lzo/src/lzo_conf.h

   1 /* lzo_conf.h -- main internal configuration file for the the LZO library
   2
   3    This file is part of the LZO real-time data compression library.
   4
   5    Copyright (C) 2008 Markus Franz Xaver Johannes Oberhumer
   6    Copyright (C) 2007 Markus Franz Xaver Johannes Oberhumer
   7    Copyright (C) 2006 Markus Franz Xaver Johannes Oberhumer
   8    Copyright (C) 2005 Markus Franz Xaver Johannes Oberhumer
   9    Copyright (C) 2004 Markus Franz Xaver Johannes Oberhumer
  10    Copyright (C) 2003 Markus Franz Xaver Johannes Oberhumer
  11    Copyright (C) 2002 Markus Franz Xaver Johannes Oberhumer
  12    Copyright (C) 2001 Markus Franz Xaver Johannes Oberhumer
  13    Copyright (C) 2000 Markus Franz Xaver Johannes Oberhumer
  14    Copyright (C) 1999 Markus Franz Xaver Johannes Oberhumer
  15    Copyright (C) 1998 Markus Franz Xaver Johannes Oberhumer
  16    Copyright (C) 1997 Markus Franz Xaver Johannes Oberhumer
  17    Copyright (C) 1996 Markus Franz Xaver Johannes Oberhumer
  18    All Rights Reserved.
  19
  20    The LZO library is free software; you can redistribute it and/or
  21    modify it under the terms of the GNU General Public License as
  22    published by the Free Software Foundation; either version 2 of
  23    the License, or (at your option) any later version.
  24
  25    The LZO library is distributed in the hope that it will be useful,
  26    but WITHOUT ANY WARRANTY; without even the implied warranty of
  27    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  28    GNU General Public License for more details.
  29
  30    You should have received a copy of the GNU General Public License
  31    along with the LZO library; see the file COPYING.
  32    If not, write to the Free Software Foundation, Inc.,
  33    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  34
  35    Markus F.X.J. Oberhumer
  36    <markus@oberhumer.com>
  37    http://www.oberhumer.com/opensource/lzo/
  38  */
  39
  40
  41 /* WARNING: this file should *not* be used by applications. It is
  42    part of the implementation of the library and is subject
  43    to change.
  44  */
  45
  46
  47 #ifndef __LZO_CONF_H
  48 #define __LZO_CONF_H
  49
  50 #if !defined(__LZO_IN_MINILZO)
  51 #if defined(LZO_CFG_FREESTANDING)
  52 #  define LZO_LIBC_FREESTANDING 1
  53 #  define LZO_OS_FREESTANDING 1
  54 #  define ACC_LIBC_FREESTANDING 1
  55 #  define ACC_OS_FREESTANDING 1
  56 #endif
  57 #if defined(LZO_CFG_NO_UNALIGNED)
  58 #  define ACC_CFG_NO_UNALIGNED 1
  59 #endif
  60 #if defined(LZO_ARCH_GENERIC)
  61 #  define ACC_ARCH_GENERIC 1
  62 #endif
  63 #if defined(LZO_ABI_NEUTRAL_ENDIAN)
  64 #  define ACC_ABI_NEUTRAL_ENDIAN 1
  65 #endif
  66 #if defined(LZO_HAVE_CONFIG_H)
  67 #  define ACC_CONFIG_NO_HEADER 1
  68 #endif
  69 #if defined(LZO_CFG_EXTRA_CONFIG_HEADER)
  70 #  include LZO_CFG_EXTRA_CONFIG_HEADER
  71 #endif
  72 #if defined(__LZOCONF_H) || defined(__LZOCONF_H_INCLUDED)
  73 #  error "include this file first"
  74 #endif
  75 #include "lzo/lzoconf.h"
  76 #endif
  77
  78 #if (LZO_VERSION < 0x02000) || !defined(__LZOCONF_H_INCLUDED)
  79 #  error "version mismatch"
  80 #endif
  81
  82
  83 /***********************************************************************
  84 // pragmas
  85 ************************************************************************/
  86
  87 #if (LZO_CC_BORLANDC && LZO_ARCH_I086)
  88 #  pragma option -h         /* enable fast huge pointers */
  89 #endif
  90
  91 #if (LZO_CC_MSC && (_MSC_VER >= 1000))
  92 #  pragma warning(disable: 4127 4701)
  93 #endif
  94 #if (LZO_CC_MSC && (_MSC_VER >= 1300))
  95    /* avoid `-Wall' warnings in system header files */
  96 #  pragma warning(disable: 4820)
  97    /* avoid warnings about inlining */
  98 #  pragma warning(disable: 4514 4710 4711)
  99 #endif
 100
 101 #if (LZO_CC_SUNPROC)
 102 #  pragma error_messages(off,E_END_OF_LOOP_CODE_NOT_REACHED)
 103 #  pragma error_messages(off,E_LOOP_NOT_ENTERED_AT_TOP)
 104 #endif
 105
 106
 107 /***********************************************************************
 108 //
 109 ************************************************************************/
