From 5e1a84ab74d5e97582427f016f291a8c11e66f99 Mon Sep 17 00:00:00 2001 From: jutteau Date: Fri, 11 May 2007 18:10:19 +0000 Subject: Completion du script de mise à jour de la pc-104 : * Ajout des sources de busybox dans ./conf/busybox/ * Ajout d'un fichier réclamé par les script dans ./conf/busybox.links --- i/pc104/initrd/conf/busybox/libbb/human_readable.c | 89 ++++++++++++++++++++++ 1 file changed, 89 insertions(+) create mode 100644 i/pc104/initrd/conf/busybox/libbb/human_readable.c (limited to 'i/pc104/initrd/conf/busybox/libbb/human_readable.c') diff --git a/i/pc104/initrd/conf/busybox/libbb/human_readable.c b/i/pc104/initrd/conf/busybox/libbb/human_readable.c new file mode 100644 index 0000000..ff1b551 --- /dev/null +++ b/i/pc104/initrd/conf/busybox/libbb/human_readable.c @@ -0,0 +1,89 @@ +/* vi: set sw=4 ts=4: */ +/* + * June 30, 2001 Manuel Novoa III + * + * All-integer version (hey, not everyone has floating point) of + * make_human_readable_str, modified from similar code I had written + * for busybox several months ago. + * + * Notes: + * 1) I'm using an unsigned long long to hold the product size * block_size, + * as df (which calls this routine) could request a representation of a + * partition size in bytes > max of unsigned long. If long longs aren't + * available, it would be possible to do what's needed using polynomial + * representations (say, powers of 1024) and manipulating coefficients. + * The base ten "bytes" output could be handled similarly. + * + * 2) This routine always outputs a decimal point and a tenths digit when + * display_unit != 0. Hence, it isn't uncommon for the returned string + * to have a length of 5 or 6. + * + * It might be nice to add a flag to indicate no decimal digits in + * that case. This could be either an additional parameter, or a + * special value of display_unit. Such a flag would also be nice for du. + * + * Some code to omit the decimal point and tenths digit is sketched out + * and "#if 0"'d below. + */ + +#include +#include "libbb.h" + +const char *make_human_readable_str(unsigned long long size, + unsigned long block_size, unsigned long display_unit) +{ + /* The code will adjust for additional (appended) units. */ + static const char zero_and_units[] = { '0', 0, 'k', 'M', 'G', 'T' }; + static const char fmt[] = "%llu"; + static const char fmt_tenths[] = "%llu.%d%c"; + + static char str[21]; /* Sufficient for 64 bit unsigned integers. */ + + unsigned long long val; + int frac; + const char *u; + const char *f; + + u = zero_and_units; + f = fmt; + frac = 0; + + val = size * block_size; + if (val == 0) { + return u; + } + + if (display_unit) { + val += display_unit/2; /* Deal with rounding. */ + val /= display_unit; /* Don't combine with the line above!!! */ + } else { + ++u; + while ((val >= 1024) + && (u < zero_and_units + sizeof(zero_and_units) - 1) + ) { + f = fmt_tenths; + ++u; + frac = (((int)(val % 1024)) * 10 + 1024/2) / 1024; + val /= 1024; + } + if (frac >= 10) { /* We need to round up here. */ + ++val; + frac = 0; + } +#if 0 + /* Sample code to omit decimal point and tenths digit. */ + if ( /* no_tenths */ 1 ) { + if ( frac >= 5 ) { + ++val; + } + f = "%llu%*c" /* fmt_no_tenths */ ; + frac = 1; + } +#endif + } + + /* If f==fmt then 'frac' and 'u' are ignored. */ + snprintf(str, sizeof(str), f, val, frac, *u); + + return str; +} -- cgit v1.2.3