#!/usr/bin/env python3
import sys, re
-if len(sys.argv) != 5:
- print("USAGE: /path/to/lightning.h /path/to/bindings/output.java /path/to/bindings/output.c debug")
+if len(sys.argv) != 6:
+ print("USAGE: /path/to/lightning.h /path/to/bindings/output.java /path/to/bindings/enums/ /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)
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:
+with open(sys.argv[1]) as in_h, open(sys.argv[2], "w") as out_java, open(sys.argv[4], "w") as out_c:
opaque_structs = set()
trait_structs = set()
unitary_enums = set()
- var_is_arr_regex = re.compile("\(\*([A-za-z_]*)\)\[([0-9]*)\]")
+ def camel_to_snake(s):
+ # Convert camel case to snake case, in a way that appears to match cbindgen
+ con = "_"
+ ret = ""
+ lastchar = ""
+ lastund = False
+ for char in s:
+ if lastchar.isupper():
+ if not char.isupper() and not lastund:
+ ret = ret + "_"
+ lastund = True
+ else:
+ lastund = False
+ ret = ret + lastchar.lower()
+ else:
+ ret = ret + lastchar
+ if char.isupper() and not lastund:
+ ret = ret + "_"
+ lastund = True
+ else:
+ lastund = False
+ lastchar = char
+ if char.isnumeric():
+ lastund = True
+ return (ret + lastchar.lower()).strip("_")
+
+ var_is_arr_regex = re.compile("\(\*([A-za-z0-9_]*)\)\[([0-9]*)\]")
var_ty_regex = re.compile("([A-za-z_0-9]*)(.*)")
def java_c_types(fn_arg, ret_arr_len):
fn_arg = fn_arg.strip()
is_ptr = False
take_by_ptr = False
rust_obj = None
+ if fn_arg.startswith("LDKThirtyTwoBytes"):
+ fn_arg = "uint8_t (*" + fn_arg[18:] + ")[32]"
+ assert var_is_arr_regex.match(fn_arg[8:])
+ rust_obj = "LDKThirtyTwoBytes"
+
if fn_arg.startswith("void"):
java_ty = "void"
c_ty = "void"
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_ty_arg = "Lorg/ldk/enums/" + ma.group(1).strip() + ";"
fn_arg = ma.group(2).strip()
rust_obj = ma.group(1).strip()
take_by_ptr = True
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,
+ return TypeInfo(rust_obj=rust_obj, 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)
arr_name = "ret"
arr_len = ret_arr_len
assert(ty_info.c_ty == "jbyteArray")
+ if ty_info.rust_obj is not None:
+ arg_conv = ty_info.rust_obj + " " + arr_name + "_ref;\n" + "(*_env)->GetByteArrayRegion (_env, """ + arr_name + ", 0, " + arr_len + ", " + arr_name + "_ref.data);"
+ arr_access = ("", ".data")
+ else:
+ 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;"
+ arr_access = ("*", "")
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 = arg_conv,
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 + ", *",
- ");"),
+ "(*_env)->SetByteArrayRegion(_env, " + arr_name + "_arr, 0, " + arr_len + ", " + arr_access[0],
+ arr_access[1] + ");"),
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)
out_c.write(";")
out_c.write("\n}\n\n")
+ def map_unitary_enum(struct_name, field_lines):
+ with open(sys.argv[3] + "/" + struct_name + ".java", "w") as out_java_enum:
+ out_java_enum.write("package org.ldk.enums;\n\n")
+ 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_enum.write("public enum " + struct_name + " {\n")
+ elif idx == len(field_lines) - 3:
+ assert(struct_line.endswith("_Sentinel,"))
+ elif idx == len(field_lines) - 2:
+ out_java_enum.write("\t; static native void init();\n")
+ out_java_enum.write("\tstatic { init(); }\n")
+ out_java_enum.write("}")
+ out_java.write("\tstatic { " + struct_name + ".values(); /* Force enum statics to run */ }\n")
+ elif idx == len(field_lines) - 1:
