445 lines
21 KiB
C#
445 lines
21 KiB
C#
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using Unity.Collections.LowLevel.Unsafe;
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namespace Unity.Collections
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{
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/// <summary>
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/// Provides extension methods for FixedString*N*Bytes.
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/// </summary>
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[GenerateTestsForBurstCompatibility]
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public unsafe static partial class FixedStringMethods
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{
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/// <summary>
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/// Appends a Unicode.Rune to this string.
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/// </summary>
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/// <typeparam name="T">The type of FixedString*N*Bytes.</typeparam>
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/// <param name="fs">A FixedString*N*Bytes.</param>
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/// <param name="rune">A Unicode.Rune to append.</param>
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/// <returns>FormatError.None if successful. Returns FormatError.Overflow if the capacity of the string is exceeded.</returns>
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[GenerateTestsForBurstCompatibility(GenericTypeArguments = new[] { typeof(FixedString128Bytes) })]
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public static FormatError Append<T>(ref this T fs, Unicode.Rune rune)
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where T : unmanaged, INativeList<byte>, IUTF8Bytes
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{
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var len = fs.Length;
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var runeLen = rune.LengthInUtf8Bytes();
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if (!fs.TryResize(len + runeLen, NativeArrayOptions.UninitializedMemory))
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return FormatError.Overflow;
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return fs.Write(ref len, rune);
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}
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/// <summary>
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/// Appends a char to this string.
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/// </summary>
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/// <typeparam name="T">The type of FixedString*N*Bytes.</typeparam>
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/// <param name="fs">A FixedString*N*Bytes.</param>
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/// <param name="ch">A char to append.</param>
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/// <returns>FormatError.None if successful. Returns FormatError.Overflow if the capacity of the string is exceeded.</returns>
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[GenerateTestsForBurstCompatibility(GenericTypeArguments = new[] { typeof(FixedString128Bytes) })]
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public static FormatError Append<T>(ref this T fs, char ch)
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where T : unmanaged, INativeList<byte>, IUTF8Bytes
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{
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return fs.Append((Unicode.Rune) ch);
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}
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/// <summary>
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/// Appends a byte to this string.
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/// </summary>
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/// <remarks>
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/// No validation is performed: it is your responsibility for the data to be valid UTF-8 when you're done appending bytes.
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/// </remarks>
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/// <typeparam name="T">The type of FixedString*N*Bytes.</typeparam>
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/// <param name="fs">A FixedString*N*Bytes.</param>
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/// <param name="a">A byte to append.</param>
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/// <returns>FormatError.None if successful. Returns FormatError.Overflow if the capacity of the string is exceeded.</returns>
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[GenerateTestsForBurstCompatibility(GenericTypeArguments = new[] { typeof(FixedString128Bytes) })]
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public static FormatError AppendRawByte<T>(ref this T fs, byte a)
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where T : unmanaged, INativeList<byte>, IUTF8Bytes
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{
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var origLength = fs.Length;
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if (!fs.TryResize(origLength + 1, NativeArrayOptions.UninitializedMemory))
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return FormatError.Overflow;
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fs.GetUnsafePtr()[origLength] = a;
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return FormatError.None;
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}
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/// <summary>
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/// Appends a Unicode.Rune a number of times to this string.
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/// </summary>
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/// <typeparam name="T">The type of FixedString*N*Bytes.</typeparam>
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/// <param name="fs">A FixedString*N*Bytes.</param>
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/// <param name="rune">A Unicode.Rune to append some number of times.</param>
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/// <param name="count">The number of times to append the rune.</param>
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/// <returns>FormatError.None if successful. Returns FormatError.Overflow if the capacity of the string is exceeded.</returns>
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[GenerateTestsForBurstCompatibility(GenericTypeArguments = new[] { typeof(FixedString128Bytes) })]
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public static FormatError Append<T>(ref this T fs, Unicode.Rune rune, int count)
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where T : unmanaged, INativeList<byte>, IUTF8Bytes
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{
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var origLength = fs.Length;
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if (!fs.TryResize(origLength + rune.LengthInUtf8Bytes() * count, NativeArrayOptions.UninitializedMemory))
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return FormatError.Overflow;
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var cap = fs.Capacity;
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var b = fs.GetUnsafePtr();
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int offset = origLength;
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for (int i = 0; i < count; ++i)
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{
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var error = Unicode.UcsToUtf8(b, ref offset, cap, rune);
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if (error != ConversionError.None)
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return FormatError.Overflow;
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}
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return FormatError.None;
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}
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/// <summary>
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/// Appends a number (converted to UTF-8 characters) to this string.
