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/*
* Copyright (c) 1998-2012 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
*
* Free Software Foundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.quercus.env;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.io.Reader;
import java.io.UnsupportedEncodingException;
import java.util.IdentityHashMap;
import java.util.Locale;
import java.util.zip.CRC32;
import com.caucho.quercus.QuercusModuleException;
import com.caucho.quercus.QuercusRuntimeException;
import com.caucho.quercus.lib.file.BinaryInput;
import com.caucho.quercus.lib.i18n.Decoder;
import com.caucho.quercus.marshal.Marshal;
import com.caucho.util.ByteAppendable;
import com.caucho.util.LruCache;
import com.caucho.vfs.ReadStream;
import com.caucho.vfs.TempBuffer;
import com.caucho.vfs.WriteStream;
/**
* Represents a Quercus string value.
*/
abstract public class StringValue
extends Value
implements CharSequence, ByteAppendable
{
public static final StringValue EMPTY = new ConstStringValue("");
protected static final int MIN_LENGTH = 32;
protected static final int IS_STRING = 0;
protected static final int IS_LONG = 1;
protected static final int IS_DOUBLE = 2;
private static final LruCache _internMap
= new LruCache(8192);
/**
* Creates a string builder of the same type.
*/
abstract public StringValue createStringBuilder();
/**
* Creates a string builder of the same type.
*/
abstract public StringValue createStringBuilder(int length);
/**
* Creates the string.
*/
public static Value create(String value)
{
// XXX: needs updating for i18n, currently php5 only
if (value == null)
return NullValue.NULL;
else
return new ConstStringValue(value);
}
/**
* Creates the string.
*/
public static StringValue create(char value)
{
// XXX: needs updating for i18n, currently php5 only
return ConstStringValue.create(value);
/*
if (value < CHAR_STRINGS.length)
return CHAR_STRINGS[value];
else
return new StringBuilderValue(String.valueOf(value));
*/
}
/**
* Creates the string.
*/
public static Value create(Object value)
{
// XXX: needs updating for i18n, currently php5 only
if (value == null)
return NullValue.NULL;
else
return new StringBuilderValue(value.toString());
}
/*
* Decodes the Unicode str from charset.
*
* @param str should be a Unicode string
* @param charset to decode string from
*/
public StringValue create(Env env, StringValue unicodeStr, String charset)
{
if (! unicodeStr.isUnicode())
return unicodeStr;
try {
StringValue sb = createStringBuilder();
byte []bytes = unicodeStr.toString().getBytes(charset);
sb.append(bytes);
return sb;
}
catch (UnsupportedEncodingException e) {
env.warning(e);
return unicodeStr;
}
}
//
// Predicates and relations
//
/**
* Returns the type.
*/
public String getType()
{
return "string";
}
/**
* Returns the ValueType.
*/
@Override
public ValueType getValueType()
{
return ValueType.STRING;
}
/**
* Returns true for a long
*/
public boolean isLongConvertible()
{
return getValueType().isLongCmp();
}
/**
* Returns true for a double
*/
public boolean isDoubleConvertible()
{
return getValueType().isNumberCmp();
}
/**
* Returns true for a number
*/
public boolean isNumber()
{
return false;
}
/**
* Returns true for is_numeric
*/
@Override
public boolean isNumeric()
{
// php/120y
return getValueType().isNumberCmp();
}
/**
* Returns true for a scalar
*/
public boolean isScalar()
{
return true;
}
/**
* Returns true for StringValue
*/
@Override
public final boolean isString()
{
return true;
}
/**
* Returns true if the value is empty
*/
@Override
public boolean isEmpty()
{
return length() == 0 || length() == 1 && charAt(0) == '0';
}
@Override
public boolean isCallable(Env env, boolean isCheckSyntaxOnly, Value nameRef) {
if (nameRef != null) {
nameRef.set(this);
}
if (isCheckSyntaxOnly) {
return true;
}
return env.findFunction(this) != null;
}
//
// marshal cost
//
/**
* Cost to convert to a double
*/
@Override
public int toDoubleMarshalCost()
{
ValueType valueType = getValueType();
if (valueType.isLongCmp())
return Marshal.COST_TO_CHAR_ARRAY + 20;
else if (valueType.isNumberCmp())
return Marshal.COST_TO_CHAR_ARRAY + 10;
else
return Marshal.COST_INCOMPATIBLE;
}
/**
* Cost to convert to a float
*/
@Override
public int toFloatMarshalCost()
{
ValueType valueType = getValueType();
if (valueType.isLongCmp())
return Marshal.COST_TO_CHAR_ARRAY + 25;
else if (valueType.isNumberCmp())
return Marshal.COST_TO_CHAR_ARRAY + 15;
else
return Marshal.COST_INCOMPATIBLE;
}
/**
* Cost to convert to a long
*/
@Override
public int toLongMarshalCost()
{
ValueType valueType = getValueType();
if (valueType.isLongCmp())
return Marshal.COST_TO_CHAR_ARRAY + 10;
else if (valueType.isNumberCmp())
return Marshal.COST_TO_CHAR_ARRAY + 40;
else
return Marshal.COST_INCOMPATIBLE;
}
/**
* Cost to convert to an integer
*/
@Override
public int toIntegerMarshalCost()
{
ValueType valueType = getValueType();
if (valueType.isLongCmp())
return Marshal.COST_TO_CHAR_ARRAY + 10;
else if (valueType.isNumberCmp())
return Marshal.COST_TO_CHAR_ARRAY + 40;
else
return Marshal.COST_INCOMPATIBLE;
}
/**
* Cost to convert to a short
*/
@Override
public int toShortMarshalCost()
{
ValueType valueType = getValueType();
if (valueType.isLongCmp())
return Marshal.COST_TO_CHAR_ARRAY + 30;
else if (valueType.isNumberCmp())
return Marshal.COST_TO_CHAR_ARRAY + 50;
else
return Marshal.COST_INCOMPATIBLE;
}
/**
* Cost to convert to a byte
*/
@Override
public int toByteMarshalCost()
{
ValueType valueType = getValueType();
if (valueType.isLongCmp())
return Marshal.COST_TO_CHAR_ARRAY + 30;
else if (valueType.isNumberCmp())
return Marshal.COST_TO_CHAR_ARRAY + 50;
else
return Marshal.COST_STRING_TO_BYTE;
}
/**
* Cost to convert to a character
*/
@Override
public int toCharMarshalCost()
{
return Marshal.COST_STRING_TO_CHAR;
}
/**
* Cost to convert to a String
*/
@Override
public int toStringMarshalCost()
{
return Marshal.COST_EQUAL;
}
/**
* Cost to convert to a char[]
*/
@Override
public int toCharArrayMarshalCost()
{
return Marshal.COST_STRING_TO_CHAR_ARRAY;
}
/**
* Cost to convert to a StringValue
*/
public int toStringValueMarshalCost()
{
return Marshal.COST_IDENTICAL;
}
/**
* Cost to convert to a binary value
*/
@Override
public int toBinaryValueMarshalCost()
{
return Marshal.COST_STRING_TO_BINARY;
}
/**
* Returns true for equality
*/
public int cmp(Value rValue)
{
if (rValue.isString()) {
if (isNumberConvertible() && rValue.isNumberConvertible()) {
double l = toDouble();
double r = rValue.toDouble();
if (l == r) {
return 0;
}
else if (l < r) {
return -1;
}
else
return 1;
}
else {
return toString().compareTo(rValue.toString());
}
}
else {
int result = rValue.cmp(this);
if (result == 0) {
return 0;
}
else if (result > 0) {
return -1;
}
else {
return 1;
}
}
}
/**
* Returns true for equality
*/
@Override
public boolean eq(Value rValue)
{
ValueType typeA = getValueType();
ValueType typeB = rValue.getValueType();
if (typeB.isNumber()) {
double l = toDouble();
double r = rValue.toDouble();
return l == r;
}
else if (typeB.isBoolean()) {
return toBoolean() == rValue.toBoolean();
}
else if (typeA.isNumberCmp() && typeB.isNumberCmp()) {
double l = toDouble();
double r = rValue.toDouble();
return l == r;
}
else if (rValue.isObject()) {
return super.eq(rValue);
}
else {
return toString().equals(rValue.toString());
}
}
/**
* Compare two strings
*/
public int cmpString(StringValue rValue)
{
return toString().compareTo(rValue.toString());
}
// Conversions
/**
* Converts to a string value.
