1 /* 2 ** 2008 June 13 3 ** 4 ** The author disclaims copyright to this source code. In place of 5 ** a legal notice, here is a blessing: 6 ** 7 ** May you do good and not evil. 8 ** May you find forgiveness for yourself and forgive others. 9 ** May you share freely, never taking more than you give. 10 ** 11 ************************************************************************* 12 ** 13 ** This file contains definitions of global variables and constants. 14 */ 15 #include "sqliteInt.h" 16 17 /* An array to map all upper-case characters into their corresponding 18 ** lower-case character. 19 ** 20 ** SQLite only considers US-ASCII (or EBCDIC) characters. We do not 21 ** handle case conversions for the UTF character set since the tables 22 ** involved are nearly as big or bigger than SQLite itself. 23 */ 24 const unsigned char sqlite3UpperToLower[] = { 25 #ifdef SQLITE_ASCII 26 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 27 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 28 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 29 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 97, 98, 99,100,101,102,103, 30 104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121, 31 122, 91, 92, 93, 94, 95, 96, 97, 98, 99,100,101,102,103,104,105,106,107, 32 108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125, 33 126,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143, 34 144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,160,161, 35 162,163,164,165,166,167,168,169,170,171,172,173,174,175,176,177,178,179, 36 180,181,182,183,184,185,186,187,188,189,190,191,192,193,194,195,196,197, 37 198,199,200,201,202,203,204,205,206,207,208,209,210,211,212,213,214,215, 38 216,217,218,219,220,221,222,223,224,225,226,227,228,229,230,231,232,233, 39 234,235,236,237,238,239,240,241,242,243,244,245,246,247,248,249,250,251, 40 252,253,254,255 41 #endif 42 #ifdef SQLITE_EBCDIC 43 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, /* 0x */ 44 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, /* 1x */ 45 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, /* 2x */ 46 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, /* 3x */ 47 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, /* 4x */ 48 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, /* 5x */ 49 96, 97, 98, 99,100,101,102,103,104,105,106,107,108,109,110,111, /* 6x */ 50 112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127, /* 7x */ 51 128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143, /* 8x */ 52 144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159, /* 9x */ 53 160,161,162,163,164,165,166,167,168,169,170,171,140,141,142,175, /* Ax */ 54 176,177,178,179,180,181,182,183,184,185,186,187,188,189,190,191, /* Bx */ 55 192,129,130,131,132,133,134,135,136,137,202,203,204,205,206,207, /* Cx */ 56 208,145,146,147,148,149,150,151,152,153,218,219,220,221,222,223, /* Dx */ 57 224,225,162,163,164,165,166,167,168,169,234,235,236,237,238,239, /* Ex */ 58 240,241,242,243,244,245,246,247,248,249,250,251,252,253,254,255, /* Fx */ 59 #endif 60 }; 61 62 /* 63 ** The following 256 byte lookup table is used to support SQLites built-in 64 ** equivalents to the following standard library functions: 65 ** 66 ** isspace() 0x01 67 ** isalpha() 0x02 68 ** isdigit() 0x04 69 ** isalnum() 0x06 70 ** isxdigit() 0x08 71 ** toupper() 0x20 72 ** SQLite identifier character 0x40 73 ** Quote character 0x80 74 ** 75 ** Bit 0x20 is set if the mapped character requires translation to upper 76 ** case. i.e. if the character is a lower-case ASCII character. 77 ** If x is a lower-case ASCII character, then its upper-case equivalent 78 ** is (x - 0x20). Therefore toupper() can be implemented as: 79 ** 80 ** (x & ~(map[x]&0x20)) 81 ** 82 ** The equivalent of tolower() is implemented using the sqlite3UpperToLower[] 83 ** array. tolower() is used more often than toupper() by SQLite. 84 ** 85 ** Bit 0x40 is set if the character is non-alphanumeric and can be used in an 86 ** SQLite identifier. Identifiers are alphanumerics, "_", "$", and any 87 ** non-ASCII UTF character. Hence the test for whether or not a character is 88 ** part of an identifier is 0x46. 89 */ 90 #ifdef SQLITE_ASCII 91 const unsigned char sqlite3CtypeMap[256] = { 92 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 00..07 ........ */ 93 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x00, 0x00, /* 08..0f ........ */ 94 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 10..17 ........ */ 95 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 18..1f ........ */ 96 0x01, 0x00, 0x80, 0x00, 0x40, 0x00, 0x00, 0x80, /* 20..27 !"#$%&' */ 97 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 28..2f ()*+,-./ */ 98 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, /* 30..37 01234567 */ 99 0x0c, 0x0c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 38..3f 89:;<=>? */ 100 101 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x02, /* 40..47 @ABCDEFG */ 102 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, /* 48..4f HIJKLMNO */ 103 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, /* 50..57 PQRSTUVW */ 104 0x02, 0x02, 0x02, 0x80, 0x00, 0x00, 0x00, 0x40, /* 58..5f XYZ[\]^_ */ 105 0x80, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x22, /* 60..67 `abcdefg */ 106 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, /* 68..6f hijklmno */ 107 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, /* 70..77 pqrstuvw */ 108 0x22, 0x22, 0x22, 0x00, 0x00, 0x00, 0x00, 0x00, /* 78..7f xyz{|}~. */ 109 110 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, /* 80..87 ........ */ 111 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, /* 88..8f ........ */ 112 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, /* 90..97 ........ */ 113 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, /* 98..9f ........ */ 114 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, /* a0..a7 ........ */ 115 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, /* a8..af ........ */ 116 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, /* b0..b7 ........ */ 117 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, /* b8..bf ........ */ 118 119 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, /* c0..c7 ........ */ 120 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, /* c8..cf ........ */ 121 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, /* d0..d7 ........ */ 122 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, /* d8..df ........ */ 123 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, /* e0..e7 ........ */ 124 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, /* e8..ef ........ */ 125 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, /* f0..f7 ........ */ 126 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40 /* f8..ff ........ */ 127 }; 128 #endif 129 130 /* EVIDENCE-OF: R-02982-34736 In order to maintain full backwards 131 ** compatibility for legacy applications, the URI filename capability is 132 ** disabled by default. 133 ** 134 ** EVIDENCE-OF: R-38799-08373 URI filenames can be enabled or disabled 135 ** using the SQLITE_USE_URI=1 or SQLITE_USE_URI=0 compile-time options. 136 ** 137 ** EVIDENCE-OF: R-43642-56306 By default, URI handling is globally 138 ** disabled. The default value may be changed by compiling with the 139 ** SQLITE_USE_URI symbol defined. 140 ** 141 ** URI filenames are enabled by default if SQLITE_HAS_CODEC is 142 ** enabled. 143 */ 144 #ifndef SQLITE_USE_URI 145 # ifdef SQLITE_HAS_CODEC 146 # define SQLITE_USE_URI 1 147 # else 148 # define SQLITE_USE_URI 0 149 # endif 150 #endif 151 152 /* EVIDENCE-OF: R-38720-18127 The default setting is determined by the 153 ** SQLITE_ALLOW_COVERING_INDEX_SCAN compile-time option, or is "on" if 154 ** that compile-time option is omitted. 155 */ 156 #ifndef SQLITE_ALLOW_COVERING_INDEX_SCAN 157 # define SQLITE_ALLOW_COVERING_INDEX_SCAN 1 158 #endif 159 160 /* The minimum PMA size is set to this value multiplied by the database 161 ** page size in bytes. 162 */ 163 #ifndef SQLITE_SORTER_PMASZ 164 # define SQLITE_SORTER_PMASZ 250 165 #endif 166 167 /* Statement journals spill to disk when their size exceeds the following 168 ** threshold (in bytes). 0 means that statement journals are created and 169 ** written to disk immediately (the default behavior for SQLite versions 170 ** before 3.12.0). -1 means always keep the entire statement journal in 171 ** memory. (The statement journal is also always held entirely in memory 172 ** if journal_mode=MEMORY or if temp_store=MEMORY, regardless of this 173 ** setting.) 