From 4aca87515a5083ae0e31ce3177189fd43b6d05ac Mon Sep 17 00:00:00 2001
From: Andreas Baumann <mail@andreasbaumann.cc>
Date: Sat, 3 Jan 2015 13:58:15 +0100
Subject: patch to Vanilla Tomato 1.28

---
 release/src/router/busybox/libbb/human_readable.c | 71 +++++++++++++++--------
 1 file changed, 46 insertions(+), 25 deletions(-)

(limited to 'release/src/router/busybox/libbb/human_readable.c')

diff --git a/release/src/router/busybox/libbb/human_readable.c b/release/src/router/busybox/libbb/human_readable.c
index 21e13dc4..05e7d86e 100644
--- a/release/src/router/busybox/libbb/human_readable.c
+++ b/release/src/router/busybox/libbb/human_readable.c
@@ -1,3 +1,4 @@
+/* vi: set sw=4 ts=4: */
 /*
  * June 30, 2001                 Manuel Novoa III
  *
@@ -13,8 +14,8 @@
  *      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 
+ *   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
@@ -23,52 +24,72 @@
  *
  *      Some code to omit the decimal point and tenths digit is sketched out
  *      and "#if 0"'d below.
+ *
+ * Licensed under GPLv2, see file LICENSE in this tarball for details.
  */
 
-#include <stdio.h>
 #include "libbb.h"
 
-const char *make_human_readable_str(unsigned long size, 
-									unsigned long block_size,
-									unsigned long display_unit)
+const char* FAST_FUNC 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[] = "%Lu";
-	static const char fmt_tenths[] = "%Lu.%d%c";
+	/* The code will adjust for additional (appended) units */
+	static const char unit_chars[] ALIGN1 = {
+		'\0', 'K', 'M', 'G', 'T', 'P', 'E'
+	};
+	static const char fmt[] ALIGN1 = "%llu";
+	static const char fmt_tenths[] ALIGN1 = "%llu.%d%c";
+
+	static char str[21] ALIGN1;  /* Sufficient for 64 bit unsigned integers */
 
-	static char str[21];		/* Sufficient for 64 bit unsigned integers. */
-	
 	unsigned long long val;
 	int frac;
 	const char *u;
 	const char *f;
+	smallint no_tenths;
 
-	u = zero_and_units;
-	f = fmt;
-	frac = 0;
+	if (size == 0)
+		return "0";
 
-	val = ((unsigned long long) size) * block_size;
-	if (val == 0) {
-		return u;
+	/* If block_size is 0 then do not print tenths */
+	no_tenths = 0;
+	if (block_size == 0) {
+		no_tenths = 1;
+		block_size = 1;
 	}
 
+	u = unit_chars;
+	val = size * block_size;
+	f = fmt;
+	frac = 0;
+
 	if (display_unit) {
-		val += display_unit/2;	/* Deal with rounding. */
+		val += display_unit/2;	/* Deal with rounding */
 		val /= display_unit;	/* Don't combine with the line above!!! */
+		/* will just print it as ulonglong (below) */
 	} else {
-		++u;
-		while ((val >= KILOBYTE)
-			   && (u < zero_and_units + sizeof(zero_and_units) - 1)) {
+		while ((val >= 1024)
+		 && (u < unit_chars + sizeof(unit_chars) - 1)
+		) {
 			f = fmt_tenths;
-			++u;
-			frac = ((((int)(val % KILOBYTE)) * 10) + (KILOBYTE/2)) / KILOBYTE;
-			val /= KILOBYTE;
+			u++;
+			frac = (((int)(val % 1024)) * 10 + 1024/2) / 1024;
+			val /= 1024;
 		}
 		if (frac >= 10) {		/* We need to round up here. */
 			++val;
 			frac = 0;
 		}
+#if 1
+		/* Sample code to omit decimal point and tenths digit. */
+		if (no_tenths) {
+			if (frac >= 5) {
+				++val;
+			}
+			f = "%llu%*c" /* fmt_no_tenths */;
+			frac = 1;
+		}
+#endif
 	}
 
 	/* If f==fmt then 'frac' and 'u' are ignored. */
-- 
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