1#include "stdio_impl.h"
2
3/* This function makes no attempt to protect the user from his/her own
4 * stupidity. If called any time but when then ISO C standard specifically
5 * allows it, all hell can and will break loose, especially with threads!
6 *
7 * This implementation ignores all arguments except the buffering type,
8 * and uses the existing buffer allocated alongside the FILE object.
9 * In the case of stderr where the preexisting buffer is length 1, it
10 * is not possible to set line buffering or full buffering. */
11
12int setvbuf(FILE* restrict f, char* restrict buf, int type, size_t size) {
13    f->lbf = EOF;
14
15    if (type == _IONBF)
16        f->buf_size = 0;
17    else if (type == _IOLBF)
18        f->lbf = '\n';
19
20    f->flags |= F_SVB;
21
22    return 0;
23}
24