--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/OrthancFramework/Sources/DicomFormat/DicomValue.cpp	Wed Jun 10 20:30:34 2020 +0200
@@ -0,0 +1,322 @@
+/**
+ * Orthanc - A Lightweight, RESTful DICOM Store
+ * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
+ * Department, University Hospital of Liege, Belgium
+ * Copyright (C) 2017-2020 Osimis S.A., Belgium
+ *
+ * This program is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * In addition, as a special exception, the copyright holders of this
+ * program give permission to link the code of its release with the
+ * OpenSSL project's "OpenSSL" library (or with modified versions of it
+ * that use the same license as the "OpenSSL" library), and distribute
+ * the linked executables. You must obey the GNU General Public License
+ * in all respects for all of the code used other than "OpenSSL". If you
+ * modify file(s) with this exception, you may extend this exception to
+ * your version of the file(s), but you are not obligated to do so. If
+ * you do not wish to do so, delete this exception statement from your
+ * version. If you delete this exception statement from all source files
+ * in the program, then also delete it here.
+ * 
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ **/
+
+
+#include "../PrecompiledHeaders.h"
+#include "DicomValue.h"
+
+#include "../OrthancException.h"
+#include "../SerializationToolbox.h"
+#include "../Toolbox.h"
+
+#include <boost/lexical_cast.hpp>
+
+namespace Orthanc
+{
+  DicomValue::DicomValue(const DicomValue& other) : 
+    type_(other.type_),
+    content_(other.content_)
+  {
+  }
+
+
+  DicomValue::DicomValue(const std::string& content,
+                         bool isBinary) :
+    type_(isBinary ? Type_Binary : Type_String),
+    content_(content)
+  {
+  }
+  
+  
+  DicomValue::DicomValue(const char* data,
+                         size_t size,
+                         bool isBinary) :
+    type_(isBinary ? Type_Binary : Type_String)
+  {
+    content_.assign(data, size);
+  }
+    
+  
+  const std::string& DicomValue::GetContent() const
+  {
+    if (type_ == Type_Null)
+    {
+      throw OrthancException(ErrorCode_BadParameterType);
+    }
+    else
+    {
+      return content_;
+    }
+  }
+
+
+  DicomValue* DicomValue::Clone() const
+  {
+    return new DicomValue(*this);
+  }
+
+  
+#if ORTHANC_ENABLE_BASE64 == 1
+  void DicomValue::FormatDataUriScheme(std::string& target,
+                                       const std::string& mime) const
+  {
+    Toolbox::EncodeBase64(target, GetContent());
+    target.insert(0, "data:" + mime + ";base64,");
+  }
+#endif
+
+  // same as ParseValue but in case the value actually contains a sequence,
+  // it will return the first value
+  // this has been introduced to support invalid "width/height" DICOM tags in some US
+  // images where the width is stored as "800\0" !
+  template <typename T,
+            bool allowSigned>
+  static bool ParseFirstValue(T& result,
+                              const DicomValue& source)
+  {
+    if (source.IsBinary() ||
+        source.IsNull())
+    {
+      return false;
+    }
+
+    try
+    {
+      std::string value = Toolbox::StripSpaces(source.GetContent());
+      if (value.empty())
+      {
+        return false;
+      }
+
+      if (!allowSigned &&
+          value[0] == '-')
+      {
+        return false;
+      }
+
+      if (value.find("\\") == std::string::npos)
+      {
+        result = boost::lexical_cast<T>(value);
+        return true;
+      }
+      else
+      {
+        std::vector<std::string> tokens;
+        Toolbox::TokenizeString(tokens, value, '\\');
+
+        if (tokens.size() >= 1)
+        {
+          result = boost::lexical_cast<T>(tokens[0]);
+          return true;
+        }
+
+        return false;
+      }
+    }
+    catch (boost::bad_lexical_cast&)
