#!/usr/bin/env python3
import sys, re
-if len(sys.argv) != 3:
- print("USAGE: /path/to/lightning.h /path/to/bindings.java")
+if len(sys.argv) != 5:
+ print("USAGE: /path/to/lightning.h /path/to/bindings/output.java /path/to/bindings/output.c debug")
+ print("debug should be true or false and indicates whether to track allocations and ensure we don't leak")
sys.exit(1)
-with open(sys.argv[1]) as f, open(sys.argv[2], "w") as out_f:
- var_is_arr_regex = re.compile("\(\*([A-za-z_]*)\)\[[0-9]*\]");
- def map_type(fn_arg, print_void):
+class TypeInfo:
+ def __init__(self, rust_obj, java_ty, java_fn_ty_arg, c_ty, passed_as_ptr, is_ptr, var_name, arr_len):
+ self.rust_obj = rust_obj
+ self.java_ty = java_ty
+ self.java_fn_ty_arg = java_fn_ty_arg
+ self.c_ty = c_ty
+ self.passed_as_ptr = passed_as_ptr
+ self.is_ptr = is_ptr
+ self.var_name = var_name
+ self.arr_len = arr_len
+
+class ConvInfo:
+ def __init__(self, ty_info, arg_name, arg_conv, arg_conv_name, ret_conv, ret_conv_name):
+ assert(ty_info.c_ty is not None)
+ assert(ty_info.java_ty is not None)
+ assert(arg_name is not None)
+ self.c_ty = ty_info.c_ty
+ self.java_ty = ty_info.java_ty
+ self.java_fn_ty_arg = ty_info.java_fn_ty_arg
+ self.arg_name = arg_name
+ self.arg_conv = arg_conv
+ self.arg_conv_name = arg_conv_name
+ self.ret_conv = ret_conv
+ self.ret_conv_name = ret_conv_name
+
+ def print_ty(self):
+ out_c.write(self.c_ty)
+ out_java.write(self.java_ty)
+
+ def print_name(self):
+ if self.arg_name != "":
+ out_java.write(" " + self.arg_name)
+ out_c.write(" " + self.arg_name)
+ else:
+ out_java.write(" arg")
+ out_c.write(" arg")
+
+with open(sys.argv[1]) as in_h, open(sys.argv[2], "w") as out_java, open(sys.argv[3], "w") as out_c:
+ opaque_structs = set()
+ trait_structs = set()
+ unitary_enums = set()
+
+ var_is_arr_regex = re.compile("\(\*([A-za-z_]*)\)\[([0-9]*)\]")
+ var_ty_regex = re.compile("([A-za-z_0-9]*)(.*)")
+ def java_c_types(fn_arg, ret_arr_len):
fn_arg = fn_arg.strip()
if fn_arg.startswith("MUST_USE_RES "):
fn_arg = fn_arg[13:]
+ is_const = False
if fn_arg.startswith("const "):
fn_arg = fn_arg[6:]
+ is_const = True
+
+ is_ptr = False
+ take_by_ptr = False
+ rust_obj = None
if fn_arg.startswith("void"):
- if print_void:
- out_f.write("void")
- else:
- return
- fn_arg = fn_arg.strip("void ")
+ java_ty = "void"
+ c_ty = "void"
+ fn_ty_arg = "V"
+ fn_arg = fn_arg[4:].strip()
elif fn_arg.startswith("bool"):
- out_f.write("boolean")
- fn_arg = fn_arg.strip("bool ")
+ java_ty = "boolean"
+ c_ty = "jboolean"
+ fn_ty_arg = "Z"
+ fn_arg = fn_arg[4:].strip()
elif fn_arg.startswith("uint8_t"):
- out_f.write("byte")
- fn_arg = fn_arg.strip("uint8_t ")
+ java_ty = "byte"
+ c_ty = "jbyte"
+ fn_ty_arg = "B"
+ fn_arg = fn_arg[7:].strip()
+ elif fn_arg.startswith("uint16_t"):
+ java_ty = "short"
+ c_ty = "jshort"
+ fn_ty_arg = "S"
+ fn_arg = fn_arg[8:].strip()
elif fn_arg.startswith("uint32_t"):
- out_f.write("int")
- fn_arg = fn_arg.strip("uint32_t ")
- elif fn_arg.startswith("uint64_t"):
- out_f.write("long")
- fn_arg = fn_arg.strip("uint64_t ")
+ java_ty = "int"
+ c_ty = "jint"
+ fn_ty_arg = "I"
+ fn_arg = fn_arg[8:].strip()
+ elif fn_arg.startswith("uint64_t") or fn_arg.startswith("uintptr_t"):
+ java_ty = "long"
+ c_ty = "jlong"
+ fn_ty_arg = "J"
+ if fn_arg.startswith("uint64_t"):
+ fn_arg = fn_arg[8:].strip()
+ else:
+ fn_arg = fn_arg[9:].strip()
+ elif is_const and fn_arg.startswith("char *"):
+ java_ty = "String"
+ c_ty = "const char*"
+ fn_ty_arg = "Ljava/lang/String;"
+ fn_arg = fn_arg[6:].strip()
else:
- out_f.write("long")
- fn_arg = "".join([e + " " for e in fn_arg.split(" ")[1:]]).strip()
+ ma = var_ty_regex.match(fn_arg)
+ if ma.group(1).strip() in unitary_enums:
+ java_ty = ma.group(1).strip()
+ c_ty = "jclass"
+ fn_ty_arg = "Lorg/ldk/impl/bindings$" + ma.group(1).strip() + ";"
+ fn_arg = ma.group(2).strip()
+ rust_obj = ma.group(1).strip()
+ take_by_ptr = True
+ else:
+ java_ty = "long"
+ c_ty = "jlong"
+ fn_ty_arg = "J"
+ fn_arg = ma.group(2).strip()
+ rust_obj = ma.group(1).strip()
+ take_by_ptr = True
+
+ if fn_arg.startswith(" *") or fn_arg.startswith("*"):
+ fn_arg = fn_arg.replace("*", "").strip()
+ is_ptr = True
+ c_ty = "jlong"
+ java_ty = "long"
+ fn_ty_arg = "J"
+
var_is_arr = var_is_arr_regex.match(fn_arg)
- if var_is_arr is not None:
- out_f.write("[] " + var_is_arr.group(1))
- elif fn_arg.strip() != "":
