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

/*	Copyright (C) 1995,1996 Mikael Djurfeldt
 * 
 * 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, 675 Mass Ave, Cambridge, MA 02139, 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.
 *
 * The author can be reached at djurfeldt@nada.kth.se
 * Mikael Djurfeldt, SANS/NADA KTH, 10044 STOCKHOLM, SWEDEN
 */
\f

#include <stdio.h>
#include "_scm.h"
#include "smob.h"
#include "alist.h"
#include "debug.h"
#include "hashtab.h"
#include "hash.h"
#include "weaks.h"

#include "srcprop.h"
\f
/* {Source Properties}
 *
 * Properties of source list expressions.
 * Five of these have special meaning and optimized storage:
 *
 * filename    string   The name of the source file.
 * copy        list     A copy of the list expression.
 * line	       integer	The source code line number.
 * column      integer	The source code column number.
 * breakpoint  boolean	Sets a breakpoint on this form.
 *
 * Most properties above can be set by the reader.
 *
 */

SCM scm_i_copy;
static SCM scm_i_breakpoint, scm_i_line, scm_i_column;
static SCM scm_i_filename;

long scm_tc16_srcprops;
static scm_srcprops_chunk *srcprops_chunklist = 0;
static scm_srcprops *srcprops_freelist = 0;

#ifdef __STDC__
static SCM
marksrcprops (SCM obj)
#else
static SCM
marksrcprops (obj)
     SCM obj;
#endif
{
  SCM_SETGC8MARK (obj);
  scm_gc_mark (SRCPROPFNAME (obj));
  scm_gc_mark (SRCPROPCOPY (obj));
  return SRCPROPPLIST (obj);
}

#ifdef __STDC__
static scm_sizet
freesrcprops (SCM obj)
#else
static scm_sizet
freesrcprops (obj)
     SCM obj;
#endif
{
  *((scm_srcprops **) SCM_CDR (obj)) = srcprops_freelist;
  srcprops_freelist = (scm_srcprops *) SCM_CDR (obj);
  return 0; /* srcprops_chunks are not freed until leaving guile */
}

#ifdef __STDC__
static int
prinsrcprops (SCM obj, SCM port, scm_print_state *pstate)
#else
static int
prinsrcprops (obj, port, pstate)
     SCM obj;
     SCM port;
     scm_print_state *pstate;
#endif
{
  int writingp = SCM_WRITINGP (pstate);
  scm_gen_puts (scm_regular_string, "#<srcprops ", port);
  SCM_SET_WRITINGP (pstate, 1);
  scm_iprin1 (scm_srcprops_to_plist (obj), port, pstate);
  SCM_SET_WRITINGP (pstate, writingp);
  scm_gen_putc ('>', port);
  return 1;
}

static scm_smobfuns srcpropssmob =
{marksrcprops, freesrcprops, prinsrcprops, 0};

#ifdef __STDC__
SCM
scm_make_srcprops (int line, int col, SCM filename, SCM copy, SCM plist)
#else
SCM
scm_make_srcprops (line, col, filename, copy, plist)
     int line;
     int col;
     SCM filename;
     SCM copy;
     SCM plist;
#endif
{
  register SCM ans;
  register scm_srcprops *ptr;
  SCM_DEFER_INTS;
  if ((ptr = srcprops_freelist) != NULL)
    srcprops_freelist = *(scm_srcprops **)ptr;
  else
    {
      int i;
      scm_srcprops_chunk *mem;
      scm_sizet n = sizeof (scm_srcprops_chunk)
	            + sizeof (scm_srcprops) * (SRCPROPS_CHUNKSIZE - 1);
      SCM_SYSCALL (mem = (scm_srcprops_chunk *) malloc (n));
      SCM_ASSERT (mem, SCM_UNDEFINED, SCM_NALLOC, "srcprops");
      scm_mallocated += n;
      mem->next = srcprops_chunklist;
      srcprops_chunklist = mem;
      ptr = &mem->srcprops[0];
      for (i = 1; i < SRCPROPS_CHUNKSIZE - 1; ++i)
	*(scm_srcprops **)&ptr[i] = &ptr[i + 1];
      *(scm_srcprops **)&ptr[SRCPROPS_CHUNKSIZE - 1] = 0;
      srcprops_freelist = (scm_srcprops *) &ptr[1];
    }
  SCM_NEWCELL (ans);
  SCM_CAR (ans) = scm_tc16_srcprops;
  ptr->pos = SRCPROPMAKPOS (line, col);
  ptr->fname = filename;
  ptr->copy = copy;
  ptr->plist = plist;
  SCM_CDR (ans) = (SCM) ptr;
  SCM_ALLOW_INTS;
  return ans;
}

