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Diffstat (limited to 'src/stdlib/strtod.c')
-rw-r--r--src/stdlib/strtod.c30
1 files changed, 29 insertions, 1 deletions
diff --git a/src/stdlib/strtod.c b/src/stdlib/strtod.c
index 388058fe..ecfabdf1 100644
--- a/src/stdlib/strtod.c
+++ b/src/stdlib/strtod.c
@@ -1,6 +1,34 @@
#include <stdlib.h>
+#include "shgetc.h"
+#include "floatscan.h"
+#include "stdio_impl.h"
+
+static long double strtox(const char *s, char **p, int prec)
+{
+ char *t = (char *)s;
+ while (isspace(*t)) t++;
+ FILE f = {
+ .buf = (void *)t, .rpos = (void *)t,
+ .rend = (void *)-1, .lock = -1
+ };
+ shlim(&f, 0);
+ long double y = __floatscan(&f, -1, prec, 1);
+ off_t cnt = shcnt(&f);
+ if (p) *p = cnt ? t + cnt : (char *)s;
+ return y;
+}
+
+float strtof(const char *s, char **p)
+{
+ return strtox(s, p, 0);
+}
double strtod(const char *s, char **p)
{
- return strtold(s, p);
+ return strtox(s, p, 1);
+}
+
+long double strtold(const char *s, char **p)
+{
+ return strtox(s, p, 2);
}