Very Computer

--------------------------------------------------------------
(1) remove all non-printing characters (character codes 1 through 31,
   and 127) and replace them with the same sort of codes the vi
   editor uses.  For example, the bell character (character code 7)
   is replaced by the two printable characters "^" and "G" (G is the seventh
   letter of the alphabet).  Appendix I of Foster lists the ASCII character
   set, and it shows all the proper two-character sequences that should
   be used for the non-printing characters.  There are two special cases:
   Replace the delete character by "^?".  Newlines should be replaced by a
   dollar sign ("$") and then an actual newline.
   **you may ignore NUL (character code 0)**

(2) delete all non-ASCII characters (those with character codes 128 through
255).

(3) truncate all output lines that would otherwise extend past column 72.
Begin
   reading the data on the next line after ignoring the rest of the
character past column 72.

Make sure it reads from stdin and prints to stdout.  It should be comprised
of standard UNIX utilities (that is, it should not invoke any specialized C
programs
that you may consider writing). You MUST make use of pipes rather than using
files to store intermediate results.  Don't make this assignment
unnecessarily hard: the whole program can be done in ONE line (not counting
all the documentation lines).
--------------------------------------------------------------

I was thinking that (1) could be accomplished by using a tr line like ( tr
'\001-\011' '\136') but that replaces some of the non printing with the ^,
how would i get the letter in there and would I have to have a bunch of
those tr commands piped together just to accomplish (1)?

Some help on this would really really be appreciated as its due on Monday
and I've hit a brick wall on this one.

-mogrefy

mixed with a little tr or sed to remove 'ASCII' chars.

add a bit of fold to truncate at 72 chars

PS My newsreader yaks on the fact that you managed to crosspost to nonexistant
groups.

 Here is the assignmnet...

Quote:

> --------------------------------------------------------------
> (1) remove all non-printing characters (character codes 1 through 31,
>    and 127) and replace them with the same sort of codes the vi
>    editor uses.  For example, the bell character (character code 7)
>    is replaced by the two printable characters "^" and "G" (G is the seventh
>    letter of the alphabet).  Appendix I of Foster lists the ASCII character
>    set, and it shows all the proper two-character sequences that should
>    be used for the non-printing characters.  There are two special cases:
>    Replace the delete character by "^?".  Newlines should be replaced by a
>    dollar sign ("$") and then an actual newline.
>    **you may ignore NUL (character code 0)**

> (2) delete all non-ASCII characters (those with character codes 128 through
> 255).

> (3) truncate all output lines that would otherwise extend past column 72.
> Begin
>    reading the data on the next line after ignoring the rest of the
> character past column 72.

> Make sure it reads from stdin and prints to stdout.  It should be comprised
> of standard UNIX utilities (that is, it should not invoke any specialized C
> programs
> that you may consider writing). You MUST make use of pipes rather than using
> files to store intermediate results.  Don't make this assignment
> unnecessarily hard: the whole program can be done in ONE line (not counting
> all the documentation lines).
> --------------------------------------------------------------

> I was thinking that (1) could be accomplished by using a tr line like ( tr
> '\001-\011' '\136') but that replaces some of the non printing with the ^,
> how would i get the letter in there and would I have to have a bunch of
> those tr commands piped together just to accomplish (1)?

> Some help on this would really really be appreciated as its due on Monday
> and I've hit a brick wall on this one.

> -mogrefy

perl -0777pe 'tr/\x80-\xFF//d;
s/([\0-\x09\x0B-\x1F])/"^".chr(ord($1)+64)/eg; s/\x0A/\$\x0A/g;
s/\x7F/^?/g; s/(.{72})/$1\n/mg'

John
--
use Perl;
program
fulfillment

Quote:> perl -0777pe 'tr/\x80-\xFF//d;
> s/([\0-\x09\x0B-\x1F])/"^".chr(ord($1)+64)/eg; s/\x0A/\$\x0A/g;
> s/\x7F/^?/g; s/(.{72})/$1\n/mg'

Reason:

Quote:> > You MUST make use of pipes rather than using
> > files to store intermediate results.

John
--
use Perl;
program
fulfillment

Quote:> Stick this in any pipe you want and it will work.

:-)

--
Sending unsolicited commercial e-mail to this account incurs a fee of
$500 per message, and acknowledges the legality of this contract.

tr -d '[\200-\377]' | cat -v | sed 's/$/\$/' | cut -c1-72

Third test... does your script have the proper first line?

#! /bin/csh -f

Yes.

One point was possible here; your total is now 1/1

Fourth test... is your script executable, and does it work?

