/*

  * © 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: