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RubyRegexp.java
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RubyRegexp.java
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/***** BEGIN LICENSE BLOCK *****
* Version: EPL 1.0/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Eclipse Public
* License Version 1.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.eclipse.org/legal/epl-v10.html
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* Copyright (C) 2001 Alan Moore <alan_moore@gmx.net>
* Copyright (C) 2001-2002 Benoit Cerrina <b.cerrina@wanadoo.fr>
* Copyright (C) 2001-2004 Jan Arne Petersen <jpetersen@uni-bonn.de>
* Copyright (C) 2002-2004 Anders Bengtsson <ndrsbngtssn@yahoo.se>
* Copyright (C) 2004-2005 Thomas E Enebo <enebo@acm.org>
* Copyright (C) 2004 Stefan Matthias Aust <sma@3plus4.de>
* Copyright (C) 2005 David Corbin <dcorbin@users.sourceforge.net>
* Copyright (C) 2006 Nick Sieger <nicksieger@gmail.com>
* Copyright (C) 2006 Miguel Covarrubias <mlcovarrubias@gmail.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the EPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the EPL, the GPL or the LGPL.
***** END LICENSE BLOCK *****/
package org.jruby;
import static org.jruby.anno.FrameField.BACKREF;
import static org.jruby.anno.FrameField.LASTLINE;
import org.jcodings.Encoding;
import org.jcodings.specific.ASCIIEncoding;
import org.jcodings.specific.USASCIIEncoding;
import org.jcodings.specific.UTF8Encoding;
import org.joni.Matcher;
import org.joni.NameEntry;
import org.joni.Option;
import org.joni.Regex;
import org.joni.Region;
import org.joni.Syntax;
import org.joni.exception.JOniException;
import org.jruby.anno.JRubyClass;
import org.jruby.anno.JRubyMethod;
import org.jruby.common.IRubyWarnings.ID;
import org.jruby.exceptions.RaiseException;
import org.jruby.parser.ReOptions;
import org.jruby.runtime.Arity;
import org.jruby.runtime.Block;
import org.jruby.runtime.ClassIndex;
import org.jruby.runtime.DynamicScope;
import org.jruby.runtime.ObjectAllocator;
import org.jruby.runtime.ThreadContext;
import org.jruby.runtime.Visibility;
import org.jruby.runtime.builtin.IRubyObject;
import org.jruby.runtime.encoding.EncodingCapable;
import org.jruby.runtime.encoding.MarshalEncoding;
import org.jruby.runtime.marshal.MarshalStream;
import org.jruby.runtime.marshal.UnmarshalStream;
import org.jruby.util.ByteList;
import org.jruby.util.KCode;
import org.jruby.util.Pack;
import org.jruby.util.RegexpOptions;
import org.jruby.util.Sprintf;
import org.jruby.util.StringSupport;
import org.jruby.util.TypeConverter;
import org.jruby.util.collections.WeakValuedMap;
import java.util.Iterator;
@JRubyClass(name="Regexp")
public class RubyRegexp extends RubyObject implements ReOptions, EncodingCapable, MarshalEncoding {
private Regex pattern;
private ByteList str = ByteList.EMPTY_BYTELIST;
private RegexpOptions options;
public static final int ARG_ENCODING_FIXED = 16;
public static final int ARG_ENCODING_NONE = 32;
public void setLiteral() {
options.setLiteral(true);
}
public void clearLiteral() {
options.setLiteral(false);
}
public boolean isLiteral() {
return options.isLiteral();
}
public boolean isKCodeDefault() {
return options.isKcodeDefault();
}
public void setEncodingNone() {
options.setEncodingNone(true);
}
public void clearEncodingNone() {
options.setEncodingNone(false);
}
public boolean isEncodingNone() {
return options.isEncodingNone();
}
public KCode getKCode() {
return options.getKCode();
}
@Override
public Encoding getEncoding() {
return pattern.getEncoding();
}
@Override
public void setEncoding(Encoding encoding) {
// FIXME: Which encoding should be changed here?
// FIXME: transcode?
