Ik las ergens van een dude die om ruimte te besparen code op ging slaan in de bestandsnaam:
Selected notes from the author:
"Practical and efficient method of compressing source code"
1. Introduction
I will shortly present a totally new compression method.
It may be used to compress any types of files, but it works
best with C-source code.
As an example, I have taken a simple "Hello world!" program
that should be familiar to all C-programmers.
Listing 1. A simple "Hello World" program:
main()
{
puts("Hello World!");
}
2. Packing method
Normally a file name is used only to identify the file,
but this new revolutionary method introduces a totally new concept:
THE FILE NAME IS THE PROGRAM. There is no need to waste
valuable disk space to store source code. The program is
embedded in the file name, only a minor portion of it
is inside the file.
Listing 2. Compressed "Hello world":
char*_=__FILE__;
Listing 3. Code embedded in the file name:
";main(){puts("Hello World!");}char*C=".c
The sample program in listing 1 is 36 bytes long. By using the new
compression method, the example program may be squeezed to sixteen
bytes. In the example the compression ratio is 2:1. It is evident
that the longer the program is, the better the compression ratio
is. The maximum compression ratio in a UNIX environment is 254:16
which equals approximately to 16:1. By using the method a one
megabyte of source code can be compressed to 64 kilobytes.
One might easily think that the program could be compressed to a
single byte by writing a one character long preprocessor directive
in the source file and defining the actual source code in the
command line, eg. 'cc hello.c -DX=main(){puts...'. With this
method nothing is gained, since the compiling commands must be
stored in a file, and that takes even more space than writing the
code in a source file as presented in listing 1.
3. Packing files in a UNIX environment
In a UNIX environment it is possible to write almost any program by
including the code in file names. Since '/' is used to separate
path components and cannot therefore exist in a file name, all
features of C-language cannot be used.
In C, the '/' is used as a division operator and it may also be a
part of a comment start and end identifier. This is, however, not a
dangerous limitation, since practice has shown that comments are
almost totally unnecessary. A real programmer can more easily
understand pure source code, and misleading comments are
disastrous. The division operation may be replaced with pow(x, -1)
and multiplication when using real numbers or with div() function
when using integers.
Large programs must be separated into small modules. This enforces
people to write better programs, since monolithic programming style
cannot be used. Program development will also be faster, no extra
code need not be recompiled after changes have been made.
4. Conclusions
The method can be used to compress any types of files, actually the
compression ratios are even better when compressing other files
than C-source. For example plain text files may be compressed with
INFINITE compression ratio. It is trivial task to compress a 100
kilobytes long text file in about 400 files whose lengths are zero
bytes. The drawback is that the files must be unpacked before they
can be used, so a large amount of temporary disk space is needed,
while C-source is totally usable in the compressed form.
Evidently, there is a long way to go before this new programming
technique may be widely used, since currently there are only few
tools supporting it. The advantages over the traditional methods
are, however, so great that there is no doubt that this method will
be new standard.
Copyright (c) 1993, Landon Curt Noll & Larry Bassel.
All Rights Reserved. Permission for personal, educational or non-profit use is
granted provided this this copyright and notice are included in its entirety
and remains unaltered. All other uses must receive prior permission in writing
from both Landon Curt Noll and Larry Bassel.
C:
1
2
| lmfjyh.c
char*_=__FILE__; |
Misschien dat je dat toe zou kunnen passen op javascript?
[edit]
Werkende versie:
Bestand:
C:\Webroot\_dev\_js\!\document.write('Hello World!')\if(1 == 2) { document.write('nooit');} else {document.write('altijd'); }\i.html
Uitleg
De map
! geeft het begin van de code aan, de naam van de code is hard-gecodeerd in de js. Je kunt geen / in je code gebruiken, of tekens die niet in een bestandsnaam mogen. (:, ?, <, >, |, etc). Iedere submap bevat een nieuwe instructie, waarbij de / vervangen wordt door een ;.
JavaScript:
1
| eval(unescape(window.location).match(/\/!\/(.*)\i.html$/)[1].replace(/\//g,';')); |
[
Voor 19% gewijzigd door
Skaah op 24-03-2004 23:56
]
.
/u/45865/crop62338715be02f.png?f=community)
:strip_exif()/u/50656/andre-scholten-avatar.gif?f=community){kind=avatar}
:strip_icc():strip_exif()/u/18407/got_thumb.jpg?f=community)
grrr, nou moet ik de mijne natuurlijk ook kleiner krijgen 
maar ik snap het nou wel 
:strip_exif()/u/51756/iglo.gif?f=community)
/u/7685/ruinmytune-60x60.png?f=community)
/u/24411/img.png?f=community)
:strip_exif()/u/925/cookieani.gif?f=community)
/u/5838/nos-meeting-54-icon.png?f=community){kind=icon}
:strip_icc():strip_exif()/u/62931/Icongoed.jpg?f=community)
:strip_exif()/u/25820/raptorsafari.gif?f=community)
/u/20329/donald%2520avatar.png?f=community){kind=avatar}
:strip_exif()/u/3333/pumpkin_avatar.gif?f=community){kind=avatar}
). De maximale besparing is dus de ruimte die gereserveerd wordt voor een bestandsnaam minus de kortst denkbare bestandsnaam.:strip_icc():strip_exif()/u/50076/dosto_60.jpg?f=community)
:strip_exif()/u/27216/bosmonster_dropdown.gif?f=community)
:strip_icc():strip_exif()/u/69009/eend.jpg?f=community)
:strip_exif()/u/51719/gir.gif?f=community)
(al is Math.random() erg langzaam in Firefox?)
:strip_exif()/u/90057/goticon.gif?f=community)
/u/34048/crop671ffd4cceb26_cropped.png?f=community)
:strip_icc():strip_exif()/u/39264/notpingu.jpg?f=community)
hij laat niet eens het rode blokje zien.
Dit topic is gesloten.