#ifdef __STDC__
SCM
scm_srcprops_to_plist (SCM obj)
#else
SCM
scm_srcprops_to_plist (obj)
     SCM obj;
#endif
{
  SCM plist = SRCPROPPLIST (obj);
  if (!SCM_UNBNDP (SRCPROPCOPY (obj)))
    plist = scm_acons (scm_i_copy, SRCPROPCOPY (obj), plist);
  if (!SCM_UNBNDP (SRCPROPFNAME (obj)))
    plist = scm_acons (scm_i_filename, SRCPROPFNAME (obj), plist);
  plist = scm_acons (scm_i_column, SCM_MAKINUM (SRCPROPCOL (obj)), plist);
  plist = scm_acons (scm_i_line, SCM_MAKINUM (SRCPROPLINE (obj)), plist);
  plist = scm_acons (scm_i_breakpoint, SRCPROPBRK (obj), plist);
  return plist;
}

SCM_PROC (s_source_properties, "source-properties", 1, 0, 0, scm_source_properties);
#ifdef __STDC__
SCM
scm_source_properties (SCM obj)
#else
SCM
scm_source_properties (obj)
     SCM obj;
#endif
{
  SCM p;
  if (SCM_MEMOIZEDP (obj))
    obj = SCM_MEMOEXP (obj);
  p = scm_hashq_ref (scm_source_whash, obj, (SCM) NULL);
  if (p != (SCM) NULL && SRCPROPSP (p))
    return scm_srcprops_to_plist (p);
  return SCM_EOL;
}

/* Perhaps this procedure should look through an alist
   and try to make a srcprops-object...? */
SCM_PROC (s_set_source_properties_x, "set-source-properties!", 2, 0, 0, scm_set_source_properties_x);
#ifdef __STDC__
SCM
scm_set_source_properties_x (SCM obj, SCM plist)
#else
SCM
scm_set_source_properties_x (obj, plist)
     SCM obj;
     SCM plist;
#endif
{
  SCM handle;
  if (SCM_MEMOIZEDP (obj))
    obj = SCM_MEMOEXP (obj);
  handle = scm_hashq_create_handle_x (scm_source_whash, obj, plist);
  SCM_SETCDR (handle, plist);
  return plist;
}

SCM_PROC (s_source_property, "source-property", 2, 0, 0, scm_source_property);
#ifdef __STDC__
SCM
scm_source_property (SCM obj, SCM key)
#else
SCM
scm_source_property (obj, key)
     SCM obj;
     SCM key;
#endif
{
  SCM p;
  if (SCM_MEMOIZEDP (obj))
    obj = SCM_MEMOEXP (obj);
  p = scm_hashq_ref (scm_source_whash, obj, SCM_EOL);
  if (SCM_IMP (p) || !SRCPROPSP (p))
    goto plist;
  if      (scm_i_breakpoint == key) p = SRCPROPBRK (p);
  else if (scm_i_line       == key) p = SCM_MAKINUM (SRCPROPLINE (p));
  else if (scm_i_column     == key) p = SCM_MAKINUM (SRCPROPCOL (p));
  else if (scm_i_filename   == key) p = SRCPROPFNAME (p);
  else if (scm_i_copy       == key) p = SRCPROPCOPY (p);
  else
    {
      p = SRCPROPPLIST (p);
    plist:
      p = scm_assoc (key, p);
      return (SCM_NIMP (p) ? SCM_CDR (p) : SCM_BOOL_F);
    }
  return SCM_UNBNDP (p) ? SCM_BOOL_F : p;
}