}
@Override
public boolean shouldMarshalEncoding() {
return getEncoding() != ASCIIEncoding.INSTANCE;
}
@Override
public Encoding getMarshalEncoding() {
return getEncoding();
}
// FIXME: Maybe these should not be static?
private static final WeakValuedMap<ByteList, Regex> patternCache = new WeakValuedMap();
private static final WeakValuedMap<ByteList, Regex> quotedPatternCache = new WeakValuedMap();
private static final WeakValuedMap<ByteList, Regex> preprocessedPatternCache = new WeakValuedMap();
private static Regex makeRegexp(Ruby runtime, ByteList bytes, RegexpOptions options, Encoding enc) {
try {
int p = bytes.getBegin();
return new Regex(bytes.getUnsafeBytes(), p, p + bytes.getRealSize(), options.toJoniOptions(), enc, Syntax.DEFAULT, runtime.getWarnings());
} catch (Exception e) {
if (runtime.is1_9()) {
raiseRegexpError19(runtime, bytes, enc, options, e.getMessage());
} else {
raiseRegexpError(runtime, bytes, enc, options, e.getMessage());
}
return null; // not reached
}
}
static Regex getRegexpFromCache(Ruby runtime, ByteList bytes, Encoding enc, RegexpOptions options) {
Regex regex = patternCache.get(bytes);
if (regex != null && regex.getEncoding() == enc && regex.getOptions() == options.toJoniOptions()) return regex;
regex = makeRegexp(runtime, bytes, options, enc);
regex.setUserObject(bytes);
patternCache.put(bytes, regex);
return regex;
}
static Regex getQuotedRegexpFromCache(Ruby runtime, ByteList bytes, Encoding enc, RegexpOptions options) {
Regex regex = quotedPatternCache.get(bytes);
if (regex != null && regex.getEncoding() == enc && regex.getOptions() == options.toJoniOptions()) return regex;
ByteList quoted = quote(bytes, enc);
regex = makeRegexp(runtime, quoted, options, enc);
regex.setUserObject(quoted);
quotedPatternCache.put(bytes, regex);
return regex;
}
static Regex getQuotedRegexpFromCache19(Ruby runtime, ByteList bytes, RegexpOptions options, boolean asciiOnly) {
Regex regex = quotedPatternCache.get(bytes);
Encoding enc = asciiOnly ? USASCIIEncoding.INSTANCE : bytes.getEncoding();
if (regex != null && regex.getEncoding() == enc && regex.getOptions() == options.toJoniOptions()) return regex;
ByteList quoted = quote19(bytes, asciiOnly);
regex = makeRegexp(runtime, quoted, options, quoted.getEncoding());
regex.setUserObject(quoted);
quotedPatternCache.put(bytes, regex);
return regex;
}
private static Regex getPreprocessedRegexpFromCache(Ruby runtime, ByteList bytes, Encoding enc, RegexpOptions options, ErrorMode mode) {
Regex regex = preprocessedPatternCache.get(bytes);
if (regex != null && regex.getEncoding() == enc && regex.getOptions() == options.toJoniOptions()) return regex;
ByteList preprocessed = preprocess(runtime, bytes, enc, new Encoding[]{null}, ErrorMode.RAISE);
regex = makeRegexp(runtime, preprocessed, options, enc);
regex.setUserObject(preprocessed);
preprocessedPatternCache.put(bytes, regex);
return regex;
}
public static RubyClass createRegexpClass(Ruby runtime) {
RubyClass regexpClass = runtime.defineClass("Regexp", runtime.getObject(), REGEXP_ALLOCATOR);
runtime.setRegexp(regexpClass);
regexpClass.index = ClassIndex.REGEXP;
regexpClass.setReifiedClass(RubyRegexp.class);
regexpClass.kindOf = new RubyModule.JavaClassKindOf(RubyRegexp.class);
regexpClass.defineConstant("IGNORECASE", runtime.newFixnum(RE_OPTION_IGNORECASE));
regexpClass.defineConstant("EXTENDED", runtime.newFixnum(RE_OPTION_EXTENDED));
regexpClass.defineConstant("MULTILINE", runtime.newFixnum(RE_OPTION_MULTILINE));
if (runtime.is1_9()) {
regexpClass.defineConstant("FIXEDENCODING", runtime.newFixnum(ARG_ENCODING_FIXED));
regexpClass.defineConstant("NOENCODING", runtime.newFixnum(ARG_ENCODING_NONE));
}
regexpClass.defineAnnotatedMethods(RubyRegexp.class);
regexpClass.getSingletonClass().defineAlias("compile", "new");
return regexpClass;
}
private static ObjectAllocator REGEXP_ALLOCATOR = new ObjectAllocator() {
@Override
public IRubyObject allocate(Ruby runtime, RubyClass klass) {
return new RubyRegexp(runtime, klass);
}
};
public static int matcherSearch(Ruby runtime, Matcher matcher, int start, int range, int option) {
try {
RubyThread thread = runtime.getCurrentContext().getThread();
SearchMatchTask task = new SearchMatchTask(thread, matcher, start, range, option, false);
thread.executeBlockingTask(task);
return task.retval;
} catch (InterruptedException e) {
throw runtime.newInterruptedRegexpError("Regexp Interrupted");
}
}
public static int matcherMatch(Ruby runtime, Matcher matcher, int start, int range, int option) {
try {
RubyThread thread = runtime.getCurrentContext().getThread();
SearchMatchTask task = new SearchMatchTask(thread, matcher, start, range, option, true);
thread.executeBlockingTask(task);
return task.retval;
} catch (InterruptedException e) {
throw runtime.newInterruptedRegexpError("Regexp Interrupted");
}
}
private static class SearchMatchTask implements RubyThread.BlockingTask {
int retval;
final RubyThread thread;
final Matcher matcher;
final int start;
final int range;
final int option;
final boolean match;
SearchMatchTask(RubyThread thread, Matcher matcher, int start, int range, int option, boolean match) {
this.thread = thread;
this.matcher = matcher;
this.start = start;
this.range = range;
this.option = option;
this.match = match;
}
@Override
public void run() throws InterruptedException {
retval = match ?
