11dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project/* $OpenBSD: wsetup.c,v 1.7 2005/08/08 08:05:36 espie Exp $ */ 21dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project/*- 31dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Copyright (c) 1990, 1993 41dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * The Regents of the University of California. All rights reserved. 51dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 61dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * This code is derived from software contributed to Berkeley by 71dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Chris Torek. 81dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 91dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Redistribution and use in source and binary forms, with or without 101dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * modification, are permitted provided that the following conditions 111dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * are met: 121dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 1. Redistributions of source code must retain the above copyright 131dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * notice, this list of conditions and the following disclaimer. 141dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 2. Redistributions in binary form must reproduce the above copyright 151dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * notice, this list of conditions and the following disclaimer in the 161dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * documentation and/or other materials provided with the distribution. 171dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 3. Neither the name of the University nor the names of its contributors 181dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * may be used to endorse or promote products derived from this software 191dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * without specific prior written permission. 201dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 211dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 221dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 231dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 241dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 251dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 261dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 271dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 281dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 291dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 301dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 311dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * SUCH DAMAGE. 321dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 331dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 341dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <stdio.h> 351dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <stdlib.h> 361dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include "local.h" 371dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 381dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project/* 391dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Various output routines call wsetup to be sure it is safe to write, 401dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * because either _flags does not include __SWR, or _buf is NULL. 411dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * _wsetup returns 0 if OK to write, nonzero otherwise. 421dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 431dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectint 441dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project__swsetup(FILE *fp) 451dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project{ 461dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project /* make sure stdio is set up */ 471dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (!__sdidinit) 481dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project __sinit(); 491dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 501dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project /* 511dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * If we are not writing, we had better be reading and writing. 521dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 531dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if ((fp->_flags & __SWR) == 0) { 541dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if ((fp->_flags & __SRW) == 0) 551dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return (EOF); 561dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (fp->_flags & __SRD) { 571dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project /* clobber any ungetc data */ 581dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (HASUB(fp)) 591dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project FREEUB(fp); 601dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project fp->_flags &= ~(__SRD|__SEOF); 611dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project fp->_r = 0; 621dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project fp->_p = fp->_bf._base; 631dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 641dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project fp->_flags |= __SWR; 651dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 661dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 671dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project /* 681dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Make a buffer if necessary, then set _w. 691dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 701dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (fp->_bf._base == NULL) { 711dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if ((fp->_flags & (__SSTR | __SALC)) == __SSTR) 721dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return (EOF); 731dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project __smakebuf(fp); 741dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 751dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (fp->_flags & __SLBF) { 761dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project /* 771dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * It is line buffered, so make _lbfsize be -_bufsize 781dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * for the putc() macro. We will change _lbfsize back 791dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * to 0 whenever we turn off __SWR. 801dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 811dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project fp->_w = 0; 821dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project fp->_lbfsize = -fp->_bf._size; 831dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } else 841dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project fp->_w = fp->_flags & __SNBF ? 0 : fp->_bf._size; 851dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return (0); 861dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project} 87