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/*
* Force I/O to be done to complete transfer length
*
* written by:
*
* Alain L. Knaff
* Alain.Knaff@poboxes.com
*
*/
#include "sysincludes.h"
#include "msdos.h"
#include "stream.h"
static int force_io(Stream_t *Stream,
char *buf, off_t start, size_t len,
int (*io)(Stream_t *, char *, off_t, size_t))
{
int ret;
int done=0;
while(len){
ret = io(Stream, buf, start, len);
if ( ret <= 0 ){
if (done)
return done;
else
return ret;
}
start += ret;
done += ret;
len -= ret;
buf += ret;
}
return done;
}
int force_write(Stream_t *Stream, char *buf, off_t start, size_t len)
{
return force_io(Stream, buf, start, len,
Stream->Class->write);
}
int force_read(Stream_t *Stream, char *buf, off_t start, size_t len)
{
return force_io(Stream, buf, start, len,
Stream->Class->read);
}
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