// Gulu - Golang common utilities for everyone.
// Copyright (c) 2019-present, b3log.org
//
// Gulu is licensed under Mulan PSL v2.
// You can use this software according to the terms and conditions of the Mulan PSL v2.
// You may obtain a copy of Mulan PSL v2 at:
//         http://license.coscl.org.cn/MulanPSL2
// THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT, MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
// See the Mulan PSL v2 for more details.

package gulu

import "unicode"

// IsNumOrLetter checks the specified rune is number or letter.
func (*GuluRune) IsNumOrLetter(r rune) bool {
	return ('0' <= r && '9' >= r) || Rune.IsLetter(r)
}

// IsLetter checks the specified rune is letter.
func (*GuluRune) IsLetter(r rune) bool {
	return 'a' <= r && 'z' >= r || 'A' <= r && 'Z' >= r
}

// ContainChinese checks the specified string whether contains chinese.
func (*GuluRune) ContainChinese(str string) bool {
	var count int
	for _, v := range str {
		if unicode.Is(unicode.Han, v) {
			count++
			break
		}
	}
	return count > 0
}