SCM_PROC (s_set_source_property_x, "set-source-property!", 3, 0, 0, scm_set_source_property_x);
#ifdef __STDC__
SCM
scm_set_source_property_x (SCM obj, SCM key, SCM datum)
#else
SCM
scm_set_source_property_x (obj, key, datum)
     SCM obj;
     SCM key;
     SCM datum;
#endif
{
  scm_whash_handle h;
  SCM p;
  if (SCM_MEMOIZEDP (obj))
    obj = SCM_MEMOEXP (obj);
  h = scm_whash_get_handle (scm_source_whash, obj);
  if (SCM_WHASHFOUNDP (h))
    p = SCM_WHASHREF (scm_source_whash, h);
  else
    {
      h = scm_whash_create_handle (scm_source_whash, obj);
      p = SCM_EOL;
    }
  if (scm_i_breakpoint == key)
    if (SCM_FALSEP (datum))
      CLEARSRCPROPBRK (SCM_NIMP (p) && SRCPROPSP (p)
		       ? p
		       : SCM_WHASHSET (scm_source_whash, h,
				   scm_make_srcprops (0, 0, SCM_UNDEFINED,
						       SCM_UNDEFINED, p)));
    else
      SETSRCPROPBRK (SCM_NIMP (p) && SRCPROPSP (p)
		     ? p
		     : SCM_WHASHSET (scm_source_whash, h,
				 scm_make_srcprops (0, 0, SCM_UNDEFINED,
						     SCM_UNDEFINED, p)));
  else if (scm_i_line == key)
    {
      if (SCM_NIMP (p) && SRCPROPSP (p))
	SETSRCPROPLINE (p, datum);
      else
	SCM_WHASHSET (scm_source_whash, h,
		  scm_make_srcprops (datum, 0, SCM_UNDEFINED, SCM_UNDEFINED, p));
    }
  else if (scm_i_column == key)
    {
      if (SCM_NIMP (p) && SRCPROPSP (p))
	SETSRCPROPCOL (p, datum);
      else
	SCM_WHASHSET (scm_source_whash, h,
		  scm_make_srcprops (0, datum, SCM_UNDEFINED, SCM_UNDEFINED, p));
    }
  else if (scm_i_filename == key)
    {
      if (SCM_NIMP (p) && SRCPROPSP (p))
	SRCPROPFNAME (p) = datum;
      else
	SCM_WHASHSET (scm_source_whash, h, scm_make_srcprops (0, 0, datum, SCM_UNDEFINED, p));
    }
  else if (scm_i_filename == key)
    {
      if (SCM_NIMP (p) && SRCPROPSP (p))
	SRCPROPCOPY (p) = datum;
      else
	SCM_WHASHSET (scm_source_whash, h, scm_make_srcprops (0, 0, SCM_UNDEFINED, datum, p));
    }
  else
    SCM_WHASHSET (scm_source_whash, h, scm_acons (key, datum, p));
  return SCM_UNSPECIFIED;
}

#ifdef __STDC__
void
scm_init_srcprop (void)
#else
void
scm_init_srcprop ()
#endif
{
  scm_tc16_srcprops = scm_newsmob (&srcpropssmob);
  scm_source_whash = scm_make_weak_key_hash_table (SCM_MAKINUM (2047));

  scm_i_filename = SCM_CAR (scm_sysintern ("filename", SCM_UNDEFINED));
  scm_i_copy = SCM_CAR (scm_sysintern ("copy", SCM_UNDEFINED));
  scm_i_line = SCM_CAR (scm_sysintern ("line", SCM_UNDEFINED));
  scm_i_column = SCM_CAR (scm_sysintern ("column", SCM_UNDEFINED));
  scm_i_breakpoint = SCM_CAR (scm_sysintern ("breakpoint", SCM_UNDEFINED));

