Add tests for fast_atof

The custom implementation for fast_atof currently lacks test coverage,
making it susceptiple to regressions with future changes. Add some
basic test coverage, in addition to a few documented cases that are
known to fail.

test/CMakeLists.txt

@@ -16,6 +16,7 @@ SOURCE_GROUP( unit FILES
 )
 
 SET( TEST_SRCS
+	unit/utFastAtof.cpp
 	unit/utFindDegenerates.cpp
 	unit/utFindInvalidData.cpp
 	unit/utFixInfacingNormals.cpp

test/unit/utFastAtof.cpp

@@ -0,0 +1,144 @@
+#include "UnitTestPCH.h"
+
+#include <fast_atof.h>
+
+
+class FastAtofTest : public ::testing::Test
+{
+protected:
+	template <typename Real, typename AtofFunc>
+	static void RunTest(AtofFunc atof_func)
+	{
+		const Real kEps = 1e-5;
+
+#define TEST_CASE(NUM) EXPECT_NEAR(static_cast<Real>(NUM), atof_func(#NUM), kEps)
+#define TEST_CASE_NAN(NUM) EXPECT_TRUE(std::isnan(atof_func(#NUM)))
+#define TEST_CASE_INF(NUM) EXPECT_TRUE(std::isinf(atof_func(#NUM)))
+
+		TEST_CASE(0);
+		TEST_CASE(1.354);
+		TEST_CASE(1054E-3);
+		TEST_CASE(-1054E-3);
+		TEST_CASE(-10.54E30);
+		TEST_CASE(-345554.54e-5);
+		TEST_CASE(-34555.534954e-5);
+		TEST_CASE(-34555.534954e-5);
+		TEST_CASE(549067);
+		TEST_CASE(567);
+		TEST_CASE(446);
+		TEST_CASE(7);
+		TEST_CASE(73);
+		TEST_CASE(256);
+		TEST_CASE(5676);
+		TEST_CASE(3);
+		TEST_CASE(738);
+		TEST_CASE(684);
+		TEST_CASE(26);
+		TEST_CASE(673.678e-56);
+		TEST_CASE(53);
+		TEST_CASE(67);
+		TEST_CASE(684);
+		TEST_CASE(-5437E24);
+		TEST_CASE(8);
+		TEST_CASE(84);
+		TEST_CASE(3);
+		TEST_CASE(56733.68);
+		TEST_CASE(786);
+		TEST_CASE(6478);
+		TEST_CASE(34563.65683598734);
+		TEST_CASE(5673);
+		TEST_CASE(784e-3);
+		TEST_CASE(8678);
+		TEST_CASE(46784);
+		TEST_CASE(-54.0888e-6);
+		TEST_CASE(100000e10);
+		TEST_CASE(1e-307);
+		TEST_CASE(0.000001e-301);
+		TEST_CASE(0.0000001e-300);
+		TEST_CASE(0.00000001e-299);
+		TEST_CASE(1000000e-313);
+		TEST_CASE(10000000e-314);
+		TEST_CASE(100000000e-315);
+		TEST_CASE(12.345);
+		TEST_CASE(12.345e19);
+		TEST_CASE(-.1e+9);
+		TEST_CASE(.125);
+		TEST_CASE(1e20);
+		TEST_CASE(0e-19);
+		TEST_CASE(400012);
+		TEST_CASE(5.9e-76);
+		TEST_CASE_INF(inf);
+		TEST_CASE_INF(inf);
+		TEST_CASE_INF(infinity);
+		TEST_CASE_INF(Inf);
+		TEST_CASE_INF(-Inf);
+		TEST_CASE_INF(+InFiNiTy);
+		TEST_CASE_NAN(NAN);
+		TEST_CASE_NAN(NaN);
+		TEST_CASE_NAN(nan);
+		EXPECT_EQ(static_cast<Real>(6), atof_func("006"));
+		EXPECT_EQ(static_cast<Real>(5.3), atof_func("5.300  "));
+
+		/* Failing Cases:
+		EXPECT_EQ(static_cast<Real>(6), atof_func("  006"));
+		EXPECT_EQ(static_cast<Real>(5.3), atof_func("  5.300  "));
+		TEST_CASE(-10.54E45);
+		TEST_CASE(0x0A);
+		TEST_CASE(0xA0);
+		TEST_CASE(0x1p1023);
+		TEST_CASE(0x1000p1011);
+		TEST_CASE(0x1p1020);
+		TEST_CASE(0x0.00001p1040);
+		TEST_CASE(0x1p-1021);
+		TEST_CASE(0x1000p-1033);
+		TEST_CASE(0x10000p-1037);
+		TEST_CASE(0x0.001p-1009);
+		TEST_CASE(0x0.0001p-1005);
+		TEST_CASE(0x1.4p+3);
+		TEST_CASE(0xAp0);
+		TEST_CASE(0x0Ap0);
+		TEST_CASE(0x0.A0p8);
+		TEST_CASE(0x0.50p9);
+		TEST_CASE(0x0.28p10);
+		TEST_CASE(0x0.14p11);
+		TEST_CASE(0x0.0A0p12);
+		TEST_CASE(0x0.050p13);
+		TEST_CASE(0x0.028p14);
+		TEST_CASE(0x0.014p15);
+		TEST_CASE(0x00.00A0p16);
+		TEST_CASE(0x00.0050p17);
+		TEST_CASE(0x00.0028p18);
+		TEST_CASE(0x00.0014p19);
+		TEST_CASE(0x1p-1023);
+		TEST_CASE(0x0.8p-1022);
+		TEST_CASE(0x80000Ap-23);
+		TEST_CASE(0x100000000000008p0);
+		TEST_CASE(0x100000000000008.p0);
+		TEST_CASE(0x100000000000008.00p0);
+		TEST_CASE(0x10000000000000800p0);
+		TEST_CASE(0x10000000000000801p0)
+		*/
+
+#undef TEST_CASE
+#undef TEST_CASE_NAN
+#undef TEST_CASE_INF
+	}
+};
+
+struct FastAtofWrapper {
+	float operator()(const char* str) { return Assimp::fast_atof(str); }
+};
+
+struct FastAtodWrapper {
+	double operator()(const char* str) { return Assimp::fast_atod(str); }
+};
+
+TEST_F(FastAtofTest, FastAtof)
+{
+	RunTest<float>(FastAtofWrapper());
+}
+
+TEST_F(FastAtofTest, FastAtod)
+{
+	RunTest<double>(FastAtodWrapper());
+}