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Text File | 1994-08-15 | 43KB | 1,005 lines

ZIP'R Professional For DOS Revision History 08-16-94 ■ Version 2.03 . Fixed a major problem when using internal ZIP compression. When attempting to recompress a program using the Update option, users would receive an Error Number 5, (File Access Denied). The compressed file had been marked as read-only, and therefore could not be initialized for any other action. This error condition did not appear when using a Novell network, so internal beta-testing efforts did not catch the problem. Added code to make sure the compressed file's attributes were properly set before any action to the file is attempted. . Updated the version number code in the registration procedure. . Fixed several Clear-Screen problems by replacing the built-in Clear-Screen command with a custom routine that resets the Window to 1,1, 80,25. 07-18-94 ■ Version 2.02 . Enhanced ZIP'R Pro's ability to handle "overwrite" error messages generated by PKUNZIP.EXE or ARJ.EXE. When either of these programs detects a file on the hard drive that already exists in the compressed file, they will issue an overwrite message, prompting the user whether or not the file should be replaced with the one located in the compressed file. Each of these programs will then generate an exit code, which normally causes ZIP'R Pro to cease the program execution and terminate. Since these errors are non-fatal errors, ZIP'R Pro now offers users the choice of whether to continue with normal program execution or not. Why is this necessary? The most common need for this feature is when programs such as Central Point Anti-Virus or Microsoft Anti-Virus place "CHKLIST.CPS" or "CHKLIST.MS" files in each directory when a virus scan is executed on a user's computer. The first time this happens, the compressor (PKZIP, for example) adds the left-over virus file into the archive. The next time a virus scan is executed, PKUNZIP detects that a file by the same name exists in the program directory, generates an exit code, and thus causes ZIP'R Pro to terminate execution. (This could prove to be frustrating, since a file by this name is placed in EVERY scanned directory.) ZIP'R Pro will now detect if an overwrite message occurs, and will display a message box, allowing the user the option of whether to continue with the normal program execution or not. . Fixed a problem where ZIP'R Pro was not trapping and reporting errors that occurred during the decompression process. Instead, ZIP'R Pro would simply error out, and terminate program execution. (This bug was introduced in version 2.00.) 07-11-94 ■ Version 2.01 . Version 2.01 of ZIP'R Pro contains an updated INSTALL.EXE file. One of our users reported that InocuLAN (by Cheyenne Software) was reporting an occurrence of the Tony-H virus in the INSTALL.EXE file. We believe this was a false-positive report, and not cause for alarm. However, we are releasing ZIP'R Pro 2.01 with the INSTALL.EXE file in uncompressed format. Also, the file BONUS.DOC has been removed. 06-29-94 ■ Version 2.00 . Added support for a user-specified compression mode. Valid values are BestMethod, Deflate, Implode, Shrink, and Store. . Added support for a user-specified deflate level when using internal ZIP compression. . Added support for user-specified implode values when using internal ZIP compression. . Converted the ClrScr w/Error Message calls to use the HandleError procedure. . Changed the ProcessErrorCode procedure to a function. . Modified the HandleError procedure to allow it to process error codes that must be passed to the ShowErrorMessage procedure. . Changed the DeletedFiles variable in the COMP unit from a literal string to a boolean. . Changed the MatchingFileFound variable in the COMP unit from a literal string to a boolean. . Added code to only display the gauge window when necessary and resize the compression window depending on whether the gauge window is displayed or not. . Changed gauge window display to be indented rather than out- dented. . Added a fail-safe check to the DeleteAllFilesExcept routine to make sure that the current directory is not the root directory of a hard drive. . Added a fail-safe check to make sure that the Accurate File Size Calculation displays Level 4 on the prelog screen when Internal ZIP is being used. (With Internal ZIP, all calculations are 100% accurate.) . Changed the directory existence checks to use a procedure from a commercial library, instead of our own STSI library. Our procedure was not handling root directories properly. . Added code to read the current entry when decompressing a .ZIP file with the Internal ZIP code. New code makes sure that any imbedded directories are created if they do not exist. Any directory entries contained without files are discarded. This allows more complete compatibility with PKWare's PKZIP. Previous code would cause a decompression error to