qintc.cc
1.96 KB
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#include <qpdf/QIntC.hh>
#include <stdint.h>
#include <cassert>
#define try_convert(exp_pass, fn, i) \
try_convert_real(#fn "(" #i ")", exp_pass, fn, i)
template <typename From, typename To>
static void try_convert_real(
char const* description, bool exp_pass,
To (*fn)(From const&), From const& i)
{
bool passed = false;
try
{
To result = fn(i);
passed = true;
std::cout << description << ": " << i << " " << result;
}
catch (std::range_error& e)
{
std::cout << description << ": " << e.what();
passed = false;
}
std::cout << ((passed == exp_pass) ? " PASSED" : " FAILED") << std::endl;
}
int main()
{
uint32_t u1 = 3141592653U; // Too big for signed type
int32_t i1 = -1153374643; // Same bit pattern as u1
uint64_t ul1 = 1099511627776LL; // Too big for 32-bit
uint64_t ul2 = 12345; // Fits into 32-bit
int32_t i2 = 81; // Fits in char and uchar
char c1 = '\xf7'; // Signed vaule when char
// Verify i1 and u1 have same bit pattern
assert(static_cast<uint32_t>(i1) == u1);
// Verify that we can unsafely convert between char and unsigned char
assert(c1 == static_cast<char>(static_cast<unsigned char>(c1)));
try_convert(true, QIntC::to_int<int32_t>, i1);
try_convert(true, QIntC::to_uint<uint32_t>, u1);
try_convert(false, QIntC::to_int<uint32_t>, u1);
try_convert(false, QIntC::to_uint<int32_t>, i1);
try_convert(false, QIntC::to_int<uint64_t>, ul1);
try_convert(true, QIntC::to_int<uint64_t>, ul2);
try_convert(true, QIntC::to_uint<uint64_t>, ul2);
try_convert(true, QIntC::to_offset<uint32_t>, u1);
try_convert(true, QIntC::to_offset<int32_t>, i1);
try_convert(false, QIntC::to_ulonglong<int32_t>, i1);
try_convert(true, QIntC::to_char<int32_t>, i2);
try_convert(true, QIntC::to_uchar<int32_t>, i2);
try_convert(false, QIntC::to_uchar<char>, c1);
return 0;
}