/* human.h -- print human readable file size

   Copyright (C) 1996-2007, 2009-2018 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 <https://www.gnu.org/licenses/>.  */

/* Written by Paul Eggert and Larry McVoy.  */

#ifndef HUMAN_H_

# define HUMAN_H_ 1

# include <limits.h>

# include <stdbool.h>

# include <stdint.h>

# include <unistd.h>

# include <xstrtol.h>

/* A conservative bound on the maximum length of a human-readable string.

   The output can be the square of the largest uintmax_t, so double

   its size before converting to a bound.

   log10 (2.0) < 146/485.  Add 1 for integer division truncation.

   Also, the output can have a thousands separator between every digit,

   so multiply by MB_LEN_MAX + 1 and then subtract MB_LEN_MAX.

   Append 1 for a space before the suffix.

   Finally, append 3, the maximum length of a suffix.  */

# define LONGEST_HUMAN_READABLE \

  ((2 * sizeof (uintmax_t) * CHAR_BIT * 146 / 485 + 1) * (MB_LEN_MAX + 1) \

   - MB_LEN_MAX + 1 + 3)

/* Options for human_readable.  */

enum

{

  /* Unless otherwise specified these options may be ORed together.  */

  /* The following three options are mutually exclusive.  */

  /* Round to plus infinity (default).  */

  human_ceiling = 0,

  /* Round to nearest, ties to even.  */

  human_round_to_nearest = 1,

  /* Round to minus infinity.  */

  human_floor = 2,

  /* Group digits together, e.g. "1,000,000".  This uses the

     locale-defined grouping; the traditional C locale does not group,

     so this has effect only if some other locale is in use.  */

  human_group_digits = 4,

  /* When autoscaling, suppress ".0" at end.  */

  human_suppress_point_zero = 8,

  /* Scale output and use SI-style units, ignoring the output block size.  */

  human_autoscale = 16,

  /* Prefer base 1024 to base 1000.  */

  human_base_1024 = 32,

  /* Prepend " " before unit symbol.  */

  human_space_before_unit = 64,

  /* Append SI prefix, e.g. "k" or "M".  */

  human_SI = 128,

  /* Append "B" (if base 1000) or "iB" (if base 1024) to SI prefix.  */

  human_B = 256

};

char *human_readable (uintmax_t, char *, int, uintmax_t, uintmax_t);

enum strtol_error human_options (char const *, int *, uintmax_t *);

#endif /* HUMAN_H_ */