Add print_human_readable_size() function.

[pintos-anon] / src / lib / stdio.c

diff --git a/src/lib/stdio.c b/src/lib/stdio.c
index 4b0ba1967f2698bbce124fd4cad9bfb3ac17ff95..3549d4e9fd70f854880cb9a87cc26bfcee8f91d4 100644 (file)
--- a/src/lib/stdio.c
+++ b/src/lib/stdio.c
@@ -469,31 +469,27 @@ format_integer (uintmax_t value, bool negative, const struct integer_base *b,
   const char *signifier;        /* b->signifier or "". */
   int precision;                /* Rendered precision. */
   int pad_cnt;                  /* # of pad characters to fill field width. */
-  int group_cnt;                /* # of digits grouped so far. */
+  int digit_cnt;                /* # of digits output so far. */
 
   /* Accumulate digits into buffer.
      This algorithm produces digits in reverse order, so later we
      will output the buffer's content in reverse.  This is also
      the reason that later we append zeros and the sign. */
   cp = buf;
-  group_cnt = 0;
+  digit_cnt = 0;
   while (value > 0) 
     {
-      if ((c->flags & GROUP) && group_cnt++ == b->group) 
-        {
-          *cp++ = ',';
-          group_cnt = 0; 
-        }
+      if ((c->flags & GROUP) && digit_cnt > 0 && digit_cnt % b->group == 0)
+        *cp++ = ',';
       *cp++ = b->digits[value % b->base];
       value /= b->base;
+      digit_cnt++;
     }
 
   /* Append enough zeros to match precision.
      If requested precision is 0, then a value of zero is
      rendered as a null string, otherwise as "0". */
   precision = c->precision < 0 ? 1 : c->precision;
-  if (precision < 0)
-    precision = 1;
   while (cp - buf < precision && cp - buf < (int) sizeof buf - 8)
     *cp++ = '0';
 
@@ -612,3 +608,21 @@ hex_dump (uintptr_t ofs, const void *buf_, size_t size, bool ascii)
       size -= n;
     }
 }
+
+/* Prints SIZE, which represents a number of bytes, in a
+   human-readable format, e.g. "256 kB". */
+void
+print_human_readable_size (uint64_t size) 
+{
+  if (size == 1)
+    printf ("1 byte");
+  else 
+    {
+      static const char *factors[] = {"bytes", "kB", "MB", "GB", "TB", NULL};
+      const char **fp;
+
+      for (fp = factors; size >= 1024 && fp[1] != NULL; fp++)
+        size /= 1024;
+      printf ("%"PRIu64" %s", *fp);
+    }
+}