/// <summary>
/// Serialize all fields to object fields space
/// Free excessive chunks if needed
/// </summary>
private void serialize()
{
// If no fields
if (FCache.Count == 0)
{
set_alloc(ALLOC_RESET);
FIELDS_SIZE = 0;
FreeSpace = -1;
FCache = null;
return;
}
byte[] b = null;
int old_size = (int)(FIELDS_SIZE); // Current used size (number of fields + all fields size)
// 1. Calculate new size
int new_size = FIRST_FIELD_OFFSET_REL;
for (int i = 0; i < FCache.Count; i++)
{
new_size += FCache[i].FULL_LENGTH;
}
// 2. Check if space is availabe, extend if required
if (new_size > (old_size + FreeSpace))
{
sp.Extend(this, (new_size - old_size));
}
// 3. Check if only value update is required
List <FieldCache> afc = FCache;
FCache = new List <FieldCache>(32);
int array_size = (new_size > old_size) ? new_size : old_size;
byte[] data = new byte[array_size];
int data_pos = FIRST_FIELD_OFFSET_REL;
VSLib.CopyBytes(data, VSLib.ConvertIntToByte(new_size), FIELDS_SIZE_POS, FIELDS_SIZE_LEN); // Size
VSLib.CopyBytes(data, VSLib.ConvertShortToByte((short)afc.Count), FIELDS_NUMBER_POS, FIELDS_NUMBER_LEN); // Fields number
FCache.Clear();
for (int i = 0; i < afc.Count; i++)
{
FieldCache fc_element = afc[i];
if (!fc_element.DELETED)
{
fc_element.OFFSET = data_pos;
// Type
data[data_pos] = fc_element.TYPE;
data_pos++;
// Name length
data[data_pos] = (byte)(fc_element.NAME.Length);
data_pos++;
// Name
b = VSLib.ConvertStringToByte(fc_element.NAME);
VSLib.CopyBytes(data, b, data_pos, b.Length);
data_pos += b.Length;
// Value
if (FIELD_COMPRESS[fc_element.TYPE]) // int/long/decimal
{
data[data_pos] = (byte)(fc_element.LENGTH);
data_pos++;
}
else if ((fc_element.TYPE == FIELD_TYPE_BYTES) | (fc_element.TYPE == FIELD_TYPE_STRING))
{
b = compress(VSLib.ConvertLongToByte(fc_element.LENGTH), FIELD_TYPE_LONG);
data[data_pos] = (byte)b.Length;
data_pos++;
if (b.Length > 0)
{
VSLib.CopyBytes(data, b, data_pos, b.Length);
data_pos += b.Length;
}
}
// Write value
if (fc_element.VALUE.Length > 0)
{
VSLib.CopyBytes(data, fc_element.VALUE, data_pos, fc_element.VALUE.Length);
data_pos += afc[i].LENGTH;
}
// Shift offset and add to cache
fc_element.OLDLENGTH = afc[i].LENGTH;
fc_element.STATE = STATE_LOADED;
FCacheTree.Insert(fc_element.NAME, FCache.Count);
FCache.Add(fc_element);
}
}
base.Write(base.FIXED, data, data.Length);
set_alloc(ALLOC_RENEW);
// Fill the rest by zeros if le length < old length
if (new_size < old_size)
{
long full_used_size = base.FIXED + new_size;
b = new byte[old_size - new_size];
base.Write(full_used_size, b, b.Length); // Fill be zeros unused space
// Multiple chunks, chech if there are exessive
if (base.Chunk > 0)
{
sp.ShrinkObject(this, full_used_size);
}
}
FreeSpace = (int)(this.Size - base.FIXED - new_size);
}
/// <summary>
/// Create new KEY for address
/// If use_key > 0 then add specified key (used by restore)
/// If alloc=null - add 0 address (restore)
/// </summary>
