kc3-lang/angle/src/compiler/translator/TranslatorMetalDirect/IdGen.cpp

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• Author : Kyle Piddington
  Date : 2021-04-26 16:56:15
  Hash : d7aa0130
  Message : Upstream Apple's direct-to-Metal backend: compile translator. This change is meant to merge the translator changes from Apple's direct-to-Metal backend. Taken from Kyle Piddington's CL: https://chromium-review.googlesource.com/c/angle/angle/+/2857366/ The goal of this CL is to merge the translator code in a state that compiles, but not to switch the Metal backend over to use this translator backend yet. Bug: angleproject:5505 Change-Id: I68a6354604498cd5fd1eb96c13fc56f3b38f2bd0 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2897536 Reviewed-by: Jonah Ryan-Davis <jonahr@google.com> Commit-Queue: Jonah Ryan-Davis <jonahr@google.com>

• src/compiler/translator/TranslatorMetalDirect/IdGen.cpp

• //
  // Copyright 2020 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.
  //
  
  #include <cctype>
  #include <cstring>
  #include <limits>
  #include <unordered_map>
  #include <unordered_set>
  
  #include "compiler/translator/TranslatorMetalDirect/RewriteKeywords.h"
  
  using namespace sh;
  
  ////////////////////////////////////////////////////////////////////////////////
  
  IdGen::IdGen() {}
  
  template <typename String, typename StringToImmutable>
  Name IdGen::createNewName(size_t count,
                            const String *baseNames,
                            const StringToImmutable &toImmutable)
  {
      const unsigned id = mNext++;
      char idBuffer[std::numeric_limits<unsigned>::digits10 + 1];
      sprintf(idBuffer, "%u", id);
  
      mNewNameBuffer.clear();
      mNewNameBuffer += '_';
      mNewNameBuffer += idBuffer;
  
      // Note:
      // Double underscores are only allowed in C++ (and thus Metal) vendor identifiers, so here we
      // take care not to introduce any.
  
      for (size_t i = 0; i < count; ++i)
      {
          const ImmutableString baseName = toImmutable(baseNames[i]);
          if (!baseName.empty())
          {
              const char *base = baseName.data();
              if (baseName.beginsWith(kAngleInternalPrefix))
              {
                  base += sizeof(kAngleInternalPrefix) - 1;
              }
              if (*base == '_')
              {
                  ++base;
              }
              ASSERT(*base != '_');
  
              if (mNewNameBuffer.back() != '_')
              {
                  mNewNameBuffer += '_';
              }
  
              mNewNameBuffer += base;
          }
      }
  
      return Name(ImmutableString(mNewNameBuffer), SymbolType::AngleInternal);
  }
  
  Name IdGen::createNewName(const ImmutableString &baseName)
  {
      return createNewName({baseName});
  }
  
  Name IdGen::createNewName(const Name &baseName)
  {
      return createNewName(baseName.rawName());
  }
  
  Name IdGen::createNewName(const char *baseName)
  {
      return createNewName(ImmutableString(baseName));
  }
  
  Name IdGen::createNewName(std::initializer_list<ImmutableString> baseNames)
  {
      return createNewName(baseNames.size(), baseNames.begin(),
                           [](const ImmutableString &s) { return s; });
  }
  
  Name IdGen::createNewName(std::initializer_list<Name> baseNames)
  {
      return createNewName(baseNames.size(), baseNames.begin(),
                           [](const Name &s) { return s.rawName(); });
  }
  
  Name IdGen::createNewName(std::initializer_list<const char *> baseNames)
  {
      return createNewName(baseNames.size(), baseNames.begin(),
                           [](const char *s) { return ImmutableString(s); });
  }