void __LDFloatToString( char *buf,
double const *f,
int precision,
std::ios::fmtflags format_flags ) {
int i;
CVT_INFO cvt;
long_double ld;
auto char stkbuf[34];
#ifdef _LONG_DOUBLE_
double double_value;
/* convert this double into a long double */
double_value = *f;
__EFG_cnvd2ld( &double_value, &ld );
#else
ld.u.value = *f;
#endif
if( (format_flags & (std::ios::scientific|ios::fixed)) == std::ios::scientific ) {
cvt.flags = E_FMT;
cvt.scale = 1;
} else if( (format_flags & (std::ios::scientific|ios::fixed)) == std::ios::fixed ) {
cvt.flags = F_FMT;
cvt.scale = 0;
} else {
cvt.flags = G_FMT;
cvt.scale = 1;
if( precision == 0 ) {
precision = 1;
}
}
if( (format_flags & std::ios::showpoint) ) {
cvt.flags |= F_DOT;
}
cvt.ndigits = precision;
cvt.expchar = (format_flags & std::ios::uppercase) ? 'E' : 'e';
cvt.expwidth = 0;
__EFG_cvtld( &ld, &cvt, stkbuf );
// put all the pieces together
i = 0;
if( cvt.sign < 0 ) {
buf[i++] = '-';
} else if( format_flags & std::ios::showpos ) {
buf[i++] = '+';
}
if( cvt.n1 != 0 ) {
memcpy( &buf[i], &stkbuf[0], cvt.n1 );
i += cvt.n1;
}
memset( &buf[i], '0', cvt.nz1 );
i += cvt.nz1;
if( cvt.n2 != 0 ) {
memcpy( &buf[i], &stkbuf[cvt.n1], cvt.n2 );
i += cvt.n2;
}
memset( &buf[i], '0', cvt.nz2 );
i += cvt.nz2;
buf[i] = '\0';
}
ostream &ostream::__outfloat( long double const &f ) {
int digit_offset;
int precision;
char buf[ LONGEST_FLOAT * 2 ];
long_double ld;
int i;
int len;
char *x;
CVT_INFO cvt;
auto char stkbuf[ LONGEST_FLOAT + 1 ];
std::ios::fmtflags format_flags;
#ifdef _LONG_DOUBLE_
double double_value;
/* convert this double into a long double */
double_value = f;
__EFG_cnvd2ld( &double_value, &ld );
#else
ld.value = f;
#endif
__lock_it( __i_lock );
precision = this->precision();
if( precision > MAX_PREC )
precision = MAX_PREC;
format_flags = this->flags();
if(( format_flags & ( std::ios::scientific | ios::fixed )) == std::ios::scientific ) {
cvt.flags = E_FMT;
cvt.scale = 1;
} else if(( format_flags & ( std::ios::scientific | ios::fixed )) == std::ios::fixed ) {
cvt.flags = F_FMT;
cvt.scale = 0;
} else {
cvt.flags = G_FMT;
cvt.scale = 1;
if( precision == 0 ) {
precision = 1;
}
}
if( format_flags & std::ios::showpoint ) {
cvt.flags |= F_DOT;
}
cvt.ndigits = precision;
cvt.expchar = ( format_flags & std::ios::uppercase ) ? 'E' : 'e';
cvt.expwidth = 0;
__EFG_cvtld( &ld, &cvt, stkbuf );
// put all the pieces together
len = cvt.n1 + cvt.nz1 + cvt.n2 + cvt.nz2 + 1;
if( cvt.sign < 0 ) {
++len;
} else if( format_flags & std::ios::showpos ) {
++len;
}
if( len > sizeof( buf ) ) {
x = new char[ len + 1 ];
} else {
x = buf;
}
i = 0;
digit_offset = 1;
if( cvt.sign < 0 ) {
x[i++] = '-';
} else if( format_flags & std::ios::showpos ) {
x[i++] = '+';
} else {
digit_offset = 0;
}
if( cvt.n1 != 0 ) {
::memcpy( &x[i], &stkbuf[0], cvt.n1 );
i += cvt.n1;
}
if( cvt.nz1 != 0 ) {
::memset( &x[i], '0', cvt.nz1 );
i += cvt.nz1;
}
if( cvt.n2 != 0 ) {
::memcpy( &x[i], &stkbuf[cvt.n1], cvt.n2 );
i += cvt.n2;
}
if( cvt.nz2 != 0 ) {
::memset( &x[i], '0', cvt.nz2 );
i += cvt.nz2;
}
x[i] = '\0';
if( opfx() ) {
setstate( __WATCOM_ios::writeitem( *this, x, ::strlen( x ), digit_offset ) );
osfx();
}
if( len > sizeof( buf ) ) {
delete x;
}
return( *this );
}
