| private BinaryCompare ( object vLeft, object vRight, StorageType resultType, int op ) : int | ||
| vLeft | object | |
| vRight | object | |
| resultType | StorageType | |
| op | int | |
| return | int | |
private int Eval(BinaryNode expr, DataRow row, DataRowVersion version) {
if (expr.op == Operators.And) {
int lResult = Eval((BinaryNode)expr.left,row,version);
if (lResult != 0)
return lResult;
int rResult = Eval((BinaryNode)expr.right,row,version);
if (rResult != 0)
return rResult;
return 0;
}
long c = 0;
object vLeft = expr.left.Eval(row, version);
if (expr.op != Operators.Is && expr.op != Operators.IsNot) {
object vRight = expr.right.Eval(row, version);
bool isLConst = (expr.left is ConstNode);
bool isRConst = (expr.right is ConstNode);
if ((vLeft == DBNull.Value)||(expr.left.IsSqlColumn && DataStorage.IsObjectSqlNull(vLeft)))
return -1;
if ((vRight == DBNull.Value)||(expr.right.IsSqlColumn && DataStorage.IsObjectSqlNull(vRight)))
return 1;
StorageType leftType = DataStorage.GetStorageType(vLeft.GetType());
if (StorageType.Char == leftType) {
if ((isRConst)||(!expr.right.IsSqlColumn))
vRight = Convert.ToChar(vRight, table.FormatProvider);
else
vRight = SqlConvert.ChangeType2(vRight, StorageType.Char, typeof(char), table.FormatProvider);
}
StorageType rightType = DataStorage.GetStorageType(vRight.GetType());
StorageType resultType;
if (expr.left.IsSqlColumn || expr.right.IsSqlColumn) {
resultType = expr.ResultSqlType(leftType, rightType, isLConst, isRConst, expr.op);
}
else {
resultType = expr.ResultType(leftType, rightType, isLConst, isRConst, expr.op);
}
if (StorageType.Empty == resultType) {
expr.SetTypeMismatchError(expr.op, vLeft.GetType(), vRight.GetType());
}
// if comparing a Guid column value against a string literal
// use InvariantCulture instead of DataTable.Locale because in the Danish related cultures
// sorting a Guid as a string has different results than in Invariant and English related cultures.
// This fix is restricted to DataTable.Select("GuidColumn = 'string literal'") types of queries
NameNode namedNode = null;
System.Globalization.CompareInfo comparer =
((isLConst && !isRConst && (leftType == StorageType.String) && (rightType == StorageType.Guid) && (null != (namedNode = expr.right as NameNode)) && (namedNode.column.DataType == typeof(Guid))) ||
(isRConst && !isLConst && (rightType == StorageType.String) && (leftType == StorageType.Guid) && (null != (namedNode = expr.left as NameNode)) && (namedNode.column.DataType == typeof(Guid))))
? System.Globalization.CultureInfo.InvariantCulture.CompareInfo : null;
c = expr.BinaryCompare(vLeft, vRight, resultType, expr.op, comparer);
}
switch(expr.op) {
case Operators.EqualTo: c = (c == 0 ? 0 : c < 0 ? -1 : 1); break;
case Operators.GreaterThen: c = (c > 0 ? 0 : -1); break;
case Operators.LessThen: c = (c < 0 ? 0 : 1); break;
case Operators.GreaterOrEqual: c = (c >= 0 ? 0 : -1); break;
case Operators.LessOrEqual: c = (c <= 0 ? 0 : 1); break;
case Operators.Is: c = (vLeft == DBNull.Value ? 0 : -1); break;
case Operators.IsNot: c = (vLeft != DBNull.Value ? 0 : 1); break;
default: Debug.Assert(true, "Unsupported Binary Search Operator!"); break;
}
return (int)c;
}
private int Eval(BinaryNode expr, DataRow row, DataRowVersion version)
{
if (expr.op == 0x1a)
{
int num4 = this.Eval((BinaryNode) expr.left, row, version);
if (num4 != 0)
{
return num4;
}
int num3 = this.Eval((BinaryNode) expr.right, row, version);
if (num3 != 0)
{
return num3;
}
return 0;
}
long num = 0L;
