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using System;
namespace Mono.Debugger
{
// <summary>
// This is a generic binary reader.
// </summary>
[Serializable]
public class TargetBinaryReader : TargetBinaryAccess
{
public TargetBinaryReader (byte[] contents, TargetMemoryInfo target_info)
: base (new TargetBlob (contents, target_info))
{ }
public TargetBinaryReader (TargetBlob blob)
: base (blob)
{
}
public byte PeekByte (long pos)
{
return blob.Contents[pos];
}
public byte PeekByte ()
{
return blob.Contents[pos];
}
public byte ReadByte ()
{
return blob.Contents[pos++];
}
public sbyte PeekSByte ()
{
return (sbyte) blob.Contents[pos];
}
public sbyte ReadSByte ()
{
return (sbyte) blob.Contents[pos++];
}
public short PeekInt16 (long pos)
{
if (swap)
return ((short) (blob.Contents[pos+1] |
(blob.Contents[pos] << 8)));
else
return ((short) (blob.Contents[pos] |
(blob.Contents[pos+1] << 8)));
}
public short PeekInt16 ()
{
return PeekInt16 (pos);
}
public short ReadInt16 ()
{
short retval = PeekInt16 (pos);
pos += 2;
return retval;
}
public int PeekInt32 (long pos)
{
if (swap)
return (blob.Contents[pos+3] |
(blob.Contents[pos+2] << 8) |
(blob.Contents[pos+1] << 16) |
(blob.Contents[pos] << 24));
else
return (blob.Contents[pos] |
(blob.Contents[pos+1] << 8) |
(blob.Contents[pos+2] << 16) |
(blob.Contents[pos+3] << 24));
}
public int PeekInt32 ()
{
return PeekInt32 (pos);
}
public int ReadInt32 ()
{
int retval = PeekInt32 (pos);
pos += 4;
return retval;
}
public uint PeekUInt32 (long pos)
{
if (swap)
return ((uint) blob.Contents[pos+3] |
((uint) blob.Contents[pos+2] << 8) |
((uint) blob.Contents[pos+1] << 16) |
((uint) blob.Contents[pos] << 24));
else
return ((uint) blob.Contents[pos] |
((uint) blob.Contents[pos+1] << 8) |
((uint) blob.Contents[pos+2] << 16) |
((uint) blob.Contents[pos+3] << 24));
}
public uint PeekUInt32 ()
{
return PeekUInt32 (pos);
}
public uint ReadUInt32 ()
{
uint retval = PeekUInt32 (pos);
pos += 4;
return retval;
}
public long PeekInt64 (long pos)
{
uint ret_low, ret_high;
if (swap) {
ret_low = (uint) (blob.Contents[pos+7] |
(blob.Contents[pos+6] << 8) |
(blob.Contents[pos+5] << 16) |
(blob.Contents[pos+4] << 24));
ret_high = (uint) (blob.Contents[pos+3] |
(blob.Contents[pos+2] << 8) |
(blob.Contents[pos+1] << 16) |
(blob.Contents[pos] << 24));
} else {
ret_low = (uint) (blob.Contents[pos] |
(blob.Contents[pos+1] << 8) |
(blob.Contents[pos+2] << 16) |
(blob.Contents[pos+3] << 24));
ret_high = (uint) (blob.Contents[pos+4] |
(blob.Contents[pos+5] << 8) |
(blob.Contents[pos+6] << 16) |
(blob.Contents[pos+7] << 24));
}
return (long) ((((ulong) ret_high) << 32) | ret_low);
}
public long PeekInt64 ()
{
return PeekInt64 (pos);
}
public long ReadInt64 ()
{
long retval = PeekInt64 (pos);
pos += 8;
return retval;
}
public long PeekAddress (long pos)
{
if (AddressSize == 8)
return PeekInt64 (pos);
else
return PeekUInt32 (pos);
}
public long PeekAddress ()
{
return PeekAddress (pos);
}
public long ReadAddress ()
{
if (AddressSize == 8)
return ReadInt64 ();
else
return ReadUInt32 ();
}
public TargetAddress ReadTargetAddress ()
{
return new TargetAddress (TargetMemoryInfo.AddressDomain, ReadAddress ());
}
public string PeekString (long pos)
{
int length = 0;
while (blob.Contents[pos+length] != 0)
length++;
char[] retval = new char [length];
for (int i = 0; i < length; i++)
retval [i] = (char) blob.Contents[pos+i];
return new String (retval);
}
public string PeekString ()
{
return PeekString (pos);
}
public string ReadString ()
{
string retval = PeekString (pos);
pos += retval.Length + 1;
return retval;
}
public byte[] PeekBuffer (long offset, int size)
{
byte[] buffer = new byte [size];
Array.Copy (blob.Contents, (int) offset, buffer, 0, size);
return buffer;
}
public byte[] PeekBuffer (int size)
{
return PeekBuffer (pos, size);
}
public byte[] ReadBuffer (int size)
{
byte[] buffer = new byte [size];
Array.Copy (blob.Contents, pos, buffer, 0, size);
pos += size;
return buffer;
}
public int PeekLeb128 (long pos)
{
int size;
return PeekLeb128 (pos, out size);
}
public int PeekLeb128 (long pos, out int size)
{
int ret = 0;
int shift = 0;
byte b;
size = 0;
do {
b = PeekByte (pos + size);
size++;
ret = ret | ((b & 0x7f) << shift);
shift += 7;
} while ((b & 0x80) == 0x80);
return ret;
}
public int ReadLeb128 ()
{
int size;
int retval = PeekLeb128 (pos, out size);
pos += size;
return retval;
}
public int PeekSLeb128 (long pos)
{
int size;
return PeekSLeb128 (pos, out size);
}
public int PeekSLeb128 (long pos, out int size)
{
int ret = 0;
int shift = 0;
byte b;
size = 0;
do {
b = (byte) PeekByte (pos + size);
size++;
ret = ret | ((b & 0x7f) << shift);
shift += 7;
} while ((b & 0x80) == 0x80);
if ((shift < 31) && ((b & 0x40) == 0x40))
ret |= - (1 << shift);
return ret;
}
public int ReadSLeb128 ()
{
int size;
int retval = PeekSLeb128 (pos, out size);
pos += size;
return retval;
}
public long ReadInteger (int size)
{
switch (size) {
case 1:
return ReadByte ();
case 2:
return ReadInt16 ();
case 4:
return ReadInt32 ();
case 8:
return ReadInt64 ();
default:
throw new TargetMemoryException (
"Unknown integer size " + size);
}
}
}
}
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