AppPkg/Applications/Python/Python-2.7.10/PyMod-2.7.10/Modules/zlib/gzguts.h

   1 /* gzguts.h -- zlib internal header definitions for gz* operations
   2  * Copyright (c) 2015, Daryl McDaniel. All rights reserved.<BR>
   3  * Copyright (C) 2004, 2005, 2010, 2011, 2012, 2013 Mark Adler
   4  * For conditions of distribution and use, see copyright notice in zlib.h
   5  */
   6
   7 #ifdef _LARGEFILE64_SOURCE
   8 #  ifndef _LARGEFILE_SOURCE
   9 #    define _LARGEFILE_SOURCE 1
  10 #  endif
  11 #  ifdef _FILE_OFFSET_BITS
  12 #    undef _FILE_OFFSET_BITS
  13 #  endif
  14 #endif
  15
  16 #ifdef HAVE_HIDDEN
  17 #  define ZLIB_INTERNAL __attribute__((visibility ("hidden")))
  18 #else
  19 #  define ZLIB_INTERNAL
  20 #endif
  21
  22 #include <stdio.h>
  23 #include "zlib.h"
  24 #ifdef STDC
  25 #  include <string.h>
  26 #  include <stdlib.h>
  27 #  include <limits.h>
  28 #endif
  29 #include <fcntl.h>
  30
  31 #ifdef _WIN32
  32 #  include <stddef.h>
  33 #endif
  34
  35 #if (defined(__TURBOC__) || defined(_MSC_VER) || defined(_WIN32)) && !defined(UEFI_C_SOURCE)
  36 #  include <io.h>
  37 #endif
  38
  39 #ifdef WINAPI_FAMILY
  40 #  define open _open
  41 #  define read _read
  42 #  define write _write
  43 #  define close _close
  44 #endif
  45
  46 // Needed to get the declarations for open, read, write, close
  47 #ifdef  UEFI_C_SOURCE
  48 # include <unistd.h>
  49 #endif
  50
  51 #ifdef NO_DEFLATE       /* for compatibility with old definition */
  52 #  define NO_GZCOMPRESS
  53 #endif
  54
  55 #if defined(STDC99) || (defined(__TURBOC__) && __TURBOC__ >= 0x550)
  56 #  ifndef HAVE_VSNPRINTF
  57 #    define HAVE_VSNPRINTF
  58 #  endif
  59 #endif
  60
  61 #if defined(__CYGWIN__)
  62 #  ifndef HAVE_VSNPRINTF
  63 #    define HAVE_VSNPRINTF
  64 #  endif
  65 #endif
  66
  67 #if defined(MSDOS) && defined(__BORLANDC__) && (BORLANDC > 0x410)
  68 #  ifndef HAVE_VSNPRINTF
  69 #    define HAVE_VSNPRINTF
  70 #  endif
  71 #endif
  72
  73 #ifndef HAVE_VSNPRINTF
  74 #  ifdef MSDOS
  75 /* vsnprintf may exist on some MS-DOS compilers (DJGPP?),
  76    but for now we just assume it doesn't. */
  77 #    define NO_vsnprintf
  78 #  endif
  79 #  ifdef __TURBOC__
  80 #    define NO_vsnprintf
  81 #  endif
  82 #  ifdef WIN32
  83 /* In Win32, vsnprintf is available as the "non-ANSI" _vsnprintf. */
  84 #    if !defined(vsnprintf) && !defined(NO_vsnprintf)
  85 #      if !defined(_MSC_VER) || ( defined(_MSC_VER) && _MSC_VER < 1500 )
  86 #         define vsnprintf _vsnprintf
  87 #      endif
  88 #    endif
  89 #  endif
  90 #  ifdef __SASC
  91 #    define NO_vsnprintf
  92 #  endif
  93 #  ifdef VMS
  94 #    define NO_vsnprintf
  95 #  endif
  96 #  ifdef __OS400__
  97 #    define NO_vsnprintf
  98 #  endif
  99 #  ifdef __MVS__
 100 #    define NO_vsnprintf
 101 #  endif
 102 #endif
 103
 104 /* unlike snprintf (which is required in C99, yet still not supported by
 105    Microsoft more than a decade later!), _snprintf does not guarantee null
 106    termination of the result -- however this is only used in gzlib.c where
 107    the result is assured to fit in the space provided */
 108 #if defined(_MSC_VER) && !defined(UEFI_C_SOURCE)
 109 #  define snprintf _snprintf
 110 #endif
 111
 112 #ifndef local
 113 #  define local static
 114 #endif
 115 /* compile with -Dlocal if your debugger can't find static symbols */
 116
 117 /* gz* functions always use library allocation functions */
 118 #ifndef STDC
 119   extern voidp  malloc OF((uInt size));
 120   extern void   free   OF((voidpf ptr));
 121 #endif
 122
 123 /* get errno and strerror definition */
 124 #if defined UNDER_CE
 125 #  include <windows.h>
 126 #  define zstrerror() gz_strwinerror((DWORD)GetLastError())
 127 #else
 128 #  ifndef NO_STRERROR
 129 #    include <errno.h>
 130 #    define zstrerror() strerror(errno)
 131 #  else
 132 #    define zstrerror() "stdio error (consult errno)"
 133 #  endif
