Initial import.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@3 6f19259b-4bc3-4df7-8a09-765794883524

Tools/Source/Cpptasks/net/sf/antcontrib/cpptasks/parser/CaseInsensitiveLetterState.java

@@ -0,0 +1,87 @@
+/*
+ *
+ * Copyright 2004 The Ant-Contrib project
+ *
+ *  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.
+ */
+package net.sf.antcontrib.cpptasks.parser;
+
+/**
+ * This parser state checks consumed characters against a specific character
+ * (case insensitive).
+ *
+ * @author Curt Arnold
+ */
+public final class CaseInsensitiveLetterState
+    extends AbstractParserState {
+  /**
+   * Next state if a match is found.
+   */
+  private final AbstractParserState nextState;
+
+  /**
+   * Next state if not match is found.
+   */
+  private final AbstractParserState noMatchState;
+
+  /**
+   * Lower case version of character to match.
+   */
+  private final char lowerLetter;
+
+  /**
+   * Lower case version of character to match.
+   */
+  private final char upperLetter;
+
+  /**
+   * Constructor.
+   *
+   * @param parser
+   *            parser
+   * @param matchLetter
+   *            letter to match
+   * @param nextStateArg
+   *            next state if a match on the letter
+   * @param noMatchStateArg
+   *            state if no match on letter
+   */
+  public CaseInsensitiveLetterState(final AbstractParser parser,
+                                    final char matchLetter,
+                                    final AbstractParserState nextStateArg,
+                                    final AbstractParserState noMatchStateArg) {
+    super(parser);
+    this.lowerLetter = Character.toLowerCase(matchLetter);
+    this.upperLetter = Character.toUpperCase(matchLetter);
+    this.nextState = nextStateArg;
+    this.noMatchState = noMatchStateArg;
+  }
+
+  /**
+   * Consumes a character and returns the next state for the parser.
+   *
+   * @param ch
+   *            next character
+   * @return the configured nextState if ch is the expected character or the
+   *         configure noMatchState otherwise.
+   */
+  public AbstractParserState consume(final char ch) {
+    if (ch == lowerLetter || ch == upperLetter) {
+      return nextState;
+    }
+    if (ch == '\n') {
+      getParser().getNewLineState();
+    }
+    return noMatchState;
+  }
+}