private bool EvalChar(Interpreter.Mode mode, ref int ptr, ref int pc, bool multi)
{
bool flag = false;
char c = '\0';
bool flag3;
for (;;)
{
ushort num = this.program[pc];
OpCode opCode = (OpCode)(num & 255);
OpFlags opFlags = (OpFlags)(num & 65280);
pc++;
bool flag2 = (ushort)(opFlags & OpFlags.IgnoreCase) != 0;
if (!flag)
{
if ((ushort)(opFlags & OpFlags.RightToLeft) != 0)
{
if (ptr <= 0)
{
break;
}
c = this.text[--ptr];
}
else
{
if (ptr >= this.text_end)
{
return(false);
}
c = this.text[ptr++];
}
if (flag2)
{
c = char.ToLower(c);
}
flag = true;
}
flag3 = ((ushort)(opFlags & OpFlags.Negate) != 0);
switch (opCode)
{
case OpCode.False:
return(false);
case OpCode.True:
return(true);
case OpCode.Character:
if (c == (char)this.program[pc++])
{
goto Block_7;
}
break;
case OpCode.Category:
if (CategoryUtils.IsCategory((Category)this.program[pc++], c))
{
goto Block_8;
}
break;
case OpCode.NotCategory:
if (!CategoryUtils.IsCategory((Category)this.program[pc++], c))
{
goto Block_9;
}
break;
case OpCode.Range:
{
int num2 = (int)this.program[pc++];
int num3 = (int)this.program[pc++];
if (num2 <= (int)c && (int)c <= num3)
{
goto Block_11;
}
break;
}
case OpCode.Set:
{
int num4 = (int)this.program[pc++];
int num5 = (int)this.program[pc++];
int num6 = pc;
pc += num5;
int num7 = (int)c - num4;
if (num7 >= 0 && num7 < num5 << 4)
{
if (((int)this.program[num6 + (num7 >> 4)] & 1 << (num7 & 15)) != 0)
{
goto Block_13;
}
}
break;
}
}
if (!multi)
{
return(flag3);
}
}
return(false);
Block_7:
return(!flag3);
Block_8:
return(!flag3);
Block_9:
return(!flag3);
Block_11:
return(!flag3);
Block_13:
return(!flag3);
}
private bool Eval(Interpreter.Mode mode, ref int ref_ptr, int pc)
{
int num = ref_ptr;
Interpreter.RepeatContext repeatContext;
int start;
int count;
for (;;)
{
OpFlags opFlags;
for (;;)
{
ushort num2 = this.program[pc];
OpCode opCode = (OpCode)(num2 & 255);
opFlags = (OpFlags)(num2 & 65280);
switch (opCode)
{
case OpCode.False:
goto IL_4B8;
case OpCode.True:
goto IL_4BD;
case OpCode.Position:
if (!this.IsPosition((Position)this.program[pc + 1], num))
{
goto Block_44;
}
pc += 2;
break;
case OpCode.String:
{
bool flag = (ushort)(opFlags & OpFlags.RightToLeft) != 0;
bool flag2 = (ushort)(opFlags & OpFlags.IgnoreCase) != 0;
int num3 = (int)this.program[pc + 1];
if (flag)
{
num -= num3;
if (num < 0)
{
goto Block_46;
}
}
else if (num + num3 > this.text_end)
{
goto Block_47;
}
pc += 2;
for (int i = 0; i < num3; i++)
{
char c = this.text[num + i];
if (flag2)
{
c = char.ToLower(c);
}
if (c != (char)this.program[pc++])
{
goto Block_49;
}
}
if (!flag)
{
num += num3;
}
break;
}
case OpCode.Reference:
{
bool flag3 = (ushort)(opFlags & OpFlags.RightToLeft) != 0;
bool flag4 = (ushort)(opFlags & OpFlags.IgnoreCase) != 0;
int lastDefined = this.GetLastDefined((int)this.program[pc + 1]);
if (lastDefined < 0)
{
goto Block_52;
}
int index = this.marks[lastDefined].Index;
int length = this.marks[lastDefined].Length;
if (flag3)
{
num -= length;
if (num < 0)
{
goto Block_54;
}
}
else if (num + length > this.text_end)
{
goto Block_55;
}
pc += 2;
if (flag4)
{
for (int j = 0; j < length; j++)
{
if (char.ToLower(this.text[num + j]) != char.ToLower(this.text[index + j]))
{
goto Block_57;
}
}
}
else
{
for (int k = 0; k < length; k++)
{
if (this.text[num + k] != this.text[index + k])
{
goto Block_59;
}
}
}
if (!flag3)
{
