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MySQLConstant.java
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456 lines (372 loc) · 13.5 KB
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package sqlancer.mysql.ast;
import java.math.BigInteger;
import sqlancer.IgnoreMeException;
import sqlancer.Randomly;
import sqlancer.mysql.MySQLSchema.MySQLDataType;
import sqlancer.mysql.ast.MySQLCastOperation.CastType;
public abstract class MySQLConstant implements MySQLExpression {
public boolean isInt() {
return false;
}
public boolean isNull() {
return false;
}
public abstract static class MySQLNoPQSConstant extends MySQLConstant {
@Override
public boolean asBooleanNotNull() {
throw throwException();
}
private RuntimeException throwException() {
throw new UnsupportedOperationException("not applicable for PQS evaluation!");
}
@Override
public MySQLConstant isEquals(MySQLConstant rightVal) {
return null;
}
@Override
public MySQLConstant castAs(CastType type) {
throw throwException();
}
@Override
public String castAsString() {
throw throwException();
}
@Override
public MySQLDataType getType() {
throw throwException();
}
@Override
protected MySQLConstant isLessThan(MySQLConstant rightVal) {
throw throwException();
}
}
public static class MySQLDoubleConstant extends MySQLNoPQSConstant {
private final double val;
public MySQLDoubleConstant(double val) {
this.val = val;
if (Double.isInfinite(val) || Double.isNaN(val)) {
// seems to not be supported by MySQL
throw new IgnoreMeException();
}
}
@Override
public String getTextRepresentation() {
return String.valueOf(val);
}
}
public static class MySQLTextConstant extends MySQLConstant {
private final String value;
private final boolean singleQuotes;
public MySQLTextConstant(String value) {
this.value = value;
singleQuotes = Randomly.getBoolean();
}
private void checkIfSmallFloatingPointText() {
boolean isSmallFloatingPointText = isString() && asBooleanNotNull()
&& castAs(CastType.SIGNED).getInt() == 0;
if (isSmallFloatingPointText) {
throw new IgnoreMeException();
}
}
@Override
public boolean asBooleanNotNull() {
// TODO implement as cast
for (int i = value.length(); i >= 0; i--) {
try {
String substring = value.substring(0, i);
Double val = Double.valueOf(substring);
return val != 0 && !Double.isNaN(val);
} catch (NumberFormatException e) {
// ignore
}
}
return false;
// return castAs(CastType.SIGNED).getInt() != 0;
}
@Override
public String getTextRepresentation() {
StringBuilder sb = new StringBuilder();
String quotes = singleQuotes ? "'" : "\"";
sb.append(quotes);
String text = value.replace(quotes, quotes + quotes).replace("\\", "\\\\");
sb.append(text);
sb.append(quotes);
return sb.toString();
}
@Override
public MySQLConstant isEquals(MySQLConstant rightVal) {
if (rightVal.isNull()) {
return MySQLConstant.createNullConstant();
} else if (rightVal.isInt()) {
checkIfSmallFloatingPointText();
if (asBooleanNotNull()) {
// TODO support SELECT .123 = '.123'; by converting to floating point
throw new IgnoreMeException();
}
return castAs(CastType.SIGNED).isEquals(rightVal);
} else if (rightVal.isString()) {
return MySQLConstant.createBoolean(value.equalsIgnoreCase(rightVal.getString()));
} else {
throw new AssertionError(rightVal);
}
}
@Override
public String getString() {
return value;
}
@Override
public boolean isString() {
return true;
}
@Override
public MySQLConstant castAs(CastType type) {
if (type == CastType.SIGNED || type == CastType.UNSIGNED) {
String value = this.value;
while (value.startsWith(" ") || value.startsWith("\t") || value.startsWith("\n")) {
if (value.startsWith("\n")) {
/* workaround for https://bugs.mysql.com/bug.php?id=96294 */
throw new IgnoreMeException();
}
value = value.substring(1);
}
for (int i = value.length(); i >= 0; i--) {
try {
String substring = value.substring(0, i);
long val = Long.parseLong(substring);
return MySQLConstant.createIntConstant(val, type == CastType.SIGNED);
} catch (NumberFormatException e) {
// ignore
}
}
return MySQLConstant.createIntConstant(0, type == CastType.SIGNED);
} else {
throw new AssertionError();
}
}
@Override
public String castAsString() {
return value;
}
@Override
public MySQLDataType getType() {
return MySQLDataType.VARCHAR;
}
@Override
protected MySQLConstant isLessThan(MySQLConstant rightVal) {
if (rightVal.isNull()) {
return MySQLConstant.createNullConstant();
} else if (rightVal.isInt()) {
if (asBooleanNotNull()) {
// TODO uspport floating point
throw new IgnoreMeException();
}
checkIfSmallFloatingPointText();
return castAs(rightVal.isSigned() ? CastType.SIGNED : CastType.UNSIGNED).isLessThan(rightVal);
} else if (rightVal.isString()) {
// unexpected result for '-' < "!";
// return
// MySQLConstant.createBoolean(value.compareToIgnoreCase(rightVal.getString()) <
// 0);
throw new IgnoreMeException();
} else {
throw new AssertionError(rightVal);
}
}
}
public static class MySQLIntConstant extends MySQLConstant {
private final long value;
private final String stringRepresentation;
private final boolean isSigned;