[1] 21676

Here is the result of ~masc0077/As5/script1 < ~masc0000/data1 :

A diff of the correct output with your output shows:

ERROR ERROR ERROR ERROR

5,6c5,6

< Make sure you don't mangle square brackets ('[' and ']').$

< consecutive tabs^I^I^I(3 of them)$

---

Quote:> Make sure you don't mangle square brackets ('' and '').$
> consecutive tabs (3 of them)$

< a^Iab^Iabc^Iabcd^Iabcde^Iabcdef^Ix$

---

Quote:> a ab abc abcd abcde abcdef x$

/usr/local/bin/diff -a myoutput youroutput

Two points were possible here; your total is now 1/3

Here is the result of feeding script1 a file with 'long' lines: script1 <
~masc0000/data2

A diff of the correct output with your output shows:

No differences encountered -- CONGRATULATIONS

One point was possible here; your total is now 2/4

The result of feeding script1 a file containing non-ASCII characters:
script1 < ~masc0000/data3

A diff of the correct output with your output shows:

No differences encountered -- CONGRATULATIONS

One point was possible here; your total is now 3/5

The result of feeding script1 a file containing control characters: script1
< ~masc0000/data4

A diff of the correct output with your output shows:

No differences encountered -- CONGRATULATIONS

One point was possible here; your total is now 4/6

Checking your calendar info as well:

cat ~masc0077/calendar

9/19 The "calendar" program mailed this near the due date for Assignments 1
& 2 Assignments 1,2,3 should be completed by the evening of September 25
Assignment 4 is due on Sunday, October 7 Assignment 5 is due on Monday,
October 22 (10/22) Our first programming assignment (program1 - p1.c) is due
Sunday, October 28 (10/28) Assignment 6 is due on Friday, November 2 (11/2)
Our final is scheduled for Thursday, December 20 from 1:00 to 3:00pm

Checking for our current October entries...

One point was possible here; your total is now 5/7

THE AUTOGRADER IS ONLY SMART ENOUGH TO FIGURE OUT THE FIRST SEVEN POINTS.
7/7 is the best total it can achieve right now, so: Your actual grade for
this assignment will be determined by a (human) grader at the due date.

------

Total Points | 5+?| for masc0077 -  for Assignment 5

|----|

| 7+6|

------

Assignment 5 gradesheet

a PARTIAL checklist of things the grader may judge:

Autograder output

___/7

Documentation return values investigated?

___/4 name, class, date?

Algorithm and program style deficiencies documented?

___/ NO 'temporary' files,

Program logic and correctness NO 'helper' files,

___/2 etc...

--------

Total Points | |

| ---- |

| 13 |

--------

--
David Masterson                dmaster AT synopsys DOT com
Sr. R&D Engineer               Synopsys, Inc.
Software Engineering           Sunnyvale, CA

tr -d '[\200-\377]' | cat -vet | cut -c1-72

Now the only thing not showing up is the [  ] (brackets), anyone know how I
can fix this? Is there another
flag that can be used with cat?

-mogrefy

Quote:> In my class we had to write a C program and now we have to write a shell
> script to do the exact same thing. I am not sure where to get started
using
> tr and sed to accomplish this assignment. Here is the assignmnet...

> --------------------------------------------------------------
> (1) remove all non-printing characters (character codes 1 through 31,
>    and 127) and replace them with the same sort of codes the vi
>    editor uses.  For example, the bell character (character code 7)
>    is replaced by the two printable characters "^" and "G" (G is the
seventh
>    letter of the alphabet).  Appendix I of Foster lists the ASCII
character
>    set, and it shows all the proper two-character sequences that should
>    be used for the non-printing characters.  There are two special cases:
>    Replace the delete character by "^?".  Newlines should be replaced by a
>    dollar sign ("$") and then an actual newline.
>    **you may ignore NUL (character code 0)**

> (2) delete all non-ASCII characters (those with character codes 128
through
> 255).

> (3) truncate all output lines that would otherwise extend past column 72.
> Begin
>    reading the data on the next line after ignoring the rest of the
> character past column 72.

> Make sure it reads from stdin and prints to stdout.  It should be
comprised
> of standard UNIX utilities (that is, it should not invoke any specialized
C
> programs
> that you may consider writing). You MUST make use of pipes rather than
using
> files to store intermediate results.  Don't make this assignment
> unnecessarily hard: the whole program can be done in ONE line (not
counting
> all the documentation lines).
> --------------------------------------------------------------

> I was thinking that (1) could be accomplished by using a tr line like ( tr
> '\001-\011' '\136') but that replaces some of the non printing with the ^,
> how would i get the letter in there and would I have to have a bunch of
> those tr commands piped together just to accomplish (1)?

> Some help on this would really really be appreciated as its due on Monday
> and I've hit a brick wall on this one.

> -mogrefy

-mogrefy

tr -d '\200-\377' | cat -vet | cut -c1-72

basically, I think the [   ]'s inside of the 's deleted the brackets also
along with those non ascii characters. Now everything is working and I
should get 100% as long as my documentation is satisfactory to the prof.

-mogrefy