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#include "stdio_impl.h"
#include <string.h>
static size_t string_read(FILE *f, unsigned char *buf, size_t len)
{
char *src = f->cookie;
size_t k = len+256;
char *end = memchr(src, 0, k);
if (end) k = end-src;
if (k < len) len = k;
memcpy(buf, src, len);
f->rpos = (void *)(src+len);
f->rend = (void *)(src+k);
f->cookie = src+k;
return len;
}
int vsscanf(const char *restrict s, const char *restrict fmt, va_list ap)
{
FILE f = {
.buf = (void *)s, .cookie = (void *)s,
.read = string_read, .lock = -1
};
return vfscanf(&f, fmt, ap);
}
weak_alias(vsscanf,__isoc99_vsscanf);
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