From 142d16c8a0fd7c02a0cb195ae6929eadae522fb4 Mon Sep 17 00:00:00 2001
From: Katayama Hirofumi MZ <katayama.hirofumi.mz@gmail.com>
Date: Fri, 1 Nov 2019 04:41:48 +0900
Subject: [PATCH] [NOTEPAD] Prioritize ASCII over UTF-8 (#2006)

CORE-16467
---
 base/applications/notepad/text.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/base/applications/notepad/text.c b/base/applications/notepad/text.c
index d22cf4817ee..0afdde89b6c 100644
--- a/base/applications/notepad/text.c
+++ b/base/applications/notepad/text.c
@@ -48,6 +48,19 @@ static BOOL Append(LPWSTR *ppszText, DWORD *pdwTextLen, LPCWSTR pszAppendText, D
     return TRUE;
 }
 
+BOOL IsTextNonZeroASCII(const void *pText, DWORD dwSize)
+{
+    const signed char *pBytes = pText;
+    while (dwSize-- > 0)
+    {
+        if (*pBytes <= 0)
+            return FALSE;
+
+        ++pBytes;
+    }
+    return TRUE;
+}
+
 ENCODING AnalyzeEncoding(const char *pBytes, DWORD dwSize)
 {
     INT flags = IS_TEXT_UNICODE_STATISTICS;
@@ -55,6 +68,11 @@ ENCODING AnalyzeEncoding(const char *pBytes, DWORD dwSize)
     if (dwSize <= 1)
         return ENCODING_ANSI;
 
+    if (IsTextNonZeroASCII(pBytes, dwSize))
+    {
+        return ENCODING_ANSI;
+    }
+
     if (IsTextUnicode(pBytes, dwSize, &flags))
     {
         return ENCODING_UTF16LE;