matcher.matchInterruptible(start, range, option) :
matcher.searchInterruptible(start, range, option);
}
@Override
public void wakeup() {
thread.getNativeThread().interrupt();
}
}
@Override
public int getNativeTypeIndex() {
return ClassIndex.REGEXP;
}
/** used by allocator
*/
private RubyRegexp(Ruby runtime, RubyClass klass) {
super(runtime, klass);
this.options = new RegexpOptions();
}
/** default constructor
*/
private RubyRegexp(Ruby runtime) {
super(runtime, runtime.getRegexp());
this.options = new RegexpOptions();
}
private RubyRegexp(Ruby runtime, ByteList str) {
this(runtime);
str.getClass();
this.str = str;
this.pattern = getRegexpFromCache(runtime, str, getEncoding(runtime, str), RegexpOptions.NULL_OPTIONS);
}
private RubyRegexp(Ruby runtime, ByteList str, RegexpOptions options) {
this(runtime);
str.getClass();
if (runtime.is1_9()) {
initializeCommon19(str, str.getEncoding(), options);
} else {
this.options = options;
this.str = str;
this.pattern = getRegexpFromCache(runtime, str, getEncoding(runtime, str), options);
}
}
private Encoding getEncoding(Ruby runtime, ByteList str) {
if (runtime.is1_9()) return str.getEncoding();
// Whatever $KCODE is we should use
if (options.isKcodeDefault()) return runtime.getKCode().getEncoding();
return options.getKCode().getEncoding();
}
// used only by the compiler/interpreter (will set the literal flag)
public static RubyRegexp newRegexp(Ruby runtime, String pattern, RegexpOptions options) {
return newRegexp(runtime, ByteList.create(pattern), options);
}
// used only by the compiler/interpreter (will set the literal flag)
public static RubyRegexp newRegexp(Ruby runtime, ByteList pattern, RegexpOptions options) {
try {
return new RubyRegexp(runtime, pattern, (RegexpOptions)options.clone());
} catch (RaiseException re) {
throw runtime.newSyntaxError(re.getMessage());
}
}
// used only by the compiler/interpreter (will set the literal flag)
public static RubyRegexp newDRegexp(Ruby runtime, RubyString pattern, RegexpOptions options) {
try {
return new RubyRegexp(runtime, pattern.getByteList(), (RegexpOptions)options.clone());
} catch (RaiseException re) {
throw runtime.newRegexpError(re.getMessage());
}
}
// used only by the compiler/interpreter (will set the literal flag)
public static RubyRegexp newDRegexp(Ruby runtime, RubyString pattern, int joniOptions) {
try {
RegexpOptions options = RegexpOptions.fromJoniOptions(joniOptions);
return new RubyRegexp(runtime, pattern.getByteList(), options);
} catch (RaiseException re) {
throw runtime.newRegexpError(re.getMessage());
}
}
// used only by the compiler/interpreter (will set the literal flag)
public static RubyRegexp newDRegexpEmbedded(Ruby runtime, RubyString pattern, int embeddedOptions) {
try {
RegexpOptions options = RegexpOptions.fromEmbeddedOptions(embeddedOptions);
// FIXME: Massive hack (fix in DRegexpNode too for interpreter)
if (pattern.getEncoding() == USASCIIEncoding.INSTANCE) {
pattern.setEncoding(ASCIIEncoding.INSTANCE);
}
return new RubyRegexp(runtime, pattern.getByteList(), options);
} catch (RaiseException re) {
throw runtime.newRegexpError(re.getMessage());
}
}
public static RubyRegexp newDRegexpEmbedded19(Ruby runtime, IRubyObject[] strings, int embeddedOptions) {
try {
RegexpOptions options = RegexpOptions.fromEmbeddedOptions(embeddedOptions);
RubyString pattern = preprocessDRegexp(runtime, strings, options);
return new RubyRegexp(runtime, pattern.getByteList(), options);
