1/*********************************************************************** 2* * 3* This software is part of the ast package * 4* Copyright (c) 1985-2011 AT&T Intellectual Property * 5* and is licensed under the * 6* Eclipse Public License, Version 1.0 * 7* by AT&T Intellectual Property * 8* * 9* A copy of the License is available at * 10* http://www.eclipse.org/org/documents/epl-v10.html * 11* (with md5 checksum b35adb5213ca9657e911e9befb180842) * 12* * 13* Information and Software Systems Research * 14* AT&T Research * 15* Florham Park NJ * 16* * 17* Glenn Fowler <gsf@research.att.com> * 18* David Korn <dgk@research.att.com> * 19* Phong Vo <kpv@research.att.com> * 20* * 21***********************************************************************/ 22#pragma prototyped 23 24#include "stdhdr.h" 25 26int 27fwide(Sfio_t* f, int mode) 28{ 29 STDIO_INT(f, "fwide", int, (Sfio_t*, int), (f, mode)) 30 31 if (mode > 0) 32 { 33 f->bits &= ~SF_MB; 34 f->bits |= SF_WC; 35 } 36 else if (mode < 0) 37 { 38 f->bits &= ~SF_WC; 39 f->bits |= SF_MB; 40 } 41 if (f->bits & SF_MB) 42 return -1; 43 if (f->bits & SF_WC) 44 return 1; 45 if ((f->flags & SF_SYNCED) || f->next > f->data) 46 { 47 f->bits |= SF_MB; 48 return -1; 49 } 50 return 0; 51} 52