/
matrix_def.go
81 lines (75 loc) · 1.88 KB
/
matrix_def.go
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package builder
import (
"bufio"
"fmt"
"io"
"os"
"strconv"
"strings"
)
// MatrixDef represents matrix.def.
type MatrixDef struct {
rowSize int64
colSize int64
vec []int16
}
func parseMatrixDefFile(path string) (*MatrixDef, error) {
file, err := os.Open(path)
if err != nil {
return nil, err
}
defer file.Close()
return parseMatrix(file)
}
func parseMatrix(r io.Reader) (*MatrixDef, error) {
scanner := bufio.NewScanner(r)
scanner.Scan()
line := scanner.Text()
dim := strings.Split(line, " ")
if len(dim) != 2 {
return nil, fmt.Errorf("invalid format: %s", line)
}
rowSize, err := strconv.ParseInt(dim[0], 10, 0)
if err != nil {
return nil, fmt.Errorf("invalid format: %s, %s", err, line)
}
colSize, err := strconv.ParseInt(dim[1], 10, 0)
if err != nil {
return nil, fmt.Errorf("invalid format: %s, %s", err, line)
}
vec := make([]int16, rowSize*colSize)
for scanner.Scan() {
line := scanner.Text()
ary := strings.Split(line, " ")
if len(ary) != 3 {
return nil, fmt.Errorf("invalid format: %s", line)
}
row, err := strconv.ParseInt(ary[0], 10, 0)
if err != nil {
return nil, fmt.Errorf("invalid format: %s, %s", err, line)
}
if row < 0 || row >= rowSize {
return nil, fmt.Errorf("invalid ID, right-id %d >= row size %d", row, rowSize)
}
col, err := strconv.ParseInt(ary[1], 10, 0)
if err != nil {
return nil, fmt.Errorf("invalid format: %s, %s", err, line)
}
if col < 0 || col >= colSize {
return nil, fmt.Errorf("invalid ID, left-id %d >= col size %d", col, colSize)
}
val, err := strconv.Atoi(ary[2])
if err != nil {
return nil, fmt.Errorf("invalid format: %s, %s", err, line)
}
vec[col*rowSize+row] = int16(val) // transposed
}
if err := scanner.Err(); err != nil {
return nil, fmt.Errorf("invalid format: %s, %s", err, line)
}
return &MatrixDef{
rowSize: rowSize,
colSize: colSize,
vec: vec,
}, nil
}