Example usage for org.eclipse.jgit.util RawParseUtils prevLF

Introduction

In this page you can find the example usage for org.eclipse.jgit.util RawParseUtils prevLF.

Prototype

public static final int prevLF(byte[] b, int ptr, char chrA) 

Source Link

Document

Locate the previous position before either the given character or LF.

Usage

From source file:com.google.gerrit.server.notedb.ChangeNotesParser.java

License:Apache License

private void parseChangeMessage(PatchSet.Id psId, Account.Id accountId, RevCommit commit) {
    byte[] raw = commit.getRawBuffer();
    int size = raw.length;
    Charset enc = RawParseUtils.parseEncoding(raw);

    int subjectStart = RawParseUtils.commitMessage(raw, 0);
    if (subjectStart < 0 || subjectStart >= size) {
        return;/*from ww  w.  j a  va2  s  .c o  m*/
    }

    int subjectEnd = RawParseUtils.endOfParagraph(raw, subjectStart);
    if (subjectEnd == size) {
        return;
    }

    int changeMessageStart;

    if (raw[subjectEnd] == '\n') {
        changeMessageStart = subjectEnd + 2; //\n\n ends paragraph
    } else if (raw[subjectEnd] == '\r') {
        changeMessageStart = subjectEnd + 4; //\r\n\r\n ends paragraph
    } else {
        return;
    }

    int ptr = size - 1;
    int changeMessageEnd = -1;
    while (ptr > changeMessageStart) {
        ptr = RawParseUtils.prevLF(raw, ptr, '\r');
        if (ptr == -1) {
            break;
        }
        if (raw[ptr] == '\n') {
            changeMessageEnd = ptr - 1;
            break;
        } else if (raw[ptr] == '\r') {
            changeMessageEnd = ptr - 3;
            break;
        }
    }

    if (ptr <= changeMessageStart) {
        return;
    }

    String changeMsgString = RawParseUtils.decode(enc, raw, changeMessageStart, changeMessageEnd + 1);
    ChangeMessage changeMessage = new ChangeMessage(new ChangeMessage.Key(psId.getParentKey(), commit.name()),
            accountId, new Timestamp(commit.getCommitterIdent().getWhen().getTime()), psId);
    changeMessage.setMessage(changeMsgString);
    changeMessages.put(psId, changeMessage);
}

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