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 fprintf(stderr, "%s\n", m); 131 exit(1); 132 } 133 #endif 134 135 /* exported to allow conversion of error code to string for compress() and 136 * uncompress() 137 */ 138 const 139 char* 140 zError(int err) 141 { 142 return ERR_MSG(err); 143 } 144 145 #ifndef HAVE_MEMCPY 146 147 void 148 ZLIB_INTERNAL 149 zmemcpy(Bytef* dest, const Bytef* source, uInt len) 150 { 151 if (len == 0) return; 152 do { 153 *dest++ = *source++; /* ??? to be unrolled */ 154 } while (--len != 0); 155 } 156 157 int 158 ZLIB_INTERNAL 159 zmemcmp(const Bytef* s1, const Bytef* s2, uInt len) 160 { 161 uInt j; 162 163 for (j = 0; j < len; j++) { 164 if (s1[j] != s2[j]) return 2*(s1[j] > s2[j])-1; 165 } 166 return 0; 167 } 168 169 void 170 ZLIB_INTERNAL 171 zmemzero(Bytef* dest, uInt len) 172 { 173 if (len == 0) return; 174 do { 175 *dest++ = 0; /* ??? to be unrolled */ 176 } while (--len != 0); 177 } 178 #endif 179