X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=blobdiff_plain;f=compat%2Fmingw.c;h=9a8e3365827d303c6513475726113a3952fe0040;hb=48c250a121a425a1860226b6a7061aecfbab5246;hp=f90a114b021d32c2ee1976bf51a82e87a81ea1cb;hpb=909376a1c9078b7bb7b420113efa956b130e8809;p=git.git

diff --git a/compat/mingw.c b/compat/mingw.c
index f90a114b0..9a8e33658 100644
--- a/compat/mingw.c
+++ b/compat/mingw.c
@@ -140,6 +140,23 @@ int mingw_open (const char *filename, int oflags, ...)
 	return fd;
 }
 
+#undef write
+ssize_t mingw_write(int fd, const void *buf, size_t count)
+{
+	/*
+	 * While write() calls to a file on a local disk are translated
+	 * into WriteFile() calls with a maximum size of 64KB on Windows
+	 * XP and 256KB on Vista, no such cap is placed on writes to
+	 * files over the network on Windows XP.  Unfortunately, there
+	 * seems to be a limit of 32MB-28KB on X64 and 64MB-32KB on x86;
+	 * bigger writes fail on Windows XP.
+	 * So we cap to a nice 31MB here to avoid write failures over
+	 * the net without changing the number of WriteFile() calls in
+	 * the local case.
+	 */
+	return write(fd, buf, min(count, 31 * 1024 * 1024));
+}
+
 #undef fopen
 FILE *mingw_fopen (const char *filename, const char *otype)
 {