num += length;
}
break;
}
case OpCode.Character:
case OpCode.Category:
case OpCode.NotCategory:
case OpCode.Range:
case OpCode.Set:
if (!this.EvalChar(mode, ref num, ref pc, false))
{
goto Block_61;
}
break;
case OpCode.In:
{
int num4 = pc + (int)this.program[pc + 1];
pc += 2;
if (!this.EvalChar(mode, ref num, ref pc, true))
{
goto Block_62;
}
pc = num4;
break;
}
case OpCode.Open:
this.Open((int)this.program[pc + 1], num);
pc += 2;
break;
case OpCode.Close:
this.Close((int)this.program[pc + 1], num);
pc += 2;
break;
case OpCode.Balance:
goto IL_7DB;
case OpCode.BalanceStart:
{
int ptr = num;
if (!this.Eval(Interpreter.Mode.Match, ref num, pc + 5))
{
goto Block_63;
}
if (!this.Balance((int)this.program[pc + 1], (int)this.program[pc + 2], this.program[pc + 3] == 1, ptr))
{
goto Block_65;
}
pc += (int)this.program[pc + 4];
break;
}
case OpCode.IfDefined:
{
int lastDefined2 = this.GetLastDefined((int)this.program[pc + 2]);
if (lastDefined2 < 0)
{
pc += (int)this.program[pc + 1];
}
else
{
pc += 3;
}
break;
}
case OpCode.Sub:
if (!this.Eval(Interpreter.Mode.Match, ref num, pc + 2))
{
goto Block_67;
}
pc += (int)this.program[pc + 1];
break;
case OpCode.Test:
{
int cp = this.Checkpoint();
int num5 = num;
if (this.Eval(Interpreter.Mode.Match, ref num5, pc + 3))
{
pc += (int)this.program[pc + 1];
}
else
{
this.Backtrack(cp);
pc += (int)this.program[pc + 2];
}
break;
}
case OpCode.Branch:
goto IL_88A;
case OpCode.Jump:
pc += (int)this.program[pc + 1];
break;
case OpCode.Repeat:
goto IL_8EE;
case OpCode.Until:
goto IL_957;
case OpCode.FastRepeat:
goto IL_C6F;
case OpCode.Anchor:
goto IL_96;
case OpCode.Info:
goto IL_FE9;
}
}
for (;;)
{
IL_88A:
int cp2 = this.Checkpoint();
if (this.Eval(Interpreter.Mode.Match, ref num, pc + 2))
{
break;
}
this.Backtrack(cp2);
pc += (int)this.program[pc + 1];
if ((this.program[pc] & 255) == 0)
{
goto Block_70;
}
}
IL_FF3:
ref_ptr = num;
if (mode == Interpreter.Mode.Match)
{
return(true);
}
if (mode != Interpreter.Mode.Count)
{
break;
}
this.fast.Count++;
if (this.fast.IsMaximum || (this.fast.IsLazy && this.fast.IsMinimum))
{
return(true);
}
pc = this.fast.Expression;
continue;
IL_96:
int num6 = (int)this.program[pc + 1];
int num7 = (int)this.program[pc + 2];
bool flag5 = (ushort)(opFlags & OpFlags.RightToLeft) != 0;
int num8 = (!flag5) ? (num + num7) : (num - num7);
int num9 = this.text_end - this.match_min + num7;
int num10 = 0;
OpCode opCode2 = (OpCode)(this.program[pc + 3] & 255);
if (opCode2 == OpCode.Position && num6 == 6)
{
switch (this.program[pc + 4])
{
case 2:
if (flag5 || num7 == 0)
{
if (flag5)
{
num = num7;
}
if (this.TryMatch(ref num, pc + num6))
{
goto IL_FF3;
}
}
break;
case 3:
if (num8 == 0)
{
num = 0;
if (this.TryMatch(ref num, pc + num6))
{
goto IL_FF3;
}
num8++;
}
while ((flag5 && num8 >= 0) || (!flag5 && num8 <= num9))
{
if (num8 == 0 || this.text[num8 - 1] == '\n')
{
if (flag5)
{
num = ((num8 != num9) ? (num8 + num7) : num8);
}
else
{
num = ((num8 != 0) ? (num8 - num7) : num8);
}
if (this.TryMatch(ref num, pc + num6))
{
goto IL_FF3;
}
}
if (flag5)
{
num8--;
}
else
{
num8++;
}
}
break;
case 4:
if (num8 == this.scan_ptr)
{
num = ((!flag5) ? (this.scan_ptr - num7) : (this.scan_ptr + num7));
if (this.TryMatch(ref num, pc + num6))
{
goto IL_FF3;
}
}
break;
}
break;
}
if (this.qs != null || (opCode2 == OpCode.String && num6 == (int)(6 + this.program[pc + 4])))
