diff --git a/crossfire/codegen.rkt b/crossfire/codegen.rkt
index bd7c53f..4aa6e70 100644
--- a/crossfire/codegen.rkt
+++ b/crossfire/codegen.rkt
@@ -41,10 +41,8 @@
 
 ;; ok gamer move time
 (define-runtime-path codegen-template "codegen.rktc")
-(define (pattern-codegen pattern mode pp-start pp-end)
+(define (pattern-codegen pattern mode)
   (eval-template
     `(file ,(path->string codegen-template))
     (hash 'pattern (vector-map integer-set-contents pattern)
-          'mode mode
-          'pp-start pp-start
-          'pp-end pp-end)))
+          'mode mode)))
diff --git a/crossfire/codegen.rktc b/crossfire/codegen.rktc
index 144de2a..4f66c2f 100644
--- a/crossfire/codegen.rktc
+++ b/crossfire/codegen.rktc
@@ -23,6 +23,7 @@
 #include <stdint.h>
 #include <stdbool.h>
 
+@;; TODO : make configurable
 @(define c-type "uint64_t")
 @(define c-type-fmt "%lx")
 
@@ -52,12 +53,28 @@ typedef struct {
 @(for/list ([i (in-naturals)] [iset (in-vector pattern)])
   (output-iset i iset))
 
-int crossfire_main(callback cb) {
+int crossfire_main(int argc, char* argv[], callback cb) {
     char buf [ @(* 20 (vector-length pattern)) ];
-    // @format["~s" pp-start]
-    @(for/list ([num (in-naturals)] [iset-pos (in-vector pp-start)])
-      @list{size_t @(format "i~a" num) = @(car iset-pos) ;
-            vartype @(format "v~a" num) = @(cdr iset-pos) ;
+
+    @(define req-args (add1 (* (vector-length pattern) 4)))
+    if (argc < @req-args) {
+        fprintf(stderr, "missing args\n");
+        return -1;
+    }
+
+    @(for/list ([num (in-range (vector-length pattern))])
+      (define iter-s (format "i~a" num))
+      (define viter-s (format "v~a" num))
+      (define iter-e (format "i~a_e" num))
+      (define viter-e (format "v~a_e" num))
+      @list{size_t @iter-s ;
+            sscanf(argv[1 + @num * 4], "%zx", &@iter-s );
+            vartype @viter-s ;
+            sscanf(argv[1 + @num * 4 + 1], @(format "\"~a\"" c-type-fmt) , &@viter-s );
+            size_t @iter-e ;
+            sscanf(argv[1 + @num * 4 + 2], "%zx", &@iter-e );
+            vartype @viter-e ;
+            sscanf(argv[1 + @num * 4 + 3], @(format "\"~a\"" c-type-fmt) , &@viter-e );
 
       })
     ssize_t res;
@@ -85,11 +102,13 @@ l_inner:
 
     @(define (end-conditionals)
       (add-between
-        (for/list ([num (in-naturals)] [iset-pos (in-vector pp-end)])
+        (for/list ([num (in-range (vector-length pattern))])
           (define iter (format "i~a" num))
           (define viter (format "v~a" num))
+          (define iter-e (format "i~a_e" num))
+          (define viter-e (format "v~a_e" num))
           @; ranges are inclusive, but since we exit _after_ printing/callbacking we use >=
-          @list{ @iter >= @(car iset-pos) && @viter >= @(cdr iset-pos) })
+          @list{ @iter >= @iter-e && @viter >= @viter-e })
         " && "))
 
     @(match mode
@@ -99,7 +118,6 @@ l_inner:
       ['callback
        @list{ if (cb( @vs )) { cf_report_success( @vs ); return 0; } }])
 
-    // @format["~s" pp-end]
     if ( @end-conditionals[] ) {
         goto l_end;
     }
@@ -112,8 +130,8 @@ l_end:
 
 @(if (equal? mode 'stdio)
   @list{
-int main() {
-    return crossfire_main(NULL);
+int main(int argc, char* argv[]) {
+    return crossfire_main(argc, argv, NULL);
 }
   }
   @list{
diff --git a/crossfire/main.rkt b/crossfire/main.rkt
index d2b8832..7cf2042 100644
--- a/crossfire/main.rkt
+++ b/crossfire/main.rkt
@@ -109,7 +109,12 @@
       ;; brute force pattern
       (pattern ?m "_?d"))))
 
-(pattern-codegen pattern mode (resolve-pattern-pos pattern (pos->pattern-pos pattern 10))
-                 (resolve-pattern-pos pattern
-                                      (pos->pattern-pos pattern 21)))
+(pattern-codegen pattern mode)
+(define start (resolve-pattern-pos pattern (pos->pattern-pos pattern 10)))
+(define end (resolve-pattern-pos pattern (pos->pattern-pos pattern 21)))
+(printf "// args: ")
+(for ([s (in-vector start)] [e (in-vector end)])
+  (apply printf "~a ~a ~a ~a "
+         (map (lambda (x) (number->string x 16)) (list (car s) (cdr s) (car e) (cdr e)))))
+(printf "\n")
 (printf "// total: ~a\n" (pattern-count pattern))