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Overview
| Comment: | Remove some cruft from the VDBE. Bring comments up to date. (CVS 2888) |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
41aef6496a10c81e1095408dc8f69740 |
| User & Date: | drh 2006-01-08 05:26:41 |
Context
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2006-01-08
| ||
| 18:10 | Get LIMIT and OFFSET working again for negative limits and offsets. Ticket #1586. (CVS 2889) (check-in: b2ac0be0 user: drh tags: trunk) | |
| 05:26 | Remove some cruft from the VDBE. Bring comments up to date. (CVS 2888) (check-in: 41aef649 user: drh tags: trunk) | |
| 05:02 | Reduce memory requirements for ORDER BY combined with LIMIT. Ticket #1586. (CVS 2887) (check-in: 55e703ec user: drh tags: trunk) | |
Changes
Changes to src/vdbe.c.
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** ** Various scripts scan this source file in order to generate HTML ** documentation, headers files, or other derived files. The formatting ** of the code in this file is, therefore, important. See other comments ** in this file for details. If in doubt, do not deviate from existing ** commenting and indentation practices when changing or adding code. ** ** $Id: vdbe.c,v 1.516 2006/01/07 18:48:26 drh Exp $ */ #include "sqliteInt.h" #include "os.h" #include <ctype.h> #include "vdbeInt.h" /* ................................................................................ if( pMem->i<pTos->i){ pMem->i = pTos->i; } break; } #endif /* SQLITE_OMIT_AUTOINCREMENT */ /* Opcode: MemIncr P1 P2 * ** ** Increment the integer valued memory cell P1 by 1. If P2 is not zero ** and the result after the increment is exactly 0, then jump ** to P2. ** ** This instruction throws an error if the memory cell is not initially ** an integer. */ case OP_MemIncr: { /* no-push */ int i = pOp->p1; Mem *pMem; assert( i>=0 && i<p->nMem ); pMem = &p->aMem[i]; assert( pMem->flags==MEM_Int ); pMem->i++; if( pOp->p2>0 && pMem->i==0 ){ pc = pOp->p2 - 1; } break; } /* Opcode: IfMemPos P1 P2 * ** ** If the value of memory cell P1 is 1 or greater, jump to P2. If ** the memory cell holds an integer of 0 or less or if it holds something ** that is not an integer, then fall thru. */ case OP_IfMemPos: { /* no-push */ int i = pOp->p1; Mem *pMem; assert( i>=0 && i<p->nMem ); pMem = &p->aMem[i]; if( pMem->flags==MEM_Int && pMem->i>0 ){ pc = pOp->p2 - 1; } break; } /* Opcode: IfMemZero P1 P2 * ** ** If the value of memory cell P1 is exactly 0, jump to P2. */ case OP_IfMemZero: { /* no-push */ int i = pOp->p1; Mem *pMem; assert( i>=0 && i<p->nMem ); pMem = &p->aMem[i]; if( pMem->flags==MEM_Int && pMem->i==0 ){ pc = pOp->p2 - 1; } break; } /* Opcode: MemNull P1 * * ** |
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** ** Various scripts scan this source file in order to generate HTML ** documentation, headers files, or other derived files. The formatting ** of the code in this file is, therefore, important. See other comments ** in this file for details. If in doubt, do not deviate from existing ** commenting and indentation practices when changing or adding code. ** ** $Id: vdbe.c,v 1.517 2006/01/08 05:26:41 drh Exp $ */ #include "sqliteInt.h" #include "os.h" #include <ctype.h> #include "vdbeInt.h" /* ................................................................................ if( pMem->i<pTos->i){ pMem->i = pTos->i; } break; } #endif /* SQLITE_OMIT_AUTOINCREMENT */ /* Opcode: MemIncr P1 * * ** ** Increment the integer valued memory cell P1 by 1. ** ** It is illegal to use this instruction on a memory cell that does ** not contain an integer. An assertion fault will result if you try. */ case OP_MemIncr: { /* no-push */ int i = pOp->p1; Mem *pMem; assert( i>=0 && i<p->nMem ); pMem = &p->aMem[i]; assert( pMem->flags==MEM_Int ); pMem->i++; assert( pOp->p2==0 ); break; } /* Opcode: IfMemPos P1 P2 * ** ** If the value of memory cell P1 is 1 or greater, jump to P2. If ** the memory cell holds an integer of 0 or less. ** ** It is illegal to use this instruction on a memory cell that does ** not contain an integer. An assertion fault will result if you try. */ case OP_IfMemPos: { /* no-push */ int i = pOp->p1; Mem *pMem; assert( i>=0 && i<p->nMem ); pMem = &p->aMem[i]; assert( pMem->flags==MEM_Int ); if( pMem->i>0 ){ pc = pOp->p2 - 1; } break; } /* Opcode: IfMemZero P1 P2 * ** ** If the value of memory cell P1 is exactly 0, jump to P2. ** ** It is illegal to use this instruction on a memory cell that does ** not contain an integer. An assertion fault will result if you try. */ case OP_IfMemZero: { /* no-push */ int i = pOp->p1; Mem *pMem; assert( i>=0 && i<p->nMem ); pMem = &p->aMem[i]; assert( pMem->flags==MEM_Int ); if( pMem->i==0 ){ pc = pOp->p2 - 1; } break; } /* Opcode: MemNull P1 * * ** |