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util-src/encodings.c @ 1148:5dafbc0ded34
stanza_router: Prevent further processing of a handled stanza
author | Waqas Hussain <waqas20@gmail.com> |
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date | Fri, 15 May 2009 06:31:32 +0500 |
parent | 896:2c0b9e3c11c3 |
child | 1829:3d0db768be2f |
rev | line source |
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896 | 1 /* Prosody IM v0.4 |
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2 -- Copyright (C) 2008-2009 Matthew Wild |
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3 -- Copyright (C) 2008-2009 Waqas Hussain |
520 | 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 * encodings.c |
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12 * Lua library for base64, stringprep and idna encodings |
520 | 13 */ |
14 | |
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15 // Newer MSVC compilers deprecate strcpy as unsafe, but we use it in a safe way |
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16 #define _CRT_SECURE_NO_DEPRECATE |
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18 #include <string.h> |
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19 #include <stdlib.h> |
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20 |
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21 #include "lua.h" |
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22 #include "lauxlib.h" |
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23 |
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24 /***************** BASE64 *****************/ |
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25 |
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26 static const char code[]= |
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27 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; |
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28 |
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29 static void base64_encode(luaL_Buffer *b, unsigned int c1, unsigned int c2, unsigned int c3, int n) |
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30 { |
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31 unsigned long tuple=c3+256UL*(c2+256UL*c1); |
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32 int i; |
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33 char s[4]; |
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34 for (i=0; i<4; i++) { |
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35 s[3-i] = code[tuple % 64]; |
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36 tuple /= 64; |
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37 } |
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38 for (i=n+1; i<4; i++) s[i]='='; |
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39 luaL_addlstring(b,s,4); |
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40 } |
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41 |
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42 static int Lbase64_encode(lua_State *L) /** encode(s) */ |
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43 { |
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44 size_t l; |
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45 const unsigned char *s=(const unsigned char*)luaL_checklstring(L,1,&l); |
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46 luaL_Buffer b; |
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47 int n; |
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48 luaL_buffinit(L,&b); |
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49 for (n=l/3; n--; s+=3) base64_encode(&b,s[0],s[1],s[2],3); |
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50 switch (l%3) |
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51 { |
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52 case 1: base64_encode(&b,s[0],0,0,1); break; |
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53 case 2: base64_encode(&b,s[0],s[1],0,2); break; |
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54 } |
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55 luaL_pushresult(&b); |
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56 return 1; |
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57 } |
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58 |
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59 static void base64_decode(luaL_Buffer *b, int c1, int c2, int c3, int c4, int n) |
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60 { |
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61 unsigned long tuple=c4+64L*(c3+64L*(c2+64L*c1)); |
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62 char s[3]; |
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63 switch (--n) |
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64 { |
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65 case 3: s[2]=(char) tuple; |
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66 case 2: s[1]=(char) (tuple >> 8); |
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67 case 1: s[0]=(char) (tuple >> 16); |
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68 } |
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69 luaL_addlstring(b,s,n); |
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70 } |
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71 |
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72 static int Lbase64_decode(lua_State *L) /** decode(s) */ |
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73 { |
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74 size_t l; |
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75 const char *s=luaL_checklstring(L,1,&l); |
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76 luaL_Buffer b; |
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77 int n=0; |
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78 char t[4]; |
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79 luaL_buffinit(L,&b); |
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80 for (;;) |
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81 { |
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82 int c=*s++; |
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83 switch (c) |
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84 { |
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85 const char *p; |
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86 default: |
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87 p=strchr(code,c); if (p==NULL) return 0; |
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88 t[n++]= (char) (p-code); |
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89 if (n==4) |
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90 { |
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91 base64_decode(&b,t[0],t[1],t[2],t[3],4); |
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92 n=0; |
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93 } |
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94 break; |
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95 case '=': |
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96 switch (n) |
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97 { |
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98 case 1: base64_decode(&b,t[0],0,0,0,1); break; |
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99 case 2: base64_decode(&b,t[0],t[1],0,0,2); break; |
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100 case 3: base64_decode(&b,t[0],t[1],t[2],0,3); break; |
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101 } |
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102 n=0; |
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103 break; |
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104 case 0: |
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105 luaL_pushresult(&b); |
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106 return 1; |
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107 case '\n': case '\r': case '\t': case ' ': case '\f': case '\b': |
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108 break; |
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109 } |
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110 } |
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111 return 0; |
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112 } |
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113 |
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114 static const luaL_Reg Reg_base64[] = |
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115 { |
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116 { "encode", Lbase64_encode }, |
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117 { "decode", Lbase64_decode }, |
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118 { NULL, NULL } |
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119 }; |
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120 |
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121 /***************** STRINGPREP *****************/ |
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122 |
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123 #include <stringprep.h> |
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124 |
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125 static int stringprep_prep(lua_State *L, const Stringprep_profile *profile) |