*/
@Override
public StringValue toStringValue()
{
return this;
}
/**
* Converts to a string value.
*/
@Override
public StringValue toStringValue(Env env)
{
return this;
}
/**
* Converts to a long.
*/
public static long toLong(String string)
{
return parseLong(string);
}
/**
* String to long conversion routines used by this module
* and other modules in this package. These methods are
* only invoked by other implementations of a "string" object.
* The 3 implementations should be identical except for the
* char data source.
*/
static long parseLong(char []buffer, int offset, int len)
{
if (len == 0)
return 0;
long value = 0;
long sign = 1;
boolean isResultSet = false;
long result = 0;
int end = offset + len;
while (offset < end && Character.isWhitespace(buffer[offset])) {
offset++;
}
int ch;
if (offset + 1 < end && buffer[offset] == '0'
&& ((ch = buffer[offset + 1]) == 'x' || ch == 'X')) {
for (offset += 2; offset < end; offset++) {
ch = buffer[offset] & 0xFF;
long oldValue = value;
if ('0' <= ch && ch <= '9')
value = value * 16 + ch - '0';
else if ('a' <= ch && ch <= 'z')
value = value * 16 + ch - 'a' + 10;
else if ('A' <= ch && ch <= 'Z')
value = value * 16 + ch - 'A' + 10;
else
return value;
if (value < oldValue)
return Integer.MAX_VALUE;
}
return value;
}
if (offset < end && buffer[offset] == '-') {
sign = -1;
offset++;
}
else if (offset < end && buffer[offset] == '+') {
sign = +1;
offset++;
}
while (offset < end) {
ch = buffer[offset++];
if ('0' <= ch && ch <= '9') {
long newValue = 10 * value + ch - '0';
if (newValue < value) {
// php/0143
// long value overflowed
result = Integer.MAX_VALUE;
isResultSet = true;
break;
}
value = newValue;
}
else {
result = sign * value;
isResultSet = true;
break;
}
}
if (! isResultSet)
result = sign * value;
return result;
}
static long parseLong(byte []buffer, int offset, int len)
{
if (len == 0)
return 0;
long value = 0;
long sign = 1;
boolean isResultSet = false;
long result = 0;
int end = offset + len;
while (offset < end && Character.isWhitespace(buffer[offset])) {
offset++;
}
int ch;
if (offset + 1 < end && buffer[offset] == '0'
&& ((ch = buffer[offset + 1]) == 'x' || ch == 'X')) {
for (offset += 2; offset < end; offset++) {
ch = buffer[offset] & 0xFF;
long oldValue = value;
if ('0' <= ch && ch <= '9')
value = value * 16 + ch - '0';
else if ('a' <= ch && ch <= 'z')
value = value * 16 + ch - 'a' + 10;
else if ('A' <= ch && ch <= 'Z')
value = value * 16 + ch - 'A' + 10;
else
return value;
if (value < oldValue)
return Integer.MAX_VALUE;
}
return value;
}
if (offset < end && buffer[offset] == '-') {
sign = -1;
offset++;
}
else if (offset < end && buffer[offset] == '+') {
sign = +1;
offset++;
}
while (offset < end) {
ch = buffer[offset++];
if ('0' <= ch && ch <= '9') {
long newValue = 10 * value + ch - '0';
if (newValue < value) {
// long value overflowed, set result to integer max
result = Integer.MAX_VALUE;
isResultSet = true;
break;
}
value = newValue;
}
else {
result = sign * value;
isResultSet = true;
break;
}
}
if (! isResultSet)
result = sign * value;
return result;
}
static long parseLong(CharSequence string)
{
final int len = string.length();
if (len == 0)
return 0;
long value = 0;
long sign = 1;
boolean isResultSet = false;
long result = 0;
int offset = 0;
int end = offset + len;
while (offset < end && Character.isWhitespace(string.charAt(offset))) {
offset++;
}
if (offset < end && string.charAt(offset) == '-') {
sign = -1;
offset++;
}
else if (offset < end && string.charAt(offset) == '+') {
sign = +1;
offset++;
}
while (offset < end) {
int ch = string.charAt(offset++);
if ('0' <= ch && ch <= '9') {
long newValue = 10 * value + ch - '0';
if (newValue < value) {
// long value overflowed, set result to integer max
result = Integer.MAX_VALUE;
isResultSet = true;
break;
}
value = newValue;
}
else {
result = sign * value;
isResultSet = true;
break;
}
}
if (! isResultSet)
result = sign * value;
return result;
}
/**
* Converts to a double.
*/
public double toDouble()
{
return toDouble(toString());
}
/**
* Converts to a double.
