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/***************************************************************************
* *
* _____ ____ *
* | __ \ / __ \ _ _ _____ *
* | | \ \ / / \_\ | | | | _ \ *
* | | \ \| | | | | | |_| | *
* | | | || | | | | | ___/ *
* | | / /| | __ | | | | _ \ *
* | |__/ / \ \__/ / | |___| | |_| | *
* |_____/ \____/ |_____|_|_____/ *
* *
* Wiimms source code library *
* *
***************************************************************************
* *
* Copyright (c) 2012-2023 by Dirk Clemens <wiimm@wiimm.de> *
* *
***************************************************************************
* *
* This library is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This library is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* See file gpl-2.0.txt or http://www.gnu.org/licenses/gpl-2.0.txt *
* *
***************************************************************************/
#include "dclib-basics.h"
#include "dclib-utf8.h"
#include "dclib-punycode.h"
#include <limits.h>
#include "dclib-punycode.inc"
//
///////////////////////////////////////////////////////////////////////////////
/////////////// Domain2UTF8() ///////////////
///////////////////////////////////////////////////////////////////////////////
uint Domain2UTF8
(
// returns the number of scanned bytes of 'source' or 0 on error
char *buf, // valid destination buffer
int buf_size, // size of 'buf' >= 4
const void *source, // NULL or UTF-8 domain to translate
int source_len // length of 'source'; if <0: use strlen(source)
)
{
DASSERT(buf)
DASSERT(source||!source_len);
if ( buf_size < 4 || !source )
return 0;
if ( source_len < 0 )
source_len = strlen(source);
ccp src = source, src_end = source + source_len;
char *buf_ptr = buf, *buf_end = buf + buf_size - 2;
enum { MAX_LEN = 1000 };
char name[MAX_LEN+10];
punycode_uint pname[MAX_LEN+2];
MARK_USED(name,pname);
while ( src < src_end )
{
while ( buf_ptr < buf_end && src < src_end && *src == '.' )
*buf_ptr++ = *src++;
if ( buf_ptr >= buf_end )
{
if (!src)
goto error;
break;
}
if ( src >= src_end )
break;
ccp point = strchr(src,'.');
if (!point)
point = src_end;
if ( src+4 > src_end || memcmp(src,"xn--",4 ))
buf_ptr = StringCopyEM(buf_ptr,buf_end,src,point-src);
else
{
src += 4;
punycode_uint olen = MAX_LEN;
const enum punycode_status stat
= punycode_decode(point-src,src,&olen,pname,0);
char *dest = name;
if ( stat != punycode_success )
dest = name + snprintf(name,sizeof(name),"!ERR=%d",stat);
else
{
punycode_uint *src = pname, *src_end = pname + olen;
char *dest_end = name + MAX_LEN;
while ( src < src_end && dest < dest_end )
dest = PrintUTF8Char(dest,*src++);
*dest = 0;
}
buf_ptr = StringCopyEM(buf_ptr,buf_end,name,dest-name);
}
src = point;
}
*buf_ptr = 0;
return src - (ccp)source;
error:
*buf = 0;
return 0;
}
//
///////////////////////////////////////////////////////////////////////////////
/////////////// Domain2ASCII() ///////////////
///////////////////////////////////////////////////////////////////////////////
uint Domain2ASCII
(
// returns the number of scanned bytes of 'source' or 0 on error
char *buf, // valid destination buffer
int buf_size, // size of 'buf' >= 5
const void *source, // NULL or ASCII domain to translate
int source_len // length of 'source'; if <0: use strlen(source)
)
{
DASSERT(buf)
DASSERT(source||!source_len);
if ( buf_size < 5 || !source )
return 0;
if ( source_len < 0 )
source_len = strlen(source);
ccp src = source, src_end = source + source_len;
char *buf_ptr = buf, *buf_end = buf + buf_size - 5;
enum { MAX_LEN = 1000 };
char name[MAX_LEN+10];
punycode_uint pname[MAX_LEN+2];
while ( src < src_end )
{
while ( buf_ptr < buf_end && src < src_end && *src == '.' )
*buf_ptr++ = *src++;
if ( buf_ptr >= buf_end )
{
if (!src)
goto error;
break;
}
if ( src >= src_end )
break;
ccp point = strchr(src,'.');
if (!point)
point = src_end;
punycode_uint *dest = pname, *dest_end = pname + MAX_LEN;
while ( dest < dest_end && src < point )
{
u32 code = ScanUTF8AnsiCharE(&src,point);
*dest++ = code;
}
punycode_uint olen = MAX_LEN;
const enum punycode_status stat =
punycode_encode(dest-pname,pname,0,&olen,name);
if (stat)
goto error;
if ( olen > 0 && name[olen-1] == '-' )
buf_ptr = StringCopyEM(buf_ptr,buf_end,name,olen-1);
else
{
name[olen] = 0;
buf_ptr = StringCat2E(buf_ptr,buf_end,"xn--",name);
}
}
*buf_ptr = 0;
return src - (ccp)source;
error:
*buf = 0;
return 0;
}
//
///////////////////////////////////////////////////////////////////////////////
/////////////// E N D ///////////////
///////////////////////////////////////////////////////////////////////////////
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