[bpt/guile.git] / libguile / hooks.c

/* Copyright (C) 1995,1996,1998,1999,2000,2001, 2003 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.  */


\f

#include <stdio.h>
#include "libguile/_scm.h"

#include "libguile/eval.h"
#include "libguile/ports.h"
#include "libguile/procprop.h"
#include "libguile/root.h"
#include "libguile/smob.h"
#include "libguile/strings.h"

#include "libguile/validate.h"
#include "libguile/hooks.h"

\f
/* C level hooks
 *
 * Currently, this implementation is separate from the Scheme level
 * hooks.  The possibility exists to implement the Scheme level hooks
 * using C level hooks.
 */

void
scm_c_hook_init (scm_t_c_hook *hook, void *hook_data, scm_t_c_hook_type type)
{
  hook->first = 0;
  hook->type = type;
  hook->data = hook_data;
}

void
scm_c_hook_add (scm_t_c_hook *hook,
		scm_t_c_hook_function func,
		void *func_data, 
		int appendp)
{
  scm_t_c_hook_entry *entry = scm_malloc (sizeof (scm_t_c_hook_entry));
  scm_t_c_hook_entry **loc = &hook->first;
  if (appendp)
    while (*loc)
      loc = &(*loc)->next;
  entry->next = *loc;
  entry->func = func;
  entry->data = func_data;
  *loc = entry;
}

void
scm_c_hook_remove (scm_t_c_hook *hook,
		   scm_t_c_hook_function func,
		   void *func_data)
{
  scm_t_c_hook_entry **loc = &hook->first;
  while (*loc)
    {
      if ((*loc)->func == func && (*loc)->data == func_data)
	{
	  scm_t_c_hook_entry *entry = *loc;
	  *loc = (*loc)->next;
	  free (entry);
	  return;
	}
      loc = &(*loc)->next;
    }
  fprintf (stderr, "Attempt to remove non-existent hook function\n");
  abort ();
}

void *
scm_c_hook_run (scm_t_c_hook *hook, void *data)
{
  scm_t_c_hook_entry *entry = hook->first;
  scm_t_c_hook_type type = hook->type;
  void *res = 0;
  while (entry)
    {
      res = (entry->func) (hook->data, entry->data, data);
      if (res)
	{
	  if (type == SCM_C_HOOK_OR)
	    break;
	}
      else
	{
	  if (type == SCM_C_HOOK_AND)
	    break;
	}
      entry = entry->next;
    }
  return res;
}

\f
/* Scheme level hooks
 *
 * A hook is basically a list of procedures to be called at well defined
 * points in time.
 *
 * Hook arity is not a full member of this type and therefore lacks an
 * accessor.  It exists to aid debugging and is not intended to be used in
 * programs.
 */

scm_t_bits scm_tc16_hook;


static int
hook_print (SCM hook, SCM port, scm_print_state *pstate)
{
  SCM ls, name;
  scm_puts ("#<hook ", port);
  scm_intprint (SCM_HOOK_ARITY (hook), 10, port);
  scm_putc (' ', port);
  scm_intprint (SCM_UNPACK (hook), 16, port);
  ls = SCM_HOOK_PROCEDURES (hook);
  while (SCM_NIMP (ls))
    {
      scm_putc (' ', port);
      name = scm_procedure_name (SCM_CAR (ls));
      if (!SCM_FALSEP (name))
	scm_iprin1 (name, port, pstate);
      else
	scm_putc ('?', port);
      ls = SCM_CDR (ls);
    }
  scm_putc ('>', port);
  return 1;
}


SCM_DEFINE (scm_make_hook, "make-hook", 0, 1, 0, 
            (SCM n_args),
	    "Create a hook for storing procedure of arity @var{n_args}.\n"
	    "@var{n_args} defaults to zero.  The returned value is a hook\n"
	    "object to be used with the other hook procedures.")
#define FUNC_NAME s_scm_make_hook
{
  int n;

  if (SCM_UNBNDP (n_args))
    {
      n = 0;
    }
  else
    {
      SCM_VALIDATE_INUM_COPY (SCM_ARG1, n_args, n);
      if (n < 0 || n > 16)
	SCM_OUT_OF_RANGE (SCM_ARG1, n_args);
    }
  
