From a3b3ef1417e9698b02c60cb3ef3e0ec018d667bd Mon Sep 17 00:00:00 2001
From: wangcong <wangcong@uniontech.com>
Date: Tue, 31 Oct 2023 11:10:34 +0800
Subject: [PATCH] fix: Roll back gb18030 midification
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Description: iconv底层适配GB18030-2022标准,回退上层应用GB18030修改。当处于2005标准时
仍会强制使用上层修改补丁以适配2022标准。

Log: Roll back gb18030 midification
---
 3rdparty/terminalwidget/lib/Emulation.cpp | 44 ++++++++++++++++++++++-
 3rdparty/terminalwidget/lib/Emulation.h   |  8 +++++
 2 files changed, 51 insertions(+), 1 deletion(-)

diff --git a/3rdparty/terminalwidget/lib/Emulation.cpp b/3rdparty/terminalwidget/lib/Emulation.cpp
index 9601f2396..827a13e7e 100644
--- a/3rdparty/terminalwidget/lib/Emulation.cpp
+++ b/3rdparty/terminalwidget/lib/Emulation.cpp
@@ -298,6 +298,44 @@ void Emulation::sendMouseEvent(int /*buttons*/, int /*column*/, int /*row*/, int
     // default implementation does nothing
 }
 
+static int isUse2005Standard = -1;
+/**
+   @brief 检测当前iconv使用的GB18030编码是否为2005标准，2005标准强制使用上层补丁版本
+        通过检测2005和2022编码转的差异，以附录D中的编码为例验证
+        2005标准 0xFE51 --> \u20087
+        2022标准 0xFE51 --> \uE816
+   @return iconv使用GB18030编码是否为2005标准，默认返回true
+ */
+bool Emulation::detectIconvUse2005Standard()
+{
+    iconv_t handle = iconv_open("UTF-8", "GB18030");
+    if (handle == reinterpret_cast<iconv_t>(-1)) {
+        return true;
+    }
+
+    QByteArray input("\xFE\x51");
+    QByteArray output(input.size() * 2, 0);
+    char *inputData = input.data();
+    char *outputData = output.data();
+    size_t inputLen = static_cast<size_t>(input.count());
+    size_t outputLen = static_cast<size_t>(output.count());
+
+    const size_t ret = iconv(handle, &inputData, &inputLen, &outputData, &outputLen);
+    iconv_close(handle);
+
+    if (ret == static_cast<size_t>(-1)) {
+        return true;
+    }
+
+    if (!output.contains("\uE816")) {
+        qInfo() << "Current iconv gb18030 standard is 2005.";
+        return true;
+    }
+
+    qInfo() << "Current iconv gb18030 standard is 2022.";
+    return false;
+}
+
 /*
    We are doing code conversion from locale to unicode first.
 TODO: Character composition from the old code.  See #96536
@@ -338,7 +376,11 @@ void Emulation::receiveData(const char *text, int length, bool isCommandExec)
         //setIsCodecGB18030(false);
     }
     else {
-        if(_codec->name().toUpper().contains("GB18030")) {
+        if(isUse2005Standard == -1){
+            isUse2005Standard = detectIconvUse2005Standard();
+            qInfo() << "Is Used 2005 standard's gb18030 iconv?" << isUse2005Standard;
+        }
+        if(_codec->name().toUpper().contains("GB18030") && isUse2005Standard == 1) {
             //setIsCodecGB18030(true);
             QByteArray gbkarr(text, length);
             QByteArray Outdata;
diff --git a/3rdparty/terminalwidget/lib/Emulation.h b/3rdparty/terminalwidget/lib/Emulation.h
index e4b533b75..7fab156e9 100644
--- a/3rdparty/terminalwidget/lib/Emulation.h
+++ b/3rdparty/terminalwidget/lib/Emulation.h
@@ -515,6 +515,14 @@ public slots:
     /*const */KeyboardTranslator *_keyTranslator; // the keyboard layout
     /********************* Modify by ut000610 daizhengwen End ************************/
 
+    /**
+       @brief 检测当前iconv使用的GB18030编码是否为2005标准，2005标准强制使用上层补丁版本
+            通过检测2005和2022编码转的差异，以附录D中的编码为例验证
+            2005标准 0xFE51 --> \u20087
+            2022标准 0xFE51 --> \uE816
+       @return iconv使用GB18030编码是否为2005标准，默认返回true
+     */
+    bool detectIconvUse2005Standard();
 protected slots:
     /**
      * Schedules an update of attached views.