Move Python code to its own directory.

bin/python/ripple/util/Decimal.py

@@ -0,0 +1,46 @@
+from __future__ import absolute_import, division, print_function, unicode_literals
+
+"""Fixed point numbers."""
+
+POSITIONS = 10
+POSITIONS_SHIFT = 10 ** POSITIONS
+
+class Decimal(object):
+    def __init__(self, desc='0'):
+        if isinstance(desc, int):
+            self.value = desc
+            return
+        if desc.startswith('-'):
+            sign = -1
+            desc = desc[1:]
+        else:
+            sign = 1
+        parts = desc.split('.')
+        if len(parts) == 1:
+            parts.append('0')
+        elif len(parts) > 2:
+            raise Exception('Too many decimals in "%s"' % desc)
+        number, decimal = parts
+        # Fix the number of positions.
+        decimal = (decimal + POSITIONS * '0')[:POSITIONS]
+        self.value = sign * int(number + decimal)
+
+    def accumulate(self, item):
+        if not isinstance(item, Decimal):
+            item = Decimal(item)
+        self.value += item.value
+
+    def __str__(self):
+        if self.value >= 0:
+            sign = ''
+            value = self.value
+        else:
+            sign = '-'
+            value = -self.value
+        number = value // POSITIONS_SHIFT
+        decimal = (value % POSITIONS_SHIFT) * POSITIONS_SHIFT
+
+        if decimal:
+            return '%s%s.%s' % (sign, number, str(decimal).rstrip('0'))
+        else:
+            return '%s%s' % (sign, number)