git: 67163bc485a5 - main - nvmecontrol: Create letoh to generically convert to host order

The branch main has been updated by imp:

URL: https://cgit.FreeBSD.org/src/commit/?id=67163bc485a56d960b72fb26f19685682b92dd6b

commit 67163bc485a56d960b72fb26f19685682b92dd6b
Author:     Warner Losh <imp@FreeBSD.org>
AuthorDate: 2024-04-16 22:35:33 +0000
Commit:     Warner Losh <imp@FreeBSD.org>
CommitDate: 2024-04-17 03:30:17 +0000

    nvmecontrol: Create letoh to generically convert to host order
    
    Using _Generic, create letoh which will generically convert uintXX_t
    types from little endian to host, regardless of the size. This name has
    been floated as a possible addition to endian.h.
    
    Sponsored by:           Netflix
    Discussed with:         jhb
    Reviewed by:            chuck
    Differential Revision:  https://reviews.freebsd.org/D44649
---
 sbin/nvmecontrol/nvmecontrol.h | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/sbin/nvmecontrol/nvmecontrol.h b/sbin/nvmecontrol/nvmecontrol.h
index ce717e5732c3..a098da4c9c45 100644
--- a/sbin/nvmecontrol/nvmecontrol.h
+++ b/sbin/nvmecontrol/nvmecontrol.h
@@ -60,6 +60,17 @@ struct kv_name {
 	const char *name;
 };
 
+/*
+ * Generically convert little endian to host endian, based on the type of the thing
+ * being converted. Use the proposed name for future changes to endian.h.
+ */
+#define letoh(x)							\
+	_Generic(x,							\
+	uint8_t: (x),							\
+	uint16_t: le16toh(x),						\
+	uint32_t: le32toh(x),						\
+	uint64_t: le64toh(x))
+
 const char *kv_lookup(const struct kv_name *kv, size_t kv_count, uint32_t key);
 
 void logpage_register(struct logpage_function *p);