1 files changed, 111 insertions, 0 deletions
diff --git a/src/im_bin.cpp b/src/im_bin.cpp
new file mode 100644
index 0000000..de279b5
--- /dev/null
+++ b/src/im_bin.cpp
@@ -0,0 +1,111 @@
+/** \file
+ * \brief Binary Data Utilities
+ *
+ * See Copyright Notice in im_lib.h
+ * $Id: im_bin.cpp,v 1.1 2008/10/17 06:10:16 scuri Exp $
+ */
+
+#include <assert.h>
+
+#include "im_util.h"
+
+
+int imBinCPUByteOrder(void)
+{
+  static int CPUByteOrder = -1;
+
+  if (CPUByteOrder == -1)
+  {
+	  unsigned short w = 0x0001;
+	  unsigned char* b = (unsigned char*)&w;
+	  CPUByteOrder = (b[0] == 0x01)? IM_LITTLEENDIAN: IM_BIGENDIAN;
+  }
+
+  return CPUByteOrder;
+}
+
+void imBinSwapBytes(void *data, int count, int size)
+{
+  switch(size)
+  {
+  case 2:
+    imBinSwapBytes2(data, count);
+    break;
+  case 4:
+    imBinSwapBytes4(data, count);
+    break;
+  case 8:
+    imBinSwapBytes8(data, count);
+    break;
+  }
+}
+
+void imBinSwapBytes2(void *data, int count)
+{
+	assert(data);
+
+	unsigned char lTemp;
+  unsigned char *values = (unsigned char *)data;
+
+	while (count-- != 0)
+	{
+		lTemp = values[1];
+		values[1] = values[0];
+		values[0] = lTemp;
+
+		values += 2;
+	}
+}
+
+void imBinSwapBytes4(void *data, int count)
+{
+	assert(data);
+
+	unsigned char lTemp;
+  unsigned char *values = (unsigned char *)data;
+
+	while (count-- != 0)
+	{
+		lTemp = values[3];
+		values[3] = values[0];
+		values[0] = lTemp;
+
+		lTemp = values[2];
+		values[2] = values[1];
+		values[1] = lTemp;
+
+		values += 4;
+	}
+}
+
+void imBinSwapBytes8(void *data, int count)
+{
+  assert(data);
+
+	unsigned char lTemp;
+  unsigned char *values = (unsigned char *)data;
+	
+	assert(values);
+
+	while (count-- != 0)
+	{
+		lTemp = values[7];
+		values[7] = values[0];
+		values[0] = lTemp;
+
+		lTemp = values[6];
+		values[6] = values[1];
+		values[1] = lTemp;
+
+		lTemp = values[5];
+		values[5] = values[2];
+		values[2] = lTemp;
+
+		lTemp = values[4];
+		values[4] = values[3];
+		values[3] = lTemp;
+
+		values += 8;
+	}
+}
+