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wireshark/epan/wslua/wslua_internals.c

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/*
* wslua_internals.c
*
* Wireshark's interface to the Lua Programming Language
*
* This file is for internal WSLUA functions - not ones exposed into Lua.
*
* (c) 2013, Hadriel Kaplan <hadrielk@yahoo.com>
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "config.h"
#include "wslua.h"
#include <stdio.h>
/* Several implementation details (__getters, __setters, __methods) were exposed
* to Lua code. These are normally not used by dissectors, just for debugging
* (and the "wslua global" test). Enable by setting WSLUA_WITH_INTROSPECTION */
#define WSLUA_WITH_INTROSPECTION
#if LUA_VERSION_NUM == 501
/* Compatibility with Lua 5.1, function was added in 5.2 */
static
int lua_absindex(lua_State *L, int idx) {
return (idx > 0 || idx <= LUA_REGISTRYINDEX)
? idx
: lua_gettop(L) + 1 + idx;
}
#endif
WSLUA_API int wslua__concat(lua_State* L) {
/* Concatenate two objects to a string */
if (!luaL_callmeta(L,1,"__tostring"))
lua_pushvalue(L,1);
if (!luaL_callmeta(L,2,"__tostring"))
lua_pushvalue(L,2);
lua_concat(L,2);
return 1;
}
/* like lua_toboolean, except only coerces int, nil, and bool, and errors on other types.
note that normal lua_toboolean returns 1 for any Lua value different from false and
nil; otherwise it returns 0. So a string would give a 0, as would a number of 1.
This function errors if the arg is a string, and sets the boolean to 1 for any
number other than 0. Like toboolean, this returns FALSE if the arg was missing. */
WSLUA_API gboolean wslua_toboolean(lua_State* L, int n) {
gboolean val = FALSE;
if ( lua_isboolean(L,n) || lua_isnil(L,n) || lua_gettop(L) < n ) {
val = lua_toboolean(L,n);
} else if ( lua_type(L,n) == LUA_TNUMBER ) {
int num = (int)luaL_checkinteger(L,n);
val = num != 0 ? TRUE : FALSE;
} else {
luaL_argerror(L,n,"must be a boolean or number");
}
return val;
}
/* like luaL_checkinteger, except for booleans - this does not coerce other types */
WSLUA_API gboolean wslua_checkboolean(lua_State* L, int n) {
if (!lua_isboolean(L,n) ) {
luaL_argerror(L,n,"must be a boolean");
}
return lua_toboolean(L,n);;
}
WSLUA_API gboolean wslua_optbool(lua_State* L, int n, gboolean def) {
gboolean val = FALSE;
if ( lua_isboolean(L,n) ) {
val = lua_toboolean(L,n);
} else if ( lua_isnil(L,n) || lua_gettop(L) < n ){
val = def;
} else {
luaL_argerror(L,n,"must be a boolean");
}
return val;
}
/* like lua_tointeger, except only coerces int, nil, and bool, and errors on other types.
