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 following singleton contains the global configuration for 174 ** the SQLite library. 175 */ 176 SQLITE_WSD struct Sqlite3Config sqlite3Config = { 177 SQLITE_DEFAULT_MEMSTATUS, /* bMemstat */ 178 1, /* bCoreMutex */ 179 SQLITE_THREADSAFE==1, /* bFullMutex */ 180 SQLITE_USE_URI, /* bOpenUri */ 181 SQLITE_ALLOW_COVERING_INDEX_SCAN, /* bUseCis */ 182 0x7ffffffe, /* mxStrlen */ 183 0, /* neverCorrupt */ 184 128, /* szLookaside */ 185 500, /* nLookaside */ 186 SQLITE_STMTJRNL_SPILL, /* nStmtSpill */ 187 {0,0,0,0,0,0,0,0}, /* m */ 188 {0,0,0,0,0,0,0,0,0}, /* mutex */ 189 {0,0,0,0,0,0,0,0,0,0,0,0,0},/* pcache2 */ 190 (void*)0, /* pHeap */ 191 0, /* nHeap */ 192 0, 0, /* mnHeap, mxHeap */ 193 SQLITE_DEFAULT_MMAP_SIZE, /* szMmap */ 194 SQLITE_MAX_MMAP_SIZE, /* mxMmap */ 195 (void*)0, /* pScratch */ 196 0, /* szScratch */ 197 0, /* nScratch */ 198 (void*)0, /* pPage */ 199 0, /* szPage */ 200 SQLITE_DEFAULT_PCACHE_INITSZ, /* nPage */ 201 0, /* mxParserStack */ 202 0, /* sharedCacheEnabled */ 203 SQLITE_SORTER_PMASZ, /* szPma */ 204 /* All the rest should always be initialized to zero */ 205 0, /* isInit */ 206 0, /* inProgress */ 207 0, /* isMutexInit */ 208 0, /* isMallocInit */ 209 0, /* isPCacheInit */ 210 0, /* nRefInitMutex */ 211 0, /* pInitMutex */ 212 0, /* xLog */ 213 0, /* pLogArg */ 214 #ifdef SQLITE_ENABLE_SQLLOG 215 0, /* xSqllog */ 216 0, /* pSqllogArg */ 217 #endif 218 #ifdef SQLITE_VDBE_COVERAGE 219 0, /* xVdbeBranch */ 220 0, /* pVbeBranchArg */ 221 #endif 222 #ifndef SQLITE_OMIT_BUILTIN_TEST 223 0, /* xTestCallback */ 224 #endif 225 0, /* bLocaltimeFault */ 226 0x7ffffffe /* iOnceResetThreshold */ 227 }; 228 229 /* 230 ** Hash table for global functions - functions common to all 231 ** database connections. After initialization, this table is 232 ** read-only. 233 */ 234 FuncDefHash sqlite3BuiltinFunctions; 235 236 /* 237 ** Constant tokens for values 0 and 1. 238 */ 239 const Token sqlite3IntTokens[] = { 240 { "0", 1 }, 241 { "1", 1 } 242 }; 243 244 245 /* 246 ** The value of the "pending" byte must be 0x40000000 (1 byte past the 247 ** 1-gibabyte boundary) in a compatible database. SQLite never uses 248 ** the database page that contains the pending byte. It never attempts 249 ** to read or write that page. The pending byte page is set aside 250 ** for use by the VFS layers as space for managing file locks. 251 ** 252 ** During testing, it is often desirable to move the pending byte to 253 ** a different position in the file. This allows code that has to 254 ** deal with the pending byte to run on files that are much smaller 255 ** than 1 GiB. The sqlite3_test_control() interface can be used to 256 ** move the pending byte. 257 ** 258 ** IMPORTANT: Changing the pending byte to any value other than 259 ** 0x40000000 results in an incompatible database file format! 260 ** Changing the pending byte during operation will result in undefined 261 ** and incorrect behavior. 262 */ 263 #ifndef SQLITE_OMIT_WSD 264 int sqlite3PendingByte = 0x40000000; 265 #endif 266 267 #include "opcodes.h" 268 /* 269 ** Properties of opcodes. The OPFLG_INITIALIZER macro is 270 ** created by mkopcodeh.awk during compilation. Data is obtained 271 ** from the comments following the "case OP_xxxx:" statements in 272 ** the vdbe.c file. 273 */ 274 const unsigned char sqlite3OpcodeProperty[] = OPFLG_INITIALIZER; 275 276 /* 277 ** Name of the default collating sequence 278 */ 279 const char sqlite3StrBINARY[] = "BINARY"; 280