{
bool flag6 = (this.program[pc + 3] & 1024) != 0;
if (this.qs == null)
{
bool ignore = (this.program[pc + 3] & 512) != 0;
string @string = this.GetString(pc + 3);
this.qs = new QuickSearch(@string, ignore, flag6);
}
while ((flag5 && num8 >= num10) || (!flag5 && num8 <= num9))
{
if (flag6)
{
num8 = this.qs.Search(this.text, num8, num10);
if (num8 != -1)
{
num8 += this.qs.Length;
}
}
else
{
num8 = this.qs.Search(this.text, num8, num9);
}
if (num8 < 0)
{
break;
}
num = ((!flag6) ? (num8 - num7) : (num8 + num7));
if (this.TryMatch(ref num, pc + num6))
{
goto IL_FF3;
}
if (flag6)
{
num8 -= 2;
}
else
{
num8++;
}
}
break;
}
if (opCode2 == OpCode.True)
{
while ((flag5 && num8 >= num10) || (!flag5 && num8 <= num9))
{
num = num8;
if (this.TryMatch(ref num, pc + num6))
{
goto IL_FF3;
}
if (flag5)
{
num8--;
}
else
{
num8++;
}
}
break;
}
while ((flag5 && num8 >= num10) || (!flag5 && num8 <= num9))
{
num = num8;
if (this.Eval(Interpreter.Mode.Match, ref num, pc + 3))
{
num = ((!flag5) ? (num8 - num7) : (num8 + num7));
if (this.TryMatch(ref num, pc + num6))
{
goto IL_FF3;
}
}
if (flag5)
{
num8--;
}
else
{
num8++;
}
}
break;
IL_4BD:
IL_7DB:
goto IL_FF3;
IL_8EE:
this.repeat = new Interpreter.RepeatContext(this.repeat, this.ReadProgramCount(pc + 2), this.ReadProgramCount(pc + 4), (ushort)(opFlags & OpFlags.Lazy) != 0, pc + 6);
if (this.Eval(Interpreter.Mode.Match, ref num, pc + (int)this.program[pc + 1]))
{
goto IL_FF3;
}
goto IL_941;
IL_957:
repeatContext = this.repeat;
if (this.deep == repeatContext)
{
goto IL_FF3;
}
start = repeatContext.Start;
count = repeatContext.Count;
while (!repeatContext.IsMinimum)
{
repeatContext.Count++;
repeatContext.Start = num;
this.deep = repeatContext;
if (!this.Eval(Interpreter.Mode.Match, ref num, repeatContext.Expression))
{
goto Block_73;
}
if (this.deep != repeatContext)
{
goto IL_FF3;
}
}
if (num == repeatContext.Start)
{
this.repeat = repeatContext.Previous;
this.deep = null;
if (this.Eval(Interpreter.Mode.Match, ref num, pc + 1))
{
goto IL_FF3;
}
goto IL_A28;
}
else
{
if (repeatContext.IsLazy)
{
for (;;)
{
this.repeat = repeatContext.Previous;
this.deep = null;
int cp3 = this.Checkpoint();
if (this.Eval(Interpreter.Mode.Match, ref num, pc + 1))
{
break;
}
this.Backtrack(cp3);
this.repeat = repeatContext;
if (repeatContext.IsMaximum)
{
goto Block_80;
}
repeatContext.Count++;
repeatContext.Start = num;
this.deep = repeatContext;
if (!this.Eval(Interpreter.Mode.Match, ref num, repeatContext.Expression))
{
goto Block_81;
}
if (this.deep != repeatContext)
{
break;
}
if (num == repeatContext.Start)
{
goto Block_83;
}
}
goto IL_FF3;
}
int count2 = this.stack.Count;
while (!repeatContext.IsMaximum)
{
int num11 = this.Checkpoint();
int value = num;
int start2 = repeatContext.Start;
repeatContext.Count++;
repeatContext.Start = num;
this.deep = repeatContext;
if (!this.Eval(Interpreter.Mode.Match, ref num, repeatContext.Expression))
{
repeatContext.Count--;
repeatContext.Start = start2;
this.Backtrack(num11);
break;
}
if (this.deep != repeatContext)
{
this.stack.Count = count2;
goto IL_FF3;
}
this.stack.Push(num11);
this.stack.Push(value);
if (num == repeatContext.Start)
{
break;
}
}
this.repeat = repeatContext.Previous;
for (;;)
{
this.deep = null;
if (this.Eval(Interpreter.Mode.Match, ref num, pc + 1))
{
break;
}
if (this.stack.Count == count2)
