lib/xstrtol-error.c

   1 /* A more useful interface to strtol.
   2
   3    Copyright (C) 1995-1996, 1998-1999, 2001-2004, 2006-2025 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-error.h"
  21
  22 #include <stdlib.h>
  23
  24 #include <error.h>
  25 #include "exitfail.h"
  26 #include "gettext.h"
  27
  28 #define _(msgid) dgettext ("gnulib", msgid)
  29 #define N_(msgid) msgid
  30
  31 /* Report an error for an invalid integer in an option argument.
  32
  33    ERR is the error code returned by one of the xstrto* functions.
  34
  35    Use OPT_IDX to decide whether to print the short option string "C"
  36    or "-C" or a long option string derived from LONG_OPTION.  OPT_IDX
  37    is -2 if the short option "C" was used, without any leading "-"; it
  38    is -1 if the short option "-C" was used; otherwise it is an index
  39    into LONG_OPTIONS, which should have a name preceded by two '-'
  40    characters.
  41
  42    ARG is the option-argument containing the integer.
  43
  44    After reporting an error, exit with status EXIT_STATUS if it is
  45    nonzero.  */
  46
  47 static void
  48 xstrtol_error (enum strtol_error err,
  49                int opt_idx, char c, struct option const *long_options,
  50                char const *arg,
  51                int exit_status)
  52 {
  53   char const *hyphens = "--";
  54   char const *msgid;
  55   char const *option;
  56   char option_buffer[2];
  57
  58   switch (err)
  59     {
  60     default:
  61       abort ();
  62
  63     case LONGINT_INVALID:
  64       msgid = N_("invalid %s%s argument '%s'");
  65       break;
  66
  67     case LONGINT_INVALID_SUFFIX_CHAR:
  68     case LONGINT_INVALID_SUFFIX_CHAR_WITH_OVERFLOW:
  69       msgid = N_("invalid suffix in %s%s argument '%s'");
  70       break;
  71
  72     case LONGINT_OVERFLOW:
  73       msgid = N_("%s%s argument '%s' too large");
  74       break;
  75     }
  76
  77   if (opt_idx < 0)
  78     {
  79       hyphens -= opt_idx;
  80       option_buffer[0] = c;
  81       option_buffer[1] = '\0';
  82       option = option_buffer;
  83     }
  84   else
  85     option = long_options[opt_idx].name;
  86
  87   error (exit_status, 0, dgettext ("gnulib", msgid), hyphens, option, arg);
  88 }
  89
  90 /* Like xstrtol_error, except exit with a failure status.  */
  91
  92 void
  93 xstrtol_fatal (enum strtol_error err,
  94                int opt_idx, char c, struct option const *long_options,
  95                char const *arg)
  96 {
  97   xstrtol_error (err, opt_idx, c, long_options, arg, exit_failure);
  98   abort ();
  99 }