/*	Copyright (C) 1995, 1996, 1998 Free Software Foundation, Inc.
 * 
 * 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, 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 software; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
 * Boston, MA 02111-1307 USA
 *
 * As a special exception, the Free Software Foundation gives permission
 * for additional uses of the text contained in its release of GUILE.
 *
 * The exception is that, if you link the GUILE library with other files
 * to produce an executable, this does not by itself cause the
 * resulting executable to be covered by the GNU General Public License.
 * Your use of that executable is in no way restricted on account of
 * linking the GUILE library code into it.
 *
 * This exception does not however invalidate any other reasons why
 * the executable file might be covered by the GNU General Public License.
 *
 * This exception applies only to the code released by the
 * Free Software Foundation under the name GUILE.  If you copy
 * code from other Free Software Foundation releases into a copy of
 * GUILE, as the General Public License permits, the exception does
 * not apply to the code that you add in this way.  To avoid misleading
 * anyone as to the status of such modified files, you must delete
 * this exception notice from them.
 *
 * If you write modifications of your own for GUILE, it is your choice
 * whether to permit this exception to apply to your modifications.
 * If you do not wish that, delete this exception notice.  */

/* Software engineering face-lift by Greg J. Badros, 11-Dec-1999,
   gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */


#include <stdio.h>
#include "_scm.h"
#include "eq.h"
#include "list.h"

#include "scm_validate.h"
#include "alist.h"



GUILE_PROC(scm_acons, "acons", 3, 0, 0,
           (SCM w, SCM x, SCM y),
"")
#define FUNC_NAME s_scm_acons
{
  register SCM z;
  SCM_NEWCELL (z);
  SCM_SETCAR (z, w);
  SCM_SETCDR (z, x);
  x = z;
  SCM_NEWCELL (z);
  SCM_SETCAR (z, x);
  SCM_SETCDR (z, y);
  return z;
}
#undef FUNC_NAME



GUILE_PROC (scm_sloppy_assq, "sloppy-assq", 2, 0, 0,
            (SCM x, SCM alist),
"")
#define FUNC_NAME s_scm_sloppy_assq
{

  for (; SCM_NIMP (alist) && SCM_CONSP (alist); alist = SCM_CDR (alist))
    {
      SCM tmp = SCM_CAR(alist);
      if (SCM_NIMP (tmp) && SCM_CONSP (tmp) && (SCM_CAR (tmp)==x))
	return tmp;
    }
  return SCM_BOOL_F;
}
#undef FUNC_NAME



GUILE_PROC (scm_sloppy_assv, "sloppy-assv", 2, 0, 0,
            (SCM x, SCM alist),
"")
#define FUNC_NAME s_scm_sloppy_assv
{
  for (; SCM_NIMP (alist) && SCM_CONSP (alist); alist = SCM_CDR (alist))
    {
      SCM tmp = SCM_CAR(alist);
      if (SCM_NIMP (tmp)
	  && SCM_CONSP (tmp)
	  && SCM_NFALSEP (scm_eqv_p (SCM_CAR (tmp), x)))
	return tmp;
    }
  return SCM_BOOL_F;
}
#undef FUNC_NAME


GUILE_PROC (scm_sloppy_assoc, "sloppy-assoc", 2, 0, 0,
            (SCM x, SCM alist),
"")
#define FUNC_NAME s_scm_sloppy_assoc
{
  for (; SCM_NIMP (alist) && SCM_CONSP (alist); alist = SCM_CDR (alist))
    {
      SCM tmp = SCM_CAR(alist);
      if (SCM_NIMP (tmp)
	  && SCM_CONSP (tmp)
	  && SCM_NFALSEP (scm_equal_p (SCM_CAR (tmp), x)))
	return tmp;
    }
  return SCM_BOOL_F;
}
#undef FUNC_NAME




GUILE_PROC(scm_assq, "assq", 2, 0, 0,
           (SCM x, SCM alist),
"")
#define FUNC_NAME s_scm_assq
{
  SCM tmp;
  for(;SCM_NIMP(alist);alist = SCM_CDR(alist)) {
    SCM_VALIDATE_ALISTCELL_COPYSCM(2,alist,tmp);
    if (SCM_CAR(tmp)==x) return tmp;
  }
  SCM_VALIDATE_NULL(2,alist);
  return SCM_BOOL_F;
}
#undef FUNC_NAME


GUILE_PROC(scm_assv, "assv", 2, 0, 0,
           (SCM x, SCM alist),
"")
#define FUNC_NAME s_scm_assv
{
  SCM tmp;
  for(;SCM_NIMP(alist);alist = SCM_CDR(alist)) {
    SCM_ASRTGO(SCM_CONSP(alist), badlst);
    tmp = SCM_CAR(alist);
    SCM_ASRTGO(SCM_NIMP(tmp) && SCM_CONSP(tmp), badlst);
    if SCM_NFALSEP(scm_eqv_p(SCM_CAR(tmp), x)) return tmp;
  }
# ifndef SCM_RECKLESS
  if (!(SCM_NULLP(alist)))
    badlst: scm_wta(alist, (char *)SCM_ARG2, FUNC_NAME);
# endif
  return SCM_BOOL_F;
}
#undef FUNC_NAME