- out_f.write(" " + fn_arg.replace('*', '').strip())
+ if var_is_arr is not None or ret_arr_len is not None:
+ assert(not take_by_ptr)
+ assert(not is_ptr)
+ java_ty = java_ty + "[]"
+ c_ty = c_ty + "Array"
+ if var_is_arr is not None:
+ return TypeInfo(rust_obj=None, java_ty=java_ty, java_fn_ty_arg="[" + fn_ty_arg, c_ty=c_ty,
+ passed_as_ptr=False, is_ptr=False, var_name=var_is_arr.group(1), arr_len=var_is_arr.group(2))
+ return TypeInfo(rust_obj=rust_obj, java_ty=java_ty, java_fn_ty_arg=fn_ty_arg, c_ty=c_ty, passed_as_ptr=is_ptr or take_by_ptr,
+ is_ptr=is_ptr, var_name=fn_arg, arr_len=None)
+
+ def map_type(fn_arg, print_void, ret_arr_len, is_free):
+ ty_info = java_c_types(fn_arg, ret_arr_len)
+
+ if ty_info.c_ty == "void":
+ if not print_void:
+ return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
+ arg_conv = None, arg_conv_name = None, ret_conv = None, ret_conv_name = None)
+
+ if ty_info.c_ty.endswith("Array"):
+ arr_len = ty_info.arr_len
+ if arr_len is not None:
+ arr_name = ty_info.var_name
+ else:
+ arr_name = "ret"
+ arr_len = ret_arr_len
+ assert(ty_info.c_ty == "jbyteArray")
+ return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
+ arg_conv = "unsigned char " + arr_name + "_arr[" + arr_len + "];\n" +
+ "(*_env)->GetByteArrayRegion (_env, """ + arr_name + ", 0, " + arr_len + ", " + arr_name + "_arr);\n" +
+ "unsigned char (*""" + arr_name + "_ref)[" + arr_len + "] = &" + arr_name + "_arr;",
+ arg_conv_name = arr_name + "_ref",
+ ret_conv = ("jbyteArray " + arr_name + "_arr = (*_env)->NewByteArray(_env, " + arr_len + ");\n" +
+ "(*_env)->SetByteArrayRegion(_env, " + arr_name + "_arr, 0, " + arr_len + ", *",
+ ");"),
+ ret_conv_name = arr_name + "_arr")
+ elif ty_info.var_name != "":
+ # If we have a parameter name, print it (noting that it may indicate its a pointer)
+ if ty_info.rust_obj is not None:
+ assert(ty_info.passed_as_ptr)
+ if not ty_info.is_ptr:
+ if ty_info.rust_obj in unitary_enums:
+ return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
+ arg_conv = ty_info.rust_obj + " " + ty_info.var_name + "_conv = " + ty_info.rust_obj + "_from_java(_env, " + ty_info.var_name + ");",
+ arg_conv_name = ty_info.var_name + "_conv",
+ ret_conv = ("jclass " + ty_info.var_name + "_conv = " + ty_info.rust_obj + "_to_java(_env, ", ");"),
+ ret_conv_name = ty_info.var_name + "_conv")
+ base_conv = ty_info.rust_obj + " " + ty_info.var_name + "_conv = *(" + ty_info.rust_obj + "*)" + ty_info.var_name + ";";
+ if ty_info.rust_obj in trait_structs:
+ if not is_free:
+ base_conv = base_conv + "\nif (" + ty_info.var_name + "_conv.free == " + ty_info.rust_obj + "_JCalls_free) {\n"
+ base_conv = base_conv + "\t// If this_arg is a JCalls struct, then we need to increment the refcnt in it.\n"
+ base_conv = base_conv + "\t" + ty_info.rust_obj + "_JCalls_clone(" + ty_info.var_name + "_conv.this_arg);\n}"
+ else:
+ base_conv = base_conv + "\n" + "FREE((void*)" + ty_info.var_name + ");"
+ return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
+ arg_conv = base_conv,
+ arg_conv_name = ty_info.var_name + "_conv",
+ ret_conv = ("CANT PASS TRAIT TO Java?", ""), ret_conv_name = "NO CONV POSSIBLE")
+ if ty_info.rust_obj != "LDKu8slice":
+ # Don't bother free'ing slices passed in - we often pass them Rust -> Rust
+ base_conv = base_conv + "\nFREE((void*)" + ty_info.var_name + ");";
+ if ty_info.rust_obj in opaque_structs:
+ return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
+ arg_conv = base_conv + "\n" + ty_info.var_name + "_conv.is_owned = true;",
+ arg_conv_name = ty_info.var_name + "_conv",
+ ret_conv = ("long " + ty_info.var_name + "_ref = (long)&", ";"), ret_conv_name = ty_info.var_name + "_ref")
+
+ return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
+ arg_conv = base_conv, arg_conv_name = ty_info.var_name + "_conv",
+ ret_conv = ("long " + ty_info.var_name + "_ref = (long)&", ";"), ret_conv_name = ty_info.var_name + "_ref")
+ else:
+ assert(not is_free)
+ return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
+ arg_conv = ty_info.rust_obj + "* " + ty_info.var_name + "_conv = (" + ty_info.rust_obj + "*)" + ty_info.var_name + ";",
+ arg_conv_name = ty_info.var_name + "_conv",
+ ret_conv = None, ret_conv_name = None) # its a pointer, no conv needed
+ elif ty_info.is_ptr:
+ return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