public MySQLIntConstant(long value, boolean isSigned) {
this.value = value;
this.isSigned = isSigned;
if (isSigned) {
stringRepresentation = String.valueOf(value);
} else {
stringRepresentation = Long.toUnsignedString(value);
}
}
public MySQLIntConstant(long value, String stringRepresentation) {
this.value = value;
this.stringRepresentation = stringRepresentation;
isSigned = true;
}
@Override
public boolean isInt() {
return true;
}
@Override
public long getInt() {
return value;
}
@Override
public boolean asBooleanNotNull() {
return value != 0;
}
@Override
public String getTextRepresentation() {
return stringRepresentation;
}
@Override
public MySQLConstant isEquals(MySQLConstant rightVal) {
if (rightVal.isInt()) {
return MySQLConstant.createBoolean(new BigInteger(getStringRepr())
.compareTo(new BigInteger(((MySQLIntConstant) rightVal).getStringRepr())) == 0);
} else if (rightVal.isNull()) {
return MySQLConstant.createNullConstant();
} else if (rightVal.isString()) {
if (rightVal.asBooleanNotNull()) {
// TODO support SELECT .123 = '.123'; by converting to floating point
throw new IgnoreMeException();
}
return isEquals(rightVal.castAs(CastType.SIGNED));
} else {
throw new AssertionError(rightVal);
}
}
@Override
public MySQLConstant castAs(CastType type) {
if (type == CastType.SIGNED) {
return new MySQLIntConstant(value, true);
} else if (type == CastType.UNSIGNED) {
return new MySQLIntConstant(value, false);
} else {
throw new AssertionError();
}
}
@Override
public String castAsString() {
if (isSigned) {
return String.valueOf(value);
} else {
return Long.toUnsignedString(value);
}
}
@Override
public MySQLDataType getType() {
return MySQLDataType.INT;
}
@Override
public boolean isSigned() {
return isSigned;
}
private String getStringRepr() {
if (isSigned) {
return String.valueOf(value);
} else {
return Long.toUnsignedString(value);
}
}
@Override
protected MySQLConstant isLessThan(MySQLConstant rightVal) {
if (rightVal.isInt()) {
long intVal = rightVal.getInt();
if (isSigned && rightVal.isSigned()) {
return MySQLConstant.createBoolean(value < intVal);
} else {
return MySQLConstant.createBoolean(new BigInteger(getStringRepr())
.compareTo(new BigInteger(((MySQLIntConstant) rightVal).getStringRepr())) < 0);
// return MySQLConstant.createBoolean(Long.compareUnsigned(value, intVal) < 0);
}
} else if (rightVal.isNull()) {
return MySQLConstant.createNullConstant();
} else if (rightVal.isString()) {
if (rightVal.asBooleanNotNull()) {
// TODO support float
throw new IgnoreMeException();
}
return isLessThan(rightVal.castAs(isSigned ? CastType.SIGNED : CastType.UNSIGNED));
} else {
throw new AssertionError(rightVal);
}
}
}
public static class MySQLNullConstant extends MySQLConstant {
@Override
public boolean isNull() {
return true;
}
@Override
public boolean asBooleanNotNull() {
throw new UnsupportedOperationException(this.toString());
}
@Override
public String getTextRepresentation() {
return "NULL";
}
@Override
public MySQLConstant isEquals(MySQLConstant rightVal) {
return MySQLConstant.createNullConstant();
}
@Override
public MySQLConstant castAs(CastType type) {
return this;
}
@Override
public String castAsString() {
return "NULL";
}
@Override
public MySQLDataType getType() {
return null;
}
@Override
protected MySQLConstant isLessThan(MySQLConstant rightVal) {
return this;
}
}
public long getInt() {
throw new UnsupportedOperationException();
}
public boolean isSigned() {
return false;
}
public String getString() {
throw new UnsupportedOperationException();
}
public boolean isString() {
return false;
}
public static MySQLConstant createNullConstant() {
return new MySQLNullConstant();
}
public static MySQLConstant createIntConstant(long value) {
return new MySQLIntConstant(value, true);
}
public static MySQLConstant createIntConstant(long value, boolean signed) {
return new MySQLIntConstant(value, signed);
}
public static MySQLConstant createUnsignedIntConstant(long value) {
return new MySQLIntConstant(value, false);
}
public static MySQLConstant createIntConstantNotAsBoolean(long value) {
return new MySQLIntConstant(value, String.valueOf(value));
}
@Override
public MySQLConstant getExpectedValue() {
return this;
}
public abstract boolean asBooleanNotNull();
public abstract String getTextRepresentation();
public static MySQLConstant createFalse() {
return MySQLConstant.createIntConstant(0);
}
public static MySQLConstant createBoolean(boolean isTrue) {
return MySQLConstant.createIntConstant(isTrue ? 1 : 0);
}
public static MySQLConstant createTrue() {
return MySQLConstant.createIntConstant(1);
}
@Override
public String toString() {
return getTextRepresentation();
}
public abstract MySQLConstant isEquals(MySQLConstant rightVal);
public abstract MySQLConstant castAs(CastType type);
public abstract String castAsString();
public static MySQLConstant createStringConstant(String string) {
return new MySQLTextConstant(string);
}
public abstract MySQLDataType getType();
protected abstract MySQLConstant isLessThan(MySQLConstant rightVal);
}