From 1b20c7312fa2e03f4fbc11d81415043d5c30a3e2 Mon Sep 17 00:00:00 2001
From: Katayama Hirofumi MZ <katayama.hirofumi.mz@gmail.com>
Date: Thu, 9 Feb 2023 21:54:20 +0900
Subject: [PATCH] [NOTEPAD] Treat empty file correctly (#5057)

#5012 had a regression on opening an empty file.
CORE-14641, CORE-18826
---
 base/applications/notepad/text.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/base/applications/notepad/text.c b/base/applications/notepad/text.c
index 3ce3a889bfe..0025ddf9dac 100644
--- a/base/applications/notepad/text.c
+++ b/base/applications/notepad/text.c
@@ -179,6 +179,22 @@ ReadText(HANDLE hFile, HLOCAL *phLocal, ENCODING *pencFile, EOLN *piEoln)
     if (dwSize == INVALID_FILE_SIZE)
         goto done;
 
+    if (dwSize == 0) // If file is empty
+    {
+        hNewLocal = LocalReAlloc(*phLocal, sizeof(UNICODE_NULL), LMEM_MOVEABLE);
+        pszNewText = LocalLock(hNewLocal);
+        if (hNewLocal == NULL || pszNewText == NULL)
+            goto done;
+
+        *pszNewText = UNICODE_NULL;
+        LocalUnlock(hNewLocal);
+
+        *phLocal = hNewLocal;
+        *piEoln = EOLN_CRLF;
+        *pencFile = ENCODING_UTF8;
+        return TRUE;
+    }
+
     hMapping = CreateFileMappingW(hFile, NULL, PAGE_READONLY, 0, 0, NULL);
     if (hMapping == NULL)
         goto done;