1 //
2 // Permission is hereby granted, free of charge, to any person obtaining
3 // a copy of this software and associated documentation files (the
4 // "Software"), to deal in the Software without restriction, including
5 // without limitation the rights to use, copy, modify, merge, publish,
6 // distribute, sublicense, and/or sell copies of the Software, and to
7 // permit persons to whom the Software is furnished to do so, subject to
8 // the following conditions:
9 //
10 // The above copyright notice and this permission notice shall be
11 // included in all copies or substantial portions of the Software.
12 //
13 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
14 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
15 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
16 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
17 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
18 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
19 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
20 //
21 // Copyright (C) Lluis Sanchez Gual, 2004
22 //
23 
24 #if !FULL_AOT_RUNTIME
25 using System;
26 using System.Collections;
27 using System.Reflection;
28 using System.Reflection.Emit;
29 
30 namespace Mono.CodeGeneration
31 {
32 	public class CodeSelect: CodeStatement
33 	{
34 		ArrayList conditions = new ArrayList ();
35 		ArrayList blocks = new ArrayList ();
36 
CodeSelect()37 		public CodeSelect ()
38 		{
39 		}
40 
AddCase(CodeExpression condition, CodeBlock block)41 		public void AddCase (CodeExpression condition, CodeBlock block)
42 		{
43 			conditions.Add (condition);
44 			blocks.Add (block);
45 		}
46 
Generate(ILGenerator gen)47 		public override void Generate (ILGenerator gen)
48 		{
49 			if (blocks.Count == 0) return;
50 
51 			CodeIf initialIf = new CodeIf ((CodeExpression)conditions[0]);
52 			initialIf.TrueBlock = (CodeBlock) blocks[0];
53 			CodeIf prevCif = initialIf;
54 
55 			for (int n=1; n<blocks.Count; n++) {
56 				CodeIf cif = new CodeIf ((CodeExpression)conditions[n]);
57 				cif.TrueBlock = (CodeBlock) blocks[n];
58 				CodeBlock cb = new CodeBlock ();
59 				cb.Add (cif);
60 				prevCif.FalseBlock = cb;
61 				prevCif = cif;
62 			}
63 
64 			initialIf.Generate (gen);
65 		}
66 
PrintCode(CodeWriter cp)67 		public override void PrintCode (CodeWriter cp)
68 		{
69 			for (int n=0; n<blocks.Count; n++) {
70 				if (n == 0)
71 					cp.Write ("if (");
72 				else
73 					cp.Write ("else if (");
74 
75 				((CodeExpression)conditions[n]).PrintCode (cp);
76 				cp.Write (") {");
77 				cp.EndLine ();
78 				cp.Indent ();
79 				((CodeBlock) blocks[n]).PrintCode (cp);
80 				cp.Unindent ();
81 				cp.BeginLine ().Write ("}");
82 				if (n < blocks.Count - 1) {
83 					cp.EndLine ();
84 					cp.BeginLine ();
85 				}
86 			}
87 		}
88 	}
89 }
90 #endif
91