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/// </summary>
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/// <typeparam name="T">The type of FixedString*N*Bytes.</typeparam>
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/// <param name="fs">A FixedString*N*Bytes.</param>
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/// <param name="input">A long integer to append to the string.</param>
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/// <returns>FormatError.None if successful. Returns FormatError.Overflow if the capacity of the string is exceeded.</returns>
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[GenerateTestsForBurstCompatibility(GenericTypeArguments = new[] { typeof(FixedString128Bytes) })]
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public static FormatError Append<T>(ref this T fs, long input)
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where T : unmanaged, INativeList<byte>, IUTF8Bytes
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{
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const int maximumDigits = 20;
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var temp = stackalloc byte[maximumDigits];
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int offset = maximumDigits;
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if (input >= 0)
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{
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do
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{
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var digit = (byte)(input % 10);
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temp[--offset] = (byte)('0' + digit);
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input /= 10;
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}
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while (input != 0);
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}
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else
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{
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do
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{
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var digit = (byte)(input % 10);
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temp[--offset] = (byte)('0' - digit);
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input /= 10;
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}
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while (input != 0);
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temp[--offset] = (byte)'-';
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}
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return fs.Append(temp + offset, maximumDigits - offset);
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}
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/// <summary>
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/// Appends a number (converted to UTF-8 characters) to this string.
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/// </summary>
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/// <typeparam name="T">The type of FixedString*N*Bytes.</typeparam>
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/// <param name="fs">A FixedString*N*Bytes.</param>
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/// <param name="input">An int to append to the string.</param>
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/// <returns>FormatError.None if successful. Returns FormatError.Overflow if the capacity of the string is exceeded.</returns>
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[GenerateTestsForBurstCompatibility(GenericTypeArguments = new[] { typeof(FixedString128Bytes) })]
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public static FormatError Append<T>(ref this T fs, int input)
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where T : unmanaged, INativeList<byte>, IUTF8Bytes
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{
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return fs.Append((long)input);
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}
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/// <summary>
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/// Appends a number (converted to UTF-8 characters) to this string.
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/// </summary>
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/// <typeparam name="T">The type of FixedString*N*Bytes.</typeparam>
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/// <param name="fs">A FixedString*N*Bytes.</param>
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/// <param name="input">A ulong integer to append to the string.</param>
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/// <returns>FormatError.None if successful. Returns FormatError.Overflow if the capacity of the string is exceeded.</returns>
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[GenerateTestsForBurstCompatibility(GenericTypeArguments = new[] { typeof(FixedString128Bytes) })]
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public static FormatError Append<T>(ref this T fs, ulong input)
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where T : unmanaged, INativeList<byte>, IUTF8Bytes
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{
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const int maximumDigits = 20;
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var temp = stackalloc byte[maximumDigits];
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int offset = maximumDigits;
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do
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{
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var digit = (byte)(input % 10);
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temp[--offset] = (byte)('0' + digit);
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input /= 10;
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}
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while (input != 0);
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return fs.Append(temp + offset, maximumDigits - offset);
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}
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/// <summary>
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/// Appends a number (converted to UTF-8 characters) to this string.
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/// </summary>
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/// <typeparam name="T">The type of FixedString*N*Bytes.</typeparam>
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/// <param name="fs">A FixedString*N*Bytes.</param>
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/// <param name="input">A uint to append to the string.</param>
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/// <returns>FormatError.None if successful. Returns FormatError.Overflow if the capacity of the string is exceeded.</returns>
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[GenerateTestsForBurstCompatibility(GenericTypeArguments = new[] { typeof(FixedString128Bytes) })]
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public static FormatError Append<T>(ref this T fs, uint input)
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where T : unmanaged, INativeList<byte>, IUTF8Bytes
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{
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return fs.Append((ulong)input);
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}
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/// <summary>
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/// Appends a number (converted to UTF-8 characters) to this string.
