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lib/proginfo.c

@@ -0,0 +1,52 @@
+/* Copyright (C) GCK
+ *
+ * This file is part of gcklib
+ *
+ * This project and file is licensed under the BSD-3-Clause licence.
+ * <https://opensource.org/licence/bsd-3-clause>
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "../config.h"
+
+#include "proginfo.h"
+
+const char *prog_name = "";
+
+void set_prog_name(const char *name)
+{
+	prog_name = prog_name ? name : "";
+}
+
+void emit_try_help()
+{
+	printf("Try '%s --help' for more information\n", prog_name);
+}
+
+void emit_version()
+{
+	printf("\
+%s %s %d\n\
+Copyright (C) %d GCK.\n\
+This is free software: you are free to change and redistribute it.\n\
+There is NO WARRNTY, to the extent permitted by law.\n\
+",
+	       prog_name, VERSION, COMMIT, YEAR);
+}
+
+int parse_standard_options(int argc, char **argv, void (*usage)(int),
+			   void (*version)())
+{
+	for (int i = 0; i < argc; ++i) {
+		if (!strcmp(argv[i], "--help")) {
+			usage(0);
+			exit(EXIT_SUCCESS);
+		} else if (!strcmp(argv[i], "--version")) {
+			emit_version();
+			exit(EXIT_SUCCESS);
+		}
+	}
+	return 0;
+}