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Replace TrustedAsOfLength with safe As and Set.

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PopSlime
2023-02-10 15:47:20 +08:00
parent c04e50e959
commit b437925f92
7 changed files with 65 additions and 33 deletions
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42
Assets/Cryville/Common/Pdt/PdtVariableMemory.cs
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@@ -1,4 +1,5 @@
using System;
using UnsafeIL;
namespace Cryville.Common.Pdt {
/// <summary>
@@ -126,10 +127,43 @@ namespace Cryville.Common.Pdt {
throw new InvalidCastException("Not an identifier");
return *(int*)(_ptr + offset);
}
internal void* TrustedAsOfLength(int len) {
if (Length < len)
throw new InvalidCastException("Type not matched");
return _ptr;
/// <summary>
/// Gets the memory of the span as an instance of the specified type.
/// </summary>
/// <typeparam name="T">The specified type.</typeparam>
/// <param name="offset">The offset on the span to start reading from.</param>
/// <returns>An instance of the specified type.</returns>
/// <exception cref="ArgumentOutOfRangeException"><paramref name="offset" /> is not less than the length of the span.</exception>
/// <exception cref="InvalidCastException">The length of the span is not sufficient.</exception>
/// <remarks>
/// <para>Use <see cref="AsNumber(int)" /> instead while reading an unaligned number.</para>
/// </remarks>
public T As<T>(int offset = 0) {
var len = Unsafe.SizeOf<T>();
if (offset >= Length)
throw new ArgumentOutOfRangeException("offset");
if (offset + len > Length)
throw new InvalidCastException("Frame length not sufficient");
return Unsafe.Read<T>(_ptr + offset);
}
/// <summary>
/// Sets the memory of the span to an instance of the specified type.
/// </summary>
/// <typeparam name="T">The specified type.</typeparam>
/// <param name="value">The value.</param>
/// <param name="offset">The offset from the start of the span.</param>
/// <exception cref="ArgumentOutOfRangeException"><paramref name="offset" /> is not less than the length of the span.</exception>
/// <exception cref="InvalidCastException">The length of the span is not sufficient.</exception>
/// <remarks>
/// <para>Use <see cref="SetNumber(float, int)" /> instead while writing an unaligned number.</para>
/// </remarks>
public void Set<T>(T value, int offset = 0) {
var len = Unsafe.SizeOf<T>();
if (offset >= Length)
throw new ArgumentOutOfRangeException("offset");
if (offset + len > Length)
throw new InvalidCastException("Frame length not sufficient");
Unsafe.Write(_ptr + offset, value);
}
/// <summary>
/// Gets the array suffix.