Example usage for org.antlr.v4.runtime CharStream index

Introduction

In this page you can find the example usage for org.antlr.v4.runtime CharStream index.

Prototype

int index();

Source Link

Document

Return the index into the stream of the input symbol referred to by LA(1) .

Usage

From source file:com.antsdb.saltedfish.sql.mysql.ExprGenerator.java

License:Open Source License

private static byte[] getBytes(Literal_value_binaryContext rule) {
    Token token = rule.STRING_LITERAL().getSymbol();
    byte[] bytes = new byte[token.getStopIndex() - token.getStartIndex() - 1];
    CharStream cs = token.getInputStream();
    int pos = cs.index();
    cs.seek(token.getStartIndex() + 1);/*from  www.  j a va  2s.c  o m*/
    int j = 0;
    for (int i = 0; i < bytes.length; i++) {
        int ch = cs.LA(i + 1);
        if (ch == '\\') {
            i++;
            ch = cs.LA(i + 1);
            if (ch == '0') {
                ch = 0;
            } else if (ch == 'n') {
                ch = '\n';
            } else if (ch == 'r') {
                ch = '\r';
            } else if (ch == 'Z') {
                ch = '\032';
            }
        }
        bytes[j] = (byte) ch;
        j++;
    }
    cs.seek(pos);
    if (j != bytes.length) {
        // esacpe characters
        byte[] old = bytes;
        bytes = new byte[j];
        System.arraycopy(old, 0, bytes, 0, j);
    }
    return bytes;
}

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From source file:com.antsdb.saltedfish.sql.mysql.MysqlParserFactory.java

License:Open Source License

/**
 * mysql executes statement in a specially formatted comment like
 * / *!40101 SET NAMES utf8 * /;//from   w  w  w .  ja  v a2s  .  c o  m
 * @param cs
 * @return
 */
private static boolean isCommtedStatement(CharStream cs) {
    int idx = cs.index();
    if (cs.LA(idx + 1) != '/') {
        return false;
    }
    if (cs.LA(idx + 2) != '*') {
        return false;
    }
    if (cs.LA(idx + 3) != '!') {
        return false;
    }
    if (cs.LA(idx + 4) != '4') {
        return false;
    }
    return true;
}

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From source file:com.tunnelvisionlabs.postgresql.PostgreSqlLexerAtnSimulator.java

License:Open Source License

@Override
protected int execATN(CharStream input, DFAState ds0) {
    // This works around bug #688 in the ANTLR 4 runtime where zero-length
    // tokens are not recognized.
    if (ds0.isAcceptState) {
        captureSimState(prevAccept, new InputWithFixedIndex(input.index() - 1), ds0);
    }/*w ww .ja v  a2 s .  c  o m*/

    return super.execATN(input, ds0);
}

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From source file:org.apache.lucene.expressions.js.JavascriptErrorHandlingLexer.java

License:Apache License

/**
 * Ensures the ANTLR lexer will throw an exception after the first error
 * @param lnvae the lexer exception//from www .j av a 2 s .co  m
 */
@Override
public void recover(LexerNoViableAltException lnvae) {
    CharStream charStream = lnvae.getInputStream();
    int startIndex = lnvae.getStartIndex();
    String text = charStream.getText(Interval.of(startIndex, charStream.index()));

    ParseException parseException = new ParseException("unexpected character '" + getErrorDisplay(text) + "'"
            + " on line (" + _tokenStartLine + ") position (" + _tokenStartCharPositionInLine + ")",
            _tokenStartCharIndex);
    parseException.initCause(lnvae);
    throw new RuntimeException(parseException);
}

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From source file:org.elasticsearch.painless.ErrorHandlingLexer.java

License:Apache License

@Override
public void recover(LexerNoViableAltException lnvae) {
    CharStream charStream = lnvae.getInputStream();
    int startIndex = lnvae.getStartIndex();
    String text = charStream.getText(Interval.of(startIndex, charStream.index()));

    ParseException parseException = new ParseException("Error [" + _tokenStartLine + ":"
            + _tokenStartCharPositionInLine + "]: unexpected character [" + getErrorDisplay(text) + "].",
            _tokenStartCharIndex);/*from w  ww  . j a  v a 2s. com*/
    parseException.initCause(lnvae);
    throw new RuntimeException(parseException);
}

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