tar/lib/xstrtol.h

/* A more useful interface to strtol.
   Copyright 1995, 1996, 1998, 1999, 2001 Free Software Foundation, Inc.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2, or (at your option)
   any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software Foundation,
   Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */

#ifndef XSTRTOL_H_
# define XSTRTOL_H_ 1

# if HAVE_INTTYPES_H
#  include <inttypes.h> /* for uintmax_t */
# endif

# ifndef PARAMS
#  if defined PROTOTYPES || (defined __STDC__ && __STDC__)
#   define PARAMS(Args) Args
#  else
#   define PARAMS(Args) ()
#  endif
# endif

# ifndef _STRTOL_ERROR
enum strtol_error
  {
    LONGINT_OK, LONGINT_INVALID, LONGINT_INVALID_SUFFIX_CHAR, LONGINT_OVERFLOW
  };
typedef enum strtol_error strtol_error;
# endif

# define _DECLARE_XSTRTOL(name, type) \
  strtol_error \
    name PARAMS ((const char *s, char **ptr, int base, \
		  type *val, const char *valid_suffixes));
_DECLARE_XSTRTOL (xstrtol, long int)
_DECLARE_XSTRTOL (xstrtoul, unsigned long int)
_DECLARE_XSTRTOL (xstrtoumax, uintmax_t)

# define _STRTOL_ERROR(Exit_code, Str, Argument_type_string, Err)	\
  do									\
    {									\
      switch ((Err))							\
	{								\
	case LONGINT_OK:						\
	  abort ();							\
									\
	case LONGINT_INVALID:						\
	  error ((Exit_code), 0, "invalid %s `%s'",			\
		 (Argument_type_string), (Str));			\
	  break;							\
									\
	case LONGINT_INVALID_SUFFIX_CHAR:				\
	  error ((Exit_code), 0, "invalid character following %s in `%s'", \
		 (Argument_type_string), (Str));			\
	  break;							\
									\
	case LONGINT_OVERFLOW:						\
	  error ((Exit_code), 0, "%s `%s' too large",			\
		 (Argument_type_string), (Str));			\
	  break;							\
	}								\
    }									\
  while (0)

# define STRTOL_FATAL_ERROR(Str, Argument_type_string, Err)		\
  _STRTOL_ERROR (2, Str, Argument_type_string, Err)

# define STRTOL_FAIL_WARN(Str, Argument_type_string, Err)		\
  _STRTOL_ERROR (0, Str, Argument_type_string, Err)

#endif /* not XSTRTOL_H_ */