libgfortran/runtime/stop.c

   1 /* Implementation of the STOP statement.
   2    Copyright (C) 2002-2013 Free Software Foundation, Inc.
   3    Contributed by Paul Brook <paul@nowt.org>
   4
   5 This file is part of the GNU Fortran runtime library (libgfortran).
   6
   7 Libgfortran is free software; you can redistribute it and/or
   8 modify it under the terms of the GNU General Public
   9 License as published by the Free Software Foundation; either
  10 version 3 of the License, or (at your option) any later version.
  11
  12 Libgfortran is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 Under Section 7 of GPL version 3, you are granted additional
  18 permissions described in the GCC Runtime Library Exception, version
  19 3.1, as published by the Free Software Foundation.
  20
  21 You should have received a copy of the GNU General Public License and
  22 a copy of the GCC Runtime Library Exception along with this program;
  23 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  24 <http://www.gnu.org/licenses/>.  */
  25
  26 #include "libgfortran.h"
  27 #include <stdlib.h>
  28 #include <string.h>
  29 #include <unistd.h>
  30
  31 /* A numeric STOP statement.  */
  32
  33 extern void stop_numeric (GFC_INTEGER_4)
  34   __attribute__ ((noreturn));
  35 export_proto(stop_numeric);
  36
  37 void
  38 stop_numeric (GFC_INTEGER_4 code)
  39 {
  40   if (code == -1)
  41     code = 0;
  42   else
  43     st_printf ("STOP %d\n", (int)code);
  44
  45   exit (code);
  46 }
  47
  48
  49 /* A Fortran 2008 numeric STOP statement.  */
  50
  51 extern void stop_numeric_f08 (GFC_INTEGER_4)
  52   __attribute__ ((noreturn));
  53 export_proto(stop_numeric_f08);
  54
  55 void
  56 stop_numeric_f08 (GFC_INTEGER_4 code)
  57 {
  58   st_printf ("STOP %d\n", (int)code);
  59   exit (code);
  60 }
  61
  62
  63 /* A character string or blank STOP statement.  */
  64
  65 void
  66 stop_string (const char *string, GFC_INTEGER_4 len)
  67 {
  68   if (string)
  69     {
  70       estr_write ("STOP ");
  71       (void) write (STDERR_FILENO, string, len);
  72       estr_write ("\n");
  73     }
  74   exit (0);
  75 }
  76
  77
  78 /* Per Fortran 2008, section 8.4:  "Execution of a STOP statement initiates
  79    normal termination of execution. Execution of an ERROR STOP statement
  80    initiates error termination of execution."  Thus, error_stop_string returns
  81    a nonzero exit status code.  */
  82
  83 extern void error_stop_string (const char *, GFC_INTEGER_4)
  84   __attribute__ ((noreturn));
  85 export_proto(error_stop_string);
  86
  87 void
  88 error_stop_string (const char *string, GFC_INTEGER_4 len)
  89 {
  90   estr_write ("ERROR STOP ");
  91   (void) write (STDERR_FILENO, string, len);
  92   estr_write ("\n");
  93
  94   exit (1);
  95 }
  96
  97
  98 /* A numeric ERROR STOP statement.  */
  99
 100 extern void error_stop_numeric (GFC_INTEGER_4)
 101   __attribute__ ((noreturn));
 102 export_proto(error_stop_numeric);
 103
 104 void
 105 error_stop_numeric (GFC_INTEGER_4 code)
 106 {
 107   st_printf ("ERROR STOP %d\n", (int) code);
 108   exit (code);
 109 }