contrib/diff/lib/xstrtol.h

   1 /* A more useful interface to strtol.
   2
   3    Copyright (C) 1995, 1996, 1998, 1999, 2001, 2002, 2003, 2004 Free
   4    Software 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 2, or (at your option)
   9    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, write to the Free Software Foundation,
  18    Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  19
  20 #ifndef XSTRTOL_H_
  21 # define XSTRTOL_H_ 1
  22
  23 # include "exitfail.h"
  24
  25 /* Get uintmax_t.  */
  26 # if HAVE_INTTYPES_H
  27 #  include <inttypes.h>
  28 # else
  29 #  if HAVE_STDINT_H
  30 #   include <stdint.h>
  31 #  endif
  32 # endif
  33
  34 # ifndef _STRTOL_ERROR
  35 enum strtol_error
  36   {
  37     LONGINT_OK = 0,
  38
  39     /* These two values can be ORed together, to indicate that both
  40        errors occurred.  */
  41     LONGINT_OVERFLOW = 1,
  42     LONGINT_INVALID_SUFFIX_CHAR = 2,
  43
  44     LONGINT_INVALID_SUFFIX_CHAR_WITH_OVERFLOW = (LONGINT_INVALID_SUFFIX_CHAR
  45                                                  | LONGINT_OVERFLOW),
  46     LONGINT_INVALID = 4
  47   };
  48 typedef enum strtol_error strtol_error;
  49 # endif
  50
  51 # define _DECLARE_XSTRTOL(name, type) \
  52   strtol_error name (const char *, char **, int, type *, const char *);
  53 _DECLARE_XSTRTOL (xstrtol, long int)
  54 _DECLARE_XSTRTOL (xstrtoul, unsigned long int)
  55 _DECLARE_XSTRTOL (xstrtoimax, intmax_t)
  56 _DECLARE_XSTRTOL (xstrtoumax, uintmax_t)
  57
  58 # define _STRTOL_ERROR(Exit_code, Str, Argument_type_string, Err)       \
  59   do                                                                    \
  60     {                                                                   \
  61       switch ((Err))                                                    \
  62         {                                                               \
  63         default:                                                        \
  64           abort ();                                                     \
  65                                                                         \
  66         case LONGINT_INVALID:                                           \
  67           error ((Exit_code), 0, "invalid %s `%s'",                     \
  68                  (Argument_type_string), (Str));                        \
  69           break;                                                        \
  70                                                                         \
  71         case LONGINT_INVALID_SUFFIX_CHAR:                               \
  72         case LONGINT_INVALID_SUFFIX_CHAR | LONGINT_OVERFLOW:            \
  73           error ((Exit_code), 0, "invalid character following %s in `%s'", \
  74                  (Argument_type_string), (Str));                        \
  75           break;                                                        \
  76                                                                         \
  77         case LONGINT_OVERFLOW:                                          \
  78           error ((Exit_code), 0, "%s `%s' too large",                   \
  79                  (Argument_type_string), (Str));                        \
  80           break;                                                        \
  81         }                                                               \
  82     }                                                                   \
  83   while (0)
  84
  85 # define STRTOL_FATAL_ERROR(Str, Argument_type_string, Err)             \
  86   _STRTOL_ERROR (exit_failure, Str, Argument_type_string, Err)
  87
  88 # define STRTOL_FAIL_WARN(Str, Argument_type_string, Err)               \
  89   _STRTOL_ERROR (0, Str, Argument_type_string, Err)
  90
  91 #endif /* not XSTRTOL_H_ */