my_global.h

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#define set_bits(type, bit_count) (sizeof(type)*8 <= (bit_count) ? ~(type) 0 : ((((type) 1) << (bit_count)) - (type) 1))
#define array_elements(A) ((uint) (sizeof(A)/sizeof(A[0])))
#ifndef HAVE_RINT
#define rint(A) floor((A)+(((A) < 0)? -0.5 : 0.5))
#endif

/* Define some general constants */
#ifndef TRUE
#define TRUE		(1)	/* Logical true */
#define FALSE		(0)	/* Logical false */
#endif

#if defined(__GNUC__)
#define function_volatile	volatile
#define my_reinterpret_cast(A) reinterpret_cast<A>
#define my_const_cast(A) const_cast<A>
#elif !defined(my_reinterpret_cast)
#define my_reinterpret_cast(A) (A)
#define my_const_cast(A) (A)
#endif
#if !defined(__attribute__) && (defined(__cplusplus) || !defined(__GNUC__)  || __GNUC__ == 2 && __GNUC_MINOR__ < 8)
#define __attribute__(A)
#endif

/*
  Wen using the embedded library, users might run into link problems,
  dupicate declaration of __cxa_pure_virtual, solved by declaring it a
  weak symbol.
*/
#ifdef USE_MYSYS_NEW
C_MODE_START
int __cxa_pure_virtual () __attribute__ ((weak));
C_MODE_END
#endif

/* From old s-system.h */

/*
  Support macros for non ansi & other old compilers. Since such
  things are no longer supported we do nothing. We keep then since
  some of our code may still be needed to upgrade old customers.
*/
#define _VARARGS(X) X
#define _STATIC_VARARGS(X) X
#define _PC(X)	X

#if defined(DBUG_ON) && defined(DBUG_OFF)
#undef DBUG_OFF
#endif

#if defined(_lint) && !defined(DBUG_OFF)
#define DBUG_OFF
#endif

#include <my_dbug.h>

#define MIN_ARRAY_SIZE	0	/* Zero or One. Gcc allows zero*/
#define ASCII_BITS_USED 8	/* Bit char used */
#define NEAR_F			/* No near function handling */

/* Some types that is different between systems */

typedef int	File;		/* File descriptor */
#ifndef Socket_defined
typedef int	my_socket;	/* File descriptor for sockets */
#define INVALID_SOCKET -1
#endif
/* Type for fuctions that handles signals */
#define sig_handler RETSIGTYPE
C_MODE_START
typedef void	(*sig_return)();/* Returns type from signal */
C_MODE_END
#if defined(__GNUC__) && !defined(_lint)
typedef char	pchar;		/* Mixed prototypes can take char */
typedef char	puchar;		/* Mixed prototypes can take char */
typedef char	pbool;		/* Mixed prototypes can take char */
typedef short	pshort;		/* Mixed prototypes can take short int */
typedef float	pfloat;		/* Mixed prototypes can take float */
#else
typedef int	pchar;		/* Mixed prototypes can't take char */
typedef uint	puchar;		/* Mixed prototypes can't take char */
typedef int	pbool;		/* Mixed prototypes can't take char */
typedef int	pshort;		/* Mixed prototypes can't take short int */
typedef double	pfloat;		/* Mixed prototypes can't take float */
#endif
C_MODE_START
typedef int	(*qsort_cmp)(const void *,const void *);
typedef int	(*qsort_cmp2)(void*, const void *,const void *);
C_MODE_END
#ifdef HAVE_mit_thread
#define qsort_t void
#undef QSORT_TYPE_IS_VOID
#define QSORT_TYPE_IS_VOID
#else
#define qsort_t RETQSORTTYPE	/* Broken GCC cant handle typedef !!!! */
#endif
#ifdef HAVE_mit_thread
#define size_socket socklen_t	/* Type of last arg to accept */
#else
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
typedef SOCKET_SIZE_TYPE size_socket;
#endif

#ifndef SOCKOPT_OPTLEN_TYPE
#define SOCKOPT_OPTLEN_TYPE size_socket
#endif

/* file create flags */

#ifndef O_SHARE			/* Probably not windows */
#define O_SHARE		0	/* Flag to my_open for shared files */
#ifndef O_BINARY
#define O_BINARY	0	/* Flag to my_open for binary files */
#endif
#ifndef FILE_BINARY
#define FILE_BINARY	O_BINARY /* Flag to my_fopen for binary streams */
#endif
#ifdef HAVE_FCNTL
#define HAVE_FCNTL_LOCK
#define F_TO_EOF	0L	/* Param to lockf() to lock rest of file */
#endif
#endif /* O_SHARE */

