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diff --git a/libguile/srcprop.h b/libguile/srcprop.h
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+/* classes: h_files */
+
+#ifndef SRCPROPH
+#define SRCPROPH
+/* 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
+ */
+
+
+#include "libguile/__scm.h"
+
+
+
+/* {The old whash table interface}
+ * *fixme* This is a temporary solution until weak hash table access
+ * has been optimized for speed (which is quite necessary, if they are
+ * used for recording of source code positions...)
+ */
+
+#define scm_whash_handle SCM
+
+#define scm_whash_get_handle(whash, key) scm_hash_fn_get_handle (whash, key, scm_ihashq, scm_sloppy_assq, 0)
+#define SCM_WHASHFOUNDP(h) ((h) != SCM_BOOL_F)
+#define SCM_WHASHREF(whash, handle) SCM_CDR (handle)
+#define SCM_WHASHSET(whash, handle, obj) SCM_SETCDR (handle, obj)
+#define scm_whash_create_handle(whash, key) scm_hash_fn_create_handle_x (whash, key, SCM_UNSPECIFIED, scm_ihashq, scm_sloppy_assq, 0)
+#define scm_whash_lookup(whash, obj) scm_hash_fn_ref (whash, obj, SCM_BOOL_F, scm_ihashq, scm_sloppy_assq, 0)
+#define scm_whash_insert(whash, key, obj) \
+{ \
+ register SCM w = (whash); \
+ SCM_WHASHSET (w, scm_whash_create_handle (w, key), obj); \
+} \
+
+
+/* {Source properties}
+ */
+
+extern long scm_tc16_srcprops;
+
+typedef struct scm_srcprops
+{
+ unsigned long pos;
+ SCM fname;
+ SCM copy;
+ SCM plist;
+} scm_srcprops;
+
+#define SRCPROPS_CHUNKSIZE 2047 /* Number of srcprops per chunk */
+typedef struct scm_srcprops_chunk
+{
+ struct scm_srcprops_chunk *next;
+ scm_srcprops srcprops[1];
+} scm_srcprops_chunk;
+
+#define SRCPROPSP(p) (SCM_TYP16 (p) == scm_tc16_srcprops)
+#define SRCPROPBRK(p) ((1L << 16) & SCM_CAR (p) ? SCM_BOOL_T : SCM_BOOL_F)
+#define SRCPROPPOS(p) ((scm_srcprops *) SCM_CDR (p))->pos
+#define SRCPROPLINE(p) (SRCPROPPOS(p) >> 12)
+#define SRCPROPCOL(p) (SRCPROPPOS(p) & 0x0fffL)
+#define SRCPROPFNAME(p) ((scm_srcprops *) SCM_CDR (p))->fname
+#define SRCPROPCOPY(p) ((scm_srcprops *) SCM_CDR (p))->copy
+#define SRCPROPPLIST(p) ((scm_srcprops *) SCM_CDR (p))->plist
+#define SETSRCPROPBRK(p) (SCM_SETOR_CAR (p, (1L << 16)))
+#define CLEARSRCPROPBRK(p) SCM_SETAND_CAR (p, ~(1L << 16))
+#define SRCPROPMAKPOS(l,c) (((l) << 12) + (c))
+#define SETSRCPROPPOS(p,l,c) (SRCPROPPOS (p) = SRCPROPMAKPOS (l, c))
+#define SETSRCPROPLINE(p,l) SETSRCPROPPOS (p, l, SRCPROPCOL (p))
+#define SETSRCPROPCOL(p,c) SETSRCPROPPOS (p, SRCPROPLINE (p), c)
+
+#define SRCBRKP(x) (SCM_NIMP (t.arg1 = scm_whash_lookup (scm_source_whash, (x)))\
+ && SRCPROPSP (t.arg1)\
+ && (1L << 16) & SCM_CAR (t.arg1))
+
+#define PROCTRACEP(x) SCM_NFALSEP (scm_procedure_property (x, scm_i_trace))
+
+extern SCM scm_i_filename;
+extern SCM scm_i_copy;
+extern SCM scm_i_line;
+extern SCM scm_i_column;
+extern SCM scm_i_breakpoint;
+
+
+
+
+extern SCM scm_srcprops_to_plist SCM_P ((SCM obj));
+extern SCM scm_make_srcprops SCM_P ((int line, int col, SCM fname, SCM copy, SCM plist));
+extern SCM scm_source_property SCM_P ((SCM obj, SCM key));
+extern SCM scm_set_source_property_x SCM_P ((SCM obj, SCM key, SCM datum));
+extern SCM scm_source_properties SCM_P ((SCM obj));
+extern SCM scm_set_source_properties_x SCM_P ((SCM obj, SCM props));
+extern void scm_finish_srcprop SCM_P ((void));
+extern void scm_init_srcprop SCM_P ((void));
+
+#endif /* SRCPROPH */