*/
public static double toDouble(String s)
{
int len = s.length();
int start = 0;
int i = 0;
int ch = 0;
while (i < len && Character.isWhitespace(s.charAt(i))) {
start++;
i++;
}
if (i + 1 < len && s.charAt(i) == '0'
&& ((ch = s.charAt(i)) == 'x' || ch == 'X')) {
double value = 0;
for (i += 2; i < len; i++) {
ch = s.charAt(i);
if ('0' <= ch && ch <= '9')
value = value * 16 + ch - '0';
else if ('a' <= ch && ch <= 'z')
value = value * 16 + ch - 'a' + 10;
else if ('A' <= ch && ch <= 'Z')
value = value * 16 + ch - 'A' + 10;
else
return value;
}
return value;
}
if (i < len && ((ch = s.charAt(i)) == '+' || ch == '-')) {
i++;
}
for (; i < len && '0' <= (ch = s.charAt(i)) && ch <= '9'; i++) {
}
if (ch == '.') {
for (i++; i < len && '0' <= (ch = s.charAt(i)) && ch <= '9'; i++) {
}
}
if (ch == 'e' || ch == 'E') {
int e = i++;
if (i < len && (ch = s.charAt(i)) == '+' || ch == '-') {
i++;
}
for (; i < len && '0' <= (ch = s.charAt(i)) && ch <= '9'; i++) {
}
if (i == e + 1)
i = e;
}
if (i == 0)
return 0;
else if (i == len && start == 0)
return Double.parseDouble(s);
else
return Double.parseDouble(s.substring(start, i));
}
/**
* Converts to a boolean.
*/
public boolean toBoolean()
{
int length = length();
if (length == 0)
return false;
else if (length > 1)
return true;
else
return charAt(0) != '0';
}
/**
* Converts to a key.
*/
public Value toKey()
{
int len = length();
if (len == 0)
return this;
int sign = 1;
long value = 0;
int i = 0;
char ch = charAt(i);
if (ch == '-') {
if (len == 1)
return this;
sign = -1;
i++;
}
for (; i < len; i++) {
ch = charAt(i);
if ('0' <= ch && ch <= '9')
value = 10 * value + ch - '0';
else
return this;
}
return LongValue.create(sign * value);
}
/**
* Converts to an object.
*/
@Override
final public Value toAutoObject(Env env)
{
return env.createObject();
}
/**
* Converts to an array if null.
*/
@Override
public Value toAutoArray()
{
if (length() == 0)
return new ArrayValueImpl();
else
return this;
}
/**
* Converts to a Java object.
*/
public Object toJavaObject()
{
return toString();
}
/**
* Takes the values of this array, unmarshalls them to objects of type
* elementType, and puts them in a java array.
*/
@Override
public Object valuesToArray(Env env, Class elementType)
{
if (char.class.equals(elementType)) {
return toUnicode(env).toCharArray();
}
else if (Character.class.equals(elementType)) {
char[] chars = toUnicode(env).toCharArray();
int length = chars.length;
Character[] charObjects = new Character[length];
for (int i = 0; i < length; i++) {
charObjects[i] = Character.valueOf(chars[i]);
}
return charObjects;
}
else if (byte.class.equals(elementType)) {
return toBinaryValue(env).toBytes();
}
else if (Byte.class.equals(elementType)) {
byte[] bytes = toBinaryValue(env).toBytes();
int length = bytes.length;
Byte[] byteObjects = new Byte[length];
for (int i = 0; i < length; i++) {
byteObjects[i] = Byte.valueOf(bytes[i]);
}
return byteObjects;
}
else {
env.error(L.l("Can't assign {0} with type {1} to {2}",
this,
this.getClass(),
elementType));
return null;
}
}
/**
* Converts to a callable object
*/
@Override
public Callable toCallable(Env env, boolean isOptional)
{
// php/1h0o
if (isEmpty()) {
return super.toCallable(env, isOptional);
}
int p = indexOf("::");
if (p < 0)
return new CallbackFunction(env, this);
else {
StringValue className = substring(0, p);
StringValue methodName = substring(p + 2);
QuercusClass cl = env.findClass(className.toString());
if (cl == null) {
env.warning(L.l("can't find class {0}", className));
return super.toCallable(env, false);
}
return new CallbackClassMethod(cl, methodName);
}
}
/**
* Sets the array value, returning the new array, e.g. to handle
* string update ($a[0] = 'A'). Creates an array automatically if
* necessary.
*/
@Override
public Value append(Value index, Value value)
{
if (length() == 0)
return new ArrayValueImpl().append(index, value);
else
return this;
}
/**
* Appends a value to an array that is a field of an object.
*/
@Override
public Value putThisFieldArray(Env env,
Value obj,
StringValue fieldName,
Value index,
Value value)
{
// php/03mm
Value newFieldValue = setCharValueAt(index.toLong(), value);
if (newFieldValue != this) {
obj.putThisField(env, fieldName, newFieldValue);
}
return newFieldValue.get(index);
}
// Operations
/**
* Returns the character at an index
*/
public Value get(Value key)
{
return charValueAt(key.toLong());
}
/**
* Returns the character at an index
*/
public Value getArg(Value key, boolean isTop)
{
// php/03ma
return charValueAt(key.toLong());
}
/**
* Returns the character at an index
*/
@Override
public Value charValueAt(long index)
{
int len = length();
if (index < 0 || len <= index)
return UnsetUnicodeValue.UNSET;
else {
return StringValue.create(charAt((int) index));
}
}
/**
* sets the character at an index
*/
@Override
public Value setCharValueAt(long index, Value value)
{
//XXX: need to double-check this for non-string values
int len = length();
if (index < 0 || len <= index)
return this;
else {
return (createStringBuilder()
.append(this, 0, (int) index)
.append(value)
.append(this, (int) (index + 1), length()));
}
}
/**
* Increment the following value.
*/
@Override
public Value increment(int incr)
{
// php/03i6
if (length() == 0) {
if (incr == 1)
return createStringBuilder().append("1");
else
return LongValue.MINUS_ONE;
}
if (incr > 0) {
StringBuilder tail = new StringBuilder();
for (int i = length() - 1; i >= 0; i--) {
char ch = charAt(i);
if (ch == 'z') {
if (i == 0)
return createStringBuilder().append("aa").append(tail);
else
tail.insert(0, 'a');
}
else if ('a' <= ch && ch < 'z') {
return (createStringBuilder()
.append(this, 0, i)
.append((char) (ch + 1))
.append(tail));
}
else if (ch == 'Z') {
if (i == 0)
return createStringBuilder().append("AA").append(tail);
else
tail.insert(0, 'A');
}
else if ('A' <= ch && ch < 'Z') {
return (createStringBuilder()
.append(this, 0, i)
.append((char) (ch + 1))
.append(tail));
}
else if ('0' <= ch && ch <= '9' && i == length() - 1) {
return LongValue.create(toLong() + incr);
}
}
return createStringBuilder().append(tail.toString());
}
else if (getValueType().isLongAdd()) {
return LongValue.create(toLong() + incr);
}
else {
return this;
}
}
/**
* Adds to the following value.
