C/C++: grouped other functions

Signed-off-by: Nicola Vigano <nicola.vigano@esrf.fr>

git-svn-id: https://svn.code.sf.net/p/dct/code/trunk@308 4c865b51-4357-4376-afb4-474e03ccb993

zUtil_Cxx/gtPrintDataAlignment.c

+/**
+ * Prints to which which multiple of bytes, the array is aligned
+ *
+ * Used just for inquiry purposes.
+ *
+ * Nicola Vigano', 2012, ID11 @ ESRF vigano@esrf.eu
+ */
+
+#include "mex.h"
+
+#define LAST_02_BYTES(x)  (((long unsigned int)x) & 0x1)
+#define LAST_04_BYTES(x)  (((long unsigned int)x) & 0x3)
+#define LAST_08_BYTES(x)  (((long unsigned int)x) & 0x7)
+#define LAST_16_BYTES(x)  (((long unsigned int)x) & 0xF)
+
+const char * const alignedTo(const double * const image_in);
+
+void mexFunction( int nlhs, mxArray * plhs[], int nrhs, const mxArray * prhs[] )
+{
+  /* Pointers to incoming matrices: */
+  const double * const image_in = mxGetPr(prhs[0]);
+
+  mexPrintf("Array starting at address: %p, aligned to %s. SSE friendly: %s\n",
+      image_in, alignedTo(image_in), LAST_16_BYTES(image_in) ? "false" : "true"
+      );
+}
+
+const char * const
+alignedTo(const double * const image_in)
+{
+  if (!(LAST_16_BYTES(image_in))) {
+    return "long double";
+  } else if (!(LAST_08_BYTES(image_in))) {
+    return "double";
+  } else if (!(LAST_04_BYTES(image_in))) {
+    return "float";
+  } else if (!(LAST_02_BYTES(image_in))) {
+    return "short float";
+  } else {
+    return "byte";
+  }
+}