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 ** 74 ** Bit 0x20 is set if the mapped character requires translation to upper 75 ** case. i.e. if the character is a lower-case ASCII character. 76 ** If x is a lower-case ASCII character, then its upper-case equivalent 77 ** is (x - 0x20). Therefore toupper() can be implemented as: 78 ** 79 ** (x & ~(map[x]&0x20)) 80 ** 81 ** Standard function tolower() is implemented using the sqlite3UpperToLower[] 82 ** array. tolower() is used more often than toupper() by SQLite. 83 ** 84 ** Bit 0x40 is set if the character non-alphanumeric and can be used in an 85 ** SQLite identifier. Identifiers are alphanumerics, "_", "$", and any 86 ** non-ASCII UTF character. Hence the test for whether or not a character is 87 ** part of an identifier is 0x46. 88 ** 89 ** SQLite's versions are identical to the standard versions assuming a 90 ** locale of "C". They are implemented as macros in sqliteInt.h. 91 */ 92 #ifdef SQLITE_ASCII 93 const unsigned char sqlite3CtypeMap[256] = { 94 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 00..07 ........ */ 95 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x00, 0x00, /* 08..0f ........ */ 96 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 10..17 ........ */ 97 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 18..1f ........ */ 98 0x01, 0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x00, /* 20..27 !"#$%&' */ 99 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 28..2f ()*+,-./ */ 100 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, /* 30..37 01234567 */ 101 0x0c, 0x0c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 38..3f 89:;<=>? */ 102 103 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x02, /* 40..47 @ABCDEFG */ 104 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, /* 48..4f HIJKLMNO */ 105 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, /* 50..57 PQRSTUVW */ 106 0x02, 0x02, 0x02, 0x00, 0x00, 0x00, 0x00, 0x40, /* 58..5f XYZ[\]^_ */ 107 0x00, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x22, /* 60..67 `abcdefg */ 108 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, /* 68..6f hijklmno */ 109 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, /* 70..77 pqrstuvw */ 110 0x22, 0x22, 0x22, 0x00, 0x00, 0x00, 0x00, 0x00, /* 78..7f xyz{|}~. */ 111 112 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, /* 80..87 ........ */ 113 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, /* 88..8f ........ */ 114 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, /* 90..97 ........ */ 115 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, /* 98..9f ........ */ 116 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, /* a0..a7 ........ */ 117 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, /* a8..af ........ */ 118 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, /* b0..b7 ........ */ 119 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, /* b8..bf ........ */ 120 121 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, /* c0..c7 ........ */ 122 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, /* c8..cf ........ */ 123 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, /* d0..d7 ........ */ 124 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, /* d8..df ........ */ 125 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, /* e0..e7 ........ */ 126 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, /* e8..ef ........ */ 127 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, /* f0..f7 ........ */ 128 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40 /* f8..ff ........ */ 129 }; 130 #endif 131 132 /* EVIDENCE-OF: R-02982-34736 In order to maintain full backwards 133 ** compatibility for legacy applications, the URI filename capability is 134 ** disabled by default. 135 ** 136 ** EVIDENCE-OF: R-38799-08373 URI filenames can be enabled or disabled 137 ** using the SQLITE_USE_URI=1 or SQLITE_USE_URI=0 compile-time options. 138 ** 139 ** EVIDENCE-OF: R-43642-56306 By default, URI handling is globally 140 ** disabled. The default value may be changed by compiling with the 141 ** SQLITE_USE_URI symbol defined. 142 */ 143 #ifndef SQLITE_USE_URI 144 # define SQLITE_USE_URI 0 145 #endif 146 147 /* EVIDENCE-OF: R-38720-18127 The default setting is determined by the 148 ** SQLITE_ALLOW_COVERING_INDEX_SCAN compile-time option, or is "on" if 149 ** that compile-time option is omitted. 