1 files changed, 30 insertions, 0 deletions
diff --git a/src/stdlib/strtod.c b/src/stdlib/strtod.c
new file mode 100644
index 0000000..39b9daa
--- /dev/null
+++ b/src/stdlib/strtod.c
@@ -0,0 +1,30 @@
+#include <stdlib.h>
+#include "shgetc.h"
+#include "floatscan.h"
+#include "stdio_impl.h"
+
+static long double strtox(const char *s, char **p, int prec)
+{
+	FILE f;
+	sh_fromstring(&f, s);
+	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 *restrict s, char **restrict p)
+{
+	return strtox(s, p, 0);
+}
+
+double strtod(const char *restrict s, char **restrict p)
+{
+	return strtox(s, p, 1);
+}
+
+long double strtold(const char *restrict s, char **restrict p)
+{
+	return strtox(s, p, 2);
+}