#ifndef O_TEMPORARY
#define O_TEMPORARY	0
#endif
#ifndef O_SHORT_LIVED
#define O_SHORT_LIVED	0
#endif
#ifndef O_NOFOLLOW
#define O_NOFOLLOW      0
#endif

/* additional file share flags for win32 */
#ifdef __WIN__
#define _SH_DENYRWD     0x110    /* deny read/write mode & delete */
#define _SH_DENYWRD     0x120    /* deny write mode & delete      */
#define _SH_DENYRDD     0x130    /* deny read mode & delete       */
#define _SH_DENYDEL     0x140    /* deny delete only              */
#endif /* __WIN__ */


/* #define USE_RECORD_LOCK	*/

	/* Unsigned types supported by the compiler */
#define UNSINT8			/* unsigned int8 (char) */
#define UNSINT16		/* unsigned int16 */
#define UNSINT32		/* unsigned int32 */

	/* General constants */
#define SC_MAXWIDTH	256	/* Max width of screen (for error messages) */
#define FN_LEN		256	/* Max file name len */
#define FN_HEADLEN	253	/* Max length of filepart of file name */
#define FN_EXTLEN	20	/* Max length of extension (part of FN_LEN) */
#define FN_REFLEN	512	/* Max length of full path-name */
#define FN_EXTCHAR	'.'
#define FN_HOMELIB	'~'	/* ~/ is used as abbrev for home dir */
#define FN_CURLIB	'.'	/* ./ is used as abbrev for current dir */
#define FN_PARENTDIR	".."	/* Parent directory; Must be a string */
#define FN_DEVCHAR	':'

#ifndef FN_LIBCHAR
#ifdef __EMX__
#define FN_LIBCHAR	'\\'
#define FN_ROOTDIR	"\\"
#else
#define FN_LIBCHAR	'/'
#define FN_ROOTDIR	"/"
#endif
#endif
#define MY_NFILE	64	/* This is only used to save filenames */
#ifndef OS_FILE_LIMIT
#define OS_FILE_LIMIT	65535
#endif

/* #define EXT_IN_LIBNAME     */
/* #define FN_NO_CASE_SENCE   */
/* #define FN_UPPER_CASE TRUE */

/*
  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__
#ifdef OS2
#define closesocket(A)	soclose(A)
#else
#define closesocket(A)	close(A)
#endif
#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 */

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

/* Remove some things that mit_thread break or doesn't support */
#if defined(HAVE_mit_thread) && defined(THREAD)
#undef HAVE_PREAD
#undef HAVE_REALPATH
#undef HAVE_MLOCK
#undef HAVE_TEMPNAM				/* Use ours */
#undef HAVE_PTHREAD_SETPRIO
#undef HAVE_FTRUNCATE
#undef HAVE_READLINK
#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

#if !defined(HAVE_ISINF) && !defined(isinf)
#define isinf(X)    0
#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) ((byte*) (ptr)+size)
#define PTR_BYTE_DIFF(A,B) (my_ptrdiff_t) ((byte*) (A) - (byte*) (B))

#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 */

#if defined(VOIDTYPE)
typedef void	*gptr;		/* Generic pointer */
#else
typedef char	*gptr;		/* Generic pointer */
#endif
#ifndef HAVE_INT_8_16_32
typedef signed char int8;       /* Signed integer >= 8  bits */
typedef short	int16;		/* Signed integer >= 16 bits */
#endif
#ifndef HAVE_UCHAR
typedef unsigned char	uchar;	/* Short for unsigned char */
#endif
typedef unsigned char	uint8;	/* Short for unsigned integer >= 8  bits */
typedef unsigned short	uint16; /* Short for unsigned integer >= 16 bits */

#if SIZEOF_INT == 4
#ifndef HAVE_INT_8_16_32
typedef int		int32;
#endif
typedef unsigned int	uint32; /* Short for unsigned integer >= 32 bits */
#elif SIZEOF_LONG == 4
#ifndef HAVE_INT_8_16_32
typedef long		int32;
#endif
typedef unsigned long	uint32; /* Short for unsigned integer >= 32 bits */
#else
#error "Neither int or long is of 4 bytes width"
#endif

#if !defined(HAVE_ULONG) && !defined(TARGET_OS_LINUX) && !defined(__USE_MISC)
typedef unsigned long	ulong;		  /* Short for unsigned long */
#endif
#ifndef longlong_defined
#if defined(HAVE_LONG_LONG) && SIZEOF_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

#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

#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__) && !defined(OS2)
typedef off_t os_off_t;
#endif

#if defined(__WIN__)
#define socket_errno	WSAGetLastError()
#define SOCKET_EINTR	WSAEINTR
#define SOCKET_EAGAIN	WSAEINPROGRESS