int __cdecl _fseek_nolock (
FILE *str,
long offset,
int whence
)
{
REG1 FILE *stream;
/* Init stream pointer */
stream = str;
if ( !inuse(stream)) {
errno=EINVAL;
return(-1);
}
/* Clear EOF flag */
stream->_flag &= ~_IOEOF;
/* If seeking relative to current location, then convert to
a seek relative to beginning of file. This accounts for
buffering, etc. by letting fseek() tell us where we are. */
if (whence == SEEK_CUR) {
offset += _ftell_nolock(stream);
whence = SEEK_SET;
}
/* Flush buffer as necessary */
_flush(stream);
/* If file opened for read/write, clear flags since we don't know
what the user is going to do next. If the file was opened for
read access only, decrease _bufsiz so that the next _filbuf
won't cost quite so much */
if (stream->_flag & _IORW)
stream->_flag &= ~(_IOWRT|_IOREAD);
else if ( (stream->_flag & _IOREAD) && (stream->_flag & _IOMYBUF) &&
!(stream->_flag & _IOSETVBUF) )
stream->_bufsiz = _SMALL_BUFSIZ;
/* Seek to the desired locale and return. */
return(_lseek(_fileno(stream), offset, whence) == -1L ? -1 : 0);
}
long __cdecl ftell(
FILE* stream
) {
long retval;
_VALIDATE_RETURN((stream != NULL), EINVAL, (-1L));
_lock_str(stream);
__try {
retval = _ftell_nolock(stream);
} __finally {
_unlock_str(stream);
}
return (retval);
}
