133 lines
4.1 KiB
C
133 lines
4.1 KiB
C
/*
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* CDE - Common Desktop Environment
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*
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* Copyright (c) 1993-2012, The Open Group. All rights reserved.
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*
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* These libraries and programs are free software; you can
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* redistribute them and/or modify them under the terms of the GNU
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* Lesser General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* These libraries and programs are distributed in the hope that
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* they will be useful, but WITHOUT ANY WARRANTY; without even the
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* implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU Lesser General Public License for more
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* details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with these libraries and programs; if not, write
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* to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
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* Floor, Boston, MA 02110-1301 USA
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*/
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/* $XConsortium: sfflsbuf.c /main/3 1995/11/01 18:29:15 rswiston $ */
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/***************************************************************
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* *
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* AT&T - PROPRIETARY *
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* *
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* THIS IS PROPRIETARY SOURCE CODE LICENSED BY *
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* AT&T CORP. *
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* *
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* Copyright (c) 1995 AT&T Corp. *
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* All Rights Reserved *
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* *
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* This software is licensed by AT&T Corp. *
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* under the terms and conditions of the license in *
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* http://www.research.att.com/orgs/ssr/book/reuse *
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* *
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* This software was created by the *
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* Software Engineering Research Department *
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* AT&T Bell Laboratories *
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* *
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* For further information contact *
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* gsf@research.att.com *
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* *
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***************************************************************/
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#include "sfhdr.h"
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/* Write a buffer out to a file descriptor or
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** extending a buffer for a SF_STRING stream.
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**
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** Written by Kiem-Phong Vo (06/27/90)
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*/
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#if __STD_C
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int _sfflsbuf(reg Sfio_t* f, reg int c)
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#else
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_sfflsbuf(f,c)
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reg Sfio_t *f; /* write out the buffered content of this stream */
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reg int c; /* if c>=0, c is also written out */
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#endif
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{
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reg int n, w;
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reg uchar *data;
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uchar outc;
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reg int local;
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int inpc = c;
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GETLOCAL(f,local);
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for(;; f->mode &= ~SF_LOCK)
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{ /* check stream mode */
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if(SFMODE(f,local) != SF_WRITE && _sfmode(f,SF_WRITE,local) < 0)
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return -1;
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SFLOCK(f,local);
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/* current data extent */
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n = f->next - (data = f->data);
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if(n == (f->endb-f->data) && (f->flags&SF_STRING))
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{ /* extend string stream buffer */
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(void)SFWR(f,data,1,f->disc);
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/* !(f->flags&SF_STRING) is required because exception
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handlers may turn a string stream to a file stream */
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if(f->next < f->endb || !(f->flags&SF_STRING) )
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n = f->next - (data = f->data);
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else
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{ SFOPEN(f,local);
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return -1;
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}
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}
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if(c >= 0)
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{ /* write into buffer */
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if(n < (f->endb - (data = f->data)))
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{ *f->next++ = c;
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if(c != '\n' ||
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!(f->flags&SF_LINE) || (f->flags&SF_STRING))
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break;
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c = -1;
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n += 1;
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}
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else if(n == 0)
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{ /* unbuffered io */
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outc = (uchar)c;
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data = &outc;
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c = -1;
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n = 1;
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}
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}
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/* writing data */
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if(n == 0 || (f->flags&SF_STRING))
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break;
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else if((w = SFWR(f,data,n,f->disc)) > 0)
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{ if((n -= w) > 0) /* save unwritten data, then resume */
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memcpy((char*)f->data,(char*)data+w,n);
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f->next = f->data+n;
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if(n == 0 && c < 0)
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break;
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}
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else if(w == 0)
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{ SFOPEN(f,local);
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return -1;
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}
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else if(c < 0)
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break;
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}
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SFOPEN(f,local);
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return inpc < 0 ? (f->endb-f->next) : inpc;
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}
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