 #include <stdatomic.h>
133 if self.target == Target.ANDROID:
134 self.c_file_pfx = self.c_file_pfx + """
135 #include <android/log.h>
136 #define DEBUG_PRINT(...) __android_log_print(ANDROID_LOG_ERROR, "LDK", __VA_ARGS__)
140 static void* redirect_stderr(void* ignored) {
143 dup2(pipes[1], STDERR_FILENO);
145 memset(buf, 0, 8192);
147 while ((len = read(pipes[0], buf, 8191)) > 0) {
148 DEBUG_PRINT("%s\\n", buf);
149 memset(buf, 0, 8192);
151 DEBUG_PRINT("End of stderr???\\n");
154 void __attribute__((constructor)) spawn_stderr_redirection() {
156 pthread_create(&thread, NULL, &redirect_stderr, NULL);
160 self.c_file_pfx = self.c_file_pfx + "#define DEBUG_PRINT(...) fprintf(stderr, __VA_ARGS__)\n"
162 if not DEBUG or sys.platform == "darwin":
163 self.c_file_pfx = self.c_file_pfx + """#define MALLOC(a, _) malloc(a)
164 #define FREE(p) if ((uint64_t)(p) > 1024) { free(p); }
167 self.c_file_pfx += """#define DO_ASSERT(a) (void)(a)
171 self.c_file_pfx = self.c_file_pfx + """#include <assert.h>
172 // Always run a, then assert it is true:
173 #define DO_ASSERT(a) do { bool _assert_val = (a); assert(_assert_val); } while(0)
174 // Assert a is true or do nothing
175 #define CHECK(a) DO_ASSERT(a)
177 void __attribute__((constructor)) debug_log_version() {
178 if (check_get_ldk_version() == NULL)
179 DEBUG_PRINT("LDK version did not match the header we built against\\n");
180 if (check_get_ldk_bindings_version() == NULL)
181 DEBUG_PRINT("LDK C Bindings version did not match the header we built against\\n");
182 DEBUG_PRINT("Loaded LDK-Java Bindings with LDK %s and LDK-C-Bindings %s\\n", check_get_ldk_version(), check_get_ldk_bindings_version());
186 if sys.platform != "darwin":
187 self.c_file_pfx += """
188 // Running a leak check across all the allocations and frees of the JDK is a mess,
189 // so instead we implement our own naive leak checker here, relying on the -wrap
190 // linker option to wrap malloc/calloc/realloc/free, tracking everyhing allocated
191 // and free'd in Rust or C across the generated bindings shared library.
195 if self.target == Target.ANDROID:
196 self.c_file_pfx = self.c_file_pfx + """
200 // Implement the execinfo functions using _Unwind_backtrace. This seems to miss many Rust
201 // symbols, so we only use it on Android, where execinfo.h is unavailable.
203 struct BacktraceState {
207 static _Unwind_Reason_Code unwind_callback(struct _Unwind_Context* context, void* arg) {
208 struct BacktraceState* state = (struct BacktraceState*)arg;
209 uintptr_t pc = _Unwind_GetIP(context);
211 if (state->current == state->end) {
212 return _URC_END_OF_STACK;
214 *state->current++ = (void*)(pc);
217 return _URC_NO_REASON;
220 int backtrace(void** buffer, int max) {
221 struct BacktraceState state = { buffer, buffer + max };
222 _Unwind_Backtrace(unwind_callback, &state);
223 return state.current - buffer;
226 void backtrace_symbols_fd(void ** buffer, int count, int _fd) {
227 for (int idx = 0; idx < count; ++idx) {
229 if (dladdr(buffer[idx], &info) && info.dli_sname) {
230 DEBUG_PRINT("%p: %s", buffer[idx], info.dli_sname);
232 DEBUG_PRINT("%p: ???", buffer[idx]);
238 self.c_file_pfx = self.c_file_pfx + "#include <execinfo.h>\n"
239 self.c_file_pfx = self.c_file_pfx + """
242 static pthread_mutex_t allocation_mtx;
244 void __attribute__((constructor)) init_mtx() {
245 DO_ASSERT(!pthread_mutex_init(&allocation_mtx, NULL));
249 typedef struct allocation {
250 struct allocation* next;
252 const char* struct_name;
255 unsigned long alloc_len;
257 static allocation* allocation_ll = NULL;
259 void* __real_malloc(size_t len);
260 void* __real_calloc(size_t nmemb, size_t len);
261 static void new_allocation(void* res, const char* struct_name, size_t len) {
262 allocation* new_alloc = __real_malloc(sizeof(allocation));
263 new_alloc->ptr = res;
264 new_alloc->struct_name = struct_name;
265 new_alloc->bt_len = backtrace(new_alloc->bt, BT_MAX);
266 new_alloc->alloc_len = len;
267 DO_ASSERT(!pthread_mutex_lock(&allocation_mtx));
268 new_alloc->next = allocation_ll;
269 allocation_ll = new_alloc;
270 DO_ASSERT(!pthread_mutex_unlock(&allocation_mtx));
272 static void* MALLOC(size_t len, const char* struct_name) {
273 void* res = __real_malloc(len);
274 new_allocation(res, struct_name, len);
277 void __real_free(void* ptr);
278 static void alloc_freed(void* ptr) {
279 allocation* p = NULL;
280 DO_ASSERT(!pthread_mutex_lock(&allocation_mtx));
281 allocation* it = allocation_ll;
282 while (it->ptr != ptr) {
283 p = it; it = it->next;
285 DEBUG_PRINT("Tried to free unknown pointer %p at:\\n", ptr);
287 int bt_len = backtrace(bt, BT_MAX);
288 backtrace_symbols_fd(bt, bt_len, STDERR_FILENO);
289 DEBUG_PRINT("\\n\\n");
290 DO_ASSERT(!pthread_mutex_unlock(&allocation_mtx));
291 return; // addrsan should catch malloc-unknown and print more info than we have
294 if (p) { p->next = it->next; } else { allocation_ll = it->next; }
295 DO_ASSERT(!pthread_mutex_unlock(&allocation_mtx));
296 DO_ASSERT(it->ptr == ptr);
299 static void FREE(void* ptr) {
300 if ((uint64_t)ptr < 1024) return; // Rust loves to create pointers to the NULL page for dummys
305 void* __wrap_malloc(size_t len) {
306 void* res = __real_malloc(len);
307 new_allocation(res, "malloc call", len);
310 void* __wrap_calloc(size_t nmemb, size_t len) {
311 void* res = __real_calloc(nmemb, len);
312 new_allocation(res, "calloc call", len);
315 void __wrap_free(void* ptr) {
316 if (ptr == NULL) return;
321 void* __real_realloc(void* ptr, size_t newlen);
322 void* __wrap_realloc(void* ptr, size_t len) {
323 if (ptr != NULL) alloc_freed(ptr);
324 void* res = __real_realloc(ptr, len);
325 new_allocation(res, "realloc call", len);
328 void __wrap_reallocarray(void* ptr, size_t new_sz) {
329 // Rust doesn't seem to use reallocarray currently
333 void __attribute__((destructor)) check_leaks() {
334 unsigned long alloc_count = 0;
335 unsigned long alloc_size = 0;
336 DEBUG_PRINT("The following LDK-allocated blocks still remain.\\n");
337 DEBUG_PRINT("Note that this is only accurate if System.gc(); System.runFinalization()\\n");
338 DEBUG_PRINT("was called prior to exit after all LDK objects were out of scope.\\n");
339 for (allocation* a = allocation_ll; a != NULL; a = a->next) {
340 DEBUG_PRINT("%s %p (%lu bytes) remains:\\n", a->struct_name, a->ptr, a->alloc_len);
341 backtrace_symbols_fd(a->bt, a->bt_len, STDERR_FILENO);
342 DEBUG_PRINT("\\n\\n");
344 alloc_size += a->alloc_len;
346 DEBUG_PRINT("%lu allocations remained for %lu bytes.\\n", alloc_count, alloc_size);
347 DEBUG_PRINT("Note that this is only accurate if System.gc(); System.runFinalization()\\n");
348 DEBUG_PRINT("was called prior to exit after all LDK objects were out of scope.\\n");
351 self.c_file_pfx = self.c_file_pfx + """
352 static jmethodID ordinal_meth = NULL;
353 static jmethodID slicedef_meth = NULL;
354 static jclass slicedef_cls = NULL;