  SCM_RETURN_NEWSMOB (scm_tc16_hook + (n << 16), SCM_UNPACK (SCM_EOL));
}
#undef FUNC_NAME


SCM_DEFINE (scm_hook_p, "hook?", 1, 0, 0, 
            (SCM x),
	    "Return @code{#t} if @var{x} is a hook, @code{#f} otherwise.")
#define FUNC_NAME s_scm_hook_p
{
  return SCM_BOOL (SCM_HOOKP (x));
}
#undef FUNC_NAME


SCM_DEFINE (scm_hook_empty_p, "hook-empty?", 1, 0, 0, 
            (SCM hook),
	    "Return @code{#t} if @var{hook} is an empty hook, @code{#f}\n"
	    "otherwise.")
#define FUNC_NAME s_scm_hook_empty_p
{
  SCM_VALIDATE_HOOK (1, hook);
  return SCM_BOOL (SCM_NULLP (SCM_HOOK_PROCEDURES (hook)));
}
#undef FUNC_NAME


SCM_DEFINE (scm_add_hook_x, "add-hook!", 2, 1, 0, 
            (SCM hook, SCM proc, SCM append_p),
	    "Add the procedure @var{proc} to the hook @var{hook}. The\n"
	    "procedure is added to the end if @var{append_p} is true,\n"
	    "otherwise it is added to the front.  The return value of this\n"
	    "procedure is not specified.")
#define FUNC_NAME s_scm_add_hook_x
{
  SCM arity, rest;
  int n_args;
  SCM_VALIDATE_HOOK (1, hook);
  SCM_ASSERT (!SCM_FALSEP (arity = scm_i_procedure_arity (proc)),
	      proc, SCM_ARG2, FUNC_NAME);
  n_args = SCM_HOOK_ARITY (hook);
  if (SCM_INUM (SCM_CAR (arity)) > n_args
      || (SCM_FALSEP (SCM_CADDR (arity))
	  && (SCM_INUM (SCM_CAR (arity)) + SCM_INUM (SCM_CADR (arity))
	      < n_args)))
    scm_wrong_type_arg (FUNC_NAME, 2, proc);
  rest = scm_delq_x (proc, SCM_HOOK_PROCEDURES (hook));
  SCM_SET_HOOK_PROCEDURES (hook,
			   (!SCM_UNBNDP (append_p) && !SCM_FALSEP (append_p)
			    ? scm_append_x (scm_list_2 (rest, scm_list_1 (proc)))
			    : scm_cons (proc, rest)));
  return SCM_UNSPECIFIED;
}
#undef FUNC_NAME


SCM_DEFINE (scm_remove_hook_x, "remove-hook!", 2, 0, 0, 
            (SCM hook, SCM proc),
	    "Remove the procedure @var{proc} from the hook @var{hook}.  The\n"
	    "return value of this procedure is not specified.")
#define FUNC_NAME s_scm_remove_hook_x
{
  SCM_VALIDATE_HOOK (1, hook);
  SCM_SET_HOOK_PROCEDURES (hook,
			   scm_delq_x (proc, SCM_HOOK_PROCEDURES (hook)));
  return SCM_UNSPECIFIED;
}
#undef FUNC_NAME


SCM_DEFINE (scm_reset_hook_x, "reset-hook!", 1, 0, 0, 
            (SCM hook),
	    "Remove all procedures from the hook @var{hook}.  The return\n"
	    "value of this procedure is not specified.")
#define FUNC_NAME s_scm_reset_hook_x
{
  SCM_VALIDATE_HOOK (1, hook);
  SCM_SET_HOOK_PROCEDURES (hook, SCM_EOL);
  return SCM_UNSPECIFIED;
}
#undef FUNC_NAME


