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Clean up comments and variable names prior to merge.

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FossilOrigin-Name: 6445519e91c4f98b4a9a45d5091d733c31497ebf0eb23a76edce3091f626035d
This commit is contained in:
drh
2018-02-27 14:49:25 +00:00
parent e39ef31cd6
commit 96acafbea7
7 changed files with 42 additions and 39 deletions
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11
src/vdbe.c
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@@ -2197,7 +2197,7 @@ case OP_Or: { /* same as TK_OR, in1, in2, out3 */
** This opcode implements the IS TRUE, IS FALSE, IS NOT TRUE, and
** IS NOT FALSE operators.
**
** Interpret the value in register P1 as a boolean value. Store the that
** Interpret the value in register P1 as a boolean value. Store that
** boolean (a 0 or 1) in register P2. Or if the value in register P1 is
** NULL, then the P3 is stored in register P2. Invert the answer if P4
** is 1.
@@ -2205,15 +2205,16 @@ case OP_Or: { /* same as TK_OR, in1, in2, out3 */
** The logic is summarized like this:
**
** <ul>
** <li> P3==0, P4==0 &rarr; r[P2] = r[P1] IS TRUE
** <li> P3==1, P4==1 &rarr; r[P2] = r[P1] IS FALSE
** <li> P3==0, P4==1 &rarr; r[P2] = r[P1] IS NOT TRUE
** <li> P3==1, P4==0 &rarr; r[P2] = r[P1] IS NOT FALSE
** <li> If P3==0 and P4==0 then r[P2] := r[P1] IS TRUE
** <li> If P3==1 and P4==1 then r[P2] := r[P1] IS FALSE
** <li> If P3==0 and P4==1 then r[P2] := r[P1] IS NOT TRUE
** <li> If P3==1 and P4==0 then r[P2] := r[P1] IS NOT FALSE
** </ul>
*/
case OP_IsTrue: { /* in1, out2 */
assert( pOp->p4type==P4_INT32 );
assert( pOp->p4.i==0 || pOp->p4.i==1 );
assert( pOp->p3==0 || pOp->p3==1 );
sqlite3VdbeMemSetInt64(&aMem[pOp->p2],
sqlite3VdbeBooleanValue(&aMem[pOp->p1], pOp->p3) ^ pOp->p4.i);
break;