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/***
* istrflt.cxx - definitions for istream operator>>(float) member function
*
* Copyright (c) 1991-1992, Microsoft Corporation. All rights reserved.
*
*Purpose:
* Definitions of operator>>(float) member function for istream class.
* [AT&T C++]
*
*Revision History:
* 09-26-91 KRS Created. Split out from istream.cxx for granularity.
* 12-30-92 KRS Fix indirection problem with **endptr.
*
*******************************************************************************/
#include <cruntime.h>
#include <internal.h>
#include <stdlib.h>
#include <float.h>
#include <iostream.h>
#pragma hdrstop
#pragma check_stack(on) // large buffer(s)
// CONSIDER: validate this maximum length
#define MAXFLTSIZ 20
istream& istream::operator>>(float& n)
{
_WINSTATIC char ibuffer[MAXFLTSIZ];
double d;
char ** endptr = (char**)NULL;
if (ipfx(0))
{
if (getdouble(ibuffer, MAXFLTSIZ)>0)
{
d = strtod(ibuffer, endptr);
#if 0
if (**endptr)
{
//UNDONE: put back any unread characters, if possible
}
#endif
if (d > FLT_MAX)
n = FLT_MAX;
else if (d < -FLT_MAX)
n = -FLT_MAX;
else if ((d>0) && (d< FLT_MIN))
n = FLT_MIN;
else if ((d<0) && (d> -FLT_MIN))
n = - FLT_MIN;
else
n = (float) d;
}
isfx();
}
return *this;
}
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