Utility to convert oratory1990's CSV measurements to a Room EQ Wizard compatible format

oratory_to_rew.go

// This program converts csv measurements from oratory1990 into a format
// suitable for importing into Room EQ Wizard, with SPL normalized to 90dB.
package main

import (
  "os"
  "io"
  "encoding/csv"
  "fmt"
  "strconv"
  "strings"
)

func main() {
  if len(os.Args) < 2 {
    fmt.Fprintln(os.Stderr, "Please specify the name(s) of one or more input files")
    os.Exit(1)
  }

  for i:=1;i<len(os.Args);i++ {
    filename := os.Args[i]
    in, err := os.Open(filename)
    if err != nil {
      fmt.Fprintf(os.Stderr, "Error opening input file %v: %v\n", filename, err)
      os.Exit(2)
    }
    defer in.Close()

    out, err := os.Create(fmt.Sprintf("%v.txt", filename))
    if err != nil{
      fmt.Fprintf(os.Stderr, "Unable to create out file: %v\n", err)
      os.Exit(3)
    }
    defer out.Close()

    csvIn := csv.NewReader(in)
    csvIn.Comma = ';'

    csvOut := csv.NewWriter(out)
    csvOut.Comma = '\t'
    defer csvOut.Flush()

    for {
      line, err := csvIn.Read()
      if err == io.EOF {
        break
      }
      if len(line) == 2 {
        freq, err := strconv.ParseFloat(strings.Replace(line[0], ",", ".", -1), 64)
        if err != nil {
          continue
        }
        db, err := strconv.ParseFloat(strings.Replace(line[1], ",", ".", -1), 64)
        if err != nil {
          continue
        }
        if err := csvOut.Write([]string{fmt.Sprint(freq), fmt.Sprint(db+90)}); err != nil {
          fmt.Fprintf(os.Stderr, "Unable to write to out: %v", err)
          os.Exit(4)
        }
      }
    }

    fmt.Fprintf(os.Stderr, "Wrote to %v.txt\n", filename)
  }
}