diff options
Diffstat (limited to 'arr.c')
| -rw-r--r-- | arr.c | 27 |
1 files changed, 25 insertions, 2 deletions
@@ -104,8 +104,31 @@ static void arr_remove_last_(void **arr, size_t item_sz) { arr_hdr(*arr)->len--; (void)item_sz; } -#define arr_add(arr) arr_add_((void **)(arr), sizeof **(arr)) -#define arr_adda(arr, allocr) arr_adda_((void **)(arr), sizeof **(arr), allocr) +#ifdef __GNUC__ +#define typeof __typeof__ +#endif + +#if defined(__GNUC__) || defined(__TINYC__) +#define HAS_TYPEOF 1 +#endif + +#if HAS_TYPEOF +/* +this is to cast the return value of arr_add so that gcc produces a warning if you +do something like: +float *arr = NULL; +// ... +int *x = arr_add(&arr); +You shouldn't rely on this, though, e.g. by doing +*arr_add(&arr) = 17; + */ +#define arr_ptr_type(arr) __typeof__(*(arr)) +#else +#define arr_ptr_type(arr) void * +#endif + +#define arr_add(arr) (arr_ptr_type(arr))arr_add_((void **)(arr), sizeof **(arr)) +#define arr_adda(arr, allocr) (arr_ptr_type(arr))arr_adda_((void **)(arr), sizeof **(arr), allocr) #define arr_resv(arr, n) arr_resv_((void **)(arr), n, sizeof **(arr)) #define arr_resva(arr, n, allocr) arr_resva_((void **)(arr), n, sizeof **(arr), allocr) #define arr_set_len(arr, n) arr_set_len_((void **)(arr), n, sizeof **(arr)) |