Import guile-1.8 as multiple upstream tarball component

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

diff --git a/guile18/libguile/values.c b/guile18/libguile/values.c
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+/* Copyright (C) 2000, 2001, 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
+ */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include "libguile/_scm.h"
+#include "libguile/eval.h"
+#include "libguile/feature.h"
+#include "libguile/gc.h"
+#include "libguile/numbers.h"
+#include "libguile/ports.h"
+#include "libguile/root.h"
+#include "libguile/strings.h"
+#include "libguile/struct.h"
+#include "libguile/validate.h"
+
+#include "libguile/values.h"
+
+SCM scm_values_vtable;
+
+static SCM
+print_values (SCM obj, SCM pwps)
+{
+  SCM values = scm_struct_ref (obj, SCM_INUM0);
+  SCM port = SCM_PORT_WITH_PS_PORT (pwps);
+  scm_print_state *ps = SCM_PRINT_STATE (SCM_PORT_WITH_PS_PS (pwps));
+
+  scm_puts ("#<values ", port);
+  scm_iprin1 (values, port, ps);
+  scm_puts (">", port);
+
+  return SCM_UNSPECIFIED;
+}
+
+SCM_DEFINE (scm_values, "values", 0, 0, 1,
+           (SCM args),
+           "Delivers all of its arguments to its continuation.  Except for\n"
+           "continuations created by the @code{call-with-values} procedure,\n"
+           "all continuations take exactly one value.  The effect of\n"
+           "passing no value or more than one value to continuations that\n"
+           "were not created by @code{call-with-values} is unspecified.")
+#define FUNC_NAME s_scm_values
+{
+  long n;
+  SCM result;
+
+  SCM_VALIDATE_LIST_COPYLEN (1, args, n);
+  if (n == 1)
+    result = SCM_CAR (args);
+  else
+    {
+      result = scm_make_struct (scm_values_vtable, SCM_INUM0,
+                               scm_list_1 (args));
+    }
+
+  return result;
+}
+#undef FUNC_NAME
+
+void
+scm_init_values (void)
+{
+  SCM print = scm_c_define_subr ("%print-values", scm_tc7_subr_2,
+                                print_values);
+
+  scm_values_vtable 
+    = scm_permanent_object (
+        scm_make_vtable_vtable (scm_from_locale_string ("pr"),
+                               SCM_INUM0, SCM_EOL));
+
+  SCM_SET_STRUCT_PRINTER (scm_values_vtable, print);
+
+  scm_add_feature ("values");
+
+#include "libguile/values.x"
+}
+
+/*
+  Local Variables:
+  c-file-style: "gnu"
+  End:
+*/