SCM_DEFINE (scm_run_hook, "run-hook", 1, 0, 1, 
            (SCM hook, SCM args),
	    "Apply all procedures from the hook @var{hook} to the arguments\n"
	    "@var{args}.  The order of the procedure application is first to\n"
	    "last.  The return value of this procedure is not specified.")
#define FUNC_NAME s_scm_run_hook
{
  SCM_VALIDATE_HOOK (1, hook);
  if (scm_ilength (args) != SCM_HOOK_ARITY (hook))
    SCM_MISC_ERROR ("Hook ~S requires ~A arguments",
		    scm_list_2 (hook, SCM_MAKINUM (SCM_HOOK_ARITY (hook))));
  scm_c_run_hook (hook, args);
  return SCM_UNSPECIFIED;
}
#undef FUNC_NAME


void
scm_c_run_hook (SCM hook, SCM args)
{
  SCM procs = SCM_HOOK_PROCEDURES (hook);
  while (SCM_NIMP (procs))
    {
      scm_apply_0 (SCM_CAR (procs), args);
      procs = SCM_CDR (procs);
    }
}


SCM_DEFINE (scm_hook_to_list, "hook->list", 1, 0, 0, 
            (SCM hook),
	    "Convert the procedure list of @var{hook} to a list.")
#define FUNC_NAME s_scm_hook_to_list
{
  SCM_VALIDATE_HOOK (1, hook);
  return scm_list_copy (SCM_HOOK_PROCEDURES (hook));
}
#undef FUNC_NAME


\f

void
scm_init_hooks ()
{
  scm_tc16_hook = scm_make_smob_type ("hook", 0);
  scm_set_smob_mark (scm_tc16_hook, scm_markcdr);
  scm_set_smob_print (scm_tc16_hook, hook_print);
#include "libguile/hooks.x"
}

