add dcd.bit.Bitfield and related goodies

dcd/aux.py

@@ -18,6 +18,20 @@ def flatten_dict(root, glue=" ", prefix=[]):
 
 # ----------------------------------------------------------------
 
+def clamp(A, low, high):
+	"""
+	Clamps integer A to <low; high>
+	"""
+	
+	if A < low:
+		return low
+	elif A > high:
+		return high
+	else:
+		return A
+
+# ----------------------------------------------------------------
+
 import random
 
 PASSPHRASE_VOWELS = "aeiuAEU"
@@ -50,34 +64,6 @@ def hash_password(p, hexdigest=True):
 
 # ----------------------------------------------------------------
 
-def raw_to_hex(raw, separator=" "):
-	"""
-	Converts a bytearray (or bytes) into its textual hexadecimal representation.
-	"""
-	
-	output = []
-	
-	for o in raw:
-		output.append(hex(o)[2:].zfill(2))
-	
-	return separator.join(output)
-
-def hex_to_raw(text, separator=" "):
-	"""
-	Converts a hexadecimal representation of a byte array into a bytearray.
-	"""
-	
-	output = []
-	
-	text = text.replace(separator, "")
-	
-	for i in range(len(text)//2):
-		output.append(int(text[2*i:2*i+2], 16))
-	
-	return bytearray(output)
-
-# ----------------------------------------------------------------
-
 class DeleteOverlay:
 	pass