Mercurial > projects > ldc
diff test/assign.d @ 1:c53b6e3fe49a trunk
[svn r5] Initial commit. Most things are very rough.
author | lindquist |
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date | Sat, 01 Sep 2007 21:43:27 +0200 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/test/assign.d Sat Sep 01 21:43:27 2007 +0200 @@ -0,0 +1,23 @@ +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); +}