diff options
| author | Darryl L. Miles <darryl.miles@darrylmiles.org> | 2013-02-10 09:02:00 +0000 |
|---|---|---|
| committer | The Qt Project <gerrit-noreply@qt-project.org> | 2013-04-12 22:33:19 +0200 |
| commit | 6348de873724fc613446c46b5accfabab7afaaea (patch) | |
| tree | 00501a4ce17df716b7d4ef583ad68f5b76e8bfae /src/corelib/json | |
| parent | e2d614b6a9e88c90331e3de9bb339a2ed609ea95 (diff) | |
Json writer, emit full precision for floating point Number types
Previously Qt JSON writer would only emit 6 digits of precision as this
is the default with the formatter.
However with testing against NodeJS JSON.stringify() this behavior is
inconsistent with the defacto standard JSON implementation and conveys
a loss of precision.
Change-Id: Ie1845a6e0ee0b4c05f63ec0062f372e891855f0b
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Diffstat (limited to 'src/corelib/json')
| -rw-r--r-- | src/corelib/json/qjson_p.h | 1 | ||||
| -rw-r--r-- | src/corelib/json/qjsonwriter.cpp | 4 |
2 files changed, 3 insertions, 2 deletions
diff --git a/src/corelib/json/qjson_p.h b/src/corelib/json/qjson_p.h index 8d6735273c..96a11cd40e 100644 --- a/src/corelib/json/qjson_p.h +++ b/src/corelib/json/qjson_p.h @@ -63,6 +63,7 @@ #include <qnumeric.h> #include <limits.h> +#include <limits> QT_BEGIN_NAMESPACE diff --git a/src/corelib/json/qjsonwriter.cpp b/src/corelib/json/qjsonwriter.cpp index c284f76cbb..8426b351f6 100644 --- a/src/corelib/json/qjsonwriter.cpp +++ b/src/corelib/json/qjsonwriter.cpp @@ -171,8 +171,8 @@ static void valueToJson(const QJsonPrivate::Base *b, const QJsonPrivate::Value & break; case QJsonValue::Double: { const double d = v.toDouble(b); - if (qIsFinite(d)) - json += QByteArray::number(d); + if (qIsFinite(d)) // +2 to format to ensure the expected precision + json += QByteArray::number(d, 'g', std::numeric_limits<double>::digits10 + 2); // ::digits10 is 15 else json += "null"; // +INF || -INF || NaN (see RFC4627#section2.4) break; |