/*
* © Portions copyright (c) 2006-2007 Nokia Corporation. All rights reserved.
*
* Copyright (c) 1999
* Silicon Graphics Computer Systems, Inc.
*
* Copyright (c) 1999
* Boris Fomitchev
*
* This material is provided "as is", with absolutely no warranty expressed
* or implied. Any use is at your own risk.
*
* Permission to use or copy this software for any purpose is hereby granted
* without fee, provided the above notices are retained on all copies.
* Permission to modify the code and to distribute modified code is granted,
* provided the above notices are retained, and a notice that the code was
* modified is included with the above copyright notice.
*
*/
# include "stlport_prefix.h"
# ifdef __DECCXX
#define NDIG 400
# else
#define NDIG 82
# endif
# ifdef _STLP_NO_LONG_DOUBLE
# define MAXECVT 17
# define MAXFCVT 18
typedef double max_double_type;
# else
# define MAXECVT 35
# define MAXFCVT 36
typedef long double max_double_type;
# endif
#define MAXFSIG MAXECVT
#define MAXESIZ 5
#define todigit(x) ((x)+'0')
# include <stl/_config.h>
# ifdef _STLP_UNIX
# if defined (__sun)
# include <floatingpoint.h>
# endif
//# if !(defined(_STLP_USE_GLIBC) || defined(__FreeBSD__) || defined(__NetBSD__) || defined (_AIX) || defined(__MVS__) || defined (__OS400__) || defined (__QNXNTO__) || defined (__APPLE__) || defined (__DJGPP))
# if defined (__sun) || defined (__digital__) || defined (__sgi) || defined (_STLP_SCO_OPENSERVER) || defined (__NCR_SVR)
// DEC, SGI & Solaris need this
# include <values.h>
# include <nan.h>
# endif
# if defined (__QNXNTO__) || ( defined(__GNUC__) && defined(__APPLE__) )
# define USE_SPRINTF_INSTEAD
# endif
# if defined( _AIX ) // JFA 3-Aug-2000
# include <math.h>
# include <float.h>
# endif
# endif
# include <cstdlib>
//#if defined(_CRAY)
//# include <stdlib.h>
//#endif
#if defined (_MSC_VER) || defined (__MINGW32__) || defined (__BORLANDC__) || defined (__DJGPP) || defined (_STLP_SCO_OPENSERVER) || defined (__NCR_SVR)
# include <float.h>
#endif
#if defined(__MRC__) || defined(__SC__) || defined(_CRAY) //*TY 02/24/2000 - added support for MPW
# include <fp.h>
#endif
#include <cmath>
#if defined( __MSL__ )
# include <cstdlib> // for atoi
# include <cstdio> // for snprintf
# include <algorithm>
# include <cassert>
#endif
#if defined (__ISCPP__)
# include <cfloat>
#endif
# include "num_put.h"
# include <algorithm>
#if defined(__hpux) && !defined(_INCLUDE_HPUX_SOURCE)
extern "C" double erf(double);
extern "C" double erfc(double);
extern "C" double gamma(double); /* obsolescent */
extern "C" double hypot(double, double);
extern "C" int isnan(double);
extern "C" double j0(double);
extern "C" double j1(double);
extern "C" double jn(int, double);
extern "C" double lgamma(double);
extern "C" double y0(double);
extern "C" double y1(double);
extern "C" double yn(int, double);