+ arg_conv = None, arg_conv_name = ty_info.var_name, ret_conv = None, ret_conv_name = None)
+ elif ty_info.java_ty == "String":
+ return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
+ arg_conv = None, arg_conv_name = None,
+ ret_conv = ("jstring " + ty_info.var_name + "_conv = (*_env)->NewStringUTF(_env, ", ");"), ret_conv_name = ty_info.var_name + "_conv")
+ else:
+ return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
+ arg_conv = None, arg_conv_name = ty_info.var_name, ret_conv = None, ret_conv_name = None)
elif not print_void:
- out_f.write(" arg");
+ # We don't have a parameter name, and want one, just call it arg
+ if ty_info.rust_obj is not None:
+ assert(not is_free or ty_info.rust_obj not in opaque_structs);
+ return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
+ arg_conv = ty_info.rust_obj + " arg_conv = *(" + ty_info.rust_obj + "*)arg;\nFREE((void*)arg);",
+ arg_conv_name = "arg_conv",
+ ret_conv = None, ret_conv_name = None)
+ else:
+ assert(not is_free)
+ return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
+ arg_conv = None, arg_conv_name = "arg", ret_conv = None, ret_conv_name = None)
+ else:
+ # We don't have a parameter name, and don't want one (cause we're returning)
+ if ty_info.rust_obj is not None:
+ if not ty_info.is_ptr:
+ if ty_info.rust_obj in unitary_enums:
+ return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
+ arg_conv = ty_info.rust_obj + " ret = " + ty_info.rust_obj + "_from_java(_env, " + ty_info.var_name + ");",
+ arg_conv_name = "ret",
+ ret_conv = ("jclass ret = " + ty_info.rust_obj + "_to_java(_env, ", ");"), ret_conv_name = "ret")
+ if ty_info.rust_obj in opaque_structs:
+ # If we're returning a newly-allocated struct, we don't want Rust to ever
+ # free, instead relying on the Java GC to lose the ref. We undo this in
+ # any _free function.
+ # To avoid any issues, we first assert that the incoming object is non-ref.
+ return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
+ ret_conv = (ty_info.rust_obj + "* ret = MALLOC(sizeof(" + ty_info.rust_obj + "), \"" + ty_info.rust_obj + "\");\n*ret = ", ";\nDO_ASSERT(ret->is_owned);\nret->is_owned = false;"),
+ ret_conv_name = "(long)ret",
+ arg_conv = None, arg_conv_name = None)
+ else:
+ return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
+ ret_conv = (ty_info.rust_obj + "* ret = MALLOC(sizeof(" + ty_info.rust_obj + "), \"" + ty_info.rust_obj + "\");\n*ret = ", ";"),
+ ret_conv_name = "(long)ret",
+ arg_conv = None, arg_conv_name = None)
+ else:
+ return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
+ ret_conv = ("long ret = (long)", ";"), ret_conv_name = "ret",
+ arg_conv = None, arg_conv_name = None)
+ else:
+ return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name,
+ arg_conv = None, arg_conv_name = None, ret_conv = None, ret_conv_name = None)
+
+ def map_fn(line, re_match, ret_arr_len, c_call_string):
+ out_java.write("\t// " + line)
+ out_java.write("\tpublic static native ")
+ out_c.write("JNIEXPORT ")
+
+ ret_info = map_type(re_match.group(1), True, ret_arr_len, False)
+ ret_info.print_ty()
+ if ret_info.ret_conv is not None:
+ ret_conv_pfx, ret_conv_sfx = ret_info.ret_conv
- def map_fn_args(fn_args):
- for idx, arg in enumerate(fn_args.split(',')):
+ out_java.write(" " + re_match.group(2) + "(")
+ out_c.write(" JNICALL Java_org_ldk_impl_bindings_" + re_match.group(2).replace('_', '_1') + "(JNIEnv * _env, jclass _b")
+
+ arg_names = []
+ for idx, arg in enumerate(re_match.group(3).split(',')):
if idx != 0:
- out_f.write(", ")
- map_type(arg, False)
+ out_java.write(", ")
+ if arg != "void":
+ out_c.write(", ")
+ arg_conv_info = map_type(arg, False, None, re_match.group(2).endswith("_free"))
+ if arg_conv_info.c_ty != "void":
+ arg_conv_info.print_ty()
+ arg_conv_info.print_name()
+ arg_names.append(arg_conv_info)
+
+ out_java.write(");\n")
+ out_c.write(") {\n")
+
+ for info in arg_names:
+ if info.arg_conv is not None:
+ out_c.write("\t" + info.arg_conv.replace('\n', "\n\t") + "\n");
+
+ if ret_info.ret_conv is not None:
+ out_c.write("\t" + ret_conv_pfx.replace('\n', '\n\t'));
+ else:
+ out_c.write("\treturn ");
+
+ if c_call_string is None:
+ out_c.write(re_match.group(2) + "(")
+ else:
+ out_c.write(c_call_string)
+ for idx, info in enumerate(arg_names):
+ if info.arg_conv_name is not None:
+ if idx != 0:
+ out_c.write(", ")
+ elif c_call_string is not None:
