public override StringMangleStackTop?Emit(IStringMangleContext context)
{
var emitter = context.Emitter;
var fr = new FeatureRequest(Context, emitter);
using (var r = fr.Enter(context.SourceMethod))
if (r != null)
{
ValueDemangler cdm;
do
{
cdm = _demanglers.RandomElementOrDefault(Mangler.Rng);
} while (fr.IsOnStack(cdm.Method.Method));
var part = context.Pieces.Dequeue();
using (emitter.UseTempLocal(cdm.Method.Type.TypeMapping.Target.ToTypeSig(), out var instance))
{
cdm.EmitNew(emitter, Mangler.Rng, instance);
var mangledPart = cdm.Codec.Mangle(part.Value);
Debug.Assert(Equals(cdm.Codec.Demangle(mangledPart), part.Value));
cdm.EmitCall(emitter, Mangler.Rng, instance, mangledPart);
}
return(StringMangleStackTop.String);
}
return(null);
}
public override StringMangleStackTop?Emit(IStringMangleContext context)
{
var emitter = context.Emitter;
var part = context.Pieces.Dequeue();
emitter.Const(part.Value);
return(StringMangleStackTop.String);
}
public static StringMangleStackTop Int2String(IStringMangleContext context, int len, int bits, bool be)
{
Debug.Assert(len * bits <= 32);
var emitter = context.Emitter;
using (emitter.UseTempLocal <int>(out var encVar))
{
var uni = bits > 8;
var step = uni ? 16 : 8;
var shift = be ? 32 : 0;
var mask = uni ? 0xffff : 0xff;
emitter.Stloc(encVar);
context.EnsureStringBuilderOnStackTop();
for (var i = 0; i < len; i++)
{
emitter.Ldloc(encVar);
if (be)
{
shift -= step;
if (shift > 0)
{
emitter.Const(shift).Emit(OpCodes.Shr_Un);
}
}
else
{
if (shift > 0)
{
emitter.Const(shift).Emit(OpCodes.Shr_Un);
}
shift += step;
}
emitter.Const(mask).Emit(OpCodes.And).Emit(OpCodes.Conv_U2);
emitter.Callvirt(Method_StringBuilder_Append_Char);
}
}
return(StringMangleStackTop.StringBuilder);
}
public override StringMangleStackTop?Emit(IStringMangleContext context)
{
var part = context.Pieces.Peek();
if (part.Bits * part.Value.Length > 32)
{
return(null);
}
var emitter = context.Emitter;
var fr = new FeatureRequest(Context, emitter);
using (var r = fr.Enter(context.SourceMethod))
if (r != null)
{
part = context.Pieces.Dequeue();
var be = context.Mangler.Rng.NextBoolean();
var i = SmUtils.String2Int(part.Value, part.Bits, be);
Context.IntMangler().Emit(fr, i);
return(SmUtils.Int2String(context, part.Value.Length, part.Bits,
be));
}
return(null);
}
public abstract StringMangleStackTop?Emit(IStringMangleContext context);
