Final commit before changing layout

1 files changed, 130 insertions, 0 deletions

diff --git a/csharp/ProtoGen/FieldGeneratorBase.cs b/csharp/ProtoGen/FieldGeneratorBase.cs
new file mode 100644
index 00000000..9103e0c1
--- /dev/null
+++ b/csharp/ProtoGen/FieldGeneratorBase.cs
@@ -0,0 +1,130 @@
+using System;
+using Google.ProtocolBuffers.Descriptors;
+using System.Globalization;
+
+namespace Google.ProtocolBuffers.ProtoGen {
+  internal abstract class FieldGeneratorBase : SourceGeneratorBase<FieldDescriptor> {
+    protected FieldGeneratorBase(FieldDescriptor descriptor)
+        : base(descriptor) {
+    }
+
+    private static bool AllPrintableAscii(string text) {
+      foreach (char c in text) {
+        if (c < 0x20 || c > 0x7e) {
+          return false;
+        }
+      }
+      return true;
+    }
+
+    protected string DefaultValue {
+      get {
+        string suffix = "";
+        switch (Descriptor.FieldType) {
+          case FieldType.Float:  suffix = "F"; break;
+          case FieldType.Double: suffix = "D"; break;
+          case FieldType.Int64:  suffix = "L"; break;
+          case FieldType.UInt64: suffix = "UL"; break;
+        }
+        switch (Descriptor.FieldType) {
+          case FieldType.Float:
+          case FieldType.Double:
+          case FieldType.Int32:
+          case FieldType.Int64:
+          case FieldType.SInt32:
+          case FieldType.SInt64:
+          case FieldType.SFixed32:
+          case FieldType.SFixed64:
+          case FieldType.UInt32:
+          case FieldType.UInt64:
+          case FieldType.Fixed32:
+          case FieldType.Fixed64:
+            // The simple Object.ToString converts using the current culture.
+            // We want to always use the invariant culture so it's predictable.
+            IConvertible value = (IConvertible) Descriptor.DefaultValue;
+            return value.ToString(CultureInfo.InvariantCulture) + suffix;
+          case FieldType.Bool:
+            return (bool) Descriptor.DefaultValue ? "true" : "false";
+
+          case FieldType.Bytes:
+            if (!Descriptor.HasDefaultValue) {
+              return "pb::ByteString.Empty";
+            }
+            return string.Format("(pb::ByteString) {0}.Descriptor.Fields[{1}].DefaultValue", TypeName, Number);
+          case FieldType.String:
+            if (AllPrintableAscii(Descriptor.Proto.DefaultValue)) {
+              // All chars are ASCII and printable.  In this case we only
+              // need to escape quotes and backslashes.
+              return "\"" + Descriptor.Proto.DefaultValue
+                  .Replace("\\", "\\\\")
+                  .Replace("'", "\\'")
+                  .Replace("\"", "\\\"")
+                  + "\"";
+            }
+            return string.Format("(string) {0}.Descriptor.Fields[{1}].DefaultValue", TypeName, Number);
+          case FieldType.Enum:
+            return TypeName + "." + ((EnumValueDescriptor) Descriptor.DefaultValue).Name;
+          case FieldType.Message:
+          case FieldType.Group:
+            return TypeName + ".DefaultInstance";
+          default:
+            throw new InvalidOperationException("Invalid field descriptor type");
+        }
+      }
+    }
+
+    /// <summary>
+    /// Usually the same as CapitalizedName, except when the enclosing type has the same name,
+    /// in which case an underscore is appended.
+    /// </summary>
+    protected string PropertyName {
+      get {
+        string ret = CapitalizedName;
+        if (ret == Descriptor.ContainingType.Name) {
+          ret += "_";
+        }
+        return ret;
+      }
+    }
+
+    protected string CapitalizedName {
+      get { return Helpers.UnderscoresToPascalCase(DescriptorUtil.GetFieldName(Descriptor)); }
+    }
+
+    protected string Name {
+      get { return Helpers.UnderscoresToCamelCase(DescriptorUtil.GetFieldName(Descriptor)); }
+    }
+
+    protected int Number {
+      get { return Descriptor.FieldNumber; }
+    }
+
+    protected string TypeName {
+      get {
+        switch (Descriptor.FieldType) {
+          case FieldType.Enum:
+            return DescriptorUtil.GetClassName(Descriptor.EnumType);
+          case FieldType.Message:
+          case FieldType.Group:
+            return DescriptorUtil.GetClassName(Descriptor.MessageType);
+          default:
+            return DescriptorUtil.GetMappedTypeName(Descriptor.MappedType);
+        }
+      }
+    }
+
+    protected string MessageOrGroup {
+      get { return Descriptor.FieldType == FieldType.Group ? "Group" : "Message"; }
+    }
+
+    /// <summary>
+    /// Returns the type name as used in CodedInputStream method names: SFixed32, UInt32 etc.
+    /// </summary>
+    protected string CapitalizedTypeName {
+      get {
+        // Our enum names match perfectly. How serendipitous.
+        return Descriptor.FieldType.ToString();
+      }
+    }
+  }
+}