1 files changed, 48 insertions, 0 deletions
diff --git a/common.h b/common.h
new file mode 100644
index 0000000..e3182dc
--- /dev/null
+++ b/common.h
@@ -0,0 +1,48 @@
+/* See LICENSE file for copyright and license details. */
+#include <libkeccak.h>
+#include <argparser.h>
+
+#define libkeccak_spec_keccak   libkeccak_spec_sha3
+#define LIBKECCAK_KECCAK_SUFFIX ""
+
+
+/**
+ * Wrapper for `run` that also initialises the command line parser
+ * 
+ * @param  algo    The name of the hashing algorithm, must be a string literal
+ * @param  prog    The name of program, must be a string literal
+ * @param  suffix  The message suffix
+ */
+#define RUN(algo, prog, suffix)\
+	(args_init(algo " checksum calculator",\
+	           prog " [options...] [--] [files...]", NULL,\
+	           NULL, 1, 0, args_standard_abbreviations),\
+	 run(argc, argv, &spec, suffix))
+
+
+/**
+ * Print the checksum in binary
+ */
+#define REPRESENTATION_BINARY 0
+
+/**
+ * Print the checksum in upper case hexadecimal
+ */
+#define REPRESENTATION_UPPER_CASE 1
+
+/**
+ * Print the checksum in lower case hexadecimal
+ */
+#define REPRESENTATION_LOWER_CASE 2
+
+
+/**
+ * Parse the command line and calculate the hashes of the selected files
+ * 
+ * @param   argc    The first argument from `main`
+ * @param   argv    The second argument from `main`
+ * @param   gspec   The default algorithm parameters
+ * @param   suffix  Message suffix
+ * @return          An appropriate exit value
+ */
+int run(int argc, char *argv[], libkeccak_generalised_spec_t *restrict gspec, const char *restrict suffix);