} catch (RaiseException re) {
throw runtime.newRegexpError(re.getMessage());
}
}
public static RubyRegexp newRegexp(Ruby runtime, ByteList pattern) {
return new RubyRegexp(runtime, pattern);
}
static RubyRegexp newRegexp(Ruby runtime, ByteList str, Regex pattern) {
RubyRegexp regexp = new RubyRegexp(runtime);
str.getClass();
regexp.str = str;
regexp.options = RegexpOptions.fromJoniOptions(pattern.getOptions());
regexp.pattern = pattern;
return regexp;
}
// internal usage (Complex/Rational)
static RubyRegexp newDummyRegexp(Ruby runtime, Regex regex) {
RubyRegexp regexp = new RubyRegexp(runtime);
regexp.pattern = regex;
regexp.str = ByteList.EMPTY_BYTELIST;
regexp.options.setFixed(true);
return regexp;
}
/** rb_reg_options
*/
public RegexpOptions getOptions() {
check();
return options;
}
public final Regex getPattern() {
check();
return pattern;
}
private static void encodingMatchError(Ruby runtime, Regex pattern, Encoding strEnc) {
throw runtime.newEncodingCompatibilityError("incompatible encoding regexp match (" +
pattern.getEncoding() + " regexp with " + strEnc + " string)");
}
private Encoding checkEncoding(RubyString str, boolean warn) {
if (str.scanForCodeRange() == StringSupport.CR_BROKEN) {
throw getRuntime().newArgumentError("invalid byte sequence in " + str.getEncoding());
}
check();
Encoding enc = str.getEncoding();
if (!enc.isAsciiCompatible()) {
if (enc != pattern.getEncoding()) encodingMatchError(getRuntime(), pattern, enc);
} else if (options.isFixed()) {
if (enc != pattern.getEncoding() &&
(!pattern.getEncoding().isAsciiCompatible() ||
str.scanForCodeRange() != StringSupport.CR_7BIT)) encodingMatchError(getRuntime(), pattern, enc);
enc = pattern.getEncoding();
}
if (warn && isEncodingNone() && enc != ASCIIEncoding.INSTANCE && str.scanForCodeRange() != StringSupport.CR_7BIT) {
getRuntime().getWarnings().warn(ID.REGEXP_MATCH_AGAINST_STRING, "regexp match /.../n against to " + enc + " string");
}
return enc;
}
public final Regex preparePattern(RubyString str) {
check();
Encoding enc = checkEncoding(str, true);
if (enc == pattern.getEncoding()) return pattern;
return getPreprocessedRegexpFromCache(getRuntime(), this.str, enc, options, ErrorMode.PREPROCESS);
}
static Regex preparePattern(Ruby runtime, Regex pattern, RubyString str) {
if (str.scanForCodeRange() == StringSupport.CR_BROKEN) {
throw runtime.newArgumentError("invalid byte sequence in " + str.getEncoding());
}
Encoding enc = str.getEncoding();
if (!enc.isAsciiCompatible()) {
if (enc != pattern.getEncoding()) encodingMatchError(runtime, pattern, enc);
}
// TODO: check for isKCodeDefault() somehow
// if (warn && isEncodingNone() && enc != ASCIIEncoding.INSTANCE && str.scanForCodeRange() != StringSupport.CR_7BIT) {
// getRuntime().getWarnings().warn(ID.REGEXP_MATCH_AGAINST_STRING, "regexp match /.../n against to " + enc + " string");
// }
if (enc == pattern.getEncoding()) return pattern;
return getPreprocessedRegexpFromCache(runtime, (ByteList)pattern.getUserObject(), enc, RegexpOptions.fromJoniOptions(pattern.getOptions()), ErrorMode.PREPROCESS);
}
private static enum ErrorMode {RAISE, PREPROCESS, DESC}
private static int raisePreprocessError(Ruby runtime, ByteList str, String err, ErrorMode mode) {
switch (mode) {
case RAISE:
raiseRegexpError19(runtime, str, str.getEncoding(), RegexpOptions.NULL_OPTIONS, err);
case PREPROCESS:
throw runtime.newArgumentError("regexp preprocess failed: " + err);
case DESC:
// silent ?