{
goto Block_88;
}
repeatContext.Count--;
num = this.stack.Pop();
this.Backtrack(this.stack.Pop());
}
this.stack.Count = count2;
goto IL_FF3;
}
IL_C6F:
this.fast = new Interpreter.RepeatContext(this.fast, this.ReadProgramCount(pc + 2), this.ReadProgramCount(pc + 4), (ushort)(opFlags & OpFlags.Lazy) != 0, pc + 6);
this.fast.Start = num;
int cp4 = this.Checkpoint();
pc += (int)this.program[pc + 1];
ushort num12 = this.program[pc];
int num13 = -1;
int num14 = -1;
int num15 = 0;
OpCode opCode3 = (OpCode)(num12 & 255);
if (opCode3 == OpCode.Character || opCode3 == OpCode.String)
{
OpFlags opFlags2 = (OpFlags)(num12 & 65280);
if ((ushort)(opFlags2 & OpFlags.Negate) == 0)
{
if (opCode3 == OpCode.String)
{
int num16 = 0;
if ((ushort)(opFlags2 & OpFlags.RightToLeft) != 0)
{
num16 = (int)(this.program[pc + 1] - 1);
}
num13 = (int)this.program[pc + 2 + num16];
}
else
{
num13 = (int)this.program[pc + 1];
}
if ((ushort)(opFlags2 & OpFlags.IgnoreCase) != 0)
{
num14 = (int)char.ToUpper((char)num13);
}
else
{
num14 = num13;
}
if ((ushort)(opFlags2 & OpFlags.RightToLeft) != 0)
{
num15 = -1;
}
else
{
num15 = 0;
}
}
}
if (this.fast.IsLazy)
{
if (!this.fast.IsMinimum && !this.Eval(Interpreter.Mode.Count, ref num, this.fast.Expression))
{
goto Block_97;
}
for (;;)
{
int num17 = num + num15;
if (num13 < 0 || (num17 >= 0 && num17 < this.text_end && (num13 == (int)this.text[num17] || num14 == (int)this.text[num17])))
{
this.deep = null;
if (this.Eval(Interpreter.Mode.Match, ref num, pc))
{
break;
}
}
if (this.fast.IsMaximum)
{
goto Block_103;
}
this.Backtrack(cp4);
if (!this.Eval(Interpreter.Mode.Count, ref num, this.fast.Expression))
{
goto Block_104;
}
}
this.fast = this.fast.Previous;
goto IL_FF3;
}
else
{
if (!this.Eval(Interpreter.Mode.Count, ref num, this.fast.Expression))
{
goto Block_105;
}
int num18;
if (this.fast.Count > 0)
{
num18 = (num - this.fast.Start) / this.fast.Count;
}
else
{
num18 = 0;
}
for (;;)
{
int num19 = num + num15;
if (num13 < 0 || (num19 >= 0 && num19 < this.text_end && (num13 == (int)this.text[num19] || num14 == (int)this.text[num19])))
{
this.deep = null;
if (this.Eval(Interpreter.Mode.Match, ref num, pc))
{
break;
}
}
this.fast.Count--;
if (!this.fast.IsMinimum)
{
goto Block_112;
}
num -= num18;
this.Backtrack(cp4);
}
this.fast = this.fast.Previous;
goto IL_FF3;
}
}
IL_4B8:
Block_44:
Block_46:
Block_47:
Block_49:
Block_52:
Block_54:
Block_55:
Block_57:
Block_59:
Block_61:
Block_62:
Block_63:
Block_65:
Block_67:
Block_70:
goto IL_1067;
IL_941:
this.repeat = this.repeat.Previous;
goto IL_1067;
Block_73:
repeatContext.Start = start;
repeatContext.Count = count;
goto IL_1067;
IL_A28:
this.repeat = repeatContext;
Block_80:
goto IL_1067;
Block_81:
repeatContext.Start = start;
repeatContext.Count = count;
Block_83:
goto IL_1067;
Block_88:
this.repeat = repeatContext;
goto IL_1067;
Block_97:
this.fast = this.fast.Previous;
goto IL_1067;
Block_103:
this.fast = this.fast.Previous;
goto IL_1067;
Block_104:
this.fast = this.fast.Previous;
goto IL_1067;
Block_105:
this.fast = this.fast.Previous;
goto IL_1067;
Block_112:
this.fast = this.fast.Previous;
IL_FE9:
IL_1067:
if (mode == Interpreter.Mode.Match)
{
return(false);
}
if (mode != Interpreter.Mode.Count)
{
return(false);
}
if (!this.fast.IsLazy && this.fast.IsMinimum)
{
return(true);
}
ref_ptr = this.fast.Start;
return(false);
}
