diff options
author | Marius Vollmer <mvo@zagadka.de> | 2000-09-03 20:25:19 +0000 |
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committer | Marius Vollmer <mvo@zagadka.de> | 2000-09-03 20:25:19 +0000 |
commit | 718eb1762b33a428b97e1f1c472c50270aa512e8 (patch) | |
tree | 1b6eed139b74a65c2bf29d39a2806d092989da44 | |
parent | 8a443f663acbb05d02d1cf9b3504d81b07e6a738 (diff) | |
download | guile-718eb1762b33a428b97e1f1c472c50270aa512e8.tar.gz |
New files.
-rw-r--r-- | libguile/properties.c | 156 | ||||
-rw-r--r-- | libguile/properties.h | 62 |
2 files changed, 218 insertions, 0 deletions
diff --git a/libguile/properties.c b/libguile/properties.c new file mode 100644 index 000000000..cc5941d9f --- /dev/null +++ b/libguile/properties.c @@ -0,0 +1,156 @@ +/* Copyright (C) 1995,1996, 2000 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 */ + + + +#include <stdio.h> +#include "libguile/_scm.h" +#include "libguile/hashtab.h" +#include "libguile/alist.h" +#include "libguile/root.h" +#include "libguile/weaks.h" +#include "libguile/validate.h" +#include "libguile/eval.h" + +#include "libguile/properties.h" + + +/* {Properties} + */ + +SCM_DEFINE (scm_primitive_make_property, "primitive-make-property", 1, 0, 0, + (SCM not_found_proc), + "Create a @dfn{property token} that can be used with\n" + "@code{primitive-property-ref} and @code{primitive-property-set!}.\n" + "See @code{primitive-property-ref} for the significance of\n" + "@var{not_found_proc}.") +#define FUNC_NAME s_scm_primitive_make_property +{ + if (not_found_proc != SCM_BOOL_F) + SCM_VALIDATE_PROC (SCM_ARG1, not_found_proc); + return scm_cons (not_found_proc, SCM_EOL); +} +#undef FUNC_NAME + +SCM_DEFINE (scm_primitive_property_ref, "primitive-property-ref", 2, 0, 0, + (SCM prop, SCM obj), + "Return the property @var{prop} of @var{obj}. When no value\n" + "has yet been associated with @var{prop} and @var{obj}, call\n" + "@var{not-found-proc} instead (see @code{primitive-make-property})\n" + "and use its return value. That value is also associated with\n" + "@var{obj} via @code{primitive-property-set!}. When\n" + "@var{not-found-proc} is @code{#f}, use @code{#f} as the\n" + "default value of @var{prop}.") +#define FUNC_NAME s_scm_primitive_property_ref +{ + SCM h, assoc; + + SCM_VALIDATE_CONS (SCM_ARG1, prop); + + h = scm_hashq_get_handle (scm_properties_whash, obj); + assoc = (SCM_NIMP (h) ? scm_assq (prop, SCM_CDR (h)) : SCM_BOOL_F); + if (SCM_NIMP (assoc)) + return SCM_CDR (assoc); + + if (SCM_FALSEP (SCM_CAR (prop))) + return SCM_BOOL_F; + else + { + SCM val = scm_apply (SCM_CAR (prop), + SCM_LIST2 (prop, obj), SCM_EOL); + if (SCM_IMP (h)) + h = scm_hashq_create_handle_x (scm_properties_whash, obj, SCM_EOL); + SCM_SETCDR (h, scm_acons (prop, val, SCM_CDR (h))); + return val; + } +} +#undef FUNC_NAME + +SCM_DEFINE (scm_primitive_property_set_x, "primitive-property-set!", 3, 0, 0, + (SCM prop, SCM obj, SCM val), + "Associate @var{code} with @var{prop} and @var{obj}.") +#define FUNC_NAME s_scm_primitive_property_set_x +{ + SCM h, assoc; + SCM_VALIDATE_CONS (SCM_ARG1, prop); + h = scm_hashq_create_handle_x (scm_properties_whash, obj, SCM_EOL); + assoc = scm_assq (prop, SCM_CDR (h)); + if (SCM_NIMP (assoc)) + SCM_SETCDR (assoc, val); + else + { + assoc = scm_acons (prop, val, SCM_CDR (h)); + SCM_SETCDR (h, assoc); + } + return SCM_UNSPECIFIED; +} +#undef FUNC_NAME + +SCM_DEFINE (scm_primitive_property_del_x, "primitive-property-del!", 2, 0, 0, + (SCM prop, SCM obj), + "Remove any value associated with @var{prop} and @var{obj}.") +#define FUNC_NAME s_scm_primitive_property_del_x +{ + SCM h; + SCM_VALIDATE_CONS (SCM_ARG1, prop); + h = scm_hashq_get_handle (scm_properties_whash, obj); + if (SCM_NIMP (h)) + SCM_SETCDR (h, scm_assq_remove_x (SCM_CDR (h), prop)); + return SCM_UNSPECIFIED; +} +#undef FUNC_NAME + +void +scm_init_properties () +{ + scm_properties_whash = scm_make_weak_key_hash_table (SCM_MAKINUM (511)); +#include "libguile/properties.x" +} + + +/* + Local Variables: + c-file-style: "gnu" + End: +*/ diff --git a/libguile/properties.h b/libguile/properties.h new file mode 100644 index 000000000..e256046a7 --- /dev/null +++ b/libguile/properties.h @@ -0,0 +1,62 @@ +/* classes: h_files */ + +#ifndef PROPERTIES_H +#define PROPERTIES_H +/* Copyright (C) 1995,1996,1998, 2000 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. */ + + +#include "libguile/__scm.h" + +SCM scm_primitive_make_property (SCM not_found_proc); +SCM scm_primitive_property_ref (SCM prop, SCM obj); +SCM scm_primitive_property_set_x (SCM prop, SCM obj, SCM val); +SCM scm_primitive_property_del_x (SCM prop, SCM obj); + +void scm_init_properties (void); + +#endif /* PROPEERTIES_H */ + +/* + Local Variables: + c-file-style: "gnu" + End: +*/ |