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/* ucl_conf.h -- main internal configuration file for the the UCL library

   This file is part of the UCL data compression library.

   Copyright (C) 1996-2002 Markus Franz Xaver Johannes Oberhumer

   All Rights Reserved.

   The UCL library is free software; you can redistribute it and/or

   modify it under the terms of the GNU General Public License as

   published by the Free Software Foundation; either version 2 of

   the License, or (at your option) any later version.

   The UCL library is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License

   along with the UCL library; see the file COPYING.

   If not, write to the Free Software Foundation, Inc.,

   59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

   Markus F.X.J. Oberhumer

   <markus@oberhumer.com>

 */

/* WARNING: this file should *not* be used by applications. It is

   part of the implementation of the library and is subject

   to change.

 */

#ifndef __UCL_CONF_H

#define __UCL_CONF_H

#if !defined(__UCL_IN_MINIUCL)

#  ifndef __UCLCONF_H

#    include <ucl/uclconf.h>

#  endif

#endif

/***********************************************************************

// memory checkers

************************************************************************/

#if !defined(__BOUNDS_CHECKING_ON)

#  define BOUNDS_CHECKING_OFF_DURING(stmt)      stmt

#  define BOUNDS_CHECKING_OFF_IN_EXPR(expr)     (expr)

#endif

/***********************************************************************

// autoconf section

************************************************************************/

#if !defined(UCL_HAVE_CONFIG_H)

#  define HAVE_MEMCMP

#  define HAVE_MEMCPY

#  define HAVE_MEMMOVE

#  define HAVE_MEMSET

#endif

#if defined(__UCL_DOS16) || defined(__UCL_WIN16)

#  define HAVE_MALLOC_H

#  define HAVE_HALLOC

#endif

#undef NDEBUG

#if !defined(UCL_DEBUG)

#  define NDEBUG

#endif

#if !defined(UCL_UNUSED)

#  define UCL_UNUSED(parm)  (parm = parm)

#endif

#if !defined(__inline__) && !defined(__GNUC__)

#  if defined(__cplusplus)

#    define __inline__      inline

#  else

#    define __inline__      /* nothing */

#  endif

#endif

/***********************************************************************

//

************************************************************************/

#if 1

#  define UCL_BYTE(x)       ((unsigned char) (x))

#else

#  define UCL_BYTE(x)       ((unsigned char) ((x) & 0xff))

#endif

#if 0

#  define UCL_USHORT(x)     ((unsigned short) (x))

#else

#  define UCL_USHORT(x)     ((unsigned short) ((x) & 0xffff))

#endif

#define UCL_MAX(a,b)        ((a) >= (b) ? (a) : (b))

#define UCL_MIN(a,b)        ((a) <= (b) ? (a) : (b))

#define UCL_MAX3(a,b,c)     ((a) >= (b) ? UCL_MAX(a,c) : UCL_MAX(b,c))

#define UCL_MIN3(a,b,c)     ((a) <= (b) ? UCL_MIN(a,c) : UCL_MIN(b,c))

#define ucl_sizeof(type)    ((ucl_uint) (sizeof(type)))

#define UCL_HIGH(array)     ((ucl_uint) (sizeof(array)/sizeof(*(array))))

/* this always fits into 16 bits */

#define UCL_SIZE(bits)      (1u << (bits))

#define UCL_MASK(bits)      (UCL_SIZE(bits) - 1)

#define UCL_LSIZE(bits)     (1ul << (bits))

#define UCL_LMASK(bits)     (UCL_LSIZE(bits) - 1)

#define UCL_USIZE(bits)     ((ucl_uint) 1 << (bits))

#define UCL_UMASK(bits)     (UCL_USIZE(bits) - 1)

/* Maximum value of a signed/unsigned type.

