You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
66 lines
1.8 KiB
66 lines
1.8 KiB
/***
|
|
* ostrdbl.cpp - definitions for ostream class operator<<(double) functions
|
|
*
|
|
* Copyright (c) 1991-2001, Microsoft Corporation. All rights reserved.
|
|
*
|
|
*Purpose:
|
|
* Contains the member function definitions for ostream operator<<(double).
|
|
*
|
|
*Revision History:
|
|
* 09-23-91 KRS Created. Split out from ostream.cxx for granularity.
|
|
* 10-24-91 KRS Combine float version with double.
|
|
* 06-14-95 CFW Comment cleanup.
|
|
*
|
|
*******************************************************************************/
|
|
|
|
#include <cruntime.h>
|
|
#include <internal.h>
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <float.h>
|
|
#include <iostream.h>
|
|
#pragma hdrstop
|
|
|
|
#pragma check_stack(on) // large buffer(s)
|
|
|
|
ostream& ostream::operator<<(double f)
|
|
{
|
|
_WINSTATIC char obuffer[24];
|
|
_WINSTATIC char fmt[8];
|
|
_WINSTATIC char leader[4];
|
|
char * optr = obuffer;
|
|
int x = 0;
|
|
|
|
// x_floatused nonzero indicates called for float, not double
|
|
unsigned int curprecision = (x_floatused) ? FLT_DIG : DBL_DIG;
|
|
x_floatused = 0; // reset for next call
|
|
|
|
curprecision = __min((unsigned)x_precision,curprecision);
|
|
|
|
if (opfx()) {
|
|
if (x_flags & ios::showpos)
|
|
leader[x++] = '+';
|
|
if (x_flags & ios::showpoint)
|
|
leader[x++] = '#'; // show decimal and trailing zeros
|
|
leader[x] = '\0';
|
|
x = sprintf(fmt,"%%%s.%.0ug",leader,curprecision) - 1;
|
|
if ((x_flags & ios::floatfield)==ios::fixed)
|
|
fmt[x] = 'f';
|
|
else
|
|
{
|
|
if ((x_flags & ios::floatfield)==ios::scientific)
|
|
fmt[x] = 'e';
|
|
if (x_flags & uppercase)
|
|
fmt[x] = (char)toupper(fmt[x]);
|
|
}
|
|
|
|
sprintf(optr,fmt,f);
|
|
x = 0;
|
|
if (*optr=='+' || *optr=='-')
|
|
leader[x++] = *(optr++);
|
|
leader[x] = '\0';
|
|
writepad(leader,optr);
|
|
osfx();
|
|
}
|
|
return *this;
|
|
}
|