Imported Upstream version 5.0.0.42

Former-commit-id: fd56571888259555122d8a0f58c68838229cea2b

external/linker/cecil/symbols/pdb/Microsoft.Cci.Pdb/PdbConstant.cs

@@ -0,0 +1,89 @@
+//-----------------------------------------------------------------------------
+//
+// Copyright (c) Microsoft. All rights reserved.
+// This code is licensed under the Microsoft Public License.
+// THIS CODE IS PROVIDED *AS IS* WITHOUT WARRANTY OF
+// ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING ANY
+// IMPLIED WARRANTIES OF FITNESS FOR A PARTICULAR
+// PURPOSE, MERCHANTABILITY, OR NON-INFRINGEMENT.
+//
+//-----------------------------------------------------------------------------
+using System;
+using System.Runtime.InteropServices;
+
+namespace Microsoft.Cci.Pdb {
+  internal class PdbConstant {
+    internal string name;
+    internal uint token;
+    internal object value;
+
+    internal PdbConstant(BitAccess bits) {
+      bits.ReadUInt32(out this.token);
+      byte tag1;
+      bits.ReadUInt8(out tag1);
+      byte tag2;
+      bits.ReadUInt8(out tag2);
+      if (tag2 == 0) {
+        this.value = tag1;
+      } else if (tag2 == 0x80) {
+        switch (tag1) {
+          case 0x00: //sbyte
+            sbyte sb;
+            bits.ReadInt8(out sb);
+            this.value = sb;
+            break;
+          case 0x01: //short
+            short s;
+            bits.ReadInt16(out s);
+            this.value = s;
+            break;
+          case 0x02: //ushort
+            ushort us;
+            bits.ReadUInt16(out us);
+            this.value = us;
+            break;
+          case 0x03: //int
+            int i;
+            bits.ReadInt32(out i);
+            this.value = i;
+            break;
+          case 0x04: //uint
+            uint ui;
+            bits.ReadUInt32(out ui);
+            this.value = ui;
+            break;
+          case 0x05: //float
+            this.value = bits.ReadFloat();
+            break;
+          case 0x06: //double
+            this.value = bits.ReadDouble();
+            break;
+          case 0x09: //long
+            long sl;
+            bits.ReadInt64(out sl);
+            this.value = sl;
+            break;
+          case 0x0a: //ulong
+            ulong ul;
+            bits.ReadUInt64(out ul);
+            this.value = ul;
+            break;
+          case 0x10: //string
+            string str;
+            bits.ReadBString(out str);
+            this.value = str;
+            break;
+          case 0x19: //decimal
+            this.value = bits.ReadDecimal();
+            break;
+          default:
+            //TODO: error
+            break;
+        }
+      } else {
+        //TODO: error
+      }
+      bits.ReadCString(out name);
+    }
+  }
+}