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encode.go
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encode.go
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package matrix
import (
"os"
"bytes"
"fmt"
"encoding/gob"
)
func (m *Matrix[T]) Print() {
fmt.Printf("%d-by-%d matrix:\n", m.rows, m.cols)
for i := uint64(0); i < m.rows; i++ {
for j := uint64(0); j < m.cols; j++ {
fmt.Printf("%d ", m.data[i*m.cols+j])
}
fmt.Printf("\n")
}
}
func (m *Matrix[T]) PrintStart() {
fmt.Printf("%d-by-%d matrix:\n", m.rows, m.cols)
for i := uint64(0); i < 2; i++ {
for j := uint64(0); j < 2; j++ {
fmt.Printf("%d ", m.data[i*m.cols+j])
}
fmt.Printf("\n")
}
}
func (m Matrix[T]) GobEncode() ([]byte, error) {
buf := new(bytes.Buffer)
encoder := gob.NewEncoder(buf)
err1 := encoder.Encode(m.rows)
err2 := encoder.Encode(m.cols)
err3 := encoder.Encode(m.data)
if err1 != nil || err2 != nil || err3 != nil {
panic("Gob encoding error")
}
return buf.Bytes(), nil
}
func (m *Matrix[T]) GobDecode(buf []byte) error {
b := bytes.NewBuffer(buf)
decoder := gob.NewDecoder(b)
err1 := decoder.Decode(&m.rows)
err2 := decoder.Decode(&m.cols)
m.data = make([]T, m.rows*m.cols)
err3 := decoder.Decode(&m.data)
if err1 != nil || err2 != nil || err3 != nil {
panic("Gob decoding error")
}
return nil
}
func (m *Matrix[T]) WriteToFile(fn string) error {
f, err := os.Create(fn)
if err != nil {
return err
}
defer f.Close()
return m.WriteToFileDescriptor(f)
}
func (m *Matrix[T]) WriteToFileDescriptor(f *os.File) error {
_, err := fmt.Fprintf(f, "%d,%d\n", m.rows, m.cols)
if err != nil {
return err
}
if (m.rows * m.cols != uint64(len(m.data))) {
panic("Rows/cols do not match data size")
}
for _, elem := range m.data {
_, err = fmt.Fprintf(f, "%d,", elem)
if err != nil {
return err
}
}
return nil
}
func (m *Matrix[T]) ReadFromFile(fn string) error {
f, err := os.Open(fn)
if err != nil {
return err
}
defer f.Close()
return m.ReadFromFileDescriptor(f)
}
func (m *Matrix[T]) ReadFromFileDescriptor(f *os.File) error {
_, err := fmt.Fscanf(f, "%d,%d\n", &m.rows, &m.cols)
if err != nil {
return err
}
m.data = make([]T, m.rows * m.cols)
for i := uint64(0); i < m.rows * m.cols; i++ {
_, err = fmt.Fscanf(f, "%d,", &m.data[i])
if err != nil {
return err
}
}
return nil
}