note that normal lua_tointeger does not coerce nil or bool, but does coerce strings. */
WSLUA_API lua_Integer wslua_tointeger(lua_State* L, int n) {
lua_Integer val = 0;
if ( lua_type(L,n) == LUA_TNUMBER) {
val = lua_tointeger(L,n);
} else if ( lua_isboolean(L,n) ) {
val = (lua_Integer) (lua_toboolean(L,n));
} else if ( lua_isnil(L,n) ) {
val = 0;
} else {
luaL_argerror(L,n,"must be a integer, boolean or nil");
}
return val;
}
/* like luaL_optint, except converts/handles Lua booleans as well */
WSLUA_API int wslua_optboolint(lua_State* L, int n, int def) {
int val = 0;
if ( lua_isnumber(L,n) ) {
val = (int)lua_tointeger(L,n);
} else if ( lua_isboolean(L,n) ) {
val = lua_toboolean(L,n) ? 1 : 0;
} else if ( lua_isnil(L,n) || lua_gettop(L) < n ){
val = def;
} else {
luaL_argerror(L,n,"must be a boolean or integer");
}
return val;
}
/* like luaL_checklstring, except no coercion */
WSLUA_API const char* wslua_checklstring_only(lua_State* L, int n, size_t *l) {
if (lua_type(L,n) != LUA_TSTRING) {
luaL_argerror(L,n,"must be a Lua string");
}
return luaL_checklstring(L, n, l);
}
/* like luaL_checkstring, except no coercion */
WSLUA_API const char* wslua_checkstring_only(lua_State* L, int n) {
return wslua_checklstring_only(L, n, NULL);
}
/* following is based on the luaL_setfuncs() from Lua 5.2, so we can use it in pre-5.2 */
WSLUA_API void wslua_setfuncs(lua_State *L, const luaL_Reg *l, int nup) {
luaL_checkstack(L, nup, "too many upvalues");
for (; l->name != NULL; l++) { /* fill the table with given functions */
int i;
for (i = 0; i < nup; i++) /* copy upvalues to the top */
lua_pushvalue(L, -nup);
lua_pushcclosure(L, l->func, nup); /* closure with those upvalues */
lua_setfield(L, -(nup + 2), l->name);
}
lua_pop(L, nup); /* remove upvalues */
}
/**
* Identical to lua_getfield, but without triggering the __newindex metamethod.
* The resulting value is returned on the Lua stack.
*/
static void lua_rawgetfield(lua_State *L, int idx, const char *k) {
idx = lua_absindex(L, idx);
lua_pushstring(L, k);
lua_rawget(L, idx);
}
/**
* Identical to lua_setfield, but without triggering the __newindex metamethod.
* The value to be set is taken from the Lua stack.
*/
static void lua_rawsetfield (lua_State *L, int idx, const char *k) {
idx = lua_absindex(L, idx);
lua_pushstring(L, k);
lua_insert(L, -2);
lua_rawset(L, idx);
}
WSLUA_API void wslua_print_stack(char* s, lua_State* L) {
int i;
for (i=1;i<=lua_gettop(L);i++) {
printf("%s-%i: %s\n",s,i,lua_typename (L,lua_type(L, i)));
}
printf("\n");
}
/* C-code function equivalent of the typeof() function we created in Lua.
* The Lua one is for Lua scripts to use, this one is for C-code to use.
*/
const gchar* wslua_typeof_unknown = "UNKNOWN";
const gchar* wslua_typeof(lua_State *L, int idx) {
const gchar *classname = wslua_typeof_unknown;
/* we'll try getting the class name for error reporting*/
if (luaL_getmetafield(L, idx, WSLUA_TYPEOF_FIELD)) {
classname = luaL_optstring(L, -1, wslua_typeof_unknown);
lua_pop(L,1); /* pop __typeof result */
}
else if (lua_type(L,idx) == LUA_TTABLE) {
lua_rawgetfield(L, idx, WSLUA_TYPEOF_FIELD);
classname = luaL_optstring(L, -1, wslua_typeof_unknown);
lua_pop(L,1); /* pop __typeof result */
}
return classname;
}
/* this gets a Lua table of the given name, from the table at the given
* location idx. If it does not get a table, it pops whatever it got
* and returns false.
*/
gboolean wslua_get_table(lua_State *L, int idx, const gchar *name) {
gboolean result = TRUE;
lua_rawgetfield(L, idx, name);
if (!lua_istable(L,-1)) {
lua_pop(L,1);
result = FALSE;
}
return result;
}
/* this gets a table field of the given name, from the table at the given
* location idx. If it does not get a field, it pops whatever it got
* and returns false.
*/
gboolean wslua_get_field(lua_State *L, int idx, const gchar *name) {
gboolean result = TRUE;
lua_rawgetfield(L, idx, name);
if (lua_isnil(L,-1)) {
lua_pop(L,1);
result = FALSE;
}
return result;
}
/**
* The __index metamethod for classes. Expected upvalues: class name.
*/
static int wslua_classmeta_index(lua_State *L) {
const char *fieldname = luaL_checkstring(L, 2);
const char *classname = luaL_checkstring(L, lua_upvalueindex(1));
return luaL_error(L, "No such '%s' function/property for object type '%s'", fieldname, classname);
}
/**
* The __index/__newindex metamethod for class instances. Expected upvalues:
* class name, getters/getters, __index/__newindex class instance metamethod,
* class methods (getters only). See wslua_register_classinstance_meta.
