source: trunk/minix/commands/i386/mtools-3.9.7/stream.c@ 10

#include "sysincludes.h"
#include "msdos.h"
#include "stream.h"

int batchmode = 0;

int flush_stream(Stream_t *Stream)
{
        int ret=0;
        if(!batchmode) {
                if(Stream->Class->flush)
                        ret |= Stream->Class->flush(Stream);
                if(Stream->Next)
                        ret |= flush_stream(Stream->Next);
        }
        return ret;
}

Stream_t *copy_stream(Stream_t *Stream)
{
        if(Stream)
                Stream->refs++;
        return Stream;
}

int free_stream(Stream_t **Stream)
{
        int ret=0;

        if(!*Stream)
                return -1;
        if(! --(*Stream)->refs){
                if((*Stream)->Class->flush)
                        ret |= (*Stream)->Class->flush(*Stream);
                if((*Stream)->Class->freeFunc)
                        ret |= (*Stream)->Class->freeFunc(*Stream);
                if((*Stream)->Next)
                        ret |= free_stream(&(*Stream)->Next);
                Free(*Stream);
        } else if ( (*Stream)->Next )
                ret |= flush_stream((*Stream)->Next);           
        *Stream = NULL;
        return ret;
}


#define GET_DATA(stream, date, size, type, address) \
(stream)->Class->get_data( (stream), (date), (size), (type), (address) )


int get_data_pass_through(Stream_t *Stream, time_t *date, mt_size_t *size,
                          int *type, int *address)
{
       return GET_DATA(Stream->Next, date, size, type, address);
}

int read_pass_through(Stream_t *Stream, char *buf, mt_off_t start, size_t len)
{
        return READS(Stream->Next, buf, start, len);
}

int write_pass_through(Stream_t *Stream, char *buf, mt_off_t start, size_t len)
{
        return WRITES(Stream->Next, buf, start, len);
}