initial commit

README.md

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+### Generating a file
+
+1. `head -c 8 </dev/zero >myfile`
+2. `head -c 16M </dev/random >>myfile`
+
+You can repeat the second command to grow the file

main.py

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+from dataclasses import dataclass
+from io import BufferedRandom
+
+@dataclass
+class Shard:
+    size: int
+    file: BufferedRandom
+
+    @staticmethod
+    def load_shard(filename: str) -> 'Shard':
+        file = open(filename, 'rb+')
+        size = int.from_bytes(file.read(8), 'big')
+
+        return Shard(size, file)
+
+@dataclass
+class Entry:
+    shard: Shard
+
+    content: bytearray
+
+
+
+shart = Shard.load_shard('myfile')
+print(shart.size)

notes.txt

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+the idea:
+there's one big file (diary)
+its size is set on creation and constant
+its filled with random data
+the file begins with a long which is total length of the diary, encrypt
+inside it there are entries:
+- timestamp
+- start index of previous entry (encrypted of course)
+- length of data
+- data
+you can't edit data if there's a newer entry
+each entry is encrypted
+
+there's also an index file:
+- total length of diary
+-