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/* #############################################################################
* interface to the xml library's UFT-8 conversion
* #############################################################################
* Copyright (C) 2005-2009 Harry Brueckner
*
* This program 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 any later version.
* This program 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.
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
*
* Contact: Harry Brueckner <harry_b@mm.st>
* Muenchener Strasse 12a
* 85253 Kleinberghofen
* Germany
* #############################################################################
*/
/* #############################################################################
* includes
*/
#include "cpm.h"
#include "general.h"
#include "interface_utf8.h"
#include "memory.h"
#include "string.h"
/* #############################################################################
* global variables
*/
xmlCharEncodingHandler* encodingHandler = NULL;
char* convertbuffer = NULL;
/* #############################################################################
*
* Description convert the given string to the terminal display type (latin1)
* or UTF-8
* Author Harry Brueckner
* Date 2005-07-03
* Arguments int direction - 0 for input (to UTF-8),
* 1 for output direction
* char* instring - string to convert
* Return converted string
*/
char* convert(int direction, char* instring)
{
int insize,
outsize,
ret,
tmp;
TRACE(199, "convert()", NULL);
if (!instring)
return NULL;
if (!encodingHandler || !encodingHandler->output)
return instring; // NULL handler, return instring
if (convertbuffer)
{
memFreeString(__FILE__, __LINE__, convertbuffer);
convertbuffer = NULL;
}
insize = strlen((char*)instring) + 1;
outsize = insize * 2 - 1;
convertbuffer = memAlloc(__FILE__, __LINE__, outsize);
// (xml)encodingHandler doesn't handle empty strings
if(insize == 1){
convertbuffer[0] = '\0';
return convertbuffer;
}
tmp = insize - 1;
if (direction)
{
ret = encodingHandler -> output(
(unsigned char*)convertbuffer, &outsize,
(unsigned char*)instring, &tmp);
}
else
{
ret = encodingHandler -> input(
(unsigned char*)convertbuffer, &outsize,
(unsigned char*)instring, &tmp);
}
if (ret <= 0 || tmp != insize - 1)
{
fprintf(stderr, _("conversion failed for string '%s' (%d).\n"),
instring,
ret);
memFree(__FILE__, __LINE__, convertbuffer, outsize);
return NULL;
}
else
{
convertbuffer = memRealloc(__FILE__, __LINE__,
convertbuffer, insize * 2 - 1, outsize + 1);
convertbuffer[outsize] = 0;
}
return convertbuffer;
}
/* #############################################################################
*
* Description convert the given string to the terminal display type
* Arguments char* instring - string to convert
* Return converted string
*/
char* convert2terminal(xmlChar* instring)
{
TRACE(199, "convert2terminal()", NULL);
return convert(1, (char*)instring);
}
/* #############################################################################
*
* Description convert the given string to UTF8 (xml)
* Author Harry Brueckner
* Date 2005-07-01
* Arguments char* instring - string to convert
* Return converted string
*/
xmlChar* convert2xml(char* instring)
{
TRACE(199, "convert2xml()", NULL);
return (xmlChar*)convert(0, instring);
}
/* #############################################################################
*
* Description free the UTF8 module
* Author Harry Brueckner
* Date 2005-03-18
* Arguments void
* Return void
*/
void freeUTF8Interface(void)
{
TRACE(99, "freeUTF8Interface()", NULL);
if (convertbuffer)
{
memFreeString(__FILE__, __LINE__, convertbuffer);
convertbuffer = NULL;
}
if (encodingHandler)
{ xmlCharEncCloseFunc(encodingHandler); }
}
/* #############################################################################
*
* Description initialize the XML encoding engine
* Author Harry Brueckner
* Date 2005-07-01
* Arguments char* encoding - the encoding string
* Return 0 on error or 1 if all is well
*/
#define TSTRING "teststring "
int initUTF8Encoding(char* encoding)
{
xmlCharEncoding encoder;
int status = 0;
char* tmp;
char* tstring1 = NULL;
char* tstring2 = NULL;
TRACE(99, "initUTF8Encoding()", NULL);
/* we first try to find the encode by it's name */
encoder = xmlParseCharEncoding(encoding);
if (encoder <= 0)
{fprintf(stderr,"parse char\n"); return 0; }
/* and then load it by using it's id */
encodingHandler = xmlGetCharEncodingHandler(encoder);
if (!encodingHandler) {
switch(encoder) {
case XML_CHAR_ENCODING_NONE:
case XML_CHAR_ENCODING_UTF8:
// null handler, no encoder.
return 1;
default:
fprintf(stderr,"Failed to init character handler.\n");
return 0;
}
}
tmp = convert(0, TSTRING);
if (tmp)
{ /* converting to UTF-8 was successful */
tstring1 = memAlloc(__FILE__, __LINE__, strlen(tmp) + 1);
strStrncpy(tstring1, tmp, strlen(tmp) + 1);
}
tmp = convert(1, tstring1);
if (tmp)
{ /* converting to terminal usage was successful */
tstring2 = memAlloc(__FILE__, __LINE__, strlen(tmp) + 1);
strStrncpy(tstring2, tmp, strlen(tmp) + 1);
}
if (tstring1 &&
tstring2 &&
!strcmp(TSTRING, tstring2))
{ status = 1; }
memFreeString(__FILE__, __LINE__, tstring1);
memFreeString(__FILE__, __LINE__, tstring2);
return status;
}
/* #############################################################################
*/
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