355 JNIEXPORT void Java_org_ldk_impl_bindings_init(JNIEnv * env, jclass _b, jclass enum_class, jclass slicedef_class) {
356 ordinal_meth = (*env)->GetMethodID(env, enum_class, "ordinal", "()I");
357 CHECK(ordinal_meth != NULL);
358 slicedef_meth = (*env)->GetMethodID(env, slicedef_class, "<init>", "(JJJ)V");
359 CHECK(slicedef_meth != NULL);
360 slicedef_cls = (*env)->NewGlobalRef(env, slicedef_class);
361 CHECK(slicedef_cls != NULL);
364 JNIEXPORT jboolean JNICALL Java_org_ldk_impl_bindings_deref_1bool (JNIEnv * env, jclass _a, jlong ptr) {
365 return *((bool*)ptr);
367 JNIEXPORT jlong JNICALL Java_org_ldk_impl_bindings_deref_1long (JNIEnv * env, jclass _a, jlong ptr) {
368 return *((long*)ptr);
370 JNIEXPORT void JNICALL Java_org_ldk_impl_bindings_free_1heap_1ptr (JNIEnv * env, jclass _a, jlong ptr) {
373 JNIEXPORT jbyteArray JNICALL Java_org_ldk_impl_bindings_read_1bytes (JNIEnv * env, jclass _b, jlong ptr, jlong len) {
374 jbyteArray ret_arr = (*env)->NewByteArray(env, len);
375 (*env)->SetByteArrayRegion(env, ret_arr, 0, len, (unsigned char*)ptr);
378 JNIEXPORT jbyteArray JNICALL Java_org_ldk_impl_bindings_get_1u8_1slice_1bytes (JNIEnv * env, jclass _b, jlong slice_ptr) {
379 LDKu8slice *slice = (LDKu8slice*)slice_ptr;
380 jbyteArray ret_arr = (*env)->NewByteArray(env, slice->datalen);
381 (*env)->SetByteArrayRegion(env, ret_arr, 0, slice->datalen, slice->data);
384 JNIEXPORT int64_t impl_bindings_bytes_1to_1u8_1vec (JNIEnv * env, jclass _b, jbyteArray bytes) {
385 LDKCVec_u8Z *vec = (LDKCVec_u8Z*)MALLOC(sizeof(LDKCVec_u8Z), "LDKCVec_u8");
386 vec->datalen = (*env)->GetArrayLength(env, bytes);
387 vec->data = (uint8_t*)MALLOC(vec->datalen, "LDKCVec_u8Z Bytes");
388 (*env)->GetByteArrayRegion (env, bytes, 0, vec->datalen, vec->data);
389 return (uint64_t)vec;
391 JNIEXPORT jbyteArray JNICALL Java_org_ldk_impl_bindings_txpointer_1get_1buffer (JNIEnv * env, jclass _b, jlong ptr) {
392 LDKTransaction *txdata = (LDKTransaction*)ptr;
394 slice.data = txdata->data;
395 slice.datalen = txdata->datalen;
396 return Java_org_ldk_impl_bindings_get_1u8_1slice_1bytes(env, _b, (uint64_t)&slice);
398 JNIEXPORT int64_t JNICALL Java_org_ldk_impl_bindings_new_1txpointer_1copy_1data (JNIEnv * env, jclass _b, jbyteArray bytes) {
399 LDKTransaction *txdata = (LDKTransaction*)MALLOC(sizeof(LDKTransaction), "LDKTransaction");
400 txdata->datalen = (*env)->GetArrayLength(env, bytes);
401 txdata->data = (uint8_t*)MALLOC(txdata->datalen, "Tx Data Bytes");
402 txdata->data_is_owned = false;
403 (*env)->GetByteArrayRegion (env, bytes, 0, txdata->datalen, txdata->data);
404 return (uint64_t)txdata;
406 JNIEXPORT void JNICALL Java_org_ldk_impl_bindings_txpointer_1free (JNIEnv * env, jclass _b, jlong ptr) {
407 LDKTransaction *tx = (LDKTransaction*)ptr;
408 tx->data_is_owned = true;
409 Transaction_free(*tx);
412 JNIEXPORT jlong JNICALL Java_org_ldk_impl_bindings_vec_1slice_1len (JNIEnv * env, jclass _a, jlong ptr) {
413 // Check offsets of a few Vec types are all consistent as we're meant to be generic across types
414 _Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKCVec_SignatureZ, datalen), "Vec<*> needs to be mapped identically");
415 _Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKCVec_MessageSendEventZ, datalen), "Vec<*> needs to be mapped identically");
416 _Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKCVec_EventZ, datalen), "Vec<*> needs to be mapped identically");
417 _Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKCVec_C2Tuple_usizeTransactionZZ, datalen), "Vec<*> needs to be mapped identically");
418 LDKCVec_u8Z *vec = (LDKCVec_u8Z*)ptr;
419 return (uint64_t)vec->datalen;
421 JNIEXPORT int64_t JNICALL Java_org_ldk_impl_bindings_new_1empty_1slice_1vec (JNIEnv * env, jclass _b) {
422 // Check sizes of a few Vec types are all consistent as we're meant to be generic across types
423 _Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKCVec_SignatureZ), "Vec<*> needs to be mapped identically");
424 _Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKCVec_MessageSendEventZ), "Vec<*> needs to be mapped identically");
425 _Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKCVec_EventZ), "Vec<*> needs to be mapped identically");
426 _Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKCVec_C2Tuple_usizeTransactionZZ), "Vec<*> needs to be mapped identically");
427 LDKCVec_u8Z *vec = (LDKCVec_u8Z*)MALLOC(sizeof(LDKCVec_u8Z), "Empty LDKCVec");
430 return (uint64_t)vec;
433 // We assume that CVec_u8Z and u8slice are the same size and layout (and thus pointers to the two can be mixed)
434 _Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKu8slice), "Vec<u8> and [u8] need to have been mapped identically");
435 _Static_assert(offsetof(LDKCVec_u8Z, data) == offsetof(LDKu8slice, data), "Vec<u8> and [u8] need to have been mapped identically");
436 _Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKu8slice, datalen), "Vec<u8> and [u8] need to have been mapped identically");
438 _Static_assert(sizeof(jlong) == sizeof(int64_t), "We assume that j-types are the same as C types");
439 _Static_assert(sizeof(jbyte) == sizeof(char), "We assume that j-types are the same as C types");
440 _Static_assert(sizeof(void*) <= 8, "Pointers must fit into 64 bits");
442 typedef jlongArray int64_tArray;
443 typedef jbyteArray int8_tArray;
445 static inline jstring str_ref_to_java(JNIEnv *env, const char* chars, size_t len) {
446 // Sadly we need to create a temporary because Java can't accept a char* without a 0-terminator
447 char* conv_buf = MALLOC(len + 1, "str conv buf");
448 memcpy(conv_buf, chars, len);
450 jstring ret = (*env)->NewStringUTF(env, conv_buf);
454 static inline LDKStr java_to_owned_str(JNIEnv *env, jstring str) {
455 uint64_t str_len = (*env)->GetStringUTFLength(env, str);
456 char* newchars = MALLOC(str_len + 1, "String chars");
457 const char* jchars = (*env)->GetStringUTFChars(env, str, NULL);
458 memcpy(newchars, jchars, str_len);
459 newchars[str_len] = 0;
460 (*env)->ReleaseStringUTFChars(env, str, jchars);
464 .chars_is_owned = true
469 JNIEXPORT jstring JNICALL Java_org_ldk_impl_bindings_get_1ldk_1c_1bindings_1version(JNIEnv *env, jclass _c) {
470 return str_ref_to_java(env, check_get_ldk_bindings_version(), strlen(check_get_ldk_bindings_version()));
472 JNIEXPORT jstring JNICALL Java_org_ldk_impl_bindings_get_1ldk_1version(JNIEnv *env, jclass _c) {
473 return str_ref_to_java(env, check_get_ldk_version(), strlen(check_get_ldk_version()));
477 self.c_version_file = """JNIEXPORT jstring JNICALL Java_org_ldk_impl_bindings_get_1lib_1version_1string(JNIEnv *env, jclass _c) {
478 return str_ref_to_java(env, "<git_version_ldk_garbagecollected>", strlen("<git_version_ldk_garbagecollected>"));
481 self.hu_struct_file_prefix = """package org.ldk.structs;
483 import org.ldk.impl.bindings;
484 import org.ldk.enums.*;
485 import org.ldk.util.*;
486 import java.util.Arrays;
