--- /dev/null
+/* Copyright (C) 2001, 2006, 2009 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 <stdio.h>
+#include <string.h>
+#include <stdarg.h>
+
+#include "libguile/_scm.h"
+
+#include "libguile/deprecation.h"
+#include "libguile/strings.h"
+#include "libguile/ports.h"
+
+/* Windows defines. */
+#ifdef __MINGW32__
+# define vsnprintf _vsnprintf
+#elif !HAVE_DECL_VSNPRINTF
+extern int vsnprintf (char *, size_t, const char *, va_list);
+#endif
+
+\f
+
+struct issued_warning {
+ struct issued_warning *prev;
+ const char *message;
+};
+
+static struct issued_warning *issued_warnings;
+static int print_summary = 0;
+
+void
+scm_c_issue_deprecation_warning (const char *msg)
+{
+ if (!SCM_WARN_DEPRECATED)
+ print_summary = 1;
+ else
+ {
+ struct issued_warning *iw;
+ for (iw = issued_warnings; iw; iw = iw->prev)
+ if (!strcmp (iw->message, msg))
+ return;
+ if (scm_gc_running_p)
+ fprintf (stderr, "%s\n", msg);
+ else
+ {
+ scm_puts (msg, scm_current_error_port ());
+ scm_newline (scm_current_error_port ());
+ }
+ msg = strdup (msg);
+ iw = malloc (sizeof (struct issued_warning));
+ if (msg == NULL || iw == NULL)
+ return;
+ iw->message = msg;
+ iw->prev = issued_warnings;
+ issued_warnings = iw;
+ }
+}
+
+void
+scm_c_issue_deprecation_warning_fmt (const char *msg, ...)
+{
+ va_list ap;
+ char buf[512];
+
+ va_start (ap, msg);
+ vsnprintf (buf, 511, msg, ap);
+ va_end (ap);
+ buf[511] = '\0';
+ scm_c_issue_deprecation_warning (buf);
+}
+
+SCM_DEFINE(scm_issue_deprecation_warning,
+ "issue-deprecation-warning", 0, 0, 1,
+ (SCM msgs),
+ "Output @var{msgs} to @code{(current-error-port)} when this "
+ "is the first call to @code{issue-deprecation-warning} with "
+ "this specific @var{msgs}. Do nothing otherwise. "
+ "The argument @var{msgs} should be a list of strings; "
+ "they are printed in turn, each one followed by a newline.")
+#define FUNC_NAME s_scm_issue_deprecation_warning
+{
+ if (!SCM_WARN_DEPRECATED)
+ print_summary = 1;
+ else
+ {
+ SCM nl = scm_from_locale_string ("\n");
+ SCM msgs_nl = SCM_EOL;
+ char *c_msgs;
+ while (scm_is_pair (msgs))
+ {
+ if (msgs_nl != SCM_EOL)
+ msgs_nl = scm_cons (nl, msgs_nl);
+ msgs_nl = scm_cons (SCM_CAR (msgs), msgs_nl);
+ msgs = SCM_CDR (msgs);
+ }
+ msgs_nl = scm_string_append (scm_reverse_x (msgs_nl, SCM_EOL));
+ c_msgs = scm_to_locale_string (msgs_nl);
+ scm_c_issue_deprecation_warning (c_msgs);
+ free (c_msgs);
+ }
+ return SCM_UNSPECIFIED;
+}
+#undef FUNC_NAME
+
+static void
+print_deprecation_summary (void)
+{
+ if (print_summary)
+ {
+ fputs ("\n"
+ "Some deprecated features have been used. Set the environment\n"
+ "variable GUILE_WARN_DEPRECATED to \"detailed\" and rerun the\n"
+ "program to get more information. Set it to \"no\" to suppress\n"
+ "this message.\n", stderr);
+ }
+}
+
+SCM_DEFINE(scm_include_deprecated_features,
+ "include-deprecated-features", 0, 0, 0,
+ (),
+ "Return @code{#t} iff deprecated features should be included "
+ "in public interfaces.")
+#define FUNC_NAME s_scm_include_deprecated_features
+{
+ return scm_from_bool (SCM_ENABLE_DEPRECATED == 1);
+}
+#undef FUNC_NAME
+
+
+\f
+
+void
+scm_init_deprecation ()
+{
+ const char *level = getenv ("GUILE_WARN_DEPRECATED");
+ if (level == NULL)
+ level = SCM_WARN_DEPRECATED_DEFAULT;
+ if (!strcmp (level, "detailed"))
+ SCM_WARN_DEPRECATED = 1;
+ else if (!strcmp (level, "no"))
+ SCM_WARN_DEPRECATED = 0;
+ else
+ {
+ SCM_WARN_DEPRECATED = 0;
+ atexit (print_deprecation_summary);
+ }
+#include "libguile/deprecation.x"
+}
+
+/*
+ Local Variables:
+ c-file-style: "gnu"
+ End: */