expanded builtin atoi to handle $ and %

Author: totalspectrum

Changelog.txt

@@ -1,6 +1,7 @@
 Version 6.4.0
 - Added getcrc() builtin for Spin2
 - Added VFS layer for Parallax flash file system
+- Added recognition for "$" and "%" to __builtin_atoi
 - Changed littlefs to not return . and .. entries in path search (so it matches host fs and FATFS)
 - Fixed compilation error for object arrays in bytecode
 - Fixed some quirks in the space/tab warning code

sys/float.spin

@@ -233,7 +233,15 @@ pri __builtin_atoi(s = "0", base=0) : r = long | c, negate, digit
     if (c == "-")
       negate := 1 - negate
     c := byte[s]
-  
+
+  if base == 0
+    if c == "$"
+      base := 16
+      s++
+    elseif c == "%"
+      base := 2
+      s++
+
   repeat
     repeat
       c := byte[s++]