+ assert(struct_line == "")
+ else:
+ out_java_enum.write(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 jclass " + struct_name + "_class = NULL;\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("static jfieldID " + struct_name + "_" + variant + " = NULL;\n")
+ out_c.write("JNIEXPORT void JNICALL Java_org_ldk_enums_" + struct_name.replace("_", "_1") + "_init (JNIEnv * env, jclass clz) {\n")
+ out_c.write("\t" + struct_name + "_class = (*env)->NewGlobalRef(env, clz);\n")
+ out_c.write("\tDO_ASSERT(" + struct_name + "_class != NULL);\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" + struct_name + "_" + variant + " = (*env)->GetStaticFieldID(env, " + struct_name + "_class, \"" + variant + "\", \"Lorg/ldk/enums/" + struct_name + ";\");\n")
+ out_c.write("\tDO_ASSERT(" + struct_name + "_" + variant + " != NULL);\n")
+ out_c.write("}\n")
+ out_c.write("static inline jclass " + struct_name + "_to_java(JNIEnv *env, " + struct_name + " val) {\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\treturn (*env)->GetStaticObjectField(env, " + struct_name + "_class, " + struct_name + "_" + variant + ");\n")
+ ord_v = ord_v + 1
+ out_c.write("\t\tdefault: abort();\n")
+ out_c.write("\t}\n")
+ out_c.write("}\n\n")
+
+ def map_complex_enum(struct_name, union_enum_items):
+ tag_field_lines = union_enum_items["field_lines"]
+ init_meth_jty_strs = {}
+ for idx, struct_line in enumerate(tag_field_lines):
+ if idx == 0:
+ out_java.write("\tpublic static class " + struct_name + " {\n")
+ out_java.write("\t\tprivate " + struct_name + "() {}\n")
+ elif idx == len(tag_field_lines) - 3:
+ assert(struct_line.endswith("_Sentinel,"))
+ elif idx == len(tag_field_lines) - 2:
+ out_java.write("\t\tstatic native void init();\n")
+ out_java.write("\t}\n")
+ elif idx == len(tag_field_lines) - 1:
+ assert(struct_line == "")
+ else:
+ var_name = struct_line.strip(' ,')[len(struct_name) + 1:]
+ out_java.write("\t\tpublic final static class " + var_name + " extends " + struct_name + " {\n")
+ out_c.write("static jclass " + struct_name + "_" + var_name + "_class = NULL;\n")
+ out_c.write("static jmethodID " + struct_name + "_" + var_name + "_meth = NULL;\n")
+ init_meth_jty_str = ""
+ init_meth_params = ""
+ init_meth_body = ""
+ if "LDK" + var_name in union_enum_items:
+ enum_var_lines = union_enum_items["LDK" + var_name]
+ for idx, field in enumerate(enum_var_lines):
+ if idx != 0 and idx < len(enum_var_lines) - 2:
+ field_ty = java_c_types(field.strip(' ;'), None)
+ out_java.write("\t\t\tpublic " + field_ty.java_ty + " " + field_ty.var_name + ";\n")
+ init_meth_jty_str = init_meth_jty_str + field_ty.java_fn_ty_arg
+ if idx > 1:
+ init_meth_params = init_meth_params + ", "
+ init_meth_params = init_meth_params + field_ty.java_ty + " " + field_ty.var_name
+ init_meth_body = init_meth_body + "this." + field_ty.var_name + " = " + field_ty.var_name + "; "
+ out_java.write("\t\t\t" + var_name + "(" + init_meth_params + ") { ")
+ out_java.write(init_meth_body)
+ out_java.write("}\n")
+ out_java.write("\t\t}\n")
+ init_meth_jty_strs[var_name] = init_meth_jty_str
+ out_java.write("\tstatic { " + struct_name + ".init(); }\n")
+ out_java.write("\tpublic static native " + struct_name + " " + struct_name + "_ref_from_ptr(long ptr);\n");
+
+ out_c.write("JNIEXPORT void JNICALL Java_org_ldk_impl_bindings_00024" + struct_name.replace("_", "_1") + "_init (JNIEnv * env, jclass _a) {\n")
