Adds a new helper to swap 128-bit values. It is intended to be used for
GATT 128-bit UUID handling, converting 128-bit UUID from big-endian to
little-endian (or the opposite).
No matter the system, bt_uuid_t should always store 128-bit UUID value
using big-endian format (similar to human-readable format).
---
src/shared/util.h | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/src/shared/util.h b/src/shared/util.h
index cc2dbcd..f9170bb 100644
--- a/src/shared/util.h
+++ b/src/shared/util.h
@@ -91,6 +91,16 @@ void util_debug(util_debug_func_t function, void *user_data,
void util_hexdump(const char dir, const unsigned char *buf, size_t len,
util_debug_func_t function, void *user_data);
+static inline void bswap_128(const void *src, void *dst)
+{
+ const uint8_t *s = src;
+ uint8_t *d = dst;
+ int i;
+
+ for (i = 0; i < 16; i++)
+ d[15 - i] = s[i];
+}
+
static inline void put_le16(uint16_t val, void *dst)
{
put_unaligned(cpu_to_le16(val), (uint16_t *) dst);
--
1.8.3.1
--
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