59 lines
3.7 KiB
C++
59 lines
3.7 KiB
C++
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#include "catch.hpp"
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#include <mapnik/safe_cast.hpp>
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#define CAST_ASSERT(numeric_type) \
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using limit = std::numeric_limits<numeric_type>; \
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auto min_value = static_cast<std::intmax_t>(limit::min()) - 1; \
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auto max_value = static_cast<std::intmax_t>(limit::max()) + 1; \
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CHECK(limit::min() == mapnik::safe_cast<numeric_type>(min_value)); \
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CHECK(limit::max() == mapnik::safe_cast<numeric_type>(max_value));
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#define CAST_ASSERT2(numeric_type) \
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using limit = std::numeric_limits<numeric_type>; \
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auto min_value = static_cast<std::intmax_t>(limit::min()); \
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auto max_value = static_cast<std::intmax_t>(limit::max()); \
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CHECK(limit::min() == mapnik::safe_cast<numeric_type>(min_value)); \
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CHECK(limit::max() == mapnik::safe_cast<numeric_type>(max_value));
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#define CAST_ASSERT3(numeric_type) \
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using limit = std::numeric_limits<numeric_type>; \
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auto min_value = static_cast<std::intmax_t>(limit::min()) - 1; \
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auto max_value = static_cast<std::uintmax_t>(limit::max()); \
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CHECK(limit::min() == mapnik::safe_cast<numeric_type>(min_value)); \
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CHECK(limit::max() == mapnik::safe_cast<numeric_type>(max_value));
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#define CAST_ASSERT4(numeric_type) \
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using limit = std::numeric_limits<numeric_type>; \
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auto min_value = static_cast<double>(-limit::max()) - 1; \
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auto max_value = static_cast<double>(limit::max()); \
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CHECK(-limit::max() == mapnik::safe_cast<numeric_type>(min_value)); \
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CHECK(limit::max() == mapnik::safe_cast<numeric_type>(max_value));
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TEST_CASE("saturated cast")
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{
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SECTION("int8") { CAST_ASSERT(std::int8_t); }
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SECTION("int16") { CAST_ASSERT(std::int16_t); }
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SECTION("int32") { CAST_ASSERT(std::int32_t); }
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SECTION("int64") { CAST_ASSERT2(std::int64_t); }
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SECTION("intmax") { CAST_ASSERT2(std::intmax_t); }
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SECTION("intptr") { CAST_ASSERT2(std::intptr_t); }
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SECTION("uint8") { CAST_ASSERT(std::uint8_t); }
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SECTION("uint16") { CAST_ASSERT(std::uint16_t); }
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SECTION("uint32") { CAST_ASSERT(std::uint32_t); }
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SECTION("uint64") { CAST_ASSERT3(std::uint64_t); }
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SECTION("uintmax") { CAST_ASSERT3(std::uintmax_t); }
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SECTION("uintptr") { CAST_ASSERT3(std::uintptr_t); }
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SECTION("float") { CAST_ASSERT4(float); }
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SECTION("freeform")
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{
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CHECK(static_cast<std::size_t>(0) == mapnik::safe_cast<std::size_t>(-1));
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CHECK(static_cast<std::uint64_t>(0) == mapnik::safe_cast<std::uint64_t>(-1));
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CHECK(static_cast<unsigned long long>(0) == mapnik::safe_cast<unsigned long long>(-1));
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}
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}
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