diff --git a/README.md b/README.md
index 3c8e4f8..4c86b9e 100644
--- a/README.md
+++ b/README.md
@@ -218,7 +218,16 @@ function is called
 
 ## User Defined Argument History
 
-Coming soon!
+If you wish to control how many calls to capture for argument history you can
+overide the default by defining it before include the <tt>fff.h</tt> like this:
+
+    // Want to keep the argument history for 13 calls
+    #define FFF_ARG_HISTORY_LEN 13
+    // Want to keep the call sequence history for 17 function calls
+    #define FFF_CALL_HISTORY_LEN 17
+    
+    #include "../fff.h"
+
 
 ## Function Return Value Sequences
 
diff --git a/buildandtest b/buildandtest
new file mode 100755
index 0000000..85fb419
--- /dev/null
+++ b/buildandtest
@@ -0,0 +1,3 @@
+#!/bin/sh
+ruby fakegen.rb > fff.h && make clean && make all && build/fff_test_c && build/fff_test_cpp
+
diff --git a/fakegen.rb b/fakegen.rb
index d954e03..e140cb3 100644
--- a/fakegen.rb
+++ b/fakegen.rb
@@ -9,9 +9,13 @@ $DEFAULT_ARG_HISTORY = 50
 $MAX_CALL_HISTORY = 50
 
 def output_constants
-  puts "#define FFF_MAX_ARGS ((unsigned)#{$MAX_ARGS})"
-  puts "#define FFF_ARG_HISTORY_LEN ((unsigned)#{$DEFAULT_ARG_HISTORY})"
-  puts "#define FFF_CALL_HISTORY_LEN ((unsigned)#{$MAX_CALL_HISTORY})"
+  puts "#define FFF_MAX_ARGS (#{$MAX_ARGS}u)"
+  puts "#ifndef FFF_ARG_HISTORY_LEN"
+  puts "    #define FFF_ARG_HISTORY_LEN (#{$DEFAULT_ARG_HISTORY}u)"
+  puts "#endif"
+  puts "#ifndef FFF_CALL_HISTORY_LEN"
+  puts "  #define FFF_CALL_HISTORY_LEN (#{$MAX_CALL_HISTORY}u)"
+  puts "#endif"
 end
 
 def output_macro(args, is_value_function)
@@ -96,7 +100,7 @@ def output_argument_capture_variables(i)
   # last argument
   puts "    static ARG#{i}_TYPE FUNCNAME##_arg#{i}_val; \\"
   # argument history array
-  puts "    static ARG#{i}_TYPE FUNCNAME##_arg#{i}_history[#{$DEFAULT_ARG_HISTORY}];\\"
+  puts "    static ARG#{i}_TYPE FUNCNAME##_arg#{i}_history[FFF_ARG_HISTORY_LEN];\\"
 end
 
 def output_variables(arg_count, is_value_function)
@@ -106,7 +110,7 @@ def output_variables(arg_count, is_value_function)
   puts "    static int FUNCNAME##_return_val_seq_idx = 0; \\" unless not is_value_function
   puts "    static RETURN_TYPE * FUNCNAME##_return_val_seq = 0; \\" unless not is_value_function
   puts "    static unsigned int FUNCNAME##_call_count = 0; \\"
-  puts "    static unsigned int FUNCNAME##_arg_history_len = #{$DEFAULT_ARG_HISTORY};\\"
+  puts "    static unsigned int FUNCNAME##_arg_history_len = FFF_ARG_HISTORY_LEN;\\"
   puts "    static unsigned int FUNCNAME##_arg_histories_dropped = 0; \\"
 end
 
@@ -186,15 +190,14 @@ def define_reset_fake
 end
 
 def define_call_history
-  puts "#define MAX_CALL_HISTORY #{$MAX_CALL_HISTORY}u"
-  puts "static void * call_history[MAX_CALL_HISTORY];"
+  puts "static void * call_history[FFF_CALL_HISTORY_LEN];"
   puts "static unsigned int call_history_idx;"
   puts "static void RESET_HISTORY() { "
   puts "    call_history_idx = 0; "
   puts "}"
 
   puts "#define REGISTER_CALL(function) \\"
-  puts "   if(call_history_idx < MAX_CALL_HISTORY) call_history[call_history_idx++] = (void *)function;"
+  puts "   if(call_history_idx < FFF_CALL_HISTORY_LEN) call_history[call_history_idx++] = (void *)function;"
 end
 
 def define_return_sequence
@@ -243,6 +246,6 @@ output_c_and_cpp{
   define_return_sequence
   output_cpp_reset_code if $cpp_output
   output_cpp_static_initializer if $cpp_output
-  10.times {|arg_count| output_macro(arg_count, false)}
-  10.times {|arg_count| output_macro(arg_count, true)}
+  $MAX_ARGS.times {|arg_count| output_macro(arg_count, false)}
+  $MAX_ARGS.times {|arg_count| output_macro(arg_count, true)}
 }
\ No newline at end of file
diff --git a/fff.h b/fff.h
index bd91ce7..9e7e7d9 100644
--- a/fff.h
+++ b/fff.h
@@ -2,23 +2,26 @@
 #define FAKE_FUNCTIONS
 
 #ifdef __cplusplus
-#define FFF_MAX_ARGS ((unsigned)10)
-#define FFF_ARG_HISTORY_LEN ((unsigned)50)
-#define FFF_CALL_HISTORY_LEN ((unsigned)50)
+#define FFF_MAX_ARGS (10u)
+#ifndef FFF_ARG_HISTORY_LEN
+    #define FFF_ARG_HISTORY_LEN (50u)
+#endif
+#ifndef FFF_CALL_HISTORY_LEN
+  #define FFF_CALL_HISTORY_LEN (50u)
+#endif
 
 /* Defining a function to reset a fake function */
 #define RESET_FAKE(FUNCNAME) { \
     FUNCNAME##_reset(); \
 } \
 
