From 3cd720c68efea60a0ee3f6413b55e63a80778c66 Mon Sep 17 00:00:00 2001
From: Hatter Jiang <jht5945@gmail.com>
Date: Fri, 1 May 2020 20:40:09 +0800
Subject: [PATCH] add gbk_to_utf8_bytes

---
 encoding/src/main.rs | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/encoding/src/main.rs b/encoding/src/main.rs
index 2e0108b..2e038fd 100644
--- a/encoding/src/main.rs
+++ b/encoding/src/main.rs
@@ -5,6 +5,13 @@ use encoding::{
     DecoderTrap,
 };
 
+fn gbk_to_utf8_bytes(b: &[u8]) -> Option<Vec<u8>> {
+    match GBK.decode(b, DecoderTrap::Strict) {
+        Err(_) => None,
+        Ok(s) => Some(s.as_bytes().to_vec()),
+    }
+}
+
 fn main() -> Result<(), Box<dyn std::error::Error>> {
     let h_china = GBK.encode("Hello 中国", EncoderTrap::Strict)?;
 
@@ -14,5 +21,10 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
     println!("{:?}", h_china);
     println!("{:?}", d_china);
 
+    let utf8_vec = gbk_to_utf8_bytes(&h_china[..]);
+    if let Some(u8_vec) = utf8_vec {
+        println!("{:?}", String::from_utf8(u8_vec)?);
+    }
+
     Ok(())
 }