Function ValidateGLBFile

IO/Geometry/vtkGLTFUtils.cxx:273–302

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bool ValidateGLBFile(const std::string& magic, uint32_t version, uint32_t fileLength,
  std::vector<vtkGLTFUtils::ChunkInfoType> chunkInfo)
{
  // Check header
  if (magic != "glTF" || version != vtkGLTFUtils::GLBVersion)
  {
    return false;
  }
  if (chunkInfo.empty())
  {
    return false;
  }
  // Compute sum of chunk sizes and check that first chunk is json
  size_t lengthSum = 0;
  for (size_t chunkNumber = 0; chunkNumber < chunkInfo.size(); chunkNumber++)
  {
    if (chunkNumber == 0)
    {
      if (chunkInfo[chunkNumber].first != "JSON")
      {
        return false;
      }
    }
    lengthSum += chunkInfo[chunkNumber].second;
  }
  // Compute total size
  lengthSum += vtkGLTFUtils::GLBHeaderSize + chunkInfo.size() * vtkGLTFUtils::GLBChunkHeaderSize;
  // Check for inconsistent chunk sizes
  return fileLength == lengthSum;
}
VTK_ABI_NAMESPACE_END
}