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annotate lib/human.c @ 2593:3ebe28cfe9b4

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(adjust_value): New function. (human_readable_inexact): Apply rounding style even when printing approximate values.
author Jim Meyering <jim@meyering.net>
date Fri, 16 Jun 2000 12:51:28 +0000
parents a3c74265aa47
children 0cd372c853e5
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1 /* human.c -- print human readable file size
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2 Copyright (C) 1996, 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
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3
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4 This program is free software; you can redistribute it and/or modify
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5 it under the terms of the GNU General Public License as published by
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6 the Free Software Foundation; either version 2, or (at your option)
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7 any later version.
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8
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9 This program is distributed in the hope that it will be useful,
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10 but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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12 GNU General Public License for more details.
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13
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14 You should have received a copy of the GNU General Public License
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15 along with this program; if not, write to the Free Software Foundation,
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16 Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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17
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18 /* Originally contributed by lm@sgi.com;
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19 --si, output block size selection, and large file support
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20 added by eggert@twinsun.com. */
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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 <sys/types.h>
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27 #include <stdio.h>
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28
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29 #if HAVE_LIMITS_H
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30 # include <limits.h>
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31 #endif
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32
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33 #if HAVE_STRING_H
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34 # include <string.h>
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35 #else
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36 # include <strings.h>
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37 #endif
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38
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39 #ifndef CHAR_BIT
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40 # define CHAR_BIT 8
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41 #endif
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42 #if HAVE_STDLIB_H
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43 # include <stdlib.h>
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44 #endif
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45
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46 #ifndef HAVE_DECL_GETENV
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47 "this configure-time declaration test was not run"
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48 #endif
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49 #if !HAVE_DECL_GETENV
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50 char *getenv ();
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51 #endif
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52
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53 #if ENABLE_NLS
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54 # include <libintl.h>
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55 # define _(Text) gettext (Text)
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56 #else
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57 # define _(Text) Text
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58 #endif
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59
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60 #include <argmatch.h>
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61 #include <error.h>
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62 #include <xstrtol.h>
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63
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64 #include "human.h"
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65
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66 static const char suffixes[] =
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67 {
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68 0, /* not used */
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69 'k', /* kilo */
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70 'M', /* Mega */
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71 'G', /* Giga */
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72 'T', /* Tera */
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73 'P', /* Peta */
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74 'E', /* Exa */
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75 'Z', /* Zetta */
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76 'Y' /* Yotta */
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77 };
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78
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79 /* If INEXACT_STYLE is not human_round_to_even, and if easily
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80 possible, adjust VALUE according to the style. */
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81 static double
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82 adjust_value (enum human_inexact_style inexact_style, double value)
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83 {
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84 /* Do not use the floor or ceil functions, as that would mean
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85 linking with the standard math library, which is a porting pain.
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86 So leave the value alone if it is too large to easily round. */
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87 if (inexact_style != human_round_to_even && value < (uintmax_t) -1)
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88 {
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89 uintmax_t u = value;
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90 value = u + (inexact_style == human_ceiling && u != value);
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91 }
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92
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93 return value;
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94 }
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95
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96 /* Like human_readable_inexact, except always round to even. */
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97 char *
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98 human_readable (uintmax_t n, char *buf,
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99 int from_block_size, int output_block_size)
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100 {
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101 return human_readable_inexact (n, buf, from_block_size, output_block_size,
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102 human_round_to_even);
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103 }
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104
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105 /* Convert N to a human readable format in BUF.
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106
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107 N is expressed in units of FROM_BLOCK_SIZE. FROM_BLOCK_SIZE must
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108 be nonnegative.
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109
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110 OUTPUT_BLOCK_SIZE must be nonzero. If it is positive, use units of
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111 OUTPUT_BLOCK_SIZE in the output number.
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112
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113 Use INEXACT_STYLE to determine whether to take the ceiling or floor
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114 of any result that cannot be expressed exactly.