   Do not use casts, avoid overflows ! */

#define UCL_STYPE_MAX(b)    (((1l  << (8*(b)-2)) - 1l)  + (1l  << (8*(b)-2)))

#define UCL_UTYPE_MAX(b)    (((1ul << (8*(b)-1)) - 1ul) + (1ul << (8*(b)-1)))

/***********************************************************************

//

************************************************************************/

#if !defined(SIZEOF_UNSIGNED)

#  if (UINT_MAX == 0xffff)

#    define SIZEOF_UNSIGNED         2

#  elif (UINT_MAX == UCL_0xffffffffL)

#    define SIZEOF_UNSIGNED         4

#  elif (UINT_MAX >= UCL_0xffffffffL)

#    define SIZEOF_UNSIGNED         8

#  else

#    error "SIZEOF_UNSIGNED"

#  endif

#endif

#if !defined(SIZEOF_UNSIGNED_LONG)

#  if (ULONG_MAX == UCL_0xffffffffL)

#    define SIZEOF_UNSIGNED_LONG    4

#  elif (ULONG_MAX >= UCL_0xffffffffL)

#    define SIZEOF_UNSIGNED_LONG    8

#  else

#    error "SIZEOF_UNSIGNED_LONG"

#  endif

#endif

#if !defined(SIZEOF_SIZE_T)

#  define SIZEOF_SIZE_T             SIZEOF_UNSIGNED_LONG

#endif

#if !defined(SIZE_T_MAX)

#  define SIZE_T_MAX                UCL_UTYPE_MAX(SIZEOF_SIZE_T)

#endif

/***********************************************************************

// <string.h> section

************************************************************************/

#if defined(NO_MEMCMP)

#  undef HAVE_MEMCMP

#endif

#if (UCL_UINT_MAX <= SIZE_T_MAX) && defined(HAVE_MEMCMP)

#  define ucl_memcmp                memcmp

#endif

#if (UCL_UINT_MAX <= SIZE_T_MAX) && defined(HAVE_MEMCPY)

#  define ucl_memcpy                memcpy

#endif

#if (UCL_UINT_MAX <= SIZE_T_MAX) && defined(HAVE_MEMMOVE)

#  define ucl_memmove               memmove

#endif

#if (UCL_UINT_MAX <= SIZE_T_MAX) && defined(HAVE_MEMSET)

#  define ucl_memset                memset

#endif

#if !defined(HAVE_MEMCMP)

#  undef memcmp

#  define memcmp                    ucl_memcmp

#endif

#if !defined(HAVE_MEMCPY)

#  undef memcpy

#  define memcpy                    ucl_memcpy

#endif

#if !defined(HAVE_MEMMOVE)

#  undef memmove

#  define memmove                   ucl_memmove

#endif

#if !defined(HAVE_MEMSET)

#  undef memset

#  define memset                    ucl_memset

#endif

/***********************************************************************

// compiler and architecture specific stuff

************************************************************************/

/* Some defines that indicate if memory can be accessed at unaligned

 * memory addresses. You should also test that this is actually faster

 * even if it is allowed by your system.

 */

#if 1 && defined(__UCL_i386) && (UINT_MAX == UCL_0xffffffffL)

#  if !defined(UCL_UNALIGNED_OK_2) && (USHRT_MAX == 0xffff)

#    define UCL_UNALIGNED_OK_2

#  endif

#  if !defined(UCL_UNALIGNED_OK_4) && (UCL_UINT32_MAX == UCL_0xffffffffL)

#    define UCL_UNALIGNED_OK_4

#  endif

#endif

#if defined(UCL_UNALIGNED_OK_2) || defined(UCL_UNALIGNED_OK_4)

#  if !defined(UCL_UNALIGNED_OK)

#    define UCL_UNALIGNED_OK

#  endif

#endif

#if defined(__UCL_NO_UNALIGNED)

#  undef UCL_UNALIGNED_OK

#  undef UCL_UNALIGNED_OK_2

#  undef UCL_UNALIGNED_OK_4

#endif

#if defined(UCL_UNALIGNED_OK_2) && (USHRT_MAX != 0xffff)

#  error "UCL_UNALIGNED_OK_2 must not be defined on this system"

#endif

#if defined(UCL_UNALIGNED_OK_4) && (UCL_UINT32_MAX != UCL_0xffffffffL)

#  error "UCL_UNALIGNED_OK_4 must not be defined on this system"

#endif

/* Many modern processors can transfer 32bit words much faster than

 * bytes - this can significantly speed decompression.

