embedaddon/sqlite3/src/global.c - view

File: [ELWIX - Embedded LightWeight unIX -] / embedaddon / sqlite3 / src / global.c
Revision 1.1.1.1 (vendor branch): download - view: text, annotated - select for diffs - revision graph
Tue Feb 21 17:04:17 2012 UTC (12 years, 8 months ago) by misho
Branches: sqlite3, MAIN
CVS tags: v3_7_10, HEAD

sqlite3

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 contants. 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, 66, 67, 68, 69, 70, 71, 72, 73,106,107,108,109,110,111, /* 6x */ 50: 112, 81, 82, 83, 84, 85, 86, 87, 88, 89,122,123,124,125,126,127, /* 7x */ 51: 128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143, /* 8x */ 52: 144,145,146,147,148,149,150,151,152,153,154,155,156,157,156,159, /* 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: 224,225,162,163,164,165,166,167,168,169,232,203,204,205,206,207, /* Ex */ 58: 239,240,241,242,243,244,245,246,247,248,249,219,220,221,222,255, /* 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: #ifndef SQLITE_USE_URI 133: # define SQLITE_USE_URI 0 134: #endif 135: 136: /* 137: ** The following singleton contains the global configuration for 138: ** the SQLite library. 139: */ 140: SQLITE_WSD struct Sqlite3Config sqlite3Config = { 141: SQLITE_DEFAULT_MEMSTATUS, /* bMemstat */ 142: 1, /* bCoreMutex */ 143: SQLITE_THREADSAFE==1, /* bFullMutex */ 144: SQLITE_USE_URI, /* bOpenUri */ 145: 0x7ffffffe, /* mxStrlen */ 146: 128, /* szLookaside */ 147: 500, /* nLookaside */ 148: {0,0,0,0,0,0,0,0}, /* m */ 149: {0,0,0,0,0,0,0,0,0}, /* mutex */ 150: {0,0,0,0,0,0,0,0,0,0,0,0,0},/* pcache2 */ 151: (void*)0, /* pHeap */ 152: 0, /* nHeap */ 153: 0, 0, /* mnHeap, mxHeap */ 154: (void*)0, /* pScratch */ 155: 0, /* szScratch */ 156: 0, /* nScratch */ 157: (void*)0, /* pPage */ 158: 0, /* szPage */ 159: 0, /* nPage */ 160: 0, /* mxParserStack */ 161: 0, /* sharedCacheEnabled */ 162: /* All the rest should always be initialized to zero */ 163: 0, /* isInit */ 164: 0, /* inProgress */ 165: 0, /* isMutexInit */ 166: 0, /* isMallocInit */ 167: 0, /* isPCacheInit */ 168: 0, /* pInitMutex */ 169: 0, /* nRefInitMutex */ 170: 0, /* xLog */ 171: 0, /* pLogArg */ 172: 0, /* bLocaltimeFault */ 173: }; 174: 175: 176: /* 177: ** Hash table for global functions - functions common to all 178: ** database connections. After initialization, this table is 179: ** read-only. 180: */ 181: SQLITE_WSD FuncDefHash sqlite3GlobalFunctions; 182: 183: /* 184: ** Constant tokens for values 0 and 1. 185: */ 186: const Token sqlite3IntTokens[] = { 187: { "0", 1 }, 188: { "1", 1 } 189: }; 190: 191: 192: /* 193: ** The value of the "pending" byte must be 0x40000000 (1 byte past the 194: ** 1-gibabyte boundary) in a compatible database. SQLite never uses 195: ** the database page that contains the pending byte. It never attempts 196: ** to read or write that page. The pending byte page is set assign 197: ** for use by the VFS layers as space for managing file locks. 198: ** 199: ** During testing, it is often desirable to move the pending byte to 200: ** a different position in the file. This allows code that has to 201: ** deal with the pending byte to run on files that are much smaller 202: ** than 1 GiB. The sqlite3_test_control() interface can be used to 203: ** move the pending byte. 204: ** 205: ** IMPORTANT: Changing the pending byte to any value other than 206: ** 0x40000000 results in an incompatible database file format! 207: ** Changing the pending byte during operating results in undefined 208: ** and dileterious behavior. 209: */ 210: #ifndef SQLITE_OMIT_WSD 211: int sqlite3PendingByte = 0x40000000; 212: #endif 213: 214: #include "opcodes.h" 215: /* 216: ** Properties of opcodes. The OPFLG_INITIALIZER macro is 217: ** created by mkopcodeh.awk during compilation. Data is obtained 218: ** from the comments following the "case OP_xxxx:" statements in 219: ** the vdbe.c file. 220: */ 221: const unsigned char sqlite3OpcodeProperty[] = OPFLG_INITIALIZER;