zutil.h

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00001 // $Id: zutil.h 751 2006-03-31 15:43:49Z alex $
00002 /* @@tag:xara-cn@@ DO NOT MODIFY THIS LINE
00003 ================================XARAHEADERSTART===========================
00004  
00005                Xara LX, a vector drawing and manipulation program.
00006                     Copyright (C) 1993-2006 Xara Group Ltd.
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00009 
00010 LICENSE TO USE AND MODIFY SOFTWARE
00011 ----------------------------------
00012 
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00067 ARRANGEMENTS FOR CONTRIBUTION OF MODIFICATIONS
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00094                         http://www.xara.com/
00095 
00096 =================================XARAHEADEREND============================
00097  */
00098 
00099 // This class contains all the file deflating code
00100 
00101 #ifndef INC_ZIPUTIL
00102 #define INC_ZIPUTIL
00103 
00104 // Our mapping for our classes onto the equivalents
00105 //#define z_stream ZStream
00106 //#define gz_stream GZipStream
00107 //#define deflate_state DeflateState
00108 
00109 /* 
00110      The 'zlib' compression library provides in-memory compression and
00111   decompression functions, including integrity checks of the uncompressed
00112   data.  This version of the library supports only one compression method
00113   (deflation) but other algorithms may be added later and will have the same
00114   stream interface.
00115 
00116      For compression the application must provide the output buffer and
00117   may optionally provide the input buffer for optimization. For decompression,
00118   the application must provide the input buffer and may optionally provide
00119   the output buffer for optimization.
00120 
00121      Compression can be done in a single step if the buffers are large
00122   enough (for example if an input file is mmap'ed), or can be done by
00123   repeated calls of the compression function.  In the latter case, the
00124   application must provide more input and/or consume the output
00125   (providing more output space) before each call.
00126 
00127      The library does not install any signal handler. It is recommended to
00128   add at least a handler for SIGSEGV when decompressing; the library checks
00129   the consistency of the input data whenever possible but may go nuts
00130   for some forms of corrupted input.
00131 */
00132 
00133 #include <string.h>
00134 
00135 // For the PNG stuff, change references to z_stream to ZStream
00136 #define ZStream z_stream 
00137 
00138 // Should really be this but version 1.1 Camelot does not seem to like different version numbers
00139 //#define ZLIB_VERSION "1.0"
00140 #define ZLIB_VERSION "0.92"
00141 #define ZLIB_VERSIONNO 0.92
00142 
00143 // We will put the real version number in these new variables.
00144 #define ZLIB_MAJOR_VERSIONNO 0
00145 #define ZLIB_MINOR_VERSIONNO 99
00146 
00147 //extern const char *z_errmsg[10]; /* indexed by 2-zlib_error */
00148 /* (size given to avoid silly warnings with Visual C++) */
00149 
00150 typedef void FAR *voidpf;
00151 typedef void     *voidp;
00152 
00153 typedef unsigned char  Byte;  /* 8 bits */
00154 typedef UINT32   uInt;  /* 16 bits or more */
00155 typedef UINT32  uLong; /* 32 bits or more */
00156 
00157 typedef Byte  FAR Bytef;
00158 typedef char  FAR charf;
00159 typedef INT32   FAR intf;
00160 typedef uInt  FAR uIntf;
00161 typedef uLong FAR uLongf;
00162 
00163 #define ERR_MSG(err) (char*)z_errmsg[Z_NEED_DICT-(err)]
00164 
00165 //#define ERR_RETURN(strm,err) return (strm->msg = ERR_MSG(err), (err))
00166 /* To be used only when the state is known to be valid */
00167 
00168 // My old form
00169 //#define ERR_RETURN(strm,err) return (strm->msg = GZipFile::z_errmsg[Z_NEED_DICT-(err)], err)
00171 #define ERR_RETURN(strm,err) return (err)
00172 
00173 
00174 //-------------------------------------------------------------------------------------------
00175 // Constants from file zconf.h
00176 //-------------------------------------------------------------------------------------------
00177 
00178 /* common constants */
00179 
00180 #define DEFLATED   8
00181 
00182 #define DEF_WBITS 15
00183 /* default windowBits for decompression. MAX_WBITS is for compression only */
00184 
00185 /*
00186  * Compile with -DMAXSEG_64K if the alloc function cannot allocate more
00187  * than 64k bytes at a time (needed on systems with 16-bit INT32).
00188  */
00189 //#  define __32BIT__
00190 //#  define MAXSEG_64K
00191 
00192 /* The memory requirements for deflate are (in bytes):
00193             1 << (windowBits+2)   +  1 << (memLevel+9)
00194  that is: 128K for windowBits=15  +  128K for memLevel = 8  (default values)
00195  plus a few kilobytes for small objects. For example, if you want to reduce
00196  the default memory requirements from 256K to 128K, compile with
00197      make CFLAGS="-O -DMAX_WBITS=14 -DMAX_MEM_LEVEL=7"
00198  Of course this will generally degrade compression (there's no free lunch).
00199 
00200    The memory requirements for inflate are (in bytes) 1 << windowBits
00201  that is, 32K for windowBits=15 (default value) plus a few kilobytes
00202  for small objects.
