Initial source commit

minorGems/io/linux/TypeIOLinux.cpp

@@ -0,0 +1,132 @@
+/*
+ * Modification History
+ *
+ * 2001-February-3		Jason Rohrer
+ * Created.
+ * Fixed a bug in the big-endian code.
+ * Fixed parameter names to match convention.
+ *
+ * 2001-February-26		Jason Rohrer
+ * Fixed a bug in the little-endian implementation.
+ *
+ * 2001-August-28		Jason Rohrer
+ * Changed to be FreeBSD compatible. 
+ *
+ * 2002-March-13   Jason Rohrer
+ * Started to change to work with solaris.
+ * Finished changing to work with solaris.
+ *
+ * 2002-April-11   Jason Rohrer
+ * Added a default BSD case to work with OSX.
+ *
+ * 2002-May-25   Jason Rohrer
+ * Changed to use minorGems endian.h
+ */
+ 
+ 
+#include "minorGems/io/TypeIO.h"
+#include "minorGems/system/endian.h"
+
+
+
+
+/*
+ * Linux-specific type input and output.
+ * Note that all types are output in the order that
+ * a big-endian linux machine outputs them with no conversion.
+ */ 
+
+
+
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+
+
+void TypeIO::doubleToBytes( double inDouble, unsigned char *outBytes ) {
+	
+	unsigned char *doubleBuffer = (unsigned char*)( &inDouble );
+	
+	// output second word first
+	outBytes[0] = doubleBuffer[7];
+	outBytes[1] = doubleBuffer[6];
+	outBytes[2] = doubleBuffer[5];
+	outBytes[3] = doubleBuffer[4];
+	
+	outBytes[4] = doubleBuffer[3];
+	outBytes[5] = doubleBuffer[2];
+	outBytes[6] = doubleBuffer[1];
+	outBytes[7] = doubleBuffer[0];
+	}
+
+
+
+double TypeIO::bytesToDouble( unsigned char *inBytes ) {
+	
+	double returnValue;
+	
+	unsigned char *doubleBuffer = (unsigned char*)( &returnValue );
+	
+	// put first word at the end of this double
+	doubleBuffer[7] = inBytes[0];
+	doubleBuffer[6] = inBytes[1];
+	doubleBuffer[5] = inBytes[2];
+	doubleBuffer[4] = inBytes[3];
+	
+	doubleBuffer[3] = inBytes[4];
+	doubleBuffer[2] = inBytes[5];
+	doubleBuffer[1] = inBytes[6];
+	doubleBuffer[0] = inBytes[7];
+	
+	return returnValue;
+	}
+
+
+
+#endif
+
+
+
+#if __BYTE_ORDER == __BIG_ENDIAN
+
+
+
+void TypeIO::doubleToBytes( double inDouble, unsigned char *outBytes ) {
+	
+	unsigned char *doubleBuffer = (unsigned char*)( &inDouble );
+	
+	// output in stored order
+	outBytes[0] = doubleBuffer[0];
+	outBytes[1] = doubleBuffer[1];
+	outBytes[2] = doubleBuffer[2];
+	outBytes[3] = doubleBuffer[3];
+	
+	outBytes[4] = doubleBuffer[4];
+	outBytes[5] = doubleBuffer[5];
+	outBytes[6] = doubleBuffer[6];
+	outBytes[7] = doubleBuffer[7];
+	}
+
+
+
+double TypeIO::bytesToDouble( unsigned char *inBytes ) {
+	
+	double returnValue;
+	
+	unsigned char *doubleBuffer = (unsigned char*)( &returnValue );
+	
+	// store in input order
+	doubleBuffer[0] = inBytes[0];
+	doubleBuffer[1] = inBytes[1];
+	doubleBuffer[2] = inBytes[2];
+	doubleBuffer[3] = inBytes[3];
+	
+	doubleBuffer[4] = inBytes[4];
+	doubleBuffer[5] = inBytes[5];
+	doubleBuffer[6] = inBytes[6];
+	doubleBuffer[7] = inBytes[7];
+	
+	return returnValue;
+	}
+	
+	
+	
+#endif