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/// </summary>
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/// <typeparam name="T">The type of FixedString*N*Bytes.</typeparam>
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/// <param name="fs">A FixedString*N*Bytes.</param>
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/// <param name="input">A float to append to the string.</param>
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/// <param name="decimalSeparator">The character to use as the decimal separator. Defaults to a period ('.').</param>
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/// <returns>FormatError.None if successful. Returns FormatError.Overflow if the capacity of the string is exceeded.</returns>
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[GenerateTestsForBurstCompatibility(GenericTypeArguments = new[] { typeof(FixedString128Bytes) })]
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public static FormatError Append<T>(ref this T fs, float input, char decimalSeparator = '.')
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where T : unmanaged, INativeList<byte>, IUTF8Bytes
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{
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FixedStringUtils.UintFloatUnion ufu = new FixedStringUtils.UintFloatUnion();
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ufu.floatValue = input;
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var sign = ufu.uintValue >> 31;
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ufu.uintValue &= ~(1 << 31);
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FormatError error;
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if ((ufu.uintValue & 0x7F800000) == 0x7F800000)
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{
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if (ufu.uintValue == 0x7F800000)
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{
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if (sign != 0 && ((error = fs.Append('-')) != FormatError.None))
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return error;
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return fs.Append('I', 'n', 'f', 'i', 'n', 'i', 't', 'y');
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}
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return fs.Append('N', 'a', 'N');
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}
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if (sign != 0 && ufu.uintValue != 0) // C# prints -0 as 0
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if ((error = fs.Append('-')) != FormatError.None)
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return error;
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ulong decimalMantissa = 0;
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int decimalExponent = 0;
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FixedStringUtils.Base2ToBase10(ref decimalMantissa, ref decimalExponent, ufu.floatValue);
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var backwards = stackalloc char[9];
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int decimalDigits = 0;
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do
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{
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if (decimalDigits >= 9)
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return FormatError.Overflow;
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var decimalDigit = decimalMantissa % 10;
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backwards[8 - decimalDigits++] = (char)('0' + decimalDigit);
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decimalMantissa /= 10;
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}
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while (decimalMantissa > 0);
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char *ascii = backwards + 9 - decimalDigits;
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var leadingZeroes = -decimalExponent - decimalDigits + 1;
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if (leadingZeroes > 0)
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{
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if (leadingZeroes > 4)
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return fs.AppendScientific(ascii, decimalDigits, decimalExponent, decimalSeparator);
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if ((error = fs.Append('0', decimalSeparator)) != FormatError.None)
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return error;
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--leadingZeroes;
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while (leadingZeroes > 0)
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{
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if ((error = fs.Append('0')) != FormatError.None)
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return error;
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--leadingZeroes;
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}
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for (var i = 0; i < decimalDigits; ++i)
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{
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if ((error = fs.Append(ascii[i])) != FormatError.None)
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return error;
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}
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return FormatError.None;
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}
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var trailingZeroes = decimalExponent;
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if (trailingZeroes > 0)
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{
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if (trailingZeroes > 4)
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return fs.AppendScientific(ascii, decimalDigits, decimalExponent, decimalSeparator);
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for (var i = 0; i < decimalDigits; ++i)
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{
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if ((error = fs.Append(ascii[i])) != FormatError.None)
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return error;
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}
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while (trailingZeroes > 0)
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{
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if ((error = fs.Append('0')) != FormatError.None)
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return error;
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--trailingZeroes;
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}
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return FormatError.None;
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}
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var indexOfSeparator = decimalDigits + decimalExponent;
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for (var i = 0; i < decimalDigits; ++i)
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{
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if (i == indexOfSeparator)
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if ((error = fs.Append(decimalSeparator)) != FormatError.None)
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return error;
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if ((error = fs.Append(ascii[i])) != FormatError.None)
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return error;
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}
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return FormatError.None;
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}
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/// <summary>
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/// Appends another string to this string.
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/// </summary>
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/// <remarks>
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/// When the method returns an error, the destination string is not modified.