-#define MAX_CALL_HISTORY 50u
-static void * call_history[MAX_CALL_HISTORY];
+static void * call_history[FFF_CALL_HISTORY_LEN];
 static unsigned int call_history_idx;
 static void RESET_HISTORY() { 
     call_history_idx = 0; 
 }
 #define REGISTER_CALL(function) \
-   if(call_history_idx < MAX_CALL_HISTORY) call_history[call_history_idx++] = (void *)function;
+   if(call_history_idx < FFF_CALL_HISTORY_LEN) call_history[call_history_idx++] = (void *)function;
 #define SET_RETURN_SEQ( FUNCNAME, ARRAY_POINTER, ARRAY_LEN) \
                         FUNCNAME##_return_val_seq = ARRAY_POINTER; \
                         FUNCNAME##_return_val_seq_len = ARRAY_LEN;
@@ -51,7 +54,7 @@ static StaticInitializer_##FUNCNAME staticInitializer_##FUNCNAME; \
 #define FAKE_VOID_FUNC0(FUNCNAME) \
 extern "C"{ \
     static unsigned int FUNCNAME##_call_count = 0; \
-    static unsigned int FUNCNAME##_arg_history_len = 50;\
+    static unsigned int FUNCNAME##_arg_history_len = FFF_ARG_HISTORY_LEN;\
     static unsigned int FUNCNAME##_arg_histories_dropped = 0; \
     void FUNCNAME(){ \
         if(FUNCNAME##_call_count >= FUNCNAME##_arg_history_len){\
@@ -71,9 +74,9 @@ STATIC_INIT(FUNCNAME) \
 #define FAKE_VOID_FUNC1(FUNCNAME, ARG0_TYPE) \
 extern "C"{ \
     static ARG0_TYPE FUNCNAME##_arg0_val; \
-    static ARG0_TYPE FUNCNAME##_arg0_history[50];\
+    static ARG0_TYPE FUNCNAME##_arg0_history[FFF_ARG_HISTORY_LEN];\
     static unsigned int FUNCNAME##_call_count = 0; \
-    static unsigned int FUNCNAME##_arg_history_len = 50;\
+    static unsigned int FUNCNAME##_arg_history_len = FFF_ARG_HISTORY_LEN;\
     static unsigned int FUNCNAME##_arg_histories_dropped = 0; \
     void FUNCNAME(ARG0_TYPE arg0){ \
         FUNCNAME##_arg0_val = arg0; \
@@ -99,11 +102,11 @@ STATIC_INIT(FUNCNAME) \
 #define FAKE_VOID_FUNC2(FUNCNAME, ARG0_TYPE, ARG1_TYPE) \
 extern "C"{ \
     static ARG0_TYPE FUNCNAME##_arg0_val; \
-    static ARG0_TYPE FUNCNAME##_arg0_history[50];\
+    static ARG0_TYPE FUNCNAME##_arg0_history[FFF_ARG_HISTORY_LEN];\
     static ARG1_TYPE FUNCNAME##_arg1_val; \
-    static ARG1_TYPE FUNCNAME##_arg1_history[50];\
+    static ARG1_TYPE FUNCNAME##_arg1_history[FFF_ARG_HISTORY_LEN];\
     static unsigned int FUNCNAME##_call_count = 0; \
-    static unsigned int FUNCNAME##_arg_history_len = 50;\
+    static unsigned int FUNCNAME##_arg_history_len = FFF_ARG_HISTORY_LEN;\
     static unsigned int FUNCNAME##_arg_histories_dropped = 0; \
     void FUNCNAME(ARG0_TYPE arg0, ARG1_TYPE arg1){ \
         FUNCNAME##_arg0_val = arg0; \
@@ -135,13 +138,13 @@ STATIC_INIT(FUNCNAME) \
 #define FAKE_VOID_FUNC3(FUNCNAME, ARG0_TYPE, ARG1_TYPE, ARG2_TYPE) \
 extern "C"{ \
     static ARG0_TYPE FUNCNAME##_arg0_val; \
-    static ARG0_TYPE FUNCNAME##_arg0_history[50];\
+    static ARG0_TYPE FUNCNAME##_arg0_history[FFF_ARG_HISTORY_LEN];\
     static ARG1_TYPE FUNCNAME##_arg1_val; \
-    static ARG1_TYPE FUNCNAME##_arg1_history[50];\
+    static ARG1_TYPE FUNCNAME##_arg1_history[FFF_ARG_HISTORY_LEN];\
     static ARG2_TYPE FUNCNAME##_arg2_val; \
-    static ARG2_TYPE FUNCNAME##_arg2_history[50];\
+    static ARG2_TYPE FUNCNAME##_arg2_history[FFF_ARG_HISTORY_LEN];\
     static unsigned int FUNCNAME##_call_count = 0; \
-    static unsigned int FUNCNAME##_arg_history_len = 50;\
+    static unsigned int FUNCNAME##_arg_history_len = FFF_ARG_HISTORY_LEN;\
     static unsigned int FUNCNAME##_arg_histories_dropped = 0; \
     void FUNCNAME(ARG0_TYPE arg0, ARG1_TYPE arg1, ARG2_TYPE arg2){ \
         FUNCNAME##_arg0_val = arg0; \
@@ -179,15 +182,15 @@ STATIC_INIT(FUNCNAME) \
 #define FAKE_VOID_FUNC4(FUNCNAME, ARG0_TYPE, ARG1_TYPE, ARG2_TYPE, ARG3_TYPE) \
 extern "C"{ \
     static ARG0_TYPE FUNCNAME##_arg0_val; \
-    static ARG0_TYPE FUNCNAME##_arg0_history[50];\
+    static ARG0_TYPE FUNCNAME##_arg0_history[FFF_ARG_HISTORY_LEN];\
     static ARG1_TYPE FUNCNAME##_arg1_val; \
-    static ARG1_TYPE FUNCNAME##_arg1_history[50];\
+    static ARG1_TYPE FUNCNAME##_arg1_history[FFF_ARG_HISTORY_LEN];\
     static ARG2_TYPE FUNCNAME##_arg2_val; \
-    static ARG2_TYPE FUNCNAME##_arg2_history[50];\
+    static ARG2_TYPE FUNCNAME##_arg2_history[FFF_ARG_HISTORY_LEN];\
     static ARG3_TYPE FUNCNAME##_arg3_val; \
-    static ARG3_TYPE FUNCNAME##_arg3_history[50];\
+    static ARG3_TYPE FUNCNAME##_arg3_history[FFF_ARG_HISTORY_LEN];\
     static unsigned int FUNCNAME##_call_count = 0; \
-    static unsigned int FUNCNAME##_arg_history_len = 50;\
+    static unsigned int FUNCNAME##_arg_history_len = FFF_ARG_HISTORY_LEN;\
     static unsigned int FUNCNAME##_arg_histories_dropped = 0; \
     void FUNCNAME(ARG0_TYPE arg0, ARG1_TYPE arg1, ARG2_TYPE arg2, ARG3_TYPE arg3){ \
         FUNCNAME##_arg0_val = arg0; \
@@ -231,17 +234,17 @@ STATIC_INIT(FUNCNAME) \
 #define FAKE_VOID_FUNC5(FUNCNAME, ARG0_TYPE, ARG1_TYPE, ARG2_TYPE, ARG3_TYPE, ARG4_TYPE) \
 extern "C"{ \
     static ARG0_TYPE FUNCNAME##_arg0_val; \
-    static ARG0_TYPE FUNCNAME##_arg0_history[50];\
+    static ARG0_TYPE FUNCNAME##_arg0_history[FFF_ARG_HISTORY_LEN];\
     static ARG1_TYPE FUNCNAME##_arg1_val; \
-    static ARG1_TYPE FUNCNAME##_arg1_history[50];\
+    static ARG1_TYPE FUNCNAME##_arg1_history[FFF_ARG_HISTORY_LEN];\
     static ARG2_TYPE FUNCNAME##_arg2_val; \
-    static ARG2_TYPE FUNCNAME##_arg2_history[50];\
+    static ARG2_TYPE FUNCNAME##_arg2_history[FFF_ARG_HISTORY_LEN];\
     static ARG3_TYPE FUNCNAME##_arg3_val; \
-    static ARG3_TYPE FUNCNAME##_arg3_history[50];\
+    static ARG3_TYPE FUNCNAME##_arg3_history[FFF_ARG_HISTORY_LEN];\
     static ARG4_TYPE FUNCNAME##_arg4_val; \
-    static ARG4_TYPE FUNCNAME##_arg4_history[50];\
+    static ARG4_TYPE FUNCNAME##_arg4_history[FFF_ARG_HISTORY_LEN];\
     static unsigned int FUNCNAME##_call_count = 0; \
-    static unsigned int FUNCNAME##_arg_history_len = 50;\
+    static unsigned int FUNCNAME##_arg_history_len = FFF_ARG_HISTORY_LEN;\
     static unsigned int FUNCNAME##_arg_histories_dropped = 0; \
     void FUNCNAME(ARG0_TYPE arg0, ARG1_TYPE arg1, ARG2_TYPE arg2, ARG3_TYPE arg3, ARG4_TYPE arg4){ \
         FUNCNAME##_arg0_val = arg0; \
@@ -291,19 +294,19 @@ STATIC_INIT(FUNCNAME) \
 #define FAKE_VOID_FUNC6(FUNCNAME, ARG0_TYPE, ARG1_TYPE, ARG2_TYPE, ARG3_TYPE, ARG4_TYPE, ARG5_TYPE) \
 extern "C"{ \
     static ARG0_TYPE FUNCNAME##_arg0_val; \
-    static ARG0_TYPE FUNCNAME##_arg0_history[50];\
+    static ARG0_TYPE FUNCNAME##_arg0_history[FFF_ARG_HISTORY_LEN];\
     static ARG1_TYPE FUNCNAME##_arg1_val; \
-    static ARG1_TYPE FUNCNAME##_arg1_history[50];\
+    static ARG1_TYPE FUNCNAME##_arg1_history[FFF_ARG_HISTORY_LEN];\
     static ARG2_TYPE FUNCNAME##_arg2_val; \
-    static ARG2_TYPE FUNCNAME##_arg2_history[50];\
+    static ARG2_TYPE FUNCNAME##_arg2_history[FFF_ARG_HISTORY_LEN];\
     static ARG3_TYPE FUNCNAME##_arg3_val; \
-    static ARG3_TYPE FUNCNAME##_arg3_history[50];\
+    static ARG3_TYPE FUNCNAME##_arg3_history[FFF_ARG_HISTORY_LEN];\
     static ARG4_TYPE FUNCNAME##_arg4_val; \
-    static ARG4_TYPE FUNCNAME##_arg4_history[50];\
+    static ARG4_TYPE FUNCNAME##_arg4_history[FFF_ARG_HISTORY_LEN];\
     static ARG5_TYPE FUNCNAME##_arg5_val; \
-    static ARG5_TYPE FUNCNAME##_arg5_history[50];\
+    static ARG5_TYPE FUNCNAME##_arg5_history[FFF_ARG_HISTORY_LEN];\
     static unsigned int FUNCNAME##_call_count = 0; \
-    static unsigned int FUNCNAME##_arg_history_len = 50;\
+    static unsigned int FUNCNAME##_arg_history_len = FFF_ARG_HISTORY_LEN;\
     static unsigned int FUNCNAME##_arg_histories_dropped = 0; \
     void FUNCNAME(ARG0_TYPE arg0, ARG1_TYPE arg1, ARG2_TYPE arg2, ARG3_TYPE arg3, ARG4_TYPE arg4, ARG5_TYPE arg5){ \
         FUNCNAME##_arg0_val = arg0; \
@@ -359,21 +362,21 @@ STATIC_INIT(FUNCNAME) \
 #define FAKE_VOID_FUNC7(FUNCNAME, ARG0_TYPE, ARG1_TYPE, ARG2_TYPE, ARG3_TYPE, ARG4_TYPE, ARG5_TYPE, ARG6_TYPE) \
 extern "C"{ \
     static ARG0_TYPE FUNCNAME##_arg0_val; \
-    static ARG0_TYPE FUNCNAME##_arg0_history[50];\
+    static ARG0_TYPE FUNCNAME##_arg0_history[FFF_ARG_HISTORY_LEN];\
     static ARG1_TYPE FUNCNAME##_arg1_val; \
-    static ARG1_TYPE FUNCNAME##_arg1_history[50];\
+    static ARG1_TYPE FUNCNAME##_arg1_history[FFF_ARG_HISTORY_LEN];\
     static ARG2_TYPE FUNCNAME##_arg2_val; \
-    static ARG2_TYPE FUNCNAME##_arg2_history[50];\
+    static ARG2_TYPE FUNCNAME##_arg2_history[FFF_ARG_HISTORY_LEN];\
     static ARG3_TYPE FUNCNAME##_arg3_val; \
-    static ARG3_TYPE FUNCNAME##_arg3_history[50];\
+    static ARG3_TYPE FUNCNAME##_arg3_history[FFF_ARG_HISTORY_LEN];\
     static ARG4_TYPE FUNCNAME##_arg4_val; \
-    static ARG4_TYPE FUNCNAME##_arg4_history[50];\
+    static ARG4_TYPE FUNCNAME##_arg4_history[FFF_ARG_HISTORY_LEN];\
     static ARG5_TYPE FUNCNAME##_arg5_val; \
-    static ARG5_TYPE FUNCNAME##_arg5_history[50];\
+    static ARG5_TYPE FUNCNAME##_arg5_history[FFF_ARG_HISTORY_LEN];\
     static ARG6_TYPE FUNCNAME##_arg6_val; \
-    static ARG6_TYPE FUNCNAME##_arg6_history[50];\
+    static ARG6_TYPE FUNCNAME##_arg6_history[FFF_ARG_HISTORY_LEN];\
     static unsigned int FUNCNAME##_call_count = 0; \
-    static unsigned int FUNCNAME##_arg_history_len = 50;\
+    static unsigned int FUNCNAME##_arg_history_len = FFF_ARG_HISTORY_LEN;\
     static unsigned int FUNCNAME##_arg_histories_dropped = 0; \
     void FUNCNAME(ARG0_TYPE arg0, ARG1_TYPE arg1, ARG2_TYPE arg2, ARG3_TYPE arg3, ARG4_TYPE arg4, ARG5_TYPE arg5, ARG6_TYPE arg6){ \
         FUNCNAME##_arg0_val = arg0; \
@@ -435,23 +438,23 @@ STATIC_INIT(FUNCNAME) \
