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

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

\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_c_hook_t *hook, void *hook_data, scm_c_hook_type_t type)
{
  hook->first = 0;
  hook->type = type;
  hook->data = hook_data;
}

void
scm_c_hook_add (scm_c_hook_t *hook,
		scm_c_hook_function_t func,
		void *func_data, 
		int appendp)
{
  scm_c_hook_entry_t *entry = scm_must_malloc (sizeof (scm_c_hook_entry_t),
					     "C level hook entry");
  scm_c_hook_entry_t **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_c_hook_t *hook,
		   scm_c_hook_function_t func,
		   void *func_data)
{
  scm_c_hook_entry_t **loc = &hook->first;
  while (*loc)
    {
      if ((*loc)->func == func && (*loc)->data == func_data)
	{
	  scm_c_hook_entry_t *entry = *loc;
	  *loc = (*loc)->next;
	  scm_must_free (entry);
	  return;
	}
      loc = &(*loc)->next;
    }
  fprintf (stderr, "Attempt to remove non-existent hook function\n");
  abort ();
}

void *
scm_c_hook_run (scm_c_hook_t *hook, void *data)
{
  scm_c_hook_entry_t *entry = hook->first;
  scm_c_hook_type_t 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_bits_t scm_tc16_hook;


static SCM
make_hook (SCM n_args, const char *subr)
{
  int n;

  if (SCM_UNBNDP (n_args))
    {
      n = 0;
    }
  else
    {
      SCM_ASSERT (SCM_INUMP (n_args), n_args, SCM_ARGn, subr);
      n = SCM_INUM (n_args);
      if (n < 0 || n > 16)
	scm_out_of_range (subr, n_args);
    }
  SCM_RETURN_NEWSMOB (scm_tc16_hook + (n << 16), SCM_UNPACK (SCM_EOL));
}


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
scm_create_hook (const char* name, int n_args)
{
  SCM hook = make_hook (SCM_MAKINUM (n_args), "scm_create_hook");
  scm_c_define (name, hook);
  scm_protect_object (hook);
  return hook;
}


SCM_DEFINE (scm_make_hook, "make-hook", 0, 1, 0, 
            (SCM n_args),
	    "Create a hook for storing procedure of arity\n"
	    "@var{n_args}.  @var{n_args} defaults to zero.")
#define FUNC_NAME s_scm_make_hook
{
  return make_hook (n_args, FUNC_NAME);
}
#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.")
#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_LIST2 (rest, SCM_LIST1 (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}.")
#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}.")
#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.")
#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_LIST2 (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 (SCM_CAR (procs), args, SCM_EOL);
      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);
#ifndef SCM_MAGIC_SNARFER
#include "libguile/hooks.x"
#endif
}

