Package ghidra.program.model.mem

Class ByteMemBufferImpl

java.lang.Object
ghidra.program.model.mem.ByteMemBufferImpl
All Implemented Interfaces:
MemBuffer
public class ByteMemBufferImpl extends Object implements MemBuffer
Simple byte buffer implementation of the memBuffer. Even if a Memory is provided, the available bytes will be limited to the bytes provided during construction.

  • Constructor Details

    • ByteMemBufferImpl

      public ByteMemBufferImpl(Address addr, byte[] bytes, boolean isBigEndian)
      Construct a ByteMemBufferImpl object
      Parameters:
      addr - the address to associate with the bytes
      bytes - the data that normally would be coming from memory.
      isBigEndian - true for BigEndian, false for LittleEndian.

    • ByteMemBufferImpl

      public ByteMemBufferImpl(Memory memory, Address addr, byte[] bytes, boolean isBigEndian)
      Construct a ByteMemBufferImpl object
      Parameters:
      memory - the memory in case getMemory() is called to get associated things like address spaces
      addr - the address to associate with the bytes
      bytes - the data that normally would be coming from memory.
      isBigEndian - true for BigEndian, false for LittleEndian.

  • Method Details

    • getLength

      public int getLength()
      Get number of bytes contained within buffer
      Returns:
      byte count

    • getAddress

      public Address getAddress()
      Description copied from interface: MemBuffer
      Get the Address which corresponds to the offset 0.
      Specified by:
      getAddress in interface MemBuffer
      Returns:
      the current address of offset 0.

    • getByte

      public byte getByte(int offset) throws MemoryAccessException
      Description copied from interface: MemBuffer
      Get one byte from memory at the current position plus offset.
      Specified by:
      getByte in interface MemBuffer
      Parameters:
      offset - the displacement from the current position.
      Returns:
      the data at offset from the current position.
      Throws:
      MemoryAccessException - if memory cannot be read at the specified offset

    • getMemory

      public Memory getMemory()
      Description copied from interface: MemBuffer
      Get the Memory object actually used by the MemBuffer.
      Specified by:
      getMemory in interface MemBuffer
      Returns:
      the Memory used by this MemBuffer or null if not available.

    • getBytes

      public int getBytes(byte[] b, int offset)
      Description copied from interface: MemBuffer
      Reads b.length bytes from this memory buffer starting at the address of this memory buffer plus the given memoryBufferOffset from that position. The actual number of bytes may be fewer if bytes can't be read.
      Specified by:
      getBytes in interface MemBuffer
      Parameters:
      b - the buffer into which bytes will be placed
      offset - the offset in this memory buffer from which to start reading bytes.
      Returns:
      the number of bytes read which may be fewer than b.length if available bytes are exhausted or no bytes are available at the specified offset.

    • isBigEndian

      public boolean isBigEndian()
      Description copied from interface: MemBuffer
      Returns true if the underlying bytes are in big-endian order, false if they are little endian.
      Specified by:
      isBigEndian in interface MemBuffer
      Returns:
      true if the underlying bytes are in big-endian order, false if they are little endian.

    • getShort

      public short getShort(int offset) throws MemoryAccessException
      Description copied from interface: MemBuffer
      returns the short at the given offset, taking into account the endianness.
      Specified by:
      getShort in interface MemBuffer
      Parameters:
      offset - the offset from the membuffers origin (the address that it is set at)
      Returns:
      the short at the given offset, taking into account the endianness.
      Throws:
      MemoryAccessException - if a 2-byte short value cannot be read at the specified offset

    • getInt

      public int getInt(int offset) throws MemoryAccessException
      Description copied from interface: MemBuffer
      returns the int at the given offset, taking into account the endianness.
      Specified by:
      getInt in interface MemBuffer
      Parameters:
      offset - the offset from the membuffers origin (the address that it is set at)
      Returns:
      the int at the given offset, taking into account the endianness.
      Throws:
      MemoryAccessException - if a 4-byte integer value cannot be read at the specified offset

    • getLong

      public long getLong(int offset) throws MemoryAccessException
      Description copied from interface: MemBuffer
      returns the long at the given offset, taking into account the endianness.
      Specified by:
      getLong in interface MemBuffer
      Parameters:
      offset - the offset from the membuffers origin (the address that it is set at)
      Returns:
      the long at the given offset, taking into account the endianness.
      Throws:
      MemoryAccessException - if a 8-byte long value cannot be read at the specified offset

    • getBigInteger

      public BigInteger getBigInteger(int offset, int size, boolean signed) throws MemoryAccessException
      Description copied from interface: MemBuffer
      returns the value at the given offset, taking into account the endianness.
      Specified by:
      getBigInteger in interface MemBuffer
      Parameters:
      offset - the offset from the membuffers origin (the address that it is set at)
      size - the number of bytes to include in the value
      signed - true if value should be treated as a signed twos-compliment value.
      Returns:
      the value at the given offset, taking into account the endianness.
      Throws:
      MemoryAccessException - if the request size value cannot be read at the specified offset