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/**
* Copyright 2008 Digital Bazaar, Inc.
*
* This file is part of librdfa.
*
* librdfa is Free Software, and can be licensed under any of the
* following three licenses:
*
* 1. GNU Lesser General Public License (LGPL) V2.1 or any
* newer version
* 2. GNU General Public License (GPL) V2 or any newer version
* 3. Apache License, V2.0 or any newer version
*
* You may not use this file except in compliance with at least one of
* the above three licenses.
*
* See LICENSE-* at the top of this software distribution for more
* information regarding the details of each license.
*
* The language module is used to determine and set the current language.
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "rdfa_utils.h"
#include "rdfa.h"

/**
* Updates the language given the value of the xml:lang attribute.
*
* @param lang the new value of the lang attribute.
*/
void rdfa_update_language(rdfacontext* context, const char* lang)
{
   /* the [current element] is parsed for any language information,
* and [language] is set in the [current evaluation context]; */
   if(lang != NULL)
   {
      if(strlen(lang) > 0)
      {
         /* if a language was specified, set it */
         context->language = rdfa_replace_string(context->language, lang);
      }
      else
      {
         /* if a blank language was specified, clear the language context */
         free(context->language);
         context->language = NULL;
      }
   }
}
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