}
return 0;
}
private static int readEscapedByte(Ruby runtime, byte[]to, int toP, byte[]bytes, int p, int end, ByteList str, ErrorMode mode) {
if (p == end || bytes[p++] != (byte)'\\') raisePreprocessError(runtime, str, "too short escaped multibyte character", mode);
boolean metaPrefix = false, ctrlPrefix = false;
int code = 0;
while (true) {
if (p == end) raisePreprocessError(runtime, str, "too short escape sequence", mode);
switch (bytes[p++]) {
case '\\': code = '\\'; break;
case 'n': code = '\n'; break;
case 't': code = '\t'; break;
case 'r': code = '\r'; break;
case 'f': code = '\f'; break;
case 'v': code = '\013'; break;
case 'a': code = '\007'; break;
case 'e': code = '\033'; break;
/* \OOO */
case '0': case '1': case '2': case '3':
case '4': case '5': case '6': case '7':
p--;
int olen = end < p + 3 ? end - p : 3;
code = StringSupport.scanOct(bytes, p, olen);
p += StringSupport.octLength(bytes, p, olen);
break;
case 'x': /* \xHH */
int hlen = end < p + 2 ? end - p : 2;
code = StringSupport.scanHex(bytes, p, hlen);
int len = StringSupport.hexLength(bytes, p, hlen);
if (len < 1) raisePreprocessError(runtime, str, "invalid hex escape", mode);
p += len;
break;
case 'M': /* \M-X, \M-\C-X, \M-\cX */
if (metaPrefix) raisePreprocessError(runtime, str, "duplicate meta escape", mode);
metaPrefix = true;
if (p + 1 < end && bytes[p++] == (byte)'-' && (bytes[p] & 0x80) == 0) {
if (bytes[p] == (byte)'\\') {
p++;
continue;
} else {
code = bytes[p++] & 0xff;
break;
}
}
raisePreprocessError(runtime, str, "too short meta escape", mode);
case 'C': /* \C-X, \C-\M-X */
if (p == end || bytes[p++] != (byte)'-') raisePreprocessError(runtime, str, "too short control escape", mode);
case 'c': /* \cX, \c\M-X */
if (ctrlPrefix) raisePreprocessError(runtime, str, "duplicate control escape", mode);
ctrlPrefix = true;
if (p < end && (bytes[p] & 0x80) == 0) {
if (bytes[p] == (byte)'\\') {
p++;
continue;
} else {
code = bytes[p++] & 0xff;
break;
}
}
raisePreprocessError(runtime, str, "too short control escape", mode);
default:
raisePreprocessError(runtime, str, "unexpected escape sequence", mode);
} // switch
if (code < 0 || code > 0xff) raisePreprocessError(runtime, str, "invalid escape code", mode);
if (ctrlPrefix) code &= 0x1f;
if (metaPrefix) code |= 0x80;
to[toP] = (byte)code;
return p;
} // while
}
/**
* Unescape escaped non-ascii character at start position, appending all
* to the given bytelist if provided.
*
* @param runtime current runtime
* @param to output bytelist; if null, no appending will be done
* @param bytes incoming bytes
* @param p start position
* @param end end position
* @param enc bytes' encoding
* @param encp out param for fixed encoding
* @param str original bytes wrapper
* @param mode error mode
* @return new position after performing unescaping
*/
// MRI: unescape_escapted_nonascii
private static int unescapeEscapedNonAscii(Ruby runtime, ByteList to, byte[]bytes, int p, int end, Encoding enc, Encoding[]encp, ByteList str, ErrorMode mode) {
byte[]chBuf = new byte[enc.maxLength()];
int chLen = 0;
p = readEscapedByte(runtime, chBuf, chLen++, bytes, p, end, str, mode);
while (chLen < enc.maxLength() && StringSupport.preciseLength(enc, chBuf, 0, chLen) < -1) { // MBCLEN_NEEDMORE_P
p = readEscapedByte(runtime, chBuf, chLen++, bytes, p, end, str, mode);
}
int cl = StringSupport.preciseLength(enc, chBuf, 0, chLen);
if (cl == -1) {
raisePreprocessError(runtime, str, "invalid multibyte escape", mode); // MBCLEN_INVALID_P
}
if (chLen > 1 || (chBuf[0] & 0x80) != 0) {
if (to != null) to.append(chBuf, 0, chLen);
if (encp[0] == null) {
encp[0] = enc;
} else if (encp[0] != enc) {
raisePreprocessError(runtime, str, "escaped non ASCII character in UTF-8 regexp", mode);
}
} else {
if (to != null) Sprintf.sprintf(runtime, to, "\\x%02X", chBuf[0] & 0xff);
}
return p;
}
private static void checkUnicodeRange(Ruby runtime, int code, ByteList str, ErrorMode mode) {
// Unicode is can be only 21 bits long, int is enough
if ((0xd800 <= code && code <= 0xdfff) /* Surrogates */ || 0x10ffff < code) {
raisePreprocessError(runtime, str, "invalid Unicode range", mode);
}
}
/**
* Append the given utf8 characters to the buffer, if given, checking for
* errors along the way.
