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DotGraphUtility.java
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128 lines (115 loc) · 3.32 KB
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package soot.util.dot;
/*-
* #%L
* Soot - a J*va Optimization Framework
* %%
* Copyright (C) 2002 Sable Research Group
* %%
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation, either version 2.1 of the
* License, or (at your option) any later version.
*
* This program 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. See the
* GNU General Lesser Public License for more details.
*
* You should have received a copy of the GNU General Lesser Public
* License along with this program. If not, see
* <http://www.gnu.org/licenses/lgpl-2.1.html>.
* #L%
*/
import java.io.IOException;
import java.io.OutputStream;
import java.util.Arrays;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class DotGraphUtility {
private static final Logger logger = LoggerFactory.getLogger(DotGraphUtility.class);
/**
* Replace any {@code "} with {@code \"}. If the {@code "} character was already escaped (i.e. {@code \"}), then the escape
* character is also escaped (i.e. {@code \\\"}).
*
* @param original
*
* @return
*/
public static String replaceQuotes(String original) {
byte[] ord = original.getBytes();
int quotes = 0;
boolean escapeActive = false;
for (byte element : ord) {
switch (element) {
case '\\':
escapeActive = true;
break;
case '\"':
quotes++;
if (escapeActive) {
quotes++;
}
// fallthrough
default:
escapeActive = false;
break;
}
}
if (quotes == 0) {
return original;
}
byte[] newsrc = new byte[ord.length + quotes];
for (int i = 0, j = 0, n = ord.length; i < n; i++, j++) {
if (ord[i] == '\"') {
if (i > 0 && ord[i - 1] == '\\') {
newsrc[j++] = (byte) '\\';
}
newsrc[j++] = (byte) '\\';
}
newsrc[j] = ord[i];
}
/*
* logger.debug("before "+original); logger.debug("after "+(new String(newsrc)));
*/
return new String(newsrc);
}
/**
* Replace any return ({@code \n}) with {@code \\n}.
*
* @param original
*
* @return
*/
public static String replaceReturns(String original) {
byte[] ord = original.getBytes();
int quotes = 0;
for (byte element : ord) {
if (element == '\n') {
quotes++;
}
}
if (quotes == 0) {
return original;
}
byte[] newsrc = new byte[ord.length + quotes];
for (int i = 0, j = 0, n = ord.length; i < n; i++, j++) {
if (ord[i] == '\n') {
newsrc[j++] = (byte) '\\';
newsrc[j] = (byte) 'n';
} else {
newsrc[j] = ord[i];
}
}
/*
* logger.debug("before "+original); logger.debug("after "+(new String(newsrc)));
*/
return new String(newsrc);
}
public static void renderLine(OutputStream out, String content, int indent) throws IOException {
char[] indentChars = new char[indent];
Arrays.fill(indentChars, ' ');
StringBuilder sb = new StringBuilder();
sb.append(indentChars).append(content).append('\n');
out.write(sb.toString().getBytes());
}
}