Annotation of embedaddon/sqlite3/src/global.c, revision 1.1.1.1
1.1 misho 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;
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