GUILE_PROC(scm_assoc, "assoc", 2, 0, 0,
           (SCM x, SCM alist),
"")
#define FUNC_NAME s_scm_assoc
{
  SCM tmp;
  for(;SCM_NIMP(alist);alist = SCM_CDR(alist)) {
    SCM_VALIDATE_ALISTCELL_COPYSCM(2,alist,tmp);
    if SCM_NFALSEP(scm_equal_p(SCM_CAR(tmp), x)) return tmp;
  }
  SCM_VALIDATE_NULL(2,alist);
  return SCM_BOOL_F;
}
#undef FUNC_NAME




GUILE_PROC (scm_assq_ref, "assq-ref", 2, 0, 0,
            (SCM alist, SCM key),
"")
#define FUNC_NAME s_scm_assq_ref
{
  SCM handle;

  handle = scm_sloppy_assq (key, alist);
  if (SCM_NIMP (handle) && SCM_CONSP (handle))
    {
      return SCM_CDR (handle);
    }
  return SCM_BOOL_F;
}
#undef FUNC_NAME


GUILE_PROC (scm_assv_ref, "assv-ref", 2, 0, 0,
            (SCM alist, SCM key),
"")
#define FUNC_NAME s_scm_assv_ref
{
  SCM handle;

  handle = scm_sloppy_assv (key, alist);
  if (SCM_NIMP (handle) && SCM_CONSP (handle))
    {
      return SCM_CDR (handle);
    }
  return SCM_BOOL_F;
}
#undef FUNC_NAME


GUILE_PROC (scm_assoc_ref, "assoc-ref", 2, 0, 0,
            (SCM alist, SCM key),
"")
#define FUNC_NAME s_scm_assoc_ref
{
  SCM handle;

  handle = scm_sloppy_assoc (key, alist);
  if (SCM_NIMP (handle) && SCM_CONSP (handle))
    {
      return SCM_CDR (handle);
    }
  return SCM_BOOL_F;
}
#undef FUNC_NAME






GUILE_PROC (scm_assq_set_x, "assq-set!", 3, 0, 0,
            (SCM alist, SCM key, SCM val),
"")
#define FUNC_NAME s_scm_assq_set_x
{
  SCM handle;

  handle = scm_sloppy_assq (key, alist);
  if (SCM_NIMP (handle) && SCM_CONSP (handle))
    {
      SCM_SETCDR (handle, val);
      return alist;
    }
  else
    return scm_acons (key, val, alist);
}
#undef FUNC_NAME

GUILE_PROC (scm_assv_set_x, "assv-set!", 3, 0, 0,
            (SCM alist, SCM key, SCM val),
"")
#define FUNC_NAME s_scm_assv_set_x
{
  SCM handle;

  handle = scm_sloppy_assv (key, alist);
  if (SCM_NIMP (handle) && SCM_CONSP (handle))
    {
      SCM_SETCDR (handle, val);
      return alist;
    }
  else
    return scm_acons (key, val, alist);
}
#undef FUNC_NAME

GUILE_PROC (scm_assoc_set_x, "assoc-set!", 3, 0, 0,
            (SCM alist, SCM key, SCM val),
"")
#define FUNC_NAME s_scm_assoc_set_x
{
  SCM handle;

  handle = scm_sloppy_assoc (key, alist);
  if (SCM_NIMP (handle) && SCM_CONSP (handle))
    {
      SCM_SETCDR (handle, val);
      return alist;
    }
  else
    return scm_acons (key, val, alist);
}
#undef FUNC_NAME




GUILE_PROC (scm_assq_remove_x, "assq-remove!", 2, 0, 0,
            (SCM alist, SCM key),
"")
#define FUNC_NAME s_scm_assq_remove_x
{
  SCM handle;

  handle = scm_sloppy_assq (key, alist);
  if (SCM_NIMP (handle) && SCM_CONSP (handle))
    {
      return scm_delq_x (handle, alist);
    }
  else
    return alist;
}
#undef FUNC_NAME


GUILE_PROC (scm_assv_remove_x, "assv-remove!", 2, 0, 0,
            (SCM alist, SCM key),
"")
#define FUNC_NAME s_scm_assv_remove_x
{
  SCM handle;

  handle = scm_sloppy_assv (key, alist);
  if (SCM_NIMP (handle) && SCM_CONSP (handle))
    {
      return scm_delv_x (handle, alist);
    }
  else
    return alist;
}
#undef FUNC_NAME


GUILE_PROC (scm_assoc_remove_x, "assoc-remove!", 2, 0, 0,
            (SCM alist, SCM key),
"")
#define FUNC_NAME s_scm_assoc_remove_x
{
  SCM handle;

  handle = scm_sloppy_assoc (key, alist);
  if (SCM_NIMP (handle) && SCM_CONSP (handle))
    {
      return scm_delete_x (handle, alist);
    }
  else
    return alist;
}
#undef FUNC_NAME






void
scm_init_alist ()
{
#include "alist.x"
}