000001 /*
000002 ** 2008 June 13
000003 **
000004 ** The author disclaims copyright to this source code. In place of
000005 ** a legal notice, here is a blessing:
000006 **
000007 ** May you do good and not evil.
000008 ** May you find forgiveness for yourself and forgive others.
000009 ** May you share freely, never taking more than you give.
000010 **
000011 *************************************************************************
000012 **
000013 ** This file contains definitions of global variables and constants.
000014 */
000015 #include "sqliteInt.h"
000016
000017 /* An array to map all upper-case characters into their corresponding
000018 ** lower-case character.
000019 **
000020 ** SQLite only considers US-ASCII (or EBCDIC) characters. We do not
000021 ** handle case conversions for the UTF character set since the tables
000022 ** involved are nearly as big or bigger than SQLite itself.
000023 */
000024 const unsigned char sqlite3UpperToLower[] = {
000025 #ifdef SQLITE_ASCII
000026 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17,
000027 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35,
000028 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53,
000029 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 97, 98, 99,100,101,102,103,
000030 104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,
000031 122, 91, 92, 93, 94, 95, 96, 97, 98, 99,100,101,102,103,104,105,106,107,
000032 108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,
000033 126,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,
000034 144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,160,161,
000035 162,163,164,165,166,167,168,169,170,171,172,173,174,175,176,177,178,179,
000036 180,181,182,183,184,185,186,187,188,189,190,191,192,193,194,195,196,197,
000037 198,199,200,201,202,203,204,205,206,207,208,209,210,211,212,213,214,215,
000038 216,217,218,219,220,221,222,223,224,225,226,227,228,229,230,231,232,233,
000039 234,235,236,237,238,239,240,241,242,243,244,245,246,247,248,249,250,251,
000040 252,253,254,255
000041 #endif
000042 #ifdef SQLITE_EBCDIC
000043 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, /* 0x */
000044 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, /* 1x */
000045 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, /* 2x */
000046 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, /* 3x */
000047 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, /* 4x */
000048 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, /* 5x */
000049 96, 97, 98, 99,100,101,102,103,104,105,106,107,108,109,110,111, /* 6x */
000050 112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127, /* 7x */
000051 128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143, /* 8x */
000052 144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159, /* 9x */
000053 160,161,162,163,164,165,166,167,168,169,170,171,140,141,142,175, /* Ax */
000054 176,177,178,179,180,181,182,183,184,185,186,187,188,189,190,191, /* Bx */
000055 192,129,130,131,132,133,134,135,136,137,202,203,204,205,206,207, /* Cx */
000056 208,145,146,147,148,149,150,151,152,153,218,219,220,221,222,223, /* Dx */
000057 224,225,162,163,164,165,166,167,168,169,234,235,236,237,238,239, /* Ex */
000058 240,241,242,243,244,245,246,247,248,249,250,251,252,253,254,255, /* Fx */
000059 #endif
000060 };
000061
000062 /*
000063 ** The following 256 byte lookup table is used to support SQLites built-in
000064 ** equivalents to the following standard library functions:
000065 **
000066 ** isspace() 0x01
000067 ** isalpha() 0x02
000068 ** isdigit() 0x04
000069 ** isalnum() 0x06
000070 ** isxdigit() 0x08
000071 ** toupper() 0x20
000072 ** SQLite identifier character 0x40
000073 ** Quote character 0x80
000074 **
000075 ** Bit 0x20 is set if the mapped character requires translation to upper
000076 ** case. i.e. if the character is a lower-case ASCII character.
000077 ** If x is a lower-case ASCII character, then its upper-case equivalent
000078 ** is (x - 0x20). Therefore toupper() can be implemented as:
000079 **
000080 ** (x & ~(map[x]&0x20))
000081 **
000082 ** The equivalent of tolower() is implemented using the sqlite3UpperToLower[]
000083 ** array. tolower() is used more often than toupper() by SQLite.
000084 **
000085 ** Bit 0x40 is set if the character is non-alphanumeric and can be used in an
000086 ** SQLite identifier. Identifiers are alphanumerics, "_", "$", and any
000087 ** non-ASCII UTF character. Hence the test for whether or not a character is
000088 ** part of an identifier is 0x46.
