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	zbset.c - libzahl - big integer library
	git clone git://git.suckless.org/libzahl
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	---
	zbset.c (815B)
	---
	1 /* See LICENSE file for copyright and license details. */
	2 #include "internals.h"
	3
	4
	5 #define PROLOGUE(MAY_INCREASE)\
	6 zahl_char_t mask = 1;\
	7 size_t chars = FLOOR_BITS_TO_CHARS(bit);\
	8 if (MAY_INCREASE) {\
	9 if (zzero(a)) {\
	10 a->used = 0;\
	11 SET_SIGNUM(a, 1);\
	12 }\
	13 if (unlikely(chars >= a->used)) {\
	14 ENSURE_SIZE(a, chars + 1);\
	15 zmemset(a->chars + a->used, 0, chars + 1 - a->us…
	16 a->used = chars + 1;\
	17 }\
	18 } else if (unlikely(chars >= a->used)) {\
	19 return;\
	20 }\
	21 bit = BITS_IN_LAST_CHAR(bit);\
	22 mask <<= bit
	23
	24
	25 void
	26 zbset_ll_set(z_t a, size_t bit)
	27 {
	28 PROLOGUE(1);
	29 a->chars[chars] \|= mask;
	30 }
	31
	32 void
	33 zbset_ll_clear(z_t a, size_t bit)
	34 {
	35 PROLOGUE(0);
	36 a->chars[chars] &= ~mask;
	37 TRIM_AND_ZERO(a);
	38 }
	39
	40 void
	41 zbset_ll_flip(z_t a, size_t bit)
	42 {
	43 PROLOGUE(1);
	44 a->chars[chars] ^= mask;
	45 TRIM_AND_ZERO(a);
	46 }