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 #ifndef SQLITE_USE_URI 142 # define SQLITE_USE_URI 0 143 #endif 144 145 /* EVIDENCE-OF: R-38720-18127 The default setting is determined by the 146 ** SQLITE_ALLOW_COVERING_INDEX_SCAN compile-time option, or is "on" if 147 ** that compile-time option is omitted. 148 */ 149 #ifndef SQLITE_ALLOW_COVERING_INDEX_SCAN 150 # define SQLITE_ALLOW_COVERING_INDEX_SCAN 1 151 #endif 152 153 /* The minimum PMA size is set to this value multiplied by the database 154 ** page size in bytes. 155 */ 156 #ifndef SQLITE_SORTER_PMASZ 157 # define SQLITE_SORTER_PMASZ 250 158 #endif 159 160 /* Statement journals spill to disk when their size exceeds the following 161 ** threshold (in bytes). 0 means that statement journals are created and 162 ** written to disk immediately (the default behavior for SQLite versions 163 ** before 3.12.0). -1 means always keep the entire statement journal in 164 ** memory. (The statement journal is also always held entirely in memory 165 ** if journal_mode=MEMORY or if temp_store=MEMORY, regardless of this 166 ** setting.) 167 */ 168 #ifndef SQLITE_STMTJRNL_SPILL 169 # define SQLITE_STMTJRNL_SPILL (64*1024) 170 #endif 171 172 /* 173 ** The default lookaside-configuration, the format "SZ,N". SZ is the 174 ** number of bytes in each lookaside slot (should be a multiple of 8) 175 ** and N is the number of slots. The lookaside-configuration can be 176 ** changed as start-time using sqlite3_config(SQLITE_CONFIG_LOOKASIDE) 177 ** or at run-time for an individual database connection using 178 ** sqlite3_db_config(db, SQLITE_DBCONFIG_LOOKASIDE); 179 */ 180 #ifndef SQLITE_DEFAULT_LOOKASIDE 181 # define SQLITE_DEFAULT_LOOKASIDE 1200,100 182 #endif 183 184 185 /* 186 ** The following singleton contains the global configuration for 187 ** the SQLite library. 188 */ 189 SQLITE_WSD struct Sqlite3Config sqlite3Config = { 190 SQLITE_DEFAULT_MEMSTATUS, /* bMemstat */ 191 1, /* bCoreMutex */ 192 SQLITE_THREADSAFE==1, /* bFullMutex */ 193 SQLITE_USE_URI, /* bOpenUri */ 194 SQLITE_ALLOW_COVERING_INDEX_SCAN, /* bUseCis */ 195 0x7ffffffe, /* mxStrlen */ 196 0, /* neverCorrupt */ 197 SQLITE_DEFAULT_LOOKASIDE, /* szLookaside, nLookaside */ 198 SQLITE_STMTJRNL_SPILL, /* nStmtSpill */ 199 {0,0,0,0,0,0,0,0}, /* m */ 200 {0,0,0,0,0,0,0,0,0}, /* mutex */ 201 {0,0,0,0,0,0,0,0,0,0,0,0,0},/* pcache2 */ 202 (void*)0, /* pHeap */ 203 0, /* nHeap */ 204 0, 0, /* mnHeap, mxHeap */ 205 SQLITE_DEFAULT_MMAP_SIZE, /* szMmap */ 206 SQLITE_MAX_MMAP_SIZE, /* mxMmap */ 207 (void*)0, /* pScratch */ 208 0, /* szScratch */ 209 0, /* nScratch */ 210 (void*)0, /* pPage */ 211 0, /* szPage */ 212 SQLITE_DEFAULT_PCACHE_INITSZ, /* nPage */ 213 0, /* mxParserStack */ 214 0, /* sharedCacheEnabled */ 215 SQLITE_SORTER_PMASZ, /* szPma */ 216 /* All the rest should always be initialized to zero */ 217 0, /* isInit */ 218 0, /* inProgress */ 219 0, /* isMutexInit */ 220 0, /* isMallocInit */ 221 0, /* isPCacheInit */ 222 0, /* nRefInitMutex */ 223 0, /* pInitMutex */ 224 0, /* xLog */ 225 0, /* pLogArg */ 226 #ifdef SQLITE_ENABLE_SQLLOG 227 0, /* xSqllog */ 228 0, /* pSqllogArg */ 229 #endif 230 #ifdef SQLITE_VDBE_COVERAGE 231 0, /* xVdbeBranch */ 232 0, /* pVbeBranchArg */ 233 #endif 234 #ifndef SQLITE_UNTESTABLE 235 0, /* xTestCallback */ 236 #endif 237 0, /* bLocaltimeFault */ 238 0x7ffffffe /* iOnceResetThreshold */ 239 }; 240 241 /* 242 ** Hash table for global functions - functions common to all 243 ** database connections. After initialization, this table is 244 ** read-only. 245 */ 246 FuncDefHash sqlite3BuiltinFunctions; 247 248 /* 249 ** Constant tokens for values 0 and 1. 250 */ 251 const Token sqlite3IntTokens[] = { 252 { "0", 1 }, 253 { "1", 1 } 254 }; 255 256 257 /* 258 ** The value of the "pending" byte must be 0x40000000 (1 byte past the 259 ** 1-gibabyte boundary) in a compatible database. SQLite never uses 260 ** the database page that contains the pending byte. It never attempts 261 ** to read or write that page. The pending byte page is set aside 262 ** for use by the VFS layers as space for managing file locks. 263 ** 264 ** During testing, it is often desirable to move the pending byte to 265 ** a different position in the file. This allows code that has to 266 ** deal with the pending byte to run on files that are much smaller 267 ** than 1 GiB. The sqlite3_test_control() interface can be used to 268 ** move the pending byte. 269 ** 270 ** IMPORTANT: Changing the pending byte to any value other than 271 ** 0x40000000 results in an incompatible database file format! 272 ** Changing the pending byte during operation will result in undefined 273 ** and incorrect behavior. 274 */ 275 #ifndef SQLITE_OMIT_WSD 276 int sqlite3PendingByte = 0x40000000; 277 #endif 278 279 #include "opcodes.h" 280 /* 281 ** Properties of opcodes. The OPFLG_INITIALIZER macro is 282 ** created by mkopcodeh.awk during compilation. Data is obtained 283 ** from the comments following the "case OP_xxxx:" statements in 284 ** the vdbe.c file. 285 */ 286 const unsigned char sqlite3OpcodeProperty[] = OPFLG_INITIALIZER; 287 288 /* 289 ** Name of the default collating sequence 290 */ 291 const char sqlite3StrBINARY[] = "BINARY"; 292