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