/*
  Io buffer size; Must be a power of 2 and a multiple of 512. May be
  smaller what the disk page size. This influences the speed of the
  isam btree library. eg to big to slow.
*/
#define IO_SIZE			4096
/*
  How much overhead does malloc have. The code often allocates
  something like 1024-MALLOC_OVERHEAD bytes
*/
#ifdef SAFEMALLOC
#define MALLOC_OVERHEAD (8+24+4)
#else
#define MALLOC_OVERHEAD 8
#endif
	/* get memory in huncs */
#define ONCE_ALLOC_INIT		(uint) (4096-MALLOC_OVERHEAD)
	/* Typical record cash */
#define RECORD_CACHE_SIZE	(uint) (64*1024-MALLOC_OVERHEAD)
	/* Typical key cash */
#define KEY_CACHE_SIZE		(uint) (8*1024*1024-MALLOC_OVERHEAD)
	/* Default size of a key cache block  */
#define KEY_CACHE_BLOCK_SIZE	(uint) 1024


	/* Some things that this system doesn't have */

#define NO_HASH			/* Not needed anymore */
#ifdef __WIN__
#define NO_DIR_LIBRARY		/* Not standar dir-library */
#define USE_MY_STAT_STRUCT	/* For my_lib */
#endif

/* Some defines of functions for portability */

#undef remove		/* Crashes MySQL on SCO 5.0.0 */
#ifndef __WIN__
#define closesocket(A)	close(A)
#ifndef ulonglong2double
#define ulonglong2double(A) ((double) (ulonglong) (A))
#define my_off_t2double(A)  ((double) (my_off_t) (A))
#endif
#endif

#ifndef offsetof
#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
#endif
#define ulong_to_double(X) ((double) (ulong) (X))
#define SET_STACK_SIZE(X)	/* Not needed on real machines */

#ifndef STACK_DIRECTION
#error "please add -DSTACK_DIRECTION=1 or -1 to your CPPFLAGS"
#endif

#if !defined(HAVE_STRTOK_R)
#define strtok_r(A,B,C) strtok((A),(B))
#endif

/* This is from the old m-machine.h file */

#if SIZEOF_LONG_LONG > 4
#define HAVE_LONG_LONG 1
#endif

/*
  Some pre-ANSI-C99 systems like AIX 5.1 and Linux/GCC 2.95 define
  ULONGLONG_MAX, LONGLONG_MIN, LONGLONG_MAX; we use them if they're defined.
  Also on Windows we define these constants by hand in config-win.h.
*/

#if defined(HAVE_LONG_LONG) && !defined(LONGLONG_MIN)
#define LONGLONG_MIN	((long long) 0x8000000000000000LL)
#define LONGLONG_MAX	((long long) 0x7FFFFFFFFFFFFFFFLL)
#endif

#if defined(HAVE_LONG_LONG) && !defined(ULONGLONG_MAX)
/* First check for ANSI C99 definition: */
#ifdef ULLONG_MAX
#define ULONGLONG_MAX  ULLONG_MAX
#else
#define ULONGLONG_MAX ((unsigned long long)(~0ULL))
#endif
#endif /* defined (HAVE_LONG_LONG) && !defined(ULONGLONG_MAX)*/

#define INT_MIN32       (~0x7FFFFFFFL)
#define INT_MAX32       0x7FFFFFFFL
#define UINT_MAX32      0xFFFFFFFFL
#define INT_MIN24       (~0x007FFFFF)
#define INT_MAX24       0x007FFFFF
#define UINT_MAX24      0x00FFFFFF
#define INT_MIN16       (~0x7FFF)
#define INT_MAX16       0x7FFF
#define UINT_MAX16      0xFFFF
#define INT_MIN8        (~0x7F)
#define INT_MAX8        0x7F
#define UINT_MAX8       0xFF

/* From limits.h instead */
#ifndef DBL_MIN
#define DBL_MIN		4.94065645841246544e-324
#define FLT_MIN		((float)1.40129846432481707e-45)
#endif
#ifndef DBL_MAX
#define DBL_MAX		1.79769313486231470e+308
#define FLT_MAX		((float)3.40282346638528860e+38)
#endif
#ifndef SSIZE_MAX
#define SSIZE_MAX ((~((size_t) 0)) / 2)
#endif

