/// <summary>
/// Writes data to a reflexive, reallocating the original.
/// </summary>
/// <param name="entries">The entries to write.</param>
/// <param name="oldCount">The old count.</param>
/// <param name="oldAddress">The old address.</param>
/// <param name="newCount">The number of entries to write.</param>
/// <param name="layout">The layout of the data to write.</param>
/// <param name="metaArea">The meta area of the cache file.</param>
/// <param name="allocator">The cache file's meta allocator.</param>
/// <param name="stream">The stream to manipulate.</param>
/// <returns>The address of the new reflexive, or 0 if the entry list is empty and the reflexive was freed.</returns>
public static uint WriteReflexive(IEnumerable <StructureValueCollection> entries, int oldCount, uint oldAddress,
int newCount, StructureLayout layout, FileSegmentGroup metaArea, MetaAllocator allocator, IStream stream)
{
if (newCount == 0)
{
// Free the old reflexive and return
if (oldCount > 0 && oldAddress != 0)
{
allocator.Free(oldAddress, oldCount * layout.Size);
}
return(0);
}
uint newAddress = oldAddress;
if (newCount != oldCount)
{
// Reallocate the reflexive
int oldSize = oldCount * layout.Size;
int newSize = newCount * layout.Size;
if (oldCount > 0 && oldAddress != 0)
{
newAddress = allocator.Reallocate(oldAddress, oldSize, newSize, stream);
}
else
{
newAddress = allocator.Allocate(newSize, stream);
}
}
// Write the new values
WriteReflexive(entries.Take(newCount), newAddress, layout, metaArea, stream);
return(newAddress);
}
/// <summary>
/// Writes data to a block, reallocating the original.
/// </summary>
/// <param name="elements">The entries to write.</param>
/// <param name="oldCount">The old count.</param>
/// <param name="oldAddress">The old address.</param>
/// <param name="newCount">The number of entries to write.</param>
/// <param name="layout">The layout of the data to write.</param>
/// <param name="metaArea">The meta area of the cache file.</param>
/// <param name="allocator">The cache file's meta allocator.</param>
/// <param name="stream">The stream to manipulate.</param>
/// <returns>The address of the new tag block, or 0 if the entry list is empty and the tag block was freed.</returns>
public static long WriteTagBlock(IEnumerable <StructureValueCollection> elements, int oldCount, long oldAddress,
int newCount, StructureLayout layout, FileSegmentGroup metaArea, MetaAllocator allocator, IStream stream)
{
if (newCount == 0)
{
// Free the old block and return
if (oldCount > 0 && oldAddress != 0)
{
allocator.Free(oldAddress, oldCount * layout.Size);
}
return(0);
}
long newAddress = oldAddress;
if (newCount != oldCount)
{
// Reallocate the block
int oldSize = oldCount * layout.Size;
int newSize = newCount * layout.Size;
if (oldCount > 0 && oldAddress != 0)
{
newAddress = allocator.Reallocate(oldAddress, oldSize, newSize, stream);
}
else
{
newAddress = allocator.Allocate(newSize, stream);
}
}
// Write the new values
WriteTagBlock(elements.Take(newCount), newAddress, layout, metaArea, stream);
return(newAddress);
}
private void SaveBitArray(BitArray bits, string countName, string addressName, MetaAllocator allocator, IStream stream, ReflexiveCache<int> cache, StructureValueCollection values)
{
if (bits.Length == 0)
{
values.SetInteger(countName, 0);
values.SetInteger(addressName, 0);
return;
}
var ints = new int[((bits.Length + 31) & ~31)/32];
bits.CopyTo(ints, 0);
// If the address isn't cached, then allocate space and write a new array
uint newAddress;
if (!cache.TryGetAddress(ints, out newAddress))
{
newAddress = allocator.Allocate(ints.Length*4, stream);
stream.SeekTo(_metaArea.PointerToOffset(newAddress));
foreach (int i in ints)
stream.WriteInt32(i);
cache.Add(newAddress, ints);
}
values.SetInteger(countName, (uint)ints.Length);
values.SetInteger(addressName, newAddress);
}
/// <summary>
/// Writes data to a reflexive, reallocating the original.
/// </summary>
/// <param name="entries">The entries to write.</param>
/// <param name="oldCount">The old count.</param>
/// <param name="oldAddress">The old address.</param>
/// <param name="newCount">The number of entries to write.</param>
/// <param name="layout">The layout of the data to write.</param>
/// <param name="metaArea">The meta area of the cache file.</param>
/// <param name="allocator">The cache file's meta allocator.</param>
/// <param name="stream">The stream to manipulate.</param>
/// <returns>The address of the new reflexive, or 0 if the entry list is empty and the reflexive was freed.</returns>
public static uint WriteReflexive(IEnumerable<StructureValueCollection> entries, int oldCount, uint oldAddress,
int newCount, StructureLayout layout, FileSegmentGroup metaArea, MetaAllocator allocator, IStream stream)
{
if (newCount == 0)
{
// Free the old reflexive and return
if (oldCount > 0 && oldAddress != 0)
allocator.Free(oldAddress, oldCount*layout.Size);
return 0;
}
uint newAddress = oldAddress;
if (newCount != oldCount)
{
// Reallocate the reflexive
int oldSize = oldCount*layout.Size;
int newSize = newCount*layout.Size;
if (oldCount > 0 && oldAddress != 0)
newAddress = allocator.Reallocate(oldAddress, oldSize, newSize, stream);
else
newAddress = allocator.Allocate(newSize, stream);
}
// Write the new values
WriteReflexive(entries.Take(newCount), newAddress, layout, metaArea, stream);
return newAddress;
}