object obj3 = expr.left.Eval(row, version);
if ((expr.op != 13) && (expr.op != 0x27))
{
StorageType type;
object obj2 = expr.right.Eval(row, version);
bool lc = expr.left is ConstNode;
bool rc = expr.right is ConstNode;
if ((obj3 == DBNull.Value) || (expr.left.IsSqlColumn && DataStorage.IsObjectSqlNull(obj3)))
{
return -1;
}
if ((obj2 == DBNull.Value) || (expr.right.IsSqlColumn && DataStorage.IsObjectSqlNull(obj2)))
{
return 1;
}
StorageType storageType = DataStorage.GetStorageType(obj3.GetType());
if (StorageType.Char == storageType)
{
if (rc || !expr.right.IsSqlColumn)
{
obj2 = Convert.ToChar(obj2, this.table.FormatProvider);
}
else
{
obj2 = SqlConvert.ChangeType2(obj2, StorageType.Char, typeof(char), this.table.FormatProvider);
}
}
StorageType right = DataStorage.GetStorageType(obj2.GetType());
if (expr.left.IsSqlColumn || expr.right.IsSqlColumn)
{
type = expr.ResultSqlType(storageType, right, lc, rc, expr.op);
}
else
{
type = expr.ResultType(storageType, right, lc, rc, expr.op);
}
if (type == StorageType.Empty)
{
expr.SetTypeMismatchError(expr.op, obj3.GetType(), obj2.GetType());
}
num = expr.BinaryCompare(obj3, obj2, type, expr.op);
}
switch (expr.op)
{
case 7:
num = (num == 0L) ? ((long) 0) : ((num < 0L) ? ((long) (-1)) : ((long) 1));
break;
case 8:
num = (num > 0L) ? ((long) 0) : ((long) (-1));
break;
case 9:
num = (num < 0L) ? ((long) 0) : ((long) 1);
break;
case 10:
num = (num >= 0L) ? ((long) 0) : ((long) (-1));
break;
case 11:
num = (num <= 0L) ? ((long) 0) : ((long) 1);
break;
case 13:
num = (obj3 == DBNull.Value) ? ((long) 0) : ((long) (-1));
break;
case 0x27:
num = (obj3 != DBNull.Value) ? ((long) 0) : ((long) 1);
break;
}
return (int) num;
}
private int Eval(BinaryNode expr, DataRow row, DataRowVersion version)
{
if (expr._op == Operators.And)
{
int lResult = Eval((BinaryNode)expr._left, row, version);
if (lResult != 0)
{
return(lResult);
}
int rResult = Eval((BinaryNode)expr._right, row, version);
if (rResult != 0)
{
return(rResult);
}
return(0);
}
long c = 0;
object vLeft = expr._left.Eval(row, version);
if (expr._op != Operators.Is && expr._op != Operators.IsNot)
{
object vRight = expr._right.Eval(row, version);
bool isLConst = (expr._left is ConstNode);
bool isRConst = (expr._right is ConstNode);
if ((vLeft == DBNull.Value) || (expr._left.IsSqlColumn && DataStorage.IsObjectSqlNull(vLeft)))
{
return(-1);
}
if ((vRight == DBNull.Value) || (expr._right.IsSqlColumn && DataStorage.IsObjectSqlNull(vRight)))
{
return(1);
}
StorageType leftType = DataStorage.GetStorageType(vLeft.GetType());
if (StorageType.Char == leftType)
{
if ((isRConst) || (!expr._right.IsSqlColumn))
{
vRight = Convert.ToChar(vRight, _table.FormatProvider);
}
else
{
vRight = SqlConvert.ChangeType2(vRight, StorageType.Char, typeof(char), _table.FormatProvider);
}
}
StorageType rightType = DataStorage.GetStorageType(vRight.GetType());
StorageType resultType;
if (expr._left.IsSqlColumn || expr._right.IsSqlColumn)
{
resultType = expr.ResultSqlType(leftType, rightType, isLConst, isRConst, expr._op);
}
else
{
resultType = expr.ResultType(leftType, rightType, isLConst, isRConst, expr._op);
}
if (StorageType.Empty == resultType)
{
expr.SetTypeMismatchError(expr._op, vLeft.GetType(), vRight.GetType());
}
// if comparing a Guid column value against a string literal
// use InvariantCulture instead of DataTable.Locale because in the Danish related cultures
// sorting a Guid as a string has different results than in Invariant and English related cultures.
