libguile/error.c

   1 /*      Copyright (C) 1995,1996,1997 Free Software Foundation, Inc.
   2  *
   3  * This program is free software; you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License as published by
   5  * the Free Software Foundation; either version 2, or (at your option)
   6  * any later version.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this software; see the file COPYING.  If not, write to
  15  * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
  16  * Boston, MA 02111-1307 USA
  17  *
  18  * As a special exception, the Free Software Foundation gives permission
  19  * for additional uses of the text contained in its release of GUILE.
  20  *
  21  * The exception is that, if you link the GUILE library with other files
  22  * to produce an executable, this does not by itself cause the
  23  * resulting executable to be covered by the GNU General Public License.
  24  * Your use of that executable is in no way restricted on account of
  25  * linking the GUILE library code into it.
  26  *
  27  * This exception does not however invalidate any other reasons why
  28  * the executable file might be covered by the GNU General Public License.
  29  *
  30  * This exception applies only to the code released by the
  31  * Free Software Foundation under the name GUILE.  If you copy
  32  * code from other Free Software Foundation releases into a copy of
  33  * GUILE, as the General Public License permits, the exception does
  34  * not apply to the code that you add in this way.  To avoid misleading
  35  * anyone as to the status of such modified files, you must delete
  36  * this exception notice from them.
  37  *
  38  * If you write modifications of your own for GUILE, it is your choice
  39  * whether to permit this exception to apply to your modifications.
  40  * If you do not wish that, delete this exception notice.  */
  41 \f
  42
  43 #include <stdio.h>
  44 #include "_scm.h"
  45 #include "pairs.h"
  46 #include "genio.h"
  47 #include "throw.h"
  48
  49 #include "error.h"
  50
  51 #ifdef HAVE_UNISTD_H
  52 #include <unistd.h>
  53 #endif
  54 \f
  55
  56 \f
  57 /* {Errors and Exceptional Conditions}
  58  */
  59
  60
  61 extern int errno;
  62
  63 /* All errors should pass through here.  */
  64 void
  65 scm_error (key, subr, message, args, rest)
  66      SCM key;
  67      char *subr;
  68      char *message;
  69      SCM args;
  70      SCM rest;
  71 {
  72   SCM arg_list;
  73   arg_list = scm_listify (subr ? scm_makfrom0str (subr) : SCM_BOOL_F,
  74                           message ? scm_makfrom0str (message) : SCM_BOOL_F,
  75                           args,
  76                           rest,
  77                           SCM_UNDEFINED);
  78   scm_ithrow (key, arg_list, 1);
  79
  80   /* No return, but just in case: */
  81
  82   write (2, "unhandled system error\n",
  83          sizeof ("unhandled system error\n") - 1);
  84   exit (1);
  85 }
  86
  87 /* Scheme interface to scm_error.  */
  88 SCM_PROC(s_error_scm, "scm-error", 5, 0, 0, scm_error_scm);
  89 SCM
  90 scm_error_scm (key, subr, message, args, rest)
  91      SCM key;
  92      SCM subr;
  93      SCM message;
  94      SCM args;
  95      SCM rest;
  96 {
  97   SCM_ASSERT (SCM_NIMP (key) && SCM_SYMBOLP (key), key, SCM_ARG1, s_error_scm);
  98   SCM_ASSERT (SCM_FALSEP (subr) || (SCM_NIMP (subr) && SCM_ROSTRINGP (subr)),
  99               subr, SCM_ARG2, s_error_scm);
 100   SCM_ASSERT (SCM_FALSEP (message)
 101               || (SCM_NIMP (message) && SCM_ROSTRINGP (message)),
 102               message, SCM_ARG3, s_error_scm);
 103
 104   SCM_COERCE_SUBSTR (message);
 105
 106   scm_error (key,
 107              (SCM_FALSEP (subr)) ? NULL : SCM_ROCHARS (subr),
 108              (SCM_FALSEP (message)) ? NULL : SCM_ROCHARS (message),
 109              args,
 110              rest);
 111   /* not reached.  */
 112 }
 113
 114 SCM_PROC (s_strerror, "strerror", 1, 0, 0, scm_strerror);
 115 SCM
 116 scm_strerror (SCM err)
 117 {
 118   SCM_ASSERT (SCM_INUMP (err), err, SCM_ARG1, s_strerror);
 119   return scm_makfrom0str (strerror (SCM_INUM (err)));
 120 }
 121
 122 SCM_SYMBOL (scm_system_error_key, "system-error");
 123 void
 124 scm_syserror (subr)
 125      char *subr;
 126 {
 127   scm_error (scm_system_error_key,
 128              subr,
 129              "%s",
 130              scm_listify (scm_makfrom0str (strerror (errno)),
 131                           SCM_UNDEFINED),
 132              scm_listify (SCM_MAKINUM (errno), SCM_UNDEFINED));
 133 }
 134
 135 void
 136 scm_syserror_msg (subr, message, args, eno)
 137      char *subr;
 138      char *message;
 139      SCM args;
 140      int eno;