*/
public Value add(long rValue)
{
if (getValueType().isLongAdd())
return LongValue.create(toLong() + rValue);
return DoubleValue.create(toDouble() + rValue);
}
/**
* Adds to the following value.
*/
public Value sub(long rValue)
{
if (getValueType().isLongAdd())
return LongValue.create(toLong() - rValue);
return DoubleValue.create(toDouble() - rValue);
}
/*
* Bit and.
*/
@Override
public Value bitAnd(Value rValue)
{
if (rValue.isString()) {
StringValue rStr = (StringValue) rValue;
int len = Math.min(length(), rValue.length());
StringValue sb = createStringBuilder();
for (int i = 0; i < len; i++) {
char l = charAt(i);
char r = rStr.charAt(i);
sb.appendByte(l & r);
}
return sb;
}
else
return LongValue.create(toLong() & rValue.toLong());
}
/*
* Bit or.
*/
@Override
public Value bitOr(Value rValue)
{
if (rValue.isString()) {
StringValue rStr = (StringValue) rValue;
int len = Math.min(length(), rValue.length());
StringValue sb = createStringBuilder();
for (int i = 0; i < len; i++) {
char l = charAt(i);
char r = rStr.charAt(i);
sb.appendByte(l | r);
}
if (len != length())
sb.append(substring(len));
else if (len != rStr.length())
sb.append(rStr.substring(len));
return sb;
}
else
return LongValue.create(toLong() | rValue.toLong());
}
/*
* Bit xor.
*/
@Override
public Value bitXor(Value rValue)
{
if (rValue.isString()) {
StringValue rStr = rValue.toStringValue();
int len = Math.min(length(), rValue.length());
StringValue sb = createStringBuilder();
for (int i = 0; i < len; i++) {
char l = charAt(i);
char r = rStr.charAt(i);
sb.appendByte(l ^ r);
}
return sb;
}
else
return LongValue.create(toLong() ^ rValue.toLong());
}
/**
* Serializes the value.
*/
@Override
public void serialize(Env env, StringBuilder sb)
{
sb.append("s:");
sb.append(length());
sb.append(":\"");
sb.append(toString());
sb.append("\";");
}
/**
* Encodes the value in JSON.
*/
@Override
public void jsonEncode(Env env, JsonEncodeContext context, StringValue sb)
{
if (context.isCheckNumeric()) {
if (isLongConvertible()) {
toLongValue().jsonEncode(env, context, sb);
return;
}
else if (isDoubleConvertible()) {
toDoubleValue().jsonEncode(env, context, sb);
return;
}
}
sb.append('"');
int len = length();
for (int i = 0; i < len; i++) {
char c = charAt(i);
switch (c) {
case '\b':
sb.append('\\');
sb.append('b');
break;
case '\f':
sb.append('\\');
sb.append('f');
break;
case '\n':
sb.append('\\');
sb.append('n');
break;
case '\r':
sb.append('\\');
sb.append('r');
break;
case '\t':
sb.append('\\');
sb.append('t');
break;
case '\\':
sb.append('\\');
sb.append('\\');
break;
case '"':
if (context.isEscapeQuote()) {
sb.append("\\u0022");
}
else {
sb.append('\\');
sb.append('"');
}
break;
case '/':
sb.append('\\');
sb.append('/');
break;
default:
if (c <= 0x1f) {
jsonEncodeUnicode(sb, c);
}
else if (c < 0x80) {
jsonEncodeAscii(context, sb, c);
}
else if ((c & 0xe0) == 0xc0 && i + 1 < len) {
int c1 = charAt(i + 1);
i++;
int ch = ((c & 0x1f) << 6) + (c1 & 0x3f);
jsonEncodeUnicode(sb, ch);
}
else if ((c & 0xf0) == 0xe0 && i + 2 < len) {
int c1 = charAt(i + 1);
int c2 = charAt(i + 2);
i += 2;
int ch = ((c & 0x0f) << 12) + ((c1 & 0x3f) << 6) + (c2 & 0x3f);
jsonEncodeUnicode(sb, ch);
}
else {
// technically illegal
jsonEncodeUnicode(sb, c);
}
break;
}
}
sb.append('"');
}
private void jsonEncodeUnicode(StringValue sb, int c)
{
sb.append('\\');
sb.append('u');
int d = (c >> 12) & 0xf;
if (d < 10)
sb.append((char) ('0' + d));
else
sb.append((char) ('a' + d - 10));
d = (c >> 8) & 0xf;
if (d < 10)
sb.append((char) ('0' + d));
else
sb.append((char) ('a' + d - 10));
d = (c >> 4) & 0xf;
if (d < 10)
sb.append((char) ('0' + d));
else
sb.append((char) ('a' + d - 10));
d = (c) & 0xf;
if (d < 10)
sb.append((char) ('0' + d));
else
sb.append((char) ('a' + d - 10));
}
private void jsonEncodeAscii(JsonEncodeContext context,
StringValue sb,
char ch)
{
switch (ch) {
case '<':
if (context.isEscapeTag()) {
sb.append("\\u003C");
}
else {
sb.append(ch);
}
break;
case '>':
if (context.isEscapeTag()) {
sb.append("\\u003E");
}
else {
sb.append(ch);
}
break;
case '&':
if (context.isEscapeAmp()) {
sb.append("\\u0026");
}
else {
sb.append(ch);
}
break;
case '\'':
if (context.isEscapeApos()) {
sb.append("\\u0027");
}
else {
sb.append(ch);
}
break;
case '"':
if (context.isEscapeQuote()) {
sb.append("\\u0022");
}
else {
sb.append(ch);
}
break;
default:
sb.append(ch);
}
}
/*
* Returns a value to be used as a key for the deserialize cache.
