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annotate lib/human.c @ 4543:a6b4c227ffae

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Include stdio.h, for sprintf.
author Paul Eggert <eggert@cs.ucla.edu>
date Thu, 14 Aug 2003 23:00:25 +0000
parents d0d257fdad20
children b0acbb185a60
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1 /* human.c -- print human readable file size
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2
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3 Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003 Free
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4 Software Foundation, Inc.
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5
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6 This program is free software; you can redistribute it and/or modify
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7 it under the terms of the GNU General Public License as published by
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8 the Free Software Foundation; either version 2, or (at your option)
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9 any later version.
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10
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11 This program is distributed in the hope that it will be useful,
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12 but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 GNU General Public License for more details.
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15
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16 You should have received a copy of the GNU General Public License
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17 along with this program; if not, write to the Free Software Foundation,
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18 Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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19
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20 /* Written by Paul Eggert and Larry McVoy. */
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21
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22 #if HAVE_CONFIG_H
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23 # include <config.h>
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24 #endif
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25
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26 #include "human.h"
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27
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28 #ifndef SIZE_MAX
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29 # define SIZE_MAX ((size_t) -1)
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30 #endif
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31 #ifndef UINTMAX_MAX
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32 # define UINTMAX_MAX ((uintmax_t) -1)
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33 #endif
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34
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35 #if HAVE_LOCALE_H && HAVE_LOCALECONV
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36 # include <locale.h>
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37 #endif
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38
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39 #if HAVE_STDLIB_H
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40 # include <stdlib.h>
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41 #endif
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42 #ifndef HAVE_DECL_GETENV
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43 "this configure-time declaration test was not run"
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44 #endif
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45 #if !HAVE_DECL_GETENV
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46 char *getenv ();
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47 #endif
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48
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49 #if HAVE_STRING_H
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50 # include <string.h>
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51 #endif
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52
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53 #if HAVE_STRINGS_H
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54 # include <strings.h>
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55 #endif
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56
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57 #include <stdio.h>
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58
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59 #include "gettext.h"
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60 #define _(msgid) gettext (msgid)
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61
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62 #include <argmatch.h>
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63 #include <error.h>
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64 #include <xstrtol.h>
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65
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66 /* The maximum length of a suffix like "KiB". */
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67 #define HUMAN_READABLE_SUFFIX_LENGTH_MAX 3
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68
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69 static const char power_letter[] =
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70 {
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71 0, /* not used */
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72 'K', /* kibi ('k' for kilo is a special case) */
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73 'M', /* mega or mebi */
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74 'G', /* giga or gibi */
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75 'T', /* tera or tebi */
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76 'P', /* peta or pebi */
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77 'E', /* exa or exbi */
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78 'Z', /* zetta or 2**70 */
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79 'Y' /* yotta or 2**80 */
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80 };
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81
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82
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83 /* If INEXACT_STYLE is not human_round_to_nearest, and if easily
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84 possible, adjust VALUE according to the style. */
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85
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86 static long double
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87 adjust_value (int inexact_style, long double value)
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88 {
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89 /* Do not use the floorl or ceill functions, as that would mean
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90 checking for their presence and possibly linking with the
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91 standard math library, which is a porting pain. So leave the
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92 value alone if it is too large to easily round. */
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93 if (inexact_style != human_round_to_nearest && value < UINTMAX_MAX)
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94 {
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95 uintmax_t u = value;
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96 value = u + (inexact_style == human_ceiling && u != value);
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97 }
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98
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99 return value;
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100 }
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101
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102 /* Group the digits of NUMBER according to the grouping rules of the
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103 current locale. NUMBER contains NUMBERLEN digits. Modify the
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104 bytes pointed to by NUMBER in place, subtracting 1 from NUMBER for
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105 each byte inserted. Return the starting address of the modified
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106 number.
