111 lines
2.7 KiB
Go
111 lines
2.7 KiB
Go
/*
|
|
Copyright © 2026 filifa
|
|
|
|
This program is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation, either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
package cmd
|
|
|
|
import (
|
|
"bufio"
|
|
"fmt"
|
|
"os"
|
|
"strconv"
|
|
|
|
"github.com/spf13/cobra"
|
|
"scm.dairydemon.net/filifa/mathtools/internal/lib"
|
|
)
|
|
|
|
var convolveA string
|
|
var convolveB string
|
|
|
|
func readSequenceFromFile(filepath string) ([]complex128, error) {
|
|
// initial length 1 so index math works
|
|
seq := make([]complex128, 1)
|
|
file, err := os.Open(filepath)
|
|
if err != nil {
|
|
return seq, err
|
|
}
|
|
defer file.Close()
|
|
|
|
lines := splitLines(file)
|
|
for _, line := range lines {
|
|
x, err := strconv.ParseComplex(line, 128)
|
|
if err != nil {
|
|
return seq, err
|
|
}
|
|
|
|
seq = append(seq, x)
|
|
}
|
|
|
|
return seq, nil
|
|
}
|
|
|
|
func convolve(cmd *cobra.Command, args []string) {
|
|
a, err := readSequenceFromFile(convolveA)
|
|
if err != nil {
|
|
cobra.CheckErr(err)
|
|
}
|
|
|
|
b, err := readSequenceFromFile(convolveB)
|
|
if err != nil {
|
|
cobra.CheckErr(err)
|
|
}
|
|
|
|
bufStdout := bufio.NewWriter(os.Stdout)
|
|
defer bufStdout.Flush()
|
|
|
|
for i, n := range lib.DirichletConvolve(a, b) {
|
|
if i == 0 {
|
|
continue
|
|
}
|
|
|
|
if imag(n) == 0 {
|
|
fmt.Fprintln(bufStdout, real(n))
|
|
} else {
|
|
fmt.Fprintln(bufStdout, n)
|
|
}
|
|
}
|
|
}
|
|
|
|
// convolveCmd represents the convolve command
|
|
var convolveCmd = &cobra.Command{
|
|
Use: "convolve",
|
|
Short: "Compute the Dirichlet convolution of two sequences",
|
|
Long: `Compute the Dirichlet convolution of two sequences.
|
|
|
|
Each sequence is provided as a file, where line k of the file gives the kth term of the sequence.
|
|
`,
|
|
Run: convolve,
|
|
}
|
|
|
|
func init() {
|
|
rootCmd.AddCommand(convolveCmd)
|
|
|
|
// Here you will define your flags and configuration settings.
|
|
|
|
// Cobra supports Persistent Flags which will work for this command
|
|
// and all subcommands, e.g.:
|
|
// convolveCmd.PersistentFlags().String("foo", "", "A help for foo")
|
|
|
|
// Cobra supports local flags which will only run when this command
|
|
// is called directly, e.g.:
|
|
// convolveCmd.Flags().BoolP("toggle", "t", false, "Help message for toggle")
|
|
|
|
convolveCmd.Flags().StringVarP(&convolveA, "first", "a", "", "first sequence")
|
|
convolveCmd.MarkFlagRequired("first")
|
|
|
|
convolveCmd.Flags().StringVarP(&convolveB, "second", "b", "", "second sequence")
|
|
convolveCmd.MarkFlagRequired("second")
|
|
}
|