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+/*
+** mrbconf.h - mruby core configuration
+**
+** See Copyright Notice in mruby.h
+*/
+
+#ifndef MRUBYCONF_H
+#define MRUBYCONF_H
+
+#include <limits.h>
+#include <stdint.h>
+
+/* architecture selection: */
+/* specify -DMRB_32BIT or -DMRB_64BIT to override */
+#if !defined(MRB_32BIT) && !defined(MRB_64BIT)
+#if UINT64_MAX == SIZE_MAX
+#define MRB_64BIT
+#else
+#define MRB_32BIT
+#endif
+#endif
+
+#if defined(MRB_32BIT) && defined(MRB_64BIT)
+#error Cannot build for 32 and 64 bit architecture at the same time
+#endif
+
+/* configuration options: */
+/* add -DMRB_USE_FLOAT to use float instead of double for floating point numbers */
+//#define MRB_USE_FLOAT
+
+/* exclude floating point numbers */
+//#define MRB_WITHOUT_FLOAT
+
+/* add -DMRB_METHOD_CACHE to use method cache to improve performance */
+//#define MRB_METHOD_CACHE
+/* size of the method cache (need to be the power of 2) */
+//#define MRB_METHOD_CACHE_SIZE (1<<7)
+
+/* add -DMRB_METHOD_T_STRUCT on machines that use higher bits of pointers */
+/* no MRB_METHOD_T_STRUCT requires highest 2 bits of function pointers to be zero */
+#ifndef MRB_METHOD_T_STRUCT
+  // can't use highest 2 bits of function pointers at least on 32bit
+  // Windows and 32bit Linux.
+# ifdef MRB_32BIT
+#   define MRB_METHOD_T_STRUCT
+# endif
+#endif
+
+/* add -DMRB_INT32 to use 32bit integer for mrb_int; conflict with MRB_INT64;
+   Default for 32-bit CPU mode. */
+//#define MRB_INT32
+
+/* add -DMRB_INT64 to use 64bit integer for mrb_int; conflict with MRB_INT32;
+   Default for 64-bit CPU mode. */
+//#define MRB_INT64
+
+/* if no specific integer type is chosen */
+#if !defined(MRB_INT32) && !defined(MRB_INT64)
+# if defined(MRB_64BIT) && !defined(MRB_NAN_BOXING)
+/* Use 64bit integers on 64bit architecture (without MRB_NAN_BOXING) */
+#  define MRB_INT64
+# else
+/* Otherwise use 32bit integers */
+#  define MRB_INT32
+# endif
+#endif
+
+/* define on big endian machines; used by MRB_NAN_BOXING, etc. */
+#ifndef MRB_ENDIAN_BIG
+# if (defined(BYTE_ORDER) && defined(BIG_ENDIAN) && BYTE_ORDER == BIG_ENDIAN) || \
+     (defined(__BYTE_ORDER__) && defined(__ORDER_BIG_ENDIAN__) && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__)
+#  define MRB_ENDIAN_BIG
+# endif
+#endif
+
+/* represent mrb_value in boxed double; conflict with MRB_USE_FLOAT and MRB_WITHOUT_FLOAT */
+//#define MRB_NAN_BOXING
+
+/* represent mrb_value as a word (natural unit of data for the processor) */
+//#define MRB_WORD_BOXING
+
+/* string class to handle UTF-8 encoding */
+//#define MRB_UTF8_STRING
+
+/* argv max size in mrb_funcall */
+//#define MRB_FUNCALL_ARGC_MAX 16
+
+/* number of object per heap page */
+//#define MRB_HEAP_PAGE_SIZE 1024
+
+/* if __ehdr_start is available, mruby can reduce memory used by symbols */
+//#define MRB_USE_LINK_TIME_RO_DATA_P