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107
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108 To group the digits, use GROUPING and THOUSANDS_SEP as in `struct
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109 lconv' from <locale.h>. */
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110
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111 static char *
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112 group_number (char *number, size_t numberlen,
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113 char const *grouping, char const *thousands_sep)
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114 {
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115 register char *d;
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116 size_t grouplen = SIZE_MAX;
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117 size_t thousands_seplen = strlen (thousands_sep);
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118 size_t i = numberlen;
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119
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120 /* The maximum possible value for NUMBERLEN is the number of digits
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121 in the square of the largest uintmax_t, so double the size of
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122 uintmax_t before converting to a bound. 302 / 1000 is ceil
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123 (log10 (2.0)). Add 1 for integer division truncation. */
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124 char buf[2 * sizeof (uintmax_t) * CHAR_BIT * 302 / 1000 + 1];
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125
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126 memcpy (buf, number, numberlen);
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127 d = number + numberlen;
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128
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129 for (;;)
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130 {
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131 unsigned char g = *grouping;
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132
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133 if (g)
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134 {
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135 grouplen = g < CHAR_MAX ? g : i;
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136 grouping++;
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137 }
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138
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139 if (i < grouplen)
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Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
140 grouplen = i;
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Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
141
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Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
142 d -= grouplen;
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Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
143 i -= grouplen;
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Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
144 memcpy (d, buf + i, grouplen);
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Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
145 if (i == 0)
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Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
146 return d;
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Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
147
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Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
148 d -= thousands_seplen;
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Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
149 memcpy (d, thousands_sep, thousands_seplen);
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Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
150 }
1863
e6b535c4a46e (human_readable): New function.
Jim Meyering <jim@meyering.net>
parents: 1848
diff changeset
151 }
e6b535c4a46e (human_readable): New function.
Jim Meyering <jim@meyering.net>
parents: 1848
diff changeset
152
4351
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
153 /* Convert N to a human readable format in BUF, using the options OPTS.
1142
ff40370aead6 (human_readable): Convert to ANSI-style definition.
Jim Meyering <jim@meyering.net>
parents: 1137
diff changeset
154
1391
c9a7b76bd443 * lib/human.c, lib/human.h (human_readable): Coalesce last two args
Jim Meyering <jim@meyering.net>
parents: 1142
diff changeset
155 N is expressed in units of FROM_BLOCK_SIZE. FROM_BLOCK_SIZE must
1848
afab915d3e18 (human_readable): Allow from_block_size to be zero.
Jim Meyering <jim@meyering.net>
parents: 1841
diff changeset
156 be nonnegative.
1391
c9a7b76bd443 * lib/human.c, lib/human.h (human_readable): Coalesce last two args
Jim Meyering <jim@meyering.net>
parents: 1142
diff changeset
157
4351
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
158 Use units of TO_BLOCK_SIZE in the output number. TO_BLOCK_SIZE
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
159 must be positive.
1142
ff40370aead6 (human_readable): Convert to ANSI-style definition.
Jim Meyering <jim@meyering.net>
parents: 1137
diff changeset
160
4351
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
161 Use (OPTS & (human_round_to_nearest | human_floor | human_ceiling))
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
162 to determine whether to take the ceiling or floor of any result
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
163 that cannot be expressed exactly.
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
164
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Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
165 If (OPTS & human_group_digits), group the thousands digits
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
166 according to the locale, e.g., `1,000,000' in an American English
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
167 locale.
1863
e6b535c4a46e (human_readable): New function.
Jim Meyering <jim@meyering.net>
parents: 1848
diff changeset
168
4351
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
169 If (OPTS & human_autoscale), deduce the output block size
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
170 automatically; TO_BLOCK_SIZE must be 1 but it has no effect on the
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
171 output. Use powers of 1024 if (OPTS & human_base_1024), and powers
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
172 of 1000 otherwise. For example, assuming powers of 1024, 8500
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
173 would be converted to 8.3, 133456345 to 127, 56990456345 to 53, and
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
174 so on. Numbers smaller than the power aren't modified.
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
175 human_autoscale is normally used together with human_SI.