/*
  Local Variables:
  c-file-style: "gnu"
  End:
*/
Commit	Line	Data
56e55ac7	1	/* Copyright (C) 1995,1996,1998,1999,2000,2001 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
	42	/* Software engineering face-lift by Greg J. Badros, 11-Dec-1999,
	43	gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */
	44
	45	\f
	46
	47	#include <stdio.h>
	48	#include "libguile/_scm.h"
	49
	50	#include "libguile/eval.h"
	51	#include "libguile/ports.h"
	52	#include "libguile/procprop.h"
	53	#include "libguile/root.h"
	54	#include "libguile/smob.h"
	55	#include "libguile/strings.h"
	56
	57	#include "libguile/validate.h"
	58	#include "libguile/hooks.h"
	59
	60	\f
	61	/* C level hooks
	62	*
	63	* Currently, this implementation is separate from the Scheme level
	64	* hooks. The possibility exists to implement the Scheme level hooks
	65	* using C level hooks.
66	*/
67
68	void
69	scm_c_hook_init (scm_c_hook_t hook, void hook_data, scm_c_hook_type_t type)
70	{
71	hook->first = 0;
72	hook->type = type;
73	hook->data = hook_data;
74	}
75
76	void
77	scm_c_hook_add (scm_c_hook_t *hook,
78	scm_c_hook_function_t func,
79	void *func_data,
80	int appendp)
81	{
82	scm_c_hook_entry_t *entry = scm_must_malloc (sizeof (scm_c_hook_entry_t),
83	"C level hook entry");
84	scm_c_hook_entry_t **loc = &hook->first;
85	if (appendp)
86	while (*loc)
87	loc = (loc)->next;
88	entry->next = *loc;
89	entry->func = func;
90	entry->data = func_data;
91	*loc = entry;
92	}
93
94	void
95	scm_c_hook_remove (scm_c_hook_t *hook,
96	scm_c_hook_function_t func,
97	void *func_data)
98	{
99	scm_c_hook_entry_t **loc = &hook->first;
100	while (*loc)
101	{
102	if ((loc)->func == func && (loc)->data == func_data)
103	{
104	scm_c_hook_entry_t entry = loc;
105	loc = (loc)->next;
106	scm_must_free (entry);
107	return;
108	}
109	loc = &(*loc)->next;
110	}
111	fprintf (stderr, "Attempt to remove non-existent hook function\n");
112	abort ();
113	}
114
115	void *
116	scm_c_hook_run (scm_c_hook_t hook, void data)
117	{
118	scm_c_hook_entry_t *entry = hook->first;
119	scm_c_hook_type_t type = hook->type;
120	void *res = 0;
121	while (entry)
122	{
123	res = (entry->func) (hook->data, entry->data, data);
124	if (res)
125	{
126	if (type == SCM_C_HOOK_OR)
127	break;
128	}
129	else
130	{
131	if (type == SCM_C_HOOK_AND)
132	break;
133	}
134	entry = entry->next;
135	}
136	return res;
137	}
138
139	\f
140	/* Scheme level hooks
141	*
142	* A hook is basically a list of procedures to be called at well defined
143	* points in time.
144	*
e11f8b42 DH	145	* Hook arity is not a full member of this type and therefore lacks an
	146	* accessor. It exists to aid debugging and is not intended to be used in
	147	* programs.
abd95148 MD	148	*/
abd95148 MD	149
e841c3e0	150	scm_bits_t scm_tc16_hook;
abd95148 MD	151
	152
	153	static SCM
e11f8b42	154	make_hook (SCM n_args, const char *subr)
abd95148 MD	155	{
abd95148 MD	156	int n;
e11f8b42	157
abd95148	158	if (SCM_UNBNDP (n_args))