*
* It first tries to find an attribute getter/setter, then an instance method
* (getters only), then the __index/__newindex metamethod of the class instance
* metatable and finally it gives up with an error.
*
* Getters are invoked with the table as parameter. Setters are invoked with the
* table and the value as parameter.
*/
static int wslua_instancemeta_index_impl(lua_State *L, gboolean is_getter)
{
const char *fieldname = luaL_checkstring(L, 2);
const int attr_idx = lua_upvalueindex(2);
const int fallback_idx = lua_upvalueindex(3);
const int methods_idx = lua_upvalueindex(4);
/* Check for getter/setter */
if (lua_istable(L, attr_idx)) {
lua_rawgetfield(L, attr_idx, fieldname);
if (lua_iscfunction(L, -1)) {
lua_CFunction cfunc = lua_tocfunction(L, -1);
lua_pop(L, 1); /* Remove cfunction from stack */
lua_remove(L, 2); /* Remove key from stack */
/*
* Note: This re-uses the current closure as optimization, exposing
* its upvalues via pseudo-indices. The alternative is to create a
* new C closure (via lua_call), but this is more expensive.
* Callees should not rely on the availability of the upvalues.
*/
return (*cfunc)(L);
}
}
/* If this is a getter, and the getter has methods, try them. */
if (is_getter && lua_istable(L, methods_idx)) {
lua_rawgetfield(L, methods_idx, fieldname);
if (!lua_isnil(L, -1)) {
/* Return method from methods table. */
return 1;
}
lua_pop(L, 1); /* Remove nil from stack. */
}
/* Use function from the class instance metatable (if any). */
if (lua_iscfunction(L, fallback_idx)) {
lua_CFunction cfunc = lua_tocfunction(L, fallback_idx);
/* Note, unlike getters/setters functions, the key must be preserved! */
return (*cfunc)(L);
}
const char *classname = luaL_checkstring(L, lua_upvalueindex(1));
return luaL_error(L, "No such '%s' method/field for object type '%s'", fieldname, classname);
}
static int wslua_instancemeta_index(lua_State *L)
{
return wslua_instancemeta_index_impl(L, TRUE);
}
static int wslua_instancemeta_newindex(lua_State *L)
{
return wslua_instancemeta_index_impl(L, FALSE);
}
/* Pushes a hex string of the binary data argument. */
int wslua_bin2hex(lua_State* L, const guint8* data, const guint len, const gboolean lowercase, const gchar* sep) {
luaL_Buffer b;
guint i = 0;
static const char byte_to_str_upper[256][3] = {
"00","01","02","03","04","05","06","07","08","09","0A","0B","0C","0D","0E","0F",
"10","11","12","13","14","15","16","17","18","19","1A","1B","1C","1D","1E","1F",
"20","21","22","23","24","25","26","27","28","29","2A","2B","2C","2D","2E","2F",
"30","31","32","33","34","35","36","37","38","39","3A","3B","3C","3D","3E","3F",
"40","41","42","43","44","45","46","47","48","49","4A","4B","4C","4D","4E","4F",
"50","51","52","53","54","55","56","57","58","59","5A","5B","5C","5D","5E","5F",
"60","61","62","63","64","65","66","67","68","69","6A","6B","6C","6D","6E","6F",
"70","71","72","73","74","75","76","77","78","79","7A","7B","7C","7D","7E","7F",
"80","81","82","83","84","85","86","87","88","89","8A","8B","8C","8D","8E","8F",
"90","91","92","93","94","95","96","97","98","99","9A","9B","9C","9D","9E","9F",
"A0","A1","A2","A3","A4","A5","A6","A7","A8","A9","AA","AB","AC","AD","AE","AF",
