Refined codec: base

dhondta · dhondta · commit 3ff514756f9c · 2021-10-16T22:29:08.000+02:00
diff --git a/README.md b/README.md
@@ -171,7 +171,7 @@ o
 `atbash` | text <-> Atbash ciphertext | aka Atbash Cipher
 `bacon` | text <-> Bacon ciphertext | aka Baconian Cipher
 `barbie-N` | text <-> barbie ciphertext | aka Barbie Typewriter (N belongs to [1, 4])
-`baseXX` | text <-> baseXX | see [base encodings](https://python-codext.readthedocs.io/en/latest/enc/base.html)
+`baseXX` | text <-> baseXX | see [base encodings](https://python-codext.readthedocs.io/en/latest/enc/base.html) (incl base32, 36, 45, 58, 62, 63, 64, 91, 100, 122)
 `baudot` | text <-> Baudot code bits | supports CCITT-1, CCITT-2, EU/FR, ITA1, ITA2, MTK-2 (Python3 only), UK, ...
 `bcd` | text <-> binary coded decimal text | encodes characters from their (zero-left-padded) ordinals
 `braille` | text <-> braille symbols | Python 3 only
diff --git a/codext/base/base91.py b/codext/base/base91.py
@@ -53,7 +53,6 @@ def encode(text, errors="strict"):
                 else:
                     bits += "0" * (13 - len(bits))
                     n = int(bits, 2)
-                    print(bits, n)
                     s += b91[n // 91] + b91[n % 91]
         else:
             for c in t:
diff --git a/codext/base/baseN.py b/codext/base/baseN.py
@@ -59,6 +59,10 @@
 base(B62, r"^base[-_]?62(|[-_]inv(?:erted)?)$")
 
 
+B63 = {'': upper + lower + digits + "$", 'inv': lower + upper + digits + "$"}
+base(B63, r"^base[-_]?63(|[-_]inv(?:erted)?)$")
+
+
 B64 = {
     r'':                        upper + lower + digits + "+/",
     r'[-_]inv(erted)?$':        lower + upper + digits + "+/",
diff --git a/docs/enc/base.md b/docs/enc/base.md
@@ -62,8 +62,12 @@ Note that for `base64`, it overwrites the native `base64_codec` to also support
 :---: | :---: | --- | ---
 `base3` | text <-> Base3 encoded text | `base[-_]?36(|[-_]inv(erted)?)` | 
 `base36` | text <-> Base36 encoded text | `base[-_]?36(|[-_]inv(erted)?)` | 
+`base45` | text <-> Base45 encoded text | `base[-_]?45(|[-_]inv(erted)?)` | 
 `base58` | text <-> Base58 encoded text | `base[-_]?58(|[-_](bc|bitcoin|rp|ripple|fl|flickr|short[-]?url|url))` | supports Bitcoin, Ripple and short URL
 `base62` | text <-> Base62 encoded text | `base[-_]?62(|[-_]inv(erted)?)` | 
+`base63` | text <-> Base63 encoded text | `base[-_]?63(|[-_]inv(erted)?)` | 
+`base91` | text <-> Base91 encoded text | `base[-_]?91(|[-_]inv(erted)?)` | 
+`base91-alt` | text <-> Alternate Base91 encoded text | `base[-_]?91[-_]alt(?:ernate)?(|[-_]inv(erted)?)` | Another version of Base91
 
 ```python
 >>> codext.encode("test", "base3")
@@ -77,6 +81,13 @@ Note that for `base64`, it overwrites the native `base64_codec` to also support
 'this is a test'
 ```
 
+```python
+>>> codext.encode("this is a test!", "base45")
+'AWE+EDH44.OEOCC7WE QEX0'
+>>> codext.decode('AWE+EDH44.OEOCC7WE QEX0', "base45")
+'this is a test!'
+```
+
 ```python
 >>> codext.encode("this is a test", "base58")
 'jo91waLQA1NNeBmZKUF'
@@ -93,6 +104,13 @@ Note that for `base64`, it overwrites the native `base64_codec` to also support
 'CsoB4HQ5gmgMyCenF7E'
 ```
 
+```python
+>>> codecs.encode("This is a test !", "base91")
+'nX,<:WRT%yxth90oZB^C'
+>>> codext.encode("This is a test !", "base91-alt")
+'?a&[jv4S3Wg>,71@Jo#K'
+```
+
 !!! note "Generic encodings"
     
     Base encodings are available for any N other than the ones explicitely specified using the "`-generic`" suffix. Their charsets consist of printable characters from the `string` module for N up to 100 and for characters composed from the 256 possible ordinals for a greater N.
