catacomb/__init__.py: Implement `rich' comparisons on rationals.

[catacomb-python] / catacomb / __init__.py

diff --git a/catacomb/__init__.py b/catacomb/__init__.py
index bbbe74b..508f1f8 100644 (file)
--- a/catacomb/__init__.py
+++ b/catacomb/__init__.py
@@ -80,6 +80,10 @@ lostexchook = default_lostexchook
 ## Text/binary conversions.
 def _bin(s): return s
 
+## Iterating over dictionaries.
+def _iteritems(dict): return dict.iteritems()
+def _itervalues(dict): return dict.itervalues()
+
 ## How to fix a name back into the right identifier.  Alas, the rules are not
 ## consistent.
 def _fixname(name):
@@ -103,9 +107,9 @@ def _init():
     if i[0] != '_':
       d[i] = b[i];
   for i in [gcciphers, gcaeads, gchashes, gcmacs, gcprps]:
-    for c in i.itervalues():
+    for c in _itervalues(i):
       d[_fixname(c.name)] = c
-  for c in gccrands.itervalues():
+  for c in _itervalues(gccrands):
     d[_fixname(c.name + 'rand')] = c
 _init()
 
@@ -157,7 +161,8 @@ def _pp_commas(pp, printfn, items):
     else: pp.text(','); pp.breakable()
     printfn(i)
 def _pp_dict(pp, items):
-  def p((k, v)):
+  def p(kv):
+    k, v = kv
     pp.begin_group(0)
     pp.pretty(k)
     pp.text(':')
@@ -175,10 +180,10 @@ class _tmp:
   def fromhex(x):
     return ByteString(_unhexify(x))
   fromhex = staticmethod(fromhex)
-  def __hex__(me):
-    return _hexify(me)
+  def hex(me): return _hexify(me)
+  __hex__ = hex
   def __repr__(me):
-    return 'bytes(%r)' % hex(me)
+    return 'bytes(%r)' % me.hex()
 _augment(ByteString, _tmp)
 ByteString.__hash__ = str.__hash__
 bytes = ByteString.fromhex
@@ -187,7 +192,7 @@ bytes = ByteString.fromhex
 ### Symmetric encryption.
 
 class _tmp:
-  def encrypt(me, n, m, tsz = None, h = ByteString('')):
+  def encrypt(me, n, m, tsz = None, h = ByteString.zero(0)):
     if tsz is None: tsz = me.__class__.tagsz.default
     e = me.enc(n, len(h), len(m), tsz)
     if not len(h): a = None
@@ -195,7 +200,7 @@ class _tmp:
     c0 = e.encrypt(m)
     c1, t = e.done(aad = a)
     return c0 + c1, t
-  def decrypt(me, n, c, t, h = ByteString('')):
+  def decrypt(me, n, c, t, h = ByteString.zero(0)):
     d = me.dec(n, len(h), len(c), len(t))
     if not len(h): a = None
     else: a = d.aad().hash(h)
@@ -382,12 +387,15 @@ class BaseRat (object):
     return type(me)(me._d*n, me._n*d)
   __div__ = __truediv__
   __rdiv__ = __rtruediv__
-  def __cmp__(me, you):
-    n, d = _split_rat(you)
-    return cmp(me._n*d, n*me._d)
-  def __rcmp__(me, you):
+  def _order(me, you, op):
     n, d = _split_rat(you)
-    return cmp(n*me._d, me._n*d)
+    return op(me._n*d, n*me._d)
+  def __eq__(me, you): return me._order(you, lambda x, y: x == y)
+  def __ne__(me, you): return me._order(you, lambda x, y: x != y)
+  def __le__(me, you): return me._order(you, lambda x, y: x <= y)
+  def __lt__(me, you): return me._order(you, lambda x, y: x <  y)
+  def __gt__(me, you): return me._order(you, lambda x, y: x >  y)
+  def __ge__(me, you): return me._order(you, lambda x, y: x >= y)
 
 class IntRat (BaseRat):
   RING = MP
@@ -657,11 +665,11 @@ _augment(Key, _tmp)
 class _tmp:
   def __repr__(me):
     return '%s({%s})' % (_clsname(me),
-                         ', '.join(['%r: %r' % kv for kv in me.iteritems()]))
+                         ', '.join(['%r: %r' % kv for kv in _iteritems(me)()]))
   def _repr_pretty_(me, pp, cyclep):
     ind = _pp_bgroup_tyname(pp, me)
     if cyclep: pp.text('...')
-    else: _pp_dict(pp, me.iteritems())
+    else: _pp_dict(pp, _iteritems(me))
     pp.end_group(ind, ')')
 _augment(KeyAttributes, _tmp)
 
@@ -705,11 +713,11 @@ _augment(KeyDataECPt, _tmp)
 class _tmp:
   def __repr__(me):
     return '%s({%s})' % (_clsname(me),
-                         ', '.join(['%r: %r' % kv for kv in me.iteritems()]))
+                         ', '.join(['%r: %r' % kv for kv in _iteritems(me)]))
   def _repr_pretty_(me, pp, cyclep):
     ind = _pp_bgroup_tyname(pp, me, '({ ')
     if cyclep: pp.text('...')
-    else: _pp_dict(pp, me.iteritems())
+    else: _pp_dict(pp, _iteritems(me))
     pp.end_group(ind, ' })')
 _augment(KeyDataStructured, _tmp)
 
@@ -1009,11 +1017,11 @@ class Ed448Priv (_EdDSAPriv, Ed448Pub):
 
 class _tmp:
   def __repr__(me):
-    return '{%s}' % ', '.join(['%r: %r' % kv for kv in me.iteritems()])
+    return '{%s}' % ', '.join(['%r: %r' % kv for kv in _iteritems(me)])
   def _repr_pretty_(me, pp, cyclep):
     ind = _pp_bgroup(pp, '{ ')
     if cyclep: pp.text('...')
-    else: _pp_dict(pp, me.iteritems())
+    else: _pp_dict(pp, _iteritems(me))
     pp.end_group(ind, ' }')
 _augment(_base._MiscTable, _tmp)