+/*
+ This validates the arg index is in range (< argc). If it is not
+ valid, the a message is issued and we abort.
+*/
+static void vet_ai( int ai, int argc, char* arg0 ) {
+ if( ai < argc && ai > 0 ) {
+ return;
+ }
+
+ fprintf( stderr, "abort: command line parameter(s) missing\n" );
+ usage( arg0 );
+ exit( 1 );
+}
+