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Diffstat (limited to 'csharp/src/Google.Protobuf/CodedOutputStream.ComputeSize.cs')
| -rw-r--r-- | csharp/src/Google.Protobuf/CodedOutputStream.ComputeSize.cs | 304 |
1 files changed, 304 insertions, 0 deletions
diff --git a/csharp/src/Google.Protobuf/CodedOutputStream.ComputeSize.cs b/csharp/src/Google.Protobuf/CodedOutputStream.ComputeSize.cs new file mode 100644 index 00000000..bf221c9c --- /dev/null +++ b/csharp/src/Google.Protobuf/CodedOutputStream.ComputeSize.cs @@ -0,0 +1,304 @@ +#region Copyright notice and license
+// Protocol Buffers - Google's data interchange format
+// Copyright 2008 Google Inc. All rights reserved.
+// https://developers.google.com/protocol-buffers/
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+// * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+// * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+// * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#endregion
+
+using System;
+
+namespace Google.Protobuf
+{
+ // This part of CodedOutputStream provides all the static entry points that are used
+ // by generated code and internally to compute the size of messages prior to being
+ // written to an instance of CodedOutputStream.
+ public sealed partial class CodedOutputStream
+ {
+ private const int LittleEndian64Size = 8;
+ private const int LittleEndian32Size = 4;
+
+ /// <summary>
+ /// Computes the number of bytes that would be needed to encode a
+ /// double field, including the tag.
+ /// </summary>
+ public static int ComputeDoubleSize(double value)
+ {
+ return LittleEndian64Size;
+ }
+
+ /// <summary>
+ /// Computes the number of bytes that would be needed to encode a
+ /// float field, including the tag.
+ /// </summary>
+ public static int ComputeFloatSize(float value)
+ {
+ return LittleEndian32Size;
+ }
+
+ /// <summary>
+ /// Computes the number of bytes that would be needed to encode a
+ /// uint64 field, including the tag.
+ /// </summary>
+ public static int ComputeUInt64Size(ulong value)
+ {
+ return ComputeRawVarint64Size(value);
+ }
+
+ /// <summary>
+ /// Computes the number of bytes that would be needed to encode an
+ /// int64 field, including the tag.
+ /// </summary>
+ public static int ComputeInt64Size(long value)
+ {
+ return ComputeRawVarint64Size((ulong) value);
+ }
+
+ /// <summary>
+ /// Computes the number of bytes that would be needed to encode an
+ /// int32 field, including the tag.
+ /// </summary>
+ public static int ComputeInt32Size(int value)
+ {
+ if (value >= 0)
+ {
+ return ComputeRawVarint32Size((uint) value);
+ }
+ else
+ {
+ // Must sign-extend.
+ return 10;
+ }
+ }
+
+ /// <summary>
+ /// Computes the number of bytes that would be needed to encode a
+ /// fixed64 field, including the tag.
+ /// </summary>
+ public static int ComputeFixed64Size(ulong value)
+ {
+ return LittleEndian64Size;
+ }
+
+ /// <summary>
+ /// Computes the number of bytes that would be needed to encode a
+ /// fixed32 field, including the tag.
+ /// </summary>
+ public static int ComputeFixed32Size(uint value)
+ {
+ return LittleEndian32Size;
+ }
+
+ /// <summary>
+ /// Computes the number of bytes that would be needed to encode a
+ /// bool field, including the tag.
+ /// </summary>
+ public static int ComputeBoolSize(bool value)
+ {
+ return 1;
+ }
+
+ /// <summary>
+ /// Computes the number of bytes that would be needed to encode a
+ /// string field, including the tag.
+ /// </summary>
+ public static int ComputeStringSize(String value)
+ {
+ int byteArraySize = Utf8Encoding.GetByteCount(value);
+ return ComputeLengthSize(byteArraySize) + byteArraySize;
+ }
+
+ /// <summary>
+ /// Computes the number of bytes that would be needed to encode a
+ /// group field, including the tag.
+ /// </summary>
+ public static int ComputeGroupSize(IMessage value)
+ {
+ return value.CalculateSize();
+ }
+
+ /// <summary>
+ /// Computes the number of bytes that would be needed to encode an
+ /// embedded message field, including the tag.
+ /// </summary>
+ public static int ComputeMessageSize(IMessage value)
+ {
+ int size = value.CalculateSize();
+ return ComputeLengthSize(size) + size;
+ }
+
+ /// <summary>
+ /// Computes the number of bytes that would be needed to encode a
+ /// bytes field, including the tag.
