#if HAVE_CONFIG_H
# include <config.h>
#endif
#include <sys/types.h>
#include <stdio.h>
#if HAVE_LIMITS_H
# include <limits.h>
#endif
#if HAVE_STRING_H
# include <string.h>
#else
# include <strings.h>
#endif
#ifndef CHAR_BIT
# define CHAR_BIT 8
#endif
#if HAVE_STDLIB_H
# include <stdlib.h>
#endif
#ifndef HAVE_DECL_GETENV
"this configure-time declaration test was not run"
#endif
#if !HAVE_DECL_GETENV
char *getenv ();
#endif
#if ENABLE_NLS
# include <libintl.h>
# define _(Text) gettext (Text)
#else
# define _(Text) Text
#endif
#include <argmatch.h>
#include <error.h>
#include <xstrtol.h>
#include "human.h"
static const char suffixes[] =
{
0,
'k',
'M',
'G',
'T',
'P',
'E',
'Z',
'Y'
};
static double
adjust_value (enum human_inexact_style inexact_style, double value)
{
if (inexact_style != human_round_to_even && value < (uintmax_t) -1)
{
uintmax_t u = value;
value = u + (inexact_style == human_ceiling && u != value);
}
return value;
}
char *
human_readable (uintmax_t n, char *buf,
int from_block_size, int output_block_size)
{
return human_readable_inexact (n, buf, from_block_size, output_block_size,
human_round_to_even);
}
char *
human_readable_inexact (uintmax_t n, char *buf,
int from_block_size, int output_block_size,
enum human_inexact_style inexact_style)
{
uintmax_t amt;
int base;
int to_block_size;
int tenths = 0;
int power;
char *p;
int rounding = 0;
if (output_block_size < 0)
{
base = -output_block_size;
to_block_size = 1;
}
else
{
base = 0;
to_block_size = output_block_size;
}
p = buf + LONGEST_HUMAN_READABLE;
*p = '\0';
#ifdef lint
power = 0;
#endif
{
int multiplier;
int divisor;
int r2;
int r10;
if (to_block_size <= from_block_size
? (from_block_size % to_block_size != 0
|| (multiplier = from_block_size / to_block_size,
(amt = n * multiplier) / multiplier != n))
: (from_block_size == 0
|| to_block_size % from_block_size != 0
|| (divisor = to_block_size / from_block_size,
r10 = (n % divisor) * 10,
r2 = (r10 % divisor) * 2,
amt = n / divisor,
tenths = r10 / divisor,
rounding = r2 < divisor ? 0 < r2 : 2 + (divisor < r2),
0)))
{
double damt = n * (from_block_size / (double) to_block_size);
if (! base)
sprintf (buf, "%.0f", adjust_value (inexact_style, damt));
else
{
double e = 1;
power = 0;
do
{
e *= base;
power++;
}
while (e * base <= damt && power < sizeof suffixes - 1);
damt /= e;
sprintf (buf, "%.1f%c", adjust_value (inexact_style, damt),
suffixes[power]);
if (4 < strlen (buf))
sprintf (buf, "%.0f%c",
adjust_value (inexact_style, damt * 10) / 10,
suffixes[power]);
}
return buf;
}
}
if (base && base <= amt)
{
power = 0;
do
{
int r10 = (amt % base) * 10 + tenths;
int r2 = (r10 % base) * 2 + (rounding >> 1);
amt /= base;
tenths = r10 / base;
rounding = (r2 < base
? 0 < r2 + rounding
: 2 + (base < r2 + rounding));
power++;
}
while (base <= amt && power < sizeof suffixes - 1);
*--p = suffixes[power];
if (amt < 10)
{
if (2 * (1 - (int) inexact_style)
< rounding + (tenths & (inexact_style == human_round_to_even)))
{
tenths++;
rounding = 0;
if (tenths == 10)
{
amt++;
tenths = 0;
}
}
if (amt < 10)
{
*--p = '0' + tenths;
*--p = '.';
tenths = rounding = 0;
}
}
}
if (inexact_style == human_ceiling
? 0 < tenths + rounding
: inexact_style == human_round_to_even
? 5 < tenths + (2 < rounding + (amt & 1))
: 0)
{
amt++;
if (amt == base && power < sizeof suffixes - 1)
{
*p = suffixes[power + 1];
*--p = '0';
*--p = '.';
amt = 1;
}
}
do
*--p = '0' + (int) (amt % 10);
while ((amt /= 10) != 0);
return p;
}
#ifndef DEFAULT_BLOCK_SIZE
# define DEFAULT_BLOCK_SIZE 1024
#endif
static char const *const block_size_args[] = { "human-readable", "si", 0 };
static int const block_size_types[] = { -1024, -1000 };
static int
default_block_size (void)
{
return getenv ("POSIXLY_CORRECT") ? 512 : DEFAULT_BLOCK_SIZE;
}
static strtol_error
humblock (char const *spec, int *block_size)
{
int i;
if (! spec && ! (spec = getenv ("BLOCK_SIZE")))
*block_size = default_block_size ();
else if (0 <= (i = ARGMATCH (spec, block_size_args, block_size_types)))
*block_size = block_size_types[i];
else
{
char *ptr;
unsigned long val;
strtol_error e = xstrtoul (spec, &ptr, 0, &val, "eEgGkKmMpPtTyYzZ0");
if (e != LONGINT_OK)
return e;
if (*ptr)
return LONGINT_INVALID_SUFFIX_CHAR;
if ((int) val < 0 || val != (int) val)
return LONGINT_OVERFLOW;
*block_size = (int) val;
}
return LONGINT_OK;
}
void
human_block_size (char const *spec, int report_errors, int *block_size)
{
strtol_error e = humblock (spec, block_size);
if (*block_size == 0)
{
*block_size = default_block_size ();
e = LONGINT_INVALID;
}
if (e != LONGINT_OK && report_errors)
STRTOL_FATAL_ERROR (spec, _("block size"), e);
}