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view tests/mini/assign.d @ 866:cd87b3f15ccf
Automated merge with http://hg.dsource.org/projects/ldc
author | Christian Kamm <kamm incasoftware de> |
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date | Sat, 20 Dec 2008 09:15:46 +0100 |
parents | 1bb99290e03a |
children |
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module assign; // this is taken from std.intrinsic from gdc int mybtc(uint *p, uint bitnum) { uint * q = p + (bitnum / (uint.sizeof*8)); uint mask = 1 << (bitnum & ((uint.sizeof*8) - 1)); int result = *q & mask; *q ^= mask; return result ? -1 : 0; } void main() { uint i = 0xFFFF_FFFF; int r = mybtc(&i, 31); assert(r); assert(i == 0x7FFF_FFFF); r = mybtc(&i, 31); assert(!r); assert(i == 0xFFFF_FFFF); }