+ /// </summary>
+ public static int ComputeBytesSize(ByteString value)
+ {
+ return ComputeLengthSize(value.Length) + value.Length;
+ }
+
+ /// <summary>
+ /// Computes the number of bytes that would be needed to encode a
+ /// uint32 field, including the tag.
+ /// </summary>
+ public static int ComputeUInt32Size(uint value)
+ {
+ return ComputeRawVarint32Size(value);
+ }
+
+ /// <summary>
+ /// Computes the number of bytes that would be needed to encode a
+ /// enum field, including the tag. The caller is responsible for
+ /// converting the enum value to its numeric value.
+ /// </summary>
+ public static int ComputeEnumSize(int value)
+ {
+ // Currently just a pass-through, but it's nice to separate it logically.
+ return ComputeInt32Size(value);
+ }
+
+ /// <summary>
+ /// Computes the number of bytes that would be needed to encode an
+ /// sfixed32 field, including the tag.
+ /// </summary>
+ public static int ComputeSFixed32Size(int value)
+ {
+ return LittleEndian32Size;
+ }
+
+ /// <summary>
+ /// Computes the number of bytes that would be needed to encode an
+ /// sfixed64 field, including the tag.
+ /// </summary>
+ public static int ComputeSFixed64Size(long value)
+ {
+ return LittleEndian64Size;
+ }
+
+ /// <summary>
+ /// Computes the number of bytes that would be needed to encode an
+ /// sint32 field, including the tag.
+ /// </summary>
+ public static int ComputeSInt32Size(int value)
+ {
+ return ComputeRawVarint32Size(EncodeZigZag32(value));
+ }
+
+ /// <summary>
+ /// Computes the number of bytes that would be needed to encode an
+ /// sint64 field, including the tag.
+ /// </summary>
+ public static int ComputeSInt64Size(long value)
+ {
+ return ComputeRawVarint64Size(EncodeZigZag64(value));
+ }
+
+ /// <summary>
+ /// Computes the number of bytes that would be needed to encode a length,
+ /// as written by <see cref="WriteLength"/>.
+ /// </summary>
+ public static int ComputeLengthSize(int length)
+ {
+ return ComputeRawVarint32Size((uint) length);
+ }
+
+ /// <summary>
+ /// Computes the number of bytes that would be needed to encode a varint.
+ /// </summary>
+ public static int ComputeRawVarint32Size(uint value)
+ {
+ if ((value & (0xffffffff << 7)) == 0)
+ {
+ return 1;
+ }
+ if ((value & (0xffffffff << 14)) == 0)
+ {
+ return 2;
+ }
+ if ((value & (0xffffffff << 21)) == 0)
+ {
+ return 3;
+ }
+ if ((value & (0xffffffff << 28)) == 0)
+ {
+ return 4;
+ }
+ return 5;
+ }
+
+ /// <summary>
+ /// Computes the number of bytes that would be needed to encode a varint.
+ /// </summary>
+ public static int ComputeRawVarint64Size(ulong value)
+ {
+ if ((value & (0xffffffffffffffffL << 7)) == 0)
+ {
+ return 1;
+ }
+ if ((value & (0xffffffffffffffffL << 14)) == 0)
+ {
+ return 2;
+ }
+ if ((value & (0xffffffffffffffffL << 21)) == 0)
+ {
+ return 3;
+ }
+ if ((value & (0xffffffffffffffffL << 28)) == 0)
+ {
+ return 4;
+ }
+ if ((value & (0xffffffffffffffffL << 35)) == 0)
+ {
+ return 5;
+ }
+ if ((value & (0xffffffffffffffffL << 42)) == 0)
+ {
+ return 6;
+ }
+ if ((value & (0xffffffffffffffffL << 49)) == 0)
+ {
+ return 7;
+ }
+ if ((value & (0xffffffffffffffffL << 56)) == 0)
+ {
+ return 8;
+ }
+ if ((value & (0xffffffffffffffffL << 63)) == 0)
+ {
+ return 9;
+ }
+ return 10;
+ }
+
+ /// <summary>
+ /// Computes the number of bytes that would be needed to encode a tag.
+ /// </summary>
+ public static int ComputeTagSize(int fieldNumber)
+ {
+ return ComputeRawVarint32Size(WireFormat.MakeTag(fieldNumber, 0));
+ }
+ }
+}
\ No newline at end of file |