487 import javax.annotation.Nullable;
490 self.c_fn_ty_pfx = "JNIEXPORT "
491 self.c_fn_args_pfx = "JNIEnv *env, jclass clz"
492 self.file_ext = ".java"
493 self.ptr_c_ty = "int64_t"
494 self.ptr_native_ty = "long"
495 self.result_c_ty = "jclass"
496 self.ptr_arr = "jobjectArray"
497 self.is_arr_some_check = ("", " != NULL")
498 self.get_native_arr_len_call = ("(*env)->GetArrayLength(env, ", ")")
500 def construct_jenv(self):
501 res = "JNIEnv *env;\n"
502 res += "jint get_jenv_res = (*j_calls->vm)->GetEnv(j_calls->vm, (void**)&env, JNI_VERSION_1_6);\n"
503 res += "if (get_jenv_res == JNI_EDETACHED) {\n"
504 if self.target == Target.ANDROID:
505 res += "\tDO_ASSERT((*j_calls->vm)->AttachCurrentThread(j_calls->vm, &env, NULL) == JNI_OK);\n"
507 res += "\tDO_ASSERT((*j_calls->vm)->AttachCurrentThread(j_calls->vm, (void**)&env, NULL) == JNI_OK);\n"
509 res += "\tDO_ASSERT(get_jenv_res == JNI_OK);\n"
512 def deconstruct_jenv(self):
513 res = "if (get_jenv_res == JNI_EDETACHED) {\n"
514 res += "\tDO_ASSERT((*j_calls->vm)->DetachCurrentThread(j_calls->vm) == JNI_OK);\n"
518 def release_native_arr_ptr_call(self, ty_info, arr_var, arr_ptr_var):
519 if ty_info.subty is None or not ty_info.subty.c_ty.endswith("Array"):
520 return "(*env)->ReleasePrimitiveArrayCritical(env, " + arr_var + ", " + arr_ptr_var + ", 0)"
522 def create_native_arr_call(self, arr_len, ty_info):
523 if ty_info.c_ty == "int8_tArray":
524 return "(*env)->NewByteArray(env, " + arr_len + ")"
525 elif ty_info.subty.c_ty.endswith("Array"):
526 clz_var = ty_info.java_fn_ty_arg[1:].replace("[", "arr_of_")
527 self.c_array_class_caches.add(clz_var)
528 return "(*env)->NewObjectArray(env, " + arr_len + ", " + clz_var + "_clz, NULL);\n"
530 return "(*env)->New" + ty_info.java_ty.strip("[]").title() + "Array(env, " + arr_len + ")"
531 def set_native_arr_contents(self, arr_name, arr_len, ty_info):
532 if ty_info.c_ty == "int8_tArray":
533 return ("(*env)->SetByteArrayRegion(env, " + arr_name + ", 0, " + arr_len + ", ", ")")
536 def get_native_arr_contents(self, arr_name, dest_name, arr_len, ty_info, copy):
537 if ty_info.c_ty == "int8_tArray":
539 return "(*env)->GetByteArrayRegion(env, " + arr_name + ", 0, " + arr_len + ", " + dest_name + ")"
541 return "(*env)->GetByteArrayElements (env, " + arr_name + ", NULL)"
542 elif not ty_info.java_ty[:len(ty_info.java_ty) - 2].endswith("[]"):
543 return "(*env)->Get" + ty_info.subty.java_ty.title() + "ArrayElements (env, " + arr_name + ", NULL)"
546 def get_native_arr_elem(self, arr_name, idxc, ty_info):
547 if self.get_native_arr_contents(arr_name, "", "", ty_info, False) is None:
548 return "(*env)->GetObjectArrayElement(env, " + arr_name + ", " + idxc + ")"
550 assert False # Only called if above is None
551 def get_native_arr_ptr_call(self, ty_info):
552 if ty_info.subty is not None and ty_info.subty.c_ty.endswith("Array"):
554 return ("(*env)->GetPrimitiveArrayCritical(env, ", ", NULL)")
555 def get_native_arr_entry_call(self, ty_info, arr_name, idxc, entry_access):
556 if ty_info.subty is None or not ty_info.subty.c_ty.endswith("Array"):
558 return "(*env)->SetObjectArrayElement(env, " + arr_name + ", " + idxc + ", " + entry_access + ")"
559 def cleanup_native_arr_ref_contents(self, arr_name, dest_name, arr_len, ty_info):
560 if ty_info.c_ty == "int8_tArray":
561 return "(*env)->ReleaseByteArrayElements(env, " + arr_name + ", (int8_t*)" + dest_name + ", 0);"
563 return "(*env)->Release" + ty_info.java_ty.strip("[]").title() + "ArrayElements(env, " + arr_name + ", " + dest_name + ", 0)"
565 def str_ref_to_native_call(self, var_name, str_len):
566 return "str_ref_to_java(env, " + var_name + ", " + str_len + ")"
567 def str_ref_to_c_call(self, var_name):
568 return "java_to_owned_str(env, " + var_name + ")"
570 def c_fn_name_define_pfx(self, fn_name, has_args):
572 return "JNICALL Java_org_ldk_impl_bindings_" + fn_name.replace("_", "_1") + "(JNIEnv *env, jclass clz, "
573 return "JNICALL Java_org_ldk_impl_bindings_" + fn_name.replace("_", "_1") + "(JNIEnv *env, jclass clz"
577 for ty in sorted(self.c_array_class_caches):
578 res = res + "static jclass " + ty + "_clz = NULL;\n"
579 res = res + "JNIEXPORT void Java_org_ldk_impl_bindings_init_1class_1cache(JNIEnv * env, jclass clz) {\n"
580 for ty in sorted(self.c_array_class_caches):
581 res = res + "\t" + ty + "_clz = (*env)->FindClass(env, \"" + ty.replace("arr_of_", "[") + "\");\n"
582 res = res + "\tCHECK(" + ty + "_clz != NULL);\n"
583 res = res + "\t" + ty + "_clz = (*env)->NewGlobalRef(env, " + ty + "_clz);\n"
587 def native_c_unitary_enum_map(self, struct_name, variants, enum_doc_comment):
588 out_java_enum = "package org.ldk.enums;\n\n"
591 out_c = out_c + "static inline LDK" + struct_name + " LDK" + struct_name + "_from_java(" + self.c_fn_args_pfx + ") {\n"
592 out_c = out_c + "\tswitch ((*env)->CallIntMethod(env, clz, ordinal_meth)) {\n"
594 if enum_doc_comment is not None:
595 out_java_enum += "/**\n * " + enum_doc_comment.replace("\n", "\n * ") + "\n */\n"
596 out_java_enum += "public enum " + struct_name + " {\n"
599 out_java_enum = out_java_enum + "\t" + var + ",\n"
600 out_c = out_c + "\t\tcase %d: return %s;\n" % (ord_v, var)
602 out_java_enum = out_java_enum + "\t; static native void init();\n"
603 out_java_enum = out_java_enum + "\tstatic { init(); }\n"
604 out_java_enum = out_java_enum + "}"
605 out_java = out_java + "\tstatic { " + struct_name + ".values(); /* Force enum statics to run */ }\n"
606 out_c = out_c + "\t}\n"
607 out_c = out_c + "\tabort();\n"
608 out_c = out_c + "}\n"
610 out_c = out_c + "static jclass " + struct_name + "_class = NULL;\n"
612 out_c = out_c + "static jfieldID " + struct_name + "_" + var + " = NULL;\n"
613 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"
614 out_c = out_c + "\t" + struct_name + "_class = (*env)->NewGlobalRef(env, clz);\n"
615 out_c = out_c + "\tCHECK(" + struct_name + "_class != NULL);\n"
617 out_c = out_c + "\t" + struct_name + "_" + var + " = (*env)->GetStaticFieldID(env, " + struct_name + "_class, \"" + var + "\", \"Lorg/ldk/enums/" + struct_name + ";\");\n"
618 out_c = out_c + "\tCHECK(" + struct_name + "_" + var + " != NULL);\n"
619 out_c = out_c + "}\n"
620 out_c = out_c + "static inline jclass LDK" + struct_name + "_to_java(JNIEnv *env, LDK" + struct_name + " val) {\n"
621 out_c = out_c + "\tswitch (val) {\n"
624 out_c = out_c + "\t\tcase " + var + ":\n"
625 out_c = out_c + "\t\t\treturn (*env)->GetStaticObjectField(env, " + struct_name + "_class, " + struct_name + "_" + var + ");\n"
627 out_c = out_c + "\t\tdefault: abort();\n"
628 out_c = out_c + "\t}\n"
629 out_c = out_c + "}\n\n"
631 return (out_c, out_java_enum, out_java)
633 def c_unitary_enum_to_native_call(self, ty_info):
634 return (ty_info.rust_obj + "_to_java(env, ", ")")
635 def native_unitary_enum_to_c_call(self, ty_info):
636 return (ty_info.rust_obj + "_from_java(env, ", ")")
