Many hyperlinks are disabled.
Use anonymous login
to enable hyperlinks.
Overview
| Comment: | speed tweaks and documentation updates (CVS 170) |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: | b46f9a317b06bd490bda987e11e24f2c27162370 |
| User & Date: | drh 2000-12-10 18:35:20 |
Context
|
2000-12-10
| ||
| 18:40 | Version 1.0.17 (CVS 486) check-in: bee0c818 user: drh tags: trunk | |
| 18:35 | speed tweaks and documentation updates (CVS 170) check-in: b46f9a31 user: drh tags: trunk | |
| 18:23 | speed tweaks and documentation updates (CVS 169) check-in: 00c3dfd0 user: drh tags: trunk | |
Changes
Changes to src/vdbe.c.
37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 .... 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 .... 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 .... 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 .... 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 .... 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 .... 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 .... 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 .... 2344 2345 2346 2347 2348 2349 2350 2351 2352 2353 2354 2355 2356 2357 2358 |
** inplicit conversion from one type to the other occurs as necessary. ** ** Most of the code in this file is taken up by the sqliteVdbeExec() ** function which does the work of interpreting a VDBE program. ** But other routines are also provided to help in building up ** a program instruction by instruction. ** ** $Id: vdbe.c,v 1.48 2000/12/10 18:23:51 drh Exp $ */ #include "sqliteInt.h" #include <unistd.h> #include <ctype.h> /* ** SQL is translated into a sequence of instructions to be ................................................................................ case OP_Multiply: b *= a; break; default: { if( a==0 ) goto divide_by_zero; b /= a; break; } } PopStack(p, 2); p->tos = nos; aStack[nos].i = b; aStack[nos].flags = STK_Int; }else{ double a, b; Realify(p, tos); Realify(p, nos); a = aStack[tos].r; ................................................................................ case OP_Eq: c = c==0; break; case OP_Ne: c = c!=0; break; case OP_Lt: c = c<0; break; case OP_Le: c = c<=0; break; case OP_Gt: c = c>0; break; default: c = c>=0; break; } PopStack(p, 2); if( c ) pc = pOp->p2-1; break; } /* Opcode: Like P1 P2 * ** ** Pop the top two elements from the stack. The top-most is a ................................................................................ int tos = p->tos; int nos = tos - 1; int c; VERIFY( if( nos<0 ) goto not_enough_stack; ) Stringify(p, tos); Stringify(p, nos); c = sqliteLikeCompare(zStack[tos], zStack[nos]); PopStack(p, 2); if( pOp->p1 ) c = !c; if( c ) pc = pOp->p2-1; break; } /* Opcode: Glob P1 P2 * ** ................................................................................ int tos = p->tos; int nos = tos - 1; int c; VERIFY( if( nos<0 ) goto not_enough_stack; ) Stringify(p, tos); Stringify(p, nos); c = sqliteGlobCompare(zStack[tos], zStack[nos]); PopStack(p, 2); if( pOp->p1 ) c = !c; if( c ) pc = pOp->p2-1; break; } /* Opcode: And * * * ** ................................................................................ Integerify(p, tos); Integerify(p, nos); if( pOp->opcode==OP_And ){ c = aStack[tos].i && aStack[nos].i; }else{ c = aStack[tos].i || aStack[nos].i; } PopStack(p, 2); p->tos++; aStack[nos].i = c; aStack[nos].flags = STK_Int; break; } /* Opcode: Negative * * * ** ................................................................................ }else{ nKey = sizeof(int); zKey = (char*)&aStack[nos].i; } pBe->Put(p->aCsr[i].pCursor, nKey, zKey, aStack[tos].n, zStack[tos]); } PopStack(p, 2); break; } /* Opcode: Delete P1 * * ** ** The top of the stack is a key. Remove this key and its data ** from database file P1. Then pop the stack to discard the key. ................................................................................ pBe->Put(pCrsr, aStack[tos].n, zStack[tos], sizeof(int)*nIdx, (char*)aIdx); sqliteFree(aIdx); } } } } PopStack(p, 2); break; } /* Opcode: DeleteIdx P1 * * ** ** The top of the stack is a key and next on stack is integer ** which is the key to a record in an SQL table. ................................................................................ if( aIdx[0]*3 + 1 < nIdx ){ nIdx /= 2; } pBe->Put(pCrsr, aStack[tos].n, zStack[tos], sizeof(int)*nIdx, (char*)aIdx); } } PopStack(p, 2); break; } /* Opcode: Destroy * * P3 ** ** Drop the disk file whose name is P3. All key/data pairs in ** the file are deleted and the file itself is removed |
| | | | > | > | > | | | > | > | > |
