author | Kim Alvefur <zash@zash.se> |
Mon, 23 Mar 2015 14:26:34 +0100 | |
changeset 6594 | fe3018a2f187 |
parent 4302 | bbb0bf0a09f5 |
child 6595 | 141afe8a167b |
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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-- Copyright (C) 1994-2015 Lua.org, PUC-Rio. |
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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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|
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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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84 |
{ |
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const char *p; |
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86 |
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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90 |
{ |
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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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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 |
} |
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112 |
|
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113 |
static const luaL_Reg Reg_base64[] = |
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114 |
{ |
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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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119 |
|
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/******************* UTF-8 ********************/ |
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121 |
|
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122 |
/* |
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* Adapted from Lua 5.3 |
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* Needed because libidn does not validate that input is valid UTF-8 |
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125 |
*/ |
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126 |
|
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#define MAXUNICODE 0x10FFFF |
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128 |
|
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129 |
/* |
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130 |
* Decode one UTF-8 sequence, returning NULL if byte sequence is invalid. |
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*/ |
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static const char *utf8_decode (const char *o, int *val) { |
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static unsigned int limits[] = {0xFF, 0x7F, 0x7FF, 0xFFFF}; |
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const unsigned char *s = (const unsigned char *)o; |
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unsigned int c = s[0]; |
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unsigned int res = 0; /* final result */ |
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if (c < 0x80) /* ascii? */ |
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res = c; |
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else { |
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int count = 0; /* to count number of continuation bytes */ |
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while (c & 0x40) { /* still have continuation bytes? */ |
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int cc = s[++count]; /* read next byte */ |
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if ((cc & 0xC0) != 0x80) /* not a continuation byte? */ |
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return NULL; /* invalid byte sequence */ |
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res = (res << 6) | (cc & 0x3F); /* add lower 6 bits from cont. byte */ |
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c <<= 1; /* to test next bit */ |
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} |
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res |= ((c & 0x7F) << (count * 5)); /* add first byte */ |
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if (count > 3 || res > MAXUNICODE || res <= limits[count] || (0xd800 <= res && res <= 0xdfff) ) |
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return NULL; /* invalid byte sequence */ |
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s += count; /* skip continuation bytes read */ |
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152 |
} |
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if (val) *val = res; |
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return (const char *)s + 1; /* +1 to include first byte */ |
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155 |
} |
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156 |
|
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157 |
/* |
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* Check that a string is valid UTF-8 |
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* Returns NULL if not |
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*/ |
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const char* check_utf8 (lua_State *L, int idx, size_t *l) { |
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size_t pos, len; |
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const char *s = luaL_checklstring(L, 1, &len); |
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pos = 0; |
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while (pos <= len) { |
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const char *s1 = utf8_decode(s + pos, NULL); |
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if (s1 == NULL) { /* conversion error? */ |
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return NULL; |
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169 |
} |
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pos = s1 - s; |
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} |
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if(l != NULL) { |
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*l = len; |
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} |
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return s; |
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176 |
} |
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177 |
|
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178 |
|
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/***************** STRINGPREP *****************/ |
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#ifdef USE_STRINGPREP_ICU |
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|
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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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185 |
|
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static int icu_stringprep_prep(lua_State *L, const UStringPrepProfile *profile) |
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187 |
{ |
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size_t input_len; |
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189 |
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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195 |
|
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UErrorCode err = U_ZERO_ERROR; |
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|
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if(!lua_isstring(L, 1)) { |
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lua_pushnil(L); |
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return 1; |
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} |
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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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} |
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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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} 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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else |
