/*

 * lftp - file transfer program

 *

 * Copyright (c) 1996-2012 by Alexander V. Lukyanov (lav@yars.free.net)

 *

 * 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 3 of the License, or

 * (at your option) 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, see <http://www.gnu.org/licenses/>.

 */

#include <config.h>

#include <stdlib.h>

#include "trio.h"

#include "alias.h"

Alias *Alias::base;

void Alias::Add(const char *alias,const char *value)

{

   Alias **scan=&bas;;

   while(*scan)

   {

      int dif=strcasecmp((*scan)->alias,alias);

      if(dif==0)

      {

	 (*scan)->value.set(value);

	 return;

      }

      if(dif>0)

	 break;

      scan=&((*scan)->next);

   }

   *scan=new Alias(alias,value,*scan);

}

void Alias::Del(const char *alias)

{

   Alias **scan=&bas;;

   while(*scan)

   {

      int dif=strcasecmp((*scan)->alias,alias);

      if(dif==0)

      {

	 Alias *tmp=(*scan)->next;

	 delete *scan;

	 *scan=tmp;

	 return;

      }

      scan=&((*scan)->next);

   }

}

const char *Alias::Find(const char *alias)

{

   Alias *scan=base;

   while(scan)

   {

      int dif=strcasecmp(scan->alias,alias);

      if(dif==0)

	 return(scan->value);

      if(dif>0)

	 break;

      scan=scan->next;

   }

   return 0;

}

char *Alias::Format()

{

   xstring res("");

   for(Alias *scan=base; scan; scan=scan->next)

   {

      res.append("alias ");

      const char *s=scan->alias;

      while(*s)

      {

	 if(strchr("\" \t\\>|",*s))

	    res.append('\\');

	 res.append(*s++);

      }

      res.append(' ');

      s=scan->value;

      bool par=false;

      if(*s==0 || strcspn(s," \t>|")!=strlen(s))

	 par=true;

      if(par)

	 res.append('"');

      while(*s)

      {

	 if(strchr("\"\\",*s))

	    res.append('\\');

	 res.append(*s++);

      }

      if(par)

	 res.append('"');

      res.append('\n');

   }

   return res.borrow();

}