/*
 * Copyright (c) 1995, 1996 Gunther Schadow.  All rights reserved.
 *
 * 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
 * (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, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */
#include "pg_config.h"

IDENT("@(#) cnv_func.cc (Gunther Schadow) 12/19/96");

#include "UnitAtom.h"
#include <exception.h>

const UnitAtom::cnv_func *
UnitAtom::cnv_func::lookup(const char *s)
{
  for(cnv_func *p = tab; p->name != NULL; p++)
    {
      if(s[0] == p->name[0])
	{
	  if(strcmp(s, p->name) == 0)
	    {
	      return p;
	    }		  
	}
    }
  
  return NULL;
}

void
UnitAtom::cnv_func::resolve(UnitAtom::unit_s &u)
{
  if(u.cnv_name == NULL || u.cnv_name[0] == '\0')
    {
      u.cnv_from = NULL;
      u.cnv_to   = NULL;
      return;
    }
  else
    {
      const cnv_func *fp;
      if((fp = lookup(u.cnv_name)) == NULL)
	ERROR("cannot resolve `%s'", u.cnv_name);
      else
	{
	  u.cnv_from = fp->from;
	  u.cnv_to   = fp->to;
	  return;
	}
    }
}