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lua_pushnil(L); |
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return 1; |
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223 |
} |
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} |
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|
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UStringPrepProfile *icu_nameprep; |
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UStringPrepProfile *icu_nodeprep; |
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UStringPrepProfile *icu_resourceprep; |
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UStringPrepProfile *icu_saslprep; |
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|
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/* initialize global ICU stringprep profiles */ |
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void init_icu() |
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233 |
{ |
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UErrorCode err = U_ZERO_ERROR; |
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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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if (U_FAILURE(err)) fprintf(stderr, "[c] util.encodings: error: %s\n", u_errorName((UErrorCode)err)); |
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241 |
} |
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|
242 |
|
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243 |
#define MAKE_PREP_FUNC(myFunc, prep) \ |
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static int myFunc(lua_State *L) { return icu_stringprep_prep(L, prep); } |
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245 |
|
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MAKE_PREP_FUNC(Lstringprep_nameprep, icu_nameprep) /** stringprep.nameprep(s) */ |
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MAKE_PREP_FUNC(Lstringprep_nodeprep, icu_nodeprep) /** stringprep.nodeprep(s) */ |
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MAKE_PREP_FUNC(Lstringprep_resourceprep, icu_resourceprep) /** stringprep.resourceprep(s) */ |
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MAKE_PREP_FUNC(Lstringprep_saslprep, icu_saslprep) /** stringprep.saslprep(s) */ |
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250 |
|
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251 |
static const luaL_Reg Reg_stringprep[] = |
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252 |
{ |
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253 |
{ "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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258 |
}; |
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259 |
#else /* USE_STRINGPREP_ICU */ |
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|
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261 |
/****************** libidn ********************/ |
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262 |
|
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#include <stringprep.h> |
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|
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static int stringprep_prep(lua_State *L, const Stringprep_profile *profile) |
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{ |
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267 |
size_t len; |
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const char *s; |
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char string[1024]; |
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int ret; |
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if(!lua_isstring(L, 1)) { |
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lua_pushnil(L); |
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return 1; |
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} |
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s = check_utf8(L, 1, &len); |
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if (s == NULL || len >= 1024 || len != strlen(s)) { |
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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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289 |
} |
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290 |
|
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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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|
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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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298 |
|
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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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305 |
{ NULL, NULL } |
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306 |
}; |
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307 |
#endif |
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308 |
|
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309 |
/***************** IDNA *****************/ |
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#ifdef USE_STRINGPREP_ICU |
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311 |
#include <unicode/ustdio.h> |
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#include <unicode/uidna.h> |
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313 |
/* IDNA2003 or IDNA2008 ? ? ? */ |
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314 |
static int Lidna_to_ascii(lua_State *L) /** idna.to_ascii(s) */ |
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315 |
{ |
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316 |
size_t len; |
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317 |
int32_t ulen, dest_len, output_len; |
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318 |
const char *s = luaL_checklstring(L, 1, &len); |
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319 |
UChar ustr[1024]; |
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320 |
UErrorCode err = U_ZERO_ERROR; |
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|
321 |
UChar dest[1024]; |
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322 |
char output[1024]; |
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|
323 |
|
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324 |
u_strFromUTF8(ustr, 1024, &ulen, s, len, &err); |
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325 |
if (U_FAILURE(err)) { |
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326 |
lua_pushnil(L); |
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327 |
return 1; |
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328 |
} |
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|
329 |
|
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330 |
dest_len = uidna_IDNToASCII(ustr, ulen, dest, 1024, UIDNA_USE_STD3_RULES, NULL, &err); |
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331 |
if (U_FAILURE(err)) { |
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|
332 |
lua_pushnil(L); |
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|
333 |
return 1; |
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|
334 |
} else { |
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|
335 |
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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|
337 |
lua_pushlstring(L, output, output_len); |
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|
338 |
else |
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|
339 |
lua_pushnil(L); |
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|
340 |
return 1; |
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341 |
} |
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342 |
} |
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|
343 |
|
