[newlib-cygwin/main] Cygwin: fhandler_base::open: move O_TRUNC comment into O_TRUNC case

[Corinna Vinschen]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=9e6193576f341f1d1a8caefb7a4ae4b7b5407e74

commit 9e6193576f341f1d1a8caefb7a4ae4b7b5407e74
Author:     Corinna Vinschen <corinna@vinschen.de>
AuthorDate: Tue Apr 8 15:54:42 2025 +0200
Commit:     Corinna Vinschen <corinna@vinschen.de>
CommitDate: Tue Apr 8 16:06:20 2025 +0200

    Cygwin: fhandler_base::open: move O_TRUNC comment into O_TRUNC case
    
    Signed-off-by: Corinna Vinschen <corinna@vinschen.de>

Diff:
---
 winsup/cygwin/fhandler/base.cc | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/winsup/cygwin/fhandler/base.cc b/winsup/cygwin/fhandler/base.cc
index 36d814bf3543..32aca2c51a62 100644
--- a/winsup/cygwin/fhandler/base.cc
+++ b/winsup/cygwin/fhandler/base.cc
@@ -769,18 +769,17 @@ fhandler_base::open (int flags, mode_t mode)
 	set_created_file_access (fh, pc, mode);
     }
 
-  /* If you O_TRUNC a file on Linux, the data is truncated, but the EAs are
-     preserved.  If you open a file on Windows with FILE_OVERWRITE{_IF} or
-     FILE_SUPERSEDE, all streams are truncated, including the EAs.  So we don't
-     use the FILE_OVERWRITE{_IF} flags, but instead just open the file and set
-     the size of the data stream explicitely to 0.  Apart from being more Linux
-     compatible, this implementation has the pleasant side-effect to be more
-     than 5% faster than using FILE_OVERWRITE{_IF} (tested on W7 32 bit). */
   if ((flags & O_TRUNC)
       && (flags & O_ACCMODE) != O_RDONLY
       && io.Information != FILE_CREATED
       && get_device () == FH_FS)
     {
+      /* If you O_TRUNC a file on Linux, the data is truncated, but the EAs are
+	 preserved.  If you open a file on Windows with FILE_OVERWRITE{_IF} or
+	 FILE_SUPERSEDE, all streams are truncated, including the EAs.  So we
+	 don't use FILE_OVERWRITE{_IF} but just open the file and truncate the
+	 data stream to size 0.  Apart from being more Linux compatible, this
+	 has the pleasant side-effect to be more than 5% faster. */
       FILE_END_OF_FILE_INFORMATION feofi = { EndOfFile:{ QuadPart:0 } };
       status = NtSetInformationFile (fh, &io, &feofi, sizeof feofi,
 				     FileEndOfFileInformation);