 #define FAKE_VOID_FUNC8(FUNCNAME, ARG0_TYPE, ARG1_TYPE, ARG2_TYPE, ARG3_TYPE, ARG4_TYPE, ARG5_TYPE, ARG6_TYPE, ARG7_TYPE) \
 extern "C"{ \
     static ARG0_TYPE FUNCNAME##_arg0_val; \
-    static ARG0_TYPE FUNCNAME##_arg0_history[50];\
+    static ARG0_TYPE FUNCNAME##_arg0_history[FFF_ARG_HISTORY_LEN];\
     static ARG1_TYPE FUNCNAME##_arg1_val; \
-    static ARG1_TYPE FUNCNAME##_arg1_history[50];\
+    static ARG1_TYPE FUNCNAME##_arg1_history[FFF_ARG_HISTORY_LEN];\
     static ARG2_TYPE FUNCNAME##_arg2_val; \
-    static ARG2_TYPE FUNCNAME##_arg2_history[50];\
+    static ARG2_TYPE FUNCNAME##_arg2_history[FFF_ARG_HISTORY_LEN];\
     static ARG3_TYPE FUNCNAME##_arg3_val; \
-    static ARG3_TYPE FUNCNAME##_arg3_history[50];\
+    static ARG3_TYPE FUNCNAME##_arg3_history[FFF_ARG_HISTORY_LEN];\
     static ARG4_TYPE FUNCNAME##_arg4_val; \
-    static ARG4_TYPE FUNCNAME##_arg4_history[50];\
+    static ARG4_TYPE FUNCNAME##_arg4_history[FFF_ARG_HISTORY_LEN];\
     static ARG5_TYPE FUNCNAME##_arg5_val; \
-    static ARG5_TYPE FUNCNAME##_arg5_history[50];\
+    static ARG5_TYPE FUNCNAME##_arg5_history[FFF_ARG_HISTORY_LEN];\
     static ARG6_TYPE FUNCNAME##_arg6_val; \
-    static ARG6_TYPE FUNCNAME##_arg6_history[50];\
+    static ARG6_TYPE FUNCNAME##_arg6_history[FFF_ARG_HISTORY_LEN];\
     static ARG7_TYPE FUNCNAME##_arg7_val; \
-    static ARG7_TYPE FUNCNAME##_arg7_history[50];\
+    static ARG7_TYPE FUNCNAME##_arg7_history[FFF_ARG_HISTORY_LEN];\
     static unsigned int FUNCNAME##_call_count = 0; \
-    static unsigned int FUNCNAME##_arg_history_len = 50;\
+    static unsigned int FUNCNAME##_arg_history_len = FFF_ARG_HISTORY_LEN;\
     static unsigned int FUNCNAME##_arg_histories_dropped = 0; \
     void FUNCNAME(ARG0_TYPE arg0, ARG1_TYPE arg1, ARG2_TYPE arg2, ARG3_TYPE arg3, ARG4_TYPE arg4, ARG5_TYPE arg5, ARG6_TYPE arg6, ARG7_TYPE arg7){ \
         FUNCNAME##_arg0_val = arg0; \
@@ -519,25 +522,25 @@ STATIC_INIT(FUNCNAME) \
 #define FAKE_VOID_FUNC9(FUNCNAME, ARG0_TYPE, ARG1_TYPE, ARG2_TYPE, ARG3_TYPE, ARG4_TYPE, ARG5_TYPE, ARG6_TYPE, ARG7_TYPE, ARG8_TYPE) \
 extern "C"{ \
     static ARG0_TYPE FUNCNAME##_arg0_val; \
-    static ARG0_TYPE FUNCNAME##_arg0_history[50];\
+    static ARG0_TYPE FUNCNAME##_arg0_history[FFF_ARG_HISTORY_LEN];\
     static ARG1_TYPE FUNCNAME##_arg1_val; \
-    static ARG1_TYPE FUNCNAME##_arg1_history[50];\
+    static ARG1_TYPE FUNCNAME##_arg1_history[FFF_ARG_HISTORY_LEN];\
     static ARG2_TYPE FUNCNAME##_arg2_val; \
-    static ARG2_TYPE FUNCNAME##_arg2_history[50];\
+    static ARG2_TYPE FUNCNAME##_arg2_history[FFF_ARG_HISTORY_LEN];\
     static ARG3_TYPE FUNCNAME##_arg3_val; \
-    static ARG3_TYPE FUNCNAME##_arg3_history[50];\
+    static ARG3_TYPE FUNCNAME##_arg3_history[FFF_ARG_HISTORY_LEN];\
     static ARG4_TYPE FUNCNAME##_arg4_val; \
-    static ARG4_TYPE FUNCNAME##_arg4_history[50];\
+    static ARG4_TYPE FUNCNAME##_arg4_history[FFF_ARG_HISTORY_LEN];\
     static ARG5_TYPE FUNCNAME##_arg5_val; \
-    static ARG5_TYPE FUNCNAME##_arg5_history[50];\
+    static ARG5_TYPE FUNCNAME##_arg5_history[FFF_ARG_HISTORY_LEN];\
     static ARG6_TYPE FUNCNAME##_arg6_val; \
-    static ARG6_TYPE FUNCNAME##_arg6_history[50];\
+    static ARG6_TYPE FUNCNAME##_arg6_history[FFF_ARG_HISTORY_LEN];\
     static ARG7_TYPE FUNCNAME##_arg7_val; \
-    static ARG7_TYPE FUNCNAME##_arg7_history[50];\
+    static ARG7_TYPE FUNCNAME##_arg7_history[FFF_ARG_HISTORY_LEN];\
     static ARG8_TYPE FUNCNAME##_arg8_val; \
-    static ARG8_TYPE FUNCNAME##_arg8_history[50];\
+    static ARG8_TYPE FUNCNAME##_arg8_history[FFF_ARG_HISTORY_LEN];\
     static unsigned int FUNCNAME##_call_count = 0; \
-    static unsigned int FUNCNAME##_arg_history_len = 50;\
+    static unsigned int FUNCNAME##_arg_history_len = FFF_ARG_HISTORY_LEN;\
     static unsigned int FUNCNAME##_arg_histories_dropped = 0; \
     void FUNCNAME(ARG0_TYPE arg0, ARG1_TYPE arg1, ARG2_TYPE arg2, ARG3_TYPE arg3, ARG4_TYPE arg4, ARG5_TYPE arg5, ARG6_TYPE arg6, ARG7_TYPE arg7, ARG8_TYPE arg8){ \
         FUNCNAME##_arg0_val = arg0; \
@@ -615,7 +618,7 @@ extern "C"{ \
     static int FUNCNAME##_return_val_seq_idx = 0; \
     static RETURN_TYPE * FUNCNAME##_return_val_seq = 0; \
     static unsigned int FUNCNAME##_call_count = 0; \
-    static unsigned int FUNCNAME##_arg_history_len = 50;\
+    static unsigned int FUNCNAME##_arg_history_len = FFF_ARG_HISTORY_LEN;\
     static unsigned int FUNCNAME##_arg_histories_dropped = 0; \
     RETURN_TYPE FUNCNAME(){ \
         if(FUNCNAME##_call_count >= FUNCNAME##_arg_history_len){\
@@ -646,13 +649,13 @@ STATIC_INIT(FUNCNAME) \
 #define FAKE_VALUE_FUNC1(RETURN_TYPE, FUNCNAME, ARG0_TYPE) \
 extern "C"{ \
     static ARG0_TYPE FUNCNAME##_arg0_val; \
-    static ARG0_TYPE FUNCNAME##_arg0_history[50];\
+    static ARG0_TYPE FUNCNAME##_arg0_history[FFF_ARG_HISTORY_LEN];\
     static RETURN_TYPE FUNCNAME##_return_val; \
     static int FUNCNAME##_return_val_seq_len = 0; \
     static int FUNCNAME##_return_val_seq_idx = 0; \
     static RETURN_TYPE * FUNCNAME##_return_val_seq = 0; \
     static unsigned int FUNCNAME##_call_count = 0; \
-    static unsigned int FUNCNAME##_arg_history_len = 50;\
+    static unsigned int FUNCNAME##_arg_history_len = FFF_ARG_HISTORY_LEN;\
     static unsigned int FUNCNAME##_arg_histories_dropped = 0; \
     RETURN_TYPE FUNCNAME(ARG0_TYPE arg0){ \
         FUNCNAME##_arg0_val = arg0; \
@@ -689,15 +692,15 @@ STATIC_INIT(FUNCNAME) \
 #define FAKE_VALUE_FUNC2(RETURN_TYPE, FUNCNAME, ARG0_TYPE, ARG1_TYPE) \
 extern "C"{ \
     static ARG0_TYPE FUNCNAME##_arg0_val; \
-    static ARG0_TYPE FUNCNAME##_arg0_history[50];\
+    static ARG0_TYPE FUNCNAME##_arg0_history[FFF_ARG_HISTORY_LEN];\
     static ARG1_TYPE FUNCNAME##_arg1_val; \
-    static ARG1_TYPE FUNCNAME##_arg1_history[50];\
+    static ARG1_TYPE FUNCNAME##_arg1_history[FFF_ARG_HISTORY_LEN];\
     static RETURN_TYPE FUNCNAME##_return_val; \
     static int FUNCNAME##_return_val_seq_len = 0; \
     static int FUNCNAME##_return_val_seq_idx = 0; \
     static RETURN_TYPE * FUNCNAME##_return_val_seq = 0; \
     static unsigned int FUNCNAME##_call_count = 0; \
-    static unsigned int FUNCNAME##_arg_history_len = 50;\
+    static unsigned int FUNCNAME##_arg_history_len = FFF_ARG_HISTORY_LEN;\
     static unsigned int FUNCNAME##_arg_histories_dropped = 0; \
     RETURN_TYPE FUNCNAME(ARG0_TYPE arg0, ARG1_TYPE arg1){ \
         FUNCNAME##_arg0_val = arg0; \
@@ -740,17 +743,17 @@ STATIC_INIT(FUNCNAME) \
 #define FAKE_VALUE_FUNC3(RETURN_TYPE, FUNCNAME, ARG0_TYPE, ARG1_TYPE, ARG2_TYPE) \
 extern "C"{ \
     static ARG0_TYPE FUNCNAME##_arg0_val; \
-    static ARG0_TYPE FUNCNAME##_arg0_history[50];\
+    static ARG0_TYPE FUNCNAME##_arg0_history[FFF_ARG_HISTORY_LEN];\
     static ARG1_TYPE FUNCNAME##_arg1_val; \
-    static ARG1_TYPE FUNCNAME##_arg1_history[50];\
+    static ARG1_TYPE FUNCNAME##_arg1_history[FFF_ARG_HISTORY_LEN];\
     static ARG2_TYPE FUNCNAME##_arg2_val; \
-    static ARG2_TYPE FUNCNAME##_arg2_history[50];\
+    static ARG2_TYPE FUNCNAME##_arg2_history[FFF_ARG_HISTORY_LEN];\
     static RETURN_TYPE FUNCNAME##_return_val; \
     static int FUNCNAME##_return_val_seq_len = 0; \
     static int FUNCNAME##_return_val_seq_idx = 0; \
     static RETURN_TYPE * FUNCNAME##_return_val_seq = 0; \
     static unsigned int FUNCNAME##_call_count = 0; \
-    static unsigned int FUNCNAME##_arg_history_len = 50;\
+    static unsigned int FUNCNAME##_arg_history_len = FFF_ARG_HISTORY_LEN;\
     static unsigned int FUNCNAME##_arg_histories_dropped = 0; \
     RETURN_TYPE FUNCNAME(ARG0_TYPE arg0, ARG1_TYPE arg1, ARG2_TYPE arg2){ \
         FUNCNAME##_arg0_val = arg0; \
@@ -799,19 +802,19 @@ STATIC_INIT(FUNCNAME) \
 #define FAKE_VALUE_FUNC4(RETURN_TYPE, FUNCNAME, ARG0_TYPE, ARG1_TYPE, ARG2_TYPE, ARG3_TYPE) \
 extern "C"{ \
     static ARG0_TYPE FUNCNAME##_arg0_val; \
-    static ARG0_TYPE FUNCNAME##_arg0_history[50];\
+    static ARG0_TYPE FUNCNAME##_arg0_history[FFF_ARG_HISTORY_LEN];\
     static ARG1_TYPE FUNCNAME##_arg1_val; \
-    static ARG1_TYPE FUNCNAME##_arg1_history[50];\
+    static ARG1_TYPE FUNCNAME##_arg1_history[FFF_ARG_HISTORY_LEN];\
     static ARG2_TYPE FUNCNAME##_arg2_val; \
-    static ARG2_TYPE FUNCNAME##_arg2_history[50];\
+    static ARG2_TYPE FUNCNAME##_arg2_history[FFF_ARG_HISTORY_LEN];\
     static ARG3_TYPE FUNCNAME##_arg3_val; \
-    static ARG3_TYPE FUNCNAME##_arg3_history[50];\
+    static ARG3_TYPE FUNCNAME##_arg3_history[FFF_ARG_HISTORY_LEN];\
     static RETURN_TYPE FUNCNAME##_return_val; \
     static int FUNCNAME##_return_val_seq_len = 0; \
     static int FUNCNAME##_return_val_seq_idx = 0; \
     static RETURN_TYPE * FUNCNAME##_return_val_seq = 0; \
     static unsigned int FUNCNAME##_call_count = 0; \
-    static unsigned int FUNCNAME##_arg_history_len = 50;\
+    static unsigned int FUNCNAME##_arg_history_len = FFF_ARG_HISTORY_LEN;\
     static unsigned int FUNCNAME##_arg_histories_dropped = 0; \
     RETURN_TYPE FUNCNAME(ARG0_TYPE arg0, ARG1_TYPE arg1, ARG2_TYPE arg2, ARG3_TYPE arg3){ \
         FUNCNAME##_arg0_val = arg0; \
@@ -866,21 +869,21 @@ STATIC_INIT(FUNCNAME) \
 #define FAKE_VALUE_FUNC5(RETURN_TYPE, FUNCNAME, ARG0_TYPE, ARG1_TYPE, ARG2_TYPE, ARG3_TYPE, ARG4_TYPE) \
 extern "C"{ \
     static ARG0_TYPE FUNCNAME##_arg0_val; \
-    static ARG0_TYPE FUNCNAME##_arg0_history[50];\
+    static ARG0_TYPE FUNCNAME##_arg0_history[FFF_ARG_HISTORY_LEN];\
     static ARG1_TYPE FUNCNAME##_arg1_val; \
-    static ARG1_TYPE FUNCNAME##_arg1_history[50];\
+    static ARG1_TYPE FUNCNAME##_arg1_history[FFF_ARG_HISTORY_LEN];\
     static ARG2_TYPE FUNCNAME##_arg2_val; \
