int fflush(FILE *fp) {
int flush;
if (!fp->flags._WRITE || fp->flags._ERR || fp->flags._EOF)
return EOF;
flush = _flushbuf(0, fp);
fp->ptr = fp->base;
fp->cnt = (fp->flags._UNBUF ? 1 : BUFSIZ);
return flush;
}
int fflush_x(FILEX *fp) {
int rc = 0;
if (fp->pflag.write == 1 && (rc = _flushbuf(0, fp)) == EOF) {
return EOF;
}
fp->ptr = fp->base;
fp->cnt = fp->pflag.unbuf == 1 ? 1 : BUFSIZ;
return rc;
}
int fflush(FILE *fp) {
int rc = 0;
// Make sure we are being asked to flush a valid file pointer
if (fp < _iob || fp >= _iob + OPEN_MAX)
return EOF;
if (fp->flag & _WRITE)
rc = _flushbuf(0, fp);
fp->ptr = fp->base;
fp->cnt = (fp->flag & _UNBUF) ? 1 : BUFSIZ;
return rc;
}
// returns 0 if successful, else EOF
int fflush(FILE *fp)
{
int val;
// check for valid fp
if (fp < _iob || fp >= _iob + OPEN_MAX) { // not valid file pointer
return EOF;
}
// if it was to write then flush (write buffer to file, and reset ptr of buffer to beginning)
if (fp->flags & _WRITE) {
val = _flushbuf(0, fp);
}
fp->ptr = fp->base;
fp->cnt = (fp->flag & _UNBUF) ? 1 : BUFSIZ;
return val;
}
int fflush(FILE *fp)
{
int rc = 0;
if (fp < _iob || fp >= _iob + OPEN_MAX) {
return EOF; /* invalid pointer */
}
if (fp->write & _WRITE) {
rc = _flushbuf(0, fp);
}
fp->ptr = fp->base;
fp->cnt = (fp->flag & _UNBUF) ? 1 : BUFSIZ;
return rc;
}
/* fflush */
int fflush(FILE *f)
{
int retval;
int i;
retval = 0;
if (f == NULL) {
/* flush all output streams */
for (i = 0; i < OPEN_MAX; i++) {
if ((_iob[i]->flag & _WRITE) && (fflush(_iob[i]) == -1))
retval = -1;
}
} else {
if ((f->flag & _WRITE) == 0)
return -1;
_flushbuf(EOF, f);
if (f->flag & _ERR)
retval = -1;
}
return retval;
}
