sys/vfs/hammer2/zlib/hammer2_zlib_zutil.c

   1 /* zutil.c -- target dependent utility functions for the compression library
   2  * Copyright (C) 1995-2005, 2010, 2011, 2012 Jean-loup Gailly.
   3  * For conditions of distribution and use, see copyright notice in zlib.h
   4  */
   5
   6 /* @(#) $Id$ */
   7
   8 #include "hammer2_zlib_zutil.h"
   9
  10 #ifndef NO_DUMMY_DECL
  11 struct internal_state      {int dummy;}; /* for buggy compilers */
  12 #endif
  13
  14 z_const char * const z_errmsg[10] = {
  15 "need dictionary",     /* Z_NEED_DICT       2  */
  16 "stream end",          /* Z_STREAM_END      1  */
  17 "",                    /* Z_OK              0  */
  18 "file error",          /* Z_ERRNO         (-1) */
  19 "stream error",        /* Z_STREAM_ERROR  (-2) */
  20 "data error",          /* Z_DATA_ERROR    (-3) */
  21 "insufficient memory", /* Z_MEM_ERROR     (-4) */
  22 "buffer error",        /* Z_BUF_ERROR     (-5) */
  23 "incompatible version",/* Z_VERSION_ERROR (-6) */
  24 ""};
  25
  26 const char * zlibVersion(void);
  27 uLong zlibCompileFlags(void);
  28 const char * zError(int err);
  29
  30 const
  31 char*
  32 zlibVersion(void)
  33 {
  34     return ZLIB_VERSION;
  35 }
  36
  37 uLong
  38 zlibCompileFlags(void)
  39 {
  40     uLong flags;
  41
  42     flags = 0;
  43     switch ((int)(sizeof(uInt))) {
  44     case 2:     break;
  45     case 4:     flags += 1;     break;
  46     case 8:     flags += 2;     break;
  47     default:    flags += 3;
  48     }
  49     switch ((int)(sizeof(uLong))) {
  50     case 2:     break;
  51     case 4:     flags += 1 << 2;        break;
  52     case 8:     flags += 2 << 2;        break;
  53     default:    flags += 3 << 2;
  54     }
  55     switch ((int)(sizeof(voidpf))) {
  56     case 2:     break;
  57     case 4:     flags += 1 << 4;        break;
  58     case 8:     flags += 2 << 4;        break;
  59     default:    flags += 3 << 4;
  60     }
  61     switch ((int)(sizeof(z_off_t))) {
  62     case 2:     break;
  63     case 4:     flags += 1 << 6;        break;
  64     case 8:     flags += 2 << 6;        break;
  65     default:    flags += 3 << 6;
  66     }
  67 #ifdef DEBUG
  68     flags += 1 << 8;
  69 #endif
  70 #if defined(ASMV) || defined(ASMINF)
  71     flags += 1 << 9;
  72 #endif
  73 #ifdef ZLIB_WINAPI
  74     flags += 1 << 10;
  75 #endif
  76 #ifdef BUILDFIXED
  77     flags += 1 << 12;
  78 #endif
  79 #ifdef DYNAMIC_CRC_TABLE
  80     flags += 1 << 13;
  81 #endif
  82 #ifdef NO_GZCOMPRESS
  83     flags += 1L << 16;
  84 #endif
  85 #ifdef NO_GZIP
  86     flags += 1L << 17;
  87 #endif
  88 #ifdef PKZIP_BUG_WORKAROUND
  89     flags += 1L << 20;
  90 #endif
  91 #ifdef FASTEST
  92     flags += 1L << 21;
  93 #endif
  94 #if defined(STDC) || defined(Z_HAVE_STDARG_H)
  95 #  ifdef NO_vsnprintf
  96     flags += 1L << 25;
  97 #    ifdef HAS_vsprintf_void
  98     flags += 1L << 26;
  99 #    endif
 100 #  else
 101 #    ifdef HAS_vsnprintf_void
 102     flags += 1L << 26;
 103 #    endif
 104 #  endif
 105 #else
 106     flags += 1L << 24;
 107 #  ifdef NO_snprintf
 108     flags += 1L << 25;
 109 #    ifdef HAS_sprintf_void
 110     flags += 1L << 26;
 111 #    endif
 112 #  else
 113 #    ifdef HAS_snprintf_void
 114     flags += 1L << 26;
 115 #    endif
 116 #  endif
 117 #endif
 118     return flags;
 119 }
 120
 121 #ifdef DEBUG
 122
 123 #  ifndef verbose
 124 #    define verbose 0
 125 #  endif
 126 int ZLIB_INTERNAL z_verbose = verbose;
 127
 128 void ZLIB_INTERNAL z_error (char *m)
 129 {
 130 #if defined(_KERNEL)
 131     panic("h2 %s: %s", __func__, m);
 132 #else
 133     fprintf(stderr, "%s\n", m);
 134     exit(1);
 135 #endif
 136 }
 137 #endif
 138
 139 /* exported to allow conversion of error code to string for compress() and
 140  * uncompress()
 141  */
 142 const
 143 char*
 144 zError(int err)
 145 {
 146     return ERR_MSG(err);
 147 }
 148
 149 #ifndef HAVE_MEMCPY
 150
 151 void
 152 ZLIB_INTERNAL
 153 zmemcpy(Bytef* dest, const Bytef* source, uInt  len)
 154 {
 155     if (len == 0) return;
 156     do {
 157         *dest++ = *source++; /* ??? to be unrolled */
 158     } while (--len != 0);
 159 }
 160
 161 int
 162 ZLIB_INTERNAL
 163 zmemcmp(const Bytef* s1, const Bytef* s2, uInt len)
 164 {
 165     uInt j;
 166
 167     for (j = 0; j < len; j++) {
 168         if (s1[j] != s2[j]) return 2*(s1[j] > s2[j])-1;
 169     }
 170     return 0;
 171 }
 172
 173 void
 174 ZLIB_INTERNAL
 175 zmemzero(Bytef* dest, uInt len)
 176 {
 177     if (len == 0) return;
 178     do {
 179         *dest++ = 0;  /* ??? to be unrolled */
 180     } while (--len != 0);
 181 }
 182 #endif