exifgps-fixup.go

package main

import "os"
import "log"
import "github.com/cznic/kv"
import "bytes"
import "strconv"

func usage() {
	log.Fatalf(`Usage: exifgps-fixup FILE`)
}
func main() {
	var err error
	prefix := []byte("exifgps|")
	if len(os.Args) != 2 {
		usage()
	}

	opts := kv.Options{}
	db, err := kv.Open(os.Args[1], &opts)
	if err != nil {
		log.Fatalln(err)
	}
	defer db.Close()

	enum, _, err := db.Seek(prefix)
	if err != nil {
		log.Fatalln(err)
	}
	for true {
		var k, v []byte
		k, v, err = enum.Next()
		if err != nil || !bytes.HasPrefix(k, prefix) {
			break
		}

		pipe := bytes.IndexByte(v, '|')
		if pipe < 0 {
			log.Printf("bogus row %q = %q", k, v)
			continue
		}
		_, err := strconv.ParseFloat(string(v[:pipe]), 64)
		_, err1 := strconv.ParseFloat(string(v[pipe+1:]), 64)
		if err != nil || err1 != nil {
			log.Printf("deleting bogus row %q = %q", k, v)
			err = db.Delete(k)
			if err != nil {
				log.Fatalln(err)
			}
		}
	}
}