-    static ARG2_TYPE FUNCNAME##_arg2_history[50];\
+    static ARG2_TYPE FUNCNAME##_arg2_history[FFF_ARG_HISTORY_LEN];\
     static ARG3_TYPE FUNCNAME##_arg3_val; \
-    static ARG3_TYPE FUNCNAME##_arg3_history[50];\
+    static ARG3_TYPE FUNCNAME##_arg3_history[FFF_ARG_HISTORY_LEN];\
     static ARG4_TYPE FUNCNAME##_arg4_val; \
-    static ARG4_TYPE FUNCNAME##_arg4_history[50];\
+    static ARG4_TYPE FUNCNAME##_arg4_history[FFF_ARG_HISTORY_LEN];\
     static RETURN_TYPE FUNCNAME##_return_val; \
     static int FUNCNAME##_return_val_seq_len = 0; \
     static int FUNCNAME##_return_val_seq_idx = 0; \
     static RETURN_TYPE * FUNCNAME##_return_val_seq = 0; \
     static unsigned int FUNCNAME##_call_count = 0; \
-    static unsigned int FUNCNAME##_arg_history_len = 50;\
+    static unsigned int FUNCNAME##_arg_history_len = FFF_ARG_HISTORY_LEN;\
     static unsigned int FUNCNAME##_arg_histories_dropped = 0; \
     RETURN_TYPE FUNCNAME(ARG0_TYPE arg0, ARG1_TYPE arg1, ARG2_TYPE arg2, ARG3_TYPE arg3, ARG4_TYPE arg4){ \
         FUNCNAME##_arg0_val = arg0; \
@@ -941,23 +944,23 @@ STATIC_INIT(FUNCNAME) \
 #define FAKE_VALUE_FUNC6(RETURN_TYPE, FUNCNAME, ARG0_TYPE, ARG1_TYPE, ARG2_TYPE, ARG3_TYPE, ARG4_TYPE, ARG5_TYPE) \
 extern "C"{ \
     static ARG0_TYPE FUNCNAME##_arg0_val; \
-    static ARG0_TYPE FUNCNAME##_arg0_history[50];\
+    static ARG0_TYPE FUNCNAME##_arg0_history[FFF_ARG_HISTORY_LEN];\
     static ARG1_TYPE FUNCNAME##_arg1_val; \
-    static ARG1_TYPE FUNCNAME##_arg1_history[50];\
+    static ARG1_TYPE FUNCNAME##_arg1_history[FFF_ARG_HISTORY_LEN];\
     static ARG2_TYPE FUNCNAME##_arg2_val; \
-    static ARG2_TYPE FUNCNAME##_arg2_history[50];\
+    static ARG2_TYPE FUNCNAME##_arg2_history[FFF_ARG_HISTORY_LEN];\
     static ARG3_TYPE FUNCNAME##_arg3_val; \
-    static ARG3_TYPE FUNCNAME##_arg3_history[50];\
+    static ARG3_TYPE FUNCNAME##_arg3_history[FFF_ARG_HISTORY_LEN];\
     static ARG4_TYPE FUNCNAME##_arg4_val; \
-    static ARG4_TYPE FUNCNAME##_arg4_history[50];\
+    static ARG4_TYPE FUNCNAME##_arg4_history[FFF_ARG_HISTORY_LEN];\
     static ARG5_TYPE FUNCNAME##_arg5_val; \
-    static ARG5_TYPE FUNCNAME##_arg5_history[50];\
+    static ARG5_TYPE FUNCNAME##_arg5_history[FFF_ARG_HISTORY_LEN];\
     static RETURN_TYPE FUNCNAME##_return_val; \
     static int FUNCNAME##_return_val_seq_len = 0; \
     static int FUNCNAME##_return_val_seq_idx = 0; \
     static RETURN_TYPE * FUNCNAME##_return_val_seq = 0; \
     static unsigned int FUNCNAME##_call_count = 0; \
-    static unsigned int FUNCNAME##_arg_history_len = 50;\
+    static unsigned int FUNCNAME##_arg_history_len = FFF_ARG_HISTORY_LEN;\
     static unsigned int FUNCNAME##_arg_histories_dropped = 0; \
     RETURN_TYPE FUNCNAME(ARG0_TYPE arg0, ARG1_TYPE arg1, ARG2_TYPE arg2, ARG3_TYPE arg3, ARG4_TYPE arg4, ARG5_TYPE arg5){ \
         FUNCNAME##_arg0_val = arg0; \
@@ -1024,25 +1027,25 @@ STATIC_INIT(FUNCNAME) \
 #define FAKE_VALUE_FUNC7(RETURN_TYPE, FUNCNAME, ARG0_TYPE, ARG1_TYPE, ARG2_TYPE, ARG3_TYPE, ARG4_TYPE, ARG5_TYPE, ARG6_TYPE) \
 extern "C"{ \
     static ARG0_TYPE FUNCNAME##_arg0_val; \
-    static ARG0_TYPE FUNCNAME##_arg0_history[50];\
+    static ARG0_TYPE FUNCNAME##_arg0_history[FFF_ARG_HISTORY_LEN];\
     static ARG1_TYPE FUNCNAME##_arg1_val; \
-    static ARG1_TYPE FUNCNAME##_arg1_history[50];\
+    static ARG1_TYPE FUNCNAME##_arg1_history[FFF_ARG_HISTORY_LEN];\
     static ARG2_TYPE FUNCNAME##_arg2_val; \
-    static ARG2_TYPE FUNCNAME##_arg2_history[50];\
+    static ARG2_TYPE FUNCNAME##_arg2_history[FFF_ARG_HISTORY_LEN];\
     static ARG3_TYPE FUNCNAME##_arg3_val; \
-    static ARG3_TYPE FUNCNAME##_arg3_history[50];\
+    static ARG3_TYPE FUNCNAME##_arg3_history[FFF_ARG_HISTORY_LEN];\
     static ARG4_TYPE FUNCNAME##_arg4_val; \
-    static ARG4_TYPE FUNCNAME##_arg4_history[50];\
+    static ARG4_TYPE FUNCNAME##_arg4_history[FFF_ARG_HISTORY_LEN];\
     static ARG5_TYPE FUNCNAME##_arg5_val; \
-    static ARG5_TYPE FUNCNAME##_arg5_history[50];\
+    static ARG5_TYPE FUNCNAME##_arg5_history[FFF_ARG_HISTORY_LEN];\
     static ARG6_TYPE FUNCNAME##_arg6_val; \
-    static ARG6_TYPE FUNCNAME##_arg6_history[50];\
+    static ARG6_TYPE FUNCNAME##_arg6_history[FFF_ARG_HISTORY_LEN];\
     static RETURN_TYPE FUNCNAME##_return_val; \
     static int FUNCNAME##_return_val_seq_len = 0; \
     static int FUNCNAME##_return_val_seq_idx = 0; \
     static RETURN_TYPE * FUNCNAME##_return_val_seq = 0; \
     static unsigned int FUNCNAME##_call_count = 0; \
-    static unsigned int FUNCNAME##_arg_history_len = 50;\
+    static unsigned int FUNCNAME##_arg_history_len = FFF_ARG_HISTORY_LEN;\
     static unsigned int FUNCNAME##_arg_histories_dropped = 0; \
     RETURN_TYPE FUNCNAME(ARG0_TYPE arg0, ARG1_TYPE arg1, ARG2_TYPE arg2, ARG3_TYPE arg3, ARG4_TYPE arg4, ARG5_TYPE arg5, ARG6_TYPE arg6){ \
         FUNCNAME##_arg0_val = arg0; \
@@ -1115,27 +1118,27 @@ STATIC_INIT(FUNCNAME) \
 #define FAKE_VALUE_FUNC8(RETURN_TYPE, FUNCNAME, ARG0_TYPE, ARG1_TYPE, ARG2_TYPE, ARG3_TYPE, ARG4_TYPE, ARG5_TYPE, ARG6_TYPE, ARG7_TYPE) \
 extern "C"{ \
     static ARG0_TYPE FUNCNAME##_arg0_val; \
-    static ARG0_TYPE FUNCNAME##_arg0_history[50];\
+    static ARG0_TYPE FUNCNAME##_arg0_history[FFF_ARG_HISTORY_LEN];\
     static ARG1_TYPE FUNCNAME##_arg1_val; \
-    static ARG1_TYPE FUNCNAME##_arg1_history[50];\
+    static ARG1_TYPE FUNCNAME##_arg1_history[FFF_ARG_HISTORY_LEN];\
     static ARG2_TYPE FUNCNAME##_arg2_val; \
-    static ARG2_TYPE FUNCNAME##_arg2_history[50];\
+    static ARG2_TYPE FUNCNAME##_arg2_history[FFF_ARG_HISTORY_LEN];\
     static ARG3_TYPE FUNCNAME##_arg3_val; \
-    static ARG3_TYPE FUNCNAME##_arg3_history[50];\
+    static ARG3_TYPE FUNCNAME##_arg3_history[FFF_ARG_HISTORY_LEN];\
     static ARG4_TYPE FUNCNAME##_arg4_val; \
-    static ARG4_TYPE FUNCNAME##_arg4_history[50];\
+    static ARG4_TYPE FUNCNAME##_arg4_history[FFF_ARG_HISTORY_LEN];\
     static ARG5_TYPE FUNCNAME##_arg5_val; \
-    static ARG5_TYPE FUNCNAME##_arg5_history[50];\
+    static ARG5_TYPE FUNCNAME##_arg5_history[FFF_ARG_HISTORY_LEN];\
     static ARG6_TYPE FUNCNAME##_arg6_val; \
-    static ARG6_TYPE FUNCNAME##_arg6_history[50];\
+    static ARG6_TYPE FUNCNAME##_arg6_history[FFF_ARG_HISTORY_LEN];\
     static ARG7_TYPE FUNCNAME##_arg7_val; \
-    static ARG7_TYPE FUNCNAME##_arg7_history[50];\
+    static ARG7_TYPE FUNCNAME##_arg7_history[FFF_ARG_HISTORY_LEN];\
     static RETURN_TYPE FUNCNAME##_return_val; \
     static int FUNCNAME##_return_val_seq_len = 0; \
     static int FUNCNAME##_return_val_seq_idx = 0; \
     static RETURN_TYPE * FUNCNAME##_return_val_seq = 0; \
     static unsigned int FUNCNAME##_call_count = 0; \
-    static unsigned int FUNCNAME##_arg_history_len = 50;\
+    static unsigned int FUNCNAME##_arg_history_len = FFF_ARG_HISTORY_LEN;\
     static unsigned int FUNCNAME##_arg_histories_dropped = 0; \
     RETURN_TYPE FUNCNAME(ARG0_TYPE arg0, ARG1_TYPE arg1, ARG2_TYPE arg2, ARG3_TYPE arg3, ARG4_TYPE arg4, ARG5_TYPE arg5, ARG6_TYPE arg6, ARG7_TYPE arg7){ \
         FUNCNAME##_arg0_val = arg0; \
@@ -1214,29 +1217,29 @@ STATIC_INIT(FUNCNAME) \
 #define FAKE_VALUE_FUNC9(RETURN_TYPE, FUNCNAME, ARG0_TYPE, ARG1_TYPE, ARG2_TYPE, ARG3_TYPE, ARG4_TYPE, ARG5_TYPE, ARG6_TYPE, ARG7_TYPE, ARG8_TYPE) \
 extern "C"{ \
     static ARG0_TYPE FUNCNAME##_arg0_val; \
-    static ARG0_TYPE FUNCNAME##_arg0_history[50];\
+    static ARG0_TYPE FUNCNAME##_arg0_history[FFF_ARG_HISTORY_LEN];\
     static ARG1_TYPE FUNCNAME##_arg1_val; \
-    static ARG1_TYPE FUNCNAME##_arg1_history[50];\
+    static ARG1_TYPE FUNCNAME##_arg1_history[FFF_ARG_HISTORY_LEN];\
     static ARG2_TYPE FUNCNAME##_arg2_val; \
-    static ARG2_TYPE FUNCNAME##_arg2_history[50];\
+    static ARG2_TYPE FUNCNAME##_arg2_history[FFF_ARG_HISTORY_LEN];\
     static ARG3_TYPE FUNCNAME##_arg3_val; \
-    static ARG3_TYPE FUNCNAME##_arg3_history[50];\
+    static ARG3_TYPE FUNCNAME##_arg3_history[FFF_ARG_HISTORY_LEN];\
     static ARG4_TYPE FUNCNAME##_arg4_val; \
-    static ARG4_TYPE FUNCNAME##_arg4_history[50];\
+    static ARG4_TYPE FUNCNAME##_arg4_history[FFF_ARG_HISTORY_LEN];\
     static ARG5_TYPE FUNCNAME##_arg5_val; \
-    static ARG5_TYPE FUNCNAME##_arg5_history[50];\
+    static ARG5_TYPE FUNCNAME##_arg5_history[FFF_ARG_HISTORY_LEN];\
     static ARG6_TYPE FUNCNAME##_arg6_val; \
-    static ARG6_TYPE FUNCNAME##_arg6_history[50];\
+    static ARG6_TYPE FUNCNAME##_arg6_history[FFF_ARG_HISTORY_LEN];\
     static ARG7_TYPE FUNCNAME##_arg7_val; \
-    static ARG7_TYPE FUNCNAME##_arg7_history[50];\
+    static ARG7_TYPE FUNCNAME##_arg7_history[FFF_ARG_HISTORY_LEN];\
     static ARG8_TYPE FUNCNAME##_arg8_val; \
-    static ARG8_TYPE FUNCNAME##_arg8_history[50];\
+    static ARG8_TYPE FUNCNAME##_arg8_history[FFF_ARG_HISTORY_LEN];\
     static RETURN_TYPE FUNCNAME##_return_val; \
     static int FUNCNAME##_return_val_seq_len = 0; \
     static int FUNCNAME##_return_val_seq_idx = 0; \
     static RETURN_TYPE * FUNCNAME##_return_val_seq = 0; \
     static unsigned int FUNCNAME##_call_count = 0; \
-    static unsigned int FUNCNAME##_arg_history_len = 50;\
+    static unsigned int FUNCNAME##_arg_history_len = FFF_ARG_HISTORY_LEN;\
     static unsigned int FUNCNAME##_arg_histories_dropped = 0; \
     RETURN_TYPE FUNCNAME(ARG0_TYPE arg0, ARG1_TYPE arg1, ARG2_TYPE arg2, ARG3_TYPE arg3, ARG4_TYPE arg4, ARG5_TYPE arg5, ARG6_TYPE arg6, ARG7_TYPE arg7, ARG8_TYPE arg8){ \
         FUNCNAME##_arg0_val = arg0; \
@@ -1317,23 +1320,26 @@ extern "C"{ \
 STATIC_INIT(FUNCNAME) \
 
