1  using System;
 2  using System.IO;
 3  using System.Text;
 4  
 5  namespace Spv.Generator
 6  {
 7      public class LiteralString : IOperand, IEquatable<LiteralString>
 8      {
 9          public OperandType Type => OperandType.String;
10  
11          private readonly string _value;
12  
13          public LiteralString(string value)
14          {
15              _value = value;
16          }
17  
18          public ushort WordCount => (ushort)(_value.Length / 4 + 1);
19  
20          public void WriteOperand(BinaryWriter writer)
21          {
22              writer.Write(_value.AsSpan());
23  
24              // String must be padded to the word size (which is 4 bytes).
25              int paddingSize = 4 - (Encoding.ASCII.GetByteCount(_value) % 4);
26  
27              Span<byte> padding = stackalloc byte[paddingSize];
28  
29              writer.Write(padding);
30          }
31  
32          public override bool Equals(object obj)
33          {
34              return obj is LiteralString literalString && Equals(literalString);
35          }
36  
37          public bool Equals(LiteralString cmpObj)
38          {
39              return Type == cmpObj.Type && _value.Equals(cmpObj._value);
40          }
41  
42          public override int GetHashCode()
43          {
44              return DeterministicHashCode.Combine(Type, DeterministicHashCode.GetHashCode(_value));
45          }
46  
47          public bool Equals(IOperand obj)
48          {
49              return obj is LiteralString literalString && Equals(literalString);
50          }
51  
52          public override string ToString() => _value;
53      }
54  }