 141 {
 142   scm_error (scm_system_error_key,
 143              subr,
 144              message,
 145              args,
 146              scm_listify (SCM_MAKINUM (eno), SCM_UNDEFINED));
 147 }
 148
 149 void
 150 scm_sysmissing (subr)
 151      char *subr;
 152 {
 153 #ifdef ENOSYS
 154   scm_error (scm_system_error_key,
 155              subr,
 156              "%s",
 157              scm_listify (scm_makfrom0str (strerror (ENOSYS)), SCM_UNDEFINED),
 158              scm_listify (SCM_MAKINUM (ENOSYS), SCM_UNDEFINED));
 159 #else
 160   scm_error (scm_system_error_key,
 161              subr,
 162              "Missing function",
 163              SCM_BOOL_F,
 164              scm_listify (SCM_MAKINUM (0), SCM_UNDEFINED));
 165 #endif
 166 }
 167
 168 SCM_SYMBOL (scm_num_overflow_key, "numerical-overflow");
 169 void
 170 scm_num_overflow (subr)
 171   char *subr;
 172 {
 173   scm_error (scm_num_overflow_key,
 174              subr,
 175              "Numerical overflow",
 176              SCM_BOOL_F,
 177              SCM_BOOL_F);
 178 }
 179
 180 SCM_SYMBOL (scm_out_of_range_key, "out-of-range");
 181 void
 182 scm_out_of_range (subr, bad_value)
 183      char *subr;
 184      SCM bad_value;
 185 {
 186   scm_error (scm_out_of_range_key,
 187              subr,
 188              "Argument out of range: %S",
 189              scm_listify (bad_value, SCM_UNDEFINED),
 190              SCM_BOOL_F);
 191 }
 192
 193 SCM_SYMBOL (scm_args_number_key, "wrong-number-of-args");
 194 void
 195 scm_wrong_num_args (proc)
 196      SCM proc;
 197 {
 198   scm_error (scm_args_number_key,
 199              NULL,
 200              "Wrong number of arguments to %s",
 201              scm_listify (proc, SCM_UNDEFINED),
 202              SCM_BOOL_F);
 203 }
 204
 205 SCM_SYMBOL (scm_arg_type_key, "wrong-type-arg");
 206 void
 207 scm_wrong_type_arg (subr, pos, bad_value)
 208      char *subr;
 209      int pos;
 210      SCM bad_value;
 211 {
 212   scm_error (scm_arg_type_key,
 213              subr,
 214              (pos == 0) ? "Wrong type argument: %S"
 215              : "Wrong type argument in position %s: %S",
 216              (pos == 0) ? scm_listify (bad_value, SCM_UNDEFINED)
 217              : scm_listify (SCM_MAKINUM (pos), bad_value, SCM_UNDEFINED),
 218              SCM_BOOL_F);
 219 }
 220
 221 SCM_SYMBOL (scm_memory_alloc_key, "memory-allocation-error");
 222 void
 223 scm_memory_error (subr)
 224      char *subr;
 225 {
 226   scm_error (scm_memory_alloc_key,
 227              subr,
 228              "Memory allocation error",
 229              SCM_BOOL_F,
 230              SCM_BOOL_F);
 231 }
 232
 233 SCM_SYMBOL (scm_misc_error_key, "misc-error");
 234 void
 235 scm_misc_error (subr, message, args)
 236      char *subr;
 237      char *message;
 238      SCM args;
 239 {
 240   scm_error (scm_misc_error_key, subr, message, args, SCM_BOOL_F);
 241 }
 242
 243 /* implements the SCM_ASSERT interface.  */
 244 SCM
 245 scm_wta (arg, pos, s_subr)
 246      SCM arg;
 247      char *pos;
 248      char *s_subr;
 249 {
 250   if (!s_subr || !*s_subr)
 251     s_subr = NULL;
 252   if ((~0x1fL) & (long) pos)
 253     {
 254       /* error string supplied.  */
 255       scm_misc_error (s_subr, pos, SCM_EOL);
 256     }
 257   else
 258     {
 259       /* numerical error code.  */
 260       int error = (long) pos;
 261
 262       switch (error)
 263         {
 264         case SCM_ARGn:
 265           scm_wrong_type_arg (s_subr, 0, arg);
 266         case SCM_ARG1:
 267           scm_wrong_type_arg (s_subr, 1, arg);
 268         case SCM_ARG2:
 269           scm_wrong_type_arg (s_subr, 2, arg);
 270         case SCM_ARG3:
 271           scm_wrong_type_arg (s_subr, 3, arg);
 272         case SCM_ARG4:
 273           scm_wrong_type_arg (s_subr, 4, arg);
 274         case SCM_ARG5:
 275           scm_wrong_type_arg (s_subr, 5, arg);
 276         case SCM_ARG6:
 277           scm_wrong_type_arg (s_subr, 6, arg);
 278         case SCM_ARG7:
 279           scm_wrong_type_arg (s_subr, 7, arg);
 280         case SCM_WNA:
 281           scm_wrong_num_args (arg);
 282         case SCM_OUTOFRANGE:
 283           scm_out_of_range (s_subr, arg);
 284         case SCM_NALLOC:
 285           scm_memory_error (s_subr);
 286         default:
 287           /* this shouldn't happen.  */
 288           scm_misc_error (s_subr, "Unknown error", SCM_EOL);
 289         }
 290     }
 291   return SCM_UNSPECIFIED;
 292 }
 293
 294 /*  obsolete interface: scm_everr (exp, env, arg, pos, s_subr)
 295     was equivalent to scm_wta (arg, pos, s_subr)  */
 296
 297 void
 298 scm_init_error ()
 299 {
 300 #include "cpp_err_symbols.c"
 301 #include "error.x"
 302 }
 303