public int Unwrap(ReadOnlySpan <byte> src, Span <byte> dst, bool bufferSizePrecheck = true)
{
if (bufferSizePrecheck)
{
var expectedDstSize = GetDecompressedSize(src);
if (expectedDstSize > (ulong)dst.Length)
{
throw new ZstdException(ZSTD_ErrorCode.ZSTD_error_dstSize_tooSmall, "Destination buffer size is less than specified decompressed content size");
}
}
var dstSize = Options.Ddict == IntPtr.Zero
? ExternMethods.ZSTD_decompressDCtx(dctx, dst, (size_t)dst.Length, src, (size_t)src.Length)
: ExternMethods.ZSTD_decompress_usingDDict(dctx, dst, (size_t)dst.Length, src, (size_t)src.Length, Options.Ddict);
return((int)dstSize.EnsureZstdSuccess());
}
public int Unwrap(ArraySegment <byte> src, byte[] dst, int offset, bool bufferSizePrecheck = true)
{
if (offset < 0 || offset >= dst.Length)
{
throw new ArgumentOutOfRangeException(nameof(offset));
}
if (src.Count == 0)
{
return(0);
}
var dstCapacity = dst.Length - offset;
using (var srcPtr = new ArraySegmentPtr(src))
{
if (bufferSizePrecheck)
{
var expectedDstSize = ExternMethods.ZSTD_getDecompressedSize(srcPtr, (size_t)src.Count);
if ((int)expectedDstSize > dstCapacity)
{
throw new InsufficientMemoryException("Buffer size is less than specified decompressed data size");
}
}
size_t dstSize;
using (var dstPtr = new ArraySegmentPtr(new ArraySegment <byte>(dst, offset, dstCapacity)))
{
if (Options.Ddict == IntPtr.Zero)
{
dstSize = ExternMethods.ZSTD_decompressDCtx(dctx, dstPtr, (size_t)dstCapacity, srcPtr, (size_t)src.Count);
}
else
{
dstSize = ExternMethods.ZSTD_decompress_usingDDict(dctx, dstPtr, (size_t)dstCapacity, srcPtr, (size_t)src.Count,
Options.Ddict);
}
}
dstSize.EnsureZstdSuccess();
return((int)dstSize);
}
}
// Token: 0x06000022 RID: 34 RVA: 0x000025C4 File Offset: 0x000007C4
public int Unwrap(ArraySegment <byte> src, byte[] dst, int offset, bool bufferSizePrecheck = true)
{
if (offset < 0 || offset >= dst.Length)
{
throw new ArgumentOutOfRangeException("offset");
}
if (src.Count == 0)
{
return(0);
}
int num = dst.Length - offset;
int result;
using (ArraySegmentPtr arraySegmentPtr = new ArraySegmentPtr(src))
{
if (bufferSizePrecheck && (int)ExternMethods.ZSTD_getDecompressedSize(arraySegmentPtr, (UIntPtr)((ulong)((long)src.Count))) > num)
{
throw new InsufficientMemoryException("Buffer size is less than specified decompressed data size");
}
UIntPtr uintPtr;
using (ArraySegmentPtr arraySegmentPtr2 = new ArraySegmentPtr(new ArraySegment <byte>(dst, offset, num)))
{
if (this.Options.Ddict == IntPtr.Zero)
{
uintPtr = ExternMethods.ZSTD_decompressDCtx(this.dctx, arraySegmentPtr2, (UIntPtr)((ulong)((long)num)), arraySegmentPtr, (UIntPtr)((ulong)((long)src.Count)));
}
else
{
uintPtr = ExternMethods.ZSTD_decompress_usingDDict(this.dctx, arraySegmentPtr2, (UIntPtr)((ulong)((long)num)), arraySegmentPtr, (UIntPtr)((ulong)((long)src.Count)), this.Options.Ddict);
}
}
uintPtr.EnsureZstdSuccess();
result = (int)((uint)uintPtr);
}
return(result);
}
