dns response handling: ignore presence of wrong-type RRs
[musl] / src / multibyte / wcrtomb.c
1 #include <stdlib.h>
2 #include <wchar.h>
3 #include <errno.h>
4 #include "internal.h"
5
6 size_t wcrtomb(char *restrict s, wchar_t wc, mbstate_t *restrict st)
7 {
8         if (!s) return 1;
9         if ((unsigned)wc < 0x80) {
10                 *s = wc;
11                 return 1;
12         } else if (MB_CUR_MAX == 1) {
13                 if (!IS_CODEUNIT(wc)) {
14                         errno = EILSEQ;
15                         return -1;
16                 }
17                 *s = wc;
18                 return 1;
19         } else if ((unsigned)wc < 0x800) {
20                 *s++ = 0xc0 | (wc>>6);
21                 *s = 0x80 | (wc&0x3f);
22                 return 2;
23         } else if ((unsigned)wc < 0xd800 || (unsigned)wc-0xe000 < 0x2000) {
24                 *s++ = 0xe0 | (wc>>12);
25                 *s++ = 0x80 | ((wc>>6)&0x3f);
26                 *s = 0x80 | (wc&0x3f);
27                 return 3;
28         } else if ((unsigned)wc-0x10000 < 0x100000) {
29                 *s++ = 0xf0 | (wc>>18);
30                 *s++ = 0x80 | ((wc>>12)&0x3f);
31                 *s++ = 0x80 | ((wc>>6)&0x3f);
32                 *s = 0x80 | (wc&0x3f);
33                 return 4;
34         }
35         errno = EILSEQ;
36         return -1;
37 }