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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: |
b46f9a317b06bd490bda987e11e24f2c |
| 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.
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** 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 |
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** 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 |