#!/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) != 4:
+ print("USAGE: /path/to/lightning.h /path/to/bindings/output.java /path/to/bindings/output.c")
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):
+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()
+
+ 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:]
if fn_arg.startswith("const "):
fn_arg = fn_arg[6:]
+
+ 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_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_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_arg = fn_arg[7:].strip()
+ elif fn_arg.startswith("uint16_t"):
+ java_ty = "short"
+ c_ty = "jshort"
+ fn_arg = fn_arg[8:].strip()
elif fn_arg.startswith("uint32_t"):
- out_f.write("int")
- fn_arg = fn_arg.strip("uint32_t ")
+ java_ty = "int"
+ c_ty = "jint"
+ fn_arg = fn_arg[8:].strip()
elif fn_arg.startswith("uint64_t"):
- out_f.write("long")
- fn_arg = fn_arg.strip("uint64_t ")
+ java_ty = "long"
+ c_ty = "jlong"
+ fn_arg = fn_arg[8:].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)
+ java_ty = "long"
+ c_ty = "jlong"
+ 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"
+
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)
+ java_ty = java_ty + "[]"
+ c_ty = c_ty + "Array"
+ if var_is_arr is not None:
+ return (None, java_ty, c_ty, is_ptr, False, var_is_arr.group(1), var_is_arr.group(2))
+ return (rust_obj, java_ty, c_ty, is_ptr or take_by_ptr, is_ptr, fn_arg, None)
+
+ class TypeInfo:
+ def __init__(self, c_ty, java_ty, arg_name, arg_conv, arg_conv_name, ret_conv, ret_conv_name):
+ assert(c_ty is not None)
+ assert(java_ty is not None)
+ assert(arg_name is not None)
+ self.c_ty = c_ty
+ self.java_ty = java_ty
+ 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")
+
+ def map_type(fn_arg, print_void, ret_arr_len, is_free):
+ (is_ptr_to_obj, java_ty, c_ty, is_ptr, rust_takes_ptr, var_name, arr_len) = java_c_types(fn_arg, ret_arr_len)
+ if c_ty == "void":
+ if not print_void:
+ return TypeInfo(c_ty = c_ty, java_ty = java_ty, arg_name = var_name,
+ arg_conv = None, arg_conv_name = None, ret_conv = None, ret_conv_name = None)
+
+ if c_ty.endswith("Array"):
+ if arr_len is not None:
+ arr_name = var_name
+ else:
+ arr_name = "ret"
+ arr_len = ret_arr_len
+ assert(c_ty == "jbyteArray")
+ return TypeInfo(c_ty = c_ty, java_ty = java_ty, arg_name = 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 = (c_ty + " " + 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 var_name != "":
+ # If we have a parameter name, print it (noting that it may indicate its a pointer)
+ if is_ptr_to_obj is not None:
+ assert(is_ptr)
+ if not rust_takes_ptr:
+ base_conv = is_ptr_to_obj + " " + var_name + "_conv = *(" + is_ptr_to_obj + "*)" + var_name + ";\nfree((void*)" + var_name + ");";
+ if is_ptr_to_obj in opaque_structs:
+ return TypeInfo(c_ty = c_ty, java_ty = java_ty, arg_name = var_name,
+ arg_conv = base_conv + "\n" + var_name + "_conv._underlying_ref = false;",
+ arg_conv_name = var_name + "_conv",
+ ret_conv = None, ret_conv_name = None)
+ return TypeInfo(c_ty = c_ty, java_ty = java_ty, arg_name = var_name,
+ arg_conv = base_conv, arg_conv_name = var_name + "_conv",
+ ret_conv = None, ret_conv_name = None)
+ else:
+ assert(not is_free)
+ return TypeInfo(c_ty = c_ty, java_ty = java_ty, arg_name = var_name,
+ arg_conv = is_ptr_to_obj + "* " + var_name + "_conv = (" + is_ptr_to_obj + "*)" + var_name + ";",
+ arg_conv_name = var_name + "_conv",
+ ret_conv = None, ret_conv_name = None)
+ elif rust_takes_ptr:
+ return TypeInfo(c_ty = c_ty, java_ty = java_ty, arg_name = var_name,
+ arg_conv = None, arg_conv_name = var_name, ret_conv = None, ret_conv_name = None)
+ else:
+ return TypeInfo(c_ty = c_ty, java_ty = java_ty, arg_name = var_name,
+ arg_conv = None, arg_conv_name = 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 is_ptr_to_obj is not None:
