Milestone 5: deliver embedded RDP sessions and lifecycle hardening

third_party/FreeRDP/libfreerdp/primitives/prim_sign.c

@@ -0,0 +1,50 @@
+/* FreeRDP: A Remote Desktop Protocol Client
+ * Sign operations.
+ * vi:ts=4 sw=4:
+ *
+ * (c) Copyright 2012 Hewlett-Packard Development Company, L.P.
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License. You may obtain
+ * a copy of the License at http://www.apache.org/licenses/LICENSE-2.0.
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+ * or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+
+#include <freerdp/config.h>
+
+#include <freerdp/types.h>
+#include <freerdp/primitives.h>
+
+#include "prim_internal.h"
+#include "prim_sign.h"
+
+/* ----------------------------------------------------------------------------
+ * Set pDst to the sign-value of the 16-bit values in pSrc (-1, 0, or 1).
+ */
+static pstatus_t general_sign_16s(const INT16* WINPR_RESTRICT pSrc, INT16* WINPR_RESTRICT pDst,
+                                  UINT32 len)
+{
+	while (len--)
+	{
+		INT16 src = *pSrc++;
+		*pDst++ = WINPR_ASSERTING_INT_CAST(int16_t, (src < 0) ? (-1) : ((src > 0) ? 1 : 0));
+	}
+
+	return PRIMITIVES_SUCCESS;
+}
+
+/* ------------------------------------------------------------------------- */
+void primitives_init_sign(primitives_t* WINPR_RESTRICT prims)
+{
+	/* Start with the default. */
+	prims->sign_16s = general_sign_16s;
+}
+
+void primitives_init_sign_opt(primitives_t* WINPR_RESTRICT prims)
+{
+	primitives_init_sign(prims);
+	primitives_init_sign_ssse3(prims);
+}