add printf

util/string.h65

@@ -11,7 +11,7 @@ INCLUDE_STRING = 1
 
 
 .scope str
-Import str, strf
+Import str, strf, printf_buffer
 Import str, hex_char_to_uint8, hex_str_to_uint
 Import str, uint8_to_hex_str, uint_to_hex_str
 
@@ -74,5 +74,10 @@ Import str, uint8_to_hex_str, uint_to_hex_str
     ; .out .sprintf("info: Strf: called with %d arguments", @N_ARGS)
 .endmacro
 
+.macro Printf fmt,x0,x1,x2,x3,x4,x5,x6,x7,x8,x9
+    Strf fmt,str::printf_buffer,x0,x1,x2,x3,x4,x5,x6,x7,x8,x9
+    PrintNC str::printf_buffer
+.endmacro
+
 .endscope
 .endif  ; guard

util/string.s65

@@ -1,5 +1,8 @@
 .include "string.h65"
-Export str, strf
+Export str, strf, printf_buffer
+
+.bss
+printf_buffer: .res $41
 
 .zeropage
 fmt_idx: .res 1