Initial commit

[com/gs-lite.git] / src / lib / gscplftaaux / rts_byteswap.c

diff --git a/src/lib/gscplftaaux/rts_byteswap.c b/src/lib/gscplftaaux/rts_byteswap.c
new file mode 100644 (file)
index 0000000..cae7ea2
--- /dev/null
+++ b/src/lib/gscplftaaux/rts_byteswap.c
@@ -0,0 +1,42 @@
+#include "gsconfig.h"
+#include "gstypes.h"
+
+/* ------------------------------------------------
+Copyright 2014 AT&T Intellectual Property
+   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.
+ ------------------------------------------- */
+
+
+gs_int16_t gscpbswap16(gs_int16_t x){
+        return ((x << 8) & 0xff00) | ((x >> 8) & 0x00ff);
+}
+
+gs_int32_t gscpbswap32(gs_int32_t x ) {
+    return     ((x << 24) & 0xff000000 ) |
+       ((x <<  8) & 0x00ff0000 ) |
+       ((x >>  8) & 0x0000ff00 ) |
+       ((x >> 24) & 0x000000ff );
+}
+
+
+gs_int64_t gscpbswap64(gs_int64_t x) {
+    gs_uint64_t t1;
+    gs_uint64_t t2;
+    t1=x>>32;
+    t1 = gscpbswap32(t1);
+    t2=x & 0xffffffff;
+    t2 = gscpbswap32(t2);
+    x = t2<<32;
+    x = x|t1;
+    return x;
+}