+ continue
+ out_c.write(info.arg_conv_name)
+ out_c.write(")")
+ if ret_info.ret_conv is not None:
+ out_c.write(ret_conv_sfx.replace('\n', '\n\t'))
+ out_c.write("\n\treturn " + ret_info.ret_conv_name + ";")
+ else:
+ out_c.write(";")
+ out_c.write("\n}\n\n")
+
+ def map_trait(struct_name, field_var_lines, trait_fn_lines):
+ out_c.write("typedef struct " + struct_name + "_JCalls {\n")
+ out_c.write("\tatomic_size_t refcnt;\n")
+ out_c.write("\tJavaVM *vm;\n")
+ out_c.write("\tjobject o;\n")
+ for var_line in field_var_lines:
+ if var_line.group(1) in trait_structs:
+ out_c.write("\t" + var_line.group(1) + "_JCalls* " + var_line.group(2) + ";\n")
+ for fn_line in trait_fn_lines:
+ if fn_line.group(2) != "free" and fn_line.group(2) != "clone":
+ out_c.write("\tjmethodID " + fn_line.group(2) + "_meth;\n")
+ out_c.write("} " + struct_name + "_JCalls;\n")
+
+ out_java.write("\tpublic interface " + struct_name + " {\n")
+ java_meths = []
+ for fn_line in trait_fn_lines:
+ java_meth_descr = "("
+ if fn_line.group(2) != "free" and fn_line.group(2) != "clone":
+ ret_ty_info = java_c_types(fn_line.group(1), None)
+
+ out_java.write("\t\t " + ret_ty_info.java_ty + " " + fn_line.group(2) + "(")
+ is_const = fn_line.group(3) is not None
+ out_c.write(fn_line.group(1) + fn_line.group(2) + "_jcall(")
+ if is_const:
+ out_c.write("const void* this_arg")
+ else:
+ out_c.write("void* this_arg")
+
+ arg_names = []
+ for idx, arg in enumerate(fn_line.group(4).split(',')):
+ if arg == "":
+ continue
+ if idx >= 2:
+ out_java.write(", ")
+ out_c.write(", ")
+ arg_conv_info = map_type(arg, True, None, False)
+ out_c.write(arg.strip())
+ out_java.write(arg_conv_info.java_ty + " " + arg_conv_info.arg_name)
+ arg_names.append(arg_conv_info)
+ java_meth_descr = java_meth_descr + arg_conv_info.java_fn_ty_arg
+ java_meth_descr = java_meth_descr + ")" + ret_ty_info.java_fn_ty_arg
+ java_meths.append(java_meth_descr)
+
+ out_java.write(");\n")
+ out_c.write(") {\n")
+ out_c.write("\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n")
+ out_c.write("\tJNIEnv *env;\n")
+ out_c.write("\tDO_ASSERT((*j_calls->vm)->GetEnv(j_calls->vm, (void**)&env, JNI_VERSION_1_8) == JNI_OK);\n")
- def map_fn(re_match, ret_ty_suffix):
- out_f.write("\t/// " + line)
- out_f.write("\tpublic static native ")
- map_type(re_match.group(1), True)
- out_f.write(ret_ty_suffix + " " + re_match.group(2).replace('_', '') + "(")
- map_fn_args(re_match.group(3))
- out_f.write(");\n")
+ for arg_info in arg_names:
+ if arg_info.ret_conv is not None:
+ out_c.write("\t" + arg_info.ret_conv[0].replace('\n', '\n\t').replace("_env", "env"));
+ out_c.write(arg_info.arg_name)
+ out_c.write(arg_info.ret_conv[1].replace('\n', '\n\t').replace("_env", "env") + "\n")
- out_f.write("""package org.ldk;
+ if not ret_ty_info.passed_as_ptr:
+ out_c.write("\treturn (*env)->Call" + ret_ty_info.java_ty.title() + "Method(env, j_calls->o, j_calls->" + fn_line.group(2) + "_meth")
+ else:
+ out_c.write("\t" + fn_line.group(1).strip() + "* ret = (" + fn_line.group(1).strip() + "*)(*env)->CallLongMethod(env, j_calls->o, j_calls->" + fn_line.group(2) + "_meth");
+
+ for arg_info in arg_names:
+ if arg_info.ret_conv is not None:
+ out_c.write(", " + arg_info.ret_conv_name)
+ else:
+ out_c.write(", " + arg_info.arg_name)
+ out_c.write(");\n");
+
+ if ret_ty_info.passed_as_ptr:
+ out_c.write("\t" + fn_line.group(1).strip() + " res = *ret;\n")
+ out_c.write("\tFREE(ret);\n")
+ out_c.write("\treturn res;\n")
+ out_c.write("}\n")
+ elif fn_line.group(2) == "free":
+ out_c.write("static void " + struct_name + "_JCalls_free(void* this_arg) {\n")
+ out_c.write("\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n")
+ out_c.write("\tif (atomic_fetch_sub_explicit(&j_calls->refcnt, 1, memory_order_acquire) == 1) {\n")
+ out_c.write("\t\tJNIEnv *env;\n")
+ out_c.write("\t\tDO_ASSERT((*j_calls->vm)->GetEnv(j_calls->vm, (void**)&env, JNI_VERSION_1_8) == JNI_OK);\n")
+ out_c.write("\t\t(*env)->DeleteGlobalRef(env, j_calls->o);\n")
+ out_c.write("\t\tFREE(j_calls);\n")
+ out_c.write("\t}\n}\n")
+
+ # Write out a clone function whether we need one or not, as we use them in moving to rust
+ out_c.write("static void* " + struct_name + "_JCalls_clone(const void* this_arg) {\n")
+ out_c.write("\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n")
+ out_c.write("\tatomic_fetch_add_explicit(&j_calls->refcnt, 1, memory_order_release);\n")