# define HUGE_VALF _SINFINITY
# define INFINITY _SINFINITY
# define NAN _SQNAN
# define isnan(x) _ISNAN(x)
# define isinf(x) _ISINF(x)
# define signbit(x) _SIGNBIT(x)
# define isfinite(x) _ISFINITE(x)
# define isnormal(x) _ISNORMAL(x)
# define fpclassify(x) _FPCLASSIFY(x)
# define isunordered(x,y) _ISUNORDERED(x,y)
# define isgreater(x,y) _ISGREATER(x,y)
# define isgreaterequal(x,y) _ISGREATEREQUAL(x,y)
# define isless(x,y) _ISLESS(x,y)
# define islessequal(x,y) _ISLESSEQUAL(x,y)
# define islessgreater(x,y) _ISLESSGREATER(x,y)
# define FP_NORMAL 0
# define FP_ZERO 1
# define FP_INFINITE 2
# define FP_SUBNORMAL 3
# define FP_NAN 4
# define DECIMAL_DIG 17
# define _IS64(x) (sizeof(x)==sizeof(double))
# define _IS32(x) (sizeof(x)==sizeof(float))
extern "C" {
extern double copysign(double, double);
extern const float _SINFINITY;
extern const float _SQNAN;
# ifdef _PA_RISC
# define _ISNAN(x) (_IS32(x)?_Isnanf(x):(isnan)(x))
# define _ISINF(x) (_IS32(x)?_Isinff(x):_Isinf(x))
# define _SIGNBIT(x) (_IS32(x)?_Signbitf(x):_Signbit(x))
# define _ISFINITE(x) (_IS32(x)?_Isfinitef(x):_Isfinite(x))
# define _ISNORMAL(x) (_IS32(x)?_Isnormalf(x):_Isnormal(x))
# define _FPCLASSIFY(x) (_IS32(x)?_Fpclassifyf(x)>>1:_Fpclassify(x)>>1)
# define _ISUNORDERED(x,y) (_IS32(x)&&_IS32(y)?_Isunorderedf(x,y):_Isunordered(x,y))
extern int _Signbit(double);
extern int _Signbitf(float);
extern int _Isnanf(float);
extern int _Isfinite(double);
extern int _Isfinitef(float);
extern int _Isinf(double);
extern int _Isinff(float);
extern int _Isnormal(double);
extern int _Isnormalf(float);
extern int _Isunordered(double, double);
extern int _Isunorderedf(float, float);
extern int _Fpclassify(double);
extern int _Fpclassifyf(float);
# else
# include "math_ia64_internal.h"
# define _FPCLASSIFY(x) (_IS32(x)?_Fpclassf(x):_Fpclass(x))
extern int _Fpclass(double);
extern int _Fpclassf(float);
# endif
}
#ifndef _INCLUDE_XOPEN_SOURCE_EXTENDED
extern "C" char *fcvt(double, int, int *, int *);
extern "C" char *ecvt(double, int, int *, int *);
#endif
#ifndef _INCLUDE_HPUX_SOURCE
# ifndef _LONG_DOUBLE
# define _LONG_DOUBLE
typedef struct {
uint32_t word1, word2, word3, word4;
} long_double;
# endif /* _LONG_DOUBLE */
extern "C" char *_ldecvt(long_double, int, int *, int *);
extern "C" char *_ldfcvt(long_double, int, int *, int *);
#endif
#endif /* __hpux */
_STLP_BEGIN_NAMESPACE
#if defined (__MWERKS__) || defined(__BEOS__)
# define USE_SPRINTF_INSTEAD
#endif
# if defined (_AIX)
// Some OS'es only provide non-reentrant primitives, so we have to use additional synchronization here
# ifdef _REENTRANT
static _STLP_STATIC_MUTEX __put_float_mutex _STLP_MUTEX_INITIALIZER;
# define LOCK_CVT _STLP_auto_lock lock(__put_float_mutex);
# define RETURN_CVT(ecvt, x, n, pt, sign, buf) strcpy(buf, ecvt(x, n, pt, sign)); return buf;
# else
# define LOCK_CVT
# define RETURN_CVT(ecvt, x, n, pt, sign, buf) return ecvt(x, n, pt, sign);
# endif
# endif
// Tests for infinity and NaN differ on different OSs. We encapsulate
// these differences here.