/*
  Local Variables:
  c-file-style: "gnu"
  End:
*/
Commit	Line	Data
c35738c1	1	/* Copyright (C) 1995,1996,1998,1999,2000,2001, 2003 Free Software Foundation, Inc.
abd95148 MD	2	*
	3	* This program is free software; you can redistribute it and/or modify
	4	* it under the terms of the GNU General Public License as published by
	5	* the Free Software Foundation; either version 2, or (at your option)
	6	* any later version.
	7	*
	8	* This program is distributed in the hope that it will be useful,
	9	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	10	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	11	* GNU General Public License for more details.
	12	*
	13	* You should have received a copy of the GNU General Public License
	14	* along with this software; see the file COPYING. If not, write to
	15	* the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
	16	* Boston, MA 02111-1307 USA
	17	*
	18	* As a special exception, the Free Software Foundation gives permission
	19	* for additional uses of the text contained in its release of GUILE.
	20	*
	21	* The exception is that, if you link the GUILE library with other files
	22	* to produce an executable, this does not by itself cause the
	23	* resulting executable to be covered by the GNU General Public License.
	24	* Your use of that executable is in no way restricted on account of
	25	* linking the GUILE library code into it.
	26	*
	27	* This exception does not however invalidate any other reasons why
	28	* the executable file might be covered by the GNU General Public License.
	29	*
	30	* This exception applies only to the code released by the
	31	* Free Software Foundation under the name GUILE. If you copy
	32	* code from other Free Software Foundation releases into a copy of
	33	* GUILE, as the General Public License permits, the exception does
	34	* not apply to the code that you add in this way. To avoid misleading
	35	* anyone as to the status of such modified files, you must delete
	36	* this exception notice from them.
	37	*
	38	* If you write modifications of your own for GUILE, it is your choice
	39	* whether to permit this exception to apply to your modifications.
	40	* If you do not wish that, delete this exception notice. */
	41
abd95148 MD	42
	43	\f
	44
	45	#include <stdio.h>
	46	#include "libguile/_scm.h"
	47
	48	#include "libguile/eval.h"
	49	#include "libguile/ports.h"
	50	#include "libguile/procprop.h"
	51	#include "libguile/root.h"
	52	#include "libguile/smob.h"
	53	#include "libguile/strings.h"
	54
	55	#include "libguile/validate.h"
	56	#include "libguile/hooks.h"
	57
	58	\f
	59	/* C level hooks
	60	*
	61	* Currently, this implementation is separate from the Scheme level
	62	* hooks. The possibility exists to implement the Scheme level hooks
	63	* using C level hooks.
	64	*/
	65
	66	void
387d418c	67	scm_c_hook_init (scm_t_c_hook hook, void hook_data, scm_t_c_hook_type type)
abd95148 MD	68	{
	69	hook->first = 0;
	70	hook->type = type;
	71	hook->data = hook_data;
	72	}
	73
	74	void
92c2555f MV	75	scm_c_hook_add (scm_t_c_hook *hook,
92c2555f MV	76	scm_t_c_hook_function func,
abd95148 MD	77	void *func_data,
	78	int appendp)
	79	{
4c9419ac	80	scm_t_c_hook_entry *entry = scm_malloc (sizeof (scm_t_c_hook_entry));
92c2555f	81	scm_t_c_hook_entry **loc = &hook->first;
abd95148 MD	82	if (appendp)
abd95148 MD	83	while (*loc)
c35738c1	84	loc = &(*loc)->next;
abd95148 MD	85	entry->next = *loc;
	86	entry->func = func;
	87	entry->data = func_data;
	88	*loc = entry;
	89	}
	90
	91	void
92c2555f MV	92	scm_c_hook_remove (scm_t_c_hook *hook,
92c2555f MV	93	scm_t_c_hook_function func,
abd95148 MD	94	void *func_data)
