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PC-SIG Diskette Library (Disk #163)
[PCjs Machine "ibm5170"]
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Information about “FILTERS”
DBSCREEN is a filter package that lets you create dBase II, III,
and III+ screens. Instead of entering row and number designations into
a format file, simply "paint" your fields on your display in a
full-screen edit mode. See exactly what your screen is going to look
like. DBSCREEN also lets you modify and print dBase II, III, and III+ s
formats. Other programs let you modify character strings, change tabs
into spaces, and encrypt/decrypt your files.
CRC.TXT
PC-SIG Disk No. #163, version v1
The following is a list of the file checksums which should be produced by
the CRCK4 program on disk #9 (and others). If the CRC numbers do not match
you may have a bad file. To use type: CRCK4 <filespec>
CRCK4 output for this disk:
CRCK ver 4.2B (MS DOS VERSION )
CTL-S pauses, CTL-C aborts
--> FILE: CRYPT .C CRC = C2 85
--> FILE: CRYPT .DOC CRC = 0F 03
--> FILE: CRYPT .EXE CRC = 2F D5
--> FILE: DETAB .C CRC = 4B 8F
--> FILE: DETAB .DOC CRC = 15 BF
--> FILE: DETAB .EXE CRC = C2 E1
--> FILE: ERR .C CRC = EE 9E
--> FILE: ERRS .C CRC = DB D3
--> FILE: ESCT .C CRC = 1F D7
--> FILE: FILP .C CRC = 29 A5
--> FILE: FILPS .C CRC = C9 5E
--> FILE: INDE .C CRC = E9 86
--> FILE: INDEX .C CRC = 39 93
--> FILE: LOCAL .H CRC = 95 63
--> FILE: SETS .C CRC = 2A 6D
--> FILE: SPSCN .C CRC = DC E8
--> FILE: SPSCN .DOC CRC = 5B 26
--> FILE: SPSCN .EXE CRC = 0E 40
--> FILE: TRANSLIT.C CRC = AB DD
--> FILE: TRANSLIT.DOC CRC = D0 AB
--> FILE: TRANSLIT.EXE CRC = EA EC
--> FILE: VERSION .C CRC = 99 B7
--> FILE: WC .C CRC = AB E5
--> FILE: WC .DOC CRC = 04 D3
--> FILE: WC .EXE CRC = 05 BF
--> FILE: XXX . CRC = 65 C8
--> FILE: DBS .PRT CRC = 50 DB
--> FILE: DBS .EXE CRC = 62 DF
---------------------> SUM OF CRCS = FD 32
DONE
These and other Public Domain and user-supported programs from:
PC Software Interest Group
1125 Stewart Ct Suite G
Sunnyvale, CA 94086
(408) 730-9291
CRYPT.DOC
CRYPT (Encryption / Decryption Filter)
Command
--------------------------------------------------
Purpose: This program will encode the text, read
from the standard input, and write it to
the standard output device.
Format: CRYPT key
Type: Internal External
***
Remarks: To decode an encrypted message, pass the
message through this filter again with
the same key as was used for encryption.
Example: A>CRYPT yohoho <crypt.doc >crypt.cod
Will produce a file containing the text
of this file, encoded so that it is illegible.
A>CRYPT yohoho <crypt.cod
Will then reproduce the text of this document,
and display it on the screen.
Note: 1. The encryption method here is based on
the XOR function, and while secure enough
to keep someone from freely reading
encoded files, it will probably not stop
a determined effort to decode the files.
2. Care should be taken to remember the key
since there is no way of reconstructing it
short of decrypting the file.
Written by Michael Hanson
DETAB.DOC
DETAB Filter
Command
--------------------------------------------------
Purpose: This filter reads text from the standard
input device, replaces all tab characters
with the corresponding number of spaces
and then writes it to the standard output
device.
Format: DETAB [n1 n2 n3 ... nx][/n]
Type: Internal External
***
Remarks: The default expansion is tab stops every
four characters, this may be overridden
in two ways using the optional parameters.
The n1 n2 ... nx parameters are a list of x
integers separated by spaces, that specify
the columns for the first x tab stops.
The /n parameter is an integer indicating
that tabs are to be set every n columns after
the current one.
Example: A>DETAB <detab.doc
Will output this document to the screen, with
each tab expanded to four characters. (It will
look diferent than if the file is TYPE'd since
type expands tabs to eight characters).
A>DETAB 2 4 6 /3 <fname.ext >fname.lst
Will expand the first three tabs on a line
to two spaces and the rest to three spaces
placing the file with expanded tabs in the
.lst file.
Notes: 1. The two methods of specifying tabs can
be used independently, or together as in
the second example, but the /n parameter
must follow any list of numbers (if only
a list of numbers is specified, the tabs
after the lists end will be every four
columns).
2. There are an almost unlimited number of
tab stops posible, but any tabs occuring
beyond the 100'th column will be expanded
to a single space.
3. Tab stops may be specified at every column
if desired, but each tab character will be
expanded into at least one space.
Written by Michael Hanson
FILES163.TXT
---------------------------------------------------------------------------
Disk No 163 Dscreen and Text Filters v1.1 DS2
---------------------------------------------------------------------------
CRYPT C Source code for CRYPT.EXE
CRYPT DOC CRYPT.EXE documentation
CRYPT EXE Encryption/decryption filter. Uses a key to encode files.