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126 { |
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127 size_t len; |
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128 const char *s = luaL_checklstring(L, 1, &len); |
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129 char string[1024]; |
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130 int ret; |
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131 if (len >= 1024) { |
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132 lua_pushnil(L); |
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133 return 1; // TODO return error message |
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134 } |
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135 strcpy(string, s); |
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136 ret = stringprep(string, 1024, 0, profile); |
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137 if (ret == STRINGPREP_OK) { |
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138 lua_pushstring(L, string); |
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139 return 1; |
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140 } else { |
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141 lua_pushnil(L); |
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142 return 1; // TODO return error message |
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143 } |
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144 } |
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145 |
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146 #define MAKE_PREP_FUNC(myFunc, prep) \ |
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147 static int myFunc(lua_State *L) { return stringprep_prep(L, prep); } |
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148 |
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149 MAKE_PREP_FUNC(Lstringprep_nameprep, stringprep_nameprep) /** stringprep.nameprep(s) */ |
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150 MAKE_PREP_FUNC(Lstringprep_nodeprep, stringprep_xmpp_nodeprep) /** stringprep.nodeprep(s) */ |
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151 MAKE_PREP_FUNC(Lstringprep_resourceprep, stringprep_xmpp_resourceprep) /** stringprep.resourceprep(s) */ |
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152 MAKE_PREP_FUNC(Lstringprep_saslprep, stringprep_saslprep) /** stringprep.saslprep(s) */ |
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153 |
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154 static const luaL_Reg Reg_stringprep[] = |
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155 { |
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156 { "nameprep", Lstringprep_nameprep }, |
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157 { "nodeprep", Lstringprep_nodeprep }, |
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158 { "resourceprep", Lstringprep_resourceprep }, |
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159 { "saslprep", Lstringprep_saslprep }, |
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160 { NULL, NULL } |
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161 }; |
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162 |
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163 /***************** IDNA *****************/ |
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164 |
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165 #include <idna.h> |
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166 |
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167 static int Lidna_to_ascii(lua_State *L) /** idna.to_ascii(s) */ |
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168 { |
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169 size_t len; |
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170 const char *s = luaL_checklstring(L, 1, &len); |
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171 char* output = NULL; |
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172 int ret = idna_to_ascii_8z(s, &output, 0); |
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173 if (ret == IDNA_SUCCESS) { |
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174 lua_pushstring(L, output); |
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175 if (output) free(output); |
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176 return 1; |
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177 } else { |
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178 lua_pushnil(L); |
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179 if (output) free(output); |
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180 return 1; // TODO return error message |
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181 } |
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182 } |
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183 |
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184 static int Lidna_to_unicode(lua_State *L) /** idna.to_unicode(s) */ |
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185 { |
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186 size_t len; |
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187 const char *s = luaL_checklstring(L, 1, &len); |
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188 char* output = NULL; |
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189 int ret = idna_to_unicode_8z8z(s, &output, 0); |
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190 if (ret == IDNA_SUCCESS) { |
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191 lua_pushstring(L, output); |
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192 if (output) free(output); |
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193 return 1; |
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194 } else { |
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195 lua_pushnil(L); |
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196 if (output) free(output); |
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197 return 1; // TODO return error message |
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198 } |
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199 } |
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200 |
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201 static const luaL_Reg Reg_idna[] = |
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202 { |
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203 { "to_ascii", Lidna_to_ascii }, |
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204 { "to_unicode", Lidna_to_unicode }, |
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205 { NULL, NULL } |
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206 }; |
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207 |
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208 /***************** end *****************/ |
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209 |
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210 static const luaL_Reg Reg[] = |
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211 { |
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212 { NULL, NULL } |
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213 }; |
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214 |
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215 LUALIB_API int luaopen_util_encodings(lua_State *L) |
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216 { |
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217 luaL_register(L, "encodings", Reg); |
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218 |
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219 lua_pushliteral(L, "base64"); |
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220 lua_newtable(L); |
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221 luaL_register(L, NULL, Reg_base64); |
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222 lua_settable(L,-3); |
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223 |
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224 lua_pushliteral(L, "stringprep"); |
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225 lua_newtable(L); |
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226 luaL_register(L, NULL, Reg_stringprep); |
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227 lua_settable(L,-3); |
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228 |
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229 lua_pushliteral(L, "idna"); |
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230 lua_newtable(L); |
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231 luaL_register(L, NULL, Reg_idna); |
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232 lua_settable(L,-3); |
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233 |
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234 lua_pushliteral(L, "version"); /** version */ |
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235 lua_pushliteral(L, "-3.14"); |
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236 lua_settable(L,-3); |
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237 return 1; |
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Licensing/version updates for some files (forgot to commit, doh...)
Matthew Wild <mwild1@gmail.com>
parents:
601
diff
changeset
|
238 } |