occur. . Moved all of the DrawHeader and DrawCompressionScreen calls inside of the ZPExec routine, where possible. This fixed a problem where incorrect messages were sometimes displayed during the compression or decompression processes. . Fixed several issues relating to the display of the decompression query box that pops up when a duplicate file exists on the hard drive. Widened the available display for the filename and potential directory entry, and added fail-safe code to truncate these on the left side if they get too long. . Modified the remaining routines in the COMP, DECOMP, and EXECUTE units to use the HandleError procedure. . Created a common procedure in the COMP unit to contain the compression signal file related detection and creation code. 06-20-94 ■ Version 1.28 (Internal BETA Version - Not Released!) . Fixed a problem where the screen was not being cleared after windowed decompression. Added a reset of the screen and color output. . Modified shadows on compression and decompression screens to be completely black. . Added a command to reset the Window coordinates before attempting to write the file count or twirling bars display to the screen. After adding several window-relative routines, both displays were being written to a relative window, instead of the absolute screen coordinates. . Fixed a problem where the title and copyright notice on the Query screen started "disappearing" after other Internal ZIP windowing routines had been implemented. Used window- relative screen writing instead of absolute screen writing. . Created a textured background screen for the Internal ZIP compression and decompression windows. . Added a "Moving files. Please wait!" header to the display screen when files are being deleted after the compression process. . Added a call to the UpdateGaugeWindow procedure during the file deletion process to provide a visual progress indicator. . Altered the DeleteAllFilesExcept procedure to use a direct directory search to delete files, instead of a FileMaskList generated from the original archive file. This allows the procedure to work in all situations. . Changed the name of the stDeleteFilesIntZIP procedure to DeleteAllFilesExcept. . Created a header window to be used for displaying status messages during the compression / decompression processes. This replaces old code which simple used absolute screen writing. . Added a bar graph and compression/decompression window to be used when Internal ZIP is used as the compression type for a program. The bar graph is updated depending on the current file vs. the total files to be compressed or the total files located inside the ZIP file. . Created a common HandleError procedure in the Errors unit to centralize the compression/decompression error handling. . Created a common LaunchExternalDecompressor procedure in the Decomp unit, reducing final .EXE code size by about 2K. . Worked around a problem where an empty sub-directory would cause an error #2 during the compression process (File Not Found). . Set up a file counter to keep track of the total number of files that will be compressed into the internal ZIP generated file. . Enabled sub-directory creation during internal ZIP decompression. . Added code to recurse sub-directories during the internal ZIP compression process. . Made sure that the compression and decompression signal files are erased if an error occurs during internal ZIP compression or decompression. . Added code to call the Done routine if an error occurs during the internal ZIP compression / decompression processes. . Created a routine to calculate the exact disk space needed for extracting a ZIP file when using the internal ZIP compression / decompression routines. . Added preliminary support for internal PKZIP 2.0 compatible compression and decompression. 06-10-94 ■ Version 1.27 . No coding changes. 05-26-94 ■ Version 1.26 . Changed the AddBackSlash procedure to stAddBackSlash when generating the ZIPRProPath. stAddBackSlash adds a backslash when the last character in the path is a colon. . Modified the behavior of the prelog screen display to prevent the screen from being displayed if the PrelogDelay was set to 0. . Fixed a problem where the prelog screen was being displayed when the PrelogType was set to NONE. . Changed all "Halt" statements to "stHalt(?)", where ? is the ERRORLEVEL. . Changed an error message in the DECOMP unit to use an stTVMessageBox. 