Merge pull request #1419 from xexyl/huffman96

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Landon Curt Noll authored and GitHub committed 2023-11-14 11:40:35 -07:00
commit 61d60b79c2
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@@ -1,7 +1,37 @@
#!/usr/bin/env bash
#
# try.sh - show IOCCC winner 1996/huffman
#
# ...
#
# So, that's to end the story for you and me
# If you still give a listen, you just may
# Hear a big wolf-man or little piggy say
# Little pig, little pig, let me in
# Not by the hair of my chinny, chin, chin
# Little pig, little pig, let me in
# Not by the hair of my chinny, chin, chin
# Well, I'm huffin', I'm puffin', I'll blow your house in
# Huffin', puffin', blow your house in
# Huffin', puffin', blow your house in
# Huffin' and a puffin' and I'll blow your house in!
# And the moral of the story is
# band with no talent can easily amuse
# Idiots with a stupid, puppet show
#
# :-)
make all >/dev/null || exit 1
# make sure CC is set so that when we do make CC="$CC" it isn't empty. Doing it
# this way allows us to have the user specify a different compiler in an easy
# way.
if [[ -z "$CC" ]]; then
CC="cc"
fi
make CC="$CC" all >/dev/null || exit 1
# clear screen after compilation so that only the entry is shown
clear
echo "$ echo 'seeing or feeling is believing' | ./huffman" 1>&2
echo 'seeing or feeling is believing' | ./huffman 2>/dev/null
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## To use:
```sh
./schneiderwent datafile
./schneiderwent
```
@@ -57,20 +57,21 @@ deficiency.
Obfuscation in this entry consists of:
* `printf()`ing console messages stored as EBCDIC character values - this is not
* `printf(3)`ing console messages stored as
[EBCDIC](https://en.wikipedia.org/wiki/EBCDIC) character values - this is not
an attempt at encryption, but rather at cross platform compatibility.
* ASCII character values are calculated from the EBCDIC in a particularly ugly
abuse of the '?' operator.
* [ASCII](https://en.wikipedia.org/wiki/ASCII) character values are calculated
from the EBCDIC in a particularly ugly abuse of the `?:` operator.
* Detection of whether to print the ASCII or EBCDIC values is done by taking the
remainder of dividing the character `'J'` by `2` - the ASCII value of the
character is even, the EBCDIC value is odd.
* The messages to be `printf`ed are determined via multiple table lookups and
* The messages to be `printf(3)`ed are determined via multiple table lookups and
bit-masked values.
* For minutes, the bit position turned on is multiplied by two to determine the
message to be `printf`ed.
message to be `printf(3)`ed.
* For hours, the straight bit position is used.
* This entry mostly eschews function calls for the often overlooked
setjmp/longjmp combination.
`setjmp(3)`/`longjmp(3)` combination.
* The trigraphs are not there as obfuscation nor are they there to annoy the
judges - it's just the easiest way to get around the absence of square brackets
in a normal 3270 environment.