*
* @param runtime current runtime
* @param to output buffer; if null, no appending will be done
* @param code utf8 character code
* @param enc output param for new encoding
* @param str original wrapper of source bytes
* @param mode error mode
*/
private static void appendUtf8(Ruby runtime, ByteList to, int code, Encoding[] enc, ByteList str, ErrorMode mode) {
checkUnicodeRange(runtime, code, str, mode);
if (code < 0x80) {
if (to != null) Sprintf.sprintf(runtime, to, "\\x%02X", code);
} else {
if (to != null) {
to.ensure(to.getRealSize() + 6);
to.setRealSize(to.getRealSize() + Pack.utf8Decode(runtime, to.getUnsafeBytes(), to.getBegin() + to.getRealSize(), code));
}
if (enc[0] == null) {
enc[0] = UTF8Encoding.INSTANCE;
} else if (!(enc[0] instanceof UTF8Encoding)) { // do not load the class if not used
raisePreprocessError(runtime, str, "UTF-8 character in non UTF-8 regexp", mode);
}
}
}
/**
* Unescape unicode characters at given offset, appending to the given
* out buffer if provided.
*
* @param runtime current runtime
* @param to output buffer; if null, no appending will be done
* @param bytes input bytes
* @param p start position
* @param end end position
* @param encp out param for fixed encoding
* @param str original bytes wrapper
* @param mode error mode
* @return new position after unescaping
*/
private static int unescapeUnicodeList(Ruby runtime, ByteList to, byte[]bytes, int p, int end, Encoding[]encp, ByteList str, ErrorMode mode) {
while (p < end && ASCIIEncoding.INSTANCE.isSpace(bytes[p] & 0xff)) p++;
boolean hasUnicode = false;
while (true) {
int code = StringSupport.scanHex(bytes, p, end - p);
int len = StringSupport.hexLength(bytes, p, end - p);
if (len == 0) break;
if (len > 6) raisePreprocessError(runtime, str, "invalid Unicode range", mode);
p += len;
if (to != null) appendUtf8(runtime, to, code, encp, str, mode);
hasUnicode = true;
while (p < end && ASCIIEncoding.INSTANCE.isSpace(bytes[p] & 0xff)) p++;
}
if (!hasUnicode) raisePreprocessError(runtime, str, "invalid Unicode list", mode);
return p;
}
/**
* Unescape unicode BMP char at given offset, appending to the specified
* buffer if non-null.
*
* @param runtime current runtime
* @param to output buffer; if null, no appending will be done
* @param bytes input bytes
* @param p start position
* @param end end position
* @param encp out param for fixed encoding
* @param str original bytes wrapper
* @param mode error mode
* @return new position after unescaping
*/
private static int unescapeUnicodeBmp(Ruby runtime, ByteList to, byte[] bytes, int p, int end, Encoding[] encp, ByteList str, ErrorMode mode) {
if (p + 4 > end) raisePreprocessError(runtime, str, "invalid Unicode escape", mode);
int code = StringSupport.scanHex(bytes, p, 4);
int len = StringSupport.hexLength(bytes, p, 4);
if (len != 4) raisePreprocessError(runtime, str, "invalid Unicode escape", mode);
appendUtf8(runtime, to, code, encp, str, mode);
return p + 4;
}
/**
* Unescape non-ascii elements in the given string, appending the results
* to the given bytelist if provided.