04-22-94 ■ Version 1.25 . No modifications. (See ZIFPRO.REV for modifications to the ZIF Editor Pro. 03-26-94 ■ Version 1.24 . Removed all /CLEANUP option code from ZIPRPRO. This option is now available from the ZIF Editor. A code size reduction of about 11K was achieved. . Modified code so that ZIP'R Pro does not execute the program when the /TEST parameter is being used. It simply displays the parameters and exits. . Changed the "TEST" parameter to "/TEST". . Fixed a problem where the compression signal file was not being deleted if an error occured while attempting to test the archive integrity. . Fixed a problem where an error message was not being issued if a compression or decompression signal file was detected. ZIPRPRO would simply exit, with no warning. . Created enumerated types for PrelogType and RegisteredVersion, replacing the literal strings used previously. . Re-worked the INI and ZIF test display procedures to use string arrays. This change reduced the code size slightly, and substantially reduced the complexity of these procedures. . Converted the ScanActivityIndicator string variable to an enumerated type. Corrected a problem where a mis-spelling of a literal string could have caused the Twirling Bars to fail to work. . Added a common function to search for ARJ, LHA, PKZIP, and PKUNZIP in their respective paths, the ZIP'R Pro path, and the DOS PATH before calling any of these programs. The common function reduced the code size by .5K. . Modified code to check for the existence of a backslash at the end of the ARJ, LHA, and ZIP paths after they are read from the .INI file. If a trailing backslash is not detected, one is added. 03-10-94 ■ Version 1.23 . Modified an error message about the program parent directory not being present to be more accurate by stating that either the program parent directory or the main program directory is not present. . Converted the FloppyFormat variable to an enumerated type within the code for easier variable-checking. . Added a ZPExec procedure that contains all compression and decompression related Exec functions. (Code size reduction of 6.5K.) . Moved several boolean variables into the INI and ZIF records, to make the code more concise. . Changed the default value for SubdirectoryDeletion to True. . Changed If..Else If statments in Errors unit to a Case statement to make the code shorter and more concise. . Moved all common string literal declarations into a new ZPSTRING unit. . Increased the estimated string array size for Exclude, Extract, IN, OUT, TSRPre, and TSRPost commands. . Converted CompressionType literal strings to an enumerated type. . Changed all error message strings that were passed as variables to a global routine into an enumerated type. This allows automatic compiler validation, and shortened the code by over 10K. 03-03-94 ■ Version 1.22 . Added 3D effects to query and error screen dialog boxes. . Added an IOResult check and corresponding error message if the ProgramParent directory can not be successfully created on a RAM Disk. . Circumvented a potential problem in the compression and decompression routines where a default value for the Compression and Decompression Swap parameters was not being set. The compression procedure would issue an error message under this circumstance. Altered the code to provide a fail-safe parameter assignment. . Corrected a problem in the ARJ Decompression procedure where the "Default" Decompression Swap parameter was not being read. . Added code to convert the ZIPRPROPath to upper case. . Removed several "EraseDecompressionSignalFile" statements from the beginning of the DecompressZipFile procedure. This file had not yet been created at this point in the procedure. . Corrected a problem where the update option was not working properly. (Broken in 1.22, not released.) . Fixed a problem where a runtime error 202 would occur if the file PKUNZIP.EXE could not be found. The runtime error would be issued prior to displaying the error message from ZIPRPRO. (Increased stack.) . Added automatic ProgramParent directory creation if extracting to a RAM disk. . Added preliminary support for extraction to a RAM disk. . Corrected a problem where an error message would be issued if the "Program" directory did not exist. This created a problem if a "Program Parent" directory was specified, since the program directory might not exist under this circumstance. . Corrected a problem where the .N?? file was not being deleted if errors were detected when checking the validity of the values in the .INI and .ZIF files. . Shortened several code segments by using better coding techniques. . Corrected a potential problem where the .SXT signal file could be mistakenly deleted by ZIPRPRO. . Combined the Done and DoneNoSXTDelete routines into a common procedure. Added an enumerated type variable to pass to this procedure, informing it of any restrictions to observe. 02-26-94 ■ Version 1.21 . Corrected minor spacing / carriage return problems on dialog box (Query) screens. . Corrected a potential problem where the /CLEANUP option would delete files in the current directory, not the ZIPRPRO sub-directory, if launched from a directory other than the ZIPRPRO sub-directory. . Corrected a problem where a runtime error 2 would occur in the CreateSubDirectoriesUnderOS2 procedure, because an Else statement was omitted. . Streamlined the code by creating two erase file routines to replace the separate erase routines used previously. 