abd95148 MD	95	{
92c2555f	96	scm_t_c_hook_entry **loc = &hook->first;
abd95148 MD	97	while (*loc)
	98	{
	99	if ((loc)->func == func && (loc)->data == func_data)
	100	{
92c2555f	101	scm_t_c_hook_entry entry = loc;
abd95148	102	loc = (loc)->next;
4c9419ac	103	free (entry);
abd95148 MD	104	return;
	105	}
	106	loc = &(*loc)->next;
	107	}
	108	fprintf (stderr, "Attempt to remove non-existent hook function\n");
	109	abort ();
	110	}
	111
	112	void *
92c2555f	113	scm_c_hook_run (scm_t_c_hook hook, void data)
abd95148	114	{
92c2555f	115	scm_t_c_hook_entry *entry = hook->first;
387d418c	116	scm_t_c_hook_type type = hook->type;
abd95148 MD	117	void *res = 0;
	118	while (entry)
	119	{
	120	res = (entry->func) (hook->data, entry->data, data);
	121	if (res)
	122	{
	123	if (type == SCM_C_HOOK_OR)
	124	break;
	125	}
	126	else
	127	{
	128	if (type == SCM_C_HOOK_AND)
	129	break;
	130	}
	131	entry = entry->next;
	132	}
	133	return res;
	134	}
	135
	136	\f
	137	/* Scheme level hooks
	138	*
	139	* A hook is basically a list of procedures to be called at well defined
	140	* points in time.
	141	*
e11f8b42 DH	142	* Hook arity is not a full member of this type and therefore lacks an
	143	* accessor. It exists to aid debugging and is not intended to be used in
	144	* programs.
abd95148 MD	145	*/
abd95148 MD	146
92c2555f	147	scm_t_bits scm_tc16_hook;
abd95148 MD	148
abd95148 MD	149
abd95148	150	static int
e841c3e0	151	hook_print (SCM hook, SCM port, scm_print_state *pstate)
abd95148 MD	152	{
	153	SCM ls, name;
	154	scm_puts ("#<hook ", port);
abd95148 MD	155	scm_intprint (SCM_HOOK_ARITY (hook), 10, port);
	156	scm_putc (' ', port);
	157	scm_intprint (SCM_UNPACK (hook), 16, port);
	158	ls = SCM_HOOK_PROCEDURES (hook);
	159	while (SCM_NIMP (ls))
	160	{
	161	scm_putc (' ', port);
	162	name = scm_procedure_name (SCM_CAR (ls));
56e55ac7	163	if (!SCM_FALSEP (name))
abd95148 MD	164	scm_iprin1 (name, port, pstate);
	165	else
	166	scm_putc ('?', port);
	167	ls = SCM_CDR (ls);
	168	}
	169	scm_putc ('>', port);
	170	return 1;
	171	}
	172
abd95148	173
abd95148 MD	174	SCM_DEFINE (scm_make_hook, "make-hook", 0, 1, 0,
abd95148 MD	175	(SCM n_args),
f91e4547 MG	176	"Create a hook for storing procedure of arity @var{n_args}.\n"
	177	"@var{n_args} defaults to zero. The returned value is a hook\n"
	178	"object to be used with the other hook procedures.")
abd95148 MD	179	#define FUNC_NAME s_scm_make_hook
abd95148 MD	180	{
fde50407 ML	181	int n;
	182
	183	if (SCM_UNBNDP (n_args))
	184	{
	185	n = 0;
	186	}
	187	else
	188	{
	189	SCM_VALIDATE_INUM_COPY (SCM_ARG1, n_args, n);
	190	if (n < 0 \|\| n > 16)
	191	SCM_OUT_OF_RANGE (SCM_ARG1, n_args);
	192	}
	193
	194	SCM_RETURN_NEWSMOB (scm_tc16_hook + (n << 16), SCM_UNPACK (SCM_EOL));
abd95148 MD	195	}
	196	#undef FUNC_NAME
	197
	198
	199	SCM_DEFINE (scm_hook_p, "hook?", 1, 0, 0,
	200	(SCM x),
4d66be54	201	"Return @code{#t} if @var{x} is a hook, @code{#f} otherwise.")
abd95148 MD	202	#define FUNC_NAME s_scm_hook_p
	203	{
	204	return SCM_BOOL (SCM_HOOKP (x));
	205	}
	206	#undef FUNC_NAME
	207
	208
	209	SCM_DEFINE (scm_hook_empty_p, "hook-empty?", 1, 0, 0,
	210	(SCM hook),
4d66be54 MG	211	"Return @code{#t} if @var{hook} is an empty hook, @code{#f}\n"
4d66be54 MG	212	"otherwise.")
abd95148 MD	213	#define FUNC_NAME s_scm_hook_empty_p
	214	{
	215	SCM_VALIDATE_HOOK (1, hook);
	216	return SCM_BOOL (SCM_NULLP (SCM_HOOK_PROCEDURES (hook)));
	217	}
	218	#undef FUNC_NAME
	219
	220
	221	SCM_DEFINE (scm_add_hook_x, "add-hook!", 2, 1, 0,
	222	(SCM hook, SCM proc, SCM append_p),
8d1b3ae9 MG	223	"Add the procedure @var{proc} to the hook @var{hook}. The\n"
