1 files changed, 111 insertions, 0 deletions
diff --git a/testutil/to-tracee-endian.c b/testutil/to-tracee-endian.c
new file mode 100644
index 0000000..4346883
--- /dev/null
+++ b/testutil/to-tracee-endian.c
@@ -0,0 +1,111 @@
+/* See LICENSE file for copyright and license details. */
+#include "../libsyscalls.h"
+
+#include <errno.h>
+#include <limits.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
+
+
+static void
+make_hex(char *out, const char *in, size_t n)
+{
+	for (; n--; in++) {
+		*out++ = "0123456789ABCDEF"[((unsigned)*in >> 4) & 0xFU];
+		*out++ = "0123456789ABCDEF"[((unsigned)*in >> 0) & 0xFU];
+	}
+	*out = '\0';
+}
+
+
+int
+main(int argc, char **argv)
+{
+	struct libsyscalls_datatype_description type;
+	char *data, *end, *text0, *text1;
+	size_t dataoff, i, datasize;
+	unsigned long long int value;
+	enum libsyscalls_error err;
+
+	_Static_assert(CHAR_BIT, "We only support 8-bit char at the moment in testutil/to-tracee-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
+
+	errno = 0;
+	value = strtoull(argv[1], &end, 16);
+	if (errno || *end)
+		goto usage;
+	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
+
+	datasize = ((size_t)type.width_in_bits + dataoff + 7UL) / 8UL;
+	data = malloc(datasize);
+	text0 = malloc(datasize * 2UL + 1UL);
+	text1 = malloc(datasize * 2UL + 1UL);
+
+	memset(data, 0, datasize);
+	err = libsyscalls_to_tracee_endian(value, &type, data, dataoff);
+	if (err == LIBSYSCALLS_E_INVAL) {
+		printf("inval\n");
+		free(data);
+		goto out;
+	} else if (err) {
+		libsyscalls_perror(NULL, err);
+		return 1;
+	}
+	make_hex(text0, data, datasize);
+
+	memset(data, ~0, datasize);
+	err = libsyscalls_to_tracee_endian(value, &type, data, dataoff);
+	if (err == LIBSYSCALLS_E_INVAL) {
+		printf("inval\n");
+		free(data);
+		goto out;
+	} else if (err) {
+		libsyscalls_perror(NULL, err);
+		return 1;
+	}
+	make_hex(text1, data, datasize);
+
+	free(data);
+
+	printf("%s %s\n", text0, text1);
+
+	free(text0);
+	free(text1);
+
+out:
+	if (fflush(stdout) || fclose(stdout)) {
+		perror(NULL);
+		return 1;
+	}
+	return 0;
+}