mirror of
https://github.com/apple/swift.git
synced 2025-12-21 12:14:44 +01:00
93eb82c9a3
This reimplements the underlying support for `Float16(_:StringSlice)`, `Float32(_:StringSlice)`, and `Float64(_:StringSlice)` in pure Swift, using the same core algorithm currently used by Apple's libc. Those `StringSlice` initializers are in turn used by `Float16(_:String)`, `Float32(_:String)`, and `Float64(_:String)`. **Supports Embedded**: This fully supports Embedded Swift and insulates us from variations in libc implementations. **Corrects bugs in Float16 parsing**: The previous version of `Float16` parsing called libc `strtof()` to parse to a 32-bit float, then rounded to `Float16`. (This was necessary because float16 parsing functions are not widely supported in C implementations.) This double-rounding systematically corrupted NaN payloads and resulted in 1 ULP errors for certain decimal and hexadecimal inputs. The new version parses `Float16` directly, avoiding these errors. **Modest perforamnce improvement**: The old version had to copy the Swift string to construct a C string. For inputs longer than 15 characters, this typically required a heap allocation, which added up to 20% to the runtime. The new version parses directly from a Swift string, avoiding this copy and heap allocation.
286 lines
6.9 KiB
JSON
286 lines
6.9 KiB
JSON
{
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"Assert": [
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"Assert.swift",
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"AssertCommon.swift"
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],
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"String": [
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"ASCII.swift",
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"CString.swift",
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"Character.swift",
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"CharacterProperties.swift",
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"NFC.swift",
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"NFD.swift",
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"SmallString.swift",
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"StaticString.swift",
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"String.swift",
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"StringBreadcrumbs.swift",
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"StringBridge.swift",
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"StringCharacterView.swift",
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"StringComparable.swift",
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"StringComparison.swift",
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"StringCreate.swift",
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"StringObject.swift",
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"StringGuts.swift",
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"StringGutsSlice.swift",
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"StringGraphemeBreaking.swift",
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"StringHashable.swift",
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"StringIndex.swift",
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"StringIndexConversions.swift",
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"StringIndexValidation.swift",
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"StringInterpolation.swift",
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"StringLegacy.swift",
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"StringNormalization.swift",
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"StringProtocol.swift",
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"StringRangeReplaceableCollection.swift",
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"StringGutsRangeReplaceable.swift",
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"StringStorage.swift",
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"StringStorageBridge.swift",
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"StringSwitch.swift",
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"StringTesting.swift",
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"StringUTF16View.swift",
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"StringUTF8View.swift",
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"StringUTF8Validation.swift",
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"StringUnicodeScalarView.swift",
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"StringWordBreaking.swift",
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"Substring.swift",
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"Unicode.swift",
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"UnicodeData.swift",
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"UnicodeEncoding.swift",
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"UnicodeBreakProperty.swift",
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"UnicodeHelpers.swift",
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"UnicodeParser.swift",
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"UnicodeScalar.swift",
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"UnicodeScalarProperties.swift",
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"UnicodeSPI.swift",
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"UnavailableStringAPIs.swift",
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"UnmanagedOpaqueString.swift",
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"UnmanagedString.swift",
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"UTFEncoding.swift",
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"UTF8.swift",
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"UTF16.swift",
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"UTF32.swift",
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"ValidUTF8Buffer.swift"
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],
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"Bool": [
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"Bool.swift"
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],
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"Collection": [
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"Collection.swift",
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"BidirectionalCollection.swift",
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"RandomAccessCollection.swift",
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"MutableCollection.swift",
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"CollectionAlgorithms.swift",
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"EmptyCollection.swift",
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"Stride.swift",
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"Repeat.swift",
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"Sort.swift",
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"Range.swift",
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"ClosedRange.swift",
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"RangeSet.swift",
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"RangeSetRanges.swift",
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"CollectionOfOne.swift",
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"BridgingBuffer.swift",
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"Sequence.swift",
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"SequenceAlgorithms.swift",
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"RangeReplaceableCollection.swift",
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"Indices.swift",
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"WriteBackMutableSlice.swift",
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"UnfoldSequence.swift",
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"UIntBuffer.swift",
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"KeyValuePairs.swift",
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"Diffing.swift",
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"CollectionDifference.swift",
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{
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"Type-erased": [
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"ExistentialCollection.swift"
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],
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"Lazy Views": [
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"Algorithm.swift",
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"EnumeratedSequence.swift",
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"Flatten.swift",
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"FlatMap.swift",
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"Map.swift",
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"Join.swift",
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"Zip.swift",
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"Filter.swift",
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"Reverse.swift",
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"Slice.swift",
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"DiscontiguousSlice.swift",
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"DropWhile.swift",
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"PrefixWhile.swift",
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"LazyCollection.swift",
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"LazySequence.swift"],
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"Array": [
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"Array.swift",
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"ArrayBody.swift",
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"ArrayBuffer.swift",
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"ArrayBufferProtocol.swift",
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"ArrayCast.swift",
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"ArrayType.swift",
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"ArrayShared.swift",
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"ArraySlice.swift",
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"CocoaArray.swift",
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"ContiguousArray.swift",
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"ContiguousArrayBuffer.swift",
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"ContiguouslyStored.swift",
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"SliceBuffer.swift",
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"SwiftNativeNSArray.swift"],
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"HashedCollections": [
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"HashTable.swift",
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"Dictionary.swift",
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"NativeDictionary.swift",
