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1992-09-25
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CSAP - Sort And Pack Directories [C source]
Author: Don A. Williams
Version: 3.2.1 Date: September 25, 1992
This version reinstates the "truncate" option that was destroyed by version
3.2.0. It also fixes a long standing error it writing the second copy of the
FAT when a directory has been truncated. The version/date printout are
corrected in this version too!
Version: 3.2.0 Date: February 20, 1992
A total reimplementation of the handling of erased entries that eliminates the
"cross linked files" problem. Evidently, some of the disk organizers pay no
attention to the "end of directory" sentinel unless it occurs at the physical
end of the directory. CSAP now zero-sets all entries at the end of the
directory. The truncate directory option is, temporarily, crippled in this
version.
Version: 3.1.2 Date: February 19, 1992
Minor change in the handling of erased entries in an attempt, only partially
successful, to eliminate the "cross linked files" problem that occurs when
CSAP is used in conjunction with some of the "disk organizer" programs,
notably Central Point Software'a COMPRESS and the Shareware DOG.
Version: 3.1.1 Date: February 14, 1991
Made a very minor change to allow CSAP to run under MS-DOS 5.0. The change
amounted to nothing more than allowing "5" as a DOS version number.
Version: 3.1.0 Date: July 11, 1990
Repaired a rather major problem with the '-t', Truncate Directories,
option and empty directories. If there was a directory consisting of
nothing but erased files and CSAP was executed WITHOUT the '-t' option
and, later, CSAP was executed WITH the '-t' option, many bad things
including corruption of the disk could occur! Also corrected the count of
freed clusters which was one too high and added a count of the freed bytes to
the message.
Version: 3.0.2 Date: June 20, 1990
Since the absread() and abswrite() functions provided with version 1.0
of Borland International's Turbo C++ support the long sector addresses
required by partitions larger than 32 meg, the special routines used by CSAP
are no longer needed and have been removed. The GetDPB() function was
recoded to eliminate assembly language at the same time. Added a message
showing the number of clusters freed by the "Truncate Directories" option,
'-t', and fixed a small bug in the truncation routine.
Version: 3.0.1 Date: June 18, 1990
Version 3.0.1 of CSAP is nothing more than a recompilation of CSAP using
Turbo C++ 1.0. It is slightly smaller and slightly faster than CSAP 3.0.0.
Version: 3.0.0 Date: May 11, 1990
Version 3.0.0 of CSAP can handle MS-DOS 4.xx and DR DOS 3.xx large
partitions. It also introduces the optional ability to truncate
directories, i.e. release unused directory disk space back to the free
space pool. CSAP now uses Chris Blum's Absolute Disk I/O modifications but
only the OBJ file for the Compact model in included in the CSAP ZIP. The
entire package is available on CompuServ in IBMPRO Library #3 as
ABRD40.ARC. Version 3.0.0 of CSAP MUST be regarded as a "beta test" version -
there are now many different possible configurations and I have not been
able to test them all. It has been tested with MS-DOS 3.3 on the small
partitions that 3.3 can handle and with MS-DOS 4.01 and DR DOS 3.41 on
small partitions and on large partitions up to 70 meg. I would highly
recommend that you take a full save of your hard disk before using CSAP 3.0.0
until you are sure that it works with your particular setup.
Version 2.1.1 of CSAP corrects the incorrect sorting on Date/Time that was
reintroduced in CSAP 2.0.9 and later versions. Thanks to David Klatzco for
reporting it.
Version 2.1.0 of CSAP corrects the handling of the '.' and '..' directory
specifiers and adds the documentation of the '-V' option to CSAP.DOC (the
'-V' has been operative in the program for some time but was left out of the
documentation.)
CSAP is composed of 5 modules; CSAP.C, SORTDIR.C, ISDEV.C.C, GETDPB.C,
and ABSREAD.OBJ. The current version of CSAP, CSAP 3.0.0ß, has been
designed for compilation with Borland International's Turbo C 2.0. The
module ISDEV.C could be replaced by Turbo C's supplied function isatty(),
however, I plan to extend ISDEV.C to distinguish among files, CON, AUX, and
the printer. The function isatty() just distinguishes between files and the
others.
GETDPB.C cannot be compiled in Turbo C's interactive environment (TC). It is
primarily inline ASM code and requires the more conventional environment
provided by Turbo C's TCC command. As a result, CSAP was designed to be
compiled through the use of a MAKEFILE and the MAKE facility of Turbo C.
CSAP currently compiles and executes correctly in any of Turbo C's
supported memory models except HUGE. The memory model is defined as a
macro in the MAKEFILE and is supplied on the MAKE command line, i.e.:
MAKE -DMDL=s
to make a SMALL memory model version of CSAP (the "s" must be lower case
since it is a parameter to TCC and TCC is case sensitive on its
parameters). The resultant EXE file will be named CSAPx.EXE where 'x' is
C, S, M, or L depending upon the memory model selected. The default memory
model (if -DMDL is not specified on the MAKE command) is the COMPACT model.
The current MAKEFILE will NOT work properly for the TINY memory model, the
library specifications in the MAKEFILE would have to be modified to use the
SMALL libraries for the TINY model and the effort is probably not worth it.
The command:
TCC -mt -G csap sortdir isdevice getdpb
would have to be used to produce a TINY memory model version of CSAP and
would produce an EXE file with the name CSAP.EXE.
The EXE and OBJ files in the CSAPxxx ZIP have been produced for the COMPACT
model which is probably the most general.