638 def c_complex_enum_pfx(self, struct_name, variants, init_meth_jty_strs):
641 out_c = out_c + "static jclass " + struct_name + "_" + var + "_class = NULL;\n"
642 out_c = out_c + "static jmethodID " + struct_name + "_" + var + "_meth = NULL;\n"
643 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"
644 for var_name in variants:
645 out_c = out_c + "\t" + struct_name + "_" + var_name + "_class =\n"
646 if self.target == Target.ANDROID:
647 out_c = out_c + "\t\t(*env)->NewGlobalRef(env, (*env)->FindClass(env, \"org/ldk/impl/bindings$" + struct_name + "$" + var_name + "\"));\n"
649 out_c = out_c + "\t\t(*env)->NewGlobalRef(env, (*env)->FindClass(env, \"Lorg/ldk/impl/bindings$" + struct_name + "$" + var_name + ";\"));\n"
650 out_c = out_c + "\tCHECK(" + struct_name + "_" + var_name + "_class != NULL);\n"
651 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"
652 out_c = out_c + "\tCHECK(" + struct_name + "_" + var_name + "_meth != NULL);\n"
653 out_c = out_c + "}\n"
656 def c_complex_enum_pass_ty(self, struct_name):
659 def c_constr_native_complex_enum(self, struct_name, variant, c_params):
660 ret = "(*env)->NewObject(env, " + struct_name + "_" + variant + "_class, " + struct_name + "_" + variant + "_meth"
661 for param in c_params:
662 ret = ret + ", " + param
665 def native_c_map_trait(self, struct_name, field_vars, flattened_field_vars, field_fns, trait_doc_comment):
669 # First generate most of the Java code, note that we need information about java method argument strings for C
670 out_java_trait = out_java_trait + self.hu_struct_file_prefix
671 if trait_doc_comment is not None:
672 out_java_trait += "/**\n * " + trait_doc_comment.replace("\n", "\n * ") + "\n */\n"
673 out_java_trait += "@SuppressWarnings(\"unchecked\") // We correctly assign various generic arrays\n"
674 out_java_trait = out_java_trait + "public class " + struct_name.replace("LDK","") + " extends CommonBase {\n"
675 out_java_trait = out_java_trait + "\tfinal bindings." + struct_name + " bindings_instance;\n"
676 out_java_trait = out_java_trait + "\t" + struct_name.replace("LDK", "") + "(Object _dummy, long ptr) { super(ptr); bindings_instance = null; }\n"
677 out_java_trait = out_java_trait + "\tprivate " + struct_name.replace("LDK", "") + "(bindings." + struct_name + " arg"
678 for var in flattened_field_vars:
679 if isinstance(var, ConvInfo):
680 out_java_trait = out_java_trait + ", " + var.java_hu_ty + " " + var.arg_name
682 out_java_trait = out_java_trait + ", bindings." + var[0] + " " + var[1]
683 out_java_trait = out_java_trait + ") {\n"
684 out_java_trait = out_java_trait + "\t\tsuper(bindings." + struct_name + "_new(arg"
685 for var in flattened_field_vars:
686 if isinstance(var, ConvInfo):
687 if var.from_hu_conv is not None:
688 out_java_trait = out_java_trait + ", " + var.from_hu_conv[0]
690 out_java_trait = out_java_trait + ", " + var.arg_name
692 out_java_trait = out_java_trait + ", " + var[1]
693 out_java_trait = out_java_trait + "));\n"
694 out_java_trait = out_java_trait + "\t\tthis.ptrs_to.add(arg);\n"
695 for var in flattened_field_vars:
696 if isinstance(var, ConvInfo):
697 if var.from_hu_conv is not None and var.from_hu_conv[1] != "":
698 out_java_trait = out_java_trait + "\t\t" + var.from_hu_conv[1].replace("\n", "\n\t\t") + ";\n"
700 out_java_trait = out_java_trait + "\t\tthis.ptrs_to.add(" + var[1] + ");\n"
701 out_java_trait = out_java_trait + "\t\tthis.bindings_instance = arg;\n"
702 out_java_trait = out_java_trait + "\t}\n"
703 out_java_trait = out_java_trait + "\t@Override @SuppressWarnings(\"deprecation\")\n"
704 out_java_trait = out_java_trait + "\tprotected void finalize() throws Throwable {\n"
705 out_java_trait = out_java_trait + "\t\tif (ptr != 0) { bindings." + struct_name.replace("LDK","") + "_free(ptr); } super.finalize();\n"
706 out_java_trait = out_java_trait + "\t}\n\n"
708 java_trait_constr = "\tprivate static class " + struct_name + "Holder { " + struct_name.replace("LDK", "") + " held; }\n"
709 java_trait_constr = java_trait_constr + "\tpublic static " + struct_name.replace("LDK", "") + " new_impl(" + struct_name.replace("LDK", "") + "Interface arg"
710 for var in flattened_field_vars:
711 if isinstance(var, ConvInfo):
712 java_trait_constr = java_trait_constr + ", " + var.java_hu_ty + " " + var.arg_name
714 # Ideally we'd be able to take any instance of the interface, but our C code can only represent
715 # Java-implemented version, so we require users pass a Java implementation here :/
716 java_trait_constr = java_trait_constr + ", " + var[0].replace("LDK", "") + "." + var[0].replace("LDK", "") + "Interface " + var[1] + "_impl"
717 java_trait_constr = java_trait_constr + ") {\n\t\tfinal " + struct_name + "Holder impl_holder = new " + struct_name + "Holder();\n"
718 java_trait_constr = java_trait_constr + "\t\timpl_holder.held = new " + struct_name.replace("LDK", "") + "(new bindings." + struct_name + "() {\n"
719 out_java_trait = out_java_trait + "\tpublic static interface " + struct_name.replace("LDK", "") + "Interface {\n"
720 out_java = out_java + "\tpublic interface " + struct_name + " {\n"
722 for fn_line in field_fns:
723 java_meth_descr = "("
724 if fn_line.fn_name != "free" and fn_line.fn_name != "cloned":
725 out_java = out_java + "\t\t " + fn_line.ret_ty_info.java_ty + " " + fn_line.fn_name + "("
726 java_trait_constr = java_trait_constr + "\t\t\t@Override public " + fn_line.ret_ty_info.java_ty + " " + fn_line.fn_name + "("
727 out_java_trait += "\t\t/**\n\t\t * " + fn_line.docs.replace("\n", "\n\t\t * ") + "\n\t\t */\n"
728 out_java_trait = out_java_trait + "\t\t" + fn_line.ret_ty_info.java_hu_ty + " " + fn_line.fn_name + "("
730 for idx, arg_conv_info in enumerate(fn_line.args_ty):
732 out_java = out_java + ", "
733 java_trait_constr = java_trait_constr + ", "
734 out_java_trait = out_java_trait + ", "
735 out_java = out_java + arg_conv_info.java_ty + " " + arg_conv_info.arg_name
736 out_java_trait = out_java_trait + arg_conv_info.java_hu_ty + " " + arg_conv_info.arg_name
737 java_trait_constr = java_trait_constr + arg_conv_info.java_ty + " " + arg_conv_info.arg_name
738 java_meth_descr = java_meth_descr + arg_conv_info.java_fn_ty_arg
739 java_meth_descr = java_meth_descr + ")" + fn_line.ret_ty_info.java_fn_ty_arg
740 java_meths.append((fn_line.fn_name, java_meth_descr))
742 out_java = out_java + ");\n"
743 out_java_trait = out_java_trait + ");\n"
744 java_trait_constr = java_trait_constr + ") {\n"
746 for arg_info in fn_line.args_ty:
747 if arg_info.to_hu_conv is not None:
748 java_trait_constr = java_trait_constr + "\t\t\t\t" + arg_info.to_hu_conv.replace("\n", "\n\t\t\t\t") + "\n"
750 if fn_line.ret_ty_info.java_ty != "void":
751 java_trait_constr = java_trait_constr + "\t\t\t\t" + fn_line.ret_ty_info.java_hu_ty + " ret = arg." + fn_line.fn_name + "("
753 java_trait_constr = java_trait_constr + "\t\t\t\targ." + fn_line.fn_name + "("
