From: Brad King <brad.king@kitware.com>
Date: Wed, 11 Nov 2009 14:19:40 +0000 (-0500)
Subject: Provide SetFilePointerEx for VS 6
X-Git-Tag: v2.8.0~179
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5092d2474addd3ca6ffa3b97e3059c712604e6c5;p=thirdparty%2Flibarchive.git

Provide SetFilePointerEx for VS 6

Visual Studio 6 does not provide SetFilePointerEx in its Windows API.
We implement it in terms of SetFilePointer for that compiler.

SVN-Revision: 1636
---

diff --git a/libarchive/archive_windows.c b/libarchive/archive_windows.c
index 176f2c6e5..2970c4961 100644
--- a/libarchive/archive_windows.c
+++ b/libarchive/archive_windows.c
@@ -60,6 +60,24 @@
 
 #define EPOC_TIME ARCHIVE_LITERAL_ULL(116444736000000000)
 
+#if defined(_MSC_VER) && _MSC_VER < 1300
+/* VS 6 does not provide SetFilePointerEx, so define it here.  */
+static BOOL SetFilePointerEx(HANDLE hFile,
+                             LARGE_INTEGER liDistanceToMove,
+                             PLARGE_INTEGER lpNewFilePointer,
+                             DWORD dwMoveMethod)
+{
+	LARGE_INTEGER li;
+	li.QuadPart = liDistanceToMove.QuadPart;
+	li.LowPart = SetFilePointer(
+	    hFile, li.LowPart, &li.HighPart, dwMoveMethod);
+	if(lpNewFilePointer) {
+		lpNewFilePointer->QuadPart = li.QuadPart;
+	}
+	return li.LowPart != -1 || GetLastError() == NO_ERROR;
+}
+#endif
+
 struct ustat {
 	int64_t		st_atime;
 	uint32_t	st_atime_nsec;