*/
/*
public StringValue toSerializeKey()
{
if (length() <= 4096)
return this;
try {
MessageDigest md = MessageDigest.getInstance("SHA1");
byte []buffer = toBytes();
md.update(buffer, 0, buffer.length);
//XXX: create a special serialize type?
return new StringBuilderValue(md.digest());
} catch (NoSuchAlgorithmException e) {
throw new QuercusException(e);
}
}
*/
//
// append code
//
/**
* Append a Java string to the value.
*/
public StringValue append(String s)
{
throw new UnsupportedOperationException(getClass().getName());
}
/**
* Append a Java string to the value.
*/
public StringValue append(String s, int start, int end)
{
throw new UnsupportedOperationException(getClass().getName());
}
/**
* Append a Java buffer to the value.
*/
public StringValue append(char []buf, int offset, int length)
{
throw new UnsupportedOperationException(getClass().getName());
}
/**
* Append a Java double to the value.
*/
public StringValue append(char []buf)
{
return append(buf, 0, buf.length);
}
/**
* Append a Java buffer to the value.
*/
public StringValue append(CharSequence buf, int head, int tail)
{
throw new UnsupportedOperationException(getClass().getName());
}
/**
* Append a Java buffer to the value.
*/
public StringValue append(StringBuilderValue sb, int head, int tail)
{
return append((CharSequence) sb, head, tail);
}
/**
* Append a Java buffer to the value.
*/
public StringValue append(UnicodeBuilderValue sb, int head, int tail)
{
return append((CharSequence) sb, head, tail);
}
/*
* Appends a Unicode string to the value.
*
* @param str should be a Unicode string
* @param charset to decode string from
*/
public StringValue append(Env env, StringValue unicodeStr, String charset)
{
if (! unicodeStr.isUnicode())
return append(unicodeStr);
try {
byte []bytes = unicodeStr.toString().getBytes(charset);
append(bytes);
return this;
}
catch (UnsupportedEncodingException e) {
env.warning(e);
return append(unicodeStr);
}
}
/**
* Append a Java char to the value.
*/
public StringValue append(char v)
{
throw new UnsupportedOperationException(getClass().getName());
}
/**
* Append a Java boolean to the value.
*/
public StringValue append(boolean v)
{
return append(v ? "true" : "false");
}
/**
* Append a Java long to the value.
*/
public StringValue append(long v)
{
return append(String.valueOf(v));
}
/**
* Append a Java double to the value.
*/
public StringValue append(double v)
{
return append(String.valueOf(v));
}
/**
* Append a Java value to the value.
*/
public StringValue append(Object v)
{
return append(String.valueOf(v));
}
/**
* Append a Java value to the value.
*/
public StringValue append(Value v)
{
throw new UnsupportedOperationException(getClass().getName());
}
/**
* Ensure enough append capacity.
*/
public void ensureAppendCapacity(int size)
{
throw new UnsupportedOperationException(getClass().getName());
}
/**
* Append a byte buffer to the value.
*/
public StringValue append(byte []buf, int offset, int length)
{
throw new UnsupportedOperationException(getClass().getName());
}
/**
* Append a byte buffer to the value.
*/
public StringValue append(byte []buf)
{
return append(buf, 0, buf.length);
}
/**
* Append a byte buffer to the value.
*/
public StringValue appendUtf8(byte []buf, int offset, int length)
{
throw new UnsupportedOperationException(getClass().getName());
}
/**
* Append a byte buffer to the value.
*/
public StringValue appendUtf8(byte []buf)
{
return appendUtf8(buf, 0, buf.length);
}
/**
* Append to a string builder.
*/
@Override
public StringValue appendTo(UnicodeBuilderValue sb)
{
int length = length();
for (int i = 0; i < length; i++)
sb.append(charAt(i));
return this;
}
/**
* Append a Java boolean to the value.
*/
public StringValue appendUnicode(boolean v)
{
return append(v ? "true" : "false");
}
/**
* Append a Java long to the value.
*/
public StringValue appendUnicode(long v)
{
return append(String.valueOf(v));
}
/**
* Append a Java double to the value.
*/
public StringValue appendUnicode(double v)
{
return append(String.valueOf(v));
}
/**
* Append a Java value to the value.
*/
public StringValue appendUnicode(Object v)
{
return append(String.valueOf(v));
}
/**
* Append a Java char, possibly converting to a unicode string
*/
public StringValue appendUnicode(char v)
{
return append(v);
}
/**
* Append a Java char buffer, possibly converting to a unicode string
*/
public StringValue appendUnicode(char []buffer, int offset, int length)
{
return append(buffer, offset, length);
}
/**
* Append a Java char buffer, possibly converting to a unicode string
*/
public StringValue appendUnicode(char []buffer)
{
return append(buffer);
}
/**
* Append a Java char buffer, possibly converting to a unicode string
*/
public StringValue appendUnicode(String value)
{
return append(value);
}
/**
* Append a Java char buffer, possibly converting to a unicode string
*/
public StringValue appendUnicode(String value, int offset, int length)
{
return append(value, offset, length);
}
/**
* Append a Java char buffer, possibly converting to a unicode string
*/
public StringValue appendUnicode(Value value)
{
return append(value);
}
/**
* Append a Java char buffer, possibly converting to a unicode string
*/
public StringValue appendUnicode(Value v1, Value v2)
{
return append(v1).append(v2);
}
/**
* Append a Java byte to the value without conversions.
*/
public StringValue appendByte(int v)
{
throw new UnsupportedOperationException(getClass().getName());
}
/**
* Append a Java String to the value without conversions.
*/
public StringValue appendBytes(String s)
{
StringValue sb = this;
for (int i = 0; i < s.length(); i++) {
sb = sb.appendByte(s.charAt(i));
}
return sb;
}
/**
* Append a Java String to the value without conversions.
*/
public StringValue appendBytes(StringValue s)
{
StringValue sb = this;
for (int i = 0; i < s.length(); i++) {
sb = sb.appendByte(s.charAt(i));
}
return sb;
}
/**
* Append a Java char[] to the value without conversions.
*/
public StringValue appendBytes(char []buf, int offset, int length)
{
StringValue sb = this;
int end = Math.min(buf.length, offset + length);
while (offset < end) {
sb = sb.appendByte(buf[offset++]);
}
return sb;
}
/**
* Append Java bytes to the value without conversions.