02-16-94 ■ Version 1.20 . Fixed a major problem where the original .ZIP file could be deleted if the executable file could not be found and update option was enabled. (Data loss could occur in this situation, especially if Selective Extraction or Selective Exclusion was enabled.) . Added support to erase the *.DFL, *.NFL, *.OFL, and *.DIR files when using the /Cleanup option. . Added support to manually create subdirectories when operating under OS/2. This option will circumvent a potential problem where PKUNZIP cannot create sub- directories under OS/2. (This problem has been reported to PKWare.) . Updated IFDEF and IFNDEF statements throughout the code to minimize code size for each module. . Moved several string pointer variables into the INI and ZIF record variables. . Reduced the ARJ and LHA default memory requirements to more realistic levels. . Re-compiled with updated libraries. . Corrected a problem in the stTV3ChoiceBox procedure that caused the box to be too narrow to properly center a long header. . Added support to display the Command Processor and ZIP'R Pro Path information in the new style message boxes. . Corrected a problem where the TestFlag boolean was not being set early enough in the code to display the INI Parameters screen. (%2 = TEST) . Added support to display the .INI Parameters in the new style message boxes. . Added all missing .ZPD Parameters to the ZPD Parameter display procedure. Added code to display the first 10 INCommands, OUTCommands, ExcludeFiles, ExtractFiles, TSRPreProgramCommands, and TSRPostProgramCommands. . Added support to read old style .ZPD files, prior to current version. (Set internal flags if the new UseINCommands, UseOUTCommands, UseTSRPreCommands, and UseTSRPostCommands variables could not be found in the .ZPD file.) . Added support to display the .ZPD Parameters in the new style message boxes. . Fixed a problem in the stTV3ChoiceBox procedure, that caused a system hang if the maximum number of lines exceeded the pre-defined limit. . Added support to read UseINCommands, UseOUTCommands, UseTSRPreCommands, and UseTSRPostCommands variables from the .ZPD file. 01-30-94 ■ Version 1.19a (Internal Release) . Corrected a problem where the swap file name was not being passed to the swapping exec procedure. (This problem was introduced, in version 1.20, when the common exec swapping functions were created.) . Added support to specify whether EMS memory is to be used over XMS memory for the swapping exec procedure. The default behavior is to use EMS first, but may be overridden. . Added support to swap to XMS memory during program execution, if available. Previously, only EMS or disk was used for the swap file. . Modified the swapping-related procedure calls to force a swap (default) as a fail-safe procedure. . Modified the WindowedCompression and WindowedDecompression procedure calls to automatically force windowed mode (default) as a fail-safe procedure. . Converted all execute calls to use the new procedures. . Removed the STSI2 unit from the uses clause to prevent unnecessary compilation. . Corrected a problem where the swap file (.SWF extension) was not being erased when the /Cleanup option was specified. (This file has the system attribute set.) . Created common execution functions to reduce code size and complexity. . Corrected a potential problem where the compressed file could have been deleted, if an incorrect value for CompressionSwap or DecompressionSwap was read from the .INI file. . Converted the internal SortedExtraction variable to a Boolean type. . Corrected a problem where the .INI file was not being read prior to checking the cleanup password. . Changed the behavior of the cleanup password procedure to not prompt for a password if the password is blank. . Converted internal WindowedCompression and WindowedDecompression variables to Boolean types. . Reduced the memory requirement default values for PKZIP and PKUNZIP. (New default swapping option will be added to the ZIF Editor.) . Re-worked the .INI and .ZIF read routines to make the code faster and more concise. . Added support for the new INIVersion, ZIFVersion, UseDiskForExecSwap, UseEMSForExecSwap, and UseXMSForExecSwap parameters. . Re-arranged the order and placement of passed parameter related code, to allow the disposal of unnecessary pointer variables. . Modified dialog box code to allow centering or left justification. . Changed all error messages to be displayed using the new style dialog boxes. . Converted all query screens to the new style. Corrected various punctuation problems in the text of the new screens. . Modified cleanup password field to automatically convert characters entered to upper case. . Corrected a problem in the swapping Exec routines where the executed program would hang. (This problem was caused by the mouse handler routines not being disabled before performing the swap, and was introduced in version 1.20.) . Added password protection for the /Cleanup option. . Updated prelog screen to show the amount of Heap memory available. 