author | Kim Alvefur <zash@zash.se> |
Wed, 17 Sep 2014 02:23:17 +0200 | |
changeset 6415 | 0e94f89d0e62 |
parent 6414 | 6c8f6364bc48 |
child 6416 | a552f4170aed |
permissions | -rw-r--r-- |
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/* Prosody IM |
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-- Copyright (C) 2008-2010 Matthew Wild |
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-- Copyright (C) 2008-2010 Waqas Hussain |
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-- |
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-- This project is MIT/X11 licensed. Please see the |
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-- COPYING file in the source package for more information. |
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-- |
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*/ |
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|
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/* |
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* encodings.c |
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* Lua library for base64, stringprep and idna encodings |
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*/ |
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||
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/* Newer MSVC compilers deprecate strcpy as unsafe, but we use it in a safe way */ |
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#define _CRT_SECURE_NO_DEPRECATE |
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#include <string.h> |
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#include <stdlib.h> |
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#include "lua.h" |
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#include "lauxlib.h" |
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/***************** BASE64 *****************/ |
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|
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static const char code[]= |
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"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; |
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|
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static void base64_encode(luaL_Buffer *b, unsigned int c1, unsigned int c2, unsigned int c3, int n) |
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{ |
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unsigned long tuple=c3+256UL*(c2+256UL*c1); |
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int i; |
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char s[4]; |
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for (i=0; i<4; i++) { |
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s[3-i] = code[tuple % 64]; |
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tuple /= 64; |
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} |
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for (i=n+1; i<4; i++) s[i]='='; |
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luaL_addlstring(b,s,4); |
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} |
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static int Lbase64_encode(lua_State *L) /** encode(s) */ |
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{ |
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size_t l; |
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const unsigned char *s=(const unsigned char*)luaL_checklstring(L,1,&l); |
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luaL_Buffer b; |
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int n; |
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luaL_buffinit(L,&b); |
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for (n=l/3; n--; s+=3) base64_encode(&b,s[0],s[1],s[2],3); |
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switch (l%3) |
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{ |
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case 1: base64_encode(&b,s[0],0,0,1); break; |
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case 2: base64_encode(&b,s[0],s[1],0,2); break; |
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} |
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luaL_pushresult(&b); |
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return 1; |
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} |
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static void base64_decode(luaL_Buffer *b, int c1, int c2, int c3, int c4, int n) |
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{ |
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unsigned long tuple=c4+64L*(c3+64L*(c2+64L*c1)); |
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char s[3]; |
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switch (--n) |
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{ |
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case 3: s[2]=(char) tuple; |
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case 2: s[1]=(char) (tuple >> 8); |
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case 1: s[0]=(char) (tuple >> 16); |
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} |
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luaL_addlstring(b,s,n); |
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} |
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|
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static int Lbase64_decode(lua_State *L) /** decode(s) */ |
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{ |
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size_t l; |
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const char *s=luaL_checklstring(L,1,&l); |
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luaL_Buffer b; |
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int n=0; |
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char t[4]; |
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luaL_buffinit(L,&b); |
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for (;;) |
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{ |
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int c=*s++; |
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switch (c) |
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{ |
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const char *p; |
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default: |
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p=strchr(code,c); if (p==NULL) return 0; |
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t[n++]= (char) (p-code); |
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if (n==4) |
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{ |
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base64_decode(&b,t[0],t[1],t[2],t[3],4); |
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n=0; |
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92 |
} |
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93 |
break; |
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case '=': |
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switch (n) |
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{ |
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case 1: base64_decode(&b,t[0],0,0,0,1); break; |
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case 2: base64_decode(&b,t[0],t[1],0,0,2); break; |
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case 3: base64_decode(&b,t[0],t[1],t[2],0,3); break; |
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} |
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n=0; |
