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oui_standardize.go
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/
oui_standardize.go
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package main
import (
"os"
"io"
"encoding/csv"
"strings"
"sort"
)
var data []string
func readCSV(file string) {
raw, err := os.Open(file)
if err != nil {panic(err)}
defer raw.Close()
reader := csv.NewReader(raw)
// Skip header line
reader.Read()
for {
// Read CSV line
line, err := reader.Read()
// Validate line
if err == io.EOF {break}
if err != nil {panic(err)}
// Remove multi-line strings from addresses
line[3] = strings.Replace(line[3], "\r", "", -1)
line[3] = strings.Replace(line[3], "\n", " ", -1)
// Null-separated strings, starting with mac prefix
data = append(data, strings.Join([]string{line[1], line[0], line[2], line[3]}, "\x00"))
}
}
func help() {
os.Stdout.WriteString("Usage: oui_standardize [<file>] [<file>] [<file>]...\n")
os.Exit(0)
}
func main() {
//Display help and exit if not enough arguments
if len(os.Args) < 2 {help()}
// Treat arguments as file paths and read all files into data
for i := 1; i < len(os.Args); i++ {readCSV(os.Args[i])}
// Sort data
sort.Strings(data)
// Format and output
for _, line := range data {
fields := strings.Split(line, "\x00")
os.Stdout.WriteString(
"{"+fields[1]+"}{"+fields[0]+"}{"+fields[2]+"}{"+fields[3]+"}"+eol)
}
}