150 */ 151 #ifndef SQLITE_ALLOW_COVERING_INDEX_SCAN 152 # define SQLITE_ALLOW_COVERING_INDEX_SCAN 1 153 #endif 154 155 /* The minimum PMA size is set to this value multiplied by the database 156 ** page size in bytes. 157 */ 158 #ifndef SQLITE_SORTER_PMASZ 159 # define SQLITE_SORTER_PMASZ 250 160 #endif 161 162 /* Statement journals spill to disk when their size exceeds the following 163 ** threashold (in bytes). 0 means that statement journals are created and 164 ** written to disk immediately (the default behavior for SQLite versions 165 ** before 3.12.0). -1 means always keep the entire statement journal in 166 ** memory. (The statement journal is also always held entirely in memory 167 ** if journal_mode=MEMORY or if temp_store=MEMORY, regardless of this 168 ** setting.) 169 */ 170 #ifndef SQLITE_STMTJRNL_SPILL 171 # define SQLITE_STMTJRNL_SPILL (64*1024) 172 #endif 173 174 /* 175 ** The following singleton contains the global configuration for 176 ** the SQLite library. 177 */ 178 SQLITE_WSD struct Sqlite3Config sqlite3Config = { 179 SQLITE_DEFAULT_MEMSTATUS, /* bMemstat */ 180 1, /* bCoreMutex */ 181 SQLITE_THREADSAFE==1, /* bFullMutex */ 182 SQLITE_USE_URI, /* bOpenUri */ 183 SQLITE_ALLOW_COVERING_INDEX_SCAN, /* bUseCis */ 184 0x7ffffffe, /* mxStrlen */ 185 0, /* neverCorrupt */ 186 128, /* szLookaside */ 187 500, /* nLookaside */ 188 SQLITE_STMTJRNL_SPILL, /* nStmtSpill */ 189 {0,0,0,0,0,0,0,0}, /* m */ 190 {0,0,0,0,0,0,0,0,0}, /* mutex */ 191 {0,0,0,0,0,0,0,0,0,0,0,0,0},/* pcache2 */ 192 (void*)0, /* pHeap */ 193 0, /* nHeap */ 194 0, 0, /* mnHeap, mxHeap */ 195 SQLITE_DEFAULT_MMAP_SIZE, /* szMmap */ 196 SQLITE_MAX_MMAP_SIZE, /* mxMmap */ 197 (void*)0, /* pScratch */ 198 0, /* szScratch */ 199 0, /* nScratch */ 200 (void*)0, /* pPage */ 201 0, /* szPage */ 202 SQLITE_DEFAULT_PCACHE_INITSZ, /* nPage */ 203 0, /* mxParserStack */ 204 0, /* sharedCacheEnabled */ 205 SQLITE_SORTER_PMASZ, /* szPma */ 206 /* All the rest should always be initialized to zero */ 207 0, /* isInit */ 208 0, /* inProgress */ 209 0, /* isMutexInit */ 210 0, /* isMallocInit */ 211 0, /* isPCacheInit */ 212 0, /* nRefInitMutex */ 213 0, /* pInitMutex */ 214 0, /* xLog */ 215 0, /* pLogArg */ 216 #ifdef SQLITE_ENABLE_SQLLOG 217 0, /* xSqllog */ 218 0, /* pSqllogArg */ 219 #endif 220 #ifdef SQLITE_VDBE_COVERAGE 221 0, /* xVdbeBranch */ 222 0, /* pVbeBranchArg */ 223 #endif 224 #ifndef SQLITE_OMIT_BUILTIN_TEST 225 0, /* xTestCallback */ 226 #endif 227 0 /* bLocaltimeFault */ 228 }; 229 230 /* 231 ** Hash table for global functions - functions common to all 232 ** database connections. After initialization, this table is 233 ** read-only. 234 */ 235 FuncDefHash sqlite3BuiltinFunctions; 236 237 /* 238 ** Constant tokens for values 0 and 1. 239 */ 240 const Token sqlite3IntTokens[] = { 241 { "0", 1 }, 242 { "1", 1 } 243 }; 244 245 246 /* 247 ** The value of the "pending" byte must be 0x40000000 (1 byte past the 248 ** 1-gibabyte boundary) in a compatible database. SQLite never uses 249 ** the database page that contains the pending byte. It never attempts 250 ** to read or write that page. The pending byte page is set assign 251 ** for use by the VFS layers as space for managing file locks. 252 ** 253 ** During testing, it is often desirable to move the pending byte to 254 ** a different position in the file. This allows code that has to 255 ** deal with the pending byte to run on files that are much smaller 256 ** than 1 GiB. The sqlite3_test_control() interface can be used to 257 ** move the pending byte. 258 ** 259 ** IMPORTANT: Changing the pending byte to any value other than 260 ** 0x40000000 results in an incompatible database file format! 261 ** Changing the pending byte during operation will result in undefined 262 ** and incorrect behavior. 263 */ 264 #ifndef SQLITE_OMIT_WSD 265 int sqlite3PendingByte = 0x40000000; 266 #endif 267 268 #include "opcodes.h" 269 /* 270 ** Properties of opcodes. The OPFLG_INITIALIZER macro is 271 ** created by mkopcodeh.awk during compilation. Data is obtained 272 ** from the comments following the "case OP_xxxx:" statements in 273 ** the vdbe.c file. 274 */ 275 const unsigned char sqlite3OpcodeProperty[] = OPFLG_INITIALIZER; 276 277 /* 278 ** Name of the default collating sequence 279 */ 280 const char sqlite3StrBINARY[] = "BINARY"; 281