 110
 111 #if defined(__LZO_MMODEL_HUGE) && (!LZO_HAVE_MM_HUGE_PTR)
 112 #  error "this should not happen - check defines for __huge"
 113 #endif
 114
 115 #if defined(__LZO_IN_MINILZO) || defined(LZO_CFG_FREESTANDING)
 116 #elif (LZO_OS_DOS16 || LZO_OS_OS216 || LZO_OS_WIN16)
 117 #  define ACC_WANT_ACC_INCD_H 1
 118 #  define ACC_WANT_ACC_INCE_H 1
 119 #  define ACC_WANT_ACC_INCI_H 1
 120 #elif 1
 121 #  include <string.h>
 122 #else
 123 #  define ACC_WANT_ACC_INCD_H 1
 124 #endif
 125 #include "miniacc.h"
 126
 127
 128 #if defined(LZO_CFG_FREESTANDING)
 129 #  undef HAVE_MEMCMP
 130 #  undef HAVE_MEMCPY
 131 #  undef HAVE_MEMMOVE
 132 #  undef HAVE_MEMSET
 133 #endif
 134
 135 #if !defined(HAVE_MEMCMP)
 136 #  undef memcmp
 137 #  define memcmp(a,b,c)         lzo_memcmp(a,b,c)
 138 #elif !defined(__LZO_MMODEL_HUGE)
 139 #  define lzo_memcmp(a,b,c)     memcmp(a,b,c)
 140 #endif
 141 #if !defined(HAVE_MEMCPY)
 142 #  undef memcpy
 143 #  define memcpy(a,b,c)         lzo_memcpy(a,b,c)
 144 #elif !defined(__LZO_MMODEL_HUGE)
 145 #  define lzo_memcpy(a,b,c)     memcpy(a,b,c)
 146 #endif
 147 #if !defined(HAVE_MEMMOVE)
 148 #  undef memmove
 149 #  define memmove(a,b,c)        lzo_memmove(a,b,c)
 150 #elif !defined(__LZO_MMODEL_HUGE)
 151 #  define lzo_memmove(a,b,c)    memmove(a,b,c)
 152 #endif
 153 #if !defined(HAVE_MEMSET)
 154 #  undef memset
 155 #  define memset(a,b,c)         lzo_memset(a,b,c)
 156 #elif !defined(__LZO_MMODEL_HUGE)
 157 #  define lzo_memset(a,b,c)     memset(a,b,c)
 158 #endif
 159
 160
 161 #undef NDEBUG
 162 #if defined(LZO_CFG_FREESTANDING)
 163 #  undef LZO_DEBUG
 164 #  define NDEBUG 1
 165 #  undef assert
 166 #  define assert(e) ((void)0)
 167 #else
 168 #  if !defined(LZO_DEBUG)
 169 #    define NDEBUG 1
 170 #  endif
 171 #  include <assert.h>
 172 #endif
 173
 174 #if 0 && defined(__BOUNDS_CHECKING_ON)
 175 #  include <unchecked.h>
 176 #else
 177 #  define BOUNDS_CHECKING_OFF_DURING(stmt)      stmt
 178 #  define BOUNDS_CHECKING_OFF_IN_EXPR(expr)     (expr)
 179 #endif
 180
 181 #if !defined(__lzo_inline)
 182 #  define __lzo_inline
 183 #endif
 184 #if !defined(__lzo_forceinline)
 185 #  define __lzo_forceinline
 186 #endif
 187 #if !defined(__lzo_noinline)
 188 #  define __lzo_noinline
 189 #endif
 190
 191
 192 /***********************************************************************
 193 //
 194 ************************************************************************/
 195
 196 #if 1
 197 #  define LZO_BYTE(x)       ((unsigned char) (x))
 198 #else
 199 #  define LZO_BYTE(x)       ((unsigned char) ((x) & 0xff))
 200 #endif
 201
 202 #define LZO_MAX(a,b)        ((a) >= (b) ? (a) : (b))
 203 #define LZO_MIN(a,b)        ((a) <= (b) ? (a) : (b))
 204 #define LZO_MAX3(a,b,c)     ((a) >= (b) ? LZO_MAX(a,c) : LZO_MAX(b,c))
 205 #define LZO_MIN3(a,b,c)     ((a) <= (b) ? LZO_MIN(a,c) : LZO_MIN(b,c))
 206
 207 #define lzo_sizeof(type)    ((lzo_uint) (sizeof(type)))
 208
 209 #define LZO_HIGH(array)     ((lzo_uint) (sizeof(array)/sizeof(*(array))))
 210
 211 /* this always fits into 16 bits */
 212 #define LZO_SIZE(bits)      (1u << (bits))
 213 #define LZO_MASK(bits)      (LZO_SIZE(bits) - 1)
 214
 215 #define LZO_LSIZE(bits)     (1ul << (bits))
 216 #define LZO_LMASK(bits)     (LZO_LSIZE(bits) - 1)
 217
 218 #define LZO_USIZE(bits)     ((lzo_uint) 1 << (bits))
 219 #define LZO_UMASK(bits)     (LZO_USIZE(bits) - 1)
 220
 221 #if !defined(DMUL)
 222 #if 0
 223    /* 32*32 multiplies may be faster than 64*64 on some 64-bit machines,
 224     * but then we need extra casts from unsigned<->size_t */
 225 #  define DMUL(a,b) ((lzo_xint) ((lzo_uint32)(a) * (lzo_uint32)(b)))
 226 #else
 227 #  define DMUL(a,b) ((lzo_xint) ((a) * (b)))
 228 #endif
 229 #endif
 230
 231
 232 /***********************************************************************
 233 // compiler and architecture specific stuff
 234 ************************************************************************/
 235
 236 /* Some defines that indicate if memory can be accessed at unaligned
 237  * memory addresses. You should also test that this is actually faster
 238  * even if it is allowed by your system.
