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fix double->string->double round-trip (bump minor ver.)

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See #98.
  http://stackoverflow.com/questions/747470/what-is-the-meaning-of-numeric-limitsdoubledigits10/16941784#16941784
This commit is contained in:
Christopher Dunn 2015-01-06 12:40:36 -06:00
parent dfc5f879c1
commit 65cee6ea16
2 changed files with 7 additions and 7 deletions
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6
src/lib_json/json_writer.cpp
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@ -87,13 +87,13 @@ std::string valueToString(double value) {
// visual studio 2005 to
// avoid warning.
#if defined(WINCE)
len = _snprintf(buffer, sizeof(buffer), "%.16g", value);
len = _snprintf(buffer, sizeof(buffer), "%.17g", value);
#else
len = sprintf_s(buffer, sizeof(buffer), "%.16g", value);
len = sprintf_s(buffer, sizeof(buffer), "%.17g", value);
#endif
#else
if (isfinite(value)) {
len = snprintf(buffer, sizeof(buffer), "%.16g", value);
len = snprintf(buffer, sizeof(buffer), "%.17g", value);
} else {
// IEEE standard states that NaN values will not compare to themselves
if (value != value) {

8
src/test_lib_json/main.cpp
View File

@ -926,7 +926,7 @@ JSONTEST_FIXTURE(ValueTest, integers) {
JSONTEST_ASSERT_EQUAL(float(uint64ToDouble(Json::UInt64(1) << 63)),
val.asFloat());
JSONTEST_ASSERT_EQUAL(true, val.asBool());
JSONTEST_ASSERT_STRING_EQUAL("9.223372036854776e+18",
JSONTEST_ASSERT_STRING_EQUAL("9.2233720368547758e+18",
normalizeFloatingPointStr(val.asString()));
// int64 min
@ -974,7 +974,7 @@ JSONTEST_FIXTURE(ValueTest, integers) {
JSONTEST_ASSERT_EQUAL(-9223372036854775808.0, val.asDouble());
JSONTEST_ASSERT_EQUAL(-9223372036854775808.0, val.asFloat());
JSONTEST_ASSERT_EQUAL(true, val.asBool());
JSONTEST_ASSERT_STRING_EQUAL("-9.223372036854776e+18",
JSONTEST_ASSERT_STRING_EQUAL("-9.2233720368547758e+18",
normalizeFloatingPointStr(val.asString()));
// 10^19
@ -1065,7 +1065,7 @@ JSONTEST_FIXTURE(ValueTest, integers) {
JSONTEST_ASSERT_EQUAL(18446744073709551616.0, val.asDouble());
JSONTEST_ASSERT_EQUAL(18446744073709551616.0, val.asFloat());
JSONTEST_ASSERT_EQUAL(true, val.asBool());
JSONTEST_ASSERT_STRING_EQUAL("1.844674407370955e+19",
JSONTEST_ASSERT_STRING_EQUAL("1.8446744073709552e+19",
normalizeFloatingPointStr(val.asString()));
#endif
}
@ -1217,7 +1217,7 @@ JSONTEST_FIXTURE(ValueTest, nonIntegers) {
normalizeFloatingPointStr(val.asString()));
val = Json::Value(1.2345678901234);
JSONTEST_ASSERT_STRING_EQUAL("1.2345678901234",
JSONTEST_ASSERT_STRING_EQUAL("1.2345678901234001",
normalizeFloatingPointStr(val.asString()));
// A 16-digit floating point number.