*/
public StringValue appendBytes(byte []bytes, int offset, int end)
{
StringValue sb = this;
while (offset < end) {
sb = sb.appendByte(bytes[offset++]);
}
return sb;
}
/**
* Append from a temp buffer list
*/
public StringValue append(TempBuffer ptr)
{
for (; ptr != null; ptr = ptr.getNext()) {
append(ptr.getBuffer(), 0, ptr.getLength());
}
return this;
}
/**
* Append from a read stream
*/
public StringValue append(Reader reader)
throws IOException
{
int ch;
while ((ch = reader.read()) >= 0) {
append((char) ch);
}
return this;
}
/**
* Append from a read stream
*/
public StringValue append(Reader reader, long length)
throws IOException
{
int ch;
while (length-- > 0 && (ch = reader.read()) >= 0) {
append((char) ch);
}
return this;
}
/**
* Append from an input stream, using InputStream.read semantics,
* i.e. just call is.read once even if more data is available.
*/
public int appendRead(InputStream is, long length)
{
TempBuffer tBuf = TempBuffer.allocate();
try {
byte []buffer = tBuf.getBuffer();
int sublen = buffer.length;
if (length < sublen)
sublen = (int) length;
sublen = is.read(buffer, 0, sublen);
if (sublen > 0)
append(buffer, 0, sublen);
return sublen;
} catch (IOException e) {
throw new QuercusModuleException(e);
} finally {
TempBuffer.free(tBuf);
}
}
/**
* Append from an input stream, reading from the input stream until
* end of file or the length is reached.
*/
public int appendReadAll(InputStream is, long length)
{
TempBuffer tBuf = TempBuffer.allocate();
try {
byte []buffer = tBuf.getBuffer();
int readLength = 0;
while (length > 0) {
int sublen = buffer.length;
if (length < sublen)
sublen = (int) length;
sublen = is.read(buffer, 0, sublen);
if (sublen > 0) {
append(buffer, 0, sublen);
length -= sublen;
readLength += sublen;
}
else
return readLength > 0 ? readLength : -1;
}
return readLength;
} catch (IOException e) {
throw new QuercusModuleException(e);
} finally {
TempBuffer.free(tBuf);
}
}
/**
* Append from an input stream, reading from the input stream until
* end of file or the length is reached.
*/
public int appendReadAll(ReadStream is, long length)
{
TempBuffer tBuf = TempBuffer.allocate();
try {
byte []buffer = tBuf.getBuffer();
int readLength = 0;
while (length > 0) {
int sublen = buffer.length;
if (length < sublen)
sublen = (int) length;
sublen = is.read(buffer, 0, sublen);
if (sublen > 0) {
append(buffer, 0, sublen);
length -= sublen;
readLength += sublen;
}
else
return readLength > 0 ? readLength : -1;
}
return readLength;
} catch (IOException e) {
throw new QuercusModuleException(e);
} finally {
TempBuffer.free(tBuf);
}
}
/**
* Append from an input stream, using InputStream semantics, i.e
* call is.read() only once.
*/
public int appendRead(BinaryInput is, long length)
{
TempBuffer tBuf = TempBuffer.allocate();
try {
int readLength = 0;
byte []buffer = tBuf.getBuffer();
while (length > 0) {
int sublen = Math.min((int) length, buffer.length);
if (readLength > 0 && is.getAvailable() <= 0) {
return readLength;
}
sublen = is.read(buffer, 0, sublen);
if (sublen > 0) {
append(buffer, 0, sublen);
readLength += sublen;
length -= sublen;
}
else {
return readLength > 0 ? readLength: sublen;
}
}
return readLength;
} catch (IOException e) {
throw new QuercusModuleException(e);
} finally {
TempBuffer.free(tBuf);
}
}
/**
* Append from an input stream, reading all available data from the
* stream.
*/
public int appendReadAll(BinaryInput is, long length)
{
TempBuffer tBuf = TempBuffer.allocate();
try {
byte []buffer = tBuf.getBuffer();
int readLength = 0;
while (length > 0) {
int sublen = buffer.length;
if (length < sublen)
sublen = (int) length;
sublen = is.read(buffer, 0, sublen);
if (sublen > 0) {
append(buffer, 0, sublen);
length -= sublen;
readLength += sublen;
}
else
return readLength > 0 ? readLength : -1;
}
return readLength;
} catch (IOException e) {
throw new QuercusModuleException(e);
} finally {
TempBuffer.free(tBuf);
}
}
/**
* Exports the value.
*/
@Override
protected void varExportImpl(StringValue sb, int level)
{
sb.append("'");
int len = length();
for (int i = 0; i < len; i++) {
char ch = charAt(i);
switch (ch) {
case '\'':
sb.append("\\'");
break;
case '\\':
sb.append("\\\\");
break;
default:
sb.append(ch);
}
}
sb.append("'");
}
//
// CharSequence
//
/**
* Returns the length of the string.
*/
public int length()
{
return toString().length();
}
/**
* Returns the character at a particular location
*/
public char charAt(int index)
{
return toString().charAt(index);
}
/**
* Returns a subsequence
*/
public CharSequence subSequence(int start, int end)
{
return new StringBuilderValue(toString().substring(start, end));
}
/**
* Sets the length.
*/
public void setLength(int length)
{
throw new UnsupportedOperationException();
}
//
// java.lang.String methods
//
/**
* Returns the first index of the match string, starting from the head.
*/
public final int indexOf(CharSequence match)
{
return indexOf(match, 0);
}
/**
* Returns the first index of the match string, starting from the head.
*/
public int indexOf(CharSequence match, int head)
{
int length = length();
int matchLength = match.length();
if (matchLength <= 0)
return -1;
else if (head < 0)
return -1;
int end = length - matchLength;
char first = match.charAt(0);
loop:
for (; head <= end; head++) {
if (charAt(head) != first)
continue;
for (int i = 1; i < matchLength; i++) {
if (charAt(head + i) != match.charAt(i))
continue loop;
}
return head;
}
return -1;
}
/**
* Returns the last index of the match string, starting from the head.
*/
public int indexOf(char match)
{
return indexOf(match, 0);
}
/**
* Returns the last index of the match string, starting from the head.
*/
public int indexOf(char match, int head)
{
int length = length();
for (; head < length; head++) {
if (charAt(head) == match)
return head;
}
return -1;
}
/**
* Returns the last index of the match string, starting from the head.
*/
public final int lastIndexOf(char match)
{
return lastIndexOf(match, Integer.MAX_VALUE);
}
/**
* Returns the last index of the match string, starting from the head.
*/
public int lastIndexOf(char match, int tail)
{
int length = length();
if (tail >= length)
tail = length - 1;
for (; tail >= 0; tail--) {
if (charAt(tail) == match)
return tail;
}
return -1;
}
/**
* Returns the last index of the match string, starting from the tail.
