1 files changed, 83 insertions, 0 deletions
diff --git a/testutil/to-tracer-endian.c b/testutil/to-tracer-endian.c
new file mode 100644
index 0000000..53cb380
--- /dev/null
+++ b/testutil/to-tracer-endian.c
@@ -0,0 +1,83 @@
+/* See LICENSE file for copyright and license details. */
+#include "../libsyscalls.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)
+{
+	struct libsyscalls_datatype_description type;
+	const char *text;
+	char *data;
+	size_t dataoff, i;
+	unsigned long long int value;
+	unsigned char high, low;
+	enum libsyscalls_error err;
+
+	_Static_assert(CHAR_BIT, "We only support 8-bit char at the moment in testutil/to-tracer-endian.c");
+
+	if (argc < 5) {
+	usage:
+		fprintf(stderr, "usage error\n");
+		return 1;
+	}
+
+#if defined(__GNUC__)
+# pragma GCC diagnostic push
+# pragma GCC diagnostic ignored "-Wconversion"
+#endif
+
+	text = argv[1];
+	dataoff = (size_t)atol(argv[2]);
+	type.width_in_bits = (unsigned short int)atoi(argv[3]);
+	argv = &argv[4];
+	i = 0;
+	for (; argv[i] && i < sizeof(type.byteorder) / sizeof(*type.byteorder); i++)
+		type.byteorder[i] = (unsigned)atoi(argv[i]);
+	if (argv[i])
+		goto usage;
+	for (; i < sizeof(type.byteorder) / sizeof(*type.byteorder); i++) {
+		type.byteorder[i] = 0U;
+		type.byteorder[i] = ~type.byteorder[i];
+	}
+
+#if defined(__clang__)
+# pragma GCC diagnostic pop
+#endif
+
+	if (strlen(text) & 1 || !strlen(text))
+		goto usage;
+	data = malloc(strlen(text) / 2);
+	for (i = 0; *text; i++) {
+		high = (unsigned char)*text++;
+		low  = (unsigned char)*text++;
+		high = (unsigned char)((high & 15U) + (high > '9' ? 9U : 0U));
+		low  = (unsigned char)((low  & 15U) + (low  > '9' ? 9U : 0U));
+		data[i] = (char)((high << 4) | low);
+	}
+
+	err = libsyscalls_to_tracer_endian(data, dataoff, &type, &value);
+	free(data);
+	if (err == LIBSYSCALLS_E_INVAL) {
+		printf("inval\n");
+		goto out;
+	} else if (err) {
+		libsyscalls_perror(NULL, err);
+		return 1;
+	}
+	printf("%llX\n", value);
+
+out:
+	if (fflush(stdout) || fclose(stdout)) {
+		perror(NULL);
+		return 1;
+	}
+	return 0;
+}