"B0","B1","B2","B3","B4","B5","B6","B7","B8","B9","BA","BB","BC","BD","BE","BF",
"C0","C1","C2","C3","C4","C5","C6","C7","C8","C9","CA","CB","CC","CD","CE","CF",
"D0","D1","D2","D3","D4","D5","D6","D7","D8","D9","DA","DB","DC","DD","DE","DF",
"E0","E1","E2","E3","E4","E5","E6","E7","E8","E9","EA","EB","EC","ED","EE","EF",
"F0","F1","F2","F3","F4","F5","F6","F7","F8","F9","FA","FB","FC","FD","FE","FF"
};
static const char byte_to_str_lower[256][3] = {
"00","01","02","03","04","05","06","07","08","09","0a","0b","0c","0d","0e","0f",
"10","11","12","13","14","15","16","17","18","19","1a","1b","1c","1d","1e","1f",
"20","21","22","23","24","25","26","27","28","29","2a","2b","2c","2d","2e","2f",
"30","31","32","33","34","35","36","37","38","39","3a","3b","3c","3d","3e","3f",
"40","41","42","43","44","45","46","47","48","49","4a","4b","4c","4d","4e","4f",
"50","51","52","53","54","55","56","57","58","59","5a","5b","5c","5d","5e","5f",
"60","61","62","63","64","65","66","67","68","69","6a","6b","6c","6d","6e","6f",
"70","71","72","73","74","75","76","77","78","79","7a","7b","7c","7d","7e","7f",
"80","81","82","83","84","85","86","87","88","89","8a","8b","8c","8d","8e","8f",
"90","91","92","93","94","95","96","97","98","99","9a","9b","9c","9d","9e","9f",
"a0","a1","a2","a3","a4","a5","a6","a7","a8","a9","aa","ab","ac","ad","ae","af",
"b0","b1","b2","b3","b4","b5","b6","b7","b8","b9","ba","bb","bc","bd","be","bf",
"c0","c1","c2","c3","c4","c5","c6","c7","c8","c9","ca","cb","cc","cd","ce","cf",
"d0","d1","d2","d3","d4","d5","d6","d7","d8","d9","da","db","dc","dd","de","df",
"e0","e1","e2","e3","e4","e5","e6","e7","e8","e9","ea","eb","ec","ed","ee","ef",
"f0","f1","f2","f3","f4","f5","f6","f7","f8","f9","fa","fb","fc","fd","fe","ff"
};
const char (*byte_to_str)[3] = byte_to_str_upper;
const guint last = len - 1;
if (lowercase) byte_to_str = byte_to_str_lower;
luaL_buffinit(L, &b);
for (i = 0; i < len; i++) {
luaL_addlstring(&b, &(*byte_to_str[data[i]]), 2);
if (sep && i < last) luaL_addstring(&b, sep);
}
luaL_pushresult(&b);
return 1;
}
/* Pushes a binary string of the hex-ascii data argument. */
int wslua_hex2bin(lua_State* L, const char* data, const guint len, const gchar* sep) {
luaL_Buffer b;
guint i = 0;
guint seplen = 0;
gint8 c, d;
static const gint8 str_to_nibble[256] = {
-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
0, 1, 2, 3, 4, 5, 6, 7, 8, 9,-1,-1,-1,-1,-1,-1,
-1,10,11,12,13,14,15,-1,-1,-1,-1,-1,-1,-1,-1,-1,
-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
-1,10,11,12,13,14,15,-1,-1,-1,-1,-1,-1,-1,-1,-1,
-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1
};
if (sep) seplen = (guint) strlen(sep);
luaL_buffinit(L, &b);
for (i = 0; i < len;) {
c = str_to_nibble[(guchar)data[i]];
if (c < 0) {
if (seplen && strncmp(&data[i], sep, seplen) == 0) {
i += seplen;
continue;
} else {
break;
}
}
d = str_to_nibble[(guchar)data[++i]];
if (d < 0) break;
luaL_addchar(&b, (c * 16) + d);
i++;
}
luaL_pushresult(&b);
return 1;
}
/**
* Creates a table of getters/setters and pushes it on the Lua stack.
*
* Additionally, a sanity check is performed to detect colliding getters/setters
* and method names.
