| 1 | #include "stdio_impl.h" |
| 2 | #include <string.h> |
| 3 | |
| 4 | static size_t string_read(FILE *f, unsigned char *buf, size_t len) |
| 5 | { |
| 6 | char *src = f->cookie; |
| 7 | size_t k = len+256; |
| 8 | char *end = memchr(src, 0, k); |
| 9 | if (end) k = end-src; |
| 10 | if (k < len) len = k; |
| 11 | memcpy(buf, src, len); |
| 12 | f->rpos = (void *)(src+len); |
| 13 | f->rend = (void *)(src+k); |
| 14 | f->cookie = src+k; |
| 15 | return len; |
| 16 | } |
| 17 | |
| 18 | int vsscanf(const char *restrict s, const char *restrict fmt, va_list ap) |
| 19 | { |
| 20 | FILE f = { |
| 21 | .buf = (void *)s, .cookie = (void *)s, |
| 22 | .read = string_read, .lock = -1 |
| 23 | }; |
| 24 | return vfscanf(&f, fmt, ap); |
| 25 | } |
| 26 | |
| 27 | weak_alias(vsscanf,__isoc99_vsscanf); |