TBank not clean always at creation?
BlitzMax Forums/BlitzMax Beginners Area/TBank not clean always at creation?
| ||
| I've always expected a memory bank to be 'empty' (filled with 0's) when you create or even re-size it. And I always used them as such - without problem (B3D & BMax). But currently it seems that TBanks aren't always 'clean' to start with, but could have 'random data' in them: See the example code below.. Has this always been so (am I going crazy? ;) or is this a bug or 'new feature' of some sort? I'm using BMax 1.41.. Cheers, Danny Local bank:TBank = CreateBank(1000) Local numDirty% = 0 For Local i% = 0 To bank.Size() -1 If bank.PeekByte(i) <> 0 Then numDirty :+ 1 Next DebugLog "Done: " +numDirty+" / 1000 dirty bytes encountered" WaitKey() End |
| ||
| Then what is the quickest way of clearing (filling with 0's) a bank? I found that PokeLong works about 4 to 5 times faster than using PokeByte to the same effect.. D. |
| ||
| PokeInt should be faster? |
| ||
Maybe something like:MemClear(bank.Lock(), bank.Size()) bank.Unlock() |
| ||
| If you are not going to read any data from the bank before writing data to it, then you don't need to clear it. For example, if you are storing a file into the bank then there is no point to zero-ing it first as the junk will be overwritten. You could try using an array instead. Blitz arrays are zeroed automatically. |
| ||
| @CZar: I use the bank for (new) level data, so I expected things to be clear (0) at first. @Ole JR: Good tip - this is indeed a super fast method, cheers! Last edited 2011 |
   |