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102 |
break; |
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103 |
case 0: |
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luaL_pushresult(&b); |
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return 1; |
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106 |
case '\n': case '\r': case '\t': case ' ': case '\f': case '\b': |
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107 |
break; |
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108 |
} |
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109 |
} |
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110 |
} |
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111 |
|
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112 |
static const luaL_Reg Reg_base64[] = |
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113 |
{ |
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{ "encode", Lbase64_encode }, |
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{ "decode", Lbase64_decode }, |
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{ NULL, NULL } |
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}; |
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118 |
|
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/***************** STRINGPREP *****************/ |
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#ifdef USE_STRINGPREP_ICU |
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#include <unicode/usprep.h> |
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#include <unicode/ustring.h> |
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#include <unicode/utrace.h> |
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125 |
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static int icu_stringprep_prep(lua_State *L, const UStringPrepProfile *profile) |
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{ |
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size_t input_len; |
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int32_t unprepped_len, prepped_len, output_len; |
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const char *input; |
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char output[1024]; |
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|
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UChar unprepped[1024]; /* Temporary unicode buffer (1024 characters) */ |
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UChar prepped[1024]; |
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135 |
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UErrorCode err = U_ZERO_ERROR; |
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137 |
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if(!lua_isstring(L, 1)) { |
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lua_pushnil(L); |
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140 |
return 1; |
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141 |
} |
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input = lua_tolstring(L, 1, &input_len); |
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if (input_len >= 1024) { |
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lua_pushnil(L); |
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return 1; |
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146 |
} |
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u_strFromUTF8(unprepped, 1024, &unprepped_len, input, input_len, &err); |
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if (U_FAILURE(err)) { |
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lua_pushnil(L); |
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return 1; |
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} |
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prepped_len = usprep_prepare(profile, unprepped, unprepped_len, prepped, 1024, 0, NULL, &err); |
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if (U_FAILURE(err)) { |
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lua_pushnil(L); |
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return 1; |
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156 |
} else { |
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u_strToUTF8(output, 1024, &output_len, prepped, prepped_len, &err); |
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if (U_SUCCESS(err) && output_len < 1024) |
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lua_pushlstring(L, output, output_len); |
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160 |
else |
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161 |
lua_pushnil(L); |
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162 |
return 1; |
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163 |
} |
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} |
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165 |
|
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166 |
UStringPrepProfile *icu_nameprep; |
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UStringPrepProfile *icu_nodeprep; |
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168 |
UStringPrepProfile *icu_resourceprep; |
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UStringPrepProfile *icu_saslprep; |
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170 |
|
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171 |
/* initialize global ICU stringprep profiles */ |
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172 |
void init_icu() |
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173 |
{ |
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174 |
UErrorCode err = U_ZERO_ERROR; |
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175 |
utrace_setLevel(UTRACE_VERBOSE); |
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icu_nameprep = usprep_openByType(USPREP_RFC3491_NAMEPREP, &err); |
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icu_nodeprep = usprep_openByType(USPREP_RFC3920_NODEPREP, &err); |
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icu_resourceprep = usprep_openByType(USPREP_RFC3920_RESOURCEPREP, &err); |
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icu_saslprep = usprep_openByType(USPREP_RFC4013_SASLPREP, &err); |
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180 |
if (U_FAILURE(err)) fprintf(stderr, "[c] util.encodings: error: %s\n", u_errorName((UErrorCode)err)); |
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181 |
} |
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182 |
|
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183 |
#define MAKE_PREP_FUNC(myFunc, prep) \ |
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184 |
static int myFunc(lua_State *L) { return icu_stringprep_prep(L, prep); } |
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185 |
|
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186 |
MAKE_PREP_FUNC(Lstringprep_nameprep, icu_nameprep) /** stringprep.nameprep(s) */ |
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187 |
MAKE_PREP_FUNC(Lstringprep_nodeprep, icu_nodeprep) /** stringprep.nodeprep(s) */ |
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188 |
MAKE_PREP_FUNC(Lstringprep_resourceprep, icu_resourceprep) /** stringprep.resourceprep(s) */ |
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189 |
MAKE_PREP_FUNC(Lstringprep_saslprep, icu_saslprep) /** stringprep.saslprep(s) */ |
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190 |
|
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191 |
static const luaL_Reg Reg_stringprep[] = |
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192 |
{ |
