+#include "shgetc.h"
+#include "floatscan.h"
+#include "stdio_impl.h"
+
+static long double strtox(const char *s, char **p, int prec)
+{
+ FILE f = {
+ .buf = (void *)s, .rpos = (void *)s,
+ .rend = (void *)-1, .lock = -1
+ };
+ shlim(&f, 0);
+ long double y = __floatscan(&f, prec, 1);
+ off_t cnt = shcnt(&f);
+ if (p) *p = cnt ? (char *)s + cnt : (char *)s;
+ return y;
+}
+
+float strtof(const char *s, char **p)
+{
+ return strtox(s, p, 0);
+}