37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 .... 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 .... 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 .... 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 .... 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 .... 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 .... 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 .... 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 2307 2308 2309 2310 2311 .... 2349 2350 2351 2352 2353 2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 |
** inplicit conversion from one type to the other occurs as necessary. ** ** Most of the code in this file is taken up by the sqliteVdbeExec() ** function which does the work of interpreting a VDBE program. ** But other routines are also provided to help in building up ** a program instruction by instruction. ** ** $Id: vdbe.c,v 1.49 2000/12/10 18:35:20 drh Exp $ */ #include "sqliteInt.h" #include <unistd.h> #include <ctype.h> /* ** SQL is translated into a sequence of instructions to be ................................................................................ case OP_Multiply: b *= a; break; default: { if( a==0 ) goto divide_by_zero; b /= a; break; } } POPSTACK; Release(p, nos); aStack[nos].i = b; aStack[nos].flags = STK_Int; }else{ double a, b; Realify(p, tos); Realify(p, nos); a = aStack[tos].r; ................................................................................ case OP_Eq: c = c==0; break; case OP_Ne: c = c!=0; break; case OP_Lt: c = c<0; break; case OP_Le: c = c<=0; break; case OP_Gt: c = c>0; break; default: c = c>=0; break; } POPSTACK; POPSTACK; if( c ) pc = pOp->p2-1; break; } /* Opcode: Like P1 P2 * ** ** Pop the top two elements from the stack. The top-most is a ................................................................................ int tos = p->tos; int nos = tos - 1; int c; VERIFY( if( nos<0 ) goto not_enough_stack; ) Stringify(p, tos); Stringify(p, nos); c = sqliteLikeCompare(zStack[tos], zStack[nos]); POPSTACK; POPSTACK; if( pOp->p1 ) c = !c; if( c ) pc = pOp->p2-1; break; } /* Opcode: Glob P1 P2 * ** ................................................................................ int tos = p->tos; int nos = tos - 1; int c; VERIFY( if( nos<0 ) goto not_enough_stack; ) Stringify(p, tos); Stringify(p, nos); c = sqliteGlobCompare(zStack[tos], zStack[nos]); POPSTACK; POPSTACK; if( pOp->p1 ) c = !c; if( c ) pc = pOp->p2-1; break; } /* Opcode: And * * * ** ................................................................................ Integerify(p, tos); Integerify(p, nos); if( pOp->opcode==OP_And ){ c = aStack[tos].i && aStack[nos].i; }else{ c = aStack[tos].i || aStack[nos].i; } POPSTACK; Release(p, nos); aStack[nos].i = c; aStack[nos].flags = STK_Int; break; } /* Opcode: Negative * * * ** ................................................................................ }else{ nKey = sizeof(int); zKey = (char*)&aStack[nos].i; } pBe->Put(p->aCsr[i].pCursor, nKey, zKey, aStack[tos].n, zStack[tos]); } POPSTACK; POPSTACK; break; } /* Opcode: Delete P1 * * ** ** The top of the stack is a key. Remove this key and its data ** from database file P1. Then pop the stack to discard the key. ................................................................................ pBe->Put(pCrsr, aStack[tos].n, zStack[tos], sizeof(int)*nIdx, (char*)aIdx); sqliteFree(aIdx); } } } } POPSTACK; POPSTACK; break; } /* Opcode: DeleteIdx P1 * * ** ** The top of the stack is a key and next on stack is integer ** which is the key to a record in an SQL table. ................................................................................ if( aIdx[0]*3 + 1 < nIdx ){ nIdx /= 2; } pBe->Put(pCrsr, aStack[tos].n, zStack[tos], sizeof(int)*nIdx, (char*)aIdx); } } POPSTACK; POPSTACK; break; } /* Opcode: Destroy * * P3 ** ** Drop the disk file whose name is P3. All key/data pairs in ** the file are deleted and the file itself is removed |