/*** * istrshrt.cxx - definitions for istream class operator>>(short) function(s) * * Copyright (c) 1991-1992, Microsoft Corporation. All rights reserved. * *Purpose: * Definitions of operator>>(short) member function(s) for istream class. * [AT&T C++] * *Revision History: * 09-26-91 KRS Created. Split off from istream.cxx for granularity. * 12-30-92 KRS Fix indirection problem with **endptr. * *******************************************************************************/ #include <cruntime.h> #include <internal.h> #include <stdlib.h> #include <limits.h> #include <iostream.h> #pragma hdrstop // CONSIDER: validify this maximum length #define MAXLONGSIZ 16 /*** *istream& istream::operator>>(short& n) - extract short * *Purpose: * Extract short value from stream * *Entry: * n = value to update * *Exit: * n updated, or ios::failbit & n=SHRT_MAX/SHRT_MIN on overflow/underflow * *Exceptions: * Stream error on entry or value out of range * *******************************************************************************/ istream& istream::operator>>(short& n) { _WINSTATIC char ibuffer[MAXLONGSIZ]; long value; char ** endptr = (char**)NULL; if (ipfx(0)) { value = strtol(ibuffer, endptr, getint(ibuffer)); if (value>SHRT_MAX) { n = SHRT_MAX; state |= ios::failbit; } else if (value<SHRT_MIN) { n = SHRT_MIN; state |= ios::failbit; } else n = (short) value; #if 0 if (**endptr) { //UNDONE: put back any unread characters, if possible } #endif isfx(); } return *this; }