*/
public int lastIndexOf(CharSequence match)
{
return lastIndexOf(match, Integer.MAX_VALUE);
}
/**
* Returns the last index of the match string, starting from the tail.
*/
public int lastIndexOf(CharSequence match, int tail)
{
int length = length();
int matchLength = match.length();
if (matchLength <= 0)
return -1;
if (tail < 0)
return -1;
if (tail > length - matchLength)
tail = length - matchLength;
char first = match.charAt(0);
loop:
for (; tail >= 0; tail--) {
if (charAt(tail) != first)
continue;
for (int i = 1; i < matchLength; i++) {
if (charAt(tail + i) != match.charAt(i))
continue loop;
}
return tail;
}
return -1;
}
/**
* Returns true if the region matches
*/
public boolean regionMatches(int offset,
char []mBuffer, int mOffset, int mLength)
{
int length = length();
if (length < offset + mLength) {
return false;
}
for (int i = 0; i < mLength; i++) {
if (charAt(offset + i) != mBuffer[mOffset + i]) {
return false;
}
}
return true;
}
/**
* Returns true if the region matches
*/
public boolean regionMatches(int offset,
StringValue match, int mOffset, int mLength)
{
int length = length();
if (length < offset + mLength)
return false;
for (int i = 0; i < mLength; i++) {
if (charAt(offset + i) != match.charAt(mOffset + i))
return false;
}
return true;
}
/**
* Returns true if the region matches
*/
public boolean regionMatchesIgnoreCase(int offset,
char []match,
int mOffset,
int mLength)
{
int length = length();
if (length < offset + mLength)
return false;
for (int i = 0; i < mLength; i++) {
char a = Character.toLowerCase(charAt(offset + i));
char b = Character.toLowerCase(match[mOffset + i]);
if (a != b)
return false;
}
return true;
}
/**
* Returns true if the string begins with another string.
*/
public boolean startsWith(CharSequence head)
{
int len = length();
int headLen = head.length();
if (len < headLen) {
return false;
}
for (int i = 0; i < headLen; i++) {
if (charAt(i) != head.charAt(i))
return false;
}
return true;
}
/**
* Returns true if the string ends with another string.
*/
public boolean endsWith(CharSequence tail)
{
int len = length();
int tailLen = tail.length();
int offset = len - tailLen;
if (offset < 0)
return false;
for (int i = 0; i < tailLen; i++) {
if (charAt(offset + i) != tail.charAt(i))
return false;
}
return true;
}
/**
* Returns a StringValue substring.
*/
public StringValue substring(int head)
{
return (StringValue) subSequence(head, length());
}
/**
* Returns a StringValue substring.
*/
public StringValue substring(int begin, int end)
{
return (StringValue) subSequence(begin, end);
}
/**
* Returns a String substring
*/
public String stringSubstring(int begin, int end)
{
return substring(begin, end).toString();
}
/**
* Returns a character array
*/
public char []toCharArray()
{
int length = length();
char []array = new char[length()];
getChars(0, array, 0, length);
return array;
}
public char []getRawCharArray()
{
return toCharArray();
}
/**
* Copies the chars
*/
public void getChars(int stringOffset, char []buffer, int offset, int length)
{
for (int i = 0; i < length; i++)
buffer[offset + i] = charAt(stringOffset + i);
}
public final StringValue toLowerCase()
{
return toLowerCase(Locale.ENGLISH);
}
/**
* Convert to lower case.
*/
public StringValue toLowerCase(Locale locale)
{
int length = length();
boolean isUpperCase = false;
for (int i = 0; i < length; i++) {
char ch = charAt(i);
if ('a' <= ch && ch <= 'z') {
}
else if ('A' <= ch && ch <= 'Z') {
isUpperCase = true;
break;
}
else if (isUnicode() && Character.isUpperCase(ch)) {
isUpperCase = true;
break;
}
}
if (! isUpperCase) {
return this;
}
StringValue sb = createStringBuilder(length);
for (int i = 0; i < length; i++) {
char ch = charAt(i);
if ('a' <= ch && ch <= 'z') {
sb.append(ch);
}
else if ('A' <= ch && ch <= 'Z') {
sb.append((char) (ch + 'a' - 'A'));
}
else if (isUnicode() && Character.isUpperCase(ch)) {
sb.append(Character.toLowerCase(ch));
}
}
return sb;
}
public StringValue toUpperCase()
{
return toUpperCase(Locale.ENGLISH);
}
/**
* Convert to upper case.
*/
public StringValue toUpperCase(Locale locale)
{
int length = length();
UnicodeBuilderValue string = new UnicodeBuilderValue(length);
char []buffer = string.getBuffer();
getChars(0, buffer, 0, length);
for (int i = 0; i < length; i++) {
char ch = buffer[i];
if ('a' <= ch && ch <= 'z')
buffer[i] = (char) (ch + 'A' - 'a');
else if (ch < 0x80) {
}
else if (Character.isLowerCase(ch))
buffer[i] = Character.toUpperCase(ch);
}
string.setLength(length);
return string;
}
/**
* Returns a byteArrayInputStream for the value.
* See TempBufferStringValue for how this can be overriden
*
* @return InputStream
*/
public InputStream toInputStream()
{
try {
//XXX: refactor so that env is passed in
return toInputStream(Env.getInstance().getRuntimeEncoding());
}
catch (UnsupportedEncodingException e) {
throw new QuercusRuntimeException(e);
}
//return new StringValueInputStream();
}
/**
* Returns a byte stream of chars.
* @param charset to encode chars to
*/
public InputStream toInputStream(String charset)
throws UnsupportedEncodingException
{
return new ByteArrayInputStream(toString().getBytes(charset));
}
public Reader toSimpleReader()
{
return new SimpleStringValueReader(this);
}
/**
* Returns a char stream.
* XXX: when decoding fails
*
* @param charset to decode bytes by
*/
public Reader toReader(String charset)
throws UnsupportedEncodingException
{
byte []bytes = toBytes();
return new InputStreamReader(new ByteArrayInputStream(bytes), charset);
}
public byte []toBytes()
{
throw new UnsupportedOperationException();
}
/**
* Converts to a unicode value.
*/
@Override
public StringValue toUnicode(Env env)
{
return this;
}
/**
* Decodes from charset and returns UnicodeValue.
*
* @param env
* @param charset
*/
public StringValue toUnicodeValue(Env env, String charset)
{
StringValue sb = new UnicodeBuilderValue();
Decoder decoder = Decoder.create(charset);
sb.append(decoder.decode(env, this));
return sb;
}
/**
* Decodes from charset and returns UnicodeValue.
