qdecimal_p.h File Reference

#include "qschemanumeric_p.h"

Go to the source code of this file.

Classes
class	QPatternist::Decimal
	Implements the value instance of the xs:decimal type. More...

Namespaces
	QPatternist
	The namespace for the internal API of QtXmlPatterns.

Functions
Q_CORE_EXPORT char *	qdtoa (double d, int mode, int ndigits, int *decpt, int *sign, char **rve, char **resultp)

Function Documentation

qdtoa()

Q_CORE_EXPORT char* qdtoa	(	double	d,
		int	mode,
		int	ndigits,
		int *	decpt,
		int *	sign,
		char **	rve,
		char **	resultp
	)

Defined in QtCore's qlocale.cpp.

Definition at line 2271 of file qlocale_tools.cpp.

Referenced by _qdtoa(), QLocalePrivate::doubleToString(), QPatternist::AbstractFloat< isDouble >::stringValue(), and QPatternist::Decimal::toString().

{
    // Some values of the floating-point control word can cause _qdtoa to crash with an underflow.
    // We set a safe value here.
#ifdef Q_OS_WIN
    _clear87();
    unsigned int oldbits = _control87(0, 0);
#ifndef MCW_EM
#    ifdef _MCW_EM
#        define MCW_EM _MCW_EM
#    else
#        define MCW_EM 0x0008001F
#    endif
#endif
    _control87(MCW_EM, MCW_EM);
#endif

#if defined(Q_OS_LINUX) && !defined(__UCLIBC__)
    fenv_t envp;
    feholdexcept(&envp);
#endif

    char *s = _qdtoa(d, mode, ndigits, decpt, sign, rve, resultp);

#ifdef Q_OS_WIN
    _clear87();
#ifndef _M_X64
    _control87(oldbits, 0xFFFFF);
#else
    _control87(oldbits, _MCW_EM|_MCW_DN|_MCW_RC);
#endif //_M_X64
#endif //Q_OS_WIN

#if defined(Q_OS_LINUX) && !defined(__UCLIBC__)
    fesetenv(&envp);
#endif

    return s;
}