*/
static void wslua_push_attributes(lua_State *L, const wslua_attribute_table *t, gboolean is_getter, int methods_idx)
{
if (!t) {
/* No property accessors? Nothing to do. */
//lua_pushnil(L);
lua_newtable(L); /* wslua_reg_attributes requires a table for the moment. */
return;
}
/* If there is a methods table, prepare for a collission check. */
if (lua_istable(L, methods_idx)) {
methods_idx = lua_absindex(L, methods_idx);
} else {
methods_idx = 0;
}
lua_newtable(L);
/* Fill the getter/setter table with given functions. */
for (; t->fieldname != NULL; t++) {
lua_CFunction cfunc = is_getter ? t->getfunc : t->setfunc;
if (cfunc) {
/* if there's a previous methods table, make sure this attribute name doesn't collide */
if (methods_idx) {
lua_rawgetfield(L, methods_idx, t->fieldname);
if (!lua_isnil(L, -1)) {
ws_error("'%s' attribute name already exists as method name for class\n", t->fieldname);
}
lua_pop(L,1); /* pop the nil */
}
lua_pushcfunction(L, cfunc);
lua_rawsetfield(L, -2, t->fieldname);
}
}
}
/**
* Registers the metatable for class instances. See the documentation of
* wslua_register_class for the exact metatable.
*/
void wslua_register_classinstance_meta(lua_State *L, const wslua_class *cls_def)
{
/* Register metatable for use by class instances. STACK = { MT } */
/* NOTE: The name can be changed as long as luaL_checkudata is also adapted */
luaL_newmetatable(L, cls_def->name);
if (cls_def->instance_meta) {
wslua_setfuncs(L, cls_def->instance_meta, 0);
}
/* Set the __typeof attribute to the class name (for use by "typeof" in Lua code). */
lua_pushstring(L, cls_def->name);
lua_rawsetfield(L, -2, WSLUA_TYPEOF_FIELD);
/* Create table to store method names. STACK = { MT, methods } */
if (cls_def->instance_methods) {
lua_newtable(L);
wslua_setfuncs(L, cls_def->instance_methods, 0);
} else {
lua_pushnil(L);
}
/* Prepare __index method on metatable. */
lua_pushstring(L, cls_def->name); /* upval 1: class name */
wslua_push_attributes(L, cls_def->attrs, TRUE, -2); /* upval 2: getters table */
#ifdef WSLUA_WITH_INTROSPECTION
lua_pushvalue(L, -1);
lua_rawsetfield(L, -5, "__getters"); /* set (transition) property on mt, remove later! */
#endif
lua_rawgetfield(L, -4, "__index"); /* upval 3: fallback __index method from metatable */
lua_pushvalue(L, -4); /* upval 4: class methods table */
lua_pushcclosure(L, wslua_instancemeta_index, 4);
lua_rawsetfield(L, -3, "__index");
/* Prepare __newindex method on metatable. */
lua_pushstring(L, cls_def->name); /* upval 1: class name */
wslua_push_attributes(L, cls_def->attrs, FALSE, -2); /* upval 2: setters table */
#ifdef WSLUA_WITH_INTROSPECTION
lua_pushvalue(L, -1);
lua_rawsetfield(L, -5, "__setters"); /* set (transition) property on mt, remove later! */
#endif
lua_rawgetfield(L, -4, "__newindex"); /* upval 3: fallback __newindex method from metatable */
lua_pushcclosure(L, wslua_instancemeta_newindex, 3);
lua_rawsetfield(L, -3, "__newindex");
/* Pop metatable + methods table. STACK = { } */
lua_pop(L, 2);
}
/**
* Registers a new class for use in Lua with the specified properties. The
* metatable for the class instance is internally registered with the given
* name.
*
* This functions basically creates a class (type table) with this structure:
*
* Class = { class_methods }
* Class.__typeof = "Class" -- NOTE: Might be removed in future
* Class.__metatable = { class_meta }
* Class.__metatable.__typeof = "Class" -- NOTE: Might be removed in future
* Class.__metatable.__index = function_that_errors_out
* Class.__metatable.__newindex = function_that_errors_out
*
* It also registers another metatable for class instances (type userdata):
*
* mt = { instance_meta }
* mt.__typeof = "Class"
* -- will be passed upvalues (see wslua_instancemeta_index_impl).