#ifdef USE_SPRINTF_INSTEAD
#elif defined (__hpux) || defined (__DJGPP) || ( defined(_STLP_USE_GLIBC) && ! defined (__MSL__) )
# if defined (isfinite)
inline bool _Stl_is_nan_or_inf(double x) { return !isfinite(x); }
# else
inline bool _Stl_is_nan_or_inf(double x) { return !finite(x); }
# endif
inline bool _Stl_is_neg_nan(double x) { return isnan(x) && ( copysign(1., x) < 0 ); }
inline bool _Stl_is_inf(double x) { return isinf(x); }
// inline bool _Stl_is_neg_inf(double x) { return isinf(x) < 0; }
inline bool _Stl_is_neg_inf(double x) { return isinf(x) && x < 0; }
#elif defined(__unix) && !defined(__FreeBSD__) && !defined(__NetBSD__) \
&& !defined(__APPLE__) && !defined(__DJGPP) && !defined(__osf__) \
&& !defined(_CRAY)
inline bool _Stl_is_nan_or_inf(double x) { return IsNANorINF(x); }
inline bool _Stl_is_inf(double x) { return IsNANorINF(x) && IsINF(x); }
inline bool _Stl_is_neg_inf(double x) { return (IsINF(x)) && (x < 0.0); }
inline bool _Stl_is_neg_nan(double x) { return IsNegNAN(x); }
# elif defined (__BORLANDC__) && ( __BORLANDC__ < 0x540 )
inline bool _Stl_is_nan_or_inf(double x) { return !_finite(x); }
inline bool _Stl_is_inf(double x) { return _Stl_is_nan_or_inf(x) && ! _isnan(x);}
inline bool _Stl_is_neg_inf(double x) { return _Stl_is_inf(x) && x < 0 ; }
inline bool _Stl_is_neg_nan(double x) { return _isnan(x) && x < 0 ; }
#elif defined (_MSC_VER) || (defined (__MINGW32__) && !defined (__SYMBIAN32__)) || defined (__BORLANDC__)
inline bool _Stl_is_nan_or_inf(double x) { return !_finite(x); }
inline bool _Stl_is_inf(double x) {
int fclass = _fpclass(x);
return fclass == _FPCLASS_NINF || fclass == _FPCLASS_PINF;
}
inline bool _Stl_is_neg_inf(double x) { return _fpclass(x) == _FPCLASS_NINF; }
inline bool _Stl_is_neg_nan(double x) { return _isnan(x) && _copysign(1., x) < 0 ; }
#elif defined(__MRC__) || defined(__SC__) //*TY 02/24/2000 - added support for MPW
bool _Stl_is_nan_or_inf(double x) { return isnan(x) || !isfinite(x); }
bool _Stl_is_inf(double x) { return !isfinite(x); }
bool _Stl_is_neg_inf(double x) { return !isfinite(x) && signbit(x); }
bool _Stl_is_neg_nan(double x) { return isnan(x) && signbit(x); }
#elif /* defined (__FreeBSD__) */ ( defined (__GNUC__) && defined (__APPLE__) )
inline bool _Stl_is_nan_or_inf(double x) { return !finite(x); }
inline bool _Stl_is_inf(double x) { return _Stl_is_nan_or_inf(x) && ! isnan(x); }
inline bool _Stl_is_neg_inf(double x) { return _Stl_is_inf(x) && x < 0 ; }
inline bool _Stl_is_neg_nan(double x) { return isnan(x) && copysign(1., x) < 0 ; }
#elif defined( _AIX ) // JFA 11-Aug-2000
bool _Stl_is_nan_or_inf(double x) { return isnan(x) || !finite(x); }
bool _Stl_is_inf(double x) { return !finite(x); }
// bool _Stl_is_neg_inf(double x) { return _class(x) == FP_MINUS_INF; }
bool _Stl_is_neg_inf(double x) { return _Stl_is_inf(x) && ( copysign(1., x) < 0 ); }
bool _Stl_is_neg_nan(double x) { return isnan(x) && ( copysign(1., x) < 0 ); }
#elif defined (__ISCPP__)
inline bool _Stl_is_nan_or_inf (double x) { return _fp_isINF(x) || _fp_isNAN(x); }
inline bool _Stl_is_inf (double x) { return _fp_isINF(x); }
inline bool _Stl_is_neg_inf (double x) { return _fp_isINF(x) && x < 0; }
inline bool _Stl_is_neg_nan (double x) { return _fp_isNAN(x) && x < 0; }
#elif defined(_CRAY)
#if defined(_CRAYIEEE)
inline bool _Stl_is_nan_or_inf(double x) { return isnan(x) || isinf(x); }
inline bool _Stl_is_inf(double x) { return isinf(x); }
inline bool _Stl_is_neg_inf(double x) { return isinf(x) && signbit(x); }
inline bool _Stl_is_neg_nan(double x) { return isnan(x) && signbit(x); }
#else
inline bool _Stl_is_nan_or_inf(double x) { return false; }
inline bool _Stl_is_inf(double x) { return false; }
inline bool _Stl_is_neg_inf(double x) { return false; }
inline bool _Stl_is_neg_nan(double x) { return false; }
#endif
#elif ! defined (USE_SPRINTF_INSTEAD)
# define USE_SPRINTF_INSTEAD
#endif
# ifndef USE_SPRINTF_INSTEAD
// Reentrant versions of floating-point conversion functions. The argument
// lists look slightly different on different operating systems, so we're
// encapsulating the differences here.