+ assert(not is_free or is_ptr_to_obj not in opaque_structs);
+ return TypeInfo(c_ty = c_ty, java_ty = java_ty, arg_name = var_name,
+ arg_conv = is_ptr_to_obj + " arg_conv = *(" + is_ptr_to_obj + "*)arg;\nfree((void*)arg);",
+ arg_conv_name = "arg_conv",
+ ret_conv = None, ret_conv_name = None)
+ else:
+ assert(not is_free)
+ return TypeInfo(c_ty = c_ty, java_ty = java_ty, arg_name = 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 is_ptr_to_obj is not None:
+ if not rust_takes_ptr:
+ if is_ptr_to_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 TypeInfo(c_ty = c_ty, java_ty = java_ty, arg_name = var_name,
+ ret_conv = (is_ptr_to_obj + "* ret = malloc(sizeof(" + is_ptr_to_obj + "));\n*ret = ", ";\nassert(!ret->_underlying_ref);\nret->_underlying_ref = true;"),
+ ret_conv_name = "(long)ret",
+ arg_conv = None, arg_conv_name = None)
+ else:
+ return TypeInfo(c_ty = c_ty, java_ty = java_ty, arg_name = var_name,
+ ret_conv = (is_ptr_to_obj + "* ret = malloc(sizeof(" + is_ptr_to_obj + "));\n*ret = ", ";"),
+ ret_conv_name = "(long)ret",
+ arg_conv = None, arg_conv_name = None)
+ else:
+ return TypeInfo(c_ty = c_ty, java_ty = java_ty, arg_name = var_name,
+ ret_conv = ("long ret = (long)", ";"), ret_conv_name = "ret",
+ arg_conv = None, arg_conv_name = None)
+ else:
+ return TypeInfo(c_ty = c_ty, java_ty = java_ty, arg_name = var_name,
+ arg_conv = None, arg_conv_name = None, ret_conv = None, ret_conv_name = None)
+
+ def map_fn(re_match, ret_arr_len):
+ 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
+
+ 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")
- def map_fn_args(fn_args):
- for idx, arg in enumerate(fn_args.split(',')):
+ 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)
- 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")
+ out_java.write(");\n")
+ out_c.write(") {\n")
- out_f.write("""package org.ldk;
+ 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 ");
+
+ out_c.write(re_match.group(2) + "(")
+ for idx, info in enumerate(arg_names):
+ if info.arg_conv_name is not None:
+ if idx != 0:
+ out_c.write(", ")
+ 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")
+
+ out_java.write("""package org.ldk.impl;
public class bindings {
static {
- System.loadLibrary(\"lightning\");
+ System.loadLibrary(\"lightningjni\");
}
""")
+ out_c.write("#include \"org_ldk_impl_bindings.h\"\n")
+ out_c.write("#include <rust_types.h>\n")
+ out_c.write("#include <lightning.h>\n")
+ out_c.write("#include <assert.h>\n\n")
+ out_c.write("#include <string.h>\n\n")
in_block_comment = False
in_block_enum = False
- in_block_struct = False
+ cur_block_struct = None
in_block_union = False
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]*)\((.*)\);$")
+ const_val_regex = re.compile("^extern const ([A-Za-z_0-9]*) ([A-Za-z_0-9]*);$")
- for line in f:
+ line_indicates_opaque_regex = re.compile("^ bool _underlying_ref;$")
+ line_indicates_trait_regex = re.compile("^ ([A-Za-z_0-9]* \*?)\(\*([A-Za-z_0-9]*)\)\((const )?void \*this_arg(.*)\);$")
+ assert(line_indicates_trait_regex.match(" uintptr_t (*send_data)(void *this_arg, LDKu8slice data, bool resume_read);"))
+ assert(line_indicates_trait_regex.match(" LDKCVec_MessageSendEventZ (*get_and_clear_pending_msg_events)(const void *this_arg);"))
+ assert(line_indicates_trait_regex.match(" void *(*clone)(const void *this_arg);"))
+ struct_name_regex = re.compile("^typedef struct (MUST_USE_STRUCT )?(LDK[A-Za-z_0-9]*) {$")
+ assert(struct_name_regex.match("typedef struct LDKCVecTempl_u8 {"))
+
+ 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:
+ elif cur_block_struct is not None:
+ cur_block_struct = cur_block_struct + line
if line.startswith("} "):
- in_block_struct = False
+ field_lines = []
+ struct_name = None
+ struct_lines = cur_block_struct.split("\n")
+ is_opaque = False
+ trait_fn_lines = []
+
+ for idx, struct_line in enumerate(struct_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(2)
