public static void Fill(this IStorage input, byte value, long offset, long count, IProgressReport progress = null)
{
const int threshold = 0x400;
if (count > threshold)
{
input.FillLarge(value, offset, count, progress);
return;
}
Span <byte> buf = stackalloc byte[(int)count];
buf.Fill(value);
input.Write(buf, offset);
}
private static void FillLarge(this IStorage input, byte value, long offset, long count, IProgressReport progress = null)
{
const int bufferSize = 0x4000;
long remaining = count;
if (remaining < 0)
{
throw new ArgumentException("Storage must have an explicit length");
}
progress?.SetTotal(remaining);
long pos = offset;
byte[] buffer = ArrayPool <byte> .Shared.Rent(bufferSize);
try
{
buffer.AsSpan(0, (int)Math.Min(remaining, bufferSize)).Fill(value);
while (remaining > 0)
{
int toFill = (int)Math.Min(bufferSize, remaining);
Span <byte> buf = buffer.AsSpan(0, toFill);
input.Write(buf, pos);
remaining -= toFill;
pos += toFill;
progress?.ReportAdd(toFill);
}
}
finally
{
ArrayPool <byte> .Shared.Return(buffer);
}
progress?.SetTotal(0);
}
public static void CopyTo(this IStorage input, IStorage output, IProgressReport progress = null)
{
const int bufferSize = 81920;
long remaining = Math.Min(input.GetSize(), output.GetSize());
if (remaining < 0)
{
throw new ArgumentException("Storage must have an explicit length");
}
progress?.SetTotal(remaining);
long pos = 0;
byte[] buffer = ArrayPool <byte> .Shared.Rent(bufferSize);
try
{
while (remaining > 0)
{
int toCopy = (int)Math.Min(bufferSize, remaining);
Span <byte> buf = buffer.AsSpan(0, toCopy);
input.Read(buf, pos);
output.Write(buf, pos);
remaining -= toCopy;
pos += toCopy;
progress?.ReportAdd(toCopy);
}
}
finally
{
ArrayPool <byte> .Shared.Return(buffer);
}
progress?.SetTotal(0);
}
public static void Write(this IStorage storage, byte[] buffer, long offset, int count, int bufferOffset)
{
ValidateStorageParameters(buffer, offset, count, bufferOffset);
storage.Write(buffer.AsSpan(bufferOffset, count), offset);
}