01-20-94 ■ Version 1.19 . Added additional error messages for new error checking procedures, and corrected a typo in a separate error message. . Enhanced the conventional memory available routine to provide a more accurate estimate of the amount of conventional memory available on the system. (This figure approximates the free memory reported by MEM.) . Corrected a problem where the logic controlling the loading of a command processor was backwards when executing a .BAT or .BTM file . Added a check to force a command processor to be loaded if the program to be executed contains a .BAT or .BTM extension. . Added support to execute the desired program without loading a command processor first. This increases the memory available to the program by about 3-5K. . Removed unnecessary "Continue" statements from the INI and ZIF file read routines. . Converted internal string pointer variables to use INI and ZIF records. . Added support in the TSR Container file section to use the AlternateEXELaunchDirectory feature. . Fixed a problem where the "CALL" statement was not being placed in front of the program name in the TSR Container file if the Parameters field was blank. . Corrected a potential problem where the current drive and directory was not being set prior to executing OUT commands. This could have been a problem if the current drive and/or directory was changed during program execution, such as when shelling to DOS. . Added support for an alternate EXE launch directory to make it possible to launch a program from a directory other than the one in which the executable file resides. (The program does NOT have to be an EXE file.) This feature allows programs, such as Microsoft Works, Borland Pascal, and others, to be executed from a data subdirectory. . Added preliminary support for string encryption and decryption. 01-06-94 ■ Version 1.18 . Improved the Conventional memory estimate on the prelog screen to more accurately reflect the amount of memory available after swapping. . Updated the BIOS screens to match the direct-write screens. . Added support for AUTO, DIRECT, and BIOS screen write modes. This should help to solve any screen-related compatibility problems that might exist. . Added video mode detection when using the AUTO screen writes option. . Updated the prelog screen to display the status of the Use Atomic Lock Files option. . Updated the prelog screen to display the Selective Extraction (SXT) and Selective Exclusion (SXC) entries separately. (If either option is disabled, the corresponding entry count will be 0.) . Updated the prelog screen to display the status of the new Subdirectory Deletion option. . Added support to NOT delete sub-directories when using PKZIP v2.04g. This switch is necessary when an OS/2 system is operating on a network in combination with other systems. Due to some sort of conflict, sub- directories can not be re-created under OS/2. (Unsure whether this is an OS/2, NetWare Requester, or PKZIP caused problem.) This switch can only be used with PKZIP v2.04g. . Added preliminary support for compression program version number tracking. Future versions of ZIP'R Professional may support compression program features that might not be available in previous versions of the compression program. . Corrected an alignment problem on the FileCount indicator. . Added a FileCount / Twirling Bar indicator to the AFSC Level 4 screen to display the progress of the file size scanning. (Due to the high scanning speed, this feature will be useful only on compressed files with an extremely high number of files.) 01-01-94 ■ Version 1.17 . Corrected a problem where .SXT signal files were not being deleted when the /CLEANUP switch was used. . Corrected a possible ambiguity in the ExecDOS error messages. (#-5 changed to # -5.) . Updated the AFSC routines to use integer division, which eliminates the extra rounding step needed for reals. . Corrected a problem in the AFSC Level 4 (ZIP) calculation procedure that would cause erroneous calculations. (The file size returned would always be 0.) 12-27-93 ■ Version 1.16 . Fixed a problem where an extra hyphen was being prepended to the compression command line. . Added CompressionOptions support to the ARJ and LHA compression procedures. (LHA does not currently support this feature.) . Fixed a problem where the CompressionOptions field in the .ZPD file was not being passed to PKZIP. . Fixed a minor problem where ".ZIP" was hard-coded onto the Query For Compression screen. If ARJ or LHA was being used, the screen would still say that the resulting compressed file would have a .ZIP extension. . Added an additional check for PKZIP.EXE before decompressing a .ZIP file when using Selective Extraction or Selective Exclusion. This is important, because when these options are enabled, the program MUST be re-compressed to preserve all data files. . Fixed a potential problem where the existence of PKZIP.EXE was not being verified before deleting files from the original .ZIP file. . Fixed a potential problem where ZIP'R Professional was not verifying the existence of PKUNZIP.EXE and PKZIP.EXE before attempting to create the temporary file lists. . Added an additional check to attempt to locate the selected compressor on the DOS PATH. ZIP'R Professional will use the path specified in the ZIPRPRO.INI file if the program exists. If the program cannot be found, the ZIPRPRO directory is searched. If this search fails, the DOS PATH is searched. 