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/// </remarks>
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/// <typeparam name="T">The type of the destination string.</typeparam>
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/// <typeparam name="T2">The type of the source string.</typeparam>
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/// <param name="fs">The destination string.</param>
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/// <param name="input">The source string.</param>
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/// <returns>FormatError.None if successful. Returns FormatError.Overflow if the capacity of the destination string is exceeded.</returns>
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[GenerateTestsForBurstCompatibility(GenericTypeArguments = new[] { typeof(FixedString128Bytes), typeof(FixedString128Bytes) })]
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public static FormatError Append<T,T2>(ref this T fs, in T2 input)
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where T : unmanaged, INativeList<byte>, IUTF8Bytes
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where T2 : unmanaged, INativeList<byte>, IUTF8Bytes
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{
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ref var inputRef = ref UnsafeUtilityExtensions.AsRef(input);
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return fs.Append(inputRef.GetUnsafePtr(), inputRef.Length);
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}
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/// <summary>
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/// Copies another string to this string (making the two strings equal).
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/// </summary>
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/// <remarks>
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/// When the method returns an error, the destination string is not modified.
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/// </remarks>
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/// <typeparam name="T">The type of the destination string.</typeparam>
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/// <typeparam name="T2">The type of the source string.</typeparam>
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/// <param name="fs">The destination string.</param>
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/// <param name="input">The source string.</param>
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/// <returns>CopyError.None if successful. Returns CopyError.Truncation if the source string is too large to fit in the destination.</returns>
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[GenerateTestsForBurstCompatibility(GenericTypeArguments = new[] { typeof(FixedString128Bytes), typeof(FixedString128Bytes) })]
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public static CopyError CopyFrom<T, T2>(ref this T fs, in T2 input)
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where T : unmanaged, INativeList<byte>, IUTF8Bytes
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where T2 : unmanaged, INativeList<byte>, IUTF8Bytes
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{
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fs.Length = 0;
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var fe = Append(ref fs, input);
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if (fe != FormatError.None)
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return CopyError.Truncation;
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return CopyError.None;
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}
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/// <summary>
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/// Appends bytes to this string.
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/// </summary>
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/// <remarks>
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/// When the method returns an error, the destination string is not modified.
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///
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/// No validation is performed: it is your responsibility for the destination to contain valid UTF-8 when you're done appending bytes.
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/// </remarks>
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/// <typeparam name="T">The type of the destination string.</typeparam>
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/// <param name="fs">The destination string.</param>
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/// <param name="utf8Bytes">The bytes to append.</param>
|
||
|
|
/// <param name="utf8BytesLength">The number of bytes to append.</param>
|
||
|
|
/// <returns>FormatError.None if successful. Returns FormatError.Overflow if the capacity of the destination string is exceeded.</returns>
|
||
|
|
[GenerateTestsForBurstCompatibility(GenericTypeArguments = new[] { typeof(FixedString128Bytes) })]
|
||
|
|
public unsafe static FormatError Append<T>(ref this T fs, byte* utf8Bytes, int utf8BytesLength)
|
||
|
|
where T : unmanaged, INativeList<byte>, IUTF8Bytes
|
||
|
|
{
|
||
|
|
var origLength = fs.Length;
|
||
|
|
if (!fs.TryResize(origLength + utf8BytesLength, NativeArrayOptions.UninitializedMemory))
|
||
|
|
return FormatError.Overflow;
|
||
|
|
UnsafeUtility.MemCpy(fs.GetUnsafePtr() + origLength, utf8Bytes, utf8BytesLength);
|
||
|
|
return FormatError.None;
|
||
|
|
}
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Appends another string to this string.
|
||
|
|
/// </summary>
|
||
|
|
/// <remarks>
|
||
|
|
/// When the method returns an error, the destination string is not modified.
|
||
|
|
/// </remarks>
|
||
|
|
/// <typeparam name="T">The type of the destination string.</typeparam>
|
||
|
|
/// <param name="fs">The destination string.</param>
|
||
|
|
/// <param name="s">The string to append.</param>
|
||
|
|
/// <returns>FormatError.None if successful. Returns FormatError.Overflow if the capacity of the destination string is exceeded.</returns>
|
||
|
|
[ExcludeFromBurstCompatTesting("Takes managed string")]
|
||
|
|
public unsafe static FormatError Append<T>(ref this T fs, string s)
|
||
|
|
where T : unmanaged, INativeList<byte>, IUTF8Bytes
|
||
|
|
{
|
||
|
|
// we don't know how big the expansion from UTF16 to UTF8 will be, so we account for worst case.
