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/*
* This file is part of ClassGraph.
*
* Author: Luke Hutchison
*
* Hosted at: https://github.com/classgraph/classgraph
*
* --
*
* The MIT License (MIT)
*
* Copyright (c) 2020 Luke Hutchison
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
* documentation files (the "Software"), to deal in the Software without restriction, including without
* limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
* the Software, and to permit persons to whom the Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall be included in all copies or substantial
* portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT
* LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO
* EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE
* OR OTHER DEALINGS IN THE SOFTWARE.
*/
package nonapi.com.hazelcast.io.github.classgraph.fileslice.reader;
import java.io.IOException;
import java.nio.ByteBuffer;
/** Interface for random access to values in byte order. */
public interface RandomAccessReader {
/**
* Read bytes into a {@link ByteBuffer}.
*
* @param srcOffset
* The offset to start reading from.
* @param dstBuf
* The {@link ByteBuffer} to write into.
* @param dstBufStart
* The offset within the destination buffer to start writing at.
* @param numBytes
* The number of bytes to read.
* @return The number of bytes actually read, or -1 if no more bytes could be read.
* @throws IOException
* If there was an exception while reading.
*/
int read(long srcOffset, ByteBuffer dstBuf, int dstBufStart, int numBytes) throws IOException;
/**
* Read bytes into a byte array.
*
* @param srcOffset
* The offset to start reading from.
* @param dstArr
* The byte array to write into.
* @param dstArrStart
* The offset within the destination array to start writing at.
* @param numBytes
* The number of bytes to read.
* @return The number of bytes actually read, or -1 if no more bytes could be read.
* @throws IOException
* If there was an exception while reading.
*/
int read(long srcOffset, byte[] dstArr, int dstArrStart, int numBytes) throws IOException;
/**
* Read a byte at a specific offset (without changing the current cursor offset).
*
* @param offset
* The buffer offset to read from.
* @return The byte at the offset.
* @throws IOException
* If there was an exception while reading.
*/
byte readByte(final long offset) throws IOException;
/**
* Read an unsigned byte at a specific offset (without changing the current cursor offset).
*
* @param offset
* The buffer offset to read from.
* @return The unsigned byte at the offset.
* @throws IOException
* If there was an exception while reading.
*/
int readUnsignedByte(final long offset) throws IOException;
/**
* Read a short at a specific offset (without changing the current cursor offset).
*
* @param offset
* The buffer offset to read from.
* @return The short at the offset.
* @throws IOException
* If there was an exception while reading.
*/
short readShort(final long offset) throws IOException;
/**
* Read a unsigned short at a specific offset (without changing the current cursor offset).
*
* @param offset
* The buffer offset to read from.
* @return The unsigned short at the offset.
* @throws IOException
* If there was an exception while reading.
*/
int readUnsignedShort(final long offset) throws IOException;
/**
* Read a int at a specific offset (without changing the current cursor offset).
*
* @param offset
* The buffer offset to read from.
* @return The int at the offset.
* @throws IOException
* If there was an exception while reading.
*/
int readInt(final long offset) throws IOException;
/**
* Read a unsigned int at a specific offset (without changing the current cursor offset).
*
* @param offset
* The buffer offset to read from.
* @return The int at the offset, as a long.
* @throws IOException
* If there was an exception while reading.
*/
long readUnsignedInt(final long offset) throws IOException;
/**
* Read a long at a specific offset (without changing the current cursor offset).
*
* @param offset
* The buffer offset to read from.
* @return The long at the offset.
* @throws IOException
* If there was an exception while reading.
*/
long readLong(final long offset) throws IOException;
/**
* Reads the "modified UTF8" format defined in the Java classfile spec, optionally replacing '/' with '.', and
* optionally removing the prefix "L" and the suffix ";".
*
* @param offset
* The start offset of the string.
* @param numBytes
* The number of bytes of the UTF8 encoding of the string.
* @param replaceSlashWithDot
* If true, replace '/' with '.'.
* @param stripLSemicolon
* If true, string final ';' character.
* @return The string.
* @throws IOException
* If an I/O exception occurs.
*/
String readString(final long offset, final int numBytes, final boolean replaceSlashWithDot,
final boolean stripLSemicolon) throws IOException;
/**
* Reads the "modified UTF8" format defined in the Java classfile spec.
*
* @param offset
* The start offset of the string.
* @param numBytes
* The number of bytes of the UTF8 encoding of the string.
* @return The string.
* @throws IOException
* If an I/O exception occurs.
*/
String readString(final long offset, final int numBytes) throws IOException;
}
