Tool to decode / code in whitespace, an exotic programming language that only uses blank / invisible characters like space, tab or newline/line feed.
Whitespace Language - dCode
Tag(s) : Programming Language
dCode is free and its tools are a valuable help in games, maths, geocaching, puzzles and problems to solve every day!
A suggestion ? a feedback ? a bug ? an idea ? Write to dCode!
The Whitespace programming language gets its name from the fact that it uses only the 3 white characters: space, tab and newline. The source code of programs written in Whitespace are therefore invisible.
In order to make the code visible, it is common to use 3 characters: S for space (Space), T for tabulation (Tab), and L for new line (Line feed).
All visible characters are ignored by the program and can be used as comments (or to catch attention).
The whitespace uses a stack, a heap and 22 structured instructions, which start with an IMP (Modification Parameter Instruction) among 5 possible: S (space) modifies the stack, TS (tab + space) performs a calculation, TT (tab + tab) accesses the heap, L (line feed) manages the goto / jump of the program and TL (tab + line feed) manages I / O.
The complete list of 22 Whitespace instructions:
|IMP + Command||Parameter||Description|
|S S||Number||Stacks the number|
|S LS||Copy top of stack|
|S LT||Reverse the top two items of the stack|
|S LL||Remove top of stack|
|TS TS||Integer Division|
|TT S||Save to heap|
|TT T||Get the heap|
|L SS||Label||Create a label in the program|
|L ST||Label||Label call|
|L SL||Label||Jump to the label|
|L TS||Label||Jump to label if top of stack is 0|
|L TT||Label||Jump to the label if the top of the stack is <0|
|L TL||End of the subroutine, and return|
|L LL||End of program|
|TL SS||Show top of stack as ASCII character|
|TL ST||Display top of stack as an integer|
|TL TS||Read a character and save it at the address described by the top of the stack|
|TL TT||Read a number and store it at the address described by the top of the stack|
The numbers respect a specific syntax: sign + absolute values in binary + line feed. The sign is S (space) for positive or T (tabulation) for negative. The value of the number is written in binary with S (space) for 0 and T (tabulation) for 1.
Example: The number +97 is positive (coded S) and has the binary value 1100001 (coded TTSSSST), so it is coded as S TTSSSST L
Example: SS STTSSSSTL TLSS corresponds to the instruction stacks the number 97 and displays it as an ASCII character, so the program displays a.
The interpretation of white-space corresponds to the reading and application of coded instructions.
On dCode, it is possible to read a file (generally with the extension .ws) or to copy and paste a program (be careful not to add a space or a new line unintentionally because this could cause errors)
The message is invisible, consisting only of spaces, tabs and newlines.
Sometimes the characters S, T and C accompany the code.
It is possible to accompany the code with any text (visible characters only) without affecting it, so it is an excellent method of steganography.
Whitespace was described on April 1, 2003 by Edwin Brady and Chris Morris (as an April Fool) at Durham University.