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znot.c - libzahl - big integer library |
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git clone git://git.suckless.org/libzahl |
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znot.c (419B) |
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1 /* See LICENSE file for copyright and license details. */ |
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2 #include "internals.h" |
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3 |
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4 |
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5 void |
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6 znot(z_t a, z_t b) |
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7 { |
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8 size_t bits; |
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9 |
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10 if (unlikely(zzero(b))) { |
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11 SET_SIGNUM(a, 0); |
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12 return; |
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13 } |
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14 |
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15 bits = zbits(b); |
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16 a->used = b->used; |
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17 SET_SIGNUM(a, -zsignum(b)); |
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18 |
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19 ZMEM_1OP(a->chars, b->chars, a->used, ~); |
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20 bits = BITS_IN_LAST_CHAR(bits); |
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21 if (bits) |
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22 a->chars[a->used - 1] &= ((zahl_char_t)1 << bits) - 1; |
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23 |
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24 TRIM_AND_ZERO(a); |
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25 } |
