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 H2_ZLIB_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 H2_ZLIB_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 183