X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=lib%2Fhuman.h;h=44b8b36d571eebc2131cfb97e806d87bc4cf6c77;hb=2261dd45772d0344092bbecd9ecc9e6164a6c4e3;hp=de54bf8e9983248b1bf12e623c0fd9d9e5de99ad;hpb=c65fe04fafc9af53ae9229c4563313e3358eabda;p=gnulib.git

diff --git a/lib/human.h b/lib/human.h
index de54bf8e9..44b8b36d5 100644
--- a/lib/human.h
+++ b/lib/human.h
@@ -1,22 +1,83 @@
+/* human.h -- print human readable file size
+
+   Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
+   2005, 2006 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
+   the Free Software Foundation; either version 2, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software Foundation,
+   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+
+/* Written by Paul Eggert and Larry McVoy.  */
+
 #ifndef HUMAN_H_
 # define HUMAN_H_ 1
 
+# include <limits.h>
+# include <stdbool.h>
+# include <stdint.h>
+# include <unistd.h>
+
 /* A conservative bound on the maximum length of a human-readable string.
-   The output can be the product of the largest uintmax_t and the largest int,
-   so add their sizes before converting to a bound on digits.  */
-# define LONGEST_HUMAN_READABLE ((sizeof (uintmax_t) + sizeof (int)) \
-				 * CHAR_BIT / 3)
-
-# ifndef PARAMS
-#  if defined PROTOTYPES || (defined __STDC__ && __STDC__)
-#   define PARAMS(Args) Args
-#  else
-#   define PARAMS(Args) ()
-#  endif
-# endif
-
-char *human_readable PARAMS ((uintmax_t, char *, int, int));
-
-void human_block_size PARAMS ((char const *, int, int *));
+   The output can be the square of the largest uintmax_t, so double
+   its size before converting to a bound.
+   log10 (2.0) < 146/485.  Add 1 for integer division truncation.
+   Also, the output can have a thousands separator between every digit,
+   so multiply by MB_LEN_MAX + 1 and then subtract MB_LEN_MAX.
+   Append 1 for a space before the suffix.
+   Finally, append 3, the maximum length of a suffix.  */
+# define LONGEST_HUMAN_READABLE \
+  ((2 * sizeof (uintmax_t) * CHAR_BIT * 146 / 485 + 1) * (MB_LEN_MAX + 1) \
+   - MB_LEN_MAX + 1 + 3)
+
+/* Options for human_readable.  */
+enum
+{
+  /* Unless otherwise specified these options may be ORed together.  */
+
+  /* The following three options are mutually exclusive.  */
+  /* Round to plus infinity (default).  */
+  human_ceiling = 0,
+  /* Round to nearest, ties to even.  */
+  human_round_to_nearest = 1,
+  /* Round to minus infinity.  */
+  human_floor = 2,
+
+  /* Group digits together, e.g. `1,000,000'.  This uses the
+     locale-defined grouping; the traditional C locale does not group,
+     so this has effect only if some other locale is in use.  */
+  human_group_digits = 4,
+
+  /* When autoscaling, suppress ".0" at end.  */
+  human_suppress_point_zero = 8,
+
+  /* Scale output and use SI-style units, ignoring the output block size.  */
+  human_autoscale = 16,
+
+  /* Prefer base 1024 to base 1000.  */
+  human_base_1024 = 32,
+
+  /* Prepend " " before unit symbol.  */
+  human_space_before_unit = 64,
+
+  /* Append SI prefix, e.g. "k" or "M".  */
+  human_SI = 128,
+
+  /* Append "B" (if base 1000) or "iB" (if base 1024) to SI prefix.  */
+  human_B = 256
+};
+
+char *human_readable (uintmax_t, char *, int, uintmax_t, uintmax_t);
+
+int human_options (char const *, bool, uintmax_t *);
 
 #endif /* HUMAN_H_ */