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annotate tests/mini/assign.d @ 341:1bb99290e03a trunk

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[svn r362] Started merging the old 'test' dir as well as the newer 'tangotests' dir into 'tests/mini' and 'tests/minicomplex'.
author lindquist
date Sun, 13 Jul 2008 02:51:19 +0200
parents test/assign.d@c53b6e3fe49a
children
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1 module assign;
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2
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3 // this is taken from std.intrinsic from gdc
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4
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5 int mybtc(uint *p, uint bitnum)
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6 {
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7 uint * q = p + (bitnum / (uint.sizeof*8));
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8 uint mask = 1 << (bitnum & ((uint.sizeof*8) - 1));
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9 int result = *q & mask;
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10 *q ^= mask;
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11 return result ? -1 : 0;
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12 }
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13
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14 void main()
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15 {
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16 uint i = 0xFFFF_FFFF;
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17 int r = mybtc(&i, 31);
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18 assert(r);
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19 assert(i == 0x7FFF_FFFF);
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20 r = mybtc(&i, 31);
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21 assert(!r);
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22 assert(i == 0xFFFF_FFFF);
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23 }