+ for idx, struct_line in enumerate(tag_field_lines):
+ if idx != 0 and idx < len(tag_field_lines) - 3:
+ var_name = struct_line.strip(' ,')[len(struct_name) + 1:]
+ out_c.write("\t" + struct_name + "_" + var_name + "_class =\n")
+ out_c.write("\t\t(*env)->NewGlobalRef(env, (*env)->FindClass(env, \"Lorg/ldk/impl/bindings$" + struct_name + "$" + var_name + ";\"));\n")
+ out_c.write("\tDO_ASSERT(" + struct_name + "_" + var_name + "_class != NULL);\n")
+ out_c.write("\t" + struct_name + "_" + var_name + "_meth = (*env)->GetMethodID(env, " + struct_name + "_" + var_name + "_class, \"<init>\", \"(" + init_meth_jty_strs[var_name] + ")V\");\n")
+ out_c.write("\tDO_ASSERT(" + struct_name + "_" + var_name + "_meth != NULL);\n")
+ out_c.write("}\n")
+ out_c.write("JNIEXPORT jobject JNICALL Java_org_ldk_impl_bindings_" + struct_name.replace("_", "_1") + "_1ref_1from_1ptr (JNIEnv * env, jclass _c, jlong ptr) {\n")
+ out_c.write("\t" + struct_name + " *obj = (" + struct_name + "*)ptr;\n")
+ out_c.write("\tswitch(obj->tag) {\n")
+ for idx, struct_line in enumerate(tag_field_lines):
+ if idx != 0 and idx < len(tag_field_lines) - 3:
+ var_name = struct_line.strip(' ,')[len(struct_name) + 1:]
+ out_c.write("\t\tcase " + struct_name + "_" + var_name + ": {\n")
+ c_params_text = ""
+ if "LDK" + var_name in union_enum_items:
+ enum_var_lines = union_enum_items["LDK" + var_name]
+ for idx, field in enumerate(enum_var_lines):
+ if idx != 0 and idx < len(enum_var_lines) - 2:
+ field_map = map_type(field.strip(' ;'), False, None, False)
+ if field_map.ret_conv is not None:
+ out_c.write("\t\t\t" + field_map.ret_conv[0].replace("\n", "\n\t\t\t").replace("_env", "env"))
+ out_c.write("obj->" + camel_to_snake(var_name) + "." + field_map.arg_name)
+ out_c.write(field_map.ret_conv[1] + "\n")
+ c_params_text = c_params_text + ", " + field_map.ret_conv_name
+ else:
+ c_params_text = c_params_text + ", obj->" + camel_to_snake(var_name) + "." + field_map.arg_name
+ out_c.write("\t\t\treturn (*env)->NewObject(env, " + struct_name + "_" + var_name + "_class, " + struct_name + "_" + var_name + "_meth" + c_params_text + ");\n")
+ out_c.write("\t\t}\n")
+ out_c.write("\t\tdefault: abort();\n")
+ out_c.write("\t}\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(arg_info.arg_name)
out_c.write(arg_info.ret_conv[1].replace('\n', '\n\t').replace("_env", "env") + "\n")
- if not ret_ty_info.passed_as_ptr:
+ if ret_ty_info.c_ty.endswith("Array"):
+ assert(ret_ty_info.c_ty == "jbyteArray")
+ out_c.write("\tjbyteArray jret = (*env)->CallObjectMethod(env, j_calls->o, j_calls->" + fn_line.group(2) + "_meth")
+ elif 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");
else:
out_c.write(", " + arg_info.arg_name)
out_c.write(");\n");
+ if ret_ty_info.c_ty.endswith("Array"):
+ out_c.write("\tLDKThirtyTwoBytes ret;\n")
+ out_c.write("\t(*env)->GetByteArrayRegion(env, jret, 0, " + ret_ty_info.arr_len + ", ret.data);\n")
+ out_c.write("\treturn ret;\n")
if ret_ty_info.passed_as_ptr:
out_c.write("\t" + fn_line.group(1).strip() + " res = *ret;\n")
} allocation;
static allocation* allocation_ll = NULL;
-void* MALLOC(size_t len, const char* struct_name) {
+static void* MALLOC(size_t len, const char* struct_name) {
void* res = malloc(len);
allocation* new_alloc = malloc(sizeof(allocation));
new_alloc->ptr = res;
return res;
}
-void FREE(void* ptr) {
+static void FREE(void* ptr) {
allocation* p = NULL;
DO_ASSERT(mtx_lock(&allocation_mtx) == thrd_success);
