Add basic string support

rforth.py

@@ -1,9 +1,10 @@
 #!/usr/bin/python3
 import argparse
 stack = []
-heap = [0] * 20
+heap = [0] * 100
 next_heap = 0
 compiling = False
+reading_string = False
 words = {}
 word_name = ""
 
@@ -19,7 +20,7 @@ def get_input():
 def parse_input(input_string, say_ok=True):
     while len(input_string) > 0:
         string = str(input_string[0])
-        if not compiling:
+        if not compiling and not reading_string:
             if string.isnumeric():
                 add_to_stack(string)
             elif string == "stack":
@@ -66,7 +67,14 @@ def parse_input(input_string, say_ok=True):
                 dump_heap()
             elif string == "alloc":
                 alloc()
-        else:
+            elif string == 's"':
+                start_reading_string()
+        elif reading_string:
+            if string == '"':
+                stop_reading_string()
+            else: 
+                add_new_word_to_string(string)
+        elif compiling and not reading_string:
             if string == ";":
                 stop_compiling()
             else:
@@ -74,7 +82,9 @@ def parse_input(input_string, say_ok=True):
         input_string = get_next(input_string)
     if say_ok:
         print("ok.")
-
+def add_new_word_to_string(string):
+    for char in string[::-1]:
+        stack.insert(0, ord(char))
 def dump_heap():
     print(heap)
 
@@ -179,6 +189,14 @@ def add_to_new_word(value):
     else:
         words[word_name] = words[word_name] + value + " "
 
+def start_reading_string():
+    global reading_string
+    reading_string = True
+
+def stop_reading_string():
+    global reading_string
+    reading_string = False
+
 def start_compiling():
     global compiling
     compiling = True