 #else  /* ansi c */
-#define FFF_MAX_ARGS ((unsigned)10)
-#define FFF_ARG_HISTORY_LEN ((unsigned)50)
-#define FFF_CALL_HISTORY_LEN ((unsigned)50)
+#define FFF_MAX_ARGS (10u)
+#ifndef FFF_ARG_HISTORY_LEN
+    #define FFF_ARG_HISTORY_LEN (50u)
+#endif
+#ifndef FFF_CALL_HISTORY_LEN
+  #define FFF_CALL_HISTORY_LEN (50u)
+#endif
 
 /* Defining a function to reset a fake function */
 #define RESET_FAKE(FUNCNAME) { \
     FUNCNAME##_reset(); \
 } \
 
-#define MAX_CALL_HISTORY 50u
-static void * call_history[MAX_CALL_HISTORY];
+static void * call_history[FFF_CALL_HISTORY_LEN];
 static unsigned int call_history_idx;
 static void RESET_HISTORY() { 
     call_history_idx = 0; 
 }
 #define REGISTER_CALL(function) \
-   if(call_history_idx < MAX_CALL_HISTORY) call_history[call_history_idx++] = (void *)function;
+   if(call_history_idx < FFF_CALL_HISTORY_LEN) call_history[call_history_idx++] = (void *)function;
 #define SET_RETURN_SEQ( FUNCNAME, ARRAY_POINTER, ARRAY_LEN) \
                         FUNCNAME##_return_val_seq = ARRAY_POINTER; \
                         FUNCNAME##_return_val_seq_len = ARRAY_LEN;
@@ -1341,7 +1347,7 @@ static void RESET_HISTORY() {
 /* Defining a void function with 0 parameters*/
 #define FAKE_VOID_FUNC0(FUNCNAME) \
     static unsigned int FUNCNAME##_call_count = 0; \
-    static unsigned int FUNCNAME##_arg_history_len = 50;\
+    static unsigned int FUNCNAME##_arg_history_len = FFF_ARG_HISTORY_LEN;\
     static unsigned int FUNCNAME##_arg_histories_dropped = 0; \
     void FUNCNAME(){ \
         if(FUNCNAME##_call_count >= FUNCNAME##_arg_history_len){\
@@ -1358,9 +1364,9 @@ static void RESET_HISTORY() {
 /* Defining a void function with 1 parameters*/
 #define FAKE_VOID_FUNC1(FUNCNAME, ARG0_TYPE) \
     static ARG0_TYPE FUNCNAME##_arg0_val; \
-    static ARG0_TYPE FUNCNAME##_arg0_history[50];\
+    static ARG0_TYPE FUNCNAME##_arg0_history[FFF_ARG_HISTORY_LEN];\
     static unsigned int FUNCNAME##_call_count = 0; \
-    static unsigned int FUNCNAME##_arg_history_len = 50;\
+    static unsigned int FUNCNAME##_arg_history_len = FFF_ARG_HISTORY_LEN;\
     static unsigned int FUNCNAME##_arg_histories_dropped = 0; \
     void FUNCNAME(ARG0_TYPE arg0){ \
         FUNCNAME##_arg0_val = arg0; \
@@ -1383,11 +1389,11 @@ static void RESET_HISTORY() {
 /* Defining a void function with 2 parameters*/
 #define FAKE_VOID_FUNC2(FUNCNAME, ARG0_TYPE, ARG1_TYPE) \
     static ARG0_TYPE FUNCNAME##_arg0_val; \
-    static ARG0_TYPE FUNCNAME##_arg0_history[50];\
+    static ARG0_TYPE FUNCNAME##_arg0_history[FFF_ARG_HISTORY_LEN];\
     static ARG1_TYPE FUNCNAME##_arg1_val; \
-    static ARG1_TYPE FUNCNAME##_arg1_history[50];\
+    static ARG1_TYPE FUNCNAME##_arg1_history[FFF_ARG_HISTORY_LEN];\
     static unsigned int FUNCNAME##_call_count = 0; \
-    static unsigned int FUNCNAME##_arg_history_len = 50;\
+    static unsigned int FUNCNAME##_arg_history_len = FFF_ARG_HISTORY_LEN;\
     static unsigned int FUNCNAME##_arg_histories_dropped = 0; \
     void FUNCNAME(ARG0_TYPE arg0, ARG1_TYPE arg1){ \
         FUNCNAME##_arg0_val = arg0; \
@@ -1416,13 +1422,13 @@ static void RESET_HISTORY() {
 /* Defining a void function with 3 parameters*/
 #define FAKE_VOID_FUNC3(FUNCNAME, ARG0_TYPE, ARG1_TYPE, ARG2_TYPE) \
     static ARG0_TYPE FUNCNAME##_arg0_val; \
-    static ARG0_TYPE FUNCNAME##_arg0_history[50];\
+    static ARG0_TYPE FUNCNAME##_arg0_history[FFF_ARG_HISTORY_LEN];\
     static ARG1_TYPE FUNCNAME##_arg1_val; \
-    static ARG1_TYPE FUNCNAME##_arg1_history[50];\
+    static ARG1_TYPE FUNCNAME##_arg1_history[FFF_ARG_HISTORY_LEN];\
     static ARG2_TYPE FUNCNAME##_arg2_val; \
-    static ARG2_TYPE FUNCNAME##_arg2_history[50];\
+    static ARG2_TYPE FUNCNAME##_arg2_history[FFF_ARG_HISTORY_LEN];\
     static unsigned int FUNCNAME##_call_count = 0; \
-    static unsigned int FUNCNAME##_arg_history_len = 50;\
+    static unsigned int FUNCNAME##_arg_history_len = FFF_ARG_HISTORY_LEN;\
     static unsigned int FUNCNAME##_arg_histories_dropped = 0; \
     void FUNCNAME(ARG0_TYPE arg0, ARG1_TYPE arg1, ARG2_TYPE arg2){ \
         FUNCNAME##_arg0_val = arg0; \
@@ -1457,15 +1463,15 @@ static void RESET_HISTORY() {
 /* Defining a void function with 4 parameters*/
 #define FAKE_VOID_FUNC4(FUNCNAME, ARG0_TYPE, ARG1_TYPE, ARG2_TYPE, ARG3_TYPE) \
     static ARG0_TYPE FUNCNAME##_arg0_val; \
-    static ARG0_TYPE FUNCNAME##_arg0_history[50];\
+    static ARG0_TYPE FUNCNAME##_arg0_history[FFF_ARG_HISTORY_LEN];\
     static ARG1_TYPE FUNCNAME##_arg1_val; \
-    static ARG1_TYPE FUNCNAME##_arg1_history[50];\
+    static ARG1_TYPE FUNCNAME##_arg1_history[FFF_ARG_HISTORY_LEN];\
     static ARG2_TYPE FUNCNAME##_arg2_val; \
-    static ARG2_TYPE FUNCNAME##_arg2_history[50];\
+    static ARG2_TYPE FUNCNAME##_arg2_history[FFF_ARG_HISTORY_LEN];\
     static ARG3_TYPE FUNCNAME##_arg3_val; \
-    static ARG3_TYPE FUNCNAME##_arg3_history[50];\
+    static ARG3_TYPE FUNCNAME##_arg3_history[FFF_ARG_HISTORY_LEN];\
     static unsigned int FUNCNAME##_call_count = 0; \
-    static unsigned int FUNCNAME##_arg_history_len = 50;\
+    static unsigned int FUNCNAME##_arg_history_len = FFF_ARG_HISTORY_LEN;\
     static unsigned int FUNCNAME##_arg_histories_dropped = 0; \
     void FUNCNAME(ARG0_TYPE arg0, ARG1_TYPE arg1, ARG2_TYPE arg2, ARG3_TYPE arg3){ \
         FUNCNAME##_arg0_val = arg0; \
@@ -1506,17 +1512,17 @@ static void RESET_HISTORY() {
 /* Defining a void function with 5 parameters*/
 #define FAKE_VOID_FUNC5(FUNCNAME, ARG0_TYPE, ARG1_TYPE, ARG2_TYPE, ARG3_TYPE, ARG4_TYPE) \
     static ARG0_TYPE FUNCNAME##_arg0_val; \
-    static ARG0_TYPE FUNCNAME##_arg0_history[50];\
+    static ARG0_TYPE FUNCNAME##_arg0_history[FFF_ARG_HISTORY_LEN];\
     static ARG1_TYPE FUNCNAME##_arg1_val; \
-    static ARG1_TYPE FUNCNAME##_arg1_history[50];\
+    static ARG1_TYPE FUNCNAME##_arg1_history[FFF_ARG_HISTORY_LEN];\
     static ARG2_TYPE FUNCNAME##_arg2_val; \
-    static ARG2_TYPE FUNCNAME##_arg2_history[50];\
+    static ARG2_TYPE FUNCNAME##_arg2_history[FFF_ARG_HISTORY_LEN];\
     static ARG3_TYPE FUNCNAME##_arg3_val; \
-    static ARG3_TYPE FUNCNAME##_arg3_history[50];\
+    static ARG3_TYPE FUNCNAME##_arg3_history[FFF_ARG_HISTORY_LEN];\
     static ARG4_TYPE FUNCNAME##_arg4_val; \
-    static ARG4_TYPE FUNCNAME##_arg4_history[50];\
+    static ARG4_TYPE FUNCNAME##_arg4_history[FFF_ARG_HISTORY_LEN];\
     static unsigned int FUNCNAME##_call_count = 0; \
-    static unsigned int FUNCNAME##_arg_history_len = 50;\
+    static unsigned int FUNCNAME##_arg_history_len = FFF_ARG_HISTORY_LEN;\
     static unsigned int FUNCNAME##_arg_histories_dropped = 0; \
     void FUNCNAME(ARG0_TYPE arg0, ARG1_TYPE arg1, ARG2_TYPE arg2, ARG3_TYPE arg3, ARG4_TYPE arg4){ \
         FUNCNAME##_arg0_val = arg0; \
@@ -1563,19 +1569,19 @@ static void RESET_HISTORY() {
 /* Defining a void function with 6 parameters*/
 #define FAKE_VOID_FUNC6(FUNCNAME, ARG0_TYPE, ARG1_TYPE, ARG2_TYPE, ARG3_TYPE, ARG4_TYPE, ARG5_TYPE) \
     static ARG0_TYPE FUNCNAME##_arg0_val; \
-    static ARG0_TYPE FUNCNAME##_arg0_history[50];\
+    static ARG0_TYPE FUNCNAME##_arg0_history[FFF_ARG_HISTORY_LEN];\
     static ARG1_TYPE FUNCNAME##_arg1_val; \
-    static ARG1_TYPE FUNCNAME##_arg1_history[50];\
+    static ARG1_TYPE FUNCNAME##_arg1_history[FFF_ARG_HISTORY_LEN];\
     static ARG2_TYPE FUNCNAME##_arg2_val; \
-    static ARG2_TYPE FUNCNAME##_arg2_history[50];\
+    static ARG2_TYPE FUNCNAME##_arg2_history[FFF_ARG_HISTORY_LEN];\
     static ARG3_TYPE FUNCNAME##_arg3_val; \
-    static ARG3_TYPE FUNCNAME##_arg3_history[50];\
+    static ARG3_TYPE FUNCNAME##_arg3_history[FFF_ARG_HISTORY_LEN];\
     static ARG4_TYPE FUNCNAME##_arg4_val; \
-    static ARG4_TYPE FUNCNAME##_arg4_history[50];\
+    static ARG4_TYPE FUNCNAME##_arg4_history[FFF_ARG_HISTORY_LEN];\
     static ARG5_TYPE FUNCNAME##_arg5_val; \
-    static ARG5_TYPE FUNCNAME##_arg5_history[50];\
+    static ARG5_TYPE FUNCNAME##_arg5_history[FFF_ARG_HISTORY_LEN];\
     static unsigned int FUNCNAME##_call_count = 0; \
-    static unsigned int FUNCNAME##_arg_history_len = 50;\
+    static unsigned int FUNCNAME##_arg_history_len = FFF_ARG_HISTORY_LEN;\
     static unsigned int FUNCNAME##_arg_histories_dropped = 0; \
     void FUNCNAME(ARG0_TYPE arg0, ARG1_TYPE arg1, ARG2_TYPE arg2, ARG3_TYPE arg3, ARG4_TYPE arg4, ARG5_TYPE arg5){ \
         FUNCNAME##_arg0_val = arg0; \
@@ -1628,21 +1634,21 @@ static void RESET_HISTORY() {
 /* Defining a void function with 7 parameters*/
 #define FAKE_VOID_FUNC7(FUNCNAME, ARG0_TYPE, ARG1_TYPE, ARG2_TYPE, ARG3_TYPE, ARG4_TYPE, ARG5_TYPE, ARG6_TYPE) \
     static ARG0_TYPE FUNCNAME##_arg0_val; \
-    static ARG0_TYPE FUNCNAME##_arg0_history[50];\
+    static ARG0_TYPE FUNCNAME##_arg0_history[FFF_ARG_HISTORY_LEN];\
     static ARG1_TYPE FUNCNAME##_arg1_val; \
-    static ARG1_TYPE FUNCNAME##_arg1_history[50];\
+    static ARG1_TYPE FUNCNAME##_arg1_history[FFF_ARG_HISTORY_LEN];\
     static ARG2_TYPE FUNCNAME##_arg2_val; \
-    static ARG2_TYPE FUNCNAME##_arg2_history[50];\
+    static ARG2_TYPE FUNCNAME##_arg2_history[FFF_ARG_HISTORY_LEN];\
     static ARG3_TYPE FUNCNAME##_arg3_val; \
-    static ARG3_TYPE FUNCNAME##_arg3_history[50];\
+    static ARG3_TYPE FUNCNAME##_arg3_history[FFF_ARG_HISTORY_LEN];\
     static ARG4_TYPE FUNCNAME##_arg4_val; \
-    static ARG4_TYPE FUNCNAME##_arg4_history[50];\
+    static ARG4_TYPE FUNCNAME##_arg4_history[FFF_ARG_HISTORY_LEN];\
     static ARG5_TYPE FUNCNAME##_arg5_val; \
-    static ARG5_TYPE FUNCNAME##_arg5_history[50];\
+    static ARG5_TYPE FUNCNAME##_arg5_history[FFF_ARG_HISTORY_LEN];\
     static ARG6_TYPE FUNCNAME##_arg6_val; \
-    static ARG6_TYPE FUNCNAME##_arg6_history[50];\
+    static ARG6_TYPE FUNCNAME##_arg6_history[FFF_ARG_HISTORY_LEN];\
     static unsigned int FUNCNAME##_call_count = 0; \
-    static unsigned int FUNCNAME##_arg_history_len = 50;\
+    static unsigned int FUNCNAME##_arg_history_len = FFF_ARG_HISTORY_LEN;\
     static unsigned int FUNCNAME##_arg_histories_dropped = 0; \
     void FUNCNAME(ARG0_TYPE arg0, ARG1_TYPE arg1, ARG2_TYPE arg2, ARG3_TYPE arg3, ARG4_TYPE arg4, ARG5_TYPE arg5, ARG6_TYPE arg6){ \
