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using System;
using System.Text;
using Mono.Debugger.Backend;
namespace Mono.Debugger.Languages.Native
{
internal class NativeStringObject : TargetFundamentalObject
{
public NativeStringObject (NativeStringType type, TargetLocation location)
: base (type, location)
{ }
protected int MaximumDynamicSize {
get {
return NativeStringType.MaximumStringLength;
}
}
public static int ChunkSize {
get {
return 16;
}
}
protected override object DoGetObject (TargetMemoryAccess target)
{
try {
return ReadString (target, Location);
} catch (TargetException ex) {
throw new LocationInvalidException (ex);
}
}
static char[] hex_chars = { '0', '1', '2', '3', '4', '5', '6', '7',
'8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
protected string ReadString (TargetMemoryAccess target, TargetLocation start)
{
if (start.HasAddress && start.GetAddress (target).IsNull)
return "null";
StringBuilder sb = new StringBuilder ();
bool done = false;
int offset = 0;
while (!done && (offset < MaximumDynamicSize)) {
TargetLocation location = start.GetLocationAtOffset (offset);
byte[] buffer = location.ReadBuffer (target, ChunkSize);
int pos = 0;
int size = buffer.Length;
char[] char_buffer = new char [size * 3];
for (int i = 0; i < size; i++) {
if (buffer [i] == 0) {
done = true;
break;
}
char ch = (char) buffer [i];
if (Char.IsLetterOrDigit (ch) || Char.IsPunctuation (ch) ||
Char.IsWhiteSpace (ch) || (ch == '<') || (ch == '>'))
char_buffer [pos++] = ch;
else if (ch == '\\') {
char_buffer [pos++] = '\\';
char_buffer [pos++] = '\\';
} else if ((ch == '\'') || (ch == '`')) {
char_buffer [pos++] = ch;
} else {
char_buffer [pos++] = '\\';
char_buffer [pos++] = hex_chars [(ch & 0xf0) >> 4];
char_buffer [pos++] = hex_chars [ch & 0x0f];
}
}
string str = new String (char_buffer, 0, pos);
sb.Append (str);
offset += size;
}
return sb.ToString ();
}
}
}
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