X-Git-Url: http://git.ozlabs.org/?a=blobdiff_plain;f=ccan%2Fopt%2Fhelpers.c;h=747a78e9139b875e7f7f6620d194510418c2c300;hb=23636f5911d564fb3a74a49d122a5270d82aaa88;hp=2c771bc3309062aa7cfea03423f719128f3c9686;hpb=79715b8c08446fe5e74d2ab9e9db00175169eab3;p=ccan

diff --git a/ccan/opt/helpers.c b/ccan/opt/helpers.c
index 2c771bc3..747a78e9 100644
--- a/ccan/opt/helpers.c
+++ b/ccan/opt/helpers.c
@@ -116,6 +116,49 @@ char *opt_set_ulongval(const char *arg, unsigned long *ul)
 	return NULL;
 }
 
+char *opt_set_floatval(const char *arg, float *f)
+{
+	double d;
+	char *err;
+
+	err = opt_set_doubleval(arg, &d);
+	if (err)
+		return err;
+
+	*f = d;
+	if (*f != d)
+		return arg_bad("'%s' is out of range", arg);
+
+	return NULL;
+}
+
+void opt_show_floatval(char buf[OPT_SHOW_LEN], const float *f)
+{
+	double d = *f;
+	opt_show_doubleval(buf, &d);
+}
+
+char *opt_set_doubleval(const char *arg, double *d)
+{
+	char *endp;
+
+	/* This is how the manpage says to do it.  Yech. */
+	errno = 0;
+	/* Don't assume strtof */
+	*d = strtod(arg, &endp);
+	if (*endp || !arg[0])
+		return arg_bad("'%s' is not a number", arg);
+	if (errno)
+		return arg_bad("'%s' is out of range", arg);
+
+	return NULL;
+}
+
+void opt_show_doubleval(char buf[OPT_SHOW_LEN], const double *d)
+{
+	snprintf(buf, OPT_SHOW_LEN, "%f", *d);
+}
+
 char *opt_inc_intval(int *i)
 {
 	(*i)++;