         FUNCNAME##_arg0_val = arg0; \
@@ -1701,23 +1707,23 @@ static void RESET_HISTORY() {
 /* Defining a void function with 8 parameters*/
 #define FAKE_VOID_FUNC8(FUNCNAME, ARG0_TYPE, ARG1_TYPE, ARG2_TYPE, ARG3_TYPE, ARG4_TYPE, ARG5_TYPE, ARG6_TYPE, ARG7_TYPE) \
     static ARG0_TYPE FUNCNAME##_arg0_val; \
-    static ARG0_TYPE FUNCNAME##_arg0_history[50];\
+    static ARG0_TYPE FUNCNAME##_arg0_history[FFF_ARG_HISTORY_LEN];\
     static ARG1_TYPE FUNCNAME##_arg1_val; \
-    static ARG1_TYPE FUNCNAME##_arg1_history[50];\
+    static ARG1_TYPE FUNCNAME##_arg1_history[FFF_ARG_HISTORY_LEN];\
     static ARG2_TYPE FUNCNAME##_arg2_val; \
-    static ARG2_TYPE FUNCNAME##_arg2_history[50];\
+    static ARG2_TYPE FUNCNAME##_arg2_history[FFF_ARG_HISTORY_LEN];\
     static ARG3_TYPE FUNCNAME##_arg3_val; \
-    static ARG3_TYPE FUNCNAME##_arg3_history[50];\
+    static ARG3_TYPE FUNCNAME##_arg3_history[FFF_ARG_HISTORY_LEN];\
     static ARG4_TYPE FUNCNAME##_arg4_val; \
-    static ARG4_TYPE FUNCNAME##_arg4_history[50];\
+    static ARG4_TYPE FUNCNAME##_arg4_history[FFF_ARG_HISTORY_LEN];\
     static ARG5_TYPE FUNCNAME##_arg5_val; \
-    static ARG5_TYPE FUNCNAME##_arg5_history[50];\
+    static ARG5_TYPE FUNCNAME##_arg5_history[FFF_ARG_HISTORY_LEN];\
     static ARG6_TYPE FUNCNAME##_arg6_val; \
-    static ARG6_TYPE FUNCNAME##_arg6_history[50];\
+    static ARG6_TYPE FUNCNAME##_arg6_history[FFF_ARG_HISTORY_LEN];\
     static ARG7_TYPE FUNCNAME##_arg7_val; \
-    static ARG7_TYPE FUNCNAME##_arg7_history[50];\
+    static ARG7_TYPE FUNCNAME##_arg7_history[FFF_ARG_HISTORY_LEN];\
     static unsigned int FUNCNAME##_call_count = 0; \
-    static unsigned int FUNCNAME##_arg_history_len = 50;\
+    static unsigned int FUNCNAME##_arg_history_len = FFF_ARG_HISTORY_LEN;\
     static unsigned int FUNCNAME##_arg_histories_dropped = 0; \
     void FUNCNAME(ARG0_TYPE arg0, ARG1_TYPE arg1, ARG2_TYPE arg2, ARG3_TYPE arg3, ARG4_TYPE arg4, ARG5_TYPE arg5, ARG6_TYPE arg6, ARG7_TYPE arg7){ \
         FUNCNAME##_arg0_val = arg0; \
@@ -1782,25 +1788,25 @@ static void RESET_HISTORY() {
 /* Defining a void function with 9 parameters*/
 #define FAKE_VOID_FUNC9(FUNCNAME, ARG0_TYPE, ARG1_TYPE, ARG2_TYPE, ARG3_TYPE, ARG4_TYPE, ARG5_TYPE, ARG6_TYPE, ARG7_TYPE, ARG8_TYPE) \
     static ARG0_TYPE FUNCNAME##_arg0_val; \
-    static ARG0_TYPE FUNCNAME##_arg0_history[50];\
+    static ARG0_TYPE FUNCNAME##_arg0_history[FFF_ARG_HISTORY_LEN];\
     static ARG1_TYPE FUNCNAME##_arg1_val; \
-    static ARG1_TYPE FUNCNAME##_arg1_history[50];\
+    static ARG1_TYPE FUNCNAME##_arg1_history[FFF_ARG_HISTORY_LEN];\
     static ARG2_TYPE FUNCNAME##_arg2_val; \
-    static ARG2_TYPE FUNCNAME##_arg2_history[50];\
+    static ARG2_TYPE FUNCNAME##_arg2_history[FFF_ARG_HISTORY_LEN];\
     static ARG3_TYPE FUNCNAME##_arg3_val; \
-    static ARG3_TYPE FUNCNAME##_arg3_history[50];\
+    static ARG3_TYPE FUNCNAME##_arg3_history[FFF_ARG_HISTORY_LEN];\
     static ARG4_TYPE FUNCNAME##_arg4_val; \
-    static ARG4_TYPE FUNCNAME##_arg4_history[50];\
+    static ARG4_TYPE FUNCNAME##_arg4_history[FFF_ARG_HISTORY_LEN];\
     static ARG5_TYPE FUNCNAME##_arg5_val; \
-    static ARG5_TYPE FUNCNAME##_arg5_history[50];\
+    static ARG5_TYPE FUNCNAME##_arg5_history[FFF_ARG_HISTORY_LEN];\
     static ARG6_TYPE FUNCNAME##_arg6_val; \
-    static ARG6_TYPE FUNCNAME##_arg6_history[50];\
+    static ARG6_TYPE FUNCNAME##_arg6_history[FFF_ARG_HISTORY_LEN];\
     static ARG7_TYPE FUNCNAME##_arg7_val; \
-    static ARG7_TYPE FUNCNAME##_arg7_history[50];\
+    static ARG7_TYPE FUNCNAME##_arg7_history[FFF_ARG_HISTORY_LEN];\
     static ARG8_TYPE FUNCNAME##_arg8_val; \
-    static ARG8_TYPE FUNCNAME##_arg8_history[50];\
+    static ARG8_TYPE FUNCNAME##_arg8_history[FFF_ARG_HISTORY_LEN];\
     static unsigned int FUNCNAME##_call_count = 0; \
-    static unsigned int FUNCNAME##_arg_history_len = 50;\
+    static unsigned int FUNCNAME##_arg_history_len = FFF_ARG_HISTORY_LEN;\
     static unsigned int FUNCNAME##_arg_histories_dropped = 0; \
     void FUNCNAME(ARG0_TYPE arg0, ARG1_TYPE arg1, ARG2_TYPE arg2, ARG3_TYPE arg3, ARG4_TYPE arg4, ARG5_TYPE arg5, ARG6_TYPE arg6, ARG7_TYPE arg7, ARG8_TYPE arg8){ \
         FUNCNAME##_arg0_val = arg0; \
@@ -1875,7 +1881,7 @@ static void RESET_HISTORY() {
     static int FUNCNAME##_return_val_seq_idx = 0; \
     static RETURN_TYPE * FUNCNAME##_return_val_seq = 0; \
     static unsigned int FUNCNAME##_call_count = 0; \
-    static unsigned int FUNCNAME##_arg_history_len = 50;\
+    static unsigned int FUNCNAME##_arg_history_len = FFF_ARG_HISTORY_LEN;\
     static unsigned int FUNCNAME##_arg_histories_dropped = 0; \
     RETURN_TYPE FUNCNAME(){ \
         if(FUNCNAME##_call_count >= FUNCNAME##_arg_history_len){\
@@ -1903,13 +1909,13 @@ static void RESET_HISTORY() {
 /* Defining a function returning a value with 1 parameters*/
 #define FAKE_VALUE_FUNC1(RETURN_TYPE, FUNCNAME, ARG0_TYPE) \
     static ARG0_TYPE FUNCNAME##_arg0_val; \
-    static ARG0_TYPE FUNCNAME##_arg0_history[50];\
+    static ARG0_TYPE FUNCNAME##_arg0_history[FFF_ARG_HISTORY_LEN];\
     static RETURN_TYPE FUNCNAME##_return_val; \
     static int FUNCNAME##_return_val_seq_len = 0; \
     static int FUNCNAME##_return_val_seq_idx = 0; \
     static RETURN_TYPE * FUNCNAME##_return_val_seq = 0; \
     static unsigned int FUNCNAME##_call_count = 0; \
-    static unsigned int FUNCNAME##_arg_history_len = 50;\
+    static unsigned int FUNCNAME##_arg_history_len = FFF_ARG_HISTORY_LEN;\
     static unsigned int FUNCNAME##_arg_histories_dropped = 0; \
     RETURN_TYPE FUNCNAME(ARG0_TYPE arg0){ \
         FUNCNAME##_arg0_val = arg0; \
@@ -1943,15 +1949,15 @@ static void RESET_HISTORY() {
 /* Defining a function returning a value with 2 parameters*/
 #define FAKE_VALUE_FUNC2(RETURN_TYPE, FUNCNAME, ARG0_TYPE, ARG1_TYPE) \
     static ARG0_TYPE FUNCNAME##_arg0_val; \
-    static ARG0_TYPE FUNCNAME##_arg0_history[50];\
+    static ARG0_TYPE FUNCNAME##_arg0_history[FFF_ARG_HISTORY_LEN];\
     static ARG1_TYPE FUNCNAME##_arg1_val; \
-    static ARG1_TYPE FUNCNAME##_arg1_history[50];\
+    static ARG1_TYPE FUNCNAME##_arg1_history[FFF_ARG_HISTORY_LEN];\
     static RETURN_TYPE FUNCNAME##_return_val; \
     static int FUNCNAME##_return_val_seq_len = 0; \
     static int FUNCNAME##_return_val_seq_idx = 0; \
     static RETURN_TYPE * FUNCNAME##_return_val_seq = 0; \
     static unsigned int FUNCNAME##_call_count = 0; \
-    static unsigned int FUNCNAME##_arg_history_len = 50;\
+    static unsigned int FUNCNAME##_arg_history_len = FFF_ARG_HISTORY_LEN;\
     static unsigned int FUNCNAME##_arg_histories_dropped = 0; \
     RETURN_TYPE FUNCNAME(ARG0_TYPE arg0, ARG1_TYPE arg1){ \
         FUNCNAME##_arg0_val = arg0; \
@@ -1991,17 +1997,17 @@ static void RESET_HISTORY() {
 /* Defining a function returning a value with 3 parameters*/
 #define FAKE_VALUE_FUNC3(RETURN_TYPE, FUNCNAME, ARG0_TYPE, ARG1_TYPE, ARG2_TYPE) \
     static ARG0_TYPE FUNCNAME##_arg0_val; \
-    static ARG0_TYPE FUNCNAME##_arg0_history[50];\
+    static ARG0_TYPE FUNCNAME##_arg0_history[FFF_ARG_HISTORY_LEN];\
     static ARG1_TYPE FUNCNAME##_arg1_val; \
-    static ARG1_TYPE FUNCNAME##_arg1_history[50];\
+    static ARG1_TYPE FUNCNAME##_arg1_history[FFF_ARG_HISTORY_LEN];\
     static ARG2_TYPE FUNCNAME##_arg2_val; \
-    static ARG2_TYPE FUNCNAME##_arg2_history[50];\
+    static ARG2_TYPE FUNCNAME##_arg2_history[FFF_ARG_HISTORY_LEN];\
     static RETURN_TYPE FUNCNAME##_return_val; \
     static int FUNCNAME##_return_val_seq_len = 0; \
     static int FUNCNAME##_return_val_seq_idx = 0; \
     static RETURN_TYPE * FUNCNAME##_return_val_seq = 0; \
     static unsigned int FUNCNAME##_call_count = 0; \
-    static unsigned int FUNCNAME##_arg_history_len = 50;\
+    static unsigned int FUNCNAME##_arg_history_len = FFF_ARG_HISTORY_LEN;\
     static unsigned int FUNCNAME##_arg_histories_dropped = 0; \
     RETURN_TYPE FUNCNAME(ARG0_TYPE arg0, ARG1_TYPE arg1, ARG2_TYPE arg2){ \
         FUNCNAME##_arg0_val = arg0; \
@@ -2047,19 +2053,19 @@ static void RESET_HISTORY() {
 /* Defining a function returning a value with 4 parameters*/
 #define FAKE_VALUE_FUNC4(RETURN_TYPE, FUNCNAME, ARG0_TYPE, ARG1_TYPE, ARG2_TYPE, ARG3_TYPE) \
     static ARG0_TYPE FUNCNAME##_arg0_val; \
-    static ARG0_TYPE FUNCNAME##_arg0_history[50];\
+    static ARG0_TYPE FUNCNAME##_arg0_history[FFF_ARG_HISTORY_LEN];\
     static ARG1_TYPE FUNCNAME##_arg1_val; \
-    static ARG1_TYPE FUNCNAME##_arg1_history[50];\
+    static ARG1_TYPE FUNCNAME##_arg1_history[FFF_ARG_HISTORY_LEN];\
     static ARG2_TYPE FUNCNAME##_arg2_val; \
-    static ARG2_TYPE FUNCNAME##_arg2_history[50];\
+    static ARG2_TYPE FUNCNAME##_arg2_history[FFF_ARG_HISTORY_LEN];\
     static ARG3_TYPE FUNCNAME##_arg3_val; \
-    static ARG3_TYPE FUNCNAME##_arg3_history[50];\
+    static ARG3_TYPE FUNCNAME##_arg3_history[FFF_ARG_HISTORY_LEN];\
     static RETURN_TYPE FUNCNAME##_return_val; \
     static int FUNCNAME##_return_val_seq_len = 0; \
     static int FUNCNAME##_return_val_seq_idx = 0; \
     static RETURN_TYPE * FUNCNAME##_return_val_seq = 0; \
     static unsigned int FUNCNAME##_call_count = 0; \
-    static unsigned int FUNCNAME##_arg_history_len = 50;\
+    static unsigned int FUNCNAME##_arg_history_len = FFF_ARG_HISTORY_LEN;\
     static unsigned int FUNCNAME##_arg_histories_dropped = 0; \
     RETURN_TYPE FUNCNAME(ARG0_TYPE arg0, ARG1_TYPE arg1, ARG2_TYPE arg2, ARG3_TYPE arg3){ \
         FUNCNAME##_arg0_val = arg0; \
@@ -2111,21 +2117,21 @@ static void RESET_HISTORY() {
 /* Defining a function returning a value with 5 parameters*/
 #define FAKE_VALUE_FUNC5(RETURN_TYPE, FUNCNAME, ARG0_TYPE, ARG1_TYPE, ARG2_TYPE, ARG3_TYPE, ARG4_TYPE) \
     static ARG0_TYPE FUNCNAME##_arg0_val; \
-    static ARG0_TYPE FUNCNAME##_arg0_history[50];\
+    static ARG0_TYPE FUNCNAME##_arg0_history[FFF_ARG_HISTORY_LEN];\
     static ARG1_TYPE FUNCNAME##_arg1_val; \
-    static ARG1_TYPE FUNCNAME##_arg1_history[50];\
+    static ARG1_TYPE FUNCNAME##_arg1_history[FFF_ARG_HISTORY_LEN];\
     static ARG2_TYPE FUNCNAME##_arg2_val; \
