84 lines
2.7 KiB
C
84 lines
2.7 KiB
C
|
/* human.h -- print human readable file size
|
||
|
|
|
||
|
|
Copyright (C) 1996-2007, 2009-2020 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_ */
|