755 for idx, arg_info in enumerate(fn_line.args_ty):
757 java_trait_constr = java_trait_constr + ", "
758 if arg_info.to_hu_conv_name is not None:
759 java_trait_constr = java_trait_constr + arg_info.to_hu_conv_name
761 java_trait_constr = java_trait_constr + arg_info.arg_name
763 java_trait_constr = java_trait_constr + ");\n"
764 if fn_line.ret_ty_info.java_ty != "void":
765 if fn_line.ret_ty_info.from_hu_conv is not None:
766 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"
767 if fn_line.ret_ty_info.from_hu_conv[1] != "":
768 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"
769 #if fn_line.ret_ty_info.rust_obj in result_types:
770 java_trait_constr = java_trait_constr + "\t\t\t\treturn result;\n"
772 java_trait_constr = java_trait_constr + "\t\t\t\treturn ret;\n"
773 java_trait_constr = java_trait_constr + "\t\t\t}\n"
774 java_trait_constr = java_trait_constr + "\t\t}"
775 for var in field_vars:
776 if isinstance(var, ConvInfo):
777 java_trait_constr = java_trait_constr + ", " + var.arg_name
779 java_trait_constr += ", " + var[1] + ".new_impl(" + var[1] + "_impl"
780 for suparg in var[2]:
781 if isinstance(suparg, ConvInfo):
782 java_trait_constr += ", " + suparg.arg_name
784 java_trait_constr += ", " + suparg[1]
785 java_trait_constr += ").bindings_instance"
786 for suparg in var[2]:
787 if isinstance(suparg, ConvInfo):
788 java_trait_constr += ", " + suparg.arg_name
790 java_trait_constr += ", " + suparg[1]
791 out_java_trait = out_java_trait + "\t}\n"
792 out_java_trait = out_java_trait + java_trait_constr + ");\n\t\treturn impl_holder.held;\n\t}\n"
794 out_java = out_java + "\t}\n"
796 out_java = out_java + "\tpublic static native long " + struct_name + "_new(" + struct_name + " impl"
797 for var in flattened_field_vars:
798 if isinstance(var, ConvInfo):
799 out_java = out_java + ", " + var.java_ty + " " + var.arg_name
801 out_java = out_java + ", " + var[0] + " " + var[1]
802 out_java = out_java + ");\n"
804 # Now that we've written out our java code (and created java_meths), generate C
805 out_c = "typedef struct " + struct_name + "_JCalls {\n"
806 out_c = out_c + "\tatomic_size_t refcnt;\n"
807 out_c = out_c + "\tJavaVM *vm;\n"
808 out_c = out_c + "\tjweak o;\n"
809 for var in flattened_field_vars:
810 if isinstance(var, ConvInfo):
811 # We're a regular ol' field
815 out_c = out_c + "\t" + var[0] + "_JCalls* " + var[1] + ";\n"
817 if fn.fn_name != "free" and fn.fn_name != "cloned":
818 out_c = out_c + "\tjmethodID " + fn.fn_name + "_meth;\n"
819 out_c = out_c + "} " + struct_name + "_JCalls;\n"
821 for fn_line in field_fns:
822 if fn_line.fn_name == "free":
823 out_c = out_c + "static void " + struct_name + "_JCalls_free(void* this_arg) {\n"
824 out_c = out_c + "\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n"
825 out_c = out_c + "\tif (atomic_fetch_sub_explicit(&j_calls->refcnt, 1, memory_order_acquire) == 1) {\n"
826 out_c += "\t\t" + self.construct_jenv().replace("\n", "\n\t\t").strip() + "\n"
827 out_c = out_c + "\t\t(*env)->DeleteWeakGlobalRef(env, j_calls->o);\n"
828 out_c += "\t\t" + self.deconstruct_jenv().replace("\n", "\n\t\t").strip() + "\n"
829 out_c = out_c + "\t\tFREE(j_calls);\n"
830 out_c = out_c + "\t}\n}\n"
832 for idx, fn_line in enumerate(field_fns):
833 if fn_line.fn_name != "free" and fn_line.fn_name != "cloned":
834 assert fn_line.ret_ty_info.ty_info.get_full_rust_ty()[1] == ""
835 out_c = out_c + fn_line.ret_ty_info.ty_info.get_full_rust_ty()[0] + " " + fn_line.fn_name + "_" + struct_name + "_jcall("
836 if fn_line.self_is_const:
837 out_c = out_c + "const void* this_arg"
839 out_c = out_c + "void* this_arg"
841 for idx, arg in enumerate(fn_line.args_ty):
842 out_c = out_c + ", " + arg.ty_info.get_full_rust_ty()[0] + " " + arg.arg_name + arg.ty_info.get_full_rust_ty()[1]
844 out_c = out_c + ") {\n"
845 out_c = out_c + "\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n"
846 out_c += "\t" + self.construct_jenv().replace("\n", "\n\t").strip() + "\n"
848 for arg_info in fn_line.args_ty:
849 if arg_info.ret_conv is not None:
850 out_c = out_c + "\t" + arg_info.ret_conv[0].replace('\n', '\n\t')
851 out_c = out_c + arg_info.arg_name
852 out_c = out_c + arg_info.ret_conv[1].replace('\n', '\n\t') + "\n"
854 out_c = out_c + "\tjobject obj = (*env)->NewLocalRef(env, j_calls->o);\n\tCHECK(obj != NULL);\n"
855 if fn_line.ret_ty_info.c_ty.endswith("Array"):
856 out_c = out_c + "\t" + fn_line.ret_ty_info.c_ty + " ret = (*env)->CallObjectMethod(env, obj, j_calls->" + fn_line.fn_name + "_meth"
857 elif fn_line.ret_ty_info.c_ty == "void":
858 out_c += "\t(*env)->Call" + fn_line.ret_ty_info.java_ty.title() + "Method(env, obj, j_calls->" + fn_line.fn_name + "_meth"
859 elif fn_line.ret_ty_info.java_ty == "String":
860 # Manually write out String methods as they're just an Object
861 out_c += "\t" + fn_line.ret_ty_info.c_ty + " ret = (*env)->CallObjectMethod(env, obj, j_calls->" + fn_line.fn_name + "_meth"
862 elif not fn_line.ret_ty_info.passed_as_ptr:
863 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"
865 out_c = out_c + "\tuint64_t ret = (*env)->CallLongMethod(env, obj, j_calls->" + fn_line.fn_name + "_meth"
867 for idx, arg_info in enumerate(fn_line.args_ty):
868 if arg_info.ret_conv is not None:
869 out_c = out_c + ", " + arg_info.ret_conv_name
871 out_c = out_c + ", " + arg_info.arg_name
872 out_c = out_c + ");\n"
874 out_c += "\tif ((*env)->ExceptionCheck(env)) {\n"
875 out_c += "\t\t(*env)->ExceptionDescribe(env);\n"
876 out_c += "\t\t(*env)->FatalError(env, \"A call to " + fn_line.fn_name + " in " + struct_name + " from rust threw an exception.\");\n"
879 if fn_line.ret_ty_info.arg_conv is not None:
880 out_c += "\t" + fn_line.ret_ty_info.arg_conv.replace("\n", "\n\t") + "\n"
881 out_c += "\t" + self.deconstruct_jenv().replace("\n", "\n\t").strip() + "\n"
882 out_c += "\treturn " + fn_line.ret_ty_info.arg_conv_name + ";\n"
884 out_c += "\t" + self.deconstruct_jenv().replace("\n", "\n\t").strip() + "\n"
885 if not fn_line.ret_ty_info.passed_as_ptr and fn_line.ret_ty_info.c_ty != "void":
886 out_c += "\treturn ret;\n"
888 out_c = out_c + "}\n"
890 # If we can, write out a clone function whether we need one or not, as we use them in moving to rust
891 can_clone_with_ptr = True
892 for var in field_vars:
893 if isinstance(var, ConvInfo):
894 can_clone_with_ptr = False
895 if can_clone_with_ptr:
896 out_c = out_c + "static void " + struct_name + "_JCalls_cloned(" + struct_name + "* new_obj) {\n"
897 out_c = out_c + "\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) new_obj->this_arg;\n"
898 out_c = out_c + "\tatomic_fetch_add_explicit(&j_calls->refcnt, 1, memory_order_release);\n"
899 for var in field_vars:
900 if not isinstance(var, ConvInfo):
901 out_c = out_c + "\tatomic_fetch_add_explicit(&j_calls->" + var[1] + "->refcnt, 1, memory_order_release);\n"
902 out_c = out_c + "}\n"
