Merge pull request #982 from monaka/pr-make-MRB_STR_BUF_MIN_SIZE-configurable

Rename STR_BUF_MIN_SIZE to MRB_STR_BUF_MIN_SIZE. Make it configurable.

include/mrbconf.h

@@ -46,6 +46,10 @@
 /* page size of memory pool */
 //#define POOL_PAGE_SIZE 16000
 
+/* initial minimum size for string buffer */
+//#define MRB_STR_BUF_MIN_SIZE 128
+
+
 /* -DDISABLE_XXXX to drop following features */
 //#define DISABLE_STDIO		/* use of stdio */
 

include/mruby/string.h

@@ -13,8 +13,6 @@ extern "C" {
 
 #define IS_EVSTR(p,e) ((p) < (e) && (*(p) == '$' || *(p) == '@' || *(p) == '{'))
 
-#define STR_BUF_MIN_SIZE 128
-
 extern const char mrb_digitmap[];
 
 typedef struct mrb_shared_string {