prosody
1f6f05a98fcd
util-src/windows.c

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util-src/windows.c @ 12575:1f6f05a98fcd

util-src: Remove Lua 5.1 compat macros Part of #1600
author Kim Alvefur <zash@zash.se>
date Fri, 01 Jul 2022 21:21:21 +0200
parent 10921:6eb5d2bb11af
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rev   line source
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1 /* Prosody IM
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2 -- Copyright (C) 2008-2010 Matthew Wild
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3 -- Copyright (C) 2008-2010 Waqas Hussain
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4 --
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5 -- This project is MIT/X11 licensed. Please see the
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6 -- COPYING file in the source package for more information.
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7 --
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8 */
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9
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10 /*
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11 * windows.c
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12 * Windows support functions for Lua
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13 */
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14
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15 #include <stdio.h>
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16 #include <windows.h>
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17 #include <windns.h>
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18
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19 #include "lua.h"
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20 #include "lauxlib.h"
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21
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22 #if (LUA_VERSION_NUM < 504)
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23 #define luaL_pushfail lua_pushnil
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24 #endif
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25
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26 static int Lget_nameservers(lua_State *L) {
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27 char stack_buffer[1024]; // stack allocated buffer
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28 IP4_ARRAY *ips = (IP4_ARRAY *) stack_buffer;
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29 DWORD len = sizeof(stack_buffer);
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30 DNS_STATUS status;
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31
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32 status = DnsQueryConfig(DnsConfigDnsServerList, FALSE, NULL, NULL, ips, &len);
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33
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34 if(status == 0) {
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35 DWORD i;
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36 lua_createtable(L, ips->AddrCount, 0);
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37
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38 for(i = 0; i < ips->AddrCount; i++) {
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39 DWORD ip = ips->AddrArray[i];
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40 char ip_str[16] = "";
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41 sprintf_s(ip_str, sizeof(ip_str), "%d.%d.%d.%d", (ip >> 0) & 255, (ip >> 8) & 255, (ip >> 16) & 255, (ip >> 24) & 255);
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42 lua_pushstring(L, ip_str);
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43 lua_rawseti(L, -2, i + 1);
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44 }
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45
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46 return 1;
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47 } else {
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48 luaL_pushfail(L);
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49 lua_pushfstring(L, "DnsQueryConfig returned %d", status);
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50 return 2;
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51 }
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52 }
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53
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54 static int lerror(lua_State *L, char *string) {
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55 luaL_pushfail(L);
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56 lua_pushfstring(L, "%s: %d", string, GetLastError());
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57 return 2;
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58 }
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59
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60 static int Lget_consolecolor(lua_State *L) {
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61 HWND console = GetStdHandle(STD_OUTPUT_HANDLE);
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62 WORD color;
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63 DWORD read_len;
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64
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65 CONSOLE_SCREEN_BUFFER_INFO info;
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66
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67 if(console == INVALID_HANDLE_VALUE) {
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68 return lerror(L, "GetStdHandle");
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69 }
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70
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71 if(!GetConsoleScreenBufferInfo(console, &info)) {
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72 return lerror(L, "GetConsoleScreenBufferInfo");
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73 }
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74
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75 if(!ReadConsoleOutputAttribute(console, &color, 1, info.dwCursorPosition, &read_len)) {
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76 return lerror(L, "ReadConsoleOutputAttribute");
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77 }
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78
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79 lua_pushnumber(L, color);
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80 return 1;
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81 }
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82 static int Lset_consolecolor(lua_State *L) {
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83 int color = luaL_checkint(L, 1);
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84 HWND console = GetStdHandle(STD_OUTPUT_HANDLE);
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85
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86 if(console == INVALID_HANDLE_VALUE) {
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87 return lerror(L, "GetStdHandle");
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88 }
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89
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90 if(!SetConsoleTextAttribute(console, color)) {
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91 return lerror(L, "SetConsoleTextAttribute");
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92 }
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93
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94 lua_pushboolean(L, 1);
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95 return 1;
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96 }
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97
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98 static const luaL_Reg Reg[] = {
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99 { "get_nameservers", Lget_nameservers },
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100 { "get_consolecolor", Lget_consolecolor },
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101 { "set_consolecolor", Lset_consolecolor },
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102 { NULL, NULL }
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103 };
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104
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105 LUALIB_API int luaopen_util_windows(lua_State *L) {
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106 luaL_checkversion(L);
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107 lua_newtable(L);
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108 luaL_setfuncs(L, Reg, 0);
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109 lua_pushliteral(L, "-3.14");
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110 lua_setfield(L, -2, "version");
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111 return 1;
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parents: 2923
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112 }