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iploc-gen.go
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iploc-gen.go
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package main
import (
"bytes"
"compress/zlib"
"fmt"
"io"
"os"
"strconv"
"text/template"
"github.com/kayon/iploc"
flag "github.com/spf13/pflag"
)
const (
goFilename = "iploc-binary.go"
goFileTPL = `// generated by iploc-gen
package {{ .Package }}
import (
"github.com/kayon/iploc"
)
var IPLoc *iploc.Locator
func init() {
var err error
if IPLoc, err = iploc.{{ .Method }}([]byte({{ .Dat }})); err != nil {
panic(err)
}
}`
)
var (
qqwrySrc string
pkgName string
noIndex bool
help bool
file = template.Must(template.New("file").Parse(goFileTPL))
)
func init() {
flag.StringVarP(&pkgName, "pkg", "p", "main", "package name")
flag.BoolVarP(&noIndex, "no-index", "n", false, "initialization with OpenWithoutIndexes")
flag.BoolVarP(&help, "help", "h", false, "this help")
flag.Usage = func() {
fmt.Fprintf(os.Stderr, "iploc-gen: convert iploc and DAT into Go source code.\nUsage: iploc-gen [DAT path] [arguments]\nOptions:\n")
flag.PrintDefaults()
}
flag.Parse()
qqwrySrc = flag.Arg(0)
if qqwrySrc == "" || help {
flag.Usage()
if help {
os.Exit(0)
}
os.Exit(1)
}
}
type Content struct {
Dat string
}
func main() {
p, err := iploc.NewParser(qqwrySrc, true)
if err != nil {
fmt.Fprintf(os.Stderr, err.Error())
os.Exit(1)
}
f, err := os.Create(goFilename)
if err != nil {
fmt.Fprintf(os.Stderr, err.Error())
os.Exit(1)
}
defer f.Close()
buffer := bytes.NewBuffer(nil)
cw, _ := zlib.NewWriterLevel(buffer, zlib.BestCompression)
_, err = io.Copy(cw, p.Reader())
cw.Close()
if err != nil {
fmt.Fprintf(os.Stderr, err.Error())
os.Exit(1)
}
var method = "Load"
if noIndex {
method = "LoadWithoutIndexes"
}
file.Execute(f, map[string]string{"Package": pkgName, "Dat": strconv.QuoteToASCII(buffer.String()), "Method": method})
}