/* * Copyright 1999-2004 The Apache Software Foundation. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ /* * $Id: OpCodes.java,v 1.9 2004/02/17 04:32:48 minchau Exp $ */ package com.sun.org.apache.xpath.internal.compiler; /** * Operations codes for XPath. * * Code for the descriptions of the operations codes: * [UPPER CASE] indicates a literal value, * [lower case] is a description of a value, * ([length] always indicates the length of the operation, * including the operations code and the length integer.) * {UPPER CASE} indicates the given production, * {description} is the description of a new production, * (For instance, {boolean expression} means some expression * that should be resolved to a boolean.) * * means that it occurs zero or more times, * + means that it occurs one or more times, * ? means that it is optional. * * returns: indicates what the production should return. */ public class OpCodes { /** * [ENDOP] * Some operators may like to have a terminator. * @xsl.usage advanced */ public static final int ENDOP = -1; /** * [EMPTY] * Empty slot to indicate NULL. */ public static final int EMPTY = -2; /** * [ELEMWILDCARD] * Means ELEMWILDCARD ("*"), used instead * of string index in some places. * @xsl.usage advanced */ public static final int ELEMWILDCARD = -3; /** * [OP_XPATH] * [length] * {expression} * * returns: * XNodeSet * XNumber * XString * XBoolean * XRTree * XObject * @xsl.usage advanced */ public static final int OP_XPATH = 1; /** * [OP_OR] * [length] * {boolean expression} * {boolean expression} * * returns: * XBoolean * @xsl.usage advanced */ public static final int OP_OR = 2; /** * [OP_AND] * [length] * {boolean expression} * {boolean expression} * * returns: * XBoolean * @xsl.usage advanced */ public static final int OP_AND = 3; /** * [OP_NOTEQUALS] * [length] * {expression} * {expression} * * returns: * XBoolean * @xsl.usage advanced */ public static final int OP_NOTEQUALS = 4; /** * [OP_EQUALS] * [length] * {expression} * {expression} * * returns: * XBoolean * @xsl.usage advanced */ public static final int OP_EQUALS = 5; /** * [OP_LTE] (less-than-or-equals) * [length] * {number expression} * {number expression} * * returns: * XBoolean * @xsl.usage advanced */ public static final int OP_LTE = 6; /** * [OP_LT] (less-than) * [length] * {number expression} * {number expression} * * returns: * XBoolean * @xsl.usage advanced */ public static final int OP_LT = 7; /** * [OP_GTE] (greater-than-or-equals) * [length] * {number expression} * {number expression} * * returns: * XBoolean * @xsl.usage advanced */ public static final int OP_GTE = 8; /** * [OP_GT] (greater-than) * [length] * {number expression} * {number expression} * * returns: * XBoolean * @xsl.usage advanced */ public static final int OP_GT = 9; /** * [OP_PLUS] * [length] * {number expression} * {number expression} * * returns: * XNumber * @xsl.usage advanced */ public static final int OP_PLUS = 10; /** * [OP_MINUS] * [length] * {number expression} * {number expression} * * returns: * XNumber * @xsl.usage advanced */ public static final int OP_MINUS = 11; /** * [OP_MULT] * [length] * {number expression} * {number expression} * * returns: * XNumber * @xsl.usage advanced */ public static final int OP_MULT = 12; /** * [OP_DIV] * [length] * {number expression} * {number expression} * * returns: * XNumber * @xsl.usage advanced */ public static final int OP_DIV = 13; /** * [OP_MOD] * [length] * {number expression} * {number expression} * * returns: * XNumber * @xsl.usage advanced */ public static final int OP_MOD = 14; /** * [OP_QUO] * [length] * {number expression} * {number expression} * * returns: * XNumber * @xsl.usage advanced */ public static final int OP_QUO = 15; /** * [OP_NEG] * [length] * {number expression} * * returns: * XNumber * @xsl.usage advanced */ public static final int OP_NEG = 16; /** * [OP_STRING] (cast operation) * [length] * {expression} * * returns: * XString * @xsl.usage advanced */ public static final int OP_STRING = 17; /** * [OP_BOOL] (cast operation) * [length] * {expression} * * returns: * XBoolean * @xsl.usage advanced */ public static final int OP_BOOL = 18; /** * [OP_NUMBER] (cast operation) * [length] * {expression} * * returns: * XBoolean * @xsl.usage advanced */ public static final int OP_NUMBER = 19; /** * [OP_UNION] * [length] * {PathExpr}+ * * returns: * XNodeSet * @xsl.usage advanced */ public static final int OP_UNION = 20; /** * [OP_LITERAL] * [3] * [index to token] * * returns: * XString * @xsl.usage advanced */ public static final int OP_LITERAL = 21; /** The low opcode for nodesets, needed by getFirstPredicateOpPos and * getNextStepPos. */ static final int FIRST_NODESET_OP = 22; /** * [OP_VARIABLE] * [4] * [index to namespace token, or EMPTY] * [index to function name token] * * returns: * XString * @xsl.usage advanced */ public static final int OP_VARIABLE = 22; /** * [OP_GROUP] * [length] * {expression} * * returns: * XNodeSet * XNumber * XString * XBoolean * XRTree * XObject * @xsl.usage advanced */ public static final int OP_GROUP = 