/* Copyright (C) 1995,1996,1997,1998,2000,2001, 2004, 2006 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 #endif #include #include #include "libguile/_scm.h" #include "libguile/dynwind.h" #include "libguile/pairs.h" #include "libguile/strings.h" #include "libguile/throw.h" #include "libguile/validate.h" #include "libguile/error.h" #ifdef HAVE_STRING_H #include #endif #ifdef HAVE_UNISTD_H #include #endif /* For Windows... */ #ifdef HAVE_IO_H #include #endif /* {Errors and Exceptional Conditions} */ /* Scheme interface to scm_error_scm. */ void scm_error (SCM key, const char *subr, const char *message, SCM args, SCM rest) { scm_error_scm (key, (subr == NULL) ? SCM_BOOL_F : scm_from_locale_string (subr), (message == NULL) ? SCM_BOOL_F : scm_from_locale_string (message), args, rest); } /* All errors should pass through here. */ SCM_DEFINE (scm_error_scm, "scm-error", 5, 0, 0, (SCM key, SCM subr, SCM message, SCM args, SCM data), "Raise an error with key @var{key}. @var{subr} can be a string\n" "naming the procedure associated with the error, or @code{#f}.\n" "@var{message} is the error message string, possibly containing\n" "@code{~S} and @code{~A} escapes. When an error is reported,\n" "these are replaced by formatting the corresponding members of\n" "@var{args}: @code{~A} (was @code{%s} in older versions of\n" "Guile) formats using @code{display} and @code{~S} (was\n" "@code{%S}) formats using @code{write}. @var{data} is a list or\n" "@code{#f} depending on @var{key}: if @var{key} is\n" "@code{system-error} then it should be a list containing the\n" "Unix @code{errno} value; If @var{key} is @code{signal} then it\n" "should be a list containing the Unix signal number; If\n" "@var{key} is @code{out-of-range} or @code{wrong-type-arg},\n" "it is a list containing the bad value; otherwise\n" "it will usually be @code{#f}.") #define FUNC_NAME s_scm_error_scm { if (scm_gc_running_p) { /* The error occured during GC --- abort */ fprintf (stderr, "Guile: error during GC.\n"), abort (); } scm_ithrow (key, scm_list_4 (subr, message, args, data), 1); /* No return, but just in case: */ fprintf (stderr, "Guile scm_ithrow returned!\n"); exit (1); } #undef FUNC_NAME #ifdef __MINGW32__ # include "win32-socket.h" # define SCM_I_STRERROR(err) \ ((err >= WSABASEERR) ? scm_i_socket_strerror (err) : strerror (err)) # define SCM_I_ERRNO() \ (errno ? errno : scm_i_socket_errno ()) #else # define SCM_I_STRERROR(err) strerror (err) # define SCM_I_ERRNO() errno #endif /* __MINGW32__ */ /* strerror may not be thread safe, for instance in glibc (version 2.3.2) an error number not among the known values results in a string like "Unknown error 9999" formed in a static buffer, which will be overwritten by a similar call in another thread. A test program running two threads with different unknown error numbers can trip this fairly quickly. Some systems don't do what glibc does, instead just giving a single "Unknown error" for unrecognised numbers. It doesn't seem worth trying to tell if that's the case, a mutex is reasonably fast, and strerror isn't needed very often. strerror_r (when available) could be used, it might be a touch faster than a frame and a mutex, though there's probably not much difference. */ SCM_DEFINE (scm_strerror, "strerror", 1, 0, 0, (SCM err), "Return the Unix error message corresponding to @var{err}, which\n" "must be an integer value.") #define FUNC_NAME s_scm_strerror { SCM ret; scm_dynwind_begin (0); scm_i_dynwind_pthread_mutex_lock (&scm_i_misc_mutex); ret = scm_from_locale_string (SCM_I_STRERROR (scm_to_int (err))); scm_dynwind_end (); return ret; } #undef FUNC_NAME SCM_GLOBAL_SYMBOL (scm_system_error_key, "system-error"); void scm_syserror (const char *subr) { SCM err = scm_from_int (SCM_I_ERRNO ()); scm_error (scm_system_error_key, subr, "~A", scm_cons (scm_strerror (err), SCM_EOL), scm_cons (err, SCM_EOL)); } void scm_syserror_msg (const char *subr, const char *message, SCM args, int eno) { scm_error (scm_system_error_key, subr, message, args, scm_cons (scm_from_int (eno), SCM_EOL)); } SCM_GLOBAL_SYMBOL (scm_num_overflow_key, "numerical-overflow"); void scm_num_overflow (const char *subr) { scm_error (scm_num_overflow_key, subr, "Numerical overflow", SCM_BOOL_F, SCM_BOOL_F); } SCM_GLOBAL_SYMBOL (scm_out_of_range_key, "out-of-range"); void scm_out_of_range (const char *subr, SCM bad_value) { scm_error (scm_out_of_range_key, subr, "Value out of range: ~S", scm_list_1 (bad_value), scm_list_1 (bad_value)); } void scm_out_of_range_pos (const char *subr, SCM bad_value, SCM pos) { scm_error (scm_out_of_range_key, subr, "Argument ~A out of range: ~S", scm_list_2 (pos, bad_value), scm_list_1 (bad_value)); } SCM_GLOBAL_SYMBOL (scm_args_number_key, "wrong-number-of-args"); void scm_wrong_num_args (SCM proc) { scm_error (scm_args_number_key, NULL, "Wrong number of arguments to ~A", scm_list_1 (proc), SCM_BOOL_F); } void scm_error_num_args_subr (const char *subr) { scm_error (scm_args_number_key, NULL, "Wrong number of arguments to ~A", scm_list_1 (scm_from_locale_string (subr)), SCM_BOOL_F); } SCM_GLOBAL_SYMBOL (scm_arg_type_key, "wrong-type-arg"); void scm_wrong_type_arg (const char *subr, int pos, SCM bad_value) { scm_error (scm_arg_type_key, subr, (pos == 0) ? "Wrong type: ~S" : "Wrong type argument in position ~A: ~S", (pos == 0) ? scm_list_1 (bad_value) : scm_list_2 (scm_from_int (pos), bad_value), scm_list_1 (bad_value)); } void scm_wrong_type_arg_msg (const char *subr, int pos, SCM bad_value, const char *szMessage) { SCM msg = scm_from_locale_string (szMessage); if (pos == 0) { scm_error (scm_arg_type_key, subr, "Wrong type (expecting ~A): ~S", scm_list_2 (msg, bad_value), scm_list_1 (bad_value)); } else { scm_error (scm_arg_type_key, subr, "Wrong type argument in position ~A (expecting ~A): ~S", scm_list_3 (scm_from_int (pos), msg, bad_value), scm_list_1 (bad_value)); } } SCM_GLOBAL_SYMBOL (scm_memory_alloc_key, "memory-allocation-error"); void scm_memory_error (const char *subr) { fprintf (stderr, "FATAL: memory error in %s\n", subr); abort (); } SCM_GLOBAL_SYMBOL (scm_misc_error_key, "misc-error"); void scm_misc_error (const char *subr, const char *message, SCM args) { scm_error (scm_misc_error_key, subr, message, args, SCM_BOOL_F); } void scm_init_error () { #include "libguile/cpp_err_symbols.c" #include "libguile/error.x" } /* Local Variables: c-file-style: "gnu" End: */