  scm_sysintern ("source-whash", scm_source_whash);
#include "srcprop.x"
}

void
scm_finish_srcprop ()
{
  register scm_srcprops_chunk *ptr = srcprops_chunklist, *next;
  while (ptr)
    {
      next = ptr->next;
      free ((char *) ptr);
      scm_mallocated -= sizeof (scm_srcprops_chunk)
	                + sizeof (scm_srcprops) * (SRCPROPS_CHUNKSIZE - 1);
      ptr = next;
    }
}
Commit	Line	Data
575888bd MD	1	/* Copyright (C) 1995,1996 Mikael Djurfeldt
	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, 675 Mass Ave, Cambridge, MA 02139, USA.
	16	*
	17	* As a special exception, the Free Software Foundation gives permission
	18	* for additional uses of the text contained in its release of GUILE.
	19	*
	20	* The exception is that, if you link the GUILE library with other files
	21	* to produce an executable, this does not by itself cause the
	22	* resulting executable to be covered by the GNU General Public License.
	23	* Your use of that executable is in no way restricted on account of
	24	* linking the GUILE library code into it.
	25	*
	26	* This exception does not however invalidate any other reasons why
	27	* the executable file might be covered by the GNU General Public License.
	28	*
	29	* This exception applies only to the code released by the
	30	* Free Software Foundation under the name GUILE. If you copy
	31	* code from other Free Software Foundation releases into a copy of
	32	* GUILE, as the General Public License permits, the exception does
	33	* not apply to the code that you add in this way. To avoid misleading
	34	* anyone as to the status of such modified files, you must delete
	35	* this exception notice from them.
	36	*
	37	* If you write modifications of your own for GUILE, it is your choice
	38	* whether to permit this exception to apply to your modifications.
	39	* If you do not wish that, delete this exception notice.
	40	*
	41	* The author can be reached at djurfeldt@nada.kth.se
	42	* Mikael Djurfeldt, SANS/NADA KTH, 10044 STOCKHOLM, SWEDEN
	43	*/
	44	\f
	45
	46	#include <stdio.h>
	47	#include "_scm.h"
20e6290e JB	48	#include "smob.h"
	49	#include "alist.h"
	50	#include "debug.h"
	51	#include "hashtab.h"
5c5549cb	52	#include "hash.h"
20e6290e	53	#include "weaks.h"
575888bd	54
20e6290e	55	#include "srcprop.h"
575888bd MD	56	\f
	57	/* {Source Properties}
	58	*
	59	* Properties of source list expressions.
	60	* Five of these have special meaning and optimized storage:
	61	*
	62	* filename string The name of the source file.
	63	* copy list A copy of the list expression.
	64	* line integer The source code line number.
	65	* column integer The source code column number.
	66	* breakpoint boolean Sets a breakpoint on this form.
	67	*
	68	* Most properties above can be set by the reader.
	69	*
	70	*/
	71
	72	SCM scm_i_copy;
	73	static SCM scm_i_breakpoint, scm_i_line, scm_i_column;
	74	static SCM scm_i_filename;
	75
5c5549cb	76	long scm_tc16_srcprops;
575888bd MD	77	static scm_srcprops_chunk *srcprops_chunklist = 0;
