1 files changed, 56 insertions, 0 deletions
diff --git a/testutil/make-signed.c b/testutil/make-signed.c
new file mode 100644
index 0000000..7cd0134
--- /dev/null
+++ b/testutil/make-signed.c
@@ -0,0 +1,56 @@
+/* See LICENSE file for copyright and license details. */
+#include "../libsyscalls.h"
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#if defined(__clang__)
+# pragma clang diagnostic ignored "-Wunsafe-buffer-usage" /* clang is just being silly */
+#endif
+
+
+int
+main(int argc, char **argv)
+{
+	int sign, neg = -1;
+	size_t bits;
+	const char *xval;
+	enum libsyscalls_error err;
+	unsigned long long int value;
+	char *end;
+
+	if (argc != 4) {
+	usage:
+		fprintf(stderr, "usage error\n");
+		return 1;
+	}
+
+	sign = atoi(argv[1]);
+	bits = (unsigned long long int)atoll(argv[2]);
+	xval = argv[3];
+	neg = *xval == '-';
+	xval = &xval[neg];
+	errno = 0;
+	value = strtoull(xval, &end, 16);
+	if (errno || *end)
+		goto usage;
+
+	err = libsyscalls_make_signed_integer(value, neg, (enum libsyscalls_datatype_sign_representation)sign, bits, &value);
+	if (err == LIBSYSCALLS_E_INVAL) {
+		printf("inval\n");
+		goto out;
+	} else if (err) {
+		libsyscalls_perror(NULL, err);
+		return 1;
+	}
+	printf("%0*llX\n", (int)strlen(xval), value);
+
+out:
+	if (fflush(stdout) || fclose(stdout)) {
+		perror(NULL);
+		return 1;
+	}
+	return 0;
+}