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1 | This is a collection of filters to do all sorts of strange things to text. |
2 | B1ff, the Swedish Chef, and an eleet filter are included. |
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3 | |
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4 | Since the original versions of some of these filters have copyright |
5 | problems, I have done a "clean room" re-implementation of the original lex |
6 | filters in perl. I did this without looking at the original code to the |
7 | filters at all, I simply observed their output and drew my own conclusions, |
8 | and wrote my own code. Then I compared the output of the original and new |
9 | filters when ran on large bodies of text, and fixed the things I had |
10 | missed. |
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11 | |
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12 | Here are the results of my investigations of how the filters work: |
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13 | |
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14 | eleet: |
15 | This is the simplest filter to figure out. The letters a-z of |
16 | the alphabet are replaced with the following letters: |
17 | 4 b c d 3 f g h 1 j |< l /\/\ /\/ 0 p q r 5 + u \/ \/\/ >< y z |
18 | Note that the equivalent translation is done on upper-case letters. |
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19 | |
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20 | fudd: |
21 | |
22 | This one is trivial too. A few transpositions happen differently if |
23 | the letter is at the end of the word or not, and I think I found |
24 | all the transpositions with only a few paragraphs of sample output. |
25 | The only weird thing is that 'n.' is changed to "n, uh-hah-hah-hah." |
26 | (Works well with sentances ending in "gun." ..) |
27 | |
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28 | chef: |
29 | Personally my favorite filter. This took a bit of work to figure |
30 | out, and I doubt I have everything correct. Note that due to a bug |
31 | or an odd feature of the original program, it doesn't seem to think |
32 | that the first letter of the first word is really the first letter |
33 | of a word and so some of the words below don't trigger for that first |
34 | word. I did not emulate this behavior because I think it's probably a |
35 | bug. |
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36 | |
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37 | The word "bork" is never changed, no matter what any of these |
38 | rules may say. Neither is "Bork". |
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39 | |
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40 | The following translations only happen to letters that are the first |
41 | letter of a word of at least 2 letters in size: |
42 | o -> oo |
43 | O -> Oo |
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44 | |
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45 | These happen to letters that are not the last letter of a word: |
46 | a -> e |
47 | A -> e |
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48 | |
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49 | These translations only happen if the letter is not the first letter |
50 | of a word: |
51 | f -> ff |
52 | i -> ee (but only the first `i' per word) |
53 | o -> u |
54 | u -> oo |
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55 | |
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56 | These translations always happen: |
57 | v -> f |
58 | V -> F |
59 | w -> v |
60 | W -> V |
61 | an -> un |
62 | An -> Un |
63 | au -> oo |
64 | Au -> Oo |
65 | |
66 | Any occurrence of "e" at the end of a word is changed to "e-a". |
67 | |
68 | Any occurrence of "e" and the beginning of a word is changed to "i". |
69 | Same with capitals. |
70 | |
71 | Any occurrence of "the" is changed to "zee", any occurrence of |
72 | "The", to "Zee". |
73 | |
74 | Any occurrence of "tion" in a word, to "shun". |
75 | |
76 | Any "th" at the end of a word is changed to "t". |
77 | |
78 | Any "en" at the end of a word is changed to "ee". |
79 | |
80 | Any "ow" at the end of a word is changed to "oo". |
81 | |
82 | And of course, after any `.', `?', or `!' that is at the end of a |
83 | line, the Chef prints out a new line, and then the famous |
84 | "Bork Bork Bork!", and then another newline. |
85 | |
86 | Known bugs in this implementation: |
87 | - says "frunch", not "french". |
88 | - still quite buggy in general. |
89 | |
90 | b1ff: |
91 | Unlike the other filters, b1ff does not try to be an exact duplicate |
92 | of its predecessor. |
93 | |
94 | After upper-casing everything, b1ff does some word and sub-word |
95 | substitutions, most of them misspellings. |
96 | |
97 | B1ff also changes punctuation - All commas become periods; all |
98 | semicolons, commas. Question and exclamation marks are changed to |
99 | things like "!!!!1!" and "?!?!?!". It looks like the original filter |
100 | decided how long a sequence to print based on the text input before |
101 | the end of sentence. I took a simpler route and just randomized it. |
102 | |
103 | Written by Joey Hess <joey@kitenet.net> |