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/* ____ ____ ____ ____ ______ *\
** / __// __ \/ __// __ \/ ____/ SOcos COmpiles Scala **
** __\_ \/ /_/ / /__/ /_/ /\_ \ (c) 2002, LAMP/EPFL **
** /_____/\____/\___/\____/____/ **
** **
** $Id$
\* */
package scalac.util;
public final class Position {
/** source file positions are integers in the format:
* line-number << LINESHIFT + column-number
* NOPOS represents an undefined position.
*/
public static final int LINESHIFT = 10;
public static final int FILESHIFT = 26;
public static final int COLUMNMASK = 1023;
public static final int LINEMASK = 0xffff;
/** predefined positions
*/
public static final int NOPOS = 0;
/** first position in a source file
*/
public static final int FIRSTPOS = (1 << LINESHIFT) + 1;
/** encode a line and column number into a single int
*/
public static int encode(int line, int col, int file) {
return (file << FILESHIFT) | (line << LINESHIFT) | col;
}
/** get the file id of an encoded position
*/
public static int file(int pos) {
return pos >>> FILESHIFT;
}
/** get the line number out of an encoded position
*/
public static int line(int pos) {
return (pos >>> LINESHIFT) & LINEMASK;
}
/** return the column number of an encoded position
*/
public static int column(int pos) {
return pos & COLUMNMASK;
}
}
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