2 -- Copyright (C) 2008-2010 Matthew Wild
3 -- Copyright (C) 2008-2010 Waqas Hussain
5 -- This project is MIT/X11 licensed. Please see the
6 -- COPYING file in the source package for more information.
12 * Windows support functions for Lua
22 static int Lget_nameservers(lua_State *L) {
23 char stack_buffer[1024]; // stack allocated buffer
24 IP4_ARRAY* ips = (IP4_ARRAY*) stack_buffer;
25 DWORD len = sizeof(stack_buffer);
28 status = DnsQueryConfig(DnsConfigDnsServerList, FALSE, NULL, NULL, ips, &len);
31 lua_createtable(L, ips->AddrCount, 0);
32 for (i = 0; i < ips->AddrCount; i++) {
33 DWORD ip = ips->AddrArray[i];
35 sprintf_s(ip_str, sizeof(ip_str), "%d.%d.%d.%d", (ip >> 0) & 255, (ip >> 8) & 255, (ip >> 16) & 255, (ip >> 24) & 255);
36 lua_pushstring(L, ip_str);
37 lua_rawseti(L, -2, i+1);
41 luaL_error(L, "DnsQueryConfig returned %d", status);
42 return 0; // unreachable, but prevents a compiler warning
46 static void lassert(lua_State *L, BOOL test, char* string) {
48 luaL_error(L, "%s: %d", string, GetLastError());
52 static int Lget_consolecolor(lua_State *L) {
53 HWND console = GetStdHandle(STD_OUTPUT_HANDLE);
54 WORD color; DWORD read_len;
56 CONSOLE_SCREEN_BUFFER_INFO info;
58 lassert(L, console != INVALID_HANDLE_VALUE, "GetStdHandle");
59 lassert(L, GetConsoleScreenBufferInfo(console, &info), "GetConsoleScreenBufferInfo");
60 lassert(L, ReadConsoleOutputAttribute(console, &color, sizeof(WORD), info.dwCursorPosition, &read_len), "ReadConsoleOutputAttribute");
62 lua_pushnumber(L, color);
65 static int Lset_consolecolor(lua_State *L) {
66 int color = luaL_checkint(L, 1);
67 HWND console = GetStdHandle(STD_OUTPUT_HANDLE);
68 lassert(L, console != INVALID_HANDLE_VALUE, "GetStdHandle");
69 lassert(L, SetConsoleTextAttribute(console, color), "SetConsoleTextAttribute");
73 static const luaL_Reg Reg[] =
75 { "get_nameservers", Lget_nameservers },
76 { "get_consolecolor", Lget_consolecolor },
77 { "set_consolecolor", Lset_consolecolor },
81 LUALIB_API int luaopen_util_windows(lua_State *L) {
82 luaL_register(L, "windows", Reg);
83 lua_pushliteral(L, "version"); /** version */
84 lua_pushliteral(L, "-3.14");