*
* @param runtime current runtime
* @param to output bytelist; if null, no appending will be done
* @param bytes the bytes to unescape
* @param p starting position
* @param end ending position
* @param enc bytes' encoding
* @param encp out param for fixed encoding
* @param str original wrapper for the bytes
* @param mode error mode
* @return whether any propery elements were encountered while walking
*/
private static boolean unescapeNonAscii(Ruby runtime, ByteList to, byte[]bytes, int p, int end, Encoding enc, Encoding[]encp, ByteList str, ErrorMode mode) {
boolean hasProperty = false;
while (p < end) {
int cl = StringSupport.preciseLength(enc, bytes, p, end);
if (cl <= 0) raisePreprocessError(runtime, str, "invalid multibyte character", mode);
if (cl > 1 || (bytes[p] & 0x80) != 0) {
if (to != null) to.append(bytes, p, cl);
p += cl;
if (encp[0] == null) {
encp[0] = enc;
} else if (encp[0] != enc) {
raisePreprocessError(runtime, str, "non ASCII character in UTF-8 regexp", mode);
}
continue;
}
int c;
switch (c = bytes[p++] & 0xff) {
case '\\':
if (p == end) raisePreprocessError(runtime, str, "too short escape sequence", mode);
switch (c = bytes[p++] & 0xff) {
case '1': case '2': case '3':
case '4': case '5': case '6': case '7': /* \O, \OO, \OOO or backref */
if (StringSupport.scanOct(bytes, p - 1, end - (p - 1)) <= 0177) {
if (to != null) to.append('\\').append(c);
break;
}
case '0': /* \0, \0O, \0OO */
case 'x': /* \xHH */
case 'c': /* \cX, \c\M-X */
case 'C': /* \C-X, \C-\M-X */
case 'M': /* \M-X, \M-\C-X, \M-\cX */
p = unescapeEscapedNonAscii(runtime, to, bytes, p - 2, end, enc, encp, str, mode);
break;
case 'u':
if (p == end) raisePreprocessError(runtime, str, "too short escape sequence", mode);
if (bytes[p] == (byte)'{') { /* \\u{H HH HHH HHHH HHHHH HHHHHH ...} */
p++;
p = unescapeUnicodeList(runtime, to, bytes, p, end, encp, str, mode);
if (p == end || bytes[p++] != (byte)'}') raisePreprocessError(runtime, str, "invalid Unicode list", mode);
} else { /* \\uHHHH */
p = unescapeUnicodeBmp(runtime, to, bytes, p, end, encp, str, mode);
}
break;
case 'p': /* \p{Hiragana} */
if (encp[0] == null) hasProperty = true;
if (to != null) to.append('\\').append(c);
break;
default:
if (to != null) to.append('\\').append(c);
break;
} // inner switch
break;
default:
if (to != null) to.append(c);
} // switch
} // while
return hasProperty;
}
/**
* Preprocess the given string for use in regexp, raising errors for encoding
* incompatibilities that arise.
*
* This version produces a new unescaped version of the string based on
* fixes performed while walking.
*
* @param runtime current runtime
* @param str string to preprocess
* @param enc string's encoding
* @param fixedEnc new encoding after fixing
* @param mode mode of errors
* @return a new unescaped string
*/
private static ByteList preprocess(Ruby runtime, ByteList str, Encoding enc, Encoding[]fixedEnc, ErrorMode mode) {
ByteList to = new ByteList(str.getRealSize());
if (enc.isAsciiCompatible()) {
fixedEnc[0] = null;
} else {
fixedEnc[0] = enc;
to.setEncoding(enc);
}
boolean hasProperty = unescapeNonAscii(runtime, to, str.getUnsafeBytes(), str.getBegin(), str.getBegin() + str.getRealSize(), enc, fixedEnc, str, mode);
if (hasProperty && fixedEnc[0] == null) fixedEnc[0] = enc;
if (fixedEnc[0] != null) to.setEncoding(fixedEnc[0]);
return to;
}
/**
* Preprocess the given string for use in regexp, raising errors for encoding
* incompatibilities that arise.
*
* This version does not produce a new, unescaped version of the bytelist,
* and simply does the string-walking portion of the logic.
*
* @param runtime current runtime
* @param str string to preprocess
* @param enc string's encoding
* @param fixedEnc new encoding after fixing
* @param mode mode of errors
*/
private static void preprocessLight(Ruby runtime, ByteList str, Encoding enc, Encoding[]fixedEnc, ErrorMode mode) {
if (enc.isAsciiCompatible()) {
fixedEnc[0] = null;
} else {
fixedEnc[0] = enc;
}
boolean hasProperty = unescapeNonAscii(runtime, null, str.getUnsafeBytes(), str.getBegin(), str.getBegin() + str.getRealSize(), enc, fixedEnc, str, mode);
if (hasProperty && fixedEnc[0] == null) fixedEnc[0] = enc;
}
public static void preprocessCheck(Ruby runtime, ByteList bytes) {
preprocess(runtime, bytes, bytes.getEncoding(), new Encoding[]{null}, ErrorMode.RAISE);
}
// rb_reg_preprocess_dregexp
public static RubyString preprocessDRegexp(Ruby runtime, IRubyObject[] strings, RegexpOptions options) {
RubyString string = null;
Encoding regexpEnc = null;
Encoding[] fixedEnc = new Encoding[1];
for (int i = 0; i < strings.length; i++) {
RubyString str = strings[i].convertToString();
Encoding strEnc = str.getEncoding();
if (options.isEncodingNone() && strEnc != ASCIIEncoding.INSTANCE) {
if (str.scanForCodeRange() != StringSupport.CR_7BIT) {
throw runtime.newRegexpError("/.../n has a non escaped non ASCII character in non ASCII-8BIT script");
}
strEnc = ASCIIEncoding.INSTANCE;
}
// This used to call preprocess, but the resulting bytelist was not
// used. Since the preprocessing error-checking can be done without
// creating a new bytelist, I added a "light" path.