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115
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116 If OUTPUT_BLOCK_SIZE is negative, use a format like "127k" if
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117 possible, using powers of -OUTPUT_BLOCK_SIZE; otherwise, use
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118 ordinary decimal format. Normally -OUTPUT_BLOCK_SIZE is either
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119 1000 or 1024; it must be at least 2. Most people visually process
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120 strings of 3-4 digits effectively, but longer strings of digits are
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121 more prone to misinterpretation. Hence, converting to an
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122 abbreviated form usually improves readability. Use a suffix
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123 indicating which power is being used. For example, assuming
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124 -OUTPUT_BLOCK_SIZE is 1024, 8500 would be converted to 8.3k,
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125 133456345 to 127M, 56990456345 to 53G, and so on. Numbers smaller
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126 than -OUTPUT_BLOCK_SIZE aren't modified. */
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127
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128 char *
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129 human_readable_inexact (uintmax_t n, char *buf,
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130 int from_block_size, int output_block_size,
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131 enum human_inexact_style inexact_style)
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132 {
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133 uintmax_t amt;
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134 int base;
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135 int to_block_size;
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136 int tenths = 0;
1137
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
137 int power;
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
138 char *p;
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
139
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
140 /* 0 means adjusted N == AMT.TENTHS;
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
141 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
142 2 means adjusted N == AMT.TENTHS + 0.05;
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
143 3 means AMT.TENTHS + 0.05 < adjusted N < AMT.TENTHS + 0.1. */
1848
afab915d3e18 (human_readable): Allow from_block_size to be zero.
Jim Meyering <jim@meyering.net>
parents: 1841
diff changeset
144 int rounding = 0;
1137
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
145
1391
c9a7b76bd443 * lib/human.c, lib/human.h (human_readable): Coalesce last two args
Jim Meyering <jim@meyering.net>
parents: 1142
diff changeset
146 if (output_block_size < 0)
c9a7b76bd443 * lib/human.c, lib/human.h (human_readable): Coalesce last two args
Jim Meyering <jim@meyering.net>
parents: 1142
diff changeset
147 {
c9a7b76bd443 * lib/human.c, lib/human.h (human_readable): Coalesce last two args
Jim Meyering <jim@meyering.net>
parents: 1142
diff changeset
148 base = -output_block_size;
c9a7b76bd443 * lib/human.c, lib/human.h (human_readable): Coalesce last two args
Jim Meyering <jim@meyering.net>
parents: 1142
diff changeset
149 to_block_size = 1;
c9a7b76bd443 * lib/human.c, lib/human.h (human_readable): Coalesce last two args
Jim Meyering <jim@meyering.net>
parents: 1142
diff changeset
150 }
c9a7b76bd443 * lib/human.c, lib/human.h (human_readable): Coalesce last two args
Jim Meyering <jim@meyering.net>
parents: 1142
diff changeset
151 else
c9a7b76bd443 * lib/human.c, lib/human.h (human_readable): Coalesce last two args
Jim Meyering <jim@meyering.net>
parents: 1142
diff changeset
152 {
c9a7b76bd443 * lib/human.c, lib/human.h (human_readable): Coalesce last two args
Jim Meyering <jim@meyering.net>
parents: 1142
diff changeset
153 base = 0;
c9a7b76bd443 * lib/human.c, lib/human.h (human_readable): Coalesce last two args
Jim Meyering <jim@meyering.net>
parents: 1142
diff changeset
154 to_block_size = output_block_size;
c9a7b76bd443 * lib/human.c, lib/human.h (human_readable): Coalesce last two args
Jim Meyering <jim@meyering.net>
parents: 1142
diff changeset
155 }
c9a7b76bd443 * lib/human.c, lib/human.h (human_readable): Coalesce last two args
Jim Meyering <jim@meyering.net>
parents: 1142
diff changeset
156
1137
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
157 p = buf + LONGEST_HUMAN_READABLE;
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
158 *p = '\0';
1142
ff40370aead6 (human_readable): Convert to ANSI-style definition.
Jim Meyering <jim@meyering.net>
parents: 1137
diff changeset
159
ff40370aead6 (human_readable): Convert to ANSI-style definition.