*
* @param env
* @param charset
*/
public StringValue convertToUnicode(Env env, String charset)
{
Decoder decoder = Decoder.create(charset);
decoder.setAllowMalformedOut(true);
StringValue result = decoder.decodeUnicode(this);
return result;
}
/**
* Converts to a string builder
*/
@Override
public StringValue toStringBuilder(Env env)
{
return createStringBuilder().append(this);
}
/**
* Return true if the array value is set
*/
public boolean isset(Value indexV)
{
int index = indexV.toInt();
int len = length();
return 0 <= index && index < len;
}
/**
* Writes to a stream
*/
public void writeTo(OutputStream os)
{
try {
int len = length();
for (int i = 0; i < len; i++)
os.write(charAt(i));
} catch (IOException e) {
throw new QuercusModuleException(e);
}
}
/**
* Returns an OutputStream.
*/
public OutputStream getOutputStream()
{
throw new UnsupportedOperationException();
}
/**
* Calculates CRC32 value.
*/
public long getCrc32Value()
{
CRC32 crc = new CRC32();
int length = length();
for (int i = 0; i < length; i++) {
crc.update((byte) charAt(i));
}
return crc.getValue() & 0xffffffff;
}
//
// ByteAppendable methods
//
public void write(int value)
{
throw new UnsupportedOperationException(getClass().getName());
}
/**
* Appends buffer to the ByteAppendable.
*/
public void write(byte[] buffer, int offset, int len)
{
throw new UnsupportedOperationException(getClass().getName());
}
//
// java.lang.Object methods
//
/**
* Returns the hash code.
*/
public int hashCode()
{
int hash = 37;
int length = length();
for (int i = 0; i < length; i++) {
hash = 65521 * hash + charAt(i);
}
return hash;
}
/**
* Returns the case-insensitive hash code
*/
public int hashCodeCaseInsensitive()
{
int hash = 37;
int length = length();
for (int i = length - 1; i >= 0; i--) {
int ch = charAt(i);
if ('A' <= ch && ch <= 'Z')
ch = ch + 'a' - 'A';
hash = 65521 * hash + ch;
}
return hash;
}
/**
* Test for equality
*/
@Override
public boolean equals(Object o)
{
if (this == o) {
return true;
}
else if (! (o instanceof StringValue)) {
return false;
}
StringValue s = (StringValue) o;
//if (s.isUnicode() != isUnicode())
// return false;
int aLength = length();
int bLength = s.length();
if (aLength != bLength) {
return false;
}
for (int i = aLength - 1; i >= 0; i--) {
if (charAt(i) != s.charAt(i)) {
return false;
}
}
return true;
}
/**
* Test for equality
*/
public boolean equalsIgnoreCase(Object o)
{
if (this == o) {
return true;
}
else if (! (o instanceof StringValue)) {
return false;
}
StringValue s = (StringValue) o;
if (s.isUnicode() != isUnicode()) {
return false;
}
int aLength = length();
int bLength = s.length();
if (aLength != bLength)
return false;
for (int i = aLength - 1; i >= 0; i--) {
char chA = charAt(i);
char chB = s.charAt(i);
chA = Character.toLowerCase(chA);
chB = Character.toLowerCase(chB);
if (chA != chB) {
return false;
}
}
return true;
}
public boolean equalsString(CharSequence s)
{
if (this == s) {
return true;
}
int lenA = length();
int lenB = s.length();
if (lenA != lenB) {
return false;
}
for (int i = 0; i < lenA; i++) {
char chA = charAt(i);
char chB = s.charAt(i);
if (chA != chB) {
return false;
}
}
return true;
}
public boolean equalsStringIgnoreCase(CharSequence s)
{
if (this == s) {
return true;
}
int lenA = length();
int lenB = s.length();
if (lenA != lenB) {
return false;
}
for (int i = 0; i < lenA; i++) {
char chA = charAt(i);
char chB = s.charAt(i);
if (chA == chB) {
}
else {
if ('A' <= chA && chA <= 'Z')
chA += 'a' - 'A';
if ('A' <= chB && chB <= 'Z')
chB += 'a' - 'A';
if (chA != chB)
return false;
}
}
return true;
}
//
// Java generator code
//
/**
* Generates code to recreate the expression.
*
* @param out the writer to the Java source code.
*/
@Override
public void generate(PrintWriter out)
throws IOException
{
// max JVM constant string length
int maxSublen = 0xFFFE;
int len = length();
String className = getClass().getSimpleName();
if (len == 1) {
out.print(className + ".create('");
printJavaChar(out, charAt(0));
out.print("')");
}
else if (len < maxSublen) {
out.print("new " + className + "(\"");
printJavaString(out, this);
out.print("\")");
}
else {
out.print("((" + className + ") (new " + className + "(\"");
// php/313u
for (int i = 0; i < len; i += maxSublen) {
if (i != 0)
out.print("\").append(\"");
printJavaString(out, substring(i, Math.min(i + maxSublen, len)));
}
out.print("\")))");
}
}
@Override
abstract public String toDebugString();
@Override
abstract public void varDumpImpl(Env env,
WriteStream out,
int depth,
IdentityHashMap valueSet)
throws IOException;
class StringValueInputStream extends java.io.InputStream {
private final int _length;
private int _index;
StringValueInputStream()
{
_length = length();
}
/**
* Reads the next byte.
*/
public int read()
{
if (_index < _length)
return charAt(_index++);
else
return -1;
}
/**
* Reads into a buffer.
*/
public int read(byte []buffer, int offset, int length)
{
int sublen = _length - _index;
if (length < sublen)
sublen = length;
if (sublen <= 0)
return -1;
int index = _index;
for (int i = 0; i < sublen; i++)
buffer[offset + i] = (byte) charAt(index + i);
_index += sublen;
return sublen;
}
}
/**
* Interns the string.
*/
public StringValue intern()
{
StringValue value = _internMap.get(this);
if (value == null) {
_internMap.put(this, this);
value = this;
}
return value;
}
static class SimpleStringValueReader extends Reader
{
StringValue _str;
int _index;
int _length;
SimpleStringValueReader(StringValue s)
{
_str = s;
_length = s.length();
}
public int read()
{
if (_index >= _length)
return -1;
else
return _str.charAt(_index++);
}
public int read(char []buf, int off, int len)
{
if (_index >= _length)
return -1;
int i = 0;
len = Math.min(_length - _index, len);
for (; i < len; i++) {
buf[off + i] = _str.charAt(i + _index++);
}
return i;
}
public void close()
throws IOException
{
}
}
}