000089 */
000090 #ifdef SQLITE_ASCII
000091 const unsigned char sqlite3CtypeMap[256] = {
000092 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 00..07 ........ */
000093 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x00, 0x00, /* 08..0f ........ */
000094 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 10..17 ........ */
000095 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 18..1f ........ */
000096 0x01, 0x00, 0x80, 0x00, 0x40, 0x00, 0x00, 0x80, /* 20..27 !"#$%&' */
000097 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 28..2f ()*+,-./ */
000098 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, /* 30..37 01234567 */
000099 0x0c, 0x0c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 38..3f 89:;<=>? */
000100
000101 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x02, /* 40..47 @ABCDEFG */
000102 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, /* 48..4f HIJKLMNO */
000103 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, /* 50..57 PQRSTUVW */
000104 0x02, 0x02, 0x02, 0x80, 0x00, 0x00, 0x00, 0x40, /* 58..5f XYZ[\]^_ */
000105 0x80, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x22, /* 60..67 `abcdefg */
000106 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, /* 68..6f hijklmno */
000107 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, /* 70..77 pqrstuvw */
000108 0x22, 0x22, 0x22, 0x00, 0x00, 0x00, 0x00, 0x00, /* 78..7f xyz{|}~. */
000109
000110 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, /* 80..87 ........ */
000111 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, /* 88..8f ........ */
000112 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, /* 90..97 ........ */
000113 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, /* 98..9f ........ */
000114 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, /* a0..a7 ........ */
000115 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, /* a8..af ........ */
000116 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, /* b0..b7 ........ */
000117 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, /* b8..bf ........ */
000118
000119 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, /* c0..c7 ........ */
000120 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, /* c8..cf ........ */
000121 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, /* d0..d7 ........ */
000122 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, /* d8..df ........ */
000123 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, /* e0..e7 ........ */
000124 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, /* e8..ef ........ */
000125 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, /* f0..f7 ........ */
000126 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40 /* f8..ff ........ */
000127 };
000128 #endif
000129
000130 /* EVIDENCE-OF: R-02982-34736 In order to maintain full backwards
000131 ** compatibility for legacy applications, the URI filename capability is
000132 ** disabled by default.
000133 **
000134 ** EVIDENCE-OF: R-38799-08373 URI filenames can be enabled or disabled
000135 ** using the SQLITE_USE_URI=1 or SQLITE_USE_URI=0 compile-time options.
000136 **
000137 ** EVIDENCE-OF: R-43642-56306 By default, URI handling is globally
000138 ** disabled. The default value may be changed by compiling with the
000139 ** SQLITE_USE_URI symbol defined.
000140 **
000141 ** URI filenames are enabled by default if SQLITE_HAS_CODEC is
000142 ** enabled.
000143 */
000144 #ifndef SQLITE_USE_URI
000145 # ifdef SQLITE_HAS_CODEC
000146 # define SQLITE_USE_URI 1
000147 # else
000148 # define SQLITE_USE_URI 0
000149 # endif
000150 #endif
000151
000152 /* EVIDENCE-OF: R-38720-18127 The default setting is determined by the
000153 ** SQLITE_ALLOW_COVERING_INDEX_SCAN compile-time option, or is "on" if
000154 ** that compile-time option is omitted.
000155 */
000156 #if !defined(SQLITE_ALLOW_COVERING_INDEX_SCAN)
000157 # define SQLITE_ALLOW_COVERING_INDEX_SCAN 1
000158 #else
000159 # if !SQLITE_ALLOW_COVERING_INDEX_SCAN
000160 # error "Compile-time disabling of covering index scan using the\
000161 -DSQLITE_ALLOW_COVERING_INDEX_SCAN=0 option is deprecated.\
000162 Contact SQLite developers if this is a problem for you, and\
000163 delete this #error macro to continue with your build."
000164 # endif
000165 #endif
000166
000167 /* The minimum PMA size is set to this value multiplied by the database
000168 ** page size in bytes.
000169 */
000170 #ifndef SQLITE_SORTER_PMASZ
000171 # define SQLITE_SORTER_PMASZ 250
000172 #endif
000173
000174 /* Statement journals spill to disk when their size exceeds the following
000175 ** threshold (in bytes). 0 means that statement journals are created and
000176 ** written to disk immediately (the default behavior for SQLite versions
000177 ** before 3.12.0). -1 means always keep the entire statement journal in
000178 ** memory. (The statement journal is also always held entirely in memory
000179 ** if journal_mode=MEMORY or if temp_store=MEMORY, regardless of this
000180 ** setting.)
000181 */
000182 #ifndef SQLITE_STMTJRNL_SPILL
000183 # define SQLITE_STMTJRNL_SPILL (64*1024)
000184 #endif
000185
000186 /*
000187 ** The default lookaside-configuration, the format "SZ,N". SZ is the
000188 ** number of bytes in each lookaside slot (should be a multiple of 8)
000189 ** and N is the number of slots. The lookaside-configuration can be
000190 ** changed as start-time using sqlite3_config(SQLITE_CONFIG_LOOKASIDE)
000191 ** or at run-time for an individual database connection using
000192 ** sqlite3_db_config(db, SQLITE_DBCONFIG_LOOKASIDE);
000193 */
000194 #ifndef SQLITE_DEFAULT_LOOKASIDE
000195 # define SQLITE_DEFAULT_LOOKASIDE 1200,100
000196 #endif
000197
000198
000199 /* The default maximum size of an in-memory database created using
000200 ** sqlite3_deserialize()
000201 */
000202 #ifndef SQLITE_MEMDB_DEFAULT_MAXSIZE
000203 # define SQLITE_MEMDB_DEFAULT_MAXSIZE 1073741824
000204 #endif
000205
000206 /*
000207 ** The following singleton contains the global configuration for
000208 ** the SQLite library.
