Notepad Tab File Types

• File Tab (Saved Tab)
• Unsaved Tab
• 0.bin
• 1.bin

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Template:

• [sizeInBytes] dataType Short Description / Title Example Bytes
  • Additional Observations

Notices:

• For convenience sake I will denote ULEB128 as ul
• The hexpat file has more detailed records with bundled data-types. Eg. a struct containing the Start and End for selection indexes.

File Tab

The Pattern for this type can be found here

[~] = Undefined Length / Defined at runtime

• [2] char[2] Magic Numbers / Header Identifier NP
• [1-16] ul Unsaved Sequence Number (Reserved for 0.bin and 1.bin files) 00
• [1] bool IsSaved (The Tab) 00 / 01

If IsSaved:

• [~] string16 Saved File Path
• [1-16] ul Saved Tab Content Length
• [1] enum EncodingTypes Encoding Type UTF-8
• [1] enum EOLSequenceType Line Carriage Type CRLF (Windows)
• [1-16] ul FileTime D2 EC E8 C2 D8 AF 9C ED 01
  • Increments from Left to Right
  • 9 bytes
• [32] u8[32] SHA-256 of the File's Content
• [2] u8[2] Possible Selection Start Delimiter 00 01

Else:

• [1] u8 Possible Selection Start Delimiter 01

• [1-16] ul Selection Start Index
• [1-16] ul Selection End Index
• [1] bool WordWrap 00 / 01
• [1] bool Right To Left 00 / 01
• [1] bool Show Unicode Control 00 / 01
• [1] u8 Unknown (Likely bool) 00
• [~] string16 Content
• [1] bool Has Unsaved Content 00 / 01
  • False on Saved File
  • True on Unsaved File
  • False on Unsaved File with Chunks
  • True on saved file with unsaved content
• [4] u8[4] CRC of all content from after the Header Identifier up to here
• [~] UnsavedChunk[~] Remaining unsaved chunks of user input (Additions or Deletions)
  • Thanks to ogmini

Unsaved Chunk

[~] = Undefined Length / Defined at runtime

• [1-16] ul Cursor Position
• [1-16] ul Number of Characters Deleted
• [~] string16 Characters Added
• [4] u32 CRC of all content of the chunk up to here