302 / 1000 is ceil (log10 (2.0)). 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 * 302 / 1000 + 1) * (MB_LEN_MAX + 1) \
- - MB_LEN_MAX + 3)
+ - MB_LEN_MAX + 1 + 3)
/* Options for human_readable. */
enum
/* 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 = 64,
+ human_SI = 128,
/* Append "B" (if base 1000) or "iB" (if base 1024) to SI prefix. */
- human_B = 128
+ human_B = 256
};
char *human_readable (uintmax_t, char *, int, uintmax_t, uintmax_t);