From: Donatas Abraitis <donatas@opensourcerouting.org>
Date: Wed, 12 Oct 2022 18:03:42 +0000 (+0300)
Subject: lib: Add ptr_get_be64() function
X-Git-Tag: base_8.5~283^2~2
X-Git-Url: https://git.puffer.fish/?a=commitdiff_plain;h=0c969118c70fec5289e557ad22a6653b0a02e80b;p=mirror%2Ffrr.git

lib: Add ptr_get_be64() function

Get a single uint64_t value from two uint32_t values.

Signed-off-by: Donatas Abraitis <donatas@opensourcerouting.org>
---

diff --git a/lib/stream.h b/lib/stream.h
index 35733e7438..a3c148c9c9 100644
--- a/lib/stream.h
+++ b/lib/stream.h
@@ -386,6 +386,18 @@ extern void stream_fifo_free(struct stream_fifo *fifo);
  * bit), for 64-bit values (you need to cast them anyway), and neither for
  * encoding (because it's downcasted.)
  */
+static inline const uint8_t *ptr_get_be64(const uint8_t *ptr, uint64_t *out)
+{
+	uint32_t tmp1, tmp2;
+
+	memcpy(&tmp1, ptr, sizeof(tmp1));
+	memcpy(&tmp2, ptr + sizeof(tmp1), sizeof(tmp1));
+
+	*out = (((uint64_t)ntohl(tmp1)) << 32) | ntohl(tmp2);
+
+	return ptr + 8;
+}
+
 static inline const uint8_t *ptr_get_be32(const uint8_t *ptr, uint32_t *out)
 {
 	uint32_t tmp;