904 out_c = out_c + "static inline " + struct_name + " " + struct_name + "_init (" + self.c_fn_args_pfx + ", 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"
912 out_c = out_c + "\tjclass c = (*env)->GetObjectClass(env, o);\n"
913 out_c = out_c + "\tCHECK(c != NULL);\n"
914 out_c = out_c + "\t" + struct_name + "_JCalls *calls = MALLOC(sizeof(" + struct_name + "_JCalls), \"" + struct_name + "_JCalls\");\n"
915 out_c = out_c + "\tatomic_init(&calls->refcnt, 1);\n"
916 out_c = out_c + "\tDO_ASSERT((*env)->GetJavaVM(env, &calls->vm) == 0);\n"
917 out_c = out_c + "\tcalls->o = (*env)->NewWeakGlobalRef(env, o);\n"
919 for (fn_name, java_meth_descr) in java_meths:
920 if fn_name != "free" and fn_name != "cloned":
921 out_c = out_c + "\tcalls->" + fn_name + "_meth = (*env)->GetMethodID(env, c, \"" + fn_name + "\", \"" + java_meth_descr + "\");\n"
922 out_c = out_c + "\tCHECK(calls->" + fn_name + "_meth != NULL);\n"
924 for var in flattened_field_vars:
925 if isinstance(var, ConvInfo) and var.arg_conv is not None:
926 out_c = out_c + "\n\t" + var.arg_conv.replace("\n", "\n\t") +"\n"
927 out_c = out_c + "\n\t" + struct_name + " ret = {\n"
928 out_c = out_c + "\t\t.this_arg = (void*) calls,\n"
929 for fn_line in field_fns:
930 if fn_line.fn_name != "free" and fn_line.fn_name != "cloned":
931 out_c = out_c + "\t\t." + fn_line.fn_name + " = " + fn_line.fn_name + "_" + struct_name + "_jcall,\n"
932 elif fn_line.fn_name == "free":
933 out_c = out_c + "\t\t.free = " + struct_name + "_JCalls_free,\n"
935 out_c = out_c + "\t\t.cloned = " + struct_name + "_JCalls_cloned,\n"
936 for var in field_vars:
937 if isinstance(var, ConvInfo):
938 if var.arg_conv_name is not None:
939 out_c = out_c + "\t\t." + var.arg_name + " = " + var.arg_conv_name + ",\n"
940 out_c = out_c + "\t\t.set_" + var.arg_name + " = NULL,\n"
942 out_c = out_c + "\t\t." + var.var_name + " = " + var.var_name + ",\n"
943 out_c = out_c + "\t\t.set_" + var.var_name + " = NULL,\n"
945 out_c += "\t\t." + var[1] + " = " + var[0] + "_init(env, clz, " + var[1]
946 for suparg in var[2]:
947 if isinstance(suparg, ConvInfo):
948 out_c = out_c + ", " + suparg.arg_name
950 out_c = out_c + ", " + suparg[1]
952 out_c = out_c + "\t};\n"
953 for var in flattened_field_vars:
954 if not isinstance(var, ConvInfo):
955 out_c = out_c + "\tcalls->" + var[1] + " = ret." + var[1] + ".this_arg;\n"
956 out_c = out_c + "\treturn ret;\n"
957 out_c = out_c + "}\n"
959 out_c = out_c + self.c_fn_ty_pfx + "int64_t " + self.c_fn_name_define_pfx(struct_name + "_new", True) + "jobject o"
960 for var in flattened_field_vars:
961 if isinstance(var, ConvInfo):
962 out_c = out_c + ", " + var.c_ty + " " + var.arg_name
964 out_c = out_c + ", jobject " + var[1]
965 out_c = out_c + ") {\n"
966 out_c = out_c + "\t" + struct_name + " *res_ptr = MALLOC(sizeof(" + struct_name + "), \"" + struct_name + "\");\n"
967 out_c = out_c + "\t*res_ptr = " + struct_name + "_init(env, clz, o"
968 for var in flattened_field_vars:
969 if isinstance(var, ConvInfo):
970 out_c = out_c + ", " + var.arg_name
972 out_c = out_c + ", " + var[1]
973 out_c = out_c + ");\n"
974 out_c = out_c + "\treturn (uint64_t)res_ptr;\n"
975 out_c = out_c + "}\n"
977 for var in flattened_field_vars:
978 if not isinstance(var, ConvInfo):
979 out_java_trait += "\n\t/**\n"
980 out_java_trait += "\t * Gets the underlying " + var[1] + ".\n"
981 out_java_trait += "\t */\n"
982 underscore_name = ''.join('_' + c.lower() if c.isupper() else c for c in var[1]).strip('_')
983 out_java_trait += "\tpublic " + var[1] + " get_" + underscore_name + "() {\n"
984 out_java_trait += "\t\t" + var[1] + " res = new " + var[1] + "(null, bindings." + struct_name + "_get_" + var[1] + "(this.ptr));\n"
985 out_java_trait += "\t\tthis.ptrs_to.add(res);\n"
986 out_java_trait += "\t\treturn res;\n"
987 out_java_trait += "\t}\n"
988 out_java_trait += "\n"
990 out_java += "\tpublic static native long " + struct_name + "_get_" + var[1] + "(long arg);\n"
992 out_c += "JNIEXPORT int64_t JNICALL Java_org_ldk_impl_bindings_" + struct_name + "_1get_1" + var[1] + "(JNIEnv *env, jclass clz, int64_t arg) {\n"
993 out_c += "\t" + struct_name + " *inp = (" + struct_name + " *)(arg & ~1);\n"
994 out_c += "\tuint64_t res_ptr = (uint64_t)&inp->" + var[1] + ";\n"
995 out_c += "\tDO_ASSERT((res_ptr & 1) == 0);\n"
996 out_c += "\treturn (int64_t)(res_ptr | 1);\n"
999 return (out_java, out_java_trait, out_c)
1001 def trait_struct_inc_refcnt(self, ty_info):
1002 base_conv = "\nif (" + ty_info.var_name + "_conv.free == " + ty_info.rust_obj + "_JCalls_free) {\n"
1003 base_conv = base_conv + "\t// If this_arg is a JCalls struct, then we need to increment the refcnt in it.\n"
1004 base_conv = base_conv + "\t" + ty_info.rust_obj + "_JCalls_cloned(&" + ty_info.var_name + "_conv);\n}"
1007 def map_complex_enum(self, struct_name, variant_list, camel_to_snake, enum_doc_comment):
1008 java_hu_type = struct_name.replace("LDK", "").replace("COption", "Option")
1013 out_java_enum += (self.hu_struct_file_prefix)
1014 out_java_enum += "\n/**\n * " + enum_doc_comment.replace("\n", "\n * ") + "\n */\n"
1015 out_java_enum += "@SuppressWarnings(\"unchecked\") // We correctly assign various generic arrays\n"
1016 out_java_enum += ("public class " + java_hu_type + " extends CommonBase {\n")
1017 out_java_enum += ("\tprivate " + java_hu_type + "(Object _dummy, long ptr) { super(ptr); }\n")
1018 out_java_enum += ("\t@Override @SuppressWarnings(\"deprecation\")\n")
1019 out_java_enum += ("\tprotected void finalize() throws Throwable {\n")
1020 out_java_enum += ("\t\tsuper.finalize();\n")
1021 out_java_enum += ("\t\tif (ptr != 0) { bindings." + struct_name.replace("LDK", "") + "_free(ptr); }\n")
1022 out_java_enum += ("\t}\n")
1023 out_java_enum += ("\tstatic " + java_hu_type + " constr_from_ptr(long ptr) {\n")
1024 out_java_enum += ("\t\tbindings." + struct_name + " raw_val = bindings." + struct_name + "_ref_from_ptr(ptr);\n")
1025 java_hu_subclasses = ""
1027 init_meth_jty_strs = {}
1029 out_java += ("\tpublic static class " + struct_name + " {\n")
1030 out_java += ("\t\tprivate " + struct_name + "() {}\n")
1031 for var in variant_list:
1032 out_java += ("\t\tpublic final static class " + var.var_name + " extends " + struct_name + " {\n")
1033 java_hu_subclasses = java_hu_subclasses + "\tpublic final static class " + var.var_name + " extends " + java_hu_type + " {\n"
1034 out_java_enum += ("\t\tif (raw_val.getClass() == bindings." + struct_name + "." + var.var_name + ".class) {\n")
1035 out_java_enum += ("\t\t\treturn new " + var.var_name + "(ptr, (bindings." + struct_name + "." + var.var_name + ")raw_val);\n")
1036 init_meth_jty_str = ""
1037 init_meth_params = ""
1040 for idx, (field_ty, field_docs) in enumerate(var.fields):
1042 init_meth_params = init_meth_params + ", "
1044 if field_ty.java_hu_ty == var.var_name:
1045 field_path = field_ty.java_fn_ty_arg.strip("L;").replace("/", ".")