#ifndef HAVE_FINITE
#define finite(x) (1.0 / fabs(x) > 0.0)
#endif

#ifndef HAVE_ISNAN
#define isnan(x) ((x) != (x))
#endif

#ifdef HAVE_ISINF
/* isinf() can be used in both C and C++ code */
#define my_isinf(X) isinf(X)
#else
#define my_isinf(X) (!finite(X) && !isnan(X))
#endif

/* Define missing math constants. */
#ifndef M_PI
#define M_PI 3.14159265358979323846
#endif
#ifndef M_E
#define M_E 2.7182818284590452354
#endif
#ifndef M_LN2
#define M_LN2 0.69314718055994530942
#endif

/*
  Max size that must be added to a so that we know Size to make
  adressable obj.
*/
#if SIZEOF_CHARP == 4
typedef long		my_ptrdiff_t;
#else
typedef long long	my_ptrdiff_t;
#endif

#define MY_ALIGN(A,L)	(((A) + (L) - 1) & ~((L) - 1))
#define ALIGN_SIZE(A)	MY_ALIGN((A),sizeof(double))
/* Size to make adressable obj. */
#define ALIGN_PTR(A, t) ((t*) MY_ALIGN((A),sizeof(t)))
			 /* Offset of field f in structure t */
#define OFFSET(t, f)	((size_t)(char *)&((t *)0)->f)
#define ADD_TO_PTR(ptr,size,type) (type) ((uchar*) (ptr)+size)
#define PTR_BYTE_DIFF(A,B) (my_ptrdiff_t) ((uchar*) (A) - (uchar*) (B))

#define MY_DIV_UP(A, B) (((A) + (B) - 1) / (B))
#define MY_ALIGNED_BYTE_ARRAY(N, S, T) T N[MY_DIV_UP(S, sizeof(T))]

/*
  Custom version of standard offsetof() macro which can be used to get
  offsets of members in class for non-POD types (according to the current
  version of C++ standard offsetof() macro can't be used in such cases and
  attempt to do so causes warnings to be emitted, OTOH in many cases it is
  still OK to assume that all instances of the class has the same offsets
  for the same members).

  This is temporary solution which should be removed once File_parser class
  and related routines are refactored.
*/

#define my_offsetof(TYPE, MEMBER) \
        ((size_t)((char *)&(((TYPE *)0x10)->MEMBER) - (char*)0x10))

#define NullS		(char *) 0
/* Nowdays we do not support MessyDos */
#ifndef NEAR
#define NEAR				/* Who needs segments ? */
#define FAR				/* On a good machine */
#ifndef HUGE_PTR
#define HUGE_PTR
#endif
#endif
#if defined(__IBMC__) || defined(__IBMCPP__)
/* This was  _System _Export but caused a lot of warnings on _AIX43 */
#define STDCALL
#elif !defined( STDCALL)
#define STDCALL
#endif

/* Typdefs for easyier portability */

#ifndef HAVE_UCHAR
typedef unsigned char	uchar;	/* Short for unsigned char */
#endif

#ifndef HAVE_INT8
typedef signed char int8;       /* Signed integer >= 8  bits */
#endif
#ifndef HAVE_UINT8
typedef unsigned char uint8;    /* Unsigned integer >= 8  bits */
#endif
#ifndef HAVE_INT16
typedef short int16;
#endif
#ifndef HAVE_UINT16
typedef unsigned short uint16;
#endif
#if SIZEOF_INT == 4
#ifndef HAVE_INT32
typedef int int32;
#endif
#ifndef HAVE_UINT32
typedef unsigned int uint32;
#endif
#elif SIZEOF_LONG == 4
#ifndef HAVE_INT32
typedef long int32;
#endif
#ifndef HAVE_UINT32
typedef unsigned long uint32;
#endif
#else
#error Neither int or long is of 4 bytes width
#endif

#if !defined(HAVE_ULONG) && !defined(__USE_MISC)
typedef unsigned long	ulong;		  /* Short for unsigned long */
#endif
#ifndef longlong_defined
/* 
  Using [unsigned] long long is preferable as [u]longlong because we use 
  [unsigned] long long unconditionally in many places, 
  for example in constants with [U]LL suffix.
*/
#if defined(HAVE_LONG_LONG) && SIZEOF_LONG_LONG == 8
typedef unsigned long long int ulonglong; /* ulong or unsigned long long */
typedef long long int	longlong;
#else
typedef unsigned long	ulonglong;	  /* ulong or unsigned long long */
typedef long		longlong;
#endif
#endif
#ifndef HAVE_INT64
typedef longlong int64;
#endif
#ifndef HAVE_UINT64
typedef ulonglong uint64;
#endif

