X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=lib%2Fhuman.c;h=6d91b8c1b7f00012484d2a46b822c6dab86cc74a;hb=98a354147cdb6d15365600fac33d492d7387996f;hp=f7dcdfb2a890ba63acf4e5459d9310f416eb5c07;hpb=f8715f3aef61f46759c775b99f25c8726267b2ac;p=gnulib.git

diff --git a/lib/human.c b/lib/human.c
index f7dcdfb2a..6d91b8c1b 100644
--- a/lib/human.c
+++ b/lib/human.c
@@ -23,10 +23,6 @@
 # include <config.h>
 #endif
 
-#if HAVE_INTTYPES_H
-# include <inttypes.h>
-#endif
-
 #include <sys/types.h>
 #include <stdio.h>
 
@@ -34,6 +30,12 @@
 # include <limits.h>
 #endif
 
+#if HAVE_STRING_H
+# include <string.h>
+#else
+# include <strings.h>
+#endif
+
 #ifndef CHAR_BIT
 # define CHAR_BIT 8
 #endif
@@ -54,7 +56,7 @@ char *getenv ();
 
 #include <argmatch.h>
 #include <error.h>
-#include <xstrtoul.h>
+#include <xstrtol.h>
 
 #include "human.h"
 
@@ -71,15 +73,27 @@ static const char suffixes[] =
   'Y'	/* Yotta */
 };
 
+/* Like human_readable_inexact, except always round to even.  */
+char *
+human_readable (uintmax_t n, char *buf,
+		int from_block_size, int output_block_size)
+{
+  return human_readable_inexact (n, buf, from_block_size, output_block_size,
+				 human_round_to_even);
+}
+
 /* Convert N to a human readable format in BUF.
 
    N is expressed in units of FROM_BLOCK_SIZE.  FROM_BLOCK_SIZE must
-   be positive.
+   be nonnegative.
 
    If OUTPUT_BLOCK_SIZE is positive, use units of OUTPUT_BLOCK_SIZE in
    the output number.  OUTPUT_BLOCK_SIZE must be a multiple of
    FROM_BLOCK_SIZE or vice versa.
 
+   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
    possible, using powers of -OUTPUT_BLOCK_SIZE; otherwise, use
    ordinary decimal format.  Normally -OUTPUT_BLOCK_SIZE is either
@@ -93,13 +107,14 @@ static const char suffixes[] =
    than -OUTPUT_BLOCK_SIZE aren't modified.  */
 
 char *
-human_readable (uintmax_t n, char *buf,
-		int from_block_size, int output_block_size)
+human_readable_inexact (uintmax_t n, char *buf,
+			int from_block_size, int output_block_size,
+			enum human_inexact_style inexact_style)
 {
   uintmax_t amt;
   int base;
   int to_block_size;
-  int tenths;
+  int tenths = 0;
   int power;
   char *p;
 
@@ -107,7 +122,7 @@ human_readable (uintmax_t n, char *buf,
      1 means AMT.TENTHS < adjusted N < AMT.TENTHS + 0.05;
      2 means adjusted N == AMT.TENTHS + 0.05;
      3 means AMT.TENTHS + 0.05 < adjusted N < AMT.TENTHS + 0.1.  */
-  int rounding;
+  int rounding = 0;
 
   if (output_block_size < 0)
     {
@@ -134,7 +149,6 @@ human_readable (uintmax_t n, char *buf,
     {
       int multiplier = from_block_size / to_block_size;
       amt = n * multiplier;
-      tenths = rounding = 0;
 
       if (amt / multiplier != n)
 	{
@@ -170,6 +184,8 @@ human_readable (uintmax_t n, char *buf,
 	  return buf;
 	}
     }
+  else if (from_block_size == 0)
+    amt = 0;
   else
     {
       int divisor = to_block_size / from_block_size;
@@ -204,24 +220,33 @@ human_readable (uintmax_t n, char *buf,
 
       if (amt < 10)
 	{
-	  tenths += 2 < rounding + (tenths & 1);
-
-	  if (tenths == 10)
+	  if (2 * (1 - (int) inexact_style)
+	      < rounding + (tenths & (inexact_style == human_round_to_even)))
 	    {
-	      amt++;
-	      tenths = 0;
+	      tenths++;
+	      rounding = 0;
+
+	      if (tenths == 10)
+		{
+		  amt++;
+		  tenths = 0;
+		}
 	    }
 
 	  if (amt < 10)
 	    {
 	      *--p = '0' + tenths;
 	      *--p = '.';
-	      tenths = 0;
+	      tenths = rounding = 0;
 	    }
 	}
     }
 
-  if (5 < tenths + (2 < rounding + (amt & 1)))
+  if (inexact_style == human_ceiling
+      ? 0 < tenths + rounding
+      : inexact_style == human_round_to_even
+      ? 5 < tenths + (2 < rounding + (amt & 1))
+      : /* inexact_style == human_floor */ 0)
     {
       amt++;