Index: /trunk/psModules/src/pslib/Makefile.am
===================================================================
--- /trunk/psModules/src/pslib/Makefile.am	(revision 6892)
+++ /trunk/psModules/src/pslib/Makefile.am	(revision 6893)
@@ -10,4 +10,5 @@
     psImageUnbin.c \
     psLine.c \
+    psMetadataItemCompare.c \
     psMetadataItemParse.c \
     psPolynomialUtils.c \
@@ -23,4 +24,5 @@
     psImageUnbin.h \
     psLine.h \
+    psMetadataItemCompare.h \
     psMetadataItemParse.h \
     psPolynomialUtils.h \
Index: /trunk/psModules/src/pslib/psMetadataItemCompare.c
===================================================================
--- /trunk/psModules/src/pslib/psMetadataItemCompare.c	(revision 6893)
+++ /trunk/psModules/src/pslib/psMetadataItemCompare.c	(revision 6893)
@@ -0,0 +1,69 @@
+#include <stdio.h>
+#include "pslib.h"
+
+bool psMetadataItemCompare(psMetadataItem *compare, // Item to compare to the template
+                           psMetadataItem *template // The template
+                          )
+{
+
+    // First order checks
+    if (! compare || ! template) {
+        return false;
+    }
+    if (strcmp(compare->name, template->name)
+            != 0) {
+        return false;
+    }
+
+
+    #define COMPARE_CASE(TEMPLATENAME, TEMPLATETYPE, COMPARENAME, COMPARETYPENAME) \
+case PS_TYPE_##COMPARETYPENAME: { \
+        TEMPLATETYPE value = (TEMPLATETYPE)compare->data.COMPARENAME; \
+        if (value != compare->data.COMPARENAME) { \
+            return false; \
+        } \
+        return (template->data.TEMPLATENAME == value) ? true : false; \
+    }
+
+    #define TEMPLATE_CASE(TYPENAME, NAME, TYPE) \
+case PS_TYPE_##TYPENAME: \
+    switch(compare->type) { \
+        COMPARE_CASE(NAME, TYPE, B  , BOOL); \
+        COMPARE_CASE(NAME, TYPE, U8 , U8 ); \
+        COMPARE_CASE(NAME, TYPE, U16, U16); \
+        COMPARE_CASE(NAME, TYPE, U32, U32); \
+        COMPARE_CASE(NAME, TYPE, S8 , S8 ); \
+        COMPARE_CASE(NAME, TYPE, S16, S16); \
+        COMPARE_CASE(NAME, TYPE, S32, S32); \
+        COMPARE_CASE(NAME, TYPE, F32, F32); \
+        COMPARE_CASE(NAME, TYPE, F64, F64); \
+    default: \
+        return false; \
+    }
+
+
+    switch (template->type) {
+        TEMPLATE_CASE(BOOL, B  , psBool)
+        ;
+        TEMPLATE_CASE(U8,   U8 , psU8 );
+        TEMPLATE_CASE(U16,  U16, psU16);
+        TEMPLATE_CASE(U32,  U32, psU32);
+        TEMPLATE_CASE(S8 ,  S8 , psS8 );
+        TEMPLATE_CASE(S16,  S16, psS16);
+        TEMPLATE_CASE(S32,  S32, psS32);
+        TEMPLATE_CASE(F32,  F32, psF32);
+        TEMPLATE_CASE(F64,  F64, psF64);
+    case PS_DATA_STRING:
+        if (compare->type != PS_DATA_STRING) {
+            return false;
+        }
+        psTrace(__func__, 10, "Comparing '%s' with '%s'\n", compare->data.V, template->
+                data.V);
+        return (strcasecmp(compare->data.V, template->
+                           data.V) == 0) ? true : false;
+    default:
+        // Simply don't know how to compare more complex types.
+        return false;
+    }
+    psAbort(__func__, "Should never get here.\n");
+}
Index: /trunk/psModules/src/pslib/psMetadataItemCompare.h
===================================================================
--- /trunk/psModules/src/pslib/psMetadataItemCompare.h	(revision 6893)
+++ /trunk/psModules/src/pslib/psMetadataItemCompare.h	(revision 6893)
@@ -0,0 +1,12 @@
+#ifndef PS_METADATA_ITEM_COMPARE_H
+#define PS_METADATA_ITEM_COMPARE_H
+
+#include "pslib.h"
+
+bool psMetadataItemCompare(psMetadataItem *compare, // Item to compare to the template
+                           psMetadataItem *template // The template
+                          )
+;
+
+
+#endif