/*
 * Copyright (c) 1997 - 2001 Kungliga Tekniska Högskolan
 * (Royal Institute of Technology, Stockholm, Sweden). 
 * All rights reserved. 
 *
 * Redistribution and use in source and binary forms, with or without 
 * modification, are permitted provided that the following conditions 
 * are met: 
 *
 * 1. Redistributions of source code must retain the above copyright 
 *    notice, this list of conditions and the following disclaimer. 
 *
 * 2. Redistributions in binary form must reproduce the above copyright 
 *    notice, this list of conditions and the following disclaimer in the 
 *    documentation and/or other materials provided with the distribution. 
 *
 * 3. Neither the name of the Institute nor the names of its contributors 
 *    may be used to endorse or promote products derived from this software 
 *    without specific prior written permission. 
 *
 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 
 * SUCH DAMAGE. 
 */

#include "gen_locl.h"

/*
RCSID("$KTH: symbol.c,v 1.9 2001/09/25 13:39:27 assar Exp $");
*/

static Hashtab *htab;

static int
cmp (void *a, void *b)
{
  Symbol *s1 = (Symbol *)a;
  Symbol *s2 = (Symbol *)b;

  return strcmp (s1->name, s2->name);
}

static unsigned
hash (void *a)
{
  Symbol *s = (Symbol *)a;

  return hashjpw (s->name);
}

void
initsym (void)
{
  htab = hashtabnew (101, cmp, hash);
}


void
output_name (char *s)
{
  char *p;

  for (p = s; *p; ++p)
    if (*p == '-')
      *p = '_';
}

Symbol*
addsym (char *name)
{
  Symbol key, *s;

  key.name = name;
  s = (Symbol *)hashtabsearch (htab, (void *)&key);
  if (s == NULL) {
    s = (Symbol *)malloc (sizeof (*s));
    if (s == NULL)
	err(1, NULL);
    s->name = name;
    if ((s->gen_name = strdup(name)) == NULL)
	err(1, NULL);
    output_name (s->gen_name);
    s->stype = SUndefined;
    hashtabadd (htab, s);
  }
  return s;
}