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Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
176
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Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
177 If (OPTS & human_SI), append an SI prefix indicating which power is
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
178 being used. If in addition (OPTS & human_B), append "B" (if base
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
179 1000) or "iB" (if base 1024) to the SI prefix. When ((OPTS &
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
180 human_SI) && ! (OPTS & human_autoscale)), TO_BLOCK_SIZE must be a
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
181 power of 1024 or of 1000, depending on (OPTS &
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
182 human_base_1024). */
1137
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
183
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
184 char *
4351
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
185 human_readable (uintmax_t n, char *buf, int opts,
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
186 uintmax_t from_block_size, uintmax_t to_block_size)
1137
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
187 {
4351
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
188 int inexact_style =
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
189 opts & (human_round_to_nearest | human_floor | human_ceiling);
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
190 unsigned int base = opts & human_base_1024 ? 1024 : 1000;
1137
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
191 uintmax_t amt;
4351
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
192 int tenths;
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
193 int exponent = -1;
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
194 int exponent_max = sizeof power_letter - 1;
1137
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
195 char *p;
4351
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
196 char *psuffix;
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
197 char const *integerlim;
1137
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
198
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
199 /* 0 means adjusted N == AMT.TENTHS;
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
200 1 means AMT.TENTHS < adjusted N < AMT.TENTHS + 0.05;
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
201 2 means adjusted N == AMT.TENTHS + 0.05;
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
202 3 means AMT.TENTHS + 0.05 < adjusted N < AMT.TENTHS + 0.1. */
4351
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
203 int rounding;
1137
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
204
4351
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
205 char const *decimal_point = ".";
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
206 size_t decimal_pointlen = 1;
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
207 char const *grouping = "";
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
208 char const *thousands_sep = "";
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
209 #if HAVE_LOCALE_H && HAVE_LOCALECONV
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
210 struct lconv const *l = localeconv ();
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
211 size_t pointlen = strlen (l->decimal_point);
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
212 if (0 < pointlen && pointlen <= MB_LEN_MAX)
1391
c9a7b76bd443 * lib/human.c, lib/human.h (human_readable): Coalesce last two args
Jim Meyering <jim@meyering.net>
parents: 1142
diff changeset
213 {
4351
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
214 decimal_point = l->decimal_point;
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
215 decimal_pointlen = pointlen;
1391
c9a7b76bd443 * lib/human.c, lib/human.h (human_readable): Coalesce last two args
Jim Meyering <jim@meyering.net>
parents: 1142
diff changeset
216 }
4351
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
217 grouping = l->grouping;
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
218 if (strlen (l->thousands_sep) <= MB_LEN_MAX)
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
219 thousands_sep = l->thousands_sep;
1142
ff40370aead6 (human_readable): Convert to ANSI-style definition.
Jim Meyering <jim@meyering.net>
parents: 1137
diff changeset
220 #endif
1137
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
221
4351
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
222 psuffix = buf + LONGEST_HUMAN_READABLE - HUMAN_READABLE_SUFFIX_LENGTH_MAX;
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
223 p = psuffix;
2590
a3c74265aa47 (human_readable_inexact): Allow an input block
Jim Meyering <jim@meyering.net>
parents: 2293
diff changeset
224
4351
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
225 /* Adjust AMT out of FROM_BLOCK_SIZE units and into TO_BLOCK_SIZE
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
226 units. If this can be done exactly with integer arithmetic, do
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
227 not use floating point operations. */
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
228 if (to_block_size <= from_block_size)
1137
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
229 {
4351
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
230 if (from_block_size % to_block_size == 0)
1137
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
231 {
4351
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
232 uintmax_t multiplier = from_block_size / to_block_size;
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
233 amt = n * multiplier;
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
234 if (amt / multiplier == n)
1863
e6b535c4a46e (human_readable): New function.
Jim Meyering <jim@meyering.net>
parents: 1848
diff changeset
235 {
4351
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
236 tenths = 0;
1863
e6b535c4a46e (human_readable): New function.
Jim Meyering <jim@meyering.net>
parents: 1848
diff changeset
237 rounding = 0;
4351
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
238 goto use_integer_arithmetic;
1137
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
239 }
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
240 }
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
241 }
4351
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
242 else if (from_block_size != 0 && to_block_size % from_block_size == 0)
1137
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
243 {
4351
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
244 uintmax_t divisor = to_block_size / from_block_size;
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
245 uintmax_t r10 = (n % divisor) * 10;
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
246 uintmax_t r2 = (r10 % divisor) * 2;
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
247 amt = n / divisor;
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
248 tenths = r10 / divisor;
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
249 rounding = r2 < divisor ? 0 < r2 : 2 + (divisor < r2);
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
250 goto use_integer_arithmetic;
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
251 }
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
252
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
253 {
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
254 /* Either the result cannot be computed easily using uintmax_t,
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
255 or from_block_size is zero. Fall back on floating point.