e11f8b42 DH	159	{
	160	n = 0;
	161	}
abd95148 MD	162	else
	163	{
	164	SCM_ASSERT (SCM_INUMP (n_args), n_args, SCM_ARGn, subr);
	165	n = SCM_INUM (n_args);
685c0d71 DH	166	if (n < 0 \|\| n > 16)
685c0d71 DH	167	scm_out_of_range (subr, n_args);
abd95148	168	}
78a3503e	169	SCM_RETURN_NEWSMOB (scm_tc16_hook + (n << 16), SCM_UNPACK (SCM_EOL));
abd95148 MD	170	}
	171
	172
	173	static int
e841c3e0	174	hook_print (SCM hook, SCM port, scm_print_state *pstate)
abd95148 MD	175	{
	176	SCM ls, name;
	177	scm_puts ("#<hook ", port);
abd95148 MD	178	scm_intprint (SCM_HOOK_ARITY (hook), 10, port);
	179	scm_putc (' ', port);
	180	scm_intprint (SCM_UNPACK (hook), 16, port);
	181	ls = SCM_HOOK_PROCEDURES (hook);
	182	while (SCM_NIMP (ls))
	183	{
	184	scm_putc (' ', port);
	185	name = scm_procedure_name (SCM_CAR (ls));
56e55ac7	186	if (!SCM_FALSEP (name))
abd95148 MD	187	scm_iprin1 (name, port, pstate);
	188	else
	189	scm_putc ('?', port);
	190	ls = SCM_CDR (ls);
	191	}
	192	scm_putc ('>', port);
	193	return 1;
	194	}
	195
	196
	197	SCM
	198	scm_create_hook (const char* name, int n_args)
	199	{
e11f8b42	200	SCM hook = make_hook (SCM_MAKINUM (n_args), "scm_create_hook");
86d31dfe	201	scm_c_define (name, hook);
f8eaf8b9	202	scm_protect_object (hook);
abd95148 MD	203	return hook;
	204	}
	205
	206
abd95148 MD	207	SCM_DEFINE (scm_make_hook, "make-hook", 0, 1, 0,
abd95148 MD	208	(SCM n_args),
4d66be54 MG	209	"Create a hook for storing procedure of arity\n"
4d66be54 MG	210	"@var{n_args}. @var{n_args} defaults to zero.")
abd95148 MD	211	#define FUNC_NAME s_scm_make_hook
abd95148 MD	212	{
e11f8b42	213	return make_hook (n_args, FUNC_NAME);
abd95148 MD	214	}
	215	#undef FUNC_NAME
	216
	217
	218	SCM_DEFINE (scm_hook_p, "hook?", 1, 0, 0,
	219	(SCM x),
4d66be54	220	"Return @code{#t} if @var{x} is a hook, @code{#f} otherwise.")
abd95148 MD	221	#define FUNC_NAME s_scm_hook_p
	222	{
	223	return SCM_BOOL (SCM_HOOKP (x));
	224	}
	225	#undef FUNC_NAME
	226
	227
	228	SCM_DEFINE (scm_hook_empty_p, "hook-empty?", 1, 0, 0,
	229	(SCM hook),
4d66be54 MG	230	"Return @code{#t} if @var{hook} is an empty hook, @code{#f}\n"
4d66be54 MG	231	"otherwise.")
abd95148 MD	232	#define FUNC_NAME s_scm_hook_empty_p
	233	{
	234	SCM_VALIDATE_HOOK (1, hook);
	235	return SCM_BOOL (SCM_NULLP (SCM_HOOK_PROCEDURES (hook)));
	236	}
	237	#undef FUNC_NAME
	238
	239
	240	SCM_DEFINE (scm_add_hook_x, "add-hook!", 2, 1, 0,
	241	(SCM hook, SCM proc, SCM append_p),
8d1b3ae9 MG	242	"Add the procedure @var{proc} to the hook @var{hook}. The\n"
	243	"procedure is added to the end if @var{append_p} is true,\n"
	244	"otherwise it is added to the front.")
abd95148 MD	245	#define FUNC_NAME s_scm_add_hook_x
	246	{
	247	SCM arity, rest;
	248	int n_args;
	249	SCM_VALIDATE_HOOK (1,hook);
8ff45739	250	SCM_ASSERT (!SCM_FALSEP (arity = scm_i_procedure_arity (proc)),
abd95148 MD	251	proc, SCM_ARG2, FUNC_NAME);
	252	n_args = SCM_HOOK_ARITY (hook);
