Restructuring for better separation of Tool packages.

[mirror_edk2.git] / Tools / Java / Source / Cpptasks / net / sf / antcontrib / cpptasks / parser / AbstractParser.java

/*\r
 * \r
 * Copyright 2001-2004 The Ant-Contrib project\r
 *\r
 *  Licensed under the Apache License, Version 2.0 (the "License");\r
 *  you may not use this file except in compliance with the License.\r
 *  You may obtain a copy of the License at\r
 *\r
 *      http://www.apache.org/licenses/LICENSE-2.0\r
 *\r
 *  Unless required by applicable law or agreed to in writing, software\r
 *  distributed under the License is distributed on an "AS IS" BASIS,\r
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\r
 *  See the License for the specific language governing permissions and\r
 *  limitations under the License.\r
 */\r
package net.sf.antcontrib.cpptasks.parser;\r
import java.io.IOException;\r
import java.io.Reader;\r
/**\r
 * An abstract base class for simple parsers\r
 * \r
 * @author Curt Arnold\r
 */\r
public abstract class AbstractParser {\r
    /**\r
     * \r
     *  \r
     */\r
    protected AbstractParser() {\r
    }\r
    protected abstract void addFilename(String filename);\r
    public abstract AbstractParserState getNewLineState();\r
    protected void parse(Reader reader) throws IOException {\r
        char[] buf = new char[4096];\r
        AbstractParserState newLineState = getNewLineState();\r
        AbstractParserState state = newLineState;\r
        int charsRead = -1;\r
        do {\r
            charsRead = reader.read(buf, 0, buf.length);\r
            if (state == null) {\r
                for (int i = 0; i < charsRead; i++) {\r
                    if (buf[i] == '\n') {\r
                        state = newLineState;\r
                        break;\r
                    }\r
                }\r
            }\r
            if (state != null) {\r
                for (int i = 0; i < charsRead; i++) {\r
                    state = state.consume(buf[i]);\r
                    //\r
                    //  didn't match a production, skip to a new line\r
                    //\r
                    if (state == null) {\r
                        for (; i < charsRead; i++) {\r
                            if (buf[i] == '\n') {\r
                                state = newLineState;\r
                                break;\r
                            }\r
                        }\r
                    }\r
                }\r
            }\r
        } while (charsRead >= 0);\r
    }\r
}\r