129 lines
3.9 KiB
Java
129 lines
3.9 KiB
Java
/*
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* Copyright 2015 The Netty Project
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*
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* The Netty Project licenses this file to you under the Apache License, version 2.0 (the
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* "License"); you may not use this file except in compliance with the License. You may obtain a
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* copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software distributed under the License
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* is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
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* or implied. See the License for the specific language governing permissions and limitations under
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* the License.
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*/
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package io.netty.util;
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import static io.netty.util.ByteProcessorUtils.CARRIAGE_RETURN;
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import static io.netty.util.ByteProcessorUtils.HTAB;
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import static io.netty.util.ByteProcessorUtils.LINE_FEED;
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import static io.netty.util.ByteProcessorUtils.SPACE;
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/**
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* Provides a mechanism to iterate over a collection of bytes.
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*/
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public interface ByteProcessor {
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/**
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* A {@link ByteProcessor} which finds the first appearance of a specific byte.
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*/
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class IndexOfProcessor implements ByteProcessor {
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private final byte byteToFind;
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public IndexOfProcessor(byte byteToFind) {
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this.byteToFind = byteToFind;
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}
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@Override
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public boolean process(byte value) {
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return value != byteToFind;
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}
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}
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/**
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* A {@link ByteProcessor} which finds the first appearance which is not of a specific byte.
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*/
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class IndexNotOfProcessor implements ByteProcessor {
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private final byte byteToNotFind;
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public IndexNotOfProcessor(byte byteToNotFind) {
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this.byteToNotFind = byteToNotFind;
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}
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@Override
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public boolean process(byte value) {
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return value == byteToNotFind;
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}
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}
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/**
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* Aborts on a {@code NUL (0x00)}.
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*/
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ByteProcessor FIND_NUL = new IndexOfProcessor((byte) 0);
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/**
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* Aborts on a non-{@code NUL (0x00)}.
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*/
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ByteProcessor FIND_NON_NUL = new IndexNotOfProcessor((byte) 0);
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/**
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* Aborts on a {@code CR ('\r')}.
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*/
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ByteProcessor FIND_CR = new IndexOfProcessor(CARRIAGE_RETURN);
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/**
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* Aborts on a non-{@code CR ('\r')}.
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*/
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ByteProcessor FIND_NON_CR = new IndexNotOfProcessor(CARRIAGE_RETURN);
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/**
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* Aborts on a {@code LF ('\n')}.
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*/
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ByteProcessor FIND_LF = new IndexOfProcessor(LINE_FEED);
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/**
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* Aborts on a non-{@code LF ('\n')}.
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*/
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ByteProcessor FIND_NON_LF = new IndexNotOfProcessor(LINE_FEED);
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/**
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* Aborts on a semicolon {@code (';')}.
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*/
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ByteProcessor FIND_SEMI_COLON = new IndexOfProcessor((byte) ';');
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/**
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* Aborts on a comma {@code (',')}.
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*/
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ByteProcessor FIND_COMMA = new IndexOfProcessor((byte) ',');
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/**
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* Aborts on a ascii space character ({@code ' '}).
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*/
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ByteProcessor FIND_ASCII_SPACE = new IndexOfProcessor(SPACE);
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/**
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* Aborts on a {@code CR ('\r')} or a {@code LF ('\n')}.
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*/
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ByteProcessor FIND_CRLF = value -> value != CARRIAGE_RETURN && value != LINE_FEED;
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/**
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* Aborts on a byte which is neither a {@code CR ('\r')} nor a {@code LF ('\n')}.
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*/
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ByteProcessor FIND_NON_CRLF = value -> value == CARRIAGE_RETURN || value == LINE_FEED;
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/**
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* Aborts on a linear whitespace (a ({@code ' '} or a {@code '\t'}).
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*/
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ByteProcessor FIND_LINEAR_WHITESPACE = value -> value != SPACE && value != HTAB;
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/**
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* Aborts on a byte which is not a linear whitespace (neither {@code ' '} nor {@code '\t'}).
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*/
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ByteProcessor FIND_NON_LINEAR_WHITESPACE = value -> value == SPACE || value == HTAB;
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/**
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* @return {@code true} if the processor wants to continue the loop and handle the next byte in the buffer.
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* {@code false} if the processor wants to stop handling bytes and abort the loop.
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*/
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boolean process(byte value) throws Exception;
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}
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