braindead f32FromString

math.c

@@ -146,3 +146,20 @@ fn u64 u64SafeMul(u64 x, u64 y) {
   return x * y;
 }
 
+fn f32 f32FromString(String s) {
+  f32 result = 0.0f;
+  if (s.length == 0) { return result; }
+  ptr c = s.bytes;
+  while (*c >= '0' && *c <= '9') {
+    result = result * 10.0f + (*c++ - '0');
+  }
+  if (*c == '.') {
+    c++;
+    f32 frac = 0.1f;
+    while (*c >= '0' && *c <= '9') {
+      result += (*c++ - '0') * frac;
+      frac *= 0.1f;
+    }
+  }
+  return result;
+}