Jim Meyering <jim@meyering.net>
parents: 1137
diff changeset
160 #ifdef lint
ff40370aead6 (human_readable): Convert to ANSI-style definition.
Jim Meyering <jim@meyering.net>
parents: 1137
diff changeset
161 /* Suppress `used before initialized' warning. */
ff40370aead6 (human_readable): Convert to ANSI-style definition.
Jim Meyering <jim@meyering.net>
parents: 1137
diff changeset
162 power = 0;
ff40370aead6 (human_readable): Convert to ANSI-style definition.
Jim Meyering <jim@meyering.net>
parents: 1137
diff changeset
163 #endif
1137
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
164
1391
c9a7b76bd443 * lib/human.c, lib/human.h (human_readable): Coalesce last two args
Jim Meyering <jim@meyering.net>
parents: 1142
diff changeset
165 /* Adjust AMT out of FROM_BLOCK_SIZE units and into TO_BLOCK_SIZE units. */
1142
ff40370aead6 (human_readable): Convert to ANSI-style definition.
Jim Meyering <jim@meyering.net>
parents: 1137
diff changeset
166
2593
3ebe28cfe9b4 (adjust_value): New function.
Jim Meyering <jim@meyering.net>
parents: 2590
diff changeset
167 {
3ebe28cfe9b4 (adjust_value): New function.
Jim Meyering <jim@meyering.net>
parents: 2590
diff changeset
168 int multiplier;
3ebe28cfe9b4 (adjust_value): New function.
Jim Meyering <jim@meyering.net>
parents: 2590
diff changeset
169 int divisor;
3ebe28cfe9b4 (adjust_value): New function.
Jim Meyering <jim@meyering.net>
parents: 2590
diff changeset
170 int r2;
3ebe28cfe9b4 (adjust_value): New function.
Jim Meyering <jim@meyering.net>
parents: 2590
diff changeset
171 int r10;
3ebe28cfe9b4 (adjust_value): New function.
Jim Meyering <jim@meyering.net>
parents: 2590
diff changeset
172 if (to_block_size <= from_block_size
3ebe28cfe9b4 (adjust_value): New function.
Jim Meyering <jim@meyering.net>
parents: 2590
diff changeset
173 ? (from_block_size % to_block_size != 0
3ebe28cfe9b4 (adjust_value): New function.
Jim Meyering <jim@meyering.net>
parents: 2590
diff changeset
174 || (multiplier = from_block_size / to_block_size,
3ebe28cfe9b4 (adjust_value): New function.
Jim Meyering <jim@meyering.net>
parents: 2590
diff changeset
175 (amt = n * multiplier) / multiplier != n))
3ebe28cfe9b4 (adjust_value): New function.
Jim Meyering <jim@meyering.net>
parents: 2590
diff changeset
176 : (from_block_size == 0
3ebe28cfe9b4 (adjust_value): New function.
Jim Meyering <jim@meyering.net>
parents: 2590
diff changeset
177 || to_block_size % from_block_size != 0
3ebe28cfe9b4 (adjust_value): New function.
Jim Meyering <jim@meyering.net>
parents: 2590
diff changeset
178 || (divisor = to_block_size / from_block_size,
3ebe28cfe9b4 (adjust_value): New function.
Jim Meyering <jim@meyering.net>
parents: 2590
diff changeset
179 r10 = (n % divisor) * 10,
3ebe28cfe9b4 (adjust_value): New function.
Jim Meyering <jim@meyering.net>
parents: 2590
diff changeset
180 r2 = (r10 % divisor) * 2,
3ebe28cfe9b4 (adjust_value): New function.
Jim Meyering <jim@meyering.net>
parents: 2590
diff changeset
181 amt = n / divisor,
3ebe28cfe9b4 (adjust_value): New function.
Jim Meyering <jim@meyering.net>
parents: 2590
diff changeset
182 tenths = r10 / divisor,
3ebe28cfe9b4 (adjust_value): New function.
