match.go

package fibervhost

import (
	"regexp"
	"strings"
)

const AsteriskRegexp = "/\\\\*/g"
const AsteriskReplace = "([^.]+)"
const EndAnchoredRegexp = "/(?:^|[^\\\\])(?:\\\\\\\\)*\\$$/"
const EscapeRegexp = "/([.+?^=!:${}()|[\\\\]/\\\\])/g"
const EscapeReplace = "\\\\$1"

func compile_regexp(to_match string) (*regexp.Regexp, error) {
	to_match = enforce_start_end_characters(to_match)
	return regexp.Compile(to_match)
}

func string_to_regexp(to_match string) (*regexp.Regexp, error) {
	strings.Replace(to_match, EscapeRegexp, EscapeReplace, 1)
	strings.Replace(to_match, AsteriskRegexp, AsteriskReplace, -1)
	return compile_regexp(to_match)
}

func enforce_start_end_characters(str string) string {
	if string(str[0]) != string("^") {
		str = string("^") + str
	}

	anchor_test := regexp.MustCompile(EndAnchoredRegexp)

	if !anchor_test.MatchString(str) {
		str = str + string("$")
	}
	return str
}

func match(re *regexp.Regexp, str string) bool {
	if re.MatchString(str) {
		return true
	}

	return false
}