prosody
29f974ef00a7
util-src/encodings.c

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util-src/encodings.c @ 481:29f974ef00a7

More Makefile improvements (install the certificates, and update the config on install to find them)
author Matthew Wild <mwild1@gmail.com>
date Sat, 29 Nov 2008 17:52:10 +0000
parent 474:666e22848890
child 520:e96ac4bb6dd8
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 /*
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2 * encodings.c
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3 * Lua library for base64, stringprep and idna encodings
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4 */
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5
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6 // Newer MSVC compilers deprecate strcpy as unsafe, but we use it in a safe way
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7 #define _CRT_SECURE_NO_DEPRECATE
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8
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9 #include <string.h>
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10 #include <stdlib.h>
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11
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12 #include "lua.h"
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13 #include "lauxlib.h"
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14
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15 /***************** BASE64 *****************/
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16
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17 static const char code[]=
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18 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
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19
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20 static void base64_encode(luaL_Buffer *b, unsigned int c1, unsigned int c2, unsigned int c3, int n)
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21 {
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22 unsigned long tuple=c3+256UL*(c2+256UL*c1);
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23 int i;
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24 char s[4];
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25 for (i=0; i<4; i++) {
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26 s[3-i] = code[tuple % 64];
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27 tuple /= 64;
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28 }
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29 for (i=n+1; i<4; i++) s[i]='=';
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30 luaL_addlstring(b,s,4);
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31 }
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32
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33 static int Lbase64_encode(lua_State *L) /** encode(s) */
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34 {
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35 size_t l;
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36 const unsigned char *s=(const unsigned char*)luaL_checklstring(L,1,&l);
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37 luaL_Buffer b;
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38 int n;
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39 luaL_buffinit(L,&b);
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40 for (n=l/3; n--; s+=3) base64_encode(&b,s[0],s[1],s[2],3);
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41 switch (l%3)
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42 {
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43 case 1: base64_encode(&b,s[0],0,0,1); break;
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44 case 2: base64_encode(&b,s[0],s[1],0,2); break;
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45 }
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46 luaL_pushresult(&b);
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47 return 1;
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48 }
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49
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50 static void base64_decode(luaL_Buffer *b, int c1, int c2, int c3, int c4, int n)
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51 {
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52 unsigned long tuple=c4+64L*(c3+64L*(c2+64L*c1));
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53 char s[3];
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54 switch (--n)
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55 {
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56 case 3: s[2]=(char) tuple;
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57 case 2: s[1]=(char) (tuple >> 8);
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58 case 1: s[0]=(char) (tuple >> 16);
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59 }
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60 luaL_addlstring(b,s,n);
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61 }
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62
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63 static int Lbase64_decode(lua_State *L) /** decode(s) */
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64 {
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65 size_t l;
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66 const char *s=luaL_checklstring(L,1,&l);
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67 luaL_Buffer b;
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68 int n=0;
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69 char t[4];
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70 luaL_buffinit(L,&b);
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71 for (;;)
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72 {
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73 int c=*s++;
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74 switch (c)
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75 {
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76 const char *p;
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77 default:
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78 p=strchr(code,c); if (p==NULL) return 0;
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79 t[n++]= (char) (p-code);
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80 if (n==4)
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81 {
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82 base64_decode(&b,t[0],t[1],t[2],t[3],4);
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83 n=0;
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84 }
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85 break;
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86 case '=':
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87 switch (n)
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88 {
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89 case 1: base64_decode(&b,t[0],0,0,0,1); break;
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90 case 2: base64_decode(&b,t[0],t[1],0,0,2); break;
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91 case 3: base64_decode(&b,t[0],t[1],t[2],0,3); break;
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92 }
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93 case 0:
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94 luaL_pushresult(&b);
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95 return 1;
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96 case '\n': case '\r': case '\t': case ' ': case '\f': case '\b':
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97 break;
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98 }
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99 }
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100 return 0;
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101 }
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102
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103 static const luaL_Reg Reg_base64[] =
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104 {
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105 { "encode", Lbase64_encode },
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106 { "decode", Lbase64_decode },
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107 { NULL, NULL }
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108 };
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109
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110 /***************** STRINGPREP *****************/
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111
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112 #include <stringprep.h>
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113
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114 static int stringprep_prep(lua_State *L, const Stringprep_profile *profile)
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115 {