+ for var_line in field_var_lines:
+ if var_line.group(1) in trait_structs:
+ out_c.write("\tatomic_fetch_add_explicit(&j_calls->" + var_line.group(2) + "->refcnt, 1, memory_order_release);\n")
+ out_c.write("\treturn (void*) this_arg;\n")
+ out_c.write("}\n")
+
+ out_java.write("\t}\n")
+
+ out_java.write("\tpublic static native long " + struct_name + "_new(" + struct_name + " impl")
+ out_c.write("static inline " + struct_name + " " + struct_name + "_init (JNIEnv * env, jclass _a, jobject o")
+ for var_line in field_var_lines:
+ if var_line.group(1) in trait_structs:
+ out_java.write(", " + var_line.group(1) + " " + var_line.group(2))
+ out_c.write(", jobject " + var_line.group(2))
+ out_java.write(");\n")
+ out_c.write(") {\n")
+
+ out_c.write("\tjclass c = (*env)->GetObjectClass(env, o);\n")
+ out_c.write("\tDO_ASSERT(c != NULL);\n")
+ out_c.write("\t" + struct_name + "_JCalls *calls = MALLOC(sizeof(" + struct_name + "_JCalls), \"" + struct_name + "_JCalls\");\n")
+ out_c.write("\tatomic_init(&calls->refcnt, 1);\n")
+ out_c.write("\tDO_ASSERT((*env)->GetJavaVM(env, &calls->vm) == 0);\n")
+ out_c.write("\tcalls->o = (*env)->NewGlobalRef(env, o);\n")
+ for (fn_line, java_meth_descr) in zip(trait_fn_lines, java_meths):
+ if fn_line.group(2) != "free" and fn_line.group(2) != "clone":
+ out_c.write("\tcalls->" + fn_line.group(2) + "_meth = (*env)->GetMethodID(env, c, \"" + fn_line.group(2) + "\", \"" + java_meth_descr + "\");\n")
+ out_c.write("\tDO_ASSERT(calls->" + fn_line.group(2) + "_meth != NULL);\n")
+ out_c.write("\n\t" + struct_name + " ret = {\n")
+ out_c.write("\t\t.this_arg = (void*) calls,\n")
+ for fn_line in trait_fn_lines:
+ if fn_line.group(2) != "free" and fn_line.group(2) != "clone":
+ out_c.write("\t\t." + fn_line.group(2) + " = " + fn_line.group(2) + "_jcall,\n")
+ elif fn_line.group(2) == "free":
+ out_c.write("\t\t.free = " + struct_name + "_JCalls_free,\n")
+ else:
+ out_c.write("\t\t.clone = " + struct_name + "_JCalls_clone,\n")
+ for var_line in field_var_lines:
+ if var_line.group(1) in trait_structs:
+ out_c.write("\t\t." + var_line.group(2) + " = " + var_line.group(1) + "_init(env, _a, " + var_line.group(2) + "),\n")
+ out_c.write("\t};\n")
+ for var_line in field_var_lines:
+ if var_line.group(1) in trait_structs:
+ out_c.write("\tcalls->" + var_line.group(2) + " = ret." + var_line.group(2) + ".this_arg;\n")
+ out_c.write("\treturn ret;\n")
+ out_c.write("}\n")
+
+ out_c.write("JNIEXPORT long JNICALL Java_org_ldk_impl_bindings_" + struct_name.replace("_", "_1") + "_1new (JNIEnv * env, jclass _a, jobject o")
+ for var_line in field_var_lines:
+ if var_line.group(1) in trait_structs:
+ out_c.write(", jobject " + var_line.group(2))
+ out_c.write(") {\n")
+ out_c.write("\t" + struct_name + " *res_ptr = MALLOC(sizeof(" + struct_name + "), \"" + struct_name + "\");\n")
+ out_c.write("\t*res_ptr = " + struct_name + "_init(env, _a, o")
+ for var_line in field_var_lines:
+ if var_line.group(1) in trait_structs:
+ out_c.write(", " + var_line.group(2))
+ out_c.write(");\n")
+ out_c.write("\treturn (long)res_ptr;\n")
+ out_c.write("}\n")
+
+ out_java.write("\tpublic static native " + struct_name + " " + struct_name + "_get_obj_from_jcalls(long val);\n")
+ out_c.write("JNIEXPORT jobject JNICALL Java_org_ldk_impl_bindings_" + struct_name.replace("_", "_1") + "_1get_1obj_1from_1jcalls (JNIEnv * env, jclass _a, jlong val) {\n")
+ out_c.write("\treturn ((" + struct_name + "_JCalls*)val)->o;\n")
+ out_c.write("}\n")
+
+ for fn_line in trait_fn_lines:
+ # For now, just disable enabling the _call_log - we don't know how to inverse-map String
+ is_log = fn_line.group(2) == "log" and struct_name == "LDKLogger"
+ if fn_line.group(2) != "free" and fn_line.group(2) != "clone" and fn_line.group(2) != "eq" and not is_log:
+ dummy_line = fn_line.group(1) + struct_name + "_call_" + fn_line.group(2) + " " + struct_name + "* arg" + fn_line.group(4) + "\n"
+ map_fn(dummy_line, re.compile("([A-Za-z_0-9]*) *([A-Za-z_0-9]*) *(.*)").match(dummy_line), None, "(arg_conv->" + fn_line.group(2) + ")(arg_conv->this_arg")
+
+ out_java.write("""package org.ldk.impl;
public class bindings {
static {
- System.loadLibrary(\"lightning\");
+ System.loadLibrary(\"lightningjni\");
+ init(java.lang.Enum.class);
}
+""")
+ out_c.write("""#include \"org_ldk_impl_bindings.h\"
