Small problem Reading file

[MemoreX]

Hello,

I recently started C# coding and I think i've done a pretty good job uptill now but I got stuck when trying to read a filetype called QSD.

It has this in it:


:FOREACH( condition_count )
DWORD length
DWORD command
BYTE[length - 8] data
:ENDFOR

:FOREACH( action_count )
DWORD length
DWORD command
BYTE[length - 8] data
:ENDFOR


I know how to read the Length and command DWORDs but not how to read that BYTE. I don't understand what I need to do with the Length-8 thing.

Can someone please explain?

[someuser77]

Well I am not familiar with the QSD file structure but if you are using the BinaryReader class you can use the ReadBytes method which takes the number of bytes to read, which will be the value you got from length minus 8 because you already got 4 bytes with the length and 4 bytes with the command.

[MemoreX]

here this is what I have uptil now:

<Structure of QSD file>
      DWORD file_version
      DWORD block_count
      SSTR qsd_name
      :FOREACH( block_count )
          DWORD record_count
          SSTR block_name
          :FOREACH( record_count )
              BYTE check_next
              DWORD condition_count
              DWORD action_count
              SSTR record_name
              :FOREACH( condition_count )
                  DWORD length
                  DWORD command
                  BYTE[length - 8] data
              :ENDFOR
              :FOREACH( action_count )
                  DWORD length
                  DWORD command
                  BYTE[length - 8] data
              :ENDFOR
          :ENDFOR
      :ENDFOR

And this is what I have sofar:

        public class QSDConditions
        {
            public int length;
            public int command;
            public byte[] data;
        }

public void OpenQSD(string filePath)
        {
            FilePath = filePath;

            BinaryReader fh = new BinaryReader(File.OpenRead(FilePath));

            //Basic info. Maybe usefull to display later?
            fileversion =  fh.ReadInt32();
            // This is just the basis info and allows us to start.
            BlockCount = fh.ReadInt32();
            QSDname = Encoding.GetEncoding("EUC-KR").GetString(fh.ReadBytes(fh.ReadInt16())).Trim("\0");

            blocks = new List<QSDBlocks>(BlockCount);

            //oke first ForEach 
            for (int i = 0; i < BlockCount; i++)
            {
                blocks.Add(new QSDBlocks()
                {
                    record_count = fh.ReadInt32(),
                    blockname = Encoding.GetEncoding("EUC-KR").GetString(fh.ReadBytes(fh.ReadInt16())).Trim("\0")
                });

                int recordcount = blocks[i].record_count;
                blocks[i].records = new List<QSDRecords>(blocks[i].record_count);

                //Records now for each block. Unsure about the LIST<> though.
                for (int j = 0; j < recordcount; j++)
                {
                    blocks[i].records.Add(new QSDRecords()
                    {
                        check_next = fh.ReadByte(),
                        condition_count = fh.ReadInt32(),
                        action_count = fh.ReadInt32(),
                        record_name = Encoding.GetEncoding("EUC-KR").GetString(fh.ReadBytes(fh.ReadInt16())).Trim("\0")

                    });

                    int conditioncount = blocks[i].records[j].condition_count;
                    int actioncount = blocks[i].records[j].action_count;

                    blocks[i].records[j].Conditions = new List<QSDConditions>(blocks[i].records[j].condition_count);

                    //Quest Conditions reader
                    for (int k = 0; k < conditioncount; k++)
                    {
                        blocks[i].records[j].Conditions.Add(new QSDConditions()
                        {
                            length = fh.ReadInt32(),
                            command = fh.ReadInt32(),
                            data = 
                                

                        });
                    }

                }

            }

I havent continued since I ran stuck on the data. I didnt paste evrything but I think I copied all that is important.

[MemoreX]

Alright, I found the problem was quite obvious now I looked at it...


[Length - 8]

Length is 32 Bytes.

Length - 8 = 24 bytes.

So i just had to do

ReadBytes(24)

Thanks Someuser didnt think of something that easy actually.

Now I just need to find a way to read OpCodes/Transfer int into OpCodes