23; /** * [OP_EXTFUNCTION] (Extension function.) * [length] * [index to namespace token] * [index to function name token] * {OP_ARGUMENT} * * returns: * XNodeSet * XNumber * XString * XBoolean * XRTree * XObject * @xsl.usage advanced */ public static final int OP_EXTFUNCTION = 24; /** * [OP_FUNCTION] * [length] * [FUNC_name] * {OP_ARGUMENT} * [ENDOP] * * returns: * XNodeSet * XNumber * XString * XBoolean * XRTree * XObject * @xsl.usage advanced */ public static final int OP_FUNCTION = 25; /** The last opcode for stuff that can be a nodeset. */ static final int LAST_NODESET_OP = 25; /** * [OP_ARGUMENT] (Function argument.) * [length] * {expression} * * returns: * XNodeSet * XNumber * XString * XBoolean * XRTree * XObject * @xsl.usage advanced */ public static final int OP_ARGUMENT = 26; /** * [OP_NUMBERLIT] (Number literal.) * [3] * [index to token] * * returns: * XString * @xsl.usage advanced */ public static final int OP_NUMBERLIT = 27; /** * [OP_LOCATIONPATH] * [length] * {FROM_stepType} * | {function} * {predicate} * [ENDOP] * * (Note that element and attribute namespaces and * names can be wildcarded '*'.) * * returns: * XNodeSet * @xsl.usage advanced */ public static final int OP_LOCATIONPATH = 28; // public static final int LOCATIONPATHEX_MASK = 0x0000FFFF; // public static final int LOCATIONPATHEX_ISSIMPLE = 0x00010000; // public static final int OP_LOCATIONPATH_EX = (28 | 0x00010000); /** * [OP_PREDICATE] * [length] * {expression} * [ENDOP] (For safety) * * returns: * XBoolean or XNumber * @xsl.usage advanced */ public static final int OP_PREDICATE = 29; /** * [OP_MATCHPATTERN] * [length] * {PathExpr}+ * * returns: * XNodeSet * @xsl.usage advanced */ public static final int OP_MATCHPATTERN = 30; /** * [OP_LOCATIONPATHPATTERN] * [length] * {FROM_stepType} * | {function}{predicate} * [ENDOP] * returns: * XNodeSet * @xsl.usage advanced */ public static final int OP_LOCATIONPATHPATTERN = 31; /** * [NODETYPE_COMMENT] * No size or arguments. * Note: must not overlap function OP number! * * returns: * XBoolean * @xsl.usage advanced */ public static final int NODETYPE_COMMENT = 1030; /** * [NODETYPE_TEXT] * No size or arguments. * Note: must not overlap function OP number! * * returns: * XBoolean * @xsl.usage advanced */ public static final int NODETYPE_TEXT = 1031; /** * [NODETYPE_PI] * [index to token] * Note: must not overlap function OP number! * * returns: * XBoolean * @xsl.usage advanced */ public static final int NODETYPE_PI = 1032; /** * [NODETYPE_NODE] * No size or arguments. * Note: must not overlap function OP number! * * returns: * XBoolean * @xsl.usage advanced */ public static final int NODETYPE_NODE = 1033; /** * [NODENAME] * [index to ns token or EMPTY] * [index to name token] * * returns: * XBoolean * @xsl.usage advanced */ public static final int NODENAME = 34; /** * [NODETYPE_ROOT] * No size or arguments. * * returns: * XBoolean * @xsl.usage advanced */ public static final int NODETYPE_ROOT = 35; /** * [NODETYPE_ANY] * No size or arguments. * * returns: * XBoolean * @xsl.usage advanced */ public static final int NODETYPE_ANYELEMENT = 36; /** * [NODETYPE_ANY] * No size or arguments. * * returns: * XBoolean * @xsl.usage advanced */ public static final int NODETYPE_FUNCTEST = 1034; /** * [FROM_stepType] * [length, including predicates] * [length of just the step, without the predicates] * {node test} * {predicates}? * * returns: * XBoolean * @xsl.usage advanced */ public static final int AXES_START_TYPES = 37; /** ancestor axes opcode. */ public static final int FROM_ANCESTORS = 37; /** ancestor-or-self axes opcode. */ public static final int FROM_ANCESTORS_OR_SELF = 38; /** attribute axes opcode. */ public static final int FROM_ATTRIBUTES = 39; /** children axes opcode. */ public static final int FROM_CHILDREN = 40; /** descendants axes opcode. */ public static final int FROM_DESCENDANTS = 41; /** descendants-of-self axes opcode. */ public static final int FROM_DESCENDANTS_OR_SELF = 42; /** following axes opcode. */ public static final int FROM_FOLLOWING = 43; /** following-siblings axes opcode. */ public static final int FROM_FOLLOWING_SIBLINGS = 44; /** parent axes opcode. */ public static final int FROM_PARENT = 45; /** preceding axes opcode. */ public static final int FROM_PRECEDING = 46; /** preceding-sibling axes opcode. */ public static final int FROM_PRECEDING_SIBLINGS = 47; /** self axes opcode. */ public static final int FROM_SELF = 48; /** namespace axes opcode. */ public static final int FROM_NAMESPACE = 49; /** '/' axes opcode. */ public static final int FROM_ROOT = 50; /** * For match patterns. * @xsl.usage advanced */ public static final int MATCH_ATTRIBUTE = 51; /** * For match patterns. * @xsl.usage advanced */ public static final int MATCH_ANY_ANCESTOR = 52; /** * For match patterns. * @xsl.usage advanced */ public static final int MATCH_IMMEDIATE_ANCESTOR = 53; /** The end of the axes types. */ public static final int AXES_END_TYPES = 53; /** The next free ID. Please keep this up to date. */ private static final int NEXT_FREE_ID = 99; }