Implemented replacement for swab.

[vlc] / compat / swab.c

diff --git a/compat/swab.c b/compat/swab.c
new file mode 100644 (file)
index 0000000..f0f3433
--- /dev/null
+++ b/compat/swab.c
@@ -0,0 +1,43 @@
+/*****************************************************************************
+ * swab.c: swab() replacement
+ *****************************************************************************
+ * Copyright © 2009 the VideoLAN project
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ *****************************************************************************/
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <stdlib.h>
+#include <stdint.h>
+
+void swab( const void *p_src_, void *p_dst_, ssize_t n )
+{
+    const uint8_t *p_src = p_src_;
+    uint8_t *p_dst = p_dst_;
+
+    if( n < 0 )
+        return;
+
+    for( ssize_t i = 0; i < n-1; i += 2 )
+    {
+        uint8_t i_tmp = p_src[i+0];
+        p_dst[i+0] = p_src[i+1];
+        p_dst[i+1] = i_tmp;
+    }
+}
+