1046 out_java += "\t\t\tpublic " + field_path + " " + field_ty.arg_name + ";\n"
1047 java_hu_subclasses = java_hu_subclasses + "\t\tpublic final " + field_path + " " + field_ty.arg_name + ";\n"
1048 init_meth_params = init_meth_params + field_path + " " + field_ty.arg_name
1050 out_java += "\t\t\tpublic " + field_ty.java_ty + " " + field_ty.arg_name + ";\n"
1051 if field_docs is not None:
1052 java_hu_subclasses += "\t\t/**\n\t\t * " + field_docs.replace("\n", "\n\t\t * ") + "\n\t\t*/\n"
1053 java_hu_subclasses += "\t\t"
1054 if field_ty.nullable:
1055 java_hu_subclasses += "@Nullable "
1056 java_hu_subclasses += "public final " + field_ty.java_hu_ty + " " + field_ty.arg_name + ";\n"
1057 init_meth_params = init_meth_params + field_ty.java_ty + " " + field_ty.arg_name
1058 init_meth_body = init_meth_body + "this." + field_ty.arg_name + " = " + field_ty.arg_name + "; "
1059 if field_ty.to_hu_conv is not None:
1060 hu_conv_body = hu_conv_body + "\t\t\t" + field_ty.java_ty + " " + field_ty.arg_name + " = obj." + field_ty.arg_name + ";\n"
1061 hu_conv_body = hu_conv_body + "\t\t\t" + field_ty.to_hu_conv.replace("\n", "\n\t\t\t") + "\n"
1062 hu_conv_body = hu_conv_body + "\t\t\tthis." + field_ty.arg_name + " = " + field_ty.to_hu_conv_name + ";\n"
1064 hu_conv_body = hu_conv_body + "\t\t\tthis." + field_ty.arg_name + " = obj." + field_ty.arg_name + ";\n"
1065 init_meth_jty_str = init_meth_jty_str + field_ty.java_fn_ty_arg
1066 out_java += ("\t\t\t" + var.var_name + "(" + init_meth_params + ") { ")
1067 out_java += (init_meth_body)
1069 out_java += ("\t\t}\n")
1070 out_java_enum += ("\t\t}\n")
1071 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"
1072 java_hu_subclasses = java_hu_subclasses + hu_conv_body
1073 java_hu_subclasses = java_hu_subclasses + "\t\t}\n\t}\n"
1074 init_meth_jty_strs[var.var_name] = init_meth_jty_str
1075 out_java += ("\t\tstatic native void init();\n")
1076 out_java += ("\t}\n")
1077 out_java_enum += ("\t\tassert false; return null; // Unreachable without extending the (internal) bindings interface\n\t}\n\n")
1078 out_java_enum += (java_hu_subclasses)
1079 out_java += ("\tstatic { " + struct_name + ".init(); }\n")
1080 out_java += ("\tpublic static native " + struct_name + " " + struct_name + "_ref_from_ptr(long ptr);\n");
1082 out_c += (self.c_complex_enum_pfx(struct_name, [x.var_name for x in variant_list], init_meth_jty_strs))
1084 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")
1085 out_c += ("\t" + struct_name + " *obj = (" + struct_name + "*)(ptr & ~1);\n")
1086 out_c += ("\tswitch(obj->tag) {\n")
1087 for var in variant_list:
1088 out_c += ("\t\tcase " + struct_name + "_" + var.var_name + ": {\n")
1090 for idx, (field_map, field_docs) in enumerate(var.fields):
1091 if field_map.ret_conv is not None:
1092 out_c += ("\t\t\t" + field_map.ret_conv[0].replace("\n", "\n\t\t\t"))
1093 if var.tuple_variant:
1094 out_c += "obj->" + camel_to_snake(var.var_name)
1096 out_c += "obj->" + camel_to_snake(var.var_name) + "." + field_map.arg_name
1097 out_c += (field_map.ret_conv[1].replace("\n", "\n\t\t\t") + "\n")
1098 c_params.append(field_map.ret_conv_name)
1100 if var.tuple_variant:
1101 c_params.append("obj->" + camel_to_snake(var.var_name))
1103 c_params.append("obj->" + camel_to_snake(var.var_name) + "." + field_map.arg_name)
1104 out_c += ("\t\t\treturn " + self.c_constr_native_complex_enum(struct_name, var.var_name, c_params) + ";\n")
1105 out_c += ("\t\t}\n")
1106 out_c += ("\t\tdefault: abort();\n")
1107 out_c += ("\t}\n}\n")
1108 return (out_java, out_java_enum, out_c)
1110 def map_opaque_struct(self, struct_name, struct_doc_comment):
1111 out_opaque_struct_human = ""
1112 out_opaque_struct_human += self.hu_struct_file_prefix
1113 out_opaque_struct_human += "\n/**\n * " + struct_doc_comment.replace("\n", "\n * ") + "\n */\n"
1114 out_opaque_struct_human += "@SuppressWarnings(\"unchecked\") // We correctly assign various generic arrays\n"
1115 hu_name = struct_name.replace("LDKC2Tuple", "TwoTuple").replace("LDKC3Tuple", "ThreeTuple").replace("LDK", "")
1116 out_opaque_struct_human += ("public class " + hu_name + " extends CommonBase")
1117 if struct_name.startswith("LDKLocked"):
1118 out_opaque_struct_human += (" implements AutoCloseable")
1119 out_opaque_struct_human += (" {\n")
1120 out_opaque_struct_human += ("\t" + hu_name + "(Object _dummy, long ptr) { super(ptr); }\n")
1121 if struct_name.startswith("LDKLocked"):
1122 out_opaque_struct_human += ("\t@Override public void close() {\n")
1124 out_opaque_struct_human += ("\t@Override @SuppressWarnings(\"deprecation\")\n")
1125 out_opaque_struct_human += ("\tprotected void finalize() throws Throwable {\n")
1126 out_opaque_struct_human += ("\t\tsuper.finalize();\n")
1127 out_opaque_struct_human += ("\t\tif (ptr != 0) { bindings." + struct_name.replace("LDK","") + "_free(ptr); }\n")
1128 out_opaque_struct_human += ("\t}\n\n")
1129 return out_opaque_struct_human
1131 def map_tuple(self, struct_name):
1132 return self.map_opaque_struct(struct_name, "A Tuple")
1134 def map_function(self, argument_types, c_call_string, method_name, meth_n, return_type_info, struct_meth, default_constructor_args, takes_self, takes_self_as_ref, args_known, type_mapping_generator, doc_comment):
1137 out_java_struct = None
1139 out_java += ("\tpublic static native ")
1140 out_c += (self.c_fn_ty_pfx)
1141 out_c += (return_type_info.c_ty)
1142 out_java += (return_type_info.java_ty)
1143 if return_type_info.ret_conv is not None:
1144 ret_conv_pfx, ret_conv_sfx = return_type_info.ret_conv
1145 out_java += (" " + method_name + "(")
1146 have_args = len(argument_types) > 1 or (len(argument_types) > 0 and argument_types[0].c_ty != "void")
1147 out_c += (" " + self.c_fn_name_define_pfx(method_name, have_args))