#if defined (__CYGWIN__) || defined(__DJGPP)
inline char* _Stl_ecvtR(double x, int n, int* pt, int* sign, char* buf)
{ return ecvtbuf(x, n, pt, sign, buf); }
inline char* _Stl_fcvtR(double x, int n, int* pt, int* sign, char* buf)
{ return fcvtbuf(x, n, pt, sign, buf); }
# ifndef _STLP_NO_LONG_DOUBLE
inline char* _Stl_qecvtR(long double x, int n, int* pt, int* sign, char* buf)
{ return ecvtbuf(x, n, pt, sign, buf); }
inline char* _Stl_qfcvtR(long double x, int n, int* pt, int* sign, char* buf)
{ return fcvtbuf(x, n, pt, sign, buf); }
# endif
#elif defined (_STLP_USE_GLIBC)
inline char* _Stl_ecvtR(double x, int n, int* pt, int* sign, char* buf)
{ return buf + ecvt_r(x, n, pt, sign, buf, NDIG+2); }
inline char* _Stl_fcvtR(double x, int n, int* pt, int* sign, char* buf)
{ return buf + fcvt_r(x, n, pt, sign, buf, NDIG+2); }
# ifndef _STLP_NO_LONG_DOUBLE
inline char* _Stl_qecvtR(long double x, int n, int* pt, int* sign, char* buf)
{ return buf + qecvt_r(x, n, pt, sign, buf, NDIG+2); }
inline char* _Stl_qfcvtR(long double x, int n, int* pt, int* sign, char* buf)
{ return buf + qfcvt_r(x, n, pt, sign, buf, NDIG+2); }
# endif
#elif defined (_STLP_SCO_OPENSERVER) || defined (__NCR_SVR)
inline char* _Stl_ecvtR(double x, int n, int* pt, int* sign, char* buf)
{ return ecvt(x, n, pt, sign); }
inline char* _Stl_fcvtR(double x, int n, int* pt, int* sign, char* buf)
{ return fcvt(x, n, pt, sign); }
# ifndef _STLP_NO_LONG_DOUBLE
inline char* _Stl_qecvtR(long double x, int n, int* pt, int* sign, char* buf)
{ return ecvtl(x, n, pt, sign); }
inline char* _Stl_qfcvtR(long double x, int n, int* pt, int* sign, char* buf)
{ return fcvtl(x, n, pt, sign); }
# endif
#elif defined (__sun)
inline char* _Stl_ecvtR(double x, int n, int* pt, int* sign, char* buf)
{ return econvert(x, n, pt, sign, buf); }
inline char* _Stl_fcvtR(double x, int n, int* pt, int* sign, char* buf)
{ return fconvert(x, n, pt, sign, buf); }
# ifndef _STLP_NO_LONG_DOUBLE
inline char* _Stl_qecvtR(long double x, int n, int* pt, int* sign, char* buf)
{ return qeconvert(&x, n, pt, sign, buf); }
inline char* _Stl_qfcvtR(long double x, int n, int* pt, int* sign, char* buf)
{ return qfconvert(&x, n, pt, sign, buf); }
# endif
#elif defined (__DECCXX)
inline char* _Stl_ecvtR(double x, int n, int* pt, int* sign, char* buf)
{ return (ecvt_r(x, n, pt, sign, buf, NDIG)==0 ? buf : 0); }
inline char* _Stl_fcvtR(double x, int n, int* pt, int* sign, char* buf)
{ return (fcvt_r(x, n, pt, sign, buf, NDIG)==0 ? buf : 0); }
# ifndef _STLP_NO_LONG_DOUBLE
// fbp : no "long double" conversions !
