diff options
| -rw-r--r-- | src/mscorlib/shared/System/Number.Formatting.cs | 335 |
1 files changed, 196 insertions, 139 deletions
diff --git a/src/mscorlib/shared/System/Number.Formatting.cs b/src/mscorlib/shared/System/Number.Formatting.cs index 24d5db1da9..74395ab2f5 100644 --- a/src/mscorlib/shared/System/Number.Formatting.cs +++ b/src/mscorlib/shared/System/Number.Formatting.cs @@ -2,6 +2,7 @@ // The .NET Foundation licenses this file to you under the MIT license. // See the LICENSE file in the project root for more information. +using System.Buffers.Text; using System.Diagnostics; using System.Globalization; using System.Runtime.CompilerServices; @@ -246,9 +247,7 @@ namespace System private const int DoublePrecision = 15; private const int ScaleNAN = unchecked((int)0x80000000); private const int ScaleINF = 0x7FFFFFFF; - private const int MaxUInt32HexDigits = 8; private const int MaxUInt32DecDigits = 10; - private const int MaxUInt64DecDigits = 20; private const int CharStackBufferSize = 32; private const string PosNumberFormat = "#"; @@ -972,18 +971,20 @@ namespace System if (digits < 1) digits = 1; - int bufferLength = Math.Max(digits, MaxUInt32DecDigits) + sNegative.Length; - int index = bufferLength; - - char* buffer = stackalloc char[bufferLength]; - char* p = UInt32ToDecChars(buffer + bufferLength, (uint)(-value), digits); - for (int i = sNegative.Length - 1; i >= 0; i--) + int bufferLength = Math.Max(digits, FormattingHelpers.CountDigits((uint)(-value))) + sNegative.Length; + string result = string.FastAllocateString(bufferLength); + fixed (char* buffer = result) { - *(--p) = sNegative[i]; - } + char* p = UInt32ToDecChars(buffer + bufferLength, (uint)(-value), digits); + Debug.Assert(p == buffer + sNegative.Length); - Debug.Assert(buffer + bufferLength - p >= 0 && buffer <= p); - return new string(p, 0, (int)(buffer + bufferLength - p)); + for (int i = sNegative.Length - 1; i >= 0; i--) + { + *(--p) = sNegative[i]; + } + Debug.Assert(p == buffer); + } + return result; } private static unsafe bool TryNegativeInt32ToDecStr(int value, int digits, string sNegative, Span<char> destination, out int charsWritten) @@ -993,18 +994,26 @@ namespace System if (digits < 1) digits = 1; - int bufferLength = Math.Max(digits, MaxUInt32DecDigits) + sNegative.Length; - int index = bufferLength; - - char* buffer = stackalloc char[bufferLength]; - char* p = UInt32ToDecChars(buffer + bufferLength, (uint)(-value), digits); - for (int i = sNegative.Length - 1; i >= 0; i--) + int bufferLength = Math.Max(digits, FormattingHelpers.CountDigits((uint)(-value))) + sNegative.Length; + if (bufferLength > destination.Length) { - *(--p) = sNegative[i]; + charsWritten = 0; + return false; } - Debug.Assert(buffer + bufferLength - p >= 0 && buffer <= p); - return TryCopyTo(p, (int)(buffer + bufferLength - p), destination, out charsWritten); + charsWritten = bufferLength; + fixed (char* buffer = &MemoryMarshal.GetReference(destination)) + { + char* p = UInt32ToDecChars(buffer + bufferLength, (uint)(-value), digits); + Debug.Assert(p == buffer + sNegative.Length); + + for (int i = sNegative.Length - 1; i >= 0; i--) + { + *(--p) = sNegative[i]; + } + Debug.Assert(p == buffer); + } + return true; } private static unsafe string Int32ToHexStr(int value, char hexBase, int digits) @@ -1012,11 +1021,14 @@ namespace System if (digits < 1) digits = 1; - int bufferLength = Math.Max(digits, MaxUInt32HexDigits); - char* buffer = stackalloc char[bufferLength]; - - char* p = Int32ToHexChars(buffer + bufferLength, (uint)value, hexBase, digits); - return new string(p, 0, (int)(buffer + bufferLength - p)); + int bufferLength = Math.Max(digits, FormattingHelpers.CountHexDigits((uint)value)); + string result = string.FastAllocateString(bufferLength); + fixed (char* buffer = result) + { + char* p = Int32ToHexChars(buffer + bufferLength, (uint)value, hexBase, digits); + Debug.Assert(p == buffer); + } + return result; } private static unsafe bool TryInt32ToHexStr(int value, char hexBase, int digits, Span<char> destination, out int charsWritten) @@ -1024,11 +1036,20 @@ namespace System if (digits < 1) digits = 1; - int bufferLength = Math.Max(digits, MaxUInt32HexDigits); - char* buffer = stackalloc char[bufferLength]; + int bufferLength = Math.Max(digits, FormattingHelpers.CountHexDigits((uint)value)); + if (bufferLength > destination.Length) + { + charsWritten = 0; + return false; + } - char* p = Int32ToHexChars(buffer + bufferLength, (uint)value, hexBase, digits); - return TryCopyTo(p, (int)(buffer + bufferLength - p), destination, out charsWritten); + charsWritten = bufferLength; + fixed (char* buffer = &MemoryMarshal.GetReference(destination)) + { + char* p = Int32ToHexChars(buffer + bufferLength, (uint)value, hexBase, digits); + Debug.Assert(p == buffer); + } + return true; } private static unsafe char* Int32ToHexChars(char* buffer, uint value, int hexBase, int digits) @@ -1073,56 +1094,62 @@ namespace System private static unsafe string UInt32ToDecStr(uint value, int digits) { - if (digits <= 1) + int bufferLength = Math.Max(digits, FormattingHelpers.CountDigits(value)); + string result = string.FastAllocateString(bufferLength); + fixed (char* buffer = result) { - char* buffer = stackalloc char[MaxUInt32DecDigits]; - - char* start = buffer + MaxUInt32DecDigits; - char* p = start; - do + char* p = buffer + bufferLength; + if (digits <= 1) + { + do + { + // TODO https://github.com/dotnet/coreclr/issues/3439 + uint div = value / 10; + *(--p) = (char)('0' + value - (div * 10)); + value = div; + } + while (value != 0); + } + else { - // TODO https://github.com/dotnet/coreclr/issues/3439 - uint div = value / 10; - *(--p) = (char)('0' + value - (div * 10)); - value = div; + p = UInt32ToDecChars(p, value, digits); } - while (value != 0); - - return new string(p, 0, (int)(start - p)); - } - else - { - int bufferSize = Math.Max(digits, MaxUInt32DecDigits); - char* buffer = stackalloc char[bufferSize]; - char* p = UInt32ToDecChars(buffer + bufferSize, value, digits); - return new string(p, 0, (int)(buffer + bufferSize - p)); + Debug.Assert(p == buffer); } + return result; } private static unsafe bool TryUInt32ToDecStr(uint value, int digits, Span<char> destination, out int charsWritten) { - if (digits <= 1) + int bufferLength = Math.Max(digits, FormattingHelpers.CountDigits(value)); + if (bufferLength > destination.Length) { - char* buffer = stackalloc char[MaxUInt32DecDigits]; - char* start = buffer + MaxUInt32DecDigits; - char* p = start; - do - { - // TODO https://github.com/dotnet/coreclr/issues/3439 - uint div = value / 10; - *(--p) = (char)('0' + value - (div * 10)); - value = div; - } - while (value != 0); - return TryCopyTo(p, (int)(start - p), destination, out charsWritten); + charsWritten = 0; + return false; } - else + + charsWritten = bufferLength; + fixed (char* buffer = &MemoryMarshal.GetReference(destination)) { - int bufferSize = Math.Max(digits, MaxUInt32DecDigits); - char* buffer = stackalloc char[bufferSize]; - char* p = UInt32ToDecChars(buffer + bufferSize, value, digits); - return TryCopyTo(p, (int)(buffer + bufferSize - p), destination, out charsWritten); + char* p = buffer + bufferLength; + if (digits <= 1) + { + do + { + // TODO