000209 */
000210 SQLITE_WSD struct Sqlite3Config sqlite3Config = {
000211 SQLITE_DEFAULT_MEMSTATUS, /* bMemstat */
000212 1, /* bCoreMutex */
000213 SQLITE_THREADSAFE==1, /* bFullMutex */
000214 SQLITE_USE_URI, /* bOpenUri */
000215 SQLITE_ALLOW_COVERING_INDEX_SCAN, /* bUseCis */
000216 0, /* bSmallMalloc */
000217 1, /* bExtraSchemaChecks */
000218 0x7ffffffe, /* mxStrlen */
000219 0, /* neverCorrupt */
000220 SQLITE_DEFAULT_LOOKASIDE, /* szLookaside, nLookaside */
000221 SQLITE_STMTJRNL_SPILL, /* nStmtSpill */
000222 {0,0,0,0,0,0,0,0}, /* m */
000223 {0,0,0,0,0,0,0,0,0}, /* mutex */
000224 {0,0,0,0,0,0,0,0,0,0,0,0,0},/* pcache2 */
000225 (void*)0, /* pHeap */
000226 0, /* nHeap */
000227 0, 0, /* mnHeap, mxHeap */
000228 SQLITE_DEFAULT_MMAP_SIZE, /* szMmap */
000229 SQLITE_MAX_MMAP_SIZE, /* mxMmap */
000230 (void*)0, /* pPage */
000231 0, /* szPage */
000232 SQLITE_DEFAULT_PCACHE_INITSZ, /* nPage */
000233 0, /* mxParserStack */
000234 0, /* sharedCacheEnabled */
000235 SQLITE_SORTER_PMASZ, /* szPma */
000236 /* All the rest should always be initialized to zero */
000237 0, /* isInit */
000238 0, /* inProgress */
000239 0, /* isMutexInit */
000240 0, /* isMallocInit */
000241 0, /* isPCacheInit */
000242 0, /* nRefInitMutex */
000243 0, /* pInitMutex */
000244 0, /* xLog */
000245 0, /* pLogArg */
000246 #ifdef SQLITE_ENABLE_SQLLOG
000247 0, /* xSqllog */
000248 0, /* pSqllogArg */
000249 #endif
000250 #ifdef SQLITE_VDBE_COVERAGE
000251 0, /* xVdbeBranch */
000252 0, /* pVbeBranchArg */
000253 #endif
000254 #ifdef SQLITE_ENABLE_DESERIALIZE
000255 SQLITE_MEMDB_DEFAULT_MAXSIZE, /* mxMemdbSize */
000256 #endif
000257 #ifndef SQLITE_UNTESTABLE
000258 0, /* xTestCallback */
000259 #endif
000260 0, /* bLocaltimeFault */
000261 0, /* bInternalFunctions */
000262 0x7ffffffe, /* iOnceResetThreshold */
000263 SQLITE_DEFAULT_SORTERREF_SIZE, /* szSorterRef */
000264 0, /* iPrngSeed */
000265 };
000266
000267 /*
000268 ** Hash table for global functions - functions common to all
000269 ** database connections. After initialization, this table is
000270 ** read-only.
000271 */
000272 FuncDefHash sqlite3BuiltinFunctions;
000273
000274 #ifdef VDBE_PROFILE
000275 /*
000276 ** The following performance counter can be used in place of
000277 ** sqlite3Hwtime() for profiling. This is a no-op on standard builds.
000278 */
000279 sqlite3_uint64 sqlite3NProfileCnt = 0;
000280 #endif
000281
000282 /*
000283 ** The value of the "pending" byte must be 0x40000000 (1 byte past the
000284 ** 1-gibabyte boundary) in a compatible database. SQLite never uses
000285 ** the database page that contains the pending byte. It never attempts
000286 ** to read or write that page. The pending byte page is set aside
000287 ** for use by the VFS layers as space for managing file locks.
000288 **
000289 ** During testing, it is often desirable to move the pending byte to
000290 ** a different position in the file. This allows code that has to
000291 ** deal with the pending byte to run on files that are much smaller
000292 ** than 1 GiB. The sqlite3_test_control() interface can be used to
000293 ** move the pending byte.
000294 **
000295 ** IMPORTANT: Changing the pending byte to any value other than
000296 ** 0x40000000 results in an incompatible database file format!
000297 ** Changing the pending byte during operation will result in undefined
000298 ** and incorrect behavior.
000299 */
000300 #ifndef SQLITE_OMIT_WSD
000301 int sqlite3PendingByte = 0x40000000;
000302 #endif
000303
000304 #include "opcodes.h"
000305 /*
000306 ** Properties of opcodes. The OPFLG_INITIALIZER macro is
000307 ** created by mkopcodeh.awk during compilation. Data is obtained
000308 ** from the comments following the "case OP_xxxx:" statements in
000309 ** the vdbe.c file.
000310 */
000311 const unsigned char sqlite3OpcodeProperty[] = OPFLG_INITIALIZER;
000312
000313 /*
000314 ** Name of the default collating sequence
000315 */
000316 const char sqlite3StrBINARY[] = "BINARY";