bfpy

README.md

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+# Brainfuck in python
+
+Experimenting with writing a brainfuck intepreter in python
+
+The bf program is passed in as a string argument to the python (¬‿¬)
+
+Excuse the code, I will add comments in the future
+
+Hello World:
+```
++++++++++++++++++++++++++[>++>+++>++++>+++++<<<<-]+++++++++++++++++++++++++>>>++++.---.+++++++..+++.<<<+++++++.>>>>------.<.+++.------.--------.>+++++++.```

bf.py

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+import sys
+import getch
+
+memory, stack, ptr, i, program = [0 for v in range(300000)], [], 0, 0, sys.argv[1]
+
+
+while i < len(program):
+    cmd = program[i]
+
+    memory[ptr], ptr = (
+                            (memory[ptr] - 1) % 256
+                        ) if cmd == "-" else (
+                                (memory[ptr] + 1) % 256
+                        ) if cmd == "+" else [
+                                lambda x:
+                                    memory[ptr],
+                                lambda x:
+                                    ord(getch.getch()),
+                                print(
+                                        chr(memory[ptr]),
+                                    end="")
+                                    if cmd == "." 
+                                    else None
+
+                                ][
+                                        1 
+                                        if cmd == "," 
+                                        else 
+                                        0
+                                    ](None), (
+                                                (ptr - 1) % len(
+                                                                memory
+                                                                ) 
+                                            ) if cmd == "<" else (
+                                                (ptr + 1) % len(
+                                                                memory
+                                                                )
+                                            ) if cmd == ">" else ( 
+                                                ptr
+                                            )
+
+    if cmd == "]":
+        depth = 0
+
+        while not (program[i] == "[" and depth == 0):
+            depth, i = (
+                            depth + 1
+                    ) if program[i-1] == "]" else (
+                            depth - 1
+                    ) if program[i-1] == "[" and depth != 0 else (
+                            depth
+                    ), i-1
+        i -= 1
+
+    if cmd == "[":
+        if memory[ptr] == 0:
+            depth = 0
+
+            while not (program[i] == "]" and depth == 0) and i < len(program):
+                depth, i = (
+                            depth + 1 
+                        ) if program[i+1] == "[" else (
+                            depth - 1
+                        ) if program[1+i] == "]" and depth != 0 else (
+                            depth
+                        ), i+1
+
+    i += 1
+
+        
+