-    static ARG2_TYPE FUNCNAME##_arg2_history[50];\
+    static ARG2_TYPE FUNCNAME##_arg2_history[FFF_ARG_HISTORY_LEN];\
     static ARG3_TYPE FUNCNAME##_arg3_val; \
-    static ARG3_TYPE FUNCNAME##_arg3_history[50];\
+    static ARG3_TYPE FUNCNAME##_arg3_history[FFF_ARG_HISTORY_LEN];\
     static ARG4_TYPE FUNCNAME##_arg4_val; \
-    static ARG4_TYPE FUNCNAME##_arg4_history[50];\
+    static ARG4_TYPE FUNCNAME##_arg4_history[FFF_ARG_HISTORY_LEN];\
     static RETURN_TYPE FUNCNAME##_return_val; \
     static int FUNCNAME##_return_val_seq_len = 0; \
     static int FUNCNAME##_return_val_seq_idx = 0; \
     static RETURN_TYPE * FUNCNAME##_return_val_seq = 0; \
     static unsigned int FUNCNAME##_call_count = 0; \
-    static unsigned int FUNCNAME##_arg_history_len = 50;\
+    static unsigned int FUNCNAME##_arg_history_len = FFF_ARG_HISTORY_LEN;\
     static unsigned int FUNCNAME##_arg_histories_dropped = 0; \
     RETURN_TYPE FUNCNAME(ARG0_TYPE arg0, ARG1_TYPE arg1, ARG2_TYPE arg2, ARG3_TYPE arg3, ARG4_TYPE arg4){ \
         FUNCNAME##_arg0_val = arg0; \
@@ -2183,23 +2189,23 @@ static void RESET_HISTORY() {
 /* Defining a function returning a value with 6 parameters*/
 #define FAKE_VALUE_FUNC6(RETURN_TYPE, FUNCNAME, ARG0_TYPE, ARG1_TYPE, ARG2_TYPE, ARG3_TYPE, ARG4_TYPE, ARG5_TYPE) \
     static ARG0_TYPE FUNCNAME##_arg0_val; \
-    static ARG0_TYPE FUNCNAME##_arg0_history[50];\
+    static ARG0_TYPE FUNCNAME##_arg0_history[FFF_ARG_HISTORY_LEN];\
     static ARG1_TYPE FUNCNAME##_arg1_val; \
-    static ARG1_TYPE FUNCNAME##_arg1_history[50];\
+    static ARG1_TYPE FUNCNAME##_arg1_history[FFF_ARG_HISTORY_LEN];\
     static ARG2_TYPE FUNCNAME##_arg2_val; \
-    static ARG2_TYPE FUNCNAME##_arg2_history[50];\
+    static ARG2_TYPE FUNCNAME##_arg2_history[FFF_ARG_HISTORY_LEN];\
     static ARG3_TYPE FUNCNAME##_arg3_val; \
-    static ARG3_TYPE FUNCNAME##_arg3_history[50];\
+    static ARG3_TYPE FUNCNAME##_arg3_history[FFF_ARG_HISTORY_LEN];\
     static ARG4_TYPE FUNCNAME##_arg4_val; \
-    static ARG4_TYPE FUNCNAME##_arg4_history[50];\
+    static ARG4_TYPE FUNCNAME##_arg4_history[FFF_ARG_HISTORY_LEN];\
     static ARG5_TYPE FUNCNAME##_arg5_val; \
-    static ARG5_TYPE FUNCNAME##_arg5_history[50];\
+    static ARG5_TYPE FUNCNAME##_arg5_history[FFF_ARG_HISTORY_LEN];\
     static RETURN_TYPE FUNCNAME##_return_val; \
     static int FUNCNAME##_return_val_seq_len = 0; \
     static int FUNCNAME##_return_val_seq_idx = 0; \
     static RETURN_TYPE * FUNCNAME##_return_val_seq = 0; \
     static unsigned int FUNCNAME##_call_count = 0; \
-    static unsigned int FUNCNAME##_arg_history_len = 50;\
+    static unsigned int FUNCNAME##_arg_history_len = FFF_ARG_HISTORY_LEN;\
     static unsigned int FUNCNAME##_arg_histories_dropped = 0; \
     RETURN_TYPE FUNCNAME(ARG0_TYPE arg0, ARG1_TYPE arg1, ARG2_TYPE arg2, ARG3_TYPE arg3, ARG4_TYPE arg4, ARG5_TYPE arg5){ \
         FUNCNAME##_arg0_val = arg0; \
@@ -2263,25 +2269,25 @@ static void RESET_HISTORY() {
 /* Defining a function returning a value with 7 parameters*/
 #define FAKE_VALUE_FUNC7(RETURN_TYPE, FUNCNAME, ARG0_TYPE, ARG1_TYPE, ARG2_TYPE, ARG3_TYPE, ARG4_TYPE, ARG5_TYPE, ARG6_TYPE) \
     static ARG0_TYPE FUNCNAME##_arg0_val; \
-    static ARG0_TYPE FUNCNAME##_arg0_history[50];\
+    static ARG0_TYPE FUNCNAME##_arg0_history[FFF_ARG_HISTORY_LEN];\
     static ARG1_TYPE FUNCNAME##_arg1_val; \
-    static ARG1_TYPE FUNCNAME##_arg1_history[50];\
+    static ARG1_TYPE FUNCNAME##_arg1_history[FFF_ARG_HISTORY_LEN];\
     static ARG2_TYPE FUNCNAME##_arg2_val; \
-    static ARG2_TYPE FUNCNAME##_arg2_history[50];\
+    static ARG2_TYPE FUNCNAME##_arg2_history[FFF_ARG_HISTORY_LEN];\
     static ARG3_TYPE FUNCNAME##_arg3_val; \
-    static ARG3_TYPE FUNCNAME##_arg3_history[50];\
+    static ARG3_TYPE FUNCNAME##_arg3_history[FFF_ARG_HISTORY_LEN];\
     static ARG4_TYPE FUNCNAME##_arg4_val; \
-    static ARG4_TYPE FUNCNAME##_arg4_history[50];\
+    static ARG4_TYPE FUNCNAME##_arg4_history[FFF_ARG_HISTORY_LEN];\
     static ARG5_TYPE FUNCNAME##_arg5_val; \
-    static ARG5_TYPE FUNCNAME##_arg5_history[50];\
+    static ARG5_TYPE FUNCNAME##_arg5_history[FFF_ARG_HISTORY_LEN];\
     static ARG6_TYPE FUNCNAME##_arg6_val; \
-    static ARG6_TYPE FUNCNAME##_arg6_history[50];\
+    static ARG6_TYPE FUNCNAME##_arg6_history[FFF_ARG_HISTORY_LEN];\
     static RETURN_TYPE FUNCNAME##_return_val; \
     static int FUNCNAME##_return_val_seq_len = 0; \
     static int FUNCNAME##_return_val_seq_idx = 0; \
     static RETURN_TYPE * FUNCNAME##_return_val_seq = 0; \
     static unsigned int FUNCNAME##_call_count = 0; \
-    static unsigned int FUNCNAME##_arg_history_len = 50;\
+    static unsigned int FUNCNAME##_arg_history_len = FFF_ARG_HISTORY_LEN;\
     static unsigned int FUNCNAME##_arg_histories_dropped = 0; \
     RETURN_TYPE FUNCNAME(ARG0_TYPE arg0, ARG1_TYPE arg1, ARG2_TYPE arg2, ARG3_TYPE arg3, ARG4_TYPE arg4, ARG5_TYPE arg5, ARG6_TYPE arg6){ \
         FUNCNAME##_arg0_val = arg0; \
@@ -2351,27 +2357,27 @@ static void RESET_HISTORY() {
 /* Defining a function returning a value with 8 parameters*/
 #define FAKE_VALUE_FUNC8(RETURN_TYPE, FUNCNAME, ARG0_TYPE, ARG1_TYPE, ARG2_TYPE, ARG3_TYPE, ARG4_TYPE, ARG5_TYPE, ARG6_TYPE, ARG7_TYPE) \
     static ARG0_TYPE FUNCNAME##_arg0_val; \
-    static ARG0_TYPE FUNCNAME##_arg0_history[50];\
+    static ARG0_TYPE FUNCNAME##_arg0_history[FFF_ARG_HISTORY_LEN];\
     static ARG1_TYPE FUNCNAME##_arg1_val; \
-    static ARG1_TYPE FUNCNAME##_arg1_history[50];\
+    static ARG1_TYPE FUNCNAME##_arg1_history[FFF_ARG_HISTORY_LEN];\
     static ARG2_TYPE FUNCNAME##_arg2_val; \
-    static ARG2_TYPE FUNCNAME##_arg2_history[50];\
+    static ARG2_TYPE FUNCNAME##_arg2_history[FFF_ARG_HISTORY_LEN];\
     static ARG3_TYPE FUNCNAME##_arg3_val; \
-    static ARG3_TYPE FUNCNAME##_arg3_history[50];\
+    static ARG3_TYPE FUNCNAME##_arg3_history[FFF_ARG_HISTORY_LEN];\
     static ARG4_TYPE FUNCNAME##_arg4_val; \
-    static ARG4_TYPE FUNCNAME##_arg4_history[50];\
+    static ARG4_TYPE FUNCNAME##_arg4_history[FFF_ARG_HISTORY_LEN];\
     static ARG5_TYPE FUNCNAME##_arg5_val; \
-    static ARG5_TYPE FUNCNAME##_arg5_history[50];\
+    static ARG5_TYPE FUNCNAME##_arg5_history[FFF_ARG_HISTORY_LEN];\
     static ARG6_TYPE FUNCNAME##_arg6_val; \
-    static ARG6_TYPE FUNCNAME##_arg6_history[50];\
+    static ARG6_TYPE FUNCNAME##_arg6_history[FFF_ARG_HISTORY_LEN];\
     static ARG7_TYPE FUNCNAME##_arg7_val; \
-    static ARG7_TYPE FUNCNAME##_arg7_history[50];\
+    static ARG7_TYPE FUNCNAME##_arg7_history[FFF_ARG_HISTORY_LEN];\
     static RETURN_TYPE FUNCNAME##_return_val; \
     static int FUNCNAME##_return_val_seq_len = 0; \
     static int FUNCNAME##_return_val_seq_idx = 0; \
     static RETURN_TYPE * FUNCNAME##_return_val_seq = 0; \
     static unsigned int FUNCNAME##_call_count = 0; \
-    static unsigned int FUNCNAME##_arg_history_len = 50;\
+    static unsigned int FUNCNAME##_arg_history_len = FFF_ARG_HISTORY_LEN;\
     static unsigned int FUNCNAME##_arg_histories_dropped = 0; \
     RETURN_TYPE FUNCNAME(ARG0_TYPE arg0, ARG1_TYPE arg1, ARG2_TYPE arg2, ARG3_TYPE arg3, ARG4_TYPE arg4, ARG5_TYPE arg5, ARG6_TYPE arg6, ARG7_TYPE arg7){ \
         FUNCNAME##_arg0_val = arg0; \
@@ -2447,29 +2453,29 @@ static void RESET_HISTORY() {
 /* Defining a function returning a value with 9 parameters*/
 #define FAKE_VALUE_FUNC9(RETURN_TYPE, FUNCNAME, ARG0_TYPE, ARG1_TYPE, ARG2_TYPE, ARG3_TYPE, ARG4_TYPE, ARG5_TYPE, ARG6_TYPE, ARG7_TYPE, ARG8_TYPE) \
     static ARG0_TYPE FUNCNAME##_arg0_val; \
-    static ARG0_TYPE FUNCNAME##_arg0_history[50];\
+    static ARG0_TYPE FUNCNAME##_arg0_history[FFF_ARG_HISTORY_LEN];\
     static ARG1_TYPE FUNCNAME##_arg1_val; \
-    static ARG1_TYPE FUNCNAME##_arg1_history[50];\
+    static ARG1_TYPE FUNCNAME##_arg1_history[FFF_ARG_HISTORY_LEN];\
     static ARG2_TYPE FUNCNAME##_arg2_val; \
-    static ARG2_TYPE FUNCNAME##_arg2_history[50];\
+    static ARG2_TYPE FUNCNAME##_arg2_history[FFF_ARG_HISTORY_LEN];\
     static ARG3_TYPE FUNCNAME##_arg3_val; \
-    static ARG3_TYPE FUNCNAME##_arg3_history[50];\
+    static ARG3_TYPE FUNCNAME##_arg3_history[FFF_ARG_HISTORY_LEN];\
     static ARG4_TYPE FUNCNAME##_arg4_val; \
-    static ARG4_TYPE FUNCNAME##_arg4_history[50];\
+    static ARG4_TYPE FUNCNAME##_arg4_history[FFF_ARG_HISTORY_LEN];\
     static ARG5_TYPE FUNCNAME##_arg5_val; \
-    static ARG5_TYPE FUNCNAME##_arg5_history[50];\
+    static ARG5_TYPE FUNCNAME##_arg5_history[FFF_ARG_HISTORY_LEN];\
     static ARG6_TYPE FUNCNAME##_arg6_val; \
-    static ARG6_TYPE FUNCNAME##_arg6_history[50];\
+    static ARG6_TYPE FUNCNAME##_arg6_history[FFF_ARG_HISTORY_LEN];\
     static ARG7_TYPE FUNCNAME##_arg7_val; \
-    static ARG7_TYPE FUNCNAME##_arg7_history[50];\
+    static ARG7_TYPE FUNCNAME##_arg7_history[FFF_ARG_HISTORY_LEN];\
     static ARG8_TYPE FUNCNAME##_arg8_val; \
-    static ARG8_TYPE FUNCNAME##_arg8_history[50];\
+    static ARG8_TYPE FUNCNAME##_arg8_history[FFF_ARG_HISTORY_LEN];\
     static RETURN_TYPE FUNCNAME##_return_val; \
     static int FUNCNAME##_return_val_seq_len = 0; \
     static int FUNCNAME##_return_val_seq_idx = 0; \
     static RETURN_TYPE * FUNCNAME##_return_val_seq = 0; \
     static unsigned int FUNCNAME##_call_count = 0; \
-    static unsigned int FUNCNAME##_arg_history_len = 50;\
+    static unsigned int FUNCNAME##_arg_history_len = FFF_ARG_HISTORY_LEN;\
     static unsigned int FUNCNAME##_arg_histories_dropped = 0; \
     RETURN_TYPE FUNCNAME(ARG0_TYPE arg0, ARG1_TYPE arg1, ARG2_TYPE arg2, ARG3_TYPE arg3, ARG4_TYPE arg4, ARG5_TYPE arg5, ARG6_TYPE arg6, ARG7_TYPE arg7, ARG8_TYPE arg8){ \
         FUNCNAME##_arg0_val = arg0; \
diff --git a/test/fff_test_c.c b/test/fff_test_c.c
index cb7f18f..0519d27 100644
--- a/test/fff_test_c.c
+++ b/test/fff_test_c.c
@@ -1,3 +1,11 @@
+
+// Want to keep the argument history for 13 calls
+#define OVERRIDE_ARG_HIST_LEN 13u
+#define FFF_ARG_HISTORY_LEN OVERRIDE_ARG_HIST_LEN
+// Want to keep the call sequence history for 17 function calls
+#define OVERRIDE_CALL_HIST_LEN 17u
+#define FFF_CALL_HISTORY_LEN OVERRIDE_CALL_HIST_LEN
+
 #include "../fff.h"
 
