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Diffstat (limited to 'libguile/objprop.c')
-rw-r--r-- | libguile/objprop.c | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/libguile/objprop.c b/libguile/objprop.c new file mode 100644 index 000000000..e97b591ce --- /dev/null +++ b/libguile/objprop.c @@ -0,0 +1,137 @@ +/* Copyright (C) 1995,1996 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, 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. + */ + + +#include <stdio.h> +#include "_scm.h" + + + +/* {Object Properties} + */ + +SCM_PROC(s_object_properties, "object-properties", 1, 0, 0, scm_object_properties); +#ifdef __STDC__ +SCM +scm_object_properties (SCM obj) +#else +SCM +scm_object_properties (obj) + SCM obj; +#endif +{ + return scm_hashq_create_handle_x (scm_object_whash, obj, SCM_EOL); +} + + +SCM_PROC(s_set_object_properties_x, "set-object-properties!", 2, 0, 0, scm_set_object_properties_x); +#ifdef __STDC__ +SCM +scm_set_object_properties_x (SCM obj, SCM plist) +#else +SCM +scm_set_object_properties_x (obj, plist) + SCM obj; + SCM plist; +#endif +{ + SCM handle; + scm_hashq_create_handle_x (scm_object_whash, obj, plist); + SCM_SETCDR (handle, plist); + return plist; +} + +SCM_PROC(s_object_property, "object-property", 2, 0, 0, scm_object_property); +#ifdef __STDC__ +SCM +scm_object_property (SCM obj, SCM key) +#else +SCM +scm_object_property (obj, key) + SCM obj; + SCM key; +#endif +{ + SCM assoc; + assoc = scm_assq (key, SCM_CDR (scm_object_properties (obj))); + return (SCM_NIMP (assoc) ? SCM_CDR (assoc) : SCM_BOOL_F); +} + +SCM_PROC(s_set_object_property_x, "set-object-property!", 3, 0, 0, scm_set_object_property_x); +#ifdef __STDC__ +SCM +scm_set_object_property_x (SCM obj, SCM key, SCM val) +#else +SCM +scm_set_object_property_x (obj, key, val) + SCM obj; + SCM key; + SCM val; +#endif +{ + SCM h; + SCM assoc; + h = scm_hashq_create_handle_x (scm_object_whash, obj, SCM_EOL); + SCM_DEFER_INTS; + assoc = scm_assoc (key, SCM_CDR (h)); + if (SCM_NIMP (assoc)) + SCM_SETCDR (assoc, val); + else + { + assoc = scm_acons (key, val, SCM_CDR (h)); + SCM_SETCDR (h, assoc); + } + SCM_ALLOW_INTS; + return val; +} + +#ifdef __STDC__ +void +scm_init_objprop (void) +#else +void +scm_init_objprop () +#endif +{ + scm_object_whash = scm_make_weak_hash_table (SCM_MAKINUM (511)); +#include "objprop.x" +} + |