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.
65 lines
1.5 KiB
65 lines
1.5 KiB
/***
|
|
* istrint.cpp - definitions for istream class operaotor>>(int) member functions
|
|
*
|
|
* Copyright (c) 1991-2001, Microsoft Corporation. All rights reserved.
|
|
*
|
|
*Purpose:
|
|
* Definitions of operator>>(int) member function(s) 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.
|
|
* 05-24-94 GJF Moved definition of MAXLONGSIZ to istream.h.
|
|
* 06-14-95 CFW Comment cleanup.
|
|
*
|
|
*******************************************************************************/
|
|
|
|
#include <cruntime.h>
|
|
#include <internal.h>
|
|
#include <stdlib.h>
|
|
#include <limits.h>
|
|
#include <iostream.h>
|
|
#pragma hdrstop
|
|
|
|
/***
|
|
*istream& istream::operator>>(int& n) - extract int
|
|
*
|
|
*Purpose:
|
|
* Extract int value from stream
|
|
*
|
|
*Entry:
|
|
* n = value to update
|
|
*
|
|
*Exit:
|
|
* n updated, or ios::failbit & n=INT_MAX/INT_MIN on overflow/underflow
|
|
*
|
|
*Exceptions:
|
|
* Stream error on entry or value out of range
|
|
*
|
|
*******************************************************************************/
|
|
istream& istream::operator>>(int& n)
|
|
{
|
|
_WINSTATIC char ibuffer[MAXLONGSIZ];
|
|
long value;
|
|
char ** endptr = (char**)NULL;
|
|
if (ipfx(0))
|
|
{
|
|
value = strtol(ibuffer, endptr, getint(ibuffer));
|
|
if (value>INT_MAX)
|
|
{
|
|
n = INT_MAX;
|
|
state |= ios::failbit;
|
|
}
|
|
else if (value<INT_MIN)
|
|
{
|
|
n = INT_MIN;
|
|
state |= ios::failbit;
|
|
}
|
|
else
|
|
n = (int) value;
|
|
|
|
isfx();
|
|
}
|
|
return *this;
|
|
}
|