inline char* _Stl_qecvtR(long double x, int n, int* pt, int* sign, char* buf)
{ return (ecvt_r((double)x, n, pt, sign, buf, NDIG)==0 ? buf : 0) ; }
inline char* _Stl_qfcvtR(long double x, int n, int* pt, int* sign, char* buf)
{ return (fcvt_r((double)x, n, pt, sign, buf, NDIG)==0 ? buf : 0); }
# endif
#elif defined (__hpux)
inline char* _Stl_ecvtR(double x, int n, int* pt, int* sign, char* buf)
{ return ecvt(x, n, pt, sign); }
inline char* _Stl_fcvtR(double x, int n, int* pt, int* sign, char* buf)
{ return fcvt(x, n, pt, sign); }
# ifndef _STLP_NO_LONG_DOUBLE
# if defined( _REENTRANT ) && (defined(_PTHREADS_DRAFT4) || defined(PTHREAD_THREADS_MAX))
inline char* _Stl_qecvtR(long double x, int n, int* pt, int* sign, char* buf)
{ return (_ldecvt_r(*(long_double*)&x, n, pt, sign, buf, NDIG+2)==0 ? buf : 0); }
inline char* _Stl_qfcvtR(long double x, int n, int* pt, int* sign, char* buf)
{ return (_ldfcvt_r(*(long_double*)&x, n, pt, sign, buf, NDIG+2)==0 ? buf : 0); }
# else
inline char* _Stl_qecvtR(long double x, int n, int* pt, int* sign, char* buf)
{ return _ldecvt(*(long_double*)&x, n, pt, sign); }
inline char* _Stl_qfcvtR(long double x, int n, int* pt, int* sign, char* buf)
{ return _ldfcvt(*(long_double*)&x, n, pt, sign); }
# endif
# endif
#elif defined (_AIX)
inline char* _Stl_ecvtR(double x, int n, int* pt, int* sign, char* buf)
{ LOCK_CVT RETURN_CVT(ecvt, x, n, pt, sign, buf) }
inline char* _Stl_fcvtR(double x, int n, int* pt, int* sign, char* buf)
{ LOCK_CVT RETURN_CVT(fcvt, x, n, pt, sign, buf) }
# ifndef _STLP_NO_LONG_DOUBLE
inline char* _Stl_qecvtR(long double x, int n, int* pt, int* sign, char* buf)
{ LOCK_CVT RETURN_CVT(ecvt, x, n, pt, sign, buf) }
inline char* _Stl_qfcvtR(long double x, int n, int* pt, int* sign, char* buf)
{ LOCK_CVT RETURN_CVT(fcvt, x, n, pt, sign, buf) }
# endif
#elif defined (__unix) && !defined(__FreeBSD__) && !defined(__NetBSD__) && !defined(__APPLE__) && !defined(_CRAY)
inline char* _Stl_ecvtR(double x, int n, int* pt, int* sign, char* buf)
{ return ecvt_r(x, n, pt, sign, buf); }
inline char* _Stl_fcvtR(double x, int n, int* pt, int* sign, char* buf)
{ return fcvt_r(x, n, pt, sign, buf); }
# ifndef _STLP_NO_LONG_DOUBLE
inline char* _Stl_qecvtR(long double x, int n, int* pt, int* sign, char* buf)
{ return qecvt_r(x, n, pt, sign, buf); }
inline char* _Stl_qfcvtR(long double x, int n, int* pt, int* sign, char* buf)
{ return qfcvt_r(x, n, pt, sign, buf); }
# endif
#elif defined (_MSC_VER) || defined (__MINGW32__) || defined (__BORLANDC__)
// those guys claim _cvt functions being reentrant.