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"DictionaryBridging.swift",
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"DictionaryBuilder.swift",
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"DictionaryCasting.swift",
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"DictionaryStorage.swift",
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"DictionaryVariant.swift",
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"Set.swift",
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"NativeSet.swift",
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"SetAnyHashableExtensions.swift",
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"SetBridging.swift",
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"SetBuilder.swift",
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"SetCasting.swift",
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"SetStorage.swift",
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"SetVariant.swift"
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]
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}
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],
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"C": [
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"BridgeObjectiveC.swift",
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"BridgeStorage.swift",
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"Builtin.swift",
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"VarArgs.swift",
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"CTypes.swift",
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"MemoryLayout.swift"
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],
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"KeyPaths": [
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"KeyPath.swift"
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],
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"Reflection": [
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"Dump.swift",
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"Mirror.swift",
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"Mirrors.swift",
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"ReflectionMirror.swift",
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"ObjectIdentifier.swift",
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"ObjectIdentifier+DebugDescription.swift"
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],
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"Math": [
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"SetAlgebra.swift",
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"BuiltinMath.swift",
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{
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"Integers": [
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"Int128.swift",
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"Integers.swift",
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"IntegerTypes.swift",
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"IntegerParsing.swift",
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"LegacyInt128.swift",
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"StaticBigInt.swift",
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"UInt128.swift"],
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"Floating": [
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"FloatingPoint.swift",
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"FloatingPointFromString.swift",
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"FloatingPointParsing.swift",
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"FloatingPointToString.swift",
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"FloatingPointTypes.swift",
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"FloatingPointRandom.swift"],
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"Vector": [
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"SIMDIntegerConcreteOperations.swift",
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"SIMDFloatConcreteOperations.swift",
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"SIMDMaskConcreteOperations.swift",
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"SIMDVector.swift",
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"SIMDVectorTypes.swift"
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]}
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],
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"Optional": [
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"Optional.swift"
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],
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"Pointer": [
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"Pointer.swift",
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"SwiftifyImport.swift",
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"TemporaryAllocation.swift",
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"UnsafePointer.swift",
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"UnsafeRawPointer.swift",
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"UnsafeBufferPointer.swift",
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"UnsafeBufferPointerSlice.swift",
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"UnsafeRawBufferPointer.swift"
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],
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"Span": [
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"MutableRawSpan.swift",
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"MutableSpan.swift",
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"OutputRawSpan.swift",
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"OutputSpan.swift",
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"RawSpan.swift",
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"Span.swift"
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],
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"UTF8Span": [
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"UTF8EncodingError.swift",
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"UTF8Span.swift",
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"UTF8SpanBits.swift",
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"UTF8SpanComparisons.swift",
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"UTF8SpanFundamentals.swift",
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"UTF8SpanInternalHelpers.swift",
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"UTF8SpanIterators.swift"
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],
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"Protocols": [
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"CompilerProtocols.swift",
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"ShadowProtocols.swift"
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],
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"Playground": [
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"PlaygroundDisplay.swift"
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],
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"Hashing": [
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"Hashable.swift",
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"Hasher.swift",
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"SipHash.swift",
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"AnyHashable.swift",
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"Hashing.swift",
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"Bitset.swift"
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],
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"Misc": [
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"AtomicInt.swift",
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"Sendable.swift",
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"ErrorType.swift",
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"Identifiable.swift",
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"InputStream.swift",
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"LifetimeManager.swift",
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"Macros.swift",
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"ManagedBuffer.swift",
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"Misc.swift",
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"OptionSet.swift",
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"OutputStream.swift",
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"Policy.swift",
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"Prespecialize.swift",
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"Print.swift",
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"REPL.swift",
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"Random.swift",
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"Runtime.swift",
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"RuntimeFunctionCounters.swift",
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"Shims.swift",
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"StaticPrint.swift",
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"ThreadLocalStorage.swift",
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"Unmanaged.swift",
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"Availability.swift",
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"CommandLine.swift",
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"Tuple.swift",
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"NewtypeWrapper.swift",
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"DebuggerSupport.swift",
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"Equatable.swift",
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"Comparable.swift",
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"Codable.swift",
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"LegacyABI.swift",
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"MigrationSupport.swift",
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"PtrAuth.swift",
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"Duration.swift",
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"DurationProtocol.swift",
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"Instant.swift",
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"EmbeddedRuntime.swift",
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"EmbeddedStubs.swift",
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"EmbeddedPrint.swift",
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"InlineArray.swift",
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"_InlineArray.swift"
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],
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"Result": [
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"Result.swift"
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]
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}
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