Jim Meyering <jim@meyering.net>
parents: 2590
diff changeset
183 rounding = r2 < divisor ? 0 < r2 : 2 + (divisor < r2),
3ebe28cfe9b4 (adjust_value): New function.
Jim Meyering <jim@meyering.net>
parents: 2590
diff changeset
184 0)))
3ebe28cfe9b4 (adjust_value): New function.
Jim Meyering <jim@meyering.net>
parents: 2590
diff changeset
185 {
3ebe28cfe9b4 (adjust_value): New function.
Jim Meyering <jim@meyering.net>
parents: 2590
diff changeset
186 /* Either the result cannot be computed easily using uintmax_t,
3ebe28cfe9b4 (adjust_value): New function.
Jim Meyering <jim@meyering.net>
parents: 2590
diff changeset
187 or from_block_size is zero. Fall back on floating point.
3ebe28cfe9b4 (adjust_value): New function.
Jim Meyering <jim@meyering.net>
parents: 2590
diff changeset
188 FIXME: This can yield answers that are slightly off. */
1137
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
189
2593
3ebe28cfe9b4 (adjust_value): New function.
Jim Meyering <jim@meyering.net>
parents: 2590
diff changeset
190 double damt = n * (from_block_size / (double) to_block_size);
1137
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
191
2593
3ebe28cfe9b4 (adjust_value): New function.
Jim Meyering <jim@meyering.net>
parents: 2590
diff changeset
192 if (! base)
3ebe28cfe9b4 (adjust_value): New function.
Jim Meyering <jim@meyering.net>
parents: 2590
diff changeset
193 sprintf (buf, "%.0f", adjust_value (inexact_style, damt));
3ebe28cfe9b4 (adjust_value): New function.
Jim Meyering <jim@meyering.net>
parents: 2590
diff changeset
194 else
3ebe28cfe9b4 (adjust_value): New function.
Jim Meyering <jim@meyering.net>
parents: 2590
diff changeset
195 {
3ebe28cfe9b4 (adjust_value): New function.
Jim Meyering <jim@meyering.net>
parents: 2590
diff changeset
196 double e = 1;
3ebe28cfe9b4 (adjust_value): New function.
Jim Meyering <jim@meyering.net>
parents: 2590
diff changeset
197 power = 0;
3ebe28cfe9b4 (adjust_value): New function.
Jim Meyering <jim@meyering.net>
parents: 2590
diff changeset
198
3ebe28cfe9b4 (adjust_value): New function.
Jim Meyering <jim@meyering.net>
parents: 2590
diff changeset
199 do
3ebe28cfe9b4 (adjust_value): New function.
Jim Meyering <jim@meyering.net>
parents: 2590
diff changeset
200 {
3ebe28cfe9b4 (adjust_value): New function.
Jim Meyering <jim@meyering.net>
parents: 2590
diff changeset
201 e *= base;
3ebe28cfe9b4 (adjust_value): New function.
Jim Meyering <jim@meyering.net>
parents: 2590
diff changeset
202 power++;
3ebe28cfe9b4 (adjust_value): New function.
Jim Meyering <jim@meyering.net>
parents: 2590
diff changeset
203 }
3ebe28cfe9b4 (adjust_value): New function.
Jim Meyering <jim@meyering.net>
parents: 2590
diff changeset
204 while (e * base <= damt && power < sizeof suffixes - 1);
1137
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
205
2593
3ebe28cfe9b4 (adjust_value): New function.
Jim Meyering <jim@meyering.net>
parents: 2590
diff changeset
206 damt /= e;
2590
a3c74265aa47 (human_readable_inexact): Allow an input block
Jim Meyering <jim@meyering.net>
parents: 2293
diff changeset
207
2593
3ebe28cfe9b4 (adjust_value): New function.
Jim Meyering <jim@meyering.net>
parents: 2590
diff changeset
208 sprintf (buf, "%.1f%c", adjust_value (inexact_style, damt),
3ebe28cfe9b4 (adjust_value): New function.
