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/*
* SMAPSourceDebugExtension.java - Parse source debug extensions and
* enhance stack traces.
*
* Copyright (c) 2012 Michael Schierl
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND THE CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
* TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
* USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package me.lucko.spark.fabric.smap;
import java.util.HashMap;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* Utility class to parse "SMAP" (source map) information from loaded Java classes.
*
* @author <a href="https://stackoverflow.com/a/11299757">Michael Schierl</a>
*/
public class SourceMap {
private final String generatedFileName;
private final String firstStratum;
private final Map<Integer, FileInfo> fileinfo = new HashMap<>();
private final Map<Integer, int[]> reverseLineMapping = new HashMap<>();
private static final Pattern LINE_INFO_PATTERN = Pattern.compile("([0-9]+)(?:#([0-9]+))?(?:,([0-9]+))?:([0-9]+)(?:,([0-9]+))?");
public SourceMap(String value) {
String[] lines = value.split("\n");
if (!lines[0].equals("SMAP") || !lines[3].startsWith("*S ") || !lines[4].equals("*F")) {
throw new IllegalArgumentException(value);
}
this.generatedFileName = lines[1];
this.firstStratum = lines[3].substring(3);
int idx = 5;
while (!lines[idx].startsWith("*")) {
String infoline = lines[idx++];
String path = null;
if (infoline.startsWith("+ ")) {
path = lines[idx++];
infoline = infoline.substring(2);
}
int pos = infoline.indexOf(" ");
int filenum = Integer.parseInt(infoline.substring(0, pos));
String name = infoline.substring(pos + 1);
this.fileinfo.put(filenum, new FileInfo(name, path == null ? name : path));
}
if (lines[idx].equals("*L")) {
idx++;
int lastLFI = 0;
while (!lines[idx].startsWith("*")) {
Matcher m = LINE_INFO_PATTERN.matcher(lines[idx++]);
if (!m.matches()) {
throw new IllegalArgumentException(lines[idx - 1]);
}
int inputStartLine = Integer.parseInt(m.group(1));
int lineFileID = m.group(2) == null ? lastLFI : Integer.parseInt(m.group(2));
int repeatCount = m.group(3) == null ? 1 : Integer.parseInt(m.group(3));
int outputStartLine = Integer.parseInt(m.group(4));
int outputLineIncrement = m.group(5) == null ? 1 : Integer.parseInt(m.group(5));
for (int i = 0; i < repeatCount; i++) {
int[] inputMapping = new int[] { lineFileID, inputStartLine + i };
int baseOL = outputStartLine + i * outputLineIncrement;
for (int ol = baseOL; ol < baseOL + outputLineIncrement; ol++) {
if (!this.reverseLineMapping.containsKey(ol)) {
this.reverseLineMapping.put(ol, inputMapping);
}
}
}
lastLFI = lineFileID;
}
}
}
public String getGeneratedFileName() {
return this.generatedFileName;
}
public String getFirstStratum() {
return this.firstStratum;
}
public Map<Integer, FileInfo> getFileInfo() {
return this.fileinfo;
}
public Map<Integer, int[]> getReverseLineMapping() {
return this.reverseLineMapping;
}
public record FileInfo(String name, String path) { }
}
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