174 */ 175 #ifndef SQLITE_STMTJRNL_SPILL 176 # define SQLITE_STMTJRNL_SPILL (64*1024) 177 #endif 178 179 /* 180 ** The default lookaside-configuration, the format "SZ,N". SZ is the 181 ** number of bytes in each lookaside slot (should be a multiple of 8) 182 ** and N is the number of slots. The lookaside-configuration can be 183 ** changed as start-time using sqlite3_config(SQLITE_CONFIG_LOOKASIDE) 184 ** or at run-time for an individual database connection using 185 ** sqlite3_db_config(db, SQLITE_DBCONFIG_LOOKASIDE); 186 */ 187 #ifndef SQLITE_DEFAULT_LOOKASIDE 188 # define SQLITE_DEFAULT_LOOKASIDE 1200,100 189 #endif 190 191 192 /* The default maximum size of an in-memory database created using 193 ** sqlite3_deserialize() 194 */ 195 #ifndef SQLITE_MEMDB_DEFAULT_MAXSIZE 196 # define SQLITE_MEMDB_DEFAULT_MAXSIZE 1073741824 197 #endif 198 199 /* 200 ** The following singleton contains the global configuration for 201 ** the SQLite library. 202 */ 203 SQLITE_WSD struct Sqlite3Config sqlite3Config = { 204 SQLITE_DEFAULT_MEMSTATUS, /* bMemstat */ 205 1, /* bCoreMutex */ 206 SQLITE_THREADSAFE==1, /* bFullMutex */ 207 SQLITE_USE_URI, /* bOpenUri */ 208 SQLITE_ALLOW_COVERING_INDEX_SCAN, /* bUseCis */ 209 0, /* bSmallMalloc */ 210 0x7ffffffe, /* mxStrlen */ 211 0, /* neverCorrupt */ 212 SQLITE_DEFAULT_LOOKASIDE, /* szLookaside, nLookaside */ 213 SQLITE_STMTJRNL_SPILL, /* nStmtSpill */ 214 {0,0,0,0,0,0,0,0}, /* m */ 215 {0,0,0,0,0,0,0,0,0}, /* mutex */ 216 {0,0,0,0,0,0,0,0,0,0,0,0,0},/* pcache2 */ 217 (void*)0, /* pHeap */ 218 0, /* nHeap */ 219 0, 0, /* mnHeap, mxHeap */ 220 SQLITE_DEFAULT_MMAP_SIZE, /* szMmap */ 221 SQLITE_MAX_MMAP_SIZE, /* mxMmap */ 222 (void*)0, /* pPage */ 223 0, /* szPage */ 224 SQLITE_DEFAULT_PCACHE_INITSZ, /* nPage */ 225 0, /* mxParserStack */ 226 0, /* sharedCacheEnabled */ 227 SQLITE_SORTER_PMASZ, /* szPma */ 228 /* All the rest should always be initialized to zero */ 229 0, /* isInit */ 230 0, /* inProgress */ 231 0, /* isMutexInit */ 232 0, /* isMallocInit */ 233 0, /* isPCacheInit */ 234 0, /* nRefInitMutex */ 235 0, /* pInitMutex */ 236 0, /* xLog */ 237 0, /* pLogArg */ 238 #ifdef SQLITE_ENABLE_SQLLOG 239 0, /* xSqllog */ 240 0, /* pSqllogArg */ 241 #endif 242 #ifdef SQLITE_VDBE_COVERAGE 243 0, /* xVdbeBranch */ 244 0, /* pVbeBranchArg */ 245 #endif 246 #ifdef SQLITE_ENABLE_DESERIALIZE 247 SQLITE_MEMDB_DEFAULT_MAXSIZE, /* mxMemdbSize */ 248 #endif 249 #ifndef SQLITE_UNTESTABLE 250 0, /* xTestCallback */ 251 #endif 252 0, /* bLocaltimeFault */ 253 0, /* bInternalFunctions */ 254 0x7ffffffe, /* iOnceResetThreshold */ 255 SQLITE_DEFAULT_SORTERREF_SIZE, /* szSorterRef */ 256 }; 257 258 /* 259 ** Hash table for global functions - functions common to all 260 ** database connections. After initialization, this table is 261 ** read-only. 262 */ 263 FuncDefHash sqlite3BuiltinFunctions; 264 265 /* 266 ** Constant tokens for values 0 and 1. 267 */ 268 const Token sqlite3IntTokens[] = { 269 { "0", 1 }, 270 { "1", 1 } 271 }; 272 273 #ifdef VDBE_PROFILE 274 /* 275 ** The following performance counter can be used in place of 276 ** sqlite3Hwtime() for profiling. This is a no-op on standard builds. 277 */ 278 sqlite3_uint64 sqlite3NProfileCnt = 0; 279 #endif 280 281 /* 282 ** The value of the "pending" byte must be 0x40000000 (1 byte past the 283 ** 1-gibabyte boundary) in a compatible database. SQLite never uses 284 ** the database page that contains the pending byte. It never attempts 285 ** to read or write that page. The pending byte page is set aside 286 ** for use by the VFS layers as space for managing file locks. 287 ** 288 ** During testing, it is often desirable to move the pending byte to 289 ** a different position in the file. This allows code that has to 290 ** deal with the pending byte to run on files that are much smaller 291 ** than 1 GiB. The sqlite3_test_control() interface can be used to 292 ** move the pending byte. 293 ** 294 ** IMPORTANT: Changing the pending byte to any value other than 295 ** 0x40000000 results in an incompatible database file format! 296 ** Changing the pending byte during operation will result in undefined 297 ** and incorrect behavior. 298 */ 299 #ifndef SQLITE_OMIT_WSD 300 int sqlite3PendingByte = 0x40000000; 301 #endif 302 303 #include "opcodes.h" 304 /* 305 ** Properties of opcodes. The OPFLG_INITIALIZER macro is 306 ** created by mkopcodeh.awk during compilation. Data is obtained 307 ** from the comments following the "case OP_xxxx:" statements in 308 ** the vdbe.c file. 309 */ 310 const unsigned char sqlite3OpcodeProperty[] = OPFLG_INITIALIZER; 311 312 /* 313 ** Name of the default collating sequence 314 */ 315 const char sqlite3StrBINARY[] = "BINARY"; 316