github.com/jingcheng-WU/gonum@v0.9.1-0.20210323123734-f1a2a11a8f7b/lapack/testlapack/fortran.go (about)

     1  // Copyright ©2015 The Gonum Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package testlapack
     6  
     7  import (
     8  	"fmt"
     9  	"strings"
    10  )
    11  
    12  // This file implements types for helping to convert to Fortran testing capabilities.
    13  
    14  // fortran64 is a float64 type that prints as a double precision constant in
    15  // Fortran format.
    16  type fortran64 float64 //nolint:unused
    17  
    18  func (f fortran64) String() string {
    19  	// Replace exponent with D
    20  	s := fmt.Sprintf("%0.16E", f)
    21  	s = strings.Replace(s, "E", "D", 1)
    22  	return s
    23  }
    24  
    25  // printFortranArray prints a Go slice as an array that can be copied into a
    26  // fortran script.
    27  //nolint:deadcode,unused
    28  func printFortranArray(z []float64, name string) {
    29  	fmt.Printf("%s(1:%d) = (/%v, &\n", name, len(z), fortran64(z[0]))
    30  	for i := 1; i < len(z)-1; i++ {
    31  		fmt.Printf("%v, &\n", fortran64(z[i]))
    32  	}
    33  	fmt.Printf("%s/)\n", fortran64(z[len(z)-1]))
    34  }