public static void AddBlock()
{
if (NumBlocks < ArrayNumBlocks)
{
Memblocks[NumBlocks++] = null;
}
else
{
V8MemBlock[] mb = new V8MemBlock[ArrayNumBlocks + Delta];
for (uint i = 0; i < ArrayNumBlocks; i++)
{
mb[i] = Memblocks[i];
}
for (uint i = ArrayNumBlocks; i < ArrayNumBlocks + Delta; i++)
{
mb[i] = null;
}
ArrayNumBlocks += Delta;
Memblocks = null;
Memblocks = mb;
}
}
public static void CreateMemblocks(UInt32 _numblocks)
{
NumBlocks = _numblocks;
ArrayNumBlocks = (NumBlocks / Delta + 1) * Delta;
Memblocks = new V8MemBlock[ArrayNumBlocks];
//memset(memblocks, 0, array_numblocks * sizeof(MemBlock*));
}
public bool Getblock(ref byte[] buf, UInt32 block_number, Int32 blocklen = -1) // буфер принадлежит вызывающей процедуре
{
if (Data1CD == null)
{
return(false);
}
if (blocklen < 0)
{
blocklen = (Int32)Pagesize;
}
if (block_number >= length)
{
Console.WriteLine($"Попытка чтения блока за пределами файла. Индекс блока {block_number}, всего блоков {length}");
return(false);
}
//memcpy(buf, MemBlock::getblock(fs, block_number), blocklen);
V8MemBlock tmp_mem_block = new V8MemBlock((FileStream)Data1CD, block_number, false, true);
byte[] tmp_buf = V8MemBlock.GetBlock((FileStream)Data1CD, block_number);
Array.Copy(tmp_buf, buf, blocklen);
return(true);
}
public static byte[] GetBlock(FileStream fs, UInt32 _numblock)
{
if (_numblock >= NumBlocks)
{
return(null);
}
if (Memblocks[_numblock] != null)
{
V8MemBlock tmpV8Mem = new V8MemBlock(fs, _numblock, false, true);
}
return
(Memblocks[_numblock].GetBlock(false));
}
public byte[] Getblock(UInt32 block_number)
{
if (Data1CD == null)
{
return(null);
}
if (block_number >= length)
{
Console.WriteLine($"Попытка чтения блока за пределами файла. Индекс блока {block_number}. Всего блоков {length}");
return(null);
}
V8MemBlock tmpV8MemBlock = new V8MemBlock((FileStream)Data1CD, block_number, false, true);
return(V8MemBlock.GetBlock((FileStream)Data1CD, block_number));
}
public static byte[] GetBlockForWrite(FileStream fs, UInt32 _numblock, bool read)
{
if (_numblock > NumBlocks)
{
return(null);
}
if (_numblock == NumBlocks)
{
AddBlock();
}
if (Memblocks[_numblock] != null)
{
V8MemBlock tmpV8Mem = new V8MemBlock(fs, _numblock, true, read);
}
else
{
Memblocks[_numblock].IsChanged = true;
}
return
(Memblocks[_numblock].GetBlock(true));
}
/*
* public bool get_readonly()
* {
* return readonly_;
* }
*
* public void set_readonly(bool ro)
* {
* readonly_ = ro;
* }
*/
public void Flush()
{
V8MemBlock.Flush();
}