	78	static scm_srcprops *srcprops_freelist = 0;
	79
	80	#ifdef __STDC__
	81	static SCM
	82	marksrcprops (SCM obj)
	83	#else
	84	static SCM
	85	marksrcprops (obj)
	86	SCM obj;
	87	#endif
	88	{
	89	SCM_SETGC8MARK (obj);
	90	scm_gc_mark (SRCPROPFNAME (obj));
	91	scm_gc_mark (SRCPROPCOPY (obj));
	92	return SRCPROPPLIST (obj);
	93	}
	94
	95	#ifdef __STDC__
	96	static scm_sizet
	97	freesrcprops (SCM obj)
	98	#else
	99	static scm_sizet
	100	freesrcprops (obj)
	101	SCM obj;
	102	#endif
	103	{
	104	((scm_srcprops *) SCM_CDR (obj)) = srcprops_freelist;
	105	srcprops_freelist = (scm_srcprops *) SCM_CDR (obj);
	106	return 0; /* srcprops_chunks are not freed until leaving guile */
	107	}
	108
	109	#ifdef __STDC__
	110	static int
19402679	111	prinsrcprops (SCM obj, SCM port, scm_print_state *pstate)
575888bd MD	112	#else
575888bd MD	113	static int
19402679	114	prinsrcprops (obj, port, pstate)
575888bd MD	115	SCM obj;
575888bd MD	116	SCM port;
19402679	117	scm_print_state *pstate;
575888bd MD	118	#endif
575888bd MD	119	{
19402679	120	int writingp = SCM_WRITINGP (pstate);
575888bd	121	scm_gen_puts (scm_regular_string, "#<srcprops ", port);
19402679 MD	122	SCM_SET_WRITINGP (pstate, 1);
	123	scm_iprin1 (scm_srcprops_to_plist (obj), port, pstate);
	124	SCM_SET_WRITINGP (pstate, writingp);
575888bd MD	125	scm_gen_putc ('>', port);
	126	return 1;
	127	}
	128
	129	static scm_smobfuns srcpropssmob =
	130	{marksrcprops, freesrcprops, prinsrcprops, 0};
	131
	132	#ifdef __STDC__
	133	SCM
5c5549cb	134	scm_make_srcprops (int line, int col, SCM filename, SCM copy, SCM plist)
575888bd MD	135	#else
575888bd MD	136	SCM
5c5549cb	137	scm_make_srcprops (line, col, filename, copy, plist)
575888bd MD	138	int line;
	139	int col;
	140	SCM filename;
	141	SCM copy;
	142	SCM plist;
	143	#endif
	144	{
	145	register SCM ans;
	146	register scm_srcprops *ptr;
	147	SCM_DEFER_INTS;
	148	if ((ptr = srcprops_freelist) != NULL)
	149	srcprops_freelist = (scm_srcprops *)ptr;
	150	else
	151	{
	152	int i;
	153	scm_srcprops_chunk *mem;
	154	scm_sizet n = sizeof (scm_srcprops_chunk)
	155	+ sizeof (scm_srcprops) * (SRCPROPS_CHUNKSIZE - 1);
	156	SCM_SYSCALL (mem = (scm_srcprops_chunk *) malloc (n));
	157	SCM_ASSERT (mem, SCM_UNDEFINED, SCM_NALLOC, "srcprops");
	158	scm_mallocated += n;
	159	mem->next = srcprops_chunklist;
	160	srcprops_chunklist = mem;
	161	ptr = &mem->srcprops[0];
	162	for (i = 1; i < SRCPROPS_CHUNKSIZE - 1; ++i)
	163	(scm_srcprops *)&ptr[i] = &ptr[i + 1];
	164	(scm_srcprops *)&ptr[SRCPROPS_CHUNKSIZE - 1] = 0;
	165	srcprops_freelist = (scm_srcprops *) &ptr[1];
	166	}
	167	SCM_NEWCELL (ans);
5c5549cb	168	SCM_CAR (ans) = scm_tc16_srcprops;
575888bd MD	169	ptr->pos = SRCPROPMAKPOS (line, col);
	170	ptr->fname = filename;
	171	ptr->copy = copy;
	172	ptr->plist = plist;
	173	SCM_CDR (ans) = (SCM) ptr;
	174	SCM_ALLOW_INTS;
	175	return ans;
	176	}
	177
	178	#ifdef __STDC__
	179	SCM
	180	scm_srcprops_to_plist (SCM obj)