inline char* _Stl_ecvtR(double x, int n, int* pt, int* sign, char* buf) { return _ecvt(x, n, pt, sign); }
inline char* _Stl_fcvtR(double x, int n, int* pt, int* sign, char* buf) { return _fcvt(x, n, pt, sign); }
# ifndef _STLP_NO_LONG_DOUBLE
inline char* _Stl_qecvtR(long double x, int n, int* pt, int* sign, char* buf) { return _ecvt((double)x, n, pt, sign); }
inline char* _Stl_qfcvtR(long double x, int n, int* pt, int* sign, char* buf) { return _fcvt((double)x, n, pt, sign); }
# endif
#elif defined (__ISCPP__)
inline char* _Stl_ecvtR(double x, int n, int* pt, int* sign, char* buf)
{ return _fp_ecvt( x, n, pt, sign, buf); }
inline char* _Stl_fcvtR(double x, int n, int* pt, int* sign, char* buf)
{ return _fp_fcvt(x, n, pt, sign, buf); }
# ifndef _STLP_NO_LONG_DOUBLE
inline char* _Stl_qecvtR(long double x, int n, int* pt, int* sign, char* buf)
{ return _fp_ecvt( x, n, pt, sign, buf); }
inline char* _Stl_qfcvtR(long double x, int n, int* pt, int* sign, char* buf)
{ return _fp_fcvt(x, n, pt, sign, buf); }
# endif
#elif defined (__MRC__) || defined(__SC__) || defined(_CRAY)
inline char* _Stl_ecvtR(double x, int n, int* pt, int* sign, char* )
{ return ecvt( x, n, pt, sign ); }
inline char* _Stl_fcvtR(double x, int n, int* pt, int* sign, char* )
{ return fcvt(x, n, pt, sign); }
#ifndef _STLP_NO_LONG_DOUBLE
inline char* _Stl_qecvtR(long double x, int n, int* pt, int* sign, char* )
{ return ecvt( x, n, pt, sign ); }
inline char* _Stl_qfcvtR(long double x, int n, int* pt, int* sign, char* )
{ return fcvt(x, n, pt, sign); }
#endif
#endif
//----------------------------------------------------------------------
// num_put
// Helper functions for _M_do_put_float
// __format_float formats a mantissa and exponent as returned by
// one of the conversion functions (ecvt_r, fcvt_r, qecvt_r, qfcvt_r)
// according to the specified precision and format flags. This is
// based on doprnt but is much simpler since it is concerned only
// with floating point input and does not consider all formats. It
// also does not deal with blank padding, which is handled by
// __copy_float_and_fill.
void __format_float_scientific(char * buf, const char * bp,
int decpt, int sign, bool is_zero,
ios_base::fmtflags flags,
int precision, bool /* islong */)
{
char * suffix;
char expbuf[MAXESIZ + 2];
// sign if required
if (sign)
*buf++ = '-';
else if (flags & ios_base::showpos)
*buf++ = '+';
// first digit of mantissa
*buf++ = *bp++;
// decimal point if required
if (precision != 0 || flags & ios_base::showpoint)
*buf++ = '.';
// rest of mantissa
int rz = precision;
while (rz-- > 0 && *bp != 0)
*buf++ = *bp++;
// exponent
*(suffix = &expbuf[MAXESIZ]) = 0;
if (!is_zero) {
int nn = decpt - 1;
if (nn < 0)
nn = -nn;
for (; nn > 9; nn /= 10)
*--suffix = (char) todigit(nn % 10);
*--suffix = (char) todigit(nn);
}
// prepend leading zeros to exponent
while (suffix > &expbuf[MAXESIZ - 2])
*--suffix = '0';
// put in the exponent sign
*--suffix = (char) ((decpt > 0 || is_zero ) ? '+' : '-');
// put in the e
*--suffix = flags & ios_base::uppercase ? 'E' : 'e';
// copy the suffix
strcpy(buf, suffix);
}
static inline
void __flush_static_buf(string &buf,
char *sbeginbuf, char *sendbuf, char *&scurpos) {
if (scurpos == sendbuf) {
buf.append(sbeginbuf, sendbuf);
scurpos = sbeginbuf;
}
}
void __format_float_fixed(string &buf, const char * bp,
int decpt, int sign, bool /* x */,
ios_base::fmtflags flags,
int precision, bool islong )
{
char static_buf[128];
char *sbuf = static_buf;
char *sendbuf = static_buf + sizeof(static_buf);
if (sign && decpt > -precision && *bp != 0)
*sbuf++ = '-';
else if (flags & ios_base::showpos)
*sbuf++ = '+';
int rzero = 0;
int nn = decpt;
int k = 0;
int maxfsig = islong ? 2*MAXFSIG : MAXFSIG;
do {
*sbuf++ = (char) ((nn <= 0 || *bp == 0 || k >= maxfsig) ?
