31 void usage(const char* message, ...) {  in usage()  function
477         usage("At most one occurrence of --encode --encodeNoHeader or --decode is allowed.\n");  in multipleEncodeDecodeCheck()
501                     usage("Only one -o flag allowed.");  in main()
504                     usage("Expected outfile after -o");  in main()
521                         usage("Only one --showDifference option allowed.\n");  in main()
525                         usage("Expected difffile after --showDifference");  in main()
529                     usage( NULL);  in main()
531                     usage("Unknown flag %s", pArg);  in main()
536                 usage("Unknown flag %s", pArg);  in main()
541                 usage(  in main()
554         usage("--showDifference is only valid when encoding.");  in main()
558         usage("Expected an input file.");  in main()
567             usage("Could not change extension of input file name: %s\n", pInput);  in main()