https://github.com/dotnet/coreclr/issues/3439 + uint div = value / 10; + *(--p) = (char)('0' + value - (div * 10)); + value = div; + } + while (value != 0); + } + else + { + p = UInt32ToDecChars(p, value, digits); + } + Debug.Assert(p == buffer); } + return true; } [MethodImpl(MethodImplOptions.AggressiveInlining)] @@ -1176,24 +1203,26 @@ namespace System ulong value = (ulong)(-input); - int bufferLength = Math.Max(digits, MaxUInt64DecDigits) + sNegative.Length; - int index = bufferLength; - - char* buffer = stackalloc char[bufferLength]; - char* p = buffer + bufferLength; - while (High32(value) != 0) + int bufferLength = Math.Max(digits, FormattingHelpers.CountDigits(value)) + sNegative.Length; + string result = string.FastAllocateString(bufferLength); + fixed (char* buffer = result) { - p = UInt32ToDecChars(p, Int64DivMod1E9(ref value), 9); - digits -= 9; - } - p = UInt32ToDecChars(p, Low32(value), digits); + char* p = buffer + bufferLength; + while (High32(value) != 0) + { + p = UInt32ToDecChars(p, Int64DivMod1E9(ref value), 9); + digits -= 9; + } + p = UInt32ToDecChars(p, Low32(value), digits); + Debug.Assert(p == buffer + sNegative.Length); - for (int i = sNegative.Length - 1; i >= 0; i--) - { - *(--p) = sNegative[i]; + for (int i = sNegative.Length - 1; i >= 0; i--) + { + *(--p) = sNegative[i]; + } + Debug.Assert(p == buffer); } - - return new string(p, 0, (int)(buffer + bufferLength - p)); + return result; } private static unsafe bool TryNegativeInt64ToDecStr(long input, int digits, string sNegative, Span<char> destination, out int charsWritten) @@ -1207,64 +1236,80 @@ namespace System ulong value = (ulong)(-input); - int bufferLength = Math.Max(digits, MaxUInt64DecDigits) + sNegative.Length; - int index = bufferLength; - - char* buffer = stackalloc char[bufferLength]; - char* p = buffer + bufferLength; - while (High32(value) != 0) + int bufferLength = Math.Max(digits, FormattingHelpers.CountDigits((ulong)(-input))) + sNegative.Length; + if (bufferLength > destination.Length) { - p = UInt32ToDecChars(p, Int64DivMod1E9(ref value), 9); - digits -= 9; + charsWritten = 0; + return false; } - p = UInt32ToDecChars(p, Low32(value), digits); - for (int i = sNegative.Length - 1; i >= 0; i--) + charsWritten = bufferLength; + fixed (char* buffer = &MemoryMarshal.GetReference(destination)) { - *(--p) = sNegative[i]; - } + char* p = buffer + bufferLength; + while (High32(value) != 0) + { + p = UInt32ToDecChars(p, Int64DivMod1E9(ref value), 9); + digits -= 9; + } + p = UInt32ToDecChars(p, Low32(value), digits); + Debug.Assert(p == buffer + sNegative.Length); - return TryCopyTo(p, (int)(buffer + bufferLength - p), destination, out charsWritten); + for (int i = sNegative.Length - 1; i >= 0; i--) + { + *(--p) = sNegative[i]; + } + Debug.Assert(p == buffer); + } + return true; } private static unsafe string Int64ToHexStr(long value, char hexBase, int digits) { - int bufferLength = Math.Max(digits, MaxUInt32HexDigits * 2); - char* buffer = stackalloc char[bufferLength]; - int index = bufferLength; - - char* p; - if (High32((ulong)value) != 0) + int bufferLength = Math.Max(digits, FormattingHelpers.CountHexDigits((ulong)value)); + string result = string.FastAllocateString(bufferLength); + fixed (char* buffer = result) { - p = Int32ToHexChars(buffer + index, Low32((ulong)value), hexBase, 8); - p = Int32ToHexChars(p, High32((ulong)value), hexBase, digits - 8); - } - else - { - p = Int32ToHexChars(buffer + index, Low32((ulong)value), hexBase, Math.Max(digits, 1)); + char* p = buffer + bufferLength; + if (High32((ulong)value) != 0) + { + p = Int32ToHexChars(p, Low32((ulong)value), hexBase, 