'0' : (k++, *bp++));
__flush_static_buf(buf, static_buf, sendbuf, sbuf);
} while (--nn > 0);
// decimal point if needed
if (flags & ios_base::showpoint || precision > 0) {
*sbuf++ = '.';
__flush_static_buf(buf, static_buf, sendbuf, sbuf);
}
// digits after decimal point if any
nn = (min) (precision, MAXFCVT);
if (precision > nn)
rzero = precision - nn;
while (--nn >= 0) {
*sbuf++ = (++decpt <= 0 || *bp == '\0' || k >= maxfsig)
? '0' : (k++, *bp++);
__flush_static_buf(buf, static_buf, sendbuf, sbuf);
}
// trailing zeros if needed
while (rzero-- > 0) {
*sbuf++ = '0';
__flush_static_buf(buf, static_buf, sendbuf, sbuf);
}
buf.append(static_buf, sbuf);
}
void __format_nan_or_inf(char * buf, double x,
ios_base::fmtflags flags)
{
static const char* inf[2] = { "inf", "Inf" };
static const char* nan[2] = { "nan", "NaN" };
const char** inf_or_nan = 0;
if (_Stl_is_inf((double)x)) { // Infinity
inf_or_nan = inf;
if (_Stl_is_neg_inf((double)x))
*buf++ = '-';
else if (flags & ios_base::showpos)
*buf++ = '+';
}
else { // NaN
inf_or_nan = nan;
if (_Stl_is_neg_nan((double)x))
*buf++ = '-';
else if (flags & ios_base::showpos)
*buf++ = '+';
}
strcpy(buf, flags & ios_base::uppercase ? inf_or_nan[1] : inf_or_nan[0]);
}
template <class max_double_type>
static inline
void __format_float(string &buf, const char * bp,
int decpt, int sign, max_double_type x,
ios_base::fmtflags flags,
int precision, bool islong)
{
char static_buf[128];
// Output of infinities and NANs does not depend on the format flags
if (_Stl_is_nan_or_inf((double)x)) { // Infinity or NaN
__format_nan_or_inf(static_buf, x, flags);
buf = static_buf;
}
else { // representable number
switch (flags & ios_base::floatfield) {
case ios_base::scientific:
__format_float_scientific(static_buf, bp, decpt, sign, x == 0.0, flags,
precision, islong);
buf = static_buf;
break;
case ios_base::fixed:
__format_float_fixed(buf, bp, decpt, sign, true, flags,
precision, islong);
break;
default: // g format
// establish default precision
if (flags & ios_base::showpoint || precision > 0) {
if (precision == 0) precision = 1;
}
else
precision = 6;
// reset exponent if value is zero
if (x == 0)
decpt = 1;
int kk = precision;
if (!(flags & ios_base::showpoint)) {
size_t n = strlen(bp);
if (n < kk)
kk = (int)n;
while (kk >= 1 && bp[kk-1] == '0')
--kk;
}
if (decpt < -3 || decpt > precision) {
precision = kk - 1;
__format_float_scientific(static_buf, bp, decpt, sign, x == 0,
flags, precision, islong);
buf = static_buf;
}
else {
precision = kk - decpt;
__format_float_fixed(buf, bp, decpt, sign, true,
flags, precision, islong);
}
break;
} /* switch */
} /* else */
}
# else
// Creates a format string for sprintf()
static int fill_fmtbuf(char* fmtbuf, ios_base::fmtflags flags, char long_modifier)
{
fmtbuf[0] = '%';
int i = 1;
if (flags & ios_base::showpos)