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
256 FIXME: This can yield answers that are slightly off. */
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
257
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
258 long double dto_block_size = to_block_size;
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
259 long double damt = n * (from_block_size / dto_block_size);
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
260 size_t buflen;
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
261 size_t nonintegerlen;
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
262
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
263 if (! (opts & human_autoscale))
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
264 {
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
265 sprintf (buf, "%.0Lf", adjust_value (inexact_style, damt));
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
266 buflen = strlen (buf);
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
267 nonintegerlen = 0;
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
268 }
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
269 else
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
270 {
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
271 long double e = 1;
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
272 exponent = 0;
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
273
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
274 do
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
275 {
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
276 e *= base;
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
277 exponent++;
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
278 }
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
279 while (e * base <= damt && exponent < exponent_max);
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
280
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
281 damt /= e;
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
282
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
283 sprintf (buf, "%.1Lf", adjust_value (inexact_style, damt));
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
284 buflen = strlen (buf);
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
285 nonintegerlen = decimal_pointlen + 1;
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
286
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
287 if (1 + nonintegerlen + ! (opts & human_base_1024) < buflen
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
288 || ((opts & human_suppress_point_zero)
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
289 && buf[buflen - 1] == '0'))
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
290 {
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
291 sprintf (buf, "%.0Lf",
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
292 adjust_value (inexact_style, damt * 10) / 10);
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
293 buflen = strlen (buf);
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
294 nonintegerlen = 0;
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
295 }
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
296 }
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
297
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
298 p = psuffix - buflen;
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
299 memmove (p, buf, buflen);
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
300 integerlim = p + buflen - nonintegerlen;
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
301 }
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
302 goto do_grouping;
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
303
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
304 use_integer_arithmetic:
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
305 {
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
306 /* The computation can be done exactly, with integer arithmetic.
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
307
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
308 Use power of BASE notation if requested and if adjusted AMT is
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
309 large enough. */
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
310
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
311 if (opts & human_autoscale)
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
312 {
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
313 exponent = 0;
1137
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
314
4351
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
315 if (base <= amt)
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
316 {
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
317 do
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
318 {
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
319 unsigned r10 = (amt % base) * 10 + tenths;
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
320 unsigned r2 = (r10 % base) * 2 + (rounding >> 1);
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
321 amt /= base;
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
322 tenths = r10 / base;
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
323 rounding = (r2 < base
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
324 ? (r2 + rounding) != 0
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
325 : 2 + (base < r2 + rounding));
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
326 exponent++;
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
327 }
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
328 while (base <= amt && exponent < exponent_max);
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
329
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
330 if (amt < 10)
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
331 {
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
332 if (inexact_style == human_round_to_nearest
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
333 ? 2 < rounding + (tenths & 1)
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
334 : inexact_style == human_ceiling && 0 < rounding)
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
335 {
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
336 tenths++;
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
337 rounding = 0;
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
338
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
339 if (tenths == 10)
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
340 {
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
341 amt++;
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
342 tenths = 0;
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
343 }
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
344 }
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
345
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
346 if (amt < 10
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
347 && (tenths || ! (opts & human_suppress_point_zero)))
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
348 {
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
349 *--p = '0' + tenths;
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
350 p -= decimal_pointlen;
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
351 memcpy (p, decimal_point, decimal_pointlen);
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
352 tenths = rounding = 0;
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
353 }
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
354 }
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
355 }
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
356 }
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
357
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
358 if (inexact_style == human_ceiling
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
359 ? 0 < tenths + rounding
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
360 : inexact_style == human_round_to_nearest
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
361 ? 5 < tenths + (2 < rounding + (amt & 1))
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
362 : /* inexact_style == human_floor */ 0)
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
363 {
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
364 amt++;
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
365
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
366 if ((opts & human_autoscale)
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
367 && amt == base && exponent < exponent_max)
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
368 {
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
369 exponent++;
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
370 if (! (opts & human_suppress_point_zero))
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
371 {
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
372 *--p = '0';
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
373 p -= decimal_pointlen;
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
374 memcpy (p, decimal_point, decimal_pointlen);
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
375 }
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
376 amt = 1;
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
377 }
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
378 }
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
379
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
380 integerlim = p;
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
381
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
