/// <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);
}
/// <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;
}
private static void FreeBitArray(StructureValueCollection values, string countName, string addressName, MetaAllocator allocator)
{
if (!values.HasInteger(countName) || !values.HasInteger(addressName))
return;
var oldCount = (int)values.GetInteger(countName);
uint oldAddress = values.GetInteger(addressName);
if (oldCount > 0 && oldAddress > 0)
allocator.Free(oldAddress, oldCount*4);
}