8d1b3ae9 MG	224	"procedure is added to the end if @var{append_p} is true,\n"
f91e4547 MG	225	"otherwise it is added to the front. The return value of this\n"
f91e4547 MG	226	"procedure is not specified.")
abd95148 MD	227	#define FUNC_NAME s_scm_add_hook_x
	228	{
	229	SCM arity, rest;
	230	int n_args;
34d19ef6	231	SCM_VALIDATE_HOOK (1, hook);
8ff45739	232	SCM_ASSERT (!SCM_FALSEP (arity = scm_i_procedure_arity (proc)),
abd95148 MD	233	proc, SCM_ARG2, FUNC_NAME);
	234	n_args = SCM_HOOK_ARITY (hook);
	235	if (SCM_INUM (SCM_CAR (arity)) > n_args
	236	\|\| (SCM_FALSEP (SCM_CADDR (arity))
	237	&& (SCM_INUM (SCM_CAR (arity)) + SCM_INUM (SCM_CADR (arity))
	238	< n_args)))
	239	scm_wrong_type_arg (FUNC_NAME, 2, proc);
	240	rest = scm_delq_x (proc, SCM_HOOK_PROCEDURES (hook));
	241	SCM_SET_HOOK_PROCEDURES (hook,
e11f8b42	242	(!SCM_UNBNDP (append_p) && !SCM_FALSEP (append_p)
1afff620	243	? scm_append_x (scm_list_2 (rest, scm_list_1 (proc)))
abd95148 MD	244	: scm_cons (proc, rest)));
	245	return SCM_UNSPECIFIED;
	246	}
	247	#undef FUNC_NAME
	248
	249
	250	SCM_DEFINE (scm_remove_hook_x, "remove-hook!", 2, 0, 0,
	251	(SCM hook, SCM proc),
f91e4547 MG	252	"Remove the procedure @var{proc} from the hook @var{hook}. The\n"
f91e4547 MG	253	"return value of this procedure is not specified.")
abd95148 MD	254	#define FUNC_NAME s_scm_remove_hook_x
	255	{
	256	SCM_VALIDATE_HOOK (1, hook);
	257	SCM_SET_HOOK_PROCEDURES (hook,
	258	scm_delq_x (proc, SCM_HOOK_PROCEDURES (hook)));
	259	return SCM_UNSPECIFIED;
	260	}
	261	#undef FUNC_NAME
	262
	263
	264	SCM_DEFINE (scm_reset_hook_x, "reset-hook!", 1, 0, 0,
	265	(SCM hook),
f91e4547 MG	266	"Remove all procedures from the hook @var{hook}. The return\n"
f91e4547 MG	267	"value of this procedure is not specified.")
abd95148 MD	268	#define FUNC_NAME s_scm_reset_hook_x
abd95148 MD	269	{
34d19ef6	270	SCM_VALIDATE_HOOK (1, hook);
abd95148 MD	271	SCM_SET_HOOK_PROCEDURES (hook, SCM_EOL);
	272	return SCM_UNSPECIFIED;
	273	}
	274	#undef FUNC_NAME
	275
	276
	277	SCM_DEFINE (scm_run_hook, "run-hook", 1, 0, 1,
	278	(SCM hook, SCM args),
8d1b3ae9	279	"Apply all procedures from the hook @var{hook} to the arguments\n"
4d66be54	280	"@var{args}. The order of the procedure application is first to\n"
f91e4547	281	"last. The return value of this procedure is not specified.")
abd95148 MD	282	#define FUNC_NAME s_scm_run_hook
abd95148 MD	283	{
34d19ef6	284	SCM_VALIDATE_HOOK (1, hook);
abd95148 MD	285	if (scm_ilength (args) != SCM_HOOK_ARITY (hook))
abd95148 MD	286	SCM_MISC_ERROR ("Hook ~S requires ~A arguments",
1afff620	287	scm_list_2 (hook, SCM_MAKINUM (SCM_HOOK_ARITY (hook))));
abd95148 MD	288	scm_c_run_hook (hook, args);
	289	return SCM_UNSPECIFIED;
	290	}
	291	#undef FUNC_NAME
	292
	293
	294	void
	295	scm_c_run_hook (SCM hook, SCM args)
	296	{
	297	SCM procs = SCM_HOOK_PROCEDURES (hook);
	298	while (SCM_NIMP (procs))
	299	{
fdc28395	300	scm_apply_0 (SCM_CAR (procs), args);
abd95148 MD	301	procs = SCM_CDR (procs);
	302	}
	303	}
	304
	305
	306	SCM_DEFINE (scm_hook_to_list, "hook->list", 1, 0, 0,
	307	(SCM hook),
8d1b3ae9	308	"Convert the procedure list of @var{hook} to a list.")
abd95148 MD	309	#define FUNC_NAME s_scm_hook_to_list
	310	{
	311	SCM_VALIDATE_HOOK (1, hook);
	312	return scm_list_copy (SCM_HOOK_PROCEDURES (hook));
	313	}
	314	#undef FUNC_NAME
	315
	316
	317	\f
	318
	319	void
	320	scm_init_hooks ()
	321	{
	322	scm_tc16_hook = scm_make_smob_type ("hook", 0);
	323	scm_set_smob_mark (scm_tc16_hook, scm_markcdr);
e841c3e0	324	scm_set_smob_print (scm_tc16_hook, hook_print);
abd95148 MD	325	#include "libguile/hooks.x"
	326	}
	327
	328	/*
	329	Local Variables:
	330	c-file-style: "gnu"
	331	End:
	332	*/