12-25-93 ■ Version 1.15 . Cleaned up some internal routines related to cleaning up signal files before exiting ZIP'R Professional. . Changed the .ZPD and .INI file read routines to reduce overhead and increase speed. 12-22-93 ■ Version 1.14 . Added error reporting to the error trapping sections of the IN Command, Program, and OUT Command routines. If an error is detected in any of these routines, ZIP'R Pro will report the error and query the user whether to continue. The error reporting routines will also report whether the error was generated by the command processor (Error Code) or by the IN Command, OUT Command, or Program (Exit Code). . Corrected a problem in the Accurate File Size Calculation routines where the selective extraction and exclusion entries were still being used, even if the file was being decompressed from a floppy disk. . Fixed a major problem where data loss could occur if the compressed file was stored on a floppy diskette, and selective extraction or selective exclusion was enabled. This is a rather rare combination of options, but since data loss is likely, it is prudent to upgrade previous versions of ZIP'R Professional For DOS. . Corrected a problem where the cursor would disappear following some query screens. . Added /CLEANUP option to erase all signal files from the ZIPRPRO sub-directory. This option should be used with care to ensure that no other processes are using ZIP'R Professional. 12-20-93 ■ Version 1.13 . Corrected a problem where a program that is executed using a batch file, that also used a TSR container file would not return control to ZIP'R Professional for re-compression. The solution was to "CALL" the batch file from the TSR container file. . Corrected a problem where the Decompression Signal File might not get deleted under some error situations. . Completed the transfer of code to common units to allow code sharing between different components of the ZIP'R Professional series of programs. . Added conditional defines to allow code sharing between ZIP'R Professional For DOS and the ZProcessor component of ZIP'R Professional For Windows. . Isolated a problem creating sub-directories under OS/2 to the use of "Global" network sessions. The Novell OS/2 requestor handles directory creation differently under global or private network sessions. ZIP'R Pro should be used in a private session if sub-directories must be re-created. . Checked into a potential problem with AFSC Level 4 if the lines were too long, and wrapped on the screen. The function used to handle the string to long integer conversion correctly handles this situation, and ignores any strings that it can't convert. No action necessary. 12-05-93 ■ Version 1.12 . Added error checking to make sure that compression cannot occur to floppy drives unless the compression program being used is PKZIP. (Other compression programs do not currently support spanning floppies.) . Changed the way ZIP'R Professional deals with the attributes of a compressed file that resides on a floppy diskette. The attributes of these files will not be changed, since we do not know which diskette is in the drive, and multiple diskettes may be required to store the compressed file. . Fixed a problem with floppy compression where the query for compression floppy diskette was occurring too late. This caused programs to be compressed to floppy diskettes properly, but they could not be decompressed. (After further checking, the programs could be decompressed, but the prompt for the decompression floppy disk was in the wrong position. A work-around was to simply make sure that the disk was in the drive.) . Added Compress/Decompress and TSR Entries indicators to prelog screen. Separated Net/Multi to be two separate indicators, and added code to detect them individually. . Added a program halt command following the error message display if the ZIPRPRO.INI file cannot be found. . Corrected a problem where the .ZIP file was not being deleted if Update mode and Compress/Decompress only mode were enabled. . Added code to force a total decompression if "Compress/Decompress Only" is enabled. This will prevent problems if all files are not extracted. . Corrected a problem where the .DSF file was not being deleted under various circumstances in the decompression module. . Corrected a potential problem where logging to a non-existent program or program parent directory was not calling the "Done" procedure. . Removed unnecessary ZipName pointer variable, and replaced with CompressedFileName pointer variable. . Corrected a problem where the .DSF (Decompression Signal File) was not being deleted if an error occurred during the CheckSpaceForDecompression procedure. (This problem could manifest itself if the compressed file was corrupt.) 