win32: Fix return value for cairo_time_get

Without uint64_t we need to construct a cairo_int64_t from the struct of
smaller 32-bit types rather than just casting the larger 64-bit value.

Reported-by: Hakki Dogusan <dogusanh@tr.net>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

1 files changed, 20 insertions, 1 deletions

diff --git a/src/cairo-time.c b/src/cairo-time.c
index 9a594e8e..a0003fbf 100644
--- a/src/cairo-time.c
+++ b/src/cairo-time.c
@@ -103,6 +103,25 @@ _cairo_time_1s (void)
     return freq.QuadPart;
 }
 
+#ifndef HAVE_UINT64_T
+static cairo_always_inline cairo_time_t
+_cairo_time_from_large_integer (LARGE_INTEGER t)
+{
+    cairo_int64_t r;
+
+    r = _cairo_int64_lsl (_cairo_int32_to_int64 (t.HighPart), 32);
+    r = _cairo_int64_add (r, _cairo_int32_to_int64 (t.LowPart));
+
+    return r;
+}
+#else
+static cairo_always_inline cairo_time_t
+_cairo_time_from_large_integer (LARGE_INTEGER t)
+{
+    return t.QuadPart;
+}
+#endif
+
 cairo_time_t
 _cairo_time_get (void)
 {
@@ -110,7 +129,7 @@ _cairo_time_get (void)
 
     QueryPerformanceCounter (&t);
 
-    return t.QuadPart;
+    return _cairo_time_from_large_integer(t);
 }
 
 #elif defined(CAIRO_CLOCK)