added some ideas and started on problem text

README.md

-### Ideas:
-1. fix null values being invalid
+# INF113 Obligatorisk Innlevering 3 - Eget filsystem i Python
+
\ No newline at end of file
+## Utlevert kode
+
+I denne oppgaven får dere utlevert kode som simulerer et enkelt filsystem. Kjør ´``main.py`` for å generere filsystemet med noen eksempelfiler.
+
+Filsystemet er som helhet lagret i en fil ``myfilesystem.fs`` og har headers, blokker osv. Les kommentarer og dokumentasjon i koden for å forstå koden bedre. Det er også mulig å åpne filsystemet som rå data ved å bruke kommando ``xxd myfilesystem.fs`` i terminal. Da vil du se en oversikt over filsystemet i hexadesimalt format.
+
+## Oppgave 1: 
+
+# Ideas:
+
+- Remove() should free the space taken by the file. New files should use the new free space if available instead of following the incremented block number.
+- Load() should allow files to have \0 characters in them. 
+- Implement ls() to see all the files in the directory
+- allow file sizes of multiple blocks?
+    - problem is perhaps recording that the extra blocks are taken since they probably wont be associated with a filename
+    - require change in most of the code?, so large task
+
+## Todo:
+- Add explanation of how the file system works in intro text?

myfs.py

@@ -3,19 +3,15 @@ import sys
 # file system parameters
 TOTAL_SIZE = 0x800 # 2kB
 
+# Metainfo block
 HEADER_START = 0x0
+# 1 byte counter for the number of files
 COUNTER_BYTES = 0x1
+# size of file info entry (filename, ...)
 FILE_ENTRY_SIZE = 0x10
-
+# size of a file block (content of a file)
 FILE_BLOCK_SIZE = 0x100
 
-# file block 0 is the metainfo block
-# line 0 of metainfo contains the number of files
-# lines 1.. contain the filenames. 
-#     line N has the filename of the file in Block N
-
-# file blocks 1.. contain just the file contents
-
 # use "xxd myfilesystem.fs" to look at the raw contents
 
 # internal exception to signal no file
@@ -25,7 +21,7 @@ class NoFile(Exception):
 
 def format(f):
     """
-    Formats the file system
+    Formats the file system by writing the initial metadata.
     """
     f.write(b'\0' * TOTAL_SIZE)