+ if line_indicates_opaque_regex.match(struct_line):
+ is_opaque = 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_lines.append(struct_line)
+
+ assert(struct_name is not None)
+ assert(len(trait_fn_lines) == 0 or not is_opaque)
+ if is_opaque:
+ opaque_structs.add(struct_name)
+ if len(trait_fn_lines) > 0:
+ out_c.write("typedef struct " + struct_name + "_JCalls {\n")
+ out_c.write("\tJNIEnv *env;\n")
+ out_c.write("\tjobject o;\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")
+ for fn_line in trait_fn_lines:
+ if fn_line.group(2) != "free" and fn_line.group(2) != "clone":
+ (_, java_ty, c_ty, is_ptr, _, _, _) = java_c_types(fn_line.group(1), None)
+
+ out_java.write("\t\t " + 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)
+
+ out_java.write(");\n")
+ out_c.write(") {\n")
+ out_c.write("\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\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", "j_calls->env"));
+ out_c.write(arg_info.arg_name)
+ out_c.write(arg_info.ret_conv[1].replace('\n', '\n\t').replace("_env", "j_calls->env") + "\n")
+
+ if not is_ptr:
+ out_c.write("\treturn (*j_calls->env)->Call" + java_ty.title() + "Method(j_calls->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() + "*)(*j_calls->env)->CallLongMethod(j_calls->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 is_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("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("\t(*j_calls->env)->DeleteGlobalRef(j_calls->env, j_calls->o);\n")
+ out_c.write("\tfree(j_calls);\n")
+ out_c.write("}\n")
+ elif fn_line.group(2) == "clone":
+ out_c.write("void* " + struct_name + "_JCalls_clone(const void* this_arg) {\n")
+ out_c.write("\t" + struct_name + "_JCalls *ret = malloc(sizeof(" + struct_name + "_JCalls));\n")
+ out_c.write("\tmemcpy(ret, this_arg, sizeof(" + struct_name + "_JCalls));\n")
+ out_c.write("\treturn ret;\n")
+ out_c.write("}\n")
+ out_java.write("\t}\n")
+ out_java.write("\tpublic static native long " + struct_name + "_new(" + struct_name + " impl);\n")
+
+ out_c.write("JNIEXPORT long JNICALL Java_org_ldk_impl_bindings_" + struct_name.replace("_", "_1") + "_1new (JNIEnv * env, jclass _a, jobject o) {\n")
+ out_c.write("\tjclass c = (*env)->GetObjectClass(env, o);\n")
+ out_c.write("\tassert(c != NULL);\n")
+ out_c.write("\t" + struct_name + "_JCalls *calls = malloc(sizeof(" + struct_name + "_JCalls));\n")
+ out_c.write("\tcalls->env = env;\n")
+ out_c.write("\tcalls->o = (*env)->NewGlobalRef(env, o);\n")
+ for fn_line in trait_fn_lines:
+ 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) + "\", \"" + "TODO" + "\");\n")
+ out_c.write("\tassert(calls->" + fn_line.group(2) + "_meth != NULL);\n")
+ out_c.write("\n\t" + struct_name + " *ret = malloc(sizeof(" + struct_name + "));\n")
+ out_c.write("\tret->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("\tret->" + fn_line.group(2) + " = " + fn_line.group(2) + "_jcall;\n")
+ elif fn_line.group(2) == "free":
+ out_c.write("\tret->free = " + struct_name + "_JCalls_free;\n")
+ else:
+ out_c.write("\tret->clone = " + struct_name + "_JCalls_clone;\n")
+ out_c.write("\treturn (long)ret;\n")
+ out_c.write("}\n\n")
+
+ #out_java.write("/* " + "\n".join(field_lines) + "*/\n")
+ cur_block_struct = None
elif in_block_union:
if line.startswith("} "):
in_block_union = False
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
elif line.startswith("typedef struct "):
- in_block_struct = True
+ cur_block_struct = line
elif line.startswith("typedef union "):
in_block_union = True
elif line.startswith("typedef "):
pass
elif fn_ptr is not None:
- map_fn(fn_ptr, "")
+ map_fn(fn_ptr, None)
elif fn_ret_arr is not None:
- map_fn(fn_ret_arr, "[]")
+ map_fn(fn_ret_arr, fn_ret_arr.group(4))
elif reg_fn is not None:
- map_fn(reg_fn, "")
+ map_fn(reg_fn, 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