	181	#else
	182	SCM
	183	scm_srcprops_to_plist (obj)
	184	SCM obj;
	185	#endif
	186	{
	187	SCM plist = SRCPROPPLIST (obj);
	188	if (!SCM_UNBNDP (SRCPROPCOPY (obj)))
	189	plist = scm_acons (scm_i_copy, SRCPROPCOPY (obj), plist);
	190	if (!SCM_UNBNDP (SRCPROPFNAME (obj)))
	191	plist = scm_acons (scm_i_filename, SRCPROPFNAME (obj), plist);
	192	plist = scm_acons (scm_i_column, SCM_MAKINUM (SRCPROPCOL (obj)), plist);
	193	plist = scm_acons (scm_i_line, SCM_MAKINUM (SRCPROPLINE (obj)), plist);
	194	plist = scm_acons (scm_i_breakpoint, SRCPROPBRK (obj), plist);
	195	return plist;
	196	}
	197
	198	SCM_PROC (s_source_properties, "source-properties", 1, 0, 0, scm_source_properties);
	199	#ifdef __STDC__
	200	SCM
	201	scm_source_properties (SCM obj)
	202	#else
	203	SCM
	204	scm_source_properties (obj)
	205	SCM obj;
	206	#endif
	207	{
	208	SCM p;
	209	if (SCM_MEMOIZEDP (obj))
	210	obj = SCM_MEMOEXP (obj);
	211	p = scm_hashq_ref (scm_source_whash, obj, (SCM) NULL);
	212	if (p != (SCM) NULL && SRCPROPSP (p))
	213	return scm_srcprops_to_plist (p);
	214	return SCM_EOL;
	215	}
	216
	217	/* Perhaps this procedure should look through an alist
	218	and try to make a srcprops-object...? */
	219	SCM_PROC (s_set_source_properties_x, "set-source-properties!", 2, 0, 0, scm_set_source_properties_x);
	220	#ifdef __STDC__
	221	SCM
	222	scm_set_source_properties_x (SCM obj, SCM plist)
	223	#else
	224	SCM
	225	scm_set_source_properties_x (obj, plist)
	226	SCM obj;
	227	SCM plist;
	228	#endif
	229	{
	230	SCM handle;
	231	if (SCM_MEMOIZEDP (obj))
	232	obj = SCM_MEMOEXP (obj);
233	handle = scm_hashq_create_handle_x (scm_source_whash, obj, plist);
234	SCM_SETCDR (handle, plist);
235	return plist;
236	}
237
238	SCM_PROC (s_source_property, "source-property", 2, 0, 0, scm_source_property);
239	#ifdef __STDC__
240	SCM
241	scm_source_property (SCM obj, SCM key)
242	#else
243	SCM
244	scm_source_property (obj, key)
245	SCM obj;
246	SCM key;
247	#endif
248	{
249	SCM p;
250	if (SCM_MEMOIZEDP (obj))
251	obj = SCM_MEMOEXP (obj);
252	p = scm_hashq_ref (scm_source_whash, obj, SCM_EOL);
253	if (SCM_IMP (p) \|\| !SRCPROPSP (p))
254	goto plist;
255	if (scm_i_breakpoint == key) p = SRCPROPBRK (p);
256	else if (scm_i_line == key) p = SCM_MAKINUM (SRCPROPLINE (p));
257	else if (scm_i_column == key) p = SCM_MAKINUM (SRCPROPCOL (p));
258	else if (scm_i_filename == key) p = SRCPROPFNAME (p);
259	else if (scm_i_copy == key) p = SRCPROPCOPY (p);
260	else
261	{
262	p = SRCPROPPLIST (p);
263	plist:
264	p = scm_assoc (key, p);
265	return (SCM_NIMP (p) ? SCM_CDR (p) : SCM_BOOL_F);
266	}
267	return SCM_UNBNDP (p) ? SCM_BOOL_F : p;
268	}
269
270	SCM_PROC (s_set_source_property_x, "set-source-property!", 3, 0, 0, scm_set_source_property_x);
271	#ifdef __STDC__
272	SCM
273	scm_set_source_property_x (SCM obj, SCM key, SCM datum)
274	#else
275	SCM
276	scm_set_source_property_x (obj, key, datum)
277	SCM obj;
278	SCM key;
279	SCM datum;
280	#endif
281	{
282	scm_whash_handle h;