RubyRegexp.preprocessLight(runtime, str.getByteList(), strEnc, fixedEnc, RubyRegexp.ErrorMode.PREPROCESS);
if (fixedEnc[0] != null) {
if (regexpEnc != null && regexpEnc != fixedEnc[0]) {
throw runtime.newRegexpError("encoding mismatch in dynamic regexp: " + new String(regexpEnc.getName()) + " and " + new String(fixedEnc[0].getName()));
}
regexpEnc = fixedEnc[0];
}
if (string == null) {
string = (RubyString)str.dup();
} else {
string.append19(str);
}
}
if (regexpEnc != null) {
string.setEncoding(regexpEnc);
}
return string;
}
private void check() {
if (pattern == null) throw getRuntime().newTypeError("uninitialized Regexp");
}
@JRubyMethod(name = "try_convert", meta = true, compat = CompatVersion.RUBY1_9)
public static IRubyObject try_convert(ThreadContext context, IRubyObject recv, IRubyObject args) {
return TypeConverter.convertToTypeWithCheck(args, context.runtime.getRegexp(), "to_regexp");
}
/** rb_reg_s_quote
*
*/
@JRubyMethod(name = {"quote", "escape"}, required = 1, optional = 1, meta = true, compat = CompatVersion.RUBY1_8)
public static RubyString quote(ThreadContext context, IRubyObject recv, IRubyObject[] args) {
Ruby runtime = context.runtime;
final KCode code;
if (args.length == 1 || args[1].isNil()) {
code = runtime.getKCode();
} else {
code = KCode.create(runtime, args[1].toString());
}
RubyString src = args[0].convertToString();
RubyString dst = RubyString.newStringShared(runtime, quote(src.getByteList(), code.getEncoding()));
dst.infectBy(src);
return dst;
}
@JRubyMethod(name = {"quote", "escape"}, meta = true, compat = CompatVersion.RUBY1_9)
public static IRubyObject quote19(ThreadContext context, IRubyObject recv, IRubyObject arg) {
Ruby runtime = context.runtime;
RubyString str = operandCheck(runtime, arg);
return RubyString.newStringShared(runtime, quote19(str.getByteList(), str.isAsciiOnly()));
}
/** rb_reg_quote
*
*/
private static ByteList quote(ByteList bs, Encoding enc) {
int p = bs.getBegin();
int end = p + bs.getRealSize();
byte[]bytes = bs.getUnsafeBytes();
metaFound: do {
for(; p < end; p++) {
int c = bytes[p] & 0xff;
int cl = enc.length(bytes, p, end);
if (cl != 1) {
while (cl-- > 0 && p < end) p++;
p--;
continue;
}
switch (c) {
case '[': case ']': case '{': case '}':
case '(': case ')': case '|': case '-':
case '*': case '.': case '\\':
case '?': case '+': case '^': case '$':
case ' ': case '#':
case '\t': case '\f': case '\n': case '\r':
break metaFound;
}
}
return bs;
} while (false);
ByteList result = new ByteList(end * 2);
byte[]obytes = result.getUnsafeBytes();
int op = p - bs.getBegin();
System.arraycopy(bytes, bs.getBegin(), obytes, 0, op);
for(; p < end; p++) {
int c = bytes[p] & 0xff;
int cl = enc.length(bytes, p, end);
if (cl != 1) {
while (cl-- > 0 && p < end) obytes[op++] = bytes[p++];
p--;
continue;
}
switch (c) {
case '[': case ']': case '{': case '}':
case '(': case ')': case '|': case '-':
case '*': case '.': case '\\':
case '?': case '+': case '^': case '$':
case '#': obytes[op++] = '\\'; break;
case ' ': obytes[op++] = '\\'; obytes[op++] = ' '; continue;
case '\t':obytes[op++] = '\\'; obytes[op++] = 't'; continue;
case '\n':obytes[op++] = '\\'; obytes[op++] = 'n'; continue;
case '\r':obytes[op++] = '\\'; obytes[op++] = 'r'; continue;
case '\f':obytes[op++] = '\\'; obytes[op++] = 'f'; continue;
}
obytes[op++] = (byte)c;
}
result.setRealSize(op);
return result;
}
private static final int QUOTED_V = 11;
static ByteList quote19(ByteList bs, boolean asciiOnly) {
int p = bs.getBegin();
int end = p + bs.getRealSize();
byte[]bytes = bs.getUnsafeBytes();
Encoding enc = bs.getEncoding();
metaFound: do {
while (p < end) {
final int c;
final int cl;
if (enc.isAsciiCompatible()) {
cl = 1;
c = bytes[p] & 0xff;
} else {
cl = StringSupport.preciseLength(enc, bytes, p, end);
c = enc.mbcToCode(bytes, p, end);
}