clash/component/geodata/utils.go

package geodata

import (
	"github.com/Dreamacro/clash/component/geodata/router"
)

func LoadGeoSiteMatcher(countryCode string) (*router.DomainMatcher, int, error) {
	geoLoaderName := "standard"
	geoLoader, err := GetGeoDataLoader(geoLoaderName)
	if err != nil {
		return nil, 0, err
	}

	domains, err := geoLoader.LoadGeoSite(countryCode)
	if err != nil {
		return nil, 0, err
	}

	/**
	linear: linear algorithm
	matcher, err := router.NewDomainMatcher(domains)
	mph：minimal perfect hash algorithm
	*/
	matcher, err := router.NewMphMatcherGroup(domains)
	if err != nil {
		return nil, 0, err
	}

	return matcher, len(domains), nil
}