add the ulibs

lib/micro_base64.py

@@ -0,0 +1,55 @@
+class Base64:
+    def __init__(self):
+        # Base64 alphabet
+        self.alphabet = (
+            "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"
+        )
+
+    def encode(self, data: str) -> str:
+        # Convert string to bytes and get binary representation
+        binary = "".join([format(b, "08b") for b in data.encode()])
+
+        # Pad with zeros if necessary
+        padding = len(binary) % 6
+        if padding:
+            binary += "0" * (6 - padding)
+
+        # Split into 6-bit chunks and convert to decimal
+        chunks = [binary[i : i + 6] for i in range(0, len(binary), 6)]
+        result = "".join(self.alphabet[int(chunk, 2)] for chunk in chunks)
+
+        # Add padding characters
+        padding = len(data) % 3
+        if padding:
+            result += "=" * (3 - padding)
+
+        return result
+
+    def decode(self, data: str) -> str:
+        # Remove padding characters
+        data = data.rstrip("=")
+
+        # Convert to binary
+        binary = "".join([format(self.alphabet.index(c), "06b") for c in data])
+
+        # Remove padding zeros
+        padding = len(binary) % 8
+        if padding:
+            binary = binary[:-padding]
+
+        # Convert binary to bytes and then to string
+        bytes_data = [int(binary[i : i + 8], 2) for i in range(0, len(binary), 8)]
+        return bytes(bytes_data).decode()
+
+
+# Example usage
+def example():
+    b64 = Base64()
+    original = "Hello, World!"
+    encoded = b64.encode(original)
+    print(f"Original: {original}")
+    print(f"Encoded: {encoded}")
+
+
+if __name__ == "__main__":
+    example()