summaryrefslogtreecommitdiff
path: root/libguile/error.c
diff options
context:
space:
mode:
Diffstat (limited to 'libguile/error.c')
-rw-r--r--libguile/error.c205
1 files changed, 205 insertions, 0 deletions
diff --git a/libguile/error.c b/libguile/error.c
new file mode 100644
index 000000000..c16612513
--- /dev/null
+++ b/libguile/error.c
@@ -0,0 +1,205 @@
+/* Copyright (C) 1995,1996 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, 675 Mass Ave, Cambridge, MA 02139, 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 <stdio.h>
+#include "_scm.h"
+
+
+
+
+/* {Errors and Exceptional Conditions}
+ */
+
+SCM system_error_sym;
+
+/* True between SCM_DEFER_INTS and SCM_ALLOW_INTS, and
+ * when the interpreter is not running at all.
+ */
+int scm_ints_disabled = 1;
+
+
+extern int errno;
+#ifdef __STDC__
+static void
+err_head (char *str)
+#else
+static void
+err_head (str)
+ char *str;
+#endif
+{
+ int oerrno = errno;
+ if (SCM_NIMP (scm_cur_outp))
+ scm_fflush (scm_cur_outp);
+ scm_gen_putc ('\n', scm_cur_errp);
+#if 0
+ if (SCM_BOOL_F != *scm_loc_loadpath)
+ {
+ scm_iprin1 (*scm_loc_loadpath, scm_cur_errp, 1);
+ scm_gen_puts (scm_regular_string, ", line ", scm_cur_errp);
+ scm_intprint ((long) scm_linum, 10, scm_cur_errp);
+ scm_gen_puts (scm_regular_string, ": ", scm_cur_errp);
+ }
+#endif
+ scm_fflush (scm_cur_errp);
+ errno = oerrno;
+ if (scm_cur_errp == scm_def_errp)
+ {
+ if (errno > 0)
+ perror (str);
+ fflush (stderr);
+ return;
+ }
+}
+
+
+SCM_PROC(s_errno, "errno", 0, 1, 0, scm_errno);
+#ifdef __STDC__
+SCM
+scm_errno (SCM arg)
+#else
+SCM
+scm_errno (arg)
+ SCM arg;
+#endif
+{
+ int old = errno;
+ if (!SCM_UNBNDP (arg))
+ {
+ if (SCM_FALSEP (arg))
+ errno = 0;
+ else
+ errno = SCM_INUM (arg);
+ }
+ return SCM_MAKINUM (old);
+}
+
+SCM_PROC(s_perror, "perror", 1, 0, 0, scm_perror);
+#ifdef __STDC__
+SCM
+scm_perror (SCM arg)
+#else
+SCM
+scm_perror (arg)
+ SCM arg;
+#endif
+{
+ SCM_ASSERT (SCM_NIMP (arg) && SCM_STRINGP (arg), arg, SCM_ARG1, s_perror);
+ err_head (SCM_CHARS (arg));
+ return SCM_UNSPECIFIED;
+}
+
+
+#ifdef __STDC__
+void
+scm_everr (SCM exp, SCM env, SCM arg, char *pos, char *s_subr)
+#else
+void
+scm_everr (exp, env, arg, pos, s_subr)
+ SCM exp;
+ SCM env;
+ SCM arg;
+ char *pos;
+ char *s_subr;
+#endif
+{
+ SCM desc;
+ SCM args;
+
+ if ((~0x1fL) & (long) pos)
+ desc = scm_makfrom0str (pos);
+ else
+ desc = SCM_MAKINUM ((long)pos);
+
+ {
+ SCM sym;
+ if (!s_subr || !*s_subr)
+ sym = SCM_BOOL_F;
+ else
+ sym = SCM_CAR (scm_intern0 (s_subr));
+ args = scm_listify (desc, sym, arg, SCM_UNDEFINED);
+ }
+
+ /* (throw (quote %%system-error) <desc> <proc-name> arg)
+ *
+ * <desc> is a string or an integer (see %%system-errors).
+ * <proc-name> is a symbol or #f in some annoying cases (e.g. cddr).
+ */
+
+ scm_ithrow (system_error_sym, args, 1);
+
+ /* No return, but just in case: */
+
+ write (2, "unhandled system error", sizeof ("unhandled system error"));
+ exit (1);
+}
+
+#ifdef __STDC__
+SCM
+scm_wta (SCM arg, char *pos, char *s_subr)
+#else
+SCM
+scm_wta (arg, pos, s_subr)
+ SCM arg;
+ char *pos;
+ char *s_subr;
+#endif
+{
+ scm_everr (SCM_UNDEFINED, SCM_EOL, arg, pos, s_subr);
+ return SCM_UNSPECIFIED;
+}
+
+
+
+#ifdef __STDC__
+void
+scm_init_error (void)
+#else
+void
+scm_init_error ()
+#endif
+{
+ system_error_sym = SCM_CAR (scm_intern0 ("%%system-error"));
+ scm_permanent_object (system_error_sym);
+#include "error.x"
+}
+