Index: trunk/ippTools/src/pxtools.c
===================================================================
--- trunk/ippTools/src/pxtools.c	(revision 25840)
+++ trunk/ippTools/src/pxtools.c	(revision 25851)
@@ -177,2 +177,116 @@
     return true;
 }
+
+bool pxLookupVersion(pxConfig *config, psArray **pArray)
+{
+    const char *query = "SELECT * FROM dbversion";
+
+    if (!p_psDBRunQuery(config->dbh, query)) {
+        psError(PS_ERR_UNKNOWN, false, "database error");
+        return false;
+    }
+
+    psArray *output = p_psDBFetchResult(config->dbh);
+    if (!output) {
+        psError(PS_ERR_UNKNOWN, false, "database error");
+        return false;
+    }
+    if (!psArrayLength(output)) {
+        psFree(output);
+        psError(PS_ERR_UNKNOWN, true, "no rows in dbversion");
+        return false;
+    }
+    if (psArrayLength(output) > 1) {
+        psError(PS_ERR_UNKNOWN, true, "unexpected number of rows found in dbversion: %" PRId64,
+                psArrayLength(output));
+        return false;
+    }
+    *pArray = output;
+
+    return true;
+}
+
+psString pxGetDBVersion(pxConfig *config)
+{
+    PS_ASSERT_PTR_NON_NULL(config, NULL);
+
+    psArray *array = NULL;
+    if (!pxLookupVersion(config, &array)) {
+        psError(PS_ERR_UNKNOWN, false, "pxLookupVersion failed");
+        return NULL;
+    }
+    psMetadata *md = array->data[0];
+    if (!md) {
+        psError(PS_ERR_UNKNOWN, true, "output of pxLookupVersion is null");
+        return NULL;
+    }
+    
+    psString version = psMetadataLookupStr(NULL, md, "schema_version");
+
+    return version;
+}
+
+bool pxExportVersion(pxConfig *config, FILE *file)
+{
+    PS_ASSERT_PTR_NON_NULL(config, NULL);
+    PS_ASSERT_PTR_NON_NULL(file, NULL);
+
+    psArray *array = NULL;
+    if (!pxLookupVersion(config, &array) || !array) {
+        psError(PS_ERR_UNKNOWN, false, "pxLookupVersion failed");
+        return false;
+    }
+    if (!ippdbPrintMetadatas(file, array, "dbversion", true)) {
+        psError(PS_ERR_UNKNOWN, false, "failed to print array");
+        psFree(array);
+        return false;
+    }
+    return true;
+}
+
+bool pxCheckImportVersion(pxConfig *config, psMetadata *input)
+{
+    PS_ASSERT_PTR_NON_NULL(config, NULL);
+    PS_ASSERT_PTR_NON_NULL(input, NULL);
+
+    // This code was adapted from the way camtool parses the structures.
+    // Is this really the way to do it?
+    psMetadataItem *multi_item =  psMetadataLookup(input, "dbversion");
+    if (!multi_item || (multi_item->type != PS_DATA_METADATA_MULTI)) {
+        psError(PS_ERR_UNKNOWN, true, "dbversion multi not found in input");
+        return false;
+    }
+    
+    psMetadataItem *dbversion = psListGet(multi_item->data.list, 0);
+    if (!dbversion) {
+        psError(PS_ERR_UNKNOWN, true, "dbversion not found in input");
+        return false;
+    }
+
+    if (!strcmp(dbversion->name, "dbversion")) {
+        // horray
+        psMetadata *md = dbversion->data.md;
+        psString schema_version = pxGetDBVersion(config);
+        if (!schema_version) {
+            psError(PS_ERR_UNKNOWN, false, "pxGetDBVersion failed");
+            return false;
+        }
+        
+        psString import_version = psMetadataLookupStr(NULL, md, "schema_version");
+        if (import_version && strcmp(import_version, schema_version)) {
+            psError(PS_ERR_UNKNOWN, true, "input file schema_version: %s does not match data base: %s",
+                import_version, schema_version);
+            return false;
+        } else if (!import_version) {
+            psError(PS_ERR_UNKNOWN, true, "input file schema_version is NULL");
+            return false;
+        } else {
+            // YIPPEE this file is the same version
+        }
+    } else {
+        psError(PS_ERR_UNKNOWN, true, "Unexpected config dump format");
+        return false;
+    }
+
+    return true;
+}