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Added `log10InPlace` to ‘Logarithm.swift’ & made `log10` into thin wrapper

This commit is contained in:
Vincent Esche 2019-09-24 18:05:02 +02:00
parent 055d1c3c7f
commit ba4e250f2f
1 changed files with 26 additions and 16 deletions
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42
Sources/Surge/Logarithm/Logarithm.swift
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@ -95,26 +95,36 @@ func log2InPlace<L: UnsafeMutableMemoryAccessible>(_ lhs: inout L) where L.Eleme
// MARK: - Base-10 Logarithm
/// - Warning: does not support memory stride (assumes stride is 1).
public func log10<X: UnsafeMemoryAccessible>(_ x: X) -> [Float] where X.Element == Float {
return x.withUnsafeMemory { xm in
precondition(xm.stride == 1, "\(#function) does not support strided memory access")
var results = [Float](x)
results.withUnsafeMutableBufferPointer { rbp in
vvlog10f(rbp.baseAddress!, xm.pointer, [numericCast(xm.count)])
}
return results
public func log10<L: UnsafeMemoryAccessible>(_ lhs: L) -> [Float] where L.Element == Float {
var results = Array(lhs)
log10InPlace(&results)
return results
}
/// - Warning: does not support memory stride (assumes stride is 1).
public func log10<L: UnsafeMemoryAccessible>(_ lhs: L) -> [Double] where L.Element == Double {
var results = Array(lhs)
log10InPlace(&results)
return results
}
// MARK: - Base-10 Logarithm: In Place
/// - Warning: does not support memory stride (assumes stride is 1).
func log10InPlace<L: UnsafeMutableMemoryAccessible>(_ lhs: inout L) where L.Element == Float {
withUnsafeMutableMemory(&lhs) { lm in
precondition(lm.stride == 1, "\(#function) does not support strided memory access")
var elementCount: Int32 = numericCast(lm.count)
vvlog10f(lm.pointer, lm.pointer, &elementCount)
}
}
/// - Warning: does not support memory stride (assumes stride is 1).
public func log10<X: UnsafeMemoryAccessible>(_ x: X) -> [Double] where X.Element == Double {
return x.withUnsafeMemory { xm in
precondition(xm.stride == 1, "\(#function) does not support strided memory access")
var results = [Double](x)
results.withUnsafeMutableBufferPointer { rbp in
vvlog10(rbp.baseAddress!, xm.pointer, [numericCast(xm.count)])
}
return results
func log10InPlace<L: UnsafeMutableMemoryAccessible>(_ lhs: inout L) where L.Element == Double {
withUnsafeMutableMemory(&lhs) { lm in
precondition(lm.stride == 1, "\(#function) does not support strided memory access")
var elementCount: Int32 = numericCast(lm.count)
vvlog10(lm.pointer, lm.pointer, &elementCount)
}
}