public void MustBeLessThan_IsGreaterOrEqual_ThrowsNoException(int value, int max)
{
var exception = Assert.Throws <ArgumentOutOfRangeException>(() =>
{
DebugGuard.MustBeLessThan(value, max, "myParamName");
});
Assert.Equal("myParamName", exception.ParamName);
Assert.True(exception.Message.Contains($"Value must be less than {max}."));
}
/// <summary>
/// Gets a reference to the element at the specified position.
/// </summary>
/// <param name="x">The x coordinate (row)</param>
/// <param name="y">The y coordinate (position at row)</param>
/// <returns>A reference to the element.</returns>
public ref T this[int x, int y]
{
[MethodImpl(MethodImplOptions.AggressiveInlining)]
get
{
DebugGuard.MustBeLessThan(x, this.Width, nameof(x));
DebugGuard.MustBeLessThan(y, this.Height, nameof(y));
Span <T> span = this.Span;
return(ref span[(this.Width * y) + x]);
/// <summary>
/// Returns a reference to specified element of the buffer.
/// </summary>
/// <param name="index">The index</param>
/// <returns>The reference to the specified element</returns>
public ref T this[int index]
{
[MethodImpl(MethodImplOptions.AggressiveInlining)]
get
{
DebugGuard.MustBeLessThan(index, this.Length, nameof(index));
Span <T> span = this.Span;
return(ref span[index]);
}
}
/// <summary>
/// Gets a reference to the element at the specified position.
/// </summary>
/// <param name="x">The x coordinate (row)</param>
/// <param name="y">The y coordinate (position at row)</param>
/// <returns>A reference to the element.</returns>
/// <exception cref="IndexOutOfRangeException">When index is out of range of the buffer.</exception>
public ref T this[int x, int y]
{
[MethodImpl(InliningOptions.ShortMethod)]
get
{
DebugGuard.MustBeGreaterThanOrEqualTo(x, 0, nameof(x));
DebugGuard.MustBeGreaterThanOrEqualTo(y, 0, nameof(y));
DebugGuard.MustBeLessThan(x, this.Width, nameof(x));
DebugGuard.MustBeLessThan(y, this.Height, nameof(y));
return(ref this.GetRowSpan(y)[x]);
}
}
internal bool DangerousTryGetPaddedRowSpan(int y, int padding, out Span <T> paddedSpan)
{
DebugGuard.MustBeGreaterThanOrEqualTo(y, 0, nameof(y));
DebugGuard.MustBeLessThan(y, this.Height, nameof(y));
int stride = this.Width + padding;
Span <T> slice = this.FastMemoryGroup.GetRemainingSliceOfBuffer(y * (long)this.Width);
if (slice.Length < stride)
{
paddedSpan = default;
return(false);
}
paddedSpan = slice.Slice(0, stride);
return(true);
}
public void Update(byte[] buffer, int offset, int count)
{
DebugGuard.NotNull(buffer, nameof(buffer));
DebugGuard.MustBeGreaterThanOrEqualTo(offset, 0, nameof(offset));
DebugGuard.MustBeGreaterThanOrEqualTo(count, 0, nameof(count));
DebugGuard.MustBeLessThan(offset, buffer.Length, nameof(offset));
DebugGuard.MustBeLessThanOrEqualTo(offset + count, buffer.Length, nameof(count));
// (By Per Bothner)
uint s1 = this.checksum & 0xFFFF;
uint s2 = this.checksum >> 16;
while (count > 0)
{
// We can defer the modulo operation:
// s1 maximally grows from 65521 to 65521 + 255 * 3800
// s2 maximally grows by 3800 * median(s1) = 2090079800 < 2^31
int n = 3800;
if (n > count)
{
n = count;
}
count -= n;
while (--n >= 0)
{
s1 = s1 + (uint)(buffer[offset++] & 0xff);
s2 = s2 + s1;
}
s1 %= Base;
s2 %= Base;
}
this.checksum = (s2 << 16) | s1;
}
internal Memory <T> GetSafeRowMemory(int y)
{
DebugGuard.MustBeGreaterThanOrEqualTo(y, 0, nameof(y));
DebugGuard.MustBeLessThan(y, this.Height, nameof(y));
return(this.FastMemoryGroup.View.GetBoundedMemorySlice(y * (long)this.Width, this.Width));
}
public void MustBeLessThan_IsLess_ThrowsNoException()
{
DebugGuard.MustBeLessThan(0, 1, "myParamName");
}
private static int GetColorIndex(ref Rgba32 color, int level)
{
DebugGuard.MustBeLessThan(level, Mask.Length, nameof(level));
int shift = 7 - level;
ref byte maskRef = ref MemoryMarshal.GetReference(Mask);