From cfdd043e4ec88d94b145ef7cf3e29622b18dbae7 Mon Sep 17 00:00:00 2001
From: John <john@johng.cn>
Date: Wed, 12 Feb 2020 10:48:15 +0800
Subject: [PATCH] add OctStr function for gstr

---
 text/gstr/gstr_convert.go             | 30 +++++++++++++++++++++++++++
 text/gstr/gstr_z_unit_convert_test.go | 22 ++++++++++++++++++++
 2 files changed, 52 insertions(+)
 create mode 100644 text/gstr/gstr_convert.go
 create mode 100644 text/gstr/gstr_z_unit_convert_test.go

diff --git a/text/gstr/gstr_convert.go b/text/gstr/gstr_convert.go
new file mode 100644
index 000000000..357035b65
--- /dev/null
+++ b/text/gstr/gstr_convert.go
@@ -0,0 +1,30 @@
+// Copyright 2019 gf Author(https://github.com/gogf/gf). All Rights Reserved.
+//
+// This Source Code Form is subject to the terms of the MIT License.
+// If a copy of the MIT was not distributed with this file,
+// You can obtain one at https://github.com/gogf/gf.
+
+package gstr
+
+import (
+	"regexp"
+	"strconv"
+)
+
+var (
+	// octReg is the regular expression object for checks octal string.
+	octReg = regexp.MustCompile(`\\[0-7]{3}`)
+)
+
+// OctStr converts string container octal string to its original string,
+// for example, to Chinese string.
+// Eg: `\346\200\241` -> 怡
+func OctStr(str string) string {
+	return octReg.ReplaceAllStringFunc(
+		str,
+		func(s string) string {
+			i, _ := strconv.ParseInt(s[1:], 8, 0)
+			return string([]byte{byte(i)})
+		},
+	)
+}
diff --git a/text/gstr/gstr_z_unit_convert_test.go b/text/gstr/gstr_z_unit_convert_test.go
new file mode 100644
index 000000000..d5d1e3bd4
--- /dev/null
+++ b/text/gstr/gstr_z_unit_convert_test.go
@@ -0,0 +1,22 @@
+// Copyright 2019 gf Author(https://github.com/gogf/gf). All Rights Reserved.
+//
+// This Source Code Form is subject to the terms of the MIT License.
+// If a copy of the MIT was not distributed with this file,
+// You can obtain one at https://github.com/gogf/gf.
+
+// go test *.go -bench=".*"
+
+package gstr_test
+
+import (
+	"testing"
+
+	"github.com/gogf/gf/test/gtest"
+	"github.com/gogf/gf/text/gstr"
+)
+
+func Test_OctStr(t *testing.T) {
+	gtest.Case(t, func() {
+		gtest.Assert(gstr.OctStr(`\346\200\241`), "怡")
+	})
+}