| #include <wchar.h> |
| #include <limits.h> |
| #include <string.h> |
| |
| size_t wcsnrtombs(char* restrict dst, const wchar_t** restrict wcs, size_t wn, size_t n, |
| mbstate_t* restrict st) { |
| const wchar_t* ws = *wcs; |
| size_t cnt = 0; |
| if (!dst) n=0; |
| while (ws && wn) { |
| char tmp[MB_LEN_MAX]; |
| size_t l = wcrtomb(n<MB_LEN_MAX ? tmp : dst, *ws, 0); |
| if (l==-1) { |
| cnt = -1; |
| break; |
| } |
| if (dst) { |
| if (n<MB_LEN_MAX) { |
| if (l>n) break; |
| memcpy(dst, tmp, l); |
| } |
| dst += l; |
| n -= l; |
| } |
| if (!*ws) { |
| ws = 0; |
| break; |
| } |
| ws++; |
| wn--; |
| cnt += l; |
| } |
| if (dst) |
| *wcs = ws; |
| return cnt; |
| } |
