added library abstraction for conversion

1 files changed, 29 insertions, 0 deletions

diff --git a/final/rsautils.py b/final/rsautils.py
new file mode 100644
index 0000000..236571c
--- /dev/null
+++ b/final/rsautils.py
@@ -0,0 +1,29 @@
+def list2int(arr,base,endian="little"):
+  if endian == "big":
+    arr.reverse()
+  out = 0
+  for num in arr:
+    out *= base
+    out += num
+  return out
+
+def int2list(num,base,endian="little"):
+  arr = []
+  while num > 0:
+    arr.append(num%base)
+    num = num//base
+  if endian == "little":
+    arr.reverse()
+  return arr
+
+def int2string(num):
+  return ''.join([chr(charval) for charval in int2list(num,128)])
+
+def string2int(string,endian="little"):
+  return list2int([ord(char) for char in string],128,endian=endian)
+
+def int2base64(num):
+  return ''.join([chr(charval+32) for charval in int2list(num,64)])
+
+def base642int(code):
+  return list2int([ord(char)-32 for char in code],64)