// This fix is restricted to DataTable.Select("GuidColumn = 'string literal'") types of queries
NameNode namedNode = null;
System.Globalization.CompareInfo comparer =
((isLConst && !isRConst && (leftType == StorageType.String) && (rightType == StorageType.Guid) && (null != (namedNode = expr._right as NameNode)) && (namedNode._column.DataType == typeof(Guid))) ||
(isRConst && !isLConst && (rightType == StorageType.String) && (leftType == StorageType.Guid) && (null != (namedNode = expr._left as NameNode)) && (namedNode._column.DataType == typeof(Guid))))
? System.Globalization.CultureInfo.InvariantCulture.CompareInfo : null;
c = expr.BinaryCompare(vLeft, vRight, resultType, expr._op, comparer);
}
switch (expr._op)
{
case Operators.EqualTo: c = (c == 0 ? 0 : c < 0 ? -1 : 1); break;
case Operators.GreaterThen: c = (c > 0 ? 0 : -1); break;
case Operators.LessThen: c = (c < 0 ? 0 : 1); break;
case Operators.GreaterOrEqual: c = (c >= 0 ? 0 : -1); break;
case Operators.LessOrEqual: c = (c <= 0 ? 0 : 1); break;
case Operators.Is: c = (vLeft == DBNull.Value ? 0 : -1); break;
case Operators.IsNot: c = (vLeft != DBNull.Value ? 0 : 1); break;
default: Debug.Assert(true, "Unsupported Binary Search Operator!"); break;
}
return((int)c);
}
private int Eval(BinaryNode expr, DataRow row, DataRowVersion version)
{
if (expr.op == 0x1a)
{
int num4 = this.Eval((BinaryNode)expr.left, row, version);
if (num4 != 0)
{
return(num4);
}
int num3 = this.Eval((BinaryNode)expr.right, row, version);
if (num3 != 0)
{
return(num3);
}
return(0);
}
long num = 0L;
object obj3 = expr.left.Eval(row, version);
if ((expr.op != 13) && (expr.op != 0x27))
{
StorageType type;
object obj2 = expr.right.Eval(row, version);
bool lc = expr.left is ConstNode;
bool rc = expr.right is ConstNode;
if ((obj3 == DBNull.Value) || (expr.left.IsSqlColumn && DataStorage.IsObjectSqlNull(obj3)))
{
return(-1);
}
if ((obj2 == DBNull.Value) || (expr.right.IsSqlColumn && DataStorage.IsObjectSqlNull(obj2)))
{
return(1);
}
StorageType storageType = DataStorage.GetStorageType(obj3.GetType());
if (StorageType.Char == storageType)
{
if (rc || !expr.right.IsSqlColumn)
{
obj2 = Convert.ToChar(obj2, this.table.FormatProvider);
}
else
{
obj2 = SqlConvert.ChangeType2(obj2, StorageType.Char, typeof(char), this.table.FormatProvider);
}
}
StorageType right = DataStorage.GetStorageType(obj2.GetType());
if (expr.left.IsSqlColumn || expr.right.IsSqlColumn)
{
type = expr.ResultSqlType(storageType, right, lc, rc, expr.op);
}
else
{
type = expr.ResultType(storageType, right, lc, rc, expr.op);
}
if (type == StorageType.Empty)
{
expr.SetTypeMismatchError(expr.op, obj3.GetType(), obj2.GetType());
}
num = expr.BinaryCompare(obj3, obj2, type, expr.op);
}
switch (expr.op)
{
case 7:
num = (num == 0L) ? ((long)0) : ((num < 0L) ? ((long)(-1)) : ((long)1));
break;
case 8:
num = (num > 0L) ? ((long)0) : ((long)(-1));
break;
case 9:
num = (num < 0L) ? ((long)0) : ((long)1);
break;
case 10:
num = (num >= 0L) ? ((long)0) : ((long)(-1));
break;
case 11:
num = (num <= 0L) ? ((long)0) : ((long)1);
break;
case 13:
num = (obj3 == DBNull.Value) ? ((long)0) : ((long)(-1));
break;
case 0x27:
num = (obj3 != DBNull.Value) ? ((long)0) : ((long)1);
break;
}
return((int)num);
}