1 #include "stdio_impl.h"
2 #include <string.h>
3
string_read(FILE * f,unsigned char * buf,size_t len)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
vsscanf(const char * restrict s,const char * restrict fmt,va_list ap)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);
28