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193 |
{ "nameprep", Lstringprep_nameprep }, |
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194 |
{ "nodeprep", Lstringprep_nodeprep }, |
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195 |
{ "resourceprep", Lstringprep_resourceprep }, |
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196 |
{ "saslprep", Lstringprep_saslprep }, |
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197 |
{ NULL, NULL } |
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198 |
}; |
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199 |
#else /* USE_STRINGPREP_ICU */ |
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200 |
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201 |
/****************** libidn ********************/ |
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202 |
|
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#include <stringprep.h> |
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204 |
|
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static int stringprep_prep(lua_State *L, const Stringprep_profile *profile) |
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{ |
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size_t len; |
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const char *s; |
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209 |
char string[1024]; |
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210 |
int ret; |
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if(!lua_isstring(L, 1)) { |
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212 |
lua_pushnil(L); |
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return 1; |
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} |
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s = lua_tolstring(L, 1, &len); |
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if (len >= 1024) { |
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lua_pushnil(L); |
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return 1; /* TODO return error message */ |
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} |
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strcpy(string, s); |
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ret = stringprep(string, 1024, (Stringprep_profile_flags)0, profile); |
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if (ret == STRINGPREP_OK) { |
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lua_pushstring(L, string); |
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return 1; |
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} else { |
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lua_pushnil(L); |
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return 1; /* TODO return error message */ |
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} |
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} |
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|
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#define MAKE_PREP_FUNC(myFunc, prep) \ |
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static int myFunc(lua_State *L) { return stringprep_prep(L, prep); } |
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233 |
|
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MAKE_PREP_FUNC(Lstringprep_nameprep, stringprep_nameprep) /** stringprep.nameprep(s) */ |
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MAKE_PREP_FUNC(Lstringprep_nodeprep, stringprep_xmpp_nodeprep) /** stringprep.nodeprep(s) */ |
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MAKE_PREP_FUNC(Lstringprep_resourceprep, stringprep_xmpp_resourceprep) /** stringprep.resourceprep(s) */ |
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MAKE_PREP_FUNC(Lstringprep_saslprep, stringprep_saslprep) /** stringprep.saslprep(s) */ |
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|
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static const luaL_Reg Reg_stringprep[] = |
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{ |
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{ "nameprep", Lstringprep_nameprep }, |
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{ "nodeprep", Lstringprep_nodeprep }, |
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{ "resourceprep", Lstringprep_resourceprep }, |
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{ "saslprep", Lstringprep_saslprep }, |
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{ NULL, NULL } |
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}; |
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#endif |
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248 |
|
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249 |
/***************** IDNA *****************/ |
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#ifdef USE_STRINGPREP_ICU |
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#include <unicode/ustdio.h> |
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#include <unicode/uidna.h> |
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/* IDNA2003 or IDNA2008 ? ? ? */ |
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static int Lidna_to_ascii(lua_State *L) /** idna.to_ascii(s) */ |
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255 |
{ |
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size_t len; |
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int32_t ulen, dest_len, output_len; |
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const char *s = luaL_checklstring(L, 1, &len); |
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UChar ustr[1024]; |
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UErrorCode err = U_ZERO_ERROR; |
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UChar dest[1024]; |
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char output[1024]; |
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|
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u_strFromUTF8(ustr, 1024, &ulen, s, len, &err); |
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if (U_FAILURE(err)) { |
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lua_pushnil(L); |
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return 1; |
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} |
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|
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dest_len = uidna_IDNToASCII(ustr, ulen, dest, 1024, UIDNA_USE_STD3_RULES, NULL, &err); |
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if (U_FAILURE(err)) { |
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lua_pushnil(L); |
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return 1; |
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} else { |
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u_strToUTF8(output, 1024, &output_len, dest, dest_len, &err); |
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if (U_SUCCESS(err) && output_len < 1024) |
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lua_pushlstring(L, output, output_len); |
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else |
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lua_pushnil(L); |
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return 1; |
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} |
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} |
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|
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static int Lidna_to_unicode(lua_State *L) /** idna.to_unicode(s) */ |
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{ |
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size_t len; |