1149 for idx, arg_conv_info in enumerate(argument_types):
1153 if arg_conv_info.c_ty != "void":
1154 out_c += (arg_conv_info.c_ty + " " + arg_conv_info.arg_name)
1155 out_java += (arg_conv_info.java_ty + " " + arg_conv_info.arg_name)
1157 out_java_struct = ""
1159 out_java_struct += ("\t// Skipped " + method_name + "\n")
1161 if doc_comment is not None:
1162 out_java_struct += "\t/**\n\t * " + doc_comment.replace("\n", "\n\t * ") + "\n\t */\n"
1163 if return_type_info.nullable:
1164 out_java_struct += "\t@Nullable\n"
1167 out_java_struct += "\tpublic static " + return_type_info.java_hu_ty + " of("
1168 elif meth_n == "default":
1169 out_java_struct += "\tpublic static " + return_type_info.java_hu_ty + " with_default("
1171 out_java_struct += "\tpublic static " + return_type_info.java_hu_ty + " " + meth_n + "("
1173 out_java_struct += ("\tpublic " + return_type_info.java_hu_ty + " " + meth_n + "(")
1174 for idx, arg in enumerate(argument_types):
1176 if not takes_self or idx > 1:
1177 out_java_struct += ", "
1180 if arg.java_ty != "void":
1181 if arg.arg_name in default_constructor_args:
1182 assert not arg.nullable
1183 for explode_idx, explode_arg in enumerate(default_constructor_args[arg.arg_name]):
1184 if explode_idx != 0:
1185 out_java_struct += (", ")
1186 out_java_struct += (
1187 explode_arg.java_hu_ty + " " + arg.arg_name + "_" + explode_arg.arg_name)
1190 out_java_struct += "@Nullable "
1191 ty_string = arg.java_hu_ty
1192 if arg.java_fn_ty_arg[0] == "L" and arg.java_fn_ty_arg[len(arg.java_fn_ty_arg) - 1] == ";":
1193 ty_string = arg.java_fn_ty_arg.strip("L;").replace("/", ".")
1194 out_java_struct += ty_string + " " + arg.arg_name
1195 out_java += (");\n")
1197 if out_java_struct is not None:
1198 out_java_struct += (") {\n")
1199 for info in argument_types:
1200 if info.arg_conv is not None:
1201 out_c += ("\t" + info.arg_conv.replace('\n', "\n\t") + "\n")
1202 if return_type_info.ret_conv is not None:
1203 out_c += ("\t" + ret_conv_pfx.replace('\n', '\n\t'))
1204 elif return_type_info.c_ty != "void":
1205 out_c += ("\t" + return_type_info.c_ty + " ret_val = ")
1208 if c_call_string is None:
1209 out_c += (method_name + "(")
1211 out_c += (c_call_string)
1212 for idx, info in enumerate(argument_types):
1213 if info.arg_conv_name is not None:
1216 elif c_call_string is not None:
1218 out_c += (info.arg_conv_name)
1220 if return_type_info.ret_conv is not None:
1221 out_c += (ret_conv_sfx.replace('\n', '\n\t'))
1224 for info in argument_types:
1225 if info.arg_conv_cleanup is not None:
1226 out_c += ("\n\t" + info.arg_conv_cleanup.replace("\n", "\n\t"))
1227 if return_type_info.ret_conv is not None:
1228 out_c += ("\n\treturn " + return_type_info.ret_conv_name + ";")
1229 elif return_type_info.c_ty != "void":
1230 out_c += ("\n\treturn ret_val;")
1231 out_c += ("\n}\n\n")
1234 out_java_struct += ("\t\t")
1235 if return_type_info.java_ty != "void":
1236 out_java_struct += (return_type_info.java_ty + " ret = ")
1237 out_java_struct += ("bindings." + method_name + "(")
1238 for idx, info in enumerate(argument_types):
1240 out_java_struct += (", ")
1241 if idx == 0 and takes_self:
1242 out_java_struct += ("this.ptr")
1243 elif info.arg_name in default_constructor_args:
1244 out_java_struct += ("bindings." + info.java_hu_ty + "_new(")
1245 for explode_idx, explode_arg in enumerate(default_constructor_args[info.arg_name]):
1246 if explode_idx != 0:
1247 out_java_struct += (", ")
1248 expl_arg_name = info.arg_name + "_" + explode_arg.arg_name
1249 if explode_arg.from_hu_conv is not None:
1250 out_java_struct += (
1251 explode_arg.from_hu_conv[0].replace(explode_arg.arg_name, expl_arg_name))
1253 out_java_struct += (expl_arg_name)
1254 out_java_struct += (")")
1255 elif info.from_hu_conv is not None:
1256 out_java_struct += (info.from_hu_conv[0])
1258 out_java_struct += (info.arg_name)
1259 out_java_struct += (");\n")
1260 if return_type_info.java_ty == "long" and return_type_info.java_hu_ty != "long":
1261 out_java_struct += "\t\tif (ret >= 0 && ret < 1024) { return null; }\n"
1263 if return_type_info.to_hu_conv is not None:
1265 out_java_struct += ("\t\t" + return_type_info.to_hu_conv.replace("\n", "\n\t\t").replace("this",
1266 return_type_info.to_hu_conv_name) + "\n")
1268 out_java_struct += ("\t\t" + return_type_info.to_hu_conv.replace("\n", "\n\t\t") + "\n")
1270 for idx, info in enumerate(argument_types):
1271 if idx == 0 and takes_self:
1273 elif info.arg_name in default_constructor_args:
1274 for explode_arg in default_constructor_args[info.arg_name]:
1275 expl_arg_name = info.arg_name + "_" + explode_arg.arg_name
1276 if explode_arg.from_hu_conv is not None and return_type_info.to_hu_conv_name:
1277 out_java_struct += ("\t\t" + explode_arg.from_hu_conv[1].replace(explode_arg.arg_name,
1278 expl_arg_name).replace(
1279 "this", return_type_info.to_hu_conv_name) + ";\n")
1280 elif info.from_hu_conv is not None and info.from_hu_conv[1] != "":
1281 if not takes_self and return_type_info.to_hu_conv_name is not None:
1282 out_java_struct += (
1283 "\t\t" + info.from_hu_conv[1].replace("this", return_type_info.to_hu_conv_name).replace("\n", "\n\t\t") + ";\n")
1285 out_java_struct += ("\t\t" + info.from_hu_conv[1].replace("\n", "\n\t\t") + ";\n")
1287 if takes_self and not takes_self_as_ref:
1288 out_java_struct += "\t\t" + argument_types[0].from_hu_conv[1].replace("\n", "\n\t\t").replace("this_arg", "this") + ";\n"
1289 if return_type_info.to_hu_conv_name is not None:
1290 out_java_struct += ("\t\treturn " + return_type_info.to_hu_conv_name + ";\n")
1291 elif return_type_info.java_ty != "void" and return_type_info.rust_obj != "LDK" + struct_meth:
1292 out_java_struct += ("\t\treturn ret;\n")
1293 out_java_struct += ("\t}\n\n")
1295 return (out_java, out_c, out_java_struct)