382 do
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
383 {
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
384 int digit = amt % 10;
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
385 *--p = digit + '0';
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
386 }
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
387 while ((amt /= 10) != 0);
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
388 }
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
389
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
390 do_grouping:
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
391 if (opts & human_group_digits)
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
392 p = group_number (p, integerlim - p, grouping, thousands_sep);
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
393
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
394 if (opts & human_SI)
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
395 {
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
396 if (exponent < 0)
1137
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
397 {
4351
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
398 uintmax_t power;
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
399 exponent = 0;
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
400 for (power = 1; power < to_block_size; power *= base)
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
401 if (++exponent == exponent_max)
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
402 break;
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
403 }
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
404
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
405 if (exponent)
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
406 *psuffix++ = (! (opts & human_base_1024) && exponent == 1
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
407 ? 'k'
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
408 : power_letter[exponent]);
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
409
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
410 if (opts & human_B)
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
411 {
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
412 if ((opts & human_base_1024) && exponent)
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
413 *psuffix++ = 'i';
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
414 *psuffix++ = 'B';
1137
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
415 }
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
416 }
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
417
4351
d0d257fdad20 Merge human.c changes from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4333
diff changeset
418 *psuffix = '\0';
1137
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
419
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
420 return p;
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
421 }
1391
c9a7b76bd443 * lib/human.c, lib/human.h (human_readable): Coalesce last two args
Jim Meyering <jim@meyering.net>
parents: 1142
diff changeset
422
c9a7b76bd443 * lib/human.c, lib/human.h (human_readable): Coalesce last two args
Jim Meyering <jim@meyering.net>
parents: 1142
diff changeset
423
c9a7b76bd443 * lib/human.c, lib/human.h (human_readable): Coalesce last two args
Jim Meyering <jim@meyering.net>
parents: 1142
diff changeset
424 /* The default block size used for output. This number may change in
c9a7b76bd443 * lib/human.c, lib/human.h (human_readable): Coalesce last two args
Jim Meyering <jim@meyering.net>
parents: 1142
diff changeset
425 the future as disks get larger. */
c9a7b76bd443 * lib/human.c, lib/human.h (human_readable): Coalesce last two args
Jim Meyering <jim@meyering.net>
parents: 1142
diff changeset
426 #ifndef DEFAULT_BLOCK_SIZE
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427 # define DEFAULT_BLOCK_SIZE 1024
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428 #endif
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429
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430 static char const *const block_size_args[] = { "human-readable", "si", 0 };
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431 static int const block_size_opts[] =
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432 {
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433 human_autoscale + human_SI + human_base_1024,
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434 human_autoscale + human_SI
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435 };
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436
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437 static uintmax_t
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438 default_block_size (void)
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439 {
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440 return getenv ("POSIXLY_CORRECT") ? 512 : DEFAULT_BLOCK_SIZE;
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441 }
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442
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443 static strtol_error
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444 humblock (char const *spec, uintmax_t *block_size, int *options)
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445 {
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446 int i;
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447 int opts = 0;
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448
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449 if (! spec && ! (spec = getenv ("BLOCK_SIZE")))
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450 *block_size = default_block_size ();
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451 else
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452 {
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453 if (*spec == '\'')
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454 {
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455 opts |= human_group_digits;
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456 spec++;
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457 }
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458
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459 if (0 <= (i = ARGMATCH (spec, block_size_args, block_size_opts)))
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460 {
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461 opts |= block_size_opts[i];
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462 *block_size = 1;
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463 }
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464 else
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465 {
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466 char *ptr;
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467 strtol_error e = xstrtoumax (spec, &ptr, 0, block_size,
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468 "eEgGkKmMpPtTyYzZ0");
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469 if (e != LONGINT_OK)
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470 return e;
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471 if (*ptr)
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472 return LONGINT_INVALID_SUFFIX_CHAR;
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473 for (; ! ('0' <= *spec && *spec <= '9'); spec++)
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474 if (spec == ptr)
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475 {
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476 opts |= human_SI;
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477 if (ptr[-1] == 'B')
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478 opts |= human_B;
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479 if (ptr[-1] != 'B' || ptr[-2] == 'i')
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480 opts |= human_base_1024;
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481 break;
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482 }
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483 }
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484 }
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485
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486 *options = opts;
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487 return LONGINT_OK;
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488 }
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489
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490 int
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491 human_options (char const *spec, bool report_errors, uintmax_t *block_size)
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492 {
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493 int opts;
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494 strtol_error e = humblock (spec, block_size, &opts);
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495 if (*block_size == 0)
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496 {
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497 *block_size = default_block_size ();
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498 e = LONGINT_INVALID;
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499 }
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500 if (e != LONGINT_OK && report_errors)
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501 STRTOL_FATAL_ERROR (spec, _("block size"), e);
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502 return opts;
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503 }