* mt.__index = function_that_finds_right_property_or_method_getter
* mt.__newindex = function_thaon_that_finds_right_property_or_method_setter
*
* For backwards compatibility, introspection is still possible (this detail
* might be removed in the future though, do not rely on this!):
*
* Class.__metatable.__methods = Class
* Class.__metatable.__getters = { __typeof = "getter", getter_attrs }
* Class.__metatable.__setters = { __typeof = "setter", setter_attrs }
*/
void wslua_register_class(lua_State *L, const wslua_class *cls_def)
{
/* Check for existing global variables/classes with the same name. */
lua_getglobal(L, cls_def->name);
if (!lua_isnil (L, -1)) {
ws_error("Attempt to register class '%s' which already exists in global Lua table\n", cls_def->name);
}
lua_pop(L, 1);
/* Create new table for class. STACK = { table } */
lua_newtable(L);
if (cls_def->class_methods) {
wslua_setfuncs(L, cls_def->class_methods, 0);
}
#ifdef WSLUA_WITH_INTROSPECTION
/* Set __typeof to the class name, used by wslua_typeof. Might be removed in
* the future as the type can already be determined from the metatable. */
lua_pushstring(L, cls_def->name);
lua_rawsetfield(L, -2, WSLUA_TYPEOF_FIELD);
#endif
/* Create new metatable for class. STACK = { table, CLASSMT } */
lua_newtable(L);
if (cls_def->class_meta) {
/* Set metamethods on metatable for class. */
wslua_setfuncs(L, cls_def->class_meta, 0);
}
#ifdef WSLUA_WITH_INTROSPECTION
/* Set __typeof to the class name. Might be removed in the future, a "class"
* is not of the type "(name of class)", instead it is of type "class".
* Instances of this class should be of type "(name of class)". */
lua_pushstring(L, cls_def->name);
lua_rawsetfield(L, -2, WSLUA_TYPEOF_FIELD);
#endif
/* For backwards compatibility, error out when a non-existing property is being accessed. */
lua_pushstring(L, cls_def->name);
lua_pushcclosure(L, wslua_classmeta_index, 1);
lua_rawsetfield(L, -2, "__index");
/* Prevent properties from being set on classes. Previously this was always
* forbidden for classes with attributes (such as Listener), this extends
* the restriction to all classes. */
lua_pushstring(L, cls_def->name);
lua_pushcclosure(L, wslua_classmeta_index, 1);
lua_rawsetfield(L, -2, "__newindex");
/* Set metatable on class. STACK = { table } */
lua_setmetatable(L, -2);
wslua_register_classinstance_meta(L, cls_def);
#ifdef WSLUA_WITH_INTROSPECTION
/* XXX remove these? It looks like an internal implementation detail that is
* no longer needed but is added here to pass the wslua tests (API check) */
lua_getmetatable(L, -1); /* Stack = { table, CLASSMT } */
luaL_getmetatable(L, cls_def->name); /* Stack = { table, CLASSMT, MT } */
lua_rawgetfield(L, -1, "__getters"); /* __getters from instance MT */
lua_pushstring(L, "getter");
lua_rawsetfield(L, -2, WSLUA_TYPEOF_FIELD);
lua_rawsetfield(L, -3, "__getters"); /* Set property on class MT */
lua_rawgetfield(L, -1, "__setters"); /* setters from instance MT */
lua_pushstring(L, "setter");
lua_rawsetfield(L, -2, WSLUA_TYPEOF_FIELD);
lua_rawsetfield(L, -3, "__setters"); /* Set property on class MT */
lua_pop(L, 1); /* Stack = { table, CLASSMT } */
lua_pushvalue(L, -2);
lua_rawsetfield(L, -2, "__methods"); /* CLASSMT.__methods = Class */
lua_pop(L, 1); /* Stack = { table } */
#endif
/* Set the class methods table as global name. STACK = { } */
lua_setglobal(L, cls_def->name);
}
/*
* Editor modelines - https://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 4
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* vi: set shiftwidth=4 tabstop=8 expandtab:
* :indentSize=4:tabSize=8:noTabs=true:
*/
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