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int32_t ulen, dest_len, output_len; |
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const char *s = luaL_checklstring(L, 1, &len); |
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UChar ustr[1024]; |
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UErrorCode err = U_ZERO_ERROR; |
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UChar dest[1024]; |
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char output[1024]; |
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|
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u_strFromUTF8(ustr, 1024, &ulen, s, len, &err); |
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if (U_FAILURE(err)) { |
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lua_pushnil(L); |
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return 1; |
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} |
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|
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dest_len = uidna_IDNToUnicode(ustr, ulen, dest, 1024, UIDNA_USE_STD3_RULES, NULL, &err); |
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if (U_FAILURE(err)) { |
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lua_pushnil(L); |
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return 1; |
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} else { |
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u_strToUTF8(output, 1024, &output_len, dest, dest_len, &err); |
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if (U_SUCCESS(err) && output_len < 1024) |
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lua_pushlstring(L, output, output_len); |
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else |
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lua_pushnil(L); |
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return 1; |
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} |
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} |
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|
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#else /* USE_STRINGPREP_ICU */ |
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/****************** libidn ********************/ |
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|
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#include <idna.h> |
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#include <idn-free.h> |
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319 |
|
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static int Lidna_to_ascii(lua_State *L) /** idna.to_ascii(s) */ |
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321 |
{ |
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size_t len; |
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const char *s = luaL_checklstring(L, 1, &len); |
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char* output = NULL; |
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int ret = idna_to_ascii_8z(s, &output, IDNA_USE_STD3_ASCII_RULES); |
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if (ret == IDNA_SUCCESS) { |
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lua_pushstring(L, output); |
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idn_free(output); |
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return 1; |
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} else { |
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lua_pushnil(L); |
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idn_free(output); |
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return 1; /* TODO return error message */ |
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334 |
} |
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335 |
} |
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336 |
|
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static int Lidna_to_unicode(lua_State *L) /** idna.to_unicode(s) */ |
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338 |
{ |
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size_t len; |
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const char *s = luaL_checklstring(L, 1, &len); |
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char* output = NULL; |
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int ret = idna_to_unicode_8z8z(s, &output, 0); |
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if (ret == IDNA_SUCCESS) { |
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lua_pushstring(L, output); |
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idn_free(output); |
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return 1; |
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} else { |
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lua_pushnil(L); |
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idn_free(output); |
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return 1; /* TODO return error message */ |
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} |
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} |
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#endif |
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|
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static const luaL_Reg Reg_idna[] = |
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{ |
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{ "to_ascii", Lidna_to_ascii }, |
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{ "to_unicode", Lidna_to_unicode }, |
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{ NULL, NULL } |
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}; |
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361 |
|
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362 |
/***************** end *****************/ |
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363 |
|
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LUALIB_API int luaopen_util_encodings(lua_State *L) |
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{ |
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#ifdef USE_STRINGPREP_ICU |
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init_icu(); |
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#endif |
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lua_newtable(L); |
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|
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lua_newtable(L); |
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luaL_register(L, NULL, Reg_base64); |
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lua_setfield(L, -2, "base64"); |
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|
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lua_newtable(L); |
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luaL_register(L, NULL, Reg_stringprep); |
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lua_setfield(L, -2, "stringprep"); |
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|
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lua_newtable(L); |
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luaL_register(L, NULL, Reg_idna); |
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lua_setfield(L, -2, "idna"); |
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|
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lua_pushliteral(L, "-3.14"); |
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lua_setfield(L, -2, "version"); |
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385 |
return 1; |
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386 |
} |