+#include <rust_types.h>
+#include <lightning.h>
+#include <string.h>
+#include <stdatomic.h>
+""")
+
+ if sys.argv[4] == "false":
+ out_c.write("#define MALLOC(a, _) malloc(a)\n")
+ out_c.write("#define FREE free\n")
+ out_c.write("#define DO_ASSERT(a) (void)(a)\n")
+ else:
+ out_c.write("""#include <assert.h>
+#define DO_ASSERT(a) do { bool _assert_val = (a); assert(_assert_val); } while(0)
+
+#include <threads.h>
+static mtx_t allocation_mtx;
+
+void __attribute__((constructor)) init_mtx() {
+ DO_ASSERT(mtx_init(&allocation_mtx, mtx_plain) == thrd_success);
+}
+
+typedef struct allocation {
+ struct allocation* next;
+ void* ptr;
+ const char* struct_name;
+} allocation;
+static allocation* allocation_ll = NULL;
+
+void* MALLOC(size_t len, const char* struct_name) {
+ void* res = malloc(len);
+ allocation* new_alloc = malloc(sizeof(allocation));
+ new_alloc->ptr = res;
+ new_alloc->struct_name = struct_name;
+ DO_ASSERT(mtx_lock(&allocation_mtx) == thrd_success);
+ new_alloc->next = allocation_ll;
+ allocation_ll = new_alloc;
+ DO_ASSERT(mtx_unlock(&allocation_mtx) == thrd_success);
+ return res;
+}
+
+void FREE(void* ptr) {
+ allocation* p = NULL;
+ DO_ASSERT(mtx_lock(&allocation_mtx) == thrd_success);
+ allocation* it = allocation_ll;
+ while (it->ptr != ptr) { p = it; it = it->next; }
+ if (p) { p->next = it->next; } else { allocation_ll = it->next; }
+ DO_ASSERT(mtx_unlock(&allocation_mtx) == thrd_success);
+ DO_ASSERT(it->ptr == ptr);
+ free(it);
+ free(ptr);
+}
+
+void __attribute__((destructor)) check_leaks() {
+ for (allocation* a = allocation_ll; a != NULL; a = a->next) { fprintf(stderr, "%s %p remains\\n", a->struct_name, a->ptr); }
+ DO_ASSERT(allocation_ll == NULL);
+}
+""")
+
+ out_java.write("""
+ static native void init(java.lang.Class c);
+
+ public static native boolean deref_bool(long ptr);
+ public static native long deref_long(long ptr);
+ public static native void free_heap_ptr(long ptr);
+ public static native byte[] get_u8_slice_bytes(long slice_ptr);
+ public static native long bytes_to_u8_vec(byte[] bytes);
+ public static native long u8_vec_len(long vec);
+
+""")
+ out_c.write("""
+jmethodID ordinal_meth = NULL;
+JNIEXPORT void Java_org_ldk_impl_bindings_init(JNIEnv * env, jclass _b, jclass enum_class) {
+ ordinal_meth = (*env)->GetMethodID(env, enum_class, "ordinal", "()I");
+ DO_ASSERT(ordinal_meth != NULL);
+}
+
+JNIEXPORT jboolean JNICALL Java_org_ldk_impl_bindings_deref_1bool (JNIEnv * env, jclass _a, jlong ptr) {
+ return *((bool*)ptr);
+}
+JNIEXPORT jlong JNICALL Java_org_ldk_impl_bindings_deref_1long (JNIEnv * env, jclass _a, jlong ptr) {
+ return *((long*)ptr);
+}
+JNIEXPORT void JNICALL Java_org_ldk_impl_bindings_free_1heap_1ptr (JNIEnv * env, jclass _a, jlong ptr) {
+ FREE((void*)ptr);
+}
+JNIEXPORT jbyteArray JNICALL Java_org_ldk_impl_bindings_get_1u8_1slice_1bytes (JNIEnv * _env, jclass _b, jlong slice_ptr) {
+ LDKu8slice *slice = (LDKu8slice*)slice_ptr;
+ jbyteArray ret_arr = (*_env)->NewByteArray(_env, slice->datalen);
+ (*_env)->SetByteArrayRegion(_env, ret_arr, 0, slice->datalen, slice->data);
+ return ret_arr;
+}
+JNIEXPORT long JNICALL Java_org_ldk_impl_bindings_bytes_1to_1u8_1vec (JNIEnv * _env, jclass _b, jbyteArray bytes) {
+ LDKCVec_u8Z *vec = (LDKCVec_u8Z*)MALLOC(sizeof(LDKCVec_u8Z), "LDKCVec_u8");
+ vec->datalen = (*_env)->GetArrayLength(_env, bytes);
+ vec->data = (uint8_t*)malloc(vec->datalen); // May be freed by rust, so don't track allocation
+ (*_env)->GetByteArrayRegion (_env, bytes, 0, vec->datalen, vec->data);
+ return (long)vec;
+}
+JNIEXPORT jlong JNICALL Java_org_ldk_impl_bindings_u8_1vec_1len (JNIEnv * env, jclass _a, jlong ptr) {
+ LDKCVec_u8Z *vec = (LDKCVec_u8Z*)ptr;
+ return (long)vec->datalen;
+}
+
+// We assume that CVec_u8Z and u8slice are the same size and layout (and thus pointers to the two can be mixed)
+_Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKu8slice), "Vec<u8> and [u8] need to have been mapped identically");
+_Static_assert(offsetof(LDKCVec_u8Z, data) == offsetof(LDKu8slice, data), "Vec<u8> and [u8] need to have been mapped identically");
+_Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKu8slice, datalen), "Vec<u8> and [u8] need to have been mapped identically");
""")
+ # XXX: Temporarily write out a manual SecretKey_new() for testing, we should auto-gen this kind of thing
