Import guile-1.8 as multiple upstream tarball component

[lilypond.git] / guile18 / libguile / objprop.c

diff --git a/guile18/libguile/objprop.c b/guile18/libguile/objprop.c
new file mode 100644 (file)
index 0000000..8e9486f
--- /dev/null
+++ b/guile18/libguile/objprop.c
@@ -0,0 +1,105 @@
+/*     Copyright (C) 1995,1996, 2000, 2001, 2003, 2006, 2008 Free Software Foundation, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+
+\f
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include "libguile/_scm.h"
+#include "libguile/async.h"
+#include "libguile/hashtab.h"
+#include "libguile/alist.h"
+#include "libguile/root.h"
+#include "libguile/weaks.h"
+
+#include "libguile/objprop.h"
+\f
+
+/* {Object Properties}
+ */
+
+SCM_DEFINE (scm_object_properties, "object-properties", 1, 0, 0, 
+           (SCM obj),
+           "Return @var{obj}'s property list.")
+#define FUNC_NAME s_scm_object_properties
+{
+  return scm_hashq_ref (scm_object_whash, obj, SCM_EOL);
+}
+#undef FUNC_NAME
+
+
+SCM_DEFINE (scm_set_object_properties_x, "set-object-properties!", 2, 0, 0,
+           (SCM obj, SCM alist),
+           "Set @var{obj}'s property list to @var{alist}.")
+#define FUNC_NAME s_scm_set_object_properties_x
+{
+  SCM handle = scm_hashq_create_handle_x (scm_object_whash, obj, alist);
+  SCM_SETCDR (handle, alist);
+  return alist;
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_object_property, "object-property", 2, 0, 0,
+           (SCM obj, SCM key),
+           "Return the property of @var{obj} with name @var{key}.")
+#define FUNC_NAME s_scm_object_property
+{
+  SCM assoc;
+  assoc = scm_assq (key, scm_object_properties (obj));
+  return (SCM_NIMP (assoc) ? SCM_CDR (assoc) : SCM_BOOL_F);
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_set_object_property_x, "set-object-property!", 3, 0, 0,
+           (SCM obj, SCM key, SCM value),
+           "In @var{obj}'s property list, set the property named @var{key}\n"
+           "to @var{value}.")
+#define FUNC_NAME s_scm_set_object_property_x
+{
+  SCM h;
+  SCM assoc;
+  h = scm_hashq_create_handle_x (scm_object_whash, obj, SCM_EOL);
+  SCM_CRITICAL_SECTION_START;
+  assoc = scm_assq (key, SCM_CDR (h));
+  if (SCM_NIMP (assoc))
+    SCM_SETCDR (assoc, value);
+  else
+    {
+      assoc = scm_acons (key, value, SCM_CDR (h));
+      SCM_SETCDR (h, assoc);
+    }
+  SCM_CRITICAL_SECTION_END;
+  return value;
+}
+#undef FUNC_NAME
+
+
+void
+scm_init_objprop ()
+{
+  scm_object_whash = scm_make_weak_key_hash_table (SCM_UNDEFINED);
+#include "libguile/objprop.x"
+}
+
+
+/*
+  Local Variables:
+  c-file-style: "gnu"
+  End:
+*/