lib/xstrtol-error.c

   1 /* A more useful interface to strtol.
   2
   3    Copyright (C) 1995-1996, 1998-1999, 2001-2004, 2006-2018 Free Software
   4    Foundation, Inc.
   5
   6    This program is free software: you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  18
  19 #include <config.h>
  20 #include "xstrtol.h"
  21
  22 #include <stdlib.h>
  23
  24 #include "error.h"
  25 #include "exitfail.h"
  26 #include "gettext.h"
  27
  28 #define N_(msgid) msgid
  29
  30 /* Report an error for an invalid integer in an option argument.
  31
  32    ERR is the error code returned by one of the xstrto* functions.
  33
  34    Use OPT_IDX to decide whether to print the short option string "C"
  35    or "-C" or a long option string derived from LONG_OPTION.  OPT_IDX
  36    is -2 if the short option "C" was used, without any leading "-"; it
  37    is -1 if the short option "-C" was used; otherwise it is an index
  38    into LONG_OPTIONS, which should have a name preceded by two '-'
  39    characters.
  40
  41    ARG is the option-argument containing the integer.
  42
  43    After reporting an error, exit with status EXIT_STATUS if it is
  44    nonzero.  */
  45
  46 static void
  47 xstrtol_error (enum strtol_error err,
  48                int opt_idx, char c, struct option const *long_options,
  49                char const *arg,
  50                int exit_status)
  51 {
  52   char const *hyphens = "--";
  53   char const *msgid;
  54   char const *option;
  55   char option_buffer[2];
  56
  57   switch (err)
  58     {
  59     default:
  60       abort ();
  61
  62     case LONGINT_INVALID:
  63       msgid = N_("invalid %s%s argument '%s'");
  64       break;
  65
  66     case LONGINT_INVALID_SUFFIX_CHAR:
  67     case LONGINT_INVALID_SUFFIX_CHAR_WITH_OVERFLOW:
  68       msgid = N_("invalid suffix in %s%s argument '%s'");
  69       break;
  70
  71     case LONGINT_OVERFLOW:
  72       msgid = N_("%s%s argument '%s' too large");
  73       break;
  74     }
  75
  76   if (opt_idx < 0)
  77     {
  78       hyphens -= opt_idx;
  79       option_buffer[0] = c;
  80       option_buffer[1] = '\0';
  81       option = option_buffer;
  82     }
  83   else
  84     option = long_options[opt_idx].name;
  85
  86   error (exit_status, 0, gettext (msgid), hyphens, option, arg);
  87 }
  88
  89 /* Like xstrtol_error, except exit with a failure status.  */
  90
  91 void
  92 xstrtol_fatal (enum strtol_error err,
  93                int opt_idx, char c, struct option const *long_options,
  94                char const *arg)
  95 {
  96   xstrtol_error (err, opt_idx, c, long_options, arg, exit_failure);
  97   abort ();
  98 }