/// <returns>new SID</returns>
public long Add(VSAllocation alloc, long use_key = 0)
{
//VSDebug.StopPoint(alloc.Address, 45724);
long address = (alloc == null) ? 0 : alloc.DescriptorAddress;
long addr = 0;
// 1. Generate new key
if (use_key > 0)
{
if (use_key <= KeyHeader.LastKey)
{
throw new VSException(DEFS.E0023_INVALID_KEY_SEQUENCE_CODE, " Lask key: " + KeyHeader.LastKey.ToString() + " Use key: " + use_key.ToString());
}
KeyHeader.LastKey = use_key;
}
else
{
KeyHeader.LastKey++;
}
// Write new key
KeyHeaderAlloc.Write(KeyHeaderDef.A_LastKey, KeyHeader.LastKey);
// Lookup place to add
KeyBlockAllocWrite = null;
if (KeyHeader.DescriptorLast >= 0)
{
if (KeyHeader.LastKey < (KeyDescriptor[KeyHeader.DescriptorLast].FirstKey + KeyBlockDef.BLOCK_LENGTH))
{
KeyBlockAllocWrite = sp.GetAllocationByDescriptor(KeyDescriptor[KeyHeader.DescriptorLast].Address);
}
}
// Not found, allocate new block
if (KeyBlockAllocWrite == null)
{
KeyBlockAllocWrite = sp.AllocateSpace(KeyBlockDef.BLOCK_SIZE, DEFS.POOL_KEY, generateID: false);
byte[] b = new byte[KeyBlockDef.BLOCK_SIZE];
// Fill all by -1
for (int i = 0; i < KeyBlockDef.BLOCK_SIZE; i++)
{
b[i] = 255;
}
KeyBlockAllocWrite.Write(0, b, b.Length);
KeyHeader.DescriptorLast++;
KeyHeader.DescriptorUsed++;
KeyHeaderAlloc.Write(KeyHeaderDef.A_DescriptorLast, KeyHeader.DescriptorLast);
KeyHeaderAlloc.Write(KeyHeaderDef.A_DescriptorUsed, KeyHeader.DescriptorUsed);
// Extend if required
if (KeyHeader.DescriptorLast == KeyHeader.DescriptorLength)
{
sp.Extend(KeyHeaderAlloc, KeyDescriptorDef.DESCRIPTOR_CHUNK_SIZE);
KeyHeader.DescriptorLength += KeyDescriptorDef.DESCRIPTOR_CHUNK_LENGTH;
KeyHeaderAlloc.Write(KeyHeaderDef.A_DescriptorLength, KeyHeader.DescriptorLength);
}
KeyDescriptor[KeyHeader.DescriptorLast].FirstKey = KeyHeader.LastKey;
KeyDescriptor[KeyHeader.DescriptorLast].Address = KeyBlockAllocWrite.DescriptorAddress;
KeyDescriptor[KeyHeader.DescriptorLast].Used = 0;
addr = KeyHeader.DescriptorLast * KeyDescriptorDef.DESCRIPTOR_ITEM_LENGTH;
KeyDescriptorAlloc.Write(addr + KeyDescriptorDef.A_Address, KeyDescriptor[KeyHeader.DescriptorLast].Address);
KeyDescriptorAlloc.Write(addr + KeyDescriptorDef.A_FirstKey, KeyDescriptor[KeyHeader.DescriptorLast].FirstKey);
}
// Write to block
KeyBlockAllocWrite = sp.GetAllocationByDescriptor(KeyDescriptor[KeyHeader.DescriptorLast].Address);
addr = ((KeyHeader.LastKey - KeyDescriptor[KeyHeader.DescriptorLast].FirstKey) * KeyBlockDef.BLOCK_ITEM_LENGTH);
KeyBlockAllocWrite.Write(addr + KeyBlockDef.A_Address, address);
// Update used
KeyDescriptor[KeyHeader.DescriptorLast].Used++;
KeyDescriptorAlloc.Write((KeyHeader.DescriptorLast * KeyDescriptorDef.DESCRIPTOR_ITEM_LENGTH) + KeyDescriptorDef.A_Used, KeyDescriptor[KeyHeader.DescriptorLast].Used);
// Set read cache
KeyBlockAllocRead = KeyBlockAllocWrite;
KeyBlockReadIndex = KeyHeader.DescriptorLast;
// Return key
return(KeyHeader.LastKey);
}
