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// Copyright ©2015 The Gonum Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package testlapack
import (
"fmt"
"testing"
"golang.org/x/exp/rand"
"gonum.org/v1/gonum/blas"
)
type Dlacpyer interface {
Dlacpy(uplo blas.Uplo, m, n int, a []float64, lda int, b []float64, ldb int)
}
func DlacpyTest(t *testing.T, impl Dlacpyer) {
rnd := rand.New(rand.NewSource(1))
for _, uplo := range []blas.Uplo{blas.Upper, blas.Lower, blas.All} {
for _, test := range []struct {
m, n, lda, ldb int
}{
{3, 5, 0, 0},
{5, 5, 0, 0},
{7, 5, 0, 0},
{3, 5, 10, 12},
{5, 5, 10, 12},
{7, 5, 10, 12},
} {
m := test.m
n := test.n
lda := test.lda
if lda == 0 {
lda = n
}
ldb := test.ldb
if ldb == 0 {
ldb = n
}
a := make([]float64, m*lda)
for i := range a {
a[i] = rnd.Float64()
}
b := make([]float64, m*ldb)
for i := range b {
b[i] = rnd.Float64()
}
impl.Dlacpy(uplo, m, n, a, lda, b, ldb)
equal := true
switch uplo {
case blas.Upper:
for i := 0; i < m; i++ {
for j := i; j < n; j++ {
if b[i*ldb+j] != a[i*lda+j] {
equal = false
goto DoneCheck
}
}
}
case blas.Lower:
for i := 0; i < m; i++ {
for j := 0; j < min(i, n); j++ {
if b[i*ldb+j] != a[i*lda+j] {
equal = false
goto DoneCheck
}
}
}
case blas.All:
for i := 0; i < m; i++ {
for j := 0; j < n; j++ {
if b[i*ldb+j] != a[i*lda+j] {
equal = false
goto DoneCheck
}
}
}
}
DoneCheck:
if !equal {
fmt.Println(blas.Lower)
t.Errorf("Matrices not equal after copy. Uplo = %d, m = %d, n = %d", uplo, m, n)
}
}
}
}
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