remove undefined behavior
diff --git a/skeletons/NativeEnumerated_oer.c b/skeletons/NativeEnumerated_oer.c
index b1f67c2..8760005 100644
--- a/skeletons/NativeEnumerated_oer.c
+++ b/skeletons/NativeEnumerated_oer.c
@@ -9,6 +9,30 @@
#include <NativeEnumerated.h>
#include <errno.h>
+/*
+ * This function is only to get rid of Undefined Behavior Sanitizer warning.
+ */
+static intmax_t CLANG_NO_SANITIZE("shift-base")
+asn__safe_nativeenumerated_convert_helper(const uint8_t *b,
+ const uint8_t *end) {
+ intmax_t value;
+
+ /* Perform the sign initialization */
+ /* Actually value = -(*b >> 7); gains nothing, yet unreadable! */
+ if((*b >> 7)) {
+ value = -1;
+ } else {
+ value = 0;
+ }
+
+ /* Conversion engine */
+ for(; b < end; b++) {
+ value = (value << 8) | *b;
+ }
+
+ return value;
+}
+
asn_dec_rval_t
NativeEnumerated_decode_oer(const asn_codec_ctx_t *opt_codec_ctx,
asn_TYPE_descriptor_t *td,
@@ -42,7 +66,7 @@
*/
size_t length = *b & 0x7f;
const uint8_t *bend;
- long value;
+ intmax_t value;
if(length < 1 || length > sizeof(*native)) {
ASN__DECODE_FAILED;
@@ -52,10 +76,8 @@
}
b++;
bend = b + length;
- value = (*b & 0x80) ? -1 : 0; /* Determine sign */
- for(; b < bend; b++)
- value = (value << 8) | *b;
+ value = asn__safe_nativeenumerated_convert_helper(b, bend);
if(value < 0) {
const asn_INTEGER_specifics_t *specs =
(const asn_INTEGER_specifics_t *)td->specifics;