Transition to pulling open-vcdiff from repository, instead of using snapshot...

sdch/open_vcdiff/depot/opensource/open-vcdiff/src/codetable.h

Index: sdch/open_vcdiff/depot/opensource/open-vcdiff/src/codetable.h
===================================================================
--- sdch/open_vcdiff/depot/opensource/open-vcdiff/src/codetable.h	(revision 2678)
+++ sdch/open_vcdiff/depot/opensource/open-vcdiff/src/codetable.h	(working copy)
@@ -1,127 +0,0 @@
-// Copyright 2008 Google Inc.
-// Author: Lincoln Smith
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// Classes to implement the Code Table
-// described in sections 5.5, 5.6 and 7 of
-// RFC 3284 - The VCDIFF Generic Differencing and Compression Data Format.
-// The RFC text can be found at http://www.faqs.org/rfcs/rfc3284.html
-
-#ifndef OPEN_VCDIFF_CODETABLE_H_
-#define OPEN_VCDIFF_CODETABLE_H_
-
-#include <config.h>
-#include <stdint.h>             // uint16_t
-
-namespace open_vcdiff {
-
-// The instruction types from section 5.5 (mistakenly labeled 5.4) of the RFC.
-//
-enum VCDiffInstructionType {
-  VCD_NOOP = 0,
-  VCD_ADD  = 1,
-  VCD_RUN  = 2,
-  VCD_COPY = 3,
-  VCD_LAST_INSTRUCTION_TYPE = VCD_COPY,
-  // The following values are not true instruction types, but rather
-  // special condition values for functions that return VCDiffInstructionType.
-  VCD_INSTRUCTION_ERROR = 4,
-  VCD_INSTRUCTION_END_OF_DATA = 5
-};
-
-const char* VCDiffInstructionName(VCDiffInstructionType inst);
-
-// OpcodeOrNone: An opcode is a value between 0-255.  There is not room
-// in a single byte to express all these values plus a "no opcode found"
-// value.  So use a 16-bit integer to hold either an opcode or kNoOpcode.
-//
-typedef uint16_t OpcodeOrNone;
-const OpcodeOrNone kNoOpcode = 0x100;  // outside the opcode range 0x00 - 0xFF
-
-// struct VCDiffCodeTableData:
-//
-// A representation of the VCDiff code table as six 256-byte arrays
-// as described in Section 7 of RFC 3284.  Each instruction code
-// can represent up to two delta instructions, which is why inst,
-// size, and mode each appear twice.  Each of the two delta instructions
-// has the following three attributes:
-// * inst (NOOP, ADD, RUN, or COPY)
-// * size (0-255 bytes) of the data to be copied; if this value is zero, then
-//   the size will be encoded separately from the instruction code, as a Varint
-// * mode (SELF, HERE, NEAR(n), or SAME(n)), only used for COPY instructions
-//
-// Every valid code table should contain AT LEAST the following instructions:
-//     inst1=ADD  size1=0 mode1=X inst2=NOOP size2=X mode2=X
-//     inst1=RUN  size1=0 mode1=X inst2=NOOP size2=X mode2=X
-//     inst1=COPY size1=0 mode1=N inst2=NOOP size2=X mode2=X (for all N)
-// ... where X represents a "don't care" value which will not be read,
-// and N stands for every possible COPY mode between 0 and
-// ([same cache size] + [here cache size]) inclusive.
-// Without these instructions, it will be impossible to guarantee that
-// all ADD, RUN, and COPY encoding requests can be fulfilled.
-//
-struct VCDiffCodeTableData {
-  static const int kCodeTableSize = 256;
-
-  static const VCDiffCodeTableData kDefaultCodeTableData;
-
-  // Validates that the data contained in the VCDiffCodeTableData structure
-  // does not violate certain assumptions.  Returns true if none of these
-  // assumptions are violated, or false if an unexpected value is found.
-  // This function should be called on any non-default code table that is
-  // received as part of an encoded transmission.
-  // max_mode is the maximum value for the mode of a COPY instruction;
-  // this is equal to same_cache_size + near_cache_size + 1.
-  //
-  bool Validate(unsigned char max_mode) const;
-
-  // This version of Validate() assumes that the default address cache sizes
-  // are being used, and calculates max_mode based on that assumption.
-  bool Validate() const;
-
-  // The names of these elements are taken from RFC 3284 section 5.4
-  // (Instruction Codes), which contains the following specification:
-  //
-  // Each instruction code entry contains six fields, each of which is a single
-  // byte with an unsigned value:
-  // +-----------------------------------------------+
-  // | inst1 | size1 | mode1 | inst2 | size2 | mode2 |
-  // +-----------------------------------------------+
-  //
-  unsigned char inst1[kCodeTableSize];  // from enum VCDiffInstructionType
-  unsigned char inst2[kCodeTableSize];  // from enum VCDiffInstructionType
-  unsigned char size1[kCodeTableSize];
-  unsigned char size2[kCodeTableSize];
-  unsigned char mode1[kCodeTableSize];  // from enum VCDiffModes
-  unsigned char mode2[kCodeTableSize];  // from enum VCDiffModes
-
- private:
-  // Single-letter abbreviations that make it easier to read
-  // the default code table data.
-  static const VCDiffInstructionType N = VCD_NOOP;
-  static const VCDiffInstructionType A = VCD_ADD;
-  static const VCDiffInstructionType R = VCD_RUN;
-  static const VCDiffInstructionType C = VCD_COPY;
-
-  static bool ValidateOpcode(int opcode,
-                             unsigned char inst,
-                             unsigned char size,
-                             unsigned char mode,
-                             unsigned char max_mode,
-                             const char* first_or_second);
-};
-
-}  // namespace open_vcdiff
-
-#endif  // OPEN_VCDIFF_CODETABLE_H_