openalbridge/endianness.c
changeset 2191 20c62f787a4d
child 2200 8192be6e3aef
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/openalbridge/endianness.c	Wed Jun 24 15:59:32 2009 +0000
@@ -0,0 +1,51 @@
+/*
+ * OpenAL Bridge - a simple portable library for OpenAL interface
+ * Copyright (c) 2009 Vittorio Giovara <vittorio.giovara@gmail.com>
+ *
+ * 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; version 2 of the License
+ *
+ * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include "endianness.h"
+
+#ifdef __CPLUSPLUS
+extern "C" {
+#endif 
+	
+	//from big endian to little endian
+	int invert_endianness(int number){
+		uint8_t n1,n2,n3,n4;
+		uint32_t a1,a2,a3,a4;
+		uint32_t done = 0;
+		
+		n1 = number;
+		n2 = number >> 8;
+		n3 = number >> 16;
+		n4 = number >> 24;
+		
+		//printf("%X, %X, %X, %X\n", n1, n2, n3, n4);
+		a1 = (uint32_t) n1 << 24;
+		a2 = (uint32_t) n2 << 16;
+		a3 = (uint32_t) n3 << 8;
+		a4 = (uint32_t) n4;
+		done = a1 + a2 + a3 + a4;
+		//printf("%08X %08X %08X %08X = %08X\n", a1, a2, a3, a4, done);
+		return done;
+	}
+	
+#ifdef __CPLUSPLUS
+}
+#endif
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