+ out_java.write("\tpublic static native long LDKSecretKey_new();\n\n") # TODO: rm me
+ out_c.write("JNIEXPORT jlong JNICALL Java_org_ldk_impl_bindings_LDKSecretKey_1new(JNIEnv * _env, jclass _b) {\n") # TODO: rm me
+ out_c.write("\tLDKSecretKey* key = (LDKSecretKey*)MALLOC(sizeof(LDKSecretKey), \"LDKSecretKey\");\n") # TODO: rm me
+ out_c.write("\treturn (long)key;\n") # TODO: rm me
+ out_c.write("}\n") # TODO: rm me
+
in_block_comment = False
- in_block_enum = False
- in_block_struct = False
- in_block_union = False
+ cur_block_obj = None
fn_ptr_regex = re.compile("^extern const ([A-Za-z_0-9\* ]*) \(\*(.*)\)\((.*)\);$")
- fn_ret_arr_regex = re.compile("(.*) \(\*(.*)\((.*)\)\)\[.*\];$")
- reg_fn_regex = re.compile("([A-Za-z_0-9\* ]*) \*?([a-zA-Z_0-9]*)\((.*)\);$")
+ fn_ret_arr_regex = re.compile("(.*) \(\*(.*)\((.*)\)\)\[([0-9]*)\];$")
+ reg_fn_regex = re.compile("([A-Za-z_0-9\* ]* \*?)([a-zA-Z_0-9]*)\((.*)\);$")
+ const_val_regex = re.compile("^extern const ([A-Za-z_0-9]*) ([A-Za-z_0-9]*);$")
+
+ line_indicates_result_regex = re.compile("^ bool result_ok;$")
+ line_indicates_opaque_regex = re.compile("^ bool is_owned;$")
+ line_indicates_trait_regex = re.compile("^ ([A-Za-z_0-9]* \*?)\(\*([A-Za-z_0-9]*)\)\((const )?void \*this_arg(.*)\);$")
+ assert(line_indicates_trait_regex.match(" uintptr_t (*send_data)(void *this_arg, LDKu8slice data, bool resume_read);"))
+ assert(line_indicates_trait_regex.match(" LDKCVec_MessageSendEventZ (*get_and_clear_pending_msg_events)(const void *this_arg);"))
+ assert(line_indicates_trait_regex.match(" void *(*clone)(const void *this_arg);"))
+ line_field_var_regex = re.compile("^ ([A-Za-z_0-9]*) ([A-Za-z_0-9]*);$")
+ assert(line_field_var_regex.match(" LDKMessageSendEventsProvider MessageSendEventsProvider;"))
+ struct_name_regex = re.compile("^typedef (struct|enum|union) (MUST_USE_STRUCT )?(LDK[A-Za-z_0-9]*) {$")
+ assert(struct_name_regex.match("typedef struct LDKCVecTempl_u8 {"))
+ assert(struct_name_regex.match("typedef enum LDKNetwork {"))
+ struct_alias_regex = re.compile("^typedef (LDK[A-Za-z_0-9]*) (LDK[A-Za-z_0-9]*);$")
+ assert(struct_alias_regex.match("typedef LDKCResultTempl_bool__PeerHandleError LDKCResult_boolPeerHandleErrorZ;"))
- for line in f:
+ result_templ_structs = set()
+ for line in in_h:
if in_block_comment:
- #out_f.write("\t" + line)
+ #out_java.write("\t" + line)
if line.endswith("*/\n"):
in_block_comment = False
- elif in_block_struct:
- if line.startswith("} "):
- in_block_struct = False
- elif in_block_union:
- if line.startswith("} "):
- in_block_union = False
- elif in_block_enum:
+ elif cur_block_obj is not None:
+ cur_block_obj = cur_block_obj + line
if line.startswith("} "):
- in_block_enum = False
+ field_lines = []
+ struct_name = None
+ obj_lines = cur_block_obj.split("\n")
+ is_opaque = False
+ is_result = False
+ is_unitary_enum = False
+ is_union_enum = False
+ is_union = False
+ trait_fn_lines = []
+ field_var_lines = []
+
+ for idx, struct_line in enumerate(obj_lines):
+ if struct_line.strip().startswith("/*"):
+ in_block_comment = True
+ if in_block_comment:
+ if struct_line.endswith("*/"):
+ in_block_comment = False
+ else:
+ struct_name_match = struct_name_regex.match(struct_line)
+ if struct_name_match is not None:
+ struct_name = struct_name_match.group(3)
+ if struct_name_match.group(1) == "enum":
+ if not struct_name.endswith("_Tag"):
+ is_unitary_enum = True
+ else:
+ is_union_enum = True
+ elif struct_name_match.group(1) == "union":
+ is_union = True
+ if line_indicates_opaque_regex.match(struct_line):
+ is_opaque = True
+ elif line_indicates_result_regex.match(struct_line):
+ is_result = True
+ trait_fn_match = line_indicates_trait_regex.match(struct_line)
+ if trait_fn_match is not None:
+ trait_fn_lines.append(trait_fn_match)
+ field_var_match = line_field_var_regex.match(struct_line)
+ if field_var_match is not None:
+ field_var_lines.append(field_var_match)
+ field_lines.append(struct_line)
+
+ assert(struct_name is not None)
+ assert(len(trait_fn_lines) == 0 or not (is_opaque or is_unitary_enum or is_union_enum or is_union))
+ assert(not is_opaque or not (len(trait_fn_lines) != 0 or is_unitary_enum or is_union_enum or is_union))
+ assert(not is_unitary_enum or not (len(trait_fn_lines) != 0 or is_opaque or is_union_enum or is_union))
+ assert(not is_union_enum or not (len(trait_fn_lines) != 0 or is_unitary_enum or is_opaque or is_union))
