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Add const to parameters on various internal interfaces.

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FossilOrigin-Name: 70c221c5cf7b4d9ed34f16d045f262f99d16aa3db84f80cf0b03ee82ba28d075
This commit is contained in:
drh
2021-09-25 17:07:57 +00:00
parent 84d90319e5
commit 1580d50b76
6 changed files with 47 additions and 28 deletions
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30
src/expr.c
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@@ -5329,7 +5329,11 @@ void sqlite3ExprIfFalseDup(Parse *pParse, Expr *pExpr, int dest,int jumpIfNull){
** Otherwise, if the values are not the same or if pExpr is not a simple
** SQL value, zero is returned.
*/
static int exprCompareVariable(Parse *pParse, Expr *pVar, Expr *pExpr){
static int exprCompareVariable(
const Parse *pParse,
const Expr *pVar,
const Expr *pExpr
){
int res = 0;
int iVar;
sqlite3_value *pL, *pR = 0;
@@ -5381,7 +5385,12 @@ static int exprCompareVariable(Parse *pParse, Expr *pVar, Expr *pExpr){
** Argument pParse should normally be NULL. If it is not NULL and pA or
** pB causes a return value of 2.
*/
int sqlite3ExprCompare(Parse *pParse, Expr *pA, Expr *pB, int iTab){
int sqlite3ExprCompare(
const Parse *pParse,
const Expr *pA,
const Expr *pB,
int iTab
){
u32 combinedFlags;
if( pA==0 || pB==0 ){
return pB==pA ? 0 : 2;
@@ -5465,7 +5474,7 @@ int sqlite3ExprCompare(Parse *pParse, Expr *pA, Expr *pB, int iTab){
** Two NULL pointers are considered to be the same. But a NULL pointer
** always differs from a non-NULL pointer.
*/
int sqlite3ExprListCompare(ExprList *pA, ExprList *pB, int iTab){
int sqlite3ExprListCompare(const ExprList *pA, const ExprList *pB, int iTab){
int i;
if( pA==0 && pB==0 ) return 0;
if( pA==0 || pB==0 ) return 1;
@@ -5484,7 +5493,7 @@ int sqlite3ExprListCompare(ExprList *pA, ExprList *pB, int iTab){
** Like sqlite3ExprCompare() except COLLATE operators at the top-level
** are ignored.
*/
int sqlite3ExprCompareSkip(Expr *pA, Expr *pB, int iTab){
int sqlite3ExprCompareSkip(Expr *pA,Expr *pB, int iTab){
return sqlite3ExprCompare(0,
sqlite3ExprSkipCollateAndLikely(pA),
sqlite3ExprSkipCollateAndLikely(pB),
@@ -5498,9 +5507,9 @@ int sqlite3ExprCompareSkip(Expr *pA, Expr *pB, int iTab){
** non-NULL if pNN is not NULL
*/
static int exprImpliesNotNull(
Parse *pParse, /* Parsing context */
Expr *p, /* The expression to be checked */
Expr *pNN, /* The expression that is NOT NULL */
const Parse *pParse,/* Parsing context */
const Expr *p, /* The expression to be checked */
const Expr *pNN, /* The expression that is NOT NULL */
int iTab, /* Table being evaluated */
int seenNot /* Return true only if p can be any non-NULL value */
){
@@ -5593,7 +5602,12 @@ static int exprImpliesNotNull(
** improvement. Returning false might cause a performance reduction, but
** it will always give the correct answer and is hence always safe.
*/
int sqlite3ExprImpliesExpr(Parse *pParse, Expr *pE1, Expr *pE2, int iTab){
int sqlite3ExprImpliesExpr(
const Parse *pParse,
const Expr *pE1,
const Expr *pE2,
int iTab
){
if( sqlite3ExprCompare(pParse, pE1, pE2, iTab)==0 ){
return 1;
}