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Test value casts which are Undefined Behavior

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Mark as TODO since UB is not consistent across all supported platforms.
This commit is contained in:
Michael Davidsaver
2023-11-10 12:45:47 -08:00
parent e05ee2b2ab
commit 1ca7600a2b
1 changed files with 32 additions and 1 deletions
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test/testdata.cpp
+32 -1
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@@ -4,6 +4,8 @@
* in file LICENSE that is included with this distribution.
*/
#include <limits>
#include <testMain.h>
#include <epicsUnitTest.h>
@@ -495,7 +497,7 @@ void testClear()
MAIN(testdata)
{
testPlan(156);
testPlan(172);
testSetup();
testTraverse();
testAssign();
@@ -544,6 +546,35 @@ MAIN(testdata)
testConvertScalar2<int32_t, uint64_t, int64_t>(-2147483648, 0x80000000, -2147483648);
testTodoEnd();
testConvertScalar2<int32_t, uint64_t, int64_t>(0, 0x100000000llu, -0);
testTodoBegin("UB");
// test non-finite -> integer casts
// copy in
testConvertScalar2<int64_t, double, int32_t>(0,
std::numeric_limits<double>::quiet_NaN(),
0);
testConvertScalar2<int64_t, double, int32_t>(0x7fffffffffffffff,
std::numeric_limits<double>::infinity(),
0x7fffffff);
testConvertScalar2<int64_t, double, int32_t>(0x8000000000000000,
-std::numeric_limits<double>::infinity(),
0x80000000);
testConvertScalar2<uint64_t, double, uint32_t>(0xffffffffffffffff,
std::numeric_limits<double>::infinity(),
0xffffffff);
// copy out
testConvertScalar2<double, double, int32_t>(std::numeric_limits<double>::quiet_NaN(),
std::numeric_limits<double>::quiet_NaN(),
0);
testConvertScalar2<double, double, int32_t>(std::numeric_limits<double>::infinity(),
std::numeric_limits<double>::infinity(),
0x7fffffff);
testConvertScalar2<double, double, int32_t>(-std::numeric_limits<double>::infinity(),
-std::numeric_limits<double>::infinity(),
0x80000000);
testConvertScalar2<double, double, uint32_t>(std::numeric_limits<double>::infinity(),
std::numeric_limits<double>::infinity(),
0xffffffff);
testTodoEnd();
testAssignSimilar();
testAssignSimilarNDArray();