--- /dev/null
+/* Copyright (C) 1998,1999,2000,2001,2002,2003, 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/eval.h"
+#include "libguile/fluids.h"
+#include "libguile/modules.h"
+
+#include "libguile/validate.h"
+#include "libguile/evalext.h"
+
+SCM_DEFINE (scm_defined_p, "defined?", 1, 1, 0,
+ (SCM sym, SCM env),
+ "Return @code{#t} if @var{sym} is defined in the lexical "
+ "environment @var{env}. When @var{env} is not specified, "
+ "look in the top-level environment as defined by the "
+ "current module.")
+#define FUNC_NAME s_scm_defined_p
+{
+ SCM var;
+
+ SCM_VALIDATE_SYMBOL (1, sym);
+
+ if (SCM_UNBNDP (env))
+ var = scm_sym2var (sym, scm_current_module_lookup_closure (),
+ SCM_BOOL_F);
+ else
+ {
+ SCM frames = env;
+ register SCM b;
+ for (; SCM_NIMP (frames); frames = SCM_CDR (frames))
+ {
+ SCM_ASSERT (scm_is_pair (frames), env, SCM_ARG2, FUNC_NAME);
+ b = SCM_CAR (frames);
+ if (scm_is_true (scm_procedure_p (b)))
+ break;
+ SCM_ASSERT (scm_is_pair (b), env, SCM_ARG2, FUNC_NAME);
+ for (b = SCM_CAR (b); SCM_NIMP (b); b = SCM_CDR (b))
+ {
+ if (!scm_is_pair (b))
+ {
+ if (scm_is_eq (b, sym))
+ return SCM_BOOL_T;
+ else
+ break;
+ }
+ if (scm_is_eq (SCM_CAR (b), sym))
+ return SCM_BOOL_T;
+ }
+ }
+ var = scm_sym2var (sym,
+ SCM_NIMP (frames) ? SCM_CAR (frames) : SCM_BOOL_F,
+ SCM_BOOL_F);
+ }
+
+ return (scm_is_false (var) || SCM_UNBNDP (SCM_VARIABLE_REF (var))
+ ? SCM_BOOL_F
+ : SCM_BOOL_T);
+}
+#undef FUNC_NAME
+
+
+SCM_REGISTER_PROC (s_map_in_order, "map-in-order", 2, 0, 1, scm_map);
+
+
+SCM_DEFINE (scm_self_evaluating_p, "self-evaluating?", 1, 0, 0,
+ (SCM obj),
+ "Return #t for objects which Guile considers self-evaluating")
+#define FUNC_NAME s_scm_self_evaluating_p
+{
+ switch (SCM_ITAG3 (obj))
+ {
+ case scm_tc3_int_1:
+ case scm_tc3_int_2:
+ /* inum */
+ return SCM_BOOL_T;
+ case scm_tc3_imm24:
+ /* characters, booleans, other immediates */
+ return scm_from_bool (!scm_is_null (obj));
+ case scm_tc3_cons:
+ switch (SCM_TYP7 (obj))
+ {
+ case scm_tcs_closures:
+ case scm_tc7_vector:
+ case scm_tc7_wvect:
+ case scm_tc7_number:
+ case scm_tc7_string:
+ case scm_tc7_smob:
+ case scm_tc7_cclo:
+ case scm_tc7_pws:
+ case scm_tcs_subrs:
+ case scm_tcs_struct:
+ return SCM_BOOL_T;
+ default:
+ return SCM_BOOL_F;
+ }
+ }
+ SCM_MISC_ERROR ("Internal error: Object ~S has unknown type",
+ scm_list_1 (obj));
+ return SCM_UNSPECIFIED; /* never reached */
+}
+#undef FUNC_NAME
+
+void
+scm_init_evalext ()
+{
+#include "libguile/evalext.x"
+}
+
+/*
+ Local Variables:
+ c-file-style: "gnu"
+ End:
+*/