8); + p = Int32ToHexChars(p, High32((ulong)value), hexBase, digits - 8); + } + else + { + p = Int32ToHexChars(p, Low32((ulong)value), hexBase, Math.Max(digits, 1)); + } + Debug.Assert(p == buffer); } - - return new string(p, 0, (int)(buffer + bufferLength - p)); + return result; } private static unsafe bool TryInt64ToHexStr(long value, char hexBase, int digits, Span<char> destination, out int charsWritten) { - int bufferLength = Math.Max(digits, MaxUInt32HexDigits * 2); - char* buffer = stackalloc char[bufferLength]; - int index = bufferLength; - - char* p; - if (High32((ulong)value) != 0) + int bufferLength = Math.Max(digits, FormattingHelpers.CountHexDigits((ulong)value)); + if (bufferLength > destination.Length) { - p = Int32ToHexChars(buffer + index, Low32((ulong)value), hexBase, 8); - p = Int32ToHexChars(p, High32((ulong)value), hexBase, digits - 8); + charsWritten = 0; + return false; } - else + + charsWritten = bufferLength; + fixed (char* buffer = &MemoryMarshal.GetReference(destination)) { - p = Int32ToHexChars(buffer + index, Low32((ulong)value), hexBase, Math.Max(digits, 1)); + char* p = buffer + bufferLength; + if (High32((ulong)value) != 0) + { + p = Int32ToHexChars(p, Low32((ulong)value), hexBase, 8); + p = Int32ToHexChars(p, High32((ulong)value), hexBase, digits - 8); + } + else + { + p = Int32ToHexChars(p, Low32((ulong)value), hexBase, Math.Max(digits, 1)); + } + Debug.Assert(p == buffer); } - - return TryCopyTo(p, (int)(buffer + bufferLength - p), destination, out charsWritten); + return true; } private static unsafe void UInt64ToNumber(ulong value, ref NumberBuffer number) @@ -1293,17 +1338,20 @@ namespace System if (digits < 1) digits = 1; - int bufferSize = Math.Max(digits, MaxUInt64DecDigits); - char* buffer = stackalloc char[bufferSize]; - char* p = buffer + bufferSize; - while (High32(value) != 0) + int bufferLength = Math.Max(digits, FormattingHelpers.CountDigits(value)); + string result = string.FastAllocateString(bufferLength); + fixed (char* buffer = result) { - p = UInt32ToDecChars(p, Int64DivMod1E9(ref value), 9); - digits -= 9; + char* p = buffer + bufferLength; + while (High32(value) != 0) + { + p = UInt32ToDecChars(p, Int64DivMod1E9(ref value), 9); + digits -= 9; + } + p = UInt32ToDecChars(p, Low32(value), digits); + Debug.Assert(p == buffer); } - p = UInt32ToDecChars(p, Low32(value), digits); - - return new string(p, 0, (int)(buffer + bufferSize - p)); + return result; } private static unsafe bool TryUInt64ToDecStr(ulong value, int digits, Span<char> destination, out int charsWritten) @@ -1311,17 +1359,26 @@ namespace System if (digits < 1) digits = 1; - int bufferSize = Math.Max(digits, MaxUInt64DecDigits); - char* buffer = stackalloc char[bufferSize]; - char* p = buffer + bufferSize; - while (High32(value) != 0) + int bufferLength = Math.Max(digits, FormattingHelpers.CountDigits(value)); + if (bufferLength > destination.Length) { - p = UInt32ToDecChars(p, Int64DivMod1E9(ref value), 9); - digits -= 9; + charsWritten = 0; + return false; } - p = UInt32ToDecChars(p, Low32(value), digits); - return TryCopyTo(p, (int)(buffer + bufferSize - p), destination, out charsWritten); + charsWritten = bufferLength; + fixed (char* buffer = &MemoryMarshal.GetReference(destination)) + { + char* p = buffer + bufferLength; + while (High32(value) != 0) + { + p = UInt32ToDecChars(p, Int64DivMod1E9(ref value), 9); + digits -= 9; + } + p = UInt32ToDecChars(p, Low32(value), digits); + Debug.Assert(p == buffer); + } + return true; } internal static unsafe char ParseFormatSpecifier(ReadOnlySpan<char> format, out int digits) |