kc3-lang/angle/src/compiler/translator/ImmutableString.cpp

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  Commit

• Author : Jamie Madill
  Date : 2018-11-27 11:34:27
  Hash : b980c563
  Message : Reformat all cpp and h files. This applies git cl format --full to all ANGLE sources. Bug: angleproject:2986 Change-Id: Ib504e618c1589332a37e97696cdc3515d739308f Reviewed-on: https://chromium-review.googlesource.com/c/1351367 Reviewed-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>

• src/compiler/translator/ImmutableString.cpp

• //
  // Copyright (c) 2018 The ANGLE Project Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  //
  // ImmutableString.cpp: Wrapper for static or pool allocated char arrays, that are guaranteed to be
  // valid and unchanged for the duration of the compilation.
  //
  
  #include "compiler/translator/ImmutableString.h"
  
  std::ostream &operator<<(std::ostream &os, const sh::ImmutableString &str)
  {
      return os.write(str.data(), str.length());
  }
  
  #if defined(_MSC_VER)
  #    pragma warning(disable : 4309)  // truncation of constant value
  #endif
  
  namespace sh
  {
  
  template <>
  const size_t ImmutableString::FowlerNollVoHash<4>::kFnvPrime = 16777619u;
  
  template <>
  const size_t ImmutableString::FowlerNollVoHash<4>::kFnvOffsetBasis = 0x811c9dc5u;
  
  template <>
  const size_t ImmutableString::FowlerNollVoHash<8>::kFnvPrime =
      static_cast<size_t>(1099511628211ull);
  
  template <>
  const size_t ImmutableString::FowlerNollVoHash<8>::kFnvOffsetBasis =
      static_cast<size_t>(0xcbf29ce484222325ull);
  
  uint32_t ImmutableString::mangledNameHash() const
  {
      const char *dataPtr              = data();
      uint32_t hash                    = static_cast<uint32_t>(FowlerNollVoHash<4>::kFnvOffsetBasis);
      const uint32_t kMaxSixBitValue   = (1u << 6) - 1u;
      uint32_t parenLocation           = kMaxSixBitValue;
      uint32_t hasArrayOrBlockParamBit = 0u;
      uint32_t index                   = 0;
      while (dataPtr[index] != '\0')
      {
          hash = hash ^ dataPtr[index];
          hash = hash * static_cast<uint32_t>(FowlerNollVoHash<4>::kFnvPrime);
          if (dataPtr[index] == '(')
          {
              // We should only reach here once, since this function should not be called with invalid
              // mangled names.
              ASSERT(parenLocation == kMaxSixBitValue);
              parenLocation = index;
          }
          else if (dataPtr[index] == '{' || dataPtr[index] == '[')
          {
              hasArrayOrBlockParamBit = 1u;
          }
          ++index;
      }
      // Should not be called with strings longer than 63 characters.
      ASSERT(index <= kMaxSixBitValue);
      return ((hash >> 13) ^ (hash & 0x1fff)) | (index << 19) | (parenLocation << 25) |
             (hasArrayOrBlockParamBit << 31);
  }
  
  }  // namespace sh