.gitignore

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-bf
-bf.asm
-bf.o
-main
-main.o
-main.hi

README.md

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-# Brainfuck compiler In Haskell
+# bfhaskell
-*ts sucks but i love it*
 
-# what you need
+Brainfuck compiler in haskell
-- GHC (to compile the haskell code)
-- Nasm (to assemble the generated assembly)
-- ld (to link it and stuff, should already be installed tho)
-
-# how to use
-run `ghc main.hs`
-
-do `./main <path to bf>` to generate the assembly (you need to assemble it yourself by doing nasm -felf64 -o bf.o bf.asm && ld -o bf bf.o, you may need to do some linking shenanigans depending on your distro)
-
-# linux only

main.hs

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-import System.Environment
-import System.IO
-
-template = "global _start\n\nSECTION .data\n\nSECTION .bss\ntape resb 255\nbuf resb 1\n\nSECTION .text\n_start:"
-left_arrow = "\n\tsub rax, 1\n\tand rax, 0x00000000000000FF"
-right_arrow = "\n\tadd rax, 1\n\tand rax, 0x00000000000000FF"
-add_bf = "\n\tmov bl, [tape+rax]\n\tadd bl, 1\n\tmov [tape+rax], bl"
-sub_bf = "\n\tmov bl, [tape+rax]\n\tsub bl, 1\n\tmov [tape+rax], bl"
-dot = "\n\tpush rax\n\tpush qword [tape+rax]\n\tmov rax, 1\n\tmov rdi, 1,\n\tmov rsi, rsp\n\tmov rdx, 1\n\tsyscall\n\tpop rax\n\tpop rax"
-comma = "\n\tpush rax\n\tmov rax, 0\n\tmov rdi, 0\n\tmov rsi, buf\n\tmov rdx, 1\n\tsyscall\n\tpop rax\n\tmov rbx, [buf]\n\tmov [tape+rax], bl"
-end = "\n\n\n\tmov rdi, 0\n\tmov rax, 60\n\tsyscall"
-
-opbrack = ":\n\tcmp byte [tape+rax], 0\n\tje close_"
-closbrack = ":\n\tcmp byte [tape+rax], 0\n\tjne open_"
-
-append :: [Int] -> Int -> [Int]
-append stack val = stack ++ [val]
-
-parse_other :: Char -> String
-parse_other char
-    | char == '>' = right_arrow 
-    | char == '<' = left_arrow 
-    | char == '+' = add_bf   
-    | char == '-' = sub_bf 
-    | char == '.' = dot      
-    | char == ',' = comma
-    | otherwise   = ""   
-
-parse_bracket :: Char -> Int -> String
-parse_bracket char index
-    | char == '[' = "\nopen_" ++ show index ++ opbrack ++ show index
-    | char == ']' = "\nclose_" ++ show index ++ closbrack ++ show index
-    | otherwise = "" -- never
-
-parse :: String -> Int -> [Int] -> String -- the stack contains positions
-parse file index brackstack
-    | index == (length file) = ""
-    | file!!index == '[' = parse_bracket (file!!index) index ++ (parse file (index+1) (append brackstack index))
-    | file!!index == ']' = parse_bracket (file!!index) (last brackstack) ++ (parse file (index+1) (init brackstack))
-    | otherwise = (parse_other $ file!!index) ++ parse file (index+1) brackstack
-
-main :: IO()
-main = do
-    -- let file = "/home/coderlol/code/bfhaskell/test/test.bf"
-    args <- getArgs
-    print("Compiling " ++ (args!!0) ++ "...")
-    content <- readFile(args!!0)
-    let stuff =  template ++  (parse content 0 []) ++ end
-    writeFile "./bf.asm" stuff

test/test.bf

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->++++++++[<+++++++++>-]<.>++++[<+++++++>-]<+.+++++++..+++.>>++++++[<+++++++>-]<+
-+.------------.>++++++[<+++++++++>-]<+.<.+++.------.--------.>>>++++[<++++++++>-
-]<+.

test/test1.bf

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-++++++ 6
-[->++++++++++<]>+++++. 65

test/test2.bf

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-,+++.