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Diffstat (limited to 'libguile/error.c')
-rw-r--r-- | libguile/error.c | 205 |
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" +} + |