 #include <assert.h>
@@ -239,6 +247,12 @@ TEST_F(FFFTestSuite, return_value_sequences_reset)
     ASSERT_EQ(0, longfunc0());
 }
 
+TEST_F(FFFTestSuite, default_constants_can_be_overridden)
+{
+    unsigned sizeCallHistory = (sizeof call_history) / (sizeof call_history[0]);
+    ASSERT_EQ(OVERRIDE_CALL_HIST_LEN, sizeCallHistory);
+    ASSERT_EQ(OVERRIDE_ARG_HIST_LEN, voidfunc2_arg_history_len);
+}
 
 int main()
 {
@@ -276,6 +290,7 @@ int main()
 
     RUN_TEST(FFFTestSuite, return_value_sequences_not_exhausted);
     RUN_TEST(FFFTestSuite, return_value_sequences_exhausted);
+    RUN_TEST(FFFTestSuite, default_constants_can_be_overridden);
 
     printf("\n-------------\n");
     printf("Complete\n");
diff --git a/test/fff_test_cpp.cpp b/test/fff_test_cpp.cpp
index c2dcd71..f4ced16 100644
--- a/test/fff_test_cpp.cpp
+++ b/test/fff_test_cpp.cpp
@@ -5,6 +5,13 @@
  *      Author: mlong
  */
 
+// Want to keep the argument history for 13 calls
+#define OVERRIDE_ARG_HIST_LEN 13u
+#define FFF_ARG_HISTORY_LEN OVERRIDE_ARG_HIST_LEN
+// Want to keep the call sequence history for 17 function calls
+#define OVERRIDE_CALL_HIST_LEN 17u
+#define FFF_CALL_HISTORY_LEN OVERRIDE_CALL_HIST_LEN
+
 #include "../fff.h"
 #include <gtest/gtest.h>
 
@@ -227,3 +234,11 @@ TEST_F(FFFTestSuite, return_value_sequences_reset)
     ASSERT_EQ(0, longfunc0());
 }
 
+
+TEST_F(FFFTestSuite, default_constants_can_be_overridden)
+{
+    unsigned sizeCallHistory = (sizeof call_history) / (sizeof call_history[0]);
+    ASSERT_EQ(OVERRIDE_CALL_HIST_LEN, sizeCallHistory);
+    ASSERT_EQ(OVERRIDE_ARG_HIST_LEN, voidfunc2_arg_history_len);
+}
+