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[set] Add a macro to initialize with a static array

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Nicer than trying to hack one one every time (and it looks like my
previous attempt was wrong anyway)
This commit is contained in:
Bill Currie 2022-06-04 12:06:34 +09:00
parent cbc5654b5e
commit 76c62b49e0
1 changed files with 9 additions and 0 deletions
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9
include/QF/set.h
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@ -52,6 +52,7 @@ typedef uint32_t set_bits_t;
#define SET_BITS (sizeof (set_bits_t) * 8) #define SET_BITS (sizeof (set_bits_t) * 8)
//NOTE: x is the element number, so size is x + 1 //NOTE: x is the element number, so size is x + 1
#define SET_SIZE(x) (((x) + SET_BITS) & ~(SET_BITS - 1)) #define SET_SIZE(x) (((x) + SET_BITS) & ~(SET_BITS - 1))
#define SET_WORDS_STATIC(x) (SET_SIZE (x) / SET_BITS)
#define SET_WORDS(s) ((s)->size / SET_BITS) #define SET_WORDS(s) ((s)->size / SET_BITS)
#define SET_ZERO ((set_bits_t) 0) #define SET_ZERO ((set_bits_t) 0)
#define SET_ONE ((set_bits_t) 1) #define SET_ONE ((set_bits_t) 1)
@ -65,6 +66,14 @@ typedef uint32_t set_bits_t;
.size = SET_SIZE (x), \ .size = SET_SIZE (x), \
.map = alloc (SET_SIZE (x) / 8), \ .map = alloc (SET_SIZE (x) / 8), \
} }
#define SET_STATIC_ARRAY(array) { \
.size = 8 * __builtin_choose_expr ( \
sizeof (array[0]) == sizeof (set_bits_t), \
sizeof (array), \
(void) 0 \
), \
.map = array, \
}
/** Represent a set using a bitmap. /** Represent a set using a bitmap.