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101 lines
2.8 KiB
Go
101 lines
2.8 KiB
Go
// Copyright 2017-2018 gf Author(https://gitee.com/johng/gf). All Rights Reserved.
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//
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// This Source Code Form is subject to the terms of the MIT License.
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// If a copy of the MIT was not distributed with this file,
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// You can obtain one at https://gitee.com/johng/gf.
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// 正则表达式.
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package gregex
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import (
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"gitee.com/johng/gf/g/container/gmap"
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"regexp"
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)
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// 缓存对象，主要用于缓存底层regx对象
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var regxCache = gmap.NewStringInterfaceMap(true)
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// 根据pattern生成对应的regexp正则对象
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func getRegexp(pattern string) (*regexp.Regexp, error) {
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if v := regxCache.Get(pattern); v != nil {
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return v.(*regexp.Regexp), nil
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}
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if r, err := regexp.Compile(pattern); err == nil {
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regxCache.Set(pattern, r)
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return r, nil
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} else {
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return nil, err
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}
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}
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// 转移正则规则字符串，例如：Quote(`[foo]`) 返回 `\[foo\]`
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func Quote(s string) string {
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return regexp.QuoteMeta(s)
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}
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// 校验所给定的正则表达式是否符合规范
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func Validate(pattern string) error {
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_, err := getRegexp(pattern)
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return err
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}
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// 正则表达式是否匹配
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func IsMatch(pattern string, src []byte) bool {
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if r, err := getRegexp(pattern); err == nil {
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return r.Match(src)
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}
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return false
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}
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func IsMatchString(pattern string, src string) bool {
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return IsMatch(pattern, []byte(src))
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}
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// 正则匹配，并返回匹配的列表
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func MatchString(pattern string, src string) ([]string, error) {
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if r, err := getRegexp(pattern); err == nil {
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return r.FindStringSubmatch(src), nil
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} else {
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return nil, err
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}
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}
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func MatchAllString(pattern string, src string) ([][]string, error) {
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if r, err := getRegexp(pattern); err == nil {
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return r.FindAllStringSubmatch(src, -1), nil
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} else {
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return nil, err
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}
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}
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// 正则替换(全部替换)
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func Replace(pattern string, replace, src []byte) ([]byte, error) {
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if r, err := getRegexp(pattern); err == nil {
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return r.ReplaceAll(src, replace), nil
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} else {
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return nil, err
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}
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}
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// 正则替换(全部替换)，字符串
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func ReplaceString(pattern, replace, src string) (string, error) {
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r, e := Replace(pattern, []byte(replace), []byte(src))
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return string(r), e
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}
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// 正则替换(全部替换)，给定自定义替换方法
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func ReplaceFunc(pattern string, src []byte, repl func(b []byte) []byte) ([]byte, error) {
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if r, err := getRegexp(pattern); err == nil {
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return r.ReplaceAllFunc(src, repl), nil
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} else {
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return nil, err
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}
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}
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// 正则替换(全部替换)，给定自定义替换方法
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func ReplaceStringFunc(pattern string, src string, repl func(s string) string) (string, error) {
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bytes, err := ReplaceFunc(pattern, []byte(src), func(bytes []byte) []byte {
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return []byte(repl(string(bytes)))
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})
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return string(bytes), err
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} |