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Swift FlatBufferBuilder.sizedByteArray to ByteBuffer.toArray() (#7093)

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* Moved code from FlatBufferBuilder.sizedByteArray to ByteBuffer.toArray() in Swift

* ByteBuffer.toArray() to  ByteBuffer.underlyingBytes
This commit is contained in:
Matt Grippaldi
2022-02-11 16:26:16 -05:00
committed by GitHub
parent 48befb6bef
commit a94132a45f
2 changed files with 11 additions and 6 deletions
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10
swift/Sources/FlatBuffers/ByteBuffer.swift
View File

@@ -387,6 +387,16 @@ public struct ByteBuffer {
removing: _writerSize &- removeBytes) removing: _writerSize &- removeBytes)
} }
/// Returns the written bytes into the ``ByteBuffer``
public var underlyingBytes: [UInt8] {
let cp = capacity &- writerIndex
let start = memory.advanced(by: writerIndex)
.bindMemory(to: UInt8.self, capacity: cp)
let ptr = UnsafeBufferPointer<UInt8>(start: start, count: cp)
return Array(ptr)
}
/// SkipPrefix Skips the first 4 bytes in case one of the following /// SkipPrefix Skips the first 4 bytes in case one of the following
/// functions are called `getPrefixedSizeCheckedRoot` & `getPrefixedSizeRoot` /// functions are called `getPrefixedSizeCheckedRoot` & `getPrefixedSizeRoot`
/// which allows us to skip the first 4 bytes instead of recreating the buffer /// which allows us to skip the first 4 bytes instead of recreating the buffer

7
swift/Sources/FlatBuffers/FlatBufferBuilder.swift
View File

@@ -80,12 +80,7 @@ public struct FlatBufferBuilder {
/// Should only be used after ``finish(offset:addPrefix:)`` is called /// Should only be used after ``finish(offset:addPrefix:)`` is called
public var sizedByteArray: [UInt8] { public var sizedByteArray: [UInt8] {
assert(finished, "Data shouldn't be called before finish()") assert(finished, "Data shouldn't be called before finish()")
let cp = _bb.capacity &- _bb.writerIndex return _bb.underlyingBytes
let start = _bb.memory.advanced(by: _bb.writerIndex)
.bindMemory(to: UInt8.self, capacity: cp)
let ptr = UnsafeBufferPointer(start: start, count: cp)
return Array(ptr)
} }
/// Returns the original ``ByteBuffer`` /// Returns the original ``ByteBuffer``