READ ME Documentation for DBS.EXE
DBS EXE Screen generator for dBASEII
DETAB C Source code for DETAB.EXE
DETAB DOC Documentation for DETAB.EXE
DETAB EXE Replaces tabs with appropriate number of spaces
ERR C Source for subroutine used here
ERRS C "
ESCT C "
FILP C "
FILPS C "
INDE C "
INDEX C "
LOCAL H "
SETS C "
SPSCN C Source code for SPSCN.EXE
SPSCN DOC Documentation for SPSCN.EXE
SPSCN EXE Removes spaces at the ends of lines in a text file
TRANSLIT C Source code for TRANSLIT.EXE
TRANSLIT DOC Documentation for TRANSLIT.EXE
TRANSLIT EXE Translates a character string into a different string
VERSION C Source for subroutine used here
WC C Source code for WC.EXE
WC DOC Documentation for WC.EXE
WC EXE Counts characters, words and lines in a text file
SPSCN.DOC
SPSCN (Space Scan)
Command
--------------------------------------------------
Purpose: This filter reads text from the standard
input and removes any blanks at the end
of each line, it then writes the text to
the standard output.
Format: SPSCN
Type: Internal External
***
Example: SPSCN <texfile.doc >outfil.doc
Will remove any extra blanks at the ends
of the lines in texfile.doc and place the
result in outfil.doc. Or,
DEBUG fnam.com | SPSCN >fnam.lst
( then press u and q)
where fnam.com is some executable file
that you wish to disassemble (see note
below).
Note: SPSCN is particularly useful for cleaning
up files produced by capturing the output
of another program, such as debug, which
adds several spaces to the end of a line
of disassembled code.
Written by Michael Hanson
TRANSLIT.DOC
TRANSLIT (Character Translation Filter)
Command
--------------------------------------------------
Purpose: This is a filter that reads a file from
the standard input device, translates
specified characters into others, and
writes the translated text to the
standard output device.
Format: TRANSLIT from to
Type: Internal External
***
Remarks: The parameters 'from' and 'to' are strings
of characters, a given character in 'from'
will be translated into the corresponding
character in the to string.
To specify a range of characters
to be converted you may type char-char
(see examples and note below).
To specify non-printing characters such
as <cr>,<lf> or <tab> one may use the
following escape sequences (the leading
\ tells translit that the following is
to be interpreted as a special character).
\f form feed
\b back space
\n line-feed
\t tab
\s space
\\ back slash character itself
\! exclamation mark
\r carriage return
\0 ASCII null
To specify that all characters not in
the given set of from characters are to
be translated to a given character,
precede the list of characters with an
exclamation mark (!)( see example below).
Examples: A>TRANSLIT a-z A-Z <translit.doc
Will display this file, with all the
lower case letters in it converted to
upper case.Or,
A>TRANSLIT \s\t\n \n <translit.doc
>transl.wrd
will produce a list of all the words in
this file, listed one per line, in the
file transl.wrd.
A>TRANSLIT !\n\r\sA-Za-z0-9 \s <translit.
doc >transl.npu
Will make the file transl.npu containing
this document with all the punctuation
marks removed.
Note: 1. When specifying ranges of characters
both characters must be upper-case
letters, lower-case letters or
digits. The first character must also
be the predecessor of the second, in
lexical order. Thus a-s, 2-5 or W-Y are
legal, but A-z , 9-1 and x-e are not
legal.
2. If the to string is shoreter than
the from string, then the excess
characters in from will all be translated
to the last character of to.
Written by Michael Hanson
WC.DOC
WC (Word Count)
Command
--------------------------------------------------
Purpose: This filter reads text from the standard
input device, counting the number of
characters, words and lines and writes
the totals to the standard output device.
Format: WC [-[L][W][C]]
Type: Internal External
***
Remarks: The -L parameter specifies that the line
count should be printed.
The -W parameter specifies that the word
count should be printed.
The -C parameter specifies that the
character count should be printed.
Specifying no parameter has the same
effect as specifying all of the
parameters. i.e. WC -lwc
Examples: A>WC <wc.doc -wc
Will output the number of words and
characters in this file.Or,
A>DIR C: | WC -l
Will output the number of files on drive
C: plus 7.
Notes: 1. When counting characters, WC ignores
the CR (carriage return) and the LF
(line feed) characters, so the count
may not agree with the file size in
the directory.
2. WC regards a word as any string of
characters separated from the rest
of the text by an end of line, space
or tab character.
Written by Michael Hanson
Directory of PC-SIG Library Disk #0163
Volume in drive A has no label
Directory of A:\
CRC TXT 1875 11-14-84 2:42p
CRCK4 COM 1536 10-21-82 7:54p
CRYPT C 640 8-22-83 12:40a
CRYPT DOC 1536 8-23-83 1:28a
CRYPT EXE 5632 8-22-83 12:40a
DBS EXE 39936 7-13-86 2:39p
DETAB C 2176 8-22-83 2:03a
DETAB DOC 2304 8-22-83 12:10a
DETAB EXE 6656 9-15-83 12:48a
ERR C 256 8-22-83 1:58a
ERRS C 256 8-22-83 12:35a
ESCT C 512 8-22-83 2:00a
FILES163 TXT 1334 1-04-80 12:16a
FILP C 768 8-22-83 2:01a
FILPS C 512 8-22-83 1:59a
INDE C 640 6-13-83 12:35a
INDEX C 384 8-22-83 2:01a
LOCAL H 384 8-22-83 1:48a
READ ME 1024 7-13-86 2:43p
SETS C 1664 6-13-83 12:35a
SPSCN C 1280 8-22-83 2:06a
SPSCN DOC 1280 8-22-83 12:06a
SPSCN EXE 6144 9-15-83 12:44a
TRANSLIT C 1536 8-22-83 2:05a
TRANSLIT DOC 3456 8-22-83 12:19a
TRANSLIT EXE 7168 9-15-83 12:33a
VERSION C 384 8-22-83 1:57a
WC C 1664 8-22-83 2:03a
WC DOC 1920 8-22-83 12:08a
WC EXE 10240 8-22-83 12:05a
30 file(s) 105097 bytes
50688 bytes free