96 lines
2.2 KiB
C
96 lines
2.2 KiB
C
/* Copyright 1996,1997,1999,2001,2002,2008,2009 Alain Knaff.
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* Copyright 2010 Volker Lanz (vl@fidra.de)
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* This file is part of mtools.
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*
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* Mtools is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Mtools is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Mtools. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "msdos.h"
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#include "stream.h"
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#include <stdlib.h>
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int flush_stream(struct Stream_t *Stream)
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{
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int ret = 0;
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if(Stream->Class->flush)
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ret |= Stream->Class->flush(Stream);
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if(Stream->Next)
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ret |= flush_stream(Stream->Next);
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return ret;
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}
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struct Stream_t *copy_stream(struct Stream_t *Stream)
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{
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if(Stream)
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Stream->refs++;
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return Stream;
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}
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int free_stream(struct Stream_t **Stream)
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{
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if(!*Stream)
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return -1;
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int ret = 0;
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if(! --(*Stream)->refs)
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{
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if((*Stream)->Class->flush)
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ret |= (*Stream)->Class->flush(*Stream);
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if((*Stream)->Class->freeFunc)
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ret |= (*Stream)->Class->freeFunc(*Stream);
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if((*Stream)->Next)
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ret |= free_stream(&(*Stream)->Next);
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free(*Stream);
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}
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else if ((*Stream)->Next)
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ret |= flush_stream((*Stream)->Next);
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*Stream = NULL;
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return ret;
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}
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#define GET_DATA(stream, date, size, type, address) \
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(stream)->Class->get_data( (stream), (date), (size), (type), (address) )
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int get_data_pass_through(struct Stream_t *Stream, time_t *date, size_t *size, int *type, int *address)
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{
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return GET_DATA(Stream->Next, date, size, type, address);
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}
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int read_pass_through(struct Stream_t *Stream, char *buf, off_t start, size_t len)
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{
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return READS(Stream->Next, buf, start, len);
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}
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int write_pass_through(struct Stream_t *Stream, char *buf, off_t start, size_t len)
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{
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return WRITES(Stream->Next, buf, start, len);
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}
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struct doscp_t *get_dosConvert_pass_through(struct Stream_t *Stream)
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{
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return GET_DOSCONVERT(Stream->Next);
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}
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