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fixed GH #1128: Poco::NumberFormatter::format(float, precision) rounding changed

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This commit is contained in:
Guenter Obiltschnig
2016-02-28 13:32:54 +01:00
parent 539eba72d6
commit 8c607d3213
6 changed files with 178 additions and 24 deletions
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51
Foundation/include/Poco/NumericString.h
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@@ -35,6 +35,7 @@
#include <locale>
#endif
// binary numbers are supported, thus 64 (bits) + 1 (string terminating zero)
#define POCO_MAX_INT_STRING_LEN 65
// value from strtod.cc (double_conversion::kMaxSignificantDecimalDigits)
@@ -441,16 +442,25 @@ bool uIntToStr (T number, unsigned short base, std::string& result, bool prefix
// http://florian.loitsch.com/publications/dtoa-pldi2010.pdf
//
Foundation_API void floatToStr(char* buffer,
int bufferSize,
float value,
int lowDec = -std::numeric_limits<double>::digits10,
int highDec = std::numeric_limits<double>::digits10);
int lowDec = -std::numeric_limits<float>::digits10,
int highDec = std::numeric_limits<float>::digits10);
/// Converts a float value to string. Converted string must be shorter than bufferSize.
/// Conversion is done by computing the shortest string of digits that correctly represents
/// the input number. Depending on lowDec and highDec values, the function returns
/// decimal or exponential representation.
Foundation_API void floatToFixedStr(char* buffer,
int bufferSize,
float value,
int precision);
/// Converts a float value to string. Converted string must be shorter than bufferSize.
/// Computes a decimal representation with a fixed number of digits after the
/// decimal point.
Foundation_API std::string& floatToStr(std::string& str,
float value,
@@ -464,6 +474,17 @@ Foundation_API std::string& floatToStr(std::string& str,
/// and width (total length of formatted string).
Foundation_API std::string& floatToFixedStr(std::string& str,
float value,
int precision,
int width = 0,
char thSep = 0,
char decSep = 0);
/// Converts a float value, assigns it to the supplied string and returns the reference.
/// This function calls floatToFixedStr(char*, int, float, int) and formats the result according to
/// precision (total number of digits after the decimal point) and width (total length of formatted string).
Foundation_API void doubleToStr(char* buffer,
int bufferSize,
double value,
@@ -475,6 +496,15 @@ Foundation_API void doubleToStr(char* buffer,
/// decimal or exponential representation.
Foundation_API void doubleToFixedStr(char* buffer,
int bufferSize,
double value,
int precision);
/// Converts a double value to string. Converted string must be shorter than bufferSize.
/// Computes a decimal representation with a fixed number of digits after the
/// decimal point.
Foundation_API std::string& doubleToStr(std::string& str,
double value,
int precision = -1,
@@ -482,11 +512,22 @@ Foundation_API std::string& doubleToStr(std::string& str,
char thSep = 0,
char decSep = 0);
/// Converts a double value, assigns it to the supplied string and returns the reference.
/// This function calls doubleToStr(char*, int, float, int, int) and formats the result according to
/// This function calls doubleToStr(char*, int, double, int, int) and formats the result according to
/// precision (total number of digits after the decimal point, -1 means ignore precision argument)
/// and width (total length of formatted string).
Foundation_API std::string& doubleToFixedStr(std::string& str,
double value,
int precision = -1,
int width = 0,
char thSep = 0,
char decSep = 0);
/// Converts a double value, assigns it to the supplied string and returns the reference.
/// This function calls doubleToFixedStr(char*, int, double, int) and formats the result according to
/// precision (total number of digits after the decimal point) and width (total length of formatted string).
Foundation_API float strToFloat(const char* str);
/// Converts the string of characters into single-precision floating point number.
/// Function uses double_convesrion::DoubleToStringConverter to do the conversion.
@@ -513,10 +554,6 @@ Foundation_API bool strToDouble(const std::string& str, double& result, char dec
///
/// Returns true if succesful, false otherwise.
//
// end double-conversion functions declarations
//
} // namespace Poco