JDK 11 jdk.compiler.jmod - Compiler Tool

JDK 11 jdk.compiler.jmod is the JMOD file for JDK 11 Compiler tool, which can be invoked by the "javac" command.

JDK 11 Compiler tool compiled class files are stored in \fyicenter\jdk-11.0.1\jmods\jdk.compiler.jmod.

JDK 11 Compiler tool compiled class files are also linked and stored in the \fyicenter\jdk-11.0.1\lib\modules JImage file.

JDK 11 Compiler source code files are stored in \fyicenter\jdk-11.0.1\lib\src.zip\jdk.compiler.

You can click and view the content of each source code file in the list below.

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com/sun/tools/javac/util/Position.java

/*
 * Copyright (c) 1999, 2012, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
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 */

package com.sun.tools.javac.util;

import java.util.BitSet;

import com.sun.tools.javac.util.DefinedBy.Api;

import static com.sun.tools.javac.util.LayoutCharacters.*;

/** A class that defines source code positions as simple character
 *  offsets from the beginning of the file. The first character
 *  is at position 0.
 *
 *  Support is also provided for (line,column) coordinates, but tab
 *  expansion is optional and no Unicode excape translation is considered.
 *  The first character is at location (1,1).
 *
 *  <p><b>This is NOT part of any supported API.
 *  If you write code that depends on this, you do so at your own risk.
 *  This code and its internal interfaces are subject to change or
 *  deletion without notice.</b>
 */
public class Position {
    public static final int NOPOS        = -1;

    public static final int FIRSTPOS     = 0;
    public static final int FIRSTLINE    = 1;
    public static final int FIRSTCOLUMN  = 1;

    public static final int LINESHIFT    = 10;
    public static final int MAXCOLUMN    = (1<<LINESHIFT) - 1;
    public static final int MAXLINE      = (1<<(Integer.SIZE-LINESHIFT)) - 1;

    public static final int MAXPOS       = Integer.MAX_VALUE;

    /**
     * This is class is not supposed to be instantiated.
     */
    private Position() {}

    /** A two-way map between line/column numbers and positions,
     *  derived from a scan done at creation time.  Tab expansion is
     *  optionally supported via a character map.  Text content
     *  is not retained.
     *<p>
     *  Notes:  The first character position FIRSTPOS is at
     *  (FIRSTLINE,FIRSTCOLUMN).  No account is taken of Unicode escapes.
     *
     * @param   src         Source characters
     * @param   max         Number of characters to read
     * @param   expandTabs  If true, expand tabs when calculating columns
     */
    public static LineMap makeLineMap(char[] src, int max, boolean expandTabs) {
        LineMapImpl lineMap = expandTabs ?
            new LineTabMapImpl(max) : new LineMapImpl();
        lineMap.build(src, max);
        return lineMap;
    }

    /** Encode line and column numbers in an integer as:
     *  {@code line-number << LINESHIFT + column-number }.
     *  {@link Position#NOPOS} represents an undefined position.
     *
     * @param  line  number of line (first is 1)
     * @param  col   number of character on line (first is 1)
     * @return       an encoded position or {@link Position#NOPOS}
     *               if the line or column number is too big to
     *               represent in the encoded format
     * @throws IllegalArgumentException if line or col is less than 1
     */
    public static int encodePosition(int line, int col) {
        if (line < 1)
            throw new IllegalArgumentException("line must be greater than 0");
        if (col < 1)
            throw new IllegalArgumentException("column must be greater than 0");

        if (line > MAXLINE || col > MAXCOLUMN) {
            return NOPOS;
        }
        return (line << LINESHIFT) + col;
    }

    public static interface LineMap extends com.sun.source.tree.LineMap {
        /** Find the start position of a line.
         *
         * @param line number of line (first is 1)
         * @return     position of first character in line
         * @throws  ArrayIndexOutOfBoundsException
         *           if {@code lineNumber < 1}
         *           if {@code lineNumber > no. of lines}
         */
        int getStartPosition(int line);

        /** Find the position corresponding to a (line,column).
         *
         * @param   line    number of line (first is 1)
         * @param   column  number of character on line (first is 1)
         *
         * @return  position of character
         * @throws  ArrayIndexOutOfBoundsException
         *           if {@code line < 1}
         *           if {@code line > no. of lines}
         */
        int getPosition(int line, int column);

        /** Find the line containing a position; a line termination
         * character is on the line it terminates.
         *
         * @param   pos  character offset of the position
         * @return the line number on which pos occurs (first line is 1)
         */
        int getLineNumber(int pos);

        /** Find the column for a character position.
         *  Note:  this method does not handle tab expansion.
         *  If tab expansion is needed, use a LineTabMap instead.
         *
         * @param  pos   character offset of the position
         * @return       the column number at which pos occurs
         */
        int getColumnNumber(int pos);
    }

    static class LineMapImpl implements LineMap {
        protected int[] startPosition; // start position of each line

        protected LineMapImpl() {}

        protected void build(char[] src, int max) {
            int c = 0;
            int i = 0;
            int[] linebuf = new int[max];
            while (i < max) {
                linebuf[c++] = i;
                do {
                    char ch = src[i];
                    if (ch == '\r' || ch == '\n') {
                        if (ch == '\r' && (i+1) < max && src[i+1] == '\n')
                            i += 2;
                        else
                            ++i;
                        break;
                    }
                    else if (ch == '\t')
                        setTabPosition(i);
                } while (++i < max);
            }
            this.startPosition = new int[c];
            System.arraycopy(linebuf, 0, startPosition, 0, c);
        }

        public int getStartPosition(int line) {
            return startPosition[line - FIRSTLINE];
        }

        @DefinedBy(Api.COMPILER_TREE)
        public long getStartPosition(long line) {
            return getStartPosition(longToInt(line));
        }

        public int getPosition(int line, int column) {
            return startPosition[line - FIRSTLINE] + column - FIRSTCOLUMN;
        }

        @DefinedBy(Api.COMPILER_TREE)
        public long getPosition(long line, long column) {
            return getPosition(longToInt(line), longToInt(column));
        }

        // Cache of last line number lookup
        private int lastPosition = Position.FIRSTPOS;
        private int lastLine = Position.FIRSTLINE;

        public int getLineNumber(int pos) {
            if (pos == lastPosition) {
                return lastLine;
            }
            lastPosition = pos;

            int low = 0;
            int high = startPosition.length-1;
            while (low <= high) {
                int mid = (low + high) >> 1;
                int midVal = startPosition[mid];

                if (midVal < pos)
                    low = mid + 1;
                else if (midVal > pos)
                    high = mid - 1;
                else {
                    lastLine = mid + 1; // pos is at beginning of this line
                    return lastLine;
                }
            }
            lastLine = low;
            return lastLine;  // pos is on this line
        }

        @DefinedBy(Api.COMPILER_TREE)
        public long getLineNumber(long pos) {
            return getLineNumber(longToInt(pos));
        }

        public int getColumnNumber(int pos) {
            return pos - startPosition[getLineNumber(pos) - FIRSTLINE] + FIRSTCOLUMN;
        }

        @DefinedBy(Api.COMPILER_TREE)
        public long getColumnNumber(long pos) {
            return getColumnNumber(longToInt(pos));
        }

        private static int longToInt(long longValue) {
            int intValue = (int)longValue;
            if (intValue != longValue)
                throw new IndexOutOfBoundsException();
            return intValue;
        }

        protected void setTabPosition(int offset) {}
    }

    /**
     * A LineMap that handles tab expansion correctly.  The cost is
     * an additional bit per character in the source array.
     */
    public static class LineTabMapImpl extends LineMapImpl {
        private BitSet tabMap;       // bits set for tab positions.

        public LineTabMapImpl(int max) {
            super();
            tabMap = new BitSet(max);
        }

        protected void setTabPosition(int offset) {
            tabMap.set(offset);
        }

        public int getColumnNumber(int pos) {
            int lineStart = startPosition[getLineNumber(pos) - FIRSTLINE];
            int column = 0;
            for (int bp = lineStart; bp < pos; bp++) {
                if (tabMap.get(bp))
                    column = (column / TabInc * TabInc) + TabInc;
                else
                    column++;
            }
            return column + FIRSTCOLUMN;
        }

        public int getPosition(int line, int column) {
            int pos = startPosition[line - FIRSTLINE];
            column -= FIRSTCOLUMN;
            int col = 0;
            while (col < column) {
                pos++;
                if (tabMap.get(pos))
                    col = (col / TabInc * TabInc) + TabInc;
                else
                    col++;
            }
            return pos;
        }
    }
}

com/sun/tools/javac/util/Position.java

 

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File name: jdk.compiler-11.0.1-src.zip
File size: 1347269 bytes
Release date: 2018-11-04
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