From 58ddf2365aa4d2a19a50824596a715a75ae5b3f9 Mon Sep 17 00:00:00 2001
From: lensfrex <lensferno@outlook.com>
Date: Sat, 12 Nov 2022 16:12:32 +0800
Subject: [PATCH] backup2

---
 app/cmd/main.go      | 36 +++++++++++++++++++++++++++++++++
 app/encode/encode.go | 47 ++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 83 insertions(+)
 create mode 100644 app/encode/encode.go

diff --git a/app/cmd/main.go b/app/cmd/main.go
index 7905807..e4c25ec 100644
--- a/app/cmd/main.go
+++ b/app/cmd/main.go
@@ -1,5 +1,41 @@
 package main
 
+import (
+	"fmt"
+)
+
 func main() {
+	a := "123456"
+	b := true
+
+	fmt.Println(s(a, b))
+}
+
+func s(origin string, b bool) (result []rune) {
+	data := []rune(origin)
+	dataLen := len(origin)
+
+	resultLen := (dataLen / 4) + 1
+	if b {
+		result = make([]rune, resultLen+1)
+		result[resultLen] = rune(resultLen)
+	} else {
+		result = make([]rune, resultLen)
+	}
+
+	for i := 0; i < dataLen; i += 4 {
+		result[i>>2] =
+			getCharAt(data, i, dataLen) | getCharAt(data, i+1, dataLen)<<8 | getCharAt(data, i+2, dataLen)<<16 |
+				getCharAt(data, i+3, dataLen)<<24
+	}
+
+	return result
+}
 
+func getCharAt(str []rune, index int, length int) rune {
+	if index >= length {
+		return 0
+	} else {
+		return str[index]
+	}
 }
diff --git a/app/encode/encode.go b/app/encode/encode.go
new file mode 100644
index 0000000..95dce10
--- /dev/null
+++ b/app/encode/encode.go
@@ -0,0 +1,47 @@
+package encode
+
+func XEncode(str string, key string) string {
+
+}
+
+func s(origin string, b bool) (result []rune) {
+	data := []rune(origin)
+	dataLen := len(origin)
+
+	resultLen := (dataLen / 4) + 1
+	if b {
+		result = make([]rune, resultLen+1)
+		result[resultLen] = rune(resultLen)
+	} else {
+		result = make([]rune, resultLen)
+	}
+
+	for i := 0; i < dataLen; i += 4 {
+		result[i>>2] = get(data, i, dataLen) | get(data, i+1, dataLen)<<8 | get(data, i+2, dataLen)<<16 | get(data, i+3, dataLen)<<24
+	}
+
+	return result
+}
+
+func l(a string, b bool) (result []rune) {
+	d := len(a)
+	data := []rune(a)
+
+	c := d - 1<<2
+
+	if b {
+		m := int(data[d-1])
+		if m < c-3 || m > c {
+			return nil
+		}
+		c = m
+	}
+}
+
+func get(str []rune, index int, length int) rune {
+	if index >= length {
+		return 0
+	} else {
+		return str[index]
+	}
+}