github.com/tawesoft/golib/v2@v2.10.0/legacy/operator/float32.go

package operator

// Code generated by (tawesoft.co.uk/go/operator) template-numbers.py: DO NOT EDIT.

import "math"

// Some overflow checks with reference to stackoverflow.com/a/1514309/5654201

type float32Unary struct {
    Identity        func(float32) float32
    Abs             func(float32) float32
    Negation        func(float32) float32
    Zero            func(float32) bool
    NonZero         func(float32) bool
    Positive        func(float32) bool
    Negative        func(float32) bool
}

type float32UnaryChecked struct {
    Abs             func(float32) (float32, error)
    Negation        func(float32) (float32, error)
}

type float32Binary struct {
    Add             func(float32, float32) float32
    Sub             func(float32, float32) float32
    Mul             func(float32, float32) float32
    Div             func(float32, float32) float32
    Mod             func(float32, float32) float32
    
    Eq              func(float32, float32) bool
    Neq             func(float32, float32) bool
    Lt              func(float32, float32) bool
    Lte             func(float32, float32) bool
    Gt              func(float32, float32) bool
    Gte             func(float32, float32) bool
    
    
}

type float32BinaryChecked struct {
    Add             func(float32, float32) (float32, error)
    Sub             func(float32, float32) (float32, error)
    Mul             func(float32, float32) (float32, error)
    Div             func(float32, float32) (float32, error)
    
}

type float32Nary struct {
    Add             func(... float32) float32
    Sub             func(... float32) float32
    Mul             func(... float32) float32
}

type float32NaryChecked struct {
    Add             func(... float32) (float32, error)
    Sub             func(... float32) (float32, error)
    Mul             func(... float32) (float32, error)
}

// Float32 implements operations on one (unary), two (binary), or many (nary) arguments of type float32.
var Float32 = struct {
    Unary           float32Unary
    Binary          float32Binary
    Nary            float32Nary
    Reduce          func(operatorIdentity float32, operator func(float32, float32) float32, elements ... float32) float32
}{
    Unary:          float32Unary{
        Identity:   func(a float32) float32 { return a },
        Abs:        float32UnaryAbs,
        Negation:   func(a float32) float32 { return -a },
        Zero:       func(a float32) bool { return a == 0 },
        NonZero:    func(a float32) bool { return a != 0 },
        Positive:   float32UnaryPositive,
        Negative:   float32UnaryNegative,
    },
    
    Binary:          float32Binary{
        Add:        func(a float32, b float32) float32 { return a + b },
        Sub:        func(a float32, b float32) float32 { return a - b },
        Mul:        func(a float32, b float32) float32 { return a * b },
        Div:        func(a float32, b float32) float32 { return a / b },
        
        Eq:         func(a float32, b float32) bool { return a == b },
        Neq:        func(a float32, b float32) bool { return a != b },
        Lt:         func(a float32, b float32) bool { return a <  b },
        Lte:        func(a float32, b float32) bool { return a <= b },
        Gt:         func(a float32, b float32) bool { return a >  b },
        Gte:        func(a float32, b float32) bool { return a >= b },
        
        
    },
    
    Nary:           float32Nary{
        Add:        float32NaryAdd,
        Mul:        float32NaryMul,
    },
    
    Reduce:         float32Reduce,
}

// Float32Checked implements operations on one (unary), two (binary), or many (nary) arguments of type float32, returning an
// error in cases such as overflow or an undefined operation.
var Float32Checked = struct {
    Unary           float32UnaryChecked
    Binary          float32BinaryChecked
    Nary            float32NaryChecked
    Reduce          func(operatorIdentity float32, operator func(float32, float32) (float32, error), elements ... float32) (float32, error)
}{
    Unary:          float32UnaryChecked{
        Abs:        float32UnaryCheckedAbs,
        Negation:   float32UnaryCheckedNegation,
    },
    
    Binary:         float32BinaryChecked{
        Add:        float32BinaryCheckedAdd,
        Sub:        float32BinaryCheckedSub,
        Mul:        float32BinaryCheckedMul,
        Div:        float32BinaryCheckedDiv,
    },
    
    Nary:           float32NaryChecked{
        Add:        float32NaryCheckedAdd,
        Mul:        float32NaryCheckedMul,
    },
    
    Reduce:         float32CheckedReduce,
}

func float32UnaryPositive(a float32) bool {
    return math.Signbit(float64(a)) == false
}

func float32UnaryNegative(a float32) bool {
    return math.Signbit(float64(a)) == true
}

func float32UnaryAbs(a float32) float32 {
    return float32(math.Abs(float64(a)))
}

// note abs(+/- Inf) = +Inf
func float32UnaryCheckedAbs(a float32) (v float32, err error) {
    if math.IsNaN(float64(a)) { return v, ErrorNaN }
    return float32(math.Abs(float64(a))), nil
}

func float32UnaryCheckedNegation(a float32) (v float32, err error) {
    if math.IsNaN(float64(a)) { return v, ErrorNaN }
    return -a, nil
}

func float32BinaryCheckedAdd(a float32, b float32) (v float32, err error) {
    if (b > 0) && (a > (maxFloat32 - b)) { return v, ErrorOverflow }
    if (b < 0) && (a < (minFloat32 - b)) { return v, ErrorOverflow }
    return a + b, nil
}

func float32BinaryCheckedSub(a float32, b float32) (v float32, err error) {
    if (b < 0) && (a > (maxFloat32 + b)) { return v, ErrorOverflow }
    if (b > 0) && (a < (minFloat32 + b)) { return v, ErrorOverflow }
    return a - b, nil
}

func float32BinaryCheckedMul(a float32, b float32) (v float32, err error) {
    if (a > (maxFloat32 / b)) { return v, ErrorOverflow }
    if (a < (minFloat32 / b)) { return v, ErrorOverflow }
    
    return a * b, nil
}

func float32BinaryCheckedDiv(a float32, b float32) (v float32, err error) {
    if math.IsNaN(float64(a)) { return v, ErrorNaN }
    if (b == 0) { return v, ErrorUndefined }
    
    return a / b, nil
}



func float32NaryAdd(xs ... float32) (result float32) {
    for i := 0; i < len(xs); i++ {
        result += xs[i]
    }
    return result
}

func float32NaryCheckedAdd(xs ... float32) (result float32, err error) {
    for i := 0; i < len(xs); i++ {
        result, err = float32BinaryCheckedAdd(result, xs[i])
        if err != nil { return result, err }
    }
    return result, nil
}

func float32NaryMul(xs ... float32) (result float32) {
    result = 1
    for i := 0; i < len(xs); i++ {
        result *= xs[i]
    }
    return result
}

func float32NaryCheckedMul(xs ... float32) (result float32, err error) {
    result = 1
    for i := 0; i < len(xs); i++ {
        result, err = float32BinaryCheckedMul(result, xs[i])
        if err != nil { return result, err }
    }
    return result, nil
}

func float32Reduce(operatorIdentity float32, operator func(float32, float32) float32, elements ... float32) (result float32) {
    result = operatorIdentity
    for i := 0; i < len(elements); i++ {
        result = operator(result, elements[i])
    }
    return result
}

func float32CheckedReduce(operatorIdentity float32, operator func(float32, float32) (float32, error), elements ... float32) (result float32, err error) {
    result = operatorIdentity
    for i := 0; i < len(elements); i++ {
        result, err = operator(result, elements[i])
        if err != nil { return result, err }
    }
    return result, err
}