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|
344 |
static int Lidna_to_unicode(lua_State *L) /** idna.to_unicode(s) */ |
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|
345 |
{ |
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|
346 |
size_t len; |
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|
347 |
int32_t ulen, dest_len, output_len; |
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|
348 |
const char *s = luaL_checklstring(L, 1, &len); |
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349 |
UChar ustr[1024]; |
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|
350 |
UErrorCode err = U_ZERO_ERROR; |
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|
351 |
UChar dest[1024]; |
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|
352 |
char output[1024]; |
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|
353 |
|
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|
354 |
u_strFromUTF8(ustr, 1024, &ulen, s, len, &err); |
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355 |
if (U_FAILURE(err)) { |
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|
356 |
lua_pushnil(L); |
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|
357 |
return 1; |
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|
358 |
} |
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|
359 |
|
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|
360 |
dest_len = uidna_IDNToUnicode(ustr, ulen, dest, 1024, UIDNA_USE_STD3_RULES, NULL, &err); |
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|
361 |
if (U_FAILURE(err)) { |
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|
362 |
lua_pushnil(L); |
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|
363 |
return 1; |
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|
364 |
} else { |
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|
365 |
u_strToUTF8(output, 1024, &output_len, dest, dest_len, &err); |
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|
366 |
if (U_SUCCESS(err) && output_len < 1024) |
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|
367 |
lua_pushlstring(L, output, output_len); |
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|
368 |
else |
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|
369 |
lua_pushnil(L); |
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|
370 |
return 1; |
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|
371 |
} |
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|
372 |
} |
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|
373 |
|
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|
374 |
#else /* USE_STRINGPREP_ICU */ |
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|
375 |
/****************** libidn ********************/ |
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|
376 |
|
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|
377 |
#include <idna.h> |
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|
378 |
#include <idn-free.h> |
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|
379 |
|
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|
380 |
static int Lidna_to_ascii(lua_State *L) /** idna.to_ascii(s) */ |
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|
381 |
{ |
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|
382 |
size_t len; |
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|
383 |
const char *s = check_utf8(L, 1, &len); |
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|
384 |
if (s == NULL || len != strlen(s)) { |
fe3018a2f187
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|
385 |
lua_pushnil(L); |
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|
386 |
return 1; /* TODO return error message */ |
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Kim Alvefur <zash@zash.se>
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|
387 |
} |
4272
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|
388 |
char* output = NULL; |
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|
389 |
int ret = idna_to_ascii_8z(s, &output, IDNA_USE_STD3_ASCII_RULES); |
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|
390 |
if (ret == IDNA_SUCCESS) { |
0a4ce2086a88
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|
391 |
lua_pushstring(L, output); |
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|
392 |
idn_free(output); |
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|
393 |
return 1; |
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|
394 |
} else { |
0a4ce2086a88
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changeset
|
395 |
lua_pushnil(L); |
0a4ce2086a88
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|
396 |
idn_free(output); |
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|
397 |
return 1; /* TODO return error message */ |
0a4ce2086a88
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|
398 |
} |
0a4ce2086a88
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|
399 |
} |
0a4ce2086a88
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|
400 |
|
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|
401 |
static int Lidna_to_unicode(lua_State *L) /** idna.to_unicode(s) */ |
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|
402 |
{ |
0a4ce2086a88
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|
403 |
size_t len; |
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404 |
const char *s = luaL_checklstring(L, 1, &len); |
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405 |
char* output = NULL; |
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|
406 |
int ret = idna_to_unicode_8z8z(s, &output, 0); |
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|
407 |
if (ret == IDNA_SUCCESS) { |
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|
408 |
lua_pushstring(L, output); |
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|
409 |
idn_free(output); |
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|
410 |
return 1; |
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|
411 |
} else { |
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|
412 |
lua_pushnil(L); |
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|
413 |
idn_free(output); |
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|
414 |
return 1; /* TODO return error message */ |
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|
415 |
} |
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|
416 |
} |
3762
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|
417 |
#endif |
766
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|
418 |
|
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|
419 |
static const luaL_Reg Reg_idna[] = |
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|
420 |
{ |
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|
421 |
{ "to_ascii", Lidna_to_ascii }, |
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|
422 |
{ "to_unicode", Lidna_to_unicode }, |
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|
423 |
{ NULL, NULL } |
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|
424 |
}; |
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|
425 |
|
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|
426 |
/***************** end *****************/ |
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|
427 |
|
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changeset
|
428 |
static const luaL_Reg Reg[] = |
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changeset
|
429 |
{ |
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|
430 |
{ NULL, NULL } |
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|
431 |
}; |
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|
432 |
|
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changeset
|
433 |
LUALIB_API int luaopen_util_encodings(lua_State *L) |
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changeset
|
434 |
{ |
3762
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util.encodings: Support for ICU for IDNA operations.