 134 #endif
 135
 136 /* provide prototypes for these when building zlib without LFS */
 137 #if !defined(_LARGEFILE64_SOURCE) || _LFS64_LARGEFILE-0 == 0
 138     ZEXTERN gzFile ZEXPORT gzopen64 OF((const char *, const char *));
 139     ZEXTERN z_off64_t ZEXPORT gzseek64 OF((gzFile, z_off64_t, int));
 140     ZEXTERN z_off64_t ZEXPORT gztell64 OF((gzFile));
 141     ZEXTERN z_off64_t ZEXPORT gzoffset64 OF((gzFile));
 142 #endif
 143
 144 /* default memLevel */
 145 #if MAX_MEM_LEVEL >= 8
 146 #  define DEF_MEM_LEVEL 8
 147 #else
 148 #  define DEF_MEM_LEVEL  MAX_MEM_LEVEL
 149 #endif
 150
 151 /* default i/o buffer size -- double this for output when reading (this and
 152    twice this must be able to fit in an unsigned type) */
 153 #define GZBUFSIZE 8192
 154
 155 /* gzip modes, also provide a little integrity check on the passed structure */
 156 #define GZ_NONE 0
 157 #define GZ_READ 7247
 158 #define GZ_WRITE 31153
 159 #define GZ_APPEND 1     /* mode set to GZ_WRITE after the file is opened */
 160
 161 /* values for gz_state how */
 162 #define LOOK 0      /* look for a gzip header */
 163 #define COPY 1      /* copy input directly */
 164 #define GZIP 2      /* decompress a gzip stream */
 165
 166 /* internal gzip file state data structure */
 167 typedef struct {
 168         /* exposed contents for gzgetc() macro */
 169     struct gzFile_s x;      /* "x" for exposed */
 170                             /* x.have: number of bytes available at x.next */
 171                             /* x.next: next output data to deliver or write */
 172                             /* x.pos: current position in uncompressed data */
 173         /* used for both reading and writing */
 174     int mode;               /* see gzip modes above */
 175     int fd;                 /* file descriptor */
 176     char *path;             /* path or fd for error messages */
 177     unsigned size;          /* buffer size, zero if not allocated yet */
 178     unsigned want;          /* requested buffer size, default is GZBUFSIZE */
 179     unsigned char *in;      /* input buffer */
 180     unsigned char *out;     /* output buffer (double-sized when reading) */
 181     int direct;             /* 0 if processing gzip, 1 if transparent */
 182         /* just for reading */
 183     int how;                /* 0: get header, 1: copy, 2: decompress */
 184     z_off64_t start;        /* where the gzip data started, for rewinding */
 185     int eof;                /* true if end of input file reached */
 186     int past;               /* true if read requested past end */
 187         /* just for writing */
 188     int level;              /* compression level */
 189     int strategy;           /* compression strategy */
 190         /* seek request */
 191     z_off64_t skip;         /* amount to skip (already rewound if backwards) */
 192     int seek;               /* true if seek request pending */
 193         /* error information */
 194     int err;                /* error code */
 195     char *msg;              /* error message */
 196         /* zlib inflate or deflate stream */
 197     z_stream strm;          /* stream structure in-place (not a pointer) */
 198 } gz_state;
 199 typedef gz_state FAR *gz_statep;
 200
 201 /* shared functions */
 202 void ZLIB_INTERNAL gz_error OF((gz_statep, int, const char *));
 203 #if defined UNDER_CE
 204 char ZLIB_INTERNAL *gz_strwinerror OF((DWORD error));
 205 #endif
 206
 207 /* GT_OFF(x), where x is an unsigned value, is true if x > maximum z_off64_t
 208    value -- needed when comparing unsigned to z_off64_t, which is signed
 209    (possible z_off64_t types off_t, off64_t, and long are all signed) */
 210 #ifdef INT_MAX
 211 #  define GT_OFF(x) (sizeof(int) == sizeof(z_off64_t) && (x) > INT_MAX)
 212 #else
 213 unsigned ZLIB_INTERNAL gz_intmax OF((void));
 214 #  define GT_OFF(x) (sizeof(int) == sizeof(z_off64_t) && (x) > gz_intmax())
 215 #endif