/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/* |_o_o|\\ Copyright (c) 1986 The Software Distillery.  All Rights Reserved */
/* |. o.| || This program may not be distributed without the permission of   */
/* | .  | || the authors.                                                    */
/* | o  | ||    Dave Baker     Ed Burnette  Stan Chow    Jay Denebeim        */
/* |  . |//     Gordon Keener  Jack Rouse   John Toebes  Doug Walker         */
/* ======          BBS:(919)-471-6436      VOICE:(919)-469-4210              */ 
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

TSIZE v1.2 by Edmund Burnette
 210 Willoughby Lane, Cary NC 27511   (919)-469-2402
© 1986 The Software Distillery.  All Rights Reserved.
 235 Trillingham Lane, Cary NC 27511  (919)-469-4210  BBS(919)-471-6436

Permission is hereby granted to distribute this program provided both this
documentation accompanies the executable and that no charge is made for its
distribution.

TSIZE is a simple utility to print directory tree sizes.  It displays the
total size of all files and subdirectories within a given directory.  The
format of the TSIZE command is:

   TSIZE directoryname       or
   TSIZE filename            or
   TSIZE

The first format displays the size of the given directory.  The second
does the same for a single file.  The last form does the same for the
current directory.

Note that the sizes reported by TSIZE will be less that the size actually
taken by the files on the disk.  This is because AmigaDOS (like most
operating systems) allocates disk space a block at a time (as opposed to
a byte at a time).  The sizes displayed will be the same as those given by
the LIST command.

EXAMPLE:
   Suppose your df1: disk has a directory called foo on it.  This directory
   has a few files in it, along with two subdirectories called ed and john.
   The ed directory has no subdirectories, but the john directory has
   two subdirectories called v1 and v2.  The v2 directory happens to be
   empty.  Here's what might happen if you ran tsize on foo:

      1> tsize df1:foo

      df1:foo/ed 1205          <- total for ed
      df1:foo/john/v1 1532
      df1:foo/john/v2 0
      df1:foo/john 1532        <- total for john (includes v1 and v2)
      df1:foo 5076             <- final total (includes everything above)

   Note that the john directory does not have any files in it, just more
   directories.  We know this because the total given for john is the
   same as the total of all of its subdirectories.

In order to reduce the size of the executable, I took the following steps:

   1. Compiled _main with the -dTINY option and linked with that.
   2. Specified amiga.lib before lc.lib on the LIBRARY statement of ALINK.
      The purpose of this is to get the version of printf from amiga.lib
      (which is only 2.5k).  This version does not handle floating point and
      expects %d numbers to be 16 bits (use %ld instead).  It also required
      me to initialize an external variable called stdout.
   3. Used Amiga functions directly to handle control-c instead of the
      Lattice functions (like onbreak).
   4. Compiled tsize.c with the -v option to get rid of stack checking
      code.

By doing all these things, I reduced the final size from 12k to 5k using
3.04 beta.  After all, a short utility out to be short, right?  Thanks to
Jack Rouse who suggested these tricks.