diff options
Diffstat (limited to 'lib/human.c')
-rw-r--r-- | lib/human.c | 62 |
1 files changed, 43 insertions, 19 deletions
diff --git a/lib/human.c b/lib/human.c index 92b051cae..a9ccf38c4 100644 --- a/lib/human.c +++ b/lib/human.c @@ -1,5 +1,7 @@ /* human.c -- print human readable file size - Copyright (C) 1996, 1997, 1998, 1999, 2000 Free Software Foundation, Inc. + + Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001 Free Software + Foundation, Inc. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -66,16 +68,34 @@ char *getenv (); static const char suffixes[] = { 0, /* not used */ - 'k', /* kilo */ - 'M', /* Mega */ - 'G', /* Giga */ - 'T', /* Tera */ - 'P', /* Peta */ - 'E', /* Exa */ - 'Z', /* Zetta */ - 'Y' /* Yotta */ + 'K', /* kibi ('k' for kilo is a special case) */ + 'M', /* mega or mebi */ + 'G', /* giga or gibi */ + 'T', /* tera or tebi */ + 'P', /* peta or pebi */ + 'E', /* exa or exbi */ + 'Z', /* zetta or 2**70 */ + 'Y' /* yotta or 2**80 */ }; +/* Generate into P[-1] (and possibly P[-2]) the proper suffix for + POWER and BASE. Return the address of the generated suffix. */ +static char * +generate_suffix_backwards (char *p, int power, int base) +{ + char letter = suffixes[power]; + + if (base == 1000) + { + *--p = 'B'; + if (power == 1) + letter = 'k'; + } + + *--p = letter; + return p; +} + /* If INEXACT_STYLE is not human_round_to_even, and if easily possible, adjust VALUE according to the style. */ static double @@ -113,7 +133,7 @@ human_readable (uintmax_t n, char *buf, Use INEXACT_STYLE to determine whether to take the ceiling or floor of any result that cannot be expressed exactly. - If OUTPUT_BLOCK_SIZE is negative, use a format like "127k" if + If OUTPUT_BLOCK_SIZE is negative, use a format like "127K" if possible, using powers of -OUTPUT_BLOCK_SIZE; otherwise, use ordinary decimal format. Normally -OUTPUT_BLOCK_SIZE is either 1000 or 1024; it must be at least 2. Most people visually process @@ -121,9 +141,10 @@ human_readable (uintmax_t n, char *buf, more prone to misinterpretation. Hence, converting to an abbreviated form usually improves readability. Use a suffix indicating which power is being used. For example, assuming - -OUTPUT_BLOCK_SIZE is 1024, 8500 would be converted to 8.3k, + -OUTPUT_BLOCK_SIZE is 1024, 8500 would be converted to 8.3K, 133456345 to 127M, 56990456345 to 53G, and so on. Numbers smaller - than -OUTPUT_BLOCK_SIZE aren't modified. */ + than -OUTPUT_BLOCK_SIZE aren't modified. If -OUTPUT_BLOCK_SIZE is + 1024, append a "B" after any size letter. */ char * human_readable_inexact (uintmax_t n, char *buf, @@ -193,6 +214,8 @@ human_readable_inexact (uintmax_t n, char *buf, sprintf (buf, "%.0f", adjust_value (inexact_style, damt)); else { + char suffix[3]; + char const *psuffix; double e = 1; power = 0; @@ -205,12 +228,13 @@ human_readable_inexact (uintmax_t n, char *buf, damt /= e; - sprintf (buf, "%.1f%c", adjust_value (inexact_style, damt), - suffixes[power]); - if (4 < strlen (buf)) - sprintf (buf, "%.0f%c", - adjust_value (inexact_style, damt * 10) / 10, - suffixes[power]); + suffix[2] = '\0'; + psuffix = generate_suffix_backwards (suffix + 2, power, base); + sprintf (buf, "%.1f%s", + adjust_value (inexact_style, damt), psuffix); + if (4 + (base == 1000) < strlen (buf)) + sprintf (buf, "%.0f%s", + adjust_value (inexact_style, damt * 10) / 10, psuffix); } return buf; @@ -236,7 +260,7 @@ human_readable_inexact (uintmax_t n, char *buf, } while (base <= amt && power < sizeof suffixes - 1); - *--p = suffixes[power]; + p = generate_suffix_backwards (p, power, base); if (amt < 10) { |