1#include "stdio_impl.h"
 2#include <string.h>
 3
 4static 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
18int 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
27weak_alias(vsscanf,__isoc99_vsscanf);