| 0,0 → 1,68 |
|---|
| /**************************************************************************** |
| * |
| * Open Watcom Project |
| * |
| * Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved. |
| * |
| * ======================================================================== |
| * |
| * This file contains Original Code and/or Modifications of Original |
| * Code as defined in and that are subject to the Sybase Open Watcom |
| * Public License version 1.0 (the 'License'). You may not use this file |
| * except in compliance with the License. BY USING THIS FILE YOU AGREE TO |
| * ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is |
| * provided with the Original Code and Modifications, and is also |
| * available at www.sybase.com/developer/opensource. |
| * |
| * The Original Code and all software distributed under the License are |
| * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
| * EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM |
| * ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR |
| * NON-INFRINGEMENT. Please see the License for the specific language |
| * governing rights and limitations under the License. |
| * |
| * ======================================================================== |
| * |
| * Description: Platform independent __ioalloc() implementation. |
| * |
| ****************************************************************************/ |
| |
| |
| #include "variety.h" |
| #include <stdio.h> |
| #include "liballoc.h" |
| #include <unistd.h> |
| #include "rtdata.h" |
| #include "streamio.h" |
| |
| |
| void __ioalloc( FILE *fp ) |
| { |
| __chktty( fp ); /* JBS 28-aug-90 */ |
| if( fp->_bufsize == 0 ) { |
| if( fp->_flag & _IOLBF ) { |
| fp->_bufsize = 134; |
| } else if( fp->_flag & _IONBF ) { |
| /* Use small but reasonably sized buffer; otherwise we will end |
| * up calling into the OS for every character, completely killing |
| * performance on unbuffered stream output through printf() etc., |
| * especially in extended DOS because of mode switches. |
| */ |
| fp->_bufsize = 64; |
| } else { |
| fp->_bufsize = BUFSIZ; |
| } |
| } |
| _FP_BASE(fp) = lib_malloc( fp->_bufsize ); |
| if( _FP_BASE(fp) == NULL ) { |
| fp->_flag &= ~(_IONBF | _IOLBF | _IOFBF); |
| fp->_flag |= _IONBF; /* can't get big buffer */ |
| _FP_BASE(fp) = (char *)&(fp->_ungotten); |
| fp->_bufsize = 1; |
| } else { |
| fp->_flag |= _BIGBUF; /* got big buffer */ |
| } |
| fp->_ptr = _FP_BASE(fp); |
| fp->_cnt = 0; |
| } |