/* set-fields.h -- parse field list argument

   Copyright (C) 2015-2016 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 3 of the License, 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, see <http://www.gnu.org/licenses/>.  */
#ifndef SET_FIELDS_H
# define SET_FIELDS_H

struct field_range_pair
  {
    size_t lo;
    size_t hi;
  };

/* Array of `struct range_pair' holding all the finite ranges. */
extern struct field_range_pair *frp;

/* Number of finite ranges specified by the user. */
extern size_t n_frp;

/* field list parsing options */
enum
{
  SETFLD_ALLOW_DASH = 0x01,     /* allow single dash meaning 'all fields' */
  SETFLD_COMPLEMENT = 0x02,     /* complement the field list */
  SETFLD_ERRMSG_USE_POS = 0x04  /* when reporting errors, say 'position' instead
                                   of 'field' (used with cut -b/-c) */
};

/* allocates and initializes the FRP array and N_FRP count */
extern void set_fields (const char *fieldstr, unsigned int options);

/* frees memory allocated by set_fields() */
extern void reset_fields (void);

#endif