 239  */
 240
 241 #if 1 && !defined(LZO_CFG_NO_UNALIGNED)
 242 #if 1 && (LZO_ARCH_AMD64 || LZO_ARCH_I386)
 243 #  if (LZO_SIZEOF_SHORT == 2)
 244 #    define LZO_UNALIGNED_OK_2
 245 #  endif
 246 #  if (LZO_SIZEOF_INT == 4)
 247 #    define LZO_UNALIGNED_OK_4
 248 #  endif
 249 #endif
 250 #endif
 251
 252 #if defined(LZO_UNALIGNED_OK_2)
 253   LZO_COMPILE_TIME_ASSERT_HEADER(sizeof(short) == 2)
 254 #endif
 255 #if defined(LZO_UNALIGNED_OK_4)
 256   LZO_COMPILE_TIME_ASSERT_HEADER(sizeof(lzo_uint32) == 4)
 257 #elif defined(LZO_ALIGNED_OK_4)
 258   LZO_COMPILE_TIME_ASSERT_HEADER(sizeof(lzo_uint32) == 4)
 259 #endif
 260
 261
 262 /* Fast memcpy that copies multiples of 8 byte chunks.
 263  * len is the number of bytes.
 264  * note: all parameters must be lvalues, len >= 8
 265  *       dest and src advance, len is undefined afterwards
 266  */
 267
 268 #define MEMCPY8_DS(dest,src,len) \
 269     lzo_memcpy(dest,src,len); dest += len; src += len
 270
 271 #define BZERO8_PTR(s,l,n) \
 272     lzo_memset((lzo_voidp)(s),0,(lzo_uint)(l)*(n))
 273
 274 #define MEMCPY_DS(dest,src,len) \
 275     do *dest++ = *src++; while (--len > 0)
 276
 277
 278 /***********************************************************************
 279 // some globals
 280 ************************************************************************/
 281
 282 __LZO_EXTERN_C int __lzo_init_done;
 283 __LZO_EXTERN_C const char __lzo_copyright[];
 284 LZO_EXTERN(const lzo_bytep) lzo_copyright(void);
 285
 286
 287 /***********************************************************************
 288 //
 289 ************************************************************************/
 290
 291 #include "lzo_ptr.h"
 292
 293
 294 /* Generate compressed data in a deterministic way.
 295  * This is fully portable, and compression can be faster as well.
 296  * A reason NOT to be deterministic is when the block size is
 297  * very small (e.g. 8kB) or the dictionary is big, because
 298  * then the initialization of the dictionary becomes a relevant
 299  * magnitude for compression speed.
 300  */
 301 #define LZO_DETERMINISTIC
 302
 303
 304 #define LZO_DICT_USE_PTR
 305 #if 0 && (LZO_ARCH_I086)
 306 #  undef LZO_DICT_USE_PTR
 307 #endif
 308
 309 #if defined(LZO_DICT_USE_PTR)
 310 #  define lzo_dict_t    const lzo_bytep
 311 #  define lzo_dict_p    lzo_dict_t __LZO_MMODEL *
 312 #else
 313 #  define lzo_dict_t    lzo_uint
 314 #  define lzo_dict_p    lzo_dict_t __LZO_MMODEL *
 315 #endif
 316
 317
 318 #endif /* already included */
 319
 320 /*
 321 vi:ts=4:et
 322 */
 323