Implement WASM compatibility for the areas of the library where we can replace the usage of accelerate, core graphics and implement pure swift/c++ fallbacks or use CLAPACK. There are more changes we have to review, this commit is just to see if we need to iterate and check the CI work

Author: pedrovgs

Sources/Matft/core/object/mfarray.swift

@@ -7,8 +7,12 @@
 //
 
 import Foundation
+#if canImport(Accelerate)
 import Accelerate
+#endif
+#if canImport(CoreML)
 import CoreML
+#endif
 
 open class MfArray: MfArrayProtocol{
     public typealias MFDATA = MfData
@@ -111,6 +115,7 @@ open class MfArray: MfArrayProtocol{
         self.mfstructure = mfstructure//mfstructure will be copied because mfstructure is struct
     }
 
+    #if canImport(CoreML)
     /// Create a VIEW or Copy mfarray from MLShapedArray
     /// - Parameters:
     ///    - base: A base MLShapedArray
@@ -126,6 +131,7 @@ open class MfArray: MfArrayProtocol{
         self.mfdata = mfdata
         self.mfstructure = MfStructure(shape: base.shape.map{ Int(truncating: $0) }, strides: base.strides.map{ Int(truncating: $0) })
     }
+    #endif
 
     deinit {
         self.base = nil

Sources/Matft/core/object/mftype.swift

@@ -7,8 +7,12 @@
 //
 
 import Foundation
+#if canImport(Accelerate)
 import Accelerate
+#endif
+#if canImport(CoreML)
 import CoreML
+#endif
 
 public enum MfType: Int{
     case None
@@ -65,6 +69,7 @@ public enum MfType: Int{
         return MfType.mftype(value: value as Any)
     }
 
+    #if canImport(CoreML)
     @available(macOS 10.13, *)
     @available(iOS 14.0, *)
     static internal func mftype(value: MLMultiArrayDataType) -> MfType{
@@ -77,6 +82,7 @@ public enum MfType: Int{
             return .Object // Not supported
         }
     }
+    #endif
 
     static public func priority(_ a: MfType, _ b: MfType) -> MfType{
         if a.rawValue < b.rawValue{

Sources/Matft/core/protocol/mfdataProtocol.swift

@@ -6,12 +6,16 @@
 //
 
 import Foundation
+#if canImport(CoreML)
 import CoreML
+#endif
 
 public protocol MfDataBasable {}
 
 extension MfData: MfDataBasable{}
 
+#if canImport(CoreML)
 @available(macOS 10.13, *)
 @available(iOS 14.0, *)
 extension MLMultiArray: MfDataBasable{}
+#endif

Sources/Matft/core/protocol/mftypeProtocol.swift

@@ -7,7 +7,53 @@
 //
 
 import Foundation
+#if canImport(Accelerate)
 import Accelerate
+#else
+/// Fallback complex type for non-Apple platforms (split complex format for Float)
+public struct DSPSplitComplex {
+    public var realp: UnsafeMutablePointer<Float>
+    public var imagp: UnsafeMutablePointer<Float>
+
+    public init(realp: UnsafeMutablePointer<Float>, imagp: UnsafeMutablePointer<Float>) {
+        self.realp = realp
+        self.imagp = imagp
+    }
+}
+
+/// Fallback complex type for non-Apple platforms (split complex format for Double)
+public struct DSPDoubleSplitComplex {
+    public var realp: UnsafeMutablePointer<Double>
+    public var imagp: UnsafeMutablePointer<Double>
+
+    public init(realp: UnsafeMutablePointer<Double>, imagp: UnsafeMutablePointer<Double>) {
+        self.realp = realp
+        self.imagp = imagp
+    }
+}
+
+/// Fallback complex type for non-Apple platforms (interleaved complex format for Float)
+public struct DSPComplex {
+    public var real: Float
+    public var imag: Float
+
+    public init(real: Float, imag: Float) {
+        self.real = real
+        self.imag = imag
+    }
+}
+
+/// Fallback complex type for non-Apple platforms (interleaved complex format for Double)
+public struct DSPDoubleComplex {
+    public var real: Double
+    public var imag: Double
+
+    public init(real: Double, imag: Double) {
+        self.real = real
+        self.imag = imag
+    }
+}
+#endif
 /*
 public protocol MfTypable: Numeric{}
 