#if defined(NO_CLIENT_LONG_LONG)
typedef unsigned long my_ulonglong;
#elif defined (__WIN__)
typedef unsigned __int64 my_ulonglong;
#else
typedef unsigned long long my_ulonglong;
#endif

#if SIZEOF_CHARP == SIZEOF_INT
typedef int intptr;
#elif SIZEOF_CHARP == SIZEOF_LONG
typedef long intptr;
#elif SIZEOF_CHARP == SIZEOF_LONG_LONG
typedef long long intptr;
#else
#error sizeof(void *) is neither sizeof(int) nor sizeof(long) nor sizeof(long long)
#endif

#ifdef USE_RAID
/*
  The following is done with a if to not get problems with pre-processors
  with late define evaluation
*/
#if SIZEOF_OFF_T == 4
#define SYSTEM_SIZEOF_OFF_T 4
#else
#define SYSTEM_SIZEOF_OFF_T 8
#endif
#undef  SIZEOF_OFF_T
#define SIZEOF_OFF_T	    8
#else
#define SYSTEM_SIZEOF_OFF_T SIZEOF_OFF_T
#endif /* USE_RAID */

#if SIZEOF_OFF_T > 4
typedef ulonglong my_off_t;
#else
typedef unsigned long my_off_t;
#endif
#define MY_FILEPOS_ERROR	(~(my_off_t) 0)
#if !defined(__WIN__)
typedef off_t os_off_t;
#endif

#if defined(__WIN__)
#define socket_errno	WSAGetLastError()
#define SOCKET_EINTR	WSAEINTR
#define SOCKET_EAGAIN	WSAEINPROGRESS
#define SOCKET_ETIMEDOUT WSAETIMEDOUT
#define SOCKET_EWOULDBLOCK WSAEWOULDBLOCK
#define SOCKET_EADDRINUSE WSAEADDRINUSE
#define SOCKET_ENFILE	ENFILE
#define SOCKET_EMFILE	EMFILE
#else /* Unix */
#define socket_errno	errno
#define closesocket(A)	close(A)
#define SOCKET_EINTR	EINTR
#define SOCKET_EAGAIN	EAGAIN
#define SOCKET_ETIMEDOUT SOCKET_EINTR
#define SOCKET_EWOULDBLOCK EWOULDBLOCK
#define SOCKET_EADDRINUSE EADDRINUSE
#define SOCKET_ENFILE	ENFILE
#define SOCKET_EMFILE	EMFILE
#endif

typedef uint8		int7;	/* Most effective integer 0 <= x <= 127 */
typedef short		int15;	/* Most effective integer 0 <= x <= 32767 */
typedef int		myf;	/* Type of MyFlags in my_funcs */
typedef char		my_bool; /* Small bool */
#if !defined(bool) && !defined(bool_defined) && (!defined(HAVE_BOOL) || !defined(__cplusplus))
typedef char		bool;	/* Ordinary boolean values 0 1 */
#endif
	/* Macros for converting *constants* to the right type */
#define INT8(v)		(int8) (v)
#define INT16(v)	(int16) (v)
#define INT32(v)	(int32) (v)
#define MYF(v)		(myf) (v)

#ifndef LL
#ifdef HAVE_LONG_LONG
#define LL(A) A ## LL
#else
#define LL(A) A ## L
#endif
#endif

#ifndef ULL
#ifdef HAVE_LONG_LONG
#define ULL(A) A ## ULL
#else
#define ULL(A) A ## UL
#endif
#endif

/*
  Defines to make it possible to prioritize register assignments. No
  longer that important with modern compilers.
*/
#ifndef USING_X
#define reg1 register
#define reg2 register
#define reg3 register
#define reg4 register
#define reg5 register
#define reg6 register
#define reg7 register
#define reg8 register
#define reg9 register
#define reg10 register
#define reg11 register
#define reg12 register
#define reg13 register
#define reg14 register
#define reg15 register
#define reg16 register
#endif

/*
  Sometimes we want to make sure that the variable is not put into
  a register in debugging mode so we can see its value in the core
*/

#ifndef DBUG_OFF
#define dbug_volatile volatile
#else
#define dbug_volatile
#endif

/* Defines for time function */