+ assert(not is_union or not (len(trait_fn_lines) != 0 or is_unitary_enum or is_union_enum or is_opaque))
+ if is_opaque:
+ opaque_structs.add(struct_name)
+ elif is_result:
+ result_templ_structs.add(struct_name)
+ elif is_unitary_enum:
+ unitary_enums.add(struct_name)
+ out_c.write("static inline " + struct_name + " " + struct_name + "_from_java(JNIEnv *env, jclass val) {\n")
+ out_c.write("\tswitch ((*env)->CallIntMethod(env, val, ordinal_meth)) {\n")
+ ord_v = 0
+ for idx, struct_line in enumerate(field_lines):
+ if idx == 0:
+ out_java.write("\tpublic enum " + struct_name + " {\n")
+ elif idx == len(field_lines) - 3:
+ assert(struct_line.endswith("_Sentinel,"))
+ elif idx == len(field_lines) - 2:
+ out_java.write("\t}\n")
+ elif idx == len(field_lines) - 1:
+ assert(struct_line == "")
+ else:
+ out_java.write("\t" + struct_line + "\n")
+ out_c.write("\t\tcase %d: return %s;\n" % (ord_v, struct_line.strip().strip(",")))
+ ord_v = ord_v + 1
+ out_c.write("\t}\n")
+ out_c.write("\tabort();\n")
+ out_c.write("}\n")
+
+ ord_v = 0
+ out_c.write("static inline jclass " + struct_name + "_to_java(JNIEnv *env, " + struct_name + " val) {\n")
+ out_c.write("\t// TODO: This is pretty inefficient, we really need to cache the field IDs and class\n")
+ out_c.write("\tjclass enum_class = (*env)->FindClass(env, \"Lorg/ldk/impl/bindings$" + struct_name + ";\");\n")
+ out_c.write("\tDO_ASSERT(enum_class != NULL);\n")
+ out_c.write("\tswitch (val) {\n")
+ for idx, struct_line in enumerate(field_lines):
+ if idx > 0 and idx < len(field_lines) - 3:
+ variant = struct_line.strip().strip(",")
+ out_c.write("\t\tcase " + variant + ": {\n")
+ out_c.write("\t\t\tjfieldID field = (*env)->GetStaticFieldID(env, enum_class, \"" + variant + "\", \"Lorg/ldk/impl/bindings$" + struct_name + ";\");\n")
+ out_c.write("\t\t\tDO_ASSERT(field != NULL);\n")
+ out_c.write("\t\t\treturn (*env)->GetStaticObjectField(env, enum_class, field);\n")
+ out_c.write("\t\t}\n")
+ ord_v = ord_v + 1
+ out_c.write("\t\tdefault: abort();\n")
+ out_c.write("\t}\n")
+ out_c.write("}\n\n")
+ elif len(trait_fn_lines) > 0:
+ trait_structs.add(struct_name)
+ map_trait(struct_name, field_var_lines, trait_fn_lines)
+ cur_block_obj = None
else:
fn_ptr = fn_ptr_regex.match(line)
fn_ret_arr = fn_ret_arr_regex.match(line)
reg_fn = reg_fn_regex.match(line)
+ const_val = const_val_regex.match(line)
if line.startswith("#include <"):
pass
elif line.startswith("/*"):
- #out_f.write("\t" + line)
+ #out_java.write("\t" + line)
if not line.endswith("*/\n"):
in_block_comment = True
elif line.startswith("typedef enum "):
- in_block_enum = True
+ cur_block_obj = line
elif line.startswith("typedef struct "):
- in_block_struct = True
+ cur_block_obj = line
elif line.startswith("typedef union "):
- in_block_union = True
+ cur_block_obj = line
elif line.startswith("typedef "):
+ alias_match = struct_alias_regex.match(line)
+ if alias_match.group(1) in result_templ_structs:
+ out_java.write("\tpublic static native boolean " + alias_match.group(2) + "_result_ok(long arg);\n")
+ out_java.write("\tpublic static native long " + alias_match.group(2) + "_get_inner(long arg);\n")
+ out_c.write("JNIEXPORT jboolean JNICALL Java_org_ldk_impl_bindings_" + alias_match.group(2).replace("_", "_1") + "_1result_1ok (JNIEnv * env, jclass _a, jlong arg) {\n")
+ out_c.write("\treturn ((" + alias_match.group(2) + "*)arg)->result_ok;\n")
+ out_c.write("}\n")
+ out_c.write("JNIEXPORT jlong JNICALL Java_org_ldk_impl_bindings_" + alias_match.group(2).replace("_", "_1") + "_1get_1inner (JNIEnv * env, jclass _a, jlong arg) {\n")
+ out_c.write("\tif (((" + alias_match.group(2) + "*)arg)->result_ok) {\n")
+ out_c.write("\t\treturn (long)((" + alias_match.group(2) + "*)arg)->contents.result;\n")
+ out_c.write("\t} else {\n")
+ out_c.write("\t\treturn (long)((" + alias_match.group(2) + "*)arg)->contents.err;\n")
+ out_c.write("\t}\n}\n")
pass
elif fn_ptr is not None:
- map_fn(fn_ptr, "")
+ map_fn(line, fn_ptr, None, None)
elif fn_ret_arr is not None:
- map_fn(fn_ret_arr, "[]")
+ map_fn(line, fn_ret_arr, fn_ret_arr.group(4), None)
elif reg_fn is not None:
- map_fn(reg_fn, "")
+ map_fn(line, reg_fn, None, None)
+ elif const_val_regex is not None:
+ # TODO Map const variables
+ pass
else:
assert(line == "\n")
- out_f.write("}\n");
+ out_java.write("}\n")
projects / ldk-java / blobdiff