Data commit

Task/Execute-SNUSP/Python/execute-snusp.py

@@ -0,0 +1,55 @@
+#!/usr/bin/env python3
+
+HW = r'''
+/++++!/===========?\>++.>+.+++++++..+++\
+\+++\ | /+>+++++++>/ /++++++++++<<.++>./
+$+++/ | \+++++++++>\ \+++++.>.+++.-----\
+      \==-<<<<+>+++/ /=.>.+>.--------.-/'''
+
+def snusp(store, code):
+    ds = bytearray(store)  # data store
+    dp = 0                 # data pointer
+    cs = code.splitlines() # 2 dimensional code store
+    ipr, ipc = 0, 0        # instruction pointers in row and column
+    for r, row in enumerate(cs):
+        try:
+            ipc = row.index('$')
+            ipr = r
+            break
+        except ValueError:
+            pass
+    rt, dn, lt, up = range(4)
+    id = rt  # instruction direction.  starting direction is always rt
+    def step():
+        nonlocal ipr, ipc
+        if id&1:
+            ipr += 1 - (id&2)
+        else:
+            ipc += 1 - (id&2)
+    while ipr >= 0 and ipr < len(cs) and ipc >= 0 and ipc < len(cs[ipr]):
+        op = cs[ipr][ipc]
+        if op == '>':
+            dp += 1
+        elif op == '<':
+            dp -= 1
+        elif op == '+':
+            ds[dp] += 1
+        elif op == '-':
+            ds[dp] -= 1
+        elif op == '.':
+            print(chr(ds[dp]), end='')
+        elif op == ',':
+            ds[dp] = input()
+        elif op == '/':
+            id = ~id
+        elif op == '\\':
+            id ^= 1
+        elif op == '!':
+            step()
+        elif op == '?':
+            if not ds[dp]:
+                step()
+        step()
+
+if __name__ == '__main__':
+    snusp(5, HW)