11-26-93 ■ Version 1.11 . Added error message if Selective Exclusion is enabled, but no file specifications have been entered. . Corrected problems where three delete routines were not marking the compressed file with normal attributes, generating a run-time error. (Code 5, File Access Denied) This error would occur when query mode was enabled, and the program was not re-compressed. . Updated random filename generator code in the DECOMP procedure to use the new method for generating random filename prefixes. . Added "Selective Exclusion" feature to complement Selective Extraction. Selective Exclusion allows certain files or groups of files to be excluded from extraction. . Changed the prelog screen to display the number of Selective Extraction files (entries) and the number of simultaneous ZIPRPRO licenses. 11-21-93 ■ Version 1.10 . Changed the logic in the prelog screen to highlight Query Option if Selective Extraction is enabled, but the compression type is not ZIP. . Changed the countdown code on the prelog screen to count to 0. . Added code to mark the compressed file as ReadOnly during ZIPRPRO operations. This should help to reduce the chances of accidently deleting the original compressed file during update mode (inconvenience) or during selective extraction (potential disaster). . Added code to mark all signal and temporary files ReadOnly, to prevent other processes from erasing them. Also added code to mark files as normal before attempting to delete them. . Corrected a problem where the atomic lock files were not being closed properly after creation. . Re-worked the token and temporary file creation and detection routines to use variable names and file extensions that fit their function. . Moved the code to generate a random filename prefix to a separate, common procedure, reducing the complexity of the routines that require these names. . Added error message codes to trap the condition if more than one users attempts to access a compressed file when Selective Extraction is turned on. . Fixed a problem where the .TK1 file was being created on programs that did not need to be decompressed, and the .TK1 file was not being deleted. . Moved .TK1 and .TK2 file detection and creation to a common area of the DecompressZipFile procedure. . Changed the signal file checking order to accomodate the new Selective Extraction .SXT file. . Fixed a problem where the Selective Extraction .SXT signal file was being created in error. (A non-atomic file was being created.) . Added code to limit access to the compressed file if selective extraction is being used by any user. . Added error message code to trap the condition if Selective Extraction is turned on, but no files are entered for extraction. . Corrected a problem where the procedure to calculate the space required to decompress the compressed file was being executed when the compression type was NONE, and no compressed file existed. . Checked out a potential problem with PKUNZIP erroring out if files specified for extraction did not exist. It turns out that PKUNZIP simply ignores this type of error, eliminating the need to deal with it in ZIPRPRO. . Added code to disable Query mode if using Selective Extraction. (This is necessary to insure the integrity of the original compressed file, and to prevent errors when attempting to decompress files a second time.) . Corrected problems in the CheckSpaceForDecompression procedure where an EXIT was being executed before the selective extraction container file was generated. . Revised the code in the CalculateExactFileSize routine to base its calculations on the list of files to be extracted, if Selective Extraction is enabled. . Added the more rigid compressed file type checking to the internal CalculateExactFileSize, DecompressZipFile, and CheckSpaceForDecompression procedures. . Eliminated the automatic detection of compressed file archive types. Now, the type of compressed file must match the compression type specified in the .ZPD file. (If users wish to change compression types, they must use a compression type of "NONE" for one pass. Then, the file may be re-compressed with the new compressor.) . Added fail-safe code to the prelog screen procedure that will show grayed-out check marks if any options have been disabled by ZIP'R Professional. . Updated prelog screen to show the status of the new "Selective Extraction" option. . Added support for "Selective Extraction" when using PKZIP/PKUNZIP. 11-15-93 ■ Version 1.00 . Initial release of ZIP'R Professional For DOS.