283	SCM p;
284	if (SCM_MEMOIZEDP (obj))
285	obj = SCM_MEMOEXP (obj);
286	h = scm_whash_get_handle (scm_source_whash, obj);
287	if (SCM_WHASHFOUNDP (h))
288	p = SCM_WHASHREF (scm_source_whash, h);
289	else
290	{
291	h = scm_whash_create_handle (scm_source_whash, obj);
292	p = SCM_EOL;
293	}
294	if (scm_i_breakpoint == key)
295	if (SCM_FALSEP (datum))
296	CLEARSRCPROPBRK (SCM_NIMP (p) && SRCPROPSP (p)
297	? p
298	: SCM_WHASHSET (scm_source_whash, h,
5c5549cb	299	scm_make_srcprops (0, 0, SCM_UNDEFINED,
575888bd MD	300	SCM_UNDEFINED, p)));
	301	else
	302	SETSRCPROPBRK (SCM_NIMP (p) && SRCPROPSP (p)
	303	? p
	304	: SCM_WHASHSET (scm_source_whash, h,
5c5549cb	305	scm_make_srcprops (0, 0, SCM_UNDEFINED,
575888bd MD	306	SCM_UNDEFINED, p)));
	307	else if (scm_i_line == key)
	308	{
	309	if (SCM_NIMP (p) && SRCPROPSP (p))
	310	SETSRCPROPLINE (p, datum);
	311	else
	312	SCM_WHASHSET (scm_source_whash, h,
5c5549cb	313	scm_make_srcprops (datum, 0, SCM_UNDEFINED, SCM_UNDEFINED, p));
575888bd MD	314	}
	315	else if (scm_i_column == key)
	316	{
	317	if (SCM_NIMP (p) && SRCPROPSP (p))
	318	SETSRCPROPCOL (p, datum);
	319	else
	320	SCM_WHASHSET (scm_source_whash, h,
5c5549cb	321	scm_make_srcprops (0, datum, SCM_UNDEFINED, SCM_UNDEFINED, p));
575888bd MD	322	}
	323	else if (scm_i_filename == key)
	324	{
	325	if (SCM_NIMP (p) && SRCPROPSP (p))
	326	SRCPROPFNAME (p) = datum;
	327	else
5c5549cb	328	SCM_WHASHSET (scm_source_whash, h, scm_make_srcprops (0, 0, datum, SCM_UNDEFINED, p));
575888bd MD	329	}
	330	else if (scm_i_filename == key)
	331	{
	332	if (SCM_NIMP (p) && SRCPROPSP (p))
	333	SRCPROPCOPY (p) = datum;
	334	else
5c5549cb	335	SCM_WHASHSET (scm_source_whash, h, scm_make_srcprops (0, 0, SCM_UNDEFINED, datum, p));
575888bd MD	336	}
	337	else
	338	SCM_WHASHSET (scm_source_whash, h, scm_acons (key, datum, p));
	339	return SCM_UNSPECIFIED;
	340	}
	341
	342	#ifdef __STDC__
	343	void
	344	scm_init_srcprop (void)
	345	#else
	346	void
	347	scm_init_srcprop ()
	348	#endif
	349	{
5c5549cb MD	350	scm_tc16_srcprops = scm_newsmob (&srcpropssmob);
5c5549cb MD	351	scm_source_whash = scm_make_weak_key_hash_table (SCM_MAKINUM (2047));
575888bd MD	352
	353	scm_i_filename = SCM_CAR (scm_sysintern ("filename", SCM_UNDEFINED));
	354	scm_i_copy = SCM_CAR (scm_sysintern ("copy", SCM_UNDEFINED));
	355	scm_i_line = SCM_CAR (scm_sysintern ("line", SCM_UNDEFINED));
	356	scm_i_column = SCM_CAR (scm_sysintern ("column", SCM_UNDEFINED));
	357	scm_i_breakpoint = SCM_CAR (scm_sysintern ("breakpoint", SCM_UNDEFINED));
	358
	359	scm_sysintern ("source-whash", scm_source_whash);
	360	#include "srcprop.x"
	361	}
	362
	363	void
	364	scm_finish_srcprop ()
	365	{
	366	register scm_srcprops_chunk ptr = srcprops_chunklist, next;
	367	while (ptr)
	368	{
	369	next = ptr->next;
	370	free ((char *) ptr);
	371	scm_mallocated -= sizeof (scm_srcprops_chunk)
	372	+ sizeof (scm_srcprops) * (SRCPROPS_CHUNKSIZE - 1);
5c5549cb	373	ptr = next;
575888bd MD	374	}
575888bd MD	375	}