Initial YakPanel commit

class/public/varint_encoder.py

@@ -0,0 +1,31 @@
+import struct
+
+
+# varint编码 -> bytes
+def _varint_encode(num):
+    res = b''
+
+    while num > 127:
+        res += struct.pack('B', 0x80 | (num & 0x7f))
+        num >>= 7
+
+    res += struct.pack('B', num)
+
+    return res
+
+
+# varint解码 -> num, length
+def _varint_decode(bs):
+    res = 0
+    n = 0
+    for shift in range(0, 64, 7):
+        if n > len(bs) - 1:
+            break
+
+        res |= (bs[n] & 0x7f) << shift
+        if (bs[n] & 0x80) == 0:
+            break
+
+        n += 1
+
+    return res, n + 1