02434e6b15
Console-based REPL Implementation - Use Jump table dispatch for execution - RLE preprocessing as optimization - Buffered output to minimize redraw - File loading support via run command - Add REPL commands: help, run, clear, reset, exit - Two implementation: bf_shell_interp.asm, bf_console_interp.asm This is my first contribution to KolibriOS for GSOC 2026 WASM runtime project preparation
200 lines
5.8 KiB
Brainfuck
200 lines
5.8 KiB
Brainfuck
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Takes an integer from stdin and emits its factors to stdout
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Factor an arbitrarily large positive integer
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Copyright (C) 1999 by Brian Raiter
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under the GNU General Public License
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]
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>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>-
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*
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* read in the number
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*
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<<<<<<<<<+
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[-[>>>>>>>>>>][-]<<<<<<<<<<[[->>>>>>>>>>+<<<<<<<<<<]<<<<<<<<<<]
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>>>>>>>>>>,----------]
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>>>>>>>>>>[------------------------------------->>>>>>>>>->]
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<[+>[>>>>>>>>>+>]<-<<<<<<<<<<]-
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*
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* display the number and initialize the loop variable to two
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*
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[>++++++++++++++++++++++++++++++++++++++++++++++++.
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------------------------------------------------<<<<<<<<<<<]
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++++++++++++++++++++++++++++++++++++++++++++++++++++++++++.
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--------------------------.[-]
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>>>>>>>>>>>>++<<<<+
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*
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* the main loop
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*
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[ [-]>>
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*
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* make copies of the number and the loop variable
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*
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[>>>>[-]>[-]>[-]>[-]
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>[-]>[-]
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<<<<<<<[->>>+>+<<<<]>>>>>>>>]
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<<<<<<<<<<[>>>>>>[-<<<<+>>>>]<<<<<<<<<<<<<<<<]>>>>>>>>>>
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[>[->>>+>>+<<<<<]>>>>>>>>>]
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<<<<<<<<<<[>>>>>>[-<<<<<+>>>>>]<<<<<<<<<<<<<<<<]>>>>>>>>>>
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*
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* divide the number by the loop variable
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*
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[>>>[-]>>>[-]>[-]>>>] initialize
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<<<<<<<<<<[<<<<<<<<<<]
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>>>>>>>>>[-]>>>>>>>+<<<<<<<<[+]+
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[ ->> double divisor until above dividend
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[>>>>>>[->++<]>>>>]<<<<<<<<<<
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[>>>>>>>>[-]>[-]
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<<<<[->>>++<<<]<<<<<<<<<<<<<<<]>>>>>>>>>>
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[>>>>>>>>[->+<[->+<[->+<[->+<[->+<[->+<[->+<[->+<[->+<
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[->--------->>>>>>>>>+<<<<<<<<<<[->+<]]]]]]]]]]]>>]
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<<<<<<<<<<[>>>>>>>>>[-<+<<<+>>>>]<<<<<<<<<<<<<<<<<<<]>>>>>>>>>>
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[>>>>>>>[-<+>[-<+>[-<+>[-<+>[-<+>[-<+>[-<+>[-<+>[-<+>
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[-<--------->>>>>>>>>>>+<<<<<<<<<<[-<+>]]]]]]]]]]]>>>]
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<<<<<<<<<<
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[>>>>[->>>+>>+<<<<<]<<<<<<<<<<<<<<]
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>>>>>>>>>>[>>>>>>>[-<<<+>>>]>>>]<<<<<<<<<<
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[>>>>>>>>[->-<]>
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[<<<<<<<<<[<[-]>>>>>>>>>>[-<<<<<<<<<<+>>>>>>>>>>]<<<<<<<<<<<<<<<<<<<]
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>>>>>>>>>>>>>>>>>>>]
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<<<<<<<<<<<<<<<<<<<]
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>>>>>>>>>[+[+[+[+[+[+[+[+[+[+[[-]<+>]]]]]]]]]]]<
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]
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>>>>>>>>
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[ subtract divisor from dividend
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<<<<<<
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[>>>>>>>>[-]>[-]<<<<<[->>>+>+<<<<]>>>>>>]<<<<<<<<<<
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[>>>>>>>>[-<<<<+>>>>]<<<[->>>+>+<<<<]<<<<<<<<<<<<<<<]>>>>>>>>>>
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[>>>>>>>>>[-<<<<+>>>>]>]<<<<<<<<<<
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[>>>>>>>>[-<->]<<<<<<<<<<<<<<<<<<]>>>>>>>>>>
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[>>>>>>>[->+<[->+<[->+<[->+<[->+<[->+<[->+<[->+<[->+<[->+<
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[++++++++++[+>-<]>>>>>>>>>>-<<<<<<<<<<]]]]]]]]]]]>>>]
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>>>>>>>+
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[ if difference is nonnegative then
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[-]<<<<<<<<<<<<<<<<< replace dividend and increment quotient
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[>>>>[-]>>>>[-<<<<+>>>>]<<[->>+<<]<<<<<<<<<<<<<<<<]>>>>>>>>>>
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[>>>>>>>>[->+<<<+>>]>>]<<<<<<<<<<
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[>>>[->>>>>>+<<<<<<]<<<<<<<<<<<<<]>>>>>>>>>>
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[>>>>>>>>>[-<<<<<<+>>>>>>[-<<<<<<+>>>>>>
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[-<<<<<<+>>>>>>[-<<<<<<+>>>>>>
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[-<<<<<<+>>>>>>[-<<<<<<+>>>>>>