+    {
+      return false;
+    }
+  }
+
+
+  template <typename T,
+            bool allowSigned>
+  static bool ParseValue(T& result,
+                         const DicomValue& source)
+  {
+    if (source.IsBinary() ||
+        source.IsNull())
+    {
+      return false;
+    }
+    
+    try
+    {
+      std::string value = Toolbox::StripSpaces(source.GetContent());
+      if (value.empty())
+      {
+        return false;
+      }
+
+      if (!allowSigned &&
+          value[0] == '-')
+      {
+        return false;
+      }
+      
+      result = boost::lexical_cast<T>(value);
+      return true;
+    }
+    catch (boost::bad_lexical_cast&)
+    {
+      return false;
+    }
+  }
+
+  bool DicomValue::ParseInteger32(int32_t& result) const
+  {
+    int64_t tmp;
+    if (ParseValue<int64_t, true>(tmp, *this))
+    {
+      result = static_cast<int32_t>(tmp);
+      return (tmp == static_cast<int64_t>(result));  // Check no overflow occurs
+    }
+    else
+    {
+      return false;
+    }
+  }
+
+  bool DicomValue::ParseInteger64(int64_t& result) const
+  {
+    return ParseValue<int64_t, true>(result, *this);
+  }
+
+  bool DicomValue::ParseUnsignedInteger32(uint32_t& result) const
+  {
+    uint64_t tmp;
+    if (ParseValue<uint64_t, false>(tmp, *this))
+    {
+      result = static_cast<uint32_t>(tmp);
+      return (tmp == static_cast<uint64_t>(result));  // Check no overflow occurs
+    }
+    else
+    {
+      return false;
+    }
+  }
+
+  bool DicomValue::ParseUnsignedInteger64(uint64_t& result) const
+  {
+    return ParseValue<uint64_t, false>(result, *this);
+  }
+
+  bool DicomValue::ParseFloat(float& result) const
+  {
+    return ParseValue<float, true>(result, *this);
+  }
+
+  bool DicomValue::ParseDouble(double& result) const
+  {
+    return ParseValue<double, true>(result, *this);
+  }
+
+  bool DicomValue::ParseFirstFloat(float& result) const
+  {
+    return ParseFirstValue<float, true>(result, *this);
+  }
+
+  bool DicomValue::ParseFirstUnsignedInteger(unsigned int& result) const
+  {
+    return ParseFirstValue<unsigned int, true>(result, *this);
+  }
+
+  bool DicomValue::CopyToString(std::string& result,
+                                bool allowBinary) const
+  {
+    if (IsNull())
+    {
+      return false;
+    }
+    else if (IsBinary() && !allowBinary)
+    {
+      return false;
+    }
+    else
+    {
+      result.assign(content_);
+      return true;
+    }
+  }    
+
+
+  static const char* KEY_TYPE = "Type";
+  static const char* KEY_CONTENT = "Content";
+  
+  void DicomValue::Serialize(Json::Value& target) const
+  {
+    target = Json::objectValue;
+
+    switch (type_)
+    {
+      case Type_Null:
+        target[KEY_TYPE] = "Null";
+        break;
+
+      case Type_String:
+        target[KEY_TYPE] = "String";
+        target[KEY_CONTENT] = content_;
+        break;
+
+      case Type_Binary:
+      {
+        target[KEY_TYPE] = "Binary";
+
+        std::string base64;
+        Toolbox::EncodeBase64(base64, content_);
+        target[KEY_CONTENT] = base64;
+        break;
+      }
+
+      default:
+        throw OrthancException(ErrorCode_InternalError);
+    }
+  }
+
+  void DicomValue::Unserialize(const Json::Value& source)
+  {
+    std::string type = SerializationToolbox::ReadString(source, KEY_TYPE);
+
+    if (type == "Null")
+    {
+      type_ = Type_Null;
+      content_.clear();
+    }
+    else if (type == "String")
+    {
+      type_ = Type_String;
+      content_ = SerializationToolbox::ReadString(source, KEY_CONTENT);
+    }
+    else if (type == "Binary")
+    {
+      type_ = Type_Binary;
+
+      const std::string base64 =SerializationToolbox::ReadString(source, KEY_CONTENT);
+      Toolbox::DecodeBase64(content_, base64);
+    }
+    else
+    {
+      throw OrthancException(ErrorCode_BadFileFormat);
+    }
+  }
+}