1 files changed, 84 insertions, 0 deletions
diff --git a/cmdline.c b/cmdline.c
new file mode 100644
index 0000000..182a29d
--- /dev/null
+++ b/cmdline.c
@@ -0,0 +1,84 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+
+
+static enum command command = ANYSUM;
+static enum libhashsum_algorithm algorithm;
+
+
+#define USAGE_COMMON   "[-c [-w]] [-W options] ... [-z] [file] ..."
+#define USAGE_BSUM     "[-l bits] [-S salt] "USAGE_COMMON
+#define USAGE_SHA3SUM  "[-a bits] "USAGE_COMMON
+#define USAGE_KECCAK   "[-R rate] [-C capacity] [-N output-size] [-S state-size] [-W word-size] [-Z squeeze-count] "USAGE_COMMON
+#define USAGE_SHAKE    "[-N output-bits] "USAGE_COMMON
+#define USAGE_RAWSHAKE "[-N output-bits] "USAGE_COMMON
+#define USAGE_ANYSUM   "(-c [-w] | [-a algoritms] ... ) [-W options] ... [-z] [file] ..."
+
+#define static
+NUSAGE(libsimple_default_failure_exit,
+       (command == ANYSUM  ? USAGE_ANYSUM :
+	command == BSUM    ? USAGE_BSUM :
+	command == SHA3SUM ? USAGE_SHA3SUM :
+	(algorithm == LIBHASHSUM_BLAKE224 ||
+	 algorithm == LIBHASHSUM_BLAKE256 ||
+	 algorithm == LIBHASHSUM_BLAKE384 ||
+	 algorithm == LIBHASHSUM_BLAKE512) ? USAGE_BSUM :
+	(algorithm == LIBHASHSUM_SHAKE128 ||
+	 algorithm == LIBHASHSUM_SHAKE256 ||
+	 algorithm == LIBHASHSUM_SHAKE512) ? USAGE_SHAKE :
+	(algorithm == LIBHASHSUM_RAWSHAKE128 ||
+	 algorithm == LIBHASHSUM_RAWSHAKE256 ||
+	 algorithm == LIBHASHSUM_RAWSHAKE512) ? USAGE_RAWSHAKE :
+	algorithm == LIBHASHSUM_KECCAK ? USAGE_KECCAK : USAGE_COMMON));
+#undef static
+
+
+void
+cmdline(int *argcp, char ***argvp, struct config *config)
+{
+	int old_argc = *argcp;
+	int argc = *argcp;
+	char **argv = *argvp;
+	const char *algostr = NULL;
+	char *algostrbuf = NULL;
+
+	argv0 = argv[0];
+	command = getcommand(&algostr, &algorithm);
+	switch (getsupercommand(command, algorithm)) {
+	case BSUM:
+		argc = cmdline_bsum(argc, argv, command, config, &algostr, &algorithm, &algostrbuf);
+		break;
+	case SHA3SUM:
+		argc = cmdline_sha3sum(argc, argv, command, config, &algostr, &algorithm, &algostrbuf);
+		break;
+	case ANYSUM:
+	case SPECIALISED:
+	default:
+		argc = cmdline_other(argc, argv, command, config);
+		break;
+	}
+
+	if (config->warn_improper_format > config->verify)
+		usage();
+
+	if (command == ANYSUM) {
+		if (config->verify && config->nalgorithms)
+			usage();
+		config->format |= WITH_ALGOSTR;
+	}
+	if (!config->verify) {
+		if ((config->format & FORMAT_MASK) == BINARY)
+			config->format &= FORMAT_MASK;
+	}
+
+	if (algostr) {
+		config->algorithms = erealloc(config->algorithms, sizeof(*config->algorithms));
+		(config->algorithms)[0].algostr = algostr;
+		config->nalgorithms = 1U;
+	}
+
+	*argcp = argc;
+	*argvp = &argv[old_argc - argc];
+
+	free(algostrbuf);
+}