diff options
| author | Ian Moffett <ian@osmora.org> | 2025-06-22 20:17:27 -0400 |
|---|---|---|
| committer | Ian Moffett <ian@osmora.org> | 2025-06-22 20:32:01 -0400 |
| commit | 549a3f6ea5e13e39f006125c0f46b79645384604 (patch) | |
| tree | 9b0a1acac582dce63509968879696ea527892d7d | |
| parent | ee365c6d442dbcffd05a64e6a8132f2ecbda79f6 (diff) | |
sys: param: Add PTR_NOFFSET define to sub pointers
Signed-off-by: Ian Moffett <ian@osmora.org>
| -rw-r--r-- | sys/include/sys/param.h | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/sys/include/sys/param.h b/sys/include/sys/param.h index c0a5686..7331d5f 100644 --- a/sys/include/sys/param.h +++ b/sys/include/sys/param.h @@ -67,8 +67,12 @@ /* Gives 1 if pointer is aligned */ #define PTR_ALIGNED(PTR, ALIGN) (!((uintptr_t)PTR & (ALIGN - 1))) -/* Adds a value to a pointer */ +/* + * PTR_OFFSET: Adds an offset to the pointer + * PTR_NOFFSET: Subtracts a negative offset from the pointer + */ #define PTR_OFFSET(PTR, OFF) ((void *)((uintptr_t)PTR + OFF)) +#define PTR_NOFFSET(PTR, NOFF) ((void *)((uintptr_t)PTR - NOFF)) #define NELEM(a) (sizeof(a) / sizeof(a[0])) |