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