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[-<<<<<<+>>>>>>[-<<<<<<+>>>>>>
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[-<<<<<<+>>>>>>[-<<<<<<--------->>>>>>>>>>>>>>>>+<<<<<<<<<<
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[-<<<<<<+>>>>>>]]]]]]]]]]]>]
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>>>>>>>
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] halve divisor and loop until zero
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<<<<<<<<<<<<<<<<<[<<<<<<<<<<]>>>>>>>>>>
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[>>>>>>>>[-]<<[->+<]<[->>>+<<<]>>>>>]<<<<<<<<<<
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[+>>>>>>>[-<<<<<<<+>>>>>>>[-<<<<<<<->>>>>>+>
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[-<<<<<<<+>>>>>>>[-<<<<<<<->>>>>>+>
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[-<<<<<<<+>>>>>>>[-<<<<<<<->>>>>>+>
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[-<<<<<<<+>>>>>>>[-<<<<<<<->>>>>>+>
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[-<<<<<<<+>>>>>>>]]]]]]]]]<<<<<<<
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[->>>>>>>+<<<<<<<]-<<<<<<<<<<]
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>>>>>>>
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[-<<<<<<<<<<<+>>>>>>>>>>>]
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>>>[>>>>>>>[-<<<<<<<<<<<+++++>>>>>>>>>>>]>>>]<<<<<<<<<<
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[+>>>>>>>>[-<<<<<<<<+>>>>>>>>[-<<<<<<<<->>>>>+>>>
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[-<<<<<<<<+>>>>>>>>[-<<<<<<<<->>>>>+>>>
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[-<<<<<<<<+>>>>>>>>[-<<<<<<<<->>>>>+>>>
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[-<<<<<<<<+>>>>>>>>[-<<<<<<<<->>>>>+>>>
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[-<<<<<<<<+>>>>>>>>]]]]]]]]]<<<<<<<<
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[->>>>>>>>+<<<<<<<<]-<<<<<<<<<<]
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>>>>>>>>[-<<<<<<<<<<<<<+>>>>>>>>>>>>>]>>
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[>>>>>>>>[-<<<<<<<<<<<<<+++++>>>>>>>>>>>>>]>>]<<<<<<<<<<
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[<<<<<<<<<<]>>>>>>>>>>
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>>>>>>
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]
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<<<<<<
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*
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* make copies of the loop variable and the quotient
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*
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[>>>[->>>>+>+<<<<<]>>>>>>>]
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<<<<<<<<<<
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[>>>>>>>[-<<<<+>>>>]<<<<<[->>>>>+>>+<<<<<<<]<<<<<<<<<<<<]
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>>>>>>>>>>[>>>>>>>[-<<<<<+>>>>>]>>>]<<<<<<<<<<
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*
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* break out of the loop if the quotient is larger than the loop variable
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*
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[>>>>>>>>>[-<->]<
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[<<<<<<<<
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[<<[-]>>>>>>>>>>[-<<<<<<<<<<+>>>>>>>>>>]<<<<<<<<<<<<<<<<<<]
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>>>>>>>>>>>>>>>>>>]<<<<<<<<<<<<<<<<<<]
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>>>>>>>>[>-<[+[+[+[+[+[+[+[+[+[[-]>+<]]]]]]]]]]]>+
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[ [-]
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*
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* partially increment the loop variable
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*
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<[-]+>>>>+>>>>>>>>[>>>>>>>>>>]<<<<<<<<<<
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*
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* examine the remainder for nonzero digits
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*
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[<<<<<<[<<<<[<<<<<<<<<<]>>>>+<<<<<<<<<<]<<<<]
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>>>>>>>>>>>>>>>>>>>>[>>>>>>>>>>]<<<<<<<<<<[<<<<<<<<<<]
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>>>>-
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[ [+]
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*
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* decrement the loop variable and replace the number with the quotient
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*
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>>>>>>>>-<<[>[-]>>[-<<+>>]>>>>>>>]<<<<<<<<<<
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*
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* display the loop variable
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*
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[+>>[>>>>>>>>+>>]<<-<<<<<<<<<<]-
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[>>++++++++++++++++++++++++++++++++++++++++++++++++.
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------------------------------------------------<<<<<<<<<<<<]
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++++++++++++++++++++++++++++++++.[-]>>>>
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]
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*
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* normalize the loop variable
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*
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>>>>>>
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[>>[->>>>>+<<<<<[->>>>>+<<<<<
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[->>>>>+<<<<<[->>>>>+<<<<<
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[->>>>>+<<<<<[->>>>>+<<<<<
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[->>>>>+<<<<<[->>>>>+<<<<<
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[->>>>>+<<<<<[->>>>>--------->>>>>+<<<<<<<<<<
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[->>>>>+<<<<<]]]]]]]]]]]>>>>>>>>]
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<<<<<<<<<<[>>>>>>>[-<<<<<+>>>>>]<<<<<<<<<<<<<<<<<]
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>>>>>>>>>
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]<
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]>>
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*
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* display the number and end
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*
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[>>>>>>>>>>]<<<<<<<<<<[+>[>>>>>>>>>+>]<-<<<<<<<<<<]-
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[>++++++++++++++++++++++++++++++++++++++++++++++++.<<<<<<<<<<<]
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++++++++++.
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