 */

#if defined(__UCL_NO_ALIGNED)

#  undef UCL_ALIGNED_OK_4

#endif

#if defined(UCL_ALIGNED_OK_4) && (UCL_UINT32_MAX != UCL_0xffffffffL)

#  error "UCL_ALIGNED_OK_4 must not be defined on this system"

#endif

/* Definitions for byte order, according to significance of bytes, from low

 * addresses to high addresses. The value is what you get by putting '4'

 * in the most significant byte, '3' in the second most significant byte,

 * '2' in the second least significant byte, and '1' in the least

 * significant byte.

 * The byte order is only needed if we use UCL_UNALIGNED_OK.

 */

#define UCL_LITTLE_ENDIAN       1234

#define UCL_BIG_ENDIAN          4321

#define UCL_PDP_ENDIAN          3412

#if !defined(UCL_BYTE_ORDER)

#  if defined(MFX_BYTE_ORDER)

#    define UCL_BYTE_ORDER      MFX_BYTE_ORDER

#  elif defined(__UCL_i386)

#    define UCL_BYTE_ORDER      UCL_LITTLE_ENDIAN

#  elif defined(BYTE_ORDER)

#    define UCL_BYTE_ORDER      BYTE_ORDER

#  elif defined(__BYTE_ORDER)

#    define UCL_BYTE_ORDER      __BYTE_ORDER

#  endif

#endif

#if defined(UCL_BYTE_ORDER)

#  if (UCL_BYTE_ORDER != UCL_LITTLE_ENDIAN) && \

      (UCL_BYTE_ORDER != UCL_BIG_ENDIAN)

#    error "invalid UCL_BYTE_ORDER"

#  endif

#endif

#if defined(UCL_UNALIGNED_OK) && !defined(UCL_BYTE_ORDER)

#  error "UCL_BYTE_ORDER is not defined"

#endif

/***********************************************************************

// some globals

************************************************************************/

__UCL_EXTERN_C int __ucl_init_done;

__UCL_EXTERN_C const ucl_byte __ucl_copyright[];

UCL_EXTERN(const ucl_byte *) ucl_copyright(void);

__UCL_EXTERN_C const ucl_uint32 _ucl_crc32_table[256];

/***********************************************************************

// ANSI C preprocessor macros

************************************************************************/

#define _UCL_STRINGIZE(x)           #x

#define _UCL_MEXPAND(x)             _UCL_STRINGIZE(x)

/* concatenate */

#define _UCL_CONCAT2(a,b)           a ## b

#define _UCL_CONCAT3(a,b,c)         a ## b ## c

#define _UCL_CONCAT4(a,b,c,d)       a ## b ## c ## d

#define _UCL_CONCAT5(a,b,c,d,e)     a ## b ## c ## d ## e

/* expand and concatenate (by using one level of indirection) */

#define _UCL_ECONCAT2(a,b)          _UCL_CONCAT2(a,b)

#define _UCL_ECONCAT3(a,b,c)        _UCL_CONCAT3(a,b,c)

#define _UCL_ECONCAT4(a,b,c,d)      _UCL_CONCAT4(a,b,c,d)

#define _UCL_ECONCAT5(a,b,c,d,e)    _UCL_CONCAT5(a,b,c,d,e)

/***********************************************************************

//

************************************************************************/

#include "ucl_ptr.h"

#endif /* already included */

/*

vi:ts=4:et

*/