Sources/Matft/core/util/common/type.swift

@@ -6,7 +6,47 @@
 //
 
 import Foundation
+#if canImport(Accelerate)
 import Accelerate
+#endif
+
+#if !canImport(Accelerate)
+/// Pure Swift fallback for toBool_by_vDSP
+internal func toBool_by_vDSP(_ mfarray: MfArray) -> MfArray {
+    let mfarray = check_contiguous(mfarray)
+    let size = mfarray.storedSize
+    let newdata = MfData(size: size, mftype: .Bool)
+
+    newdata.withUnsafeMutableStartPointer(datatype: Float.self) { dstptr in
+        mfarray.withUnsafeMutableStartPointer(datatype: Float.self) { srcptr in
+            for i in 0..<size {
+                dstptr[i] = srcptr[i] != 0 ? Float(1) : Float(0)
+            }
+        }
+    }
+
+    let newstructure = MfStructure(shape: mfarray.shape, strides: mfarray.strides)
+    return MfArray(mfdata: newdata, mfstructure: newstructure)
+}
+
+/// Pure Swift fallback for toIBool_by_vDSP
+internal func toIBool_by_vDSP(_ mfarray: MfArray) -> MfArray {
+    let mfarray = check_contiguous(mfarray)
+    let size = mfarray.storedSize
+    let newdata = MfData(size: size, mftype: .Bool)
+
+    newdata.withUnsafeMutableStartPointer(datatype: Float.self) { dstptr in
+        mfarray.withUnsafeMutableStartPointer(datatype: Float.self) { srcptr in
+            for i in 0..<size {
+                dstptr[i] = srcptr[i] == 0 ? Float(1) : Float(0)
+            }
+        }
+    }
+
+    let newstructure = MfStructure(shape: mfarray.shape, strides: mfarray.strides)
+    return MfArray(mfdata: newdata, mfstructure: newstructure)
+}
+#endif
 
 internal func to_Bool(_ mfarray: MfArray, thresholdF: Float = 1e-5, thresholdD: Double = 1e-10) -> MfArray{
     //convert float and contiguous

Sources/Matft/core/util/pointer/ptr2array.swift

@@ -7,7 +7,9 @@
 //
 
 import Foundation
+#if canImport(Accelerate)
 import Accelerate
+#endif
 
 //convert rawpointer to flattenarray via float or Double array
 //All kinds of int and uint has been handled as float

Sources/Matft/core/util/pointer/withptr.swift

@@ -6,7 +6,9 @@
 //
 
 import Foundation
+#if canImport(Accelerate)
 import Accelerate
+#endif
 
 extension MfArray{
 

Sources/Matft/core/util/typeconversion.swift

@@ -7,7 +7,10 @@
 //
 
 import Foundation
+#if canImport(Accelerate)
 import Accelerate
+#endif
+// Note: WASI fallback implementations for vDSP functions are defined in vDSP.swift
 
 /// Get mftype from a flatten array
 /// - Parameter flattenArray: Flatten array.

Sources/Matft/function/method/creation+method.swift

@@ -7,7 +7,9 @@
 //
 
 import Foundation
+#if canImport(Accelerate)
 import Accelerate
+#endif
 
 extension MfArray{
     /**

Sources/Matft/function/method/subscript.swift

@@ -7,7 +7,9 @@
 //
 
 import Foundation
+#if canImport(Accelerate)
 import Accelerate
+#endif
 
 extension MfArray: MfSubscriptable{
     public subscript(indices: Int...) -> Any{