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package com.oracle.truffle.regex;
import com.oracle.truffle.api.CompilerDirectives.TruffleBoundary;
import com.oracle.truffle.api.source.Source;
import com.oracle.truffle.regex.tregex.string.Encodings.Encoding;
import com.oracle.truffle.regex.tregex.util.DebugUtil;
import com.oracle.truffle.regex.tregex.util.json.Json;
import com.oracle.truffle.regex.tregex.util.json.JsonConvertible;
import com.oracle.truffle.regex.tregex.util.json.JsonValue;
public final class RegexSource implements JsonConvertible {
private final String pattern;
private final String flags;
private final Encoding encoding;
private Source source;
private boolean hashComputed = false;
private int cachedHash;
public RegexSource(String pattern, String flags, Encoding encoding) {
this.pattern = pattern;
this.flags = flags;
this.encoding = encoding;
}
public String getPattern() {
return pattern;
}
public String getFlags() {
return flags;
}
public Encoding getEncoding() {
return encoding;
}
public Source getSource() {
if (source == null) {
String text = toString();
source = Source.newBuilder(RegexLanguage.ID, text, text).internal(true).name(text).mimeType(RegexLanguage.MIME_TYPE).build();
}
return source;
}
@Override
public int hashCode() {
if (!hashComputed) {
final int prime = 31;
int hash = 1;
hash = prime * hash + pattern.hashCode();
hash = prime * hash + flags.hashCode();
hash = prime * hash + encoding.hashCode();
cachedHash = hash;
hashComputed = true;
}
return cachedHash;
}
@Override
public boolean equals(Object obj) {
return this == obj || obj instanceof RegexSource &&
pattern.equals(((RegexSource) obj).pattern) &&
flags.equals(((RegexSource) obj).flags) &&
encoding.equals(((RegexSource) obj).encoding);
}
@Override
public String toString() {
return "/" + pattern + "/" + flags;
}
@TruffleBoundary
public String toStringEscaped() {
StringBuilder sb = new StringBuilder(pattern.length() + 2);
sb.append('/');
int i = 0;
while (i < pattern.length()) {
int c = pattern.codePointAt(i);
if (0x20 <= c && c <= 0x7e) {
sb.appendCodePoint(c);
} else {
sb.append("\\u");
if (c > 0xffff) {
i++;
sb.append(String.format("{%06x}", c));
} else {
sb.append(String.format("%04x", c));
}
}
i++;
}
return sb.append('/').append(flags).toString();
}
@TruffleBoundary
public String toFileName() {
StringBuilder sb = new StringBuilder(20);
int i = 0;
while (i < Math.min(pattern.length(), 20)) {
int c = pattern.codePointAt(i);
if (DebugUtil.isValidCharForFileName(c)) {
sb.appendCodePoint(c);
} else {
sb.append('_');
}
if (c > 0xffff) {
i += 2;
} else {
i++;
}
}
if (!flags.isEmpty()) {
sb.append('_').append(flags);
}
return sb.toString();
}
@TruffleBoundary
@Override
public JsonValue toJson() {
return Json.obj(Json.prop("pattern", pattern),
Json.prop("flags", flags));
}
}