fmtbuf[i++] = '+';
if (flags & ios_base::showpoint)
fmtbuf[i++] = '#';
fmtbuf[i++] = '.';
fmtbuf[i++] = '*';
if (long_modifier)
fmtbuf[i++] = long_modifier;
switch (flags & ios_base::floatfield)
{
case ios_base::scientific:
fmtbuf[i++] = (flags & ios_base::uppercase) ? 'E' : 'e';
break;
case ios_base::fixed:
#if defined (__FreeBSD__)
fmtbuf[i++] = 'f';
#else
fmtbuf[i++] = (flags & ios_base::uppercase) ? 'F' : 'f';
#endif
break;
default:
fmtbuf[i++] = (flags & ios_base::uppercase) ? 'G' : 'g';
break;
}
fmtbuf[i] = 0;
return i;
}
# endif /* USE_SPRINTF_INSTEAD */
_STLP_EXP_DECLSPEC void _STLP_CALL
__write_float(string &buf, ios_base::fmtflags flags, int precision,
double x)
{
# ifdef USE_SPRINTF_INSTEAD
char static_buf[256+10];//+2 - 10/1/07
char fmtbuf[32];
fill_fmtbuf(fmtbuf, flags, 0);
sprintf(static_buf, fmtbuf, precision, x);
// we should be able to return static_buf + sprintf(), but we do not trust'em...
buf = static_buf;
# else
char cvtbuf[NDIG+2];
char * bp;
int decpt, sign;
switch (flags & ios_base::floatfield) {
case ios_base::fixed:
bp = _Stl_fcvtR(x, (min) (precision, MAXFCVT), &decpt, &sign, cvtbuf);
break;
case ios_base::scientific :
bp = _Stl_ecvtR(x, (min) (precision + 1, MAXECVT), &decpt, &sign, cvtbuf);
break;
default :
bp = _Stl_ecvtR(x, (min) (precision, MAXECVT), &decpt, &sign, cvtbuf);
break;
}
__format_float(buf, bp, decpt, sign, x, flags, precision, false);
# endif
}
# ifndef _STLP_NO_LONG_DOUBLE
_STLP_EXP_DECLSPEC void _STLP_CALL
__write_float(string &buf, ios_base::fmtflags flags, int precision,
long double x)
{
# ifdef USE_SPRINTF_INSTEAD
char static_buf[128];
char fmtbuf[64];
int i = fill_fmtbuf(fmtbuf, flags, 'L');
sprintf(static_buf, fmtbuf, precision, x);
// we should be able to return buf + sprintf(), but we do not trust'em...
buf = static_buf;
# else
char cvtbuf[NDIG+2];
char * bp;
int decpt, sign;
switch (flags & ios_base::floatfield) {
case ios_base::fixed:
bp = _Stl_qfcvtR(x, (min) (precision, MAXFCVT), &decpt, &sign, cvtbuf);
break;
case ios_base::scientific :
bp = _Stl_qecvtR(x, (min) (precision + 1, MAXECVT), &decpt, &sign, cvtbuf);
break;
default :
bp = _Stl_qecvtR(x, (min) (precision, MAXECVT), &decpt, &sign, cvtbuf);
break;
}
__format_float(buf, bp, decpt, sign, x, flags, precision, true);
# endif
}
# endif
# ifndef _STLP_NO_WCHAR_T
_STLP_EXP_DECLSPEC wchar_t* _STLP_CALL
__convert_float_buffer(const char* first, const char* last, wchar_t* out,
const ctype<wchar_t>& ct, wchar_t dot)
{
ct.widen(first, last, out);
if (ct.widen('.') != dot)
replace(out, out + (last - first), ct.widen('.'), dot);
return out + (last - first);
}
# endif
_STLP_EXP_DECLSPEC void _STLP_CALL
__adjust_float_buffer(char* first, char* last, char dot)
{
if ('.' != dot)
replace(first, last, '.', dot);
}
_STLP_END_NAMESPACE
// Local Variables:
// mode:C++
// End: