From 6958dea7247c0164b88a1839ddce8f51631cbdc6 Mon Sep 17 00:00:00 2001
From: Leonid Pospelov <leonidpospelov.dev@gmail.com>
Date: Mon, 10 Feb 2025 17:42:27 +0300
Subject: [PATCH] SystemTools: use CopyFile on Windows
---
SystemTools.cxx | 13 ++++++++++++-
1 file changed, 12 insertions(+), 1 deletion(-)
diff --git a/SystemTools.cxx b/SystemTools.cxx
index ef16256..1a7432d 100644
--- a/SystemTools.cxx
+++ b/SystemTools.cxx
@@ -2425,6 +2425,7 @@ SystemTools::CopyStatus SystemTools::CopyFileContentBlockwise(
* operating system mechanisms.
*
* If available, copy-on-write/clone will be used.
+ * On Windows, the CopyFile() is used for fast copy.
* On Linux, the FICLONE ioctl is used to create a clone of the source file.
* On macOS, the copyfile() call is used to make a clone of the file, and
* it will fall back to a regular copy if that's not possible.
@@ -2444,7 +2445,17 @@ SystemTools::CopyStatus SystemTools::CopyFileContentBlockwise(
SystemTools::CopyStatus SystemTools::CloneFileContent(
std::string const& source, std::string const& destination)
{
-#if defined(__linux) && defined(FICLONE)
+#if defined(_WIN32) && !defined(__CYGWIN__)
+ const BOOL bFailIfExists = FALSE;
+
+ std::wstring sourceWide = Encoding::ToWide(source);
+ std::wstring destinationWide = Encoding::ToWide(destination);
+
+ if (!CopyFileW(sourceWide.c_str(), destinationWide.c_str(), bFailIfExists)) {
+ return CopyStatus{ Status::Windows_GetLastError(), CopyStatus::DestPath };
+ }
+ return CopyStatus{ Status::Success(), CopyStatus::NoPath };
+#elif defined(__linux) && defined(FICLONE)
int in = open(source.c_str(), O_RDONLY);
if (in < 0) {
return CopyStatus{ Status::POSIX_errno(), CopyStatus::SourcePath };
--
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