+
+/* if MRB_USE_LINK_TIME_RO_DATA_P does not work,
+   you can try mrb_ro_data_p() that you have implemented yourself in any file;
+   prototype is `mrb_bool mrb_ro_data_p(const char *ptr)` */
+//#define MRB_USE_CUSTOM_RO_DATA_P
+
+/* turn off generational GC by default */
+//#define MRB_GC_TURN_OFF_GENERATIONAL
+
+/* default size of khash table bucket */
+//#define KHASH_DEFAULT_SIZE 32
+
+/* allocated memory address alignment */
+//#define POOL_ALIGNMENT 4
+
+/* page size of memory pool */
+//#define POOL_PAGE_SIZE 16000
+
+/* initial minimum size for string buffer */
+//#define MRB_STR_BUF_MIN_SIZE 128
+
+/* arena size */
+//#define MRB_GC_ARENA_SIZE 100
+
+/* fixed size GC arena */
+//#define MRB_GC_FIXED_ARENA
+
+/* state atexit stack size */
+//#define MRB_FIXED_STATE_ATEXIT_STACK_SIZE 5
+
+/* fixed size state atexit stack */
+//#define MRB_FIXED_STATE_ATEXIT_STACK
+
+/* -DMRB_DISABLE_XXXX to drop following features */
+//#define MRB_DISABLE_STDIO /* use of stdio */
+
+/* -DMRB_ENABLE_XXXX to enable following features */
+//#define MRB_ENABLE_DEBUG_HOOK /* hooks for debugger */
+//#define MRB_ENABLE_ALL_SYMBOLS /* Symbols.all_symbols */
+
+/* end of configuration */
+
+/* define MRB_DISABLE_XXXX from DISABLE_XXX (for compatibility) */
+#ifdef DISABLE_STDIO
+#define MRB_DISABLE_STDIO
+#endif
+
+/* define MRB_ENABLE_XXXX from ENABLE_XXX (for compatibility) */
+#ifdef ENABLE_DEBUG
+#define MRB_ENABLE_DEBUG_HOOK
+#endif
+
+#ifndef MRB_DISABLE_STDIO
+# include <stdio.h>
+#endif
+
+#ifndef FALSE
+# define FALSE 0
+#endif
+
+#ifndef TRUE
+# define TRUE 1
+#endif
+
+/*
+** mruby tuning profiles
+**/
+
+/* A profile for micro controllers */
+#if defined(MRB_CONSTRAINED_BASELINE_PROFILE)
+# ifndef KHASH_DEFAULT_SIZE
+#  define KHASH_DEFAULT_SIZE 16
+# endif
+
+# ifndef MRB_STR_BUF_MIN_SIZE
+#  define MRB_STR_BUF_MIN_SIZE 32
+# endif
+
+# ifndef MRB_HEAP_PAGE_SIZE
+#  define MRB_HEAP_PAGE_SIZE 256
+# endif
+
+/* A profile for default mruby */
+#elif defined(MRB_BASELINE_PROFILE)
+
+/* A profile for desktop computers or workstations; rich memory! */
+#elif defined(MRB_MAIN_PROFILE)
+# ifndef MRB_METHOD_CACHE
+#  define MRB_METHOD_CACHE
+# endif
+
+# ifndef MRB_METHOD_CACHE_SIZE
+#  define MRB_METHOD_CACHE_SIZE (1<<10)
+# endif
+
+# ifndef MRB_IV_SEGMENT_SIZE
+#  define MRB_IV_SEGMENT_SIZE 32
+# endif
+
+# ifndef MRB_HEAP_PAGE_SIZE
+#  define MRB_HEAP_PAGE_SIZE 4096
+# endif
+
+/* A profile for server; mruby vm is long life */
+#elif defined(MRB_HIGH_PROFILE)
+# ifndef MRB_METHOD_CACHE
+#  define MRB_METHOD_CACHE
+# endif
+
+# ifndef MRB_METHOD_CACHE_SIZE
+#  define MRB_METHOD_CACHE_SIZE (1<<12)
+# endif
+
+# ifndef MRB_IV_SEGMENT_SIZE
+#  define MRB_IV_SEGMENT_SIZE 64
+# endif
+
+# ifndef MRB_HEAP_PAGE_SIZE
+#  define MRB_HEAP_PAGE_SIZE 4096
+# endif
+#endif
+
+#endif  /* MRUBYCONF_H */