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Merge pull request #38 from wtsi-hgi/feature/small-float-serialization

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Feature/small float serialization
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Niels
2015-03-23 20:15:50 +01:00
parent bb2671df11 7bfcbe2825
commit a382a93a8e
2 changed files with 14 additions and 2 deletions
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10
src/json.hpp
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@ -1882,7 +1882,8 @@ class basic_json
recursively. Note that
- strings and object keys are escaped using escape_string()
- numbers are converted to a string before output using std::to_string()
- integer numbers are converted to a string before output using std::to_string()
- floating-point numbers are converted to a string using "%g" format
@param prettyPrint whether the output shall be pretty-printed
@param indentStep the indent level
@ -1990,7 +1991,12 @@ class basic_json
case (value_t::number_float):
{
return std::to_string(m_value.number_float);
// 15 digits of precision allows round-trip IEEE 754 string->double->string
unsigned int sz = (unsigned int)std::snprintf(nullptr, 0, "%.15g", m_value.number_float);
std::vector<char> buf(sz + 1);
std::snprintf(&buf[0], buf.size(), "%.15g", m_value.number_float);
string_t formatted = buf.data();
return formatted;
}
default: