| static private Prepare ( byte buffer, int &idx, int size, bool &align ) : bool | ||
| buffer | byte | |
| idx | int | |
| size | int | |
| align | bool | |
| return | bool | |
static bool Prepare (byte [] buffer, ref int idx, int size, ref bool align)
{
if (align){
idx = Align (idx, size);
align = false;
}
if (idx + size >= buffer.Length){
idx = buffer.Length;
return false;
}
return true;
}
public static IList Unpack(string description, byte[] buffer, int startIndex)
{
DataConverter dataConverter = DataConverter.CopyConv;
ArrayList arrayList = new ArrayList();
int num = startIndex;
bool flag = false;
int num2 = 0;
int num3 = 0;
while (num3 < description.Length && num < buffer.Length)
{
int num4 = num3;
char c = description[num3];
switch (c)
{
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
num2 = (int)((short)description[num3] - 48);
num4 = num3 + 1;
break;
default:
switch (c)
{
case '[':
{
int num5 = -1;
int i;
for (i = num3 + 1; i < description.Length; i++)
{
if (description[i] == ']')
{
break;
}
int num6 = (int)((short)description[i] - 48);
if (num6 >= 0 && num6 <= 9)
{
if (num5 == -1)
{
num5 = num6;
}
else
{
num5 = num5 * 10 + num6;
}
}
}
if (num5 == -1)
{
throw new ArgumentException("invalid size specification");
}
num3 = i;
num2 = num5;
break;
}
default:
{
switch (c)
{
case '!':
flag = true;
goto IL_683;
default:
switch (c)
{
case 'I':
if (DataConverter.Prepare(buffer, ref num, 4, ref flag))
{
arrayList.Add(dataConverter.GetUInt32(buffer, num));
num += 4;
}
goto IL_683;
default:
switch (c)
{
case 'x':
num++;
goto IL_683;
default:
if (c == '*')
{
num2 = int.MaxValue;
goto IL_683;
}
if (c == 'S')
{
if (DataConverter.Prepare(buffer, ref num, 2, ref flag))
{
arrayList.Add(dataConverter.GetUInt16(buffer, num));
num += 2;
}
goto IL_683;
}
if (c != 's')
{
throw new ArgumentException(string.Format("invalid format specified `{0}'", description[num3]));
}
if (DataConverter.Prepare(buffer, ref num, 2, ref flag))
{
arrayList.Add(dataConverter.GetInt16(buffer, num));
num += 2;
}
goto IL_683;
case 'z':
break;
}
break;
case 'L':
if (DataConverter.Prepare(buffer, ref num, 8, ref flag))
{
arrayList.Add(dataConverter.GetUInt64(buffer, num));
num += 8;
}
goto IL_683;
}
break;
case '$':
break;
case '%':
dataConverter = DataConverter.Native;
goto IL_683;
}
num3++;
if (num3 >= description.Length)
{
throw new ArgumentException("$ description needs a type specified", "description");
}
char c2 = description[num3];
if (flag)
{
num = DataConverter.Align(num, 4);
flag = false;
}
if (num < buffer.Length)
{
char c3 = c2;
int num6;
Encoding encoding;
switch (c3)
{
case '3':
encoding = Encoding.GetEncoding(12000);
num6 = 4;
break;
case '4':
encoding = Encoding.GetEncoding(12001);
num6 = 4;
break;
default:
if (c3 != 'b')
{
throw new ArgumentException("Invalid format for $ specifier", "description");
}
encoding = Encoding.BigEndianUnicode;
num6 = 2;
break;
case '6':
encoding = Encoding.Unicode;
num6 = 2;
break;
case '7':
encoding = Encoding.UTF7;
num6 = 1;
break;
case '8':
encoding = Encoding.UTF8;
num6 = 1;
break;
}
int j = num;
switch (num6)
{
case 1:
while (j < buffer.Length && buffer[j] != 0)
{
j++;
}
arrayList.Add(encoding.GetChars(buffer, num, j - num));
if (j == buffer.Length)
{
num = j;
}
else
{
num = j + 1;
}
break;
case 2:
while (j < buffer.Length)
{
if (j + 1 == buffer.Length)
{
j++;
break;
}
if (buffer[j] == 0 && buffer[j + 1] == 0)
{
break;
}
j++;
}
arrayList.Add(encoding.GetChars(buffer, num, j - num));
if (j == buffer.Length)
{
num = j;
}
else
{
num = j + 2;
}
break;
case 4:
while (j < buffer.Length)
{
if (j + 3 >= buffer.Length)
{
j = buffer.Length;
break;
}
if (buffer[j] == 0 && buffer[j + 1] == 0 && buffer[j + 2] == 0 && buffer[j + 3] == 0)
{
break;
}
j++;
}
arrayList.Add(encoding.GetChars(buffer, num, j - num));
if (j == buffer.Length)
{
num = j;
}
else
{
num = j + 4;
}
break;
}
}
break;
}
case '^':
dataConverter = DataConverter.BigEndian;
break;
case '_':
dataConverter = DataConverter.LittleEndian;
break;
case 'b':
if (DataConverter.Prepare(buffer, ref num, 1, ref flag))
{
arrayList.Add(buffer[num]);
num++;
}
break;
case 'c':
goto IL_300;
case 'd':
if (DataConverter.Prepare(buffer, ref num, 8, ref flag))
{
arrayList.Add(dataConverter.GetDouble(buffer, num));
num += 8;
}
break;
case 'f':
if (DataConverter.Prepare(buffer, ref num, 4, ref flag))
{
arrayList.Add(dataConverter.GetDouble(buffer, num));
num += 4;
}
break;
case 'i':
if (DataConverter.Prepare(buffer, ref num, 4, ref flag))
{
arrayList.Add(dataConverter.GetInt32(buffer, num));
num += 4;
}
break;
case 'l':
if (DataConverter.Prepare(buffer, ref num, 8, ref flag))
{
arrayList.Add(dataConverter.GetInt64(buffer, num));
num += 8;
}
break;
}
break;
case 'C':
goto IL_300;
}
IL_683:
if (num2 > 0)
{
if (--num2 > 0)
{
num3 = num4;
}
continue;
}
num3++;
continue;
IL_300:
if (DataConverter.Prepare(buffer, ref num, 1, ref flag))
{
char c4;
if (description[num3] == 'c')
{
c4 = (char)((sbyte)buffer[num]);
}
else
{
c4 = (char)buffer[num];
}
arrayList.Add(c4);
num++;
}
goto IL_683;
}
return(arrayList);
}