|
||
|
|
int worstCaseCapacity = s.Length * 4;
|
||
|
|
byte* utf8Bytes = stackalloc byte[worstCaseCapacity];
|
||
|
|
int utf8Len;
|
||
|
|
|
||
|
|
fixed (char* chars = s)
|
||
|
|
{
|
||
|
|
var err = UTF8ArrayUnsafeUtility.Copy(utf8Bytes, out utf8Len, worstCaseCapacity, chars, s.Length);
|
||
|
|
if (err != CopyError.None)
|
||
|
|
{
|
||
|
|
return FormatError.Overflow;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return fs.Append(utf8Bytes, utf8Len);
|
||
|
|
}
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Copies another string to this string (making the two strings equal).
|
||
|
|
/// Replaces any existing content of the FixedString.
|
||
|
|
/// </summary>
|
||
|
|
/// <remarks>
|
||
|
|
/// When the method returns an error, the destination string is not modified.
|
||
|
|
/// </remarks>
|
||
|
|
/// <typeparam name="T">The type of the destination string.</typeparam>
|
||
|
|
/// <param name="fs">The destination string.</param>
|
||
|
|
/// <param name="s">The source string.</param>
|
||
|
|
/// <returns>CopyError.None if successful. Returns CopyError.Truncation if the source string is too large to fit in the destination.</returns>
|
||
|
|
[ExcludeFromBurstCompatTesting("Takes managed string")]
|
||
|
|
public static CopyError CopyFrom<T>(ref this T fs, string s)
|
||
|
|
where T : unmanaged, INativeList<byte>, IUTF8Bytes
|
||
|
|
{
|
||
|
|
fs.Length = 0;
|
||
|
|
var fe = Append(ref fs, s);
|
||
|
|
if (fe != FormatError.None)
|
||
|
|
return CopyError.Truncation;
|
||
|
|
return CopyError.None;
|
||
|
|
}
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Copies another string to this string. If the string exceeds the capacity it will be truncated.
|
||
|
|
/// Replaces any existing content of the FixedString.
|
||
|
|
/// </summary>
|
||
|
|
/// <typeparam name="T">The type of the destination string.</typeparam>
|
||
|
|
/// <param name="fs">The destination string.</param>
|
||
|
|
/// <param name="s">The source string.</param>
|
||
|
|
/// <returns>CopyError.None if successful. Returns CopyError.Truncation if the source string is too large to fit in the destination.</returns>
|
||
|
|
[ExcludeFromBurstCompatTesting("Takes managed string")]
|
||
|
|
public static CopyError CopyFromTruncated<T>(ref this T fs, string s)
|
||
|
|
where T : unmanaged, INativeList<byte>, IUTF8Bytes
|
||
|
|
{
|
||
|
|
int utf8Len;
|
||
|
|
fixed (char* chars = s)
|
||
|
|
{
|
||
|
|
var error = UTF8ArrayUnsafeUtility.Copy(fs.GetUnsafePtr(), out utf8Len, fs.Capacity, chars, s.Length);
|
||
|
|
fs.Length = utf8Len;
|
||
|
|
return error;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Copies another string to this string. If the string exceeds the capacity it will be truncated.
|
||
|
|
/// </summary>
|
||
|
|
/// <remarks>
|
||
|
|
/// When the method returns an error, the destination string is not modified.
|
||
|
|
/// </remarks>
|
||
|
|
/// <typeparam name="T">The type of the destination string.</typeparam>
|
||
|
|
/// <typeparam name="T2">The type of the source string.</typeparam>
|
||
|
|
/// <param name="fs">The destination string.</param>
|
||
|
|
/// <param name="input">The source string.</param>
|
||
|
|
/// <returns>CopyError.None if successful. Returns CopyError.Truncation if the source string is too large to fit in the destination.</returns>
|
||
|
|
[GenerateTestsForBurstCompatibility(GenericTypeArguments = new[] { typeof(FixedString128Bytes), typeof(FixedString128Bytes) })]
|
||
|
|
public static CopyError CopyFromTruncated<T, T2>(ref this T fs, in T2 input)
|
||
|
|
where T : unmanaged, INativeList<byte>, IUTF8Bytes
|
||
|
|
where T2 : unmanaged, INativeList<byte>, IUTF8Bytes
|
||
|
|
{
|
||
|
|
var error = UTF8ArrayUnsafeUtility.Copy(fs.GetUnsafePtr(), out int utf8Len, fs.Capacity, input.GetUnsafePtr(), input.Length);
|
||
|
|
fs.Length = utf8Len;
|
||
|
|
return error;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|