hackish_atof_fix.patch

hackish_atof_fix.patch

diff --git a/ui.c b/ui.c
index 27519aa..d265d74 100644
--- a/ui.c
+++ b/ui.c
@@ -24,6 +24,7 @@
 #include "nanovna.h"
 #include <stdlib.h>
 #include <string.h>
+#include <ctype.h>
 
 
 uistat_t uistat = {
@@ -1678,6 +1679,42 @@ static void ui_process_menu(void)
   }
 }
 
+static inline double my_atod(const char *p)
+{
+  int neg = FALSE;
+  if (*p == '-')
+    neg = TRUE;
+  if (*p == '-' || *p == '+')
+    p++;
+  double x = atoi(p);
+  while (isdigit((int)*p))
+    p++;
+  if (*p == '.') {
+    double d = 1.0f;
+    p++;
+    while (isdigit((int)*p)) {
+      d /= 10;
+      x += d * (*p - '0');
+      p++;
+    }
+  }
+  if (*p == 'e' || *p == 'E') {
+    p++;
+    int exp = atoi(p);
+    while (exp > 0) {
+      x *= 10;
+      exp--;
+    }
+    while (exp < 0) {
+      x /= 10;
+      exp++;
+    }
+  }
+  if (neg)
+    x = -x;
+  return x;
+}
+
 static int keypad_click(int key) 
 {
   int c = keypads[key].c;
@@ -1691,7 +1728,7 @@ static int keypad_click(int key)
       scale *= 1000;
     }
     /* numeric input done */
-    double value = atof(kp_buf) * scale;
+    double value = my_atod(kp_buf) * scale;
     switch (keypad_mode) {
     case KM_START:
       set_sweep_frequency(ST_START, (int32_t)value);