Jim Meyering <jim@meyering.net>
parents: 2590
diff changeset
209 suffixes[power]);
3ebe28cfe9b4 (adjust_value): New function.
Jim Meyering <jim@meyering.net>
parents: 2590
diff changeset
210 if (4 < strlen (buf))
3ebe28cfe9b4 (adjust_value): New function.
Jim Meyering <jim@meyering.net>
parents: 2590
diff changeset
211 sprintf (buf, "%.0f%c",
3ebe28cfe9b4 (adjust_value): New function.
Jim Meyering <jim@meyering.net>
parents: 2590
diff changeset
212 adjust_value (inexact_style, damt * 10) / 10,
3ebe28cfe9b4 (adjust_value): New function.
Jim Meyering <jim@meyering.net>
parents: 2590
diff changeset
213 suffixes[power]);
3ebe28cfe9b4 (adjust_value): New function.
Jim Meyering <jim@meyering.net>
parents: 2590
diff changeset
214 }
2590
a3c74265aa47 (human_readable_inexact): Allow an input block
Jim Meyering <jim@meyering.net>
parents: 2293
diff changeset
215
2593
3ebe28cfe9b4 (adjust_value): New function.
Jim Meyering <jim@meyering.net>
parents: 2590
diff changeset
216 return buf;
3ebe28cfe9b4 (adjust_value): New function.
Jim Meyering <jim@meyering.net>
parents: 2590
diff changeset
217 }
3ebe28cfe9b4 (adjust_value): New function.
Jim Meyering <jim@meyering.net>
parents: 2590
diff changeset
218 }
1142
ff40370aead6 (human_readable): Convert to ANSI-style definition.
Jim Meyering <jim@meyering.net>
parents: 1137
diff changeset
219
1137
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
220 /* Use power of BASE notation if adjusted AMT is large enough. */
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
221
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
222 if (base && base <= amt)
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
223 {
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
224 power = 0;
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
225
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
226 do
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
227 {
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
228 int r10 = (amt % base) * 10 + tenths;
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
229 int r2 = (r10 % base) * 2 + (rounding >> 1);
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
230 amt /= base;
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
231 tenths = r10 / base;
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
232 rounding = (r2 < base
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
233 ? 0 < r2 + rounding
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
234 : 2 + (base < r2 + rounding));
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
235 power++;
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
236 }
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
237 while (base <= amt && power < sizeof suffixes - 1);
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
238
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
239 *--p = suffixes[power];
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 if (amt < 10)
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
242 {
1863
e6b535c4a46e (human_readable): New function.
Jim Meyering <jim@meyering.net>
parents: 1848
diff changeset
243 if (2 * (1 - (int) inexact_style)
e6b535c4a46e (human_readable): New function.
Jim Meyering <jim@meyering.net>
parents: 1848
diff changeset
244 < rounding + (tenths & (inexact_style == human_round_to_even)))
e6b535c4a46e (human_readable): New function.
Jim Meyering <jim@meyering.net>
parents: 1848
diff changeset
245 {
e6b535c4a46e (human_readable): New function.
Jim Meyering <jim@meyering.net>
parents: 1848
diff changeset
246 tenths++;
e6b535c4a46e (human_readable): New function.
Jim Meyering <jim@meyering.net>
parents: 1848
diff changeset
247 rounding = 0;
1137
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
248
1863
e6b535c4a46e (human_readable): New function.
Jim Meyering <jim@meyering.net>
parents: 1848
diff changeset
249 if (tenths == 10)
e6b535c4a46e (human_readable): New function.
Jim Meyering <jim@meyering.net>
parents: 1848
diff changeset
250 {
e6b535c4a46e (human_readable): New function.
Jim Meyering <jim@meyering.net>
parents: 1848
diff changeset
251 amt++;
e6b535c4a46e (human_readable): New function.
Jim Meyering <jim@meyering.net>
parents: 1848
diff changeset
252 tenths = 0;
e6b535c4a46e (human_readable): New function.