	253	if (SCM_INUM (SCM_CAR (arity)) > n_args
	254	\|\| (SCM_FALSEP (SCM_CADDR (arity))
	255	&& (SCM_INUM (SCM_CAR (arity)) + SCM_INUM (SCM_CADR (arity))
	256	< n_args)))
	257	scm_wrong_type_arg (FUNC_NAME, 2, proc);
	258	rest = scm_delq_x (proc, SCM_HOOK_PROCEDURES (hook));
	259	SCM_SET_HOOK_PROCEDURES (hook,
e11f8b42	260	(!SCM_UNBNDP (append_p) && !SCM_FALSEP (append_p)
abd95148 MD	261	? scm_append_x (SCM_LIST2 (rest, SCM_LIST1 (proc)))
	262	: scm_cons (proc, rest)));
	263	return SCM_UNSPECIFIED;
	264	}
	265	#undef FUNC_NAME
	266
	267
	268	SCM_DEFINE (scm_remove_hook_x, "remove-hook!", 2, 0, 0,
	269	(SCM hook, SCM proc),
8d1b3ae9	270	"Remove the procedure @var{proc} from the hook @var{hook}.")
abd95148 MD	271	#define FUNC_NAME s_scm_remove_hook_x
	272	{
	273	SCM_VALIDATE_HOOK (1, hook);
	274	SCM_SET_HOOK_PROCEDURES (hook,
	275	scm_delq_x (proc, SCM_HOOK_PROCEDURES (hook)));
	276	return SCM_UNSPECIFIED;
	277	}
	278	#undef FUNC_NAME
	279
	280
	281	SCM_DEFINE (scm_reset_hook_x, "reset-hook!", 1, 0, 0,
	282	(SCM hook),
8d1b3ae9	283	"Remove all procedures from the hook @var{hook}.")
abd95148 MD	284	#define FUNC_NAME s_scm_reset_hook_x
	285	{
	286	SCM_VALIDATE_HOOK (1,hook);
	287	SCM_SET_HOOK_PROCEDURES (hook, SCM_EOL);
	288	return SCM_UNSPECIFIED;
	289	}
	290	#undef FUNC_NAME
	291
	292
	293	SCM_DEFINE (scm_run_hook, "run-hook", 1, 0, 1,
	294	(SCM hook, SCM args),
8d1b3ae9	295	"Apply all procedures from the hook @var{hook} to the arguments\n"
4d66be54 MG	296	"@var{args}. The order of the procedure application is first to\n"
4d66be54 MG	297	"last.")
abd95148 MD	298	#define FUNC_NAME s_scm_run_hook
	299	{
	300	SCM_VALIDATE_HOOK (1,hook);
abd95148 MD	301	if (scm_ilength (args) != SCM_HOOK_ARITY (hook))
	302	SCM_MISC_ERROR ("Hook ~S requires ~A arguments",
	303	SCM_LIST2 (hook,SCM_MAKINUM (SCM_HOOK_ARITY (hook))));
	304	scm_c_run_hook (hook, args);
	305	return SCM_UNSPECIFIED;
	306	}
	307	#undef FUNC_NAME
	308
	309
	310	void
	311	scm_c_run_hook (SCM hook, SCM args)
	312	{
	313	SCM procs = SCM_HOOK_PROCEDURES (hook);
	314	while (SCM_NIMP (procs))
	315	{
	316	scm_apply (SCM_CAR (procs), args, SCM_EOL);
	317	procs = SCM_CDR (procs);
	318	}
	319	}
	320
	321
	322	SCM_DEFINE (scm_hook_to_list, "hook->list", 1, 0, 0,
	323	(SCM hook),
8d1b3ae9	324	"Convert the procedure list of @var{hook} to a list.")
abd95148 MD	325	#define FUNC_NAME s_scm_hook_to_list
	326	{
	327	SCM_VALIDATE_HOOK (1, hook);
	328	return scm_list_copy (SCM_HOOK_PROCEDURES (hook));
	329	}
	330	#undef FUNC_NAME
	331
	332
	333	\f
	334
	335	void
	336	scm_init_hooks ()
	337	{
	338	scm_tc16_hook = scm_make_smob_type ("hook", 0);
	339	scm_set_smob_mark (scm_tc16_hook, scm_markcdr);
e841c3e0	340	scm_set_smob_print (scm_tc16_hook, hook_print);
8dc9439f	341	#ifndef SCM_MAGIC_SNARFER
abd95148	342	#include "libguile/hooks.x"
8dc9439f	343	#endif
abd95148 MD	344	}
	345
	346	/*
	347	Local Variables:
	348	c-file-style: "gnu"
	349	End:
	350	*/