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| author | Bram Moolenaar <Bram@vim.org> | 2016-07-17 20:37:43 +0200 |
|---|---|---|
| committer | Bram Moolenaar <Bram@vim.org> | 2016-07-17 20:37:43 +0200 |
| commit | 840268400dc8fda62a14f8a084e8b1ea46619454 (patch) | |
| tree | b0e1ff5ffdb4a9cf5862d41f6a1f3e11f27f3ff1 /src/macros.h | |
| parent | e87e6dddc2b2a99572ec0db0833c052214c4fbd3 (diff) | |
patch 7.4.2062v7.4.2062
Problem: Using dummy variable to compute struct member offset.
Solution: Use offsetof().
Diffstat (limited to 'src/macros.h')
| -rw-r--r-- | src/macros.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/src/macros.h b/src/macros.h index ca54cb42e0..ae784d6cc1 100644 --- a/src/macros.h +++ b/src/macros.h @@ -353,3 +353,14 @@ # endif # endif #endif + +/* + * In a hashtab item "hi_key" points to "di_key" in a dictitem. + * This avoids adding a pointer to the hashtab item. + * DI2HIKEY() converts a dictitem pointer to a hashitem key pointer. + * HIKEY2DI() converts a hashitem key pointer to a dictitem pointer. + * HI2DI() converts a hashitem pointer to a dictitem pointer. + */ +# define DI2HIKEY(di) ((di)->di_key) +# define HIKEY2DI(p) ((dictitem_T *)(p - offsetof(dictitem_T, di_key))) +# define HI2DI(hi) HIKEY2DI((hi)->hi_key) |