Jim Meyering <jim@meyering.net>
parents: 1848
diff changeset
253 }
1137
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
254 }
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
255
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
256 if (amt < 10)
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
257 {
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
258 *--p = '0' + tenths;
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
259 *--p = '.';
1863
e6b535c4a46e (human_readable): New function.
Jim Meyering <jim@meyering.net>
parents: 1848
diff changeset
260 tenths = rounding = 0;
1137
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
261 }
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
262 }
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
263 }
1142
ff40370aead6 (human_readable): Convert to ANSI-style definition.
Jim Meyering <jim@meyering.net>
parents: 1137
diff changeset
264
1863
e6b535c4a46e (human_readable): New function.
Jim Meyering <jim@meyering.net>
parents: 1848
diff changeset
265 if (inexact_style == human_ceiling
e6b535c4a46e (human_readable): New function.
Jim Meyering <jim@meyering.net>
parents: 1848
diff changeset
266 ? 0 < tenths + rounding
e6b535c4a46e (human_readable): New function.
Jim Meyering <jim@meyering.net>
parents: 1848
diff changeset
267 : inexact_style == human_round_to_even
e6b535c4a46e (human_readable): New function.
Jim Meyering <jim@meyering.net>
parents: 1848
diff changeset
268 ? 5 < tenths + (2 < rounding + (amt & 1))
e6b535c4a46e (human_readable): New function.
Jim Meyering <jim@meyering.net>
parents: 1848
diff changeset
269 : /* inexact_style == human_floor */ 0)
1137
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
270 {
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
271 amt++;
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
272
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
273 if (amt == base && power < sizeof suffixes - 1)
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
274 {
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
275 *p = suffixes[power + 1];
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
276 *--p = '0';
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
277 *--p = '.';
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
278 amt = 1;
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
279 }
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
280 }
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
281
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
282 do
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
283 *--p = '0' + (int) (amt % 10);
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
284 while ((amt /= 10) != 0);
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
285
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
286 return p;
2c9059ccc457 New file. The interface is inspired
Jim Meyering <jim@meyering.net>
parents:
diff changeset
287 }
1391
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288
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289
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290 /* The default block size used for output. This number may change in
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291 the future as disks get larger. */
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292 #ifndef DEFAULT_BLOCK_SIZE
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293 # define DEFAULT_BLOCK_SIZE 1024
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294 #endif
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295
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296 static char const *const block_size_args[] = { "human-readable", "si", 0 };
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297 static int const block_size_types[] = { -1024, -1000 };
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298
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299 static int
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300 default_block_size (void)
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301 {
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302 return getenv ("POSIXLY_CORRECT") ? 512 : DEFAULT_BLOCK_SIZE;
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303 }
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304
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305 static strtol_error
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306 humblock (char const *spec, int *block_size)
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307 {
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308 int i;
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309
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310 if (! spec && ! (spec = getenv ("BLOCK_SIZE")))
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311 *block_size = default_block_size ();
1596
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312 else if (0 <= (i = ARGMATCH (spec, block_size_args, block_size_types)))
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313 *block_size = block_size_types[i];
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314 else
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315 {
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316 char *ptr;
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317 unsigned long val;
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318 strtol_error e = xstrtoul (spec, &ptr, 0, &val, "eEgGkKmMpPtTyYzZ0");
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319 if (e != LONGINT_OK)
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320 return e;
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321 if (*ptr)
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322 return LONGINT_INVALID_SUFFIX_CHAR;
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323 if ((int) val < 0 || val != (int) val)
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324 return LONGINT_OVERFLOW;
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325 *block_size = (int) val;
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326 }
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327
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328 return LONGINT_OK;
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329 }
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330
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331 void
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332 human_block_size (char const *spec, int report_errors, int *block_size)
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333 {
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334 strtol_error e = humblock (spec, block_size);
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335 if (*block_size == 0)
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336 {
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337 *block_size = default_block_size ();
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338 e = LONGINT_INVALID;
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339 }
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340 if (e != LONGINT_OK && report_errors)
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341 STRTOL_FATAL_ERROR (spec, _("block size"), e);
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342 }