00203 */
00204 
00205 /* Maximum value for memLevel in deflateInit2 */
00206 #define MAX_MEM_LEVEL 9
00207 
00208 /* Maximum value for windowBits in deflateInit2 and inflateInit2 */
00209 #define MAX_WBITS   15 /* 32K LZ77 window */
00210 
00211 
00212 //-------------------------------------------------------------------------------------------
00213 // Constants from file zutil.h
00214 //-------------------------------------------------------------------------------------------
00215 
00216 #if MAX_MEM_LEVEL >= 8
00217 #  define DEF_MEM_LEVEL 8
00218 #else
00219 #  define DEF_MEM_LEVEL  MAX_MEM_LEVEL
00220 #endif
00221 /* default memLevel */
00222 
00223 #define STORED_BLOCK 0
00224 #define STATIC_TREES 1
00225 #define DYN_TREES    2
00226 /* The three kinds of block type */
00227 
00228 #define MIN_MATCH  3
00229 #define MAX_MATCH  258
00230 /* The minimum and maximum match lengths */
00231 
00232 #define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */
00233 
00234 typedef unsigned char  uch;
00235 typedef uch FAR uchf;
00236 typedef unsigned short ush;
00237 typedef ush FAR ushf;
00238 typedef UINT32  ulg;
00239 
00240 //-------------------------------------------------------------------------------------------
00241 // Constants from file zlib.h
00242 //-------------------------------------------------------------------------------------------
00243 
00244 /* constants */
00245 
00246 #define Z_NO_FLUSH      0
00247 #define Z_PARTIAL_FLUSH 1
00248 #define Z_SYNC_FLUSH    2
00249 #define Z_FULL_FLUSH    3
00250 #define Z_FINISH        4
00251 /* Allowed flush values; see deflate() below for details */
00252 
00253 #define Z_OK            0
00254 #define Z_STREAM_END    1
00255 #define Z_NEED_DICT     2
00256 #define Z_ERRNO        (-1)
00257 #define Z_STREAM_ERROR (-2)
00258 #define Z_DATA_ERROR   (-3)
00259 #define Z_MEM_ERROR    (-4)
00260 #define Z_BUF_ERROR    (-5)
00261 #define Z_VERSION_ERROR (-6)
00262 // This is our special no compressed section found error
00263 #define Z_UNCOMPRESSED_ERROR (-7)
00264 /* Return codes for the compression/decompression functions. Negative
00265  * values are errors, positive values are used for special but normal events.
00266  */
00267 
00268 #define Z_NO_COMPRESSION         0
00269 #define Z_BEST_SPEED             1
00270 #define Z_BEST_COMPRESSION       9
00271 #define Z_DEFAULT_COMPRESSION  (-1)
00272 /* compression levels */
00273 
00274 #define Z_FILTERED            1
00275 #define Z_HUFFMAN_ONLY        2
00276 #define Z_DEFAULT_STRATEGY    0
00277 /* compression strategy; see deflateInit2() below for details */
00278 
00279 #define Z_BINARY   0
00280 #define Z_ASCII    1
00281 #define Z_UNKNOWN  2
00282 /* Possible values of the data_type field */
00283 
00284 #define Z_DEFLATED   8
00285 /* The deflate compression method (the only one supported in this version) */
00286 
00287 #define Z_NULL  0  /* for initializing zalloc, zfree, opaque */
00288 
00289 
00290 
00291 //-------------------------------------------------------------------------------------------
00292 // Constants from file zutil.h
00293 //-------------------------------------------------------------------------------------------
00294 
00295 /* target dependencies */
00296 
00297 /* Windows NT */
00298 #define OS_CODE  0x0b
00299 #define zmemcpy memcpy
00300 #define zmemcmp memcmp
00301 #define zmemzero(dest, len) memset(dest, 0, len)
00302 
00303 /* Diagnostic functions */
00304 
00305 #define _FTPRINTF TRACEUSER( "Neville", _T("%s"),x) 
00306 
00307 //#ifdef _DEBUG
00308 //  #define DEBUG 1
00309 //#else
00310 //  #undef DEBUG
00311 //#endif 
00312 
00313 #ifdef DEBUG
00314 #  include <stdio.h>
00315 #  ifndef verbose
00316 #    define verbose 0
00317 #  endif
00318 #  define Assert(cond,msg) ERROR3IF(!(cond),msg); //{if(!(cond)) z_error(msg);}
00319 #  define Assert3(msg) ERROR3(msg); //{if(!(cond)) z_error(msg);}
00320 #  define Trace(x) {TRACEUSER( "Neville", _T("%s"),x); }
00321 #  define Tracev(x) {if (verbose) TRACEUSER( "Neville", _T("%s"),x) ;}
00322 #  define Tracevv(x) {if (verbose>1) TRACEUSER( "Neville", _T("%s"),x) ;}
00323 #  define Tracec(c,x) {if (verbose && (c)) TRACEUSER( "Neville", _T("%s"),x) ;}
00324 #  define Tracecv(c,x) {if (verbose>1 && (c)) TRACEUSER( "Neville", _T("%s"),x) ;}
00325 #else
00326 #  define Assert(cond,msg)
00327 #  define Trace(x)
00328 #  define Tracev(x)
00329 #  define Tracevv(x)
00330 #  define Tracec(c,x)
00331 #  define Tracecv(c,x)
00332 #endif
00333 
00334 typedef uLong (*check_func)(uLong check, const Bytef *buf, uInt len);
00335 
00336 //extern void z_error(char *m);
00337 #define z_error(m) ERROR3(m); 
00338 
00339 //#define ZALLOC(strm, items, size) CCMalloc(size)
00340 //#define ZFREE(strm, addr)  {CCFree(addr); addr = NULL; }
00341 //#define TRY_FREE(s, p) {if (p) ZFREE(s, p)}
00342 
00343 #define ZALLOC(strm, items, size) \
00344            (*((strm)->zalloc))((strm)->opaque, (items), (size))
00345 #define ZFREE(strm, addr)  (*((strm)->zfree))((strm)->opaque, (void*)(addr))
00346 #define TRY_FREE(s, p) {if (p) ZFREE(s, p);}
00347 
00348 
00349 #endif  // INC_ZIPUTIL
00350 
00351 

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