allocation* it = allocation_ll;
}
""")
out_java.write("""package org.ldk.impl;
+import org.ldk.enums.*;
public class bindings {
public static class VecOrSliceDef {
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[] read_bytes(long ptr, long len);
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 vec_slice_len(long vec);
""")
out_c.write("""
-jmethodID ordinal_meth = NULL;
-jmethodID slicedef_meth = NULL;
-jclass slicedef_cls = NULL;
+static jmethodID ordinal_meth = NULL;
+static jmethodID slicedef_meth = NULL;
+static jclass slicedef_cls = NULL;
JNIEXPORT void Java_org_ldk_impl_bindings_init(JNIEnv * env, jclass _b, jclass enum_class, jclass slicedef_class) {
ordinal_meth = (*env)->GetMethodID(env, enum_class, "ordinal", "()I");
DO_ASSERT(ordinal_meth != NULL);
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_read_1bytes (JNIEnv * _env, jclass _b, jlong ptr, jlong len) {
+ jbyteArray ret_arr = (*_env)->NewByteArray(_env, len);
+ (*_env)->SetByteArrayRegion(_env, ret_arr, 0, len, (unsigned char*)ptr);
+ return ret_arr;
+}
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);
assert(struct_alias_regex.match("typedef LDKCResultTempl_bool__PeerHandleError LDKCResult_boolPeerHandleErrorZ;"))
result_templ_structs = set()
+ union_enum_items = {}
for line in in_h:
if in_block_comment:
#out_java.write("\t" + line)
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))
+ assert(len(trait_fn_lines) == 0 or not (is_opaque or is_unitary_enum or is_union_enum or is_union or is_result or vec_ty is not None))
+ assert(not is_opaque or not (len(trait_fn_lines) != 0 or is_unitary_enum or is_union_enum or is_union or is_result or vec_ty is not None))
+ assert(not is_unitary_enum or not (len(trait_fn_lines) != 0 or is_opaque or is_union_enum or is_union or is_result or vec_ty is not None))
+ assert(not is_union_enum or not (len(trait_fn_lines) != 0 or is_unitary_enum or is_opaque or is_union or is_result or vec_ty is not None))
+ assert(not is_union or not (len(trait_fn_lines) != 0 or is_unitary_enum or is_union_enum or is_opaque or is_result or vec_ty is not None))
+ assert(not is_result or not (len(trait_fn_lines) != 0 or is_unitary_enum or is_union_enum or is_opaque or is_union or vec_ty is not None))
+ assert(vec_ty is None or not (len(trait_fn_lines) != 0 or is_unitary_enum or is_union_enum or is_opaque or is_union or is_result))
+
if is_opaque:
opaque_structs.add(struct_name)
out_java.write("\tpublic static native long " + struct_name + "_optional_none();\n")
out_c.write("\t" + struct_name + " *vec = (" + struct_name + "*)ptr;\n")
out_c.write("\treturn (*env)->NewObject(env, slicedef_cls, slicedef_meth, (long)vec->data, (long)vec->datalen, sizeof(" + vec_ty + "));\n")
out_c.write("}\n")
+ elif is_union_enum:
+ assert(struct_name.endswith("_Tag"))
+ struct_name = struct_name[:-4]
+ union_enum_items[struct_name] = {"field_lines": field_lines}
+ elif struct_name.endswith("_Body") and struct_name.split("_")[0] in union_enum_items:
+ enum_var_name = struct_name.split("_")
+ union_enum_items[enum_var_name[0]][enum_var_name[1]] = field_lines
+ elif struct_name in union_enum_items:
+ map_complex_enum(struct_name, union_enum_items[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")
+ map_unitary_enum(struct_name, field_lines)
elif len(trait_fn_lines) > 0:
trait_structs.add(struct_name)
map_trait(struct_name, field_var_lines, trait_fn_lines)