Tobias Markmann <tm@ayena.de>
parents:
2923
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changeset
|
435 |
#ifdef USE_STRINGPREP_ICU |
f02bac902a1e
util.encodings: Support for ICU for IDNA operations.
Tobias Markmann <tm@ayena.de>
parents:
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changeset
|
436 |
init_icu(); |
f02bac902a1e
util.encodings: Support for ICU for IDNA operations.
Tobias Markmann <tm@ayena.de>
parents:
2923
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changeset
|
437 |
#endif |
766
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|
438 |
luaL_register(L, "encodings", Reg); |
433a5226267f
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changeset
|
439 |
|
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|
440 |
lua_pushliteral(L, "base64"); |
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|
441 |
lua_newtable(L); |
433a5226267f
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changeset
|
442 |
luaL_register(L, NULL, Reg_base64); |
433a5226267f
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changeset
|
443 |
lua_settable(L,-3); |
433a5226267f
Licensing/version updates for some files (forgot to commit, doh...)
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parents:
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changeset
|
444 |
|
433a5226267f
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changeset
|
445 |
lua_pushliteral(L, "stringprep"); |
433a5226267f
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Matthew Wild <mwild1@gmail.com>
parents:
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diff
changeset
|
446 |
lua_newtable(L); |
433a5226267f
Licensing/version updates for some files (forgot to commit, doh...)
Matthew Wild <mwild1@gmail.com>
parents:
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changeset
|
447 |
luaL_register(L, NULL, Reg_stringprep); |
433a5226267f
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Matthew Wild <mwild1@gmail.com>
parents:
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diff
changeset
|
448 |
lua_settable(L,-3); |
433a5226267f
Licensing/version updates for some files (forgot to commit, doh...)
Matthew Wild <mwild1@gmail.com>
parents:
601
diff
changeset
|
449 |
|
433a5226267f
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Matthew Wild <mwild1@gmail.com>
parents:
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changeset
|
450 |
lua_pushliteral(L, "idna"); |
433a5226267f
Licensing/version updates for some files (forgot to commit, doh...)
Matthew Wild <mwild1@gmail.com>
parents:
601
diff
changeset
|
451 |
lua_newtable(L); |
433a5226267f
Licensing/version updates for some files (forgot to commit, doh...)
Matthew Wild <mwild1@gmail.com>
parents:
601
diff
changeset
|
452 |
luaL_register(L, NULL, Reg_idna); |
433a5226267f
Licensing/version updates for some files (forgot to commit, doh...)
Matthew Wild <mwild1@gmail.com>
parents:
601
diff
changeset
|
453 |
lua_settable(L,-3); |
433a5226267f
Licensing/version updates for some files (forgot to commit, doh...)
Matthew Wild <mwild1@gmail.com>
parents:
601
diff
changeset
|
454 |
|
433a5226267f
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Matthew Wild <mwild1@gmail.com>
parents:
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diff
changeset
|
455 |
lua_pushliteral(L, "version"); /** version */ |
433a5226267f
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Matthew Wild <mwild1@gmail.com>
parents:
601
diff
changeset
|
456 |
lua_pushliteral(L, "-3.14"); |
433a5226267f
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Matthew Wild <mwild1@gmail.com>
parents:
601
diff
changeset
|
457 |
lua_settable(L,-3); |
433a5226267f
Licensing/version updates for some files (forgot to commit, doh...)
Matthew Wild <mwild1@gmail.com>
parents:
601
diff
changeset
|
458 |
return 1; |
433a5226267f
Licensing/version updates for some files (forgot to commit, doh...)
Matthew Wild <mwild1@gmail.com>
parents:
601
diff
changeset
|
459 |
} |