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116 size_t len;
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117 const char *s = luaL_checklstring(L, 1, &len);
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118 char string[1024];
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119 int ret;
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120 if (len >= 1024) {
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121 lua_pushnil(L);
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122 return 1; // TODO return error message
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123 }
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124 strcpy(string, s);
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125 ret = stringprep(string, 1024, 0, profile);
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126 if (ret == STRINGPREP_OK) {
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127 lua_pushstring(L, string);
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128 return 1;
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129 } else {
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130 lua_pushnil(L);
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131 return 1; // TODO return error message
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132 }
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133 }
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134
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135 #define MAKE_PREP_FUNC(myFunc, prep) \
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136 static int myFunc(lua_State *L) { return stringprep_prep(L, prep); }
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137
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138 MAKE_PREP_FUNC(Lstringprep_nameprep, stringprep_nameprep) /** stringprep.nameprep(s) */
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139 MAKE_PREP_FUNC(Lstringprep_nodeprep, stringprep_xmpp_nodeprep) /** stringprep.nodeprep(s) */
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140 MAKE_PREP_FUNC(Lstringprep_resourceprep, stringprep_xmpp_resourceprep) /** stringprep.resourceprep(s) */
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141 MAKE_PREP_FUNC(Lstringprep_saslprep, stringprep_saslprep) /** stringprep.saslprep(s) */
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142
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143 static const luaL_Reg Reg_stringprep[] =
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144 {
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145 { "nameprep", Lstringprep_nameprep },
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146 { "nodeprep", Lstringprep_nodeprep },
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147 { "resourceprep", Lstringprep_resourceprep },
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148 { "saslprep", Lstringprep_saslprep },
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149 { NULL, NULL }
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150 };
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151
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152 /***************** IDNA *****************/
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153
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154 #include <idna.h>
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155
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156 static int Lidna_to_ascii(lua_State *L) /** idna.to_ascii(s) */
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157 {
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158 size_t len;
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159 const char *s = luaL_checklstring(L, 1, &len);
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160 char* output = NULL;
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161 int ret = idna_to_ascii_8z(s, &output, 0);
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162 if (ret == IDNA_SUCCESS) {
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163 lua_pushstring(L, output);
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164 if (output) free(output);
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165 return 1;
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166 } else {
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167 lua_pushnil(L);
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168 if (output) free(output);
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169 return 1; // TODO return error message
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170 }
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171 }
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172
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173 static int Lidna_to_unicode(lua_State *L) /** idna.to_unicode(s) */
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174 {
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175 size_t len;
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176 const char *s = luaL_checklstring(L, 1, &len);
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177 char* output = NULL;
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178 int ret = idna_to_unicode_8z8z(s, &output, 0);
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179 if (ret == IDNA_SUCCESS) {
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180 lua_pushstring(L, output);
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181 if (output) free(output);
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182 return 1;
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183 } else {
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184 lua_pushnil(L);
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185 if (output) free(output);
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186 return 1; // TODO return error message
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187 }
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188 }
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189
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190 static const luaL_Reg Reg_idna[] =
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191 {
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192 { "to_ascii", Lidna_to_ascii },
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193 { "to_unicode", Lidna_to_unicode },
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194 { NULL, NULL }
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195 };
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196
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197 /***************** end *****************/
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198
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199 static const luaL_Reg Reg[] =
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200 {
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201 { NULL, NULL }
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202 };
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203
432
fb19a5c14d44 Fix for hashes.c and encodings.c to rename luaopen for util_*
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204 LUALIB_API int luaopen_util_encodings(lua_State *L)
415
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205 {
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206 luaL_register(L, "encodings", Reg);
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207
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208 lua_pushliteral(L, "base64");
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209 lua_newtable(L);
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210 luaL_register(L, NULL, Reg_base64);
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211 lua_settable(L,-3);
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212
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213 lua_pushliteral(L, "stringprep");
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214 lua_newtable(L);
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215 luaL_register(L, NULL, Reg_stringprep);
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216 lua_settable(L,-3);
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217
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218 lua_pushliteral(L, "idna");
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219 lua_newtable(L);
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220 luaL_register(L, NULL, Reg_idna);
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221 lua_settable(L,-3);
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222
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223 lua_pushliteral(L, "version"); /** version */
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224 lua_pushliteral(L, "-3.14");
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225 lua_settable(L,-3);
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226 return 1;
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227 }