1 files changed, 112 insertions, 0 deletions
diff --git a/epan/wslua/make-reg.py b/epan/wslua/make-reg.py
new file mode 100755
index 0000000000..b8ae77b3b5
--- /dev/null
+++ b/epan/wslua/make-reg.py
@@ -0,0 +1,112 @@
+#!/usr/bin/env python3
+#
+# make-reg.py
+# Registration Macros Generator
+#
+# Copyright 2022 by Moshe Kaplan
+# Based on make-reg.pl by Luis E. Garcia Onatnon <luis.ontanon@gmail.com>
+#
+# Wireshark - Network traffic analyzer
+# By Gerald Combs <gerald@wireshark.org>
+# Copyright 1998 Gerald Combs
+#
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+import argparse
+import re
+
+
+def parse_file(file_content):
+    # extract classes, functions, and internal functions
+    # and return them as a tuple
+    CLASS_PATTERN = r'WSLUA_CLASS_DEFINE(?:_BASE)?\050\s*([A-Za-z0-9]+)'
+    FUNCTION_PATTERN = r'WSLUA_FUNCTION\s+wslua_([a-z_0-9]+)'
+    INTERNAL_FUNCTION_PATTERN = r'WSLUA_INTERNAL_FUNCTION\s+wslua_([a-z_0-9]+)'
+
+    class_matches = re.findall(CLASS_PATTERN, file_content)
+    function_matches = re.findall(FUNCTION_PATTERN, file_content)
+    internal_function_matches = re.findall(INTERNAL_FUNCTION_PATTERN, file_content)
+    return class_matches, function_matches, internal_function_matches
+
+
+def generate_declare_wslua_h(classes, functions, internal_functions):
+    output_lines = []
+    output_lines += ["/* This file is automatically generated by make-reg.py; do not edit! */\n"]
+    output_lines += ["#define WSLUA_DECLARE_CLASSES() \\"]
+    for lua_class in classes:
+        output_lines += ["\tWSLUA_CLASS_DECLARE({lua_class});\\".format(lua_class=lua_class)]
+
+    output_lines += ["\n"]
+    output_lines += ["#define WSLUA_DECLARE_FUNCTIONS() \\"]
+    for lua_function in functions:
+        output_lines += ["\tWSLUA_FUNCTION wslua_{lua_function}(lua_State* L);\\".format(lua_function=lua_function)]
+
+    for lua_internal_function in internal_functions:
+        output_lines += ["\tWSLUA_INTERNAL_FUNCTION wslua_{lua_internal_function}(lua_State* L);\\".format(lua_internal_function=lua_internal_function)]
+
+    output_lines += ["\n"]
+    output_lines += ["extern void wslua_register_classes(lua_State* L);"]
+    output_lines += ["extern void wslua_register_functions(lua_State* L);"]
+    output_lines += ["\n\n"]
+    return "\n".join(output_lines)
+
+
+def generate_register_wslua_c(classes, functions, internal_functions):
+    output_lines = []
+    output_lines += ["/* This file is automatically generated by make-reg.py; do not edit! */\n"]
+    output_lines += ['#include "config.h"']
+    output_lines += ['#include "wslua.h"\n']
+    output_lines += ['#include "lua_bitop.h"\n']
+    output_lines += ["static void wslua_reg_module(lua_State* L, const char *name _U_, lua_CFunction func) {"]
+    output_lines += ["\tlua_pushcfunction(L, func);"]
+    output_lines += ["\tlua_call(L, 0, 0);"]
+    output_lines += ["}\n"]
+    output_lines += ["void wslua_register_classes(lua_State* L) {"]
+    for lua_class in classes:
+        output_lines += ["\twslua_reg_module(L, \"{lua_class}\", {lua_class}_register);".format(lua_class=lua_class)]
+
+    output_lines += ["\twslua_reg_module(L, \"bit\", luaopen_bit);"]
+    output_lines += ["\tlua_pushcfunction(L, luaopen_rex_pcre2);"]
+    output_lines += ["\tlua_call(L, 0, 1);"]
+    output_lines += ["\tlua_setglobal(L, \"rex_pcre2\");"]
+    output_lines += ["}\n"]
+
+    output_lines += ["void wslua_register_functions(lua_State* L) {"]
+    for lua_function in functions:
+        output_lines += ["\tWSLUA_REGISTER_FUNCTION({lua_function});".format(lua_function=lua_function)]
+
+    for lua_internal_function in internal_functions:
+        output_lines += ["\tWSLUA_REGISTER_FUNCTION({lua_internal_function});".format(lua_internal_function=lua_internal_function)]
+
+    output_lines += ["}\n"]
+
+    return "\n".join(output_lines)
+
+
+def main():
+    parser = argparse.ArgumentParser(description="Generate the registration macros for Lua code.")
+    parser.add_argument("files", metavar='files', nargs='+', help="paths to Lua C code")
+    parsed_args = parser.parse_args()
+
+    lua_classes = []
+    lua_functions = []
+    lua_internal_functions = []
+    for filename in parsed_args.files:
+        with open(filename, encoding='utf-8') as fh:
+            class_matches, function_matches, internal_function_matches = parse_file(fh.read())
+        lua_classes += class_matches
+        lua_functions += function_matches
+        lua_internal_functions += internal_function_matches
+
+    declare_wslua_h_content = generate_declare_wslua_h(lua_classes, lua_functions, lua_internal_functions)
+    register_wslua_c_content = generate_register_wslua_c(lua_classes, lua_functions, lua_internal_functions)
+
+    with open('register_wslua.c', mode='w', encoding='utf-8') as fh:
+        fh.write(register_wslua_c_content)
+
+    with open('declare_wslua.h', mode='w', encoding='utf-8') as fh:
+        fh.write(declare_wslua_h_content)
+
+
+if __name__ == '__main__':
+    main()