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- --- ---
- Sift 5.0 19940312 (o) (o)
- ^
- by Stephen D Childers \_____/
-
- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- *** WARNING !!! *** *** WARNING !!! ***
-
- This program can damage [ouch] important files if not used properly.
- Do not use this program on original files unless you know exactly
- what you are doing.
-
- This is the warning that should have been given with previous
- releases of this program.
-
- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- Program Description:
-
- 1) This program will sift out user defined byte values from a file.
-
- The range of byte values that may be sifted out of a file
- is the normal values that a byte may represent ( 0 through
- 255 decimal ).
-
- 2) Can run only from CLI. Can be made resident.
-
- 3) Program (when run from CLI) will interact with the 'c:Why' command
- after program failures; this command may provide a more detailed
- explanation of why the program failed.
-
- The 'Why' command should be used immediately after a program
- failure to extract the last program's result code, because
- that result code is changed upon the execution of the next CLI
- command.
-
- 4) Certain error reports will contain the name of the argument, file,
- device, (etc) that is associated with failure when it occurs.
-
- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- CLI Usage:
-
- Usage > Sift [!] [[-options] input [output] filter]
-
- ! = show author info
-
- options: q = Quiet; do not print messages
- o = Overwrite input, [output] not needed
-
- input = file to be sifted
- output = file to receive sifted data
- filter = This is a text file which informs Sift which byte
- values to sift while reading the inputfile.
-
- CLI Usage notes:
-
- 1) Input arg must be a file and can not be a device or directory, and
- output arg can now designate a device and/or directory as the
- destination for sifted data. If output arg is not a file then
- input file name will be taken and used for the output file name.
-
- ie > Sift noisycapture.txt df0: filter2.txt
- or > Sift noisycapture.txt df0:stuff/ filter2.txt
-
- 2) If the output arg is not given (and option -o is not selected) then
- the input arg (file name) will be used in creating the output file
- name, and that name will have the extension ".SFT" appended to it.
- Output will be put in the same directory as the input file.
-
- 3) If the output arg is a device or directory name then the output of
- the sifted input file is sent to the given directory.
-
- 4) Option -o does not require the output file arg, and program will
- ignore output arg if option -o is given.
-
- 5) Option -o requires loading all of the input file into memory, and
- if there is not enough memory the program will inform you to try
- again without option -o.
-
- 6) Option -o will not overwrite input file unless the bytes sifted is
- greater than zero.
-
- 7) The <-options> arg can appear any where within the command line
- template, thereby allowing this program to be used with various
- "S:SPAT" like script files, thus allowing the use of wild
- characters.
-
- ie > Execute SPAT Sift *.txt -o filter1.txt
- or > Execute SPAT Sift #?.txt -o filter1.txt
- or > Execute SPAT Sift #?.txt df1: filter1.txt
- or > Execute SPAT Sift #?.txt df1:texts/ filter1.txt
-
- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- How to create a filterfile:
-
- 1) First line of filterfile must have the word "Sift.filter" on it
- or Sift complains.
-
- 2) This text file can be created and modified by the user using any
- editor program. The values that you put into this file will tell
- Sift which character codes to ignore when reading your inputfile
- and making your outputfile.
-
- 3) The filter text file may contain user notes, and any notes that
- you write within your own filter files must be preceded with
- semi-colons ";" or else the Sift program may not filter properly
- after reading your filter file into memory.
-
- 4) The filter text file character values may be writen as hex or
- decimal. Hex values must have an 'h' attached to the front of it.
-
- 5) One character or a range of characters may be indicated.
-
- 6) Putting a dash between values indicates a range of characters to
- sift.
-
- 7) A comma must be inserted between each character or between each
- range of characters, and the values at the end of any line do not
- need anything after them.
-
- 8) See the files "filter.txt" and "filter.ed" for examples of how to
- write your own filter files.
-
- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- Version History:
-
- The following information briefly describes changes or improvements
- made to each version, and they will be described in descending order;
- meaning latest version information begins first:
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
- Version 5.0 (19940312) -
- 1) Changed version numbering format. Program can now be used with the
- "Version" command. Date within parenthesis is shown in a somewhat
- international format as (yyyymmdd).
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
- Version 19930803 -
- 1) Optimized and refined source code thereby making program smaller.
- 2) Added "*** WARNING !!! ***" paragraph to document file.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
- Version 19920108 -
- 1) Removed a CLI parsing problem.
- 2) Can be made resident.
- 3) Added option -o.
- 4) The <-options> arg can now appear any where within the command
- line template, thereby allowing this program to be used with
- various "S:SPAT" like script files, thus allowing the use of wild
- characters.
- 5) Input arg must be a file, and output arg can now designate a path.
- and/or directory as the destination for sifted data.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
- Version 19910917 -
- 1) This version should be a wee bit faster than previous version.
- 2) Usage template has changed.
- 3) First line of filterfile must have the word "Sift.filter" on it
- or Sift complains.
- 4) Improved error reports.
- 5) Program (when run from CLI) will now interact with the 'c:Why'
- command after program failures.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
- Version 19910712 - The first version.
-
- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- /\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\
- /\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\
- /\/ \/\
- /\/ 6 Better is the poor that walketh in his uprightness, \/\
- \/\ than he that is perverse in his ways, though he be rich. /\/
- /\/ \/\
- \/\ The King James Holy Bible - Proverbs 28:6 /\/
- \/\ /\/
- \/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/
- \/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/
-
- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- End Of Document
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