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Optimize ParseNumber()

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miloyip
2014-09-05 19:51:20 +08:00
parent 881c91d696
commit a71f2e60ff
3 changed files with 98 additions and 74 deletions
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118
test/unittest/readertest.cpp
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@@ -184,7 +184,7 @@ static void TestParseDouble() {
StringStream s(str); \
ParseDoubleHandler h; \
Reader reader; \
reader.Parse<fullPrecision ? kParseFullPrecisionFlag : 0>(s, h); \
ASSERT_EQ(kParseErrorNone, reader.Parse<fullPrecision ? kParseFullPrecisionFlag : 0>(s, h).Code()); \
EXPECT_EQ(1u, h.step_); \
if (fullPrecision) { \
EXPECT_EQ(x, h.actual_); \
@@ -195,67 +195,65 @@ static void TestParseDouble() {
EXPECT_DOUBLE_EQ(x, h.actual_); \
}
TEST_DOUBLE(fullPrecision, "0.0", 0.0);
TEST_DOUBLE(fullPrecision, "1.0", 1.0);
TEST_DOUBLE(fullPrecision, "-1.0", -1.0);
TEST_DOUBLE(fullPrecision, "1.5", 1.5);
TEST_DOUBLE(fullPrecision, "-1.5", -1.5);
TEST_DOUBLE(fullPrecision, "3.1416", 3.1416);
TEST_DOUBLE(fullPrecision, "1E10", 1E10);
TEST_DOUBLE(fullPrecision, "1e10", 1e10);
TEST_DOUBLE(fullPrecision, "1E+10", 1E+10);
TEST_DOUBLE(fullPrecision, "1E-10", 1E-10);
TEST_DOUBLE(fullPrecision, "-1E10", -1E10);
TEST_DOUBLE(fullPrecision, "-1e10", -1e10);
TEST_DOUBLE(fullPrecision, "-1E+10", -1E+10);
TEST_DOUBLE(fullPrecision, "-1E-10", -1E-10);
TEST_DOUBLE(fullPrecision, "1.234E+10", 1.234E+10);
TEST_DOUBLE(fullPrecision, "1.234E-10", 1.234E-10);
TEST_DOUBLE(fullPrecision, "1.79769e+308", 1.79769e+308);
TEST_DOUBLE(fullPrecision, "2.22507e-308", 2.22507e-308);
TEST_DOUBLE(fullPrecision, "-1.79769e+308", -1.79769e+308);
TEST_DOUBLE(fullPrecision, "-2.22507e-308", -2.22507e-308);
TEST_DOUBLE(fullPrecision, "4.9406564584124654e-324", 4.9406564584124654e-324); // minimum denormal
TEST_DOUBLE(fullPrecision, "1e-10000", 0.0); // must underflow
TEST_DOUBLE(fullPrecision, "18446744073709551616", 18446744073709551616.0); // 2^64 (max of uint64_t + 1, force to use double)
TEST_DOUBLE(fullPrecision, "-9223372036854775809", -9223372036854775809.0); // -2^63 - 1(min of int64_t + 1, force to use double)
TEST_DOUBLE(fullPrecision, "0.9868011474609375", 0.9868011474609375); // https://github.com/miloyip/rapidjson/issues/120
TEST_DOUBLE(fullPrecision, "123e34", 123e34); // Fast Path Cases In Disguise
TEST_DOUBLE(fullPrecision, "0.0", 0.0);
TEST_DOUBLE(fullPrecision, "1.0", 1.0);
TEST_DOUBLE(fullPrecision, "-1.0", -1.0);
TEST_DOUBLE(fullPrecision, "1.5", 1.5);
TEST_DOUBLE(fullPrecision, "-1.5", -1.5);
TEST_DOUBLE(fullPrecision, "3.1416", 3.1416);
TEST_DOUBLE(fullPrecision, "1E10", 1E10);
TEST_DOUBLE(fullPrecision, "1e10", 1e10);
TEST_DOUBLE(fullPrecision, "1E+10", 1E+10);
TEST_DOUBLE(fullPrecision, "1E-10", 1E-10);
TEST_DOUBLE(fullPrecision, "-1E10", -1E10);
TEST_DOUBLE(fullPrecision, "-1e10", -1e10);
TEST_DOUBLE(fullPrecision, "-1E+10", -1E+10);
TEST_DOUBLE(fullPrecision, "-1E-10", -1E-10);
TEST_DOUBLE(fullPrecision, "1.234E+10", 1.234E+10);
TEST_DOUBLE(fullPrecision, "1.234E-10", 1.234E-10);
TEST_DOUBLE(fullPrecision, "1.79769e+308", 1.79769e+308);
TEST_DOUBLE(fullPrecision, "2.22507e-308", 2.22507e-308);
TEST_DOUBLE(fullPrecision, "-1.79769e+308", -1.79769e+308);
TEST_DOUBLE(fullPrecision, "-2.22507e-308", -2.22507e-308);
TEST_DOUBLE(fullPrecision, "4.9406564584124654e-324", 4.9406564584124654e-324); // minimum denormal
TEST_DOUBLE(fullPrecision, "1e-10000", 0.0); // must underflow
TEST_DOUBLE(fullPrecision, "18446744073709551616", 18446744073709551616.0); // 2^64 (max of uint64_t + 1, force to use double)
TEST_DOUBLE(fullPrecision, "-9223372036854775809", -9223372036854775809.0); // -2^63 - 1(min of int64_t + 1, force to use double)
TEST_DOUBLE(fullPrecision, "0.9868011474609375", 0.9868011474609375); // https://github.com/miloyip/rapidjson/issues/120
TEST_DOUBLE(fullPrecision, "123e34", 123e34); // Fast Path Cases In Disguise
TEST_DOUBLE(fullPrecision, "45913141877270640000.0", 45913141877270640000.0);
{
char n1e308[310]; // '1' followed by 308 '0'
n1e308[0] = '1';
for (int i = 1; i < 309; i++)
n1e308[i] = '0';
n1e308[309] = '\0';
TEST_DOUBLE(fullPrecision, n1e308, 1E308);
}
// Random test for double
{
union {
double d;
uint64_t u;
}u;
Random r;
for (unsigned i = 0; i < 100000; i++) {
do {
// Need to call r() in two statements for cross-platform coherent sequence.
u.u = uint64_t(r()) << 32;
u.u |= uint64_t(r());
} while (std::isnan(u.d) || std::isinf(u.d)
#ifdef _MSC_VER
// VC's strtod() has problem with denormal numbers
|| !std::isnormal(u.d)
#endif
);
char buffer[32];
*internal::dtoa(u.d, buffer) = '\0';
TEST_DOUBLE(fullPrecision, buffer, u.d);
{
char n1e308[310]; // '1' followed by 308 '0'
n1e308[0] = '1';
for (int i = 1; i < 309; i++)
n1e308[i] = '0';
n1e308[309] = '\0';
TEST_DOUBLE(fullPrecision, n1e308, 1E308);
}
}
#if 1
// Random test for double
{
union {
double d;
uint64_t u;
}u;
Random r;
for (unsigned i = 0; i < 100000; i++) {
do {
// Need to call r() in two statements for cross-platform coherent sequence.
u.u = uint64_t(r()) << 32;
u.u |= uint64_t(r());
} while (std::isnan(u.d) || std::isinf(u.d) || !std::isnormal(u.d));
char buffer[32];
*internal::dtoa(u.d, buffer) = '\0';
TEST_DOUBLE(fullPrecision, buffer, u.d);
}
}
#endif
#undef TEST_DOUBLE
}